include/tee/optee_ta_avb.h

/* SPDX-License-Identifier: BSD-2-Clause */
/* Copyright (c) 2018, Linaro Limited */

#ifndef __TA_AVB_H
#define __TA_AVB_H

#define TA_AVB_UUID { 0x023f8f1a, 0x292a, 0x432b, \
		      { 0x8f, 0xc4, 0xde, 0x84, 0x71, 0x35, 0x80, 0x67 } }

#define TA_AVB_MAX_ROLLBACK_LOCATIONS	256

/*
 * Gets the rollback index corresponding to the given rollback index slot.
 *
 * in	params[0].value.a:	rollback index slot
 * out	params[1].value.a:	upper 32 bits of rollback index
 * out	params[1].value.b:	lower 32 bits of rollback index
 */
#define TA_AVB_CMD_READ_ROLLBACK_INDEX	0

/*
 * Updates the rollback index corresponding to the given rollback index slot.
 *
 * Will refuse to update a slot with a lower value.
 *
 * in	params[0].value.a:	rollback index slot
 * in	params[1].value.a:	upper 32 bits of rollback index
 * in	params[1].value.b:	lower 32 bits of rollback index
 */
#define TA_AVB_CMD_WRITE_ROLLBACK_INDEX	1

/*
 * Gets the lock state of the device.
 *
 * out	params[0].value.a:	lock state
 */
#define TA_AVB_CMD_READ_LOCK_STATE	2

/*
 * Sets the lock state of the device.
 *
 * If the lock state is changed all rollback slots will be reset to 0
 *
 * in	params[0].value.a:	lock state
 */
#define TA_AVB_CMD_WRITE_LOCK_STATE	3

#endif /* __TA_AVB_H */