1 /* 2 * Copyright (c) 2023-2024, Arm Limited. All rights reserved. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 /** 18 * \file tram_drv.c 19 * \brief Driver for Arm TRAM. 20 */ 21 22 #include "tram_drv.h" 23 24 #include "tfm_hal_device_header.h" 25 26 #ifdef TRAM_CONFIG_EXTERNAL_DPA_HARDENED_WORD_COPY 27 #include "dpa_hardened_word_copy.h" 28 #endif /* TRAM_CONFIG_EXTERNAL_DPA_HARDENED_WORD_COPY */ 29 30 struct _tram_reg_map_t { 31 __IM uint32_t trbc; 32 /*!< Offset: 0x000 (R/ ) TRAM Build Configuration Register */ 33 __IOM uint32_t trc; 34 /*!< Offset: 0x004 (R/W) TRAM Configuration Register */ 35 __OM uint32_t trkey[8]; 36 /*!< Offset: 0x008 ( /W) TRAM Key Register */ 37 __IOM uint32_t reserved_0[0x3E9]; 38 /*!< Offset: 0x28-0xFCC Reserved */ 39 __IM uint32_t pidr4; 40 /*!< Offset: 0xFD0 (R/ ) Peripheral ID 4 */ 41 __IOM uint32_t reserved_1[3]; 42 /*!< Offset: 0xFD4-0xFDC Reserved */ 43 __IM uint32_t pidr0; 44 /*!< Offset: 0xFE0 (R/ ) Peripheral ID 0 */ 45 __IM uint32_t pidr1; 46 /*!< Offset: 0xFE4 (R/ ) Peripheral ID 1 */ 47 __IM uint32_t pidr2; 48 /*!< Offset: 0xFE8 (R/ ) Peripheral ID 2 */ 49 __IM uint32_t pidr3; 50 /*!< Offset: 0xFEC (R/ ) Peripheral ID 3 */ 51 __IM uint32_t cidr0; 52 /*!< Offset: 0xFF0 (R/ ) Component ID 0 */ 53 __IM uint32_t cidr1; 54 /*!< Offset: 0xFF4 (R/ ) Component ID 1 */ 55 __IM uint32_t cidr2; 56 /*!< Offset: 0xFF8 (R/ ) Component ID 2 */ 57 __IM uint32_t cidr3; 58 /*!< Offset: 0xFFC (R/ ) Component ID 3 */ 59 }; 60 tram_set_key(struct tram_dev_t * dev,const uint32_t * key)61void tram_set_key(struct tram_dev_t *dev, const uint32_t *key) 62 { 63 struct _tram_reg_map_t* p_tram = (struct _tram_reg_map_t*)dev->cfg->base; 64 uint32_t idx; 65 66 #ifndef TRAM_CONFIG_EXTERNAL_DPA_HARDENED_WORD_COPY 67 for (idx = 0; idx < (sizeof(p_tram->trkey) / sizeof(uint32_t)); idx++) { 68 p_tram->trkey[idx] = key[idx]; 69 } 70 #else 71 (void)idx; 72 dpa_hardened_word_copy(p_tram->trkey, key, (sizeof(p_tram->trkey) / sizeof(uint32_t)); 73 #endif /* TRAM_CONFIG_EXTERNAL_DPA_HARDENED_WORD_COPY */ 74 } 75 76 void tram_wipe_key(struct tram_dev_t *dev) 77 { 78 struct _tram_reg_map_t* p_tram = (struct _tram_reg_map_t*)dev->cfg->base; 79 80 p_tram->trc |= (0b1 << 1); 81 } 82 83 void tram_enable_encryption(struct tram_dev_t *dev) 84 { 85 struct _tram_reg_map_t* p_tram = (struct _tram_reg_map_t*)dev->cfg->base; 86 87 p_tram->trc |= 0b1; 88 } 89 90 void tram_disable_encryption(struct tram_dev_t *dev) 91 { 92 struct _tram_reg_map_t* p_tram = (struct _tram_reg_map_t*)dev->cfg->base; 93 94 p_tram->trc &= ~0b1; 95 } 96
