121 lines
3.7 KiB
C
121 lines
3.7 KiB
C
/** @file
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Acpi Gnvs Init Library.
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@copyright
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INTEL CONFIDENTIAL
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Copyright 2018 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 <Uefi.h>
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#include <Library/IoLib.h>
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#include <Library/PciLib.h>
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#include <Library/DebugLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Protocol/PlatformNvsArea.h>
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#include <Protocol/MpService.h>
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/**
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@brief
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Global NVS initialize.
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@param[in] PlatformNvsAreaPtr - Pointer of global NVS area
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@retval EFI_SUCCESS - Allocate Global NVS completed.
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@retval EFI_OUT_OF_RESOURCES - Failed to allocate required page for GNVS.
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**/
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EFI_STATUS
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EFIAPI
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AcpiGnvsInit (
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IN OUT VOID **PlatformNvsAreaPtr
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)
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{
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UINTN Pages;
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EFI_PHYSICAL_ADDRESS Address;
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EFI_STATUS Status;
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PLATFORM_NVS_AREA_PROTOCOL *GNVS;
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EFI_MP_SERVICES_PROTOCOL *MpService;
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UINTN NumberOfCPUs;
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UINTN NumberOfEnabledCPUs;
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Pages = EFI_SIZE_TO_PAGES (sizeof (PLATFORM_NVS_AREA));
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Address = 0xffffffff; // allocate address below 4G.
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Status = gBS->AllocatePages (
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AllocateMaxAddress,
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EfiACPIMemoryNVS,
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Pages,
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&Address
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);
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ASSERT_EFI_ERROR (Status);
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if (EFI_ERROR(Status)) {
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return Status;
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}
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//
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// Locate the MP services protocol
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// Find the MP Protocol. This is an MP platform, so MP protocol must be there.
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//
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Status = gBS->LocateProtocol (
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&gEfiMpServiceProtocolGuid,
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NULL,
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(VOID **) &MpService
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);
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ASSERT_EFI_ERROR (Status);
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//
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// Determine the number of processors
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//
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MpService->GetNumberOfProcessors (
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MpService,
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&NumberOfCPUs,
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&NumberOfEnabledCPUs
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);
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*PlatformNvsAreaPtr = (VOID *) (UINTN) Address;
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SetMem (*PlatformNvsAreaPtr, sizeof (PLATFORM_NVS_AREA), 0);
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//
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// GNVS default value init here...
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//
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GNVS = (PLATFORM_NVS_AREA_PROTOCOL *) &Address;
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GNVS->Area->ThreadCount = (UINT8)NumberOfEnabledCPUs;
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//
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// Miscellaneous
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//
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GNVS->Area->PL1LimitCS = 0;
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GNVS->Area->PL1LimitCSValue = 4500;
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return EFI_SUCCESS;
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}
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