1 /* 2 * linux/arch/nds32/include/asm/setup.h 3 * 4 * Copyright (C) 1997-1999 Russell King 5 * Copyright (C) 2008 Andes Technology Corporation 6 * Copyright (C) 2013 Ken Kuo (ken_kuo@andestech.com) 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 * 12 * Structure passed to kernel to tell it about the 13 * hardware it's running on. See Documentation/arm/Setup 14 * for more info. 15 */ 16 #ifndef __ASMNDS32_SETUP_H 17 #define __ASMNDS32_SETUP_H 18 19 #define COMMAND_LINE_SIZE 256 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 /* 71 * this one accidentally used virtual addresses - as such, 72 * it's deprecated. 73 * describes where the compressed ramdisk image lives (virtual address) 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[COMMAND_LINE_SIZE]; 127 }; 128 129 struct tag { 130 struct tag_header hdr; 131 union { 132 struct tag_core core; 133 struct tag_mem32 mem; 134 struct tag_videotext videotext; 135 struct tag_ramdisk ramdisk; 136 struct tag_initrd initrd; 137 struct tag_serialnr serialnr; 138 struct tag_revision revision; 139 struct tag_videolfb videolfb; 140 struct tag_cmdline cmdline; 141 } u; 142 }; 143 144 struct tagtable { 145 u32 tag; 146 int (*parse)(const struct tag *); 147 }; 148 149 #define tag_member_present(tag, member) \ 150 ((unsigned long)(&((struct tag *)0L)->member + 1) \ 151 <= (tag)->hdr.size * 4) 152 153 #define tag_next(t) ((struct tag *)((u32 *)(t) + (t)->hdr.size)) 154 #define tag_size(type) ((sizeof(struct tag_header) + sizeof(struct type)) >> 2) 155 156 #define for_each_tag(t, base) \ 157 for (t = base; t->hdr.size; t = tag_next(t)) 158 159 #ifdef __KERNEL__ 160 161 #define __tag __used __attribute__((__section__(".taglist"))) 162 #define __tagtable(tag, fn) \ 163 static struct tagtable __tagtable_##fn __tag = { tag, fn } 164 165 /* 166 * Memory map description 167 */ 168 #define NR_BANKS 8 169 170 struct meminfo { 171 int nr_banks; 172 struct { 173 unsigned long start; 174 unsigned long size; 175 int node; 176 } bank[NR_BANKS]; 177 }; 178 179 /* 180 * Early command line parameters. 181 */ 182 struct early_params { 183 const char *arg; 184 void (*fn)(char **p); 185 }; 186 187 #define __early_param(name, fn) \ 188 static struct early_params __early_##fn __used \ 189 __attribute__((__section__("__early_param"))) = { name, fn } 190 191 #endif 192 #endif 193