audk/EmulatorPkg/FlashMapPei/FlashMapPei.c

/*++ @file
  PEIM to build GUIDed HOBs for platform specific flash map

Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
Portions copyright (c) 2011, Apple Inc. All rights reserved.
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 <Guid/SystemNvDataGuid.h>
#include <Ppi/EmuThunk.h>

#include <Library/DebugLib.h>
#include <Library/PeimEntryPoint.h>
#include <Library/HobLib.h>
#include <Library/PeiServicesLib.h>
#include <Library/PeiServicesTablePointerLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/PcdLib.h>

EFI_STATUS
EFIAPI
PeimInitializeFlashMap (
  IN       EFI_PEI_FILE_HANDLE       FileHandle,
  IN CONST EFI_PEI_SERVICES          **PeiServices
  )
/*++

Routine Description:
  Build GUIDed HOBs for platform specific flash map

Arguments:
  FfsHeader   - A pointer to the EFI_FFS_FILE_HEADER structure.
  PeiServices - General purpose services available to every PEIM.

Returns:
  EFI_STATUS

**/
{
  EFI_STATUS              Status;
  EMU_THUNK_PPI           *Thunk;
  EFI_PEI_PPI_DESCRIPTOR  *PpiDescriptor;
  EFI_PHYSICAL_ADDRESS    FdBase;
  EFI_PHYSICAL_ADDRESS    FdFixUp;
  UINT64                  FdSize;

  DEBUG ((EFI_D_ERROR, "EmulatorPkg Flash Map PEIM Loaded\n"));

  //
  // Get the Fwh Information PPI
  //
  Status = PeiServicesLocatePpi (
            &gEmuThunkPpiGuid, // GUID
            0,                 // INSTANCE
            &PpiDescriptor,     // EFI_PEI_PPI_DESCRIPTOR
            (VOID **)&Thunk       // PPI
            );
  ASSERT_EFI_ERROR (Status);

  //
  // Assume that FD0 contains the Flash map.
  //
  Status = Thunk->FirmwareDevices (0, &FdBase, &FdSize, &FdFixUp);
  if (EFI_ERROR (Status)) {
    return Status;
  }

  PcdSet64 (PcdFlashNvStorageVariableBase64, PcdGet64 (PcdEmuFlashNvStorageVariableBase) + FdFixUp);
  PcdSet64 (PcdFlashNvStorageFtwWorkingBase64, PcdGet64 (PcdEmuFlashNvStorageFtwWorkingBase) + FdFixUp);
  PcdSet64 (PcdFlashNvStorageFtwSpareBase64, PcdGet64 (PcdEmuFlashNvStorageFtwSpareBase) + FdFixUp);

  return EFI_SUCCESS;
}