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[people/ms/u-boot.git] / common / cmd_fdt.c
1 /*
2 * (C) Copyright 2007
3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
4 * Based on code written by:
5 * Pantelis Antoniou <pantelis.antoniou@gmail.com> and
6 * Matthew McClintock <msm@freescale.com>
7 *
8 * See file CREDITS for list of people who contributed to this
9 * project.
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 * MA 02111-1307 USA
25 */
26
27 #include <common.h>
28 #include <command.h>
29 #include <linux/ctype.h>
30 #include <linux/types.h>
31 #include <asm/global_data.h>
32 #include <fdt.h>
33 #include <libfdt.h>
34 #include <fdt_support.h>
35
36 #define MAX_LEVEL 32 /* how deeply nested we will go */
37 #define SCRATCHPAD 1024 /* bytes of scratchpad memory */
38
39 /*
40 * Global data (for the gd->bd)
41 */
42 DECLARE_GLOBAL_DATA_PTR;
43
44 static int fdt_valid(void);
45 static int fdt_parse_prop(char **newval, int count, char *data, int *len);
46 static int fdt_print(const char *pathp, char *prop, int depth);
47
48 /*
49 * The working_fdt points to our working flattened device tree.
50 */
51 struct fdt_header *working_fdt;
52
53 void set_working_fdt_addr(void *addr)
54 {
55 char buf[17];
56
57 working_fdt = addr;
58
59 sprintf(buf, "%lx", (unsigned long)addr);
60 setenv("fdtaddr", buf);
61 }
62
63 /*
64 * Flattened Device Tree command, see the help for parameter definitions.
65 */
66 int do_fdt (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
67 {
68 if (argc < 2) {
69 printf ("Usage:\n%s\n", cmdtp->usage);
70 return 1;
71 }
72
73 /********************************************************************
74 * Set the address of the fdt
75 ********************************************************************/
76 if (argv[1][0] == 'a') {
77 unsigned long addr;
78 /*
79 * Set the address [and length] of the fdt.
80 */
81 if (argc == 2) {
82 if (!fdt_valid()) {
83 return 1;
84 }
85 printf("The address of the fdt is %p\n", working_fdt);
86 return 0;
87 }
88
89 addr = simple_strtoul(argv[2], NULL, 16);
90 set_working_fdt_addr((void *)addr);
91
92 if (!fdt_valid()) {
93 return 1;
94 }
95
96 if (argc >= 4) {
97 int len;
98 int err;
99 /*
100 * Optional new length
101 */
102 len = simple_strtoul(argv[3], NULL, 16);
103 if (len < fdt_totalsize(working_fdt)) {
104 printf ("New length %d < existing length %d, "
105 "ignoring.\n",
106 len, fdt_totalsize(working_fdt));
107 } else {
108 /*
109 * Open in place with a new length.
110 */
111 err = fdt_open_into(working_fdt, working_fdt, len);
112 if (err != 0) {
113 printf ("libfdt fdt_open_into(): %s\n",
114 fdt_strerror(err));
115 }
116 }
117 }
118
119 /********************************************************************
120 * Move the working_fdt
121 ********************************************************************/
122 } else if (strncmp(argv[1], "mo", 2) == 0) {
123 struct fdt_header *newaddr;
124 int len;
125 int err;
126
127 if (argc < 4) {
128 printf ("Usage:\n%s\n", cmdtp->usage);
129 return 1;
130 }
131
132 /*
133 * Set the address and length of the fdt.
134 */
135 working_fdt = (struct fdt_header *)simple_strtoul(argv[2], NULL, 16);
136 if (!fdt_valid()) {
137 return 1;
138 }
139
140 newaddr = (struct fdt_header *)simple_strtoul(argv[3],NULL,16);
141
142 /*
143 * If the user specifies a length, use that. Otherwise use the
144 * current length.
145 */
146 if (argc <= 4) {
147 len = fdt_totalsize(working_fdt);
148 } else {
149 len = simple_strtoul(argv[4], NULL, 16);
150 if (len < fdt_totalsize(working_fdt)) {
151 printf ("New length 0x%X < existing length "
152 "0x%X, aborting.\n",
153 len, fdt_totalsize(working_fdt));
154 return 1;
155 }
156 }
157
158 /*
159 * Copy to the new location.
160 */
161 err = fdt_open_into(working_fdt, newaddr, len);
162 if (err != 0) {
163 printf ("libfdt fdt_open_into(): %s\n",
164 fdt_strerror(err));
165 return 1;
166 }
167 working_fdt = newaddr;
168
169 /********************************************************************
170 * Make a new node
171 ********************************************************************/
172 } else if (strncmp(argv[1], "mk", 2) == 0) {
173 char *pathp; /* path */
174 char *nodep; /* new node to add */
175 int nodeoffset; /* node offset from libfdt */
176 int err;
177
178 /*
179 * Parameters: Node path, new node to be appended to the path.
180 */
181 if (argc < 4) {
182 printf ("Usage:\n%s\n", cmdtp->usage);
183 return 1;
184 }
185
186 pathp = argv[2];
187 nodep = argv[3];
188
189 nodeoffset = fdt_path_offset (working_fdt, pathp);
190 if (nodeoffset < 0) {
191 /*
192 * Not found or something else bad happened.
193 */
194 printf ("libfdt fdt_path_offset() returned %s\n",
195 fdt_strerror(nodeoffset));
196 return 1;
197 }
198 err = fdt_add_subnode(working_fdt, nodeoffset, nodep);
199 if (err < 0) {
200 printf ("libfdt fdt_add_subnode(): %s\n",
201 fdt_strerror(err));
202 return 1;
203 }
204
205 /********************************************************************
206 * Set the value of a property in the working_fdt.
207 ********************************************************************/
208 } else if (argv[1][0] == 's') {
209 char *pathp; /* path */
210 char *prop; /* property */
211 int nodeoffset; /* node offset from libfdt */
212 static char data[SCRATCHPAD]; /* storage for the property */
213 int len; /* new length of the property */
214 int ret; /* return value */
215
216 /*
217 * Parameters: Node path, property, optional value.
218 */
219 if (argc < 4) {
220 printf ("Usage:\n%s\n", cmdtp->usage);
221 return 1;
222 }
223
224 pathp = argv[2];
225 prop = argv[3];
226 if (argc == 4) {
227 len = 0;
228 } else {
229 ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
230 if (ret != 0)
231 return ret;
232 }
233
234 nodeoffset = fdt_path_offset (working_fdt, pathp);
235 if (nodeoffset < 0) {
236 /*
237 * Not found or something else bad happened.
238 */
239 printf ("libfdt fdt_path_offset() returned %s\n",
240 fdt_strerror(nodeoffset));
241 return 1;
242 }
243
244 ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
245 if (ret < 0) {
246 printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
247 return 1;
248 }
249
250 /********************************************************************
251 * Print (recursive) / List (single level)
252 ********************************************************************/
253 } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
254 int depth = MAX_LEVEL; /* how deep to print */
255 char *pathp; /* path */
256 char *prop; /* property */
257 int ret; /* return value */
258 static char root[2] = "/";
259
260 /*
261 * list is an alias for print, but limited to 1 level
262 */
263 if (argv[1][0] == 'l') {
264 depth = 1;
265 }
266
267 /*
268 * Get the starting path. The root node is an oddball,
269 * the offset is zero and has no name.
270 */
271 if (argc == 2)
272 pathp = root;
273 else
274 pathp = argv[2];
275 if (argc > 3)
276 prop = argv[3];
277 else
278 prop = NULL;
279
280 ret = fdt_print(pathp, prop, depth);
281 if (ret != 0)
282 return ret;
283
284 /********************************************************************
285 * Remove a property/node
286 ********************************************************************/
287 } else if (strncmp(argv[1], "rm", 2) == 0) {
288 int nodeoffset; /* node offset from libfdt */
289 int err;
290
291 /*
292 * Get the path. The root node is an oddball, the offset
293 * is zero and has no name.
294 */
295 nodeoffset = fdt_path_offset (working_fdt, argv[2]);
296 if (nodeoffset < 0) {
297 /*
298 * Not found or something else bad happened.
299 */
300 printf ("libfdt fdt_path_offset() returned %s\n",
301 fdt_strerror(nodeoffset));
302 return 1;
303 }
304 /*
305 * Do the delete. A fourth parameter means delete a property,
306 * otherwise delete the node.
307 */
308 if (argc > 3) {
309 err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
310 if (err < 0) {
311 printf("libfdt fdt_delprop(): %s\n",
312 fdt_strerror(err));
313 return err;
314 }
315 } else {
316 err = fdt_del_node(working_fdt, nodeoffset);
317 if (err < 0) {
318 printf("libfdt fdt_del_node(): %s\n",
319 fdt_strerror(err));
320 return err;
321 }
322 }
323
324 /********************************************************************
325 * Display header info
326 ********************************************************************/
327 } else if (argv[1][0] == 'h') {
328 u32 version = fdt_version(working_fdt);
329 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
330 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
331 fdt_totalsize(working_fdt));
332 printf("off_dt_struct:\t\t0x%x\n",
333 fdt_off_dt_struct(working_fdt));
334 printf("off_dt_strings:\t\t0x%x\n",
335 fdt_off_dt_strings(working_fdt));
336 printf("off_mem_rsvmap:\t\t0x%x\n",
337 fdt_off_mem_rsvmap(working_fdt));
338 printf("version:\t\t%d\n", version);
339 printf("last_comp_version:\t%d\n",
340 fdt_last_comp_version(working_fdt));
341 if (version >= 2)
342 printf("boot_cpuid_phys:\t0x%x\n",
343 fdt_boot_cpuid_phys(working_fdt));
344 if (version >= 3)
345 printf("size_dt_strings:\t0x%x\n",
346 fdt_size_dt_strings(working_fdt));
347 if (version >= 17)
348 printf("size_dt_struct:\t\t0x%x\n",
349 fdt_size_dt_struct(working_fdt));
350 printf("number mem_rsv:\t\t0x%x\n",
351 fdt_num_mem_rsv(working_fdt));
352 printf("\n");
353
354 /********************************************************************
355 * Set boot cpu id
356 ********************************************************************/
357 } else if (strncmp(argv[1], "boo", 3) == 0) {
358 unsigned long tmp = simple_strtoul(argv[2], NULL, 16);
359 fdt_set_boot_cpuid_phys(working_fdt, tmp);
360
361 /********************************************************************
362 * memory command
363 ********************************************************************/
364 } else if (strncmp(argv[1], "me", 2) == 0) {
365 uint64_t addr, size;
366 int err;
367 #ifdef CONFIG_SYS_64BIT_STRTOUL
368 addr = simple_strtoull(argv[2], NULL, 16);
369 size = simple_strtoull(argv[3], NULL, 16);
370 #else
371 addr = simple_strtoul(argv[2], NULL, 16);
372 size = simple_strtoul(argv[3], NULL, 16);
373 #endif
374 err = fdt_fixup_memory(working_fdt, addr, size);
375 if (err < 0)
376 return err;
377
378 /********************************************************************
379 * mem reserve commands
380 ********************************************************************/
381 } else if (strncmp(argv[1], "rs", 2) == 0) {
382 if (argv[2][0] == 'p') {
383 uint64_t addr, size;
384 int total = fdt_num_mem_rsv(working_fdt);
385 int j, err;
386 printf("index\t\t start\t\t size\n");
387 printf("-------------------------------"
388 "-----------------\n");
389 for (j = 0; j < total; j++) {
390 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
391 if (err < 0) {
392 printf("libfdt fdt_get_mem_rsv(): %s\n",
393 fdt_strerror(err));
394 return err;
395 }
396 printf(" %x\t%08x%08x\t%08x%08x\n", j,
397 (u32)(addr >> 32),
398 (u32)(addr & 0xffffffff),
399 (u32)(size >> 32),
400 (u32)(size & 0xffffffff));
401 }
402 } else if (argv[2][0] == 'a') {
403 uint64_t addr, size;
404 int err;
405 #ifdef CONFIG_SYS_64BIT_STRTOUL
406 addr = simple_strtoull(argv[3], NULL, 16);
407 size = simple_strtoull(argv[4], NULL, 16);
408 #else
409 addr = simple_strtoul(argv[3], NULL, 16);
410 size = simple_strtoul(argv[4], NULL, 16);
411 #endif
412 err = fdt_add_mem_rsv(working_fdt, addr, size);
413
414 if (err < 0) {
415 printf("libfdt fdt_add_mem_rsv(): %s\n",
416 fdt_strerror(err));
417 return err;
418 }
419 } else if (argv[2][0] == 'd') {
420 unsigned long idx = simple_strtoul(argv[3], NULL, 16);
421 int err = fdt_del_mem_rsv(working_fdt, idx);
422
423 if (err < 0) {
424 printf("libfdt fdt_del_mem_rsv(): %s\n",
425 fdt_strerror(err));
426 return err;
427 }
428 } else {
429 /* Unrecognized command */
430 printf ("Usage:\n%s\n", cmdtp->usage);
431 return 1;
432 }
433 }
434 #ifdef CONFIG_OF_BOARD_SETUP
435 /* Call the board-specific fixup routine */
436 else if (strncmp(argv[1], "boa", 3) == 0)
437 ft_board_setup(working_fdt, gd->bd);
438 #endif
439 /* Create a chosen node */
440 else if (argv[1][0] == 'c') {
441 unsigned long initrd_start = 0, initrd_end = 0;
442
443 if ((argc != 2) && (argc != 4)) {
444 printf ("Usage:\n%s\n", cmdtp->usage);
445 return 1;
446 }
447
448 if (argc == 4) {
449 initrd_start = simple_strtoul(argv[2], NULL, 16);
450 initrd_end = simple_strtoul(argv[3], NULL, 16);
451 }
452
453 fdt_chosen(working_fdt, 1);
454 fdt_initrd(working_fdt, initrd_start, initrd_end, 1);
455 }
456 /* resize the fdt */
457 else if (strncmp(argv[1], "re", 2) == 0) {
458 fdt_resize(working_fdt);
459 }
460 else {
461 /* Unrecognized command */
462 printf ("Usage:\n%s\n", cmdtp->usage);
463 return 1;
464 }
465
466 return 0;
467 }
468
469 /****************************************************************************/
470
471 static int fdt_valid(void)
472 {
473 int err;
474
475 if (working_fdt == NULL) {
476 printf ("The address of the fdt is invalid (NULL).\n");
477 return 0;
478 }
479
480 err = fdt_check_header(working_fdt);
481 if (err == 0)
482 return 1; /* valid */
483
484 if (err < 0) {
485 printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
486 /*
487 * Be more informative on bad version.
488 */
489 if (err == -FDT_ERR_BADVERSION) {
490 if (fdt_version(working_fdt) <
491 FDT_FIRST_SUPPORTED_VERSION) {
492 printf (" - too old, fdt %d < %d",
493 fdt_version(working_fdt),
494 FDT_FIRST_SUPPORTED_VERSION);
495 working_fdt = NULL;
496 }
497 if (fdt_last_comp_version(working_fdt) >
498 FDT_LAST_SUPPORTED_VERSION) {
499 printf (" - too new, fdt %d > %d",
500 fdt_version(working_fdt),
501 FDT_LAST_SUPPORTED_VERSION);
502 working_fdt = NULL;
503 }
504 return 0;
505 }
506 printf("\n");
507 return 0;
508 }
509 return 1;
510 }
511
512 /****************************************************************************/
513
514 /*
515 * Parse the user's input, partially heuristic. Valid formats:
516 * <0x00112233 4 05> - an array of cells. Numbers follow standard
517 * C conventions.
518 * [00 11 22 .. nn] - byte stream
519 * "string" - If the the value doesn't start with "<" or "[", it is
520 * treated as a string. Note that the quotes are
521 * stripped by the parser before we get the string.
522 * newval: An array of strings containing the new property as specified
523 * on the command line
524 * count: The number of strings in the array
525 * data: A bytestream to be placed in the property
526 * len: The length of the resulting bytestream
527 */
528 static int fdt_parse_prop(char **newval, int count, char *data, int *len)
529 {
530 char *cp; /* temporary char pointer */
531 char *newp; /* temporary newval char pointer */
532 unsigned long tmp; /* holds converted values */
533 int stridx = 0;
534
535 *len = 0;
536 newp = newval[0];
537
538 /* An array of cells */
539 if (*newp == '<') {
540 newp++;
541 while ((*newp != '>') && (stridx < count)) {
542 /*
543 * Keep searching until we find that last ">"
544 * That way users don't have to escape the spaces
545 */
546 if (*newp == '\0') {
547 newp = newval[++stridx];
548 continue;
549 }
550
551 cp = newp;
552 tmp = simple_strtoul(cp, &newp, 0);
553 *(uint32_t *)data = __cpu_to_be32(tmp);
554 data += 4;
555 *len += 4;
556
557 /* If the ptr didn't advance, something went wrong */
558 if ((newp - cp) <= 0) {
559 printf("Sorry, I could not convert \"%s\"\n",
560 cp);
561 return 1;
562 }
563
564 while (*newp == ' ')
565 newp++;
566 }
567
568 if (*newp != '>') {
569 printf("Unexpected character '%c'\n", *newp);
570 return 1;
571 }
572 } else if (*newp == '[') {
573 /*
574 * Byte stream. Convert the values.
575 */
576 newp++;
577 while ((*newp != ']') && (stridx < count)) {
578 tmp = simple_strtoul(newp, &newp, 16);
579 *data++ = tmp & 0xFF;
580 *len = *len + 1;
581 while (*newp == ' ')
582 newp++;
583 if (*newp != '\0')
584 newp = newval[++stridx];
585 }
586 if (*newp != ']') {
587 printf("Unexpected character '%c'\n", *newp);
588 return 1;
589 }
590 } else {
591 /*
592 * Assume it is a string. Copy it into our data area for
593 * convenience (including the terminating '\0').
594 */
595 while (stridx < count) {
596 *len = strlen(newp) + 1;
597 strcpy(data, newp);
598 newp = newval[++stridx];
599 }
600 }
601 return 0;
602 }
603
604 /****************************************************************************/
605
606 /*
607 * Heuristic to guess if this is a string or concatenated strings.
608 */
609
610 static int is_printable_string(const void *data, int len)
611 {
612 const char *s = data;
613
614 /* zero length is not */
615 if (len == 0)
616 return 0;
617
618 /* must terminate with zero */
619 if (s[len - 1] != '\0')
620 return 0;
621
622 /* printable or a null byte (concatenated strings) */
623 while (((*s == '\0') || isprint(*s)) && (len > 0)) {
624 /*
625 * If we see a null, there are three possibilities:
626 * 1) If len == 1, it is the end of the string, printable
627 * 2) Next character also a null, not printable.
628 * 3) Next character not a null, continue to check.
629 */
630 if (s[0] == '\0') {
631 if (len == 1)
632 return 1;
633 if (s[1] == '\0')
634 return 0;
635 }
636 s++;
637 len--;
638 }
639
640 /* Not the null termination, or not done yet: not printable */
641 if (*s != '\0' || (len != 0))
642 return 0;
643
644 return 1;
645 }
646
647
648 /*
649 * Print the property in the best format, a heuristic guess. Print as
650 * a string, concatenated strings, a byte, word, double word, or (if all
651 * else fails) it is printed as a stream of bytes.
652 */
653 static void print_data(const void *data, int len)
654 {
655 int j;
656
657 /* no data, don't print */
658 if (len == 0)
659 return;
660
661 /*
662 * It is a string, but it may have multiple strings (embedded '\0's).
663 */
664 if (is_printable_string(data, len)) {
665 puts("\"");
666 j = 0;
667 while (j < len) {
668 if (j > 0)
669 puts("\", \"");
670 puts(data);
671 j += strlen(data) + 1;
672 data += strlen(data) + 1;
673 }
674 puts("\"");
675 return;
676 }
677
678 if ((len %4) == 0) {
679 const u32 *p;
680
681 printf("<");
682 for (j = 0, p = data; j < len/4; j ++)
683 printf("0x%x%s", p[j], j < (len/4 - 1) ? " " : "");
684 printf(">");
685 } else { /* anything else... hexdump */
686 const u8 *s;
687
688 printf("[");
689 for (j = 0, s = data; j < len; j++)
690 printf("%02x%s", s[j], j < len - 1 ? " " : "");
691 printf("]");
692 }
693 }
694
695 /****************************************************************************/
696
697 /*
698 * Recursively print (a portion of) the working_fdt. The depth parameter
699 * determines how deeply nested the fdt is printed.
700 */
701 static int fdt_print(const char *pathp, char *prop, int depth)
702 {
703 static char tabs[MAX_LEVEL+1] =
704 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
705 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
706 const void *nodep; /* property node pointer */
707 int nodeoffset; /* node offset from libfdt */
708 int nextoffset; /* next node offset from libfdt */
709 uint32_t tag; /* tag */
710 int len; /* length of the property */
711 int level = 0; /* keep track of nesting level */
712 const struct fdt_property *fdt_prop;
713
714 nodeoffset = fdt_path_offset (working_fdt, pathp);
715 if (nodeoffset < 0) {
716 /*
717 * Not found or something else bad happened.
718 */
719 printf ("libfdt fdt_path_offset() returned %s\n",
720 fdt_strerror(nodeoffset));
721 return 1;
722 }
723 /*
724 * The user passed in a property as well as node path.
725 * Print only the given property and then return.
726 */
727 if (prop) {
728 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
729 if (len == 0) {
730 /* no property value */
731 printf("%s %s\n", pathp, prop);
732 return 0;
733 } else if (len > 0) {
734 printf("%s = ", prop);
735 print_data (nodep, len);
736 printf("\n");
737 return 0;
738 } else {
739 printf ("libfdt fdt_getprop(): %s\n",
740 fdt_strerror(len));
741 return 1;
742 }
743 }
744
745 /*
746 * The user passed in a node path and no property,
747 * print the node and all subnodes.
748 */
749 while(level >= 0) {
750 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
751 switch(tag) {
752 case FDT_BEGIN_NODE:
753 pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
754 if (level <= depth) {
755 if (pathp == NULL)
756 pathp = "/* NULL pointer error */";
757 if (*pathp == '\0')
758 pathp = "/"; /* root is nameless */
759 printf("%s%s {\n",
760 &tabs[MAX_LEVEL - level], pathp);
761 }
762 level++;
763 if (level >= MAX_LEVEL) {
764 printf("Nested too deep, aborting.\n");
765 return 1;
766 }
767 break;
768 case FDT_END_NODE:
769 level--;
770 if (level <= depth)
771 printf("%s};\n", &tabs[MAX_LEVEL - level]);
772 if (level == 0) {
773 level = -1; /* exit the loop */
774 }
775 break;
776 case FDT_PROP:
777 fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
778 sizeof(*fdt_prop));
779 pathp = fdt_string(working_fdt,
780 fdt32_to_cpu(fdt_prop->nameoff));
781 len = fdt32_to_cpu(fdt_prop->len);
782 nodep = fdt_prop->data;
783 if (len < 0) {
784 printf ("libfdt fdt_getprop(): %s\n",
785 fdt_strerror(len));
786 return 1;
787 } else if (len == 0) {
788 /* the property has no value */
789 if (level <= depth)
790 printf("%s%s;\n",
791 &tabs[MAX_LEVEL - level],
792 pathp);
793 } else {
794 if (level <= depth) {
795 printf("%s%s = ",
796 &tabs[MAX_LEVEL - level],
797 pathp);
798 print_data (nodep, len);
799 printf(";\n");
800 }
801 }
802 break;
803 case FDT_NOP:
804 printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
805 break;
806 case FDT_END:
807 return 1;
808 default:
809 if (level <= depth)
810 printf("Unknown tag 0x%08X\n", tag);
811 return 1;
812 }
813 nodeoffset = nextoffset;
814 }
815 return 0;
816 }
817
818 /********************************************************************/
819
820 U_BOOT_CMD(
821 fdt, 255, 0, do_fdt,
822 "fdt - flattened device tree utility commands\n",
823 "addr <addr> [<length>] - Set the fdt location to <addr>\n"
824 #ifdef CONFIG_OF_BOARD_SETUP
825 "fdt boardsetup - Do board-specific set up\n"
826 #endif
827 "fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
828 "fdt resize - Resize fdt to size + padding to 4k addr\n"
829 "fdt print <path> [<prop>] - Recursive print starting at <path>\n"
830 "fdt list <path> [<prop>] - Print one level starting at <path>\n"
831 "fdt set <path> <prop> [<val>] - Set <property> [to <val>]\n"
832 "fdt mknode <path> <node> - Create a new node after <path>\n"
833 "fdt rm <path> [<prop>] - Delete the node or <property>\n"
834 "fdt header - Display header info\n"
835 "fdt bootcpu <id> - Set boot cpuid\n"
836 "fdt memory <addr> <size> - Add/Update memory node\n"
837 "fdt rsvmem print - Show current mem reserves\n"
838 "fdt rsvmem add <addr> <size> - Add a mem reserve\n"
839 "fdt rsvmem delete <index> - Delete a mem reserves\n"
840 "fdt chosen [<start> <end>] - Add/update the /chosen branch in the tree\n"
841 " <start>/<end> - initrd start/end addr\n"
842 "NOTE: Dereference aliases by omiting the leading '/', "
843 "e.g. fdt print ethernet0.\n"
844 );
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