1 /* 2 * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <assert.h> 32 #include <platform_oid.h> 33 #include <stdint.h> 34 #include <string.h> 35 #include "fvp_def.h" 36 37 /* 38 * Store a new non-volatile counter value. On some FVP versions, the 39 * non-volatile counters are RO. On these versions we expect the values in the 40 * certificates to always match the RO values so that this function is never 41 * called. 42 * 43 * Return: 0 = success, Otherwise = error 44 */ 45 int plat_set_nv_ctr(void *cookie, unsigned int nv_ctr) 46 { 47 const char *oid; 48 uint32_t *nv_ctr_addr; 49 50 assert(cookie != NULL); 51 52 oid = (const char *)cookie; 53 if (strcmp(oid, TRUSTED_FW_NVCOUNTER_OID) == 0) { 54 nv_ctr_addr = (uint32_t *)TFW_NVCTR_BASE; 55 } else if (strcmp(oid, NON_TRUSTED_FW_NVCOUNTER_OID) == 0) { 56 nv_ctr_addr = (uint32_t *)NTFW_CTR_BASE; 57 } else { 58 return 1; 59 } 60 61 *(unsigned int *)nv_ctr_addr = nv_ctr; 62 63 /* Verify that the current value is the one we just wrote. */ 64 if (nv_ctr != (unsigned int)(*nv_ctr_addr)) 65 return 1; 66 67 return 0; 68 } 69