xref: /device/linaro/bootloader/edk2/Vlv2TbltDevicePkg/PlatformCpuInfoDxe/PlatformCpuInfoDxe.c

/** @file

  Copyright (c) 2004  - 2014, Intel Corporation. All rights reserved.<BR>


  This program and the accompanying materials are licensed and made available under

  the terms and conditions of the BSD License that 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:

  PlatformCpuInfoDxe.c

Abstract:
  Platform Cpu Info driver to public platform related HOB data

--*/

#include "PlatformCpuInfoDxe.h"

CHAR16    EfiPlatformCpuInfoVariable[] = L"PlatformCpuInfo";

EFI_STATUS
EFIAPI
PlatformCpuInfoInit (
  IN EFI_HANDLE                         ImageHandle,
  IN EFI_SYSTEM_TABLE                   *SystemTable
  )
{
  EFI_STATUS                  Status;
  EFI_PLATFORM_CPU_INFO       *PlatformCpuInfoPtr;
  EFI_PEI_HOB_POINTERS        GuidHob;

  //
  // Get Platform Cpu Info HOB
  //
  GuidHob.Raw = GetHobList ();
  while ((GuidHob.Raw = GetNextGuidHob (&gEfiPlatformCpuInfoGuid, GuidHob.Raw)) != NULL) {
    PlatformCpuInfoPtr = GET_GUID_HOB_DATA (GuidHob.Guid);
    GuidHob.Raw = GET_NEXT_HOB (GuidHob);

      //
      // Write the Platform CPU Info to volatile memory for runtime purposes.
      // This must be done in its own driver because SetVariable protocol is dependent on chipset,
      // which is dependent on CpuIo, PlatformInfo, and Metronome.
      //
      Status = gRT->SetVariable(
                      EfiPlatformCpuInfoVariable,
                      &gEfiVlv2VariableGuid,
                      EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
                      sizeof(EFI_PLATFORM_CPU_INFO),
                      PlatformCpuInfoPtr
                      );
      if (EFI_ERROR(Status)) {
        return Status;
      }
  }

   return EFI_SUCCESS;
}