1 /* 2 * Copyright (c) 2018-2020, 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_try_next_boot_source 28 #pragma weak plat_get_enc_key_info 29 #pragma weak plat_is_smccc_feature_available 30 #pragma weak plat_get_soc_version 31 #pragma weak plat_get_soc_revision 32 33 int32_t plat_get_soc_version(void) 34 { 35 return SMC_ARCH_CALL_NOT_SUPPORTED; 36 } 37 38 int32_t plat_get_soc_revision(void) 39 { 40 return SMC_ARCH_CALL_NOT_SUPPORTED; 41 } 42 43 int32_t plat_is_smccc_feature_available(u_register_t fid __unused) 44 { 45 return SMC_ARCH_CALL_NOT_SUPPORTED; 46 } 47 48 void bl2_el3_plat_prepare_exit(void) 49 { 50 } 51 52 void __dead2 plat_error_handler(int err) 53 { 54 while (1) 55 wfi(); 56 } 57 58 void bl2_plat_preload_setup(void) 59 { 60 } 61 62 int bl2_plat_handle_pre_image_load(unsigned int image_id) 63 { 64 return 0; 65 } 66 67 int bl2_plat_handle_post_image_load(unsigned int image_id) 68 { 69 return 0; 70 } 71 72 int plat_try_next_boot_source(void) 73 { 74 return 0; 75 } 76 77 /* 78 * Weak implementation to provide dummy decryption key only for test purposes, 79 * platforms must override this API for any real world firmware encryption 80 * use-case. 81 */ 82 int plat_get_enc_key_info(enum fw_enc_status_t fw_enc_status, uint8_t *key, 83 size_t *key_len, unsigned int *flags, 84 const uint8_t *img_id, size_t img_id_len) 85 { 86 #define DUMMY_FIP_ENC_KEY { 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef, \ 87 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef, \ 88 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef, \ 89 0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef } 90 91 const uint8_t dummy_key[] = DUMMY_FIP_ENC_KEY; 92 93 assert(*key_len >= sizeof(dummy_key)); 94 95 *key_len = sizeof(dummy_key); 96 memcpy(key, dummy_key, *key_len); 97 *flags = 0; 98 99 return 0; 100 } 101 102 /* 103 * Set up the page tables for the generic and platform-specific memory regions. 104 * The size of the Trusted SRAM seen by the BL image must be specified as well 105 * as an array specifying the generic memory regions which can be; 106 * - Code section; 107 * - Read-only data section; 108 * - Init code section, if applicable 109 * - Coherent memory region, if applicable. 110 */ 111 112 void __init setup_page_tables(const mmap_region_t *bl_regions, 113 const mmap_region_t *plat_regions) 114 { 115 #if LOG_LEVEL >= LOG_LEVEL_VERBOSE 116 const mmap_region_t *regions = bl_regions; 117 118 while (regions->size != 0U) { 119 VERBOSE("Region: 0x%lx - 0x%lx has attributes 0x%x\n", 120 regions->base_va, 121 regions->base_va + regions->size, 122 regions->attr); 123 regions++; 124 } 125 #endif 126 /* 127 * Map the Trusted SRAM with appropriate memory attributes. 128 * Subsequent mappings will adjust the attributes for specific regions. 129 */ 130 mmap_add(bl_regions); 131 132 /* Now (re-)map the platform-specific memory regions */ 133 mmap_add(plat_regions); 134 135 /* Create the page tables to reflect the above mappings */ 136 init_xlat_tables(); 137 } 138