1 /* 2 * Copyright (c) 2018-2024, Arm Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <assert.h> 8 9 #include <arch_helpers.h> 10 #include <common/bl_common.h> 11 #include <common/debug.h> 12 #if TRANSFER_LIST 13 #include <transfer_list.h> 14 #endif 15 #include <lib/xlat_tables/xlat_tables_compat.h> 16 #include <plat/common/platform.h> 17 #include <services/arm_arch_svc.h> 18 #include <smccc_helpers.h> 19 #include <tools_share/firmware_encrypted.h> 20 21 /* 22 * The following platform functions are weakly defined. The Platforms 23 * may redefine with strong definition. 24 */ 25 #pragma weak bl2_el3_plat_prepare_exit 26 #pragma weak plat_error_handler 27 #pragma weak bl2_plat_preload_setup 28 #pragma weak bl2_plat_handle_pre_image_load 29 #pragma weak bl2_plat_handle_post_image_load 30 #pragma weak plat_get_enc_key_info 31 #pragma weak plat_is_smccc_feature_available 32 #pragma weak plat_get_soc_version 33 #pragma weak plat_get_soc_revision 34 #pragma weak plat_get_soc_name 35 36 int32_t plat_get_soc_version(void) 37 { 38 return SMC_ARCH_CALL_NOT_SUPPORTED; 39 } 40 41 int32_t plat_get_soc_revision(void) 42 { 43 return SMC_ARCH_CALL_NOT_SUPPORTED; 44 } 45 46 int32_t plat_get_soc_name(char *soc_name __unused) 47 { 48 return SMC_ARCH_CALL_NOT_SUPPORTED; 49 } 50 51 int32_t plat_is_smccc_feature_available(u_register_t fid __unused) 52 { 53 (void)fid; 54 return SMC_ARCH_CALL_NOT_SUPPORTED; 55 } 56 57 void bl2_el3_plat_prepare_exit(void) 58 { 59 } 60 61 void __dead2 plat_error_handler(int err) 62 { 63 (void)err; 64 65 while (true) { 66 wfi(); 67 } 68 } 69 70 void bl2_plat_preload_setup(void) 71 { 72 } 73 74 int bl2_plat_handle_pre_image_load(unsigned int image_id) 75 { 76 (void)image_id; 77 78 return 0; 79 } 80 81 int bl2_plat_handle_post_image_load(unsigned int image_id) 82 { 83 (void)image_id; 84 85 return 0; 86 } 87 88 /* 89 * Weak implementation to provide dummy decryption key only for test purposes, 90 * platforms must override this API for any real world firmware encryption 91 * use-case. 92 */ 93 int plat_get_enc_key_info(enum fw_enc_status_t fw_enc_status, uint8_t *key, 94 size_t *key_len, unsigned int *flags, 95 const uint8_t *img_id, size_t img_id_len) 96 { 97 (void)fw_enc_status; 98 (void)img_id; 99 (void)img_id_len; 100 101 #define DUMMY_FIP_ENC_KEY { 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef, \ 102 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef, \ 103 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef, \ 104 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef } 105 106 const uint8_t dummy_key[] = DUMMY_FIP_ENC_KEY; 107 108 assert(*key_len >= sizeof(dummy_key)); 109 110 *key_len = sizeof(dummy_key); 111 memcpy(key, dummy_key, *key_len); 112 *flags = 0; 113 114 return 0; 115 } 116 117 /* 118 * Set up the page tables for the generic and platform-specific memory regions. 119 * The size of the Trusted SRAM seen by the BL image must be specified as well 120 * as an array specifying the generic memory regions which can be; 121 * - Code section; 122 * - Read-only data section; 123 * - Init code section, if applicable 124 * - Coherent memory region, if applicable. 125 */ 126 127 void __init setup_page_tables(const mmap_region_t *bl_regions, 128 const mmap_region_t *plat_regions) 129 { 130 #if LOG_LEVEL >= LOG_LEVEL_VERBOSE 131 const mmap_region_t *regions = bl_regions; 132 133 while (regions->size != 0U) { 134 VERBOSE("Region: 0x%lx - 0x%lx has attributes 0x%x\n", 135 regions->base_va, 136 regions->base_va + regions->size, 137 regions->attr); 138 regions++; 139 } 140 #endif 141 /* 142 * Map the Trusted SRAM with appropriate memory attributes. 143 * Subsequent mappings will adjust the attributes for specific regions. 144 */ 145 mmap_add(bl_regions); 146 147 /* Now (re-)map the platform-specific memory regions */ 148 mmap_add(plat_regions); 149 150 /* Create the page tables to reflect the above mappings */ 151 init_xlat_tables(); 152 } 153 154 #if ((MEASURED_BOOT || DICE_PROTECTION_ENVIRONMENT) && TRANSFER_LIST) 155 int plat_handoff_mboot(const void *data, uint32_t data_size, void *tl_base) 156 { 157 if (!transfer_list_add(tl_base, TL_TAG_TPM_EVLOG, data_size, data)) 158 return -1; 159 160 return 0; 161 } 162 #endif 163