• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /*
2  * Copyright (c) 2016-2019, 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 
13 #include <plat/common/platform.h>
14 #include <platform_def.h>
15 #include <tools_share/tbbr_oid.h>
16 
17 /*
18  * Store a new non-volatile counter value.
19  *
20  * On some FVP versions, the non-volatile counters are read-only so this
21  * function will always fail.
22  *
23  * Return: 0 = success, Otherwise = error
24  */
plat_set_nv_ctr(void * cookie,unsigned int nv_ctr)25 int plat_set_nv_ctr(void *cookie, unsigned int nv_ctr)
26 {
27 	const char *oid;
28 	uintptr_t nv_ctr_addr;
29 
30 	assert(cookie != NULL);
31 
32 	oid = (const char *)cookie;
33 	if (strcmp(oid, TRUSTED_FW_NVCOUNTER_OID) == 0) {
34 		nv_ctr_addr = TFW_NVCTR_BASE;
35 	} else if (strcmp(oid, NON_TRUSTED_FW_NVCOUNTER_OID) == 0) {
36 		nv_ctr_addr = NTFW_CTR_BASE;
37 	} else {
38 		return 1;
39 	}
40 
41 	mmio_write_32(nv_ctr_addr, nv_ctr);
42 
43 	/*
44 	 * If the FVP models a locked counter then its value cannot be updated
45 	 * and the above write operation has been silently ignored.
46 	 */
47 	return (mmio_read_32(nv_ctr_addr) == nv_ctr) ? 0 : 1;
48 }
49