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-rw-r--r--scripts/dtc/libfdt/Makefile.libfdt8
-rw-r--r--scripts/dtc/libfdt/fdt.c201
-rw-r--r--scripts/dtc/libfdt/fdt.h60
-rw-r--r--scripts/dtc/libfdt/fdt_ro.c469
-rw-r--r--scripts/dtc/libfdt/fdt_rw.c463
-rw-r--r--scripts/dtc/libfdt/fdt_strerror.c96
-rw-r--r--scripts/dtc/libfdt/fdt_sw.c257
-rw-r--r--scripts/dtc/libfdt/fdt_wip.c145
-rw-r--r--scripts/dtc/libfdt/libfdt.h1076
-rw-r--r--scripts/dtc/libfdt/libfdt_env.h23
-rw-r--r--scripts/dtc/libfdt/libfdt_internal.h95
11 files changed, 2893 insertions, 0 deletions
diff --git a/scripts/dtc/libfdt/Makefile.libfdt b/scripts/dtc/libfdt/Makefile.libfdt
new file mode 100644
index 000000000000..6c42acfa21ec
--- /dev/null
+++ b/scripts/dtc/libfdt/Makefile.libfdt
@@ -0,0 +1,8 @@
1# Makefile.libfdt
2#
3# This is not a complete Makefile of itself. Instead, it is designed to
4# be easily embeddable into other systems of Makefiles.
5#
6LIBFDT_INCLUDES = fdt.h libfdt.h
7LIBFDT_SRCS = fdt.c fdt_ro.c fdt_wip.c fdt_sw.c fdt_rw.c fdt_strerror.c
8LIBFDT_OBJS = $(LIBFDT_SRCS:%.c=%.o)
diff --git a/scripts/dtc/libfdt/fdt.c b/scripts/dtc/libfdt/fdt.c
new file mode 100644
index 000000000000..2acaec5923ae
--- /dev/null
+++ b/scripts/dtc/libfdt/fdt.c
@@ -0,0 +1,201 @@
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
58int fdt_check_header(const void *fdt)
59{
60 if (fdt_magic(fdt) == FDT_MAGIC) {
61 /* Complete tree */
62 if (fdt_version(fdt) < FDT_FIRST_SUPPORTED_VERSION)
63 return -FDT_ERR_BADVERSION;
64 if (fdt_last_comp_version(fdt) > FDT_LAST_SUPPORTED_VERSION)
65 return -FDT_ERR_BADVERSION;
66 } else if (fdt_magic(fdt) == FDT_SW_MAGIC) {
67 /* Unfinished sequential-write blob */
68 if (fdt_size_dt_struct(fdt) == 0)
69 return -FDT_ERR_BADSTATE;
70 } else {
71 return -FDT_ERR_BADMAGIC;
72 }
73
74 return 0;
75}
76
77const void *fdt_offset_ptr(const void *fdt, int offset, int len)
78{
79 const char *p;
80
81 if (fdt_version(fdt) >= 0x11)
82 if (((offset + len) < offset)
83 || ((offset + len) > fdt_size_dt_struct(fdt)))
84 return NULL;
85
86 p = _fdt_offset_ptr(fdt, offset);
87
88 if (p + len < p)
89 return NULL;
90 return p;
91}
92
93uint32_t fdt_next_tag(const void *fdt, int offset, int *nextoffset)
94{
95 const uint32_t *tagp, *lenp;
96 uint32_t tag;
97 const char *p;
98
99 if (offset % FDT_TAGSIZE)
100 return -1;
101
102 tagp = fdt_offset_ptr(fdt, offset, FDT_TAGSIZE);
103 if (! tagp)
104 return FDT_END; /* premature end */
105 tag = fdt32_to_cpu(*tagp);
106 offset += FDT_TAGSIZE;
107
108 switch (tag) {
109 case FDT_BEGIN_NODE:
110 /* skip name */
111 do {
112 p = fdt_offset_ptr(fdt, offset++, 1);
113 } while (p && (*p != '\0'));
114 if (! p)
115 return FDT_END;
116 break;
117 case FDT_PROP:
118 lenp = fdt_offset_ptr(fdt, offset, sizeof(*lenp));
119 if (! lenp)
120 return FDT_END;
121 /* skip name offset, length and value */
122 offset += 2*FDT_TAGSIZE + fdt32_to_cpu(*lenp);
123 break;
124 }
125
126 if (nextoffset)
127 *nextoffset = FDT_TAGALIGN(offset);
128
129 return tag;
130}
131
132int _fdt_check_node_offset(const void *fdt, int offset)
133{
134 if ((offset < 0) || (offset % FDT_TAGSIZE)
135 || (fdt_next_tag(fdt, offset, &offset) != FDT_BEGIN_NODE))
136 return -FDT_ERR_BADOFFSET;
137
138 return offset;
139}
140
141int fdt_next_node(const void *fdt, int offset, int *depth)
142{
143 int nextoffset = 0;
144 uint32_t tag;
145
146 if (offset >= 0)
147 if ((nextoffset = _fdt_check_node_offset(fdt, offset)) < 0)
148 return nextoffset;
149
150 do {
151 offset = nextoffset;
152 tag = fdt_next_tag(fdt, offset, &nextoffset);
153
154 switch (tag) {
155 case FDT_PROP:
156 case FDT_NOP:
157 break;
158
159 case FDT_BEGIN_NODE:
160 if (depth)
161 (*depth)++;
162 break;
163
164 case FDT_END_NODE:
165 if (depth)
166 (*depth)--;
167 break;
168
169 case FDT_END:
170 return -FDT_ERR_NOTFOUND;
171
172 default:
173 return -FDT_ERR_BADSTRUCTURE;
174 }
175 } while (tag != FDT_BEGIN_NODE);
176
177 return offset;
178}
179
180const char *_fdt_find_string(const char *strtab, int tabsize, const char *s)
181{
182 int len = strlen(s) + 1;
183 const char *last = strtab + tabsize - len;
184 const char *p;
185
186 for (p = strtab; p <= last; p++)
187 if (memcmp(p, s, len) == 0)
188 return p;
189 return NULL;
190}
191
192int fdt_move(const void *fdt, void *buf, int bufsize)
193{
194 FDT_CHECK_HEADER(fdt);
195
196 if (fdt_totalsize(fdt) > bufsize)
197 return -FDT_ERR_NOSPACE;
198
199 memmove(buf, fdt, fdt_totalsize(fdt));
200 return 0;
201}
diff --git a/scripts/dtc/libfdt/fdt.h b/scripts/dtc/libfdt/fdt.h
new file mode 100644
index 000000000000..48ccfd910000
--- /dev/null
+++ b/scripts/dtc/libfdt/fdt.h
@@ -0,0 +1,60 @@
1#ifndef _FDT_H
2#define _FDT_H
3
4#ifndef __ASSEMBLY__
5
6struct fdt_header {
7 uint32_t magic; /* magic word FDT_MAGIC */
8 uint32_t totalsize; /* total size of DT block */
9 uint32_t off_dt_struct; /* offset to structure */
10 uint32_t off_dt_strings; /* offset to strings */
11 uint32_t off_mem_rsvmap; /* offset to memory reserve map */
12 uint32_t version; /* format version */
13 uint32_t last_comp_version; /* last compatible version */
14
15 /* version 2 fields below */
16 uint32_t boot_cpuid_phys; /* Which physical CPU id we're
17 booting on */
18 /* version 3 fields below */
19 uint32_t size_dt_strings; /* size of the strings block */
20
21 /* version 17 fields below */
22 uint32_t size_dt_struct; /* size of the structure block */
23};
24
25struct fdt_reserve_entry {
26 uint64_t address;
27 uint64_t size;
28};
29
30struct fdt_node_header {
31 uint32_t tag;
32 char name[0];
33};
34
35struct fdt_property {
36 uint32_t tag;
37 uint32_t len;
38 uint32_t nameoff;
39 char data[0];
40};
41
42#endif /* !__ASSEMBLY */
43
44#define FDT_MAGIC 0xd00dfeed /* 4: version, 4: total size */
45#define FDT_TAGSIZE sizeof(uint32_t)
46
47#define FDT_BEGIN_NODE 0x1 /* Start node: full name */
48#define FDT_END_NODE 0x2 /* End node */
49#define FDT_PROP 0x3 /* Property: name off,
50 size, content */
51#define FDT_NOP 0x4 /* nop */
52#define FDT_END 0x9
53
54#define FDT_V1_SIZE (7*sizeof(uint32_t))
55#define FDT_V2_SIZE (FDT_V1_SIZE + sizeof(uint32_t))
56#define FDT_V3_SIZE (FDT_V2_SIZE + sizeof(uint32_t))
57#define FDT_V16_SIZE FDT_V3_SIZE
58#define FDT_V17_SIZE (FDT_V16_SIZE + sizeof(uint32_t))
59
60#endif /* _FDT_H */
diff --git a/scripts/dtc/libfdt/fdt_ro.c b/scripts/dtc/libfdt/fdt_ro.c
new file mode 100644
index 000000000000..fbbba44fcd0d
--- /dev/null
+++ b/scripts/dtc/libfdt/fdt_ro.c
@@ -0,0 +1,469 @@
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
58static int _fdt_nodename_eq(const void *fdt, int offset,
59 const char *s, int len)
60{
61 const char *p = fdt_offset_ptr(fdt, offset + FDT_TAGSIZE, len+1);
62
63 if (! p)
64 /* short match */
65 return 0;
66
67 if (memcmp(p, s, len) != 0)
68 return 0;
69
70 if (p[len] == '\0')
71 return 1;
72 else if (!memchr(s, '@', len) && (p[len] == '@'))
73 return 1;
74 else
75 return 0;
76}
77
78const char *fdt_string(const void *fdt, int stroffset)
79{
80 return (const char *)fdt + fdt_off_dt_strings(fdt) + stroffset;
81}
82
83int fdt_get_mem_rsv(const void *fdt, int n, uint64_t *address, uint64_t *size)
84{
85 FDT_CHECK_HEADER(fdt);
86 *address = fdt64_to_cpu(_fdt_mem_rsv(fdt, n)->address);
87 *size = fdt64_to_cpu(_fdt_mem_rsv(fdt, n)->size);
88 return 0;
89}
90
91int fdt_num_mem_rsv(const void *fdt)
92{
93 int i = 0;
94
95 while (fdt64_to_cpu(_fdt_mem_rsv(fdt, i)->size) != 0)
96 i++;
97 return i;
98}
99
100int fdt_subnode_offset_namelen(const void *fdt, int offset,
101 const char *name, int namelen)
102{
103 int depth;
104
105 FDT_CHECK_HEADER(fdt);
106
107 for (depth = 0, offset = fdt_next_node(fdt, offset, &depth);
108 (offset >= 0) && (depth > 0);
109 offset = fdt_next_node(fdt, offset, &depth)) {
110 if (depth < 0)
111 return -FDT_ERR_NOTFOUND;
112 else if ((depth == 1)
113 && _fdt_nodename_eq(fdt, offset, name, namelen))
114 return offset;
115 }
116
117 if (offset < 0)
118 return offset; /* error */
119 else
120 return -FDT_ERR_NOTFOUND;
121}
122
123int fdt_subnode_offset(const void *fdt, int parentoffset,
124 const char *name)
125{
126 return fdt_subnode_offset_namelen(fdt, parentoffset, name, strlen(name));
127}
128
129int fdt_path_offset(const void *fdt, const char *path)
130{
131 const char *end = path + strlen(path);
132 const char *p = path;
133 int offset = 0;
134
135 FDT_CHECK_HEADER(fdt);
136
137 if (*path != '/')
138 return -FDT_ERR_BADPATH;
139
140 while (*p) {
141 const char *q;
142
143 while (*p == '/')
144 p++;
145 if (! *p)
146 return offset;
147 q = strchr(p, '/');
148 if (! q)
149 q = end;
150
151 offset = fdt_subnode_offset_namelen(fdt, offset, p, q-p);
152 if (offset < 0)
153 return offset;
154
155 p = q;
156 }
157
158 return offset;
159}
160
161const char *fdt_get_name(const void *fdt, int nodeoffset, int *len)
162{
163 const struct fdt_node_header *nh = _fdt_offset_ptr(fdt, nodeoffset);
164 int err;
165
166 if (((err = fdt_check_header(fdt)) != 0)
167 || ((err = _fdt_check_node_offset(fdt, nodeoffset)) < 0))
168 goto fail;
169
170 if (len)
171 *len = strlen(nh->name);
172
173 return nh->name;
174
175 fail:
176 if (len)
177 *len = err;
178 return NULL;
179}
180
181const struct fdt_property *fdt_get_property(const void *fdt,
182 int nodeoffset,
183 const char *name, int *lenp)
184{
185 uint32_t tag;
186 const struct fdt_property *prop;
187 int namestroff;
188 int offset, nextoffset;
189 int err;
190
191 if (((err = fdt_check_header(fdt)) != 0)
192 || ((err = _fdt_check_node_offset(fdt, nodeoffset)) < 0))
193 goto fail;
194
195 nextoffset = err;
196 do {
197 offset = nextoffset;
198
199 tag = fdt_next_tag(fdt, offset, &nextoffset);
200 switch (tag) {
201 case FDT_END:
202 err = -FDT_ERR_TRUNCATED;
203 goto fail;
204
205 case FDT_BEGIN_NODE:
206 case FDT_END_NODE:
207 case FDT_NOP:
208 break;
209
210 case FDT_PROP:
211 err = -FDT_ERR_BADSTRUCTURE;
212 prop = fdt_offset_ptr(fdt, offset, sizeof(*prop));
213 if (! prop)
214 goto fail;
215 namestroff = fdt32_to_cpu(prop->nameoff);
216 if (strcmp(fdt_string(fdt, namestroff), name) == 0) {
217 /* Found it! */
218 int len = fdt32_to_cpu(prop->len);
219 prop = fdt_offset_ptr(fdt, offset,
220 sizeof(*prop)+len);
221 if (! prop)
222 goto fail;
223
224 if (lenp)
225 *lenp = len;
226
227 return prop;
228 }
229 break;
230
231 default:
232 err = -FDT_ERR_BADSTRUCTURE;
233 goto fail;
234 }
235 } while ((tag != FDT_BEGIN_NODE) && (tag != FDT_END_NODE));
236
237 err = -FDT_ERR_NOTFOUND;
238 fail:
239 if (lenp)
240 *lenp = err;
241 return NULL;
242}
243
244const void *fdt_getprop(const void *fdt, int nodeoffset,
245 const char *name, int *lenp)
246{
247 const struct fdt_property *prop;
248
249 prop = fdt_get_property(fdt, nodeoffset, name, lenp);
250 if (! prop)
251 return NULL;
252
253 return prop->data;
254}
255
256uint32_t fdt_get_phandle(const void *fdt, int nodeoffset)
257{
258 const uint32_t *php;
259 int len;
260
261 php = fdt_getprop(fdt, nodeoffset, "linux,phandle", &len);
262 if (!php || (len != sizeof(*php)))
263 return 0;
264
265 return fdt32_to_cpu(*php);
266}
267
268int fdt_get_path(const void *fdt, int nodeoffset, char *buf, int buflen)
269{
270 int pdepth = 0, p = 0;
271 int offset, depth, namelen;
272 const char *name;
273
274 FDT_CHECK_HEADER(fdt);
275
276 if (buflen < 2)
277 return -FDT_ERR_NOSPACE;
278
279 for (offset = 0, depth = 0;
280 (offset >= 0) && (offset <= nodeoffset);
281 offset = fdt_next_node(fdt, offset, &depth)) {
282 if (pdepth < depth)
283 continue; /* overflowed buffer */
284
285 while (pdepth > depth) {
286 do {
287 p--;
288 } while (buf[p-1] != '/');
289 pdepth--;
290 }
291
292 name = fdt_get_name(fdt, offset, &namelen);
293 if (!name)
294 return namelen;
295 if ((p + namelen + 1) <= buflen) {
296 memcpy(buf + p, name, namelen);
297 p += namelen;
298 buf[p++] = '/';
299 pdepth++;
300 }
301
302 if (offset == nodeoffset) {
303 if (pdepth < (depth + 1))
304 return -FDT_ERR_NOSPACE;
305
306 if (p > 1) /* special case so that root path is "/", not "" */
307 p--;
308 buf[p] = '\0';
309 return p;
310 }
311 }
312
313 if ((offset == -FDT_ERR_NOTFOUND) || (offset >= 0))
314 return -FDT_ERR_BADOFFSET;
315 else if (offset == -FDT_ERR_BADOFFSET)
316 return -FDT_ERR_BADSTRUCTURE;
317
318 return offset; /* error from fdt_next_node() */
319}
320
321int fdt_supernode_atdepth_offset(const void *fdt, int nodeoffset,
322 int supernodedepth, int *nodedepth)
323{
324 int offset, depth;
325 int supernodeoffset = -FDT_ERR_INTERNAL;
326
327 FDT_CHECK_HEADER(fdt);
328
329 if (supernodedepth < 0)
330 return -FDT_ERR_NOTFOUND;
331
332 for (offset = 0, depth = 0;
333 (offset >= 0) && (offset <= nodeoffset);
334 offset = fdt_next_node(fdt, offset, &depth)) {
335 if (depth == supernodedepth)
336 supernodeoffset = offset;
337
338 if (offset == nodeoffset) {
339 if (nodedepth)
340 *nodedepth = depth;
341
342 if (supernodedepth > depth)
343 return -FDT_ERR_NOTFOUND;
344 else
345 return supernodeoffset;
346 }
347 }
348
349 if ((offset == -FDT_ERR_NOTFOUND) || (offset >= 0))
350 return -FDT_ERR_BADOFFSET;
351 else if (offset == -FDT_ERR_BADOFFSET)
352 return -FDT_ERR_BADSTRUCTURE;
353
354 return offset; /* error from fdt_next_node() */
355}
356
357int fdt_node_depth(const void *fdt, int nodeoffset)
358{
359 int nodedepth;
360 int err;
361
362 err = fdt_supernode_atdepth_offset(fdt, nodeoffset, 0, &nodedepth);
363 if (err)
364 return (err < 0) ? err : -FDT_ERR_INTERNAL;
365 return nodedepth;
366}
367
368int fdt_parent_offset(const void *fdt, int nodeoffset)
369{
370 int nodedepth = fdt_node_depth(fdt, nodeoffset);
371
372 if (nodedepth < 0)
373 return nodedepth;
374 return fdt_supernode_atdepth_offset(fdt, nodeoffset,
375 nodedepth - 1, NULL);
376}
377
378int fdt_node_offset_by_prop_value(const void *fdt, int startoffset,
379 const char *propname,
380 const void *propval, int proplen)
381{
382 int offset;
383 const void *val;
384 int len;
385
386 FDT_CHECK_HEADER(fdt);
387
388 /* FIXME: The algorithm here is pretty horrible: we scan each
389 * property of a node in fdt_getprop(), then if that didn't
390 * find what we want, we scan over them again making our way
391 * to the next node. Still it's the easiest to implement
392 * approach; performance can come later. */
393 for (offset = fdt_next_node(fdt, startoffset, NULL);
394 offset >= 0;
395 offset = fdt_next_node(fdt, offset, NULL)) {
396 val = fdt_getprop(fdt, offset, propname, &len);
397 if (val && (len == proplen)
398 && (memcmp(val, propval, len) == 0))
399 return offset;
400 }
401
402 return offset; /* error from fdt_next_node() */
403}
404
405int fdt_node_offset_by_phandle(const void *fdt, uint32_t phandle)
406{
407 if ((phandle == 0) || (phandle == -1))
408 return -FDT_ERR_BADPHANDLE;
409 phandle = cpu_to_fdt32(phandle);
410 return fdt_node_offset_by_prop_value(fdt, -1, "linux,phandle",
411 &phandle, sizeof(phandle));
412}
413
414int _stringlist_contains(const char *strlist, int listlen, const char *str)
415{
416 int len = strlen(str);
417 const char *p;
418
419 while (listlen >= len) {
420 if (memcmp(str, strlist, len+1) == 0)
421 return 1;
422 p = memchr(strlist, '\0', listlen);
423 if (!p)
424 return 0; /* malformed strlist.. */
425 listlen -= (p-strlist) + 1;
426 strlist = p + 1;
427 }
428 return 0;
429}
430
431int fdt_node_check_compatible(const void *fdt, int nodeoffset,
432 const char *compatible)
433{
434 const void *prop;
435 int len;
436
437 prop = fdt_getprop(fdt, nodeoffset, "compatible", &len);
438 if (!prop)
439 return len;
440 if (_stringlist_contains(prop, len, compatible))
441 return 0;
442 else
443 return 1;
444}
445
446int fdt_node_offset_by_compatible(const void *fdt, int startoffset,
447 const char *compatible)
448{
449 int offset, err;
450
451 FDT_CHECK_HEADER(fdt);
452
453 /* FIXME: The algorithm here is pretty horrible: we scan each
454 * property of a node in fdt_node_check_compatible(), then if
455 * that didn't find what we want, we scan over them again
456 * making our way to the next node. Still it's the easiest to
457 * implement approach; performance can come later. */
458 for (offset = fdt_next_node(fdt, startoffset, NULL);
459 offset >= 0;
460 offset = fdt_next_node(fdt, offset, NULL)) {
461 err = fdt_node_check_compatible(fdt, offset, compatible);
462 if ((err < 0) && (err != -FDT_ERR_NOTFOUND))
463 return err;
464 else if (err == 0)
465 return offset;
466 }
467
468 return offset; /* error from fdt_next_node() */
469}
diff --git a/scripts/dtc/libfdt/fdt_rw.c b/scripts/dtc/libfdt/fdt_rw.c
new file mode 100644
index 000000000000..8e7ec4cb7bcd
--- /dev/null
+++ b/scripts/dtc/libfdt/fdt_rw.c
@@ -0,0 +1,463 @@
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
58static int _fdt_blocks_misordered(const void *fdt,
59 int mem_rsv_size, int struct_size)
60{
61 return (fdt_off_mem_rsvmap(fdt) < FDT_ALIGN(sizeof(struct fdt_header), 8))
62 || (fdt_off_dt_struct(fdt) <
63 (fdt_off_mem_rsvmap(fdt) + mem_rsv_size))
64 || (fdt_off_dt_strings(fdt) <
65 (fdt_off_dt_struct(fdt) + struct_size))
66 || (fdt_totalsize(fdt) <
67 (fdt_off_dt_strings(fdt) + fdt_size_dt_strings(fdt)));
68}
69
70static int _fdt_rw_check_header(void *fdt)
71{
72 FDT_CHECK_HEADER(fdt);
73
74 if (fdt_version(fdt) < 17)
75 return -FDT_ERR_BADVERSION;
76 if (_fdt_blocks_misordered(fdt, sizeof(struct fdt_reserve_entry),
77 fdt_size_dt_struct(fdt)))
78 return -FDT_ERR_BADLAYOUT;
79 if (fdt_version(fdt) > 17)
80 fdt_set_version(fdt, 17);
81
82 return 0;
83}
84
85#define FDT_RW_CHECK_HEADER(fdt) \
86 { \
87 int err; \
88 if ((err = _fdt_rw_check_header(fdt)) != 0) \
89 return err; \
90 }
91
92static inline int _fdt_data_size(void *fdt)
93{
94 return fdt_off_dt_strings(fdt) + fdt_size_dt_strings(fdt);
95}
96
97static int _fdt_splice(void *fdt, void *splicepoint, int oldlen, int newlen)
98{
99 char *p = splicepoint;
100 char *end = (char *)fdt + _fdt_data_size(fdt);
101
102 if (((p + oldlen) < p) || ((p + oldlen) > end))
103 return -FDT_ERR_BADOFFSET;
104 if ((end - oldlen + newlen) > ((char *)fdt + fdt_totalsize(fdt)))
105 return -FDT_ERR_NOSPACE;
106 memmove(p + newlen, p + oldlen, end - p - oldlen);
107 return 0;
108}
109
110static int _fdt_splice_mem_rsv(void *fdt, struct fdt_reserve_entry *p,
111 int oldn, int newn)
112{
113 int delta = (newn - oldn) * sizeof(*p);
114 int err;
115 err = _fdt_splice(fdt, p, oldn * sizeof(*p), newn * sizeof(*p));
116 if (err)
117 return err;
118 fdt_set_off_dt_struct(fdt, fdt_off_dt_struct(fdt) + delta);
119 fdt_set_off_dt_strings(fdt, fdt_off_dt_strings(fdt) + delta);
120 return 0;
121}
122
123static int _fdt_splice_struct(void *fdt, void *p,
124 int oldlen, int newlen)
125{
126 int delta = newlen - oldlen;
127 int err;
128
129 if ((err = _fdt_splice(fdt, p, oldlen, newlen)))
130 return err;
131
132 fdt_set_size_dt_struct(fdt, fdt_size_dt_struct(fdt) + delta);
133 fdt_set_off_dt_strings(fdt, fdt_off_dt_strings(fdt) + delta);
134 return 0;
135}
136
137static int _fdt_splice_string(void *fdt, int newlen)
138{
139 void *p = (char *)fdt
140 + fdt_off_dt_strings(fdt) + fdt_size_dt_strings(fdt);
141 int err;
142
143 if ((err = _fdt_splice(fdt, p, 0, newlen)))
144 return err;
145
146 fdt_set_size_dt_strings(fdt, fdt_size_dt_strings(fdt) + newlen);
147 return 0;
148}
149
150static int _fdt_find_add_string(void *fdt, const char *s)
151{
152 char *strtab = (char *)fdt + fdt_off_dt_strings(fdt);
153 const char *p;
154 char *new;
155 int len = strlen(s) + 1;
156 int err;
157
158 p = _fdt_find_string(strtab, fdt_size_dt_strings(fdt), s);
159 if (p)
160 /* found it */
161 return (p - strtab);
162
163 new = strtab + fdt_size_dt_strings(fdt);
164 err = _fdt_splice_string(fdt, len);
165 if (err)
166 return err;
167
168 memcpy(new, s, len);
169 return (new - strtab);
170}
171
172int fdt_add_mem_rsv(void *fdt, uint64_t address, uint64_t size)
173{
174 struct fdt_reserve_entry *re;
175 int err;
176
177 FDT_RW_CHECK_HEADER(fdt);
178
179 re = _fdt_mem_rsv_w(fdt, fdt_num_mem_rsv(fdt));
180 err = _fdt_splice_mem_rsv(fdt, re, 0, 1);
181 if (err)
182 return err;
183
184 re->address = cpu_to_fdt64(address);
185 re->size = cpu_to_fdt64(size);
186 return 0;
187}
188
189int fdt_del_mem_rsv(void *fdt, int n)
190{
191 struct fdt_reserve_entry *re = _fdt_mem_rsv_w(fdt, n);
192 int err;
193
194 FDT_RW_CHECK_HEADER(fdt);
195
196 if (n >= fdt_num_mem_rsv(fdt))
197 return -FDT_ERR_NOTFOUND;
198
199 err = _fdt_splice_mem_rsv(fdt, re, 1, 0);
200 if (err)
201 return err;
202 return 0;
203}
204
205static int _fdt_resize_property(void *fdt, int nodeoffset, const char *name,
206 int len, struct fdt_property **prop)
207{
208 int oldlen;
209 int err;
210
211 *prop = fdt_get_property_w(fdt, nodeoffset, name, &oldlen);
212 if (! (*prop))
213 return oldlen;
214
215 if ((err = _fdt_splice_struct(fdt, (*prop)->data, FDT_TAGALIGN(oldlen),
216 FDT_TAGALIGN(len))))
217 return err;
218
219 (*prop)->len = cpu_to_fdt32(len);
220 return 0;
221}
222
223static int _fdt_add_property(void *fdt, int nodeoffset, const char *name,
224 int len, struct fdt_property **prop)
225{
226 int proplen;
227 int nextoffset;
228 int namestroff;
229 int err;
230
231 if ((nextoffset = _fdt_check_node_offset(fdt, nodeoffset)) < 0)
232 return nextoffset;
233
234 namestroff = _fdt_find_add_string(fdt, name);
235 if (namestroff < 0)
236 return namestroff;
237
238 *prop = _fdt_offset_ptr_w(fdt, nextoffset);
239 proplen = sizeof(**prop) + FDT_TAGALIGN(len);
240
241 err = _fdt_splice_struct(fdt, *prop, 0, proplen);
242 if (err)
243 return err;
244
245 (*prop)->tag = cpu_to_fdt32(FDT_PROP);
246 (*prop)->nameoff = cpu_to_fdt32(namestroff);
247 (*prop)->len = cpu_to_fdt32(len);
248 return 0;
249}
250
251int fdt_set_name(void *fdt, int nodeoffset, const char *name)
252{
253 char *namep;
254 int oldlen, newlen;
255 int err;
256
257 FDT_RW_CHECK_HEADER(fdt);
258
259 namep = (char *)(uintptr_t)fdt_get_name(fdt, nodeoffset, &oldlen);
260 if (!namep)
261 return oldlen;
262
263 newlen = strlen(name);
264
265 err = _fdt_splice_struct(fdt, namep, FDT_TAGALIGN(oldlen+1),
266 FDT_TAGALIGN(newlen+1));
267 if (err)
268 return err;
269
270 memcpy(namep, name, newlen+1);
271 return 0;
272}
273
274int fdt_setprop(void *fdt, int nodeoffset, const char *name,
275 const void *val, int len)
276{
277 struct fdt_property *prop;
278 int err;
279
280 FDT_RW_CHECK_HEADER(fdt);
281
282 err = _fdt_resize_property(fdt, nodeoffset, name, len, &prop);
283 if (err == -FDT_ERR_NOTFOUND)
284 err = _fdt_add_property(fdt, nodeoffset, name, len, &prop);
285 if (err)
286 return err;
287
288 memcpy(prop->data, val, len);
289 return 0;
290}
291
292int fdt_delprop(void *fdt, int nodeoffset, const char *name)
293{
294 struct fdt_property *prop;
295 int len, proplen;
296
297 FDT_RW_CHECK_HEADER(fdt);
298
299 prop = fdt_get_property_w(fdt, nodeoffset, name, &len);
300 if (! prop)
301 return len;
302
303 proplen = sizeof(*prop) + FDT_TAGALIGN(len);
304 return _fdt_splice_struct(fdt, prop, proplen, 0);
305}
306
307int fdt_add_subnode_namelen(void *fdt, int parentoffset,
308 const char *name, int namelen)
309{
310 struct fdt_node_header *nh;
311 int offset, nextoffset;
312 int nodelen;
313 int err;
314 uint32_t tag;
315 uint32_t *endtag;
316
317 FDT_RW_CHECK_HEADER(fdt);
318
319 offset = fdt_subnode_offset_namelen(fdt, parentoffset, name, namelen);
320 if (offset >= 0)
321 return -FDT_ERR_EXISTS;
322 else if (offset != -FDT_ERR_NOTFOUND)
323 return offset;
324
325 /* Try to place the new node after the parent's properties */
326 fdt_next_tag(fdt, parentoffset, &nextoffset); /* skip the BEGIN_NODE */
327 do {
328 offset = nextoffset;
329 tag = fdt_next_tag(fdt, offset, &nextoffset);
330 } while ((tag == FDT_PROP) || (tag == FDT_NOP));
331
332 nh = _fdt_offset_ptr_w(fdt, offset);
333 nodelen = sizeof(*nh) + FDT_TAGALIGN(namelen+1) + FDT_TAGSIZE;
334
335 err = _fdt_splice_struct(fdt, nh, 0, nodelen);
336 if (err)
337 return err;
338
339 nh->tag = cpu_to_fdt32(FDT_BEGIN_NODE);
340 memset(nh->name, 0, FDT_TAGALIGN(namelen+1));
341 memcpy(nh->name, name, namelen);
342 endtag = (uint32_t *)((char *)nh + nodelen - FDT_TAGSIZE);
343 *endtag = cpu_to_fdt32(FDT_END_NODE);
344
345 return offset;
346}
347
348int fdt_add_subnode(void *fdt, int parentoffset, const char *name)
349{
350 return fdt_add_subnode_namelen(fdt, parentoffset, name, strlen(name));
351}
352
353int fdt_del_node(void *fdt, int nodeoffset)
354{
355 int endoffset;
356
357 FDT_RW_CHECK_HEADER(fdt);
358
359 endoffset = _fdt_node_end_offset(fdt, nodeoffset);
360 if (endoffset < 0)
361 return endoffset;
362
363 return _fdt_splice_struct(fdt, _fdt_offset_ptr_w(fdt, nodeoffset),
364 endoffset - nodeoffset, 0);
365}
366
367static void _fdt_packblocks(const char *old, char *new,
368 int mem_rsv_size, int struct_size)
369{
370 int mem_rsv_off, struct_off, strings_off;
371
372 mem_rsv_off = FDT_ALIGN(sizeof(struct fdt_header), 8);
373 struct_off = mem_rsv_off + mem_rsv_size;
374 strings_off = struct_off + struct_size;
375
376 memmove(new + mem_rsv_off, old + fdt_off_mem_rsvmap(old), mem_rsv_size);
377 fdt_set_off_mem_rsvmap(new, mem_rsv_off);
378
379 memmove(new + struct_off, old + fdt_off_dt_struct(old), struct_size);
380 fdt_set_off_dt_struct(new, struct_off);
381 fdt_set_size_dt_struct(new, struct_size);
382
383 memmove(new + strings_off, old + fdt_off_dt_strings(old),
384 fdt_size_dt_strings(old));
385 fdt_set_off_dt_strings(new, strings_off);
386 fdt_set_size_dt_strings(new, fdt_size_dt_strings(old));
387}
388
389int fdt_open_into(const void *fdt, void *buf, int bufsize)
390{
391 int err;
392 int mem_rsv_size, struct_size;
393 int newsize;
394 const char *fdtstart = fdt;
395 const char *fdtend = fdtstart + fdt_totalsize(fdt);
396 char *tmp;
397
398 FDT_CHECK_HEADER(fdt);
399
400 mem_rsv_size = (fdt_num_mem_rsv(fdt)+1)
401 * sizeof(struct fdt_reserve_entry);
402
403 if (fdt_version(fdt) >= 17) {
404 struct_size = fdt_size_dt_struct(fdt);
405 } else {
406 struct_size = 0;
407 while (fdt_next_tag(fdt, struct_size, &struct_size) != FDT_END)
408 ;
409 }
410
411 if (!_fdt_blocks_misordered(fdt, mem_rsv_size, struct_size)) {
412 /* no further work necessary */
413 err = fdt_move(fdt, buf, bufsize);
414 if (err)
415 return err;
416 fdt_set_version(buf, 17);
417 fdt_set_size_dt_struct(buf, struct_size);
418 fdt_set_totalsize(buf, bufsize);
419 return 0;
420 }
421
422 /* Need to reorder */
423 newsize = FDT_ALIGN(sizeof(struct fdt_header), 8) + mem_rsv_size
424 + struct_size + fdt_size_dt_strings(fdt);
425
426 if (bufsize < newsize)
427 return -FDT_ERR_NOSPACE;
428
429 /* First attempt to build converted tree at beginning of buffer */
430 tmp = buf;
431 /* But if that overlaps with the old tree... */
432 if (((tmp + newsize) > fdtstart) && (tmp < fdtend)) {
433 /* Try right after the old tree instead */
434 tmp = (char *)(uintptr_t)fdtend;
435 if ((tmp + newsize) > ((char *)buf + bufsize))
436 return -FDT_ERR_NOSPACE;
437 }
438
439 _fdt_packblocks(fdt, tmp, mem_rsv_size, struct_size);
440 memmove(buf, tmp, newsize);
441
442 fdt_set_magic(buf, FDT_MAGIC);
443 fdt_set_totalsize(buf, bufsize);
444 fdt_set_version(buf, 17);
445 fdt_set_last_comp_version(buf, 16);
446 fdt_set_boot_cpuid_phys(buf, fdt_boot_cpuid_phys(fdt));
447
448 return 0;
449}
450
451int fdt_pack(void *fdt)
452{
453 int mem_rsv_size;
454
455 FDT_RW_CHECK_HEADER(fdt);
456
457 mem_rsv_size = (fdt_num_mem_rsv(fdt)+1)
458 * sizeof(struct fdt_reserve_entry);
459 _fdt_packblocks(fdt, fdt, mem_rsv_size, fdt_size_dt_struct(fdt));
460 fdt_set_totalsize(fdt, _fdt_data_size(fdt));
461
462 return 0;
463}
diff --git a/scripts/dtc/libfdt/fdt_strerror.c b/scripts/dtc/libfdt/fdt_strerror.c
new file mode 100644
index 000000000000..e6c3ceee8c58
--- /dev/null
+++ b/scripts/dtc/libfdt/fdt_strerror.c
@@ -0,0 +1,96 @@
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
58struct fdt_errtabent {
59 const char *str;
60};
61
62#define FDT_ERRTABENT(val) \
63 [(val)] = { .str = #val, }
64
65static struct fdt_errtabent fdt_errtable[] = {
66 FDT_ERRTABENT(FDT_ERR_NOTFOUND),
67 FDT_ERRTABENT(FDT_ERR_EXISTS),
68 FDT_ERRTABENT(FDT_ERR_NOSPACE),
69
70 FDT_ERRTABENT(FDT_ERR_BADOFFSET),
71 FDT_ERRTABENT(FDT_ERR_BADPATH),
72 FDT_ERRTABENT(FDT_ERR_BADSTATE),
73
74 FDT_ERRTABENT(FDT_ERR_TRUNCATED),
75 FDT_ERRTABENT(FDT_ERR_BADMAGIC),
76 FDT_ERRTABENT(FDT_ERR_BADVERSION),
77 FDT_ERRTABENT(FDT_ERR_BADSTRUCTURE),
78 FDT_ERRTABENT(FDT_ERR_BADLAYOUT),
79};
80#define FDT_ERRTABSIZE (sizeof(fdt_errtable) / sizeof(fdt_errtable[0]))
81
82const char *fdt_strerror(int errval)
83{
84 if (errval > 0)
85 return "<valid offset/length>";
86 else if (errval == 0)
87 return "<no error>";
88 else if (errval > -FDT_ERRTABSIZE) {
89 const char *s = fdt_errtable[-errval].str;
90
91 if (s)
92 return s;
93 }
94
95 return "<unknown error>";
96}
diff --git a/scripts/dtc/libfdt/fdt_sw.c b/scripts/dtc/libfdt/fdt_sw.c
new file mode 100644
index 000000000000..698329e0ccaf
--- /dev/null
+++ b/scripts/dtc/libfdt/fdt_sw.c
@@ -0,0 +1,257 @@
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
58static int _fdt_sw_check_header(void *fdt)
59{
60 if (fdt_magic(fdt) != FDT_SW_MAGIC)
61 return -FDT_ERR_BADMAGIC;
62 /* FIXME: should check more details about the header state */
63 return 0;
64}
65
66#define FDT_SW_CHECK_HEADER(fdt) \
67 { \
68 int err; \
69 if ((err = _fdt_sw_check_header(fdt)) != 0) \
70 return err; \
71 }
72
73static void *_fdt_grab_space(void *fdt, int len)
74{
75 int offset = fdt_size_dt_struct(fdt);
76 int spaceleft;
77
78 spaceleft = fdt_totalsize(fdt) - fdt_off_dt_struct(fdt)
79 - fdt_size_dt_strings(fdt);
80
81 if ((offset + len < offset) || (offset + len > spaceleft))
82 return NULL;
83
84 fdt_set_size_dt_struct(fdt, offset + len);
85 return fdt_offset_ptr_w(fdt, offset, len);
86}
87
88int fdt_create(void *buf, int bufsize)
89{
90 void *fdt = buf;
91
92 if (bufsize < sizeof(struct fdt_header))
93 return -FDT_ERR_NOSPACE;
94
95 memset(buf, 0, bufsize);
96
97 fdt_set_magic(fdt, FDT_SW_MAGIC);
98 fdt_set_version(fdt, FDT_LAST_SUPPORTED_VERSION);
99 fdt_set_last_comp_version(fdt, FDT_FIRST_SUPPORTED_VERSION);
100 fdt_set_totalsize(fdt, bufsize);
101
102 fdt_set_off_mem_rsvmap(fdt, FDT_ALIGN(sizeof(struct fdt_header),
103 sizeof(struct fdt_reserve_entry)));
104 fdt_set_off_dt_struct(fdt, fdt_off_mem_rsvmap(fdt));
105 fdt_set_off_dt_strings(fdt, bufsize);
106
107 return 0;
108}
109
110int fdt_add_reservemap_entry(void *fdt, uint64_t addr, uint64_t size)
111{
112 struct fdt_reserve_entry *re;
113 int offset;
114
115 FDT_SW_CHECK_HEADER(fdt);
116
117 if (fdt_size_dt_struct(fdt))
118 return -FDT_ERR_BADSTATE;
119
120 offset = fdt_off_dt_struct(fdt);
121 if ((offset + sizeof(*re)) > fdt_totalsize(fdt))
122 return -FDT_ERR_NOSPACE;
123
124 re = (struct fdt_reserve_entry *)((char *)fdt + offset);
125 re->address = cpu_to_fdt64(addr);
126 re->size = cpu_to_fdt64(size);
127
128 fdt_set_off_dt_struct(fdt, offset + sizeof(*re));
129
130 return 0;
131}
132
133int fdt_finish_reservemap(void *fdt)
134{
135 return fdt_add_reservemap_entry(fdt, 0, 0);
136}
137
138int fdt_begin_node(void *fdt, const char *name)
139{
140 struct fdt_node_header *nh;
141 int namelen = strlen(name) + 1;
142
143 FDT_SW_CHECK_HEADER(fdt);
144
145 nh = _fdt_grab_space(fdt, sizeof(*nh) + FDT_TAGALIGN(namelen));
146 if (! nh)
147 return -FDT_ERR_NOSPACE;
148
149 nh->tag = cpu_to_fdt32(FDT_BEGIN_NODE);
150 memcpy(nh->name, name, namelen);
151 return 0;
152}
153
154int fdt_end_node(void *fdt)
155{
156 uint32_t *en;
157
158 FDT_SW_CHECK_HEADER(fdt);
159
160 en = _fdt_grab_space(fdt, FDT_TAGSIZE);
161 if (! en)
162 return -FDT_ERR_NOSPACE;
163
164 *en = cpu_to_fdt32(FDT_END_NODE);
165 return 0;
166}
167
168static int _fdt_find_add_string(void *fdt, const char *s)
169{
170 char *strtab = (char *)fdt + fdt_totalsize(fdt);
171 const char *p;
172 int strtabsize = fdt_size_dt_strings(fdt);
173 int len = strlen(s) + 1;
174 int struct_top, offset;
175
176 p = _fdt_find_string(strtab - strtabsize, strtabsize, s);
177 if (p)
178 return p - strtab;
179
180 /* Add it */
181 offset = -strtabsize - len;
182 struct_top = fdt_off_dt_struct(fdt) + fdt_size_dt_struct(fdt);
183 if (fdt_totalsize(fdt) + offset < struct_top)
184 return 0; /* no more room :( */
185
186 memcpy(strtab + offset, s, len);
187 fdt_set_size_dt_strings(fdt, strtabsize + len);
188 return offset;
189}
190
191int fdt_property(void *fdt, const char *name, const void *val, int len)
192{
193 struct fdt_property *prop;
194 int nameoff;
195
196 FDT_SW_CHECK_HEADER(fdt);
197
198 nameoff = _fdt_find_add_string(fdt, name);
199 if (nameoff == 0)
200 return -FDT_ERR_NOSPACE;
201
202 prop = _fdt_grab_space(fdt, sizeof(*prop) + FDT_TAGALIGN(len));
203 if (! prop)
204 return -FDT_ERR_NOSPACE;
205
206 prop->tag = cpu_to_fdt32(FDT_PROP);
207 prop->nameoff = cpu_to_fdt32(nameoff);
208 prop->len = cpu_to_fdt32(len);
209 memcpy(prop->data, val, len);
210 return 0;
211}
212
213int fdt_finish(void *fdt)
214{
215 char *p = (char *)fdt;
216 uint32_t *end;
217 int oldstroffset, newstroffset;
218 uint32_t tag;
219 int offset, nextoffset;
220
221 FDT_SW_CHECK_HEADER(fdt);
222
223 /* Add terminator */
224 end = _fdt_grab_space(fdt, sizeof(*end));
225 if (! end)
226 return -FDT_ERR_NOSPACE;
227 *end = cpu_to_fdt32(FDT_END);
228
229 /* Relocate the string table */
230 oldstroffset = fdt_totalsize(fdt) - fdt_size_dt_strings(fdt);
231 newstroffset = fdt_off_dt_struct(fdt) + fdt_size_dt_struct(fdt);
232 memmove(p + newstroffset, p + oldstroffset, fdt_size_dt_strings(fdt));
233 fdt_set_off_dt_strings(fdt, newstroffset);
234
235 /* Walk the structure, correcting string offsets */
236 offset = 0;
237 while ((tag = fdt_next_tag(fdt, offset, &nextoffset)) != FDT_END) {
238 if (tag == FDT_PROP) {
239 struct fdt_property *prop =
240 fdt_offset_ptr_w(fdt, offset, sizeof(*prop));
241 int nameoff;
242
243 if (! prop)
244 return -FDT_ERR_BADSTRUCTURE;
245
246 nameoff = fdt32_to_cpu(prop->nameoff);
247 nameoff += fdt_size_dt_strings(fdt);
248 prop->nameoff = cpu_to_fdt32(nameoff);
249 }
250 offset = nextoffset;
251 }
252
253 /* Finally, adjust the header */
254 fdt_set_totalsize(fdt, newstroffset + fdt_size_dt_strings(fdt));
255 fdt_set_magic(fdt, FDT_MAGIC);
256 return 0;
257}
diff --git a/scripts/dtc/libfdt/fdt_wip.c b/scripts/dtc/libfdt/fdt_wip.c
new file mode 100644
index 000000000000..a4652c6e787e
--- /dev/null
+++ b/scripts/dtc/libfdt/fdt_wip.c
@@ -0,0 +1,145 @@
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
58int 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
75static 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
83int 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
97int _fdt_node_end_offset(void *fdt, int nodeoffset)
98{
99 int level = 0;
100 uint32_t tag;
101 int offset, nextoffset;
102
103 tag = fdt_next_tag(fdt, nodeoffset, &nextoffset);
104 if (tag != FDT_BEGIN_NODE)
105 return -FDT_ERR_BADOFFSET;
106 do {
107 offset = nextoffset;
108 tag = fdt_next_tag(fdt, offset, &nextoffset);
109
110 switch (tag) {
111 case FDT_END:
112 return offset;
113
114 case FDT_BEGIN_NODE:
115 level++;
116 break;
117
118 case FDT_END_NODE:
119 level--;
120 break;
121
122 case FDT_PROP:
123 case FDT_NOP:
124 break;
125
126 default:
127 return -FDT_ERR_BADSTRUCTURE;
128 }
129 } while (level >= 0);
130
131 return nextoffset;
132}
133
134int fdt_nop_node(void *fdt, int nodeoffset)
135{
136 int endoffset;
137
138 endoffset = _fdt_node_end_offset(fdt, nodeoffset);
139 if (endoffset < 0)
140 return endoffset;
141
142 _fdt_nop_region(fdt_offset_ptr_w(fdt, nodeoffset, 0),
143 endoffset - nodeoffset);
144 return 0;
145}
diff --git a/scripts/dtc/libfdt/libfdt.h b/scripts/dtc/libfdt/libfdt.h
new file mode 100644
index 000000000000..ce80e4fb41b2
--- /dev/null
+++ b/scripts/dtc/libfdt/libfdt.h
@@ -0,0 +1,1076 @@
1#ifndef _LIBFDT_H
2#define _LIBFDT_H
3/*
4 * libfdt - Flat Device Tree manipulation
5 * Copyright (C) 2006 David Gibson, IBM Corporation.
6 *
7 * libfdt is dual licensed: you can use it either under the terms of
8 * the GPL, or the BSD license, at your option.
9 *
10 * a) This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of the
13 * License, or (at your option) any later version.
14 *
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public
21 * License along with this library; if not, write to the Free
22 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
23 * MA 02110-1301 USA
24 *
25 * Alternatively,
26 *
27 * b) Redistribution and use in source and binary forms, with or
28 * without modification, are permitted provided that the following
29 * conditions are met:
30 *
31 * 1. Redistributions of source code must retain the above
32 * copyright notice, this list of conditions and the following
33 * disclaimer.
34 * 2. Redistributions in binary form must reproduce the above
35 * copyright notice, this list of conditions and the following
36 * disclaimer in the documentation and/or other materials
37 * provided with the distribution.
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
40 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
41 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
42 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
43 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
44 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
49 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
50 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
51 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
52 */
53
54#include <libfdt_env.h>
55#include <fdt.h>
56
57#define FDT_FIRST_SUPPORTED_VERSION 0x10
58#define FDT_LAST_SUPPORTED_VERSION 0x11
59
60/* Error codes: informative error codes */
61#define FDT_ERR_NOTFOUND 1
62 /* FDT_ERR_NOTFOUND: The requested node or property does not exist */
63#define FDT_ERR_EXISTS 2
64 /* FDT_ERR_EXISTS: Attemped to create a node or property which
65 * already exists */
66#define FDT_ERR_NOSPACE 3
67 /* FDT_ERR_NOSPACE: Operation needed to expand the device
68 * tree, but its buffer did not have sufficient space to
69 * contain the expanded tree. Use fdt_open_into() to move the
70 * device tree to a buffer with more space. */
71
72/* Error codes: codes for bad parameters */
73#define FDT_ERR_BADOFFSET 4
74 /* FDT_ERR_BADOFFSET: Function was passed a structure block
75 * offset which is out-of-bounds, or which points to an
76 * unsuitable part of the structure for the operation. */
77#define FDT_ERR_BADPATH 5
78 /* FDT_ERR_BADPATH: Function was passed a badly formatted path
79 * (e.g. missing a leading / for a function which requires an
80 * absolute path) */
81#define FDT_ERR_BADPHANDLE 6
82 /* FDT_ERR_BADPHANDLE: Function was passed an invalid phandle
83 * value. phandle values of 0 and -1 are not permitted. */
84#define FDT_ERR_BADSTATE 7
85 /* FDT_ERR_BADSTATE: Function was passed an incomplete device
86 * tree created by the sequential-write functions, which is
87 * not sufficiently complete for the requested operation. */
88
89/* Error codes: codes for bad device tree blobs */
90#define FDT_ERR_TRUNCATED 8
91 /* FDT_ERR_TRUNCATED: Structure block of the given device tree
92 * ends without an FDT_END tag. */
93#define FDT_ERR_BADMAGIC 9
94 /* FDT_ERR_BADMAGIC: Given "device tree" appears not to be a
95 * device tree at all - it is missing the flattened device
96 * tree magic number. */
97#define FDT_ERR_BADVERSION 10
98 /* FDT_ERR_BADVERSION: Given device tree has a version which
99 * can't be handled by the requested operation. For
100 * read-write functions, this may mean that fdt_open_into() is
101 * required to convert the tree to the expected version. */
102#define FDT_ERR_BADSTRUCTURE 11
103 /* FDT_ERR_BADSTRUCTURE: Given device tree has a corrupt
104 * structure block or other serious error (e.g. misnested
105 * nodes, or subnodes preceding properties). */
106#define FDT_ERR_BADLAYOUT 12
107 /* FDT_ERR_BADLAYOUT: For read-write functions, the given
108 * device tree has it's sub-blocks in an order that the
109 * function can't handle (memory reserve map, then structure,
110 * then strings). Use fdt_open_into() to reorganize the tree
111 * into a form suitable for the read-write operations. */
112
113/* "Can't happen" error indicating a bug in libfdt */
114#define FDT_ERR_INTERNAL 13
115 /* FDT_ERR_INTERNAL: libfdt has failed an internal assertion.
116 * Should never be returned, if it is, it indicates a bug in
117 * libfdt itself. */
118
119#define FDT_ERR_MAX 13
120
121/**********************************************************************/
122/* Low-level functions (you probably don't need these) */
123/**********************************************************************/
124
125const void *fdt_offset_ptr(const void *fdt, int offset, int checklen);
126static inline void *fdt_offset_ptr_w(void *fdt, int offset, int checklen)
127{
128 return (void *)(uintptr_t)fdt_offset_ptr(fdt, offset, checklen);
129}
130
131uint32_t fdt_next_tag(const void *fdt, int offset, int *nextoffset);
132
133/**********************************************************************/
134/* Traversal functions */
135/**********************************************************************/
136
137int fdt_next_node(const void *fdt, int offset, int *depth);
138
139/**********************************************************************/
140/* General functions */
141/**********************************************************************/
142
143#define fdt_get_header(fdt, field) \
144 (fdt32_to_cpu(((const struct fdt_header *)(fdt))->field))
145#define fdt_magic(fdt) (fdt_get_header(fdt, magic))
146#define fdt_totalsize(fdt) (fdt_get_header(fdt, totalsize))
147#define fdt_off_dt_struct(fdt) (fdt_get_header(fdt, off_dt_struct))
148#define fdt_off_dt_strings(fdt) (fdt_get_header(fdt, off_dt_strings))
149#define fdt_off_mem_rsvmap(fdt) (fdt_get_header(fdt, off_mem_rsvmap))
150#define fdt_version(fdt) (fdt_get_header(fdt, version))
151#define fdt_last_comp_version(fdt) (fdt_get_header(fdt, last_comp_version))
152#define fdt_boot_cpuid_phys(fdt) (fdt_get_header(fdt, boot_cpuid_phys))
153#define fdt_size_dt_strings(fdt) (fdt_get_header(fdt, size_dt_strings))
154#define fdt_size_dt_struct(fdt) (fdt_get_header(fdt, size_dt_struct))
155
156#define __fdt_set_hdr(name) \
157 static inline void fdt_set_##name(void *fdt, uint32_t val) \
158 { \
159 struct fdt_header *fdth = fdt; \
160 fdth->name = cpu_to_fdt32(val); \
161 }
162__fdt_set_hdr(magic);
163__fdt_set_hdr(totalsize);
164__fdt_set_hdr(off_dt_struct);
165__fdt_set_hdr(off_dt_strings);
166__fdt_set_hdr(off_mem_rsvmap);
167__fdt_set_hdr(version);
168__fdt_set_hdr(last_comp_version);
169__fdt_set_hdr(boot_cpuid_phys);
170__fdt_set_hdr(size_dt_strings);
171__fdt_set_hdr(size_dt_struct);
172#undef __fdt_set_hdr
173
174/**
175 * fdt_check_header - sanity check a device tree or possible device tree
176 * @fdt: pointer to data which might be a flattened device tree
177 *
178 * fdt_check_header() checks that the given buffer contains what
179 * appears to be a flattened device tree with sane information in its
180 * header.
181 *
182 * returns:
183 * 0, if the buffer appears to contain a valid device tree
184 * -FDT_ERR_BADMAGIC,
185 * -FDT_ERR_BADVERSION,
186 * -FDT_ERR_BADSTATE, standard meanings, as above
187 */
188int fdt_check_header(const void *fdt);
189
190/**
191 * fdt_move - move a device tree around in memory
192 * @fdt: pointer to the device tree to move
193 * @buf: pointer to memory where the device is to be moved
194 * @bufsize: size of the memory space at buf
195 *
196 * fdt_move() relocates, if possible, the device tree blob located at
197 * fdt to the buffer at buf of size bufsize. The buffer may overlap
198 * with the existing device tree blob at fdt. Therefore,
199 * fdt_move(fdt, fdt, fdt_totalsize(fdt))
200 * should always succeed.
201 *
202 * returns:
203 * 0, on success
204 * -FDT_ERR_NOSPACE, bufsize is insufficient to contain the device tree
205 * -FDT_ERR_BADMAGIC,
206 * -FDT_ERR_BADVERSION,
207 * -FDT_ERR_BADSTATE, standard meanings
208 */
209int fdt_move(const void *fdt, void *buf, int bufsize);
210
211/**********************************************************************/
212/* Read-only functions */
213/**********************************************************************/
214
215/**
216 * fdt_string - retrieve a string from the strings block of a device tree
217 * @fdt: pointer to the device tree blob
218 * @stroffset: offset of the string within the strings block (native endian)
219 *
220 * fdt_string() retrieves a pointer to a single string from the
221 * strings block of the device tree blob at fdt.
222 *
223 * returns:
224 * a pointer to the string, on success
225 * NULL, if stroffset is out of bounds
226 */
227const char *fdt_string(const void *fdt, int stroffset);
228
229/**
230 * fdt_num_mem_rsv - retrieve the number of memory reserve map entries
231 * @fdt: pointer to the device tree blob
232 *
233 * Returns the number of entries in the device tree blob's memory
234 * reservation map. This does not include the terminating 0,0 entry
235 * or any other (0,0) entries reserved for expansion.
236 *
237 * returns:
238 * the number of entries
239 */
240int fdt_num_mem_rsv(const void *fdt);
241
242/**
243 * fdt_get_mem_rsv - retrieve one memory reserve map entry
244 * @fdt: pointer to the device tree blob
245 * @address, @size: pointers to 64-bit variables
246 *
247 * On success, *address and *size will contain the address and size of
248 * the n-th reserve map entry from the device tree blob, in
249 * native-endian format.
250 *
251 * returns:
252 * 0, on success
253 * -FDT_ERR_BADMAGIC,
254 * -FDT_ERR_BADVERSION,
255 * -FDT_ERR_BADSTATE, standard meanings
256 */
257int fdt_get_mem_rsv(const void *fdt, int n, uint64_t *address, uint64_t *size);
258
259/**
260 * fdt_subnode_offset_namelen - find a subnode based on substring
261 * @fdt: pointer to the device tree blob
262 * @parentoffset: structure block offset of a node
263 * @name: name of the subnode to locate
264 * @namelen: number of characters of name to consider
265 *
266 * Identical to fdt_subnode_offset(), but only examine the first
267 * namelen characters of name for matching the subnode name. This is
268 * useful for finding subnodes based on a portion of a larger string,
269 * such as a full path.
270 */
271int fdt_subnode_offset_namelen(const void *fdt, int parentoffset,
272 const char *name, int namelen);
273/**
274 * fdt_subnode_offset - find a subnode of a given node
275 * @fdt: pointer to the device tree blob
276 * @parentoffset: structure block offset of a node
277 * @name: name of the subnode to locate
278 *
279 * fdt_subnode_offset() finds a subnode of the node at structure block
280 * offset parentoffset with the given name. name may include a unit
281 * address, in which case fdt_subnode_offset() will find the subnode
282 * with that unit address, or the unit address may be omitted, in
283 * which case fdt_subnode_offset() will find an arbitrary subnode
284 * whose name excluding unit address matches the given name.
285 *
286 * returns:
287 * structure block offset of the requested subnode (>=0), on success
288 * -FDT_ERR_NOTFOUND, if the requested subnode does not exist
289 * -FDT_ERR_BADOFFSET, if parentoffset did not point to an FDT_BEGIN_NODE tag
290 * -FDT_ERR_BADMAGIC,
291 * -FDT_ERR_BADVERSION,
292 * -FDT_ERR_BADSTATE,
293 * -FDT_ERR_BADSTRUCTURE,
294 * -FDT_ERR_TRUNCATED, standard meanings.
295 */
296int fdt_subnode_offset(const void *fdt, int parentoffset, const char *name);
297
298/**
299 * fdt_path_offset - find a tree node by its full path
300 * @fdt: pointer to the device tree blob
301 * @path: full path of the node to locate
302 *
303 * fdt_path_offset() finds a node of a given path in the device tree.
304 * Each path component may omit the unit address portion, but the
305 * results of this are undefined if any such path component is
306 * ambiguous (that is if there are multiple nodes at the relevant
307 * level matching the given component, differentiated only by unit
308 * address).
309 *
310 * returns:
311 * structure block offset of the node with the requested path (>=0), on success
312 * -FDT_ERR_BADPATH, given path does not begin with '/' or is invalid
313 * -FDT_ERR_NOTFOUND, if the requested node does not exist
314 * -FDT_ERR_BADMAGIC,
315 * -FDT_ERR_BADVERSION,
316 * -FDT_ERR_BADSTATE,
317 * -FDT_ERR_BADSTRUCTURE,
318 * -FDT_ERR_TRUNCATED, standard meanings.
319 */
320int fdt_path_offset(const void *fdt, const char *path);
321
322/**
323 * fdt_get_name - retrieve the name of a given node
324 * @fdt: pointer to the device tree blob
325 * @nodeoffset: structure block offset of the starting node
326 * @lenp: pointer to an integer variable (will be overwritten) or NULL
327 *
328 * fdt_get_name() retrieves the name (including unit address) of the
329 * device tree node at structure block offset nodeoffset. If lenp is
330 * non-NULL, the length of this name is also returned, in the integer
331 * pointed to by lenp.
332 *
333 * returns:
334 * pointer to the node's name, on success
335 * If lenp is non-NULL, *lenp contains the length of that name (>=0)
336 * NULL, on error
337 * if lenp is non-NULL *lenp contains an error code (<0):
338 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
339 * -FDT_ERR_BADMAGIC,
340 * -FDT_ERR_BADVERSION,
341 * -FDT_ERR_BADSTATE, standard meanings
342 */
343const char *fdt_get_name(const void *fdt, int nodeoffset, int *lenp);
344
345/**
346 * fdt_get_property - find a given property in a given node
347 * @fdt: pointer to the device tree blob
348 * @nodeoffset: offset of the node whose property to find
349 * @name: name of the property to find
350 * @lenp: pointer to an integer variable (will be overwritten) or NULL
351 *
352 * fdt_get_property() retrieves a pointer to the fdt_property
353 * structure within the device tree blob corresponding to the property
354 * named 'name' of the node at offset nodeoffset. If lenp is
355 * non-NULL, the length of the property value is also returned, in the
356 * integer pointed to by lenp.
357 *
358 * returns:
359 * pointer to the structure representing the property
360 * if lenp is non-NULL, *lenp contains the length of the property
361 * value (>=0)
362 * NULL, on error
363 * if lenp is non-NULL, *lenp contains an error code (<0):
364 * -FDT_ERR_NOTFOUND, node does not have named property
365 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
366 * -FDT_ERR_BADMAGIC,
367 * -FDT_ERR_BADVERSION,
368 * -FDT_ERR_BADSTATE,
369 * -FDT_ERR_BADSTRUCTURE,
370 * -FDT_ERR_TRUNCATED, standard meanings
371 */
372const struct fdt_property *fdt_get_property(const void *fdt, int nodeoffset,
373 const char *name, int *lenp);
374static inline struct fdt_property *fdt_get_property_w(void *fdt, int nodeoffset,
375 const char *name,
376 int *lenp)
377{
378 return (struct fdt_property *)(uintptr_t)
379 fdt_get_property(fdt, nodeoffset, name, lenp);
380}
381
382/**
383 * fdt_getprop - retrieve the value of a given property
384 * @fdt: pointer to the device tree blob
385 * @nodeoffset: offset of the node whose property to find
386 * @name: name of the property to find
387 * @lenp: pointer to an integer variable (will be overwritten) or NULL
388 *
389 * fdt_getprop() retrieves a pointer to the value of the property
390 * named 'name' of the node at offset nodeoffset (this will be a
391 * pointer to within the device blob itself, not a copy of the value).
392 * If lenp is non-NULL, the length of the property value is also
393 * returned, in the integer pointed to by lenp.
394 *
395 * returns:
396 * pointer to the property's value
397 * if lenp is non-NULL, *lenp contains the length of the property
398 * value (>=0)
399 * NULL, on error
400 * if lenp is non-NULL, *lenp contains an error code (<0):
401 * -FDT_ERR_NOTFOUND, node does not have named property
402 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
403 * -FDT_ERR_BADMAGIC,
404 * -FDT_ERR_BADVERSION,
405 * -FDT_ERR_BADSTATE,
406 * -FDT_ERR_BADSTRUCTURE,
407 * -FDT_ERR_TRUNCATED, standard meanings
408 */
409const void *fdt_getprop(const void *fdt, int nodeoffset,
410 const char *name, int *lenp);
411static inline void *fdt_getprop_w(void *fdt, int nodeoffset,
412 const char *name, int *lenp)
413{
414 return (void *)(uintptr_t)fdt_getprop(fdt, nodeoffset, name, lenp);
415}
416
417/**
418 * fdt_get_phandle - retrieve the phandle of a given node
419 * @fdt: pointer to the device tree blob
420 * @nodeoffset: structure block offset of the node
421 *
422 * fdt_get_phandle() retrieves the phandle of the device tree node at
423 * structure block offset nodeoffset.
424 *
425 * returns:
426 * the phandle of the node at nodeoffset, on success (!= 0, != -1)
427 * 0, if the node has no phandle, or another error occurs
428 */
429uint32_t fdt_get_phandle(const void *fdt, int nodeoffset);
430
431/**
432 * fdt_get_path - determine the full path of a node
433 * @fdt: pointer to the device tree blob
434 * @nodeoffset: offset of the node whose path to find
435 * @buf: character buffer to contain the returned path (will be overwritten)
436 * @buflen: size of the character buffer at buf
437 *
438 * fdt_get_path() computes the full path of the node at offset
439 * nodeoffset, and records that path in the buffer at buf.
440 *
441 * NOTE: This function is expensive, as it must scan the device tree
442 * structure from the start to nodeoffset.
443 *
444 * returns:
445 * 0, on success
446 * buf contains the absolute path of the node at
447 * nodeoffset, as a NUL-terminated string.
448 * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
449 * -FDT_ERR_NOSPACE, the path of the given node is longer than (bufsize-1)
450 * characters and will not fit in the given buffer.
451 * -FDT_ERR_BADMAGIC,
452 * -FDT_ERR_BADVERSION,
453 * -FDT_ERR_BADSTATE,
454 * -FDT_ERR_BADSTRUCTURE, standard meanings
455 */
456int fdt_get_path(const void *fdt, int nodeoffset, char *buf, int buflen);
457
458/**
459 * fdt_supernode_atdepth_offset - find a specific ancestor of a node
460 * @fdt: pointer to the device tree blob
461 * @nodeoffset: offset of the node whose parent to find
462 * @supernodedepth: depth of the ancestor to find
463 * @nodedepth: pointer to an integer variable (will be overwritten) or NULL
464 *
465 * fdt_supernode_atdepth_offset() finds an ancestor of the given node
466 * at a specific depth from the root (where the root itself has depth
467 * 0, its immediate subnodes depth 1 and so forth). So
468 * fdt_supernode_atdepth_offset(fdt, nodeoffset, 0, NULL);
469 * will always return 0, the offset of the root node. If the node at
470 * nodeoffset has depth D, then:
471 * fdt_supernode_atdepth_offset(fdt, nodeoffset, D, NULL);
472 * will return nodeoffset itself.
473 *
474 * NOTE: This function is expensive, as it must scan the device tree
475 * structure from the start to nodeoffset.
476 *
477 * returns:
478
479 * structure block offset of the node at node offset's ancestor
480 * of depth supernodedepth (>=0), on success
481 * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
482* -FDT_ERR_NOTFOUND, supernodedepth was greater than the depth of nodeoffset
483 * -FDT_ERR_BADMAGIC,
484 * -FDT_ERR_BADVERSION,
485 * -FDT_ERR_BADSTATE,
486 * -FDT_ERR_BADSTRUCTURE, standard meanings
487 */
488int fdt_supernode_atdepth_offset(const void *fdt, int nodeoffset,
489 int supernodedepth, int *nodedepth);
490
491/**
492 * fdt_node_depth - find the depth of a given node
493 * @fdt: pointer to the device tree blob
494 * @nodeoffset: offset of the node whose parent to find
495 *
496 * fdt_node_depth() finds the depth of a given node. The root node
497 * has depth 0, its immediate subnodes depth 1 and so forth.
498 *
499 * NOTE: This function is expensive, as it must scan the device tree
500 * structure from the start to nodeoffset.
501 *
502 * returns:
503 * depth of the node at nodeoffset (>=0), on success
504 * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
505 * -FDT_ERR_BADMAGIC,
506 * -FDT_ERR_BADVERSION,
507 * -FDT_ERR_BADSTATE,
508 * -FDT_ERR_BADSTRUCTURE, standard meanings
509 */
510int fdt_node_depth(const void *fdt, int nodeoffset);
511
512/**
513 * fdt_parent_offset - find the parent of a given node
514 * @fdt: pointer to the device tree blob
515 * @nodeoffset: offset of the node whose parent to find
516 *
517 * fdt_parent_offset() locates the parent node of a given node (that
518 * is, it finds the offset of the node which contains the node at
519 * nodeoffset as a subnode).
520 *
521 * NOTE: This function is expensive, as it must scan the device tree
522 * structure from the start to nodeoffset, *twice*.
523 *
524 * returns:
525 * structure block offset of the parent of the node at nodeoffset
526 * (>=0), on success
527 * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
528 * -FDT_ERR_BADMAGIC,
529 * -FDT_ERR_BADVERSION,
530 * -FDT_ERR_BADSTATE,
531 * -FDT_ERR_BADSTRUCTURE, standard meanings
532 */
533int fdt_parent_offset(const void *fdt, int nodeoffset);
534
535/**
536 * fdt_node_offset_by_prop_value - find nodes with a given property value
537 * @fdt: pointer to the device tree blob
538 * @startoffset: only find nodes after this offset
539 * @propname: property name to check
540 * @propval: property value to search for
541 * @proplen: length of the value in propval
542 *
543 * fdt_node_offset_by_prop_value() returns the offset of the first
544 * node after startoffset, which has a property named propname whose
545 * value is of length proplen and has value equal to propval; or if
546 * startoffset is -1, the very first such node in the tree.
547 *
548 * To iterate through all nodes matching the criterion, the following
549 * idiom can be used:
550 * offset = fdt_node_offset_by_prop_value(fdt, -1, propname,
551 * propval, proplen);
552 * while (offset != -FDT_ERR_NOTFOUND) {
553 * // other code here
554 * offset = fdt_node_offset_by_prop_value(fdt, offset, propname,
555 * propval, proplen);
556 * }
557 *
558 * Note the -1 in the first call to the function, if 0 is used here
559 * instead, the function will never locate the root node, even if it
560 * matches the criterion.
561 *
562 * returns:
563 * structure block offset of the located node (>= 0, >startoffset),
564 * on success
565 * -FDT_ERR_NOTFOUND, no node matching the criterion exists in the
566 * tree after startoffset
567 * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
568 * -FDT_ERR_BADMAGIC,
569 * -FDT_ERR_BADVERSION,
570 * -FDT_ERR_BADSTATE,
571 * -FDT_ERR_BADSTRUCTURE, standard meanings
572 */
573int fdt_node_offset_by_prop_value(const void *fdt, int startoffset,
574 const char *propname,
575 const void *propval, int proplen);
576
577/**
578 * fdt_node_offset_by_phandle - find the node with a given phandle
579 * @fdt: pointer to the device tree blob
580 * @phandle: phandle value
581 *
582 * fdt_node_offset_by_phandle() returns the offset of the node
583 * which has the given phandle value. If there is more than one node
584 * in the tree with the given phandle (an invalid tree), results are
585 * undefined.
586 *
587 * returns:
588 * structure block offset of the located node (>= 0), on success
589 * -FDT_ERR_NOTFOUND, no node with that phandle exists
590 * -FDT_ERR_BADPHANDLE, given phandle value was invalid (0 or -1)
591 * -FDT_ERR_BADMAGIC,
592 * -FDT_ERR_BADVERSION,
593 * -FDT_ERR_BADSTATE,
594 * -FDT_ERR_BADSTRUCTURE, standard meanings
595 */
596int fdt_node_offset_by_phandle(const void *fdt, uint32_t phandle);
597
598/**
599 * fdt_node_check_compatible: check a node's compatible property
600 * @fdt: pointer to the device tree blob
601 * @nodeoffset: offset of a tree node
602 * @compatible: string to match against
603 *
604 *
605 * fdt_node_check_compatible() returns 0 if the given node contains a
606 * 'compatible' property with the given string as one of its elements,
607 * it returns non-zero otherwise, or on error.
608 *
609 * returns:
610 * 0, if the node has a 'compatible' property listing the given string
611 * 1, if the node has a 'compatible' property, but it does not list
612 * the given string
613 * -FDT_ERR_NOTFOUND, if the given node has no 'compatible' property
614 * -FDT_ERR_BADOFFSET, if nodeoffset does not refer to a BEGIN_NODE tag
615 * -FDT_ERR_BADMAGIC,
616 * -FDT_ERR_BADVERSION,
617 * -FDT_ERR_BADSTATE,
618 * -FDT_ERR_BADSTRUCTURE, standard meanings
619 */
620int fdt_node_check_compatible(const void *fdt, int nodeoffset,
621 const char *compatible);
622
623/**
624 * fdt_node_offset_by_compatible - find nodes with a given 'compatible' value
625 * @fdt: pointer to the device tree blob
626 * @startoffset: only find nodes after this offset
627 * @compatible: 'compatible' string to match against
628 *
629 * fdt_node_offset_by_compatible() returns the offset of the first
630 * node after startoffset, which has a 'compatible' property which
631 * lists the given compatible string; or if startoffset is -1, the
632 * very first such node in the tree.
633 *
634 * To iterate through all nodes matching the criterion, the following
635 * idiom can be used:
636 * offset = fdt_node_offset_by_compatible(fdt, -1, compatible);
637 * while (offset != -FDT_ERR_NOTFOUND) {
638 * // other code here
639 * offset = fdt_node_offset_by_compatible(fdt, offset, compatible);
640 * }
641 *
642 * Note the -1 in the first call to the function, if 0 is used here
643 * instead, the function will never locate the root node, even if it
644 * matches the criterion.
645 *
646 * returns:
647 * structure block offset of the located node (>= 0, >startoffset),
648 * on success
649 * -FDT_ERR_NOTFOUND, no node matching the criterion exists in the
650 * tree after startoffset
651 * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
652 * -FDT_ERR_BADMAGIC,
653 * -FDT_ERR_BADVERSION,
654 * -FDT_ERR_BADSTATE,
655 * -FDT_ERR_BADSTRUCTURE, standard meanings
656 */
657int fdt_node_offset_by_compatible(const void *fdt, int startoffset,
658 const char *compatible);
659
660/**********************************************************************/
661/* Write-in-place functions */
662/**********************************************************************/
663
664/**
665 * fdt_setprop_inplace - change a property's value, but not its size
666 * @fdt: pointer to the device tree blob
667 * @nodeoffset: offset of the node whose property to change
668 * @name: name of the property to change
669 * @val: pointer to data to replace the property value with
670 * @len: length of the property value
671 *
672 * fdt_setprop_inplace() replaces the value of a given property with
673 * the data in val, of length len. This function cannot change the
674 * size of a property, and so will only work if len is equal to the
675 * current length of the property.
676 *
677 * This function will alter only the bytes in the blob which contain
678 * the given property value, and will not alter or move any other part
679 * of the tree.
680 *
681 * returns:
682 * 0, on success
683 * -FDT_ERR_NOSPACE, if len is not equal to the property's current length
684 * -FDT_ERR_NOTFOUND, node does not have the named property
685 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
686 * -FDT_ERR_BADMAGIC,
687 * -FDT_ERR_BADVERSION,
688 * -FDT_ERR_BADSTATE,
689 * -FDT_ERR_BADSTRUCTURE,
690 * -FDT_ERR_TRUNCATED, standard meanings
691 */
692int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
693 const void *val, int len);
694
695/**
696 * fdt_setprop_inplace_cell - change the value of a single-cell property
697 * @fdt: pointer to the device tree blob
698 * @nodeoffset: offset of the node whose property to change
699 * @name: name of the property to change
700 * @val: cell (32-bit integer) value to replace the property with
701 *
702 * fdt_setprop_inplace_cell() replaces the value of a given property
703 * with the 32-bit integer cell value in val, converting val to
704 * big-endian if necessary. This function cannot change the size of a
705 * property, and so will only work if the property already exists and
706 * has length 4.
707 *
708 * This function will alter only the bytes in the blob which contain
709 * the given property value, and will not alter or move any other part
710 * of the tree.
711 *
712 * returns:
713 * 0, on success
714 * -FDT_ERR_NOSPACE, if the property's length is not equal to 4
715 * -FDT_ERR_NOTFOUND, node does not have the named property
716 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
717 * -FDT_ERR_BADMAGIC,
718 * -FDT_ERR_BADVERSION,
719 * -FDT_ERR_BADSTATE,
720 * -FDT_ERR_BADSTRUCTURE,
721 * -FDT_ERR_TRUNCATED, standard meanings
722 */
723static inline int fdt_setprop_inplace_cell(void *fdt, int nodeoffset,
724 const char *name, uint32_t val)
725{
726 val = cpu_to_fdt32(val);
727 return fdt_setprop_inplace(fdt, nodeoffset, name, &val, sizeof(val));
728}
729
730/**
731 * fdt_nop_property - replace a property with nop tags
732 * @fdt: pointer to the device tree blob
733 * @nodeoffset: offset of the node whose property to nop
734 * @name: name of the property to nop
735 *
736 * fdt_nop_property() will replace a given property's representation
737 * in the blob with FDT_NOP tags, effectively removing it from the
738 * tree.
739 *
740 * This function will alter only the bytes in the blob which contain
741 * the property, and will not alter or move any other part of the
742 * tree.
743 *
744 * returns:
745 * 0, on success
746 * -FDT_ERR_NOTFOUND, node does not have the named property
747 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
748 * -FDT_ERR_BADMAGIC,
749 * -FDT_ERR_BADVERSION,
750 * -FDT_ERR_BADSTATE,
751 * -FDT_ERR_BADSTRUCTURE,
752 * -FDT_ERR_TRUNCATED, standard meanings
753 */
754int fdt_nop_property(void *fdt, int nodeoffset, const char *name);
755
756/**
757 * fdt_nop_node - replace a node (subtree) with nop tags
758 * @fdt: pointer to the device tree blob
759 * @nodeoffset: offset of the node to nop
760 *
761 * fdt_nop_node() will replace a given node's representation in the
762 * blob, including all its subnodes, if any, with FDT_NOP tags,
763 * effectively removing it from the tree.
764 *
765 * This function will alter only the bytes in the blob which contain
766 * the node and its properties and subnodes, and will not alter or
767 * move any other part of the tree.
768 *
769 * returns:
770 * 0, on success
771 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
772 * -FDT_ERR_BADMAGIC,
773 * -FDT_ERR_BADVERSION,
774 * -FDT_ERR_BADSTATE,
775 * -FDT_ERR_BADSTRUCTURE,
776 * -FDT_ERR_TRUNCATED, standard meanings
777 */
778int fdt_nop_node(void *fdt, int nodeoffset);
779
780/**********************************************************************/
781/* Sequential write functions */
782/**********************************************************************/
783
784int fdt_create(void *buf, int bufsize);
785int fdt_add_reservemap_entry(void *fdt, uint64_t addr, uint64_t size);
786int fdt_finish_reservemap(void *fdt);
787int fdt_begin_node(void *fdt, const char *name);
788int fdt_property(void *fdt, const char *name, const void *val, int len);
789static inline int fdt_property_cell(void *fdt, const char *name, uint32_t val)
790{
791 val = cpu_to_fdt32(val);
792 return fdt_property(fdt, name, &val, sizeof(val));
793}
794#define fdt_property_string(fdt, name, str) \
795 fdt_property(fdt, name, str, strlen(str)+1)
796int fdt_end_node(void *fdt);
797int fdt_finish(void *fdt);
798
799/**********************************************************************/
800/* Read-write functions */
801/**********************************************************************/
802
803int fdt_open_into(const void *fdt, void *buf, int bufsize);
804int fdt_pack(void *fdt);
805
806/**
807 * fdt_add_mem_rsv - add one memory reserve map entry
808 * @fdt: pointer to the device tree blob
809 * @address, @size: 64-bit values (native endian)
810 *
811 * Adds a reserve map entry to the given blob reserving a region at
812 * address address of length size.
813 *
814 * This function will insert data into the reserve map and will
815 * therefore change the indexes of some entries in the table.
816 *
817 * returns:
818 * 0, on success
819 * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
820 * contain the new reservation entry
821 * -FDT_ERR_BADMAGIC,
822 * -FDT_ERR_BADVERSION,
823 * -FDT_ERR_BADSTATE,
824 * -FDT_ERR_BADSTRUCTURE,
825 * -FDT_ERR_BADLAYOUT,
826 * -FDT_ERR_TRUNCATED, standard meanings
827 */
828int fdt_add_mem_rsv(void *fdt, uint64_t address, uint64_t size);
829
830/**
831 * fdt_del_mem_rsv - remove a memory reserve map entry
832 * @fdt: pointer to the device tree blob
833 * @n: entry to remove
834 *
835 * fdt_del_mem_rsv() removes the n-th memory reserve map entry from
836 * the blob.
837 *
838 * This function will delete data from the reservation table and will
839 * therefore change the indexes of some entries in the table.
840 *
841 * returns:
842 * 0, on success
843 * -FDT_ERR_NOTFOUND, there is no entry of the given index (i.e. there
844 * are less than n+1 reserve map entries)
845 * -FDT_ERR_BADMAGIC,
846 * -FDT_ERR_BADVERSION,
847 * -FDT_ERR_BADSTATE,
848 * -FDT_ERR_BADSTRUCTURE,
849 * -FDT_ERR_BADLAYOUT,
850 * -FDT_ERR_TRUNCATED, standard meanings
851 */
852int fdt_del_mem_rsv(void *fdt, int n);
853
854/**
855 * fdt_set_name - change the name of a given node
856 * @fdt: pointer to the device tree blob
857 * @nodeoffset: structure block offset of a node
858 * @name: name to give the node
859 *
860 * fdt_set_name() replaces the name (including unit address, if any)
861 * of the given node with the given string. NOTE: this function can't
862 * efficiently check if the new name is unique amongst the given
863 * node's siblings; results are undefined if this function is invoked
864 * with a name equal to one of the given node's siblings.
865 *
866 * This function may insert or delete data from the blob, and will
867 * therefore change the offsets of some existing nodes.
868 *
869 * returns:
870 * 0, on success
871 * -FDT_ERR_NOSPACE, there is insufficient free space in the blob
872 * to contain the new name
873 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
874 * -FDT_ERR_BADMAGIC,
875 * -FDT_ERR_BADVERSION,
876 * -FDT_ERR_BADSTATE, standard meanings
877 */
878int fdt_set_name(void *fdt, int nodeoffset, const char *name);
879
880/**
881 * fdt_setprop - create or change a property
882 * @fdt: pointer to the device tree blob
883 * @nodeoffset: offset of the node whose property to change
884 * @name: name of the property to change
885 * @val: pointer to data to set the property value to
886 * @len: length of the property value
887 *
888 * fdt_setprop() sets the value of the named property in the given
889 * node to the given value and length, creating the property if it
890 * does not already exist.
891 *
892 * This function may insert or delete data from the blob, and will
893 * therefore change the offsets of some existing nodes.
894 *
895 * returns:
896 * 0, on success
897 * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
898 * contain the new property value
899 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
900 * -FDT_ERR_BADLAYOUT,
901 * -FDT_ERR_BADMAGIC,
902 * -FDT_ERR_BADVERSION,
903 * -FDT_ERR_BADSTATE,
904 * -FDT_ERR_BADSTRUCTURE,
905 * -FDT_ERR_BADLAYOUT,
906 * -FDT_ERR_TRUNCATED, standard meanings
907 */
908int fdt_setprop(void *fdt, int nodeoffset, const char *name,
909 const void *val, int len);
910
911/**
912 * fdt_setprop_cell - set a property to a single cell value
913 * @fdt: pointer to the device tree blob
914 * @nodeoffset: offset of the node whose property to change
915 * @name: name of the property to change
916 * @val: 32-bit integer value for the property (native endian)
917 *
918 * fdt_setprop_cell() sets the value of the named property in the
919 * given node to the given cell value (converting to big-endian if
920 * necessary), or creates a new property with that value if it does
921 * not already exist.
922 *
923 * This function may insert or delete data from the blob, and will
924 * therefore change the offsets of some existing nodes.
925 *
926 * returns:
927 * 0, on success
928 * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
929 * contain the new property value
930 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
931 * -FDT_ERR_BADLAYOUT,
932 * -FDT_ERR_BADMAGIC,
933 * -FDT_ERR_BADVERSION,
934 * -FDT_ERR_BADSTATE,
935 * -FDT_ERR_BADSTRUCTURE,
936 * -FDT_ERR_BADLAYOUT,
937 * -FDT_ERR_TRUNCATED, standard meanings
938 */
939static inline int fdt_setprop_cell(void *fdt, int nodeoffset, const char *name,
940 uint32_t val)
941{
942 val = cpu_to_fdt32(val);
943 return fdt_setprop(fdt, nodeoffset, name, &val, sizeof(val));
944}
945
946/**
947 * fdt_setprop_string - set a property to a string value
948 * @fdt: pointer to the device tree blob
949 * @nodeoffset: offset of the node whose property to change
950 * @name: name of the property to change
951 * @str: string value for the property
952 *
953 * fdt_setprop_string() sets the value of the named property in the
954 * given node to the given string value (using the length of the
955 * string to determine the new length of the property), or creates a
956 * new property with that value if it does not already exist.
957 *
958 * This function may insert or delete data from the blob, and will
959 * therefore change the offsets of some existing nodes.
960 *
961 * returns:
962 * 0, on success
963 * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
964 * contain the new property value
965 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
966 * -FDT_ERR_BADLAYOUT,
967 * -FDT_ERR_BADMAGIC,
968 * -FDT_ERR_BADVERSION,
969 * -FDT_ERR_BADSTATE,
970 * -FDT_ERR_BADSTRUCTURE,
971 * -FDT_ERR_BADLAYOUT,
972 * -FDT_ERR_TRUNCATED, standard meanings
973 */
974#define fdt_setprop_string(fdt, nodeoffset, name, str) \
975 fdt_setprop((fdt), (nodeoffset), (name), (str), strlen(str)+1)
976
977/**
978 * fdt_delprop - delete a property
979 * @fdt: pointer to the device tree blob
980 * @nodeoffset: offset of the node whose property to nop
981 * @name: name of the property to nop
982 *
983 * fdt_del_property() will delete the given property.
984 *
985 * This function will delete data from the blob, and will therefore
986 * change the offsets of some existing nodes.
987 *
988 * returns:
989 * 0, on success
990 * -FDT_ERR_NOTFOUND, node does not have the named property
991 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
992 * -FDT_ERR_BADLAYOUT,
993 * -FDT_ERR_BADMAGIC,
994 * -FDT_ERR_BADVERSION,
995 * -FDT_ERR_BADSTATE,
996 * -FDT_ERR_BADSTRUCTURE,
997 * -FDT_ERR_TRUNCATED, standard meanings
998 */
999int fdt_delprop(void *fdt, int nodeoffset, const char *name);
1000
1001/**
1002 * fdt_add_subnode_namelen - creates a new node based on substring
1003 * @fdt: pointer to the device tree blob
1004 * @parentoffset: structure block offset of a node
1005 * @name: name of the subnode to locate
1006 * @namelen: number of characters of name to consider
1007 *
1008 * Identical to fdt_add_subnode(), but use only the first namelen
1009 * characters of name as the name of the new node. This is useful for
1010 * creating subnodes based on a portion of a larger string, such as a
1011 * full path.
1012 */
1013int fdt_add_subnode_namelen(void *fdt, int parentoffset,
1014 const char *name, int namelen);
1015
1016/**
1017 * fdt_add_subnode - creates a new node
1018 * @fdt: pointer to the device tree blob
1019 * @parentoffset: structure block offset of a node
1020 * @name: name of the subnode to locate
1021 *
1022 * fdt_add_subnode() creates a new node as a subnode of the node at
1023 * structure block offset parentoffset, with the given name (which
1024 * should include the unit address, if any).
1025 *
1026 * This function will insert data into the blob, and will therefore
1027 * change the offsets of some existing nodes.
1028
1029 * returns:
1030 * structure block offset of the created nodeequested subnode (>=0), on success
1031 * -FDT_ERR_NOTFOUND, if the requested subnode does not exist
1032 * -FDT_ERR_BADOFFSET, if parentoffset did not point to an FDT_BEGIN_NODE tag
1033 * -FDT_ERR_EXISTS, if the node at parentoffset already has a subnode of
1034 * the given name
1035 * -FDT_ERR_NOSPACE, if there is insufficient free space in the
1036 * blob to contain the new node
1037 * -FDT_ERR_NOSPACE
1038 * -FDT_ERR_BADLAYOUT
1039 * -FDT_ERR_BADMAGIC,
1040 * -FDT_ERR_BADVERSION,
1041 * -FDT_ERR_BADSTATE,
1042 * -FDT_ERR_BADSTRUCTURE,
1043 * -FDT_ERR_TRUNCATED, standard meanings.
1044 */
1045int fdt_add_subnode(void *fdt, int parentoffset, const char *name);
1046
1047/**
1048 * fdt_del_node - delete a node (subtree)
1049 * @fdt: pointer to the device tree blob
1050 * @nodeoffset: offset of the node to nop
1051 *
1052 * fdt_del_node() will remove the given node, including all its
1053 * subnodes if any, from the blob.
1054 *
1055 * This function will delete data from the blob, and will therefore
1056 * change the offsets of some existing nodes.
1057 *
1058 * returns:
1059 * 0, on success
1060 * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
1061 * -FDT_ERR_BADLAYOUT,
1062 * -FDT_ERR_BADMAGIC,
1063 * -FDT_ERR_BADVERSION,
1064 * -FDT_ERR_BADSTATE,
1065 * -FDT_ERR_BADSTRUCTURE,
1066 * -FDT_ERR_TRUNCATED, standard meanings
1067 */
1068int fdt_del_node(void *fdt, int nodeoffset);
1069
1070/**********************************************************************/
1071/* Debugging / informational functions */
1072/**********************************************************************/
1073
1074const char *fdt_strerror(int errval);
1075
1076#endif /* _LIBFDT_H */
diff --git a/scripts/dtc/libfdt/libfdt_env.h b/scripts/dtc/libfdt/libfdt_env.h
new file mode 100644
index 000000000000..449bf602daf1
--- /dev/null
+++ b/scripts/dtc/libfdt/libfdt_env.h
@@ -0,0 +1,23 @@
1#ifndef _LIBFDT_ENV_H
2#define _LIBFDT_ENV_H
3
4#include <stddef.h>
5#include <stdint.h>
6#include <string.h>
7
8#define _B(n) ((unsigned long long)((uint8_t *)&x)[n])
9static inline uint32_t fdt32_to_cpu(uint32_t x)
10{
11 return (_B(0) << 24) | (_B(1) << 16) | (_B(2) << 8) | _B(3);
12}
13#define cpu_to_fdt32(x) fdt32_to_cpu(x)
14
15static inline uint64_t fdt64_to_cpu(uint64_t x)
16{
17 return (_B(0) << 56) | (_B(1) << 48) | (_B(2) << 40) | (_B(3) << 32)
18 | (_B(4) << 24) | (_B(5) << 16) | (_B(6) << 8) | _B(7);
19}
20#define cpu_to_fdt64(x) fdt64_to_cpu(x)
21#undef _B
22
23#endif /* _LIBFDT_ENV_H */
diff --git a/scripts/dtc/libfdt/libfdt_internal.h b/scripts/dtc/libfdt/libfdt_internal.h
new file mode 100644
index 000000000000..46eb93e4af5c
--- /dev/null
+++ b/scripts/dtc/libfdt/libfdt_internal.h
@@ -0,0 +1,95 @@
1#ifndef _LIBFDT_INTERNAL_H
2#define _LIBFDT_INTERNAL_H
3/*
4 * libfdt - Flat Device Tree manipulation
5 * Copyright (C) 2006 David Gibson, IBM Corporation.
6 *
7 * libfdt is dual licensed: you can use it either under the terms of
8 * the GPL, or the BSD license, at your option.
9 *
10 * a) This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of the
13 * License, or (at your option) any later version.
14 *
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public
21 * License along with this library; if not, write to the Free
22 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
23 * MA 02110-1301 USA
24 *
25 * Alternatively,
26 *
27 * b) Redistribution and use in source and binary forms, with or
28 * without modification, are permitted provided that the following
29 * conditions are met:
30 *
31 * 1. Redistributions of source code must retain the above
32 * copyright notice, this list of conditions and the following
33 * disclaimer.
34 * 2. Redistributions in binary form must reproduce the above
35 * copyright notice, this list of conditions and the following
36 * disclaimer in the documentation and/or other materials
37 * provided with the distribution.
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
40 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
41 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
42 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
43 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
44 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
49 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
50 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
51 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
52 */
53#include <fdt.h>
54
55#define FDT_ALIGN(x, a) (((x) + (a) - 1) & ~((a) - 1))
56#define FDT_TAGALIGN(x) (FDT_ALIGN((x), FDT_TAGSIZE))
57
58#define FDT_CHECK_HEADER(fdt) \
59 { \
60 int err; \
61 if ((err = fdt_check_header(fdt)) != 0) \
62 return err; \
63 }
64
65uint32_t _fdt_next_tag(const void *fdt, int startoffset, int *nextoffset);
66int _fdt_check_node_offset(const void *fdt, int offset);
67const char *_fdt_find_string(const char *strtab, int tabsize, const char *s);
68int _fdt_node_end_offset(void *fdt, int nodeoffset);
69
70static inline const void *_fdt_offset_ptr(const void *fdt, int offset)
71{
72 return (const char *)fdt + fdt_off_dt_struct(fdt) + offset;
73}
74
75static inline void *_fdt_offset_ptr_w(void *fdt, int offset)
76{
77 return (void *)(uintptr_t)_fdt_offset_ptr(fdt, offset);
78}
79
80static inline const struct fdt_reserve_entry *_fdt_mem_rsv(const void *fdt, int n)
81{
82 const struct fdt_reserve_entry *rsv_table =
83 (const struct fdt_reserve_entry *)
84 ((const char *)fdt + fdt_off_mem_rsvmap(fdt));
85
86 return rsv_table + n;
87}
88static inline struct fdt_reserve_entry *_fdt_mem_rsv_w(void *fdt, int n)
89{
90 return (void *)(uintptr_t)_fdt_mem_rsv(fdt, n);
91}
92
93#define FDT_SW_MAGIC (~FDT_MAGIC)
94
95#endif /* _LIBFDT_INTERNAL_H */
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