105 lines
3.6 KiB
C
105 lines
3.6 KiB
C
/** @file
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SMM Library instance of SPI Flash Common Library Class
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@copyright
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INTEL CONFIDENTIAL
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Copyright 2011 - 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 <Library/SpiFlashCommon.h>
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#include <Library/SmmServicesTableLib.h>
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#include <Protocol/BiosGuard.h>
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extern PCH_SPI_PROTOCOL *mSpiProtocol;
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extern BIOSGUARD_PROTOCOL *mBiosGuardProtocol;
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extern UINTN mBiosAreaBaseAddress;
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extern UINTN mBiosSize;
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extern UINTN mBiosOffset;
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/**
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The library constructuor.
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The function does the necessary initialization work for this library
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instance.
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@param[in] ImageHandle The firmware allocated handle for the UEFI image.
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@param[in] SystemTable A pointer to the EFI system table.
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@retval EFI_SUCCESS The function always return EFI_SUCCESS for now.
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It will ASSERT on error for debug version.
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@retval EFI_ERROR Please reference LocateProtocol for error code details.
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**/
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EFI_STATUS
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EFIAPI
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SmmSpiFlashCommonLibConstructor (
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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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EFI_STATUS Status;
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UINT32 BaseAddr;
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UINT32 RegionSize;
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#if FixedPcdGetBool(PcdExtendedBiosRegionSupport) == 0
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mBiosAreaBaseAddress = (UINTN)PcdGet32 (PcdBiosAreaBaseAddress);
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mBiosSize = (UINTN)PcdGet32 (PcdBiosSize);
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#else
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mBiosAreaBaseAddress = (UINTN) PcdGet32 (PcdBiosAreaBaseAddress) + (UINTN) PcdGet32 (PcdFlashExtendRegionOffset);
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mBiosSize = 0x1000000 + (UINTN) PcdGet32 (PcdFlashExtendRegionSizeInUse);
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#endif
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//
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// Locate the SMM SPI protocol.
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//
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Status = gSmst->SmmLocateProtocol (
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&gPchSmmSpiProtocolGuid,
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NULL,
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(VOID **) &mSpiProtocol
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);
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ASSERT_EFI_ERROR (Status);
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mSpiProtocol->GetRegionAddress (mSpiProtocol, FlashRegionBios, &BaseAddr, &RegionSize);
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mBiosOffset = BaseAddr;
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#if FixedPcdGetBool(PcdBiosGuardEnable) == 1
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//
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// Locate the BiosGuard protocol.
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//
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Status = gSmst->SmmLocateProtocol (
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&gSmmBiosGuardProtocolGuid,
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NULL,
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(VOID **)&mBiosGuardProtocol
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);
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ASSERT_EFI_ERROR (Status);
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#endif
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return Status;
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}
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