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