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 return SMC_ARCH_CALL_NOT_SUPPORTED; 54 } 55 56 void bl2_el3_plat_prepare_exit(void) 57 { 58 } 59 60 void __dead2 plat_error_handler(int err) 61 { 62 while (1) { 63 wfi(); 64 } 65 } 66 67 void bl2_plat_preload_setup(void) 68 { 69 } 70 71 int bl2_plat_handle_pre_image_load(unsigned int image_id) 72 { 73 return 0; 74 } 75 76 int bl2_plat_handle_post_image_load(unsigned int image_id) 77 { 78 return 0; 79 } 80 81 /* 82 * Weak implementation to provide dummy decryption key only for test purposes, 83 * platforms must override this API for any real world firmware encryption 84 * use-case. 85 */ 86 int plat_get_enc_key_info(enum fw_enc_status_t fw_enc_status, uint8_t *key, 87 size_t *key_len, unsigned int *flags, 88 const uint8_t *img_id, size_t img_id_len) 89 { 90 #define DUMMY_FIP_ENC_KEY { 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef, \ 91 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef, \ 92 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef, \ 93 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef } 94 95 const uint8_t dummy_key[] = DUMMY_FIP_ENC_KEY; 96 97 assert(*key_len >= sizeof(dummy_key)); 98 99 *key_len = sizeof(dummy_key); 100 memcpy(key, dummy_key, *key_len); 101 *flags = 0; 102 103 return 0; 104 } 105 106 /* 107 * Set up the page tables for the generic and platform-specific memory regions. 108 * The size of the Trusted SRAM seen by the BL image must be specified as well 109 * as an array specifying the generic memory regions which can be; 110 * - Code section; 111 * - Read-only data section; 112 * - Init code section, if applicable 113 * - Coherent memory region, if applicable. 114 */ 115 116 void __init setup_page_tables(const mmap_region_t *bl_regions, 117 const mmap_region_t *plat_regions) 118 { 119 #if LOG_LEVEL >= LOG_LEVEL_VERBOSE 120 const mmap_region_t *regions = bl_regions; 121 122 while (regions->size != 0U) { 123 VERBOSE("Region: 0x%lx - 0x%lx has attributes 0x%x\n", 124 regions->base_va, 125 regions->base_va + regions->size, 126 regions->attr); 127 regions++; 128 } 129 #endif 130 /* 131 * Map the Trusted SRAM with appropriate memory attributes. 132 * Subsequent mappings will adjust the attributes for specific regions. 133 */ 134 mmap_add(bl_regions); 135 136 /* Now (re-)map the platform-specific memory regions */ 137 mmap_add(plat_regions); 138 139 /* Create the page tables to reflect the above mappings */ 140 init_xlat_tables(); 141 } 142 143 #if ((MEASURED_BOOT || DICE_PROTECTION_ENVIRONMENT) && TRANSFER_LIST) 144 int plat_handoff_mboot(const void *data, uint32_t data_size, void *tl_base) 145 { 146 if (!transfer_list_add(tl_base, TL_TAG_TPM_EVLOG, data_size, data)) 147 return -1; 148 149 return 0; 150 } 151 #endif 152