fdt_empty_tree.c revision 9537 
1/*
2 * libfdt - Flat Device Tree manipulation
3 * Copyright (C) 2012 David Gibson, IBM Corporation.
4 *
5 *     Redistribution and use in source and binary forms, with or
6 *     without modification, are permitted provided that the following
7 *     conditions are met:
8 *
9 *     1. Redistributions of source code must retain the above
10 *        copyright notice, this list of conditions and the following
11 *        disclaimer.
12 *     2. Redistributions in binary form must reproduce the above
13 *        copyright notice, this list of conditions and the following
14 *        disclaimer in the documentation and/or other materials
15 *        provided with the distribution.
16 *
17 *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
18 *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
19 *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
20 *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
22 *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
29 *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31#include <fdt.h>
32#include <libfdt.h>
33
34#include "libfdt_env.h"
35#include "libfdt_internal.h"
36
37int fdt_create_empty_tree(void *buf, int bufsize)
38{
39        int err;
40
41        err = fdt_create(buf, bufsize);
42        if (err)
43                return err;
44
45        err = fdt_finish_reservemap(buf);
46        if (err)
47                return err;
48
49        err = fdt_begin_node(buf, "");
50        if (err)
51                return err;
52
53        err =  fdt_end_node(buf);
54        if (err)
55                return err;
56
57        err = fdt_finish(buf);
58        if (err)
59                return err;
60
61        return fdt_open_into(buf, buf, bufsize);
62}
63
64