1 /* 2 * Copyright (c) 2015-2021, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <assert.h> 8 #include <errno.h> 9 10 #include <platform_def.h> 11 12 #include <bl1/tbbr/tbbr_img_desc.h> 13 #include <common/bl_common.h> 14 #include <common/debug.h> 15 #include <lib/utils.h> 16 #include <plat/arm/common/plat_arm.h> 17 #include <plat/common/platform.h> 18 19 #pragma weak bl1_plat_get_image_desc 20 21 /* Struct to keep track of usable memory */ 22 typedef struct bl1_mem_info { 23 uintptr_t mem_base; 24 unsigned int mem_size; 25 } bl1_mem_info_t; 26 27 static bl1_mem_info_t fwu_addr_map_secure[] = { 28 { 29 .mem_base = ARM_SHARED_RAM_BASE, 30 .mem_size = ARM_SHARED_RAM_SIZE 31 }, 32 { 33 .mem_size = 0 34 } 35 }; 36 37 static bl1_mem_info_t fwu_addr_map_non_secure[] = { 38 { 39 .mem_base = ARM_NS_DRAM1_BASE, 40 .mem_size = ARM_NS_DRAM1_SIZE 41 }, 42 { 43 .mem_base = PLAT_ARM_NVM_BASE, 44 .mem_size = PLAT_ARM_NVM_SIZE 45 }, 46 { 47 .mem_size = 0 48 } 49 }; 50 51 int bl1_plat_mem_check(uintptr_t mem_base, 52 unsigned int mem_size, 53 unsigned int flags) 54 { 55 unsigned int index = 0; 56 bl1_mem_info_t *mmap; 57 58 assert(mem_base); 59 assert(mem_size); 60 /* 61 * The caller of this function is responsible for checking upfront that 62 * the end address doesn't overflow. We double-check this in debug 63 * builds. 64 */ 65 assert(!check_uptr_overflow(mem_base, mem_size - 1)); 66 67 /* 68 * Check the given image source and size. 69 */ 70 if (GET_SECURITY_STATE(flags) == SECURE) 71 mmap = fwu_addr_map_secure; 72 else 73 mmap = fwu_addr_map_non_secure; 74 75 while (mmap[index].mem_size) { 76 if ((mem_base >= mmap[index].mem_base) && 77 ((mem_base + mem_size) 78 <= (mmap[index].mem_base + 79 mmap[index].mem_size))) 80 return 0; 81 82 index++; 83 } 84 85 return -ENOMEM; 86 } 87 88 /******************************************************************************* 89 * This function does linear search for image_id and returns image_desc. 90 ******************************************************************************/ 91 image_desc_t *bl1_plat_get_image_desc(unsigned int image_id) 92 { 93 unsigned int index = 0; 94 95 while (bl1_tbbr_image_descs[index].image_id != INVALID_IMAGE_ID) { 96 if (bl1_tbbr_image_descs[index].image_id == image_id) 97 return &bl1_tbbr_image_descs[index]; 98 index++; 99 } 100 101 return NULL; 102 } 103