wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1 | # |
Wolfgang Denk | 1234ce7 | 2013-06-21 10:22:36 +0200 | [diff] [blame] | 2 | # (C) Copyright 2000 - 2013 |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3 | # Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| 4 | # |
Wolfgang Denk | 1234ce7 | 2013-06-21 10:22:36 +0200 | [diff] [blame] | 5 | # SPDX-License-Identifier: GPL-2.0+ |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6 | # |
| 7 | |
| 8 | Summary: |
| 9 | ======== |
| 10 | |
wdenk | 24ee89b | 2002-11-03 17:56:27 +0000 | [diff] [blame] | 11 | This directory contains the source code for U-Boot, a boot loader for |
wdenk | ce4832c | 2004-10-17 21:12:06 +0000 | [diff] [blame] | 12 | Embedded boards based on PowerPC, ARM, MIPS and several other |
| 13 | processors, which can be installed in a boot ROM and used to |
| 14 | initialize and test the hardware or to download and run application |
| 15 | code. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 16 | |
| 17 | The development of U-Boot is closely related to Linux: some parts of |
wdenk | 24ee89b | 2002-11-03 17:56:27 +0000 | [diff] [blame] | 18 | the source code originate in the Linux source tree, we have some |
| 19 | header files in common, and special provision has been made to |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 20 | support booting of Linux images. |
| 21 | |
| 22 | Some attention has been paid to make this software easily |
| 23 | configurable and extendable. For instance, all monitor commands are |
| 24 | implemented with the same call interface, so that it's very easy to |
| 25 | add new commands. Also, instead of permanently adding rarely used |
| 26 | code (for instance hardware test utilities) to the monitor, you can |
| 27 | load and run it dynamically. |
| 28 | |
| 29 | |
| 30 | Status: |
| 31 | ======= |
| 32 | |
| 33 | In general, all boards for which a configuration option exists in the |
wdenk | 24ee89b | 2002-11-03 17:56:27 +0000 | [diff] [blame] | 34 | Makefile have been tested to some extent and can be considered |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 35 | "working". In fact, many of them are used in production systems. |
| 36 | |
Robert P. J. Day | 076ed9b | 2015-12-19 07:16:10 -0500 | [diff] [blame] | 37 | In case of problems see the CHANGELOG file to find out who contributed |
| 38 | the specific port. In addition, there are various MAINTAINERS files |
| 39 | scattered throughout the U-Boot source identifying the people or |
| 40 | companies responsible for various boards and subsystems. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 41 | |
Robert P. J. Day | 076ed9b | 2015-12-19 07:16:10 -0500 | [diff] [blame] | 42 | Note: As of August, 2010, there is no longer a CHANGELOG file in the |
| 43 | actual U-Boot source tree; however, it can be created dynamically |
| 44 | from the Git log using: |
Robert P. J. Day | 974ed2f | 2012-11-14 02:03:20 +0000 | [diff] [blame] | 45 | |
| 46 | make CHANGELOG |
| 47 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 48 | |
| 49 | Where to get help: |
| 50 | ================== |
| 51 | |
wdenk | 24ee89b | 2002-11-03 17:56:27 +0000 | [diff] [blame] | 52 | In case you have questions about, problems with or contributions for |
Robert P. J. Day | 076ed9b | 2015-12-19 07:16:10 -0500 | [diff] [blame] | 53 | U-Boot, you should send a message to the U-Boot mailing list at |
Peter Tyser | 8804a61 | 2008-09-10 09:18:34 -0500 | [diff] [blame] | 54 | <u-boot@lists.denx.de>. There is also an archive of previous traffic |
| 55 | on the mailing list - please search the archive before asking FAQ's. |
| 56 | Please see http://lists.denx.de/pipermail/u-boot and |
| 57 | http://dir.gmane.org/gmane.comp.boot-loaders.u-boot |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 58 | |
| 59 | |
Wolfgang Denk | b240aef | 2008-03-26 10:40:12 +0100 | [diff] [blame] | 60 | Where to get source code: |
| 61 | ========================= |
| 62 | |
Robert P. J. Day | 076ed9b | 2015-12-19 07:16:10 -0500 | [diff] [blame] | 63 | The U-Boot source code is maintained in the Git repository at |
Wolfgang Denk | b240aef | 2008-03-26 10:40:12 +0100 | [diff] [blame] | 64 | git://www.denx.de/git/u-boot.git ; you can browse it online at |
| 65 | http://www.denx.de/cgi-bin/gitweb.cgi?p=u-boot.git;a=summary |
| 66 | |
| 67 | The "snapshot" links on this page allow you to download tarballs of |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 68 | any version you might be interested in. Official releases are also |
Wolfgang Denk | b240aef | 2008-03-26 10:40:12 +0100 | [diff] [blame] | 69 | available for FTP download from the ftp://ftp.denx.de/pub/u-boot/ |
| 70 | directory. |
| 71 | |
Anatolij Gustschin | 08337f3 | 2008-03-26 18:13:33 +0100 | [diff] [blame] | 72 | Pre-built (and tested) images are available from |
Wolfgang Denk | b240aef | 2008-03-26 10:40:12 +0100 | [diff] [blame] | 73 | ftp://ftp.denx.de/pub/u-boot/images/ |
| 74 | |
| 75 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 76 | Where we come from: |
| 77 | =================== |
| 78 | |
| 79 | - start from 8xxrom sources |
wdenk | 24ee89b | 2002-11-03 17:56:27 +0000 | [diff] [blame] | 80 | - create PPCBoot project (http://sourceforge.net/projects/ppcboot) |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 81 | - clean up code |
| 82 | - make it easier to add custom boards |
| 83 | - make it possible to add other [PowerPC] CPUs |
| 84 | - extend functions, especially: |
| 85 | * Provide extended interface to Linux boot loader |
| 86 | * S-Record download |
| 87 | * network boot |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 88 | * PCMCIA / CompactFlash / ATA disk / SCSI ... boot |
wdenk | 24ee89b | 2002-11-03 17:56:27 +0000 | [diff] [blame] | 89 | - create ARMBoot project (http://sourceforge.net/projects/armboot) |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 90 | - add other CPU families (starting with ARM) |
wdenk | 24ee89b | 2002-11-03 17:56:27 +0000 | [diff] [blame] | 91 | - create U-Boot project (http://sourceforge.net/projects/u-boot) |
Magnus Lilja | f3b287b | 2008-08-06 19:32:33 +0200 | [diff] [blame] | 92 | - current project page: see http://www.denx.de/wiki/U-Boot |
wdenk | 24ee89b | 2002-11-03 17:56:27 +0000 | [diff] [blame] | 93 | |
| 94 | |
| 95 | Names and Spelling: |
| 96 | =================== |
| 97 | |
| 98 | The "official" name of this project is "Das U-Boot". The spelling |
| 99 | "U-Boot" shall be used in all written text (documentation, comments |
| 100 | in source files etc.). Example: |
| 101 | |
| 102 | This is the README file for the U-Boot project. |
| 103 | |
| 104 | File names etc. shall be based on the string "u-boot". Examples: |
| 105 | |
| 106 | include/asm-ppc/u-boot.h |
| 107 | |
| 108 | #include <asm/u-boot.h> |
| 109 | |
| 110 | Variable names, preprocessor constants etc. shall be either based on |
| 111 | the string "u_boot" or on "U_BOOT". Example: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 112 | |
wdenk | 24ee89b | 2002-11-03 17:56:27 +0000 | [diff] [blame] | 113 | U_BOOT_VERSION u_boot_logo |
| 114 | IH_OS_U_BOOT u_boot_hush_start |
| 115 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 116 | |
wdenk | 7474aca | 2002-12-17 17:55:09 +0000 | [diff] [blame] | 117 | Versioning: |
| 118 | =========== |
| 119 | |
Thomas Weber | e89e628 | 2010-09-28 08:06:25 +0200 | [diff] [blame] | 120 | Starting with the release in October 2008, the names of the releases |
| 121 | were changed from numerical release numbers without deeper meaning |
| 122 | into a time stamp based numbering. Regular releases are identified by |
| 123 | names consisting of the calendar year and month of the release date. |
| 124 | Additional fields (if present) indicate release candidates or bug fix |
| 125 | releases in "stable" maintenance trees. |
wdenk | 7474aca | 2002-12-17 17:55:09 +0000 | [diff] [blame] | 126 | |
Thomas Weber | e89e628 | 2010-09-28 08:06:25 +0200 | [diff] [blame] | 127 | Examples: |
Wolfgang Denk | 092ae95 | 2011-10-26 10:21:21 +0000 | [diff] [blame] | 128 | U-Boot v2009.11 - Release November 2009 |
Thomas Weber | e89e628 | 2010-09-28 08:06:25 +0200 | [diff] [blame] | 129 | U-Boot v2009.11.1 - Release 1 in version November 2009 stable tree |
| 130 | U-Boot v2010.09-rc1 - Release candiate 1 for September 2010 release |
wdenk | 7474aca | 2002-12-17 17:55:09 +0000 | [diff] [blame] | 131 | |
| 132 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 133 | Directory Hierarchy: |
| 134 | ==================== |
| 135 | |
Peter Tyser | e4d1abc | 2010-04-12 22:28:21 -0500 | [diff] [blame] | 136 | /arch Architecture specific files |
Masahiro Yamada | ef6ebff | 2014-03-07 18:02:02 +0900 | [diff] [blame] | 137 | /arc Files generic to ARC architecture |
Peter Tyser | e4d1abc | 2010-04-12 22:28:21 -0500 | [diff] [blame] | 138 | /arm Files generic to ARM architecture |
Peter Tyser | e4d1abc | 2010-04-12 22:28:21 -0500 | [diff] [blame] | 139 | /avr32 Files generic to AVR32 architecture |
Peter Tyser | e4d1abc | 2010-04-12 22:28:21 -0500 | [diff] [blame] | 140 | /blackfin Files generic to Analog Devices Blackfin architecture |
Peter Tyser | e4d1abc | 2010-04-12 22:28:21 -0500 | [diff] [blame] | 141 | /m68k Files generic to m68k architecture |
Peter Tyser | e4d1abc | 2010-04-12 22:28:21 -0500 | [diff] [blame] | 142 | /microblaze Files generic to microblaze architecture |
Peter Tyser | e4d1abc | 2010-04-12 22:28:21 -0500 | [diff] [blame] | 143 | /mips Files generic to MIPS architecture |
Macpaul Lin | 1cac36e | 2011-10-19 20:41:11 +0000 | [diff] [blame] | 144 | /nds32 Files generic to NDS32 architecture |
Peter Tyser | e4d1abc | 2010-04-12 22:28:21 -0500 | [diff] [blame] | 145 | /nios2 Files generic to Altera NIOS2 architecture |
Robert P. J. Day | a269c93 | 2013-09-15 18:34:15 -0400 | [diff] [blame] | 146 | /openrisc Files generic to OpenRISC architecture |
Stefan Roese | 88fbf93 | 2010-04-15 16:07:28 +0200 | [diff] [blame] | 147 | /powerpc Files generic to PowerPC architecture |
Robert P. J. Day | 076ed9b | 2015-12-19 07:16:10 -0500 | [diff] [blame] | 148 | /sandbox Files generic to HW-independent "sandbox" |
Peter Tyser | e4d1abc | 2010-04-12 22:28:21 -0500 | [diff] [blame] | 149 | /sh Files generic to SH architecture |
Peter Tyser | e4d1abc | 2010-04-12 22:28:21 -0500 | [diff] [blame] | 150 | /sparc Files generic to SPARC architecture |
Robert P. J. Day | a269c93 | 2013-09-15 18:34:15 -0400 | [diff] [blame] | 151 | /x86 Files generic to x86 architecture |
Peter Tyser | e4d1abc | 2010-04-12 22:28:21 -0500 | [diff] [blame] | 152 | /api Machine/arch independent API for external apps |
| 153 | /board Board dependent files |
Xu Ziyuan | fb1f939 | 2016-08-26 19:54:49 +0800 | [diff] [blame] | 154 | /cmd U-Boot commands functions |
Peter Tyser | e4d1abc | 2010-04-12 22:28:21 -0500 | [diff] [blame] | 155 | /common Misc architecture independent functions |
Robert P. J. Day | 076ed9b | 2015-12-19 07:16:10 -0500 | [diff] [blame] | 156 | /configs Board default configuration files |
Peter Tyser | e4d1abc | 2010-04-12 22:28:21 -0500 | [diff] [blame] | 157 | /disk Code for disk drive partition handling |
| 158 | /doc Documentation (don't expect too much) |
| 159 | /drivers Commonly used device drivers |
Robert P. J. Day | a269c93 | 2013-09-15 18:34:15 -0400 | [diff] [blame] | 160 | /dts Contains Makefile for building internal U-Boot fdt. |
Peter Tyser | e4d1abc | 2010-04-12 22:28:21 -0500 | [diff] [blame] | 161 | /examples Example code for standalone applications, etc. |
| 162 | /fs Filesystem code (cramfs, ext2, jffs2, etc.) |
| 163 | /include Header Files |
Robert P. J. Day | 076ed9b | 2015-12-19 07:16:10 -0500 | [diff] [blame] | 164 | /lib Library routines generic to all architectures |
| 165 | /Licenses Various license files |
Peter Tyser | e4d1abc | 2010-04-12 22:28:21 -0500 | [diff] [blame] | 166 | /net Networking code |
| 167 | /post Power On Self Test |
Robert P. J. Day | 076ed9b | 2015-12-19 07:16:10 -0500 | [diff] [blame] | 168 | /scripts Various build scripts and Makefiles |
| 169 | /test Various unit test files |
Peter Tyser | e4d1abc | 2010-04-12 22:28:21 -0500 | [diff] [blame] | 170 | /tools Tools to build S-Record or U-Boot images, etc. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 171 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 172 | Software Configuration: |
| 173 | ======================= |
| 174 | |
| 175 | Configuration is usually done using C preprocessor defines; the |
| 176 | rationale behind that is to avoid dead code whenever possible. |
| 177 | |
| 178 | There are two classes of configuration variables: |
| 179 | |
| 180 | * Configuration _OPTIONS_: |
| 181 | These are selectable by the user and have names beginning with |
| 182 | "CONFIG_". |
| 183 | |
| 184 | * Configuration _SETTINGS_: |
| 185 | These depend on the hardware etc. and should not be meddled with if |
| 186 | you don't know what you're doing; they have names beginning with |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 187 | "CONFIG_SYS_". |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 188 | |
Robert P. J. Day | 076ed9b | 2015-12-19 07:16:10 -0500 | [diff] [blame] | 189 | Previously, all configuration was done by hand, which involved creating |
| 190 | symbolic links and editing configuration files manually. More recently, |
| 191 | U-Boot has added the Kbuild infrastructure used by the Linux kernel, |
| 192 | allowing you to use the "make menuconfig" command to configure your |
| 193 | build. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 194 | |
| 195 | |
| 196 | Selection of Processor Architecture and Board Type: |
| 197 | --------------------------------------------------- |
| 198 | |
| 199 | For all supported boards there are ready-to-use default |
Holger Freyther | 7ba4e57 | 2014-08-04 09:26:05 +0200 | [diff] [blame] | 200 | configurations available; just type "make <board_name>_defconfig". |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 201 | |
| 202 | Example: For a TQM823L module type: |
| 203 | |
| 204 | cd u-boot |
Holger Freyther | 7ba4e57 | 2014-08-04 09:26:05 +0200 | [diff] [blame] | 205 | make TQM823L_defconfig |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 206 | |
Robert P. J. Day | 076ed9b | 2015-12-19 07:16:10 -0500 | [diff] [blame] | 207 | Note: If you're looking for the default configuration file for a board |
| 208 | you're sure used to be there but is now missing, check the file |
| 209 | doc/README.scrapyard for a list of no longer supported boards. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 210 | |
Simon Glass | 53552c9 | 2014-03-22 17:12:59 -0600 | [diff] [blame] | 211 | Sandbox Environment: |
| 212 | -------------------- |
| 213 | |
| 214 | U-Boot can be built natively to run on a Linux host using the 'sandbox' |
| 215 | board. This allows feature development which is not board- or architecture- |
| 216 | specific to be undertaken on a native platform. The sandbox is also used to |
| 217 | run some of U-Boot's tests. |
| 218 | |
Jagannadha Sutradharudu Teki | 287314f | 2014-08-31 21:19:43 +0530 | [diff] [blame] | 219 | See board/sandbox/README.sandbox for more details. |
Simon Glass | 53552c9 | 2014-03-22 17:12:59 -0600 | [diff] [blame] | 220 | |
| 221 | |
Simon Glass | d8711af | 2015-03-03 08:03:00 -0700 | [diff] [blame] | 222 | Board Initialisation Flow: |
| 223 | -------------------------- |
| 224 | |
| 225 | This is the intended start-up flow for boards. This should apply for both |
Robert P. J. Day | 076ed9b | 2015-12-19 07:16:10 -0500 | [diff] [blame] | 226 | SPL and U-Boot proper (i.e. they both follow the same rules). |
| 227 | |
| 228 | Note: "SPL" stands for "Secondary Program Loader," which is explained in |
| 229 | more detail later in this file. |
| 230 | |
| 231 | At present, SPL mostly uses a separate code path, but the function names |
| 232 | and roles of each function are the same. Some boards or architectures |
| 233 | may not conform to this. At least most ARM boards which use |
| 234 | CONFIG_SPL_FRAMEWORK conform to this. |
Simon Glass | d8711af | 2015-03-03 08:03:00 -0700 | [diff] [blame] | 235 | |
Robert P. J. Day | 076ed9b | 2015-12-19 07:16:10 -0500 | [diff] [blame] | 236 | Execution typically starts with an architecture-specific (and possibly |
| 237 | CPU-specific) start.S file, such as: |
| 238 | |
| 239 | - arch/arm/cpu/armv7/start.S |
| 240 | - arch/powerpc/cpu/mpc83xx/start.S |
| 241 | - arch/mips/cpu/start.S |
| 242 | |
| 243 | and so on. From there, three functions are called; the purpose and |
| 244 | limitations of each of these functions are described below. |
Simon Glass | d8711af | 2015-03-03 08:03:00 -0700 | [diff] [blame] | 245 | |
| 246 | lowlevel_init(): |
| 247 | - purpose: essential init to permit execution to reach board_init_f() |
| 248 | - no global_data or BSS |
| 249 | - there is no stack (ARMv7 may have one but it will soon be removed) |
| 250 | - must not set up SDRAM or use console |
| 251 | - must only do the bare minimum to allow execution to continue to |
| 252 | board_init_f() |
| 253 | - this is almost never needed |
| 254 | - return normally from this function |
| 255 | |
| 256 | board_init_f(): |
| 257 | - purpose: set up the machine ready for running board_init_r(): |
| 258 | i.e. SDRAM and serial UART |
| 259 | - global_data is available |
| 260 | - stack is in SRAM |
| 261 | - BSS is not available, so you cannot use global/static variables, |
| 262 | only stack variables and global_data |
| 263 | |
| 264 | Non-SPL-specific notes: |
| 265 | - dram_init() is called to set up DRAM. If already done in SPL this |
| 266 | can do nothing |
| 267 | |
| 268 | SPL-specific notes: |
| 269 | - you can override the entire board_init_f() function with your own |
| 270 | version as needed. |
| 271 | - preloader_console_init() can be called here in extremis |
| 272 | - should set up SDRAM, and anything needed to make the UART work |
| 273 | - these is no need to clear BSS, it will be done by crt0.S |
| 274 | - must return normally from this function (don't call board_init_r() |
| 275 | directly) |
| 276 | |
| 277 | Here the BSS is cleared. For SPL, if CONFIG_SPL_STACK_R is defined, then at |
| 278 | this point the stack and global_data are relocated to below |
| 279 | CONFIG_SPL_STACK_R_ADDR. For non-SPL, U-Boot is relocated to run at the top of |
| 280 | memory. |
| 281 | |
| 282 | board_init_r(): |
| 283 | - purpose: main execution, common code |
| 284 | - global_data is available |
| 285 | - SDRAM is available |
| 286 | - BSS is available, all static/global variables can be used |
| 287 | - execution eventually continues to main_loop() |
| 288 | |
| 289 | Non-SPL-specific notes: |
| 290 | - U-Boot is relocated to the top of memory and is now running from |
| 291 | there. |
| 292 | |
| 293 | SPL-specific notes: |
| 294 | - stack is optionally in SDRAM, if CONFIG_SPL_STACK_R is defined and |
| 295 | CONFIG_SPL_STACK_R_ADDR points into SDRAM |
| 296 | - preloader_console_init() can be called here - typically this is |
| 297 | done by defining CONFIG_SPL_BOARD_INIT and then supplying a |
| 298 | spl_board_init() function containing this call |
| 299 | - loads U-Boot or (in falcon mode) Linux |
| 300 | |
| 301 | |
| 302 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 303 | Configuration Options: |
| 304 | ---------------------- |
| 305 | |
| 306 | Configuration depends on the combination of board and CPU type; all |
| 307 | such information is kept in a configuration file |
| 308 | "include/configs/<board_name>.h". |
| 309 | |
| 310 | Example: For a TQM823L module, all configuration settings are in |
| 311 | "include/configs/TQM823L.h". |
| 312 | |
| 313 | |
wdenk | 1272e23 | 2002-11-10 22:06:23 +0000 | [diff] [blame] | 314 | Many of the options are named exactly as the corresponding Linux |
| 315 | kernel configuration options. The intention is to make it easier to |
| 316 | build a config tool - later. |
| 317 | |
| 318 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 319 | The following options need to be configured: |
| 320 | |
Kim Phillips | 203fee3 | 2007-08-10 13:28:25 -0500 | [diff] [blame] | 321 | - CPU Type: Define exactly one, e.g. CONFIG_MPC85XX. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 322 | |
Kim Phillips | 203fee3 | 2007-08-10 13:28:25 -0500 | [diff] [blame] | 323 | - Board Type: Define exactly one, e.g. CONFIG_MPC8540ADS. |
Wolfgang Denk | 994ad96 | 2006-10-24 14:42:37 +0200 | [diff] [blame] | 324 | |
| 325 | - CPU Daughterboard Type: (if CONFIG_ATSTK1000 is defined) |
Haavard Skinnemoen | 9d5a43f | 2007-11-01 12:44:20 +0100 | [diff] [blame] | 326 | Define exactly one, e.g. CONFIG_ATSTK1002 |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 327 | |
| 328 | - CPU Module Type: (if CONFIG_COGENT is defined) |
| 329 | Define exactly one of |
| 330 | CONFIG_CMA286_60_OLD |
| 331 | --- FIXME --- not tested yet: |
| 332 | CONFIG_CMA286_60, CONFIG_CMA286_21, CONFIG_CMA286_60P, |
| 333 | CONFIG_CMA287_23, CONFIG_CMA287_50 |
| 334 | |
| 335 | - Motherboard Type: (if CONFIG_COGENT is defined) |
| 336 | Define exactly one of |
| 337 | CONFIG_CMA101, CONFIG_CMA102 |
| 338 | |
| 339 | - Motherboard I/O Modules: (if CONFIG_COGENT is defined) |
| 340 | Define one or more of |
| 341 | CONFIG_CMA302 |
| 342 | |
| 343 | - Motherboard Options: (if CONFIG_CMA101 or CONFIG_CMA102 are defined) |
| 344 | Define one or more of |
| 345 | CONFIG_LCD_HEARTBEAT - update a character position on |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 346 | the LCD display every second with |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 347 | a "rotator" |\-/|\-/ |
| 348 | |
Lei Wen | 2001476 | 2011-02-09 18:06:58 +0530 | [diff] [blame] | 349 | - Marvell Family Member |
| 350 | CONFIG_SYS_MVFS - define it if you want to enable |
| 351 | multiple fs option at one time |
| 352 | for marvell soc family |
| 353 | |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 354 | - 8xx CPU Options: (if using an MPC8xx CPU) |
wdenk | 20bddb3 | 2004-09-28 17:59:53 +0000 | [diff] [blame] | 355 | CONFIG_8xx_GCLK_FREQ - deprecated: CPU clock if |
| 356 | get_gclk_freq() cannot work |
wdenk | 9b7f384 | 2003-10-09 20:09:04 +0000 | [diff] [blame] | 357 | e.g. if there is no 32KHz |
| 358 | reference PIT/RTC clock |
wdenk | 20bddb3 | 2004-09-28 17:59:53 +0000 | [diff] [blame] | 359 | CONFIG_8xx_OSCLK - PLL input clock (either EXTCLK |
| 360 | or XTAL/EXTAL) |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 361 | |
wdenk | 20bddb3 | 2004-09-28 17:59:53 +0000 | [diff] [blame] | 362 | - 859/866/885 CPU options: (if using a MPC859 or MPC866 or MPC885 CPU): |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 363 | CONFIG_SYS_8xx_CPUCLK_MIN |
| 364 | CONFIG_SYS_8xx_CPUCLK_MAX |
wdenk | 20bddb3 | 2004-09-28 17:59:53 +0000 | [diff] [blame] | 365 | CONFIG_8xx_CPUCLK_DEFAULT |
wdenk | fde3704 | 2004-01-31 20:06:54 +0000 | [diff] [blame] | 366 | See doc/README.MPC866 |
| 367 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 368 | CONFIG_SYS_MEASURE_CPUCLK |
wdenk | fde3704 | 2004-01-31 20:06:54 +0000 | [diff] [blame] | 369 | |
wdenk | 544e973 | 2004-02-06 23:19:44 +0000 | [diff] [blame] | 370 | Define this to measure the actual CPU clock instead |
| 371 | of relying on the correctness of the configured |
| 372 | values. Mostly useful for board bringup to make sure |
| 373 | the PLL is locked at the intended frequency. Note |
| 374 | that this requires a (stable) reference clock (32 kHz |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 375 | RTC clock or CONFIG_SYS_8XX_XIN) |
wdenk | fde3704 | 2004-01-31 20:06:54 +0000 | [diff] [blame] | 376 | |
Heiko Schocher | 734f027 | 2009-03-12 07:37:15 +0100 | [diff] [blame] | 377 | CONFIG_SYS_DELAYED_ICACHE |
| 378 | |
| 379 | Define this option if you want to enable the |
| 380 | ICache only when Code runs from RAM. |
| 381 | |
Kumar Gala | f4fb90f | 2011-02-18 05:40:54 -0600 | [diff] [blame] | 382 | - 85xx CPU Options: |
York Sun | 2394a0f | 2012-10-08 07:44:30 +0000 | [diff] [blame] | 383 | CONFIG_SYS_PPC64 |
| 384 | |
| 385 | Specifies that the core is a 64-bit PowerPC implementation (implements |
| 386 | the "64" category of the Power ISA). This is necessary for ePAPR |
| 387 | compliance, among other possible reasons. |
| 388 | |
Kumar Gala | f4fb90f | 2011-02-18 05:40:54 -0600 | [diff] [blame] | 389 | CONFIG_SYS_FSL_TBCLK_DIV |
| 390 | |
| 391 | Defines the core time base clock divider ratio compared to the |
| 392 | system clock. On most PQ3 devices this is 8, on newer QorIQ |
| 393 | devices it can be 16 or 32. The ratio varies from SoC to Soc. |
| 394 | |
Kumar Gala | 179b1b2 | 2011-05-20 00:39:21 -0500 | [diff] [blame] | 395 | CONFIG_SYS_FSL_PCIE_COMPAT |
| 396 | |
| 397 | Defines the string to utilize when trying to match PCIe device |
| 398 | tree nodes for the given platform. |
| 399 | |
Prabhakar Kushwaha | a6a3062 | 2012-04-29 23:56:13 +0000 | [diff] [blame] | 400 | CONFIG_SYS_PPC_E500_DEBUG_TLB |
| 401 | |
| 402 | Enables a temporary TLB entry to be used during boot to work |
| 403 | around limitations in e500v1 and e500v2 external debugger |
| 404 | support. This reduces the portions of the boot code where |
| 405 | breakpoints and single stepping do not work. The value of this |
| 406 | symbol should be set to the TLB1 entry to be used for this |
| 407 | purpose. |
| 408 | |
Scott Wood | 8080696 | 2012-08-14 10:14:53 +0000 | [diff] [blame] | 409 | CONFIG_SYS_FSL_ERRATUM_A004510 |
| 410 | |
| 411 | Enables a workaround for erratum A004510. If set, |
| 412 | then CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV and |
| 413 | CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY must be set. |
| 414 | |
| 415 | CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV |
| 416 | CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2 (optional) |
| 417 | |
| 418 | Defines one or two SoC revisions (low 8 bits of SVR) |
| 419 | for which the A004510 workaround should be applied. |
| 420 | |
| 421 | The rest of SVR is either not relevant to the decision |
| 422 | of whether the erratum is present (e.g. p2040 versus |
| 423 | p2041) or is implied by the build target, which controls |
| 424 | whether CONFIG_SYS_FSL_ERRATUM_A004510 is set. |
| 425 | |
| 426 | See Freescale App Note 4493 for more information about |
| 427 | this erratum. |
| 428 | |
Prabhakar Kushwaha | d324f47 | 2013-04-16 13:27:44 +0530 | [diff] [blame] | 429 | CONFIG_A003399_NOR_WORKAROUND |
| 430 | Enables a workaround for IFC erratum A003399. It is only |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 431 | required during NOR boot. |
Prabhakar Kushwaha | d324f47 | 2013-04-16 13:27:44 +0530 | [diff] [blame] | 432 | |
Prabhakar Kushwaha | c4c10d1 | 2014-10-29 22:33:09 +0530 | [diff] [blame] | 433 | CONFIG_A008044_WORKAROUND |
| 434 | Enables a workaround for T1040/T1042 erratum A008044. It is only |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 435 | required during NAND boot and valid for Rev 1.0 SoC revision |
Prabhakar Kushwaha | c4c10d1 | 2014-10-29 22:33:09 +0530 | [diff] [blame] | 436 | |
Scott Wood | 8080696 | 2012-08-14 10:14:53 +0000 | [diff] [blame] | 437 | CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY |
| 438 | |
| 439 | This is the value to write into CCSR offset 0x18600 |
| 440 | according to the A004510 workaround. |
| 441 | |
Priyanka Jain | c73b903 | 2013-07-02 09:21:04 +0530 | [diff] [blame] | 442 | CONFIG_SYS_FSL_DSP_DDR_ADDR |
| 443 | This value denotes start offset of DDR memory which is |
| 444 | connected exclusively to the DSP cores. |
| 445 | |
Priyanka Jain | f81e8b2 | 2013-04-04 09:31:54 +0530 | [diff] [blame] | 446 | CONFIG_SYS_FSL_DSP_M2_RAM_ADDR |
| 447 | This value denotes start offset of M2 memory |
| 448 | which is directly connected to the DSP core. |
| 449 | |
Priyanka Jain | c73b903 | 2013-07-02 09:21:04 +0530 | [diff] [blame] | 450 | CONFIG_SYS_FSL_DSP_M3_RAM_ADDR |
| 451 | This value denotes start offset of M3 memory which is directly |
| 452 | connected to the DSP core. |
| 453 | |
Priyanka Jain | f81e8b2 | 2013-04-04 09:31:54 +0530 | [diff] [blame] | 454 | CONFIG_SYS_FSL_DSP_CCSRBAR_DEFAULT |
| 455 | This value denotes start offset of DSP CCSR space. |
| 456 | |
Priyanka Jain | e9dcaa8 | 2013-12-17 14:25:52 +0530 | [diff] [blame] | 457 | CONFIG_SYS_FSL_SINGLE_SOURCE_CLK |
| 458 | Single Source Clock is clocking mode present in some of FSL SoC's. |
| 459 | In this mode, a single differential clock is used to supply |
| 460 | clocks to the sysclock, ddrclock and usbclock. |
| 461 | |
Aneesh Bansal | 8bcbc27 | 2014-03-18 23:40:26 +0530 | [diff] [blame] | 462 | CONFIG_SYS_CPC_REINIT_F |
| 463 | This CONFIG is defined when the CPC is configured as SRAM at the |
Bin Meng | 7557405 | 2016-02-05 19:30:11 -0800 | [diff] [blame] | 464 | time of U-Boot entry and is required to be re-initialized. |
Aneesh Bansal | 8bcbc27 | 2014-03-18 23:40:26 +0530 | [diff] [blame] | 465 | |
Tang Yuantian | a7364af | 2014-04-17 15:33:46 +0800 | [diff] [blame] | 466 | CONFIG_DEEP_SLEEP |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 467 | Indicates this SoC supports deep sleep feature. If deep sleep is |
Tang Yuantian | a7364af | 2014-04-17 15:33:46 +0800 | [diff] [blame] | 468 | supported, core will start to execute uboot when wakes up. |
| 469 | |
Daniel Schwierzeck | d8a49ca | 2012-04-02 02:57:56 +0000 | [diff] [blame] | 470 | - Generic CPU options: |
York Sun | 021d202 | 2014-05-02 17:28:04 -0700 | [diff] [blame] | 471 | CONFIG_SYS_GENERIC_GLOBAL_DATA |
| 472 | Defines global data is initialized in generic board board_init_f(). |
| 473 | If this macro is defined, global data is created and cleared in |
| 474 | generic board board_init_f(). Without this macro, architecture/board |
| 475 | should initialize global data before calling board_init_f(). |
| 476 | |
Daniel Schwierzeck | d8a49ca | 2012-04-02 02:57:56 +0000 | [diff] [blame] | 477 | CONFIG_SYS_BIG_ENDIAN, CONFIG_SYS_LITTLE_ENDIAN |
| 478 | |
| 479 | Defines the endianess of the CPU. Implementation of those |
| 480 | values is arch specific. |
| 481 | |
York Sun | f062659 | 2013-09-30 09:22:09 -0700 | [diff] [blame] | 482 | CONFIG_SYS_FSL_DDR |
| 483 | Freescale DDR driver in use. This type of DDR controller is |
| 484 | found in mpc83xx, mpc85xx, mpc86xx as well as some ARM core |
| 485 | SoCs. |
| 486 | |
| 487 | CONFIG_SYS_FSL_DDR_ADDR |
| 488 | Freescale DDR memory-mapped register base. |
| 489 | |
| 490 | CONFIG_SYS_FSL_DDR_EMU |
| 491 | Specify emulator support for DDR. Some DDR features such as |
| 492 | deskew training are not available. |
| 493 | |
| 494 | CONFIG_SYS_FSL_DDRC_GEN1 |
| 495 | Freescale DDR1 controller. |
| 496 | |
| 497 | CONFIG_SYS_FSL_DDRC_GEN2 |
| 498 | Freescale DDR2 controller. |
| 499 | |
| 500 | CONFIG_SYS_FSL_DDRC_GEN3 |
| 501 | Freescale DDR3 controller. |
| 502 | |
York Sun | 2896cb7 | 2014-03-27 17:54:47 -0700 | [diff] [blame] | 503 | CONFIG_SYS_FSL_DDRC_GEN4 |
| 504 | Freescale DDR4 controller. |
| 505 | |
York Sun | 461c939 | 2013-09-30 14:20:51 -0700 | [diff] [blame] | 506 | CONFIG_SYS_FSL_DDRC_ARM_GEN3 |
| 507 | Freescale DDR3 controller for ARM-based SoCs. |
| 508 | |
York Sun | f062659 | 2013-09-30 09:22:09 -0700 | [diff] [blame] | 509 | CONFIG_SYS_FSL_DDR1 |
| 510 | Board config to use DDR1. It can be enabled for SoCs with |
| 511 | Freescale DDR1 or DDR2 controllers, depending on the board |
| 512 | implemetation. |
| 513 | |
| 514 | CONFIG_SYS_FSL_DDR2 |
Robert P. J. Day | 8d56db9 | 2016-07-15 13:44:45 -0400 | [diff] [blame] | 515 | Board config to use DDR2. It can be enabled for SoCs with |
York Sun | f062659 | 2013-09-30 09:22:09 -0700 | [diff] [blame] | 516 | Freescale DDR2 or DDR3 controllers, depending on the board |
| 517 | implementation. |
| 518 | |
| 519 | CONFIG_SYS_FSL_DDR3 |
| 520 | Board config to use DDR3. It can be enabled for SoCs with |
York Sun | 2896cb7 | 2014-03-27 17:54:47 -0700 | [diff] [blame] | 521 | Freescale DDR3 or DDR3L controllers. |
| 522 | |
| 523 | CONFIG_SYS_FSL_DDR3L |
| 524 | Board config to use DDR3L. It can be enabled for SoCs with |
| 525 | DDR3L controllers. |
| 526 | |
| 527 | CONFIG_SYS_FSL_DDR4 |
| 528 | Board config to use DDR4. It can be enabled for SoCs with |
| 529 | DDR4 controllers. |
York Sun | f062659 | 2013-09-30 09:22:09 -0700 | [diff] [blame] | 530 | |
Prabhakar Kushwaha | 62908c2 | 2014-01-18 12:28:30 +0530 | [diff] [blame] | 531 | CONFIG_SYS_FSL_IFC_BE |
| 532 | Defines the IFC controller register space as Big Endian |
| 533 | |
| 534 | CONFIG_SYS_FSL_IFC_LE |
| 535 | Defines the IFC controller register space as Little Endian |
| 536 | |
Prabhakar Kushwaha | 950f2f7 | 2014-01-13 11:28:04 +0530 | [diff] [blame] | 537 | CONFIG_SYS_FSL_PBL_PBI |
| 538 | It enables addition of RCW (Power on reset configuration) in built image. |
| 539 | Please refer doc/README.pblimage for more details |
| 540 | |
| 541 | CONFIG_SYS_FSL_PBL_RCW |
| 542 | It adds PBI(pre-boot instructions) commands in u-boot build image. |
| 543 | PBI commands can be used to configure SoC before it starts the execution. |
| 544 | Please refer doc/README.pblimage for more details |
| 545 | |
Prabhakar Kushwaha | 2c27f12 | 2014-04-08 19:13:34 +0530 | [diff] [blame] | 546 | CONFIG_SPL_FSL_PBL |
| 547 | It adds a target to create boot binary having SPL binary in PBI format |
| 548 | concatenated with u-boot binary. |
| 549 | |
York Sun | 29647ab | 2014-02-10 13:59:42 -0800 | [diff] [blame] | 550 | CONFIG_SYS_FSL_DDR_BE |
| 551 | Defines the DDR controller register space as Big Endian |
| 552 | |
| 553 | CONFIG_SYS_FSL_DDR_LE |
| 554 | Defines the DDR controller register space as Little Endian |
| 555 | |
York Sun | 3a0916d | 2014-02-10 13:59:43 -0800 | [diff] [blame] | 556 | CONFIG_SYS_FSL_DDR_SDRAM_BASE_PHY |
| 557 | Physical address from the view of DDR controllers. It is the |
| 558 | same as CONFIG_SYS_DDR_SDRAM_BASE for all Power SoCs. But |
| 559 | it could be different for ARM SoCs. |
| 560 | |
York Sun | c459ae6 | 2014-02-10 13:59:44 -0800 | [diff] [blame] | 561 | CONFIG_SYS_FSL_DDR_INTLV_256B |
| 562 | DDR controller interleaving on 256-byte. This is a special |
| 563 | interleaving mode, handled by Dickens for Freescale layerscape |
| 564 | SoCs with ARM core. |
| 565 | |
York Sun | 79a779b | 2014-08-01 15:51:00 -0700 | [diff] [blame] | 566 | CONFIG_SYS_FSL_DDR_MAIN_NUM_CTRLS |
| 567 | Number of controllers used as main memory. |
| 568 | |
| 569 | CONFIG_SYS_FSL_OTHER_DDR_NUM_CTRLS |
| 570 | Number of controllers used for other than main memory. |
| 571 | |
Prabhakar Kushwaha | 122bcfd | 2015-11-09 16:42:07 +0530 | [diff] [blame] | 572 | CONFIG_SYS_FSL_HAS_DP_DDR |
| 573 | Defines the SoC has DP-DDR used for DPAA. |
| 574 | |
Ruchika Gupta | bb7143b | 2014-09-09 11:50:31 +0530 | [diff] [blame] | 575 | CONFIG_SYS_FSL_SEC_BE |
| 576 | Defines the SEC controller register space as Big Endian |
| 577 | |
| 578 | CONFIG_SYS_FSL_SEC_LE |
| 579 | Defines the SEC controller register space as Little Endian |
| 580 | |
Markus Klotzbuecher | 6e5c19a | 2006-03-24 15:28:02 +0100 | [diff] [blame] | 581 | - Intel Monahans options: |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 582 | CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO |
Markus Klotzbuecher | 6e5c19a | 2006-03-24 15:28:02 +0100 | [diff] [blame] | 583 | |
| 584 | Defines the Monahans run mode to oscillator |
| 585 | ratio. Valid values are 8, 16, 24, 31. The core |
| 586 | frequency is this value multiplied by 13 MHz. |
| 587 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 588 | CONFIG_SYS_MONAHANS_TURBO_RUN_MODE_RATIO |
Wolfgang Denk | ebd3deb | 2006-04-16 10:51:58 +0200 | [diff] [blame] | 589 | |
Markus Klotzbuecher | 6e5c19a | 2006-03-24 15:28:02 +0100 | [diff] [blame] | 590 | Defines the Monahans turbo mode to oscillator |
| 591 | ratio. Valid values are 1 (default if undefined) and |
Wolfgang Denk | ebd3deb | 2006-04-16 10:51:58 +0200 | [diff] [blame] | 592 | 2. The core frequency as calculated above is multiplied |
Markus Klotzbuecher | 6e5c19a | 2006-03-24 15:28:02 +0100 | [diff] [blame] | 593 | by this value. |
Wolfgang Denk | ebd3deb | 2006-04-16 10:51:58 +0200 | [diff] [blame] | 594 | |
Daniel Schwierzeck | d52a623 | 2011-07-27 13:22:39 +0200 | [diff] [blame] | 595 | - MIPS CPU options: |
| 596 | CONFIG_SYS_INIT_SP_OFFSET |
| 597 | |
| 598 | Offset relative to CONFIG_SYS_SDRAM_BASE for initial stack |
| 599 | pointer. This is needed for the temporary stack before |
| 600 | relocation. |
| 601 | |
| 602 | CONFIG_SYS_MIPS_CACHE_MODE |
| 603 | |
| 604 | Cache operation mode for the MIPS CPU. |
| 605 | See also arch/mips/include/asm/mipsregs.h. |
| 606 | Possible values are: |
| 607 | CONF_CM_CACHABLE_NO_WA |
| 608 | CONF_CM_CACHABLE_WA |
| 609 | CONF_CM_UNCACHED |
| 610 | CONF_CM_CACHABLE_NONCOHERENT |
| 611 | CONF_CM_CACHABLE_CE |
| 612 | CONF_CM_CACHABLE_COW |
| 613 | CONF_CM_CACHABLE_CUW |
| 614 | CONF_CM_CACHABLE_ACCELERATED |
| 615 | |
| 616 | CONFIG_SYS_XWAY_EBU_BOOTCFG |
| 617 | |
| 618 | Special option for Lantiq XWAY SoCs for booting from NOR flash. |
| 619 | See also arch/mips/cpu/mips32/start.S. |
| 620 | |
| 621 | CONFIG_XWAY_SWAP_BYTES |
| 622 | |
| 623 | Enable compilation of tools/xway-swap-bytes needed for Lantiq |
| 624 | XWAY SoCs for booting from NOR flash. The U-Boot image needs to |
| 625 | be swapped if a flash programmer is used. |
| 626 | |
Christian Riesch | 48c2d6d | 2012-02-02 00:44:39 +0000 | [diff] [blame] | 627 | - ARM options: |
| 628 | CONFIG_SYS_EXCEPTION_VECTORS_HIGH |
| 629 | |
| 630 | Select high exception vectors of the ARM core, e.g., do not |
| 631 | clear the V bit of the c1 register of CP15. |
| 632 | |
Aneesh V | b8e4080 | 2012-03-08 07:20:19 +0000 | [diff] [blame] | 633 | CONFIG_SYS_THUMB_BUILD |
| 634 | |
| 635 | Use this flag to build U-Boot using the Thumb instruction |
| 636 | set for ARM architectures. Thumb instruction set provides |
| 637 | better code density. For ARM architectures that support |
| 638 | Thumb2 this flag will result in Thumb2 code generated by |
| 639 | GCC. |
| 640 | |
Stephen Warren | c63c350 | 2013-03-04 13:29:40 +0000 | [diff] [blame] | 641 | CONFIG_ARM_ERRATA_716044 |
Stephen Warren | e9d59c9 | 2013-02-26 12:28:27 +0000 | [diff] [blame] | 642 | CONFIG_ARM_ERRATA_742230 |
| 643 | CONFIG_ARM_ERRATA_743622 |
| 644 | CONFIG_ARM_ERRATA_751472 |
Nitin Garg | 245defa | 2014-04-02 08:55:02 -0500 | [diff] [blame] | 645 | CONFIG_ARM_ERRATA_761320 |
Ian Campbell | 363e424 | 2015-09-29 10:27:09 +0100 | [diff] [blame] | 646 | CONFIG_ARM_ERRATA_773022 |
| 647 | CONFIG_ARM_ERRATA_774769 |
| 648 | CONFIG_ARM_ERRATA_794072 |
Stephen Warren | e9d59c9 | 2013-02-26 12:28:27 +0000 | [diff] [blame] | 649 | |
| 650 | If set, the workarounds for these ARM errata are applied early |
| 651 | during U-Boot startup. Note that these options force the |
| 652 | workarounds to be applied; no CPU-type/version detection |
| 653 | exists, unlike the similar options in the Linux kernel. Do not |
| 654 | set these options unless they apply! |
| 655 | |
York Sun | 77a1097 | 2015-03-20 19:28:08 -0700 | [diff] [blame] | 656 | COUNTER_FREQUENCY |
| 657 | Generic timer clock source frequency. |
| 658 | |
| 659 | COUNTER_FREQUENCY_REAL |
| 660 | Generic timer clock source frequency if the real clock is |
| 661 | different from COUNTER_FREQUENCY, and can only be determined |
| 662 | at run time. |
| 663 | |
Nishanth Menon | aa0294e | 2015-03-09 17:11:59 -0500 | [diff] [blame] | 664 | NOTE: The following can be machine specific errata. These |
| 665 | do have ability to provide rudimentary version and machine |
| 666 | specific checks, but expect no product checks. |
Nishanth Menon | 3f44511 | 2015-03-09 17:12:01 -0500 | [diff] [blame] | 667 | CONFIG_ARM_ERRATA_430973 |
Nishanth Menon | 071d6ce | 2015-03-09 17:12:00 -0500 | [diff] [blame] | 668 | CONFIG_ARM_ERRATA_454179 |
Nishanth Menon | 49db62d | 2015-03-09 17:12:02 -0500 | [diff] [blame] | 669 | CONFIG_ARM_ERRATA_621766 |
Nishanth Menon | aa0294e | 2015-03-09 17:11:59 -0500 | [diff] [blame] | 670 | CONFIG_ARM_ERRATA_798870 |
Nishanth Menon | 6e2bd2e | 2015-07-27 16:26:05 -0500 | [diff] [blame] | 671 | CONFIG_ARM_ERRATA_801819 |
Nishanth Menon | aa0294e | 2015-03-09 17:11:59 -0500 | [diff] [blame] | 672 | |
Stephen Warren | 8d1fb31 | 2015-01-19 16:25:52 -0700 | [diff] [blame] | 673 | - Tegra SoC options: |
| 674 | CONFIG_TEGRA_SUPPORT_NON_SECURE |
| 675 | |
| 676 | Support executing U-Boot in non-secure (NS) mode. Certain |
| 677 | impossible actions will be skipped if the CPU is in NS mode, |
| 678 | such as ARM architectural timer initialization. |
| 679 | |
wdenk | 9b7f384 | 2003-10-09 20:09:04 +0000 | [diff] [blame] | 680 | - Linux Kernel Interface: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 681 | CONFIG_CLOCKS_IN_MHZ |
| 682 | |
| 683 | U-Boot stores all clock information in Hz |
| 684 | internally. For binary compatibility with older Linux |
| 685 | kernels (which expect the clocks passed in the |
| 686 | bd_info data to be in MHz) the environment variable |
| 687 | "clocks_in_mhz" can be defined so that U-Boot |
| 688 | converts clock data to MHZ before passing it to the |
| 689 | Linux kernel. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 690 | When CONFIG_CLOCKS_IN_MHZ is defined, a definition of |
Wolfgang Denk | b240aef | 2008-03-26 10:40:12 +0100 | [diff] [blame] | 691 | "clocks_in_mhz=1" is automatically included in the |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 692 | default environment. |
| 693 | |
wdenk | 9b7f384 | 2003-10-09 20:09:04 +0000 | [diff] [blame] | 694 | CONFIG_MEMSIZE_IN_BYTES [relevant for MIPS only] |
| 695 | |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 696 | When transferring memsize parameter to Linux, some versions |
wdenk | 9b7f384 | 2003-10-09 20:09:04 +0000 | [diff] [blame] | 697 | expect it to be in bytes, others in MB. |
| 698 | Define CONFIG_MEMSIZE_IN_BYTES to make it in bytes. |
| 699 | |
Gerald Van Baren | fcd91bb | 2008-06-03 20:34:45 -0400 | [diff] [blame] | 700 | CONFIG_OF_LIBFDT |
Wolfgang Denk | 27a5b0b | 2005-10-13 01:45:54 +0200 | [diff] [blame] | 701 | |
| 702 | New kernel versions are expecting firmware settings to be |
Gerald Van Baren | d6abef4 | 2007-03-31 12:23:51 -0400 | [diff] [blame] | 703 | passed using flattened device trees (based on open firmware |
| 704 | concepts). |
| 705 | |
| 706 | CONFIG_OF_LIBFDT |
| 707 | * New libfdt-based support |
| 708 | * Adds the "fdt" command |
Kim Phillips | 9b46eb6 | 2007-08-10 14:34:14 -0500 | [diff] [blame] | 709 | * The bootm command automatically updates the fdt |
Gerald Van Baren | d6abef4 | 2007-03-31 12:23:51 -0400 | [diff] [blame] | 710 | |
Marcel Ziswiler | b29bc71 | 2009-09-09 21:18:41 +0200 | [diff] [blame] | 711 | OF_CPU - The proper name of the cpus node (only required for |
| 712 | MPC512X and MPC5xxx based boards). |
| 713 | OF_SOC - The proper name of the soc node (only required for |
| 714 | MPC512X and MPC5xxx based boards). |
Wolfgang Denk | 27a5b0b | 2005-10-13 01:45:54 +0200 | [diff] [blame] | 715 | OF_TBCLK - The timebase frequency. |
Kumar Gala | e40c2b5 | 2006-01-11 13:59:02 -0600 | [diff] [blame] | 716 | OF_STDOUT_PATH - The path to the console device |
Wolfgang Denk | 27a5b0b | 2005-10-13 01:45:54 +0200 | [diff] [blame] | 717 | |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 718 | boards with QUICC Engines require OF_QE to set UCC MAC |
| 719 | addresses |
Kim Phillips | 9b46eb6 | 2007-08-10 14:34:14 -0500 | [diff] [blame] | 720 | |
Kumar Gala | 1e26aa5 | 2006-01-11 13:54:17 -0600 | [diff] [blame] | 721 | CONFIG_OF_BOARD_SETUP |
| 722 | |
| 723 | Board code has addition modification that it wants to make |
| 724 | to the flat device tree before handing it off to the kernel |
wdenk | da04a8b | 2004-08-02 23:22:59 +0000 | [diff] [blame] | 725 | |
Simon Glass | 6c0be91 | 2014-10-23 18:58:54 -0600 | [diff] [blame] | 726 | CONFIG_OF_SYSTEM_SETUP |
| 727 | |
| 728 | Other code has addition modification that it wants to make |
| 729 | to the flat device tree before handing it off to the kernel. |
| 730 | This causes ft_system_setup() to be called before booting |
| 731 | the kernel. |
| 732 | |
Matthew McClintock | efae4ca | 2006-06-28 10:41:37 -0500 | [diff] [blame] | 733 | CONFIG_OF_BOOT_CPU |
| 734 | |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 735 | This define fills in the correct boot CPU in the boot |
Matthew McClintock | efae4ca | 2006-06-28 10:41:37 -0500 | [diff] [blame] | 736 | param header, the default value is zero if undefined. |
| 737 | |
Heiko Schocher | ffb293a | 2009-09-23 07:56:08 +0200 | [diff] [blame] | 738 | CONFIG_OF_IDE_FIXUP |
| 739 | |
| 740 | U-Boot can detect if an IDE device is present or not. |
| 741 | If not, and this new config option is activated, U-Boot |
| 742 | removes the ATA node from the DTS before booting Linux, |
| 743 | so the Linux IDE driver does not probe the device and |
| 744 | crash. This is needed for buggy hardware (uc101) where |
| 745 | no pull down resistor is connected to the signal IDE5V_DD7. |
| 746 | |
Igor Grinberg | 0689067 | 2011-07-14 05:45:07 +0000 | [diff] [blame] | 747 | CONFIG_MACH_TYPE [relevant for ARM only][mandatory] |
| 748 | |
| 749 | This setting is mandatory for all boards that have only one |
| 750 | machine type and must be used to specify the machine type |
| 751 | number as it appears in the ARM machine registry |
| 752 | (see http://www.arm.linux.org.uk/developer/machines/). |
| 753 | Only boards that have multiple machine types supported |
| 754 | in a single configuration file and the machine type is |
| 755 | runtime discoverable, do not have to use this setting. |
| 756 | |
Niklaus Giger | 0ab978d | 2008-11-03 22:13:47 +0100 | [diff] [blame] | 757 | - vxWorks boot parameters: |
| 758 | |
| 759 | bootvx constructs a valid bootline using the following |
Bin Meng | fb694b9 | 2015-10-07 20:19:17 -0700 | [diff] [blame] | 760 | environments variables: bootdev, bootfile, ipaddr, netmask, |
| 761 | serverip, gatewayip, hostname, othbootargs. |
Niklaus Giger | 0ab978d | 2008-11-03 22:13:47 +0100 | [diff] [blame] | 762 | It loads the vxWorks image pointed bootfile. |
| 763 | |
Niklaus Giger | 0ab978d | 2008-11-03 22:13:47 +0100 | [diff] [blame] | 764 | Note: If a "bootargs" environment is defined, it will overwride |
| 765 | the defaults discussed just above. |
| 766 | |
Aneesh V | 960f5c0 | 2011-06-16 23:30:47 +0000 | [diff] [blame] | 767 | - Cache Configuration: |
| 768 | CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot |
| 769 | CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot |
| 770 | CONFIG_SYS_L2CACHE_OFF- Do not enable L2 cache in U-Boot |
| 771 | |
Aneesh V | 686a075 | 2011-06-16 23:30:51 +0000 | [diff] [blame] | 772 | - Cache Configuration for ARM: |
| 773 | CONFIG_SYS_L2_PL310 - Enable support for ARM PL310 L2 cache |
| 774 | controller |
| 775 | CONFIG_SYS_PL310_BASE - Physical base address of PL310 |
| 776 | controller register space |
| 777 | |
wdenk | da04a8b | 2004-08-02 23:22:59 +0000 | [diff] [blame] | 778 | - Serial Ports: |
Andreas Engel | 0813b12 | 2008-09-08 14:30:53 +0200 | [diff] [blame] | 779 | CONFIG_PL010_SERIAL |
wdenk | da04a8b | 2004-08-02 23:22:59 +0000 | [diff] [blame] | 780 | |
| 781 | Define this if you want support for Amba PrimeCell PL010 UARTs. |
| 782 | |
Andreas Engel | 0813b12 | 2008-09-08 14:30:53 +0200 | [diff] [blame] | 783 | CONFIG_PL011_SERIAL |
wdenk | da04a8b | 2004-08-02 23:22:59 +0000 | [diff] [blame] | 784 | |
| 785 | Define this if you want support for Amba PrimeCell PL011 UARTs. |
| 786 | |
| 787 | CONFIG_PL011_CLOCK |
| 788 | |
| 789 | If you have Amba PrimeCell PL011 UARTs, set this variable to |
| 790 | the clock speed of the UARTs. |
| 791 | |
| 792 | CONFIG_PL01x_PORTS |
| 793 | |
| 794 | If you have Amba PrimeCell PL010 or PL011 UARTs on your board, |
| 795 | define this to a list of base addresses for each (supported) |
| 796 | port. See e.g. include/configs/versatile.h |
| 797 | |
Karicheri, Muralidharan | cbc0888 | 2014-04-09 15:38:46 -0400 | [diff] [blame] | 798 | CONFIG_SERIAL_HW_FLOW_CONTROL |
| 799 | |
| 800 | Define this variable to enable hw flow control in serial driver. |
| 801 | Current user of this option is drivers/serial/nsl16550.c driver |
wdenk | da04a8b | 2004-08-02 23:22:59 +0000 | [diff] [blame] | 802 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 803 | - Console Interface: |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 804 | Depending on board, define exactly one serial port |
| 805 | (like CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2, |
| 806 | CONFIG_8xx_CONS_SCC1, ...), or switch off the serial |
| 807 | console by defining CONFIG_8xx_CONS_NONE |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 808 | |
| 809 | Note: if CONFIG_8xx_CONS_NONE is defined, the serial |
| 810 | port routines must be defined elsewhere |
| 811 | (i.e. serial_init(), serial_getc(), ...) |
| 812 | |
| 813 | CONFIG_CFB_CONSOLE |
| 814 | Enables console device for a color framebuffer. Needs following |
Wolfgang Denk | f6e50a4 | 2011-12-07 12:19:20 +0000 | [diff] [blame] | 815 | defines (cf. smiLynxEM, i8042) |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 816 | VIDEO_FB_LITTLE_ENDIAN graphic memory organisation |
| 817 | (default big endian) |
| 818 | VIDEO_HW_RECTFILL graphic chip supports |
| 819 | rectangle fill |
| 820 | (cf. smiLynxEM) |
| 821 | VIDEO_HW_BITBLT graphic chip supports |
| 822 | bit-blit (cf. smiLynxEM) |
| 823 | VIDEO_VISIBLE_COLS visible pixel columns |
| 824 | (cols=pitch) |
wdenk | 544e973 | 2004-02-06 23:19:44 +0000 | [diff] [blame] | 825 | VIDEO_VISIBLE_ROWS visible pixel rows |
| 826 | VIDEO_PIXEL_SIZE bytes per pixel |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 827 | VIDEO_DATA_FORMAT graphic data format |
| 828 | (0-5, cf. cfb_console.c) |
wdenk | 544e973 | 2004-02-06 23:19:44 +0000 | [diff] [blame] | 829 | VIDEO_FB_ADRS framebuffer address |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 830 | VIDEO_KBD_INIT_FCT keyboard int fct |
Simon Glass | eaba37e | 2015-11-11 10:05:47 -0700 | [diff] [blame] | 831 | (i.e. rx51_kp_init()) |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 832 | VIDEO_TSTC_FCT test char fct |
Simon Glass | eaba37e | 2015-11-11 10:05:47 -0700 | [diff] [blame] | 833 | (i.e. rx51_kp_tstc) |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 834 | VIDEO_GETC_FCT get char fct |
Simon Glass | eaba37e | 2015-11-11 10:05:47 -0700 | [diff] [blame] | 835 | (i.e. rx51_kp_getc) |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 836 | CONFIG_VIDEO_LOGO display Linux logo in |
| 837 | upper left corner |
wdenk | 9dd2b88 | 2002-12-03 21:28:10 +0000 | [diff] [blame] | 838 | CONFIG_VIDEO_BMP_LOGO use bmp_logo.h instead of |
| 839 | linux_logo.h for logo. |
| 840 | Requires CONFIG_VIDEO_LOGO |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 841 | CONFIG_CONSOLE_EXTRA_INFO |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 842 | additional board info beside |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 843 | the logo |
Tim Harvey | 9889946 | 2016-05-24 14:59:59 -0700 | [diff] [blame] | 844 | CONFIG_HIDE_LOGO_VERSION |
| 845 | do not display bootloader |
| 846 | version string |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 847 | |
Pali Rohár | 4a57da3 | 2012-10-19 13:30:09 +0000 | [diff] [blame] | 848 | When CONFIG_CFB_CONSOLE_ANSI is defined, console will support |
| 849 | a limited number of ANSI escape sequences (cursor control, |
| 850 | erase functions and limited graphics rendition control). |
| 851 | |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 852 | When CONFIG_CFB_CONSOLE is defined, video console is |
| 853 | default i/o. Serial console can be forced with |
| 854 | environment 'console=serial'. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 855 | |
wdenk | 1ebf41e | 2004-01-02 14:00:00 +0000 | [diff] [blame] | 856 | When CONFIG_SILENT_CONSOLE is defined, all console |
| 857 | messages (by U-Boot and Linux!) can be silenced with |
| 858 | the "silent" environment variable. See |
| 859 | doc/README.silent for more information. |
wdenk | 3da587e | 2003-10-19 23:22:11 +0000 | [diff] [blame] | 860 | |
Heiko Schocher | 6275956 | 2013-10-22 11:06:06 +0200 | [diff] [blame] | 861 | CONFIG_SYS_CONSOLE_BG_COL: define the backgroundcolor, default |
| 862 | is 0x00. |
| 863 | CONFIG_SYS_CONSOLE_FG_COL: define the foregroundcolor, default |
| 864 | is 0xa0. |
| 865 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 866 | - Console Baudrate: |
| 867 | CONFIG_BAUDRATE - in bps |
| 868 | Select one of the baudrates listed in |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 869 | CONFIG_SYS_BAUDRATE_TABLE, see below. |
| 870 | CONFIG_SYS_BRGCLK_PRESCALE, baudrate prescale |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 871 | |
Heiko Schocher | 327480a | 2009-01-30 12:55:38 +0100 | [diff] [blame] | 872 | - Console Rx buffer length |
| 873 | With CONFIG_SYS_SMC_RXBUFLEN it is possible to define |
| 874 | the maximum receive buffer length for the SMC. |
Heiko Schocher | 362447f | 2009-02-10 09:31:47 +0100 | [diff] [blame] | 875 | This option is actual only for 82xx and 8xx possible. |
Heiko Schocher | 327480a | 2009-01-30 12:55:38 +0100 | [diff] [blame] | 876 | If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE |
| 877 | must be defined, to setup the maximum idle timeout for |
| 878 | the SMC. |
| 879 | |
Graeme Russ | 3c28f48 | 2011-09-01 00:48:27 +0000 | [diff] [blame] | 880 | - Pre-Console Buffer: |
Wolfgang Denk | d590fb1 | 2011-10-07 09:58:21 +0200 | [diff] [blame] | 881 | Prior to the console being initialised (i.e. serial UART |
| 882 | initialised etc) all console output is silently discarded. |
| 883 | Defining CONFIG_PRE_CONSOLE_BUFFER will cause U-Boot to |
| 884 | buffer any console messages prior to the console being |
| 885 | initialised to a buffer of size CONFIG_PRE_CON_BUF_SZ |
| 886 | bytes located at CONFIG_PRE_CON_BUF_ADDR. The buffer is |
| 887 | a circular buffer, so if more than CONFIG_PRE_CON_BUF_SZ |
Wolfgang Denk | 23f7848 | 2011-10-09 21:06:34 +0200 | [diff] [blame] | 888 | bytes are output before the console is initialised, the |
Wolfgang Denk | d590fb1 | 2011-10-07 09:58:21 +0200 | [diff] [blame] | 889 | earlier bytes are discarded. |
Graeme Russ | 3c28f48 | 2011-09-01 00:48:27 +0000 | [diff] [blame] | 890 | |
Hans de Goede | e355da0 | 2015-05-05 13:13:36 +0200 | [diff] [blame] | 891 | Note that when printing the buffer a copy is made on the |
| 892 | stack so CONFIG_PRE_CON_BUF_SZ must fit on the stack. |
| 893 | |
Wolfgang Denk | d590fb1 | 2011-10-07 09:58:21 +0200 | [diff] [blame] | 894 | 'Sane' compilers will generate smaller code if |
| 895 | CONFIG_PRE_CON_BUF_SZ is a power of 2 |
Graeme Russ | 3c28f48 | 2011-09-01 00:48:27 +0000 | [diff] [blame] | 896 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 897 | - Autoboot Command: |
| 898 | CONFIG_BOOTCOMMAND |
| 899 | Only needed when CONFIG_BOOTDELAY is enabled; |
| 900 | define a command string that is automatically executed |
| 901 | when no character is read on the console interface |
| 902 | within "Boot Delay" after reset. |
| 903 | |
| 904 | CONFIG_BOOTARGS |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 905 | This can be used to pass arguments to the bootm |
| 906 | command. The value of CONFIG_BOOTARGS goes into the |
| 907 | environment value "bootargs". |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 908 | |
| 909 | CONFIG_RAMBOOT and CONFIG_NFSBOOT |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 910 | The value of these goes into the environment as |
| 911 | "ramboot" and "nfsboot" respectively, and can be used |
| 912 | as a convenience, when switching between booting from |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 913 | RAM and NFS. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 914 | |
Heiko Schocher | 040c5c3 | 2013-11-04 14:04:59 +0100 | [diff] [blame] | 915 | - Bootcount: |
| 916 | CONFIG_BOOTCOUNT_LIMIT |
| 917 | Implements a mechanism for detecting a repeating reboot |
| 918 | cycle, see: |
| 919 | http://www.denx.de/wiki/view/DULG/UBootBootCountLimit |
| 920 | |
| 921 | CONFIG_BOOTCOUNT_ENV |
| 922 | If no softreset save registers are found on the hardware |
| 923 | "bootcount" is stored in the environment. To prevent a |
| 924 | saveenv on all reboots, the environment variable |
| 925 | "upgrade_available" is used. If "upgrade_available" is |
| 926 | 0, "bootcount" is always 0, if "upgrade_available" is |
| 927 | 1 "bootcount" is incremented in the environment. |
| 928 | So the Userspace Applikation must set the "upgrade_available" |
| 929 | and "bootcount" variable to 0, if a boot was successfully. |
| 930 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 931 | - Pre-Boot Commands: |
| 932 | CONFIG_PREBOOT |
| 933 | |
| 934 | When this option is #defined, the existence of the |
| 935 | environment variable "preboot" will be checked |
| 936 | immediately before starting the CONFIG_BOOTDELAY |
| 937 | countdown and/or running the auto-boot command resp. |
| 938 | entering interactive mode. |
| 939 | |
| 940 | This feature is especially useful when "preboot" is |
| 941 | automatically generated or modified. For an example |
| 942 | see the LWMON board specific code: here "preboot" is |
| 943 | modified when the user holds down a certain |
| 944 | combination of keys on the (special) keyboard when |
| 945 | booting the systems |
| 946 | |
| 947 | - Serial Download Echo Mode: |
| 948 | CONFIG_LOADS_ECHO |
| 949 | If defined to 1, all characters received during a |
| 950 | serial download (using the "loads" command) are |
| 951 | echoed back. This might be needed by some terminal |
| 952 | emulations (like "cu"), but may as well just take |
| 953 | time on others. This setting #define's the initial |
| 954 | value of the "loads_echo" environment variable. |
| 955 | |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 956 | - Kgdb Serial Baudrate: (if CONFIG_CMD_KGDB is defined) |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 957 | CONFIG_KGDB_BAUDRATE |
| 958 | Select one of the baudrates listed in |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 959 | CONFIG_SYS_BAUDRATE_TABLE, see below. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 960 | |
| 961 | - Monitor Functions: |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 962 | Monitor commands can be included or excluded |
| 963 | from the build by using the #include files |
Stephen Warren | 963a7cf | 2012-08-05 16:07:19 +0000 | [diff] [blame] | 964 | <config_cmd_all.h> and #undef'ing unwanted |
Joe Hershberger | 5a9d7f1 | 2015-06-22 16:15:30 -0500 | [diff] [blame] | 965 | commands, or adding #define's for wanted commands. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 966 | |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 967 | The default command configuration includes all commands |
| 968 | except those marked below with a "*". |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 969 | |
Marek Vasut | c4d8a1b | 2014-03-05 19:58:39 +0100 | [diff] [blame] | 970 | CONFIG_CMD_AES AES 128 CBC encrypt/decrypt |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 971 | CONFIG_CMD_ASKENV * ask for env variable |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 972 | CONFIG_CMD_BDI bdinfo |
| 973 | CONFIG_CMD_BEDBUG * Include BedBug Debugger |
| 974 | CONFIG_CMD_BMP * BMP support |
| 975 | CONFIG_CMD_BSP * Board specific commands |
| 976 | CONFIG_CMD_BOOTD bootd |
Tom Rini | 5ce62cd | 2014-08-14 06:42:36 -0400 | [diff] [blame] | 977 | CONFIG_CMD_BOOTI * ARM64 Linux kernel Image support |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 978 | CONFIG_CMD_CACHE * icache, dcache |
Michal Simek | a0d2802 | 2013-11-21 13:39:02 -0800 | [diff] [blame] | 979 | CONFIG_CMD_CLK * clock command support |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 980 | CONFIG_CMD_CONSOLE coninfo |
Mike Frysinger | 321ab9e | 2010-12-21 14:19:51 -0500 | [diff] [blame] | 981 | CONFIG_CMD_CRC32 * crc32 |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 982 | CONFIG_CMD_DATE * support for RTC, date/time... |
| 983 | CONFIG_CMD_DHCP * DHCP support |
| 984 | CONFIG_CMD_DIAG * Diagnostics |
Peter Tyser | 1525804 | 2008-12-17 16:36:22 -0600 | [diff] [blame] | 985 | CONFIG_CMD_DS4510 * ds4510 I2C gpio commands |
| 986 | CONFIG_CMD_DS4510_INFO * ds4510 I2C info command |
| 987 | CONFIG_CMD_DS4510_MEM * ds4510 I2C eeprom/sram commansd |
| 988 | CONFIG_CMD_DS4510_RST * ds4510 I2C rst command |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 989 | CONFIG_CMD_DTT * Digital Therm and Thermostat |
| 990 | CONFIG_CMD_ECHO echo arguments |
Peter Tyser | 0deafa2 | 2009-10-25 15:12:56 -0500 | [diff] [blame] | 991 | CONFIG_CMD_EDITENV edit env variable |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 992 | CONFIG_CMD_EEPROM * EEPROM read/write support |
Nikita Kiryanov | 37dda1c | 2016-04-16 17:55:03 +0300 | [diff] [blame] | 993 | CONFIG_CMD_EEPROM_LAYOUT* EEPROM layout aware commands |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 994 | CONFIG_CMD_ELF * bootelf, bootvx |
Joe Hershberger | 1b0d551 | 2012-12-11 22:16:25 -0600 | [diff] [blame] | 995 | CONFIG_CMD_ENV_CALLBACK * display details about env callbacks |
Joe Hershberger | a2d62b7 | 2012-12-11 22:16:33 -0600 | [diff] [blame] | 996 | CONFIG_CMD_ENV_FLAGS * display details about env flags |
Andrew Ruder | 9446340 | 2013-10-22 19:07:34 -0500 | [diff] [blame] | 997 | CONFIG_CMD_ENV_EXISTS * check existence of env variable |
Mike Frysinger | f3ddf20 | 2010-12-26 23:09:45 -0500 | [diff] [blame] | 998 | CONFIG_CMD_EXPORTENV * export the environment |
Stephen Warren | 4f8662d | 2012-10-22 06:43:50 +0000 | [diff] [blame] | 999 | CONFIG_CMD_EXT2 * ext2 command support |
| 1000 | CONFIG_CMD_EXT4 * ext4 command support |
Stephen Warren | 3d5a388 | 2014-01-24 20:46:37 -0700 | [diff] [blame] | 1001 | CONFIG_CMD_FS_GENERIC * filesystem commands (e.g. load, ls) |
| 1002 | that work for multiple fs types |
Christian Gmeiner | 9f9eec3 | 2014-11-12 14:35:04 +0100 | [diff] [blame] | 1003 | CONFIG_CMD_FS_UUID * Look up a filesystem UUID |
Mike Frysinger | 78dcaf4 | 2009-01-28 19:08:14 -0500 | [diff] [blame] | 1004 | CONFIG_CMD_SAVEENV saveenv |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 1005 | CONFIG_CMD_FDC * Floppy Disk Support |
Stephen Warren | 4f8662d | 2012-10-22 06:43:50 +0000 | [diff] [blame] | 1006 | CONFIG_CMD_FAT * FAT command support |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 1007 | CONFIG_CMD_FLASH flinfo, erase, protect |
| 1008 | CONFIG_CMD_FPGA FPGA device initialization support |
Vincent Stehlé | a618f2b | 2013-06-20 18:14:22 +0200 | [diff] [blame] | 1009 | CONFIG_CMD_FUSE * Device fuse support |
Anton Staaf | d1390c8 | 2012-12-05 14:46:29 +0000 | [diff] [blame] | 1010 | CONFIG_CMD_GETTIME * Get time since boot |
Mike Frysinger | 2ed0241 | 2010-12-26 23:32:22 -0500 | [diff] [blame] | 1011 | CONFIG_CMD_GO * the 'go' command (exec code) |
Kim Phillips | f0c9d53 | 2011-04-05 07:15:14 +0000 | [diff] [blame] | 1012 | CONFIG_CMD_GREPENV * search environment |
Simon Glass | 058bb8d | 2012-12-05 14:46:38 +0000 | [diff] [blame] | 1013 | CONFIG_CMD_HASH * calculate hash / digest |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 1014 | CONFIG_CMD_I2C * I2C serial bus support |
| 1015 | CONFIG_CMD_IDE * IDE harddisk support |
| 1016 | CONFIG_CMD_IMI iminfo |
Vipin Kumar | 3df41b1 | 2012-12-16 22:32:48 +0000 | [diff] [blame] | 1017 | CONFIG_CMD_IMLS List all images found in NOR flash |
Vincent Stehlé | a618f2b | 2013-06-20 18:14:22 +0200 | [diff] [blame] | 1018 | CONFIG_CMD_IMLS_NAND * List all images found in NAND flash |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 1019 | CONFIG_CMD_IMMAP * IMMR dump support |
Simon Glass | 4dc47ca | 2014-06-11 23:29:41 -0600 | [diff] [blame] | 1020 | CONFIG_CMD_IOTRACE * I/O tracing for debugging |
Mike Frysinger | f3ddf20 | 2010-12-26 23:09:45 -0500 | [diff] [blame] | 1021 | CONFIG_CMD_IMPORTENV * import an environment |
Joe Hershberger | 0fd32d7 | 2012-10-03 11:15:51 +0000 | [diff] [blame] | 1022 | CONFIG_CMD_INI * import data from an ini file into the env |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 1023 | CONFIG_CMD_IRQ * irqinfo |
| 1024 | CONFIG_CMD_ITEST Integer/string test of 2 values |
| 1025 | CONFIG_CMD_JFFS2 * JFFS2 Support |
| 1026 | CONFIG_CMD_KGDB * kgdb |
Vincent Stehlé | a618f2b | 2013-06-20 18:14:22 +0200 | [diff] [blame] | 1027 | CONFIG_CMD_LDRINFO * ldrinfo (display Blackfin loader) |
Joe Hershberger | b35a3a6 | 2012-05-23 08:00:12 +0000 | [diff] [blame] | 1028 | CONFIG_CMD_LINK_LOCAL * link-local IP address auto-configuration |
| 1029 | (169.254.*.*) |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 1030 | CONFIG_CMD_LOADB loadb |
| 1031 | CONFIG_CMD_LOADS loads |
Vincent Stehlé | a618f2b | 2013-06-20 18:14:22 +0200 | [diff] [blame] | 1032 | CONFIG_CMD_MD5SUM * print md5 message digest |
Robin Getz | 93d6cb0 | 2009-07-27 00:07:59 -0400 | [diff] [blame] | 1033 | (requires CONFIG_CMD_MEMORY and CONFIG_MD5) |
Simon Glass | eacd14f | 2012-11-30 13:01:20 +0000 | [diff] [blame] | 1034 | CONFIG_CMD_MEMINFO * Display detailed memory information |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 1035 | CONFIG_CMD_MEMORY md, mm, nm, mw, cp, cmp, crc, base, |
Wolfgang Denk | 9d00928 | 2013-03-08 10:51:32 +0000 | [diff] [blame] | 1036 | loop, loopw |
Vincent Stehlé | a618f2b | 2013-06-20 18:14:22 +0200 | [diff] [blame] | 1037 | CONFIG_CMD_MEMTEST * mtest |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 1038 | CONFIG_CMD_MISC Misc functions like sleep etc |
| 1039 | CONFIG_CMD_MMC * MMC memory mapped support |
| 1040 | CONFIG_CMD_MII * MII utility commands |
Stefan Roese | b1423dd | 2009-03-19 13:30:36 +0100 | [diff] [blame] | 1041 | CONFIG_CMD_MTDPARTS * MTD partition support |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 1042 | CONFIG_CMD_NAND * NAND support |
| 1043 | CONFIG_CMD_NET bootp, tftpboot, rarpboot |
Vincent Stehlé | a618f2b | 2013-06-20 18:14:22 +0200 | [diff] [blame] | 1044 | CONFIG_CMD_NFS NFS support |
Peter Tyser | 9902e42 | 2008-12-17 16:36:21 -0600 | [diff] [blame] | 1045 | CONFIG_CMD_PCA953X * PCA953x I2C gpio commands |
Wolfgang Denk | 092ae95 | 2011-10-26 10:21:21 +0000 | [diff] [blame] | 1046 | CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 1047 | CONFIG_CMD_PCI * pciinfo |
| 1048 | CONFIG_CMD_PCMCIA * PCMCIA support |
| 1049 | CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network |
| 1050 | host |
| 1051 | CONFIG_CMD_PORTIO * Port I/O |
Kenneth Waters | c889fb4 | 2012-12-05 14:46:30 +0000 | [diff] [blame] | 1052 | CONFIG_CMD_READ * Read raw data from partition |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 1053 | CONFIG_CMD_REGINFO * Register dump |
| 1054 | CONFIG_CMD_RUN run command in env variable |
Simon Glass | bf6ce79 | 2012-12-26 09:53:36 +0000 | [diff] [blame] | 1055 | CONFIG_CMD_SANDBOX * sb command to access sandbox features |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 1056 | CONFIG_CMD_SAVES * save S record dump |
Simon Glass | 8706b81 | 2016-05-01 11:36:02 -0600 | [diff] [blame] | 1057 | CONFIG_SCSI * SCSI Support |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 1058 | CONFIG_CMD_SDRAM * print SDRAM configuration information |
| 1059 | (requires CONFIG_CMD_I2C) |
| 1060 | CONFIG_CMD_SETGETDCR Support for DCR Register access |
| 1061 | (4xx only) |
Eric Nelson | 97f5f8f | 2012-01-31 10:52:08 -0700 | [diff] [blame] | 1062 | CONFIG_CMD_SF * Read/write/erase SPI NOR flash |
Vincent Stehlé | a618f2b | 2013-06-20 18:14:22 +0200 | [diff] [blame] | 1063 | CONFIG_CMD_SHA1SUM * print sha1 memory digest |
Robin Getz | 93d6cb0 | 2009-07-27 00:07:59 -0400 | [diff] [blame] | 1064 | (requires CONFIG_CMD_MEMORY) |
Bob Liu | a671b70 | 2013-02-05 19:05:41 +0800 | [diff] [blame] | 1065 | CONFIG_CMD_SOFTSWITCH * Soft switch setting command for BF60x |
Wolfgang Denk | 85c25df | 2009-04-01 23:34:12 +0200 | [diff] [blame] | 1066 | CONFIG_CMD_SOURCE "source" command Support |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 1067 | CONFIG_CMD_SPI * SPI serial bus support |
Luca Ceresoli | 7aa81a4 | 2011-05-17 00:03:40 +0000 | [diff] [blame] | 1068 | CONFIG_CMD_TFTPSRV * TFTP transfer in server mode |
Simon Glass | 6a398d2 | 2011-10-24 18:00:07 +0000 | [diff] [blame] | 1069 | CONFIG_CMD_TFTPPUT * TFTP put command (upload) |
Joe Hershberger | 59f3f52 | 2012-10-03 12:14:57 +0000 | [diff] [blame] | 1070 | CONFIG_CMD_TIME * run command and report execution time (ARM specific) |
| 1071 | CONFIG_CMD_TIMER * access to the system tick timer |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 1072 | CONFIG_CMD_USB * USB support |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 1073 | CONFIG_CMD_CDP * Cisco Discover Protocol support |
Marek Vasut | 7172939 | 2012-03-31 07:47:16 +0000 | [diff] [blame] | 1074 | CONFIG_CMD_MFSL * Microblaze FSL support |
Vincent Stehlé | a618f2b | 2013-06-20 18:14:22 +0200 | [diff] [blame] | 1075 | CONFIG_CMD_XIMG Load part of Multi Image |
Przemyslaw Marczak | 2eb40ee | 2014-04-02 10:20:05 +0200 | [diff] [blame] | 1076 | CONFIG_CMD_UUID * Generate random UUID or GUID string |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1077 | |
| 1078 | EXAMPLE: If you want all functions except of network |
| 1079 | support you can write: |
| 1080 | |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 1081 | #include "config_cmd_all.h" |
| 1082 | #undef CONFIG_CMD_NET |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1083 | |
Gerald Van Baren | d6abef4 | 2007-03-31 12:23:51 -0400 | [diff] [blame] | 1084 | Other Commands: |
| 1085 | fdt (flattened device tree) command: CONFIG_OF_LIBFDT |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1086 | |
| 1087 | Note: Don't enable the "icache" and "dcache" commands |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 1088 | (configuration option CONFIG_CMD_CACHE) unless you know |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 1089 | what you (and your U-Boot users) are doing. Data |
| 1090 | cache cannot be enabled on systems like the 8xx or |
| 1091 | 8260 (where accesses to the IMMR region must be |
| 1092 | uncached), and it cannot be disabled on all other |
| 1093 | systems where we (mis-) use the data cache to hold an |
| 1094 | initial stack and some data. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1095 | |
| 1096 | |
| 1097 | XXX - this list needs to get updated! |
| 1098 | |
Simon Glass | aa34ef2 | 2016-03-13 19:07:28 -0600 | [diff] [blame] | 1099 | - Removal of commands |
| 1100 | If no commands are needed to boot, you can disable |
| 1101 | CONFIG_CMDLINE to remove them. In this case, the command line |
| 1102 | will not be available, and when U-Boot wants to execute the |
| 1103 | boot command (on start-up) it will call board_run_command() |
| 1104 | instead. This can reduce image size significantly for very |
| 1105 | simple boot procedures. |
| 1106 | |
Wolfgang Denk | 2aceea1 | 2013-03-23 23:50:31 +0000 | [diff] [blame] | 1107 | - Regular expression support: |
| 1108 | CONFIG_REGEX |
Wolfgang Denk | ec7fbf5 | 2013-10-04 17:43:24 +0200 | [diff] [blame] | 1109 | If this variable is defined, U-Boot is linked against |
| 1110 | the SLRE (Super Light Regular Expression) library, |
| 1111 | which adds regex support to some commands, as for |
| 1112 | example "env grep" and "setexpr". |
Wolfgang Denk | 2aceea1 | 2013-03-23 23:50:31 +0000 | [diff] [blame] | 1113 | |
Simon Glass | 3d68644 | 2011-10-15 05:48:20 +0000 | [diff] [blame] | 1114 | - Device tree: |
| 1115 | CONFIG_OF_CONTROL |
| 1116 | If this variable is defined, U-Boot will use a device tree |
| 1117 | to configure its devices, instead of relying on statically |
| 1118 | compiled #defines in the board file. This option is |
| 1119 | experimental and only available on a few boards. The device |
| 1120 | tree is available in the global data as gd->fdt_blob. |
| 1121 | |
Simon Glass | 5cb34db | 2011-10-24 19:15:31 +0000 | [diff] [blame] | 1122 | U-Boot needs to get its device tree from somewhere. This can |
| 1123 | be done using one of the two options below: |
Simon Glass | 38d6b8d | 2011-10-15 05:48:21 +0000 | [diff] [blame] | 1124 | |
| 1125 | CONFIG_OF_EMBED |
| 1126 | If this variable is defined, U-Boot will embed a device tree |
| 1127 | binary in its image. This device tree file should be in the |
| 1128 | board directory and called <soc>-<board>.dts. The binary file |
| 1129 | is then picked up in board_init_f() and made available through |
| 1130 | the global data structure as gd->blob. |
Simon Glass | 3d68644 | 2011-10-15 05:48:20 +0000 | [diff] [blame] | 1131 | |
Simon Glass | 5cb34db | 2011-10-24 19:15:31 +0000 | [diff] [blame] | 1132 | CONFIG_OF_SEPARATE |
| 1133 | If this variable is defined, U-Boot will build a device tree |
| 1134 | binary. It will be called u-boot.dtb. Architecture-specific |
| 1135 | code will locate it at run-time. Generally this works by: |
| 1136 | |
| 1137 | cat u-boot.bin u-boot.dtb >image.bin |
| 1138 | |
| 1139 | and in fact, U-Boot does this for you, creating a file called |
| 1140 | u-boot-dtb.bin which is useful in the common case. You can |
| 1141 | still use the individual files if you need something more |
| 1142 | exotic. |
| 1143 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1144 | - Watchdog: |
| 1145 | CONFIG_WATCHDOG |
| 1146 | If this variable is defined, it enables watchdog |
Detlev Zundel | 6aa4d7b | 2011-04-27 05:25:59 +0000 | [diff] [blame] | 1147 | support for the SoC. There must be support in the SoC |
| 1148 | specific code for a watchdog. For the 8xx and 8260 |
| 1149 | CPUs, the SIU Watchdog feature is enabled in the SYPCR |
| 1150 | register. When supported for a specific SoC is |
| 1151 | available, then no further board specific code should |
| 1152 | be needed to use it. |
| 1153 | |
| 1154 | CONFIG_HW_WATCHDOG |
| 1155 | When using a watchdog circuitry external to the used |
| 1156 | SoC, then define this variable and provide board |
| 1157 | specific code for the "hw_watchdog_reset" function. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1158 | |
Heiko Schocher | 735326c | 2015-01-21 08:38:22 +0100 | [diff] [blame] | 1159 | CONFIG_AT91_HW_WDT_TIMEOUT |
| 1160 | specify the timeout in seconds. default 2 seconds. |
| 1161 | |
stroese | b9c17c5 | 2003-04-04 15:53:41 +0000 | [diff] [blame] | 1162 | - U-Boot Version: |
| 1163 | CONFIG_VERSION_VARIABLE |
| 1164 | If this variable is defined, an environment variable |
| 1165 | named "ver" is created by U-Boot showing the U-Boot |
| 1166 | version as printed by the "version" command. |
Benoît Thébaudeau | ce9a155 | 2012-08-13 15:01:14 +0200 | [diff] [blame] | 1167 | Any change to this variable will be reverted at the |
| 1168 | next reset. |
stroese | b9c17c5 | 2003-04-04 15:53:41 +0000 | [diff] [blame] | 1169 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1170 | - Real-Time Clock: |
| 1171 | |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 1172 | When CONFIG_CMD_DATE is selected, the type of the RTC |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1173 | has to be selected, too. Define exactly one of the |
| 1174 | following options: |
| 1175 | |
| 1176 | CONFIG_RTC_MPC8xx - use internal RTC of MPC8xx |
| 1177 | CONFIG_RTC_PCF8563 - use Philips PCF8563 RTC |
Fabio Estevam | 3f8d178 | 2011-10-24 06:44:15 +0000 | [diff] [blame] | 1178 | CONFIG_RTC_MC13XXX - use MC13783 or MC13892 RTC |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1179 | CONFIG_RTC_MC146818 - use MC146818 RTC |
wdenk | 1fe2c70 | 2003-03-06 21:55:29 +0000 | [diff] [blame] | 1180 | CONFIG_RTC_DS1307 - use Maxim, Inc. DS1307 RTC |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1181 | CONFIG_RTC_DS1337 - use Maxim, Inc. DS1337 RTC |
wdenk | 0893c47 | 2003-05-20 14:25:27 +0000 | [diff] [blame] | 1182 | CONFIG_RTC_DS1338 - use Maxim, Inc. DS1338 RTC |
Markus Niebel | 90491f2 | 2014-07-21 11:06:16 +0200 | [diff] [blame] | 1183 | CONFIG_RTC_DS1339 - use Maxim, Inc. DS1339 RTC |
wdenk | ef5fe75 | 2003-03-12 10:41:04 +0000 | [diff] [blame] | 1184 | CONFIG_RTC_DS164x - use Dallas DS164x RTC |
Tor Krill | b27939b | 2008-03-15 15:40:26 +0100 | [diff] [blame] | 1185 | CONFIG_RTC_ISL1208 - use Intersil ISL1208 RTC |
wdenk | aeba06f | 2004-06-09 17:34:58 +0000 | [diff] [blame] | 1186 | CONFIG_RTC_MAX6900 - use Maxim, Inc. MAX6900 RTC |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 1187 | CONFIG_SYS_RTC_DS1337_NOOSC - Turn off the OSC output for DS1337 |
Heiko Schocher | 1f1b701 | 2011-03-28 09:24:22 +0200 | [diff] [blame] | 1188 | CONFIG_SYS_RV3029_TCR - enable trickle charger on |
| 1189 | RV3029 RTC. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1190 | |
wdenk | b9bbd24 | 2003-06-30 16:24:52 +0000 | [diff] [blame] | 1191 | Note that if the RTC uses I2C, then the I2C interface |
| 1192 | must also be configured. See I2C Support, below. |
| 1193 | |
Peter Tyser | 9902e42 | 2008-12-17 16:36:21 -0600 | [diff] [blame] | 1194 | - GPIO Support: |
| 1195 | CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO |
Peter Tyser | 9902e42 | 2008-12-17 16:36:21 -0600 | [diff] [blame] | 1196 | |
Chris Packham | 9b38320 | 2010-12-19 10:12:13 +0000 | [diff] [blame] | 1197 | The CONFIG_SYS_I2C_PCA953X_WIDTH option specifies a list of |
| 1198 | chip-ngpio pairs that tell the PCA953X driver the number of |
| 1199 | pins supported by a particular chip. |
| 1200 | |
Peter Tyser | 9902e42 | 2008-12-17 16:36:21 -0600 | [diff] [blame] | 1201 | Note that if the GPIO device uses I2C, then the I2C interface |
| 1202 | must also be configured. See I2C Support, below. |
| 1203 | |
Simon Glass | 4dc47ca | 2014-06-11 23:29:41 -0600 | [diff] [blame] | 1204 | - I/O tracing: |
| 1205 | When CONFIG_IO_TRACE is selected, U-Boot intercepts all I/O |
| 1206 | accesses and can checksum them or write a list of them out |
| 1207 | to memory. See the 'iotrace' command for details. This is |
| 1208 | useful for testing device drivers since it can confirm that |
| 1209 | the driver behaves the same way before and after a code |
| 1210 | change. Currently this is supported on sandbox and arm. To |
| 1211 | add support for your architecture, add '#include <iotrace.h>' |
| 1212 | to the bottom of arch/<arch>/include/asm/io.h and test. |
| 1213 | |
| 1214 | Example output from the 'iotrace stats' command is below. |
| 1215 | Note that if the trace buffer is exhausted, the checksum will |
| 1216 | still continue to operate. |
| 1217 | |
| 1218 | iotrace is enabled |
| 1219 | Start: 10000000 (buffer start address) |
| 1220 | Size: 00010000 (buffer size) |
| 1221 | Offset: 00000120 (current buffer offset) |
| 1222 | Output: 10000120 (start + offset) |
| 1223 | Count: 00000018 (number of trace records) |
| 1224 | CRC32: 9526fb66 (CRC32 of all trace records) |
| 1225 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1226 | - Timestamp Support: |
| 1227 | |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 1228 | When CONFIG_TIMESTAMP is selected, the timestamp |
| 1229 | (date and time) of an image is printed by image |
| 1230 | commands like bootm or iminfo. This option is |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 1231 | automatically enabled when you select CONFIG_CMD_DATE . |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1232 | |
Karl O. Pinc | 8b1f90a | 2012-08-16 06:20:15 +0000 | [diff] [blame] | 1233 | - Partition Labels (disklabels) Supported: |
| 1234 | Zero or more of the following: |
| 1235 | CONFIG_MAC_PARTITION Apple's MacOS partition table. |
| 1236 | CONFIG_DOS_PARTITION MS Dos partition table, traditional on the |
| 1237 | Intel architecture, USB sticks, etc. |
| 1238 | CONFIG_ISO_PARTITION ISO partition table, used on CDROM etc. |
| 1239 | CONFIG_EFI_PARTITION GPT partition table, common when EFI is the |
| 1240 | bootloader. Note 2TB partition limit; see |
| 1241 | disk/part_efi.c |
| 1242 | CONFIG_MTD_PARTITIONS Memory Technology Device partition table. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1243 | |
Wolfgang Denk | b240aef | 2008-03-26 10:40:12 +0100 | [diff] [blame] | 1244 | If IDE or SCSI support is enabled (CONFIG_CMD_IDE or |
Simon Glass | 8706b81 | 2016-05-01 11:36:02 -0600 | [diff] [blame] | 1245 | CONFIG_SCSI) you must configure support for at |
Karl O. Pinc | 8b1f90a | 2012-08-16 06:20:15 +0000 | [diff] [blame] | 1246 | least one non-MTD partition type as well. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1247 | |
| 1248 | - IDE Reset method: |
wdenk | 369d43d | 2004-03-14 14:09:05 +0000 | [diff] [blame] | 1249 | CONFIG_IDE_RESET_ROUTINE - this is defined in several |
| 1250 | board configurations files but used nowhere! |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1251 | |
wdenk | 369d43d | 2004-03-14 14:09:05 +0000 | [diff] [blame] | 1252 | CONFIG_IDE_RESET - is this is defined, IDE Reset will |
| 1253 | be performed by calling the function |
| 1254 | ide_set_reset(int reset) |
| 1255 | which has to be defined in a board specific file |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1256 | |
| 1257 | - ATAPI Support: |
| 1258 | CONFIG_ATAPI |
| 1259 | |
| 1260 | Set this to enable ATAPI support. |
| 1261 | |
wdenk | f602aa0 | 2004-03-13 23:29:43 +0000 | [diff] [blame] | 1262 | - LBA48 Support |
| 1263 | CONFIG_LBA48 |
| 1264 | |
| 1265 | Set this to enable support for disks larger than 137GB |
Heiko Schocher | 0f602e1 | 2009-12-03 11:21:21 +0100 | [diff] [blame] | 1266 | Also look at CONFIG_SYS_64BIT_LBA. |
wdenk | f602aa0 | 2004-03-13 23:29:43 +0000 | [diff] [blame] | 1267 | Whithout these , LBA48 support uses 32bit variables and will 'only' |
| 1268 | support disks up to 2.1TB. |
| 1269 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 1270 | CONFIG_SYS_64BIT_LBA: |
wdenk | f602aa0 | 2004-03-13 23:29:43 +0000 | [diff] [blame] | 1271 | When enabled, makes the IDE subsystem use 64bit sector addresses. |
| 1272 | Default is 32bit. |
| 1273 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1274 | - SCSI Support: |
| 1275 | At the moment only there is only support for the |
| 1276 | SYM53C8XX SCSI controller; define |
| 1277 | CONFIG_SCSI_SYM53C8XX to enable it. |
| 1278 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 1279 | CONFIG_SYS_SCSI_MAX_LUN [8], CONFIG_SYS_SCSI_MAX_SCSI_ID [7] and |
| 1280 | CONFIG_SYS_SCSI_MAX_DEVICE [CONFIG_SYS_SCSI_MAX_SCSI_ID * |
| 1281 | CONFIG_SYS_SCSI_MAX_LUN] can be adjusted to define the |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1282 | maximum numbers of LUNs, SCSI ID's and target |
| 1283 | devices. |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 1284 | CONFIG_SYS_SCSI_SYM53C8XX_CCF to fix clock timing (80Mhz) |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1285 | |
Wolfgang Denk | ec7fbf5 | 2013-10-04 17:43:24 +0200 | [diff] [blame] | 1286 | The environment variable 'scsidevs' is set to the number of |
| 1287 | SCSI devices found during the last scan. |
Stefan Reinauer | e50a10e | 2012-10-29 05:23:48 +0000 | [diff] [blame] | 1288 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1289 | - NETWORK Support (PCI): |
wdenk | 4e112c1 | 2003-06-03 23:54:09 +0000 | [diff] [blame] | 1290 | CONFIG_E1000 |
Kyle Moffett | 64b94dd | 2011-10-18 11:05:29 +0000 | [diff] [blame] | 1291 | Support for Intel 8254x/8257x gigabit chips. |
| 1292 | |
| 1293 | CONFIG_E1000_SPI |
| 1294 | Utility code for direct access to the SPI bus on Intel 8257x. |
| 1295 | This does not do anything useful unless you set at least one |
| 1296 | of CONFIG_CMD_E1000 or CONFIG_E1000_SPI_GENERIC. |
| 1297 | |
| 1298 | CONFIG_E1000_SPI_GENERIC |
| 1299 | Allow generic access to the SPI bus on the Intel 8257x, for |
| 1300 | example with the "sspi" command. |
| 1301 | |
| 1302 | CONFIG_CMD_E1000 |
| 1303 | Management command for E1000 devices. When used on devices |
| 1304 | with SPI support you can reprogram the EEPROM from U-Boot. |
stroese | 94ef1cf | 2003-06-05 15:39:44 +0000 | [diff] [blame] | 1305 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1306 | CONFIG_EEPRO100 |
| 1307 | Support for Intel 82557/82559/82559ER chips. |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 1308 | Optional CONFIG_EEPRO100_SROM_WRITE enables EEPROM |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1309 | write routine for first time initialisation. |
| 1310 | |
| 1311 | CONFIG_TULIP |
| 1312 | Support for Digital 2114x chips. |
| 1313 | Optional CONFIG_TULIP_SELECT_MEDIA for board specific |
| 1314 | modem chip initialisation (KS8761/QS6611). |
| 1315 | |
| 1316 | CONFIG_NATSEMI |
| 1317 | Support for National dp83815 chips. |
| 1318 | |
| 1319 | CONFIG_NS8382X |
| 1320 | Support for National dp8382[01] gigabit chips. |
| 1321 | |
wdenk | aa60336 | 2003-05-12 21:50:16 +0000 | [diff] [blame] | 1322 | - NETWORK Support (other): |
| 1323 | |
Jens Scharsig | dab7cb8 | 2010-01-23 12:03:45 +0100 | [diff] [blame] | 1324 | CONFIG_DRIVER_AT91EMAC |
| 1325 | Support for AT91RM9200 EMAC. |
| 1326 | |
| 1327 | CONFIG_RMII |
| 1328 | Define this to use reduced MII inteface |
| 1329 | |
| 1330 | CONFIG_DRIVER_AT91EMAC_QUIET |
| 1331 | If this defined, the driver is quiet. |
| 1332 | The driver doen't show link status messages. |
| 1333 | |
Rob Herring | c9830dc | 2011-12-15 11:15:49 +0000 | [diff] [blame] | 1334 | CONFIG_CALXEDA_XGMAC |
| 1335 | Support for the Calxeda XGMAC device |
| 1336 | |
Ashok | 93fb872 | 2012-10-15 06:20:47 +0000 | [diff] [blame] | 1337 | CONFIG_LAN91C96 |
wdenk | aa60336 | 2003-05-12 21:50:16 +0000 | [diff] [blame] | 1338 | Support for SMSC's LAN91C96 chips. |
| 1339 | |
| 1340 | CONFIG_LAN91C96_BASE |
| 1341 | Define this to hold the physical address |
| 1342 | of the LAN91C96's I/O space |
| 1343 | |
| 1344 | CONFIG_LAN91C96_USE_32_BIT |
| 1345 | Define this to enable 32 bit addressing |
| 1346 | |
Ashok | 93fb872 | 2012-10-15 06:20:47 +0000 | [diff] [blame] | 1347 | CONFIG_SMC91111 |
wdenk | 3c71176 | 2004-06-09 13:37:52 +0000 | [diff] [blame] | 1348 | Support for SMSC's LAN91C111 chip |
| 1349 | |
| 1350 | CONFIG_SMC91111_BASE |
| 1351 | Define this to hold the physical address |
| 1352 | of the device (I/O space) |
| 1353 | |
| 1354 | CONFIG_SMC_USE_32_BIT |
| 1355 | Define this if data bus is 32 bits |
| 1356 | |
| 1357 | CONFIG_SMC_USE_IOFUNCS |
| 1358 | Define this to use i/o functions instead of macros |
| 1359 | (some hardware wont work with macros) |
| 1360 | |
Heiko Schocher | 7d037f7 | 2011-11-15 10:00:04 -0500 | [diff] [blame] | 1361 | CONFIG_DRIVER_TI_EMAC |
| 1362 | Support for davinci emac |
| 1363 | |
| 1364 | CONFIG_SYS_DAVINCI_EMAC_PHY_COUNT |
| 1365 | Define this if you have more then 3 PHYs. |
| 1366 | |
Macpaul Lin | 199c625 | 2010-12-21 16:59:46 +0800 | [diff] [blame] | 1367 | CONFIG_FTGMAC100 |
| 1368 | Support for Faraday's FTGMAC100 Gigabit SoC Ethernet |
| 1369 | |
| 1370 | CONFIG_FTGMAC100_EGIGA |
| 1371 | Define this to use GE link update with gigabit PHY. |
| 1372 | Define this if FTGMAC100 is connected to gigabit PHY. |
| 1373 | If your system has 10/100 PHY only, it might not occur |
| 1374 | wrong behavior. Because PHY usually return timeout or |
| 1375 | useless data when polling gigabit status and gigabit |
| 1376 | control registers. This behavior won't affect the |
| 1377 | correctnessof 10/100 link speed update. |
| 1378 | |
Mike Rapoport | f4761af | 2009-11-11 10:03:03 +0200 | [diff] [blame] | 1379 | CONFIG_SMC911X |
Jens Gehrlein | 1dd4825 | 2008-05-05 14:06:11 +0200 | [diff] [blame] | 1380 | Support for SMSC's LAN911x and LAN921x chips |
| 1381 | |
Mike Rapoport | f4761af | 2009-11-11 10:03:03 +0200 | [diff] [blame] | 1382 | CONFIG_SMC911X_BASE |
Jens Gehrlein | 1dd4825 | 2008-05-05 14:06:11 +0200 | [diff] [blame] | 1383 | Define this to hold the physical address |
| 1384 | of the device (I/O space) |
| 1385 | |
Mike Rapoport | f4761af | 2009-11-11 10:03:03 +0200 | [diff] [blame] | 1386 | CONFIG_SMC911X_32_BIT |
Jens Gehrlein | 1dd4825 | 2008-05-05 14:06:11 +0200 | [diff] [blame] | 1387 | Define this if data bus is 32 bits |
| 1388 | |
Mike Rapoport | f4761af | 2009-11-11 10:03:03 +0200 | [diff] [blame] | 1389 | CONFIG_SMC911X_16_BIT |
Jens Gehrlein | 1dd4825 | 2008-05-05 14:06:11 +0200 | [diff] [blame] | 1390 | Define this if data bus is 16 bits. If your processor |
| 1391 | automatically converts one 32 bit word to two 16 bit |
Mike Rapoport | f4761af | 2009-11-11 10:03:03 +0200 | [diff] [blame] | 1392 | words you may also try CONFIG_SMC911X_32_BIT. |
Jens Gehrlein | 1dd4825 | 2008-05-05 14:06:11 +0200 | [diff] [blame] | 1393 | |
Yoshihiro Shimoda | ed4cea0 | 2011-01-27 10:06:03 +0900 | [diff] [blame] | 1394 | CONFIG_SH_ETHER |
| 1395 | Support for Renesas on-chip Ethernet controller |
| 1396 | |
| 1397 | CONFIG_SH_ETHER_USE_PORT |
| 1398 | Define the number of ports to be used |
| 1399 | |
| 1400 | CONFIG_SH_ETHER_PHY_ADDR |
| 1401 | Define the ETH PHY's address |
| 1402 | |
Yoshihiro Shimoda | 281aa05 | 2011-01-27 10:06:08 +0900 | [diff] [blame] | 1403 | CONFIG_SH_ETHER_CACHE_WRITEBACK |
| 1404 | If this option is set, the driver enables cache flush. |
| 1405 | |
Heiko Schocher | 2b38776 | 2014-07-18 06:07:19 +0200 | [diff] [blame] | 1406 | - PWM Support: |
| 1407 | CONFIG_PWM_IMX |
| 1408 | Support for PWM modul on the imx6. |
| 1409 | |
Vadim Bendebury | dac6964 | 2011-10-17 08:36:14 +0000 | [diff] [blame] | 1410 | - TPM Support: |
Che-liang Chiou | acea570 | 2013-04-12 11:04:34 +0000 | [diff] [blame] | 1411 | CONFIG_TPM |
| 1412 | Support TPM devices. |
| 1413 | |
Christophe Ricard | 8759ff8 | 2015-10-06 22:54:41 +0200 | [diff] [blame] | 1414 | CONFIG_TPM_TIS_INFINEON |
| 1415 | Support for Infineon i2c bus TPM devices. Only one device |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 1416 | per system is supported at this time. |
| 1417 | |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 1418 | CONFIG_TPM_TIS_I2C_BURST_LIMITATION |
| 1419 | Define the burst count bytes upper limit |
| 1420 | |
Christophe Ricard | 8824923 | 2016-01-21 23:27:13 +0100 | [diff] [blame] | 1421 | CONFIG_TPM_ST33ZP24 |
| 1422 | Support for STMicroelectronics TPM devices. Requires DM_TPM support. |
| 1423 | |
| 1424 | CONFIG_TPM_ST33ZP24_I2C |
| 1425 | Support for STMicroelectronics ST33ZP24 I2C devices. |
| 1426 | Requires TPM_ST33ZP24 and I2C. |
| 1427 | |
Christophe Ricard | 5ffadc3 | 2016-01-21 23:27:14 +0100 | [diff] [blame] | 1428 | CONFIG_TPM_ST33ZP24_SPI |
| 1429 | Support for STMicroelectronics ST33ZP24 SPI devices. |
| 1430 | Requires TPM_ST33ZP24 and SPI. |
| 1431 | |
Dirk Eibach | 2048909 | 2013-06-26 15:55:15 +0200 | [diff] [blame] | 1432 | CONFIG_TPM_ATMEL_TWI |
| 1433 | Support for Atmel TWI TPM device. Requires I2C support. |
| 1434 | |
Che-liang Chiou | acea570 | 2013-04-12 11:04:34 +0000 | [diff] [blame] | 1435 | CONFIG_TPM_TIS_LPC |
Vadim Bendebury | dac6964 | 2011-10-17 08:36:14 +0000 | [diff] [blame] | 1436 | Support for generic parallel port TPM devices. Only one device |
| 1437 | per system is supported at this time. |
| 1438 | |
| 1439 | CONFIG_TPM_TIS_BASE_ADDRESS |
| 1440 | Base address where the generic TPM device is mapped |
| 1441 | to. Contemporary x86 systems usually map it at |
| 1442 | 0xfed40000. |
| 1443 | |
Reinhard Pfau | 4fece43 | 2013-06-26 15:55:13 +0200 | [diff] [blame] | 1444 | CONFIG_CMD_TPM |
| 1445 | Add tpm monitor functions. |
| 1446 | Requires CONFIG_TPM. If CONFIG_TPM_AUTH_SESSIONS is set, also |
| 1447 | provides monitor access to authorized functions. |
| 1448 | |
| 1449 | CONFIG_TPM |
| 1450 | Define this to enable the TPM support library which provides |
| 1451 | functional interfaces to some TPM commands. |
| 1452 | Requires support for a TPM device. |
| 1453 | |
| 1454 | CONFIG_TPM_AUTH_SESSIONS |
| 1455 | Define this to enable authorized functions in the TPM library. |
| 1456 | Requires CONFIG_TPM and CONFIG_SHA1. |
| 1457 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1458 | - USB Support: |
| 1459 | At the moment only the UHCI host controller is |
wdenk | 369d43d | 2004-03-14 14:09:05 +0000 | [diff] [blame] | 1460 | supported (PIP405, MIP405, MPC5200); define |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1461 | CONFIG_USB_UHCI to enable it. |
| 1462 | define CONFIG_USB_KEYBOARD to enable the USB Keyboard |
wdenk | fb30b4c | 2004-10-09 22:44:59 +0000 | [diff] [blame] | 1463 | and define CONFIG_USB_STORAGE to enable the USB |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1464 | storage devices. |
| 1465 | Note: |
| 1466 | Supported are USB Keyboards and USB Floppy drives |
| 1467 | (TEAC FD-05PUB). |
wdenk | 369d43d | 2004-03-14 14:09:05 +0000 | [diff] [blame] | 1468 | MPC5200 USB requires additional defines: |
| 1469 | CONFIG_USB_CLOCK |
| 1470 | for 528 MHz Clock: 0x0001bbbb |
Eric Millbrandt | 0284852 | 2009-08-13 08:32:37 -0500 | [diff] [blame] | 1471 | CONFIG_PSC3_USB |
| 1472 | for USB on PSC3 |
wdenk | 369d43d | 2004-03-14 14:09:05 +0000 | [diff] [blame] | 1473 | CONFIG_USB_CONFIG |
| 1474 | for differential drivers: 0x00001000 |
| 1475 | for single ended drivers: 0x00005000 |
Eric Millbrandt | 0284852 | 2009-08-13 08:32:37 -0500 | [diff] [blame] | 1476 | for differential drivers on PSC3: 0x00000100 |
| 1477 | for single ended drivers on PSC3: 0x00004100 |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 1478 | CONFIG_SYS_USB_EVENT_POLL |
Zhang Wei | 063f9ff | 2007-06-06 10:08:13 +0200 | [diff] [blame] | 1479 | May be defined to allow interrupt polling |
| 1480 | instead of using asynchronous interrupts |
wdenk | 369d43d | 2004-03-14 14:09:05 +0000 | [diff] [blame] | 1481 | |
Simon Glass | 5978cdb | 2012-02-27 10:52:47 +0000 | [diff] [blame] | 1482 | CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the |
| 1483 | txfilltuning field in the EHCI controller on reset. |
| 1484 | |
Oleksandr Tymoshenko | 7a88175 | 2014-02-01 21:51:25 -0700 | [diff] [blame] | 1485 | CONFIG_USB_DWC2_REG_ADDR the physical CPU address of the DWC2 |
| 1486 | HW module registers. |
| 1487 | |
Wolfgang Denk | 3f0137b | 2006-06-14 17:45:53 +0200 | [diff] [blame] | 1488 | - USB Device: |
| 1489 | Define the below if you wish to use the USB console. |
| 1490 | Once firmware is rebuilt from a serial console issue the |
| 1491 | command "setenv stdin usbtty; setenv stdout usbtty" and |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 1492 | attach your USB cable. The Unix command "dmesg" should print |
Wolfgang Denk | 3f0137b | 2006-06-14 17:45:53 +0200 | [diff] [blame] | 1493 | it has found a new device. The environment variable usbtty |
| 1494 | can be set to gserial or cdc_acm to enable your device to |
Wolfgang Denk | e260182 | 2006-06-14 18:14:56 +0200 | [diff] [blame] | 1495 | appear to a USB host as a Linux gserial device or a |
Wolfgang Denk | 3f0137b | 2006-06-14 17:45:53 +0200 | [diff] [blame] | 1496 | Common Device Class Abstract Control Model serial device. |
| 1497 | If you select usbtty = gserial you should be able to enumerate |
| 1498 | a Linux host by |
| 1499 | # modprobe usbserial vendor=0xVendorID product=0xProductID |
| 1500 | else if using cdc_acm, simply setting the environment |
| 1501 | variable usbtty to be cdc_acm should suffice. The following |
| 1502 | might be defined in YourBoardName.h |
Wolfgang Denk | e260182 | 2006-06-14 18:14:56 +0200 | [diff] [blame] | 1503 | |
Wolfgang Denk | 3f0137b | 2006-06-14 17:45:53 +0200 | [diff] [blame] | 1504 | CONFIG_USB_DEVICE |
| 1505 | Define this to build a UDC device |
| 1506 | |
| 1507 | CONFIG_USB_TTY |
| 1508 | Define this to have a tty type of device available to |
| 1509 | talk to the UDC device |
Wolfgang Denk | e260182 | 2006-06-14 18:14:56 +0200 | [diff] [blame] | 1510 | |
Vipin KUMAR | bdb1770 | 2012-03-26 15:38:06 +0530 | [diff] [blame] | 1511 | CONFIG_USBD_HS |
| 1512 | Define this to enable the high speed support for usb |
| 1513 | device and usbtty. If this feature is enabled, a routine |
| 1514 | int is_usbd_high_speed(void) |
| 1515 | also needs to be defined by the driver to dynamically poll |
| 1516 | whether the enumeration has succeded at high speed or full |
| 1517 | speed. |
| 1518 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 1519 | CONFIG_SYS_CONSOLE_IS_IN_ENV |
Wolfgang Denk | 3f0137b | 2006-06-14 17:45:53 +0200 | [diff] [blame] | 1520 | Define this if you want stdin, stdout &/or stderr to |
| 1521 | be set to usbtty. |
| 1522 | |
| 1523 | mpc8xx: |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 1524 | CONFIG_SYS_USB_EXTC_CLK 0xBLAH |
Wolfgang Denk | 3f0137b | 2006-06-14 17:45:53 +0200 | [diff] [blame] | 1525 | Derive USB clock from external clock "blah" |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 1526 | - CONFIG_SYS_USB_EXTC_CLK 0x02 |
Wolfgang Denk | e260182 | 2006-06-14 18:14:56 +0200 | [diff] [blame] | 1527 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 1528 | CONFIG_SYS_USB_BRG_CLK 0xBLAH |
Wolfgang Denk | 3f0137b | 2006-06-14 17:45:53 +0200 | [diff] [blame] | 1529 | Derive USB clock from brgclk |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 1530 | - CONFIG_SYS_USB_BRG_CLK 0x04 |
Wolfgang Denk | 3f0137b | 2006-06-14 17:45:53 +0200 | [diff] [blame] | 1531 | |
Wolfgang Denk | e260182 | 2006-06-14 18:14:56 +0200 | [diff] [blame] | 1532 | If you have a USB-IF assigned VendorID then you may wish to |
Wolfgang Denk | 3f0137b | 2006-06-14 17:45:53 +0200 | [diff] [blame] | 1533 | define your own vendor specific values either in BoardName.h |
Wolfgang Denk | e260182 | 2006-06-14 18:14:56 +0200 | [diff] [blame] | 1534 | or directly in usbd_vendor_info.h. If you don't define |
Wolfgang Denk | 3f0137b | 2006-06-14 17:45:53 +0200 | [diff] [blame] | 1535 | CONFIG_USBD_MANUFACTURER, CONFIG_USBD_PRODUCT_NAME, |
| 1536 | CONFIG_USBD_VENDORID and CONFIG_USBD_PRODUCTID, then U-Boot |
| 1537 | should pretend to be a Linux device to it's target host. |
| 1538 | |
| 1539 | CONFIG_USBD_MANUFACTURER |
| 1540 | Define this string as the name of your company for |
| 1541 | - CONFIG_USBD_MANUFACTURER "my company" |
Wolfgang Denk | e260182 | 2006-06-14 18:14:56 +0200 | [diff] [blame] | 1542 | |
Wolfgang Denk | 3f0137b | 2006-06-14 17:45:53 +0200 | [diff] [blame] | 1543 | CONFIG_USBD_PRODUCT_NAME |
| 1544 | Define this string as the name of your product |
| 1545 | - CONFIG_USBD_PRODUCT_NAME "acme usb device" |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1546 | |
Wolfgang Denk | 3f0137b | 2006-06-14 17:45:53 +0200 | [diff] [blame] | 1547 | CONFIG_USBD_VENDORID |
| 1548 | Define this as your assigned Vendor ID from the USB |
| 1549 | Implementors Forum. This *must* be a genuine Vendor ID |
| 1550 | to avoid polluting the USB namespace. |
| 1551 | - CONFIG_USBD_VENDORID 0xFFFF |
Wolfgang Denk | e260182 | 2006-06-14 18:14:56 +0200 | [diff] [blame] | 1552 | |
Wolfgang Denk | 3f0137b | 2006-06-14 17:45:53 +0200 | [diff] [blame] | 1553 | CONFIG_USBD_PRODUCTID |
| 1554 | Define this as the unique Product ID |
| 1555 | for your device |
| 1556 | - CONFIG_USBD_PRODUCTID 0xFFFF |
Wolfgang Denk | e260182 | 2006-06-14 18:14:56 +0200 | [diff] [blame] | 1557 | |
Igor Grinberg | ac5f6ee | 2011-12-12 12:08:35 +0200 | [diff] [blame] | 1558 | - ULPI Layer Support: |
| 1559 | The ULPI (UTMI Low Pin (count) Interface) PHYs are supported via |
| 1560 | the generic ULPI layer. The generic layer accesses the ULPI PHY |
| 1561 | via the platform viewport, so you need both the genric layer and |
| 1562 | the viewport enabled. Currently only Chipidea/ARC based |
| 1563 | viewport is supported. |
| 1564 | To enable the ULPI layer support, define CONFIG_USB_ULPI and |
| 1565 | CONFIG_USB_ULPI_VIEWPORT in your board configuration file. |
Lucas Stach | f31e411 | 2012-10-01 00:44:35 +0200 | [diff] [blame] | 1566 | If your ULPI phy needs a different reference clock than the |
| 1567 | standard 24 MHz then you have to define CONFIG_ULPI_REF_CLK to |
| 1568 | the appropriate value in Hz. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1569 | |
wdenk | 7a428cc | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 1570 | - MMC Support: |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 1571 | The MMC controller on the Intel PXA is supported. To |
| 1572 | enable this define CONFIG_MMC. The MMC can be |
| 1573 | accessed from the boot prompt by mapping the device |
wdenk | 7a428cc | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 1574 | to physical memory similar to flash. Command line is |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 1575 | enabled with CONFIG_CMD_MMC. The MMC driver also works with |
| 1576 | the FAT fs. This is enabled with CONFIG_CMD_FAT. |
wdenk | 7a428cc | 2003-06-15 22:40:42 +0000 | [diff] [blame] | 1577 | |
Yoshihiro Shimoda | db7717b | 2011-07-04 22:21:22 +0000 | [diff] [blame] | 1578 | CONFIG_SH_MMCIF |
| 1579 | Support for Renesas on-chip MMCIF controller |
| 1580 | |
| 1581 | CONFIG_SH_MMCIF_ADDR |
| 1582 | Define the base address of MMCIF registers |
| 1583 | |
| 1584 | CONFIG_SH_MMCIF_CLK |
| 1585 | Define the clock frequency for MMCIF |
| 1586 | |
Pierre Aubert | bcc302c | 2014-04-24 10:30:08 +0200 | [diff] [blame] | 1587 | CONFIG_GENERIC_MMC |
| 1588 | Enable the generic MMC driver |
| 1589 | |
| 1590 | CONFIG_SUPPORT_EMMC_BOOT |
| 1591 | Enable some additional features of the eMMC boot partitions. |
| 1592 | |
| 1593 | CONFIG_SUPPORT_EMMC_RPMB |
| 1594 | Enable the commands for reading, writing and programming the |
| 1595 | key for the Replay Protection Memory Block partition in eMMC. |
| 1596 | |
Tom Rini | 58a8d32 | 2013-03-14 05:32:47 +0000 | [diff] [blame] | 1597 | - USB Device Firmware Update (DFU) class support: |
Paul Kocialkowski | 045d605 | 2015-06-12 19:56:58 +0200 | [diff] [blame] | 1598 | CONFIG_USB_FUNCTION_DFU |
Tom Rini | 58a8d32 | 2013-03-14 05:32:47 +0000 | [diff] [blame] | 1599 | This enables the USB portion of the DFU USB class |
| 1600 | |
| 1601 | CONFIG_CMD_DFU |
| 1602 | This enables the command "dfu" which is used to have |
| 1603 | U-Boot create a DFU class device via USB. This command |
| 1604 | requires that the "dfu_alt_info" environment variable be |
| 1605 | set and define the alt settings to expose to the host. |
| 1606 | |
| 1607 | CONFIG_DFU_MMC |
| 1608 | This enables support for exposing (e)MMC devices via DFU. |
| 1609 | |
Pantelis Antoniou | cf14d0d | 2013-03-14 05:32:52 +0000 | [diff] [blame] | 1610 | CONFIG_DFU_NAND |
| 1611 | This enables support for exposing NAND devices via DFU. |
| 1612 | |
Afzal Mohammed | e3c687a | 2013-09-18 01:15:24 +0530 | [diff] [blame] | 1613 | CONFIG_DFU_RAM |
| 1614 | This enables support for exposing RAM via DFU. |
| 1615 | Note: DFU spec refer to non-volatile memory usage, but |
| 1616 | allow usages beyond the scope of spec - here RAM usage, |
| 1617 | one that would help mostly the developer. |
| 1618 | |
Heiko Schocher | a2f831e | 2013-06-12 06:05:51 +0200 | [diff] [blame] | 1619 | CONFIG_SYS_DFU_DATA_BUF_SIZE |
| 1620 | Dfu transfer uses a buffer before writing data to the |
| 1621 | raw storage device. Make the size (in bytes) of this buffer |
| 1622 | configurable. The size of this buffer is also configurable |
| 1623 | through the "dfu_bufsiz" environment variable. |
| 1624 | |
Pantelis Antoniou | a6e788d | 2013-03-14 05:32:48 +0000 | [diff] [blame] | 1625 | CONFIG_SYS_DFU_MAX_FILE_SIZE |
| 1626 | When updating files rather than the raw storage device, |
| 1627 | we use a static buffer to copy the file into and then write |
| 1628 | the buffer once we've been given the whole file. Define |
| 1629 | this to the maximum filesize (in bytes) for the buffer. |
| 1630 | Default is 4 MiB if undefined. |
| 1631 | |
Heiko Schocher | e1ba151 | 2014-03-18 08:09:56 +0100 | [diff] [blame] | 1632 | DFU_DEFAULT_POLL_TIMEOUT |
| 1633 | Poll timeout [ms], is the timeout a device can send to the |
| 1634 | host. The host must wait for this timeout before sending |
| 1635 | a subsequent DFU_GET_STATUS request to the device. |
| 1636 | |
| 1637 | DFU_MANIFEST_POLL_TIMEOUT |
| 1638 | Poll timeout [ms], which the device sends to the host when |
| 1639 | entering dfuMANIFEST state. Host waits this timeout, before |
| 1640 | sending again an USB request to the device. |
| 1641 | |
Sebastian Siewior | 9d4471e | 2014-05-05 15:08:10 -0500 | [diff] [blame] | 1642 | - USB Device Android Fastboot support: |
Paul Kocialkowski | d55acc0 | 2015-06-12 19:56:59 +0200 | [diff] [blame] | 1643 | CONFIG_USB_FUNCTION_FASTBOOT |
| 1644 | This enables the USB part of the fastboot gadget |
| 1645 | |
Sebastian Siewior | 9d4471e | 2014-05-05 15:08:10 -0500 | [diff] [blame] | 1646 | CONFIG_CMD_FASTBOOT |
| 1647 | This enables the command "fastboot" which enables the Android |
| 1648 | fastboot mode for the platform's USB device. Fastboot is a USB |
| 1649 | protocol for downloading images, flashing and device control |
| 1650 | used on Android devices. |
| 1651 | See doc/README.android-fastboot for more information. |
| 1652 | |
| 1653 | CONFIG_ANDROID_BOOT_IMAGE |
| 1654 | This enables support for booting images which use the Android |
| 1655 | image format header. |
| 1656 | |
Paul Kocialkowski | f84f091 | 2015-07-20 12:38:22 +0200 | [diff] [blame] | 1657 | CONFIG_FASTBOOT_BUF_ADDR |
Sebastian Siewior | 9d4471e | 2014-05-05 15:08:10 -0500 | [diff] [blame] | 1658 | The fastboot protocol requires a large memory buffer for |
| 1659 | downloads. Define this to the starting RAM address to use for |
| 1660 | downloaded images. |
| 1661 | |
Paul Kocialkowski | f84f091 | 2015-07-20 12:38:22 +0200 | [diff] [blame] | 1662 | CONFIG_FASTBOOT_BUF_SIZE |
Sebastian Siewior | 9d4471e | 2014-05-05 15:08:10 -0500 | [diff] [blame] | 1663 | The fastboot protocol requires a large memory buffer for |
| 1664 | downloads. This buffer should be as large as possible for a |
| 1665 | platform. Define this to the size available RAM for fastboot. |
| 1666 | |
Steve Rae | bfb9ba4 | 2014-08-26 11:47:28 -0700 | [diff] [blame] | 1667 | CONFIG_FASTBOOT_FLASH |
| 1668 | The fastboot protocol includes a "flash" command for writing |
| 1669 | the downloaded image to a non-volatile storage device. Define |
| 1670 | this to enable the "fastboot flash" command. |
| 1671 | |
| 1672 | CONFIG_FASTBOOT_FLASH_MMC_DEV |
| 1673 | The fastboot "flash" command requires additional information |
| 1674 | regarding the non-volatile storage device. Define this to |
| 1675 | the eMMC device that fastboot should use to store the image. |
| 1676 | |
Steve Rae | 7d05934 | 2014-12-12 15:51:54 -0800 | [diff] [blame] | 1677 | CONFIG_FASTBOOT_GPT_NAME |
| 1678 | The fastboot "flash" command supports writing the downloaded |
| 1679 | image to the Protective MBR and the Primary GUID Partition |
| 1680 | Table. (Additionally, this downloaded image is post-processed |
| 1681 | to generate and write the Backup GUID Partition Table.) |
| 1682 | This occurs when the specified "partition name" on the |
| 1683 | "fastboot flash" command line matches this value. |
Petr Kulhavy | 4ed1eca | 2016-09-09 10:27:18 +0200 | [diff] [blame] | 1684 | The default is "gpt" if undefined. |
Steve Rae | 7d05934 | 2014-12-12 15:51:54 -0800 | [diff] [blame] | 1685 | |
Petr Kulhavy | 9f174c9 | 2016-09-09 10:27:16 +0200 | [diff] [blame] | 1686 | CONFIG_FASTBOOT_MBR_NAME |
| 1687 | The fastboot "flash" command supports writing the downloaded |
| 1688 | image to DOS MBR. |
| 1689 | This occurs when the "partition name" specified on the |
| 1690 | "fastboot flash" command line matches this value. |
| 1691 | If not defined the default value "mbr" is used. |
| 1692 | |
wdenk | da04a8b | 2004-08-02 23:22:59 +0000 | [diff] [blame] | 1693 | - Journaling Flash filesystem support: |
| 1694 | CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE, |
| 1695 | CONFIG_JFFS2_NAND_DEV |
| 1696 | Define these for a default partition on a NAND device |
| 1697 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 1698 | CONFIG_SYS_JFFS2_FIRST_SECTOR, |
| 1699 | CONFIG_SYS_JFFS2_FIRST_BANK, CONFIG_SYS_JFFS2_NUM_BANKS |
wdenk | da04a8b | 2004-08-02 23:22:59 +0000 | [diff] [blame] | 1700 | Define these for a default partition on a NOR device |
| 1701 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 1702 | CONFIG_SYS_JFFS_CUSTOM_PART |
wdenk | da04a8b | 2004-08-02 23:22:59 +0000 | [diff] [blame] | 1703 | Define this to create an own partition. You have to provide a |
| 1704 | function struct part_info* jffs2_part_info(int part_num) |
| 1705 | |
| 1706 | If you define only one JFFS2 partition you may also want to |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 1707 | #define CONFIG_SYS_JFFS_SINGLE_PART 1 |
wdenk | da04a8b | 2004-08-02 23:22:59 +0000 | [diff] [blame] | 1708 | to disable the command chpart. This is the default when you |
| 1709 | have not defined a custom partition |
| 1710 | |
Donggeun Kim | 8f81400 | 2011-10-24 21:15:28 +0000 | [diff] [blame] | 1711 | - FAT(File Allocation Table) filesystem write function support: |
| 1712 | CONFIG_FAT_WRITE |
Donggeun Kim | b44c8ab | 2012-03-22 04:38:56 +0000 | [diff] [blame] | 1713 | |
| 1714 | Define this to enable support for saving memory data as a |
| 1715 | file in FAT formatted partition. |
| 1716 | |
| 1717 | This will also enable the command "fatwrite" enabling the |
| 1718 | user to write files to FAT. |
Donggeun Kim | 8f81400 | 2011-10-24 21:15:28 +0000 | [diff] [blame] | 1719 | |
Gabe Black | 7f8574c | 2012-10-12 14:26:11 +0000 | [diff] [blame] | 1720 | CBFS (Coreboot Filesystem) support |
| 1721 | CONFIG_CMD_CBFS |
| 1722 | |
| 1723 | Define this to enable support for reading from a Coreboot |
| 1724 | filesystem. Available commands are cbfsinit, cbfsinfo, cbfsls |
| 1725 | and cbfsload. |
| 1726 | |
Siva Durga Prasad Paladugu | 1c4cf33 | 2014-05-26 19:18:37 +0530 | [diff] [blame] | 1727 | - FAT(File Allocation Table) filesystem cluster size: |
| 1728 | CONFIG_FS_FAT_MAX_CLUSTSIZE |
| 1729 | |
| 1730 | Define the max cluster size for fat operations else |
| 1731 | a default value of 65536 will be defined. |
| 1732 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1733 | - Keyboard Support: |
Simon Glass | eaba37e | 2015-11-11 10:05:47 -0700 | [diff] [blame] | 1734 | See Kconfig help for available keyboard drivers. |
| 1735 | |
| 1736 | CONFIG_KEYBOARD |
| 1737 | |
| 1738 | Define this to enable a custom keyboard support. |
| 1739 | This simply calls drv_keyboard_init() which must be |
| 1740 | defined in your board-specific files. This option is deprecated |
| 1741 | and is only used by novena. For new boards, use driver model |
| 1742 | instead. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1743 | |
| 1744 | - Video support: |
| 1745 | CONFIG_VIDEO |
| 1746 | |
| 1747 | Define this to enable video support (for output to |
| 1748 | video). |
| 1749 | |
| 1750 | CONFIG_VIDEO_CT69000 |
| 1751 | |
| 1752 | Enable Chips & Technologies 69000 Video chip |
| 1753 | |
| 1754 | CONFIG_VIDEO_SMI_LYNXEM |
wdenk | d360213 | 2004-03-25 15:14:43 +0000 | [diff] [blame] | 1755 | Enable Silicon Motion SMI 712/710/810 Video chip. The |
wdenk | aea86e4 | 2004-03-23 22:53:55 +0000 | [diff] [blame] | 1756 | video output is selected via environment 'videoout' |
| 1757 | (1 = LCD and 2 = CRT). If videoout is undefined, CRT is |
| 1758 | assumed. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1759 | |
wdenk | d360213 | 2004-03-25 15:14:43 +0000 | [diff] [blame] | 1760 | For the CT69000 and SMI_LYNXEM drivers, videomode is |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 1761 | selected via environment 'videomode'. Two different ways |
wdenk | aea86e4 | 2004-03-23 22:53:55 +0000 | [diff] [blame] | 1762 | are possible: |
| 1763 | - "videomode=num" 'num' is a standard LiLo mode numbers. |
wdenk | 0593920 | 2004-04-18 17:39:38 +0000 | [diff] [blame] | 1764 | Following standard modes are supported (* is default): |
wdenk | aea86e4 | 2004-03-23 22:53:55 +0000 | [diff] [blame] | 1765 | |
| 1766 | Colors 640x480 800x600 1024x768 1152x864 1280x1024 |
| 1767 | -------------+--------------------------------------------- |
| 1768 | 8 bits | 0x301* 0x303 0x305 0x161 0x307 |
| 1769 | 15 bits | 0x310 0x313 0x316 0x162 0x319 |
| 1770 | 16 bits | 0x311 0x314 0x317 0x163 0x31A |
| 1771 | 24 bits | 0x312 0x315 0x318 ? 0x31B |
| 1772 | -------------+--------------------------------------------- |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1773 | (i.e. setenv videomode 317; saveenv; reset;) |
| 1774 | |
wdenk | d360213 | 2004-03-25 15:14:43 +0000 | [diff] [blame] | 1775 | - "videomode=bootargs" all the video parameters are parsed |
Marcel Ziswiler | aea6856 | 2007-12-30 03:30:46 +0100 | [diff] [blame] | 1776 | from the bootargs. (See drivers/video/videomodes.c) |
wdenk | aea86e4 | 2004-03-23 22:53:55 +0000 | [diff] [blame] | 1777 | |
| 1778 | |
stroese | b9c17c5 | 2003-04-04 15:53:41 +0000 | [diff] [blame] | 1779 | CONFIG_VIDEO_SED13806 |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 1780 | Enable Epson SED13806 driver. This driver supports 8bpp |
wdenk | 9dd2b88 | 2002-12-03 21:28:10 +0000 | [diff] [blame] | 1781 | and 16bpp modes defined by CONFIG_VIDEO_SED13806_8BPP |
| 1782 | or CONFIG_VIDEO_SED13806_16BPP |
| 1783 | |
Timur Tabi | 020edd2 | 2011-02-15 17:09:19 -0600 | [diff] [blame] | 1784 | CONFIG_FSL_DIU_FB |
Wolfgang Denk | 825223d | 2011-09-11 21:24:09 +0200 | [diff] [blame] | 1785 | Enable the Freescale DIU video driver. Reference boards for |
Timur Tabi | 020edd2 | 2011-02-15 17:09:19 -0600 | [diff] [blame] | 1786 | SOCs that have a DIU should define this macro to enable DIU |
| 1787 | support, and should also define these other macros: |
| 1788 | |
| 1789 | CONFIG_SYS_DIU_ADDR |
| 1790 | CONFIG_VIDEO |
| 1791 | CONFIG_CMD_BMP |
| 1792 | CONFIG_CFB_CONSOLE |
| 1793 | CONFIG_VIDEO_SW_CURSOR |
| 1794 | CONFIG_VGA_AS_SINGLE_DEVICE |
| 1795 | CONFIG_VIDEO_LOGO |
| 1796 | CONFIG_VIDEO_BMP_LOGO |
| 1797 | |
Timur Tabi | 32f709e | 2011-04-11 14:18:22 -0500 | [diff] [blame] | 1798 | The DIU driver will look for the 'video-mode' environment |
| 1799 | variable, and if defined, enable the DIU as a console during |
Fabio Estevam | d3ad5e5 | 2016-04-02 11:53:18 -0300 | [diff] [blame] | 1800 | boot. See the documentation file doc/README.video for a |
Timur Tabi | 32f709e | 2011-04-11 14:18:22 -0500 | [diff] [blame] | 1801 | description of this variable. |
Timur Tabi | 020edd2 | 2011-02-15 17:09:19 -0600 | [diff] [blame] | 1802 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1803 | - LCD Support: CONFIG_LCD |
| 1804 | |
| 1805 | Define this to enable LCD support (for output to LCD |
| 1806 | display); also select one of the supported displays |
| 1807 | by defining one of these: |
| 1808 | |
Stelian Pop | f6f8665 | 2008-05-09 21:57:18 +0200 | [diff] [blame] | 1809 | CONFIG_ATMEL_LCD: |
| 1810 | |
| 1811 | HITACHI TX09D70VM1CCA, 3.5", 240x320. |
| 1812 | |
wdenk | c0d54ae | 2003-11-25 16:55:19 +0000 | [diff] [blame] | 1813 | CONFIG_NEC_NL6448AC33: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1814 | |
wdenk | c0d54ae | 2003-11-25 16:55:19 +0000 | [diff] [blame] | 1815 | NEC NL6448AC33-18. Active, color, single scan. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1816 | |
wdenk | c0d54ae | 2003-11-25 16:55:19 +0000 | [diff] [blame] | 1817 | CONFIG_NEC_NL6448BC20 |
| 1818 | |
| 1819 | NEC NL6448BC20-08. 6.5", 640x480. |
| 1820 | Active, color, single scan. |
| 1821 | |
| 1822 | CONFIG_NEC_NL6448BC33_54 |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1823 | |
wdenk | c0d54ae | 2003-11-25 16:55:19 +0000 | [diff] [blame] | 1824 | NEC NL6448BC33-54. 10.4", 640x480. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1825 | Active, color, single scan. |
| 1826 | |
| 1827 | CONFIG_SHARP_16x9 |
| 1828 | |
| 1829 | Sharp 320x240. Active, color, single scan. |
| 1830 | It isn't 16x9, and I am not sure what it is. |
| 1831 | |
| 1832 | CONFIG_SHARP_LQ64D341 |
| 1833 | |
| 1834 | Sharp LQ64D341 display, 640x480. |
| 1835 | Active, color, single scan. |
| 1836 | |
| 1837 | CONFIG_HLD1045 |
| 1838 | |
| 1839 | HLD1045 display, 640x480. |
| 1840 | Active, color, single scan. |
| 1841 | |
| 1842 | CONFIG_OPTREX_BW |
| 1843 | |
| 1844 | Optrex CBL50840-2 NF-FW 99 22 M5 |
| 1845 | or |
| 1846 | Hitachi LMG6912RPFC-00T |
| 1847 | or |
| 1848 | Hitachi SP14Q002 |
| 1849 | |
| 1850 | 320x240. Black & white. |
| 1851 | |
| 1852 | Normally display is black on white background; define |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 1853 | CONFIG_SYS_WHITE_ON_BLACK to get it inverted. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 1854 | |
Simon Glass | 599a4df | 2012-10-17 13:24:54 +0000 | [diff] [blame] | 1855 | CONFIG_LCD_ALIGNMENT |
| 1856 | |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 1857 | Normally the LCD is page-aligned (typically 4KB). If this is |
Simon Glass | 599a4df | 2012-10-17 13:24:54 +0000 | [diff] [blame] | 1858 | defined then the LCD will be aligned to this value instead. |
| 1859 | For ARM it is sometimes useful to use MMU_SECTION_SIZE |
| 1860 | here, since it is cheaper to change data cache settings on |
| 1861 | a per-section basis. |
| 1862 | |
Simon Glass | af3e280 | 2012-10-17 13:24:59 +0000 | [diff] [blame] | 1863 | CONFIG_CONSOLE_SCROLL_LINES |
| 1864 | |
| 1865 | When the console need to be scrolled, this is the number of |
| 1866 | lines to scroll by. It defaults to 1. Increasing this makes |
| 1867 | the console jump but can help speed up operation when scrolling |
| 1868 | is slow. |
Simon Glass | 599a4df | 2012-10-17 13:24:54 +0000 | [diff] [blame] | 1869 | |
Hannes Petermaier | a3c8e86 | 2015-03-27 08:01:38 +0100 | [diff] [blame] | 1870 | CONFIG_LCD_ROTATION |
| 1871 | |
| 1872 | Sometimes, for example if the display is mounted in portrait |
| 1873 | mode or even if it's mounted landscape but rotated by 180degree, |
| 1874 | we need to rotate our content of the display relative to the |
| 1875 | framebuffer, so that user can read the messages which are |
| 1876 | printed out. |
| 1877 | Once CONFIG_LCD_ROTATION is defined, the lcd_console will be |
| 1878 | initialized with a given rotation from "vl_rot" out of |
| 1879 | "vidinfo_t" which is provided by the board specific code. |
| 1880 | The value for vl_rot is coded as following (matching to |
| 1881 | fbcon=rotate:<n> linux-kernel commandline): |
| 1882 | 0 = no rotation respectively 0 degree |
| 1883 | 1 = 90 degree rotation |
| 1884 | 2 = 180 degree rotation |
| 1885 | 3 = 270 degree rotation |
| 1886 | |
| 1887 | If CONFIG_LCD_ROTATION is not defined, the console will be |
| 1888 | initialized with 0degree rotation. |
| 1889 | |
Tom Wai-Hong Tam | 79926a4 | 2012-09-28 15:11:16 +0000 | [diff] [blame] | 1890 | CONFIG_LCD_BMP_RLE8 |
| 1891 | |
| 1892 | Support drawing of RLE8-compressed bitmaps on the LCD. |
| 1893 | |
Tom Wai-Hong Tam | 6664f20 | 2012-12-05 14:46:40 +0000 | [diff] [blame] | 1894 | CONFIG_I2C_EDID |
| 1895 | |
| 1896 | Enables an 'i2c edid' command which can read EDID |
| 1897 | information over I2C from an attached LCD display. |
| 1898 | |
wdenk | eb20ad3 | 2003-09-05 23:19:14 +0000 | [diff] [blame] | 1899 | - Splash Screen Support: CONFIG_SPLASH_SCREEN |
wdenk | 92bbe3f | 2003-04-20 14:04:18 +0000 | [diff] [blame] | 1900 | |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 1901 | If this option is set, the environment is checked for |
| 1902 | a variable "splashimage". If found, the usual display |
| 1903 | of logo, copyright and system information on the LCD |
wdenk | 0168663 | 2004-06-30 22:59:18 +0000 | [diff] [blame] | 1904 | is suppressed and the BMP image at the address |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 1905 | specified in "splashimage" is loaded instead. The |
| 1906 | console is redirected to the "nulldev", too. This |
| 1907 | allows for a "silent" boot where a splash screen is |
| 1908 | loaded very quickly after power-on. |
wdenk | 92bbe3f | 2003-04-20 14:04:18 +0000 | [diff] [blame] | 1909 | |
Nikita Kiryanov | 2f3e2ca | 2013-02-24 21:28:43 +0000 | [diff] [blame] | 1910 | CONFIG_SPLASHIMAGE_GUARD |
| 1911 | |
| 1912 | If this option is set, then U-Boot will prevent the environment |
| 1913 | variable "splashimage" from being set to a problematic address |
Fabio Estevam | a58b491 | 2016-03-23 12:46:12 -0300 | [diff] [blame] | 1914 | (see doc/README.displaying-bmps). |
Nikita Kiryanov | 2f3e2ca | 2013-02-24 21:28:43 +0000 | [diff] [blame] | 1915 | This option is useful for targets where, due to alignment |
| 1916 | restrictions, an improperly aligned BMP image will cause a data |
| 1917 | abort. If you think you will not have problems with unaligned |
| 1918 | accesses (for example because your toolchain prevents them) |
| 1919 | there is no need to set this option. |
| 1920 | |
Matthias Weisser | 5388418 | 2009-07-09 16:07:30 +0200 | [diff] [blame] | 1921 | CONFIG_SPLASH_SCREEN_ALIGN |
| 1922 | |
| 1923 | If this option is set the splash image can be freely positioned |
| 1924 | on the screen. Environment variable "splashpos" specifies the |
| 1925 | position as "x,y". If a positive number is given it is used as |
| 1926 | number of pixel from left/top. If a negative number is given it |
| 1927 | is used as number of pixel from right/bottom. You can also |
| 1928 | specify 'm' for centering the image. |
| 1929 | |
| 1930 | Example: |
| 1931 | setenv splashpos m,m |
| 1932 | => image at center of screen |
| 1933 | |
| 1934 | setenv splashpos 30,20 |
| 1935 | => image at x = 30 and y = 20 |
| 1936 | |
| 1937 | setenv splashpos -10,m |
| 1938 | => vertically centered image |
| 1939 | at x = dspWidth - bmpWidth - 9 |
| 1940 | |
Stefan Roese | d9d9774 | 2005-09-22 09:04:17 +0200 | [diff] [blame] | 1941 | - Gzip compressed BMP image support: CONFIG_VIDEO_BMP_GZIP |
| 1942 | |
| 1943 | If this option is set, additionally to standard BMP |
| 1944 | images, gzipped BMP images can be displayed via the |
| 1945 | splashscreen support or the bmp command. |
| 1946 | |
Anatolij Gustschin | 6b4e4fc | 2010-03-15 14:50:25 +0100 | [diff] [blame] | 1947 | - Run length encoded BMP image (RLE8) support: CONFIG_VIDEO_BMP_RLE8 |
| 1948 | |
| 1949 | If this option is set, 8-bit RLE compressed BMP images |
| 1950 | can be displayed via the splashscreen support or the |
| 1951 | bmp command. |
| 1952 | |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 1953 | - Do compressing for memory range: |
Lei Wen | e4e248d | 2012-09-28 04:26:47 +0000 | [diff] [blame] | 1954 | CONFIG_CMD_ZIP |
| 1955 | |
| 1956 | If this option is set, it would use zlib deflate method |
| 1957 | to compress the specified memory at its best effort. |
| 1958 | |
wdenk | 710e350 | 2003-08-29 20:57:53 +0000 | [diff] [blame] | 1959 | - Compression support: |
Kees Cook | 5b06e64 | 2013-08-16 07:59:12 -0700 | [diff] [blame] | 1960 | CONFIG_GZIP |
| 1961 | |
| 1962 | Enabled by default to support gzip compressed images. |
| 1963 | |
wdenk | 710e350 | 2003-08-29 20:57:53 +0000 | [diff] [blame] | 1964 | CONFIG_BZIP2 |
| 1965 | |
| 1966 | If this option is set, support for bzip2 compressed |
| 1967 | images is included. If not, only uncompressed and gzip |
| 1968 | compressed images are supported. |
| 1969 | |
wdenk | 9c53f40 | 2003-10-15 23:53:47 +0000 | [diff] [blame] | 1970 | NOTE: the bzip2 algorithm requires a lot of RAM, so |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 1971 | the malloc area (as defined by CONFIG_SYS_MALLOC_LEN) should |
wdenk | 9c53f40 | 2003-10-15 23:53:47 +0000 | [diff] [blame] | 1972 | be at least 4MB. |
wdenk | 92bbe3f | 2003-04-20 14:04:18 +0000 | [diff] [blame] | 1973 | |
Luigi 'Comio' Mantellini | 35afc06 | 2008-09-08 02:46:13 +0200 | [diff] [blame] | 1974 | CONFIG_LZMA |
| 1975 | |
| 1976 | If this option is set, support for lzma compressed |
| 1977 | images is included. |
| 1978 | |
| 1979 | Note: The LZMA algorithm adds between 2 and 4KB of code and it |
| 1980 | requires an amount of dynamic memory that is given by the |
| 1981 | formula: |
| 1982 | |
| 1983 | (1846 + 768 << (lc + lp)) * sizeof(uint16) |
| 1984 | |
| 1985 | Where lc and lp stand for, respectively, Literal context bits |
| 1986 | and Literal pos bits. |
| 1987 | |
| 1988 | This value is upper-bounded by 14MB in the worst case. Anyway, |
| 1989 | for a ~4MB large kernel image, we have lc=3 and lp=0 for a |
| 1990 | total amount of (1846 + 768 << (3 + 0)) * 2 = ~41KB... that is |
| 1991 | a very small buffer. |
| 1992 | |
| 1993 | Use the lzmainfo tool to determinate the lc and lp values and |
| 1994 | then calculate the amount of needed dynamic memory (ensuring |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 1995 | the appropriate CONFIG_SYS_MALLOC_LEN value). |
Luigi 'Comio' Mantellini | 35afc06 | 2008-09-08 02:46:13 +0200 | [diff] [blame] | 1996 | |
Kees Cook | 5b06e64 | 2013-08-16 07:59:12 -0700 | [diff] [blame] | 1997 | CONFIG_LZO |
| 1998 | |
| 1999 | If this option is set, support for LZO compressed images |
| 2000 | is included. |
| 2001 | |
wdenk | 0e2bd9c | 2004-06-06 21:51:03 +0000 | [diff] [blame] | 2002 | - MII/PHY support: |
| 2003 | CONFIG_PHY_ADDR |
| 2004 | |
| 2005 | The address of PHY on MII bus. |
| 2006 | |
| 2007 | CONFIG_PHY_CLOCK_FREQ (ppc4xx) |
| 2008 | |
| 2009 | The clock frequency of the MII bus |
| 2010 | |
| 2011 | CONFIG_PHY_GIGE |
| 2012 | |
| 2013 | If this option is set, support for speed/duplex |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 2014 | detection of gigabit PHY is included. |
wdenk | 0e2bd9c | 2004-06-06 21:51:03 +0000 | [diff] [blame] | 2015 | |
| 2016 | CONFIG_PHY_RESET_DELAY |
| 2017 | |
| 2018 | Some PHY like Intel LXT971A need extra delay after |
| 2019 | reset before any MII register access is possible. |
| 2020 | For such PHY, set this option to the usec delay |
| 2021 | required. (minimum 300usec for LXT971A) |
| 2022 | |
| 2023 | CONFIG_PHY_CMD_DELAY (ppc4xx) |
| 2024 | |
| 2025 | Some PHY like Intel LXT971A need extra delay after |
| 2026 | command issued before MII status register can be read |
| 2027 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2028 | - IP address: |
| 2029 | CONFIG_IPADDR |
| 2030 | |
| 2031 | Define a default value for the IP address to use for |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 2032 | the default Ethernet interface, in case this is not |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2033 | determined through e.g. bootp. |
Wolfgang Denk | 26da299 | 2011-10-26 10:21:22 +0000 | [diff] [blame] | 2034 | (Environment variable "ipaddr") |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2035 | |
| 2036 | - Server IP address: |
| 2037 | CONFIG_SERVERIP |
| 2038 | |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 2039 | Defines a default value for the IP address of a TFTP |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2040 | server to contact when using the "tftboot" command. |
Wolfgang Denk | 26da299 | 2011-10-26 10:21:22 +0000 | [diff] [blame] | 2041 | (Environment variable "serverip") |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2042 | |
Robin Getz | 470a6d4 | 2009-07-21 12:15:28 -0400 | [diff] [blame] | 2043 | CONFIG_KEEP_SERVERADDR |
| 2044 | |
| 2045 | Keeps the server's MAC address, in the env 'serveraddr' |
| 2046 | for passing to bootargs (like Linux's netconsole option) |
| 2047 | |
Wolfgang Denk | 26da299 | 2011-10-26 10:21:22 +0000 | [diff] [blame] | 2048 | - Gateway IP address: |
| 2049 | CONFIG_GATEWAYIP |
| 2050 | |
| 2051 | Defines a default value for the IP address of the |
| 2052 | default router where packets to other networks are |
| 2053 | sent to. |
| 2054 | (Environment variable "gatewayip") |
| 2055 | |
| 2056 | - Subnet mask: |
| 2057 | CONFIG_NETMASK |
| 2058 | |
| 2059 | Defines a default value for the subnet mask (or |
| 2060 | routing prefix) which is used to determine if an IP |
| 2061 | address belongs to the local subnet or needs to be |
| 2062 | forwarded through a router. |
| 2063 | (Environment variable "netmask") |
| 2064 | |
David Updegraff | 7280da7 | 2007-06-11 10:41:07 -0500 | [diff] [blame] | 2065 | - Multicast TFTP Mode: |
| 2066 | CONFIG_MCAST_TFTP |
| 2067 | |
| 2068 | Defines whether you want to support multicast TFTP as per |
| 2069 | rfc-2090; for example to work with atftp. Lets lots of targets |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 2070 | tftp down the same boot image concurrently. Note: the Ethernet |
David Updegraff | 7280da7 | 2007-06-11 10:41:07 -0500 | [diff] [blame] | 2071 | driver in use must provide a function: mcast() to join/leave a |
| 2072 | multicast group. |
| 2073 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2074 | - BOOTP Recovery Mode: |
| 2075 | CONFIG_BOOTP_RANDOM_DELAY |
| 2076 | |
| 2077 | If you have many targets in a network that try to |
| 2078 | boot using BOOTP, you may want to avoid that all |
| 2079 | systems send out BOOTP requests at precisely the same |
| 2080 | moment (which would happen for instance at recovery |
| 2081 | from a power failure, when all systems will try to |
| 2082 | boot, thus flooding the BOOTP server. Defining |
| 2083 | CONFIG_BOOTP_RANDOM_DELAY causes a random delay to be |
| 2084 | inserted before sending out BOOTP requests. The |
Wolfgang Denk | b65aaf9 | 2007-08-06 23:21:05 +0200 | [diff] [blame] | 2085 | following delays are inserted then: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2086 | |
| 2087 | 1st BOOTP request: delay 0 ... 1 sec |
| 2088 | 2nd BOOTP request: delay 0 ... 2 sec |
| 2089 | 3rd BOOTP request: delay 0 ... 4 sec |
| 2090 | 4th and following |
| 2091 | BOOTP requests: delay 0 ... 8 sec |
| 2092 | |
Thierry Reding | 8977cda | 2014-08-19 10:21:24 +0200 | [diff] [blame] | 2093 | CONFIG_BOOTP_ID_CACHE_SIZE |
| 2094 | |
| 2095 | BOOTP packets are uniquely identified using a 32-bit ID. The |
| 2096 | server will copy the ID from client requests to responses and |
| 2097 | U-Boot will use this to determine if it is the destination of |
| 2098 | an incoming response. Some servers will check that addresses |
| 2099 | aren't in use before handing them out (usually using an ARP |
| 2100 | ping) and therefore take up to a few hundred milliseconds to |
| 2101 | respond. Network congestion may also influence the time it |
| 2102 | takes for a response to make it back to the client. If that |
| 2103 | time is too long, U-Boot will retransmit requests. In order |
| 2104 | to allow earlier responses to still be accepted after these |
| 2105 | retransmissions, U-Boot's BOOTP client keeps a small cache of |
| 2106 | IDs. The CONFIG_BOOTP_ID_CACHE_SIZE controls the size of this |
| 2107 | cache. The default is to keep IDs for up to four outstanding |
| 2108 | requests. Increasing this will allow U-Boot to accept offers |
| 2109 | from a BOOTP client in networks with unusually high latency. |
| 2110 | |
stroese | e0aadfb | 2003-08-28 14:17:32 +0000 | [diff] [blame] | 2111 | - DHCP Advanced Options: |
Jon Loeliger | 5336a76 | 2007-07-09 22:08:34 -0500 | [diff] [blame] | 2112 | You can fine tune the DHCP functionality by defining |
| 2113 | CONFIG_BOOTP_* symbols: |
stroese | e0aadfb | 2003-08-28 14:17:32 +0000 | [diff] [blame] | 2114 | |
Jon Loeliger | 5336a76 | 2007-07-09 22:08:34 -0500 | [diff] [blame] | 2115 | CONFIG_BOOTP_SUBNETMASK |
| 2116 | CONFIG_BOOTP_GATEWAY |
| 2117 | CONFIG_BOOTP_HOSTNAME |
| 2118 | CONFIG_BOOTP_NISDOMAIN |
| 2119 | CONFIG_BOOTP_BOOTPATH |
| 2120 | CONFIG_BOOTP_BOOTFILESIZE |
| 2121 | CONFIG_BOOTP_DNS |
| 2122 | CONFIG_BOOTP_DNS2 |
| 2123 | CONFIG_BOOTP_SEND_HOSTNAME |
| 2124 | CONFIG_BOOTP_NTPSERVER |
| 2125 | CONFIG_BOOTP_TIMEOFFSET |
| 2126 | CONFIG_BOOTP_VENDOREX |
Joe Hershberger | 8ca7fa0 | 2012-05-23 07:59:19 +0000 | [diff] [blame] | 2127 | CONFIG_BOOTP_MAY_FAIL |
stroese | e0aadfb | 2003-08-28 14:17:32 +0000 | [diff] [blame] | 2128 | |
Wilson Callan | 22bcd6e | 2007-07-28 10:56:13 -0400 | [diff] [blame] | 2129 | CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip |
| 2130 | environment variable, not the BOOTP server. |
stroese | e0aadfb | 2003-08-28 14:17:32 +0000 | [diff] [blame] | 2131 | |
Joe Hershberger | 8ca7fa0 | 2012-05-23 07:59:19 +0000 | [diff] [blame] | 2132 | CONFIG_BOOTP_MAY_FAIL - If the DHCP server is not found |
| 2133 | after the configured retry count, the call will fail |
| 2134 | instead of starting over. This can be used to fail over |
| 2135 | to Link-local IP address configuration if the DHCP server |
| 2136 | is not available. |
| 2137 | |
stroese | e0aadfb | 2003-08-28 14:17:32 +0000 | [diff] [blame] | 2138 | CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS |
| 2139 | serverip from a DHCP server, it is possible that more |
| 2140 | than one DNS serverip is offered to the client. |
| 2141 | If CONFIG_BOOTP_DNS2 is enabled, the secondary DNS |
| 2142 | serverip will be stored in the additional environment |
| 2143 | variable "dnsip2". The first DNS serverip is always |
| 2144 | stored in the variable "dnsip", when CONFIG_BOOTP_DNS |
Jon Loeliger | 5336a76 | 2007-07-09 22:08:34 -0500 | [diff] [blame] | 2145 | is defined. |
stroese | e0aadfb | 2003-08-28 14:17:32 +0000 | [diff] [blame] | 2146 | |
| 2147 | CONFIG_BOOTP_SEND_HOSTNAME - Some DHCP servers are capable |
| 2148 | to do a dynamic update of a DNS server. To do this, they |
| 2149 | need the hostname of the DHCP requester. |
Wilson Callan | 22bcd6e | 2007-07-28 10:56:13 -0400 | [diff] [blame] | 2150 | If CONFIG_BOOTP_SEND_HOSTNAME is defined, the content |
Jon Loeliger | 5336a76 | 2007-07-09 22:08:34 -0500 | [diff] [blame] | 2151 | of the "hostname" environment variable is passed as |
| 2152 | option 12 to the DHCP server. |
stroese | e0aadfb | 2003-08-28 14:17:32 +0000 | [diff] [blame] | 2153 | |
Aras Vaichas | 72aa3f3 | 2008-03-26 09:43:57 +1100 | [diff] [blame] | 2154 | CONFIG_BOOTP_DHCP_REQUEST_DELAY |
| 2155 | |
| 2156 | A 32bit value in microseconds for a delay between |
| 2157 | receiving a "DHCP Offer" and sending the "DHCP Request". |
| 2158 | This fixes a problem with certain DHCP servers that don't |
| 2159 | respond 100% of the time to a "DHCP request". E.g. On an |
| 2160 | AT91RM9200 processor running at 180MHz, this delay needed |
| 2161 | to be *at least* 15,000 usec before a Windows Server 2003 |
| 2162 | DHCP server would reply 100% of the time. I recommend at |
| 2163 | least 50,000 usec to be safe. The alternative is to hope |
| 2164 | that one of the retries will be successful but note that |
| 2165 | the DHCP timeout and retry process takes a longer than |
| 2166 | this delay. |
| 2167 | |
Joe Hershberger | b35a3a6 | 2012-05-23 08:00:12 +0000 | [diff] [blame] | 2168 | - Link-local IP address negotiation: |
| 2169 | Negotiate with other link-local clients on the local network |
| 2170 | for an address that doesn't require explicit configuration. |
| 2171 | This is especially useful if a DHCP server cannot be guaranteed |
| 2172 | to exist in all environments that the device must operate. |
| 2173 | |
| 2174 | See doc/README.link-local for more information. |
| 2175 | |
wdenk | 145d2c1 | 2004-04-15 21:48:45 +0000 | [diff] [blame] | 2176 | - CDP Options: |
wdenk | 0593920 | 2004-04-18 17:39:38 +0000 | [diff] [blame] | 2177 | CONFIG_CDP_DEVICE_ID |
wdenk | 145d2c1 | 2004-04-15 21:48:45 +0000 | [diff] [blame] | 2178 | |
| 2179 | The device id used in CDP trigger frames. |
| 2180 | |
| 2181 | CONFIG_CDP_DEVICE_ID_PREFIX |
| 2182 | |
| 2183 | A two character string which is prefixed to the MAC address |
| 2184 | of the device. |
| 2185 | |
| 2186 | CONFIG_CDP_PORT_ID |
| 2187 | |
| 2188 | A printf format string which contains the ascii name of |
| 2189 | the port. Normally is set to "eth%d" which sets |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 2190 | eth0 for the first Ethernet, eth1 for the second etc. |
wdenk | 145d2c1 | 2004-04-15 21:48:45 +0000 | [diff] [blame] | 2191 | |
| 2192 | CONFIG_CDP_CAPABILITIES |
| 2193 | |
| 2194 | A 32bit integer which indicates the device capabilities; |
| 2195 | 0x00000010 for a normal host which does not forwards. |
| 2196 | |
| 2197 | CONFIG_CDP_VERSION |
| 2198 | |
| 2199 | An ascii string containing the version of the software. |
| 2200 | |
| 2201 | CONFIG_CDP_PLATFORM |
| 2202 | |
| 2203 | An ascii string containing the name of the platform. |
| 2204 | |
| 2205 | CONFIG_CDP_TRIGGER |
| 2206 | |
| 2207 | A 32bit integer sent on the trigger. |
| 2208 | |
| 2209 | CONFIG_CDP_POWER_CONSUMPTION |
| 2210 | |
| 2211 | A 16bit integer containing the power consumption of the |
| 2212 | device in .1 of milliwatts. |
| 2213 | |
| 2214 | CONFIG_CDP_APPLIANCE_VLAN_TYPE |
| 2215 | |
| 2216 | A byte containing the id of the VLAN. |
| 2217 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2218 | - Status LED: CONFIG_STATUS_LED |
| 2219 | |
| 2220 | Several configurations allow to display the current |
| 2221 | status using a LED. For instance, the LED will blink |
| 2222 | fast while running U-Boot code, stop blinking as |
| 2223 | soon as a reply to a BOOTP request was received, and |
| 2224 | start blinking slow once the Linux kernel is running |
| 2225 | (supported by a status LED driver in the Linux |
| 2226 | kernel). Defining CONFIG_STATUS_LED enables this |
| 2227 | feature in U-Boot. |
| 2228 | |
Igor Grinberg | 4997a9e | 2013-11-08 01:03:50 +0200 | [diff] [blame] | 2229 | Additional options: |
| 2230 | |
| 2231 | CONFIG_GPIO_LED |
| 2232 | The status LED can be connected to a GPIO pin. |
| 2233 | In such cases, the gpio_led driver can be used as a |
| 2234 | status LED backend implementation. Define CONFIG_GPIO_LED |
| 2235 | to include the gpio_led driver in the U-Boot binary. |
| 2236 | |
Igor Grinberg | 203bd9f | 2013-11-08 01:03:52 +0200 | [diff] [blame] | 2237 | CONFIG_GPIO_LED_INVERTED_TABLE |
| 2238 | Some GPIO connected LEDs may have inverted polarity in which |
| 2239 | case the GPIO high value corresponds to LED off state and |
| 2240 | GPIO low value corresponds to LED on state. |
| 2241 | In such cases CONFIG_GPIO_LED_INVERTED_TABLE may be defined |
| 2242 | with a list of GPIO LEDs that have inverted polarity. |
| 2243 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2244 | - CAN Support: CONFIG_CAN_DRIVER |
| 2245 | |
| 2246 | Defining CONFIG_CAN_DRIVER enables CAN driver support |
| 2247 | on those systems that support this (optional) |
| 2248 | feature, like the TQM8xxL modules. |
| 2249 | |
Heiko Schocher | e0e55bc | 2012-01-16 21:12:24 +0000 | [diff] [blame] | 2250 | - I2C Support: CONFIG_SYS_I2C |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2251 | |
Heiko Schocher | e0e55bc | 2012-01-16 21:12:24 +0000 | [diff] [blame] | 2252 | This enable the NEW i2c subsystem, and will allow you to use |
| 2253 | i2c commands at the u-boot command line (as long as you set |
| 2254 | CONFIG_CMD_I2C in CONFIG_COMMANDS) and communicate with i2c |
| 2255 | based realtime clock chips or other i2c devices. See |
| 2256 | common/cmd_i2c.c for a description of the command line |
| 2257 | interface. |
| 2258 | |
| 2259 | ported i2c driver to the new framework: |
Heiko Schocher | 479a4cf | 2013-01-29 08:53:15 +0100 | [diff] [blame] | 2260 | - drivers/i2c/soft_i2c.c: |
| 2261 | - activate first bus with CONFIG_SYS_I2C_SOFT define |
| 2262 | CONFIG_SYS_I2C_SOFT_SPEED and CONFIG_SYS_I2C_SOFT_SLAVE |
| 2263 | for defining speed and slave address |
| 2264 | - activate second bus with I2C_SOFT_DECLARATIONS2 define |
| 2265 | CONFIG_SYS_I2C_SOFT_SPEED_2 and CONFIG_SYS_I2C_SOFT_SLAVE_2 |
| 2266 | for defining speed and slave address |
| 2267 | - activate third bus with I2C_SOFT_DECLARATIONS3 define |
| 2268 | CONFIG_SYS_I2C_SOFT_SPEED_3 and CONFIG_SYS_I2C_SOFT_SLAVE_3 |
| 2269 | for defining speed and slave address |
| 2270 | - activate fourth bus with I2C_SOFT_DECLARATIONS4 define |
| 2271 | CONFIG_SYS_I2C_SOFT_SPEED_4 and CONFIG_SYS_I2C_SOFT_SLAVE_4 |
| 2272 | for defining speed and slave address |
Heiko Schocher | e0e55bc | 2012-01-16 21:12:24 +0000 | [diff] [blame] | 2273 | |
Heiko Schocher | f285074 | 2012-10-24 13:48:22 +0200 | [diff] [blame] | 2274 | - drivers/i2c/fsl_i2c.c: |
| 2275 | - activate i2c driver with CONFIG_SYS_I2C_FSL |
| 2276 | define CONFIG_SYS_FSL_I2C_OFFSET for setting the register |
| 2277 | offset CONFIG_SYS_FSL_I2C_SPEED for the i2c speed and |
| 2278 | CONFIG_SYS_FSL_I2C_SLAVE for the slave addr of the first |
| 2279 | bus. |
Wolfgang Denk | ec7fbf5 | 2013-10-04 17:43:24 +0200 | [diff] [blame] | 2280 | - If your board supports a second fsl i2c bus, define |
Heiko Schocher | f285074 | 2012-10-24 13:48:22 +0200 | [diff] [blame] | 2281 | CONFIG_SYS_FSL_I2C2_OFFSET for the register offset |
| 2282 | CONFIG_SYS_FSL_I2C2_SPEED for the speed and |
| 2283 | CONFIG_SYS_FSL_I2C2_SLAVE for the slave address of the |
| 2284 | second bus. |
| 2285 | |
Simon Glass | 026fefb | 2012-10-30 07:28:53 +0000 | [diff] [blame] | 2286 | - drivers/i2c/tegra_i2c.c: |
Nobuhiro Iwamatsu | 045acfa | 2013-10-11 16:23:53 +0900 | [diff] [blame] | 2287 | - activate this driver with CONFIG_SYS_I2C_TEGRA |
| 2288 | - This driver adds 4 i2c buses with a fix speed from |
| 2289 | 100000 and the slave addr 0! |
Simon Glass | 026fefb | 2012-10-30 07:28:53 +0000 | [diff] [blame] | 2290 | |
Dirk Eibach | 42b204f | 2013-04-25 02:40:01 +0000 | [diff] [blame] | 2291 | - drivers/i2c/ppc4xx_i2c.c |
| 2292 | - activate this driver with CONFIG_SYS_I2C_PPC4XX |
| 2293 | - CONFIG_SYS_I2C_PPC4XX_CH0 activate hardware channel 0 |
| 2294 | - CONFIG_SYS_I2C_PPC4XX_CH1 activate hardware channel 1 |
| 2295 | |
trem | a49f40a | 2013-09-21 18:13:35 +0200 | [diff] [blame] | 2296 | - drivers/i2c/i2c_mxc.c |
| 2297 | - activate this driver with CONFIG_SYS_I2C_MXC |
Albert ARIBAUD \\(3ADEV\\) | eb94387 | 2015-09-21 22:43:38 +0200 | [diff] [blame] | 2298 | - enable bus 1 with CONFIG_SYS_I2C_MXC_I2C1 |
| 2299 | - enable bus 2 with CONFIG_SYS_I2C_MXC_I2C2 |
| 2300 | - enable bus 3 with CONFIG_SYS_I2C_MXC_I2C3 |
| 2301 | - enable bus 4 with CONFIG_SYS_I2C_MXC_I2C4 |
trem | a49f40a | 2013-09-21 18:13:35 +0200 | [diff] [blame] | 2302 | - define speed for bus 1 with CONFIG_SYS_MXC_I2C1_SPEED |
| 2303 | - define slave for bus 1 with CONFIG_SYS_MXC_I2C1_SLAVE |
| 2304 | - define speed for bus 2 with CONFIG_SYS_MXC_I2C2_SPEED |
| 2305 | - define slave for bus 2 with CONFIG_SYS_MXC_I2C2_SLAVE |
| 2306 | - define speed for bus 3 with CONFIG_SYS_MXC_I2C3_SPEED |
| 2307 | - define slave for bus 3 with CONFIG_SYS_MXC_I2C3_SLAVE |
Albert ARIBAUD \\(3ADEV\\) | eb94387 | 2015-09-21 22:43:38 +0200 | [diff] [blame] | 2308 | - define speed for bus 4 with CONFIG_SYS_MXC_I2C4_SPEED |
| 2309 | - define slave for bus 4 with CONFIG_SYS_MXC_I2C4_SLAVE |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 2310 | If those defines are not set, default value is 100000 |
trem | a49f40a | 2013-09-21 18:13:35 +0200 | [diff] [blame] | 2311 | for speed, and 0 for slave. |
| 2312 | |
Nobuhiro Iwamatsu | e94ea2f | 2013-09-27 16:58:30 +0900 | [diff] [blame] | 2313 | - drivers/i2c/rcar_i2c.c: |
| 2314 | - activate this driver with CONFIG_SYS_I2C_RCAR |
| 2315 | - This driver adds 4 i2c buses |
| 2316 | |
| 2317 | - CONFIG_SYS_RCAR_I2C0_BASE for setting the register channel 0 |
| 2318 | - CONFIG_SYS_RCAR_I2C0_SPEED for for the speed channel 0 |
| 2319 | - CONFIG_SYS_RCAR_I2C1_BASE for setting the register channel 1 |
| 2320 | - CONFIG_SYS_RCAR_I2C1_SPEED for for the speed channel 1 |
| 2321 | - CONFIG_SYS_RCAR_I2C2_BASE for setting the register channel 2 |
| 2322 | - CONFIG_SYS_RCAR_I2C2_SPEED for for the speed channel 2 |
| 2323 | - CONFIG_SYS_RCAR_I2C3_BASE for setting the register channel 3 |
| 2324 | - CONFIG_SYS_RCAR_I2C3_SPEED for for the speed channel 3 |
| 2325 | - CONFIF_SYS_RCAR_I2C_NUM_CONTROLLERS for number of i2c buses |
| 2326 | |
Nobuhiro Iwamatsu | 1224010 | 2013-10-29 13:33:51 +0900 | [diff] [blame] | 2327 | - drivers/i2c/sh_i2c.c: |
| 2328 | - activate this driver with CONFIG_SYS_I2C_SH |
| 2329 | - This driver adds from 2 to 5 i2c buses |
| 2330 | |
| 2331 | - CONFIG_SYS_I2C_SH_BASE0 for setting the register channel 0 |
| 2332 | - CONFIG_SYS_I2C_SH_SPEED0 for for the speed channel 0 |
| 2333 | - CONFIG_SYS_I2C_SH_BASE1 for setting the register channel 1 |
| 2334 | - CONFIG_SYS_I2C_SH_SPEED1 for for the speed channel 1 |
| 2335 | - CONFIG_SYS_I2C_SH_BASE2 for setting the register channel 2 |
| 2336 | - CONFIG_SYS_I2C_SH_SPEED2 for for the speed channel 2 |
| 2337 | - CONFIG_SYS_I2C_SH_BASE3 for setting the register channel 3 |
| 2338 | - CONFIG_SYS_I2C_SH_SPEED3 for for the speed channel 3 |
| 2339 | - CONFIG_SYS_I2C_SH_BASE4 for setting the register channel 4 |
| 2340 | - CONFIG_SYS_I2C_SH_SPEED4 for for the speed channel 4 |
| 2341 | - CONFIG_SYS_I2C_SH_BASE5 for setting the register channel 5 |
| 2342 | - CONFIG_SYS_I2C_SH_SPEED5 for for the speed channel 5 |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 2343 | - CONFIG_SYS_I2C_SH_NUM_CONTROLLERS for number of i2c buses |
Nobuhiro Iwamatsu | 1224010 | 2013-10-29 13:33:51 +0900 | [diff] [blame] | 2344 | |
Heiko Schocher | f53f2b8 | 2013-10-22 11:03:18 +0200 | [diff] [blame] | 2345 | - drivers/i2c/omap24xx_i2c.c |
| 2346 | - activate this driver with CONFIG_SYS_I2C_OMAP24XX |
| 2347 | - CONFIG_SYS_OMAP24_I2C_SPEED speed channel 0 |
| 2348 | - CONFIG_SYS_OMAP24_I2C_SLAVE slave addr channel 0 |
| 2349 | - CONFIG_SYS_OMAP24_I2C_SPEED1 speed channel 1 |
| 2350 | - CONFIG_SYS_OMAP24_I2C_SLAVE1 slave addr channel 1 |
| 2351 | - CONFIG_SYS_OMAP24_I2C_SPEED2 speed channel 2 |
| 2352 | - CONFIG_SYS_OMAP24_I2C_SLAVE2 slave addr channel 2 |
| 2353 | - CONFIG_SYS_OMAP24_I2C_SPEED3 speed channel 3 |
| 2354 | - CONFIG_SYS_OMAP24_I2C_SLAVE3 slave addr channel 3 |
| 2355 | - CONFIG_SYS_OMAP24_I2C_SPEED4 speed channel 4 |
| 2356 | - CONFIG_SYS_OMAP24_I2C_SLAVE4 slave addr channel 4 |
| 2357 | |
Heiko Schocher | 465819a | 2013-11-08 07:30:53 +0100 | [diff] [blame] | 2358 | - drivers/i2c/zynq_i2c.c |
| 2359 | - activate this driver with CONFIG_SYS_I2C_ZYNQ |
| 2360 | - set CONFIG_SYS_I2C_ZYNQ_SPEED for speed setting |
| 2361 | - set CONFIG_SYS_I2C_ZYNQ_SLAVE for slave addr |
| 2362 | |
Naveen Krishna Ch | 5d5efd3 | 2013-12-06 12:12:38 +0530 | [diff] [blame] | 2363 | - drivers/i2c/s3c24x0_i2c.c: |
| 2364 | - activate this driver with CONFIG_SYS_I2C_S3C24X0 |
| 2365 | - This driver adds i2c buses (11 for Exynos5250, Exynos5420 |
| 2366 | 9 i2c buses for Exynos4 and 1 for S3C24X0 SoCs from Samsung) |
| 2367 | with a fix speed from 100000 and the slave addr 0! |
| 2368 | |
Dirk Eibach | b957743 | 2014-07-03 09:28:18 +0200 | [diff] [blame] | 2369 | - drivers/i2c/ihs_i2c.c |
| 2370 | - activate this driver with CONFIG_SYS_I2C_IHS |
| 2371 | - CONFIG_SYS_I2C_IHS_CH0 activate hardware channel 0 |
| 2372 | - CONFIG_SYS_I2C_IHS_SPEED_0 speed channel 0 |
| 2373 | - CONFIG_SYS_I2C_IHS_SLAVE_0 slave addr channel 0 |
| 2374 | - CONFIG_SYS_I2C_IHS_CH1 activate hardware channel 1 |
| 2375 | - CONFIG_SYS_I2C_IHS_SPEED_1 speed channel 1 |
| 2376 | - CONFIG_SYS_I2C_IHS_SLAVE_1 slave addr channel 1 |
| 2377 | - CONFIG_SYS_I2C_IHS_CH2 activate hardware channel 2 |
| 2378 | - CONFIG_SYS_I2C_IHS_SPEED_2 speed channel 2 |
| 2379 | - CONFIG_SYS_I2C_IHS_SLAVE_2 slave addr channel 2 |
| 2380 | - CONFIG_SYS_I2C_IHS_CH3 activate hardware channel 3 |
| 2381 | - CONFIG_SYS_I2C_IHS_SPEED_3 speed channel 3 |
| 2382 | - CONFIG_SYS_I2C_IHS_SLAVE_3 slave addr channel 3 |
Dirk Eibach | 9ac3385 | 2015-10-28 11:46:22 +0100 | [diff] [blame] | 2383 | - activate dual channel with CONFIG_SYS_I2C_IHS_DUAL |
| 2384 | - CONFIG_SYS_I2C_IHS_SPEED_0_1 speed channel 0_1 |
| 2385 | - CONFIG_SYS_I2C_IHS_SLAVE_0_1 slave addr channel 0_1 |
| 2386 | - CONFIG_SYS_I2C_IHS_SPEED_1_1 speed channel 1_1 |
| 2387 | - CONFIG_SYS_I2C_IHS_SLAVE_1_1 slave addr channel 1_1 |
| 2388 | - CONFIG_SYS_I2C_IHS_SPEED_2_1 speed channel 2_1 |
| 2389 | - CONFIG_SYS_I2C_IHS_SLAVE_2_1 slave addr channel 2_1 |
| 2390 | - CONFIG_SYS_I2C_IHS_SPEED_3_1 speed channel 3_1 |
| 2391 | - CONFIG_SYS_I2C_IHS_SLAVE_3_1 slave addr channel 3_1 |
Dirk Eibach | b957743 | 2014-07-03 09:28:18 +0200 | [diff] [blame] | 2392 | |
Heiko Schocher | e0e55bc | 2012-01-16 21:12:24 +0000 | [diff] [blame] | 2393 | additional defines: |
| 2394 | |
| 2395 | CONFIG_SYS_NUM_I2C_BUSES |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 2396 | Hold the number of i2c buses you want to use. If you |
Heiko Schocher | e0e55bc | 2012-01-16 21:12:24 +0000 | [diff] [blame] | 2397 | don't use/have i2c muxes on your i2c bus, this |
| 2398 | is equal to CONFIG_SYS_NUM_I2C_ADAPTERS, and you can |
| 2399 | omit this define. |
| 2400 | |
| 2401 | CONFIG_SYS_I2C_DIRECT_BUS |
| 2402 | define this, if you don't use i2c muxes on your hardware. |
| 2403 | if CONFIG_SYS_I2C_MAX_HOPS is not defined or == 0 you can |
| 2404 | omit this define. |
| 2405 | |
| 2406 | CONFIG_SYS_I2C_MAX_HOPS |
| 2407 | define how many muxes are maximal consecutively connected |
| 2408 | on one i2c bus. If you not use i2c muxes, omit this |
| 2409 | define. |
| 2410 | |
| 2411 | CONFIG_SYS_I2C_BUSES |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 2412 | hold a list of buses you want to use, only used if |
Heiko Schocher | e0e55bc | 2012-01-16 21:12:24 +0000 | [diff] [blame] | 2413 | CONFIG_SYS_I2C_DIRECT_BUS is not defined, for example |
| 2414 | a board with CONFIG_SYS_I2C_MAX_HOPS = 1 and |
| 2415 | CONFIG_SYS_NUM_I2C_BUSES = 9: |
| 2416 | |
| 2417 | CONFIG_SYS_I2C_BUSES {{0, {I2C_NULL_HOP}}, \ |
| 2418 | {0, {{I2C_MUX_PCA9547, 0x70, 1}}}, \ |
| 2419 | {0, {{I2C_MUX_PCA9547, 0x70, 2}}}, \ |
| 2420 | {0, {{I2C_MUX_PCA9547, 0x70, 3}}}, \ |
| 2421 | {0, {{I2C_MUX_PCA9547, 0x70, 4}}}, \ |
| 2422 | {0, {{I2C_MUX_PCA9547, 0x70, 5}}}, \ |
| 2423 | {1, {I2C_NULL_HOP}}, \ |
| 2424 | {1, {{I2C_MUX_PCA9544, 0x72, 1}}}, \ |
| 2425 | {1, {{I2C_MUX_PCA9544, 0x72, 2}}}, \ |
| 2426 | } |
| 2427 | |
| 2428 | which defines |
| 2429 | bus 0 on adapter 0 without a mux |
Heiko Schocher | 479a4cf | 2013-01-29 08:53:15 +0100 | [diff] [blame] | 2430 | bus 1 on adapter 0 with a PCA9547 on address 0x70 port 1 |
| 2431 | bus 2 on adapter 0 with a PCA9547 on address 0x70 port 2 |
| 2432 | bus 3 on adapter 0 with a PCA9547 on address 0x70 port 3 |
| 2433 | bus 4 on adapter 0 with a PCA9547 on address 0x70 port 4 |
| 2434 | bus 5 on adapter 0 with a PCA9547 on address 0x70 port 5 |
Heiko Schocher | e0e55bc | 2012-01-16 21:12:24 +0000 | [diff] [blame] | 2435 | bus 6 on adapter 1 without a mux |
Heiko Schocher | 479a4cf | 2013-01-29 08:53:15 +0100 | [diff] [blame] | 2436 | bus 7 on adapter 1 with a PCA9544 on address 0x72 port 1 |
| 2437 | bus 8 on adapter 1 with a PCA9544 on address 0x72 port 2 |
Heiko Schocher | e0e55bc | 2012-01-16 21:12:24 +0000 | [diff] [blame] | 2438 | |
| 2439 | If you do not have i2c muxes on your board, omit this define. |
| 2440 | |
Heiko Schocher | 479a4cf | 2013-01-29 08:53:15 +0100 | [diff] [blame] | 2441 | - Legacy I2C Support: CONFIG_HARD_I2C |
Heiko Schocher | e0e55bc | 2012-01-16 21:12:24 +0000 | [diff] [blame] | 2442 | |
| 2443 | NOTE: It is intended to move drivers to CONFIG_SYS_I2C which |
| 2444 | provides the following compelling advantages: |
| 2445 | |
| 2446 | - more than one i2c adapter is usable |
| 2447 | - approved multibus support |
| 2448 | - better i2c mux support |
| 2449 | |
| 2450 | ** Please consider updating your I2C driver now. ** |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2451 | |
Heiko Schocher | 479a4cf | 2013-01-29 08:53:15 +0100 | [diff] [blame] | 2452 | These enable legacy I2C serial bus commands. Defining |
| 2453 | CONFIG_HARD_I2C will include the appropriate I2C driver |
| 2454 | for the selected CPU. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2455 | |
wdenk | 21136db | 2003-07-16 21:53:01 +0000 | [diff] [blame] | 2456 | This will allow you to use i2c commands at the u-boot |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 2457 | command line (as long as you set CONFIG_CMD_I2C in |
wdenk | b9bbd24 | 2003-06-30 16:24:52 +0000 | [diff] [blame] | 2458 | CONFIG_COMMANDS) and communicate with i2c based realtime |
| 2459 | clock chips. See common/cmd_i2c.c for a description of the |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 2460 | command line interface. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2461 | |
Ben Warren | 4565715 | 2006-09-07 16:50:54 -0400 | [diff] [blame] | 2462 | CONFIG_HARD_I2C selects a hardware I2C controller. |
wdenk | b9bbd24 | 2003-06-30 16:24:52 +0000 | [diff] [blame] | 2463 | |
wdenk | 21136db | 2003-07-16 21:53:01 +0000 | [diff] [blame] | 2464 | There are several other quantities that must also be |
Heiko Schocher | 479a4cf | 2013-01-29 08:53:15 +0100 | [diff] [blame] | 2465 | defined when you define CONFIG_HARD_I2C. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2466 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 2467 | In both cases you will need to define CONFIG_SYS_I2C_SPEED |
wdenk | 21136db | 2003-07-16 21:53:01 +0000 | [diff] [blame] | 2468 | to be the frequency (in Hz) at which you wish your i2c bus |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 2469 | to run and CONFIG_SYS_I2C_SLAVE to be the address of this node (ie |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 2470 | the CPU's i2c node address). |
wdenk | 21136db | 2003-07-16 21:53:01 +0000 | [diff] [blame] | 2471 | |
Peter Tyser | e4d1abc | 2010-04-12 22:28:21 -0500 | [diff] [blame] | 2472 | Now, the u-boot i2c code for the mpc8xx |
Stefan Roese | 88fbf93 | 2010-04-15 16:07:28 +0200 | [diff] [blame] | 2473 | (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node |
Peter Tyser | e4d1abc | 2010-04-12 22:28:21 -0500 | [diff] [blame] | 2474 | and so its address should therefore be cleared to 0 (See, |
| 2475 | eg, MPC823e User's Manual p.16-473). So, set |
| 2476 | CONFIG_SYS_I2C_SLAVE to 0. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2477 | |
Eric Millbrandt | 12990a4 | 2009-09-03 08:09:44 -0500 | [diff] [blame] | 2478 | CONFIG_SYS_I2C_INIT_MPC5XXX |
| 2479 | |
| 2480 | When a board is reset during an i2c bus transfer |
| 2481 | chips might think that the current transfer is still |
| 2482 | in progress. Reset the slave devices by sending start |
| 2483 | commands until the slave device responds. |
| 2484 | |
wdenk | 21136db | 2003-07-16 21:53:01 +0000 | [diff] [blame] | 2485 | That's all that's required for CONFIG_HARD_I2C. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2486 | |
Heiko Schocher | 479a4cf | 2013-01-29 08:53:15 +0100 | [diff] [blame] | 2487 | If you use the software i2c interface (CONFIG_SYS_I2C_SOFT) |
wdenk | b9bbd24 | 2003-06-30 16:24:52 +0000 | [diff] [blame] | 2488 | then the following macros need to be defined (examples are |
| 2489 | from include/configs/lwmon.h): |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2490 | |
| 2491 | I2C_INIT |
| 2492 | |
wdenk | b9bbd24 | 2003-06-30 16:24:52 +0000 | [diff] [blame] | 2493 | (Optional). Any commands necessary to enable the I2C |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 2494 | controller or configure ports. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2495 | |
wdenk | 544e973 | 2004-02-06 23:19:44 +0000 | [diff] [blame] | 2496 | eg: #define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL) |
wdenk | b9bbd24 | 2003-06-30 16:24:52 +0000 | [diff] [blame] | 2497 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2498 | I2C_PORT |
| 2499 | |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 2500 | (Only for MPC8260 CPU). The I/O port to use (the code |
| 2501 | assumes both bits are on the same port). Valid values |
| 2502 | are 0..3 for ports A..D. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2503 | |
| 2504 | I2C_ACTIVE |
| 2505 | |
| 2506 | The code necessary to make the I2C data line active |
| 2507 | (driven). If the data line is open collector, this |
| 2508 | define can be null. |
| 2509 | |
wdenk | b9bbd24 | 2003-06-30 16:24:52 +0000 | [diff] [blame] | 2510 | eg: #define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA) |
| 2511 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2512 | I2C_TRISTATE |
| 2513 | |
| 2514 | The code necessary to make the I2C data line tri-stated |
| 2515 | (inactive). If the data line is open collector, this |
| 2516 | define can be null. |
| 2517 | |
wdenk | b9bbd24 | 2003-06-30 16:24:52 +0000 | [diff] [blame] | 2518 | eg: #define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA) |
| 2519 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2520 | I2C_READ |
| 2521 | |
York Sun | 4a59809 | 2013-04-01 11:29:11 -0700 | [diff] [blame] | 2522 | Code that returns true if the I2C data line is high, |
| 2523 | false if it is low. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2524 | |
wdenk | b9bbd24 | 2003-06-30 16:24:52 +0000 | [diff] [blame] | 2525 | eg: #define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0) |
| 2526 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2527 | I2C_SDA(bit) |
| 2528 | |
York Sun | 4a59809 | 2013-04-01 11:29:11 -0700 | [diff] [blame] | 2529 | If <bit> is true, sets the I2C data line high. If it |
| 2530 | is false, it clears it (low). |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2531 | |
wdenk | b9bbd24 | 2003-06-30 16:24:52 +0000 | [diff] [blame] | 2532 | eg: #define I2C_SDA(bit) \ |
wdenk | 2bb1105 | 2003-07-17 23:16:40 +0000 | [diff] [blame] | 2533 | if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \ |
wdenk | 544e973 | 2004-02-06 23:19:44 +0000 | [diff] [blame] | 2534 | else immr->im_cpm.cp_pbdat &= ~PB_SDA |
wdenk | b9bbd24 | 2003-06-30 16:24:52 +0000 | [diff] [blame] | 2535 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2536 | I2C_SCL(bit) |
| 2537 | |
York Sun | 4a59809 | 2013-04-01 11:29:11 -0700 | [diff] [blame] | 2538 | If <bit> is true, sets the I2C clock line high. If it |
| 2539 | is false, it clears it (low). |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2540 | |
wdenk | b9bbd24 | 2003-06-30 16:24:52 +0000 | [diff] [blame] | 2541 | eg: #define I2C_SCL(bit) \ |
wdenk | 2bb1105 | 2003-07-17 23:16:40 +0000 | [diff] [blame] | 2542 | if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \ |
wdenk | 544e973 | 2004-02-06 23:19:44 +0000 | [diff] [blame] | 2543 | else immr->im_cpm.cp_pbdat &= ~PB_SCL |
wdenk | b9bbd24 | 2003-06-30 16:24:52 +0000 | [diff] [blame] | 2544 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2545 | I2C_DELAY |
| 2546 | |
| 2547 | This delay is invoked four times per clock cycle so this |
| 2548 | controls the rate of data transfer. The data rate thus |
wdenk | b9bbd24 | 2003-06-30 16:24:52 +0000 | [diff] [blame] | 2549 | is 1 / (I2C_DELAY * 4). Often defined to be something |
wdenk | 21136db | 2003-07-16 21:53:01 +0000 | [diff] [blame] | 2550 | like: |
| 2551 | |
wdenk | b9bbd24 | 2003-06-30 16:24:52 +0000 | [diff] [blame] | 2552 | #define I2C_DELAY udelay(2) |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2553 | |
Mike Frysinger | ee12d54 | 2010-07-21 13:38:02 -0400 | [diff] [blame] | 2554 | CONFIG_SOFT_I2C_GPIO_SCL / CONFIG_SOFT_I2C_GPIO_SDA |
| 2555 | |
| 2556 | If your arch supports the generic GPIO framework (asm/gpio.h), |
| 2557 | then you may alternatively define the two GPIOs that are to be |
| 2558 | used as SCL / SDA. Any of the previous I2C_xxx macros will |
| 2559 | have GPIO-based defaults assigned to them as appropriate. |
| 2560 | |
| 2561 | You should define these to the GPIO value as given directly to |
| 2562 | the generic GPIO functions. |
| 2563 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 2564 | CONFIG_SYS_I2C_INIT_BOARD |
wdenk | cc1e256 | 2003-03-06 13:39:27 +0000 | [diff] [blame] | 2565 | |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 2566 | When a board is reset during an i2c bus transfer |
| 2567 | chips might think that the current transfer is still |
| 2568 | in progress. On some boards it is possible to access |
| 2569 | the i2c SCLK line directly, either by using the |
| 2570 | processor pin as a GPIO or by having a second pin |
| 2571 | connected to the bus. If this option is defined a |
| 2572 | custom i2c_init_board() routine in boards/xxx/board.c |
| 2573 | is run early in the boot sequence. |
wdenk | cc1e256 | 2003-03-06 13:39:27 +0000 | [diff] [blame] | 2574 | |
Richard Retanubun | df0149c | 2010-04-12 15:08:17 -0400 | [diff] [blame] | 2575 | CONFIG_SYS_I2C_BOARD_LATE_INIT |
| 2576 | |
| 2577 | An alternative to CONFIG_SYS_I2C_INIT_BOARD. If this option is |
| 2578 | defined a custom i2c_board_late_init() routine in |
| 2579 | boards/xxx/board.c is run AFTER the operations in i2c_init() |
| 2580 | is completed. This callpoint can be used to unreset i2c bus |
| 2581 | using CPU i2c controller register accesses for CPUs whose i2c |
| 2582 | controller provide such a method. It is called at the end of |
| 2583 | i2c_init() to allow i2c_init operations to setup the i2c bus |
| 2584 | controller on the CPU (e.g. setting bus speed & slave address). |
| 2585 | |
wdenk | 0e2bd9c | 2004-06-06 21:51:03 +0000 | [diff] [blame] | 2586 | CONFIG_I2CFAST (PPC405GP|PPC405EP only) |
| 2587 | |
| 2588 | This option enables configuration of bi_iic_fast[] flags |
| 2589 | in u-boot bd_info structure based on u-boot environment |
| 2590 | variable "i2cfast". (see also i2cfast) |
| 2591 | |
Ben Warren | 4565715 | 2006-09-07 16:50:54 -0400 | [diff] [blame] | 2592 | CONFIG_I2C_MULTI_BUS |
| 2593 | |
| 2594 | This option allows the use of multiple I2C buses, each of which |
Wolfgang Denk | 092ae95 | 2011-10-26 10:21:21 +0000 | [diff] [blame] | 2595 | must have a controller. At any point in time, only one bus is |
| 2596 | active. To switch to a different bus, use the 'i2c dev' command. |
Ben Warren | 4565715 | 2006-09-07 16:50:54 -0400 | [diff] [blame] | 2597 | Note that bus numbering is zero-based. |
| 2598 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 2599 | CONFIG_SYS_I2C_NOPROBES |
Ben Warren | 4565715 | 2006-09-07 16:50:54 -0400 | [diff] [blame] | 2600 | |
| 2601 | This option specifies a list of I2C devices that will be skipped |
Wolfgang Denk | 092ae95 | 2011-10-26 10:21:21 +0000 | [diff] [blame] | 2602 | when the 'i2c probe' command is issued. If CONFIG_I2C_MULTI_BUS |
Peter Tyser | 469cde4 | 2009-04-18 22:34:03 -0500 | [diff] [blame] | 2603 | is set, specify a list of bus-device pairs. Otherwise, specify |
| 2604 | a 1D array of device addresses |
Ben Warren | 4565715 | 2006-09-07 16:50:54 -0400 | [diff] [blame] | 2605 | |
| 2606 | e.g. |
| 2607 | #undef CONFIG_I2C_MULTI_BUS |
Wolfgang Denk | 092ae95 | 2011-10-26 10:21:21 +0000 | [diff] [blame] | 2608 | #define CONFIG_SYS_I2C_NOPROBES {0x50,0x68} |
Ben Warren | 4565715 | 2006-09-07 16:50:54 -0400 | [diff] [blame] | 2609 | |
| 2610 | will skip addresses 0x50 and 0x68 on a board with one I2C bus |
| 2611 | |
Wolfgang Denk | 092ae95 | 2011-10-26 10:21:21 +0000 | [diff] [blame] | 2612 | #define CONFIG_I2C_MULTI_BUS |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 2613 | #define CONFIG_SYS_I2C_MULTI_NOPROBES {{0,0x50},{0,0x68},{1,0x54}} |
Ben Warren | 4565715 | 2006-09-07 16:50:54 -0400 | [diff] [blame] | 2614 | |
| 2615 | will skip addresses 0x50 and 0x68 on bus 0 and address 0x54 on bus 1 |
| 2616 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 2617 | CONFIG_SYS_SPD_BUS_NUM |
Timur Tabi | ab34754 | 2006-11-03 19:15:00 -0600 | [diff] [blame] | 2618 | |
| 2619 | If defined, then this indicates the I2C bus number for DDR SPD. |
| 2620 | If not defined, then U-Boot assumes that SPD is on I2C bus 0. |
| 2621 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 2622 | CONFIG_SYS_RTC_BUS_NUM |
Stefan Roese | 096cc9b | 2007-02-20 10:51:26 +0100 | [diff] [blame] | 2623 | |
| 2624 | If defined, then this indicates the I2C bus number for the RTC. |
| 2625 | If not defined, then U-Boot assumes that RTC is on I2C bus 0. |
| 2626 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 2627 | CONFIG_SYS_DTT_BUS_NUM |
Stefan Roese | 096cc9b | 2007-02-20 10:51:26 +0100 | [diff] [blame] | 2628 | |
| 2629 | If defined, then this indicates the I2C bus number for the DTT. |
| 2630 | If not defined, then U-Boot assumes that DTT is on I2C bus 0. |
| 2631 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 2632 | CONFIG_SYS_I2C_DTT_ADDR: |
Victor Gallardo | 31856dd | 2008-09-09 15:13:29 -0700 | [diff] [blame] | 2633 | |
| 2634 | If defined, specifies the I2C address of the DTT device. |
| 2635 | If not defined, then U-Boot uses predefined value for |
| 2636 | specified DTT device. |
| 2637 | |
Andrew Dyer | 58c41f9 | 2008-12-29 17:36:01 -0600 | [diff] [blame] | 2638 | CONFIG_SOFT_I2C_READ_REPEATED_START |
| 2639 | |
| 2640 | defining this will force the i2c_read() function in |
| 2641 | the soft_i2c driver to perform an I2C repeated start |
| 2642 | between writing the address pointer and reading the |
| 2643 | data. If this define is omitted the default behaviour |
| 2644 | of doing a stop-start sequence will be used. Most I2C |
| 2645 | devices can use either method, but some require one or |
| 2646 | the other. |
Timur Tabi | ab34754 | 2006-11-03 19:15:00 -0600 | [diff] [blame] | 2647 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2648 | - SPI Support: CONFIG_SPI |
| 2649 | |
| 2650 | Enables SPI driver (so far only tested with |
| 2651 | SPI EEPROM, also an instance works with Crystal A/D and |
| 2652 | D/As on the SACSng board) |
| 2653 | |
Yoshihiro Shimoda | 65bd9b4 | 2011-01-31 16:50:43 +0900 | [diff] [blame] | 2654 | CONFIG_SH_SPI |
| 2655 | |
| 2656 | Enables the driver for SPI controller on SuperH. Currently |
| 2657 | only SH7757 is supported. |
| 2658 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2659 | CONFIG_SOFT_SPI |
| 2660 | |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 2661 | Enables a software (bit-bang) SPI driver rather than |
| 2662 | using hardware support. This is a general purpose |
| 2663 | driver that only requires three general I/O port pins |
| 2664 | (two outputs, one input) to function. If this is |
| 2665 | defined, the board configuration must define several |
| 2666 | SPI configuration items (port pins to use, etc). For |
| 2667 | an example, see include/configs/sacsng.h. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2668 | |
Ben Warren | 7efe927 | 2008-01-16 22:37:35 -0500 | [diff] [blame] | 2669 | CONFIG_HARD_SPI |
| 2670 | |
| 2671 | Enables a hardware SPI driver for general-purpose reads |
| 2672 | and writes. As with CONFIG_SOFT_SPI, the board configuration |
| 2673 | must define a list of chip-select function pointers. |
Wolfgang Denk | 092ae95 | 2011-10-26 10:21:21 +0000 | [diff] [blame] | 2674 | Currently supported on some MPC8xxx processors. For an |
Ben Warren | 7efe927 | 2008-01-16 22:37:35 -0500 | [diff] [blame] | 2675 | example, see include/configs/mpc8349emds.h. |
| 2676 | |
Guennadi Liakhovetski | 07327a5 | 2008-04-15 14:14:25 +0200 | [diff] [blame] | 2677 | CONFIG_MXC_SPI |
| 2678 | |
| 2679 | Enables the driver for the SPI controllers on i.MX and MXC |
Fabio Estevam | dcd342c | 2011-10-28 08:57:46 +0000 | [diff] [blame] | 2680 | SoCs. Currently i.MX31/35/51 are supported. |
Guennadi Liakhovetski | 07327a5 | 2008-04-15 14:14:25 +0200 | [diff] [blame] | 2681 | |
Heiko Schocher | b77c888 | 2014-07-14 10:22:11 +0200 | [diff] [blame] | 2682 | CONFIG_SYS_SPI_MXC_WAIT |
| 2683 | Timeout for waiting until spi transfer completed. |
| 2684 | default: (CONFIG_SYS_HZ/100) /* 10 ms */ |
| 2685 | |
Matthias Fuchs | a440087 | 2007-12-27 17:12:34 +0100 | [diff] [blame] | 2686 | - FPGA Support: CONFIG_FPGA |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2687 | |
Matthias Fuchs | a440087 | 2007-12-27 17:12:34 +0100 | [diff] [blame] | 2688 | Enables FPGA subsystem. |
| 2689 | |
| 2690 | CONFIG_FPGA_<vendor> |
| 2691 | |
| 2692 | Enables support for specific chip vendors. |
| 2693 | (ALTERA, XILINX) |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2694 | |
Matthias Fuchs | a440087 | 2007-12-27 17:12:34 +0100 | [diff] [blame] | 2695 | CONFIG_FPGA_<family> |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2696 | |
Matthias Fuchs | a440087 | 2007-12-27 17:12:34 +0100 | [diff] [blame] | 2697 | Enables support for FPGA family. |
| 2698 | (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX) |
| 2699 | |
| 2700 | CONFIG_FPGA_COUNT |
| 2701 | |
| 2702 | Specify the number of FPGA devices to support. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2703 | |
Siva Durga Prasad Paladugu | adc11de | 2014-03-14 16:35:38 +0530 | [diff] [blame] | 2704 | CONFIG_CMD_FPGA_LOADMK |
| 2705 | |
| 2706 | Enable support for fpga loadmk command |
| 2707 | |
Michal Simek | 64c7098 | 2014-05-02 13:43:39 +0200 | [diff] [blame] | 2708 | CONFIG_CMD_FPGA_LOADP |
| 2709 | |
| 2710 | Enable support for fpga loadp command - load partial bitstream |
| 2711 | |
| 2712 | CONFIG_CMD_FPGA_LOADBP |
| 2713 | |
| 2714 | Enable support for fpga loadbp command - load partial bitstream |
| 2715 | (Xilinx only) |
| 2716 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 2717 | CONFIG_SYS_FPGA_PROG_FEEDBACK |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2718 | |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 2719 | Enable printing of hash marks during FPGA configuration. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2720 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 2721 | CONFIG_SYS_FPGA_CHECK_BUSY |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2722 | |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 2723 | Enable checks on FPGA configuration interface busy |
| 2724 | status by the configuration function. This option |
| 2725 | will require a board or device specific function to |
| 2726 | be written. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2727 | |
| 2728 | CONFIG_FPGA_DELAY |
| 2729 | |
| 2730 | If defined, a function that provides delays in the FPGA |
| 2731 | configuration driver. |
| 2732 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 2733 | CONFIG_SYS_FPGA_CHECK_CTRLC |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2734 | Allow Control-C to interrupt FPGA configuration |
| 2735 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 2736 | CONFIG_SYS_FPGA_CHECK_ERROR |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2737 | |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 2738 | Check for configuration errors during FPGA bitfile |
| 2739 | loading. For example, abort during Virtex II |
| 2740 | configuration if the INIT_B line goes low (which |
| 2741 | indicated a CRC error). |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2742 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 2743 | CONFIG_SYS_FPGA_WAIT_INIT |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2744 | |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 2745 | Maximum time to wait for the INIT_B line to de-assert |
| 2746 | after PROB_B has been de-asserted during a Virtex II |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 2747 | FPGA configuration sequence. The default time is 500 |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 2748 | ms. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2749 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 2750 | CONFIG_SYS_FPGA_WAIT_BUSY |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2751 | |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 2752 | Maximum time to wait for BUSY to de-assert during |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 2753 | Virtex II FPGA configuration. The default is 5 ms. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2754 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 2755 | CONFIG_SYS_FPGA_WAIT_CONFIG |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2756 | |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 2757 | Time to wait after FPGA configuration. The default is |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 2758 | 200 ms. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2759 | |
| 2760 | - Configuration Management: |
Stefan Roese | 141ed20 | 2014-10-22 12:13:24 +0200 | [diff] [blame] | 2761 | CONFIG_BUILD_TARGET |
| 2762 | |
| 2763 | Some SoCs need special image types (e.g. U-Boot binary |
| 2764 | with a special header) as build targets. By defining |
| 2765 | CONFIG_BUILD_TARGET in the SoC / board header, this |
| 2766 | special image will be automatically built upon calling |
Simon Glass | dc27def | 2016-07-27 20:33:08 -0600 | [diff] [blame] | 2767 | make / buildman. |
Stefan Roese | 141ed20 | 2014-10-22 12:13:24 +0200 | [diff] [blame] | 2768 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2769 | CONFIG_IDENT_STRING |
| 2770 | |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 2771 | If defined, this string will be added to the U-Boot |
| 2772 | version information (U_BOOT_VERSION) |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2773 | |
| 2774 | - Vendor Parameter Protection: |
| 2775 | |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 2776 | U-Boot considers the values of the environment |
| 2777 | variables "serial#" (Board Serial Number) and |
wdenk | eb20ad3 | 2003-09-05 23:19:14 +0000 | [diff] [blame] | 2778 | "ethaddr" (Ethernet Address) to be parameters that |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 2779 | are set once by the board vendor / manufacturer, and |
| 2780 | protects these variables from casual modification by |
| 2781 | the user. Once set, these variables are read-only, |
| 2782 | and write or delete attempts are rejected. You can |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 2783 | change this behaviour: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2784 | |
| 2785 | If CONFIG_ENV_OVERWRITE is #defined in your config |
| 2786 | file, the write protection for vendor parameters is |
wdenk | cc1e256 | 2003-03-06 13:39:27 +0000 | [diff] [blame] | 2787 | completely disabled. Anybody can change or delete |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2788 | these parameters. |
| 2789 | |
Joe Hershberger | 76f353e | 2015-05-04 14:55:14 -0500 | [diff] [blame] | 2790 | Alternatively, if you define _both_ an ethaddr in the |
| 2791 | default env _and_ CONFIG_OVERWRITE_ETHADDR_ONCE, a default |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 2792 | Ethernet address is installed in the environment, |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2793 | which can be changed exactly ONCE by the user. [The |
| 2794 | serial# is unaffected by this, i. e. it remains |
| 2795 | read-only.] |
| 2796 | |
Joe Hershberger | 71497d0 | 2012-12-11 22:16:31 -0600 | [diff] [blame] | 2797 | The same can be accomplished in a more flexible way |
| 2798 | for any variable by configuring the type of access |
| 2799 | to allow for those variables in the ".flags" variable |
| 2800 | or define CONFIG_ENV_FLAGS_LIST_STATIC. |
| 2801 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2802 | - Protected RAM: |
| 2803 | CONFIG_PRAM |
| 2804 | |
| 2805 | Define this variable to enable the reservation of |
| 2806 | "protected RAM", i. e. RAM which is not overwritten |
| 2807 | by U-Boot. Define CONFIG_PRAM to hold the number of |
| 2808 | kB you want to reserve for pRAM. You can overwrite |
| 2809 | this default value by defining an environment |
| 2810 | variable "pram" to the number of kB you want to |
| 2811 | reserve. Note that the board info structure will |
| 2812 | still show the full amount of RAM. If pRAM is |
| 2813 | reserved, a new environment variable "mem" will |
| 2814 | automatically be defined to hold the amount of |
| 2815 | remaining RAM in a form that can be passed as boot |
| 2816 | argument to Linux, for instance like that: |
| 2817 | |
Wolfgang Denk | 86eb3b7 | 2005-11-20 21:40:11 +0100 | [diff] [blame] | 2818 | setenv bootargs ... mem=\${mem} |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2819 | saveenv |
| 2820 | |
| 2821 | This way you can tell Linux not to use this memory, |
| 2822 | either, which results in a memory region that will |
| 2823 | not be affected by reboots. |
| 2824 | |
| 2825 | *WARNING* If your board configuration uses automatic |
| 2826 | detection of the RAM size, you must make sure that |
| 2827 | this memory test is non-destructive. So far, the |
| 2828 | following board configurations are known to be |
| 2829 | "pRAM-clean": |
| 2830 | |
Wolfgang Denk | 9032676 | 2012-10-24 02:36:15 +0000 | [diff] [blame] | 2831 | IVMS8, IVML24, SPD8xx, TQM8xxL, |
| 2832 | HERMES, IP860, RPXlite, LWMON, |
Wolfgang Denk | cd4e42e | 2010-10-05 22:54:53 +0200 | [diff] [blame] | 2833 | FLAGADM, TQM8260 |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2834 | |
Gabe Black | a2f3a93 | 2012-12-02 04:55:18 +0000 | [diff] [blame] | 2835 | - Access to physical memory region (> 4GB) |
| 2836 | Some basic support is provided for operations on memory not |
| 2837 | normally accessible to U-Boot - e.g. some architectures |
| 2838 | support access to more than 4GB of memory on 32-bit |
| 2839 | machines using physical address extension or similar. |
| 2840 | Define CONFIG_PHYSMEM to access this basic support, which |
| 2841 | currently only supports clearing the memory. |
| 2842 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2843 | - Error Recovery: |
| 2844 | CONFIG_PANIC_HANG |
| 2845 | |
| 2846 | Define this variable to stop the system in case of a |
| 2847 | fatal error, so that you have to reset it manually. |
| 2848 | This is probably NOT a good idea for an embedded |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 2849 | system where you want the system to reboot |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2850 | automatically as fast as possible, but it may be |
| 2851 | useful during development since you can try to debug |
| 2852 | the conditions that lead to the situation. |
| 2853 | |
| 2854 | CONFIG_NET_RETRY_COUNT |
| 2855 | |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 2856 | This variable defines the number of retries for |
| 2857 | network operations like ARP, RARP, TFTP, or BOOTP |
| 2858 | before giving up the operation. If not defined, a |
| 2859 | default value of 5 is used. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2860 | |
Guennadi Liakhovetski | b38c2b3 | 2008-04-03 17:04:19 +0200 | [diff] [blame] | 2861 | CONFIG_ARP_TIMEOUT |
| 2862 | |
| 2863 | Timeout waiting for an ARP reply in milliseconds. |
| 2864 | |
Tetsuyuki Kobayashi | 147e390 | 2012-07-03 22:25:21 +0000 | [diff] [blame] | 2865 | CONFIG_NFS_TIMEOUT |
| 2866 | |
| 2867 | Timeout in milliseconds used in NFS protocol. |
| 2868 | If you encounter "ERROR: Cannot umount" in nfs command, |
| 2869 | try longer timeout such as |
| 2870 | #define CONFIG_NFS_TIMEOUT 10000UL |
| 2871 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2872 | - Command Interpreter: |
Wolfgang Denk | 81352ed | 2006-10-28 02:28:02 +0200 | [diff] [blame] | 2873 | CONFIG_AUTO_COMPLETE |
wdenk | 3902d70 | 2004-04-15 18:22:41 +0000 | [diff] [blame] | 2874 | |
| 2875 | Enable auto completion of commands using TAB. |
| 2876 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 2877 | CONFIG_SYS_PROMPT_HUSH_PS2 |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2878 | |
| 2879 | This defines the secondary prompt string, which is |
| 2880 | printed when the command interpreter needs more input |
| 2881 | to complete a command. Usually "> ". |
| 2882 | |
| 2883 | Note: |
| 2884 | |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 2885 | In the current implementation, the local variables |
| 2886 | space and global environment variables space are |
| 2887 | separated. Local variables are those you define by |
| 2888 | simply typing `name=value'. To access a local |
| 2889 | variable later on, you have write `$name' or |
| 2890 | `${name}'; to execute the contents of a variable |
| 2891 | directly type `$name' at the command prompt. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2892 | |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 2893 | Global environment variables are those you use |
| 2894 | setenv/printenv to work with. To run a command stored |
| 2895 | in such a variable, you need to use the run command, |
| 2896 | and you must not use the '$' sign to access them. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2897 | |
| 2898 | To store commands and special characters in a |
| 2899 | variable, please use double quotation marks |
| 2900 | surrounding the whole text of the variable, instead |
| 2901 | of the backslashes before semicolons and special |
| 2902 | symbols. |
| 2903 | |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 2904 | - Command Line Editing and History: |
Wolfgang Denk | 2039a07 | 2006-07-21 11:35:21 +0200 | [diff] [blame] | 2905 | CONFIG_CMDLINE_EDITING |
| 2906 | |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 2907 | Enable editing and History functions for interactive |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 2908 | command line input operations |
Wolfgang Denk | 2039a07 | 2006-07-21 11:35:21 +0200 | [diff] [blame] | 2909 | |
Marek Vasut | 734fb04 | 2016-01-27 04:47:55 +0100 | [diff] [blame] | 2910 | - Command Line PS1/PS2 support: |
| 2911 | CONFIG_CMDLINE_PS_SUPPORT |
| 2912 | |
| 2913 | Enable support for changing the command prompt string |
| 2914 | at run-time. Only static string is supported so far. |
| 2915 | The string is obtained from environment variables PS1 |
| 2916 | and PS2. |
| 2917 | |
wdenk | c0aa5c5 | 2003-12-06 19:49:23 +0000 | [diff] [blame] | 2918 | - Default Environment: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2919 | CONFIG_EXTRA_ENV_SETTINGS |
| 2920 | |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 2921 | Define this to contain any number of null terminated |
| 2922 | strings (variable = value pairs) that will be part of |
wdenk | eb20ad3 | 2003-09-05 23:19:14 +0000 | [diff] [blame] | 2923 | the default environment compiled into the boot image. |
wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 2924 | |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 2925 | For example, place something like this in your |
| 2926 | board's config file: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2927 | |
| 2928 | #define CONFIG_EXTRA_ENV_SETTINGS \ |
| 2929 | "myvar1=value1\0" \ |
| 2930 | "myvar2=value2\0" |
| 2931 | |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 2932 | Warning: This method is based on knowledge about the |
| 2933 | internal format how the environment is stored by the |
| 2934 | U-Boot code. This is NOT an official, exported |
| 2935 | interface! Although it is unlikely that this format |
wdenk | eb20ad3 | 2003-09-05 23:19:14 +0000 | [diff] [blame] | 2936 | will change soon, there is no guarantee either. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2937 | You better know what you are doing here. |
| 2938 | |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 2939 | Note: overly (ab)use of the default environment is |
| 2940 | discouraged. Make sure to check other ways to preset |
Wolfgang Denk | 85c25df | 2009-04-01 23:34:12 +0200 | [diff] [blame] | 2941 | the environment like the "source" command or the |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 2942 | boot command first. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 2943 | |
Stephen Warren | 1465d5f | 2012-05-22 09:21:54 +0000 | [diff] [blame] | 2944 | CONFIG_ENV_VARS_UBOOT_CONFIG |
| 2945 | |
| 2946 | Define this in order to add variables describing the |
| 2947 | U-Boot build configuration to the default environment. |
| 2948 | These will be named arch, cpu, board, vendor, and soc. |
| 2949 | |
| 2950 | Enabling this option will cause the following to be defined: |
| 2951 | |
| 2952 | - CONFIG_SYS_ARCH |
| 2953 | - CONFIG_SYS_CPU |
| 2954 | - CONFIG_SYS_BOARD |
| 2955 | - CONFIG_SYS_VENDOR |
| 2956 | - CONFIG_SYS_SOC |
| 2957 | |
Tom Rini | 4c8cc9b | 2012-10-24 07:28:16 +0000 | [diff] [blame] | 2958 | CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG |
| 2959 | |
| 2960 | Define this in order to add variables describing certain |
| 2961 | run-time determined information about the hardware to the |
| 2962 | environment. These will be named board_name, board_rev. |
| 2963 | |
Simon Glass | 6b8d5fd | 2012-11-30 13:01:17 +0000 | [diff] [blame] | 2964 | CONFIG_DELAY_ENVIRONMENT |
| 2965 | |
| 2966 | Normally the environment is loaded when the board is |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 2967 | initialised so that it is available to U-Boot. This inhibits |
Simon Glass | 6b8d5fd | 2012-11-30 13:01:17 +0000 | [diff] [blame] | 2968 | that so that the environment is not available until |
| 2969 | explicitly loaded later by U-Boot code. With CONFIG_OF_CONTROL |
| 2970 | this is instead controlled by the value of |
| 2971 | /config/load-environment. |
| 2972 | |
Chris Packham | 2216ddb | 2015-06-19 20:25:59 +1200 | [diff] [blame] | 2973 | - Parallel Flash support: |
| 2974 | CONFIG_SYS_NO_FLASH |
| 2975 | |
Bin Meng | 7557405 | 2016-02-05 19:30:11 -0800 | [diff] [blame] | 2976 | Traditionally U-Boot was run on systems with parallel NOR |
Chris Packham | 2216ddb | 2015-06-19 20:25:59 +1200 | [diff] [blame] | 2977 | flash. This option is used to disable support for parallel NOR |
| 2978 | flash. This option should be defined if the board does not have |
| 2979 | parallel flash. |
| 2980 | |
| 2981 | If this option is not defined one of the generic flash drivers |
| 2982 | (e.g. CONFIG_FLASH_CFI_DRIVER or CONFIG_ST_SMI) must be |
| 2983 | selected or the board must provide an implementation of the |
| 2984 | flash API (see include/flash.h). |
| 2985 | |
wdenk | c0aa5c5 | 2003-12-06 19:49:23 +0000 | [diff] [blame] | 2986 | - DataFlash Support: |
wdenk | 381669a | 2003-06-16 23:50:08 +0000 | [diff] [blame] | 2987 | CONFIG_HAS_DATAFLASH |
| 2988 | |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 2989 | Defining this option enables DataFlash features and |
| 2990 | allows to read/write in Dataflash via the standard |
| 2991 | commands cp, md... |
wdenk | 381669a | 2003-06-16 23:50:08 +0000 | [diff] [blame] | 2992 | |
Eric Nelson | 97f5f8f | 2012-01-31 10:52:08 -0700 | [diff] [blame] | 2993 | - Serial Flash support |
| 2994 | CONFIG_CMD_SF |
| 2995 | |
| 2996 | Defining this option enables SPI flash commands |
| 2997 | 'sf probe/read/write/erase/update'. |
| 2998 | |
| 2999 | Usage requires an initial 'probe' to define the serial |
| 3000 | flash parameters, followed by read/write/erase/update |
| 3001 | commands. |
| 3002 | |
| 3003 | The following defaults may be provided by the platform |
| 3004 | to handle the common case when only a single serial |
| 3005 | flash is present on the system. |
| 3006 | |
| 3007 | CONFIG_SF_DEFAULT_BUS Bus identifier |
| 3008 | CONFIG_SF_DEFAULT_CS Chip-select |
| 3009 | CONFIG_SF_DEFAULT_MODE (see include/spi.h) |
| 3010 | CONFIG_SF_DEFAULT_SPEED in Hz |
| 3011 | |
Simon Glass | 4b5545e | 2012-10-08 13:16:02 +0000 | [diff] [blame] | 3012 | CONFIG_CMD_SF_TEST |
| 3013 | |
| 3014 | Define this option to include a destructive SPI flash |
| 3015 | test ('sf test'). |
| 3016 | |
Jagannadha Sutradharudu Teki | d7f253b | 2014-01-11 15:25:04 +0530 | [diff] [blame] | 3017 | CONFIG_SF_DUAL_FLASH Dual flash memories |
| 3018 | |
| 3019 | Define this option to use dual flash support where two flash |
| 3020 | memories can be connected with a given cs line. |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 3021 | Currently Xilinx Zynq qspi supports these type of connections. |
Jagannadha Sutradharudu Teki | d7f253b | 2014-01-11 15:25:04 +0530 | [diff] [blame] | 3022 | |
wdenk | ef89394 | 2004-02-23 16:11:30 +0000 | [diff] [blame] | 3023 | - SystemACE Support: |
| 3024 | CONFIG_SYSTEMACE |
| 3025 | |
| 3026 | Adding this option adds support for Xilinx SystemACE |
| 3027 | chips attached via some sort of local bus. The address |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 3028 | of the chip must also be defined in the |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3029 | CONFIG_SYS_SYSTEMACE_BASE macro. For example: |
wdenk | ef89394 | 2004-02-23 16:11:30 +0000 | [diff] [blame] | 3030 | |
| 3031 | #define CONFIG_SYSTEMACE |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3032 | #define CONFIG_SYS_SYSTEMACE_BASE 0xf0000000 |
wdenk | ef89394 | 2004-02-23 16:11:30 +0000 | [diff] [blame] | 3033 | |
| 3034 | When SystemACE support is added, the "ace" device type |
| 3035 | becomes available to the fat commands, i.e. fatls. |
| 3036 | |
Wolfgang Denk | e3cfce5 | 2005-09-24 22:37:32 +0200 | [diff] [blame] | 3037 | - TFTP Fixed UDP Port: |
| 3038 | CONFIG_TFTP_PORT |
| 3039 | |
Wolfgang Denk | 227b519 | 2005-09-24 23:25:46 +0200 | [diff] [blame] | 3040 | If this is defined, the environment variable tftpsrcp |
Wolfgang Denk | e3cfce5 | 2005-09-24 22:37:32 +0200 | [diff] [blame] | 3041 | is used to supply the TFTP UDP source port value. |
Wolfgang Denk | 227b519 | 2005-09-24 23:25:46 +0200 | [diff] [blame] | 3042 | If tftpsrcp isn't defined, the normal pseudo-random port |
Wolfgang Denk | e3cfce5 | 2005-09-24 22:37:32 +0200 | [diff] [blame] | 3043 | number generator is used. |
| 3044 | |
Wolfgang Denk | 227b519 | 2005-09-24 23:25:46 +0200 | [diff] [blame] | 3045 | Also, the environment variable tftpdstp is used to supply |
| 3046 | the TFTP UDP destination port value. If tftpdstp isn't |
| 3047 | defined, the normal port 69 is used. |
| 3048 | |
| 3049 | The purpose for tftpsrcp is to allow a TFTP server to |
Wolfgang Denk | e3cfce5 | 2005-09-24 22:37:32 +0200 | [diff] [blame] | 3050 | blindly start the TFTP transfer using the pre-configured |
| 3051 | target IP address and UDP port. This has the effect of |
| 3052 | "punching through" the (Windows XP) firewall, allowing |
| 3053 | the remainder of the TFTP transfer to proceed normally. |
| 3054 | A better solution is to properly configure the firewall, |
| 3055 | but sometimes that is not allowed. |
| 3056 | |
Simon Glass | 058bb8d | 2012-12-05 14:46:38 +0000 | [diff] [blame] | 3057 | - Hashing support: |
| 3058 | CONFIG_CMD_HASH |
| 3059 | |
| 3060 | This enables a generic 'hash' command which can produce |
| 3061 | hashes / digests from a few algorithms (e.g. SHA1, SHA256). |
| 3062 | |
| 3063 | CONFIG_HASH_VERIFY |
| 3064 | |
| 3065 | Enable the hash verify command (hash -v). This adds to code |
| 3066 | size a little. |
| 3067 | |
gaurav rana | ef20159 | 2015-02-20 12:51:46 +0530 | [diff] [blame] | 3068 | CONFIG_SHA1 - This option enables support of hashing using SHA1 |
| 3069 | algorithm. The hash is calculated in software. |
| 3070 | CONFIG_SHA256 - This option enables support of hashing using |
| 3071 | SHA256 algorithm. The hash is calculated in software. |
| 3072 | CONFIG_SHA_HW_ACCEL - This option enables hardware acceleration |
| 3073 | for SHA1/SHA256 hashing. |
| 3074 | This affects the 'hash' command and also the |
| 3075 | hash_lookup_algo() function. |
| 3076 | CONFIG_SHA_PROG_HW_ACCEL - This option enables |
| 3077 | hardware-acceleration for SHA1/SHA256 progressive hashing. |
| 3078 | Data can be streamed in a block at a time and the hashing |
| 3079 | is performed in hardware. |
Simon Glass | 058bb8d | 2012-12-05 14:46:38 +0000 | [diff] [blame] | 3080 | |
| 3081 | Note: There is also a sha1sum command, which should perhaps |
| 3082 | be deprecated in favour of 'hash sha1'. |
| 3083 | |
Robert Winkler | 765ccf4 | 2013-07-24 17:57:06 -0700 | [diff] [blame] | 3084 | - Freescale i.MX specific commands: |
| 3085 | CONFIG_CMD_HDMIDETECT |
| 3086 | This enables 'hdmidet' command which returns true if an |
| 3087 | HDMI monitor is detected. This command is i.MX 6 specific. |
| 3088 | |
| 3089 | CONFIG_CMD_BMODE |
| 3090 | This enables the 'bmode' (bootmode) command for forcing |
| 3091 | a boot from specific media. |
| 3092 | |
| 3093 | This is useful for forcing the ROM's usb downloader to |
| 3094 | activate upon a watchdog reset which is nice when iterating |
| 3095 | on U-Boot. Using the reset button or running bmode normal |
| 3096 | will set it back to normal. This command currently |
| 3097 | supports i.MX53 and i.MX6. |
| 3098 | |
Heiko Schocher | 443ca40 | 2014-01-25 07:27:13 +0100 | [diff] [blame] | 3099 | - bootcount support: |
| 3100 | CONFIG_BOOTCOUNT_LIMIT |
| 3101 | |
| 3102 | This enables the bootcounter support, see: |
| 3103 | http://www.denx.de/wiki/DULG/UBootBootCountLimit |
| 3104 | |
| 3105 | CONFIG_AT91SAM9XE |
| 3106 | enable special bootcounter support on at91sam9xe based boards. |
| 3107 | CONFIG_BLACKFIN |
| 3108 | enable special bootcounter support on blackfin based boards. |
| 3109 | CONFIG_SOC_DA8XX |
| 3110 | enable special bootcounter support on da850 based boards. |
| 3111 | CONFIG_BOOTCOUNT_RAM |
| 3112 | enable support for the bootcounter in RAM |
| 3113 | CONFIG_BOOTCOUNT_I2C |
| 3114 | enable support for the bootcounter on an i2c (like RTC) device. |
| 3115 | CONFIG_SYS_I2C_RTC_ADDR = i2c chip address |
| 3116 | CONFIG_SYS_BOOTCOUNT_ADDR = i2c addr which is used for |
| 3117 | the bootcounter. |
| 3118 | CONFIG_BOOTCOUNT_ALEN = address len |
Simon Glass | 35191a3 | 2013-06-13 15:10:02 -0700 | [diff] [blame] | 3119 | |
wdenk | c0aa5c5 | 2003-12-06 19:49:23 +0000 | [diff] [blame] | 3120 | - Show boot progress: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3121 | CONFIG_SHOW_BOOT_PROGRESS |
| 3122 | |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 3123 | Defining this option allows to add some board- |
| 3124 | specific code (calling a user-provided function |
| 3125 | "show_boot_progress(int)") that enables you to show |
| 3126 | the system's boot progress on some display (for |
| 3127 | example, some LED's) on your board. At the moment, |
| 3128 | the following checkpoints are implemented: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3129 | |
Simon Glass | 0fa36a4 | 2012-09-28 08:56:37 +0000 | [diff] [blame] | 3130 | |
Marian Balakowicz | 74eb4ae | 2008-03-12 10:33:01 +0100 | [diff] [blame] | 3131 | Legacy uImage format: |
| 3132 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3133 | Arg Where When |
| 3134 | 1 common/cmd_bootm.c before attempting to boot an image |
wdenk | 544e973 | 2004-02-06 23:19:44 +0000 | [diff] [blame] | 3135 | -1 common/cmd_bootm.c Image header has bad magic number |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3136 | 2 common/cmd_bootm.c Image header has correct magic number |
wdenk | 544e973 | 2004-02-06 23:19:44 +0000 | [diff] [blame] | 3137 | -2 common/cmd_bootm.c Image header has bad checksum |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3138 | 3 common/cmd_bootm.c Image header has correct checksum |
wdenk | 544e973 | 2004-02-06 23:19:44 +0000 | [diff] [blame] | 3139 | -3 common/cmd_bootm.c Image data has bad checksum |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3140 | 4 common/cmd_bootm.c Image data has correct checksum |
| 3141 | -4 common/cmd_bootm.c Image is for unsupported architecture |
| 3142 | 5 common/cmd_bootm.c Architecture check OK |
Marian Balakowicz | 74eb4ae | 2008-03-12 10:33:01 +0100 | [diff] [blame] | 3143 | -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3144 | 6 common/cmd_bootm.c Image Type check OK |
| 3145 | -6 common/cmd_bootm.c gunzip uncompression error |
| 3146 | -7 common/cmd_bootm.c Unimplemented compression type |
| 3147 | 7 common/cmd_bootm.c Uncompression OK |
Marian Balakowicz | 74eb4ae | 2008-03-12 10:33:01 +0100 | [diff] [blame] | 3148 | 8 common/cmd_bootm.c No uncompress/copy overwrite error |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3149 | -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX) |
Marian Balakowicz | 74eb4ae | 2008-03-12 10:33:01 +0100 | [diff] [blame] | 3150 | |
| 3151 | 9 common/image.c Start initial ramdisk verification |
| 3152 | -10 common/image.c Ramdisk header has bad magic number |
| 3153 | -11 common/image.c Ramdisk header has bad checksum |
| 3154 | 10 common/image.c Ramdisk header is OK |
| 3155 | -12 common/image.c Ramdisk data has bad checksum |
| 3156 | 11 common/image.c Ramdisk data has correct checksum |
| 3157 | 12 common/image.c Ramdisk verification complete, start loading |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 3158 | -13 common/image.c Wrong Image Type (not PPC Linux ramdisk) |
Marian Balakowicz | 74eb4ae | 2008-03-12 10:33:01 +0100 | [diff] [blame] | 3159 | 13 common/image.c Start multifile image verification |
| 3160 | 14 common/image.c No initial ramdisk, no multifile, continue. |
| 3161 | |
Wolfgang Denk | 092ae95 | 2011-10-26 10:21:21 +0000 | [diff] [blame] | 3162 | 15 arch/<arch>/lib/bootm.c All preparation done, transferring control to OS |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3163 | |
Stefan Roese | 88fbf93 | 2010-04-15 16:07:28 +0200 | [diff] [blame] | 3164 | -30 arch/powerpc/lib/board.c Fatal error, hang the system |
wdenk | d729d30 | 2004-02-27 00:07:27 +0000 | [diff] [blame] | 3165 | -31 post/post.c POST test failed, detected by post_output_backlog() |
| 3166 | -32 post/post.c POST test failed, detected by post_run_single() |
wdenk | e97d3d9 | 2004-02-23 22:22:28 +0000 | [diff] [blame] | 3167 | |
Heiko Schocher | 633e03a | 2007-06-22 19:11:54 +0200 | [diff] [blame] | 3168 | 34 common/cmd_doc.c before loading a Image from a DOC device |
| 3169 | -35 common/cmd_doc.c Bad usage of "doc" command |
| 3170 | 35 common/cmd_doc.c correct usage of "doc" command |
| 3171 | -36 common/cmd_doc.c No boot device |
| 3172 | 36 common/cmd_doc.c correct boot device |
| 3173 | -37 common/cmd_doc.c Unknown Chip ID on boot device |
| 3174 | 37 common/cmd_doc.c correct chip ID found, device available |
| 3175 | -38 common/cmd_doc.c Read Error on boot device |
| 3176 | 38 common/cmd_doc.c reading Image header from DOC device OK |
| 3177 | -39 common/cmd_doc.c Image header has bad magic number |
| 3178 | 39 common/cmd_doc.c Image header has correct magic number |
| 3179 | -40 common/cmd_doc.c Error reading Image from DOC device |
| 3180 | 40 common/cmd_doc.c Image header has correct magic number |
| 3181 | 41 common/cmd_ide.c before loading a Image from a IDE device |
| 3182 | -42 common/cmd_ide.c Bad usage of "ide" command |
| 3183 | 42 common/cmd_ide.c correct usage of "ide" command |
| 3184 | -43 common/cmd_ide.c No boot device |
| 3185 | 43 common/cmd_ide.c boot device found |
| 3186 | -44 common/cmd_ide.c Device not available |
| 3187 | 44 common/cmd_ide.c Device available |
| 3188 | -45 common/cmd_ide.c wrong partition selected |
| 3189 | 45 common/cmd_ide.c partition selected |
| 3190 | -46 common/cmd_ide.c Unknown partition table |
| 3191 | 46 common/cmd_ide.c valid partition table found |
| 3192 | -47 common/cmd_ide.c Invalid partition type |
| 3193 | 47 common/cmd_ide.c correct partition type |
| 3194 | -48 common/cmd_ide.c Error reading Image Header on boot device |
| 3195 | 48 common/cmd_ide.c reading Image Header from IDE device OK |
| 3196 | -49 common/cmd_ide.c Image header has bad magic number |
| 3197 | 49 common/cmd_ide.c Image header has correct magic number |
| 3198 | -50 common/cmd_ide.c Image header has bad checksum |
| 3199 | 50 common/cmd_ide.c Image header has correct checksum |
| 3200 | -51 common/cmd_ide.c Error reading Image from IDE device |
| 3201 | 51 common/cmd_ide.c reading Image from IDE device OK |
| 3202 | 52 common/cmd_nand.c before loading a Image from a NAND device |
| 3203 | -53 common/cmd_nand.c Bad usage of "nand" command |
| 3204 | 53 common/cmd_nand.c correct usage of "nand" command |
| 3205 | -54 common/cmd_nand.c No boot device |
| 3206 | 54 common/cmd_nand.c boot device found |
| 3207 | -55 common/cmd_nand.c Unknown Chip ID on boot device |
| 3208 | 55 common/cmd_nand.c correct chip ID found, device available |
| 3209 | -56 common/cmd_nand.c Error reading Image Header on boot device |
| 3210 | 56 common/cmd_nand.c reading Image Header from NAND device OK |
| 3211 | -57 common/cmd_nand.c Image header has bad magic number |
| 3212 | 57 common/cmd_nand.c Image header has correct magic number |
| 3213 | -58 common/cmd_nand.c Error reading Image from NAND device |
| 3214 | 58 common/cmd_nand.c reading Image from NAND device OK |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3215 | |
Heiko Schocher | 633e03a | 2007-06-22 19:11:54 +0200 | [diff] [blame] | 3216 | -60 common/env_common.c Environment has a bad CRC, using default |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3217 | |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 3218 | 64 net/eth.c starting with Ethernet configuration. |
Heiko Schocher | 633e03a | 2007-06-22 19:11:54 +0200 | [diff] [blame] | 3219 | -64 net/eth.c no Ethernet found. |
| 3220 | 65 net/eth.c Ethernet found. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3221 | |
Heiko Schocher | 633e03a | 2007-06-22 19:11:54 +0200 | [diff] [blame] | 3222 | -80 common/cmd_net.c usage wrong |
Joe Hershberger | c80b41b0 | 2015-04-08 01:41:21 -0500 | [diff] [blame] | 3223 | 80 common/cmd_net.c before calling net_loop() |
| 3224 | -81 common/cmd_net.c some error in net_loop() occurred |
| 3225 | 81 common/cmd_net.c net_loop() back without error |
Heiko Schocher | 633e03a | 2007-06-22 19:11:54 +0200 | [diff] [blame] | 3226 | -82 common/cmd_net.c size == 0 (File with size 0 loaded) |
| 3227 | 82 common/cmd_net.c trying automatic boot |
Wolfgang Denk | 85c25df | 2009-04-01 23:34:12 +0200 | [diff] [blame] | 3228 | 83 common/cmd_net.c running "source" command |
| 3229 | -83 common/cmd_net.c some error in automatic boot or "source" command |
Heiko Schocher | 633e03a | 2007-06-22 19:11:54 +0200 | [diff] [blame] | 3230 | 84 common/cmd_net.c end without errors |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3231 | |
Marian Balakowicz | 74eb4ae | 2008-03-12 10:33:01 +0100 | [diff] [blame] | 3232 | FIT uImage format: |
| 3233 | |
| 3234 | Arg Where When |
| 3235 | 100 common/cmd_bootm.c Kernel FIT Image has correct format |
| 3236 | -100 common/cmd_bootm.c Kernel FIT Image has incorrect format |
| 3237 | 101 common/cmd_bootm.c No Kernel subimage unit name, using configuration |
| 3238 | -101 common/cmd_bootm.c Can't get configuration for kernel subimage |
| 3239 | 102 common/cmd_bootm.c Kernel unit name specified |
| 3240 | -103 common/cmd_bootm.c Can't get kernel subimage node offset |
Marian Balakowicz | 0cd4f3d | 2008-03-12 10:35:46 +0100 | [diff] [blame] | 3241 | 103 common/cmd_bootm.c Found configuration node |
Marian Balakowicz | 74eb4ae | 2008-03-12 10:33:01 +0100 | [diff] [blame] | 3242 | 104 common/cmd_bootm.c Got kernel subimage node offset |
| 3243 | -104 common/cmd_bootm.c Kernel subimage hash verification failed |
| 3244 | 105 common/cmd_bootm.c Kernel subimage hash verification OK |
| 3245 | -105 common/cmd_bootm.c Kernel subimage is for unsupported architecture |
| 3246 | 106 common/cmd_bootm.c Architecture check OK |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 3247 | -106 common/cmd_bootm.c Kernel subimage has wrong type |
| 3248 | 107 common/cmd_bootm.c Kernel subimage type OK |
Marian Balakowicz | 74eb4ae | 2008-03-12 10:33:01 +0100 | [diff] [blame] | 3249 | -107 common/cmd_bootm.c Can't get kernel subimage data/size |
| 3250 | 108 common/cmd_bootm.c Got kernel subimage data/size |
| 3251 | -108 common/cmd_bootm.c Wrong image type (not legacy, FIT) |
| 3252 | -109 common/cmd_bootm.c Can't get kernel subimage type |
| 3253 | -110 common/cmd_bootm.c Can't get kernel subimage comp |
| 3254 | -111 common/cmd_bootm.c Can't get kernel subimage os |
| 3255 | -112 common/cmd_bootm.c Can't get kernel subimage load address |
| 3256 | -113 common/cmd_bootm.c Image uncompress/copy overwrite error |
| 3257 | |
| 3258 | 120 common/image.c Start initial ramdisk verification |
| 3259 | -120 common/image.c Ramdisk FIT image has incorrect format |
| 3260 | 121 common/image.c Ramdisk FIT image has correct format |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 3261 | 122 common/image.c No ramdisk subimage unit name, using configuration |
Marian Balakowicz | 74eb4ae | 2008-03-12 10:33:01 +0100 | [diff] [blame] | 3262 | -122 common/image.c Can't get configuration for ramdisk subimage |
| 3263 | 123 common/image.c Ramdisk unit name specified |
| 3264 | -124 common/image.c Can't get ramdisk subimage node offset |
| 3265 | 125 common/image.c Got ramdisk subimage node offset |
| 3266 | -125 common/image.c Ramdisk subimage hash verification failed |
| 3267 | 126 common/image.c Ramdisk subimage hash verification OK |
| 3268 | -126 common/image.c Ramdisk subimage for unsupported architecture |
| 3269 | 127 common/image.c Architecture check OK |
| 3270 | -127 common/image.c Can't get ramdisk subimage data/size |
| 3271 | 128 common/image.c Got ramdisk subimage data/size |
| 3272 | 129 common/image.c Can't get ramdisk load address |
| 3273 | -129 common/image.c Got ramdisk load address |
| 3274 | |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 3275 | -130 common/cmd_doc.c Incorrect FIT image format |
Marian Balakowicz | 74eb4ae | 2008-03-12 10:33:01 +0100 | [diff] [blame] | 3276 | 131 common/cmd_doc.c FIT image format OK |
| 3277 | |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 3278 | -140 common/cmd_ide.c Incorrect FIT image format |
Marian Balakowicz | 74eb4ae | 2008-03-12 10:33:01 +0100 | [diff] [blame] | 3279 | 141 common/cmd_ide.c FIT image format OK |
| 3280 | |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 3281 | -150 common/cmd_nand.c Incorrect FIT image format |
Marian Balakowicz | 74eb4ae | 2008-03-12 10:33:01 +0100 | [diff] [blame] | 3282 | 151 common/cmd_nand.c FIT image format OK |
| 3283 | |
Heiko Schocher | 515eb12 | 2014-05-28 11:33:33 +0200 | [diff] [blame] | 3284 | - legacy image format: |
| 3285 | CONFIG_IMAGE_FORMAT_LEGACY |
| 3286 | enables the legacy image format support in U-Boot. |
| 3287 | |
| 3288 | Default: |
| 3289 | enabled if CONFIG_FIT_SIGNATURE is not defined. |
| 3290 | |
| 3291 | CONFIG_DISABLE_IMAGE_LEGACY |
| 3292 | disable the legacy image format |
| 3293 | |
| 3294 | This define is introduced, as the legacy image format is |
| 3295 | enabled per default for backward compatibility. |
| 3296 | |
Gabe Black | d572e16 | 2012-10-25 16:31:10 +0000 | [diff] [blame] | 3297 | - FIT image support: |
Dirk Eibach | 88919ca | 2014-07-03 09:28:26 +0200 | [diff] [blame] | 3298 | CONFIG_FIT_DISABLE_SHA256 |
| 3299 | Supporting SHA256 hashes has quite an impact on binary size. |
| 3300 | For constrained systems sha256 hash support can be disabled |
| 3301 | with this option. |
| 3302 | |
Simon Glass | e3ee2fb | 2016-02-22 22:55:43 -0700 | [diff] [blame] | 3303 | TODO(sjg@chromium.org): Adjust this option to be positive, |
| 3304 | and move it to Kconfig |
| 3305 | |
Wolfgang Denk | d590fb1 | 2011-10-07 09:58:21 +0200 | [diff] [blame] | 3306 | - Standalone program support: |
| 3307 | CONFIG_STANDALONE_LOAD_ADDR |
| 3308 | |
Wolfgang Denk | 23f7848 | 2011-10-09 21:06:34 +0200 | [diff] [blame] | 3309 | This option defines a board specific value for the |
| 3310 | address where standalone program gets loaded, thus |
| 3311 | overwriting the architecture dependent default |
Wolfgang Denk | d590fb1 | 2011-10-07 09:58:21 +0200 | [diff] [blame] | 3312 | settings. |
| 3313 | |
| 3314 | - Frame Buffer Address: |
| 3315 | CONFIG_FB_ADDR |
| 3316 | |
| 3317 | Define CONFIG_FB_ADDR if you want to use specific |
Wolfgang Denk | a71eb8e | 2013-01-03 00:43:59 +0000 | [diff] [blame] | 3318 | address for frame buffer. This is typically the case |
| 3319 | when using a graphics controller has separate video |
| 3320 | memory. U-Boot will then place the frame buffer at |
| 3321 | the given address instead of dynamically reserving it |
| 3322 | in system RAM by calling lcd_setmem(), which grabs |
| 3323 | the memory for the frame buffer depending on the |
| 3324 | configured panel size. |
Wolfgang Denk | d590fb1 | 2011-10-07 09:58:21 +0200 | [diff] [blame] | 3325 | |
| 3326 | Please see board_init_f function. |
| 3327 | |
Detlev Zundel | 0ecb611 | 2009-12-01 17:16:19 +0100 | [diff] [blame] | 3328 | - Automatic software updates via TFTP server |
| 3329 | CONFIG_UPDATE_TFTP |
| 3330 | CONFIG_UPDATE_TFTP_CNT_MAX |
| 3331 | CONFIG_UPDATE_TFTP_MSEC_MAX |
| 3332 | |
| 3333 | These options enable and control the auto-update feature; |
| 3334 | for a more detailed description refer to doc/README.update. |
| 3335 | |
| 3336 | - MTD Support (mtdparts command, UBI support) |
| 3337 | CONFIG_MTD_DEVICE |
| 3338 | |
| 3339 | Adds the MTD device infrastructure from the Linux kernel. |
| 3340 | Needed for mtdparts command support. |
| 3341 | |
| 3342 | CONFIG_MTD_PARTITIONS |
| 3343 | |
| 3344 | Adds the MTD partitioning infrastructure from the Linux |
| 3345 | kernel. Needed for UBI support. |
| 3346 | |
Joe Hershberger | 7d80fc1 | 2013-04-08 10:32:48 +0000 | [diff] [blame] | 3347 | - UBI support |
| 3348 | CONFIG_CMD_UBI |
| 3349 | |
| 3350 | Adds commands for interacting with MTD partitions formatted |
| 3351 | with the UBI flash translation layer |
| 3352 | |
| 3353 | Requires also defining CONFIG_RBTREE |
| 3354 | |
Joe Hershberger | 47550fc | 2013-04-08 10:32:49 +0000 | [diff] [blame] | 3355 | CONFIG_UBI_SILENCE_MSG |
| 3356 | |
| 3357 | Make the verbose messages from UBI stop printing. This leaves |
| 3358 | warnings and errors enabled. |
| 3359 | |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 3360 | |
| 3361 | CONFIG_MTD_UBI_WL_THRESHOLD |
| 3362 | This parameter defines the maximum difference between the highest |
| 3363 | erase counter value and the lowest erase counter value of eraseblocks |
| 3364 | of UBI devices. When this threshold is exceeded, UBI starts performing |
| 3365 | wear leveling by means of moving data from eraseblock with low erase |
| 3366 | counter to eraseblocks with high erase counter. |
| 3367 | |
| 3368 | The default value should be OK for SLC NAND flashes, NOR flashes and |
| 3369 | other flashes which have eraseblock life-cycle 100000 or more. |
| 3370 | However, in case of MLC NAND flashes which typically have eraseblock |
| 3371 | life-cycle less than 10000, the threshold should be lessened (e.g., |
| 3372 | to 128 or 256, although it does not have to be power of 2). |
| 3373 | |
| 3374 | default: 4096 |
Simon Glass | 6c0be91 | 2014-10-23 18:58:54 -0600 | [diff] [blame] | 3375 | |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 3376 | CONFIG_MTD_UBI_BEB_LIMIT |
| 3377 | This option specifies the maximum bad physical eraseblocks UBI |
| 3378 | expects on the MTD device (per 1024 eraseblocks). If the |
| 3379 | underlying flash does not admit of bad eraseblocks (e.g. NOR |
| 3380 | flash), this value is ignored. |
| 3381 | |
| 3382 | NAND datasheets often specify the minimum and maximum NVM |
| 3383 | (Number of Valid Blocks) for the flashes' endurance lifetime. |
| 3384 | The maximum expected bad eraseblocks per 1024 eraseblocks |
| 3385 | then can be calculated as "1024 * (1 - MinNVB / MaxNVB)", |
| 3386 | which gives 20 for most NANDs (MaxNVB is basically the total |
| 3387 | count of eraseblocks on the chip). |
| 3388 | |
| 3389 | To put it differently, if this value is 20, UBI will try to |
| 3390 | reserve about 1.9% of physical eraseblocks for bad blocks |
| 3391 | handling. And that will be 1.9% of eraseblocks on the entire |
| 3392 | NAND chip, not just the MTD partition UBI attaches. This means |
| 3393 | that if you have, say, a NAND flash chip admits maximum 40 bad |
| 3394 | eraseblocks, and it is split on two MTD partitions of the same |
| 3395 | size, UBI will reserve 40 eraseblocks when attaching a |
| 3396 | partition. |
| 3397 | |
| 3398 | default: 20 |
| 3399 | |
| 3400 | CONFIG_MTD_UBI_FASTMAP |
| 3401 | Fastmap is a mechanism which allows attaching an UBI device |
| 3402 | in nearly constant time. Instead of scanning the whole MTD device it |
| 3403 | only has to locate a checkpoint (called fastmap) on the device. |
| 3404 | The on-flash fastmap contains all information needed to attach |
| 3405 | the device. Using fastmap makes only sense on large devices where |
| 3406 | attaching by scanning takes long. UBI will not automatically install |
| 3407 | a fastmap on old images, but you can set the UBI parameter |
| 3408 | CONFIG_MTD_UBI_FASTMAP_AUTOCONVERT to 1 if you want so. Please note |
| 3409 | that fastmap-enabled images are still usable with UBI implementations |
| 3410 | without fastmap support. On typical flash devices the whole fastmap |
| 3411 | fits into one PEB. UBI will reserve PEBs to hold two fastmaps. |
| 3412 | |
| 3413 | CONFIG_MTD_UBI_FASTMAP_AUTOCONVERT |
| 3414 | Set this parameter to enable fastmap automatically on images |
| 3415 | without a fastmap. |
| 3416 | default: 0 |
| 3417 | |
Heiko Schocher | 94b66de | 2015-10-22 06:19:21 +0200 | [diff] [blame] | 3418 | CONFIG_MTD_UBI_FM_DEBUG |
| 3419 | Enable UBI fastmap debug |
| 3420 | default: 0 |
| 3421 | |
Joe Hershberger | 7d80fc1 | 2013-04-08 10:32:48 +0000 | [diff] [blame] | 3422 | - UBIFS support |
| 3423 | CONFIG_CMD_UBIFS |
| 3424 | |
| 3425 | Adds commands for interacting with UBI volumes formatted as |
| 3426 | UBIFS. UBIFS is read-only in u-boot. |
| 3427 | |
| 3428 | Requires UBI support as well as CONFIG_LZO |
| 3429 | |
Joe Hershberger | 47550fc | 2013-04-08 10:32:49 +0000 | [diff] [blame] | 3430 | CONFIG_UBIFS_SILENCE_MSG |
| 3431 | |
| 3432 | Make the verbose messages from UBIFS stop printing. This leaves |
| 3433 | warnings and errors enabled. |
| 3434 | |
Daniel Schwierzeck | 39ca08e | 2011-07-18 07:48:07 +0000 | [diff] [blame] | 3435 | - SPL framework |
Wolfgang Denk | 825223d | 2011-09-11 21:24:09 +0200 | [diff] [blame] | 3436 | CONFIG_SPL |
| 3437 | Enable building of SPL globally. |
Daniel Schwierzeck | 39ca08e | 2011-07-18 07:48:07 +0000 | [diff] [blame] | 3438 | |
Tom Rini | 3685385 | 2012-02-14 07:29:40 +0000 | [diff] [blame] | 3439 | CONFIG_SPL_LDSCRIPT |
| 3440 | LDSCRIPT for linking the SPL binary. |
| 3441 | |
Albert ARIBAUD | e916e05 | 2013-04-12 05:14:30 +0000 | [diff] [blame] | 3442 | CONFIG_SPL_MAX_FOOTPRINT |
| 3443 | Maximum size in memory allocated to the SPL, BSS included. |
| 3444 | When defined, the linker checks that the actual memory |
| 3445 | used by SPL from _start to __bss_end does not exceed it. |
Albert ARIBAUD | afab148 | 2013-04-14 04:48:38 +0000 | [diff] [blame] | 3446 | CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE |
Albert ARIBAUD | e916e05 | 2013-04-12 05:14:30 +0000 | [diff] [blame] | 3447 | must not be both defined at the same time. |
| 3448 | |
Tom Rini | 3685385 | 2012-02-14 07:29:40 +0000 | [diff] [blame] | 3449 | CONFIG_SPL_MAX_SIZE |
Albert ARIBAUD | e916e05 | 2013-04-12 05:14:30 +0000 | [diff] [blame] | 3450 | Maximum size of the SPL image (text, data, rodata, and |
| 3451 | linker lists sections), BSS excluded. |
| 3452 | When defined, the linker checks that the actual size does |
| 3453 | not exceed it. |
Tom Rini | 3685385 | 2012-02-14 07:29:40 +0000 | [diff] [blame] | 3454 | |
Wolfgang Denk | 825223d | 2011-09-11 21:24:09 +0200 | [diff] [blame] | 3455 | CONFIG_SPL_TEXT_BASE |
| 3456 | TEXT_BASE for linking the SPL binary. |
Daniel Schwierzeck | 39ca08e | 2011-07-18 07:48:07 +0000 | [diff] [blame] | 3457 | |
Scott Wood | c4f0d00 | 2012-09-20 19:05:12 -0500 | [diff] [blame] | 3458 | CONFIG_SPL_RELOC_TEXT_BASE |
| 3459 | Address to relocate to. If unspecified, this is equal to |
| 3460 | CONFIG_SPL_TEXT_BASE (i.e. no relocation is done). |
| 3461 | |
Tom Rini | 3685385 | 2012-02-14 07:29:40 +0000 | [diff] [blame] | 3462 | CONFIG_SPL_BSS_START_ADDR |
| 3463 | Link address for the BSS within the SPL binary. |
| 3464 | |
| 3465 | CONFIG_SPL_BSS_MAX_SIZE |
Albert ARIBAUD | e916e05 | 2013-04-12 05:14:30 +0000 | [diff] [blame] | 3466 | Maximum size in memory allocated to the SPL BSS. |
| 3467 | When defined, the linker checks that the actual memory used |
| 3468 | by SPL from __bss_start to __bss_end does not exceed it. |
Albert ARIBAUD | afab148 | 2013-04-14 04:48:38 +0000 | [diff] [blame] | 3469 | CONFIG_SPL_MAX_FOOTPRINT and CONFIG_SPL_BSS_MAX_SIZE |
Albert ARIBAUD | e916e05 | 2013-04-12 05:14:30 +0000 | [diff] [blame] | 3470 | must not be both defined at the same time. |
Tom Rini | 3685385 | 2012-02-14 07:29:40 +0000 | [diff] [blame] | 3471 | |
| 3472 | CONFIG_SPL_STACK |
| 3473 | Adress of the start of the stack SPL will use |
| 3474 | |
Albert ARIBAUD \(3ADEV\) | 287b094 | 2015-03-31 11:40:50 +0200 | [diff] [blame] | 3475 | CONFIG_SPL_PANIC_ON_RAW_IMAGE |
| 3476 | When defined, SPL will panic() if the image it has |
| 3477 | loaded does not have a signature. |
| 3478 | Defining this is useful when code which loads images |
| 3479 | in SPL cannot guarantee that absolutely all read errors |
| 3480 | will be caught. |
| 3481 | An example is the LPC32XX MLC NAND driver, which will |
| 3482 | consider that a completely unreadable NAND block is bad, |
| 3483 | and thus should be skipped silently. |
| 3484 | |
Marek Vasut | bf541b2 | 2016-04-29 00:44:55 +0200 | [diff] [blame] | 3485 | CONFIG_SPL_ABORT_ON_RAW_IMAGE |
| 3486 | When defined, SPL will proceed to another boot method |
| 3487 | if the image it has loaded does not have a signature. |
| 3488 | |
Scott Wood | c4f0d00 | 2012-09-20 19:05:12 -0500 | [diff] [blame] | 3489 | CONFIG_SPL_RELOC_STACK |
| 3490 | Adress of the start of the stack SPL will use after |
| 3491 | relocation. If unspecified, this is equal to |
| 3492 | CONFIG_SPL_STACK. |
| 3493 | |
Tom Rini | 3685385 | 2012-02-14 07:29:40 +0000 | [diff] [blame] | 3494 | CONFIG_SYS_SPL_MALLOC_START |
| 3495 | Starting address of the malloc pool used in SPL. |
Fabio Estevam | 38e1a97 | 2015-11-12 12:30:19 -0200 | [diff] [blame] | 3496 | When this option is set the full malloc is used in SPL and |
| 3497 | it is set up by spl_init() and before that, the simple malloc() |
| 3498 | can be used if CONFIG_SYS_MALLOC_F is defined. |
Tom Rini | 3685385 | 2012-02-14 07:29:40 +0000 | [diff] [blame] | 3499 | |
| 3500 | CONFIG_SYS_SPL_MALLOC_SIZE |
| 3501 | The size of the malloc pool used in SPL. |
Daniel Schwierzeck | 39ca08e | 2011-07-18 07:48:07 +0000 | [diff] [blame] | 3502 | |
Tom Rini | 28591df | 2012-08-13 12:03:19 -0700 | [diff] [blame] | 3503 | CONFIG_SPL_FRAMEWORK |
| 3504 | Enable the SPL framework under common/. This framework |
| 3505 | supports MMC, NAND and YMODEM loading of U-Boot and NAND |
| 3506 | NAND loading of the Linux Kernel. |
| 3507 | |
Tom Rini | c2b7600 | 2014-03-28 12:03:39 -0400 | [diff] [blame] | 3508 | CONFIG_SPL_OS_BOOT |
| 3509 | Enable booting directly to an OS from SPL. |
| 3510 | See also: doc/README.falcon |
| 3511 | |
Tom Rini | fe3b0c7 | 2012-08-13 11:37:56 -0700 | [diff] [blame] | 3512 | CONFIG_SPL_DISPLAY_PRINT |
| 3513 | For ARM, enable an optional function to print more information |
| 3514 | about the running system. |
| 3515 | |
Scott Wood | 7c81090 | 2012-09-20 16:35:21 -0500 | [diff] [blame] | 3516 | CONFIG_SPL_INIT_MINIMAL |
| 3517 | Arch init code should be built for a very small image |
| 3518 | |
Tom Rini | 3685385 | 2012-02-14 07:29:40 +0000 | [diff] [blame] | 3519 | CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, |
| 3520 | CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS, |
Paul Kocialkowski | 341e8cd | 2014-11-08 23:14:55 +0100 | [diff] [blame] | 3521 | Address and partition on the MMC to load U-Boot from |
Tom Rini | 3685385 | 2012-02-14 07:29:40 +0000 | [diff] [blame] | 3522 | when the MMC is being used in raw mode. |
| 3523 | |
Paul Kocialkowski | 17675c8 | 2014-11-08 23:14:56 +0100 | [diff] [blame] | 3524 | CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION |
| 3525 | Partition on the MMC to load U-Boot from when the MMC is being |
| 3526 | used in raw mode |
| 3527 | |
Peter Korsgaard | 01b542f | 2013-05-13 08:36:29 +0000 | [diff] [blame] | 3528 | CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR |
| 3529 | Sector to load kernel uImage from when MMC is being |
| 3530 | used in raw mode (for Falcon mode) |
| 3531 | |
| 3532 | CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR, |
| 3533 | CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS |
| 3534 | Sector and number of sectors to load kernel argument |
| 3535 | parameters from when MMC is being used in raw mode |
| 3536 | (for falcon mode) |
| 3537 | |
Paul Kocialkowski | 341e8cd | 2014-11-08 23:14:55 +0100 | [diff] [blame] | 3538 | CONFIG_SYS_MMCSD_FS_BOOT_PARTITION |
| 3539 | Partition on the MMC to load U-Boot from when the MMC is being |
| 3540 | used in fs mode |
| 3541 | |
Guillaume GARDET | 5065b71 | 2014-10-15 17:53:13 +0200 | [diff] [blame] | 3542 | CONFIG_SPL_FS_LOAD_PAYLOAD_NAME |
| 3543 | Filename to read to load U-Boot when reading from filesystem |
| 3544 | |
| 3545 | CONFIG_SPL_FS_LOAD_KERNEL_NAME |
Peter Korsgaard | 465f1f8 | 2013-05-13 08:36:27 +0000 | [diff] [blame] | 3546 | Filename to read to load kernel uImage when reading |
Guillaume GARDET | 5065b71 | 2014-10-15 17:53:13 +0200 | [diff] [blame] | 3547 | from filesystem (for Falcon mode) |
Peter Korsgaard | 465f1f8 | 2013-05-13 08:36:27 +0000 | [diff] [blame] | 3548 | |
Guillaume GARDET | 5065b71 | 2014-10-15 17:53:13 +0200 | [diff] [blame] | 3549 | CONFIG_SPL_FS_LOAD_ARGS_NAME |
Peter Korsgaard | 465f1f8 | 2013-05-13 08:36:27 +0000 | [diff] [blame] | 3550 | Filename to read to load kernel argument parameters |
Guillaume GARDET | 5065b71 | 2014-10-15 17:53:13 +0200 | [diff] [blame] | 3551 | when reading from filesystem (for Falcon mode) |
Peter Korsgaard | 465f1f8 | 2013-05-13 08:36:27 +0000 | [diff] [blame] | 3552 | |
Scott Wood | 2b36fbb | 2012-12-06 13:33:17 +0000 | [diff] [blame] | 3553 | CONFIG_SPL_MPC83XX_WAIT_FOR_NAND |
| 3554 | Set this for NAND SPL on PPC mpc83xx targets, so that |
| 3555 | start.S waits for the rest of the SPL to load before |
| 3556 | continuing (the hardware starts execution after just |
| 3557 | loading the first page rather than the full 4K). |
| 3558 | |
Prabhakar Kushwaha | 6e2b9a3 | 2014-04-08 19:12:31 +0530 | [diff] [blame] | 3559 | CONFIG_SPL_SKIP_RELOCATE |
| 3560 | Avoid SPL relocation |
| 3561 | |
Scott Wood | c352a0c | 2012-09-20 19:09:07 -0500 | [diff] [blame] | 3562 | CONFIG_SPL_NAND_BASE |
| 3563 | Include nand_base.c in the SPL. Requires |
| 3564 | CONFIG_SPL_NAND_DRIVERS. |
| 3565 | |
| 3566 | CONFIG_SPL_NAND_DRIVERS |
| 3567 | SPL uses normal NAND drivers, not minimal drivers. |
| 3568 | |
| 3569 | CONFIG_SPL_NAND_ECC |
| 3570 | Include standard software ECC in the SPL |
| 3571 | |
Tom Rini | 3685385 | 2012-02-14 07:29:40 +0000 | [diff] [blame] | 3572 | CONFIG_SPL_NAND_SIMPLE |
Scott Wood | 36c440e | 2012-09-21 18:35:27 -0500 | [diff] [blame] | 3573 | Support for NAND boot using simple NAND drivers that |
| 3574 | expose the cmd_ctrl() interface. |
Tom Rini | 3685385 | 2012-02-14 07:29:40 +0000 | [diff] [blame] | 3575 | |
Thomas Gleixner | 820d24d | 2016-07-12 20:28:12 +0200 | [diff] [blame] | 3576 | CONFIG_SPL_UBI |
| 3577 | Support for a lightweight UBI (fastmap) scanner and |
| 3578 | loader |
| 3579 | |
Heiko Schocher | cf00027 | 2014-10-31 08:31:00 +0100 | [diff] [blame] | 3580 | CONFIG_SPL_NAND_RAW_ONLY |
| 3581 | Support to boot only raw u-boot.bin images. Use this only |
| 3582 | if you need to save space. |
| 3583 | |
Ying Zhang | dfb2b15 | 2013-08-16 15:16:12 +0800 | [diff] [blame] | 3584 | CONFIG_SPL_COMMON_INIT_DDR |
| 3585 | Set for common ddr init with serial presence detect in |
| 3586 | SPL binary. |
| 3587 | |
Tom Rini | 3685385 | 2012-02-14 07:29:40 +0000 | [diff] [blame] | 3588 | CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT, |
| 3589 | CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE, |
| 3590 | CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS, |
| 3591 | CONFIG_SYS_NAND_ECCPOS, CONFIG_SYS_NAND_ECCSIZE, |
| 3592 | CONFIG_SYS_NAND_ECCBYTES |
| 3593 | Defines the size and behavior of the NAND that SPL uses |
Scott Wood | 36c440e | 2012-09-21 18:35:27 -0500 | [diff] [blame] | 3594 | to read U-Boot |
Tom Rini | 3685385 | 2012-02-14 07:29:40 +0000 | [diff] [blame] | 3595 | |
Prabhakar Kushwaha | afffcb0 | 2013-12-11 12:42:11 +0530 | [diff] [blame] | 3596 | CONFIG_SPL_NAND_BOOT |
| 3597 | Add support NAND boot |
| 3598 | |
Tom Rini | 3685385 | 2012-02-14 07:29:40 +0000 | [diff] [blame] | 3599 | CONFIG_SYS_NAND_U_BOOT_OFFS |
Scott Wood | 36c440e | 2012-09-21 18:35:27 -0500 | [diff] [blame] | 3600 | Location in NAND to read U-Boot from |
| 3601 | |
| 3602 | CONFIG_SYS_NAND_U_BOOT_DST |
| 3603 | Location in memory to load U-Boot to |
| 3604 | |
| 3605 | CONFIG_SYS_NAND_U_BOOT_SIZE |
| 3606 | Size of image to load |
Tom Rini | 3685385 | 2012-02-14 07:29:40 +0000 | [diff] [blame] | 3607 | |
| 3608 | CONFIG_SYS_NAND_U_BOOT_START |
Scott Wood | 36c440e | 2012-09-21 18:35:27 -0500 | [diff] [blame] | 3609 | Entry point in loaded image to jump to |
Tom Rini | 3685385 | 2012-02-14 07:29:40 +0000 | [diff] [blame] | 3610 | |
| 3611 | CONFIG_SYS_NAND_HW_ECC_OOBFIRST |
| 3612 | Define this if you need to first read the OOB and then the |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 3613 | data. This is used, for example, on davinci platforms. |
Tom Rini | 3685385 | 2012-02-14 07:29:40 +0000 | [diff] [blame] | 3614 | |
| 3615 | CONFIG_SPL_OMAP3_ID_NAND |
| 3616 | Support for an OMAP3-specific set of functions to return the |
| 3617 | ID and MFR of the first attached NAND chip, if present. |
| 3618 | |
Pavel Machek | de99725 | 2012-08-30 22:42:11 +0200 | [diff] [blame] | 3619 | CONFIG_SPL_RAM_DEVICE |
| 3620 | Support for running image already present in ram, in SPL binary |
| 3621 | |
Scott Wood | eb7bd97 | 2012-12-06 13:33:16 +0000 | [diff] [blame] | 3622 | CONFIG_SPL_PAD_TO |
Benoît Thébaudeau | f018072 | 2013-04-11 09:35:49 +0000 | [diff] [blame] | 3623 | Image offset to which the SPL should be padded before appending |
| 3624 | the SPL payload. By default, this is defined as |
| 3625 | CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. |
| 3626 | CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL |
| 3627 | payload without any padding, or >= CONFIG_SPL_MAX_SIZE. |
Scott Wood | eb7bd97 | 2012-12-06 13:33:16 +0000 | [diff] [blame] | 3628 | |
Scott Wood | f147eb7 | 2012-09-21 16:27:32 -0500 | [diff] [blame] | 3629 | CONFIG_SPL_TARGET |
| 3630 | Final target image containing SPL and payload. Some SPLs |
| 3631 | use an arch-specific makefile fragment instead, for |
| 3632 | example if more than one image needs to be produced. |
| 3633 | |
Simon Glass | 82d9453 | 2013-05-08 08:05:59 +0000 | [diff] [blame] | 3634 | CONFIG_FIT_SPL_PRINT |
| 3635 | Printing information about a FIT image adds quite a bit of |
| 3636 | code to SPL. So this is normally disabled in SPL. Use this |
| 3637 | option to re-enable it. This will affect the output of the |
| 3638 | bootm command when booting a FIT image. |
| 3639 | |
Ying Zhang | 2d2e3b6 | 2013-08-16 15:16:15 +0800 | [diff] [blame] | 3640 | - TPL framework |
| 3641 | CONFIG_TPL |
| 3642 | Enable building of TPL globally. |
| 3643 | |
| 3644 | CONFIG_TPL_PAD_TO |
| 3645 | Image offset to which the TPL should be padded before appending |
| 3646 | the TPL payload. By default, this is defined as |
Wolfgang Denk | ec7fbf5 | 2013-10-04 17:43:24 +0200 | [diff] [blame] | 3647 | CONFIG_SPL_MAX_SIZE, or 0 if CONFIG_SPL_MAX_SIZE is undefined. |
| 3648 | CONFIG_SPL_PAD_TO must be either 0, meaning to append the SPL |
| 3649 | payload without any padding, or >= CONFIG_SPL_MAX_SIZE. |
Ying Zhang | 2d2e3b6 | 2013-08-16 15:16:15 +0800 | [diff] [blame] | 3650 | |
wdenk | c0aa5c5 | 2003-12-06 19:49:23 +0000 | [diff] [blame] | 3651 | - Interrupt support (PPC): |
| 3652 | |
wdenk | 1ebf41e | 2004-01-02 14:00:00 +0000 | [diff] [blame] | 3653 | There are common interrupt_init() and timer_interrupt() |
| 3654 | for all PPC archs. interrupt_init() calls interrupt_init_cpu() |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 3655 | for CPU specific initialization. interrupt_init_cpu() |
wdenk | 1ebf41e | 2004-01-02 14:00:00 +0000 | [diff] [blame] | 3656 | should set decrementer_count to appropriate value. If |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 3657 | CPU resets decrementer automatically after interrupt |
wdenk | 1ebf41e | 2004-01-02 14:00:00 +0000 | [diff] [blame] | 3658 | (ppc4xx) it should set decrementer_count to zero. |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 3659 | timer_interrupt() calls timer_interrupt_cpu() for CPU |
wdenk | 1ebf41e | 2004-01-02 14:00:00 +0000 | [diff] [blame] | 3660 | specific handling. If board has watchdog / status_led |
| 3661 | / other_activity_monitor it works automatically from |
| 3662 | general timer_interrupt(). |
wdenk | c0aa5c5 | 2003-12-06 19:49:23 +0000 | [diff] [blame] | 3663 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3664 | |
Helmut Raiger | d5a184b | 2011-10-20 04:19:47 +0000 | [diff] [blame] | 3665 | Board initialization settings: |
| 3666 | ------------------------------ |
| 3667 | |
| 3668 | During Initialization u-boot calls a number of board specific functions |
| 3669 | to allow the preparation of board specific prerequisites, e.g. pin setup |
| 3670 | before drivers are initialized. To enable these callbacks the |
| 3671 | following configuration macros have to be defined. Currently this is |
| 3672 | architecture specific, so please check arch/your_architecture/lib/board.c |
| 3673 | typically in board_init_f() and board_init_r(). |
| 3674 | |
| 3675 | - CONFIG_BOARD_EARLY_INIT_F: Call board_early_init_f() |
| 3676 | - CONFIG_BOARD_EARLY_INIT_R: Call board_early_init_r() |
| 3677 | - CONFIG_BOARD_LATE_INIT: Call board_late_init() |
| 3678 | - CONFIG_BOARD_POSTCLK_INIT: Call board_postclk_init() |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3679 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3680 | Configuration Settings: |
| 3681 | ----------------------- |
| 3682 | |
York Sun | 6c48001 | 2014-02-26 17:03:19 -0800 | [diff] [blame] | 3683 | - CONFIG_SYS_SUPPORT_64BIT_DATA: Defined automatically if compiled as 64-bit. |
| 3684 | Optionally it can be defined to support 64-bit memory commands. |
| 3685 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3686 | - CONFIG_SYS_LONGHELP: Defined when you want long help messages included; |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3687 | undefine this when you're short of memory. |
| 3688 | |
Peter Tyser | dfb72b8 | 2009-01-27 18:03:12 -0600 | [diff] [blame] | 3689 | - CONFIG_SYS_HELP_CMD_WIDTH: Defined when you want to override the default |
| 3690 | width of the commands listed in the 'help' command output. |
| 3691 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3692 | - CONFIG_SYS_PROMPT: This is what U-Boot prints on the console to |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3693 | prompt for user input. |
| 3694 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3695 | - CONFIG_SYS_CBSIZE: Buffer size for input from the Console |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3696 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3697 | - CONFIG_SYS_PBSIZE: Buffer size for Console output |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3698 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3699 | - CONFIG_SYS_MAXARGS: max. Number of arguments accepted for monitor commands |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3700 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3701 | - CONFIG_SYS_BARGSIZE: Buffer size for Boot Arguments which are passed to |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3702 | the application (usually a Linux kernel) when it is |
| 3703 | booted |
| 3704 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3705 | - CONFIG_SYS_BAUDRATE_TABLE: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3706 | List of legal baudrate settings for this board. |
| 3707 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3708 | - CONFIG_SYS_CONSOLE_INFO_QUIET |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 3709 | Suppress display of console information at boot. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3710 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3711 | - CONFIG_SYS_CONSOLE_IS_IN_ENV |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 3712 | If the board specific function |
| 3713 | extern int overwrite_console (void); |
| 3714 | returns 1, the stdin, stderr and stdout are switched to the |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3715 | serial port, else the settings in the environment are used. |
| 3716 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3717 | - CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 3718 | Enable the call to overwrite_console(). |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3719 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3720 | - CONFIG_SYS_CONSOLE_ENV_OVERWRITE |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3721 | Enable overwrite of previous console environment settings. |
| 3722 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3723 | - CONFIG_SYS_MEMTEST_START, CONFIG_SYS_MEMTEST_END: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3724 | Begin and End addresses of the area used by the |
| 3725 | simple memory test. |
| 3726 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3727 | - CONFIG_SYS_ALT_MEMTEST: |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 3728 | Enable an alternate, more extensive memory test. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3729 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3730 | - CONFIG_SYS_MEMTEST_SCRATCH: |
wdenk | 5958f4a | 2003-09-18 09:21:33 +0000 | [diff] [blame] | 3731 | Scratch address used by the alternate memory test |
| 3732 | You only need to set this if address zero isn't writeable |
| 3733 | |
York Sun | 5d286cd | 2015-12-04 11:57:07 -0800 | [diff] [blame] | 3734 | - CONFIG_SYS_MEM_RESERVE_SECURE |
York Sun | 1ef95cc | 2016-06-24 16:46:18 -0700 | [diff] [blame] | 3735 | Only implemented for ARMv8 for now. |
York Sun | 5d286cd | 2015-12-04 11:57:07 -0800 | [diff] [blame] | 3736 | If defined, the size of CONFIG_SYS_MEM_RESERVE_SECURE memory |
| 3737 | is substracted from total RAM and won't be reported to OS. |
| 3738 | This memory can be used as secure memory. A variable |
York Sun | 1ef95cc | 2016-06-24 16:46:18 -0700 | [diff] [blame] | 3739 | gd->arch.secure_ram is used to track the location. In systems |
York Sun | 5d286cd | 2015-12-04 11:57:07 -0800 | [diff] [blame] | 3740 | the RAM base is not zero, or RAM is divided into banks, |
| 3741 | this variable needs to be recalcuated to get the address. |
| 3742 | |
York Sun | 5073937 | 2015-12-07 11:05:29 -0800 | [diff] [blame] | 3743 | - CONFIG_SYS_MEM_TOP_HIDE: |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3744 | If CONFIG_SYS_MEM_TOP_HIDE is defined in the board config header, |
Stefan Roese | a13709f | 2008-03-26 10:14:11 +0100 | [diff] [blame] | 3745 | this specified memory area will get subtracted from the top |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 3746 | (end) of RAM and won't get "touched" at all by U-Boot. By |
Stefan Roese | a13709f | 2008-03-26 10:14:11 +0100 | [diff] [blame] | 3747 | fixing up gd->ram_size the Linux kernel should gets passed |
| 3748 | the now "corrected" memory size and won't touch it either. |
| 3749 | This should work for arch/ppc and arch/powerpc. Only Linux |
Stefan Roese | 37f31bf | 2008-03-28 11:02:53 +0100 | [diff] [blame] | 3750 | board ports in arch/powerpc with bootwrapper support that |
Stefan Roese | a13709f | 2008-03-26 10:14:11 +0100 | [diff] [blame] | 3751 | recalculate the memory size from the SDRAM controller setup |
Stefan Roese | 37f31bf | 2008-03-28 11:02:53 +0100 | [diff] [blame] | 3752 | will have to get fixed in Linux additionally. |
Stefan Roese | a13709f | 2008-03-26 10:14:11 +0100 | [diff] [blame] | 3753 | |
| 3754 | This option can be used as a workaround for the 440EPx/GRx |
| 3755 | CHIP 11 errata where the last 256 bytes in SDRAM shouldn't |
| 3756 | be touched. |
| 3757 | |
| 3758 | WARNING: Please make sure that this value is a multiple of |
| 3759 | the Linux page size (normally 4k). If this is not the case, |
| 3760 | then the end address of the Linux memory will be located at a |
| 3761 | non page size aligned address and this could cause major |
| 3762 | problems. |
| 3763 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3764 | - CONFIG_SYS_LOADS_BAUD_CHANGE: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3765 | Enable temporary baudrate change while serial download |
| 3766 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3767 | - CONFIG_SYS_SDRAM_BASE: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3768 | Physical start address of SDRAM. _Must_ be 0 here. |
| 3769 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3770 | - CONFIG_SYS_MBIO_BASE: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3771 | Physical start address of Motherboard I/O (if using a |
| 3772 | Cogent motherboard) |
| 3773 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3774 | - CONFIG_SYS_FLASH_BASE: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3775 | Physical start address of Flash memory. |
| 3776 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3777 | - CONFIG_SYS_MONITOR_BASE: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3778 | Physical start address of boot monitor code (set by |
| 3779 | make config files to be same as the text base address |
Wolfgang Denk | 0708bc6 | 2010-10-07 21:51:12 +0200 | [diff] [blame] | 3780 | (CONFIG_SYS_TEXT_BASE) used when linking) - same as |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3781 | CONFIG_SYS_FLASH_BASE when booting from flash. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3782 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3783 | - CONFIG_SYS_MONITOR_LEN: |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 3784 | Size of memory reserved for monitor code, used to |
| 3785 | determine _at_compile_time_ (!) if the environment is |
| 3786 | embedded within the U-Boot image, or in a separate |
| 3787 | flash sector. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3788 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3789 | - CONFIG_SYS_MALLOC_LEN: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3790 | Size of DRAM reserved for malloc() use. |
| 3791 | |
Simon Glass | 863e404 | 2014-07-10 22:23:28 -0600 | [diff] [blame] | 3792 | - CONFIG_SYS_MALLOC_F_LEN |
| 3793 | Size of the malloc() pool for use before relocation. If |
| 3794 | this is defined, then a very simple malloc() implementation |
| 3795 | will become available before relocation. The address is just |
| 3796 | below the global data, and the stack is moved down to make |
| 3797 | space. |
| 3798 | |
| 3799 | This feature allocates regions with increasing addresses |
| 3800 | within the region. calloc() is supported, but realloc() |
| 3801 | is not available. free() is supported but does nothing. |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 3802 | The memory will be freed (or in fact just forgotten) when |
Simon Glass | 863e404 | 2014-07-10 22:23:28 -0600 | [diff] [blame] | 3803 | U-Boot relocates itself. |
| 3804 | |
Simon Glass | 9fa901b | 2014-11-10 17:16:54 -0700 | [diff] [blame] | 3805 | - CONFIG_SYS_MALLOC_SIMPLE |
| 3806 | Provides a simple and small malloc() and calloc() for those |
| 3807 | boards which do not use the full malloc in SPL (which is |
| 3808 | enabled with CONFIG_SYS_SPL_MALLOC_START). |
| 3809 | |
Thierry Reding | c97d974 | 2014-12-09 22:25:22 -0700 | [diff] [blame] | 3810 | - CONFIG_SYS_NONCACHED_MEMORY: |
| 3811 | Size of non-cached memory area. This area of memory will be |
| 3812 | typically located right below the malloc() area and mapped |
| 3813 | uncached in the MMU. This is useful for drivers that would |
| 3814 | otherwise require a lot of explicit cache maintenance. For |
| 3815 | some drivers it's also impossible to properly maintain the |
| 3816 | cache. For example if the regions that need to be flushed |
| 3817 | are not a multiple of the cache-line size, *and* padding |
| 3818 | cannot be allocated between the regions to align them (i.e. |
| 3819 | if the HW requires a contiguous array of regions, and the |
| 3820 | size of each region is not cache-aligned), then a flush of |
| 3821 | one region may result in overwriting data that hardware has |
| 3822 | written to another region in the same cache-line. This can |
| 3823 | happen for example in network drivers where descriptors for |
| 3824 | buffers are typically smaller than the CPU cache-line (e.g. |
| 3825 | 16 bytes vs. 32 or 64 bytes). |
| 3826 | |
| 3827 | Non-cached memory is only supported on 32-bit ARM at present. |
| 3828 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3829 | - CONFIG_SYS_BOOTM_LEN: |
Stefan Roese | 5d5ce29 | 2006-03-13 11:16:36 +0100 | [diff] [blame] | 3830 | Normally compressed uImages are limited to an |
| 3831 | uncompressed size of 8 MBytes. If this is not enough, |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3832 | you can define CONFIG_SYS_BOOTM_LEN in your board config file |
Stefan Roese | 5d5ce29 | 2006-03-13 11:16:36 +0100 | [diff] [blame] | 3833 | to adjust this setting to your needs. |
| 3834 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3835 | - CONFIG_SYS_BOOTMAPSZ: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3836 | Maximum size of memory mapped by the startup code of |
| 3837 | the Linux kernel; all data that must be processed by |
Bartlomiej Sieka | c5648c8 | 2008-04-14 15:44:16 +0200 | [diff] [blame] | 3838 | the Linux kernel (bd_info, boot arguments, FDT blob if |
| 3839 | used) must be put below this limit, unless "bootm_low" |
Robert P. J. Day | 832d36e | 2013-09-16 07:15:45 -0400 | [diff] [blame] | 3840 | environment variable is defined and non-zero. In such case |
Bartlomiej Sieka | c5648c8 | 2008-04-14 15:44:16 +0200 | [diff] [blame] | 3841 | all data for the Linux kernel must be between "bootm_low" |
Wolfgang Denk | 092ae95 | 2011-10-26 10:21:21 +0000 | [diff] [blame] | 3842 | and "bootm_low" + CONFIG_SYS_BOOTMAPSZ. The environment |
Grant Likely | 2639638 | 2011-03-28 09:58:43 +0000 | [diff] [blame] | 3843 | variable "bootm_mapsize" will override the value of |
| 3844 | CONFIG_SYS_BOOTMAPSZ. If CONFIG_SYS_BOOTMAPSZ is undefined, |
| 3845 | then the value in "bootm_size" will be used instead. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3846 | |
John Rigby | eea8e69 | 2010-10-13 13:57:35 -0600 | [diff] [blame] | 3847 | - CONFIG_SYS_BOOT_RAMDISK_HIGH: |
| 3848 | Enable initrd_high functionality. If defined then the |
| 3849 | initrd_high feature is enabled and the bootm ramdisk subcommand |
| 3850 | is enabled. |
| 3851 | |
| 3852 | - CONFIG_SYS_BOOT_GET_CMDLINE: |
| 3853 | Enables allocating and saving kernel cmdline in space between |
| 3854 | "bootm_low" and "bootm_low" + BOOTMAPSZ. |
| 3855 | |
| 3856 | - CONFIG_SYS_BOOT_GET_KBD: |
| 3857 | Enables allocating and saving a kernel copy of the bd_info in |
| 3858 | space between "bootm_low" and "bootm_low" + BOOTMAPSZ. |
| 3859 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3860 | - CONFIG_SYS_MAX_FLASH_BANKS: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3861 | Max number of Flash memory banks |
| 3862 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3863 | - CONFIG_SYS_MAX_FLASH_SECT: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3864 | Max number of sectors on a Flash chip |
| 3865 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3866 | - CONFIG_SYS_FLASH_ERASE_TOUT: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3867 | Timeout for Flash erase operations (in ms) |
| 3868 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3869 | - CONFIG_SYS_FLASH_WRITE_TOUT: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3870 | Timeout for Flash write operations (in ms) |
| 3871 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3872 | - CONFIG_SYS_FLASH_LOCK_TOUT |
wdenk | dccbda0 | 2003-07-14 22:13:32 +0000 | [diff] [blame] | 3873 | Timeout for Flash set sector lock bit operation (in ms) |
| 3874 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3875 | - CONFIG_SYS_FLASH_UNLOCK_TOUT |
wdenk | dccbda0 | 2003-07-14 22:13:32 +0000 | [diff] [blame] | 3876 | Timeout for Flash clear lock bits operation (in ms) |
| 3877 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3878 | - CONFIG_SYS_FLASH_PROTECTION |
wdenk | dccbda0 | 2003-07-14 22:13:32 +0000 | [diff] [blame] | 3879 | If defined, hardware flash sectors protection is used |
| 3880 | instead of U-Boot software protection. |
| 3881 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3882 | - CONFIG_SYS_DIRECT_FLASH_TFTP: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3883 | |
| 3884 | Enable TFTP transfers directly to flash memory; |
| 3885 | without this option such a download has to be |
| 3886 | performed in two steps: (1) download to RAM, and (2) |
| 3887 | copy from RAM to flash. |
| 3888 | |
| 3889 | The two-step approach is usually more reliable, since |
| 3890 | you can check if the download worked before you erase |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 3891 | the flash, but in some situations (when system RAM is |
| 3892 | too limited to allow for a temporary copy of the |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3893 | downloaded image) this option may be very useful. |
| 3894 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3895 | - CONFIG_SYS_FLASH_CFI: |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 3896 | Define if the flash driver uses extra elements in the |
wdenk | 2cefd15 | 2004-02-08 22:55:38 +0000 | [diff] [blame] | 3897 | common flash structure for storing flash geometry. |
| 3898 | |
Jean-Christophe PLAGNIOL-VILLARD | 8d94c23 | 2008-08-13 01:40:42 +0200 | [diff] [blame] | 3899 | - CONFIG_FLASH_CFI_DRIVER |
wdenk | 2cefd15 | 2004-02-08 22:55:38 +0000 | [diff] [blame] | 3900 | This option also enables the building of the cfi_flash driver |
| 3901 | in the drivers directory |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 3902 | |
Piotr Ziecik | 3e939e9 | 2008-11-17 15:57:58 +0100 | [diff] [blame] | 3903 | - CONFIG_FLASH_CFI_MTD |
| 3904 | This option enables the building of the cfi_mtd driver |
| 3905 | in the drivers directory. The driver exports CFI flash |
| 3906 | to the MTD layer. |
| 3907 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3908 | - CONFIG_SYS_FLASH_USE_BUFFER_WRITE |
Guennadi Liakhovetski | 183284f | 2008-04-03 13:36:02 +0200 | [diff] [blame] | 3909 | Use buffered writes to flash. |
| 3910 | |
| 3911 | - CONFIG_FLASH_SPANSION_S29WS_N |
| 3912 | s29ws-n MirrorBit flash has non-standard addresses for buffered |
| 3913 | write commands. |
| 3914 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3915 | - CONFIG_SYS_FLASH_QUIET_TEST |
Stefan Roese | c443fe9 | 2005-11-22 13:20:42 +0100 | [diff] [blame] | 3916 | If this option is defined, the common CFI flash doesn't |
| 3917 | print it's warning upon not recognized FLASH banks. This |
| 3918 | is useful, if some of the configured banks are only |
| 3919 | optionally available. |
| 3920 | |
Jerry Van Baren | aae7357 | 2008-03-08 13:48:01 -0500 | [diff] [blame] | 3921 | - CONFIG_FLASH_SHOW_PROGRESS |
| 3922 | If defined (must be an integer), print out countdown |
| 3923 | digits and dots. Recommended value: 45 (9..1) for 80 |
| 3924 | column displays, 15 (3..1) for 40 column displays. |
| 3925 | |
Stefan Roese | d20cba5 | 2013-04-04 15:53:14 +0200 | [diff] [blame] | 3926 | - CONFIG_FLASH_VERIFY |
| 3927 | If defined, the content of the flash (destination) is compared |
| 3928 | against the source after the write operation. An error message |
| 3929 | will be printed when the contents are not identical. |
| 3930 | Please note that this option is useless in nearly all cases, |
| 3931 | since such flash programming errors usually are detected earlier |
| 3932 | while unprotecting/erasing/programming. Please only enable |
| 3933 | this option if you really know what you are doing. |
| 3934 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 3935 | - CONFIG_SYS_RX_ETH_BUFFER: |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 3936 | Defines the number of Ethernet receive buffers. On some |
| 3937 | Ethernet controllers it is recommended to set this value |
stroese | 94ef1cf | 2003-06-05 15:39:44 +0000 | [diff] [blame] | 3938 | to 8 or even higher (EEPRO100 or 405 EMAC), since all |
| 3939 | buffers can be full shortly after enabling the interface |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 3940 | on high Ethernet traffic. |
stroese | 94ef1cf | 2003-06-05 15:39:44 +0000 | [diff] [blame] | 3941 | Defaults to 4 if not defined. |
| 3942 | |
Wolfgang Denk | 460a9ff | 2010-06-20 23:33:59 +0200 | [diff] [blame] | 3943 | - CONFIG_ENV_MAX_ENTRIES |
| 3944 | |
Wolfgang Denk | 1136f69 | 2010-10-27 22:48:30 +0200 | [diff] [blame] | 3945 | Maximum number of entries in the hash table that is used |
| 3946 | internally to store the environment settings. The default |
| 3947 | setting is supposed to be generous and should work in most |
| 3948 | cases. This setting can be used to tune behaviour; see |
| 3949 | lib/hashtable.c for details. |
Wolfgang Denk | 460a9ff | 2010-06-20 23:33:59 +0200 | [diff] [blame] | 3950 | |
Joe Hershberger | 71497d0 | 2012-12-11 22:16:31 -0600 | [diff] [blame] | 3951 | - CONFIG_ENV_FLAGS_LIST_DEFAULT |
| 3952 | - CONFIG_ENV_FLAGS_LIST_STATIC |
Robert P. J. Day | 832d36e | 2013-09-16 07:15:45 -0400 | [diff] [blame] | 3953 | Enable validation of the values given to environment variables when |
Joe Hershberger | 71497d0 | 2012-12-11 22:16:31 -0600 | [diff] [blame] | 3954 | calling env set. Variables can be restricted to only decimal, |
| 3955 | hexadecimal, or boolean. If CONFIG_CMD_NET is also defined, |
| 3956 | the variables can also be restricted to IP address or MAC address. |
| 3957 | |
| 3958 | The format of the list is: |
| 3959 | type_attribute = [s|d|x|b|i|m] |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 3960 | access_attribute = [a|r|o|c] |
| 3961 | attributes = type_attribute[access_attribute] |
Joe Hershberger | 71497d0 | 2012-12-11 22:16:31 -0600 | [diff] [blame] | 3962 | entry = variable_name[:attributes] |
| 3963 | list = entry[,list] |
| 3964 | |
| 3965 | The type attributes are: |
| 3966 | s - String (default) |
| 3967 | d - Decimal |
| 3968 | x - Hexadecimal |
| 3969 | b - Boolean ([1yYtT|0nNfF]) |
| 3970 | i - IP address |
| 3971 | m - MAC address |
| 3972 | |
Joe Hershberger | 6fe26c9 | 2012-12-11 22:16:34 -0600 | [diff] [blame] | 3973 | The access attributes are: |
| 3974 | a - Any (default) |
| 3975 | r - Read-only |
| 3976 | o - Write-once |
| 3977 | c - Change-default |
| 3978 | |
Joe Hershberger | 71497d0 | 2012-12-11 22:16:31 -0600 | [diff] [blame] | 3979 | - CONFIG_ENV_FLAGS_LIST_DEFAULT |
| 3980 | Define this to a list (string) to define the ".flags" |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 3981 | environment variable in the default or embedded environment. |
Joe Hershberger | 71497d0 | 2012-12-11 22:16:31 -0600 | [diff] [blame] | 3982 | |
| 3983 | - CONFIG_ENV_FLAGS_LIST_STATIC |
| 3984 | Define this to a list (string) to define validation that |
| 3985 | should be done if an entry is not found in the ".flags" |
| 3986 | environment variable. To override a setting in the static |
| 3987 | list, simply add an entry for the same variable name to the |
| 3988 | ".flags" variable. |
| 3989 | |
Joe Hershberger | 6db9fd4 | 2015-05-20 14:27:20 -0500 | [diff] [blame] | 3990 | If CONFIG_REGEX is defined, the variable_name above is evaluated as a |
| 3991 | regular expression. This allows multiple variables to define the same |
| 3992 | flags without explicitly listing them for each variable. |
| 3993 | |
Joe Hershberger | 6fe26c9 | 2012-12-11 22:16:34 -0600 | [diff] [blame] | 3994 | - CONFIG_ENV_ACCESS_IGNORE_FORCE |
| 3995 | If defined, don't allow the -f switch to env set override variable |
| 3996 | access flags. |
| 3997 | |
Lokesh Vutla | 100c2d8 | 2013-04-17 20:49:40 +0000 | [diff] [blame] | 3998 | - CONFIG_OMAP_PLATFORM_RESET_TIME_MAX_USEC (OMAP only) |
| 3999 | This is set by OMAP boards for the max time that reset should |
| 4000 | be asserted. See doc/README.omap-reset-time for details on how |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 4001 | the value can be calculated on a given board. |
Simon Glass | 9c9f44a | 2013-03-11 07:06:48 +0000 | [diff] [blame] | 4002 | |
Gabe Black | 3687fe4 | 2014-10-15 04:38:30 -0600 | [diff] [blame] | 4003 | - CONFIG_USE_STDINT |
| 4004 | If stdint.h is available with your toolchain you can define this |
| 4005 | option to enable it. You can provide option 'USE_STDINT=1' when |
| 4006 | building U-Boot to enable this. |
| 4007 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4008 | The following definitions that deal with the placement and management |
| 4009 | of environment data (variable area); in general, we support the |
| 4010 | following configurations: |
| 4011 | |
Mike Frysinger | 63b8f12 | 2011-07-08 10:44:25 +0000 | [diff] [blame] | 4012 | - CONFIG_BUILD_ENVCRC: |
| 4013 | |
| 4014 | Builds up envcrc with the target environment so that external utils |
| 4015 | may easily extract it and embed it in final U-Boot images. |
| 4016 | |
Jean-Christophe PLAGNIOL-VILLARD | 53db4cd | 2008-09-10 22:48:04 +0200 | [diff] [blame] | 4017 | - CONFIG_ENV_IS_IN_FLASH: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4018 | |
| 4019 | Define this if the environment is in flash memory. |
| 4020 | |
| 4021 | a) The environment occupies one whole flash sector, which is |
| 4022 | "embedded" in the text segment with the U-Boot code. This |
| 4023 | happens usually with "bottom boot sector" or "top boot |
| 4024 | sector" type flash chips, which have several smaller |
| 4025 | sectors at the start or the end. For instance, such a |
| 4026 | layout can have sector sizes of 8, 2x4, 16, Nx32 kB. In |
| 4027 | such a case you would place the environment in one of the |
| 4028 | 4 kB sectors - with U-Boot code before and after it. With |
| 4029 | "top boot sector" type flash chips, you would put the |
| 4030 | environment in one of the last sectors, leaving a gap |
| 4031 | between U-Boot and the environment. |
| 4032 | |
Jean-Christophe PLAGNIOL-VILLARD | 7e1cda6 | 2008-09-10 22:48:06 +0200 | [diff] [blame] | 4033 | - CONFIG_ENV_OFFSET: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4034 | |
| 4035 | Offset of environment data (variable area) to the |
| 4036 | beginning of flash memory; for instance, with bottom boot |
| 4037 | type flash chips the second sector can be used: the offset |
| 4038 | for this sector is given here. |
| 4039 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4040 | CONFIG_ENV_OFFSET is used relative to CONFIG_SYS_FLASH_BASE. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4041 | |
Jean-Christophe PLAGNIOL-VILLARD | 7e1cda6 | 2008-09-10 22:48:06 +0200 | [diff] [blame] | 4042 | - CONFIG_ENV_ADDR: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4043 | |
| 4044 | This is just another way to specify the start address of |
| 4045 | the flash sector containing the environment (instead of |
Jean-Christophe PLAGNIOL-VILLARD | 7e1cda6 | 2008-09-10 22:48:06 +0200 | [diff] [blame] | 4046 | CONFIG_ENV_OFFSET). |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4047 | |
Jean-Christophe PLAGNIOL-VILLARD | 7e1cda6 | 2008-09-10 22:48:06 +0200 | [diff] [blame] | 4048 | - CONFIG_ENV_SECT_SIZE: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4049 | |
| 4050 | Size of the sector containing the environment. |
| 4051 | |
| 4052 | |
| 4053 | b) Sometimes flash chips have few, equal sized, BIG sectors. |
| 4054 | In such a case you don't want to spend a whole sector for |
| 4055 | the environment. |
| 4056 | |
Jean-Christophe PLAGNIOL-VILLARD | 7e1cda6 | 2008-09-10 22:48:06 +0200 | [diff] [blame] | 4057 | - CONFIG_ENV_SIZE: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4058 | |
Jean-Christophe PLAGNIOL-VILLARD | 53db4cd | 2008-09-10 22:48:04 +0200 | [diff] [blame] | 4059 | If you use this in combination with CONFIG_ENV_IS_IN_FLASH |
Jean-Christophe PLAGNIOL-VILLARD | 7e1cda6 | 2008-09-10 22:48:06 +0200 | [diff] [blame] | 4060 | and CONFIG_ENV_SECT_SIZE, you can specify to use only a part |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4061 | of this flash sector for the environment. This saves |
| 4062 | memory for the RAM copy of the environment. |
| 4063 | |
| 4064 | It may also save flash memory if you decide to use this |
| 4065 | when your environment is "embedded" within U-Boot code, |
| 4066 | since then the remainder of the flash sector could be used |
| 4067 | for U-Boot code. It should be pointed out that this is |
| 4068 | STRONGLY DISCOURAGED from a robustness point of view: |
| 4069 | updating the environment in flash makes it always |
| 4070 | necessary to erase the WHOLE sector. If something goes |
| 4071 | wrong before the contents has been restored from a copy in |
| 4072 | RAM, your target system will be dead. |
| 4073 | |
Jean-Christophe PLAGNIOL-VILLARD | 7e1cda6 | 2008-09-10 22:48:06 +0200 | [diff] [blame] | 4074 | - CONFIG_ENV_ADDR_REDUND |
| 4075 | CONFIG_ENV_SIZE_REDUND |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4076 | |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 4077 | These settings describe a second storage area used to hold |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 4078 | a redundant copy of the environment data, so that there is |
wdenk | b02744a | 2003-04-05 00:53:31 +0000 | [diff] [blame] | 4079 | a valid backup copy in case there is a power failure during |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 4080 | a "saveenv" operation. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4081 | |
| 4082 | BE CAREFUL! Any changes to the flash layout, and some changes to the |
| 4083 | source code will make it necessary to adapt <board>/u-boot.lds* |
| 4084 | accordingly! |
| 4085 | |
| 4086 | |
Jean-Christophe PLAGNIOL-VILLARD | fdb79c3 | 2008-09-10 22:47:59 +0200 | [diff] [blame] | 4087 | - CONFIG_ENV_IS_IN_NVRAM: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4088 | |
| 4089 | Define this if you have some non-volatile memory device |
| 4090 | (NVRAM, battery buffered SRAM) which you want to use for the |
| 4091 | environment. |
| 4092 | |
Jean-Christophe PLAGNIOL-VILLARD | 7e1cda6 | 2008-09-10 22:48:06 +0200 | [diff] [blame] | 4093 | - CONFIG_ENV_ADDR: |
| 4094 | - CONFIG_ENV_SIZE: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4095 | |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 4096 | These two #defines are used to determine the memory area you |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4097 | want to use for environment. It is assumed that this memory |
| 4098 | can just be read and written to, without any special |
| 4099 | provision. |
| 4100 | |
| 4101 | BE CAREFUL! The first access to the environment happens quite early |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 4102 | in U-Boot initialization (when we try to get the setting of for the |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 4103 | console baudrate). You *MUST* have mapped your NVRAM area then, or |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4104 | U-Boot will hang. |
| 4105 | |
| 4106 | Please note that even with NVRAM we still use a copy of the |
| 4107 | environment in RAM: we could work on NVRAM directly, but we want to |
| 4108 | keep settings there always unmodified except somebody uses "saveenv" |
| 4109 | to save the current settings. |
| 4110 | |
| 4111 | |
Jean-Christophe PLAGNIOL-VILLARD | e46af64 | 2008-09-05 09:19:30 +0200 | [diff] [blame] | 4112 | - CONFIG_ENV_IS_IN_EEPROM: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4113 | |
| 4114 | Use this if you have an EEPROM or similar serial access |
| 4115 | device and a driver for it. |
| 4116 | |
Jean-Christophe PLAGNIOL-VILLARD | 7e1cda6 | 2008-09-10 22:48:06 +0200 | [diff] [blame] | 4117 | - CONFIG_ENV_OFFSET: |
| 4118 | - CONFIG_ENV_SIZE: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4119 | |
| 4120 | These two #defines specify the offset and size of the |
| 4121 | environment area within the total memory of your EEPROM. |
| 4122 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4123 | - CONFIG_SYS_I2C_EEPROM_ADDR: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4124 | If defined, specified the chip address of the EEPROM device. |
| 4125 | The default address is zero. |
| 4126 | |
Christian Gmeiner | 4c5b754 | 2015-02-11 15:19:31 +0100 | [diff] [blame] | 4127 | - CONFIG_SYS_I2C_EEPROM_BUS: |
| 4128 | If defined, specified the i2c bus of the EEPROM device. |
| 4129 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4130 | - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4131 | If defined, the number of bits used to address bytes in a |
| 4132 | single page in the EEPROM device. A 64 byte page, for example |
| 4133 | would require six bits. |
| 4134 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4135 | - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4136 | If defined, the number of milliseconds to delay between |
wdenk | 544e973 | 2004-02-06 23:19:44 +0000 | [diff] [blame] | 4137 | page writes. The default is zero milliseconds. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4138 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4139 | - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4140 | The length in bytes of the EEPROM memory array address. Note |
| 4141 | that this is NOT the chip address length! |
| 4142 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4143 | - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: |
wdenk | 20c98a6 | 2004-04-23 20:32:05 +0000 | [diff] [blame] | 4144 | EEPROM chips that implement "address overflow" are ones |
| 4145 | like Catalyst 24WC04/08/16 which has 9/10/11 bits of |
| 4146 | address and the extra bits end up in the "chip address" bit |
| 4147 | slots. This makes a 24WC08 (1Kbyte) chip look like four 256 |
| 4148 | byte chips. |
| 4149 | |
| 4150 | Note that we consider the length of the address field to |
| 4151 | still be one byte because the extra address bits are hidden |
| 4152 | in the chip address. |
| 4153 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4154 | - CONFIG_SYS_EEPROM_SIZE: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4155 | The size in bytes of the EEPROM device. |
| 4156 | |
Heiko Schocher | 9bb0dd5 | 2010-01-07 08:55:40 +0100 | [diff] [blame] | 4157 | - CONFIG_ENV_EEPROM_IS_ON_I2C |
| 4158 | define this, if you have I2C and SPI activated, and your |
| 4159 | EEPROM, which holds the environment, is on the I2C bus. |
| 4160 | |
| 4161 | - CONFIG_I2C_ENV_EEPROM_BUS |
| 4162 | if you have an Environment on an EEPROM reached over |
| 4163 | I2C muxes, you can define here, how to reach this |
| 4164 | EEPROM. For example: |
| 4165 | |
Heiko Schocher | 479a4cf | 2013-01-29 08:53:15 +0100 | [diff] [blame] | 4166 | #define CONFIG_I2C_ENV_EEPROM_BUS 1 |
Heiko Schocher | 9bb0dd5 | 2010-01-07 08:55:40 +0100 | [diff] [blame] | 4167 | |
| 4168 | EEPROM which holds the environment, is reached over |
| 4169 | a pca9547 i2c mux with address 0x70, channel 3. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4170 | |
Jean-Christophe PLAGNIOL-VILLARD | 2b14d2b | 2008-09-10 22:47:58 +0200 | [diff] [blame] | 4171 | - CONFIG_ENV_IS_IN_DATAFLASH: |
wdenk | 8676590 | 2003-12-06 23:55:10 +0000 | [diff] [blame] | 4172 | |
wdenk | 1ebf41e | 2004-01-02 14:00:00 +0000 | [diff] [blame] | 4173 | Define this if you have a DataFlash memory device which you |
wdenk | 8676590 | 2003-12-06 23:55:10 +0000 | [diff] [blame] | 4174 | want to use for the environment. |
| 4175 | |
Jean-Christophe PLAGNIOL-VILLARD | 7e1cda6 | 2008-09-10 22:48:06 +0200 | [diff] [blame] | 4176 | - CONFIG_ENV_OFFSET: |
| 4177 | - CONFIG_ENV_ADDR: |
| 4178 | - CONFIG_ENV_SIZE: |
wdenk | 8676590 | 2003-12-06 23:55:10 +0000 | [diff] [blame] | 4179 | |
| 4180 | These three #defines specify the offset and size of the |
| 4181 | environment area within the total memory of your DataFlash placed |
| 4182 | at the specified address. |
| 4183 | |
Wu, Josh | 76db7bf | 2014-07-01 19:30:13 +0800 | [diff] [blame] | 4184 | - CONFIG_ENV_IS_IN_SPI_FLASH: |
| 4185 | |
| 4186 | Define this if you have a SPI Flash memory device which you |
| 4187 | want to use for the environment. |
| 4188 | |
| 4189 | - CONFIG_ENV_OFFSET: |
| 4190 | - CONFIG_ENV_SIZE: |
| 4191 | |
| 4192 | These two #defines specify the offset and size of the |
| 4193 | environment area within the SPI Flash. CONFIG_ENV_OFFSET must be |
| 4194 | aligned to an erase sector boundary. |
| 4195 | |
| 4196 | - CONFIG_ENV_SECT_SIZE: |
| 4197 | |
| 4198 | Define the SPI flash's sector size. |
| 4199 | |
| 4200 | - CONFIG_ENV_OFFSET_REDUND (optional): |
| 4201 | |
| 4202 | This setting describes a second storage area of CONFIG_ENV_SIZE |
| 4203 | size used to hold a redundant copy of the environment data, so |
| 4204 | that there is a valid backup copy in case there is a power failure |
| 4205 | during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be |
| 4206 | aligned to an erase sector boundary. |
| 4207 | |
| 4208 | - CONFIG_ENV_SPI_BUS (optional): |
| 4209 | - CONFIG_ENV_SPI_CS (optional): |
| 4210 | |
| 4211 | Define the SPI bus and chip select. If not defined they will be 0. |
| 4212 | |
| 4213 | - CONFIG_ENV_SPI_MAX_HZ (optional): |
| 4214 | |
| 4215 | Define the SPI max work clock. If not defined then use 1MHz. |
| 4216 | |
| 4217 | - CONFIG_ENV_SPI_MODE (optional): |
| 4218 | |
| 4219 | Define the SPI work mode. If not defined then use SPI_MODE_3. |
| 4220 | |
Liu Gang | 85bcd73 | 2012-03-08 00:33:20 +0000 | [diff] [blame] | 4221 | - CONFIG_ENV_IS_IN_REMOTE: |
| 4222 | |
| 4223 | Define this if you have a remote memory space which you |
| 4224 | want to use for the local device's environment. |
| 4225 | |
| 4226 | - CONFIG_ENV_ADDR: |
| 4227 | - CONFIG_ENV_SIZE: |
| 4228 | |
| 4229 | These two #defines specify the address and size of the |
| 4230 | environment area within the remote memory space. The |
| 4231 | local device can get the environment from remote memory |
Liu Gang | 357bf5a | 2012-08-09 05:10:01 +0000 | [diff] [blame] | 4232 | space by SRIO or PCIE links. |
Liu Gang | 85bcd73 | 2012-03-08 00:33:20 +0000 | [diff] [blame] | 4233 | |
| 4234 | BE CAREFUL! For some special cases, the local device can not use |
| 4235 | "saveenv" command. For example, the local device will get the |
Liu Gang | 357bf5a | 2012-08-09 05:10:01 +0000 | [diff] [blame] | 4236 | environment stored in a remote NOR flash by SRIO or PCIE link, |
| 4237 | but it can not erase, write this NOR flash by SRIO or PCIE interface. |
Liu Gang | 85bcd73 | 2012-03-08 00:33:20 +0000 | [diff] [blame] | 4238 | |
Jean-Christophe PLAGNIOL-VILLARD | dda84dd | 2008-09-10 22:47:58 +0200 | [diff] [blame] | 4239 | - CONFIG_ENV_IS_IN_NAND: |
wdenk | 79b5937 | 2004-06-09 14:58:14 +0000 | [diff] [blame] | 4240 | |
| 4241 | Define this if you have a NAND device which you want to use |
| 4242 | for the environment. |
| 4243 | |
Jean-Christophe PLAGNIOL-VILLARD | 7e1cda6 | 2008-09-10 22:48:06 +0200 | [diff] [blame] | 4244 | - CONFIG_ENV_OFFSET: |
| 4245 | - CONFIG_ENV_SIZE: |
wdenk | 79b5937 | 2004-06-09 14:58:14 +0000 | [diff] [blame] | 4246 | |
| 4247 | These two #defines specify the offset and size of the environment |
Scott Wood | 0823932 | 2010-09-17 14:38:37 -0500 | [diff] [blame] | 4248 | area within the first NAND device. CONFIG_ENV_OFFSET must be |
| 4249 | aligned to an erase block boundary. |
wdenk | 8676590 | 2003-12-06 23:55:10 +0000 | [diff] [blame] | 4250 | |
Scott Wood | 0823932 | 2010-09-17 14:38:37 -0500 | [diff] [blame] | 4251 | - CONFIG_ENV_OFFSET_REDUND (optional): |
Markus Klotzbuecher | 5d113e0 | 2006-03-20 18:02:44 +0100 | [diff] [blame] | 4252 | |
Jean-Christophe PLAGNIOL-VILLARD | 7e1cda6 | 2008-09-10 22:48:06 +0200 | [diff] [blame] | 4253 | This setting describes a second storage area of CONFIG_ENV_SIZE |
Scott Wood | 0823932 | 2010-09-17 14:38:37 -0500 | [diff] [blame] | 4254 | size used to hold a redundant copy of the environment data, so |
| 4255 | that there is a valid backup copy in case there is a power failure |
Wolfgang Denk | 092ae95 | 2011-10-26 10:21:21 +0000 | [diff] [blame] | 4256 | during a "saveenv" operation. CONFIG_ENV_OFFSET_RENDUND must be |
Scott Wood | 0823932 | 2010-09-17 14:38:37 -0500 | [diff] [blame] | 4257 | aligned to an erase block boundary. |
| 4258 | |
| 4259 | - CONFIG_ENV_RANGE (optional): |
| 4260 | |
| 4261 | Specifies the length of the region in which the environment |
| 4262 | can be written. This should be a multiple of the NAND device's |
| 4263 | block size. Specifying a range with more erase blocks than |
| 4264 | are needed to hold CONFIG_ENV_SIZE allows bad blocks within |
| 4265 | the range to be avoided. |
| 4266 | |
| 4267 | - CONFIG_ENV_OFFSET_OOB (optional): |
Markus Klotzbuecher | 5d113e0 | 2006-03-20 18:02:44 +0100 | [diff] [blame] | 4268 | |
Scott Wood | 0823932 | 2010-09-17 14:38:37 -0500 | [diff] [blame] | 4269 | Enables support for dynamically retrieving the offset of the |
| 4270 | environment from block zero's out-of-band data. The |
| 4271 | "nand env.oob" command can be used to record this offset. |
| 4272 | Currently, CONFIG_ENV_OFFSET_REDUND is not supported when |
| 4273 | using CONFIG_ENV_OFFSET_OOB. |
Markus Klotzbuecher | 5d113e0 | 2006-03-20 18:02:44 +0100 | [diff] [blame] | 4274 | |
Guennadi Liakhovetski | fad2444 | 2009-05-18 16:07:22 +0200 | [diff] [blame] | 4275 | - CONFIG_NAND_ENV_DST |
| 4276 | |
| 4277 | Defines address in RAM to which the nand_spl code should copy the |
| 4278 | environment. If redundant environment is used, it will be copied to |
| 4279 | CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE. |
| 4280 | |
Joe Hershberger | 0c5faa8 | 2013-04-08 10:32:51 +0000 | [diff] [blame] | 4281 | - CONFIG_ENV_IS_IN_UBI: |
| 4282 | |
| 4283 | Define this if you have an UBI volume that you want to use for the |
| 4284 | environment. This has the benefit of wear-leveling the environment |
| 4285 | accesses, which is important on NAND. |
| 4286 | |
| 4287 | - CONFIG_ENV_UBI_PART: |
| 4288 | |
| 4289 | Define this to a string that is the mtd partition containing the UBI. |
| 4290 | |
| 4291 | - CONFIG_ENV_UBI_VOLUME: |
| 4292 | |
| 4293 | Define this to the name of the volume that you want to store the |
| 4294 | environment in. |
| 4295 | |
Joe Hershberger | db14e86 | 2013-04-08 10:32:52 +0000 | [diff] [blame] | 4296 | - CONFIG_ENV_UBI_VOLUME_REDUND: |
| 4297 | |
| 4298 | Define this to the name of another volume to store a second copy of |
| 4299 | the environment in. This will enable redundant environments in UBI. |
| 4300 | It is assumed that both volumes are in the same MTD partition. |
| 4301 | |
Joe Hershberger | 0c5faa8 | 2013-04-08 10:32:51 +0000 | [diff] [blame] | 4302 | - CONFIG_UBI_SILENCE_MSG |
| 4303 | - CONFIG_UBIFS_SILENCE_MSG |
| 4304 | |
| 4305 | You will probably want to define these to avoid a really noisy system |
| 4306 | when storing the env in UBI. |
| 4307 | |
Wu, Josh | a7d0c87 | 2014-06-24 17:31:03 +0800 | [diff] [blame] | 4308 | - CONFIG_ENV_IS_IN_FAT: |
| 4309 | Define this if you want to use the FAT file system for the environment. |
| 4310 | |
| 4311 | - FAT_ENV_INTERFACE: |
| 4312 | |
| 4313 | Define this to a string that is the name of the block device. |
| 4314 | |
| 4315 | - FAT_ENV_DEV_AND_PART: |
| 4316 | |
| 4317 | Define this to a string to specify the partition of the device. It can |
| 4318 | be as following: |
| 4319 | |
| 4320 | "D:P", "D:0", "D", "D:" or "D:auto" (D, P are integers. And P >= 1) |
| 4321 | - "D:P": device D partition P. Error occurs if device D has no |
| 4322 | partition table. |
| 4323 | - "D:0": device D. |
| 4324 | - "D" or "D:": device D partition 1 if device D has partition |
| 4325 | table, or the whole device D if has no partition |
| 4326 | table. |
| 4327 | - "D:auto": first partition in device D with bootable flag set. |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 4328 | If none, first valid partition in device D. If no |
Wu, Josh | a7d0c87 | 2014-06-24 17:31:03 +0800 | [diff] [blame] | 4329 | partition table then means device D. |
| 4330 | |
| 4331 | - FAT_ENV_FILE: |
| 4332 | |
| 4333 | It's a string of the FAT file name. This file use to store the |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 4334 | environment. |
Wu, Josh | a7d0c87 | 2014-06-24 17:31:03 +0800 | [diff] [blame] | 4335 | |
| 4336 | - CONFIG_FAT_WRITE: |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 4337 | This should be defined. Otherwise it cannot save the environment file. |
Wu, Josh | a7d0c87 | 2014-06-24 17:31:03 +0800 | [diff] [blame] | 4338 | |
Stephen Warren | eedcacd | 2013-06-11 15:14:00 -0600 | [diff] [blame] | 4339 | - CONFIG_ENV_IS_IN_MMC: |
| 4340 | |
| 4341 | Define this if you have an MMC device which you want to use for the |
| 4342 | environment. |
| 4343 | |
| 4344 | - CONFIG_SYS_MMC_ENV_DEV: |
| 4345 | |
| 4346 | Specifies which MMC device the environment is stored in. |
| 4347 | |
| 4348 | - CONFIG_SYS_MMC_ENV_PART (optional): |
| 4349 | |
| 4350 | Specifies which MMC partition the environment is stored in. If not |
| 4351 | set, defaults to partition 0, the user area. Common values might be |
| 4352 | 1 (first MMC boot partition), 2 (second MMC boot partition). |
| 4353 | |
| 4354 | - CONFIG_ENV_OFFSET: |
| 4355 | - CONFIG_ENV_SIZE: |
| 4356 | |
| 4357 | These two #defines specify the offset and size of the environment |
| 4358 | area within the specified MMC device. |
| 4359 | |
Stephen Warren | 24dc203 | 2013-06-11 15:14:02 -0600 | [diff] [blame] | 4360 | If offset is positive (the usual case), it is treated as relative to |
| 4361 | the start of the MMC partition. If offset is negative, it is treated |
| 4362 | as relative to the end of the MMC partition. This can be useful if |
| 4363 | your board may be fitted with different MMC devices, which have |
| 4364 | different sizes for the MMC partitions, and you always want the |
| 4365 | environment placed at the very end of the partition, to leave the |
| 4366 | maximum possible space before it, to store other data. |
| 4367 | |
Stephen Warren | eedcacd | 2013-06-11 15:14:00 -0600 | [diff] [blame] | 4368 | These two values are in units of bytes, but must be aligned to an |
| 4369 | MMC sector boundary. |
| 4370 | |
| 4371 | - CONFIG_ENV_OFFSET_REDUND (optional): |
| 4372 | |
| 4373 | Specifies a second storage area, of CONFIG_ENV_SIZE size, used to |
| 4374 | hold a redundant copy of the environment data. This provides a |
| 4375 | valid backup copy in case the other copy is corrupted, e.g. due |
| 4376 | to a power failure during a "saveenv" operation. |
| 4377 | |
Stephen Warren | 24dc203 | 2013-06-11 15:14:02 -0600 | [diff] [blame] | 4378 | This value may also be positive or negative; this is handled in the |
| 4379 | same way as CONFIG_ENV_OFFSET. |
| 4380 | |
Stephen Warren | eedcacd | 2013-06-11 15:14:00 -0600 | [diff] [blame] | 4381 | This value is also in units of bytes, but must also be aligned to |
| 4382 | an MMC sector boundary. |
| 4383 | |
| 4384 | - CONFIG_ENV_SIZE_REDUND (optional): |
| 4385 | |
| 4386 | This value need not be set, even when CONFIG_ENV_OFFSET_REDUND is |
| 4387 | set. If this value is set, it must be set to the same value as |
| 4388 | CONFIG_ENV_SIZE. |
| 4389 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4390 | - CONFIG_SYS_SPI_INIT_OFFSET |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4391 | |
| 4392 | Defines offset to the initial SPI buffer area in DPRAM. The |
| 4393 | area is used at an early stage (ROM part) if the environment |
| 4394 | is configured to reside in the SPI EEPROM: We need a 520 byte |
| 4395 | scratch DPRAM area. It is used between the two initialization |
| 4396 | calls (spi_init_f() and spi_init_r()). A value of 0xB00 seems |
| 4397 | to be a good choice since it makes it far enough from the |
| 4398 | start of the data area as well as from the stack pointer. |
| 4399 | |
Bruce Adler | edecc94 | 2007-11-02 13:15:42 -0700 | [diff] [blame] | 4400 | Please note that the environment is read-only until the monitor |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4401 | has been relocated to RAM and a RAM copy of the environment has been |
Wolfgang Denk | 76af278 | 2010-07-24 21:55:43 +0200 | [diff] [blame] | 4402 | created; also, when using EEPROM you will have to use getenv_f() |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4403 | until then to read environment variables. |
| 4404 | |
wdenk | 8dba050 | 2003-03-31 16:34:49 +0000 | [diff] [blame] | 4405 | The environment is protected by a CRC32 checksum. Before the monitor |
| 4406 | is relocated into RAM, as a result of a bad CRC you will be working |
| 4407 | with the compiled-in default environment - *silently*!!! [This is |
| 4408 | necessary, because the first environment variable we need is the |
| 4409 | "baudrate" setting for the console - if we have a bad CRC, we don't |
| 4410 | have any device yet where we could complain.] |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4411 | |
| 4412 | Note: once the monitor has been relocated, then it will complain if |
| 4413 | the default environment is used; a new CRC is computed as soon as you |
wdenk | 8dba050 | 2003-03-31 16:34:49 +0000 | [diff] [blame] | 4414 | use the "saveenv" command to store a valid environment. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4415 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4416 | - CONFIG_SYS_FAULT_ECHO_LINK_DOWN: |
wdenk | 9c53f40 | 2003-10-15 23:53:47 +0000 | [diff] [blame] | 4417 | Echo the inverted Ethernet link state to the fault LED. |
wdenk | 49c3f67 | 2003-10-08 22:33:00 +0000 | [diff] [blame] | 4418 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4419 | Note: If this option is active, then CONFIG_SYS_FAULT_MII_ADDR |
wdenk | 49c3f67 | 2003-10-08 22:33:00 +0000 | [diff] [blame] | 4420 | also needs to be defined. |
| 4421 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4422 | - CONFIG_SYS_FAULT_MII_ADDR: |
wdenk | 9c53f40 | 2003-10-15 23:53:47 +0000 | [diff] [blame] | 4423 | MII address of the PHY to check for the Ethernet link state. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4424 | |
Ron Madrid | dfa028a | 2009-02-18 14:30:44 -0800 | [diff] [blame] | 4425 | - CONFIG_NS16550_MIN_FUNCTIONS: |
| 4426 | Define this if you desire to only have use of the NS16550_init |
| 4427 | and NS16550_putc functions for the serial driver located at |
| 4428 | drivers/serial/ns16550.c. This option is useful for saving |
| 4429 | space for already greatly restricted images, including but not |
| 4430 | limited to NAND_SPL configurations. |
| 4431 | |
Simon Glass | 28a9e33 | 2012-11-30 13:01:18 +0000 | [diff] [blame] | 4432 | - CONFIG_DISPLAY_BOARDINFO |
| 4433 | Display information about the board that U-Boot is running on |
| 4434 | when U-Boot starts up. The board function checkboard() is called |
| 4435 | to do this. |
| 4436 | |
Simon Glass | e882201 | 2012-11-30 13:01:19 +0000 | [diff] [blame] | 4437 | - CONFIG_DISPLAY_BOARDINFO_LATE |
| 4438 | Similar to the previous option, but display this information |
| 4439 | later, once stdio is running and output goes to the LCD, if |
| 4440 | present. |
| 4441 | |
Sascha Silbe | 4b9c17c | 2013-08-11 16:40:43 +0200 | [diff] [blame] | 4442 | - CONFIG_BOARD_SIZE_LIMIT: |
| 4443 | Maximum size of the U-Boot image. When defined, the |
| 4444 | build system checks that the actual size does not |
| 4445 | exceed it. |
| 4446 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4447 | Low Level (hardware related) configuration options: |
wdenk | c8434db | 2003-03-26 06:55:25 +0000 | [diff] [blame] | 4448 | --------------------------------------------------- |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4449 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4450 | - CONFIG_SYS_CACHELINE_SIZE: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4451 | Cache Line Size of the CPU. |
| 4452 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4453 | - CONFIG_SYS_DEFAULT_IMMR: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4454 | Default address of the IMMR after system reset. |
wdenk | 2bb1105 | 2003-07-17 23:16:40 +0000 | [diff] [blame] | 4455 | |
wdenk | 9c53f40 | 2003-10-15 23:53:47 +0000 | [diff] [blame] | 4456 | Needed on some 8260 systems (MPC8260ADS, PQ2FADS-ZU, |
| 4457 | and RPXsuper) to be able to adjust the position of |
| 4458 | the IMMR register after a reset. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4459 | |
Timur Tabi | d8f341c | 2011-08-04 18:03:41 -0500 | [diff] [blame] | 4460 | - CONFIG_SYS_CCSRBAR_DEFAULT: |
| 4461 | Default (power-on reset) physical address of CCSR on Freescale |
| 4462 | PowerPC SOCs. |
| 4463 | |
| 4464 | - CONFIG_SYS_CCSRBAR: |
| 4465 | Virtual address of CCSR. On a 32-bit build, this is typically |
| 4466 | the same value as CONFIG_SYS_CCSRBAR_DEFAULT. |
| 4467 | |
| 4468 | CONFIG_SYS_DEFAULT_IMMR must also be set to this value, |
| 4469 | for cross-platform code that uses that macro instead. |
| 4470 | |
| 4471 | - CONFIG_SYS_CCSRBAR_PHYS: |
| 4472 | Physical address of CCSR. CCSR can be relocated to a new |
| 4473 | physical address, if desired. In this case, this macro should |
Wolfgang Denk | 092ae95 | 2011-10-26 10:21:21 +0000 | [diff] [blame] | 4474 | be set to that address. Otherwise, it should be set to the |
Timur Tabi | d8f341c | 2011-08-04 18:03:41 -0500 | [diff] [blame] | 4475 | same value as CONFIG_SYS_CCSRBAR_DEFAULT. For example, CCSR |
| 4476 | is typically relocated on 36-bit builds. It is recommended |
| 4477 | that this macro be defined via the _HIGH and _LOW macros: |
| 4478 | |
| 4479 | #define CONFIG_SYS_CCSRBAR_PHYS ((CONFIG_SYS_CCSRBAR_PHYS_HIGH |
| 4480 | * 1ull) << 32 | CONFIG_SYS_CCSRBAR_PHYS_LOW) |
| 4481 | |
| 4482 | - CONFIG_SYS_CCSRBAR_PHYS_HIGH: |
Wolfgang Denk | d590fb1 | 2011-10-07 09:58:21 +0200 | [diff] [blame] | 4483 | Bits 33-36 of CONFIG_SYS_CCSRBAR_PHYS. This value is typically |
| 4484 | either 0 (32-bit build) or 0xF (36-bit build). This macro is |
Timur Tabi | d8f341c | 2011-08-04 18:03:41 -0500 | [diff] [blame] | 4485 | used in assembly code, so it must not contain typecasts or |
| 4486 | integer size suffixes (e.g. "ULL"). |
| 4487 | |
| 4488 | - CONFIG_SYS_CCSRBAR_PHYS_LOW: |
| 4489 | Lower 32-bits of CONFIG_SYS_CCSRBAR_PHYS. This macro is |
| 4490 | used in assembly code, so it must not contain typecasts or |
| 4491 | integer size suffixes (e.g. "ULL"). |
| 4492 | |
| 4493 | - CONFIG_SYS_CCSR_DO_NOT_RELOCATE: |
| 4494 | If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be |
| 4495 | forced to a value that ensures that CCSR is not relocated. |
| 4496 | |
wdenk | 1272e23 | 2002-11-10 22:06:23 +0000 | [diff] [blame] | 4497 | - Floppy Disk Support: |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4498 | CONFIG_SYS_FDC_DRIVE_NUMBER |
wdenk | 1272e23 | 2002-11-10 22:06:23 +0000 | [diff] [blame] | 4499 | |
| 4500 | the default drive number (default value 0) |
| 4501 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4502 | CONFIG_SYS_ISA_IO_STRIDE |
wdenk | 1272e23 | 2002-11-10 22:06:23 +0000 | [diff] [blame] | 4503 | |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 4504 | defines the spacing between FDC chipset registers |
wdenk | 1272e23 | 2002-11-10 22:06:23 +0000 | [diff] [blame] | 4505 | (default value 1) |
| 4506 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4507 | CONFIG_SYS_ISA_IO_OFFSET |
wdenk | 1272e23 | 2002-11-10 22:06:23 +0000 | [diff] [blame] | 4508 | |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 4509 | defines the offset of register from address. It |
| 4510 | depends on which part of the data bus is connected to |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 4511 | the FDC chipset. (default value 0) |
wdenk | 1272e23 | 2002-11-10 22:06:23 +0000 | [diff] [blame] | 4512 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4513 | If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and |
| 4514 | CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 4515 | default value. |
wdenk | 1272e23 | 2002-11-10 22:06:23 +0000 | [diff] [blame] | 4516 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4517 | if CONFIG_SYS_FDC_HW_INIT is defined, then the function |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 4518 | fdc_hw_init() is called at the beginning of the FDC |
| 4519 | setup. fdc_hw_init() must be provided by the board |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 4520 | source code. It is used to make hardware-dependent |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 4521 | initializations. |
wdenk | 1272e23 | 2002-11-10 22:06:23 +0000 | [diff] [blame] | 4522 | |
Macpaul Lin | d1e4994 | 2011-04-11 20:45:32 +0000 | [diff] [blame] | 4523 | - CONFIG_IDE_AHB: |
| 4524 | Most IDE controllers were designed to be connected with PCI |
| 4525 | interface. Only few of them were designed for AHB interface. |
| 4526 | When software is doing ATA command and data transfer to |
| 4527 | IDE devices through IDE-AHB controller, some additional |
| 4528 | registers accessing to these kind of IDE-AHB controller |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 4529 | is required. |
Macpaul Lin | d1e4994 | 2011-04-11 20:45:32 +0000 | [diff] [blame] | 4530 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4531 | - CONFIG_SYS_IMMR: Physical address of the Internal Memory. |
wdenk | 07d7e6b | 2004-12-16 21:44:03 +0000 | [diff] [blame] | 4532 | DO NOT CHANGE unless you know exactly what you're |
wdenk | b3a4a70 | 2004-12-10 11:40:40 +0000 | [diff] [blame] | 4533 | doing! (11-4) [MPC8xx/82xx systems only] |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4534 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4535 | - CONFIG_SYS_INIT_RAM_ADDR: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4536 | |
wdenk | eb20ad3 | 2003-09-05 23:19:14 +0000 | [diff] [blame] | 4537 | Start address of memory area that can be used for |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4538 | initial data and stack; please note that this must be |
| 4539 | writable memory that is working WITHOUT special |
| 4540 | initialization, i. e. you CANNOT use normal RAM which |
| 4541 | will become available only after programming the |
| 4542 | memory controller and running certain initialization |
| 4543 | sequences. |
| 4544 | |
| 4545 | U-Boot uses the following memory types: |
| 4546 | - MPC8xx and MPC8260: IMMR (internal memory of the CPU) |
| 4547 | - MPC824X: data cache |
| 4548 | - PPC4xx: data cache |
| 4549 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4550 | - CONFIG_SYS_GBL_DATA_OFFSET: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4551 | |
| 4552 | Offset of the initial data structure in the memory |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4553 | area defined by CONFIG_SYS_INIT_RAM_ADDR. Usually |
| 4554 | CONFIG_SYS_GBL_DATA_OFFSET is chosen such that the initial |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4555 | data is located at the end of the available space |
Wolfgang Denk | 1c2e98e | 2010-10-26 13:32:32 +0200 | [diff] [blame] | 4556 | (sometimes written as (CONFIG_SYS_INIT_RAM_SIZE - |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4557 | CONFIG_SYS_INIT_DATA_SIZE), and the initial stack is just |
| 4558 | below that area (growing from (CONFIG_SYS_INIT_RAM_ADDR + |
| 4559 | CONFIG_SYS_GBL_DATA_OFFSET) downward. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4560 | |
| 4561 | Note: |
| 4562 | On the MPC824X (or other systems that use the data |
| 4563 | cache for initial memory) the address chosen for |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4564 | CONFIG_SYS_INIT_RAM_ADDR is basically arbitrary - it must |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4565 | point to an otherwise UNUSED address space between |
| 4566 | the top of RAM and the start of the PCI space. |
| 4567 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4568 | - CONFIG_SYS_SIUMCR: SIU Module Configuration (11-6) |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4569 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4570 | - CONFIG_SYS_SYPCR: System Protection Control (11-9) |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4571 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4572 | - CONFIG_SYS_TBSCR: Time Base Status and Control (11-26) |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4573 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4574 | - CONFIG_SYS_PISCR: Periodic Interrupt Status and Control (11-31) |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4575 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4576 | - CONFIG_SYS_PLPRCR: PLL, Low-Power, and Reset Control Register (15-30) |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4577 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4578 | - CONFIG_SYS_SCCR: System Clock and reset Control Register (15-27) |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4579 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4580 | - CONFIG_SYS_OR_TIMING_SDRAM: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4581 | SDRAM timing |
| 4582 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4583 | - CONFIG_SYS_MAMR_PTA: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4584 | periodic timer for refresh |
| 4585 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4586 | - CONFIG_SYS_DER: Debug Event Register (37-47) |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4587 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4588 | - FLASH_BASE0_PRELIM, FLASH_BASE1_PRELIM, CONFIG_SYS_REMAP_OR_AM, |
| 4589 | CONFIG_SYS_PRELIM_OR_AM, CONFIG_SYS_OR_TIMING_FLASH, CONFIG_SYS_OR0_REMAP, |
| 4590 | CONFIG_SYS_OR0_PRELIM, CONFIG_SYS_BR0_PRELIM, CONFIG_SYS_OR1_REMAP, CONFIG_SYS_OR1_PRELIM, |
| 4591 | CONFIG_SYS_BR1_PRELIM: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4592 | Memory Controller Definitions: BR0/1 and OR0/1 (FLASH) |
| 4593 | |
| 4594 | - SDRAM_BASE2_PRELIM, SDRAM_BASE3_PRELIM, SDRAM_MAX_SIZE, |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4595 | CONFIG_SYS_OR_TIMING_SDRAM, CONFIG_SYS_OR2_PRELIM, CONFIG_SYS_BR2_PRELIM, |
| 4596 | CONFIG_SYS_OR3_PRELIM, CONFIG_SYS_BR3_PRELIM: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4597 | Memory Controller Definitions: BR2/3 and OR2/3 (SDRAM) |
| 4598 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4599 | - CONFIG_SYS_MAMR_PTA, CONFIG_SYS_MPTPR_2BK_4K, CONFIG_SYS_MPTPR_1BK_4K, CONFIG_SYS_MPTPR_2BK_8K, |
| 4600 | CONFIG_SYS_MPTPR_1BK_8K, CONFIG_SYS_MAMR_8COL, CONFIG_SYS_MAMR_9COL: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4601 | Machine Mode Register and Memory Periodic Timer |
| 4602 | Prescaler definitions (SDRAM timing) |
| 4603 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4604 | - CONFIG_SYS_I2C_UCODE_PATCH, CONFIG_SYS_I2C_DPMEM_OFFSET [0x1FC0]: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4605 | enable I2C microcode relocation patch (MPC8xx); |
| 4606 | define relocation offset in DPRAM [DSP2] |
| 4607 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4608 | - CONFIG_SYS_SMC_UCODE_PATCH, CONFIG_SYS_SMC_DPMEM_OFFSET [0x1FC0]: |
Heiko Schocher | c8148ed | 2008-01-11 01:12:07 +0100 | [diff] [blame] | 4609 | enable SMC microcode relocation patch (MPC8xx); |
| 4610 | define relocation offset in DPRAM [SMC1] |
| 4611 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4612 | - CONFIG_SYS_SPI_UCODE_PATCH, CONFIG_SYS_SPI_DPMEM_OFFSET [0x1FC0]: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4613 | enable SPI microcode relocation patch (MPC8xx); |
| 4614 | define relocation offset in DPRAM [SCC4] |
| 4615 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4616 | - CONFIG_SYS_USE_OSCCLK: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4617 | Use OSCM clock mode on MBX8xx board. Be careful, |
| 4618 | wrong setting might damage your board. Read |
| 4619 | doc/README.MBX before setting this variable! |
| 4620 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4621 | - CONFIG_SYS_CPM_POST_WORD_ADDR: (MPC8xx, MPC8260 only) |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 4622 | Offset of the bootmode word in DPRAM used by post |
| 4623 | (Power On Self Tests). This definition overrides |
| 4624 | #define'd default value in commproc.h resp. |
| 4625 | cpm_8260.h. |
wdenk | 2029f4d | 2002-11-21 23:11:29 +0000 | [diff] [blame] | 4626 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4627 | - CONFIG_SYS_PCI_SLV_MEM_LOCAL, CONFIG_SYS_PCI_SLV_MEM_BUS, CONFIG_SYS_PICMR0_MASK_ATTRIB, |
| 4628 | CONFIG_SYS_PCI_MSTR0_LOCAL, CONFIG_SYS_PCIMSK0_MASK, CONFIG_SYS_PCI_MSTR1_LOCAL, |
| 4629 | CONFIG_SYS_PCIMSK1_MASK, CONFIG_SYS_PCI_MSTR_MEM_LOCAL, CONFIG_SYS_PCI_MSTR_MEM_BUS, |
| 4630 | CONFIG_SYS_CPU_PCI_MEM_START, CONFIG_SYS_PCI_MSTR_MEM_SIZE, CONFIG_SYS_POCMR0_MASK_ATTRIB, |
| 4631 | CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL, CONFIG_SYS_PCI_MSTR_MEMIO_BUS, CPU_PCI_MEMIO_START, |
| 4632 | CONFIG_SYS_PCI_MSTR_MEMIO_SIZE, CONFIG_SYS_POCMR1_MASK_ATTRIB, CONFIG_SYS_PCI_MSTR_IO_LOCAL, |
| 4633 | CONFIG_SYS_PCI_MSTR_IO_BUS, CONFIG_SYS_CPU_PCI_IO_START, CONFIG_SYS_PCI_MSTR_IO_SIZE, |
| 4634 | CONFIG_SYS_POCMR2_MASK_ATTRIB: (MPC826x only) |
Stefan Roese | 88fbf93 | 2010-04-15 16:07:28 +0200 | [diff] [blame] | 4635 | Overrides the default PCI memory map in arch/powerpc/cpu/mpc8260/pci.c if set. |
wdenk | bf2f8c9 | 2003-05-22 22:52:13 +0000 | [diff] [blame] | 4636 | |
Dirk Eibach | 378d1ca | 2009-02-09 08:18:34 +0100 | [diff] [blame] | 4637 | - CONFIG_PCI_DISABLE_PCIE: |
| 4638 | Disable PCI-Express on systems where it is supported but not |
| 4639 | required. |
| 4640 | |
Andrew Sharp | 61d47ca | 2012-08-29 14:16:32 +0000 | [diff] [blame] | 4641 | - CONFIG_PCI_ENUM_ONLY |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 4642 | Only scan through and get the devices on the buses. |
Andrew Sharp | 61d47ca | 2012-08-29 14:16:32 +0000 | [diff] [blame] | 4643 | Don't do any setup work, presumably because someone or |
| 4644 | something has already done it, and we don't need to do it |
| 4645 | a second time. Useful for platforms that are pre-booted |
| 4646 | by coreboot or similar. |
| 4647 | |
Gabor Juhos | b445873 | 2013-05-30 07:06:12 +0000 | [diff] [blame] | 4648 | - CONFIG_PCI_INDIRECT_BRIDGE: |
| 4649 | Enable support for indirect PCI bridges. |
| 4650 | |
Kumar Gala | 8975d7a | 2010-12-30 12:09:53 -0600 | [diff] [blame] | 4651 | - CONFIG_SYS_SRIO: |
| 4652 | Chip has SRIO or not |
| 4653 | |
| 4654 | - CONFIG_SRIO1: |
| 4655 | Board has SRIO 1 port available |
| 4656 | |
| 4657 | - CONFIG_SRIO2: |
| 4658 | Board has SRIO 2 port available |
| 4659 | |
Liu Gang | 27afb9c | 2013-05-07 16:30:46 +0800 | [diff] [blame] | 4660 | - CONFIG_SRIO_PCIE_BOOT_MASTER |
| 4661 | Board can support master function for Boot from SRIO and PCIE |
| 4662 | |
Kumar Gala | 8975d7a | 2010-12-30 12:09:53 -0600 | [diff] [blame] | 4663 | - CONFIG_SYS_SRIOn_MEM_VIRT: |
| 4664 | Virtual Address of SRIO port 'n' memory region |
| 4665 | |
| 4666 | - CONFIG_SYS_SRIOn_MEM_PHYS: |
| 4667 | Physical Address of SRIO port 'n' memory region |
| 4668 | |
| 4669 | - CONFIG_SYS_SRIOn_MEM_SIZE: |
| 4670 | Size of SRIO port 'n' memory region |
| 4671 | |
Fabio Estevam | f17e878 | 2013-04-11 09:35:34 +0000 | [diff] [blame] | 4672 | - CONFIG_SYS_NAND_BUSWIDTH_16BIT |
| 4673 | Defined to tell the NAND controller that the NAND chip is using |
| 4674 | a 16 bit bus. |
| 4675 | Not all NAND drivers use this symbol. |
Fabio Estevam | 417052b | 2013-04-11 09:35:35 +0000 | [diff] [blame] | 4676 | Example of drivers that use it: |
Fabio Estevam | f17e878 | 2013-04-11 09:35:34 +0000 | [diff] [blame] | 4677 | - drivers/mtd/nand/ndfc.c |
Fabio Estevam | 417052b | 2013-04-11 09:35:35 +0000 | [diff] [blame] | 4678 | - drivers/mtd/nand/mxc_nand.c |
Alex Waterman | cd6aae3 | 2011-05-19 15:08:36 -0400 | [diff] [blame] | 4679 | |
| 4680 | - CONFIG_SYS_NDFC_EBC0_CFG |
| 4681 | Sets the EBC0_CFG register for the NDFC. If not defined |
| 4682 | a default value will be used. |
| 4683 | |
Ben Warren | 4565715 | 2006-09-07 16:50:54 -0400 | [diff] [blame] | 4684 | - CONFIG_SPD_EEPROM |
Wolfgang Denk | b240aef | 2008-03-26 10:40:12 +0100 | [diff] [blame] | 4685 | Get DDR timing information from an I2C EEPROM. Common |
| 4686 | with pluggable memory modules such as SODIMMs |
| 4687 | |
Ben Warren | 4565715 | 2006-09-07 16:50:54 -0400 | [diff] [blame] | 4688 | SPD_EEPROM_ADDRESS |
| 4689 | I2C address of the SPD EEPROM |
| 4690 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4691 | - CONFIG_SYS_SPD_BUS_NUM |
Wolfgang Denk | b240aef | 2008-03-26 10:40:12 +0100 | [diff] [blame] | 4692 | If SPD EEPROM is on an I2C bus other than the first |
| 4693 | one, specify here. Note that the value must resolve |
| 4694 | to something your driver can deal with. |
Ben Warren | 4565715 | 2006-09-07 16:50:54 -0400 | [diff] [blame] | 4695 | |
York Sun | e73cc04 | 2011-06-07 09:42:16 +0800 | [diff] [blame] | 4696 | - CONFIG_SYS_DDR_RAW_TIMING |
| 4697 | Get DDR timing information from other than SPD. Common with |
| 4698 | soldered DDR chips onboard without SPD. DDR raw timing |
| 4699 | parameters are extracted from datasheet and hard-coded into |
| 4700 | header files or board specific files. |
| 4701 | |
York Sun | bd495cf | 2011-09-16 13:21:35 -0700 | [diff] [blame] | 4702 | - CONFIG_FSL_DDR_INTERACTIVE |
| 4703 | Enable interactive DDR debugging. See doc/README.fsl-ddr. |
| 4704 | |
York Sun | 8ced050 | 2015-01-06 13:18:55 -0800 | [diff] [blame] | 4705 | - CONFIG_FSL_DDR_SYNC_REFRESH |
| 4706 | Enable sync of refresh for multiple controllers. |
| 4707 | |
York Sun | b6a35f8 | 2015-03-19 09:30:28 -0700 | [diff] [blame] | 4708 | - CONFIG_FSL_DDR_BIST |
| 4709 | Enable built-in memory test for Freescale DDR controllers. |
| 4710 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 4711 | - CONFIG_SYS_83XX_DDR_USES_CS0 |
Wolfgang Denk | b240aef | 2008-03-26 10:40:12 +0100 | [diff] [blame] | 4712 | Only for 83xx systems. If specified, then DDR should |
| 4713 | be configured using CS0 and CS1 instead of CS2 and CS3. |
Timur Tabi | 054838e | 2006-10-31 18:44:42 -0600 | [diff] [blame] | 4714 | |
wdenk | 6203e40 | 2004-04-18 10:13:26 +0000 | [diff] [blame] | 4715 | - CONFIG_ETHER_ON_FEC[12] |
| 4716 | Define to enable FEC[12] on a 8xx series processor. |
| 4717 | |
| 4718 | - CONFIG_FEC[12]_PHY |
| 4719 | Define to the hardcoded PHY address which corresponds |
wdenk | 0593920 | 2004-04-18 17:39:38 +0000 | [diff] [blame] | 4720 | to the given FEC; i. e. |
| 4721 | #define CONFIG_FEC1_PHY 4 |
wdenk | 6203e40 | 2004-04-18 10:13:26 +0000 | [diff] [blame] | 4722 | means that the PHY with address 4 is connected to FEC1 |
| 4723 | |
| 4724 | When set to -1, means to probe for first available. |
| 4725 | |
| 4726 | - CONFIG_FEC[12]_PHY_NORXERR |
| 4727 | The PHY does not have a RXERR line (RMII only). |
| 4728 | (so program the FEC to ignore it). |
| 4729 | |
| 4730 | - CONFIG_RMII |
| 4731 | Enable RMII mode for all FECs. |
| 4732 | Note that this is a global option, we can't |
| 4733 | have one FEC in standard MII mode and another in RMII mode. |
| 4734 | |
wdenk | 20c98a6 | 2004-04-23 20:32:05 +0000 | [diff] [blame] | 4735 | - CONFIG_CRC32_VERIFY |
| 4736 | Add a verify option to the crc32 command. |
| 4737 | The syntax is: |
| 4738 | |
| 4739 | => crc32 -v <address> <count> <crc32> |
| 4740 | |
| 4741 | Where address/count indicate a memory area |
| 4742 | and crc32 is the correct crc32 which the |
| 4743 | area should have. |
| 4744 | |
wdenk | 6451936 | 2004-07-11 17:40:54 +0000 | [diff] [blame] | 4745 | - CONFIG_LOOPW |
| 4746 | Add the "loopw" memory command. This only takes effect if |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 4747 | the memory commands are activated globally (CONFIG_CMD_MEM). |
wdenk | 6451936 | 2004-07-11 17:40:54 +0000 | [diff] [blame] | 4748 | |
stroese | cc3af83 | 2004-12-16 18:46:55 +0000 | [diff] [blame] | 4749 | - CONFIG_MX_CYCLIC |
| 4750 | Add the "mdc" and "mwc" memory commands. These are cyclic |
| 4751 | "md/mw" commands. |
| 4752 | Examples: |
| 4753 | |
wdenk | 07d7e6b | 2004-12-16 21:44:03 +0000 | [diff] [blame] | 4754 | => mdc.b 10 4 500 |
stroese | cc3af83 | 2004-12-16 18:46:55 +0000 | [diff] [blame] | 4755 | This command will print 4 bytes (10,11,12,13) each 500 ms. |
| 4756 | |
wdenk | 07d7e6b | 2004-12-16 21:44:03 +0000 | [diff] [blame] | 4757 | => mwc.l 100 12345678 10 |
stroese | cc3af83 | 2004-12-16 18:46:55 +0000 | [diff] [blame] | 4758 | This command will write 12345678 to address 100 all 10 ms. |
| 4759 | |
wdenk | 07d7e6b | 2004-12-16 21:44:03 +0000 | [diff] [blame] | 4760 | This only takes effect if the memory commands are activated |
Jon Loeliger | c1da5c9 | 2007-06-11 19:03:39 -0500 | [diff] [blame] | 4761 | globally (CONFIG_CMD_MEM). |
stroese | cc3af83 | 2004-12-16 18:46:55 +0000 | [diff] [blame] | 4762 | |
wdenk | 3d3d99f | 2005-04-04 12:44:11 +0000 | [diff] [blame] | 4763 | - CONFIG_SKIP_LOWLEVEL_INIT |
Macpaul Lin | 1cac36e | 2011-10-19 20:41:11 +0000 | [diff] [blame] | 4764 | [ARM, NDS32, MIPS only] If this variable is defined, then certain |
Wolfgang Denk | 302141d | 2010-11-27 23:30:56 +0100 | [diff] [blame] | 4765 | low level initializations (like setting up the memory |
| 4766 | controller) are omitted and/or U-Boot does not |
| 4767 | relocate itself into RAM. |
wdenk | 3d3d99f | 2005-04-04 12:44:11 +0000 | [diff] [blame] | 4768 | |
Wolfgang Denk | 302141d | 2010-11-27 23:30:56 +0100 | [diff] [blame] | 4769 | Normally this variable MUST NOT be defined. The only |
| 4770 | exception is when U-Boot is loaded (to RAM) by some |
| 4771 | other boot loader or by a debugger which performs |
| 4772 | these initializations itself. |
wdenk | 3d3d99f | 2005-04-04 12:44:11 +0000 | [diff] [blame] | 4773 | |
Simon Glass | 9084407 | 2016-05-05 07:28:06 -0600 | [diff] [blame] | 4774 | - CONFIG_SKIP_LOWLEVEL_INIT_ONLY |
| 4775 | [ARM926EJ-S only] This allows just the call to lowlevel_init() |
yeongjun Kim | 7a20368 | 2016-07-20 22:56:12 +0900 | [diff] [blame] | 4776 | to be skipped. The normal CP15 init (such as enabling the |
Simon Glass | 9084407 | 2016-05-05 07:28:06 -0600 | [diff] [blame] | 4777 | instruction cache) is still performed. |
| 4778 | |
Aneesh V | 552a319 | 2011-07-13 05:11:07 +0000 | [diff] [blame] | 4779 | - CONFIG_SPL_BUILD |
Magnus Lilja | 1ec96d8 | 2009-06-13 20:50:00 +0200 | [diff] [blame] | 4780 | Modifies the behaviour of start.S when compiling a loader |
| 4781 | that is executed before the actual U-Boot. E.g. when |
| 4782 | compiling a NAND SPL. |
wdenk | 336b2bc | 2005-04-02 23:52:25 +0000 | [diff] [blame] | 4783 | |
Ying Zhang | 2d2e3b6 | 2013-08-16 15:16:15 +0800 | [diff] [blame] | 4784 | - CONFIG_TPL_BUILD |
| 4785 | Modifies the behaviour of start.S when compiling a loader |
| 4786 | that is executed after the SPL and before the actual U-Boot. |
| 4787 | It is loaded by the SPL. |
| 4788 | |
Ying Zhang | 0d4f544 | 2013-05-20 14:07:23 +0800 | [diff] [blame] | 4789 | - CONFIG_SYS_MPC85XX_NO_RESETVEC |
| 4790 | Only for 85xx systems. If this variable is specified, the section |
| 4791 | .resetvec is not kept and the section .bootpg is placed in the |
| 4792 | previous 4k of the .text section. |
| 4793 | |
Simon Glass | 17dabf0 | 2013-02-24 17:33:14 +0000 | [diff] [blame] | 4794 | - CONFIG_ARCH_MAP_SYSMEM |
| 4795 | Generally U-Boot (and in particular the md command) uses |
| 4796 | effective address. It is therefore not necessary to regard |
| 4797 | U-Boot address as virtual addresses that need to be translated |
| 4798 | to physical addresses. However, sandbox requires this, since |
| 4799 | it maintains its own little RAM buffer which contains all |
| 4800 | addressable memory. This option causes some memory accesses |
| 4801 | to be mapped through map_sysmem() / unmap_sysmem(). |
| 4802 | |
Matthias Weisser | 93416c1 | 2011-03-10 21:36:32 +0000 | [diff] [blame] | 4803 | - CONFIG_USE_ARCH_MEMCPY |
| 4804 | CONFIG_USE_ARCH_MEMSET |
| 4805 | If these options are used a optimized version of memcpy/memset will |
| 4806 | be used if available. These functions may be faster under some |
| 4807 | conditions but may increase the binary size. |
| 4808 | |
Simon Glass | bfb5980 | 2013-02-14 04:18:54 +0000 | [diff] [blame] | 4809 | - CONFIG_X86_RESET_VECTOR |
| 4810 | If defined, the x86 reset vector code is included. This is not |
| 4811 | needed when U-Boot is running from Coreboot. |
Gabe Black | 14f8246 | 2012-11-27 21:08:06 +0000 | [diff] [blame] | 4812 | |
Mark Jackson | 52b003c | 2013-03-04 01:27:20 +0000 | [diff] [blame] | 4813 | - CONFIG_SYS_MPUCLK |
| 4814 | Defines the MPU clock speed (in MHz). |
| 4815 | |
| 4816 | NOTE : currently only supported on AM335x platforms. |
Gabe Black | 76ce249 | 2012-11-29 16:23:41 +0000 | [diff] [blame] | 4817 | |
Heiko Schocher | 2233e46 | 2013-11-04 14:05:00 +0100 | [diff] [blame] | 4818 | - CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC: |
| 4819 | Enables the RTC32K OSC on AM33xx based plattforms |
| 4820 | |
Karicheri, Muralidharan | c1dc61b | 2014-04-04 13:16:50 -0400 | [diff] [blame] | 4821 | - CONFIG_SYS_NAND_NO_SUBPAGE_WRITE |
| 4822 | Option to disable subpage write in NAND driver |
| 4823 | driver that uses this: |
| 4824 | drivers/mtd/nand/davinci_nand.c |
| 4825 | |
Timur Tabi | 275f4bb | 2011-11-22 09:21:25 -0600 | [diff] [blame] | 4826 | Freescale QE/FMAN Firmware Support: |
| 4827 | ----------------------------------- |
| 4828 | |
| 4829 | The Freescale QUICCEngine (QE) and Frame Manager (FMAN) both support the |
| 4830 | loading of "firmware", which is encoded in the QE firmware binary format. |
| 4831 | This firmware often needs to be loaded during U-Boot booting, so macros |
| 4832 | are used to identify the storage device (NOR flash, SPI, etc) and the address |
| 4833 | within that device. |
| 4834 | |
Zhao Qiang | 83a9084 | 2014-03-21 16:21:44 +0800 | [diff] [blame] | 4835 | - CONFIG_SYS_FMAN_FW_ADDR |
| 4836 | The address in the storage device where the FMAN microcode is located. The |
| 4837 | meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro |
| 4838 | is also specified. |
| 4839 | |
| 4840 | - CONFIG_SYS_QE_FW_ADDR |
| 4841 | The address in the storage device where the QE microcode is located. The |
Timur Tabi | 275f4bb | 2011-11-22 09:21:25 -0600 | [diff] [blame] | 4842 | meaning of this address depends on which CONFIG_SYS_QE_FW_IN_xxx macro |
| 4843 | is also specified. |
| 4844 | |
| 4845 | - CONFIG_SYS_QE_FMAN_FW_LENGTH |
| 4846 | The maximum possible size of the firmware. The firmware binary format |
| 4847 | has a field that specifies the actual size of the firmware, but it |
| 4848 | might not be possible to read any part of the firmware unless some |
| 4849 | local storage is allocated to hold the entire firmware first. |
| 4850 | |
| 4851 | - CONFIG_SYS_QE_FMAN_FW_IN_NOR |
| 4852 | Specifies that QE/FMAN firmware is located in NOR flash, mapped as |
| 4853 | normal addressable memory via the LBC. CONFIG_SYS_FMAN_FW_ADDR is the |
| 4854 | virtual address in NOR flash. |
| 4855 | |
| 4856 | - CONFIG_SYS_QE_FMAN_FW_IN_NAND |
| 4857 | Specifies that QE/FMAN firmware is located in NAND flash. |
| 4858 | CONFIG_SYS_FMAN_FW_ADDR is the offset within NAND flash. |
| 4859 | |
| 4860 | - CONFIG_SYS_QE_FMAN_FW_IN_MMC |
| 4861 | Specifies that QE/FMAN firmware is located on the primary SD/MMC |
| 4862 | device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. |
| 4863 | |
| 4864 | - CONFIG_SYS_QE_FMAN_FW_IN_SPIFLASH |
| 4865 | Specifies that QE/FMAN firmware is located on the primary SPI |
| 4866 | device. CONFIG_SYS_FMAN_FW_ADDR is the byte offset on that device. |
| 4867 | |
Liu Gang | 1e08458 | 2012-03-08 00:33:18 +0000 | [diff] [blame] | 4868 | - CONFIG_SYS_QE_FMAN_FW_IN_REMOTE |
| 4869 | Specifies that QE/FMAN firmware is located in the remote (master) |
| 4870 | memory space. CONFIG_SYS_FMAN_FW_ADDR is a virtual address which |
Liu Gang | 357bf5a | 2012-08-09 05:10:01 +0000 | [diff] [blame] | 4871 | can be mapped from slave TLB->slave LAW->slave SRIO or PCIE outbound |
| 4872 | window->master inbound window->master LAW->the ucode address in |
| 4873 | master's memory space. |
Timur Tabi | 275f4bb | 2011-11-22 09:21:25 -0600 | [diff] [blame] | 4874 | |
J. German Rivera | 8ff14b7 | 2014-06-23 15:15:55 -0700 | [diff] [blame] | 4875 | Freescale Layerscape Management Complex Firmware Support: |
| 4876 | --------------------------------------------------------- |
| 4877 | The Freescale Layerscape Management Complex (MC) supports the loading of |
| 4878 | "firmware". |
| 4879 | This firmware often needs to be loaded during U-Boot booting, so macros |
| 4880 | are used to identify the storage device (NOR flash, SPI, etc) and the address |
| 4881 | within that device. |
| 4882 | |
| 4883 | - CONFIG_FSL_MC_ENET |
| 4884 | Enable the MC driver for Layerscape SoCs. |
| 4885 | |
| 4886 | - CONFIG_SYS_LS_MC_FW_ADDR |
| 4887 | The address in the storage device where the firmware is located. The |
| 4888 | meaning of this address depends on which CONFIG_SYS_LS_MC_FW_IN_xxx macro |
| 4889 | is also specified. |
| 4890 | |
| 4891 | - CONFIG_SYS_LS_MC_FW_LENGTH |
| 4892 | The maximum possible size of the firmware. The firmware binary format |
| 4893 | has a field that specifies the actual size of the firmware, but it |
| 4894 | might not be possible to read any part of the firmware unless some |
| 4895 | local storage is allocated to hold the entire firmware first. |
| 4896 | |
| 4897 | - CONFIG_SYS_LS_MC_FW_IN_NOR |
| 4898 | Specifies that MC firmware is located in NOR flash, mapped as |
| 4899 | normal addressable memory via the LBC. CONFIG_SYS_LS_MC_FW_ADDR is the |
| 4900 | virtual address in NOR flash. |
| 4901 | |
Prabhakar Kushwaha | 853a901 | 2015-06-02 10:55:52 +0530 | [diff] [blame] | 4902 | Freescale Layerscape Debug Server Support: |
| 4903 | ------------------------------------------- |
| 4904 | The Freescale Layerscape Debug Server Support supports the loading of |
| 4905 | "Debug Server firmware" and triggering SP boot-rom. |
| 4906 | This firmware often needs to be loaded during U-Boot booting. |
| 4907 | |
York Sun | 928b681 | 2015-12-07 11:08:58 -0800 | [diff] [blame] | 4908 | - CONFIG_SYS_MC_RSV_MEM_ALIGN |
| 4909 | Define alignment of reserved memory MC requires |
Prabhakar Kushwaha | 853a901 | 2015-06-02 10:55:52 +0530 | [diff] [blame] | 4910 | |
Paul Kocialkowski | 7b91702 | 2015-07-26 18:48:15 +0200 | [diff] [blame] | 4911 | Reproducible builds |
| 4912 | ------------------- |
| 4913 | |
| 4914 | In order to achieve reproducible builds, timestamps used in the U-Boot build |
| 4915 | process have to be set to a fixed value. |
| 4916 | |
| 4917 | This is done using the SOURCE_DATE_EPOCH environment variable. |
| 4918 | SOURCE_DATE_EPOCH is to be set on the build host's shell, not as a configuration |
| 4919 | option for U-Boot or an environment variable in U-Boot. |
| 4920 | |
| 4921 | SOURCE_DATE_EPOCH should be set to a number of seconds since the epoch, in UTC. |
| 4922 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4923 | Building the Software: |
| 4924 | ====================== |
| 4925 | |
Wolfgang Denk | b240aef | 2008-03-26 10:40:12 +0100 | [diff] [blame] | 4926 | Building U-Boot has been tested in several native build environments |
| 4927 | and in many different cross environments. Of course we cannot support |
| 4928 | all possibly existing versions of cross development tools in all |
| 4929 | (potentially obsolete) versions. In case of tool chain problems we |
| 4930 | recommend to use the ELDK (see http://www.denx.de/wiki/DULG/ELDK) |
| 4931 | which is extensively used to build and test U-Boot. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4932 | |
Wolfgang Denk | b240aef | 2008-03-26 10:40:12 +0100 | [diff] [blame] | 4933 | If you are not using a native environment, it is assumed that you |
| 4934 | have GNU cross compiling tools available in your path. In this case, |
| 4935 | you must set the environment variable CROSS_COMPILE in your shell. |
| 4936 | Note that no changes to the Makefile or any other source files are |
| 4937 | necessary. For example using the ELDK on a 4xx CPU, please enter: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4938 | |
Wolfgang Denk | b240aef | 2008-03-26 10:40:12 +0100 | [diff] [blame] | 4939 | $ CROSS_COMPILE=ppc_4xx- |
| 4940 | $ export CROSS_COMPILE |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4941 | |
Peter Tyser | b06976d | 2009-03-13 18:54:51 -0500 | [diff] [blame] | 4942 | Note: If you wish to generate Windows versions of the utilities in |
| 4943 | the tools directory you can use the MinGW toolchain |
| 4944 | (http://www.mingw.org). Set your HOST tools to the MinGW |
| 4945 | toolchain and execute 'make tools'. For example: |
| 4946 | |
| 4947 | $ make HOSTCC=i586-mingw32msvc-gcc HOSTSTRIP=i586-mingw32msvc-strip tools |
| 4948 | |
| 4949 | Binaries such as tools/mkimage.exe will be created which can |
| 4950 | be executed on computers running Windows. |
| 4951 | |
Wolfgang Denk | b240aef | 2008-03-26 10:40:12 +0100 | [diff] [blame] | 4952 | U-Boot is intended to be simple to build. After installing the |
| 4953 | sources you must configure U-Boot for one specific board type. This |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4954 | is done by typing: |
| 4955 | |
Holger Freyther | 7ba4e57 | 2014-08-04 09:26:05 +0200 | [diff] [blame] | 4956 | make NAME_defconfig |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4957 | |
Holger Freyther | 7ba4e57 | 2014-08-04 09:26:05 +0200 | [diff] [blame] | 4958 | where "NAME_defconfig" is the name of one of the existing configu- |
Michael Jones | 5a7fb6f | 2012-03-15 22:48:10 +0000 | [diff] [blame] | 4959 | rations; see boards.cfg for supported names. |
wdenk | 2f0812d | 2003-10-08 22:45:44 +0000 | [diff] [blame] | 4960 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 4961 | Note: for some board special configuration names may exist; check if |
| 4962 | additional information is available from the board vendor; for |
| 4963 | instance, the TQM823L systems are available without (standard) |
| 4964 | or with LCD support. You can select such additional "features" |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 4965 | when choosing the configuration, i. e. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4966 | |
Holger Freyther | 7ba4e57 | 2014-08-04 09:26:05 +0200 | [diff] [blame] | 4967 | make TQM823L_defconfig |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 4968 | - will configure for a plain TQM823L, i. e. no LCD support |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4969 | |
Holger Freyther | 7ba4e57 | 2014-08-04 09:26:05 +0200 | [diff] [blame] | 4970 | make TQM823L_LCD_defconfig |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 4971 | - will configure for a TQM823L with U-Boot console on LCD |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4972 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 4973 | etc. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4974 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4975 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 4976 | Finally, type "make all", and you should get some working U-Boot |
| 4977 | images ready for download to / installation on your system: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4978 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 4979 | - "u-boot.bin" is a raw binary image |
| 4980 | - "u-boot" is an image in ELF binary format |
| 4981 | - "u-boot.srec" is in Motorola S-Record format |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 4982 | |
Marian Balakowicz | efe063f | 2006-09-07 17:25:40 +0200 | [diff] [blame] | 4983 | By default the build is performed locally and the objects are saved |
| 4984 | in the source directory. One of the two methods can be used to change |
| 4985 | this behavior and build U-Boot to some external directory: |
| 4986 | |
| 4987 | 1. Add O= to the make command line invocations: |
| 4988 | |
| 4989 | make O=/tmp/build distclean |
Holger Freyther | 7ba4e57 | 2014-08-04 09:26:05 +0200 | [diff] [blame] | 4990 | make O=/tmp/build NAME_defconfig |
Marian Balakowicz | efe063f | 2006-09-07 17:25:40 +0200 | [diff] [blame] | 4991 | make O=/tmp/build all |
| 4992 | |
Timo Ketola | c8c6760 | 2014-11-06 14:39:05 +0200 | [diff] [blame] | 4993 | 2. Set environment variable KBUILD_OUTPUT to point to the desired location: |
Marian Balakowicz | efe063f | 2006-09-07 17:25:40 +0200 | [diff] [blame] | 4994 | |
Timo Ketola | c8c6760 | 2014-11-06 14:39:05 +0200 | [diff] [blame] | 4995 | export KBUILD_OUTPUT=/tmp/build |
Marian Balakowicz | efe063f | 2006-09-07 17:25:40 +0200 | [diff] [blame] | 4996 | make distclean |
Holger Freyther | 7ba4e57 | 2014-08-04 09:26:05 +0200 | [diff] [blame] | 4997 | make NAME_defconfig |
Marian Balakowicz | efe063f | 2006-09-07 17:25:40 +0200 | [diff] [blame] | 4998 | make all |
| 4999 | |
Timo Ketola | c8c6760 | 2014-11-06 14:39:05 +0200 | [diff] [blame] | 5000 | Note that the command line "O=" setting overrides the KBUILD_OUTPUT environment |
Marian Balakowicz | efe063f | 2006-09-07 17:25:40 +0200 | [diff] [blame] | 5001 | variable. |
| 5002 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5003 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5004 | Please be aware that the Makefiles assume you are using GNU make, so |
| 5005 | for instance on NetBSD you might need to use "gmake" instead of |
| 5006 | native "make". |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5007 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5008 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5009 | If the system board that you have is not listed, then you will need |
| 5010 | to port U-Boot to your hardware platform. To do this, follow these |
| 5011 | steps: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5012 | |
Phil Sutter | c77b488 | 2015-12-25 14:41:18 +0100 | [diff] [blame] | 5013 | 1. Create a new directory to hold your board specific code. Add any |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5014 | files you need. In your board directory, you will need at least |
Phil Sutter | c77b488 | 2015-12-25 14:41:18 +0100 | [diff] [blame] | 5015 | the "Makefile" and a "<board>.c". |
| 5016 | 2. Create a new configuration file "include/configs/<board>.h" for |
| 5017 | your board. |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5018 | 3. If you're porting U-Boot to a new CPU, then also create a new |
| 5019 | directory to hold your CPU specific code. Add any files you need. |
Holger Freyther | 7ba4e57 | 2014-08-04 09:26:05 +0200 | [diff] [blame] | 5020 | 4. Run "make <board>_defconfig" with your new name. |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5021 | 5. Type "make", and you should get a working "u-boot.srec" file |
| 5022 | to be installed on your target system. |
| 5023 | 6. Debug and solve any problems that might arise. |
| 5024 | [Of course, this last step is much harder than it sounds.] |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5025 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5026 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5027 | Testing of U-Boot Modifications, Ports to New Hardware, etc.: |
| 5028 | ============================================================== |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5029 | |
Wolfgang Denk | b240aef | 2008-03-26 10:40:12 +0100 | [diff] [blame] | 5030 | If you have modified U-Boot sources (for instance added a new board |
| 5031 | or support for new devices, a new CPU, etc.) you are expected to |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5032 | provide feedback to the other developers. The feedback normally takes |
| 5033 | the form of a "patch", i. e. a context diff against a certain (latest |
Wolfgang Denk | b240aef | 2008-03-26 10:40:12 +0100 | [diff] [blame] | 5034 | official or latest in the git repository) version of U-Boot sources. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5035 | |
Wolfgang Denk | b240aef | 2008-03-26 10:40:12 +0100 | [diff] [blame] | 5036 | But before you submit such a patch, please verify that your modifi- |
| 5037 | cation did not break existing code. At least make sure that *ALL* of |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5038 | the supported boards compile WITHOUT ANY compiler warnings. To do so, |
Simon Glass | dc27def | 2016-07-27 20:33:08 -0600 | [diff] [blame] | 5039 | just run the buildman script (tools/buildman/buildman), which will |
| 5040 | configure and build U-Boot for ALL supported system. Be warned, this |
| 5041 | will take a while. Please see the buildman README, or run 'buildman -H' |
| 5042 | for documentation. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5043 | |
Marian Balakowicz | efe063f | 2006-09-07 17:25:40 +0200 | [diff] [blame] | 5044 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5045 | See also "U-Boot Porting Guide" below. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5046 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5047 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5048 | Monitor Commands - Overview: |
| 5049 | ============================ |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5050 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5051 | go - start application at address 'addr' |
| 5052 | run - run commands in an environment variable |
| 5053 | bootm - boot application image from memory |
| 5054 | bootp - boot image via network using BootP/TFTP protocol |
Marek Vasut | cf41a9b | 2012-03-14 21:52:45 +0000 | [diff] [blame] | 5055 | bootz - boot zImage from memory |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5056 | tftpboot- boot image via network using TFTP protocol |
| 5057 | and env variables "ipaddr" and "serverip" |
| 5058 | (and eventually "gatewayip") |
Simon Glass | 6a398d2 | 2011-10-24 18:00:07 +0000 | [diff] [blame] | 5059 | tftpput - upload a file via network using TFTP protocol |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5060 | rarpboot- boot image via network using RARP/TFTP protocol |
| 5061 | diskboot- boot from IDE devicebootd - boot default, i.e., run 'bootcmd' |
| 5062 | loads - load S-Record file over serial line |
| 5063 | loadb - load binary file over serial line (kermit mode) |
| 5064 | md - memory display |
| 5065 | mm - memory modify (auto-incrementing) |
| 5066 | nm - memory modify (constant address) |
| 5067 | mw - memory write (fill) |
| 5068 | cp - memory copy |
| 5069 | cmp - memory compare |
| 5070 | crc32 - checksum calculation |
Peter Tyser | 469cde4 | 2009-04-18 22:34:03 -0500 | [diff] [blame] | 5071 | i2c - I2C sub-system |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5072 | sspi - SPI utility commands |
| 5073 | base - print or set address offset |
| 5074 | printenv- print environment variables |
| 5075 | setenv - set environment variables |
| 5076 | saveenv - save environment variables to persistent storage |
| 5077 | protect - enable or disable FLASH write protection |
| 5078 | erase - erase FLASH memory |
| 5079 | flinfo - print FLASH memory information |
Karl O. Pinc | 4baf03d | 2012-08-03 05:57:21 +0000 | [diff] [blame] | 5080 | nand - NAND memory operations (see doc/README.nand) |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5081 | bdinfo - print Board Info structure |
| 5082 | iminfo - print header information for application image |
| 5083 | coninfo - print console devices and informations |
| 5084 | ide - IDE sub-system |
| 5085 | loop - infinite loop on address range |
wdenk | 6451936 | 2004-07-11 17:40:54 +0000 | [diff] [blame] | 5086 | loopw - infinite write loop on address range |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5087 | mtest - simple RAM test |
| 5088 | icache - enable or disable instruction cache |
| 5089 | dcache - enable or disable data cache |
| 5090 | reset - Perform RESET of the CPU |
| 5091 | echo - echo args to console |
| 5092 | version - print monitor version |
| 5093 | help - print online help |
| 5094 | ? - alias for 'help' |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5095 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5096 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5097 | Monitor Commands - Detailed Description: |
| 5098 | ======================================== |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5099 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5100 | TODO. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5101 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5102 | For now: just type "help <command>". |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5103 | |
| 5104 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5105 | Environment Variables: |
| 5106 | ====================== |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5107 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5108 | U-Boot supports user configuration using Environment Variables which |
| 5109 | can be made persistent by saving to Flash memory. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5110 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5111 | Environment Variables are set using "setenv", printed using |
| 5112 | "printenv", and saved to Flash using "saveenv". Using "setenv" |
| 5113 | without a value can be used to delete a variable from the |
| 5114 | environment. As long as you don't save the environment you are |
| 5115 | working with an in-memory copy. In case the Flash area containing the |
| 5116 | environment is erased by accident, a default environment is provided. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5117 | |
Wolfgang Denk | b233bd7 | 2010-01-17 23:55:53 +0100 | [diff] [blame] | 5118 | Some configuration options can be set using Environment Variables. |
| 5119 | |
| 5120 | List of environment variables (most likely not complete): |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5121 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5122 | baudrate - see CONFIG_BAUDRATE |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5123 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5124 | bootdelay - see CONFIG_BOOTDELAY |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5125 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5126 | bootcmd - see CONFIG_BOOTCOMMAND |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5127 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5128 | bootargs - Boot arguments when booting an RTOS image |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5129 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5130 | bootfile - Name of the image to load with TFTP |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5131 | |
Bartlomiej Sieka | c5648c8 | 2008-04-14 15:44:16 +0200 | [diff] [blame] | 5132 | bootm_low - Memory range available for image processing in the bootm |
| 5133 | command can be restricted. This variable is given as |
| 5134 | a hexadecimal number and defines lowest address allowed |
| 5135 | for use by the bootm command. See also "bootm_size" |
| 5136 | environment variable. Address defined by "bootm_low" is |
| 5137 | also the base of the initial memory mapping for the Linux |
Grant Likely | 2639638 | 2011-03-28 09:58:43 +0000 | [diff] [blame] | 5138 | kernel -- see the description of CONFIG_SYS_BOOTMAPSZ and |
| 5139 | bootm_mapsize. |
| 5140 | |
Wolfgang Denk | 092ae95 | 2011-10-26 10:21:21 +0000 | [diff] [blame] | 5141 | bootm_mapsize - Size of the initial memory mapping for the Linux kernel. |
Grant Likely | 2639638 | 2011-03-28 09:58:43 +0000 | [diff] [blame] | 5142 | This variable is given as a hexadecimal number and it |
| 5143 | defines the size of the memory region starting at base |
| 5144 | address bootm_low that is accessible by the Linux kernel |
| 5145 | during early boot. If unset, CONFIG_SYS_BOOTMAPSZ is used |
| 5146 | as the default value if it is defined, and bootm_size is |
| 5147 | used otherwise. |
Bartlomiej Sieka | c5648c8 | 2008-04-14 15:44:16 +0200 | [diff] [blame] | 5148 | |
| 5149 | bootm_size - Memory range available for image processing in the bootm |
| 5150 | command can be restricted. This variable is given as |
| 5151 | a hexadecimal number and defines the size of the region |
| 5152 | allowed for use by the bootm command. See also "bootm_low" |
| 5153 | environment variable. |
| 5154 | |
Bartlomiej Sieka | e273e9f | 2008-10-01 15:26:31 +0200 | [diff] [blame] | 5155 | updatefile - Location of the software update file on a TFTP server, used |
| 5156 | by the automatic software update feature. Please refer to |
| 5157 | documentation in doc/README.update for more details. |
| 5158 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5159 | autoload - if set to "no" (any string beginning with 'n'), |
| 5160 | "bootp" will just load perform a lookup of the |
| 5161 | configuration from the BOOTP server, but not try to |
| 5162 | load any image using TFTP |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5163 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5164 | autostart - if set to "yes", an image loaded using the "bootp", |
| 5165 | "rarpboot", "tftpboot" or "diskboot" commands will |
| 5166 | be automatically started (by internally calling |
| 5167 | "bootm") |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5168 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5169 | If set to "no", a standalone image passed to the |
| 5170 | "bootm" command will be copied to the load address |
| 5171 | (and eventually uncompressed), but NOT be started. |
| 5172 | This can be used to load and uncompress arbitrary |
| 5173 | data. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5174 | |
David A. Long | d558a4e | 2011-07-09 16:40:19 -0400 | [diff] [blame] | 5175 | fdt_high - if set this restricts the maximum address that the |
| 5176 | flattened device tree will be copied into upon boot. |
Shawn Guo | 0ca9e98 | 2012-01-09 21:54:08 +0000 | [diff] [blame] | 5177 | For example, if you have a system with 1 GB memory |
| 5178 | at physical address 0x10000000, while Linux kernel |
| 5179 | only recognizes the first 704 MB as low memory, you |
| 5180 | may need to set fdt_high as 0x3C000000 to have the |
| 5181 | device tree blob be copied to the maximum address |
| 5182 | of the 704 MB low memory, so that Linux kernel can |
| 5183 | access it during the boot procedure. |
| 5184 | |
David A. Long | d558a4e | 2011-07-09 16:40:19 -0400 | [diff] [blame] | 5185 | If this is set to the special value 0xFFFFFFFF then |
| 5186 | the fdt will not be copied at all on boot. For this |
| 5187 | to work it must reside in writable memory, have |
| 5188 | sufficient padding on the end of it for u-boot to |
| 5189 | add the information it needs into it, and the memory |
| 5190 | must be accessible by the kernel. |
| 5191 | |
Simon Glass | dc6fa64 | 2011-10-24 19:15:34 +0000 | [diff] [blame] | 5192 | fdtcontroladdr- if set this is the address of the control flattened |
| 5193 | device tree used by U-Boot when CONFIG_OF_CONTROL is |
| 5194 | defined. |
| 5195 | |
wdenk | 0e2bd9c | 2004-06-06 21:51:03 +0000 | [diff] [blame] | 5196 | i2cfast - (PPC405GP|PPC405EP only) |
| 5197 | if set to 'y' configures Linux I2C driver for fast |
| 5198 | mode (400kHZ). This environment variable is used in |
| 5199 | initialization code. So, for changes to be effective |
| 5200 | it must be saved and board must be reset. |
| 5201 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5202 | initrd_high - restrict positioning of initrd images: |
| 5203 | If this variable is not set, initrd images will be |
| 5204 | copied to the highest possible address in RAM; this |
| 5205 | is usually what you want since it allows for |
| 5206 | maximum initrd size. If for some reason you want to |
| 5207 | make sure that the initrd image is loaded below the |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 5208 | CONFIG_SYS_BOOTMAPSZ limit, you can set this environment |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5209 | variable to a value of "no" or "off" or "0". |
| 5210 | Alternatively, you can set it to a maximum upper |
| 5211 | address to use (U-Boot will still check that it |
| 5212 | does not overwrite the U-Boot stack and data). |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5213 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5214 | For instance, when you have a system with 16 MB |
| 5215 | RAM, and want to reserve 4 MB from use by Linux, |
| 5216 | you can do this by adding "mem=12M" to the value of |
| 5217 | the "bootargs" variable. However, now you must make |
| 5218 | sure that the initrd image is placed in the first |
| 5219 | 12 MB as well - this can be done with |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5220 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5221 | setenv initrd_high 00c00000 |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5222 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5223 | If you set initrd_high to 0xFFFFFFFF, this is an |
| 5224 | indication to U-Boot that all addresses are legal |
| 5225 | for the Linux kernel, including addresses in flash |
| 5226 | memory. In this case U-Boot will NOT COPY the |
| 5227 | ramdisk at all. This may be useful to reduce the |
| 5228 | boot time on your system, but requires that this |
| 5229 | feature is supported by your Linux kernel. |
wdenk | 3f9ab98 | 2003-04-12 23:38:12 +0000 | [diff] [blame] | 5230 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5231 | ipaddr - IP address; needed for tftpboot command |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5232 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5233 | loadaddr - Default load address for commands like "bootp", |
| 5234 | "rarpboot", "tftpboot", "loadb" or "diskboot" |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5235 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5236 | loads_echo - see CONFIG_LOADS_ECHO |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5237 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5238 | serverip - TFTP server IP address; needed for tftpboot command |
wdenk | 6f770ed | 2003-05-23 23:18:21 +0000 | [diff] [blame] | 5239 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5240 | bootretry - see CONFIG_BOOT_RETRY_TIME |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5241 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5242 | bootdelaykey - see CONFIG_AUTOBOOT_DELAY_STR |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5243 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5244 | bootstopkey - see CONFIG_AUTOBOOT_STOP_STR |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5245 | |
Mike Frysinger | a23230c | 2011-10-02 10:01:27 +0000 | [diff] [blame] | 5246 | ethprime - controls which interface is used first. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5247 | |
Mike Frysinger | a23230c | 2011-10-02 10:01:27 +0000 | [diff] [blame] | 5248 | ethact - controls which interface is currently active. |
| 5249 | For example you can do the following |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5250 | |
Heiko Schocher | c5e8405 | 2010-07-20 17:45:02 +0200 | [diff] [blame] | 5251 | => setenv ethact FEC |
| 5252 | => ping 192.168.0.1 # traffic sent on FEC |
| 5253 | => setenv ethact SCC |
| 5254 | => ping 10.0.0.1 # traffic sent on SCC |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5255 | |
Matthias Fuchs | 204f0ec | 2008-01-17 07:45:05 +0100 | [diff] [blame] | 5256 | ethrotate - When set to "no" U-Boot does not go through all |
| 5257 | available network interfaces. |
| 5258 | It just stays at the currently selected interface. |
| 5259 | |
Wolfgang Denk | b233bd7 | 2010-01-17 23:55:53 +0100 | [diff] [blame] | 5260 | netretry - When set to "no" each network operation will |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5261 | either succeed or fail without retrying. |
| 5262 | When set to "once" the network operation will |
| 5263 | fail when all the available network interfaces |
| 5264 | are tried once without success. |
| 5265 | Useful on scripts which control the retry operation |
| 5266 | themselves. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5267 | |
Jean-Christophe PLAGNIOL-VILLARD | 1948d6c | 2009-01-31 09:53:39 +0100 | [diff] [blame] | 5268 | npe_ucode - set load address for the NPE microcode |
Jean-Christophe PLAGNIOL-VILLARD | d2164ef | 2008-01-07 08:41:34 +0100 | [diff] [blame] | 5269 | |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 5270 | silent_linux - If set then Linux will be told to boot silently, by |
Simon Glass | 5db3f93 | 2013-07-16 20:10:00 -0700 | [diff] [blame] | 5271 | changing the console to be empty. If "yes" it will be |
| 5272 | made silent. If "no" it will not be made silent. If |
| 5273 | unset, then it will be made silent if the U-Boot console |
| 5274 | is silent. |
| 5275 | |
Albert ARIBAUD \(3ADEV\) | 8300685 | 2015-10-12 00:02:57 +0200 | [diff] [blame] | 5276 | tftpsrcp - If this is set, the value is used for TFTP's |
Wolfgang Denk | e3cfce5 | 2005-09-24 22:37:32 +0200 | [diff] [blame] | 5277 | UDP source port. |
| 5278 | |
Albert ARIBAUD \(3ADEV\) | 8300685 | 2015-10-12 00:02:57 +0200 | [diff] [blame] | 5279 | tftpdstp - If this is set, the value is used for TFTP's UDP |
Wolfgang Denk | 227b519 | 2005-09-24 23:25:46 +0200 | [diff] [blame] | 5280 | destination port instead of the Well Know Port 69. |
| 5281 | |
Wolfgang Denk | b233bd7 | 2010-01-17 23:55:53 +0100 | [diff] [blame] | 5282 | tftpblocksize - Block size to use for TFTP transfers; if not set, |
| 5283 | we use the TFTP server's default block size |
| 5284 | |
| 5285 | tftptimeout - Retransmission timeout for TFTP packets (in milli- |
| 5286 | seconds, minimum value is 1000 = 1 second). Defines |
| 5287 | when a packet is considered to be lost so it has to |
| 5288 | be retransmitted. The default is 5000 = 5 seconds. |
| 5289 | Lowering this value may make downloads succeed |
| 5290 | faster in networks with high packet loss rates or |
| 5291 | with unreliable TFTP servers. |
| 5292 | |
Albert ARIBAUD \(3ADEV\) | 8300685 | 2015-10-12 00:02:57 +0200 | [diff] [blame] | 5293 | tftptimeoutcountmax - maximum count of TFTP timeouts (no |
| 5294 | unit, minimum value = 0). Defines how many timeouts |
| 5295 | can happen during a single file transfer before that |
| 5296 | transfer is aborted. The default is 10, and 0 means |
| 5297 | 'no timeouts allowed'. Increasing this value may help |
| 5298 | downloads succeed with high packet loss rates, or with |
| 5299 | unreliable TFTP servers or client hardware. |
| 5300 | |
Wolfgang Denk | b233bd7 | 2010-01-17 23:55:53 +0100 | [diff] [blame] | 5301 | vlan - When set to a value < 4095 the traffic over |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 5302 | Ethernet is encapsulated/received over 802.1q |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5303 | VLAN tagged frames. |
wdenk | 145d2c1 | 2004-04-15 21:48:45 +0000 | [diff] [blame] | 5304 | |
Alexandre Messier | 1597132 | 2016-02-01 17:08:57 -0500 | [diff] [blame] | 5305 | bootpretryperiod - Period during which BOOTP/DHCP sends retries. |
| 5306 | Unsigned value, in milliseconds. If not set, the period will |
| 5307 | be either the default (28000), or a value based on |
| 5308 | CONFIG_NET_RETRY_COUNT, if defined. This value has |
| 5309 | precedence over the valu based on CONFIG_NET_RETRY_COUNT. |
| 5310 | |
Jason Hobbs | e3fe08e | 2011-08-31 05:37:28 +0000 | [diff] [blame] | 5311 | The following image location variables contain the location of images |
| 5312 | used in booting. The "Image" column gives the role of the image and is |
| 5313 | not an environment variable name. The other columns are environment |
| 5314 | variable names. "File Name" gives the name of the file on a TFTP |
| 5315 | server, "RAM Address" gives the location in RAM the image will be |
| 5316 | loaded to, and "Flash Location" gives the image's address in NOR |
| 5317 | flash or offset in NAND flash. |
| 5318 | |
| 5319 | *Note* - these variables don't have to be defined for all boards, some |
Fabio Estevam | bb7d497 | 2015-04-25 18:53:10 -0300 | [diff] [blame] | 5320 | boards currently use other variables for these purposes, and some |
Jason Hobbs | e3fe08e | 2011-08-31 05:37:28 +0000 | [diff] [blame] | 5321 | boards use these variables for other purposes. |
| 5322 | |
Wolfgang Denk | 092ae95 | 2011-10-26 10:21:21 +0000 | [diff] [blame] | 5323 | Image File Name RAM Address Flash Location |
| 5324 | ----- --------- ----------- -------------- |
| 5325 | u-boot u-boot u-boot_addr_r u-boot_addr |
| 5326 | Linux kernel bootfile kernel_addr_r kernel_addr |
| 5327 | device tree blob fdtfile fdt_addr_r fdt_addr |
| 5328 | ramdisk ramdiskfile ramdisk_addr_r ramdisk_addr |
Jason Hobbs | e3fe08e | 2011-08-31 05:37:28 +0000 | [diff] [blame] | 5329 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5330 | The following environment variables may be used and automatically |
| 5331 | updated by the network boot commands ("bootp" and "rarpboot"), |
| 5332 | depending the information provided by your boot server: |
wdenk | 145d2c1 | 2004-04-15 21:48:45 +0000 | [diff] [blame] | 5333 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5334 | bootfile - see above |
| 5335 | dnsip - IP address of your Domain Name Server |
| 5336 | dnsip2 - IP address of your secondary Domain Name Server |
| 5337 | gatewayip - IP address of the Gateway (Router) to use |
| 5338 | hostname - Target hostname |
| 5339 | ipaddr - see above |
| 5340 | netmask - Subnet Mask |
| 5341 | rootpath - Pathname of the root filesystem on the NFS server |
| 5342 | serverip - see above |
wdenk | 145d2c1 | 2004-04-15 21:48:45 +0000 | [diff] [blame] | 5343 | |
wdenk | 145d2c1 | 2004-04-15 21:48:45 +0000 | [diff] [blame] | 5344 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5345 | There are two special Environment Variables: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5346 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5347 | serial# - contains hardware identification information such |
| 5348 | as type string and/or serial number |
| 5349 | ethaddr - Ethernet address |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5350 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5351 | These variables can be set only once (usually during manufacturing of |
| 5352 | the board). U-Boot refuses to delete or overwrite these variables |
| 5353 | once they have been set once. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5354 | |
| 5355 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5356 | Further special Environment Variables: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5357 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5358 | ver - Contains the U-Boot version string as printed |
| 5359 | with the "version" command. This variable is |
| 5360 | readonly (see CONFIG_VERSION_VARIABLE). |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5361 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5362 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5363 | Please note that changes to some configuration parameters may take |
| 5364 | only effect after the next boot (yes, that's just like Windoze :-). |
stroese | b9c17c5 | 2003-04-04 15:53:41 +0000 | [diff] [blame] | 5365 | |
stroese | b9c17c5 | 2003-04-04 15:53:41 +0000 | [diff] [blame] | 5366 | |
Joe Hershberger | 60fd3ad | 2012-12-11 22:16:24 -0600 | [diff] [blame] | 5367 | Callback functions for environment variables: |
| 5368 | --------------------------------------------- |
| 5369 | |
| 5370 | For some environment variables, the behavior of u-boot needs to change |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 5371 | when their values are changed. This functionality allows functions to |
Joe Hershberger | 60fd3ad | 2012-12-11 22:16:24 -0600 | [diff] [blame] | 5372 | be associated with arbitrary variables. On creation, overwrite, or |
| 5373 | deletion, the callback will provide the opportunity for some side |
| 5374 | effect to happen or for the change to be rejected. |
| 5375 | |
| 5376 | The callbacks are named and associated with a function using the |
| 5377 | U_BOOT_ENV_CALLBACK macro in your board or driver code. |
| 5378 | |
| 5379 | These callbacks are associated with variables in one of two ways. The |
| 5380 | static list can be added to by defining CONFIG_ENV_CALLBACK_LIST_STATIC |
| 5381 | in the board configuration to a string that defines a list of |
| 5382 | associations. The list must be in the following format: |
| 5383 | |
| 5384 | entry = variable_name[:callback_name] |
| 5385 | list = entry[,list] |
| 5386 | |
| 5387 | If the callback name is not specified, then the callback is deleted. |
| 5388 | Spaces are also allowed anywhere in the list. |
| 5389 | |
| 5390 | Callbacks can also be associated by defining the ".callbacks" variable |
| 5391 | with the same list format above. Any association in ".callbacks" will |
| 5392 | override any association in the static list. You can define |
| 5393 | CONFIG_ENV_CALLBACK_LIST_DEFAULT to a list (string) to define the |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 5394 | ".callbacks" environment variable in the default or embedded environment. |
Joe Hershberger | 60fd3ad | 2012-12-11 22:16:24 -0600 | [diff] [blame] | 5395 | |
Joe Hershberger | 6db9fd4 | 2015-05-20 14:27:20 -0500 | [diff] [blame] | 5396 | If CONFIG_REGEX is defined, the variable_name above is evaluated as a |
| 5397 | regular expression. This allows multiple variables to be connected to |
| 5398 | the same callback without explicitly listing them all out. |
| 5399 | |
Joe Hershberger | 60fd3ad | 2012-12-11 22:16:24 -0600 | [diff] [blame] | 5400 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5401 | Command Line Parsing: |
| 5402 | ===================== |
stroese | b9c17c5 | 2003-04-04 15:53:41 +0000 | [diff] [blame] | 5403 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5404 | There are two different command line parsers available with U-Boot: |
| 5405 | the old "simple" one, and the much more powerful "hush" shell: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5406 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5407 | Old, simple command line parser: |
| 5408 | -------------------------------- |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5409 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5410 | - supports environment variables (through setenv / saveenv commands) |
| 5411 | - several commands on one line, separated by ';' |
Wolfgang Denk | 86eb3b7 | 2005-11-20 21:40:11 +0100 | [diff] [blame] | 5412 | - variable substitution using "... ${name} ..." syntax |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5413 | - special characters ('$', ';') can be escaped by prefixing with '\', |
| 5414 | for example: |
Wolfgang Denk | 86eb3b7 | 2005-11-20 21:40:11 +0100 | [diff] [blame] | 5415 | setenv bootcmd bootm \${address} |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5416 | - You can also escape text by enclosing in single apostrophes, for example: |
| 5417 | setenv addip 'setenv bootargs $bootargs ip=$ipaddr:$serverip:$gatewayip:$netmask:$hostname::off' |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5418 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5419 | Hush shell: |
| 5420 | ----------- |
wdenk | f4688a2 | 2003-05-28 08:06:31 +0000 | [diff] [blame] | 5421 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5422 | - similar to Bourne shell, with control structures like |
| 5423 | if...then...else...fi, for...do...done; while...do...done, |
| 5424 | until...do...done, ... |
| 5425 | - supports environment ("global") variables (through setenv / saveenv |
| 5426 | commands) and local shell variables (through standard shell syntax |
| 5427 | "name=value"); only environment variables can be used with "run" |
| 5428 | command |
wdenk | f4688a2 | 2003-05-28 08:06:31 +0000 | [diff] [blame] | 5429 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5430 | General rules: |
| 5431 | -------------- |
wdenk | f4688a2 | 2003-05-28 08:06:31 +0000 | [diff] [blame] | 5432 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5433 | (1) If a command line (or an environment variable executed by a "run" |
| 5434 | command) contains several commands separated by semicolon, and |
| 5435 | one of these commands fails, then the remaining commands will be |
| 5436 | executed anyway. |
wdenk | f4688a2 | 2003-05-28 08:06:31 +0000 | [diff] [blame] | 5437 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5438 | (2) If you execute several variables with one call to run (i. e. |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 5439 | calling run with a list of variables as arguments), any failing |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5440 | command will cause "run" to terminate, i. e. the remaining |
| 5441 | variables are not executed. |
wdenk | f4688a2 | 2003-05-28 08:06:31 +0000 | [diff] [blame] | 5442 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5443 | Note for Redundant Ethernet Interfaces: |
| 5444 | ======================================= |
wdenk | f4688a2 | 2003-05-28 08:06:31 +0000 | [diff] [blame] | 5445 | |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 5446 | Some boards come with redundant Ethernet interfaces; U-Boot supports |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5447 | such configurations and is capable of automatic selection of a |
| 5448 | "working" interface when needed. MAC assignment works as follows: |
wdenk | f4688a2 | 2003-05-28 08:06:31 +0000 | [diff] [blame] | 5449 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5450 | Network interfaces are numbered eth0, eth1, eth2, ... Corresponding |
| 5451 | MAC addresses can be stored in the environment as "ethaddr" (=>eth0), |
| 5452 | "eth1addr" (=>eth1), "eth2addr", ... |
wdenk | f4688a2 | 2003-05-28 08:06:31 +0000 | [diff] [blame] | 5453 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5454 | If the network interface stores some valid MAC address (for instance |
| 5455 | in SROM), this is used as default address if there is NO correspon- |
| 5456 | ding setting in the environment; if the corresponding environment |
| 5457 | variable is set, this overrides the settings in the card; that means: |
wdenk | f4688a2 | 2003-05-28 08:06:31 +0000 | [diff] [blame] | 5458 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5459 | o If the SROM has a valid MAC address, and there is no address in the |
| 5460 | environment, the SROM's address is used. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5461 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5462 | o If there is no valid address in the SROM, and a definition in the |
| 5463 | environment exists, then the value from the environment variable is |
| 5464 | used. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5465 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5466 | o If both the SROM and the environment contain a MAC address, and |
| 5467 | both addresses are the same, this MAC address is used. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5468 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5469 | o If both the SROM and the environment contain a MAC address, and the |
| 5470 | addresses differ, the value from the environment is used and a |
| 5471 | warning is printed. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5472 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5473 | o If neither SROM nor the environment contain a MAC address, an error |
Joe Hershberger | 2dc2b5d | 2015-05-04 14:55:13 -0500 | [diff] [blame] | 5474 | is raised. If CONFIG_NET_RANDOM_ETHADDR is defined, then in this case |
| 5475 | a random, locally-assigned MAC is used. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5476 | |
Ben Warren | 6db991a | 2010-04-26 11:11:46 -0700 | [diff] [blame] | 5477 | If Ethernet drivers implement the 'write_hwaddr' function, valid MAC addresses |
Wolfgang Denk | 092ae95 | 2011-10-26 10:21:21 +0000 | [diff] [blame] | 5478 | will be programmed into hardware as part of the initialization process. This |
Ben Warren | 6db991a | 2010-04-26 11:11:46 -0700 | [diff] [blame] | 5479 | may be skipped by setting the appropriate 'ethmacskip' environment variable. |
| 5480 | The naming convention is as follows: |
| 5481 | "ethmacskip" (=>eth0), "eth1macskip" (=>eth1) etc. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5482 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5483 | Image Formats: |
| 5484 | ============== |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5485 | |
Marian Balakowicz | 18710b8 | 2008-03-12 12:13:13 +0100 | [diff] [blame] | 5486 | U-Boot is capable of booting (and performing other auxiliary operations on) |
| 5487 | images in two formats: |
| 5488 | |
| 5489 | New uImage format (FIT) |
| 5490 | ----------------------- |
| 5491 | |
| 5492 | Flexible and powerful format based on Flattened Image Tree -- FIT (similar |
| 5493 | to Flattened Device Tree). It allows the use of images with multiple |
| 5494 | components (several kernels, ramdisks, etc.), with contents protected by |
| 5495 | SHA1, MD5 or CRC32. More details are found in the doc/uImage.FIT directory. |
| 5496 | |
| 5497 | |
| 5498 | Old uImage format |
| 5499 | ----------------- |
| 5500 | |
| 5501 | Old image format is based on binary files which can be basically anything, |
| 5502 | preceded by a special header; see the definitions in include/image.h for |
| 5503 | details; basically, the header defines the following image properties: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5504 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5505 | * Target Operating System (Provisions for OpenBSD, NetBSD, FreeBSD, |
| 5506 | 4.4BSD, Linux, SVR4, Esix, Solaris, Irix, SCO, Dell, NCR, VxWorks, |
Peter Tyser | 56b8dd1 | 2008-09-08 14:56:49 -0500 | [diff] [blame] | 5507 | LynxOS, pSOS, QNX, RTEMS, INTEGRITY; |
| 5508 | Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS, |
| 5509 | INTEGRITY). |
Wolfgang Denk | 83c1585 | 2006-10-24 14:21:16 +0200 | [diff] [blame] | 5510 | * Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86, |
Macpaul Lin | 1cac36e | 2011-10-19 20:41:11 +0000 | [diff] [blame] | 5511 | IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit; |
| 5512 | Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC). |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5513 | * Compression Type (uncompressed, gzip, bzip2) |
| 5514 | * Load Address |
| 5515 | * Entry Point |
| 5516 | * Image Name |
| 5517 | * Image Timestamp |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5518 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5519 | The header is marked by a special Magic Number, and both the header |
| 5520 | and the data portions of the image are secured against corruption by |
| 5521 | CRC32 checksums. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5522 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5523 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5524 | Linux Support: |
| 5525 | ============== |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5526 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5527 | Although U-Boot should support any OS or standalone application |
| 5528 | easily, the main focus has always been on Linux during the design of |
| 5529 | U-Boot. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5530 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5531 | U-Boot includes many features that so far have been part of some |
| 5532 | special "boot loader" code within the Linux kernel. Also, any |
| 5533 | "initrd" images to be used are no longer part of one big Linux image; |
| 5534 | instead, kernel and "initrd" are separate images. This implementation |
| 5535 | serves several purposes: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5536 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5537 | - the same features can be used for other OS or standalone |
| 5538 | applications (for instance: using compressed images to reduce the |
| 5539 | Flash memory footprint) |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5540 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5541 | - it becomes much easier to port new Linux kernel versions because |
| 5542 | lots of low-level, hardware dependent stuff are done by U-Boot |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5543 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5544 | - the same Linux kernel image can now be used with different "initrd" |
| 5545 | images; of course this also means that different kernel images can |
| 5546 | be run with the same "initrd". This makes testing easier (you don't |
| 5547 | have to build a new "zImage.initrd" Linux image when you just |
| 5548 | change a file in your "initrd"). Also, a field-upgrade of the |
| 5549 | software is easier now. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5550 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5551 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5552 | Linux HOWTO: |
| 5553 | ============ |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5554 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5555 | Porting Linux to U-Boot based systems: |
| 5556 | --------------------------------------- |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5557 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5558 | U-Boot cannot save you from doing all the necessary modifications to |
| 5559 | configure the Linux device drivers for use with your target hardware |
| 5560 | (no, we don't intend to provide a full virtual machine interface to |
| 5561 | Linux :-). |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5562 | |
Stefan Roese | 88fbf93 | 2010-04-15 16:07:28 +0200 | [diff] [blame] | 5563 | But now you can ignore ALL boot loader code (in arch/powerpc/mbxboot). |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5564 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5565 | Just make sure your machine specific header file (for instance |
| 5566 | include/asm-ppc/tqm8xx.h) includes the same definition of the Board |
Markus Heidelberg | 4716757 | 2008-09-07 20:18:27 +0200 | [diff] [blame] | 5567 | Information structure as we define in include/asm-<arch>/u-boot.h, |
| 5568 | and make sure that your definition of IMAP_ADDR uses the same value |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 5569 | as your U-Boot configuration in CONFIG_SYS_IMMR. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5570 | |
Simon Glass | d097e59 | 2014-06-11 23:29:46 -0600 | [diff] [blame] | 5571 | Note that U-Boot now has a driver model, a unified model for drivers. |
| 5572 | If you are adding a new driver, plumb it into driver model. If there |
| 5573 | is no uclass available, you are encouraged to create one. See |
| 5574 | doc/driver-model. |
| 5575 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5576 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5577 | Configuring the Linux kernel: |
| 5578 | ----------------------------- |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5579 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5580 | No specific requirements for U-Boot. Make sure you have some root |
| 5581 | device (initial ramdisk, NFS) for your target system. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5582 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5583 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5584 | Building a Linux Image: |
| 5585 | ----------------------- |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5586 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5587 | With U-Boot, "normal" build targets like "zImage" or "bzImage" are |
| 5588 | not used. If you use recent kernel source, a new build target |
| 5589 | "uImage" will exist which automatically builds an image usable by |
| 5590 | U-Boot. Most older kernels also have support for a "pImage" target, |
| 5591 | which was introduced for our predecessor project PPCBoot and uses a |
| 5592 | 100% compatible format. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5593 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5594 | Example: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5595 | |
Holger Freyther | 7ba4e57 | 2014-08-04 09:26:05 +0200 | [diff] [blame] | 5596 | make TQM850L_defconfig |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5597 | make oldconfig |
| 5598 | make dep |
| 5599 | make uImage |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5600 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5601 | The "uImage" build target uses a special tool (in 'tools/mkimage') to |
| 5602 | encapsulate a compressed Linux kernel image with header information, |
| 5603 | CRC32 checksum etc. for use with U-Boot. This is what we are doing: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5604 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5605 | * build a standard "vmlinux" kernel image (in ELF binary format): |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5606 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5607 | * convert the kernel into a raw binary image: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5608 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5609 | ${CROSS_COMPILE}-objcopy -O binary \ |
| 5610 | -R .note -R .comment \ |
| 5611 | -S vmlinux linux.bin |
wdenk | 24ee89b | 2002-11-03 17:56:27 +0000 | [diff] [blame] | 5612 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5613 | * compress the binary image: |
wdenk | 24ee89b | 2002-11-03 17:56:27 +0000 | [diff] [blame] | 5614 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5615 | gzip -9 linux.bin |
wdenk | 24ee89b | 2002-11-03 17:56:27 +0000 | [diff] [blame] | 5616 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5617 | * package compressed binary image for U-Boot: |
wdenk | 24ee89b | 2002-11-03 17:56:27 +0000 | [diff] [blame] | 5618 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5619 | mkimage -A ppc -O linux -T kernel -C gzip \ |
| 5620 | -a 0 -e 0 -n "Linux Kernel Image" \ |
| 5621 | -d linux.bin.gz uImage |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5622 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5623 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5624 | The "mkimage" tool can also be used to create ramdisk images for use |
| 5625 | with U-Boot, either separated from the Linux kernel image, or |
| 5626 | combined into one file. "mkimage" encapsulates the images with a 64 |
| 5627 | byte header containing information about target architecture, |
| 5628 | operating system, image type, compression method, entry points, time |
| 5629 | stamp, CRC32 checksums, etc. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5630 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5631 | "mkimage" can be called in two ways: to verify existing images and |
| 5632 | print the header information, or to build new images. |
wdenk | 24ee89b | 2002-11-03 17:56:27 +0000 | [diff] [blame] | 5633 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5634 | In the first form (with "-l" option) mkimage lists the information |
| 5635 | contained in the header of an existing U-Boot image; this includes |
| 5636 | checksum verification: |
wdenk | 24ee89b | 2002-11-03 17:56:27 +0000 | [diff] [blame] | 5637 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5638 | tools/mkimage -l image |
| 5639 | -l ==> list image header information |
wdenk | 24ee89b | 2002-11-03 17:56:27 +0000 | [diff] [blame] | 5640 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5641 | The second form (with "-d" option) is used to build a U-Boot image |
| 5642 | from a "data file" which is used as image payload: |
wdenk | 24ee89b | 2002-11-03 17:56:27 +0000 | [diff] [blame] | 5643 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5644 | tools/mkimage -A arch -O os -T type -C comp -a addr -e ep \ |
| 5645 | -n name -d data_file image |
| 5646 | -A ==> set architecture to 'arch' |
| 5647 | -O ==> set operating system to 'os' |
| 5648 | -T ==> set image type to 'type' |
| 5649 | -C ==> set compression type 'comp' |
| 5650 | -a ==> set load address to 'addr' (hex) |
| 5651 | -e ==> set entry point to 'ep' (hex) |
| 5652 | -n ==> set image name to 'name' |
| 5653 | -d ==> use image data from 'datafile' |
wdenk | 24ee89b | 2002-11-03 17:56:27 +0000 | [diff] [blame] | 5654 | |
wdenk | cd91445 | 2004-05-29 16:53:29 +0000 | [diff] [blame] | 5655 | Right now, all Linux kernels for PowerPC systems use the same load |
| 5656 | address (0x00000000), but the entry point address depends on the |
| 5657 | kernel version: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5658 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5659 | - 2.2.x kernels have the entry point at 0x0000000C, |
| 5660 | - 2.3.x and later kernels have the entry point at 0x00000000. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5661 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5662 | So a typical call to build a U-Boot image would read: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5663 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5664 | -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ |
| 5665 | > -A ppc -O linux -T kernel -C gzip -a 0 -e 0 \ |
Stefan Roese | 88fbf93 | 2010-04-15 16:07:28 +0200 | [diff] [blame] | 5666 | > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz \ |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5667 | > examples/uImage.TQM850L |
| 5668 | Image Name: 2.4.4 kernel for TQM850L |
| 5669 | Created: Wed Jul 19 02:34:59 2000 |
| 5670 | Image Type: PowerPC Linux Kernel Image (gzip compressed) |
| 5671 | Data Size: 335725 Bytes = 327.86 kB = 0.32 MB |
| 5672 | Load Address: 0x00000000 |
| 5673 | Entry Point: 0x00000000 |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5674 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5675 | To verify the contents of the image (or check for corruption): |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5676 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5677 | -> tools/mkimage -l examples/uImage.TQM850L |
| 5678 | Image Name: 2.4.4 kernel for TQM850L |
| 5679 | Created: Wed Jul 19 02:34:59 2000 |
| 5680 | Image Type: PowerPC Linux Kernel Image (gzip compressed) |
| 5681 | Data Size: 335725 Bytes = 327.86 kB = 0.32 MB |
| 5682 | Load Address: 0x00000000 |
| 5683 | Entry Point: 0x00000000 |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5684 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5685 | NOTE: for embedded systems where boot time is critical you can trade |
| 5686 | speed for memory and install an UNCOMPRESSED image instead: this |
| 5687 | needs more space in Flash, but boots much faster since it does not |
| 5688 | need to be uncompressed: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5689 | |
Stefan Roese | 88fbf93 | 2010-04-15 16:07:28 +0200 | [diff] [blame] | 5690 | -> gunzip /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux.gz |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5691 | -> tools/mkimage -n '2.4.4 kernel for TQM850L' \ |
| 5692 | > -A ppc -O linux -T kernel -C none -a 0 -e 0 \ |
Stefan Roese | 88fbf93 | 2010-04-15 16:07:28 +0200 | [diff] [blame] | 5693 | > -d /opt/elsk/ppc_8xx/usr/src/linux-2.4.4/arch/powerpc/coffboot/vmlinux \ |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5694 | > examples/uImage.TQM850L-uncompressed |
| 5695 | Image Name: 2.4.4 kernel for TQM850L |
| 5696 | Created: Wed Jul 19 02:34:59 2000 |
| 5697 | Image Type: PowerPC Linux Kernel Image (uncompressed) |
| 5698 | Data Size: 792160 Bytes = 773.59 kB = 0.76 MB |
| 5699 | Load Address: 0x00000000 |
| 5700 | Entry Point: 0x00000000 |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5701 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5702 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5703 | Similar you can build U-Boot images from a 'ramdisk.image.gz' file |
| 5704 | when your kernel is intended to use an initial ramdisk: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5705 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5706 | -> tools/mkimage -n 'Simple Ramdisk Image' \ |
| 5707 | > -A ppc -O linux -T ramdisk -C gzip \ |
| 5708 | > -d /LinuxPPC/images/SIMPLE-ramdisk.image.gz examples/simple-initrd |
| 5709 | Image Name: Simple Ramdisk Image |
| 5710 | Created: Wed Jan 12 14:01:50 2000 |
| 5711 | Image Type: PowerPC Linux RAMDisk Image (gzip compressed) |
| 5712 | Data Size: 566530 Bytes = 553.25 kB = 0.54 MB |
| 5713 | Load Address: 0x00000000 |
| 5714 | Entry Point: 0x00000000 |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5715 | |
Guilherme Maciel Ferreira | 5155381 | 2013-12-01 12:43:11 -0700 | [diff] [blame] | 5716 | The "dumpimage" is a tool to disassemble images built by mkimage. Its "-i" |
| 5717 | option performs the converse operation of the mkimage's second form (the "-d" |
| 5718 | option). Given an image built by mkimage, the dumpimage extracts a "data file" |
| 5719 | from the image: |
| 5720 | |
Guilherme Maciel Ferreira | 40bf563 | 2015-01-15 02:54:40 -0200 | [diff] [blame] | 5721 | tools/dumpimage -i image -T type -p position data_file |
| 5722 | -i ==> extract from the 'image' a specific 'data_file' |
| 5723 | -T ==> set image type to 'type' |
| 5724 | -p ==> 'position' (starting at 0) of the 'data_file' inside the 'image' |
Guilherme Maciel Ferreira | 5155381 | 2013-12-01 12:43:11 -0700 | [diff] [blame] | 5725 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5726 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5727 | Installing a Linux Image: |
| 5728 | ------------------------- |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5729 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5730 | To downloading a U-Boot image over the serial (console) interface, |
| 5731 | you must convert the image to S-Record format: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5732 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5733 | objcopy -I binary -O srec examples/image examples/image.srec |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5734 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5735 | The 'objcopy' does not understand the information in the U-Boot |
| 5736 | image header, so the resulting S-Record file will be relative to |
| 5737 | address 0x00000000. To load it to a given address, you need to |
| 5738 | specify the target address as 'offset' parameter with the 'loads' |
| 5739 | command. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5740 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5741 | Example: install the image to address 0x40100000 (which on the |
| 5742 | TQM8xxL is in the first Flash bank): |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5743 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5744 | => erase 40100000 401FFFFF |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5745 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5746 | .......... done |
| 5747 | Erased 8 sectors |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5748 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5749 | => loads 40100000 |
| 5750 | ## Ready for S-Record download ... |
| 5751 | ~>examples/image.srec |
| 5752 | 1 2 3 4 5 6 7 8 9 10 11 12 13 ... |
| 5753 | ... |
| 5754 | 15989 15990 15991 15992 |
| 5755 | [file transfer complete] |
| 5756 | [connected] |
| 5757 | ## Start Addr = 0x00000000 |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5758 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5759 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5760 | You can check the success of the download using the 'iminfo' command; |
Wolfgang Denk | b240aef | 2008-03-26 10:40:12 +0100 | [diff] [blame] | 5761 | this includes a checksum verification so you can be sure no data |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5762 | corruption happened: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5763 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5764 | => imi 40100000 |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5765 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5766 | ## Checking Image at 40100000 ... |
| 5767 | Image Name: 2.2.13 for initrd on TQM850L |
| 5768 | Image Type: PowerPC Linux Kernel Image (gzip compressed) |
| 5769 | Data Size: 335725 Bytes = 327 kB = 0 MB |
| 5770 | Load Address: 00000000 |
| 5771 | Entry Point: 0000000c |
| 5772 | Verifying Checksum ... OK |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5773 | |
| 5774 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5775 | Boot Linux: |
| 5776 | ----------- |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5777 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5778 | The "bootm" command is used to boot an application that is stored in |
| 5779 | memory (RAM or Flash). In case of a Linux kernel image, the contents |
| 5780 | of the "bootargs" environment variable is passed to the kernel as |
| 5781 | parameters. You can check and modify this variable using the |
| 5782 | "printenv" and "setenv" commands: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5783 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5784 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5785 | => printenv bootargs |
| 5786 | bootargs=root=/dev/ram |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5787 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5788 | => setenv bootargs root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5789 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5790 | => printenv bootargs |
| 5791 | bootargs=root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5792 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5793 | => bootm 40020000 |
| 5794 | ## Booting Linux kernel at 40020000 ... |
| 5795 | Image Name: 2.2.13 for NFS on TQM850L |
| 5796 | Image Type: PowerPC Linux Kernel Image (gzip compressed) |
| 5797 | Data Size: 381681 Bytes = 372 kB = 0 MB |
| 5798 | Load Address: 00000000 |
| 5799 | Entry Point: 0000000c |
| 5800 | Verifying Checksum ... OK |
| 5801 | Uncompressing Kernel Image ... OK |
| 5802 | Linux version 2.2.13 (wd@denx.local.net) (gcc version 2.95.2 19991024 (release)) #1 Wed Jul 19 02:35:17 MEST 2000 |
| 5803 | Boot arguments: root=/dev/nfs rw nfsroot=10.0.0.2:/LinuxPPC nfsaddrs=10.0.0.99:10.0.0.2 |
| 5804 | time_init: decrementer frequency = 187500000/60 |
| 5805 | Calibrating delay loop... 49.77 BogoMIPS |
| 5806 | Memory: 15208k available (700k kernel code, 444k data, 32k init) [c0000000,c1000000] |
| 5807 | ... |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5808 | |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 5809 | If you want to boot a Linux kernel with initial RAM disk, you pass |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5810 | the memory addresses of both the kernel and the initrd image (PPBCOOT |
| 5811 | format!) to the "bootm" command: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5812 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5813 | => imi 40100000 40200000 |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5814 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5815 | ## Checking Image at 40100000 ... |
| 5816 | Image Name: 2.2.13 for initrd on TQM850L |
| 5817 | Image Type: PowerPC Linux Kernel Image (gzip compressed) |
| 5818 | Data Size: 335725 Bytes = 327 kB = 0 MB |
| 5819 | Load Address: 00000000 |
| 5820 | Entry Point: 0000000c |
| 5821 | Verifying Checksum ... OK |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5822 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5823 | ## Checking Image at 40200000 ... |
| 5824 | Image Name: Simple Ramdisk Image |
| 5825 | Image Type: PowerPC Linux RAMDisk Image (gzip compressed) |
| 5826 | Data Size: 566530 Bytes = 553 kB = 0 MB |
| 5827 | Load Address: 00000000 |
| 5828 | Entry Point: 00000000 |
| 5829 | Verifying Checksum ... OK |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5830 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5831 | => bootm 40100000 40200000 |
| 5832 | ## Booting Linux kernel at 40100000 ... |
| 5833 | Image Name: 2.2.13 for initrd on TQM850L |
| 5834 | Image Type: PowerPC Linux Kernel Image (gzip compressed) |
| 5835 | Data Size: 335725 Bytes = 327 kB = 0 MB |
| 5836 | Load Address: 00000000 |
| 5837 | Entry Point: 0000000c |
| 5838 | Verifying Checksum ... OK |
| 5839 | Uncompressing Kernel Image ... OK |
| 5840 | ## Loading RAMDisk Image at 40200000 ... |
| 5841 | Image Name: Simple Ramdisk Image |
| 5842 | Image Type: PowerPC Linux RAMDisk Image (gzip compressed) |
| 5843 | Data Size: 566530 Bytes = 553 kB = 0 MB |
| 5844 | Load Address: 00000000 |
| 5845 | Entry Point: 00000000 |
| 5846 | Verifying Checksum ... OK |
| 5847 | Loading Ramdisk ... OK |
| 5848 | Linux version 2.2.13 (wd@denx.local.net) (gcc version 2.95.2 19991024 (release)) #1 Wed Jul 19 02:32:08 MEST 2000 |
| 5849 | Boot arguments: root=/dev/ram |
| 5850 | time_init: decrementer frequency = 187500000/60 |
| 5851 | Calibrating delay loop... 49.77 BogoMIPS |
| 5852 | ... |
| 5853 | RAMDISK: Compressed image found at block 0 |
| 5854 | VFS: Mounted root (ext2 filesystem). |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5855 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5856 | bash# |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5857 | |
Matthew McClintock | efae4ca | 2006-06-28 10:41:37 -0500 | [diff] [blame] | 5858 | Boot Linux and pass a flat device tree: |
| 5859 | ----------- |
| 5860 | |
| 5861 | First, U-Boot must be compiled with the appropriate defines. See the section |
| 5862 | titled "Linux Kernel Interface" above for a more in depth explanation. The |
| 5863 | following is an example of how to start a kernel and pass an updated |
| 5864 | flat device tree: |
| 5865 | |
| 5866 | => print oftaddr |
| 5867 | oftaddr=0x300000 |
| 5868 | => print oft |
| 5869 | oft=oftrees/mpc8540ads.dtb |
| 5870 | => tftp $oftaddr $oft |
| 5871 | Speed: 1000, full duplex |
| 5872 | Using TSEC0 device |
| 5873 | TFTP from server 192.168.1.1; our IP address is 192.168.1.101 |
| 5874 | Filename 'oftrees/mpc8540ads.dtb'. |
| 5875 | Load address: 0x300000 |
| 5876 | Loading: # |
| 5877 | done |
| 5878 | Bytes transferred = 4106 (100a hex) |
| 5879 | => tftp $loadaddr $bootfile |
| 5880 | Speed: 1000, full duplex |
| 5881 | Using TSEC0 device |
| 5882 | TFTP from server 192.168.1.1; our IP address is 192.168.1.2 |
| 5883 | Filename 'uImage'. |
| 5884 | Load address: 0x200000 |
| 5885 | Loading:############ |
| 5886 | done |
| 5887 | Bytes transferred = 1029407 (fb51f hex) |
| 5888 | => print loadaddr |
| 5889 | loadaddr=200000 |
| 5890 | => print oftaddr |
| 5891 | oftaddr=0x300000 |
| 5892 | => bootm $loadaddr - $oftaddr |
| 5893 | ## Booting image at 00200000 ... |
Wolfgang Denk | 018147d | 2006-11-27 15:32:42 +0100 | [diff] [blame] | 5894 | Image Name: Linux-2.6.17-dirty |
| 5895 | Image Type: PowerPC Linux Kernel Image (gzip compressed) |
| 5896 | Data Size: 1029343 Bytes = 1005.2 kB |
Matthew McClintock | efae4ca | 2006-06-28 10:41:37 -0500 | [diff] [blame] | 5897 | Load Address: 00000000 |
Wolfgang Denk | 018147d | 2006-11-27 15:32:42 +0100 | [diff] [blame] | 5898 | Entry Point: 00000000 |
Matthew McClintock | efae4ca | 2006-06-28 10:41:37 -0500 | [diff] [blame] | 5899 | Verifying Checksum ... OK |
| 5900 | Uncompressing Kernel Image ... OK |
| 5901 | Booting using flat device tree at 0x300000 |
| 5902 | Using MPC85xx ADS machine description |
| 5903 | Memory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb |
| 5904 | [snip] |
| 5905 | |
| 5906 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5907 | More About U-Boot Image Types: |
| 5908 | ------------------------------ |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5909 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5910 | U-Boot supports the following image types: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5911 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5912 | "Standalone Programs" are directly runnable in the environment |
| 5913 | provided by U-Boot; it is expected that (if they behave |
| 5914 | well) you can continue to work in U-Boot after return from |
| 5915 | the Standalone Program. |
| 5916 | "OS Kernel Images" are usually images of some Embedded OS which |
| 5917 | will take over control completely. Usually these programs |
| 5918 | will install their own set of exception handlers, device |
| 5919 | drivers, set up the MMU, etc. - this means, that you cannot |
| 5920 | expect to re-enter U-Boot except by resetting the CPU. |
| 5921 | "RAMDisk Images" are more or less just data blocks, and their |
| 5922 | parameters (address, size) are passed to an OS kernel that is |
| 5923 | being started. |
| 5924 | "Multi-File Images" contain several images, typically an OS |
| 5925 | (Linux) kernel image and one or more data images like |
| 5926 | RAMDisks. This construct is useful for instance when you want |
| 5927 | to boot over the network using BOOTP etc., where the boot |
| 5928 | server provides just a single image file, but you want to get |
| 5929 | for instance an OS kernel and a RAMDisk image. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5930 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5931 | "Multi-File Images" start with a list of image sizes, each |
| 5932 | image size (in bytes) specified by an "uint32_t" in network |
| 5933 | byte order. This list is terminated by an "(uint32_t)0". |
| 5934 | Immediately after the terminating 0 follow the images, one by |
| 5935 | one, all aligned on "uint32_t" boundaries (size rounded up to |
| 5936 | a multiple of 4 bytes). |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5937 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5938 | "Firmware Images" are binary images containing firmware (like |
| 5939 | U-Boot or FPGA images) which usually will be programmed to |
| 5940 | flash memory. |
wdenk | 4fc9569 | 2003-02-28 00:49:47 +0000 | [diff] [blame] | 5941 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5942 | "Script files" are command sequences that will be executed by |
| 5943 | U-Boot's command interpreter; this feature is especially |
| 5944 | useful when you configure U-Boot to use a real shell (hush) |
| 5945 | as command interpreter. |
wdenk | 4fc9569 | 2003-02-28 00:49:47 +0000 | [diff] [blame] | 5946 | |
Marek Vasut | cf41a9b | 2012-03-14 21:52:45 +0000 | [diff] [blame] | 5947 | Booting the Linux zImage: |
| 5948 | ------------------------- |
| 5949 | |
| 5950 | On some platforms, it's possible to boot Linux zImage. This is done |
| 5951 | using the "bootz" command. The syntax of "bootz" command is the same |
| 5952 | as the syntax of "bootm" command. |
| 5953 | |
Tom Rini | 45f46d1 | 2013-05-16 11:40:11 -0400 | [diff] [blame] | 5954 | Note, defining the CONFIG_SUPPORT_RAW_INITRD allows user to supply |
Marek Vasut | 28850d0 | 2012-03-18 11:47:58 +0000 | [diff] [blame] | 5955 | kernel with raw initrd images. The syntax is slightly different, the |
| 5956 | address of the initrd must be augmented by it's size, in the following |
| 5957 | format: "<initrd addres>:<initrd size>". |
| 5958 | |
stroese | b9c17c5 | 2003-04-04 15:53:41 +0000 | [diff] [blame] | 5959 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5960 | Standalone HOWTO: |
| 5961 | ================= |
stroese | b9c17c5 | 2003-04-04 15:53:41 +0000 | [diff] [blame] | 5962 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5963 | One of the features of U-Boot is that you can dynamically load and |
| 5964 | run "standalone" applications, which can use some resources of |
| 5965 | U-Boot like console I/O functions or interrupt services. |
stroese | b9c17c5 | 2003-04-04 15:53:41 +0000 | [diff] [blame] | 5966 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5967 | Two simple examples are included with the sources: |
wdenk | 4fc9569 | 2003-02-28 00:49:47 +0000 | [diff] [blame] | 5968 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5969 | "Hello World" Demo: |
| 5970 | ------------------- |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5971 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5972 | 'examples/hello_world.c' contains a small "Hello World" Demo |
| 5973 | application; it is automatically compiled when you build U-Boot. |
| 5974 | It's configured to run at address 0x00040004, so you can play with it |
| 5975 | like that: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5976 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5977 | => loads |
| 5978 | ## Ready for S-Record download ... |
| 5979 | ~>examples/hello_world.srec |
| 5980 | 1 2 3 4 5 6 7 8 9 10 11 ... |
| 5981 | [file transfer complete] |
| 5982 | [connected] |
| 5983 | ## Start Addr = 0x00040004 |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5984 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5985 | => go 40004 Hello World! This is a test. |
| 5986 | ## Starting application at 0x00040004 ... |
| 5987 | Hello World |
| 5988 | argc = 7 |
| 5989 | argv[0] = "40004" |
| 5990 | argv[1] = "Hello" |
| 5991 | argv[2] = "World!" |
| 5992 | argv[3] = "This" |
| 5993 | argv[4] = "is" |
| 5994 | argv[5] = "a" |
| 5995 | argv[6] = "test." |
| 5996 | argv[7] = "<NULL>" |
| 5997 | Hit any key to exit ... |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 5998 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 5999 | ## Application terminated, rc = 0x0 |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6000 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6001 | Another example, which demonstrates how to register a CPM interrupt |
| 6002 | handler with the U-Boot code, can be found in 'examples/timer.c'. |
| 6003 | Here, a CPM timer is set up to generate an interrupt every second. |
| 6004 | The interrupt service routine is trivial, just printing a '.' |
| 6005 | character, but this is just a demo program. The application can be |
| 6006 | controlled by the following keys: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6007 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6008 | ? - print current values og the CPM Timer registers |
| 6009 | b - enable interrupts and start timer |
| 6010 | e - stop timer and disable interrupts |
| 6011 | q - quit application |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6012 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6013 | => loads |
| 6014 | ## Ready for S-Record download ... |
| 6015 | ~>examples/timer.srec |
| 6016 | 1 2 3 4 5 6 7 8 9 10 11 ... |
| 6017 | [file transfer complete] |
| 6018 | [connected] |
| 6019 | ## Start Addr = 0x00040004 |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6020 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6021 | => go 40004 |
| 6022 | ## Starting application at 0x00040004 ... |
| 6023 | TIMERS=0xfff00980 |
| 6024 | Using timer 1 |
| 6025 | tgcr @ 0xfff00980, tmr @ 0xfff00990, trr @ 0xfff00994, tcr @ 0xfff00998, tcn @ 0xfff0099c, ter @ 0xfff009b0 |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6026 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6027 | Hit 'b': |
| 6028 | [q, b, e, ?] Set interval 1000000 us |
| 6029 | Enabling timer |
| 6030 | Hit '?': |
| 6031 | [q, b, e, ?] ........ |
| 6032 | tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0xef6, ter=0x0 |
| 6033 | Hit '?': |
| 6034 | [q, b, e, ?] . |
| 6035 | tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x2ad4, ter=0x0 |
| 6036 | Hit '?': |
| 6037 | [q, b, e, ?] . |
| 6038 | tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x1efc, ter=0x0 |
| 6039 | Hit '?': |
| 6040 | [q, b, e, ?] . |
| 6041 | tgcr=0x1, tmr=0xff1c, trr=0x3d09, tcr=0x0, tcn=0x169d, ter=0x0 |
| 6042 | Hit 'e': |
| 6043 | [q, b, e, ?] ...Stopping timer |
| 6044 | Hit 'q': |
| 6045 | [q, b, e, ?] ## Application terminated, rc = 0x0 |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6046 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6047 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6048 | Minicom warning: |
| 6049 | ================ |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6050 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6051 | Over time, many people have reported problems when trying to use the |
| 6052 | "minicom" terminal emulation program for serial download. I (wd) |
| 6053 | consider minicom to be broken, and recommend not to use it. Under |
| 6054 | Unix, I recommend to use C-Kermit for general purpose use (and |
| 6055 | especially for kermit binary protocol download ("loadb" command), and |
Karl O. Pinc | a0189bb | 2012-10-01 05:11:56 +0000 | [diff] [blame] | 6056 | use "cu" for S-Record download ("loads" command). See |
| 6057 | http://www.denx.de/wiki/view/DULG/SystemSetup#Section_4.3. |
| 6058 | for help with kermit. |
| 6059 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6060 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6061 | Nevertheless, if you absolutely want to use it try adding this |
| 6062 | configuration to your "File transfer protocols" section: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6063 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6064 | Name Program Name U/D FullScr IO-Red. Multi |
| 6065 | X kermit /usr/bin/kermit -i -l %l -s Y U Y N N |
| 6066 | Y kermit /usr/bin/kermit -i -l %l -r N D Y N N |
wdenk | 8dba050 | 2003-03-31 16:34:49 +0000 | [diff] [blame] | 6067 | |
wdenk | 8dba050 | 2003-03-31 16:34:49 +0000 | [diff] [blame] | 6068 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6069 | NetBSD Notes: |
| 6070 | ============= |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6071 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6072 | Starting at version 0.9.2, U-Boot supports NetBSD both as host |
| 6073 | (build U-Boot) and target system (boots NetBSD/mpc8xx). |
wdenk | 88e72a3 | 2003-06-19 23:04:19 +0000 | [diff] [blame] | 6074 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6075 | Building requires a cross environment; it is known to work on |
| 6076 | NetBSD/i386 with the cross-powerpc-netbsd-1.3 package (you will also |
| 6077 | need gmake since the Makefiles are not compatible with BSD make). |
| 6078 | Note that the cross-powerpc package does not install include files; |
| 6079 | attempting to build U-Boot will fail because <machine/ansi.h> is |
| 6080 | missing. This file has to be installed and patched manually: |
wdenk | 88e72a3 | 2003-06-19 23:04:19 +0000 | [diff] [blame] | 6081 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6082 | # cd /usr/pkg/cross/powerpc-netbsd/include |
| 6083 | # mkdir powerpc |
| 6084 | # ln -s powerpc machine |
| 6085 | # cp /usr/src/sys/arch/powerpc/include/ansi.h powerpc/ansi.h |
| 6086 | # ${EDIT} powerpc/ansi.h ## must remove __va_list, _BSD_VA_LIST |
wdenk | 88e72a3 | 2003-06-19 23:04:19 +0000 | [diff] [blame] | 6087 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6088 | Native builds *don't* work due to incompatibilities between native |
| 6089 | and U-Boot include files. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6090 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6091 | Booting assumes that (the first part of) the image booted is a |
| 6092 | stage-2 loader which in turn loads and then invokes the kernel |
| 6093 | proper. Loader sources will eventually appear in the NetBSD source |
| 6094 | tree (probably in sys/arc/mpc8xx/stand/u-boot_stage2/); in the |
wdenk | d0245fc | 2005-04-13 10:02:42 +0000 | [diff] [blame] | 6095 | meantime, see ftp://ftp.denx.de/pub/u-boot/ppcboot_stage2.tar.gz |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6096 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6097 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6098 | Implementation Internals: |
| 6099 | ========================= |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6100 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6101 | The following is not intended to be a complete description of every |
| 6102 | implementation detail. However, it should help to understand the |
| 6103 | inner workings of U-Boot and make it easier to port it to custom |
| 6104 | hardware. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6105 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6106 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6107 | Initial Stack, Global Data: |
| 6108 | --------------------------- |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6109 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6110 | The implementation of U-Boot is complicated by the fact that U-Boot |
| 6111 | starts running out of ROM (flash memory), usually without access to |
| 6112 | system RAM (because the memory controller is not initialized yet). |
| 6113 | This means that we don't have writable Data or BSS segments, and BSS |
| 6114 | is not initialized as zero. To be able to get a C environment working |
| 6115 | at all, we have to allocate at least a minimal stack. Implementation |
| 6116 | options for this are defined and restricted by the CPU used: Some CPU |
| 6117 | models provide on-chip memory (like the IMMR area on MPC8xx and |
| 6118 | MPC826x processors), on others (parts of) the data cache can be |
| 6119 | locked as (mis-) used as memory, etc. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6120 | |
Wolfgang Denk | b240aef | 2008-03-26 10:40:12 +0100 | [diff] [blame] | 6121 | Chris Hallinan posted a good summary of these issues to the |
Wolfgang Denk | 290ae6b | 2008-12-30 22:56:11 +0100 | [diff] [blame] | 6122 | U-Boot mailing list: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6123 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6124 | Subject: RE: [U-Boot-Users] RE: More On Memory Bank x (nothingness)? |
| 6125 | From: "Chris Hallinan" <clh@net1plus.com> |
| 6126 | Date: Mon, 10 Feb 2003 16:43:46 -0500 (22:43 MET) |
| 6127 | ... |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6128 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6129 | Correct me if I'm wrong, folks, but the way I understand it |
| 6130 | is this: Using DCACHE as initial RAM for Stack, etc, does not |
| 6131 | require any physical RAM backing up the cache. The cleverness |
| 6132 | is that the cache is being used as a temporary supply of |
| 6133 | necessary storage before the SDRAM controller is setup. It's |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 6134 | beyond the scope of this list to explain the details, but you |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6135 | can see how this works by studying the cache architecture and |
| 6136 | operation in the architecture and processor-specific manuals. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6137 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6138 | OCM is On Chip Memory, which I believe the 405GP has 4K. It |
| 6139 | is another option for the system designer to use as an |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 6140 | initial stack/RAM area prior to SDRAM being available. Either |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6141 | option should work for you. Using CS 4 should be fine if your |
| 6142 | board designers haven't used it for something that would |
| 6143 | cause you grief during the initial boot! It is frequently not |
| 6144 | used. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6145 | |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 6146 | CONFIG_SYS_INIT_RAM_ADDR should be somewhere that won't interfere |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6147 | with your processor/board/system design. The default value |
| 6148 | you will find in any recent u-boot distribution in |
Stefan Roese | 3e1f1b3 | 2005-08-01 16:49:12 +0200 | [diff] [blame] | 6149 | walnut.h should work for you. I'd set it to a value larger |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6150 | than your SDRAM module. If you have a 64MB SDRAM module, set |
| 6151 | it above 400_0000. Just make sure your board has no resources |
| 6152 | that are supposed to respond to that address! That code in |
| 6153 | start.S has been around a while and should work as is when |
| 6154 | you get the config right. |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 6155 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6156 | -Chris Hallinan |
| 6157 | DS4.COM, Inc. |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 6158 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6159 | It is essential to remember this, since it has some impact on the C |
| 6160 | code for the initialization procedures: |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 6161 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6162 | * Initialized global data (data segment) is read-only. Do not attempt |
| 6163 | to write it. |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 6164 | |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 6165 | * Do not use any uninitialized global data (or implicitly initialized |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6166 | as zero data - BSS segment) at all - this is undefined, initiali- |
| 6167 | zation is performed later (when relocating to RAM). |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 6168 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6169 | * Stack space is very limited. Avoid big data buffers or things like |
| 6170 | that. |
wdenk | 4a5c8a7 | 2003-03-06 00:02:04 +0000 | [diff] [blame] | 6171 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6172 | Having only the stack as writable memory limits means we cannot use |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 6173 | normal global data to share information between the code. But it |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6174 | turned out that the implementation of U-Boot can be greatly |
| 6175 | simplified by making a global data structure (gd_t) available to all |
| 6176 | functions. We could pass a pointer to this data as argument to _all_ |
| 6177 | functions, but this would bloat the code. Instead we use a feature of |
| 6178 | the GCC compiler (Global Register Variables) to share the data: we |
| 6179 | place a pointer (gd) to the global data into a register which we |
| 6180 | reserve for this purpose. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6181 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6182 | When choosing a register for such a purpose we are restricted by the |
| 6183 | relevant (E)ABI specifications for the current architecture, and by |
| 6184 | GCC's implementation. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6185 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6186 | For PowerPC, the following registers have specific use: |
| 6187 | R1: stack pointer |
Wolfgang Denk | 69c0964 | 2008-02-14 22:43:22 +0100 | [diff] [blame] | 6188 | R2: reserved for system use |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6189 | R3-R4: parameter passing and return values |
| 6190 | R5-R10: parameter passing |
| 6191 | R13: small data area pointer |
| 6192 | R30: GOT pointer |
| 6193 | R31: frame pointer |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6194 | |
Joakim Tjernlund | 693c0c1 | 2010-01-19 14:41:58 +0100 | [diff] [blame] | 6195 | (U-Boot also uses R12 as internal GOT pointer. r12 |
| 6196 | is a volatile register so r12 needs to be reset when |
| 6197 | going back and forth between asm and C) |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6198 | |
Wolfgang Denk | 69c0964 | 2008-02-14 22:43:22 +0100 | [diff] [blame] | 6199 | ==> U-Boot will use R2 to hold a pointer to the global data |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6200 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6201 | Note: on PPC, we could use a static initializer (since the |
| 6202 | address of the global data structure is known at compile time), |
| 6203 | but it turned out that reserving a register results in somewhat |
| 6204 | smaller code - although the code savings are not that big (on |
| 6205 | average for all boards 752 bytes for the whole U-Boot image, |
| 6206 | 624 text + 127 data). |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6207 | |
Robin Getz | 2773d5f | 2009-08-17 15:23:02 +0000 | [diff] [blame] | 6208 | On Blackfin, the normal C ABI (except for P3) is followed as documented here: |
Mike Frysinger | 60f0930 | 2008-02-04 19:26:54 -0500 | [diff] [blame] | 6209 | http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface |
| 6210 | |
Robin Getz | 2773d5f | 2009-08-17 15:23:02 +0000 | [diff] [blame] | 6211 | ==> U-Boot will use P3 to hold a pointer to the global data |
Mike Frysinger | 60f0930 | 2008-02-04 19:26:54 -0500 | [diff] [blame] | 6212 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6213 | On ARM, the following registers are used: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6214 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6215 | R0: function argument word/integer result |
| 6216 | R1-R3: function argument word |
Jeroen Hofstee | a556aca | 2013-09-21 14:04:42 +0200 | [diff] [blame] | 6217 | R9: platform specific |
| 6218 | R10: stack limit (used only if stack checking is enabled) |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6219 | R11: argument (frame) pointer |
| 6220 | R12: temporary workspace |
| 6221 | R13: stack pointer |
| 6222 | R14: link register |
| 6223 | R15: program counter |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6224 | |
Jeroen Hofstee | a556aca | 2013-09-21 14:04:42 +0200 | [diff] [blame] | 6225 | ==> U-Boot will use R9 to hold a pointer to the global data |
| 6226 | |
| 6227 | Note: on ARM, only R_ARM_RELATIVE relocations are supported. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6228 | |
Thomas Chou | 8fa3858 | 2010-05-21 11:08:03 +0800 | [diff] [blame] | 6229 | On Nios II, the ABI is documented here: |
| 6230 | http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf |
| 6231 | |
| 6232 | ==> U-Boot will use gp to hold a pointer to the global data |
| 6233 | |
| 6234 | Note: on Nios II, we give "-G0" option to gcc and don't use gp |
| 6235 | to access small data sections, so gp is free. |
| 6236 | |
Macpaul Lin | 1cac36e | 2011-10-19 20:41:11 +0000 | [diff] [blame] | 6237 | On NDS32, the following registers are used: |
| 6238 | |
| 6239 | R0-R1: argument/return |
| 6240 | R2-R5: argument |
| 6241 | R15: temporary register for assembler |
| 6242 | R16: trampoline register |
| 6243 | R28: frame pointer (FP) |
| 6244 | R29: global pointer (GP) |
| 6245 | R30: link register (LP) |
| 6246 | R31: stack pointer (SP) |
| 6247 | PC: program counter (PC) |
| 6248 | |
| 6249 | ==> U-Boot will use R10 to hold a pointer to the global data |
| 6250 | |
Wolfgang Denk | 6405a15 | 2006-03-31 18:32:53 +0200 | [diff] [blame] | 6251 | NOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope, |
| 6252 | or current versions of GCC may "optimize" the code too much. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6253 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6254 | Memory Management: |
| 6255 | ------------------ |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6256 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6257 | U-Boot runs in system state and uses physical addresses, i.e. the |
| 6258 | MMU is not used either for address mapping nor for memory protection. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6259 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6260 | The available memory is mapped to fixed addresses using the memory |
| 6261 | controller. In this process, a contiguous block is formed for each |
| 6262 | memory type (Flash, SDRAM, SRAM), even when it consists of several |
| 6263 | physical memory banks. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6264 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6265 | U-Boot is installed in the first 128 kB of the first Flash bank (on |
| 6266 | TQM8xxL modules this is the range 0x40000000 ... 0x4001FFFF). After |
| 6267 | booting and sizing and initializing DRAM, the code relocates itself |
| 6268 | to the upper end of DRAM. Immediately below the U-Boot code some |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 6269 | memory is reserved for use by malloc() [see CONFIG_SYS_MALLOC_LEN |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6270 | configuration setting]. Below that, a structure with global Board |
| 6271 | Info data is placed, followed by the stack (growing downward). |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6272 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6273 | Additionally, some exception handler code is copied to the low 8 kB |
| 6274 | of DRAM (0x00000000 ... 0x00001FFF). |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6275 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6276 | So a typical memory configuration with 16 MB of DRAM could look like |
| 6277 | this: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6278 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6279 | 0x0000 0000 Exception Vector code |
| 6280 | : |
| 6281 | 0x0000 1FFF |
| 6282 | 0x0000 2000 Free for Application Use |
| 6283 | : |
| 6284 | : |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6285 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6286 | : |
| 6287 | : |
| 6288 | 0x00FB FF20 Monitor Stack (Growing downward) |
| 6289 | 0x00FB FFAC Board Info Data and permanent copy of global data |
| 6290 | 0x00FC 0000 Malloc Arena |
| 6291 | : |
| 6292 | 0x00FD FFFF |
| 6293 | 0x00FE 0000 RAM Copy of Monitor Code |
| 6294 | ... eventually: LCD or video framebuffer |
| 6295 | ... eventually: pRAM (Protected RAM - unchanged by reset) |
| 6296 | 0x00FF FFFF [End of RAM] |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6297 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6298 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6299 | System Initialization: |
| 6300 | ---------------------- |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6301 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6302 | In the reset configuration, U-Boot starts at the reset entry point |
Marcel Ziswiler | abd8dcb | 2008-07-09 08:17:15 +0200 | [diff] [blame] | 6303 | (on most PowerPC systems at address 0x00000100). Because of the reset |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 6304 | configuration for CS0# this is a mirror of the on board Flash memory. |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6305 | To be able to re-map memory U-Boot then jumps to its link address. |
| 6306 | To be able to implement the initialization code in C, a (small!) |
| 6307 | initial stack is set up in the internal Dual Ported RAM (in case CPUs |
| 6308 | which provide such a feature like MPC8xx or MPC8260), or in a locked |
| 6309 | part of the data cache. After that, U-Boot initializes the CPU core, |
| 6310 | the caches and the SIU. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6311 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6312 | Next, all (potentially) available memory banks are mapped using a |
| 6313 | preliminary mapping. For example, we put them on 512 MB boundaries |
| 6314 | (multiples of 0x20000000: SDRAM on 0x00000000 and 0x20000000, Flash |
| 6315 | on 0x40000000 and 0x60000000, SRAM on 0x80000000). Then UPM A is |
| 6316 | programmed for SDRAM access. Using the temporary configuration, a |
| 6317 | simple memory test is run that determines the size of the SDRAM |
| 6318 | banks. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6319 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6320 | When there is more than one SDRAM bank, and the banks are of |
| 6321 | different size, the largest is mapped first. For equal size, the first |
| 6322 | bank (CS2#) is mapped first. The first mapping is always for address |
| 6323 | 0x00000000, with any additional banks following immediately to create |
| 6324 | contiguous memory starting from 0. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6325 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6326 | Then, the monitor installs itself at the upper end of the SDRAM area |
| 6327 | and allocates memory for use by malloc() and for the global Board |
| 6328 | Info data; also, the exception vector code is copied to the low RAM |
| 6329 | pages, and the final stack is set up. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6330 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6331 | Only after this relocation will you have a "normal" C environment; |
| 6332 | until that you are restricted in several ways, mostly because you are |
| 6333 | running from ROM, and because the code will have to be relocated to a |
| 6334 | new address in RAM. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6335 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6336 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6337 | U-Boot Porting Guide: |
| 6338 | ---------------------- |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6339 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6340 | [Based on messages by Jerry Van Baren in the U-Boot-Users mailing |
| 6341 | list, October 2002] |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6342 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6343 | |
Jerry Van Baren | ba0687c | 2009-07-15 20:42:59 -0400 | [diff] [blame] | 6344 | int main(int argc, char *argv[]) |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6345 | { |
| 6346 | sighandler_t no_more_time; |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6347 | |
Jerry Van Baren | ba0687c | 2009-07-15 20:42:59 -0400 | [diff] [blame] | 6348 | signal(SIGALRM, no_more_time); |
| 6349 | alarm(PROJECT_DEADLINE - toSec (3 * WEEK)); |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6350 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6351 | if (available_money > available_manpower) { |
Jerry Van Baren | ba0687c | 2009-07-15 20:42:59 -0400 | [diff] [blame] | 6352 | Pay consultant to port U-Boot; |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6353 | return 0; |
| 6354 | } |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6355 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6356 | Download latest U-Boot source; |
wdenk | 34b613e | 2002-12-17 01:51:00 +0000 | [diff] [blame] | 6357 | |
Wolfgang Denk | 290ae6b | 2008-12-30 22:56:11 +0100 | [diff] [blame] | 6358 | Subscribe to u-boot mailing list; |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6359 | |
Jerry Van Baren | ba0687c | 2009-07-15 20:42:59 -0400 | [diff] [blame] | 6360 | if (clueless) |
| 6361 | email("Hi, I am new to U-Boot, how do I get started?"); |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6362 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6363 | while (learning) { |
| 6364 | Read the README file in the top level directory; |
Jerry Van Baren | ba0687c | 2009-07-15 20:42:59 -0400 | [diff] [blame] | 6365 | Read http://www.denx.de/twiki/bin/view/DULG/Manual; |
| 6366 | Read applicable doc/*.README; |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6367 | Read the source, Luke; |
Jerry Van Baren | ba0687c | 2009-07-15 20:42:59 -0400 | [diff] [blame] | 6368 | /* find . -name "*.[chS]" | xargs grep -i <keyword> */ |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6369 | } |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6370 | |
Jerry Van Baren | ba0687c | 2009-07-15 20:42:59 -0400 | [diff] [blame] | 6371 | if (available_money > toLocalCurrency ($2500)) |
| 6372 | Buy a BDI3000; |
| 6373 | else |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6374 | Add a lot of aggravation and time; |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6375 | |
Jerry Van Baren | ba0687c | 2009-07-15 20:42:59 -0400 | [diff] [blame] | 6376 | if (a similar board exists) { /* hopefully... */ |
| 6377 | cp -a board/<similar> board/<myboard> |
| 6378 | cp include/configs/<similar>.h include/configs/<myboard>.h |
| 6379 | } else { |
| 6380 | Create your own board support subdirectory; |
| 6381 | Create your own board include/configs/<myboard>.h file; |
| 6382 | } |
| 6383 | Edit new board/<myboard> files |
| 6384 | Edit new include/configs/<myboard>.h |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6385 | |
Jerry Van Baren | ba0687c | 2009-07-15 20:42:59 -0400 | [diff] [blame] | 6386 | while (!accepted) { |
| 6387 | while (!running) { |
| 6388 | do { |
| 6389 | Add / modify source code; |
| 6390 | } until (compiles); |
| 6391 | Debug; |
| 6392 | if (clueless) |
| 6393 | email("Hi, I am having problems..."); |
| 6394 | } |
| 6395 | Send patch file to the U-Boot email list; |
| 6396 | if (reasonable critiques) |
| 6397 | Incorporate improvements from email list code review; |
| 6398 | else |
| 6399 | Defend code as written; |
wdenk | 634d2f7 | 2004-04-15 23:14:49 +0000 | [diff] [blame] | 6400 | } |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6401 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6402 | return 0; |
| 6403 | } |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6404 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6405 | void no_more_time (int sig) |
| 6406 | { |
| 6407 | hire_a_guru(); |
| 6408 | } |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6409 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6410 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6411 | Coding Standards: |
| 6412 | ----------------- |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6413 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6414 | All contributions to U-Boot should conform to the Linux kernel |
Detlev Zundel | aa63d48 | 2006-09-01 15:39:02 +0200 | [diff] [blame] | 6415 | coding style; see the file "Documentation/CodingStyle" and the script |
Wolfgang Denk | 20bd2a6 | 2011-07-27 10:59:55 +0000 | [diff] [blame] | 6416 | "scripts/Lindent" in your Linux kernel source directory. |
Detlev Zundel | aa63d48 | 2006-09-01 15:39:02 +0200 | [diff] [blame] | 6417 | |
| 6418 | Source files originating from a different project (for example the |
| 6419 | MTD subsystem) are generally exempt from these guidelines and are not |
Jeremiah Mahler | 03f930c | 2015-01-04 18:56:50 -0800 | [diff] [blame] | 6420 | reformatted to ease subsequent migration to newer versions of those |
Detlev Zundel | aa63d48 | 2006-09-01 15:39:02 +0200 | [diff] [blame] | 6421 | sources. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6422 | |
Detlev Zundel | aa63d48 | 2006-09-01 15:39:02 +0200 | [diff] [blame] | 6423 | Please note that U-Boot is implemented in C (and to some small parts in |
| 6424 | Assembler); no C++ is used, so please do not use C++ style comments (//) |
| 6425 | in your code. |
wdenk | ad276f2 | 2004-01-04 16:28:35 +0000 | [diff] [blame] | 6426 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6427 | Please also stick to the following formatting rules: |
| 6428 | - remove any trailing white space |
Wolfgang Denk | 20bd2a6 | 2011-07-27 10:59:55 +0000 | [diff] [blame] | 6429 | - use TAB characters for indentation and vertical alignment, not spaces |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6430 | - make sure NOT to use DOS '\r\n' line feeds |
Wolfgang Denk | 20bd2a6 | 2011-07-27 10:59:55 +0000 | [diff] [blame] | 6431 | - do not add more than 2 consecutive empty lines to source files |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6432 | - do not add trailing empty lines to source files |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6433 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6434 | Submissions which do not conform to the standards may be returned |
| 6435 | with a request to reformat the changes. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6436 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6437 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6438 | Submitting Patches: |
| 6439 | ------------------- |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6440 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6441 | Since the number of patches for U-Boot is growing, we need to |
| 6442 | establish some rules. Submissions which do not conform to these rules |
| 6443 | may be rejected, even when they contain important and valuable stuff. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6444 | |
Magnus Lilja | f3b287b | 2008-08-06 19:32:33 +0200 | [diff] [blame] | 6445 | Please see http://www.denx.de/wiki/U-Boot/Patches for details. |
Wolfgang Denk | b240aef | 2008-03-26 10:40:12 +0100 | [diff] [blame] | 6446 | |
Wolfgang Denk | 290ae6b | 2008-12-30 22:56:11 +0100 | [diff] [blame] | 6447 | Patches shall be sent to the u-boot mailing list <u-boot@lists.denx.de>; |
| 6448 | see http://lists.denx.de/mailman/listinfo/u-boot |
| 6449 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6450 | When you send a patch, please include the following information with |
| 6451 | it: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6452 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6453 | * For bug fixes: a description of the bug and how your patch fixes |
| 6454 | this bug. Please try to include a way of demonstrating that the |
| 6455 | patch actually fixes something. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6456 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6457 | * For new features: a description of the feature and your |
| 6458 | implementation. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6459 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6460 | * A CHANGELOG entry as plaintext (separate from the patch) |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6461 | |
Robert P. J. Day | 076ed9b | 2015-12-19 07:16:10 -0500 | [diff] [blame] | 6462 | * For major contributions, add a MAINTAINERS file with your |
| 6463 | information and associated file and directory references. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6464 | |
Albert ARIBAUD | 48e910f | 2013-09-11 15:52:51 +0200 | [diff] [blame] | 6465 | * When you add support for a new board, don't forget to add a |
| 6466 | maintainer e-mail address to the boards.cfg file, too. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6467 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6468 | * If your patch adds new configuration options, don't forget to |
| 6469 | document these in the README file. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6470 | |
Wolfgang Denk | b240aef | 2008-03-26 10:40:12 +0100 | [diff] [blame] | 6471 | * The patch itself. If you are using git (which is *strongly* |
| 6472 | recommended) you can easily generate the patch using the |
Wolfgang Denk | 20bd2a6 | 2011-07-27 10:59:55 +0000 | [diff] [blame] | 6473 | "git format-patch". If you then use "git send-email" to send it to |
Wolfgang Denk | b240aef | 2008-03-26 10:40:12 +0100 | [diff] [blame] | 6474 | the U-Boot mailing list, you will avoid most of the common problems |
| 6475 | with some other mail clients. |
wdenk | ca9bc76 | 2003-07-15 07:45:49 +0000 | [diff] [blame] | 6476 | |
Wolfgang Denk | b240aef | 2008-03-26 10:40:12 +0100 | [diff] [blame] | 6477 | If you cannot use git, use "diff -purN OLD NEW". If your version of |
| 6478 | diff does not support these options, then get the latest version of |
| 6479 | GNU diff. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6480 | |
Wolfgang Denk | b240aef | 2008-03-26 10:40:12 +0100 | [diff] [blame] | 6481 | The current directory when running this command shall be the parent |
| 6482 | directory of the U-Boot source tree (i. e. please make sure that |
| 6483 | your patch includes sufficient directory information for the |
| 6484 | affected files). |
| 6485 | |
| 6486 | We prefer patches as plain text. MIME attachments are discouraged, |
| 6487 | and compressed attachments must not be used. |
wdenk | 88e72a3 | 2003-06-19 23:04:19 +0000 | [diff] [blame] | 6488 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6489 | * If one logical set of modifications affects or creates several |
| 6490 | files, all these changes shall be submitted in a SINGLE patch file. |
wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 6491 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6492 | * Changesets that contain different, unrelated modifications shall be |
| 6493 | submitted as SEPARATE patches, one patch per changeset. |
wdenk | 88e72a3 | 2003-06-19 23:04:19 +0000 | [diff] [blame] | 6494 | |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6495 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6496 | Notes: |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6497 | |
Simon Glass | dc27def | 2016-07-27 20:33:08 -0600 | [diff] [blame] | 6498 | * Before sending the patch, run the buildman script on your patched |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6499 | source tree and make sure that no errors or warnings are reported |
| 6500 | for any of the boards. |
| 6501 | |
| 6502 | * Keep your modifications to the necessary minimum: A patch |
| 6503 | containing several unrelated changes or arbitrary reformats will be |
| 6504 | returned with a request to re-formatting / split it. |
wdenk | c609719 | 2002-11-03 00:24:07 +0000 | [diff] [blame] | 6505 | |
wdenk | 6c59edc | 2004-05-03 20:45:30 +0000 | [diff] [blame] | 6506 | * If you modify existing code, make sure that your new code does not |
| 6507 | add to the memory footprint of the code ;-) Small is beautiful! |
| 6508 | When adding new features, these should compile conditionally only |
| 6509 | (using #ifdef), and the resulting code with the new feature |
| 6510 | disabled must not need more memory than the old code without your |
| 6511 | modification. |
wdenk | cbc49a5 | 2005-05-03 14:12:25 +0000 | [diff] [blame] | 6512 | |
Wolfgang Denk | 290ae6b | 2008-12-30 22:56:11 +0100 | [diff] [blame] | 6513 | * Remember that there is a size limit of 100 kB per message on the |
| 6514 | u-boot mailing list. Bigger patches will be moderated. If they are |
| 6515 | reasonable and not too big, they will be acknowledged. But patches |
| 6516 | bigger than the size limit should be avoided. |