git.zerfleddert.de Git - linexec-j720/blob - 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 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 #define u32     UINT32
  25 #define u16     UINT16
  26 #define u8      UINT8
  27
  28
  29 /*#ifndef CONFIG_ACCEPT_GPL
  30 #error This file covered by GPL but CONFIG_ACCEPT_GPL undefined.
  31 #endif*/
  32
  33 /*
  34  * Usage:
  35  *  - do not go blindly adding fields, add them at the end
  36  *  - when adding fields, don't rely on the address until
  37  *    a patch from me has been released
  38  *  - unused fields should be zero (for future expansion)
  39  *  - this structure is relatively short-lived - only
  40  *    guaranteed to contain useful data in setup_arch()
  41  */
  42 #define COMMAND_LINE_SIZE 1024
  43
  44 /* This is the old deprecated way to pass parameters to the kernel */
  45 struct param_struct {
  46     union {
  47         struct {
  48             unsigned long page_size;            /*  0 */
  49             unsigned long nr_pages;             /*  4 */
  50             unsigned long ramdisk_size;         /*  8 */
  51             unsigned long flags;                /* 12 */
  52 #define FLAG_READONLY   1
  53 #define FLAG_RDLOAD     4
  54 #define FLAG_RDPROMPT   8
  55             unsigned long rootdev;              /* 16 */
  56             unsigned long video_num_cols;       /* 20 */
  57             unsigned long video_num_rows;       /* 24 */
  58             unsigned long video_x;              /* 28 */
  59             unsigned long video_y;              /* 32 */
  60             unsigned long memc_control_reg;     /* 36 */
  61             unsigned char sounddefault;         /* 40 */
  62             unsigned char adfsdrives;           /* 41 */
  63             unsigned char bytes_per_char_h;     /* 42 */
  64             unsigned char bytes_per_char_v;     /* 43 */
  65             unsigned long pages_in_bank[4];     /* 44 */
  66             unsigned long pages_in_vram;        /* 60 */
  67             unsigned long initrd_start;         /* 64 */
  68             unsigned long initrd_size;          /* 68 */
  69             unsigned long rd_start;             /* 72 */
  70             unsigned long system_rev;           /* 76 */
  71             unsigned long system_serial_low;    /* 80 */
  72             unsigned long system_serial_high;   /* 84 */
  73             unsigned long mem_fclk_21285;       /* 88 */
  74         } s;
  75         char unused[256];
  76     } u1;
  77     union {
  78         char paths[8][128];
  79         struct {
  80             unsigned long magic;
  81             char n[1024 - sizeof(unsigned long)];
  82         } s;
  83     } u2;
  84     char commandline[COMMAND_LINE_SIZE];
  85 };
  86
  87
  88
  89 /*
  90  * The new way of passing information: a list of tagged entries
  91  */
  92
  93 /* The list ends with an ATAG_NONE node. */
  94 #define ATAG_NONE       0x00000000
  95
  96 struct tag_header {
  97         u32 size;
  98         u32 tag;
  99 };
 100
 101 /* The list must start with an ATAG_CORE node */
 102 #define ATAG_CORE       0x54410001
 103
 104 struct tag_core {
 105         u32 flags;              /* bit 0 = read-only */
 106         u32 pagesize;
 107         u32 rootdev;
 108 };
 109
 110 /* it is allowed to have multiple ATAG_MEM nodes */
 111 #define ATAG_MEM        0x54410002
 112
 113 struct tag_mem32 {
 114         u32     size;
 115         u32     start;  /* physical start address */
 116 };
 117
 118 /* VGA text type displays */
 119 #define ATAG_VIDEOTEXT  0x54410003
 120
 121 struct tag_videotext {
 122         u8              x;
 123         u8              y;
 124         u16             video_page;
 125         u8              video_mode;
 126         u8              video_cols;
 127         u16             video_ega_bx;
 128         u8              video_lines;
 129         u8              video_isvga;
 130         u16             video_points;
 131 };
 132
 133 /* describes how the ramdisk will be used in kernel */
 134 #define ATAG_RAMDISK    0x54410004
 135
 136 struct tag_ramdisk {
 137         u32 flags;      /* bit 0 = load, bit 1 = prompt */
 138         u32 size;       /* decompressed ramdisk size in _kilo_ bytes */
 139         u32 start;      /* starting block of floppy-based RAM disk image */
 140 };
 141
 142 /* describes where the compressed ramdisk image lives */
 143 #define ATAG_INITRD     0x54410005
 144
 145 #define ATAG_INITRD2    0x54420005
 146
 147 struct tag_initrd {
 148         u32 start;      /* physical start address */
 149         u32 size;       /* size of compressed ramdisk image in bytes */
 150 };
 151
 152 /* board serial number. "64 bits should be enough for everybody" */
 153 #define ATAG_SERIAL     0x54410006
 154
 155 struct tag_serialnr {
 156         u32 low;
 157         u32 high;
 158 };
 159
 160 /* board revision */
 161 #define ATAG_REVISION   0x54410007
 162
 163 struct tag_revision {
 164         u32 rev;
 165 };
 166
 167 /* initial values for vesafb-type framebuffers. see struct screen_info
 168  * in include/linux/tty.h
 169  */
 170 #define ATAG_VIDEOLFB   0x54410008
 171
 172 struct tag_videolfb {
 173         u16             lfb_width;
 174         u16             lfb_height;
 175         u16             lfb_depth;
 176         u16             lfb_linelength;
 177         u32             lfb_base;
 178         u32             lfb_size;
 179         u8              red_size;
 180         u8              red_pos;
 181         u8              green_size;
 182         u8              green_pos;
 183         u8              blue_size;
 184         u8              blue_pos;
 185         u8              rsvd_size;
 186         u8              rsvd_pos;
 187 };
 188
 189 /* command line: \0 terminated string */
 190 #define ATAG_CMDLINE    0x54410009
 191
 192 struct tag_cmdline {
 193         char    cmdline[1];     /* this is the minimum size */
 194 };
 195
 196 /* acorn RiscPC specific information */
 197 #define ATAG_ACORN      0x41000101
 198
 199 struct tag_acorn {
 200         u32 memc_control_reg;
 201         u32 vram_pages;
 202         u8 sounddefault;
 203         u8 adfsdrives;
 204 };
 205
 206 #define ATAG_PTABLE     0x53410001
 207
 208 /* footbridge memory clock, see arch/arm/mach-footbridge/arch.c */
 209 #define ATAG_MEMCLK     0x41000402
 210
 211 struct tag_memclk {
 212         u32 fmemclk;
 213 };
 214
 215 struct tag {
 216         struct tag_header hdr;
 217         union {
 218                 struct tag_core         core;
 219                 struct tag_mem32        mem;
 220                 struct tag_videotext    videotext;
 221                 struct tag_ramdisk      ramdisk;
 222                 struct tag_initrd       initrd;
 223                 struct tag_serialnr     serialnr;
 224                 struct tag_revision     revision;
 225                 struct tag_videolfb     videolfb;
 226                 struct tag_cmdline      cmdline;
 227 //                struct tag_ptable       ptable;
 228
 229                 /*
 230                  * Acorn specific
 231                  */
 232                 struct tag_acorn        acorn;
 233
 234                 /*
 235                  * DC21285 specific
 236                  */
 237                 struct tag_memclk       memclk;
 238
 239         } u;
 240 };
 241
 242 struct tagtable {
 243         u32 tag;
 244         int (*parse)(const struct tag *);
 245 };
 246
 247 #define __tag __attribute__((unused, __section__(".taglist")))
 248 #define __tagtable(tag, fn) \
 249 static struct tagtable __tagtable_##fn __tag = { tag, fn }
 250
 251 #define tag_member_present(tag,member)                          \
 252         ((unsigned long)(&((struct tag *)0L)->member + 1)       \
 253                 <= (tag)->hdr.size * 4)
 254
 255 #define tag_next(t)     ((struct tag *)((u32 *)(t) + (t)->hdr.size))
 256 #define tag_size(type)  ((sizeof(struct tag_header) + sizeof(struct type)) >> 2)
 257
 258 #define for_each_tag(t,base)            \
 259         for (t = base; t->hdr.size; t = tag_next(t))
 260
 261 /*
 262  * Memory map description
 263  */
 264 #define NR_BANKS 8
 265
 266 struct meminfo {
 267         int nr_banks;
 268         unsigned long end;
 269         struct {
 270                 unsigned long start;
 271                 unsigned long size;
 272                 int           node;
 273         } bank[NR_BANKS];
 274 };
 275
 276 extern struct meminfo meminfo;
 277
 278 #endif