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Merge branch 'master' of git://git.denx.de/u-boot-net
[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 <libfdt.h>
33 #include <fdt_support.h>
34 #include <asm/io.h>
35
36 #define MAX_LEVEL 32 /* how deeply nested we will go */
37 #define SCRATCHPAD 1024 /* bytes of scratchpad memory */
38 #ifndef CONFIG_CMD_FDT_MAX_DUMP
39 #define CONFIG_CMD_FDT_MAX_DUMP 64
40 #endif
41
42 /*
43 * Global data (for the gd->bd)
44 */
45 DECLARE_GLOBAL_DATA_PTR;
46
47 static int fdt_valid(struct fdt_header **blobp);
48 static int fdt_parse_prop(char *const*newval, int count, char *data, int *len);
49 static int fdt_print(const char *pathp, char *prop, int depth);
50 static int is_printable_string(const void *data, int len);
51
52 /*
53 * The working_fdt points to our working flattened device tree.
54 */
55 struct fdt_header *working_fdt;
56
57 void set_working_fdt_addr(void *addr)
58 {
59 void *buf;
60
61 buf = map_sysmem((ulong)addr, 0);
62 working_fdt = buf;
63 setenv_addr("fdtaddr", addr);
64 }
65
66 /*
67 * Get a value from the fdt and format it to be set in the environment
68 */
69 static int fdt_value_setenv(const void *nodep, int len, const char *var)
70 {
71 if (is_printable_string(nodep, len))
72 setenv(var, (void *)nodep);
73 else if (len == 4) {
74 char buf[11];
75
76 sprintf(buf, "0x%08X", *(uint32_t *)nodep);
77 setenv(var, buf);
78 } else if (len%4 == 0 && len <= 20) {
79 /* Needed to print things like sha1 hashes. */
80 char buf[41];
81 int i;
82
83 for (i = 0; i < len; i += sizeof(unsigned int))
84 sprintf(buf + (i * 2), "%08x",
85 *(unsigned int *)(nodep + i));
86 setenv(var, buf);
87 } else {
88 printf("error: unprintable value\n");
89 return 1;
90 }
91 return 0;
92 }
93
94 /*
95 * Flattened Device Tree command, see the help for parameter definitions.
96 */
97 static int do_fdt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
98 {
99 if (argc < 2)
100 return CMD_RET_USAGE;
101
102 /*
103 * Set the address of the fdt
104 */
105 if (argv[1][0] == 'a') {
106 unsigned long addr;
107 int control = 0;
108 struct fdt_header *blob;
109 /*
110 * Set the address [and length] of the fdt.
111 */
112 argc -= 2;
113 argv += 2;
114 /* Temporary #ifdef - some archs don't have fdt_blob yet */
115 #ifdef CONFIG_OF_CONTROL
116 if (argc && !strcmp(*argv, "-c")) {
117 control = 1;
118 argc--;
119 argv++;
120 }
121 #endif
122 if (argc == 0) {
123 if (control)
124 blob = (struct fdt_header *)gd->fdt_blob;
125 else
126 blob = working_fdt;
127 if (!blob || !fdt_valid(&blob))
128 return 1;
129 printf("The address of the fdt is %#08lx\n",
130 control ? (ulong)blob :
131 getenv_hex("fdtaddr", 0));
132 return 0;
133 }
134
135 addr = simple_strtoul(argv[0], NULL, 16);
136 blob = map_sysmem(addr, 0);
137 if (!fdt_valid(&blob))
138 return 1;
139 if (control)
140 gd->fdt_blob = blob;
141 else
142 set_working_fdt_addr(blob);
143
144 if (argc >= 2) {
145 int len;
146 int err;
147 /*
148 * Optional new length
149 */
150 len = simple_strtoul(argv[1], NULL, 16);
151 if (len < fdt_totalsize(blob)) {
152 printf ("New length %d < existing length %d, "
153 "ignoring.\n",
154 len, fdt_totalsize(blob));
155 } else {
156 /*
157 * Open in place with a new length.
158 */
159 err = fdt_open_into(blob, blob, len);
160 if (err != 0) {
161 printf ("libfdt fdt_open_into(): %s\n",
162 fdt_strerror(err));
163 }
164 }
165 }
166
167 return CMD_RET_SUCCESS;
168 }
169
170 if (!working_fdt) {
171 puts(
172 "No FDT memory address configured. Please configure\n"
173 "the FDT address via \"fdt addr <address>\" command.\n"
174 "Aborting!\n");
175 return CMD_RET_FAILURE;
176 }
177
178 /*
179 * Move the working_fdt
180 */
181 if (strncmp(argv[1], "mo", 2) == 0) {
182 struct fdt_header *newaddr;
183 int len;
184 int err;
185
186 if (argc < 4)
187 return CMD_RET_USAGE;
188
189 /*
190 * Set the address and length of the fdt.
191 */
192 working_fdt = (struct fdt_header *)simple_strtoul(argv[2], NULL, 16);
193 if (!fdt_valid(&working_fdt))
194 return 1;
195
196 newaddr = (struct fdt_header *)simple_strtoul(argv[3],NULL,16);
197
198 /*
199 * If the user specifies a length, use that. Otherwise use the
200 * current length.
201 */
202 if (argc <= 4) {
203 len = fdt_totalsize(working_fdt);
204 } else {
205 len = simple_strtoul(argv[4], NULL, 16);
206 if (len < fdt_totalsize(working_fdt)) {
207 printf ("New length 0x%X < existing length "
208 "0x%X, aborting.\n",
209 len, fdt_totalsize(working_fdt));
210 return 1;
211 }
212 }
213
214 /*
215 * Copy to the new location.
216 */
217 err = fdt_open_into(working_fdt, newaddr, len);
218 if (err != 0) {
219 printf ("libfdt fdt_open_into(): %s\n",
220 fdt_strerror(err));
221 return 1;
222 }
223 working_fdt = newaddr;
224
225 /*
226 * Make a new node
227 */
228 } else if (strncmp(argv[1], "mk", 2) == 0) {
229 char *pathp; /* path */
230 char *nodep; /* new node to add */
231 int nodeoffset; /* node offset from libfdt */
232 int err;
233
234 /*
235 * Parameters: Node path, new node to be appended to the path.
236 */
237 if (argc < 4)
238 return CMD_RET_USAGE;
239
240 pathp = argv[2];
241 nodep = argv[3];
242
243 nodeoffset = fdt_path_offset (working_fdt, pathp);
244 if (nodeoffset < 0) {
245 /*
246 * Not found or something else bad happened.
247 */
248 printf ("libfdt fdt_path_offset() returned %s\n",
249 fdt_strerror(nodeoffset));
250 return 1;
251 }
252 err = fdt_add_subnode(working_fdt, nodeoffset, nodep);
253 if (err < 0) {
254 printf ("libfdt fdt_add_subnode(): %s\n",
255 fdt_strerror(err));
256 return 1;
257 }
258
259 /*
260 * Set the value of a property in the working_fdt.
261 */
262 } else if (argv[1][0] == 's') {
263 char *pathp; /* path */
264 char *prop; /* property */
265 int nodeoffset; /* node offset from libfdt */
266 static char data[SCRATCHPAD]; /* storage for the property */
267 int len; /* new length of the property */
268 int ret; /* return value */
269
270 /*
271 * Parameters: Node path, property, optional value.
272 */
273 if (argc < 4)
274 return CMD_RET_USAGE;
275
276 pathp = argv[2];
277 prop = argv[3];
278 if (argc == 4) {
279 len = 0;
280 } else {
281 ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
282 if (ret != 0)
283 return ret;
284 }
285
286 nodeoffset = fdt_path_offset (working_fdt, pathp);
287 if (nodeoffset < 0) {
288 /*
289 * Not found or something else bad happened.
290 */
291 printf ("libfdt fdt_path_offset() returned %s\n",
292 fdt_strerror(nodeoffset));
293 return 1;
294 }
295
296 ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
297 if (ret < 0) {
298 printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
299 return 1;
300 }
301
302 /********************************************************************
303 * Get the value of a property in the working_fdt.
304 ********************************************************************/
305 } else if (argv[1][0] == 'g') {
306 char *subcmd; /* sub-command */
307 char *pathp; /* path */
308 char *prop; /* property */
309 char *var; /* variable to store result */
310 int nodeoffset; /* node offset from libfdt */
311 const void *nodep; /* property node pointer */
312 int len = 0; /* new length of the property */
313
314 /*
315 * Parameters: Node path, property, optional value.
316 */
317 if (argc < 5)
318 return CMD_RET_USAGE;
319
320 subcmd = argv[2];
321
322 if (argc < 6 && subcmd[0] != 's')
323 return CMD_RET_USAGE;
324
325 var = argv[3];
326 pathp = argv[4];
327 prop = argv[5];
328
329 nodeoffset = fdt_path_offset(working_fdt, pathp);
330 if (nodeoffset < 0) {
331 /*
332 * Not found or something else bad happened.
333 */
334 printf("libfdt fdt_path_offset() returned %s\n",
335 fdt_strerror(nodeoffset));
336 return 1;
337 }
338
339 if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
340 int reqIndex = -1;
341 int startDepth = fdt_node_depth(
342 working_fdt, nodeoffset);
343 int curDepth = startDepth;
344 int curIndex = -1;
345 int nextNodeOffset = fdt_next_node(
346 working_fdt, nodeoffset, &curDepth);
347
348 if (subcmd[0] == 'n')
349 reqIndex = simple_strtoul(argv[5], NULL, 16);
350
351 while (curDepth > startDepth) {
352 if (curDepth == startDepth + 1)
353 curIndex++;
354 if (subcmd[0] == 'n' && curIndex == reqIndex) {
355 const char *nodeName = fdt_get_name(
356 working_fdt, nextNodeOffset, NULL);
357
358 setenv(var, (char *)nodeName);
359 return 0;
360 }
361 nextNodeOffset = fdt_next_node(
362 working_fdt, nextNodeOffset, &curDepth);
363 if (nextNodeOffset < 0)
364 break;
365 }
366 if (subcmd[0] == 's') {
367 /* get the num nodes at this level */
368 setenv_ulong(var, curIndex + 1);
369 } else {
370 /* node index not found */
371 printf("libfdt node not found\n");
372 return 1;
373 }
374 } else {
375 nodep = fdt_getprop(
376 working_fdt, nodeoffset, prop, &len);
377 if (len == 0) {
378 /* no property value */
379 setenv(var, "");
380 return 0;
381 } else if (len > 0) {
382 if (subcmd[0] == 'v') {
383 int ret;
384
385 ret = fdt_value_setenv(nodep, len, var);
386 if (ret != 0)
387 return ret;
388 } else if (subcmd[0] == 'a') {
389 /* Get address */
390 char buf[11];
391
392 sprintf(buf, "0x%p", nodep);
393 setenv(var, buf);
394 } else if (subcmd[0] == 's') {
395 /* Get size */
396 char buf[11];
397
398 sprintf(buf, "0x%08X", len);
399 setenv(var, buf);
400 } else
401 return CMD_RET_USAGE;
402 return 0;
403 } else {
404 printf("libfdt fdt_getprop(): %s\n",
405 fdt_strerror(len));
406 return 1;
407 }
408 }
409
410 /*
411 * Print (recursive) / List (single level)
412 */
413 } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
414 int depth = MAX_LEVEL; /* how deep to print */
415 char *pathp; /* path */
416 char *prop; /* property */
417 int ret; /* return value */
418 static char root[2] = "/";
419
420 /*
421 * list is an alias for print, but limited to 1 level
422 */
423 if (argv[1][0] == 'l') {
424 depth = 1;
425 }
426
427 /*
428 * Get the starting path. The root node is an oddball,
429 * the offset is zero and has no name.
430 */
431 if (argc == 2)
432 pathp = root;
433 else
434 pathp = argv[2];
435 if (argc > 3)
436 prop = argv[3];
437 else
438 prop = NULL;
439
440 ret = fdt_print(pathp, prop, depth);
441 if (ret != 0)
442 return ret;
443
444 /*
445 * Remove a property/node
446 */
447 } else if (strncmp(argv[1], "rm", 2) == 0) {
448 int nodeoffset; /* node offset from libfdt */
449 int err;
450
451 /*
452 * Get the path. The root node is an oddball, the offset
453 * is zero and has no name.
454 */
455 nodeoffset = fdt_path_offset (working_fdt, argv[2]);
456 if (nodeoffset < 0) {
457 /*
458 * Not found or something else bad happened.
459 */
460 printf ("libfdt fdt_path_offset() returned %s\n",
461 fdt_strerror(nodeoffset));
462 return 1;
463 }
464 /*
465 * Do the delete. A fourth parameter means delete a property,
466 * otherwise delete the node.
467 */
468 if (argc > 3) {
469 err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
470 if (err < 0) {
471 printf("libfdt fdt_delprop(): %s\n",
472 fdt_strerror(err));
473 return err;
474 }
475 } else {
476 err = fdt_del_node(working_fdt, nodeoffset);
477 if (err < 0) {
478 printf("libfdt fdt_del_node(): %s\n",
479 fdt_strerror(err));
480 return err;
481 }
482 }
483
484 /*
485 * Display header info
486 */
487 } else if (argv[1][0] == 'h') {
488 u32 version = fdt_version(working_fdt);
489 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
490 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
491 fdt_totalsize(working_fdt));
492 printf("off_dt_struct:\t\t0x%x\n",
493 fdt_off_dt_struct(working_fdt));
494 printf("off_dt_strings:\t\t0x%x\n",
495 fdt_off_dt_strings(working_fdt));
496 printf("off_mem_rsvmap:\t\t0x%x\n",
497 fdt_off_mem_rsvmap(working_fdt));
498 printf("version:\t\t%d\n", version);
499 printf("last_comp_version:\t%d\n",
500 fdt_last_comp_version(working_fdt));
501 if (version >= 2)
502 printf("boot_cpuid_phys:\t0x%x\n",
503 fdt_boot_cpuid_phys(working_fdt));
504 if (version >= 3)
505 printf("size_dt_strings:\t0x%x\n",
506 fdt_size_dt_strings(working_fdt));
507 if (version >= 17)
508 printf("size_dt_struct:\t\t0x%x\n",
509 fdt_size_dt_struct(working_fdt));
510 printf("number mem_rsv:\t\t0x%x\n",
511 fdt_num_mem_rsv(working_fdt));
512 printf("\n");
513
514 /*
515 * Set boot cpu id
516 */
517 } else if (strncmp(argv[1], "boo", 3) == 0) {
518 unsigned long tmp = simple_strtoul(argv[2], NULL, 16);
519 fdt_set_boot_cpuid_phys(working_fdt, tmp);
520
521 /*
522 * memory command
523 */
524 } else if (strncmp(argv[1], "me", 2) == 0) {
525 uint64_t addr, size;
526 int err;
527 addr = simple_strtoull(argv[2], NULL, 16);
528 size = simple_strtoull(argv[3], NULL, 16);
529 err = fdt_fixup_memory(working_fdt, addr, size);
530 if (err < 0)
531 return err;
532
533 /*
534 * mem reserve commands
535 */
536 } else if (strncmp(argv[1], "rs", 2) == 0) {
537 if (argv[2][0] == 'p') {
538 uint64_t addr, size;
539 int total = fdt_num_mem_rsv(working_fdt);
540 int j, err;
541 printf("index\t\t start\t\t size\n");
542 printf("-------------------------------"
543 "-----------------\n");
544 for (j = 0; j < total; j++) {
545 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
546 if (err < 0) {
547 printf("libfdt fdt_get_mem_rsv(): %s\n",
548 fdt_strerror(err));
549 return err;
550 }
551 printf(" %x\t%08x%08x\t%08x%08x\n", j,
552 (u32)(addr >> 32),
553 (u32)(addr & 0xffffffff),
554 (u32)(size >> 32),
555 (u32)(size & 0xffffffff));
556 }
557 } else if (argv[2][0] == 'a') {
558 uint64_t addr, size;
559 int err;
560 addr = simple_strtoull(argv[3], NULL, 16);
561 size = simple_strtoull(argv[4], NULL, 16);
562 err = fdt_add_mem_rsv(working_fdt, addr, size);
563
564 if (err < 0) {
565 printf("libfdt fdt_add_mem_rsv(): %s\n",
566 fdt_strerror(err));
567 return err;
568 }
569 } else if (argv[2][0] == 'd') {
570 unsigned long idx = simple_strtoul(argv[3], NULL, 16);
571 int err = fdt_del_mem_rsv(working_fdt, idx);
572
573 if (err < 0) {
574 printf("libfdt fdt_del_mem_rsv(): %s\n",
575 fdt_strerror(err));
576 return err;
577 }
578 } else {
579 /* Unrecognized command */
580 return CMD_RET_USAGE;
581 }
582 }
583 #ifdef CONFIG_OF_BOARD_SETUP
584 /* Call the board-specific fixup routine */
585 else if (strncmp(argv[1], "boa", 3) == 0)
586 ft_board_setup(working_fdt, gd->bd);
587 #endif
588 /* Create a chosen node */
589 else if (argv[1][0] == 'c') {
590 unsigned long initrd_start = 0, initrd_end = 0;
591
592 if ((argc != 2) && (argc != 4))
593 return CMD_RET_USAGE;
594
595 if (argc == 4) {
596 initrd_start = simple_strtoul(argv[2], NULL, 16);
597 initrd_end = simple_strtoul(argv[3], NULL, 16);
598 }
599
600 fdt_chosen(working_fdt, 1);
601 fdt_initrd(working_fdt, initrd_start, initrd_end, 1);
602 }
603 /* resize the fdt */
604 else if (strncmp(argv[1], "re", 2) == 0) {
605 fdt_resize(working_fdt);
606 }
607 else {
608 /* Unrecognized command */
609 return CMD_RET_USAGE;
610 }
611
612 return 0;
613 }
614
615 /****************************************************************************/
616
617 /**
618 * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
619 *
620 * @blobp: Pointer to FDT pointer
621 * @return 1 if OK, 0 if bad (in which case *blobp is set to NULL)
622 */
623 static int fdt_valid(struct fdt_header **blobp)
624 {
625 const void *blob = *blobp;
626 int err;
627
628 if (blob == NULL) {
629 printf ("The address of the fdt is invalid (NULL).\n");
630 return 0;
631 }
632
633 err = fdt_check_header(blob);
634 if (err == 0)
635 return 1; /* valid */
636
637 if (err < 0) {
638 printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
639 /*
640 * Be more informative on bad version.
641 */
642 if (err == -FDT_ERR_BADVERSION) {
643 if (fdt_version(blob) <
644 FDT_FIRST_SUPPORTED_VERSION) {
645 printf (" - too old, fdt %d < %d",
646 fdt_version(blob),
647 FDT_FIRST_SUPPORTED_VERSION);
648 }
649 if (fdt_last_comp_version(blob) >
650 FDT_LAST_SUPPORTED_VERSION) {
651 printf (" - too new, fdt %d > %d",
652 fdt_version(blob),
653 FDT_LAST_SUPPORTED_VERSION);
654 }
655 }
656 printf("\n");
657 *blobp = NULL;
658 return 0;
659 }
660 return 1;
661 }
662
663 /****************************************************************************/
664
665 /*
666 * Parse the user's input, partially heuristic. Valid formats:
667 * <0x00112233 4 05> - an array of cells. Numbers follow standard
668 * C conventions.
669 * [00 11 22 .. nn] - byte stream
670 * "string" - If the the value doesn't start with "<" or "[", it is
671 * treated as a string. Note that the quotes are
672 * stripped by the parser before we get the string.
673 * newval: An array of strings containing the new property as specified
674 * on the command line
675 * count: The number of strings in the array
676 * data: A bytestream to be placed in the property
677 * len: The length of the resulting bytestream
678 */
679 static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
680 {
681 char *cp; /* temporary char pointer */
682 char *newp; /* temporary newval char pointer */
683 unsigned long tmp; /* holds converted values */
684 int stridx = 0;
685
686 *len = 0;
687 newp = newval[0];
688
689 /* An array of cells */
690 if (*newp == '<') {
691 newp++;
692 while ((*newp != '>') && (stridx < count)) {
693 /*
694 * Keep searching until we find that last ">"
695 * That way users don't have to escape the spaces
696 */
697 if (*newp == '\0') {
698 newp = newval[++stridx];
699 continue;
700 }
701
702 cp = newp;
703 tmp = simple_strtoul(cp, &newp, 0);
704 *(__be32 *)data = __cpu_to_be32(tmp);
705 data += 4;
706 *len += 4;
707
708 /* If the ptr didn't advance, something went wrong */
709 if ((newp - cp) <= 0) {
710 printf("Sorry, I could not convert \"%s\"\n",
711 cp);
712 return 1;
713 }
714
715 while (*newp == ' ')
716 newp++;
717 }
718
719 if (*newp != '>') {
720 printf("Unexpected character '%c'\n", *newp);
721 return 1;
722 }
723 } else if (*newp == '[') {
724 /*
725 * Byte stream. Convert the values.
726 */
727 newp++;
728 while ((stridx < count) && (*newp != ']')) {
729 while (*newp == ' ')
730 newp++;
731 if (*newp == '\0') {
732 newp = newval[++stridx];
733 continue;
734 }
735 if (!isxdigit(*newp))
736 break;
737 tmp = simple_strtoul(newp, &newp, 16);
738 *data++ = tmp & 0xFF;
739 *len = *len + 1;
740 }
741 if (*newp != ']') {
742 printf("Unexpected character '%c'\n", *newp);
743 return 1;
744 }
745 } else {
746 /*
747 * Assume it is one or more strings. Copy it into our
748 * data area for convenience (including the
749 * terminating '\0's).
750 */
751 while (stridx < count) {
752 size_t length = strlen(newp) + 1;
753 strcpy(data, newp);
754 data += length;
755 *len += length;
756 newp = newval[++stridx];
757 }
758 }
759 return 0;
760 }
761
762 /****************************************************************************/
763
764 /*
765 * Heuristic to guess if this is a string or concatenated strings.
766 */
767
768 static int is_printable_string(const void *data, int len)
769 {
770 const char *s = data;
771
772 /* zero length is not */
773 if (len == 0)
774 return 0;
775
776 /* must terminate with zero or '\n' */
777 if (s[len - 1] != '\0' && s[len - 1] != '\n')
778 return 0;
779
780 /* printable or a null byte (concatenated strings) */
781 while (((*s == '\0') || isprint(*s) || isspace(*s)) && (len > 0)) {
782 /*
783 * If we see a null, there are three possibilities:
784 * 1) If len == 1, it is the end of the string, printable
785 * 2) Next character also a null, not printable.
786 * 3) Next character not a null, continue to check.
787 */
788 if (s[0] == '\0') {
789 if (len == 1)
790 return 1;
791 if (s[1] == '\0')
792 return 0;
793 }
794 s++;
795 len--;
796 }
797
798 /* Not the null termination, or not done yet: not printable */
799 if (*s != '\0' || (len != 0))
800 return 0;
801
802 return 1;
803 }
804
805
806 /*
807 * Print the property in the best format, a heuristic guess. Print as
808 * a string, concatenated strings, a byte, word, double word, or (if all
809 * else fails) it is printed as a stream of bytes.
810 */
811 static void print_data(const void *data, int len)
812 {
813 int j;
814
815 /* no data, don't print */
816 if (len == 0)
817 return;
818
819 /*
820 * It is a string, but it may have multiple strings (embedded '\0's).
821 */
822 if (is_printable_string(data, len)) {
823 puts("\"");
824 j = 0;
825 while (j < len) {
826 if (j > 0)
827 puts("\", \"");
828 puts(data);
829 j += strlen(data) + 1;
830 data += strlen(data) + 1;
831 }
832 puts("\"");
833 return;
834 }
835
836 if ((len %4) == 0) {
837 if (len > CONFIG_CMD_FDT_MAX_DUMP)
838 printf("* 0x%p [0x%08x]", data, len);
839 else {
840 const __be32 *p;
841
842 printf("<");
843 for (j = 0, p = data; j < len/4; j++)
844 printf("0x%08x%s", fdt32_to_cpu(p[j]),
845 j < (len/4 - 1) ? " " : "");
846 printf(">");
847 }
848 } else { /* anything else... hexdump */
849 if (len > CONFIG_CMD_FDT_MAX_DUMP)
850 printf("* 0x%p [0x%08x]", data, len);
851 else {
852 const u8 *s;
853
854 printf("[");
855 for (j = 0, s = data; j < len; j++)
856 printf("%02x%s", s[j], j < len - 1 ? " " : "");
857 printf("]");
858 }
859 }
860 }
861
862 /****************************************************************************/
863
864 /*
865 * Recursively print (a portion of) the working_fdt. The depth parameter
866 * determines how deeply nested the fdt is printed.
867 */
868 static int fdt_print(const char *pathp, char *prop, int depth)
869 {
870 static char tabs[MAX_LEVEL+1] =
871 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
872 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
873 const void *nodep; /* property node pointer */
874 int nodeoffset; /* node offset from libfdt */
875 int nextoffset; /* next node offset from libfdt */
876 uint32_t tag; /* tag */
877 int len; /* length of the property */
878 int level = 0; /* keep track of nesting level */
879 const struct fdt_property *fdt_prop;
880
881 nodeoffset = fdt_path_offset (working_fdt, pathp);
882 if (nodeoffset < 0) {
883 /*
884 * Not found or something else bad happened.
885 */
886 printf ("libfdt fdt_path_offset() returned %s\n",
887 fdt_strerror(nodeoffset));
888 return 1;
889 }
890 /*
891 * The user passed in a property as well as node path.
892 * Print only the given property and then return.
893 */
894 if (prop) {
895 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
896 if (len == 0) {
897 /* no property value */
898 printf("%s %s\n", pathp, prop);
899 return 0;
900 } else if (len > 0) {
901 printf("%s = ", prop);
902 print_data (nodep, len);
903 printf("\n");
904 return 0;
905 } else {
906 printf ("libfdt fdt_getprop(): %s\n",
907 fdt_strerror(len));
908 return 1;
909 }
910 }
911
912 /*
913 * The user passed in a node path and no property,
914 * print the node and all subnodes.
915 */
916 while(level >= 0) {
917 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
918 switch(tag) {
919 case FDT_BEGIN_NODE:
920 pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
921 if (level <= depth) {
922 if (pathp == NULL)
923 pathp = "/* NULL pointer error */";
924 if (*pathp == '\0')
925 pathp = "/"; /* root is nameless */
926 printf("%s%s {\n",
927 &tabs[MAX_LEVEL - level], pathp);
928 }
929 level++;
930 if (level >= MAX_LEVEL) {
931 printf("Nested too deep, aborting.\n");
932 return 1;
933 }
934 break;
935 case FDT_END_NODE:
936 level--;
937 if (level <= depth)
938 printf("%s};\n", &tabs[MAX_LEVEL - level]);
939 if (level == 0) {
940 level = -1; /* exit the loop */
941 }
942 break;
943 case FDT_PROP:
944 fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
945 sizeof(*fdt_prop));
946 pathp = fdt_string(working_fdt,
947 fdt32_to_cpu(fdt_prop->nameoff));
948 len = fdt32_to_cpu(fdt_prop->len);
949 nodep = fdt_prop->data;
950 if (len < 0) {
951 printf ("libfdt fdt_getprop(): %s\n",
952 fdt_strerror(len));
953 return 1;
954 } else if (len == 0) {
955 /* the property has no value */
956 if (level <= depth)
957 printf("%s%s;\n",
958 &tabs[MAX_LEVEL - level],
959 pathp);
960 } else {
961 if (level <= depth) {
962 printf("%s%s = ",
963 &tabs[MAX_LEVEL - level],
964 pathp);
965 print_data (nodep, len);
966 printf(";\n");
967 }
968 }
969 break;
970 case FDT_NOP:
971 printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
972 break;
973 case FDT_END:
974 return 1;
975 default:
976 if (level <= depth)
977 printf("Unknown tag 0x%08X\n", tag);
978 return 1;
979 }
980 nodeoffset = nextoffset;
981 }
982 return 0;
983 }
984
985 /********************************************************************/
986 #ifdef CONFIG_SYS_LONGHELP
987 static char fdt_help_text[] =
988 "addr [-c] <addr> [<length>] - Set the [control] fdt location to <addr>\n"
989 #ifdef CONFIG_OF_BOARD_SETUP
990 "fdt boardsetup - Do board-specific set up\n"
991 #endif
992 "fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
993 "fdt resize - Resize fdt to size + padding to 4k addr\n"
994 "fdt print <path> [<prop>] - Recursive print starting at <path>\n"
995 "fdt list <path> [<prop>] - Print one level starting at <path>\n"
996 "fdt get value <var> <path> <prop> - Get <property> and store in <var>\n"
997 "fdt get name <var> <path> <index> - Get name of node <index> and store in <var>\n"
998 "fdt get addr <var> <path> <prop> - Get start address of <property> and store in <var>\n"
999 "fdt get size <var> <path> [<prop>] - Get size of [<property>] or num nodes and store in <var>\n"
1000 "fdt set <path> <prop> [<val>] - Set <property> [to <val>]\n"
1001 "fdt mknode <path> <node> - Create a new node after <path>\n"
1002 "fdt rm <path> [<prop>] - Delete the node or <property>\n"
1003 "fdt header - Display header info\n"
1004 "fdt bootcpu <id> - Set boot cpuid\n"
1005 "fdt memory <addr> <size> - Add/Update memory node\n"
1006 "fdt rsvmem print - Show current mem reserves\n"
1007 "fdt rsvmem add <addr> <size> - Add a mem reserve\n"
1008 "fdt rsvmem delete <index> - Delete a mem reserves\n"
1009 "fdt chosen [<start> <end>] - Add/update the /chosen branch in the tree\n"
1010 " <start>/<end> - initrd start/end addr\n"
1011 "NOTE: Dereference aliases by omiting the leading '/', "
1012 "e.g. fdt print ethernet0.";
1013 #endif
1014
1015 U_BOOT_CMD(
1016 fdt, 255, 0, do_fdt,
1017 "flattened device tree utility commands", fdt_help_text
1018 );
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