1 /* 2 * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <arch_helpers.h> 8 #include <assert.h> 9 #include <bl_common.h> 10 #include <debug.h> 11 #include <errno.h> 12 #if TRUSTED_BOARD_BOOT 13 #include <mbedtls_config.h> 14 #endif 15 #include <platform.h> 16 #include <xlat_tables_compat.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_mbedtls_heap 29 30 void bl2_el3_plat_prepare_exit(void) 31 { 32 } 33 34 void __dead2 plat_error_handler(int err) 35 { 36 while (1) 37 wfi(); 38 } 39 40 void bl2_plat_preload_setup(void) 41 { 42 } 43 44 int bl2_plat_handle_pre_image_load(unsigned int image_id) 45 { 46 return 0; 47 } 48 49 int bl2_plat_handle_post_image_load(unsigned int image_id) 50 { 51 return 0; 52 } 53 54 int plat_try_next_boot_source(void) 55 { 56 return 0; 57 } 58 59 #if TRUSTED_BOARD_BOOT 60 /* 61 * The following default implementation of the function simply returns the 62 * by-default allocated heap. 63 */ 64 int plat_get_mbedtls_heap(void **heap_addr, size_t *heap_size) 65 { 66 static unsigned char heap[TF_MBEDTLS_HEAP_SIZE]; 67 68 assert(heap_addr != NULL); 69 assert(heap_size != NULL); 70 71 *heap_addr = heap; 72 *heap_size = sizeof(heap); 73 return 0; 74 } 75 #endif /* TRUSTED_BOARD_BOOT */ 76 77 /* 78 * Set up the page tables for the generic and platform-specific memory regions. 79 * The size of the Trusted SRAM seen by the BL image must be specified as well 80 * as an array specifying the generic memory regions which can be; 81 * - Code section; 82 * - Read-only data section; 83 * - Init code section, if applicable 84 * - Coherent memory region, if applicable. 85 */ 86 87 void __init setup_page_tables(const mmap_region_t *bl_regions, 88 const mmap_region_t *plat_regions) 89 { 90 #if LOG_LEVEL >= LOG_LEVEL_VERBOSE 91 const mmap_region_t *regions = bl_regions; 92 93 while (regions->size != 0U) { 94 VERBOSE("Region: 0x%lx - 0x%lx has attributes 0x%x\n", 95 regions->base_va, 96 regions->base_va + regions->size, 97 regions->attr); 98 regions++; 99 } 100 #endif 101 /* 102 * Map the Trusted SRAM with appropriate memory attributes. 103 * Subsequent mappings will adjust the attributes for specific regions. 104 */ 105 mmap_add(bl_regions); 106 107 /* Now (re-)map the platform-specific memory regions */ 108 mmap_add(plat_regions); 109 110 /* Create the page tables to reflect the above mappings */ 111 init_xlat_tables(); 112 } 113