Exhaustive test for rollback code

firmware/include/tlcl.h

 /* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /* TPM Lightweight Command Library.
  *
  * A low-level library for interfacing to TPM hardware or an emulator.
  */
 
@@ skipping 12 matching lines @@
 
 #ifndef TPM_LITE_TLCL_H_
 #define TPM_LITE_TLCL_H_
 
 #include "sysincludes.h"
 
 /* Call this first.
  */
 void TlclLibInit(void);
 
+/* Close and open the device.  This is needed for running more complex commands
+ * at user level, such as TPM_TakeOwnership, since the TPM device can be opened
+ * only by one process at a time.
+ */
+void TlclCloseDevice(void);
+void TlclOpenDevice(void);
+
 /* Sends a TPM_Startup(ST_CLEAR).  Note that this is a no-op for the emulator,
  * because it runs this command during initialization.  The TPM error code is
  * returned (0 for success).
  */
 uint32_t TlclStartup(void);
 
 /* Run the self test.  Note---this is synchronous.  To run this in parallel
  * with other firmware, use ContinueSelfTest.  The TPM error code is returned.
  */
 uint32_t TlclSelftestfull(void);
@@ skipping 39 matching lines @@
 uint32_t TlclSetNvLocked(void);
 
 /* Returns 1 if the TPM is owned, 0 otherwise.
  */
 int TlclIsOwned(void);
 
 /* Issues a ForceClear.  The TPM error code is returned.
  */
 uint32_t TlclForceClear(void);
 
-/* Issues a SetEnable.  The TPM error code is returned.
+/* Issues a PhysicalEnable.  The TPM error code is returned.
  */
 uint32_t TlclSetEnable(void);
 
+/* Issues a PhysicalDisable.  The TPM error code is returned.
+ */
+uint32_t TlclClearEnable(void);
+
 /* Issues a SetDeactivated.  Pass 0 to activate.  Returns result code.
  */
 uint32_t TlclSetDeactivated(uint8_t flag);
 
 /* Gets flags of interest.  (Add more here as needed.)  The TPM error code is
  * returned.
  */
 uint32_t TlclGetFlags(uint8_t* disable, uint8_t* deactivated);
 
 /* Sets the bGlobalLock flag, which only a reboot can clear.  The TPM error
  * code is returned.
  */
 uint32_t TlclSetGlobalLock(void);
 
 /* Gets the permission bits for the NVRAM space with |index|.
  */
 uint32_t TlclGetPermissions(uint32_t index, uint32_t* permissions);
 
 #endif  /* TPM_LITE_TLCL_H_ */