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 * SPDX-License-Identifier: GPL-2.0 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 __ASMNDS32_SETUP_H 15 #define __ASMNDS32_SETUP_H 16 17 #define COMMAND_LINE_SIZE 256 18 19 /* The list ends with an ATAG_NONE node. */ 20 #define ATAG_NONE 0x00000000 21 22 struct tag_header { 23 u32 size; 24 u32 tag; 25 }; 26 27 /* The list must start with an ATAG_CORE node */ 28 #define ATAG_CORE 0x54410001 29 30 struct tag_core { 31 u32 flags; /* bit 0 = read-only */ 32 u32 pagesize; 33 u32 rootdev; 34 }; 35 36 /* it is allowed to have multiple ATAG_MEM nodes */ 37 #define ATAG_MEM 0x54410002 38 39 struct tag_mem32 { 40 u32 size; 41 u32 start; /* physical start address */ 42 }; 43 44 /* VGA text type displays */ 45 #define ATAG_VIDEOTEXT 0x54410003 46 47 struct tag_videotext { 48 u8 x; 49 u8 y; 50 u16 video_page; 51 u8 video_mode; 52 u8 video_cols; 53 u16 video_ega_bx; 54 u8 video_lines; 55 u8 video_isvga; 56 u16 video_points; 57 }; 58 59 /* describes how the ramdisk will be used in kernel */ 60 #define ATAG_RAMDISK 0x54410004 61 62 struct tag_ramdisk { 63 u32 flags; /* bit 0 = load, bit 1 = prompt */ 64 u32 size; /* decompressed ramdisk size in _kilo_ bytes */ 65 u32 start; /* starting block of floppy-based RAM disk image */ 66 }; 67 68 /* 69 * this one accidentally used virtual addresses - as such, 70 * it's deprecated. 71 * describes where the compressed ramdisk image lives (virtual address) 72 */ 73 #define ATAG_INITRD 0x54410005 74 75 /* describes where the compressed ramdisk image lives (physical address) */ 76 #define ATAG_INITRD2 0x54420005 77 78 struct tag_initrd { 79 u32 start; /* physical start address */ 80 u32 size; /* size of compressed ramdisk image in bytes */ 81 }; 82 83 /* board serial number. "64 bits should be enough for everybody" */ 84 #define ATAG_SERIAL 0x54410006 85 86 struct tag_serialnr { 87 u32 low; 88 u32 high; 89 }; 90 91 /* board revision */ 92 #define ATAG_REVISION 0x54410007 93 94 struct tag_revision { 95 u32 rev; 96 }; 97 98 /* initial values for vesafb-type framebuffers. see struct screen_info 99 * in include/linux/tty.h 100 */ 101 #define ATAG_VIDEOLFB 0x54410008 102 103 struct tag_videolfb { 104 u16 lfb_width; 105 u16 lfb_height; 106 u16 lfb_depth; 107 u16 lfb_linelength; 108 u32 lfb_base; 109 u32 lfb_size; 110 u8 red_size; 111 u8 red_pos; 112 u8 green_size; 113 u8 green_pos; 114 u8 blue_size; 115 u8 blue_pos; 116 u8 rsvd_size; 117 u8 rsvd_pos; 118 }; 119 120 /* command line: \0 terminated string */ 121 #define ATAG_CMDLINE 0x54410009 122 123 struct tag_cmdline { 124 char cmdline[COMMAND_LINE_SIZE]; 125 }; 126 127 struct tag { 128 struct tag_header hdr; 129 union { 130 struct tag_core core; 131 struct tag_mem32 mem; 132 struct tag_videotext videotext; 133 struct tag_ramdisk ramdisk; 134 struct tag_initrd initrd; 135 struct tag_serialnr serialnr; 136 struct tag_revision revision; 137 struct tag_videolfb videolfb; 138 struct tag_cmdline cmdline; 139 } u; 140 }; 141 142 struct tagtable { 143 u32 tag; 144 int (*parse)(const struct tag *); 145 }; 146 147 #define tag_member_present(tag, member) \ 148 ((unsigned long)(&((struct tag *)0L)->member + 1) \ 149 <= (tag)->hdr.size * 4) 150 151 #define tag_next(t) ((struct tag *)((u32 *)(t) + (t)->hdr.size)) 152 #define tag_size(type) ((sizeof(struct tag_header) + sizeof(struct type)) >> 2) 153 154 #define for_each_tag(t, base) \ 155 for (t = base; t->hdr.size; t = tag_next(t)) 156 157 #ifdef __KERNEL__ 158 159 #define __tag __used __attribute__((__section__(".taglist"))) 160 #define __tagtable(tag, fn) \ 161 static struct tagtable __tagtable_##fn __tag = { tag, fn } 162 163 /* 164 * Memory map description 165 */ 166 #define NR_BANKS 8 167 168 struct meminfo { 169 int nr_banks; 170 struct { 171 unsigned long start; 172 unsigned long size; 173 int node; 174 } bank[NR_BANKS]; 175 }; 176 177 /* 178 * Early command line parameters. 179 */ 180 struct early_params { 181 const char *arg; 182 void (*fn)(char **p); 183 }; 184 185 #define __early_param(name, fn) \ 186 static struct early_params __early_##fn __used \ 187 __attribute__((__section__("__early_param"))) = { name, fn } 188 189 #endif 190 #endif 191