1 /*
2 * Copyright (c) 2015-2026, 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 #include <inttypes.h>
10
11 #include <platform_def.h>
12
13 #include <bl1/tbbr/tbbr_img_desc.h>
14 #include <common/bl_common.h>
15 #include <common/debug.h>
16 #include <lib/cassert.h>
17 #include <lib/utils.h>
18 #include <plat/arm/common/plat_arm.h>
19 #include <plat/common/platform.h>
20
21 #pragma weak bl1_plat_get_image_desc
22
23 /* Compile-time checks for static FWU map entries. */
24 CASSERT(!check_uptr_overflow(ARM_SHARED_RAM_BASE, ARM_SHARED_RAM_SIZE),
25 assert_fwu_secure_ram_overflow);
26 CASSERT(!check_uptr_overflow(ARM_NS_DRAM1_BASE, ARM_NS_DRAM1_SIZE),
27 assert_fwu_ns_dram1_overflow);
28 CASSERT(!check_uptr_overflow(PLAT_ARM_NVM_BASE, PLAT_ARM_NVM_SIZE),
29 assert_fwu_ns_nvm_overflow);
30
31 /* Struct to keep track of usable memory */
32 typedef struct bl1_mem_info {
33 uintptr_t mem_base;
34 unsigned int mem_size;
35 } bl1_mem_info_t;
36
37 static const bl1_mem_info_t fwu_addr_map_secure[] = {
38 {
39 .mem_base = ARM_SHARED_RAM_BASE,
40 .mem_size = ARM_SHARED_RAM_SIZE
41 },
42 {
43 .mem_size = 0
44 }
45 };
46
47 static const bl1_mem_info_t fwu_addr_map_non_secure[] = {
48 {
49 .mem_base = ARM_NS_DRAM1_BASE,
50 .mem_size = ARM_NS_DRAM1_SIZE
51 },
52 {
53 .mem_base = PLAT_ARM_NVM_BASE,
54 .mem_size = PLAT_ARM_NVM_SIZE
55 },
56 {
57 .mem_size = 0
58 }
59 };
60
bl1_plat_mem_check(uintptr_t mem_base,unsigned int mem_size,unsigned int flags)61 int bl1_plat_mem_check(uintptr_t mem_base,
62 unsigned int mem_size,
63 unsigned int flags)
64 {
65 unsigned int index = 0;
66 const bl1_mem_info_t *mmap;
67 uintptr_t end;
68 uintptr_t region_end;
69
70 /*
71 * The caller of this function is responsible for checking upfront that
72 * the end address doesn't overflow builds. We double check this.
73 */
74 if ((mem_base == 0U) || (mem_size == 0U) ||
75 check_uptr_overflow(mem_base, mem_size)) {
76 return -ENOMEM;
77 }
78
79 end = mem_base + mem_size;
80
81 /*
82 * Check the given image source and size.
83 */
84 if (GET_SECURITY_STATE(flags) == SECURE) {
85 mmap = fwu_addr_map_secure;
86 } else {
87 mmap = fwu_addr_map_non_secure;
88 }
89
90 while (mmap[index].mem_size > 0U) {
91 region_end = mmap[index].mem_base + mmap[index].mem_size;
92
93 if ((mem_base >= mmap[index].mem_base) &&
94 (end <= region_end)) {
95 return 0;
96 }
97
98 index++;
99 }
100
101 return -ENOMEM;
102 }
103
104 /*******************************************************************************
105 * This function does linear search for image_id and returns image_desc.
106 ******************************************************************************/
bl1_plat_get_image_desc(unsigned int image_id)107 image_desc_t *bl1_plat_get_image_desc(unsigned int image_id)
108 {
109 unsigned int index = 0;
110
111 while (bl1_tbbr_image_descs[index].image_id != INVALID_IMAGE_ID) {
112 if (bl1_tbbr_image_descs[index].image_id == image_id)
113 return &bl1_tbbr_image_descs[index];
114 index++;
115 }
116
117 return NULL;
118 }
119