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 */ 188