1 // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
3 * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
9 /* magic ='S' 'T' 'M' 0x32 */
10 #define HEADER_MAGIC be32_to_cpu(0x53544D32)
11 #define VER_MAJOR_IDX 2
12 #define VER_MINOR_IDX 1
13 #define VER_VARIANT_IDX 0
14 #define HEADER_VERSION_V1 0x1
15 /* default option : bit0 => no signature */
16 #define HEADER_DEFAULT_OPTION (cpu_to_le32(0x00000001))
19 uint32_t magic_number;
20 uint32_t image_signature[64 / 4];
21 uint32_t image_checksum;
22 uint8_t header_version[4];
23 uint32_t image_length;
24 uint32_t image_entry_point;
26 uint32_t load_address;
28 uint32_t version_number;
29 uint32_t option_flags;
30 uint32_t ecdsa_algorithm;
31 uint32_t ecdsa_public_key[64 / 4];
32 uint32_t padding[84 / 4];
35 static struct stm32_header stm32image_header;
37 static void stm32image_default_header(struct stm32_header *ptr)
42 ptr->magic_number = HEADER_MAGIC;
43 ptr->header_version[VER_MAJOR_IDX] = HEADER_VERSION_V1;
44 ptr->option_flags = HEADER_DEFAULT_OPTION;
45 ptr->ecdsa_algorithm = 1;
48 static uint32_t stm32image_checksum(void *start, uint32_t len)
51 uint32_t hdr_len = sizeof(struct stm32_header);
69 static int stm32image_check_image_types(uint8_t type)
71 if (type == IH_TYPE_STM32IMAGE)
76 static int stm32image_verify_header(unsigned char *ptr, int image_size,
77 struct image_tool_params *params)
79 struct stm32_header *stm32hdr = (struct stm32_header *)ptr;
82 if (image_size < sizeof(struct stm32_header))
84 if (stm32hdr->magic_number != HEADER_MAGIC)
86 if (stm32hdr->header_version[VER_MAJOR_IDX] != HEADER_VERSION_V1)
88 if (stm32hdr->reserved1 || stm32hdr->reserved2)
90 for (i = 0; i < (sizeof(stm32hdr->padding) / 4); i++) {
91 if (stm32hdr->padding[i] != 0)
98 static void stm32image_print_header(const void *ptr)
100 struct stm32_header *stm32hdr = (struct stm32_header *)ptr;
102 printf("Image Type : STMicroelectronics STM32 V%d.%d\n",
103 stm32hdr->header_version[VER_MAJOR_IDX],
104 stm32hdr->header_version[VER_MINOR_IDX]);
105 printf("Image Size : %lu bytes\n",
106 (unsigned long)le32_to_cpu(stm32hdr->image_length));
107 printf("Image Load : 0x%08x\n",
108 le32_to_cpu(stm32hdr->load_address));
109 printf("Entry Point : 0x%08x\n",
110 le32_to_cpu(stm32hdr->image_entry_point));
111 printf("Checksum : 0x%08x\n",
112 le32_to_cpu(stm32hdr->image_checksum));
113 printf("Option : 0x%08x\n",
114 le32_to_cpu(stm32hdr->option_flags));
117 static void stm32image_set_header(void *ptr, struct stat *sbuf, int ifd,
118 struct image_tool_params *params)
120 struct stm32_header *stm32hdr = (struct stm32_header *)ptr;
122 stm32image_default_header(stm32hdr);
124 stm32hdr->load_address = cpu_to_le32(params->addr);
125 stm32hdr->image_entry_point = cpu_to_le32(params->ep);
126 stm32hdr->image_length = cpu_to_le32((uint32_t)sbuf->st_size -
127 sizeof(struct stm32_header));
128 stm32hdr->image_checksum = stm32image_checksum(ptr, sbuf->st_size);
132 * stm32image parameters
136 "STMicroelectronics STM32MP Image support",
137 sizeof(struct stm32_header),
138 (void *)&stm32image_header,
140 stm32image_verify_header,
141 stm32image_print_header,
142 stm32image_set_header,
144 stm32image_check_image_types,