mirror of https://github.com/acidanthera/audk.git
123 lines
3.1 KiB
C
123 lines
3.1 KiB
C
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/** @file
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CPU Features DXE driver to initialize CPU features.
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Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <PiDxe.h>
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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#include <Library/UefiLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/RegisterCpuFeaturesLib.h>
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#include <Protocol/SmmConfiguration.h>
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#include <Guid/CpuFeaturesInitDone.h>
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/**
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Worker function to perform CPU feature initialization.
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**/
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VOID
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CpuFeaturesInitializeWorker (
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VOID
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)
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{
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EFI_STATUS Status;
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EFI_HANDLE Handle;
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CpuFeaturesDetect ();
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CpuFeaturesInitialize ();
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//
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// Install CPU Features Init Done Protocol
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//
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Handle = NULL;
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Status = gBS->InstallProtocolInterface (
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&Handle,
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&gEdkiiCpuFeaturesInitDoneGuid,
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EFI_NATIVE_INTERFACE,
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NULL
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);
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ASSERT_EFI_ERROR (Status);
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}
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/**
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Event notification that initialize CPU features when gEfiSmmConfigurationProtocol installs.
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@param[in] Event The Event that is being processed, not used.
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@param[in] Context Event Context, not used.
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**/
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VOID
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EFIAPI
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SmmConfigurationEventNotify (
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IN EFI_EVENT Event,
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IN VOID *Context
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)
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{
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EFI_STATUS Status;
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EFI_SMM_CONFIGURATION_PROTOCOL *SmmConfiguration;
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//
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// Make sure this notification is for this handler
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//
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Status = gBS->LocateProtocol (&gEfiSmmConfigurationProtocolGuid, NULL, (VOID **)&SmmConfiguration);
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if (EFI_ERROR (Status)) {
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return;
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}
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CpuFeaturesInitializeWorker ();
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}
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/**
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CPU Features driver entry point function.
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If PcdCpuFeaturesInitAfterSmmRelocation is TRUE, it will register one
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SMM Configuration Protocol notify function to perform CPU features
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initialization. Otherwise, it will perform CPU features initialization
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directly.
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@param ImageHandle Image handle this driver.
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@param SystemTable Pointer to the System Table.
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@retval EFI_SUCCESS CPU Features is initialized successfully.
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**/
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EFI_STATUS
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EFIAPI
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CpuFeaturesDxeInitialize (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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VOID *Registration;
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if (PcdGetBool (PcdCpuFeaturesInitAfterSmmRelocation)) {
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//
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// Install notification callback on SMM Configuration Protocol
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//
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EfiCreateProtocolNotifyEvent (
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&gEfiSmmConfigurationProtocolGuid,
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TPL_CALLBACK,
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SmmConfigurationEventNotify,
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NULL,
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&Registration
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);
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} else {
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CpuFeaturesInitializeWorker ();
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}
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return EFI_SUCCESS;
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}
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