98 lines
3.4 KiB
C
98 lines
3.4 KiB
C
/** @file
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This file is SampleCode of the library for Intel CPU PEI Debug Pre Memory Policy initialization.
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@copyright
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INTEL CONFIDENTIAL
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Copyright 2014 - 2021 Intel Corporation.
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The source code contained or described herein and all documents related to the
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source code ("Material") are owned by Intel Corporation or its suppliers or
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licensors. Title to the Material remains with Intel Corporation or its suppliers
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and licensors. The Material may contain trade secrets and proprietary and
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confidential information of Intel Corporation and its suppliers and licensors,
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and is protected by worldwide copyright and trade secret laws and treaty
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provisions. No part of the Material may be used, copied, reproduced, modified,
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published, uploaded, posted, transmitted, distributed, or disclosed in any way
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without Intel's prior express written permission.
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No license under any patent, copyright, trade secret or other intellectual
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property right is granted to or conferred upon you by disclosure or delivery
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of the Materials, either expressly, by implication, inducement, estoppel or
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otherwise. Any license under such intellectual property rights must be
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express and approved by Intel in writing.
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Unless otherwise agreed by Intel in writing, you may not remove or alter
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this notice or any other notice embedded in Materials by Intel or
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Intel's suppliers or licensors in any way.
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This file contains a 'Sample Driver' and is licensed as such under the terms
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of your license agreement with Intel or your vendor. This file may be modified
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by the user, subject to the additional terms of the license agreement.
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@par Specification Reference:
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**/
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#include "PeiPolicyDebug.h"
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#include <Library/DebugLib.h>
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#include <Library/ConfigBlockLib.h>
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#include <Library/CpuPlatformLib.h>
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#include <Library/PcdLib.h>
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/**
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This function performs CPU PEI Debug Pre-Memory Policy initialization.
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@retval EFI_SUCCESS The PPI is installed and initialized.
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@retval EFI ERRORS The PPI is not successfully installed.
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**/
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EFI_STATUS
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EFIAPI
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UpdatePeiCpuPolicyDebugPreMem (
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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_PEI_READ_ONLY_VARIABLE2_PPI *VariableServices;
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UINTN VariableSize;
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CPU_SETUP CpuSetup;
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//
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// Make sure ReadOnlyVariablePpi is available
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//
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Status = PeiServicesLocatePpi (
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&gEfiPeiReadOnlyVariable2PpiGuid,
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0,
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NULL,
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(VOID **) &VariableServices
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);
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ASSERT_EFI_ERROR (Status);
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//
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// Get Setup Variable
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//
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VariableSize = sizeof (CPU_SETUP);
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Status = VariableServices->GetVariable (
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VariableServices,
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L"CpuSetup",
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&gCpuSetupVariableGuid,
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NULL,
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&VariableSize,
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&CpuSetup
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);
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ASSERT_EFI_ERROR (Status);
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//
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// If Monitor Mwait Disabled. ApIdleManner should not be MWait Loop.
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// Set ApIdleManner to Halt Loop as workaround.
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//
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if ((CpuSetup.MonitorMwait == 0) && (CpuSetup.ApIdleManner == 2)) {
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CpuSetup.ApIdleManner = 1;
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}
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#if (FixedPcdGet8(PcdFspModeSelection) == 1)
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PcdSet8S (PcdCpuApLoopMode, (UINT8) CpuSetup.ApIdleManner);
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#else
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PcdSetEx8S (&gUefiCpuPkgTokenSpaceGuid, PcdCpuApLoopMode, (UINT8) CpuSetup.ApIdleManner);
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#endif
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return EFI_SUCCESS;
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} |