1 /* 2 * Copyright (c) 2015-2018, 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 /* Struct to keep track of usable memory */ 20 typedef struct bl1_mem_info { 21 uintptr_t mem_base; 22 unsigned int mem_size; 23 } bl1_mem_info_t; 24 25 static bl1_mem_info_t fwu_addr_map_secure[] = { 26 { 27 .mem_base = ARM_SHARED_RAM_BASE, 28 .mem_size = ARM_SHARED_RAM_SIZE 29 }, 30 { 31 .mem_size = 0 32 } 33 }; 34 35 static bl1_mem_info_t fwu_addr_map_non_secure[] = { 36 { 37 .mem_base = ARM_NS_DRAM1_BASE, 38 .mem_size = ARM_NS_DRAM1_SIZE 39 }, 40 { 41 .mem_base = PLAT_ARM_NVM_BASE, 42 .mem_size = PLAT_ARM_NVM_SIZE 43 }, 44 { 45 .mem_size = 0 46 } 47 }; 48 49 int bl1_plat_mem_check(uintptr_t mem_base, 50 unsigned int mem_size, 51 unsigned int flags) 52 { 53 unsigned int index = 0; 54 bl1_mem_info_t *mmap; 55 56 assert(mem_base); 57 assert(mem_size); 58 /* 59 * The caller of this function is responsible for checking upfront that 60 * the end address doesn't overflow. We double-check this in debug 61 * builds. 62 */ 63 assert(!check_uptr_overflow(mem_base, mem_size - 1)); 64 65 /* 66 * Check the given image source and size. 67 */ 68 if (GET_SECURITY_STATE(flags) == SECURE) 69 mmap = fwu_addr_map_secure; 70 else 71 mmap = fwu_addr_map_non_secure; 72 73 while (mmap[index].mem_size) { 74 if ((mem_base >= mmap[index].mem_base) && 75 ((mem_base + mem_size) 76 <= (mmap[index].mem_base + 77 mmap[index].mem_size))) 78 return 0; 79 80 index++; 81 } 82 83 return -ENOMEM; 84 } 85 86 /******************************************************************************* 87 * This function does linear search for image_id and returns image_desc. 88 ******************************************************************************/ 89 image_desc_t *bl1_plat_get_image_desc(unsigned int image_id) 90 { 91 unsigned int index = 0; 92 93 while (bl1_tbbr_image_descs[index].image_id != INVALID_IMAGE_ID) { 94 if (bl1_tbbr_image_descs[index].image_id == image_id) 95 return &bl1_tbbr_image_descs[index]; 96 index++; 97 } 98 99 return NULL; 100 } 101