uboot/arch/nds32/include/asm/setup.h
<<
>>
Prefs
   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
  22struct 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
  30struct 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
  39struct tag_mem32 {
  40        u32     size;
  41        u32     start;  /* physical start address */
  42};
  43
  44/* VGA text type displays */
  45#define ATAG_VIDEOTEXT  0x54410003
  46
  47struct 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
  62struct 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
  78struct 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
  86struct tag_serialnr {
  87        u32 low;
  88        u32 high;
  89};
  90
  91/* board revision */
  92#define ATAG_REVISION   0x54410007
  93
  94struct 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
 103struct 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
 123struct tag_cmdline {
 124        char    cmdline[COMMAND_LINE_SIZE];
 125};
 126
 127struct 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
 142struct 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) \
 161static struct tagtable __tagtable_##fn __tag = { tag, fn }
 162
 163/*
 164 * Memory map description
 165 */
 166#define NR_BANKS 8
 167
 168struct 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 */
 180struct early_params {
 181        const char *arg;
 182        void (*fn)(char **p);
 183};
 184
 185#define __early_param(name, fn)                                 \
 186static struct early_params __early_##fn __used  \
 187__attribute__((__section__("__early_param"))) = { name, fn }
 188
 189#endif
 190#endif
 191