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