cmd/img_mgmt/include/img_mgmt/image.h

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

#ifndef H_IMAGE_
#define H_IMAGE_

#include <inttypes.h>

#ifdef __cplusplus
extern "C" {
#endif

#define IMAGE_MAGIC                 0x96f3b83d
#define IMAGE_TLV_INFO_MAGIC        0x6907
#define IMAGE_TLV_PROT_INFO_MAGIC   0x6908

#define IMAGE_HEADER_SIZE           32

/** Image header flags. */
#define IMAGE_F_NON_BOOTABLE        0x00000010 /* Split image app. */

/** Image trailer TLV types. */
#define IMAGE_TLV_SHA256            0x10   /* SHA256 of image hdr and body */

/** Image TLV-specific definitions. */
#define IMAGE_HASH_LEN              32

struct image_version {
    uint8_t iv_major;
    uint8_t iv_minor;
    uint16_t iv_revision;
    uint32_t iv_build_num;
};

/** Image header.  All fields are in little endian byte order. */
struct image_header {
    uint32_t ih_magic;
    uint32_t ih_load_addr;
    uint16_t ih_hdr_size; /* Size of image header (bytes). */
    uint16_t _pad2;
    uint32_t ih_img_size; /* Does not include header. */
    uint32_t ih_flags;    /* IMAGE_F_[...]. */
    struct image_version ih_ver;
    uint32_t _pad3;
};

/** Image TLV header.  All fields in little endian. */
struct image_tlv_info {
    uint16_t it_magic;
    uint16_t it_tlv_tot;  /* size of TLV area (including tlv_info header) */
};

/** Image trailer TLV format. All fields in little endian. */
struct image_tlv {
    uint8_t  it_type;   /* IMAGE_TLV_[...]. */
    uint8_t  _pad;
    uint16_t it_len;    /* Data length (not including TLV header). */
};

_Static_assert(sizeof(struct image_header) == IMAGE_HEADER_SIZE,
               "struct image_header not required size");

#ifdef __cplusplus
}
#endif

#endif