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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / a35747b5e1261adfb27ab87575dea4b17e247da2 / . / tools / stm32image.c
blob: 437e384d371cad58ab719824c52149498d337a58 [file] [log] [blame]
Patrick Delaunay81260e32018-03-12 10:46:04 +0100[diff] [blame]1/*
2 * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
3 *
4 * SPDX-License-Identifier: GPL-2.0+ BSD-3-Clause
5 */
6
7#include <image.h>
8#include "imagetool.h"
9
10/* magic ='S' 'T' 'M' 0x32 */
11#define HEADER_MAGIC be32_to_cpu(0x53544D32)
12#define VER_MAJOR_IDX 2
13#define VER_MINOR_IDX 1
14#define VER_VARIANT_IDX 0
15#define HEADER_VERSION_V1 0x1
16/* default option : bit0 => no signature */
17#define HEADER_DEFAULT_OPTION (cpu_to_le32(0x00000001))
18
19struct stm32_header {
20 uint32_t magic_number;
21 uint32_t image_signature[64 / 4];
22 uint32_t image_checksum;
23 uint8_t header_version[4];
24 uint32_t image_length;
25 uint32_t image_entry_point;
26 uint32_t reserved1;
27 uint32_t load_address;
28 uint32_t reserved2;
29 uint32_t version_number;
30 uint32_t option_flags;
31 uint32_t ecdsa_algorithm;
32 uint32_t ecdsa_public_key[64 / 4];
33 uint32_t padding[84 / 4];
34};
35
36static struct stm32_header stm32image_header;
37
38static void stm32image_default_header(struct stm32_header *ptr)
39{
40 if (!ptr)
41 return;
42
43 ptr->magic_number = HEADER_MAGIC;
44 ptr->header_version[VER_MAJOR_IDX] = HEADER_VERSION_V1;
45 ptr->option_flags = HEADER_DEFAULT_OPTION;
46 ptr->ecdsa_algorithm = 1;
47}
48
49static uint32_t stm32image_checksum(void *start, uint32_t len)
50{
51 uint32_t csum = 0;
52 uint32_t hdr_len = sizeof(struct stm32_header);
53 uint8_t *p;
54
55 if (len < hdr_len)
56 return 0;
57
58 p = start + hdr_len;
59 len -= hdr_len;
60
61 while (len > 0) {
62 csum += *p;
63 p++;
64 len--;
65 }
66
67 return csum;
68}
69
70static int stm32image_check_image_types(uint8_t type)
71{
72 if (type == IH_TYPE_STM32IMAGE)
73 return EXIT_SUCCESS;
74 return EXIT_FAILURE;
75}
76
77static int stm32image_verify_header(unsigned char *ptr, int image_size,
78 struct image_tool_params *params)
79{
80 struct stm32_header *stm32hdr = (struct stm32_header *)ptr;
81 int i;
82
83 if (image_size < sizeof(struct stm32_header))
84 return -1;
85 if (stm32hdr->magic_number != HEADER_MAGIC)
86 return -1;
87 if (stm32hdr->header_version[VER_MAJOR_IDX] != HEADER_VERSION_V1)
88 return -1;
89 if (stm32hdr->reserved1 || stm32hdr->reserved2)
90 return -1;
91 for (i = 0; i < (sizeof(stm32hdr->padding) / 4); i++) {
92 if (stm32hdr->padding[i] != 0)
93 return -1;
94 }
95
96 return 0;
97}
98
99static void stm32image_print_header(const void *ptr)
100{
101 struct stm32_header *stm32hdr = (struct stm32_header *)ptr;
102
103 printf("Image Type : STMicroelectronics STM32 V%d.%d\n",
104 stm32hdr->header_version[VER_MAJOR_IDX],
105 stm32hdr->header_version[VER_MINOR_IDX]);
106 printf("Image Size : %lu bytes\n",
107 (unsigned long)le32_to_cpu(stm32hdr->image_length));
108 printf("Image Load : 0x%08x\n",
109 le32_to_cpu(stm32hdr->load_address));
110 printf("Entry Point : 0x%08x\n",
111 le32_to_cpu(stm32hdr->image_entry_point));
112 printf("Checksum : 0x%08x\n",
113 le32_to_cpu(stm32hdr->image_checksum));
114 printf("Option : 0x%08x\n",
115 le32_to_cpu(stm32hdr->option_flags));
116}
117
118static void stm32image_set_header(void *ptr, struct stat *sbuf, int ifd,
119 struct image_tool_params *params)
120{
121 struct stm32_header *stm32hdr = (struct stm32_header *)ptr;
122
123 stm32image_default_header(stm32hdr);
124
125 stm32hdr->load_address = cpu_to_le32(params->addr);
126 stm32hdr->image_entry_point = cpu_to_le32(params->ep);
127 stm32hdr->image_length = cpu_to_le32((uint32_t)sbuf->st_size -
128 sizeof(struct stm32_header));
129 stm32hdr->image_checksum = stm32image_checksum(ptr, sbuf->st_size);
130}
131
132/*
133 * stm32image parameters
134 */
135U_BOOT_IMAGE_TYPE(
136 stm32image,
137 "STMicroelectronics STM32MP Image support",
138 sizeof(struct stm32_header),
139 (void *)&stm32image_header,
140 NULL,
141 stm32image_verify_header,
142 stm32image_print_header,
143 stm32image_set_header,
144 NULL,
145 stm32image_check_image_types,
146 NULL,
147 NULL
148);