1 /*
2 * Copyright (c) 2016-2020, ARM Limited and Contributors. All rights reserved.
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
7 #include <assert.h>
8 #include <stdint.h>
9 #include <string.h>
10
11 #include <lib/mmio.h>
12 #include <lib/fconf/fconf.h>
13 #include <plat/arm/common/plat_arm.h>
14 #include <plat/arm/common/fconf_nv_cntr_getter.h>
15 #include <plat/common/platform.h>
16 #include <platform_def.h>
17 #include <tools_share/tbbr_oid.h>
18
19 /*
20 * Return the ROTPK hash in the following ASN.1 structure in DER format:
21 *
22 * AlgorithmIdentifier ::= SEQUENCE {
23 * algorithm OBJECT IDENTIFIER,
24 * parameters ANY DEFINED BY algorithm OPTIONAL
25 * }
26 *
27 * DigestInfo ::= SEQUENCE {
28 * digestAlgorithm AlgorithmIdentifier,
29 * digest OCTET STRING
30 * }
31 */
plat_get_rotpk_info(void * cookie,void ** key_ptr,unsigned int * key_len,unsigned int * flags)32 int plat_get_rotpk_info(void *cookie, void **key_ptr, unsigned int *key_len,
33 unsigned int *flags)
34 {
35 return arm_get_rotpk_info(cookie, key_ptr, key_len, flags);
36 }
37
38 /*
39 * Store a new non-volatile counter value.
40 *
41 * On some FVP versions, the non-volatile counters are read-only so this
42 * function will always fail.
43 *
44 * Return: 0 = success, Otherwise = error
45 */
plat_set_nv_ctr(void * cookie,unsigned int nv_ctr)46 int plat_set_nv_ctr(void *cookie, unsigned int nv_ctr)
47 {
48 const char *oid;
49 uintptr_t nv_ctr_addr;
50
51 assert(cookie != NULL);
52
53 oid = (const char *)cookie;
54 if (strcmp(oid, TRUSTED_FW_NVCOUNTER_OID) == 0) {
55 nv_ctr_addr = FCONF_GET_PROPERTY(cot, nv_cntr_addr,
56 TRUSTED_NV_CTR_ID);
57 } else if (strcmp(oid, NON_TRUSTED_FW_NVCOUNTER_OID) == 0) {
58 nv_ctr_addr = FCONF_GET_PROPERTY(cot, nv_cntr_addr,
59 NON_TRUSTED_NV_CTR_ID);
60 } else {
61 return 1;
62 }
63
64 mmio_write_32(nv_ctr_addr, nv_ctr);
65
66 /*
67 * If the FVP models a locked counter then its value cannot be updated
68 * and the above write operation has been silently ignored.
69 */
70 return (mmio_read_32(nv_ctr_addr) == nv_ctr) ? 0 : 1;
71 }
72