ArmPkg/Library/BdsLib/BdsLinuxLoader.h

   1 /** @file
   2 *
   3 *  Copyright (c) 2011, ARM Limited. All rights reserved.
   4 *
   5 *  This program and the accompanying materials
   6 *  are licensed and made available under the terms and conditions of the BSD License
   7 *  which accompanies this distribution.  The full text of the license may be found at
   8 *  http://opensource.org/licenses/bsd-license.php
   9 *
  10 *  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 *  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12 *
  13 **/
  14
  15 #ifndef __BDSLINUXLOADER_H
  16 #define __BDSLINUXLOADER_H
  17
  18 #define ATAG_MAX_SIZE       0x4000
  19 //PcdKernelParamsMaxMemorySize
  20
  21 /* ATAG : list of possible tags */
  22 #define ATAG_NONE            0x00000000
  23 #define ATAG_CORE            0x54410001
  24 #define ATAG_MEM             0x54410002
  25 #define ATAG_VIDEOTEXT       0x54410003
  26 #define ATAG_RAMDISK         0x54410004
  27 #define ATAG_INITRD2         0x54420005
  28 #define ATAG_SERIAL          0x54410006
  29 #define ATAG_REVISION        0x54410007
  30 #define ATAG_VIDEOLFB        0x54410008
  31 #define ATAG_CMDLINE         0x54410009
  32 #define ATAG_ARM_MP_CORE     0x5441000A
  33
  34 // Some system addresses
  35 // These should probably come from the platform header file or from pcd values
  36 #define DRAM_BASE            0x10000000
  37 #define ZIMAGE_LOAD_ADDRESS  (DRAM_BASE + 0x8000)
  38 #define INITRD_LOAD_ADDRESS  (DRAM_BASE + 0x800000)
  39
  40 #define SIZE_1B              0x00000001
  41 #define SIZE_2B              0x00000002
  42 #define SIZE_4B              0x00000004
  43 #define SIZE_8B              0x00000008
  44 #define SIZE_16B             0x00000010
  45 #define SIZE_32B             0x00000020
  46 #define SIZE_64B             0x00000040
  47 #define SIZE_128B            0x00000080
  48 #define SIZE_256B            0x00000100
  49 #define SIZE_512B            0x00000200
  50 #define SIZE_1KB             0x00000400
  51 #define SIZE_2KB             0x00000800
  52 #define SIZE_4KB             0x00001000
  53 #define SIZE_8KB             0x00002000
  54 #define SIZE_16KB            0x00004000
  55 #define SIZE_32KB            0x00008000
  56 #define SIZE_64KB            0x00010000
  57 #define SIZE_128KB           0x00020000
  58 #define SIZE_256KB           0x00040000
  59 #define SIZE_512KB           0x00080000
  60 #define SIZE_1MB             0x00100000
  61 #define SIZE_2MB             0x00200000
  62 #define SIZE_4MB             0x00400000
  63 #define SIZE_8MB             0x00800000
  64 #define SIZE_16MB            0x01000000
  65 #define SIZE_32MB            0x02000000
  66 #define SIZE_64MB            0x04000000
  67 #define SIZE_100MB           0x06400000
  68 #define SIZE_128MB           0x08000000
  69 #define SIZE_256MB           0x10000000
  70 #define SIZE_512MB           0x20000000
  71 #define SIZE_1GB             0x40000000
  72 #define SIZE_2GB             0x80000000
  73
  74 /* structures for each atag */
  75 struct atag_header {
  76   UINT32  size; /* length of tag in words including this header */
  77   UINT32  type;  /* tag type */
  78 };
  79
  80 struct atag_core {
  81   UINT32  flags;
  82   UINT32  pagesize;
  83   UINT32  rootdev;
  84 };
  85
  86 struct atag_mem {
  87   UINT32  size;
  88   UINTN  start;
  89 };
  90
  91 struct atag_videotext {
  92   UINT8   x;
  93   UINT8   y;
  94   UINT16  video_page;
  95   UINT8   video_mode;
  96   UINT8   video_cols;
  97   UINT16  video_ega_bx;
  98   UINT8   video_lines;
  99   UINT8   video_isvga;
 100   UINT16  video_points;
 101 };
 102
 103 struct atag_ramdisk {
 104   UINT32  flags;
 105   UINT32  size;
 106   UINTN  start;
 107 };
 108
 109 struct atag_initrd2 {
 110   UINT32  start;
 111   UINT32  size;
 112 };
 113
 114 struct atag_serialnr {
 115   UINT32  low;
 116   UINT32  high;
 117 };
 118
 119 struct atag_revision {
 120   UINT32  rev;
 121 };
 122
 123 struct atag_videolfb {
 124   UINT16  lfb_width;
 125   UINT16  lfb_height;
 126   UINT16  lfb_depth;
 127   UINT16  lfb_linelength;
 128   UINT32  lfb_base;
 129   UINT32  lfb_size;
 130   UINT8   red_size;
 131   UINT8   red_pos;
 132   UINT8   green_size;
 133   UINT8   green_pos;
 134   UINT8   blue_size;
 135   UINT8   blue_pos;
 136   UINT8   rsvd_size;
 137   UINT8   rsvd_pos;
 138 };
 139
 140 struct atag_cmdline {
 141   CHAR8   cmdline[1];
 142 };
 143
 144 struct atag {
 145   struct atag_header header;
 146   union {
 147     struct atag_core         core_tag;
 148     struct atag_mem          mem_tag;
 149     struct atag_videotext    videotext_tag;
 150     struct atag_ramdisk      ramdisk_tag;
 151     struct atag_initrd2      initrd2_tag;
 152     struct atag_serialnr     serialnr_tag;
 153     struct atag_revision     revision_tag;
 154     struct atag_videolfb     videolfb_tag;
 155     struct atag_cmdline      cmdline_tag;
 156   } body;
 157 };
 158
 159 #define next_tag_address(t)     ((struct atag *)((UINT32)(t) + (((t)->header.size) << 2) ))
 160 #define tag_size(type)  ((UINT32)((sizeof(struct atag_header) + sizeof(struct type)) >> 2))
 161
 162 STATIC struct atag *Params; /* used to point at the current tag */
 163
 164 #endif
 165