mirror of https://github.com/acidanthera/audk.git
69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
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/** @file
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This file abstract internal interfaces of which implementation differs per library instance.
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Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved. <BR>
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Copyright (c) Microsoft Corporation.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/Tpm2DeviceLib.h>
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#include <Library/PcdLib.h>
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#include "Tpm2DeviceLibDTpm.h"
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/**
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Return cached PTP CRB interface IdleByPass state.
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@return Cached PTP CRB interface IdleByPass state.
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**/
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UINT8
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GetCachedIdleByPass (
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VOID
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)
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{
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return PcdGet8 (PcdCRBIdleByPass);
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}
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/**
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Return cached PTP interface type.
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@return Cached PTP interface type.
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**/
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TPM2_PTP_INTERFACE_TYPE
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GetCachedPtpInterface (
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VOID
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)
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{
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return PcdGet8 (PcdActiveTpmInterfaceType);
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}
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/**
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The common function cache current active TpmInterfaceType when needed.
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@retval EFI_SUCCESS DTPM2.0 instance is registered, or system does not support register DTPM2.0 instance
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**/
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EFI_STATUS
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InternalTpm2DeviceLibDTpmCommonConstructor (
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VOID
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)
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{
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TPM2_PTP_INTERFACE_TYPE PtpInterface;
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UINT8 IdleByPass;
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//
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// Cache current active TpmInterfaceType only when needed
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//
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if (PcdGet8 (PcdActiveTpmInterfaceType) == 0xFF) {
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PtpInterface = Tpm2GetPtpInterface ((VOID *)(UINTN)PcdGet64 (PcdTpmBaseAddress));
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PcdSet8S (PcdActiveTpmInterfaceType, PtpInterface);
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}
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if ((PcdGet8 (PcdActiveTpmInterfaceType) == Tpm2PtpInterfaceCrb) && (PcdGet8 (PcdCRBIdleByPass) == 0xFF)) {
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IdleByPass = Tpm2GetIdleByPass ((VOID *)(UINTN)PcdGet64 (PcdTpmBaseAddress));
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PcdSet8S (PcdCRBIdleByPass, IdleByPass);
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}
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return EFI_SUCCESS;
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}
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