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/* 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.
*
* Functions for querying, manipulating and locking rollback indices
* stored in the TPM NVRAM.
*/
#ifndef VBOOT_REFERENCE_ROLLBACK_INDEX_H_
#define VBOOT_REFERENCE_ROLLBACK_INDEX_H_
#include <stdint.h>
extern uint16_t g_firmware_key_version;
extern uint16_t g_firmware_version;
extern uint16_t g_kernel_key_version;
extern uint16_t g_kernel_version;
/* Rollback version types. */
#define FIRMWARE_KEY_VERSION 0
#define FIRMWARE_VERSION 1
#define KERNEL_KEY_VERSION 2
#define KERNEL_VERSION 3
/* TPM NVRAM location indices. */
#define FIRMWARE_KEY_VERSION_NV_INDEX 0x1001
#define FIRMWARE_VERSION_NV_INDEX 0x1002
#define KERNEL_KEY_VERSION_NV_INDEX 0x1003
#define KERNEL_VERSION_NV_INDEX 0x1004
void SetupTPM(void);
uint16_t GetStoredVersion(int type);
int WriteStoredVersion(int type, uint16_t version);
void LockStoredVersion(int type);
#endif /* VBOOT_REFERENCE_ROLLBACK_INDEX_H_ */
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