arch/arm/include/uapi/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 _UAPI__ASMARM_SETUP_H
  15 #define _UAPI__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 /* VGA text type displays */
  47 #define ATAG_VIDEOTEXT  0x54410003
  48
  49 struct 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
  64 struct 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
  80 struct 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
  88 struct tag_serialnr {
  89         __u32 low;
  90         __u32 high;
  91 };
  92
  93 /* board revision */
  94 #define ATAG_REVISION   0x54410007
  95
  96 struct 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
 105 struct 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
 125 struct tag_cmdline {
 126         char    cmdline[1];     /* this is the minimum size */
 127 };
 128
 129 /* acorn RiscPC specific information */
 130 #define ATAG_ACORN      0x41000101
 131
 132 struct 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
 142 struct tag_memclk {
 143         __u32 fmemclk;
 144 };
 145
 146 struct 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
 171 struct 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
 187 #endif /* _UAPI__ASMARM_SETUP_H */