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
bl1_plat_mem_check(uintptr_t mem_base,unsigned int mem_size,unsigned int flags)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 ******************************************************************************/
bl1_plat_get_image_desc(unsigned int image_id)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