mirror of https://github.com/acidanthera/audk.git
101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
/** @file
|
|
TPM1.2/dTPM2.0 auto detection.
|
|
|
|
Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
|
|
#include <PiPei.h>
|
|
#include <Ppi/ReadOnlyVariable2.h>
|
|
|
|
#include <Library/BaseLib.h>
|
|
#include <Library/BaseMemoryLib.h>
|
|
#include <Library/DebugLib.h>
|
|
#include <Library/PeiServicesLib.h>
|
|
#include <Library/PcdLib.h>
|
|
#include <Library/Tpm12DeviceLib.h>
|
|
#include <Library/Tpm12CommandLib.h>
|
|
#include <IndustryStandard/Tpm12.h>
|
|
|
|
#include "Tcg2ConfigNvData.h"
|
|
#include "Tcg2Internal.h"
|
|
|
|
/**
|
|
This routine check both SetupVariable and real TPM device, and return final TpmDevice configuration.
|
|
|
|
@param SetupTpmDevice TpmDevice configuration in setup driver
|
|
|
|
@return TpmDevice configuration
|
|
**/
|
|
UINT8
|
|
DetectTpmDevice (
|
|
IN UINT8 SetupTpmDevice
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
EFI_BOOT_MODE BootMode;
|
|
TCG2_DEVICE_DETECTION Tcg2DeviceDetection;
|
|
EFI_PEI_READ_ONLY_VARIABLE2_PPI *VariablePpi;
|
|
UINTN Size;
|
|
|
|
Status = PeiServicesGetBootMode (&BootMode);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
//
|
|
// In S3, we rely on normal boot Detection, because we save to ReadOnly Variable in normal boot.
|
|
//
|
|
if (BootMode == BOOT_ON_S3_RESUME) {
|
|
DEBUG ((EFI_D_INFO, "DetectTpmDevice: S3 mode\n"));
|
|
|
|
Status = PeiServicesLocatePpi (&gEfiPeiReadOnlyVariable2PpiGuid, 0, NULL, (VOID **) &VariablePpi);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
Size = sizeof(TCG2_DEVICE_DETECTION);
|
|
ZeroMem (&Tcg2DeviceDetection, sizeof(Tcg2DeviceDetection));
|
|
Status = VariablePpi->GetVariable (
|
|
VariablePpi,
|
|
TCG2_DEVICE_DETECTION_NAME,
|
|
&gTcg2ConfigFormSetGuid,
|
|
NULL,
|
|
&Size,
|
|
&Tcg2DeviceDetection
|
|
);
|
|
if (!EFI_ERROR (Status) &&
|
|
(Tcg2DeviceDetection.TpmDeviceDetected >= TPM_DEVICE_MIN) &&
|
|
(Tcg2DeviceDetection.TpmDeviceDetected <= TPM_DEVICE_MAX)) {
|
|
DEBUG ((EFI_D_ERROR, "TpmDevice from DeviceDetection: %x\n", Tcg2DeviceDetection.TpmDeviceDetected));
|
|
return Tcg2DeviceDetection.TpmDeviceDetected;
|
|
}
|
|
}
|
|
|
|
DEBUG ((EFI_D_INFO, "DetectTpmDevice:\n"));
|
|
|
|
// dTPM available and not disabled by setup
|
|
// We need check if it is TPM1.2 or TPM2.0
|
|
// So try TPM1.2 command at first
|
|
|
|
Status = Tpm12RequestUseTpm ();
|
|
if (EFI_ERROR (Status)) {
|
|
//
|
|
// dTPM not available
|
|
//
|
|
return TPM_DEVICE_NULL;
|
|
}
|
|
|
|
if (BootMode == BOOT_ON_S3_RESUME) {
|
|
Status = Tpm12Startup (TPM_ST_STATE);
|
|
} else {
|
|
Status = Tpm12Startup (TPM_ST_CLEAR);
|
|
}
|
|
if (EFI_ERROR (Status)) {
|
|
return TPM_DEVICE_2_0_DTPM;
|
|
}
|
|
|
|
// NO initialization needed again.
|
|
Status = PcdSet8S (PcdTpmInitializationPolicy, 0);
|
|
ASSERT_EFI_ERROR (Status);
|
|
return TPM_DEVICE_1_2;
|
|
}
|