26fc074a5f
Common definitions are not consumed by VFR. They are not required to be defined in Tcg2ConfigNvData.h with WA way. New shared internal header file is added to include those common definitions. Cc: Jian Wang <jian.j.wang@intel.com> Cc: Chao Zhang <chao.b.zhang@intel.com> Signed-off-by: Liming Gao <liming.gao@intel.com> Reviewed-by: Jian J Wang <jian.j.wang@intel.com> Reviewed-by: Chao Zhang <chao.b.zhang@intel.com>
101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
/** @file
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TPM1.2/dTPM2.0 auto detection.
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Copyright (c) 2015 - 2018, 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 <PiPei.h>
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#include <Ppi/ReadOnlyVariable2.h>
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#include <Library/BaseLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/DebugLib.h>
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#include <Library/PeiServicesLib.h>
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#include <Library/PcdLib.h>
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#include <Library/Tpm12DeviceLib.h>
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#include <Library/Tpm12CommandLib.h>
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#include <IndustryStandard/Tpm12.h>
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#include "Tcg2ConfigNvData.h"
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#include "Tcg2Internal.h"
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/**
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This routine check both SetupVariable and real TPM device, and return final TpmDevice configuration.
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@param SetupTpmDevice TpmDevice configuration in setup driver
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@return TpmDevice configuration
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**/
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UINT8
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DetectTpmDevice (
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IN UINT8 SetupTpmDevice
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)
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{
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EFI_STATUS Status;
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EFI_BOOT_MODE BootMode;
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TCG2_DEVICE_DETECTION Tcg2DeviceDetection;
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EFI_PEI_READ_ONLY_VARIABLE2_PPI *VariablePpi;
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UINTN Size;
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Status = PeiServicesGetBootMode (&BootMode);
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ASSERT_EFI_ERROR (Status);
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//
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// In S3, we rely on normal boot Detection, because we save to ReadOnly Variable in normal boot.
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//
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if (BootMode == BOOT_ON_S3_RESUME) {
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DEBUG ((EFI_D_INFO, "DetectTpmDevice: S3 mode\n"));
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Status = PeiServicesLocatePpi (&gEfiPeiReadOnlyVariable2PpiGuid, 0, NULL, (VOID **) &VariablePpi);
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ASSERT_EFI_ERROR (Status);
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Size = sizeof(TCG2_DEVICE_DETECTION);
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ZeroMem (&Tcg2DeviceDetection, sizeof(Tcg2DeviceDetection));
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Status = VariablePpi->GetVariable (
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VariablePpi,
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TCG2_DEVICE_DETECTION_NAME,
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&gTcg2ConfigFormSetGuid,
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NULL,
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&Size,
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&Tcg2DeviceDetection
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);
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if (!EFI_ERROR (Status) &&
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(Tcg2DeviceDetection.TpmDeviceDetected >= TPM_DEVICE_MIN) &&
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(Tcg2DeviceDetection.TpmDeviceDetected <= TPM_DEVICE_MAX)) {
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DEBUG ((EFI_D_ERROR, "TpmDevice from DeviceDetection: %x\n", Tcg2DeviceDetection.TpmDeviceDetected));
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return Tcg2DeviceDetection.TpmDeviceDetected;
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}
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}
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DEBUG ((EFI_D_INFO, "DetectTpmDevice:\n"));
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// dTPM available and not disabled by setup
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// We need check if it is TPM1.2 or TPM2.0
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// So try TPM1.2 command at first
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Status = Tpm12RequestUseTpm ();
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if (EFI_ERROR (Status)) {
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//
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// dTPM not available
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//
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return TPM_DEVICE_NULL;
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}
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if (BootMode == BOOT_ON_S3_RESUME) {
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Status = Tpm12Startup (TPM_ST_STATE);
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} else {
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Status = Tpm12Startup (TPM_ST_CLEAR);
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}
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if (EFI_ERROR (Status)) {
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return TPM_DEVICE_2_0_DTPM;
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}
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// NO initialization needed again.
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Status = PcdSet8S (PcdTpmInitializationPolicy, 0);
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ASSERT_EFI_ERROR (Status);
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return TPM_DEVICE_1_2;
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}
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