arch/arm/include/asm/setup.h

   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
  24 struct 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
  32 struct 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
  41 struct tag_mem32 {
  42         __u32   size;
  43         __u32   start;  /* physical start address */
  44 };
  45
  46 #define ATAG_MEM64      0x54420002
  47
  48 struct tag_mem64 {
  49         __u64   size;
  50         __u64   start;  /* physical start address */
  51 };
  52
  53 /* VGA text type displays */
  54 #define ATAG_VIDEOTEXT  0x54410003
  55
  56 struct tag_videotext {
  57         __u8            x;
  58         __u8            y;
  59         __u16           video_page;
  60         __u8            video_mode;
  61         __u8            video_cols;
  62         __u16           video_ega_bx;
  63         __u8            video_lines;
  64         __u8            video_isvga;
  65         __u16           video_points;
  66 };
  67
  68 /* describes how the ramdisk will be used in kernel */
  69 #define ATAG_RAMDISK    0x54410004
  70
  71 struct tag_ramdisk {
  72         __u32 flags;    /* bit 0 = load, bit 1 = prompt */
  73         __u32 size;     /* decompressed ramdisk size in _kilo_ bytes */
  74         __u32 start;    /* starting block of floppy-based RAM disk image */
  75 };
  76
  77 /* describes where the compressed ramdisk image lives (virtual address) */
  78 /*
  79  * this one accidentally used virtual addresses - as such,
  80  * it's deprecated.
  81  */
  82 #define ATAG_INITRD     0x54410005
  83
  84 /* describes where the compressed ramdisk image lives (physical address) */
  85 #define ATAG_INITRD2    0x54420005
  86
  87 struct tag_initrd {
  88         __u32 start;    /* physical start address */
  89         __u32 size;     /* size of compressed ramdisk image in bytes */
  90 };
  91
  92 /* board serial number. "64 bits should be enough for everybody" */
  93 #define ATAG_SERIAL     0x54410006
  94
  95 struct tag_serialnr {
  96         __u32 low;
  97         __u32 high;
  98 };
  99
 100 /* board revision */
 101 #define ATAG_REVISION   0x54410007
 102
 103 struct tag_revision {
 104         __u32 rev;
 105 };
 106
 107 /* initial values for vesafb-type framebuffers. see struct screen_info
 108  * in include/linux/tty.h
 109  */
 110 #define ATAG_VIDEOLFB   0x54410008
 111
 112 struct tag_videolfb {
 113         __u16           lfb_width;
 114         __u16           lfb_height;
 115         __u16           lfb_depth;
 116         __u16           lfb_linelength;
 117         __u32           lfb_base;
 118         __u32           lfb_size;
 119         __u8            red_size;
 120         __u8            red_pos;
 121         __u8            green_size;
 122         __u8            green_pos;
 123         __u8            blue_size;
 124         __u8            blue_pos;
 125         __u8            rsvd_size;
 126         __u8            rsvd_pos;
 127 };
 128
 129 /* command line: \0 terminated string */
 130 #define ATAG_CMDLINE    0x54410009
 131
 132 struct tag_cmdline {
 133         char    cmdline[1];     /* this is the minimum size */
 134 };
 135
 136 /* acorn RiscPC specific information */
 137 #define ATAG_ACORN      0x41000101
 138
 139 struct tag_acorn {
 140         __u32 memc_control_reg;
 141         __u32 vram_pages;
 142         __u8 sounddefault;
 143         __u8 adfsdrives;
 144 };
 145
 146 /* footbridge memory clock, see arch/arm/mach-footbridge/arch.c */
 147 #define ATAG_MEMCLK     0x41000402
 148
 149 struct tag_memclk {
 150         __u32 fmemclk;
 151 };
 152
 153 struct tag {
 154         struct tag_header hdr;
 155         union {
 156                 struct tag_core         core;
 157                 struct tag_mem32        mem;
 158                 struct tag_mem64        mem64;
 159                 struct tag_videotext    videotext;
 160                 struct tag_ramdisk      ramdisk;
 161                 struct tag_initrd       initrd;
 162                 struct tag_serialnr     serialnr;
 163                 struct tag_revision     revision;
 164                 struct tag_videolfb     videolfb;
 165                 struct tag_cmdline      cmdline;
 166
 167                 /*
 168                  * Acorn specific
 169                  */
 170                 struct tag_acorn        acorn;
 171
 172                 /*
 173                  * DC21285 specific
 174                  */
 175                 struct tag_memclk       memclk;
 176         } u;
 177 };
 178
 179 struct tagtable {
 180         __u32 tag;
 181         int (*parse)(const struct tag *);
 182 };
 183
 184 #define tag_member_present(tag,member)                          \
 185         ((unsigned long)(&((struct tag *)0L)->member + 1)       \
 186                 <= (tag)->hdr.size * 4)
 187
 188 #define tag_next(t)     ((struct tag *)((__u32 *)(t) + (t)->hdr.size))
 189 #define tag_size(type)  ((sizeof(struct tag_header) + sizeof(struct type)) >> 2)
 190
 191 #define for_each_tag(t,base)            \
 192         for (t = base; t->hdr.size; t = tag_next(t))
 193
 194 #ifdef __KERNEL__
 195
 196 #define __tag __used __attribute__((__section__(".taglist.init")))
 197 #define __tagtable(tag, fn) \
 198 static const struct tagtable __tagtable_##fn __tag = { tag, fn }
 199
 200 /*
 201  * Memory map description
 202  */
 203 #ifdef CONFIG_ARCH_EP93XX
 204 # define NR_BANKS 16
 205 #else
 206 # define NR_BANKS 8
 207 #endif
 208
 209 struct membank {
 210         phys_addr_t start;
 211         unsigned long size;
 212         unsigned int highmem;
 213 };
 214
 215 struct meminfo {
 216         int nr_banks;
 217         struct membank bank[NR_BANKS];
 218 };
 219
 220 extern struct meminfo meminfo;
 221
 222 #define for_each_bank(iter,mi)                          \
 223         for (iter = 0; iter < (mi)->nr_banks; iter++)
 224
 225 #define bank_pfn_start(bank)    __phys_to_pfn((bank)->start)
 226 #define bank_pfn_end(bank)      __phys_to_pfn((bank)->start + (bank)->size)
 227 #define bank_pfn_size(bank)     ((bank)->size >> PAGE_SHIFT)
 228 #define bank_phys_start(bank)   (bank)->start
 229 #define bank_phys_end(bank)     ((bank)->start + (bank)->size)
 230 #define bank_phys_size(bank)    (bank)->size
 231
 232 extern int arm_add_memory(phys_addr_t start, unsigned long size);
 233 extern void early_print(const char *str, ...);
 234 extern void dump_machine_table(void);
 235
 236 #endif  /*  __KERNEL__  */
 237
 238 #endif