UefiCpuPkg/CpuFeatures/CpuFeaturesPei.c

   1 /** @file
   2   CPU Features PEIM driver to initialize CPU features.
   3
   4   Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
   5   This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include <PiPei.h>
  16
  17 #include <Library/BaseLib.h>
  18 #include <Library/DebugLib.h>
  19 #include <Library/PeiServicesLib.h>
  20 #include <Library/RegisterCpuFeaturesLib.h>
  21
  22 #include <Guid/CpuFeaturesInitDone.h>
  23
  24 EFI_PEI_PPI_DESCRIPTOR           mPeiCpuFeaturesInitDonePpiDesc = {
  25   (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
  26   &gEdkiiCpuFeaturesInitDoneGuid,
  27   NULL
  28 };
  29
  30 /**
  31   CPU Features driver entry point function.
  32
  33   It will perform CPU features initialization, except for
  34   PcdCpuFeaturesInitOnS3Resume is FALSE on S3 resume.
  35
  36   @param  FileHandle    Handle of the file being invoked.
  37   @param  PeiServices   Describes the list of possible PEI Services.
  38
  39   @retval EFI_SUCCESS   CPU Features is initialized successfully.
  40 **/
  41 EFI_STATUS
  42 EFIAPI
  43 CpuFeaturesPeimInitialize (
  44   IN       EFI_PEI_FILE_HANDLE  FileHandle,
  45   IN CONST EFI_PEI_SERVICES     **PeiServices
  46   )
  47 {
  48   EFI_STATUS                 Status;
  49   EFI_BOOT_MODE              BootMode;
  50
  51   Status = PeiServicesGetBootMode (&BootMode);
  52   ASSERT_EFI_ERROR (Status);
  53
  54   if (BootMode == BOOT_ON_S3_RESUME &&
  55       !PcdGetBool (PcdCpuFeaturesInitOnS3Resume)) {
  56     //
  57     // Does nothing when if PcdCpuFeaturesInitOnS3Resume is FLASE
  58     // on S3 boot mode
  59     //
  60     return EFI_SUCCESS;
  61   }
  62
  63   CpuFeaturesDetect ();
  64
  65   CpuFeaturesInitialize ();
  66
  67   //
  68   // Install CPU Features Init Done PPI
  69   //
  70   Status = PeiServicesInstallPpi(&mPeiCpuFeaturesInitDonePpiDesc);
  71   ASSERT_EFI_ERROR (Status);
  72
  73   return EFI_SUCCESS;
  74 }
  75