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 35 int32_t plat_get_soc_version(void) 36 { 37 return SMC_ARCH_CALL_NOT_SUPPORTED; 38 } 39 40 int32_t plat_get_soc_revision(void) 41 { 42 return SMC_ARCH_CALL_NOT_SUPPORTED; 43 } 44 45 int32_t plat_is_smccc_feature_available(u_register_t fid __unused) 46 { 47 return SMC_ARCH_CALL_NOT_SUPPORTED; 48 } 49 50 void bl2_el3_plat_prepare_exit(void) 51 { 52 } 53 54 void __dead2 plat_error_handler(int err) 55 { 56 while (1) { 57 wfi(); 58 } 59 } 60 61 void bl2_plat_preload_setup(void) 62 { 63 } 64 65 int bl2_plat_handle_pre_image_load(unsigned int image_id) 66 { 67 return 0; 68 } 69 70 int bl2_plat_handle_post_image_load(unsigned int image_id) 71 { 72 return 0; 73 } 74 75 /* 76 * Weak implementation to provide dummy decryption key only for test purposes, 77 * platforms must override this API for any real world firmware encryption 78 * use-case. 79 */ 80 int plat_get_enc_key_info(enum fw_enc_status_t fw_enc_status, uint8_t *key, 81 size_t *key_len, unsigned int *flags, 82 const uint8_t *img_id, size_t img_id_len) 83 { 84 #define DUMMY_FIP_ENC_KEY { 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef, \ 85 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef, \ 86 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef, \ 87 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef } 88 89 const uint8_t dummy_key[] = DUMMY_FIP_ENC_KEY; 90 91 assert(*key_len >= sizeof(dummy_key)); 92 93 *key_len = sizeof(dummy_key); 94 memcpy(key, dummy_key, *key_len); 95 *flags = 0; 96 97 return 0; 98 } 99 100 /* 101 * Set up the page tables for the generic and platform-specific memory regions. 102 * The size of the Trusted SRAM seen by the BL image must be specified as well 103 * as an array specifying the generic memory regions which can be; 104 * - Code section; 105 * - Read-only data section; 106 * - Init code section, if applicable 107 * - Coherent memory region, if applicable. 108 */ 109 110 void __init setup_page_tables(const mmap_region_t *bl_regions, 111 const mmap_region_t *plat_regions) 112 { 113 #if LOG_LEVEL >= LOG_LEVEL_VERBOSE 114 const mmap_region_t *regions = bl_regions; 115 116 while (regions->size != 0U) { 117 VERBOSE("Region: 0x%lx - 0x%lx has attributes 0x%x\n", 118 regions->base_va, 119 regions->base_va + regions->size, 120 regions->attr); 121 regions++; 122 } 123 #endif 124 /* 125 * Map the Trusted SRAM with appropriate memory attributes. 126 * Subsequent mappings will adjust the attributes for specific regions. 127 */ 128 mmap_add(bl_regions); 129 130 /* Now (re-)map the platform-specific memory regions */ 131 mmap_add(plat_regions); 132 133 /* Create the page tables to reflect the above mappings */ 134 init_xlat_tables(); 135 } 136 137 #if ((MEASURED_BOOT || DICE_PROTECTION_ENVIRONMENT) && TRANSFER_LIST) 138 int plat_handoff_mboot(const void *data, uint32_t data_size, void *tl_base) 139 { 140 if (!transfer_list_add(tl_base, TL_TAG_TPM_EVLOG, data_size, data)) 141 return -1; 142 143 return 0; 144 } 145 #endif 146