| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| 2 | /* |
| 3 | * linux/include/asm/setup.h |
| 4 | * |
| 5 | * Copyright (C) 1997-1999 Russell King |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | * |
| 11 | * Structure passed to kernel to tell it about the |
| 12 | * hardware it's running on. See Documentation/arm/setup.rst |
| 13 | * for more info. |
| 14 | */ |
| 15 | #ifndef _UAPI__ASMARM_SETUP_H |
| 16 | #define _UAPI__ASMARM_SETUP_H |
| 17 | |
| 18 | #include <linux/types.h> |
| 19 | |
| 20 | #define COMMAND_LINE_SIZE 1024 |
| 21 | |
| 22 | /* The list ends with an ATAG_NONE node. */ |
| 23 | #define ATAG_NONE 0x00000000 |
| 24 | |
| 25 | struct tag_header { |
| 26 | __u32 size; |
| 27 | __u32 tag; |
| 28 | }; |
| 29 | |
| 30 | /* The list must start with an ATAG_CORE node */ |
| 31 | #define ATAG_CORE 0x54410001 |
| 32 | |
| 33 | struct tag_core { |
| 34 | __u32 flags; /* bit 0 = read-only */ |
| 35 | __u32 pagesize; |
| 36 | __u32 rootdev; |
| 37 | }; |
| 38 | |
| 39 | /* it is allowed to have multiple ATAG_MEM nodes */ |
| 40 | #define ATAG_MEM 0x54410002 |
| 41 | |
| 42 | struct tag_mem32 { |
| 43 | __u32 size; |
| 44 | __u32 start; /* physical start address */ |
| 45 | }; |
| 46 | |
| 47 | /* VGA text type displays */ |
| 48 | #define ATAG_VIDEOTEXT 0x54410003 |
| 49 | |
| 50 | struct tag_videotext { |
| 51 | __u8 x; |
| 52 | __u8 y; |
| 53 | __u16 video_page; |
| 54 | __u8 video_mode; |
| 55 | __u8 video_cols; |
| 56 | __u16 video_ega_bx; |
| 57 | __u8 video_lines; |
| 58 | __u8 video_isvga; |
| 59 | __u16 video_points; |
| 60 | }; |
| 61 | |
| 62 | /* describes how the ramdisk will be used in kernel */ |
| 63 | #define ATAG_RAMDISK 0x54410004 |
| 64 | |
| 65 | struct tag_ramdisk { |
| 66 | __u32 flags; /* bit 0 = load, bit 1 = prompt */ |
| 67 | __u32 size; /* decompressed ramdisk size in _kilo_ bytes */ |
| 68 | __u32 start; /* starting block of floppy-based RAM disk image */ |
| 69 | }; |
| 70 | |
| 71 | /* describes where the compressed ramdisk image lives (virtual address) */ |
| 72 | /* |
| 73 | * this one accidentally used virtual addresses - as such, |
| 74 | * it's deprecated. |
| 75 | */ |
| 76 | #define ATAG_INITRD 0x54410005 |
| 77 | |
| 78 | /* describes where the compressed ramdisk image lives (physical address) */ |
| 79 | #define ATAG_INITRD2 0x54420005 |
| 80 | |
| 81 | struct tag_initrd { |
| 82 | __u32 start; /* physical start address */ |
| 83 | __u32 size; /* size of compressed ramdisk image in bytes */ |
| 84 | }; |
| 85 | |
| 86 | /* board serial number. "64 bits should be enough for everybody" */ |
| 87 | #define ATAG_SERIAL 0x54410006 |
| 88 | |
| 89 | struct tag_serialnr { |
| 90 | __u32 low; |
| 91 | __u32 high; |
| 92 | }; |
| 93 | |
| 94 | /* board revision */ |
| 95 | #define ATAG_REVISION 0x54410007 |
| 96 | |
| 97 | struct tag_revision { |
| 98 | __u32 rev; |
| 99 | }; |
| 100 | |
| 101 | /* initial values for vesafb-type framebuffers. see struct screen_info |
| 102 | * in include/linux/tty.h |
| 103 | */ |
| 104 | #define ATAG_VIDEOLFB 0x54410008 |
| 105 | |
| 106 | struct tag_videolfb { |
| 107 | __u16 lfb_width; |
| 108 | __u16 lfb_height; |
| 109 | __u16 lfb_depth; |
| 110 | __u16 lfb_linelength; |
| 111 | __u32 lfb_base; |
| 112 | __u32 lfb_size; |
| 113 | __u8 red_size; |
| 114 | __u8 red_pos; |
| 115 | __u8 green_size; |
| 116 | __u8 green_pos; |
| 117 | __u8 blue_size; |
| 118 | __u8 blue_pos; |
| 119 | __u8 rsvd_size; |
| 120 | __u8 rsvd_pos; |
| 121 | }; |
| 122 | |
| 123 | /* command line: \0 terminated string */ |
| 124 | #define ATAG_CMDLINE 0x54410009 |
| 125 | |
| 126 | struct tag_cmdline { |
| 127 | char cmdline[1]; /* this is the minimum size */ |
| 128 | }; |
| 129 | |
| 130 | /* acorn RiscPC specific information */ |
| 131 | #define ATAG_ACORN 0x41000101 |
| 132 | |
| 133 | struct tag_acorn { |
| 134 | __u32 memc_control_reg; |
| 135 | __u32 vram_pages; |
| 136 | __u8 sounddefault; |
| 137 | __u8 adfsdrives; |
| 138 | }; |
| 139 | |
| 140 | /* footbridge memory clock, see arch/arm/mach-footbridge/arch.c */ |
| 141 | #define ATAG_MEMCLK 0x41000402 |
| 142 | |
| 143 | struct tag_memclk { |
| 144 | __u32 fmemclk; |
| 145 | }; |
| 146 | |
| 147 | struct tag { |
| 148 | struct tag_header hdr; |
| 149 | union { |
| 150 | struct tag_core core; |
| 151 | struct tag_mem32 mem; |
| 152 | struct tag_videotext videotext; |
| 153 | struct tag_ramdisk ramdisk; |
| 154 | struct tag_initrd initrd; |
| 155 | struct tag_serialnr serialnr; |
| 156 | struct tag_revision revision; |
| 157 | struct tag_videolfb videolfb; |
| 158 | struct tag_cmdline cmdline; |
| 159 | |
| 160 | /* |
| 161 | * Acorn specific |
| 162 | */ |
| 163 | struct tag_acorn acorn; |
| 164 | |
| 165 | /* |
| 166 | * DC21285 specific |
| 167 | */ |
| 168 | struct tag_memclk memclk; |
| 169 | } u; |
| 170 | }; |
| 171 | |
| 172 | struct tagtable { |
| 173 | __u32 tag; |
| 174 | int (*parse)(const struct tag *); |
| 175 | }; |
| 176 | |
| 177 | #define tag_member_present(tag,member) \ |
| 178 | ((unsigned long)(&((struct tag *)0L)->member + 1) \ |
| 179 | <= (tag)->hdr.size * 4) |
| 180 | |
| 181 | #define tag_next(t) ((struct tag *)((__u32 *)(t) + (t)->hdr.size)) |
| 182 | #define tag_size(type) ((sizeof(struct tag_header) + sizeof(struct type)) >> 2) |
| 183 | |
| 184 | #define for_each_tag(t,base) \ |
| 185 | for (t = base; t->hdr.size; t = tag_next(t)) |
| 186 | |
| 187 | |
| 188 | #endif /* _UAPI__ASMARM_SETUP_H */ |