1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * linux/arch/nds32/include/asm/setup.h 4 * 5 * Copyright (C) 1997-1999 Russell King 6 * Copyright (C) 2008 Andes Technology Corporation 7 * Copyright (C) 2013 Ken Kuo (ken_kuo@andestech.com) 8 * 9 * Structure passed to kernel to tell it about the 10 * hardware it's running on. See Documentation/arm/Setup 11 * for more info. 12 */ 13 #ifndef __ASMNDS32_SETUP_H 14 #define __ASMNDS32_SETUP_H 15 16 #define COMMAND_LINE_SIZE 256 17 18 /* The list ends with an ATAG_NONE node. */ 19 #define ATAG_NONE 0x00000000 20 21 struct tag_header { 22 u32 size; 23 u32 tag; 24 }; 25 26 /* The list must start with an ATAG_CORE node */ 27 #define ATAG_CORE 0x54410001 28 29 struct tag_core { 30 u32 flags; /* bit 0 = read-only */ 31 u32 pagesize; 32 u32 rootdev; 33 }; 34 35 /* it is allowed to have multiple ATAG_MEM nodes */ 36 #define ATAG_MEM 0x54410002 37 38 struct tag_mem32 { 39 u32 size; 40 u32 start; /* physical start address */ 41 }; 42 43 /* VGA text type displays */ 44 #define ATAG_VIDEOTEXT 0x54410003 45 46 struct tag_videotext { 47 u8 x; 48 u8 y; 49 u16 video_page; 50 u8 video_mode; 51 u8 video_cols; 52 u16 video_ega_bx; 53 u8 video_lines; 54 u8 video_isvga; 55 u16 video_points; 56 }; 57 58 /* describes how the ramdisk will be used in kernel */ 59 #define ATAG_RAMDISK 0x54410004 60 61 struct tag_ramdisk { 62 u32 flags; /* bit 0 = load, bit 1 = prompt */ 63 u32 size; /* decompressed ramdisk size in _kilo_ bytes */ 64 u32 start; /* starting block of floppy-based RAM disk image */ 65 }; 66 67 /* 68 * this one accidentally used virtual addresses - as such, 69 * it's deprecated. 70 * describes where the compressed ramdisk image lives (virtual address) 71 */ 72 #define ATAG_INITRD 0x54410005 73 74 /* describes where the compressed ramdisk image lives (physical address) */ 75 #define ATAG_INITRD2 0x54420005 76 77 struct tag_initrd { 78 u32 start; /* physical start address */ 79 u32 size; /* size of compressed ramdisk image in bytes */ 80 }; 81 82 /* board serial number. "64 bits should be enough for everybody" */ 83 #define ATAG_SERIAL 0x54410006 84 85 struct tag_serialnr { 86 u32 low; 87 u32 high; 88 }; 89 90 /* board revision */ 91 #define ATAG_REVISION 0x54410007 92 93 struct tag_revision { 94 u32 rev; 95 }; 96 97 /* initial values for vesafb-type framebuffers. see struct screen_info 98 * in include/linux/tty.h 99 */ 100 #define ATAG_VIDEOLFB 0x54410008 101 102 struct tag_videolfb { 103 u16 lfb_width; 104 u16 lfb_height; 105 u16 lfb_depth; 106 u16 lfb_linelength; 107 u32 lfb_base; 108 u32 lfb_size; 109 u8 red_size; 110 u8 red_pos; 111 u8 green_size; 112 u8 green_pos; 113 u8 blue_size; 114 u8 blue_pos; 115 u8 rsvd_size; 116 u8 rsvd_pos; 117 }; 118 119 /* command line: \0 terminated string */ 120 #define ATAG_CMDLINE 0x54410009 121 122 struct tag_cmdline { 123 char cmdline[COMMAND_LINE_SIZE]; 124 }; 125 126 struct tag { 127 struct tag_header hdr; 128 union { 129 struct tag_core core; 130 struct tag_mem32 mem; 131 struct tag_videotext videotext; 132 struct tag_ramdisk ramdisk; 133 struct tag_initrd initrd; 134 struct tag_serialnr serialnr; 135 struct tag_revision revision; 136 struct tag_videolfb videolfb; 137 struct tag_cmdline cmdline; 138 } u; 139 }; 140 141 struct tagtable { 142 u32 tag; 143 int (*parse)(const struct tag *); 144 }; 145 146 #define tag_member_present(tag, member) \ 147 ((unsigned long)(&((struct tag *)0L)->member + 1) \ 148 <= (tag)->hdr.size * 4) 149 150 #define tag_next(t) ((struct tag *)((u32 *)(t) + (t)->hdr.size)) 151 #define tag_size(type) ((sizeof(struct tag_header) + sizeof(struct type)) >> 2) 152 153 #define for_each_tag(t, base) \ 154 for (t = base; t->hdr.size; t = tag_next(t)) 155 156 #ifdef __KERNEL__ 157 158 #define __tag __used __attribute__((__section__(".taglist"))) 159 #define __tagtable(tag, fn) \ 160 static struct tagtable __tagtable_##fn __tag = { tag, fn } 161 162 /* 163 * Memory map description 164 */ 165 #define NR_BANKS 8 166 167 struct meminfo { 168 int nr_banks; 169 struct { 170 unsigned long start; 171 unsigned long size; 172 int node; 173 } bank[NR_BANKS]; 174 }; 175 176 /* 177 * Early command line parameters. 178 */ 179 struct early_params { 180 const char *arg; 181 void (*fn)(char **p); 182 }; 183 184 #define __early_param(name, fn) \ 185 static struct early_params __early_##fn __used \ 186 __attribute__((__section__("__early_param"))) = { name, fn } 187 188 #endif 189 #endif 190