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@@ -0,0 +1,148 @@
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+/*
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+ * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
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+ *
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+ * SPDX-License-Identifier: GPL-2.0+ BSD-3-Clause
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+ */
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+
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+#include <image.h>
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+#include "imagetool.h"
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+
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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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+
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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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+
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+static struct stm32_header stm32image_header;
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+
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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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+
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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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+
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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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+
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+ if (len < hdr_len)
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+ return 0;
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+
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+ p = start + hdr_len;
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+ len -= hdr_len;
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+
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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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+
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+ return csum;
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+}
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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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+
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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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+
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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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+
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+ return 0;
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+}
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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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+
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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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+
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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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+
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+ stm32image_default_header(stm32hdr);
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+
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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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+/*
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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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