/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2013 Juniper Networks, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
#include "opt_platform.h"

#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/linker.h>

#include <machine/metadata.h>
#include <x86/fdt.h>

#include <dev/fdt/fdt_common.h>
#include <dev/ofw/openfirm.h>

int
x86_init_fdt(void)
{
        void *dtbp;
        int error;

        if (!OF_install(OFW_FDT, 0)) {
                error = ENXIO;
                goto out;
        }

        dtbp = MD_FETCH(preload_kmdp, MODINFOMD_DTBP, void *);

#if defined(FDT_DTB_STATIC)
        /*
         * In case the device tree blob was not retrieved (from metadata) try
         * to use the statically embedded one.
         */
        if (dtbp == NULL)
                dtbp = &fdt_static_dtb;
#endif

        if (dtbp == NULL) {
                error = ENOENT;
                goto out;
        }

        error = OF_init(dtbp) ? ENXIO : 0;

 out:
        return (error);
}