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 Documentation/arm/Setup 12 * for more info. 13 */ 14#ifndef __ASMARM_SETUP_H 15#define __ASMARM_SETUP_H 16 17#include <linux/types.h> 18 19#define COMMAND_LINE_SIZE 1024 20 21/* The list ends with an ATAG_NONE node. */ 22#define ATAG_NONE 0x00000000 23 24struct tag_header { 25 __u32 size; 26 __u32 tag; 27}; 28 29/* The list must start with an ATAG_CORE node */ 30#define ATAG_CORE 0x54410001 31 32struct tag_core { 33 __u32 flags; /* bit 0 = read-only */ 34 __u32 pagesize; 35 __u32 rootdev; 36}; 37 38/* it is allowed to have multiple ATAG_MEM nodes */ 39#define ATAG_MEM 0x54410002 40 41struct tag_mem32 { 42 __u32 size; 43 __u32 start; /* physical start address */ 44}; 45 46/* VGA text type displays */ 47#define ATAG_VIDEOTEXT 0x54410003 48 49struct tag_videotext { 50 __u8 x; 51 __u8 y; 52 __u16 video_page; 53 __u8 video_mode; 54 __u8 video_cols; 55 __u16 video_ega_bx; 56 __u8 video_lines; 57 __u8 video_isvga; 58 __u16 video_points; 59}; 60 61/* describes how the ramdisk will be used in kernel */ 62#define ATAG_RAMDISK 0x54410004 63 64struct tag_ramdisk { 65 __u32 flags; /* bit 0 = load, bit 1 = prompt */ 66 __u32 size; /* decompressed ramdisk size in _kilo_ bytes */ 67 __u32 start; /* starting block of floppy-based RAM disk image */ 68}; 69 70/* describes where the compressed ramdisk image lives (virtual address) */ 71/* 72 * this one accidentally used virtual addresses - as such, 73 * it's deprecated. 74 */ 75#define ATAG_INITRD 0x54410005 76 77/* describes where the compressed ramdisk image lives (physical address) */ 78#define ATAG_INITRD2 0x54420005 79 80struct tag_initrd { 81 __u32 start; /* physical start address */ 82 __u32 size; /* size of compressed ramdisk image in bytes */ 83}; 84 85/* board serial number. "64 bits should be enough for everybody" */ 86#define ATAG_SERIAL 0x54410006 87 88struct tag_serialnr { 89 __u32 low; 90 __u32 high; 91}; 92 93/* board revision */ 94#define ATAG_REVISION 0x54410007 95 96struct tag_revision { 97 __u32 rev; 98}; 99 100/* initial values for vesafb-type framebuffers. see struct screen_info 101 * in include/linux/tty.h 102 */ 103#define ATAG_VIDEOLFB 0x54410008 104 105struct tag_videolfb { 106 __u16 lfb_width; 107 __u16 lfb_height; 108 __u16 lfb_depth; 109 __u16 lfb_linelength; 110 __u32 lfb_base; 111 __u32 lfb_size; 112 __u8 red_size; 113 __u8 red_pos; 114 __u8 green_size; 115 __u8 green_pos; 116 __u8 blue_size; 117 __u8 blue_pos; 118 __u8 rsvd_size; 119 __u8 rsvd_pos; 120}; 121 122/* command line: \0 terminated string */ 123#define ATAG_CMDLINE 0x54410009 124 125struct tag_cmdline { 126 char cmdline[1]; /* this is the minimum size */ 127}; 128 129/* acorn RiscPC specific information */ 130#define ATAG_ACORN 0x41000101 131 132struct tag_acorn { 133 __u32 memc_control_reg; 134 __u32 vram_pages; 135 __u8 sounddefault; 136 __u8 adfsdrives; 137}; 138 139/* footbridge memory clock, see arch/arm/mach-footbridge/arch.c */ 140#define ATAG_MEMCLK 0x41000402 141 142struct tag_memclk { 143 __u32 fmemclk; 144}; 145 146struct tag { 147 struct tag_header hdr; 148 union { 149 struct tag_core core; 150 struct tag_mem32 mem; 151 struct tag_videotext videotext; 152 struct tag_ramdisk ramdisk; 153 struct tag_initrd initrd; 154 struct tag_serialnr serialnr; 155 struct tag_revision revision; 156 struct tag_videolfb videolfb; 157 struct tag_cmdline cmdline; 158 159 /* 160 * Acorn specific 161 */ 162 struct tag_acorn acorn; 163 164 /* 165 * DC21285 specific 166 */ 167 struct tag_memclk memclk; 168 } u; 169}; 170 171struct tagtable { 172 __u32 tag; 173 int (*parse)(const struct tag *); 174}; 175 176#define tag_member_present(tag,member) \ 177 ((unsigned long)(&((struct tag *)0L)->member + 1) \ 178 <= (tag)->hdr.size * 4) 179 180#define tag_next(t) ((struct tag *)((__u32 *)(t) + (t)->hdr.size)) 181#define tag_size(type) ((sizeof(struct tag_header) + sizeof(struct type)) >> 2) 182 183#define for_each_tag(t,base) \ 184 for (t = base; t->hdr.size; t = tag_next(t)) 185 186#ifdef __KERNEL__ 187 188#define __tag __used __attribute__((__section__(".taglist.init"))) 189#define __tagtable(tag, fn) \ 190static struct tagtable __tagtable_##fn __tag = { tag, fn } 191 192/* 193 * Memory map description 194 */ 195#ifdef CONFIG_ARCH_LH7A40X 196# define NR_BANKS 16 197#else 198# define NR_BANKS 8 199#endif 200 201struct membank { 202 unsigned long start; 203 unsigned long size; 204 unsigned short node; 205 unsigned short highmem; 206}; 207 208struct meminfo { 209 int nr_banks; 210 struct membank bank[NR_BANKS]; 211}; 212 213extern struct meminfo meminfo; 214 215#define for_each_nodebank(iter,mi,no) \ 216 for (iter = 0; iter < (mi)->nr_banks; iter++) \ 217 if ((mi)->bank[iter].node == no) 218 219#define bank_pfn_start(bank) __phys_to_pfn((bank)->start) 220#define bank_pfn_end(bank) __phys_to_pfn((bank)->start + (bank)->size) 221#define bank_pfn_size(bank) ((bank)->size >> PAGE_SHIFT) 222#define bank_phys_start(bank) (bank)->start 223#define bank_phys_end(bank) ((bank)->start + (bank)->size) 224#define bank_phys_size(bank) (bank)->size 225 226/* 227 * Early command line parameters. 228 */ 229struct early_params { 230 const char *arg; 231 void (*fn)(char **p); 232}; 233 234#define __early_param(name,fn) \ 235static struct early_params __early_##fn __used \ 236__attribute__((__section__(".early_param.init"))) = { name, fn } 237 238#endif /* __KERNEL__ */ 239 240#endif 241