148 lines
3.6 KiB
C
148 lines
3.6 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_IDX 2
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#define VER_MINOR_IDX 1
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#define VER_VARIANT_IDX 0
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#define HEADER_VERSION_V1 0x1
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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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struct stm32_header {
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uint32_t magic_number;
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uint32_t image_signature[64 / 4];
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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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uint32_t option_flags;
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uint32_t ecdsa_algorithm;
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uint32_t ecdsa_public_key[64 / 4];
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uint32_t padding[84 / 4];
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};
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static struct stm32_header stm32image_header;
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static void stm32image_default_header(struct stm32_header *ptr)
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{
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if (!ptr)
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return;
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ptr->magic_number = HEADER_MAGIC;
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ptr->header_version[VER_MAJOR_IDX] = HEADER_VERSION_V1;
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ptr->option_flags = HEADER_DEFAULT_OPTION;
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ptr->ecdsa_algorithm = 1;
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}
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static uint32_t stm32image_checksum(void *start, uint32_t len)
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{
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uint32_t csum = 0;
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uint32_t hdr_len = sizeof(struct stm32_header);
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uint8_t *p;
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if (len < hdr_len)
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return 0;
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p = start + hdr_len;
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len -= hdr_len;
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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(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_verify_header(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 *stm32hdr = (struct stm32_header *)ptr;
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int i;
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if (image_size < sizeof(struct stm32_header))
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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_IDX] != 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 void stm32image_print_header(const void *ptr)
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{
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struct stm32_header *stm32hdr = (struct stm32_header *)ptr;
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printf("Image Type : STMicroelectronics STM32 V%d.%d\n",
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stm32hdr->header_version[VER_MAJOR_IDX],
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stm32hdr->header_version[VER_MINOR_IDX]);
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printf("Image Size : %lu bytes\n",
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(unsigned long)le32_to_cpu(stm32hdr->image_length));
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printf("Image Load : 0x%08x\n",
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le32_to_cpu(stm32hdr->load_address));
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printf("Entry Point : 0x%08x\n",
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le32_to_cpu(stm32hdr->image_entry_point));
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printf("Checksum : 0x%08x\n",
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le32_to_cpu(stm32hdr->image_checksum));
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printf("Option : 0x%08x\n",
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le32_to_cpu(stm32hdr->option_flags));
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}
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static void stm32image_set_header(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 *stm32hdr = (struct stm32_header *)ptr;
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stm32image_default_header(stm32hdr);
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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(struct stm32_header));
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stm32hdr->image_checksum = stm32image_checksum(ptr, sbuf->st_size);
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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),
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(void *)&stm32image_header,
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NULL,
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stm32image_verify_header,
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stm32image_print_header,
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stm32image_set_header,
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NULL,
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stm32image_check_image_types,
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NULL,
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NULL
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);
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