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https://github.com/tianocore/edk2
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f7052e2d02
Updated Tpm2DeviceLibFfa to no longer use globals. Updated the SEC version of Tpm2DeviceLibFfaBase to no longer use globals when including TPM libraries in the SEC phase. Includes various cleanup regarding the updated files. Signed-off-by: Raymond Diaz <raymonddiaz@microsoft.com>
61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
/** @file
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This library provides an implementation of Tpm2DeviceLib
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using ARM64 SMC calls to request TPM service.
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The implementation is only supporting the Command Response Buffer (CRB)
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for sharing data with the TPM.
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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/BaseLib.h>
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#include <Library/Tpm2DeviceLib.h>
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#include "Tpm2DeviceLibFfa.h"
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UINT8 mCRBIdleByPass;
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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 mCRBIdleByPass;
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}
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/**
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Check that we have an address for the CRB
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@retval EFI_SUCCESS The entry point is executed successfully.
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@retval EFI_NO_MAPPING The TPM base address is not set up.
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@retval EFI_UNSUPPORTED The TPM interface type is not supported.
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**/
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EFI_STATUS
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EFIAPI
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InternalTpm2DeviceLibFfaConstructor (
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VOID
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)
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{
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EFI_STATUS Status;
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mCRBIdleByPass = 0xFF;
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if (PcdGet64 (PcdTpmBaseAddress) == 0) {
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return EFI_NO_MAPPING;
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}
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Status = ValidateTpmInterfaceType ();
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if (EFI_ERROR (Status)) {
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return Status;
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}
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mCRBIdleByPass = Tpm2GetIdleByPass ((VOID *)(UINTN)PcdGet64 (PcdTpmBaseAddress));
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return EFI_SUCCESS;
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}
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