uefi/linaro-edk2/IntelFspWrapperPkg/FspInitPei/FspInitPei.c

/** @file
  This PEIM initialize FSP.

  Copyright (c) 2014 - 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
  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 "FspInitPei.h"

/**
  This is the entrypoint of PEIM

  @param[in] FileHandle  Handle of the file being invoked.
  @param[in] PeiServices Describes the list of possible PEI Services.

  @retval EFI_SUCCESS if it completed successfully.
**/
EFI_STATUS
EFIAPI
FspPeiEntryPoint (
  IN       EFI_PEI_FILE_HANDLE  FileHandle,
  IN CONST EFI_PEI_SERVICES     **PeiServices
  )
{
  FSP_INFO_HEADER      *FspHeader;
  UINT8                PcdFspApiVersion;

  DEBUG ((DEBUG_INFO, "FspPeiEntryPoint\n"));
  PcdFspApiVersion = 1;

  FspHeader = FspFindFspHeader (PcdGet32 (PcdFlashFvFspBase));
  DEBUG ((DEBUG_INFO, "FspHeader - 0x%x\n", FspHeader));
  if (FspHeader == NULL) {
    return EFI_DEVICE_ERROR;
  }

  ASSERT (FspHeader->TempRamInitEntryOffset != 0);
  ASSERT (FspHeader->FspInitEntryOffset != 0);
  ASSERT (FspHeader->NotifyPhaseEntryOffset != 0);

  if ((PcdGet8 (PcdFspApiVersion) >= 2) &&
      (FspHeader->HeaderRevision >= FSP_HEADER_REVISION_2) &&
      (FspHeader->ApiEntryNum >= 6) ) {
    ASSERT (FspHeader->FspMemoryInitEntryOffset != 0);
    ASSERT (FspHeader->TempRamExitEntryOffset != 0);
    ASSERT (FspHeader->FspSiliconInitEntryOffset != 0);
    PcdFspApiVersion = PcdGet8 (PcdFspApiVersion);
  }
  DEBUG ((DEBUG_INFO, "PcdFspApiVersion - 0x%x\n", PcdFspApiVersion));

  if (PcdFspApiVersion == 1) {
    PeiFspInitV1 (FspHeader);
  } else {
    PeiFspInitV2 (FspHeader);
  }

  return EFI_SUCCESS;
}