EdkNt32Pkg/RuntimeDxe/FvbServices/FvbInfo.c

   1 /*++
   2
   3 Copyright (c) 2006, Intel Corporation
   4 All rights reserved. This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 Module Name:
  13
  14   FvbInfo.c
  15
  16 Abstract:
  17
  18   Defines data structure that is the volume header found.These data is intent
  19   to decouple FVB driver with FV header.
  20
  21 --*/
  22
  23 #include "FlashLayout.h"
  24
  25 #define FIRMWARE_BLOCK_SIZE 0x10000
  26
  27 typedef struct {
  28   UINT64                      FvLength;
  29   EFI_FIRMWARE_VOLUME_HEADER  FvbInfo;
  30   //
  31   // EFI_FV_BLOCK_MAP_ENTRY    ExtraBlockMap[n];//n=0
  32   //
  33   EFI_FV_BLOCK_MAP_ENTRY      End[1];
  34 } EFI_FVB_MEDIA_INFO;
  35
  36 #define FVB_MEDIA_BLOCK_SIZE    FIRMWARE_BLOCK_SIZE
  37 #define RECOVERY_BOIS_BLOCK_NUM FIRMWARE_BLOCK_NUMBER
  38 #define SYSTEM_NV_BLOCK_NUM     2
  39
  40 EFI_FVB_MEDIA_INFO  mPlatformFvbMediaInfo[] = {
  41   //
  42   // Recovery BOIS FVB
  43   //
  44   {
  45     EFI_WINNT_FIRMWARE_LENGTH,
  46     {
  47       {
  48         0,
  49       },  // ZeroVector[16]
  50       EFI_FIRMWARE_FILE_SYSTEM_GUID,
  51       FVB_MEDIA_BLOCK_SIZE * RECOVERY_BOIS_BLOCK_NUM,
  52       EFI_FVH_SIGNATURE,
  53       EFI_FVB_READ_ENABLED_CAP |
  54         EFI_FVB_READ_STATUS |
  55         EFI_FVB_WRITE_ENABLED_CAP |
  56         EFI_FVB_WRITE_STATUS |
  57         EFI_FVB_ERASE_POLARITY,
  58       sizeof (EFI_FIRMWARE_VOLUME_HEADER) + sizeof (EFI_FV_BLOCK_MAP_ENTRY),
  59       0,  // CheckSum
  60       {
  61         0,
  62       },  // Reserved[3]
  63       1,  // Revision
  64       {
  65         RECOVERY_BOIS_BLOCK_NUM,
  66         FVB_MEDIA_BLOCK_SIZE,
  67       }
  68     },
  69     {
  70       0,
  71       0
  72     }
  73   },
  74   //
  75   // Systen NvStorage FVB
  76   //
  77   {
  78     EFI_WINNT_RUNTIME_UPDATABLE_LENGTH + EFI_WINNT_FTW_SPARE_BLOCK_LENGTH,
  79     {
  80       {
  81         0,
  82       },  // ZeroVector[16]
  83       EFI_SYSTEM_NV_DATA_HOB_GUID,
  84       FVB_MEDIA_BLOCK_SIZE * SYSTEM_NV_BLOCK_NUM,
  85       EFI_FVH_SIGNATURE,
  86       EFI_FVB_READ_ENABLED_CAP |
  87         EFI_FVB_READ_STATUS |
  88         EFI_FVB_WRITE_ENABLED_CAP |
  89         EFI_FVB_WRITE_STATUS |
  90         EFI_FVB_ERASE_POLARITY,
  91       sizeof (EFI_FIRMWARE_VOLUME_HEADER) + sizeof (EFI_FV_BLOCK_MAP_ENTRY),
  92       0,  // CheckSum
  93       {
  94         0,
  95       },  // Reserved[3]
  96       1,  // Revision
  97       {
  98         SYSTEM_NV_BLOCK_NUM,
  99         FVB_MEDIA_BLOCK_SIZE,
 100       }
 101     },
 102     {
 103       0,
 104       0
 105     }
 106   }
 107 };
 108
 109 EFI_STATUS
 110 GetFvbInfo (
 111   IN  UINT64                        FvLength,
 112   OUT EFI_FIRMWARE_VOLUME_HEADER    **FvbInfo
 113   )
 114 {
 115   UINTN Index;
 116
 117   for (Index = 0; Index < sizeof (mPlatformFvbMediaInfo) / sizeof (EFI_FVB_MEDIA_INFO); Index += 1) {
 118     if (mPlatformFvbMediaInfo[Index].FvLength == FvLength) {
 119       *FvbInfo = &mPlatformFvbMediaInfo[Index].FvbInfo;
 120       return EFI_SUCCESS;
 121     }
 122   }
 123
 124   return EFI_NOT_FOUND;
 125 }