1 /* 2 * Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <assert.h> 32 #include <bl_common.h> 33 #include <debug.h> 34 #include <errno.h> 35 #include <plat_arm.h> 36 #include <platform_def.h> 37 #include <tbbr_img_desc.h> 38 #include <utils.h> 39 40 /* Struct to keep track of usable memory */ 41 typedef struct bl1_mem_info { 42 uintptr_t mem_base; 43 unsigned int mem_size; 44 } bl1_mem_info_t; 45 46 bl1_mem_info_t fwu_addr_map_secure[] = { 47 { 48 .mem_base = ARM_SHARED_RAM_BASE, 49 .mem_size = ARM_SHARED_RAM_SIZE 50 }, 51 { 52 .mem_size = 0 53 } 54 }; 55 56 bl1_mem_info_t fwu_addr_map_non_secure[] = { 57 { 58 .mem_base = ARM_NS_DRAM1_BASE, 59 .mem_size = ARM_NS_DRAM1_SIZE 60 }, 61 { 62 .mem_base = PLAT_ARM_NVM_BASE, 63 .mem_size = PLAT_ARM_NVM_SIZE 64 }, 65 { 66 .mem_size = 0 67 } 68 }; 69 70 int bl1_plat_mem_check(uintptr_t mem_base, 71 unsigned int mem_size, 72 unsigned int flags) 73 { 74 unsigned int index = 0; 75 bl1_mem_info_t *mmap; 76 77 assert(mem_base); 78 assert(mem_size); 79 /* 80 * The caller of this function is responsible for checking upfront that 81 * the end address doesn't overflow. We double-check this in debug 82 * builds. 83 */ 84 assert(!check_uptr_overflow(mem_base, mem_size - 1)); 85 86 /* 87 * Check the given image source and size. 88 */ 89 if (GET_SECURITY_STATE(flags) == SECURE) 90 mmap = fwu_addr_map_secure; 91 else 92 mmap = fwu_addr_map_non_secure; 93 94 while (mmap[index].mem_size) { 95 if ((mem_base >= mmap[index].mem_base) && 96 ((mem_base + mem_size) 97 <= (mmap[index].mem_base + 98 mmap[index].mem_size))) 99 return 0; 100 101 index++; 102 } 103 104 return -ENOMEM; 105 } 106 107 /******************************************************************************* 108 * This function does linear search for image_id and returns image_desc. 109 ******************************************************************************/ 110 image_desc_t *bl1_plat_get_image_desc(unsigned int image_id) 111 { 112 unsigned int index = 0; 113 114 while (bl1_tbbr_image_descs[index].image_id != INVALID_IMAGE_ID) { 115 if (bl1_tbbr_image_descs[index].image_id == image_id) 116 return &bl1_tbbr_image_descs[index]; 117 index++; 118 } 119 120 return NULL; 121 } 122