/*
 * 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_BOOTUTIL_
#define H_BOOTUTIL_

#include <inttypes.h>

#ifdef __cplusplus
extern "C" {
#endif

/** Just boot whatever is in slot 0. */
#define BOOT_SWAP_TYPE_NONE     1

/** Swap to slot 1.  Absent a confirm command, revert back on next boot. */
#define BOOT_SWAP_TYPE_TEST     2

/** Swap to slot 1 permanently. */
#define BOOT_SWAP_TYPE_PERM     3

/** Swap back to alternate slot.  A confirm changes this state to NONE. */
#define BOOT_SWAP_TYPE_REVERT   4

#define BOOT_SWAP_TYPE_FAIL     0xff

struct image_header;
/**
 * A response object provided by the boot loader code; indicates where to jump
 * to execute the main image.
 */
struct boot_rsp {
    /** A pointer to the header of the image to be executed. */
    const struct image_header *br_hdr;

    /**
     * The flash offset of the image to execute.  Indicates the position of
     * the image header.
     */
    uint8_t br_flash_id;
    uint32_t br_image_addr;
};

/* you must have pre-allocated all the entries within this structure */
int boot_go(struct boot_rsp *rsp);

int boot_swap_type(void);

int boot_set_pending(int permanent);
int boot_set_confirmed(void);

#define SPLIT_GO_OK                 (0)
#define SPLIT_GO_NON_MATCHING       (-1)
#define SPLIT_GO_ERR                (-2)
int
split_go(int loader_slot, int split_slot, void **entry);

#ifdef __cplusplus
}
#endif

#endif