audk/Vlv2TbltDevicePkg/FvbRuntimeDxe/FvbInfo.c

/**@file
  Defines data structure that is the volume header found.
  These data is intent to decouple FVB driver with FV header.

Copyright (c) 2006  - 2015, Intel Corporation. All rights reserved.<BR>
                                                                                   
  This program and the accompanying materials are licensed and made available under
  the terms and conditions of the BSD License that accompanies this distribution.  
  The full text of the license may be found at                                     
  http://opensource.org/licenses/bsd-license.php.                                  
                                                                                   
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,            
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.    
                                                                                   

**/

#include <PiDxe.h>
#include <Protocol/FirmwareVolumeBlock.h>
#include <Library/PcdLib.h>
#include <Library/DebugLib.h>
#include <Library/BaseLib.h>
#include <Guid/FirmwareFileSystem2.h>
#include <Guid/SystemNvDataGuid.h>

#define FIRMWARE_BLOCK_SIZE         0x8000
#define FVB_MEDIA_BLOCK_SIZE        (FIRMWARE_BLOCK_SIZE * 2)

#define FV_RECOVERY_BASE_ADDRESS    FixedPcdGet32(PcdFlashFvRecoveryBase)
#define RECOVERY_BIOS_BLOCK_NUM     (FixedPcdGet32(PcdFlashFvRecoverySize) / FVB_MEDIA_BLOCK_SIZE)

#define FV_MAIN_BASE_ADDRESS        FixedPcdGet32(PcdFlashFvMainBase)
#define MAIN_BIOS_BLOCK_NUM         (FixedPcdGet32(PcdFlashFvMainSize) / FVB_MEDIA_BLOCK_SIZE)

#define NV_STORAGE_BASE_ADDRESS     FixedPcdGet32(PcdFlashNvStorageVariableBase)
#define SYSTEM_NV_BLOCK_NUM         ((FixedPcdGet32(PcdFlashNvStorageVariableSize)+ FixedPcdGet32(PcdFlashNvStorageFtwWorkingSize) + FixedPcdGet32(PcdFlashNvStorageFtwSpareSize))/ FVB_MEDIA_BLOCK_SIZE)

typedef struct {
  EFI_PHYSICAL_ADDRESS        BaseAddress;
  EFI_FIRMWARE_VOLUME_HEADER  FvbInfo;
  EFI_FV_BLOCK_MAP_ENTRY      End[1];
} EFI_FVB2_MEDIA_INFO;

//
// This data structure contains a template of all correct FV headers, which is used to restore
// Fv header if it's corrupted.
//
EFI_FVB2_MEDIA_INFO mPlatformFvbMediaInfo[] = {
  //
  // Main BIOS FVB
  //
  {
    FV_MAIN_BASE_ADDRESS,
    {
      {0,}, //ZeroVector[16]
      EFI_FIRMWARE_FILE_SYSTEM2_GUID,
      FVB_MEDIA_BLOCK_SIZE * MAIN_BIOS_BLOCK_NUM,
      EFI_FVH_SIGNATURE,
      0x0004feff, // check MdePkg/Include/Pi/PiFirmwareVolume.h for details on EFI_FVB_ATTRIBUTES_2
      sizeof (EFI_FIRMWARE_VOLUME_HEADER) + sizeof (EFI_FV_BLOCK_MAP_ENTRY),
      0,    //CheckSum which will be calucated dynamically.
      0,    //ExtHeaderOffset
      {0,}, //Reserved[1]
      2,    //Revision
      {
        {
          MAIN_BIOS_BLOCK_NUM,
          FVB_MEDIA_BLOCK_SIZE,
        }
      }
    },
    {
      {
        0,
        0
      }
    }
  },

  //
  // Systen NvStorage FVB
  //
  {
    NV_STORAGE_BASE_ADDRESS,
    {
      {0,}, //ZeroVector[16]
      EFI_SYSTEM_NV_DATA_FV_GUID,
      FVB_MEDIA_BLOCK_SIZE * SYSTEM_NV_BLOCK_NUM,
      EFI_FVH_SIGNATURE,
      0x0004feff, // check MdePkg/Include/Pi/PiFirmwareVolume.h for details on EFI_FVB_ATTRIBUTES_2
      sizeof (EFI_FIRMWARE_VOLUME_HEADER) + sizeof (EFI_FV_BLOCK_MAP_ENTRY),
      0,    //CheckSum which will be calucated dynamically.
      0,    //ExtHeaderOffset
      {0,}, //Reserved[1]
      2,    //Revision
      {
        {
          SYSTEM_NV_BLOCK_NUM,
          FVB_MEDIA_BLOCK_SIZE,
        }
      }
    },
    {
      {
        0,
        0
      }
    }
  },

  //
  // Recovery BIOS FVB
  //
  {
    FV_RECOVERY_BASE_ADDRESS,
    {
      {0,}, //ZeroVector[16]
      EFI_FIRMWARE_FILE_SYSTEM2_GUID,
      FVB_MEDIA_BLOCK_SIZE * RECOVERY_BIOS_BLOCK_NUM,
      EFI_FVH_SIGNATURE,
      0x0004feff, // check MdePkg/Include/Pi/PiFirmwareVolume.h for details on EFI_FVB_ATTRIBUTES_2
      sizeof (EFI_FIRMWARE_VOLUME_HEADER) + sizeof (EFI_FV_BLOCK_MAP_ENTRY),
      0,    //CheckSum which will be calucated dynamically.
      0,    //ExtHeaderOffset
      {0,}, //Reserved[1]
      2,    //Revision
      {
        {
          RECOVERY_BIOS_BLOCK_NUM,
          FVB_MEDIA_BLOCK_SIZE,
        }
      }
    },
    {
      {
        0,
        0
      }
    }
  }
};

EFI_STATUS
GetFvbInfo (
  IN  EFI_PHYSICAL_ADDRESS         FvBaseAddress,
  OUT EFI_FIRMWARE_VOLUME_HEADER   **FvbInfo
  )
{
  UINTN                       Index;
  EFI_FIRMWARE_VOLUME_HEADER  *FvHeader;

  for (Index = 0; Index < sizeof (mPlatformFvbMediaInfo) / sizeof (EFI_FVB2_MEDIA_INFO); Index += 1) {
    if (mPlatformFvbMediaInfo[Index].BaseAddress == FvBaseAddress) {
      FvHeader =  &mPlatformFvbMediaInfo[Index].FvbInfo;

      //
      // Update the checksum value of FV header.
      //
      FvHeader->Checksum = CalculateCheckSum16 ((UINT16 *) FvHeader, FvHeader->HeaderLength);

      *FvbInfo = FvHeader;

      DEBUG ((EFI_D_INFO, "\nBaseAddr: 0x%lx \n", FvBaseAddress));
      DEBUG ((EFI_D_INFO, "FvLength: 0x%lx \n", (*FvbInfo)->FvLength));
      DEBUG ((EFI_D_INFO, "HeaderLength: 0x%x \n", (*FvbInfo)->HeaderLength));
      DEBUG ((EFI_D_INFO, "FvBlockMap[0].NumBlocks: 0x%x \n", (*FvbInfo)->BlockMap[0].NumBlocks));
      DEBUG ((EFI_D_INFO, "FvBlockMap[0].BlockLength: 0x%x \n", (*FvbInfo)->BlockMap[0].Length));
      DEBUG ((EFI_D_INFO, "FvBlockMap[1].NumBlocks: 0x%x \n",   (*FvbInfo)->BlockMap[1].NumBlocks));
      DEBUG ((EFI_D_INFO, "FvBlockMap[1].BlockLength: 0x%x \n\n", (*FvbInfo)->BlockMap[1].Length));

      return EFI_SUCCESS;
    }
  }
  return EFI_NOT_FOUND;
}