Simon Glass | ca96f65 | 2011-10-03 19:26:37 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2011 The Chromium OS Authors. |
| 3 | * |
| 4 | * (C) Copyright 2002-2006 |
| 5 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| 6 | * |
| 7 | * (C) Copyright 2002 |
| 8 | * Sysgo Real-Time Solutions, GmbH <www.elinos.com> |
| 9 | * Marius Groeger <mgroeger@sysgo.de> |
| 10 | * |
| 11 | * See file CREDITS for list of people who contributed to this |
| 12 | * project. |
| 13 | * |
| 14 | * This program is free software; you can redistribute it and/or |
| 15 | * modify it under the terms of the GNU General Public License as |
| 16 | * published by the Free Software Foundation; either version 2 of |
| 17 | * the License, or (at your option) any later version. |
| 18 | * |
| 19 | * This program is distributed in the hope that it will be useful, |
| 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 22 | * GNU General Public License for more details. |
| 23 | * |
| 24 | * You should have received a copy of the GNU General Public License |
| 25 | * along with this program; if not, write to the Free Software |
| 26 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 27 | * MA 02111-1307 USA |
| 28 | */ |
| 29 | |
| 30 | /* |
| 31 | * This file was taken from ARM and changed to remove things we don't |
| 32 | * need. This is most of it, so have tried to avoid being over-zealous! |
| 33 | * For example, we want to have an emulation of the 'DRAM' used by |
| 34 | * U-Boot. |
| 35 | * |
| 36 | * has been talk upstream of unifying the architectures w.r.t board.c, |
| 37 | * so the less change here the better. |
| 38 | */ |
| 39 | |
| 40 | #include <common.h> |
| 41 | #include <command.h> |
| 42 | #include <malloc.h> |
| 43 | #include <stdio_dev.h> |
| 44 | #include <timestamp.h> |
| 45 | #include <version.h> |
| 46 | #include <serial.h> |
| 47 | |
Matthias Weisser | b5f7b47 | 2011-11-05 11:40:34 +0100 | [diff] [blame] | 48 | #include <os.h> |
| 49 | |
Simon Glass | ca96f65 | 2011-10-03 19:26:37 +0000 | [diff] [blame] | 50 | DECLARE_GLOBAL_DATA_PTR; |
| 51 | |
Matthias Weisser | b5f7b47 | 2011-11-05 11:40:34 +0100 | [diff] [blame] | 52 | static gd_t gd_mem; |
| 53 | |
Simon Glass | ca96f65 | 2011-10-03 19:26:37 +0000 | [diff] [blame] | 54 | /************************************************************************ |
| 55 | * Init Utilities * |
| 56 | ************************************************************************ |
| 57 | * Some of this code should be moved into the core functions, |
| 58 | * or dropped completely, |
| 59 | * but let's get it working (again) first... |
| 60 | */ |
| 61 | |
| 62 | static int display_banner(void) |
| 63 | { |
| 64 | display_options(); |
| 65 | |
| 66 | return 0; |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * Configure and report on the DRAM configuration, which in our case is |
| 71 | * fairly simple. |
| 72 | */ |
| 73 | static int display_dram_config(void) |
| 74 | { |
| 75 | ulong size = 0; |
| 76 | int i; |
| 77 | |
| 78 | debug("RAM Configuration:\n"); |
| 79 | |
| 80 | for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) { |
| 81 | #ifdef DEBUG |
| 82 | printf("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start); |
| 83 | print_size(gd->bd->bi_dram[i].size, "\n"); |
| 84 | #endif |
| 85 | size += gd->bd->bi_dram[i].size; |
| 86 | } |
| 87 | puts("DRAM: "); |
| 88 | print_size(size, "\n"); |
| 89 | return 0; |
| 90 | } |
| 91 | |
| 92 | /* |
| 93 | * Breathe some life into the board... |
| 94 | * |
| 95 | * Initialize a serial port as console, and carry out some hardware |
| 96 | * tests. |
| 97 | * |
| 98 | * The first part of initialization is running from Flash memory; |
| 99 | * its main purpose is to initialize the RAM so that we |
| 100 | * can relocate the monitor code to RAM. |
| 101 | */ |
| 102 | |
| 103 | /* |
| 104 | * All attempts to come up with a "common" initialization sequence |
| 105 | * that works for all boards and architectures failed: some of the |
| 106 | * requirements are just _too_ different. To get rid of the resulting |
| 107 | * mess of board dependent #ifdef'ed code we now make the whole |
| 108 | * initialization sequence configurable to the user. |
| 109 | * |
| 110 | * The requirements for any new initalization function is simple: it |
| 111 | * receives a pointer to the "global data" structure as it's only |
| 112 | * argument, and returns an integer return code, where 0 means |
| 113 | * "continue" and != 0 means "fatal error, hang the system". |
| 114 | */ |
| 115 | typedef int (init_fnc_t) (void); |
| 116 | |
| 117 | void __dram_init_banksize(void) |
| 118 | { |
| 119 | gd->bd->bi_dram[0].start = 0; |
| 120 | gd->bd->bi_dram[0].size = gd->ram_size; |
| 121 | } |
| 122 | |
| 123 | void dram_init_banksize(void) |
| 124 | __attribute__((weak, alias("__dram_init_banksize"))); |
| 125 | |
| 126 | init_fnc_t *init_sequence[] = { |
| 127 | #if defined(CONFIG_ARCH_CPU_INIT) |
| 128 | arch_cpu_init, /* basic arch cpu dependent setup */ |
| 129 | #endif |
| 130 | #if defined(CONFIG_BOARD_EARLY_INIT_F) |
| 131 | board_early_init_f, |
| 132 | #endif |
| 133 | timer_init, /* initialize timer */ |
| 134 | env_init, /* initialize environment */ |
| 135 | serial_init, /* serial communications setup */ |
| 136 | console_init_f, /* stage 1 init of console */ |
| 137 | display_banner, /* say that we are here */ |
| 138 | #if defined(CONFIG_DISPLAY_CPUINFO) |
| 139 | print_cpuinfo, /* display cpu info (and speed) */ |
| 140 | #endif |
| 141 | #if defined(CONFIG_DISPLAY_BOARDINFO) |
| 142 | checkboard, /* display board info */ |
| 143 | #endif |
| 144 | dram_init, /* configure available RAM banks */ |
| 145 | NULL, |
| 146 | }; |
| 147 | |
| 148 | void board_init_f(ulong bootflag) |
| 149 | { |
| 150 | init_fnc_t **init_fnc_ptr; |
| 151 | uchar *mem; |
| 152 | unsigned long addr_sp, addr, size; |
| 153 | |
Matthias Weisser | b5f7b47 | 2011-11-05 11:40:34 +0100 | [diff] [blame] | 154 | gd = &gd_mem; |
Simon Glass | ca96f65 | 2011-10-03 19:26:37 +0000 | [diff] [blame] | 155 | assert(gd); |
| 156 | |
| 157 | memset((void *)gd, 0, sizeof(gd_t)); |
| 158 | |
Simon Glass | dfa2fe3 | 2012-02-15 15:51:11 -0800 | [diff] [blame] | 159 | #if defined(CONFIG_OF_EMBED) |
| 160 | /* Get a pointer to the FDT */ |
| 161 | gd->fdt_blob = _binary_dt_dtb_start; |
| 162 | #elif defined(CONFIG_OF_SEPARATE) |
| 163 | /* FDT is at end of image */ |
| 164 | gd->fdt_blob = (void *)(_end_ofs + _TEXT_BASE); |
| 165 | #endif |
| 166 | |
Simon Glass | ca96f65 | 2011-10-03 19:26:37 +0000 | [diff] [blame] | 167 | for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) { |
| 168 | if ((*init_fnc_ptr)() != 0) |
| 169 | hang(); |
| 170 | } |
| 171 | |
| 172 | size = CONFIG_SYS_SDRAM_SIZE; |
Matthias Weisser | b5f7b47 | 2011-11-05 11:40:34 +0100 | [diff] [blame] | 173 | mem = os_malloc(CONFIG_SYS_SDRAM_SIZE); |
| 174 | |
Simon Glass | ca96f65 | 2011-10-03 19:26:37 +0000 | [diff] [blame] | 175 | assert(mem); |
| 176 | gd->ram_buf = mem; |
| 177 | addr = (ulong)(mem + size); |
| 178 | |
| 179 | /* |
| 180 | * reserve memory for malloc() arena |
| 181 | */ |
| 182 | addr_sp = addr - TOTAL_MALLOC_LEN; |
| 183 | debug("Reserving %dk for malloc() at: %08lx\n", |
| 184 | TOTAL_MALLOC_LEN >> 10, addr_sp); |
| 185 | /* |
| 186 | * (permanently) allocate a Board Info struct |
| 187 | * and a permanent copy of the "global" data |
| 188 | */ |
| 189 | addr_sp -= sizeof(bd_t); |
| 190 | gd->bd = (bd_t *) addr_sp; |
| 191 | debug("Reserving %zu Bytes for Board Info at: %08lx\n", |
| 192 | sizeof(bd_t), addr_sp); |
| 193 | |
| 194 | /* Ram ist board specific, so move it to board code ... */ |
| 195 | dram_init_banksize(); |
| 196 | display_dram_config(); /* and display it */ |
| 197 | |
| 198 | /* We don't relocate, so just run the post-relocation code */ |
| 199 | board_init_r(NULL, 0); |
| 200 | |
| 201 | /* NOTREACHED - no way out of command loop except booting */ |
| 202 | } |
| 203 | |
| 204 | /************************************************************************ |
| 205 | * |
| 206 | * This is the next part if the initialization sequence: we are now |
| 207 | * running from RAM and have a "normal" C environment, i. e. global |
| 208 | * data can be written, BSS has been cleared, the stack size in not |
| 209 | * that critical any more, etc. |
| 210 | * |
| 211 | ************************************************************************ |
| 212 | */ |
| 213 | |
| 214 | void board_init_r(gd_t *id, ulong dest_addr) |
| 215 | { |
| 216 | |
| 217 | if (id) |
| 218 | gd = id; |
| 219 | |
| 220 | gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */ |
| 221 | |
| 222 | #ifdef CONFIG_SERIAL_MULTI |
| 223 | serial_initialize(); |
| 224 | #endif |
| 225 | |
| 226 | #ifdef CONFIG_POST |
| 227 | post_output_backlog(); |
| 228 | #endif |
| 229 | |
Matthias Weisser | b5f7b47 | 2011-11-05 11:40:34 +0100 | [diff] [blame] | 230 | /* The Malloc area is at the top of simulated DRAM */ |
| 231 | mem_malloc_init((ulong)gd->ram_buf + gd->ram_size - TOTAL_MALLOC_LEN, |
| 232 | TOTAL_MALLOC_LEN); |
Simon Glass | ca96f65 | 2011-10-03 19:26:37 +0000 | [diff] [blame] | 233 | |
| 234 | /* initialize environment */ |
| 235 | env_relocate(); |
| 236 | |
| 237 | /* IP Address */ |
| 238 | gd->bd->bi_ip_addr = getenv_IPaddr("ipaddr"); |
| 239 | |
| 240 | stdio_init(); /* get the devices list going. */ |
| 241 | |
| 242 | jumptable_init(); |
| 243 | |
| 244 | console_init_r(); /* fully init console as a device */ |
| 245 | |
| 246 | #if defined(CONFIG_DISPLAY_BOARDINFO_LATE) |
| 247 | checkboard(); |
| 248 | #endif |
| 249 | |
| 250 | #if defined(CONFIG_ARCH_MISC_INIT) |
| 251 | /* miscellaneous arch dependent initialisations */ |
| 252 | arch_misc_init(); |
| 253 | #endif |
| 254 | #if defined(CONFIG_MISC_INIT_R) |
| 255 | /* miscellaneous platform dependent initialisations */ |
| 256 | misc_init_r(); |
| 257 | #endif |
| 258 | |
| 259 | /* set up exceptions */ |
| 260 | interrupt_init(); |
| 261 | /* enable exceptions */ |
| 262 | enable_interrupts(); |
| 263 | |
Helmut Raiger | d5a184b | 2011-10-20 04:19:47 +0000 | [diff] [blame] | 264 | #ifdef CONFIG_BOARD_LATE_INIT |
Simon Glass | ca96f65 | 2011-10-03 19:26:37 +0000 | [diff] [blame] | 265 | board_late_init(); |
| 266 | #endif |
| 267 | |
| 268 | #ifdef CONFIG_POST |
| 269 | post_run(NULL, POST_RAM | post_bootmode_get(0)); |
| 270 | #endif |
| 271 | |
Simon Glass | 0fc3c22 | 2012-02-26 17:38:50 -0500 | [diff] [blame^] | 272 | sandbox_main_loop_init(); |
| 273 | |
Simon Glass | ca96f65 | 2011-10-03 19:26:37 +0000 | [diff] [blame] | 274 | /* |
| 275 | * For now, run the main loop. Later we might let this be done |
| 276 | * in the main program. |
| 277 | */ |
| 278 | while (1) |
| 279 | main_loop(); |
| 280 | |
| 281 | /* NOTREACHED - no way out of command loop except booting */ |
| 282 | } |
| 283 | |
| 284 | void hang(void) |
| 285 | { |
| 286 | puts("### ERROR ### Please RESET the board ###\n"); |
| 287 | for (;;) |
| 288 | ; |
| 289 | } |