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