1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2013 Juniper Networks, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 #include "opt_platform.h"
31
32 #include <sys/param.h>
33 #include <sys/kernel.h>
34 #include <sys/bus.h>
35 #include <sys/linker.h>
36
37 #include <machine/metadata.h>
38 #include <x86/fdt.h>
39
40 #include <dev/fdt/fdt_common.h>
41 #include <dev/ofw/openfirm.h>
42
43 int
x86_init_fdt(void)44 x86_init_fdt(void)
45 {
46 void *dtbp, *mdp;
47 int error;
48
49 if (OF_install(OFW_FDT, 0) == FALSE) {
50 error = ENXIO;
51 goto out;
52 }
53
54 mdp = preload_search_by_type("elf kernel");
55 if (mdp == NULL)
56 mdp = preload_search_by_type("elf32 kernel");
57 dtbp = MD_FETCH(mdp, MODINFOMD_DTBP, void *);
58
59 #if defined(FDT_DTB_STATIC)
60 /*
61 * In case the device tree blob was not retrieved (from metadata) try
62 * to use the statically embedded one.
63 */
64 if (dtbp == NULL)
65 dtbp = &fdt_static_dtb;
66 #endif
67
68 if (dtbp == NULL) {
69 error = ENOENT;
70 goto out;
71 }
72
73 error = OF_init(dtbp) ? ENXIO : 0;
74
75 out:
76 return (error);
77 }
78