audk/ArmPkg/Drivers/CpuPei/CpuPei.c

/**@file

Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2011 Hewlett Packard Corporation. All rights reserved.<BR>
Copyright (c) 2011-2013, ARM Limited. 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.

Module Name:

  MemoryInit.c

Abstract:

  PEIM to provide fake memory init

**/



//
// The package level header files this module uses
//
#include <PiPei.h>
//
// The protocols, PPI and GUID defintions for this module
//
#include <Ppi/ArmMpCoreInfo.h>

//
// The Library classes this module consumes
//
#include <Library/DebugLib.h>
#include <Library/PeimEntryPoint.h>
#include <Library/PeiServicesLib.h>
#include <Library/PcdLib.h>
#include <Library/HobLib.h>
#include <Library/ArmLib.h>

/*++

Routine Description:

Arguments:

  FileHandle  - Handle of the file being invoked.
  PeiServices - Describes the list of possible PEI Services.

Returns:

  Status -  EFI_SUCCESS if the boot mode could be set

--*/
EFI_STATUS
EFIAPI
InitializeCpuPeim (
  IN       EFI_PEI_FILE_HANDLE  FileHandle,
  IN CONST EFI_PEI_SERVICES     **PeiServices
  )
{
  EFI_STATUS              Status;
  ARM_MP_CORE_INFO_PPI    *ArmMpCoreInfoPpi;
  UINTN                   ArmCoreCount;
  ARM_CORE_INFO           *ArmCoreInfoTable;

  // Enable program flow prediction, if supported.
  ArmEnableBranchPrediction ();

  // Publish the CPU memory and io spaces sizes
  BuildCpuHob (PcdGet8 (PcdPrePiCpuMemorySize), PcdGet8 (PcdPrePiCpuIoSize));

  // Only MP Core platform need to produce gArmMpCoreInfoPpiGuid
  Status = PeiServicesLocatePpi (&gArmMpCoreInfoPpiGuid, 0, NULL, (VOID**)&ArmMpCoreInfoPpi);
  if (!EFI_ERROR(Status)) {
    // Build the MP Core Info Table
    ArmCoreCount = 0;
    Status = ArmMpCoreInfoPpi->GetMpCoreInfo (&ArmCoreCount, &ArmCoreInfoTable);
    if (!EFI_ERROR(Status) && (ArmCoreCount > 0)) {
      // Build MPCore Info HOB
      BuildGuidDataHob (&gArmMpCoreInfoGuid, ArmCoreInfoTable, sizeof (ARM_CORE_INFO) * ArmCoreCount);
    }
  }

  return EFI_SUCCESS;
}