arm-trusted-firmware/plat/arm/board/morello/morello_trusted_boot.c

/*
 * Copyright (c) 2021, Arm Limited. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <stdint.h>

#include <plat/arm/common/plat_arm.h>

/*
 * Return the non-volatile counter value stored in the platform. The cookie
 * will contain the OID of the counter in the certificate.
 *
 * Return: 0 = success, Otherwise = error
 */
int plat_get_nv_ctr(void *cookie, unsigned int *nv_ctr)
{
	*nv_ctr = MORELLO_FW_NVCTR_VAL;

	return 0;
}

/*
 * Store a new non-volatile counter value. By default on ARM development
 * platforms, the non-volatile counters are RO and cannot be modified. We expect
 * the values in the certificates to always match the RO values so that this
 * function is never called.
 *
 * Return: 0 = success, Otherwise = error
 */
int plat_set_nv_ctr(void *cookie, unsigned int nv_ctr)
{
	return 1;
}

/*
 * Return the ROTPK hash in the following ASN.1 structure in DER format:
 *
 * AlgorithmIdentifier  ::=  SEQUENCE  {
 *     algorithm         OBJECT IDENTIFIER,
 *     parameters        ANY DEFINED BY algorithm OPTIONAL
 * }
 *
 * DigestInfo ::= SEQUENCE {
 *     digestAlgorithm   AlgorithmIdentifier,
 *     digest            OCTET STRING
 * }
 */
int plat_get_rotpk_info(void *cookie, void **key_ptr, unsigned int *key_len,
			unsigned int *flags)
{
	return arm_get_rotpk_info(cookie, key_ptr, key_len, flags);
}