source: rtems/cpukit/dtc/libfdt/fdt_addresses.c @ 175263e

Last change on this file since 175263e was 175263e, checked in by Sebastian Huber <sebastian.huber@…>, on Oct 15, 2015 at 9:38:03 AM

libfdt: Initial import

Import from:

git://git.kernel.org/pub/scm/utils/dtc/dtc.git

Commit:

604e61e081e3c6c8fa1a8189c71cb3908a5bbc1e

Date:

2015-09-29T09:09:08Z

  • Property mode set to 100644
File size: 3.1 KB
RevLine 
[175263e]1/*
2 * libfdt - Flat Device Tree manipulation
3 * Copyright (C) 2014 David Gibson <david@gibson.dropbear.id.au>
4 *
5 * libfdt is dual licensed: you can use it either under the terms of
6 * the GPL, or the BSD license, at your option.
7 *
8 *  a) This library is free software; you can redistribute it and/or
9 *     modify it under the terms of the GNU General Public License as
10 *     published by the Free Software Foundation; either version 2 of the
11 *     License, or (at your option) any later version.
12 *
13 *     This library is distributed in the hope that it will be useful,
14 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
15 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 *     GNU General Public License for more details.
17 *
18 *     You should have received a copy of the GNU General Public
19 *     License along with this library; if not, write to the Free
20 *     Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
21 *     MA 02110-1301 USA
22 *
23 * Alternatively,
24 *
25 *  b) Redistribution and use in source and binary forms, with or
26 *     without modification, are permitted provided that the following
27 *     conditions are met:
28 *
29 *     1. Redistributions of source code must retain the above
30 *        copyright notice, this list of conditions and the following
31 *        disclaimer.
32 *     2. Redistributions in binary form must reproduce the above
33 *        copyright notice, this list of conditions and the following
34 *        disclaimer in the documentation and/or other materials
35 *        provided with the distribution.
36 *
37 *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
38 *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
39 *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
40 *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
41 *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
42 *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43 *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
44 *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
45 *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46 *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
47 *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
48 *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
49 *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
50 */
51#include "libfdt_env.h"
52
53#include <fdt.h>
54#include <libfdt.h>
55
56#include "libfdt_internal.h"
57
58int fdt_address_cells(const void *fdt, int nodeoffset)
59{
60        const fdt32_t *ac;
61        int val;
62        int len;
63
64        ac = fdt_getprop(fdt, nodeoffset, "#address-cells", &len);
65        if (!ac)
66                return 2;
67
68        if (len != sizeof(*ac))
69                return -FDT_ERR_BADNCELLS;
70
71        val = fdt32_to_cpu(*ac);
72        if ((val <= 0) || (val > FDT_MAX_NCELLS))
73                return -FDT_ERR_BADNCELLS;
74
75        return val;
76}
77
78int fdt_size_cells(const void *fdt, int nodeoffset)
79{
80        const fdt32_t *sc;
81        int val;
82        int len;
83
84        sc = fdt_getprop(fdt, nodeoffset, "#size-cells", &len);
85        if (!sc)
86                return 2;
87
88        if (len != sizeof(*sc))
89                return -FDT_ERR_BADNCELLS;
90
91        val = fdt32_to_cpu(*sc);
92        if ((val < 0) || (val > FDT_MAX_NCELLS))
93                return -FDT_ERR_BADNCELLS;
94
95        return val;
96}
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