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