FlashMapPei.c

/*++ @file
  PEIM to build GUIDed HOBs for platform specific flash map
 
Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
Portions copyright (c) 2011, Apple Inc. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
 
**/
 
#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 ((DEBUG_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;
  }
 
  PcdSet64S (PcdFlashNvStorageVariableBase64, PcdGet64 (PcdEmuFlashNvStorageVariableBase) + FdFixUp);
  PcdSet64S (PcdFlashNvStorageFtwWorkingBase64, PcdGet64 (PcdEmuFlashNvStorageFtwWorkingBase) + FdFixUp);
  PcdSet64S (PcdFlashNvStorageFtwSpareBase64, PcdGet64 (PcdEmuFlashNvStorageFtwSpareBase) + FdFixUp);
 
  return EFI_SUCCESS;
}