262 lines
6.9 KiB
C
262 lines
6.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
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/*
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* Copyright (C) 2018, STMicroelectronics - All Rights Reserved
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*/
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#include <image.h>
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#include "imagetool.h"
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/* magic ='S' 'T' 'M' 0x32 */
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#define HEADER_MAGIC be32_to_cpu(0x53544D32)
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#define VER_MAJOR 2
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#define VER_MINOR 1
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#define VER_VARIANT 0
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#define HEADER_VERSION_V1 0x1
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#define HEADER_VERSION_V2 0x2
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/* default option : bit0 => no signature */
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#define HEADER_DEFAULT_OPTION (cpu_to_le32(0x00000001))
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/* default binary type for U-Boot */
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#define HEADER_TYPE_UBOOT (cpu_to_le32(0x00000000))
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#define PADDING_HEADER_MAGIC (cpu_to_le32(0xFFFF5453))
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#define PADDING_HEADER_FLAG (1ULL << 31)
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#define PADDING_HEADER_LENGTH 0x180
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struct stm32_header_v1 {
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uint32_t magic_number;
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uint8_t image_signature[64];
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uint32_t image_checksum;
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uint8_t header_version[4];
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uint32_t image_length;
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uint32_t image_entry_point;
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uint32_t reserved1;
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uint32_t load_address;
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uint32_t reserved2;
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uint32_t version_number;
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/* V1.0 specific content */
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uint32_t option_flags;
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uint32_t ecdsa_algorithm;
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uint8_t ecdsa_public_key[64];
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uint8_t padding[83];
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uint8_t binary_type;
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};
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struct stm32_header_v2 {
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uint32_t magic_number;
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uint8_t image_signature[64];
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uint32_t image_checksum;
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uint8_t header_version[4];
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uint32_t image_length;
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uint32_t image_entry_point;
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uint32_t reserved1;
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uint32_t load_address;
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uint32_t reserved2;
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uint32_t version_number;
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/* V2.0 specific content */
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uint32_t extension_flags;
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uint32_t extension_headers_length;
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uint32_t binary_type;
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uint8_t padding[16];
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uint32_t extension_header_type;
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uint32_t extension_header_length;
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uint8_t extension_padding[376];
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};
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static struct stm32_header_v1 stm32image_header_v1;
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static struct stm32_header_v2 stm32image_header_v2;
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static uint32_t stm32image_checksum(void *start, uint32_t len,
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uint32_t header_size)
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{
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uint32_t csum = 0;
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uint8_t *p;
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if (len < header_size) {
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return 0;
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}
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p = (unsigned char *)start + header_size;
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len -= header_size;
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while (len > 0) {
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csum += *p;
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p++;
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len--;
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}
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return csum;
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}
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static int stm32image_check_image_types_v1(uint8_t type)
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{
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if (type == IH_TYPE_STM32IMAGE)
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return EXIT_SUCCESS;
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return EXIT_FAILURE;
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}
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static int stm32image_check_image_types_v2(uint8_t type)
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{
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if (type == IH_TYPE_STM32IMAGE_V2)
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return EXIT_SUCCESS;
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return EXIT_FAILURE;
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}
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static int stm32image_verify_header_v1(unsigned char *ptr, int image_size,
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struct image_tool_params *params)
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{
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struct stm32_header_v1 *stm32hdr = (struct stm32_header_v1 *)ptr;
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int i;
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if (image_size < sizeof(struct stm32_header_v1))
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return -1;
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if (stm32hdr->magic_number != HEADER_MAGIC)
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return -1;
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if (stm32hdr->header_version[VER_MAJOR] != HEADER_VERSION_V1)
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return -1;
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if (stm32hdr->reserved1 || stm32hdr->reserved2)
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return -1;
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for (i = 0; i < (sizeof(stm32hdr->padding) / 4); i++) {
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if (stm32hdr->padding[i] != 0)
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return -1;
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}
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return 0;
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}
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static int stm32image_verify_header_v2(unsigned char *ptr, int image_size,
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struct image_tool_params *params)
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{
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struct stm32_header_v2 *stm32hdr = (struct stm32_header_v2 *)ptr;
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int i;
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if (image_size < sizeof(struct stm32_header_v2))
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return -1;
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if (stm32hdr->magic_number != HEADER_MAGIC)
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return -1;
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if (stm32hdr->header_version[VER_MAJOR] != HEADER_VERSION_V2)
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return -1;
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if (stm32hdr->reserved1 || stm32hdr->reserved2)
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return -1;
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for (i = 0; i < (sizeof(stm32hdr->padding) / 4); i++) {
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if (stm32hdr->padding[i] != 0)
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return -1;
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}
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return 0;
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}
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static void stm32image_print_header(const void *ptr, struct image_tool_params *params)
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{
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struct stm32_header_v1 *stm32hdr_v1 = (struct stm32_header_v1 *)ptr;
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struct stm32_header_v2 *stm32hdr_v2 = (struct stm32_header_v2 *)ptr;
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printf("Image Type : STMicroelectronics STM32 V%d.%d\n",
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stm32hdr_v1->header_version[VER_MAJOR],
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stm32hdr_v1->header_version[VER_MINOR]);
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printf("Image Size : %lu bytes\n",
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(unsigned long)le32_to_cpu(stm32hdr_v1->image_length));
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printf("Image Load : 0x%08x\n",
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le32_to_cpu(stm32hdr_v1->load_address));
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printf("Entry Point : 0x%08x\n",
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le32_to_cpu(stm32hdr_v1->image_entry_point));
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printf("Checksum : 0x%08x\n",
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le32_to_cpu(stm32hdr_v1->image_checksum));
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switch (stm32hdr_v1->header_version[VER_MAJOR]) {
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case HEADER_VERSION_V1:
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printf("Option : 0x%08x\n",
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le32_to_cpu(stm32hdr_v1->option_flags));
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printf("BinaryType : 0x%08x\n",
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le32_to_cpu(stm32hdr_v1->binary_type));
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break;
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case HEADER_VERSION_V2:
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printf("Extension : 0x%08x\n",
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le32_to_cpu(stm32hdr_v2->extension_flags));
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break;
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default:
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printf("Incorrect header version\n");
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}
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}
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static void stm32image_set_header_v1(void *ptr, struct stat *sbuf, int ifd,
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struct image_tool_params *params)
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{
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struct stm32_header_v1 *stm32hdr = (struct stm32_header_v1 *)ptr;
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stm32hdr->magic_number = HEADER_MAGIC;
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stm32hdr->version_number = cpu_to_le32(0);
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stm32hdr->header_version[VER_MAJOR] = HEADER_VERSION_V1;
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stm32hdr->option_flags = HEADER_DEFAULT_OPTION;
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stm32hdr->ecdsa_algorithm = cpu_to_le32(1);
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stm32hdr->binary_type = HEADER_TYPE_UBOOT;
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stm32hdr->load_address = cpu_to_le32(params->addr);
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stm32hdr->image_entry_point = cpu_to_le32(params->ep);
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stm32hdr->image_length = cpu_to_le32((uint32_t)sbuf->st_size -
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sizeof(*stm32hdr));
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stm32hdr->image_checksum =
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cpu_to_le32(stm32image_checksum(ptr, sbuf->st_size,
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sizeof(*stm32hdr)));
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}
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static void stm32image_set_header_v2(void *ptr, struct stat *sbuf, int ifd,
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struct image_tool_params *params)
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{
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struct stm32_header_v2 *stm32hdr = (struct stm32_header_v2 *)ptr;
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stm32hdr->magic_number = HEADER_MAGIC;
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stm32hdr->version_number = cpu_to_le32(0);
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stm32hdr->header_version[VER_MAJOR] = HEADER_VERSION_V2;
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stm32hdr->extension_flags =
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cpu_to_le32(PADDING_HEADER_FLAG);
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stm32hdr->extension_headers_length =
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cpu_to_le32(PADDING_HEADER_LENGTH);
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stm32hdr->extension_header_type =
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cpu_to_le32(PADDING_HEADER_MAGIC);
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stm32hdr->extension_header_length =
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cpu_to_le32(PADDING_HEADER_LENGTH);
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stm32hdr->load_address = cpu_to_le32(params->addr);
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stm32hdr->image_entry_point = cpu_to_le32(params->ep);
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stm32hdr->image_length = cpu_to_le32((uint32_t)sbuf->st_size -
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sizeof(*stm32hdr));
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stm32hdr->image_checksum =
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cpu_to_le32(stm32image_checksum(ptr, sbuf->st_size,
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sizeof(*stm32hdr)));
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}
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/*
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* stm32image parameters
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*/
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U_BOOT_IMAGE_TYPE(
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stm32image,
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"STMicroelectronics STM32MP Image support",
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sizeof(struct stm32_header_v1),
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(void *)&stm32image_header_v1,
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NULL,
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stm32image_verify_header_v1,
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stm32image_print_header,
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stm32image_set_header_v1,
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NULL,
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stm32image_check_image_types_v1,
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NULL,
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NULL
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);
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U_BOOT_IMAGE_TYPE(
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stm32imagev2,
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"STMicroelectronics STM32MP Image V2.0 support",
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sizeof(struct stm32_header_v2),
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(void *)&stm32image_header_v2,
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NULL,
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stm32image_verify_header_v2,
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stm32image_print_header,
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stm32image_set_header_v2,
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NULL,
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stm32image_check_image_types_v2,
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NULL,
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NULL
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);
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