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 LINUX_ATAG_MAX_OFFSET     (PcdGet32(PcdSystemMemoryBase) + PcdGet32(PcdArmLinuxAtagMaxOffset))
  19 #define LINUX_KERNEL_MAX_OFFSET   (PcdGet32(PcdSystemMemoryBase) + PcdGet32(PcdArmLinuxKernelMaxOffset))
  20
  21 #define ATAG_MAX_SIZE       0x3000
  22
  23 /* ATAG : list of possible tags */
  24 #define ATAG_NONE            0x00000000
  25 #define ATAG_CORE            0x54410001
  26 #define ATAG_MEM             0x54410002
  27 #define ATAG_VIDEOTEXT       0x54410003
  28 #define ATAG_RAMDISK         0x54410004
  29 #define ATAG_INITRD2         0x54420005
  30 #define ATAG_SERIAL          0x54410006
  31 #define ATAG_REVISION        0x54410007
  32 #define ATAG_VIDEOLFB        0x54410008
  33 #define ATAG_CMDLINE         0x54410009
  34 #define ATAG_ARM_MP_CORE     0x5441000A
  35
  36 /* structures for each atag */
  37 typedef struct {
  38   UINT32  size; /* length of tag in words including this header */
  39   UINT32  type;  /* tag type */
  40 } LINUX_ATAG_HEADER;
  41
  42 typedef struct {
  43   UINT32  flags;
  44   UINT32  pagesize;
  45   UINT32  rootdev;
  46 } LINUX_ATAG_CORE;
  47
  48 typedef struct {
  49   UINT32  size;
  50   UINTN  start;
  51 } LINUX_ATAG_MEM;
  52
  53 typedef struct {
  54   UINT8   x;
  55   UINT8   y;
  56   UINT16  video_page;
  57   UINT8   video_mode;
  58   UINT8   video_cols;
  59   UINT16  video_ega_bx;
  60   UINT8   video_lines;
  61   UINT8   video_isvga;
  62   UINT16  video_points;
  63 } LINUX_ATAG_VIDEOTEXT;
  64
  65 typedef struct {
  66   UINT32  flags;
  67   UINT32  size;
  68   UINTN  start;
  69 } LINUX_ATAG_RAMDISK;
  70
  71 typedef struct {
  72   UINT32  start;
  73   UINT32  size;
  74 } LINUX_ATAG_INITRD2;
  75
  76 typedef struct {
  77   UINT32  low;
  78   UINT32  high;
  79 } LINUX_ATAG_SERIALNR;
  80
  81 typedef struct {
  82   UINT32  rev;
  83 } LINUX_ATAG_REVISION;
  84
  85 typedef struct {
  86   UINT16  lfb_width;
  87   UINT16  lfb_height;
  88   UINT16  lfb_depth;
  89   UINT16  lfb_linelength;
  90   UINT32  lfb_base;
  91   UINT32  lfb_size;
  92   UINT8   red_size;
  93   UINT8   red_pos;
  94   UINT8   green_size;
  95   UINT8   green_pos;
  96   UINT8   blue_size;
  97   UINT8   blue_pos;
  98   UINT8   rsvd_size;
  99   UINT8   rsvd_pos;
 100 } LINUX_ATAG_VIDEOLFB;
 101
 102 typedef struct {
 103   CHAR8   cmdline[1];
 104 } LINUX_ATAG_CMDLINE;
 105
 106 typedef struct {
 107   LINUX_ATAG_HEADER header;
 108   union {
 109     LINUX_ATAG_CORE         core_tag;
 110     LINUX_ATAG_MEM          mem_tag;
 111     LINUX_ATAG_VIDEOTEXT    videotext_tag;
 112     LINUX_ATAG_RAMDISK      ramdisk_tag;
 113     LINUX_ATAG_INITRD2      initrd2_tag;
 114     LINUX_ATAG_SERIALNR     serialnr_tag;
 115     LINUX_ATAG_REVISION     revision_tag;
 116     LINUX_ATAG_VIDEOLFB     videolfb_tag;
 117     LINUX_ATAG_CMDLINE      cmdline_tag;
 118   } body;
 119 } LINUX_ATAG;
 120
 121 typedef VOID (*LINUX_KERNEL)(UINT32 Zero, UINT32 Arch, UINTN ParametersBase);
 122
 123 #define next_tag_address(t)     ((LINUX_ATAG*)((UINT32)(t) + (((t)->header.size) << 2) ))
 124 #define tag_size(type)          ((UINT32)((sizeof(LINUX_ATAG_HEADER) + sizeof(type)) >> 2))
 125
 126 #endif