LXR linux/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
  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
 187#endif /* _UAPI__ASMARM_SETUP_H */
 188