mirror of https://github.com/acidanthera/audk.git
108 lines
2.8 KiB
C
108 lines
2.8 KiB
C
/** @file
|
|
TPM1.2/dTPM2.0 auto detection.
|
|
|
|
Copyright (c) 2013, Intel Corporation. All rights reserved.<BR>
|
|
This program and the accompanying materials
|
|
are licensed and made available under the terms and conditions of the BSD License
|
|
which accompanies this distribution. The full text of the license may be found at
|
|
http://opensource.org/licenses/bsd-license.php
|
|
|
|
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
|
|
|
**/
|
|
|
|
|
|
#include <PiPei.h>
|
|
|
|
#include <Library/BaseLib.h>
|
|
#include <Library/BaseMemoryLib.h>
|
|
#include <Library/IoLib.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 "TrEEConfigNvData.h"
|
|
|
|
/**
|
|
This routine return if dTPM (1.2 or 2.0) present.
|
|
|
|
@retval TRUE dTPM present
|
|
@retval FALSE dTPM not present
|
|
**/
|
|
BOOLEAN
|
|
IsDtpmPresent (
|
|
VOID
|
|
)
|
|
{
|
|
UINT8 RegRead;
|
|
|
|
RegRead = MmioRead8 ((UINTN)PcdGet64 (PcdTpmBaseAddress));
|
|
if (RegRead == 0xFF) {
|
|
DEBUG ((EFI_D_ERROR, "DetectTpmDevice: Dtpm not present\n"));
|
|
return FALSE;
|
|
} else {
|
|
DEBUG ((EFI_D_ERROR, "DetectTpmDevice: Dtpm present\n"));
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
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;
|
|
|
|
Status = PeiServicesGetBootMode (&BootMode);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
//
|
|
// In S3, we rely on Setup option, because we save to Setup in normal boot.
|
|
//
|
|
if (BootMode == BOOT_ON_S3_RESUME) {
|
|
DEBUG ((EFI_D_ERROR, "DetectTpmDevice: S3 mode\n"));
|
|
return SetupTpmDevice;
|
|
}
|
|
|
|
if (PcdGetBool (PcdHideTpmSupport) && PcdGetBool (PcdHideTpm)) {
|
|
DEBUG ((EFI_D_ERROR, "DetectTpmDevice: Tpm is hide\n"));
|
|
return TPM_DEVICE_NULL;
|
|
}
|
|
|
|
DEBUG ((EFI_D_ERROR, "DetectTpmDevice:\n"));
|
|
if ((!IsDtpmPresent ()) || (SetupTpmDevice == TPM_DEVICE_NULL)) {
|
|
// dTPM not available
|
|
return TPM_DEVICE_NULL;
|
|
}
|
|
|
|
// 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)) {
|
|
return TPM_DEVICE_2_0_DTPM;
|
|
}
|
|
|
|
Status = Tpm12Startup (TPM_ST_CLEAR);
|
|
if (EFI_ERROR (Status)) {
|
|
return TPM_DEVICE_2_0_DTPM;
|
|
}
|
|
|
|
// NO initialization needed again.
|
|
PcdSet8 (PcdTpmInitializationPolicy, 0);
|
|
return TPM_DEVICE_1_2;
|
|
}
|