wdenk | bb2d927 | 2003-06-25 22:26:29 +0000 | [diff] [blame] | 1 | /* |
| 2 | * linux/include/asm/setup.h |
| 3 | * |
| 4 | * Copyright (C) 1997-1999 Russell King |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | * |
| 10 | * Structure passed to kernel to tell it about the |
| 11 | * hardware it's running on. See linux/Documentation/arm/Setup |
| 12 | * for more info. |
| 13 | * |
| 14 | * NOTE: |
| 15 | * This file contains two ways to pass information from the boot |
| 16 | * loader to the kernel. The old struct param_struct is deprecated, |
| 17 | * but it will be kept in the kernel for 5 years from now |
| 18 | * (2001). This will allow boot loaders to convert to the new struct |
| 19 | * tag way. |
| 20 | */ |
| 21 | #ifndef __ASMARM_SETUP_H |
| 22 | #define __ASMARM_SETUP_H |
| 23 | |
| 24 | /* |
| 25 | * Usage: |
| 26 | * - do not go blindly adding fields, add them at the end |
| 27 | * - when adding fields, don't rely on the address until |
| 28 | * a patch from me has been released |
| 29 | * - unused fields should be zero (for future expansion) |
| 30 | * - this structure is relatively short-lived - only |
| 31 | * guaranteed to contain useful data in setup_arch() |
| 32 | */ |
| 33 | #define COMMAND_LINE_SIZE 1024 |
| 34 | |
| 35 | /* This is the old deprecated way to pass parameters to the kernel */ |
| 36 | struct param_struct { |
| 37 | union { |
| 38 | struct { |
| 39 | unsigned long page_size; /* 0 */ |
| 40 | unsigned long nr_pages; /* 4 */ |
| 41 | unsigned long ramdisk_size; /* 8 */ |
| 42 | unsigned long flags; /* 12 */ |
| 43 | #define FLAG_READONLY 1 |
| 44 | #define FLAG_RDLOAD 4 |
| 45 | #define FLAG_RDPROMPT 8 |
| 46 | unsigned long rootdev; /* 16 */ |
| 47 | unsigned long video_num_cols; /* 20 */ |
| 48 | unsigned long video_num_rows; /* 24 */ |
| 49 | unsigned long video_x; /* 28 */ |
| 50 | unsigned long video_y; /* 32 */ |
| 51 | unsigned long memc_control_reg; /* 36 */ |
| 52 | unsigned char sounddefault; /* 40 */ |
| 53 | unsigned char adfsdrives; /* 41 */ |
| 54 | unsigned char bytes_per_char_h; /* 42 */ |
| 55 | unsigned char bytes_per_char_v; /* 43 */ |
| 56 | unsigned long pages_in_bank[4]; /* 44 */ |
| 57 | unsigned long pages_in_vram; /* 60 */ |
| 58 | unsigned long initrd_start; /* 64 */ |
| 59 | unsigned long initrd_size; /* 68 */ |
| 60 | unsigned long rd_start; /* 72 */ |
| 61 | unsigned long system_rev; /* 76 */ |
| 62 | unsigned long system_serial_low; /* 80 */ |
| 63 | unsigned long system_serial_high; /* 84 */ |
| 64 | unsigned long mem_fclk_21285; /* 88 */ |
| 65 | } s; |
| 66 | char unused[256]; |
| 67 | } u1; |
| 68 | union { |
| 69 | char paths[8][128]; |
| 70 | struct { |
| 71 | unsigned long magic; |
| 72 | char n[1024 - sizeof(unsigned long)]; |
| 73 | } s; |
| 74 | } u2; |
| 75 | char commandline[COMMAND_LINE_SIZE]; |
| 76 | }; |
| 77 | |
| 78 | |
wdenk | bb2d927 | 2003-06-25 22:26:29 +0000 | [diff] [blame] | 79 | /* |
| 80 | * The new way of passing information: a list of tagged entries |
| 81 | */ |
| 82 | |
| 83 | /* The list ends with an ATAG_NONE node. */ |
| 84 | #define ATAG_NONE 0x00000000 |
| 85 | |
| 86 | struct tag_header { |
| 87 | u32 size; |
| 88 | u32 tag; |
| 89 | }; |
| 90 | |
| 91 | /* The list must start with an ATAG_CORE node */ |
| 92 | #define ATAG_CORE 0x54410001 |
| 93 | |
| 94 | struct tag_core { |
| 95 | u32 flags; /* bit 0 = read-only */ |
| 96 | u32 pagesize; |
| 97 | u32 rootdev; |
| 98 | }; |
| 99 | |
| 100 | /* it is allowed to have multiple ATAG_MEM nodes */ |
| 101 | #define ATAG_MEM 0x54410002 |
| 102 | |
| 103 | struct tag_mem32 { |
| 104 | u32 size; |
| 105 | u32 start; /* physical start address */ |
| 106 | }; |
| 107 | |
| 108 | /* VGA text type displays */ |
| 109 | #define ATAG_VIDEOTEXT 0x54410003 |
| 110 | |
| 111 | struct tag_videotext { |
| 112 | u8 x; |
| 113 | u8 y; |
| 114 | u16 video_page; |
| 115 | u8 video_mode; |
| 116 | u8 video_cols; |
| 117 | u16 video_ega_bx; |
| 118 | u8 video_lines; |
| 119 | u8 video_isvga; |
| 120 | u16 video_points; |
| 121 | }; |
| 122 | |
| 123 | /* describes how the ramdisk will be used in kernel */ |
| 124 | #define ATAG_RAMDISK 0x54410004 |
| 125 | |
| 126 | struct tag_ramdisk { |
| 127 | u32 flags; /* bit 0 = load, bit 1 = prompt */ |
| 128 | u32 size; /* decompressed ramdisk size in _kilo_ bytes */ |
| 129 | u32 start; /* starting block of floppy-based RAM disk image */ |
| 130 | }; |
| 131 | |
| 132 | /* describes where the compressed ramdisk image lives (virtual address) */ |
| 133 | /* |
| 134 | * this one accidentally used virtual addresses - as such, |
Robert P. J. Day | c5b1e5d | 2016-09-07 14:27:59 -0400 | [diff] [blame] | 135 | * it's deprecated. |
wdenk | bb2d927 | 2003-06-25 22:26:29 +0000 | [diff] [blame] | 136 | */ |
| 137 | #define ATAG_INITRD 0x54410005 |
| 138 | |
| 139 | /* describes where the compressed ramdisk image lives (physical address) */ |
| 140 | #define ATAG_INITRD2 0x54420005 |
| 141 | |
| 142 | struct tag_initrd { |
| 143 | u32 start; /* physical start address */ |
| 144 | u32 size; /* size of compressed ramdisk image in bytes */ |
| 145 | }; |
| 146 | |
| 147 | /* board serial number. "64 bits should be enough for everybody" */ |
| 148 | #define ATAG_SERIAL 0x54410006 |
| 149 | |
| 150 | struct tag_serialnr { |
| 151 | u32 low; |
| 152 | u32 high; |
| 153 | }; |
| 154 | |
| 155 | /* board revision */ |
| 156 | #define ATAG_REVISION 0x54410007 |
| 157 | |
| 158 | struct tag_revision { |
| 159 | u32 rev; |
| 160 | }; |
| 161 | |
| 162 | /* initial values for vesafb-type framebuffers. see struct screen_info |
| 163 | * in include/linux/tty.h |
| 164 | */ |
| 165 | #define ATAG_VIDEOLFB 0x54410008 |
| 166 | |
| 167 | struct tag_videolfb { |
| 168 | u16 lfb_width; |
| 169 | u16 lfb_height; |
| 170 | u16 lfb_depth; |
| 171 | u16 lfb_linelength; |
| 172 | u32 lfb_base; |
| 173 | u32 lfb_size; |
| 174 | u8 red_size; |
| 175 | u8 red_pos; |
| 176 | u8 green_size; |
| 177 | u8 green_pos; |
| 178 | u8 blue_size; |
| 179 | u8 blue_pos; |
| 180 | u8 rsvd_size; |
| 181 | u8 rsvd_pos; |
| 182 | }; |
| 183 | |
| 184 | /* command line: \0 terminated string */ |
| 185 | #define ATAG_CMDLINE 0x54410009 |
| 186 | |
| 187 | struct tag_cmdline { |
| 188 | char cmdline[1]; /* this is the minimum size */ |
| 189 | }; |
| 190 | |
| 191 | /* acorn RiscPC specific information */ |
| 192 | #define ATAG_ACORN 0x41000101 |
| 193 | |
| 194 | struct tag_acorn { |
| 195 | u32 memc_control_reg; |
| 196 | u32 vram_pages; |
| 197 | u8 sounddefault; |
| 198 | u8 adfsdrives; |
| 199 | }; |
| 200 | |
| 201 | /* footbridge memory clock, see arch/arm/mach-footbridge/arch.c */ |
| 202 | #define ATAG_MEMCLK 0x41000402 |
| 203 | |
| 204 | struct tag_memclk { |
| 205 | u32 fmemclk; |
| 206 | }; |
| 207 | |
| 208 | struct tag { |
| 209 | struct tag_header hdr; |
| 210 | union { |
| 211 | struct tag_core core; |
| 212 | struct tag_mem32 mem; |
| 213 | struct tag_videotext videotext; |
| 214 | struct tag_ramdisk ramdisk; |
| 215 | struct tag_initrd initrd; |
| 216 | struct tag_serialnr serialnr; |
| 217 | struct tag_revision revision; |
| 218 | struct tag_videolfb videolfb; |
| 219 | struct tag_cmdline cmdline; |
| 220 | |
| 221 | /* |
| 222 | * Acorn specific |
| 223 | */ |
| 224 | struct tag_acorn acorn; |
| 225 | |
| 226 | /* |
| 227 | * DC21285 specific |
| 228 | */ |
| 229 | struct tag_memclk memclk; |
| 230 | } u; |
| 231 | }; |
| 232 | |
| 233 | struct tagtable { |
| 234 | u32 tag; |
| 235 | int (*parse)(const struct tag *); |
| 236 | }; |
| 237 | |
Marek Behún | 4bebdd3 | 2021-05-20 13:23:52 +0200 | [diff] [blame] | 238 | #define __tag __attribute__((unused)) __section(".taglist") |
wdenk | bb2d927 | 2003-06-25 22:26:29 +0000 | [diff] [blame] | 239 | #define __tagtable(tag, fn) \ |
| 240 | static struct tagtable __tagtable_##fn __tag = { tag, fn } |
| 241 | |
| 242 | #define tag_member_present(tag,member) \ |
| 243 | ((unsigned long)(&((struct tag *)0L)->member + 1) \ |
| 244 | <= (tag)->hdr.size * 4) |
| 245 | |
| 246 | #define tag_next(t) ((struct tag *)((u32 *)(t) + (t)->hdr.size)) |
| 247 | #define tag_size(type) ((sizeof(struct tag_header) + sizeof(struct type)) >> 2) |
| 248 | |
| 249 | #define for_each_tag(t,base) \ |
| 250 | for (t = base; t->hdr.size; t = tag_next(t)) |
| 251 | |
| 252 | /* |
| 253 | * Memory map description |
| 254 | */ |
| 255 | #define NR_BANKS 8 |
| 256 | |
| 257 | struct meminfo { |
| 258 | int nr_banks; |
| 259 | unsigned long end; |
| 260 | struct { |
| 261 | unsigned long start; |
| 262 | unsigned long size; |
| 263 | int node; |
| 264 | } bank[NR_BANKS]; |
| 265 | }; |
| 266 | |
| 267 | extern struct meminfo meminfo; |
| 268 | |
| 269 | #endif |
Pali Rohár | 5ebe4f1 | 2012-10-19 02:00:04 +0000 | [diff] [blame] | 270 | |
| 271 | /* |
| 272 | * Board specified tags |
| 273 | */ |
| 274 | void setup_board_tags(struct tag **in_params); |