audk/OvmfPkg/PlatformPei/Fv.c

/** @file
  Build FV related hobs for platform.

  Copyright (c) 2006 - 2013, 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
  which 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 "PiPei.h"
#include "Platform.h"
#include <Library/DebugLib.h>
#include <Library/HobLib.h>
#include <Library/PeiServicesLib.h>
#include <Library/PcdLib.h>


/**
  Publish PEI & DXE (Decompressed) Memory based FVs to let PEI
  and DXE know about them.

  @retval EFI_SUCCESS   Platform PEI FVs were initialized successfully.

**/
EFI_STATUS
PeiFvInitialization (
  VOID
  )
{
  BOOLEAN SecureS3Needed;

  DEBUG ((EFI_D_INFO, "Platform PEI Firmware Volume Initialization\n"));

  //
  // Create a memory allocation HOB for the PEI FV.
  //
  // Allocate as ACPI NVS is S3 is supported
  //
  BuildMemoryAllocationHob (
    PcdGet32 (PcdOvmfPeiMemFvBase),
    PcdGet32 (PcdOvmfPeiMemFvSize),
    mS3Supported ? EfiACPIMemoryNVS : EfiBootServicesData
    );

  //
  // Let DXE know about the DXE FV
  //
  BuildFvHob (PcdGet32 (PcdOvmfDxeMemFvBase), PcdGet32 (PcdOvmfDxeMemFvSize));

  SecureS3Needed = mS3Supported && FeaturePcdGet (PcdSmmSmramRequire);

  //
  // Create a memory allocation HOB for the DXE FV.
  //
  // If "secure" S3 is needed, then SEC will decompress both PEI and DXE
  // firmware volumes at S3 resume too, hence we need to keep away the OS from
  // DXEFV as well. Otherwise we only need to keep away DXE itself from the
  // DXEFV area.
  //
  BuildMemoryAllocationHob (
    PcdGet32 (PcdOvmfDxeMemFvBase),
    PcdGet32 (PcdOvmfDxeMemFvSize),
    SecureS3Needed ? EfiACPIMemoryNVS : EfiBootServicesData
    );

  //
  // Additionally, said decompression will use temporary memory above the end
  // of DXEFV, so let's keep away the OS from there too.
  //
  if (SecureS3Needed) {
    UINT32 DxeMemFvEnd;

    DxeMemFvEnd = PcdGet32 (PcdOvmfDxeMemFvBase) +
                  PcdGet32 (PcdOvmfDxeMemFvSize);
    BuildMemoryAllocationHob (
      DxeMemFvEnd,
      PcdGet32 (PcdOvmfDecompressionScratchEnd) - DxeMemFvEnd,
      EfiACPIMemoryNVS
      );
  }

  //
  // Let PEI know about the DXE FV so it can find the DXE Core
  //
  PeiServicesInstallFvInfoPpi (
    NULL,
    (VOID *)(UINTN) PcdGet32 (PcdOvmfDxeMemFvBase),
    PcdGet32 (PcdOvmfDxeMemFvSize),
    NULL,
    NULL
    );

  return EFI_SUCCESS;
}