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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 cmd_usage(cmdtp);
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 cmd_usage(cmdtp);
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 cmd_usage(cmdtp);
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 cmd_usage(cmdtp);
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 addr = simple_strtoull(argv[2], NULL, 16);
368 size = simple_strtoull(argv[3], NULL, 16);
369 err = fdt_fixup_memory(working_fdt, addr, size);
370 if (err < 0)
371 return err;
372
373 /********************************************************************
374 * mem reserve commands
375 ********************************************************************/
376 } else if (strncmp(argv[1], "rs", 2) == 0) {
377 if (argv[2][0] == 'p') {
378 uint64_t addr, size;
379 int total = fdt_num_mem_rsv(working_fdt);
380 int j, err;
381 printf("index\t\t start\t\t size\n");
382 printf("-------------------------------"
383 "-----------------\n");
384 for (j = 0; j < total; j++) {
385 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
386 if (err < 0) {
387 printf("libfdt fdt_get_mem_rsv(): %s\n",
388 fdt_strerror(err));
389 return err;
390 }
391 printf(" %x\t%08x%08x\t%08x%08x\n", j,
392 (u32)(addr >> 32),
393 (u32)(addr & 0xffffffff),
394 (u32)(size >> 32),
395 (u32)(size & 0xffffffff));
396 }
397 } else if (argv[2][0] == 'a') {
398 uint64_t addr, size;
399 int err;
400 addr = simple_strtoull(argv[3], NULL, 16);
401 size = simple_strtoull(argv[4], NULL, 16);
402 err = fdt_add_mem_rsv(working_fdt, addr, size);
403
404 if (err < 0) {
405 printf("libfdt fdt_add_mem_rsv(): %s\n",
406 fdt_strerror(err));
407 return err;
408 }
409 } else if (argv[2][0] == 'd') {
410 unsigned long idx = simple_strtoul(argv[3], NULL, 16);
411 int err = fdt_del_mem_rsv(working_fdt, idx);
412
413 if (err < 0) {
414 printf("libfdt fdt_del_mem_rsv(): %s\n",
415 fdt_strerror(err));
416 return err;
417 }
418 } else {
419 /* Unrecognized command */
420 cmd_usage(cmdtp);
421 return 1;
422 }
423 }
424 #ifdef CONFIG_OF_BOARD_SETUP
425 /* Call the board-specific fixup routine */
426 else if (strncmp(argv[1], "boa", 3) == 0)
427 ft_board_setup(working_fdt, gd->bd);
428 #endif
429 /* Create a chosen node */
430 else if (argv[1][0] == 'c') {
431 unsigned long initrd_start = 0, initrd_end = 0;
432
433 if ((argc != 2) && (argc != 4)) {
434 cmd_usage(cmdtp);
435 return 1;
436 }
437
438 if (argc == 4) {
439 initrd_start = simple_strtoul(argv[2], NULL, 16);
440 initrd_end = simple_strtoul(argv[3], NULL, 16);
441 }
442
443 fdt_chosen(working_fdt, 1);
444 fdt_initrd(working_fdt, initrd_start, initrd_end, 1);
445 }
446 /* resize the fdt */
447 else if (strncmp(argv[1], "re", 2) == 0) {
448 fdt_resize(working_fdt);
449 }
450 else {
451 /* Unrecognized command */
452 cmd_usage(cmdtp);
453 return 1;
454 }
455
456 return 0;
457 }
458
459 /****************************************************************************/
460
461 static int fdt_valid(void)
462 {
463 int err;
464
465 if (working_fdt == NULL) {
466 printf ("The address of the fdt is invalid (NULL).\n");
467 return 0;
468 }
469
470 err = fdt_check_header(working_fdt);
471 if (err == 0)
472 return 1; /* valid */
473
474 if (err < 0) {
475 printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
476 /*
477 * Be more informative on bad version.
478 */
479 if (err == -FDT_ERR_BADVERSION) {
480 if (fdt_version(working_fdt) <
481 FDT_FIRST_SUPPORTED_VERSION) {
482 printf (" - too old, fdt %d < %d",
483 fdt_version(working_fdt),
484 FDT_FIRST_SUPPORTED_VERSION);
485 working_fdt = NULL;
486 }
487 if (fdt_last_comp_version(working_fdt) >
488 FDT_LAST_SUPPORTED_VERSION) {
489 printf (" - too new, fdt %d > %d",
490 fdt_version(working_fdt),
491 FDT_LAST_SUPPORTED_VERSION);
492 working_fdt = NULL;
493 }
494 return 0;
495 }
496 printf("\n");
497 return 0;
498 }
499 return 1;
500 }
501
502 /****************************************************************************/
503
504 /*
505 * Parse the user's input, partially heuristic. Valid formats:
506 * <0x00112233 4 05> - an array of cells. Numbers follow standard
507 * C conventions.
508 * [00 11 22 .. nn] - byte stream
509 * "string" - If the the value doesn't start with "<" or "[", it is
510 * treated as a string. Note that the quotes are
511 * stripped by the parser before we get the string.
512 * newval: An array of strings containing the new property as specified
513 * on the command line
514 * count: The number of strings in the array
515 * data: A bytestream to be placed in the property
516 * len: The length of the resulting bytestream
517 */
518 static int fdt_parse_prop(char **newval, int count, char *data, int *len)
519 {
520 char *cp; /* temporary char pointer */
521 char *newp; /* temporary newval char pointer */
522 unsigned long tmp; /* holds converted values */
523 int stridx = 0;
524
525 *len = 0;
526 newp = newval[0];
527
528 /* An array of cells */
529 if (*newp == '<') {
530 newp++;
531 while ((*newp != '>') && (stridx < count)) {
532 /*
533 * Keep searching until we find that last ">"
534 * That way users don't have to escape the spaces
535 */
536 if (*newp == '\0') {
537 newp = newval[++stridx];
538 continue;
539 }
540
541 cp = newp;
542 tmp = simple_strtoul(cp, &newp, 0);
543 *(uint32_t *)data = __cpu_to_be32(tmp);
544 data += 4;
545 *len += 4;
546
547 /* If the ptr didn't advance, something went wrong */
548 if ((newp - cp) <= 0) {
549 printf("Sorry, I could not convert \"%s\"\n",
550 cp);
551 return 1;
552 }
553
554 while (*newp == ' ')
555 newp++;
556 }
557
558 if (*newp != '>') {
559 printf("Unexpected character '%c'\n", *newp);
560 return 1;
561 }
562 } else if (*newp == '[') {
563 /*
564 * Byte stream. Convert the values.
565 */
566 newp++;
567 while ((stridx < count) && (*newp != ']')) {
568 while (*newp == ' ')
569 newp++;
570 if (*newp == '\0') {
571 newp = newval[++stridx];
572 continue;
573 }
574 if (!isxdigit(*newp))
575 break;
576 tmp = simple_strtoul(newp, &newp, 16);
577 *data++ = tmp & 0xFF;
578 *len = *len + 1;
579 }
580 if (*newp != ']') {
581 printf("Unexpected character '%c'\n", *newp);
582 return 1;
583 }
584 } else {
585 /*
586 * Assume it is one or more strings. Copy it into our
587 * data area for convenience (including the
588 * terminating '\0's).
589 */
590 while (stridx < count) {
591 size_t length = strlen(newp) + 1;
592 strcpy(data, newp);
593 data += length;
594 *len += length;
595 newp = newval[++stridx];
596 }
597 }
598 return 0;
599 }
600
601 /****************************************************************************/
602
603 /*
604 * Heuristic to guess if this is a string or concatenated strings.
605 */
606
607 static int is_printable_string(const void *data, int len)
608 {
609 const char *s = data;
610
611 /* zero length is not */
612 if (len == 0)
613 return 0;
614
615 /* must terminate with zero */
616 if (s[len - 1] != '\0')
617 return 0;
618
619 /* printable or a null byte (concatenated strings) */
620 while (((*s == '\0') || isprint(*s)) && (len > 0)) {
621 /*
622 * If we see a null, there are three possibilities:
623 * 1) If len == 1, it is the end of the string, printable
624 * 2) Next character also a null, not printable.
625 * 3) Next character not a null, continue to check.
626 */
627 if (s[0] == '\0') {
628 if (len == 1)
629 return 1;
630 if (s[1] == '\0')
631 return 0;
632 }
633 s++;
634 len--;
635 }
636
637 /* Not the null termination, or not done yet: not printable */
638 if (*s != '\0' || (len != 0))
639 return 0;
640
641 return 1;
642 }
643
644
645 /*
646 * Print the property in the best format, a heuristic guess. Print as
647 * a string, concatenated strings, a byte, word, double word, or (if all
648 * else fails) it is printed as a stream of bytes.
649 */
650 static void print_data(const void *data, int len)
651 {
652 int j;
653
654 /* no data, don't print */
655 if (len == 0)
656 return;
657
658 /*
659 * It is a string, but it may have multiple strings (embedded '\0's).
660 */
661 if (is_printable_string(data, len)) {
662 puts("\"");
663 j = 0;
664 while (j < len) {
665 if (j > 0)
666 puts("\", \"");
667 puts(data);
668 j += strlen(data) + 1;
669 data += strlen(data) + 1;
670 }
671 puts("\"");
672 return;
673 }
674
675 if ((len %4) == 0) {
676 const u32 *p;
677
678 printf("<");
679 for (j = 0, p = data; j < len/4; j ++)
680 printf("0x%x%s", p[j], j < (len/4 - 1) ? " " : "");
681 printf(">");
682 } else { /* anything else... hexdump */
683 const u8 *s;
684
685 printf("[");
686 for (j = 0, s = data; j < len; j++)
687 printf("%02x%s", s[j], j < len - 1 ? " " : "");
688 printf("]");
689 }
690 }
691
692 /****************************************************************************/
693
694 /*
695 * Recursively print (a portion of) the working_fdt. The depth parameter
696 * determines how deeply nested the fdt is printed.
697 */
698 static int fdt_print(const char *pathp, char *prop, int depth)
699 {
700 static char tabs[MAX_LEVEL+1] =
701 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
702 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
703 const void *nodep; /* property node pointer */
704 int nodeoffset; /* node offset from libfdt */
705 int nextoffset; /* next node offset from libfdt */
706 uint32_t tag; /* tag */
707 int len; /* length of the property */
708 int level = 0; /* keep track of nesting level */
709 const struct fdt_property *fdt_prop;
710
711 nodeoffset = fdt_path_offset (working_fdt, pathp);
712 if (nodeoffset < 0) {
713 /*
714 * Not found or something else bad happened.
715 */
716 printf ("libfdt fdt_path_offset() returned %s\n",
717 fdt_strerror(nodeoffset));
718 return 1;
719 }
720 /*
721 * The user passed in a property as well as node path.
722 * Print only the given property and then return.
723 */
724 if (prop) {
725 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
726 if (len == 0) {
727 /* no property value */
728 printf("%s %s\n", pathp, prop);
729 return 0;
730 } else if (len > 0) {
731 printf("%s = ", prop);
732 print_data (nodep, len);
733 printf("\n");
734 return 0;
735 } else {
736 printf ("libfdt fdt_getprop(): %s\n",
737 fdt_strerror(len));
738 return 1;
739 }
740 }
741
742 /*
743 * The user passed in a node path and no property,
744 * print the node and all subnodes.
745 */
746 while(level >= 0) {
747 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
748 switch(tag) {
749 case FDT_BEGIN_NODE:
750 pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
751 if (level <= depth) {
752 if (pathp == NULL)
753 pathp = "/* NULL pointer error */";
754 if (*pathp == '\0')
755 pathp = "/"; /* root is nameless */
756 printf("%s%s {\n",
757 &tabs[MAX_LEVEL - level], pathp);
758 }
759 level++;
760 if (level >= MAX_LEVEL) {
761 printf("Nested too deep, aborting.\n");
762 return 1;
763 }
764 break;
765 case FDT_END_NODE:
766 level--;
767 if (level <= depth)
768 printf("%s};\n", &tabs[MAX_LEVEL - level]);
769 if (level == 0) {
770 level = -1; /* exit the loop */
771 }
772 break;
773 case FDT_PROP:
774 fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
775 sizeof(*fdt_prop));
776 pathp = fdt_string(working_fdt,
777 fdt32_to_cpu(fdt_prop->nameoff));
778 len = fdt32_to_cpu(fdt_prop->len);
779 nodep = fdt_prop->data;
780 if (len < 0) {
781 printf ("libfdt fdt_getprop(): %s\n",
782 fdt_strerror(len));
783 return 1;
784 } else if (len == 0) {
785 /* the property has no value */
786 if (level <= depth)
787 printf("%s%s;\n",
788 &tabs[MAX_LEVEL - level],
789 pathp);
790 } else {
791 if (level <= depth) {
792 printf("%s%s = ",
793 &tabs[MAX_LEVEL - level],
794 pathp);
795 print_data (nodep, len);
796 printf(";\n");
797 }
798 }
799 break;
800 case FDT_NOP:
801 printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
802 break;
803 case FDT_END:
804 return 1;
805 default:
806 if (level <= depth)
807 printf("Unknown tag 0x%08X\n", tag);
808 return 1;
809 }
810 nodeoffset = nextoffset;
811 }
812 return 0;
813 }
814
815 /********************************************************************/
816
817 U_BOOT_CMD(
818 fdt, 255, 0, do_fdt,
819 "flattened device tree utility commands",
820 "addr <addr> [<length>] - Set the fdt location to <addr>\n"
821 #ifdef CONFIG_OF_BOARD_SETUP
822 "fdt boardsetup - Do board-specific set up\n"
823 #endif
824 "fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
825 "fdt resize - Resize fdt to size + padding to 4k addr\n"
826 "fdt print <path> [<prop>] - Recursive print starting at <path>\n"
827 "fdt list <path> [<prop>] - Print one level starting at <path>\n"
828 "fdt set <path> <prop> [<val>] - Set <property> [to <val>]\n"
829 "fdt mknode <path> <node> - Create a new node after <path>\n"
830 "fdt rm <path> [<prop>] - Delete the node or <property>\n"
831 "fdt header - Display header info\n"
832 "fdt bootcpu <id> - Set boot cpuid\n"
833 "fdt memory <addr> <size> - Add/Update memory node\n"
834 "fdt rsvmem print - Show current mem reserves\n"
835 "fdt rsvmem add <addr> <size> - Add a mem reserve\n"
836 "fdt rsvmem delete <index> - Delete a mem reserves\n"
837 "fdt chosen [<start> <end>] - Add/update the /chosen branch in the tree\n"
838 " <start>/<end> - initrd start/end addr\n"
839 "NOTE: Dereference aliases by omiting the leading '/', "
840 "e.g. fdt print ethernet0."
841 );
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