blob: 655b87763050212edfaee5ddadeab2e3deea456f [file] [log] [blame]
/* 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.
/* FIXME(gauravsh):
* NOTE: This file is copied over from
* src/platform/tpm_lite/src/tlcl/tlcl.h
* Ideally, we want to directly include it without having two maintain
* duplicate copies in sync. But in the current model, this is hard
* to do without breaking standalone compilation.
* Eventually tpm_lite should be moved into vboot_reference.
#ifndef TPM_LITE_TLCL_H_
#define TPM_LITE_TLCL_H_
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
/* Call this first.
void TlclLibinit(void);
/* Sends a TPM_Startup(ST_CLEAR). Note that this is a no-op for the emulator,
* because it runs this command during initialization.
void TlclStartup(void);
/* Run the self test. Note---this is synchronous. To run this in parallel
* with other firmware, use ContinueSelfTest.
void TlclSelftestfull(void);
/* Defines a space with permission [perm]. [index] is the index for the space,
* [size] the usable data size. Errors are ignored.
void TlclDefineSpace(uint32_t index, uint32_t perm, uint32_t size);
/* Writes [length] bytes of [data] to space at [index]. The TPM error code is
* returned (0 for success).
uint32_t TlclWrite(uint32_t index, uint8_t *data, uint32_t length);
/* Reads [length] bytes from space at [index] into [data]. The TPM error code
* is returned (0 for success).
uint32_t TlclRead(uint32_t index, uint8_t *data, uint32_t length);
/* Write-locks space at [index].
void TlclWriteLock(uint32_t index);
/* Read-locks space at [index].
void TlclReadLock(uint32_t index);
/* Asserts physical presence in software.
void TlclAssertPhysicalPresence(void);
/* Turns off physical presence and locks it off until next reboot.
uint32_t TlclLockPhysicalPresence(void);
/* Sets the nvLocked bit.
void TlclSetNvLocked(void);
/* Returns 1 if the TPM is owned, 0 otherwise.
int TlclIsOwned(void);
/* Issues a ForceClear.
void TlclForceClear(void);
/* Issues a SetEnable.
void TlclSetEnable(void);
/* Issues a SetDeactivated. Pass 0 to activate. Returns result code.
int TlclSetDeactivated(uint8_t flag);
/* Gets some permanent flags of interest. (Add more here as needed.)
int TlclGetFlags(uint8_t* disable, uint8_t* deactivated);
/* Sets the bGlobalLock flag, which only a reboot can clear.
uint32_t TlclSetGlobalLock(void);
#endif /* TPM_LITE_TLCL_H_ */