cc71e26372
Remove the use of the IoLib and Mmioxx() calls to detect dTPM. This module calls the Tpm12DeviceLib to detect a TPM and the implementation of the Tpm12DeviceLib for dTPM performs the same Mmioxx() calls to detect a dTPM. This change makes this module more generic and portable by maximizing the use of the Tpm12DeviceLib abstraction for TPM detection. Cc: Chao Zhang <chao.b.zhang@intel.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Michael Kinney <michael.d.kinney@intel.com> Reviewed-by: Chao Zhang <chao.b.zhang@intel.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19724 6f19259b-4bc3-4df7-8a09-765794883524
106 lines
3.3 KiB
C
106 lines
3.3 KiB
C
/** @file
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TPM1.2/dTPM2.0 auto detection.
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Copyright (c) 2013 - 2016, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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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 "TrEEConfigNvData.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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TREE_DEVICE_DETECTION TrEEDeviceDetection;
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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(TREE_DEVICE_DETECTION);
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ZeroMem (&TrEEDeviceDetection, sizeof(TrEEDeviceDetection));
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Status = VariablePpi->GetVariable (
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VariablePpi,
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TREE_DEVICE_DETECTION_NAME,
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&gTrEEConfigFormSetGuid,
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NULL,
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&Size,
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&TrEEDeviceDetection
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);
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if (!EFI_ERROR (Status) &&
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(TrEEDeviceDetection.TpmDeviceDetected >= TPM_DEVICE_MIN) &&
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(TrEEDeviceDetection.TpmDeviceDetected <= TPM_DEVICE_MAX)) {
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DEBUG ((EFI_D_ERROR, "TpmDevice from DeviceDetection: %x\n", TrEEDeviceDetection.TpmDeviceDetected));
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return TrEEDeviceDetection.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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