aboutsummaryrefslogtreecommitdiffstats
path: root/arch/powerpc/boot/libfdt/fdt_rw.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/boot/libfdt/fdt_rw.c')
-rw-r--r--arch/powerpc/boot/libfdt/fdt_rw.c463
1 files changed, 0 insertions, 463 deletions
diff --git a/arch/powerpc/boot/libfdt/fdt_rw.c b/arch/powerpc/boot/libfdt/fdt_rw.c
deleted file mode 100644
index 8e7ec4cb7bcd..000000000000
--- a/arch/powerpc/boot/libfdt/fdt_rw.c
+++ /dev/null
@@ -1,463 +0,0 @@
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}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-26 21:40:07 -0500