audk/EmulatorPkg/FirmwareVolumePei/FirmwareVolumePei.c

/*++ @file

Copyright (c) 2006 - 2008, 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 <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/PcdLib.h>

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

Routine Description:
  Perform a call-back into the SEC simulator to get address of the Firmware Hub

Arguments:
  FfsHeader   - Ffs Header available to every PEIM
  PeiServices - General purpose services available to every PEIM.

Returns:
  None

**/
{
  EFI_STATUS                  Status;
  EFI_PEI_PPI_DESCRIPTOR      *PpiDescriptor;
  EMU_THUNK_PPI               *Thunk;
  EFI_PHYSICAL_ADDRESS        FdBase;
  EFI_PHYSICAL_ADDRESS        FdFixUp;
  EFI_FIRMWARE_VOLUME_HEADER  *FvHeader;
  UINT64                      FdSize;
  UINTN                       Index;

  DEBUG ((EFI_D_ERROR, "Unix Firmware Volume 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);

  Index = 0;
  do {
    //
    // Get information about all the FD's in the system
    //
    Status = Thunk->FirmwareDevices (Index, &FdBase, &FdSize, &FdFixUp);
    if (!EFI_ERROR (Status)) {
      //
      // Assume the FD starts with an FV header
      //
      FvHeader = (EFI_FIRMWARE_VOLUME_HEADER *) (UINTN) FdBase;

      //
      // Make an FV Hob for the first FV in the FD
      //
      BuildFvHob (FdBase, FvHeader->FvLength);

      if (Index == 0) {
        //
        // Assume the first FD was produced by the NT32.DSC
        //  All these strange offests are needed to keep in
        //  sync with the FlashMap and NT32.dsc file
        //
        BuildResourceDescriptorHob (
          EFI_RESOURCE_FIRMWARE_DEVICE,
          (EFI_RESOURCE_ATTRIBUTE_PRESENT | EFI_RESOURCE_ATTRIBUTE_INITIALIZED | EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE),
          FdBase,
          (
            FvHeader->FvLength +
            PcdGet32 (PcdFlashNvStorageVariableSize) +
            PcdGet32 (PcdFlashNvStorageFtwWorkingSize) +
            PcdGet32 (PcdFlashNvStorageFtwSpareSize) +
            PcdGet32 (PcdEmuFlashNvStorageEventLogSize)
          )
        );

        //
        // Hard code the address of the spare block and variable services.
        //  Assume it's a hard coded offset from FV0 in FD0.
        //
        FdSize  =
          PcdGet32 (PcdFlashNvStorageVariableSize) +
          PcdGet32 (PcdFlashNvStorageFtwWorkingSize) +
          PcdGet32 (PcdFlashNvStorageFtwSpareSize) +
          PcdGet32 (PcdEmuFlashNvStorageEventLogSize);

        BuildFvHob (FdFixUp + PcdGet64 (PcdEmuFlashNvStorageVariableBase), FdSize);
      } else {
        //
        // For other FD's just map them in.
        //
        BuildResourceDescriptorHob (
          EFI_RESOURCE_FIRMWARE_DEVICE,
          (EFI_RESOURCE_ATTRIBUTE_PRESENT | EFI_RESOURCE_ATTRIBUTE_INITIALIZED | EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE),
          FdBase,
          FdSize
          );
      }
    }

    Index++;
  } while (!EFI_ERROR (Status));

  return Status;
}