2 CPU Features PEIM driver to initialize CPU features.
4 Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
5 SPDX-License-Identifier: BSD-2-Clause-Patent
11 #include <Library/BaseLib.h>
12 #include <Library/DebugLib.h>
13 #include <Library/PeiServicesLib.h>
14 #include <Library/RegisterCpuFeaturesLib.h>
15 #include <Library/HobLib.h>
17 #include <Guid/CpuFeaturesInitDone.h>
19 EFI_PEI_PPI_DESCRIPTOR mPeiCpuFeaturesInitDonePpiDesc
= {
20 (EFI_PEI_PPI_DESCRIPTOR_PPI
| EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST
),
21 &gEdkiiCpuFeaturesInitDoneGuid
,
26 CPU Features driver entry point function.
28 It will perform CPU features initialization, except for
29 PcdCpuFeaturesInitOnS3Resume is FALSE on S3 resume.
31 @param FileHandle Handle of the file being invoked.
32 @param PeiServices Describes the list of possible PEI Services.
34 @retval EFI_SUCCESS CPU Features is initialized successfully.
38 CpuFeaturesPeimInitialize (
39 IN EFI_PEI_FILE_HANDLE FileHandle
,
40 IN CONST EFI_PEI_SERVICES
**PeiServices
44 EFI_BOOT_MODE BootMode
;
46 Status
= PeiServicesGetBootMode (&BootMode
);
47 ASSERT_EFI_ERROR (Status
);
49 if (BootMode
== BOOT_ON_S3_RESUME
&&
50 !PcdGetBool (PcdCpuFeaturesInitOnS3Resume
)) {
52 // Does nothing when if PcdCpuFeaturesInitOnS3Resume is FLASE
60 CpuFeaturesInitialize ();
63 // Install CPU Features Init Done PPI
65 Status
= PeiServicesInstallPpi(&mPeiCpuFeaturesInitDonePpiDesc
);
66 ASSERT_EFI_ERROR (Status
);
69 // Build HOB to let CpuFeatureDxe driver skip the initialization process.
71 BuildGuidHob (&gEdkiiCpuFeaturesInitDoneGuid
, 0);