audk/Nt32Pkg/WinNtFlashMapPei/FlashMap.c

/**@file

Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent

Module Name:

  FlashMap.c
   
Abstract:

  PEIM to build GUIDed HOBs for platform specific flash map

**/

//
// The package level header files this module uses
//
#include <PiPei.h>

#include <WinNtPeim.h>
//
// The protocols, PPI and GUID defintions for this module
//
#include <Ppi/NtFwh.h>

#include <Library/DebugLib.h>
#include <Library/PcdLib.h>
#include <Library/PeiServicesLib.h>

EFI_STATUS
EFIAPI
PeimInitializeFlashMap (
  IN EFI_FFS_FILE_HEADER       *FfsHeader,
  IN 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

--*/
// TODO:    EFI_SUCCESS - add return value to function comment
{
  EFI_STATUS              Status;
  NT_FWH_PPI              *NtFwhPpi;
  EFI_PHYSICAL_ADDRESS    FdBase;
  UINT64                  FdSize;
  EFI_PEI_PPI_DESCRIPTOR  *PpiDescriptor;

  DEBUG ((EFI_D_ERROR, "NT 32 Flash Map PEIM Loaded\n"));

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

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

  //
  // Relocate the base of FV region 
  // 
  if (FdBase >= BASE_4GB) {
    PcdSet64 (PcdFlashNvStorageVariableBase64, PcdGet32 (PcdWinNtFlashNvStorageVariableBase) + (UINT64) FdBase);
    PcdSet64 (PcdFlashNvStorageFtwWorkingBase64, PcdGet32 (PcdWinNtFlashNvStorageFtwWorkingBase) + (UINT64) FdBase);
    PcdSet64 (PcdFlashNvStorageFtwSpareBase64, PcdGet32 (PcdWinNtFlashNvStorageFtwSpareBase) + (UINT64) FdBase);
  } else {
    PcdSet32 (PcdFlashNvStorageVariableBase, PcdGet32 (PcdWinNtFlashNvStorageVariableBase) + (UINT32) FdBase);
    PcdSet32 (PcdFlashNvStorageFtwWorkingBase, PcdGet32 (PcdWinNtFlashNvStorageFtwWorkingBase) + (UINT32) FdBase);
    PcdSet32 (PcdFlashNvStorageFtwSpareBase, PcdGet32 (PcdWinNtFlashNvStorageFtwSpareBase) + (UINT32) FdBase);
  }

  return EFI_SUCCESS;
}