laurenw-arm | 7c7b198 | 2020-10-21 13:34:40 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2021, 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/fconf/fconf.h> |
| 12 | #include <lib/mmio.h> |
| 13 | #include <tools_share/tbbr_oid.h> |
| 14 | |
| 15 | #include <plat/arm/common/fconf_nv_cntr_getter.h> |
| 16 | #include <plat/arm/common/plat_arm.h> |
| 17 | #include <plat/common/platform.h> |
| 18 | #include <platform_def.h> |
| 19 | |
| 20 | |
| 21 | /* |
| 22 | * Return the ROTPK hash in the following ASN.1 structure in DER format: |
| 23 | * |
| 24 | * AlgorithmIdentifier ::= SEQUENCE { |
Gary Morrison | 3d7f654 | 2021-01-27 13:08:47 -0600 | [diff] [blame] | 25 | * algorithm OBJECT IDENTIFIER, |
| 26 | * parameters ANY DEFINED BY algorithm OPTIONAL |
laurenw-arm | 7c7b198 | 2020-10-21 13:34:40 -0500 | [diff] [blame] | 27 | * } |
| 28 | * |
| 29 | * DigestInfo ::= SEQUENCE { |
Gary Morrison | 3d7f654 | 2021-01-27 13:08:47 -0600 | [diff] [blame] | 30 | * digestAlgorithm AlgorithmIdentifier, |
| 31 | * digest OCTET STRING |
laurenw-arm | 7c7b198 | 2020-10-21 13:34:40 -0500 | [diff] [blame] | 32 | * } |
| 33 | */ |
| 34 | int plat_get_rotpk_info(void *cookie, void **key_ptr, unsigned int *key_len, |
| 35 | unsigned int *flags) |
| 36 | { |
| 37 | return arm_get_rotpk_info(cookie, key_ptr, key_len, flags); |
| 38 | } |
| 39 | |
| 40 | /* |
| 41 | * Store a new non-volatile counter value. |
| 42 | * |
| 43 | * On some FVP_R versions, the non-volatile counters are read-only so this |
| 44 | * function will always fail. |
| 45 | * |
| 46 | * Return: 0 = success, Otherwise = error |
| 47 | */ |
| 48 | int plat_set_nv_ctr(void *cookie, unsigned int nv_ctr) |
| 49 | { |
| 50 | const char *oid; |
| 51 | uintptr_t nv_ctr_addr; |
| 52 | |
| 53 | assert(cookie != NULL); |
| 54 | |
| 55 | oid = (const char *)cookie; |
| 56 | if (strcmp(oid, TRUSTED_FW_NVCOUNTER_OID) == 0) { |
| 57 | nv_ctr_addr = FCONF_GET_PROPERTY(cot, nv_cntr_addr, |
| 58 | TRUSTED_NV_CTR_ID); |
| 59 | } else if (strcmp(oid, NON_TRUSTED_FW_NVCOUNTER_OID) == 0) { |
| 60 | nv_ctr_addr = FCONF_GET_PROPERTY(cot, nv_cntr_addr, |
| 61 | NON_TRUSTED_NV_CTR_ID); |
| 62 | } else { |
| 63 | return 1; |
| 64 | } |
| 65 | |
| 66 | mmio_write_32(nv_ctr_addr, nv_ctr); |
| 67 | |
| 68 | /* |
| 69 | * If the FVP_R models a locked counter then its value cannot be updated |
| 70 | * and the above write operation has been silently ignored. |
| 71 | */ |
| 72 | return (mmio_read_32(nv_ctr_addr) == nv_ctr) ? 0 : 1; |
| 73 | } |