diff options
| author | jyao1 <jyao1> | 2013-09-18 05:31:18 +0000 |
|---|---|---|
| committer | jyao1 <jyao1@6f19259b-4bc3-4df7-8a09-765794883524> | 2013-09-18 05:31:18 +0000 |
| commit | c1d932429ef9700a2da64452546be14e92468b07 (patch) | |
| tree | 5f2c09763c54a953d5525b6b5da48634992c2aa0 /SecurityPkg/Tcg/TrEEConfig/TpmDetection.c | |
| parent | 2e61fb38b6aaa17d22f1bf72332ccd4bc2f780eb (diff) | |
| download | edk2-platforms-c1d932429ef9700a2da64452546be14e92468b07.tar.xz | |
Add TPM2 implementation.
signed off by: jiewen.yao@intel.com
reviewed by: guo.dong@intel.com
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14687 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'SecurityPkg/Tcg/TrEEConfig/TpmDetection.c')
| -rw-r--r-- | SecurityPkg/Tcg/TrEEConfig/TpmDetection.c | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/SecurityPkg/Tcg/TrEEConfig/TpmDetection.c b/SecurityPkg/Tcg/TrEEConfig/TpmDetection.c new file mode 100644 index 0000000000..b8aab1ffd1 --- /dev/null +++ b/SecurityPkg/Tcg/TrEEConfig/TpmDetection.c @@ -0,0 +1,107 @@ +/** @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;
+}
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