/** @file
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SMM Library instance of SPI Flash Common Library Class
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Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/SmmServicesTableLib.h>
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#include <Protocol/Spi.h>
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#include <Library/DebugLib.h>
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extern PCH_SPI_PROTOCOL *mSpiProtocol;
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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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mBiosAreaBaseAddress = (UINTN)PcdGet32 (PcdBiosAreaBaseAddress);
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mBiosSize = (UINTN)PcdGet32 (PcdBiosSize);
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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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return Status;
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}
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