blob: 6025fa1fe8feeb046a68605776d0d1ecac1efe9f
1 | /* |
2 | * libfdt - Flat Device Tree manipulation |
3 | * Copyright (C) 2006 David Gibson, IBM Corporation. |
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 | |
58 | int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name, |
59 | const void *val, int len) |
60 | { |
61 | void *propval; |
62 | int proplen; |
63 | |
64 | propval = fdt_getprop_w(fdt, nodeoffset, name, &proplen); |
65 | if (! propval) |
66 | return proplen; |
67 | |
68 | if (proplen != len) |
69 | return -FDT_ERR_NOSPACE; |
70 | |
71 | memcpy(propval, val, len); |
72 | return 0; |
73 | } |
74 | |
75 | static void _fdt_nop_region(void *start, int len) |
76 | { |
77 | uint32_t *p; |
78 | |
79 | for (p = start; (char *)p < ((char *)start + len); p++) |
80 | *p = cpu_to_fdt32(FDT_NOP); |
81 | } |
82 | |
83 | int fdt_nop_property(void *fdt, int nodeoffset, const char *name) |
84 | { |
85 | struct fdt_property *prop; |
86 | int len; |
87 | |
88 | prop = fdt_get_property_w(fdt, nodeoffset, name, &len); |
89 | if (! prop) |
90 | return len; |
91 | |
92 | _fdt_nop_region(prop, len + sizeof(*prop)); |
93 | |
94 | return 0; |
95 | } |
96 | |
97 | int _fdt_node_end_offset(void *fdt, int offset) |
98 | { |
99 | int depth = 0; |
100 | |
101 | while ((offset >= 0) && (depth >= 0)) |
102 | offset = fdt_next_node(fdt, offset, &depth); |
103 | |
104 | return offset; |
105 | } |
106 | |
107 | int fdt_nop_node(void *fdt, int nodeoffset) |
108 | { |
109 | int endoffset; |
110 | |
111 | endoffset = _fdt_node_end_offset(fdt, nodeoffset); |
112 | if (endoffset < 0) |
113 | return endoffset; |
114 | |
115 | _fdt_nop_region(fdt_offset_ptr_w(fdt, nodeoffset, 0), |
116 | endoffset - nodeoffset); |
117 | return 0; |
118 | } |
119 |