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cmd/fdt: add possibilty to have 'extrasize' on fdt resize
[people/ms/u-boot.git] / 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 * SPDX-License-Identifier: GPL-2.0+
9 */
10
11 #include <common.h>
12 #include <command.h>
13 #include <linux/ctype.h>
14 #include <linux/types.h>
15 #include <asm/global_data.h>
16 #include <libfdt.h>
17 #include <fdt_support.h>
18 #include <mapmem.h>
19 #include <asm/io.h>
20
21 #define MAX_LEVEL 32 /* how deeply nested we will go */
22 #define SCRATCHPAD 1024 /* bytes of scratchpad memory */
23 #ifndef CONFIG_CMD_FDT_MAX_DUMP
24 #define CONFIG_CMD_FDT_MAX_DUMP 64
25 #endif
26
27 /*
28 * Global data (for the gd->bd)
29 */
30 DECLARE_GLOBAL_DATA_PTR;
31
32 static int fdt_valid(struct fdt_header **blobp);
33 static int fdt_parse_prop(char *const*newval, int count, char *data, int *len);
34 static int fdt_print(const char *pathp, char *prop, int depth);
35 static int is_printable_string(const void *data, int len);
36
37 /*
38 * The working_fdt points to our working flattened device tree.
39 */
40 struct fdt_header *working_fdt;
41
42 void set_working_fdt_addr(ulong addr)
43 {
44 void *buf;
45
46 buf = map_sysmem(addr, 0);
47 working_fdt = buf;
48 setenv_hex("fdtaddr", addr);
49 }
50
51 /*
52 * Get a value from the fdt and format it to be set in the environment
53 */
54 static int fdt_value_setenv(const void *nodep, int len, const char *var)
55 {
56 if (is_printable_string(nodep, len))
57 setenv(var, (void *)nodep);
58 else if (len == 4) {
59 char buf[11];
60
61 sprintf(buf, "0x%08X", *(uint32_t *)nodep);
62 setenv(var, buf);
63 } else if (len%4 == 0 && len <= 20) {
64 /* Needed to print things like sha1 hashes. */
65 char buf[41];
66 int i;
67
68 for (i = 0; i < len; i += sizeof(unsigned int))
69 sprintf(buf + (i * 2), "%08x",
70 *(unsigned int *)(nodep + i));
71 setenv(var, buf);
72 } else {
73 printf("error: unprintable value\n");
74 return 1;
75 }
76 return 0;
77 }
78
79 /*
80 * Flattened Device Tree command, see the help for parameter definitions.
81 */
82 static int do_fdt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
83 {
84 if (argc < 2)
85 return CMD_RET_USAGE;
86
87 /*
88 * Set the address of the fdt
89 */
90 if (strncmp(argv[1], "ad", 2) == 0) {
91 unsigned long addr;
92 int control = 0;
93 struct fdt_header *blob;
94 /*
95 * Set the address [and length] of the fdt.
96 */
97 argc -= 2;
98 argv += 2;
99 /* Temporary #ifdef - some archs don't have fdt_blob yet */
100 #ifdef CONFIG_OF_CONTROL
101 if (argc && !strcmp(*argv, "-c")) {
102 control = 1;
103 argc--;
104 argv++;
105 }
106 #endif
107 if (argc == 0) {
108 if (control)
109 blob = (struct fdt_header *)gd->fdt_blob;
110 else
111 blob = working_fdt;
112 if (!blob || !fdt_valid(&blob))
113 return 1;
114 printf("The address of the fdt is %#08lx\n",
115 control ? (ulong)map_to_sysmem(blob) :
116 getenv_hex("fdtaddr", 0));
117 return 0;
118 }
119
120 addr = simple_strtoul(argv[0], NULL, 16);
121 blob = map_sysmem(addr, 0);
122 if (!fdt_valid(&blob))
123 return 1;
124 if (control)
125 gd->fdt_blob = blob;
126 else
127 set_working_fdt_addr(addr);
128
129 if (argc >= 2) {
130 int len;
131 int err;
132 /*
133 * Optional new length
134 */
135 len = simple_strtoul(argv[1], NULL, 16);
136 if (len < fdt_totalsize(blob)) {
137 printf ("New length %d < existing length %d, "
138 "ignoring.\n",
139 len, fdt_totalsize(blob));
140 } else {
141 /*
142 * Open in place with a new length.
143 */
144 err = fdt_open_into(blob, blob, len);
145 if (err != 0) {
146 printf ("libfdt fdt_open_into(): %s\n",
147 fdt_strerror(err));
148 }
149 }
150 }
151
152 return CMD_RET_SUCCESS;
153 }
154
155 if (!working_fdt) {
156 puts(
157 "No FDT memory address configured. Please configure\n"
158 "the FDT address via \"fdt addr <address>\" command.\n"
159 "Aborting!\n");
160 return CMD_RET_FAILURE;
161 }
162
163 /*
164 * Move the working_fdt
165 */
166 if (strncmp(argv[1], "mo", 2) == 0) {
167 struct fdt_header *newaddr;
168 int len;
169 int err;
170
171 if (argc < 4)
172 return CMD_RET_USAGE;
173
174 /*
175 * Set the address and length of the fdt.
176 */
177 working_fdt = (struct fdt_header *)simple_strtoul(argv[2], NULL, 16);
178 if (!fdt_valid(&working_fdt))
179 return 1;
180
181 newaddr = (struct fdt_header *)simple_strtoul(argv[3],NULL,16);
182
183 /*
184 * If the user specifies a length, use that. Otherwise use the
185 * current length.
186 */
187 if (argc <= 4) {
188 len = fdt_totalsize(working_fdt);
189 } else {
190 len = simple_strtoul(argv[4], NULL, 16);
191 if (len < fdt_totalsize(working_fdt)) {
192 printf ("New length 0x%X < existing length "
193 "0x%X, aborting.\n",
194 len, fdt_totalsize(working_fdt));
195 return 1;
196 }
197 }
198
199 /*
200 * Copy to the new location.
201 */
202 err = fdt_open_into(working_fdt, newaddr, len);
203 if (err != 0) {
204 printf ("libfdt fdt_open_into(): %s\n",
205 fdt_strerror(err));
206 return 1;
207 }
208 working_fdt = newaddr;
209
210 /*
211 * Make a new node
212 */
213 } else if (strncmp(argv[1], "mk", 2) == 0) {
214 char *pathp; /* path */
215 char *nodep; /* new node to add */
216 int nodeoffset; /* node offset from libfdt */
217 int err;
218
219 /*
220 * Parameters: Node path, new node to be appended to the path.
221 */
222 if (argc < 4)
223 return CMD_RET_USAGE;
224
225 pathp = argv[2];
226 nodep = argv[3];
227
228 nodeoffset = fdt_path_offset (working_fdt, pathp);
229 if (nodeoffset < 0) {
230 /*
231 * Not found or something else bad happened.
232 */
233 printf ("libfdt fdt_path_offset() returned %s\n",
234 fdt_strerror(nodeoffset));
235 return 1;
236 }
237 err = fdt_add_subnode(working_fdt, nodeoffset, nodep);
238 if (err < 0) {
239 printf ("libfdt fdt_add_subnode(): %s\n",
240 fdt_strerror(err));
241 return 1;
242 }
243
244 /*
245 * Set the value of a property in the working_fdt.
246 */
247 } else if (argv[1][0] == 's') {
248 char *pathp; /* path */
249 char *prop; /* property */
250 int nodeoffset; /* node offset from libfdt */
251 static char data[SCRATCHPAD]; /* storage for the property */
252 int len; /* new length of the property */
253 int ret; /* return value */
254
255 /*
256 * Parameters: Node path, property, optional value.
257 */
258 if (argc < 4)
259 return CMD_RET_USAGE;
260
261 pathp = argv[2];
262 prop = argv[3];
263 if (argc == 4) {
264 len = 0;
265 } else {
266 ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
267 if (ret != 0)
268 return ret;
269 }
270
271 nodeoffset = fdt_path_offset (working_fdt, pathp);
272 if (nodeoffset < 0) {
273 /*
274 * Not found or something else bad happened.
275 */
276 printf ("libfdt fdt_path_offset() returned %s\n",
277 fdt_strerror(nodeoffset));
278 return 1;
279 }
280
281 ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
282 if (ret < 0) {
283 printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
284 return 1;
285 }
286
287 /********************************************************************
288 * Get the value of a property in the working_fdt.
289 ********************************************************************/
290 } else if (argv[1][0] == 'g') {
291 char *subcmd; /* sub-command */
292 char *pathp; /* path */
293 char *prop; /* property */
294 char *var; /* variable to store result */
295 int nodeoffset; /* node offset from libfdt */
296 const void *nodep; /* property node pointer */
297 int len = 0; /* new length of the property */
298
299 /*
300 * Parameters: Node path, property, optional value.
301 */
302 if (argc < 5)
303 return CMD_RET_USAGE;
304
305 subcmd = argv[2];
306
307 if (argc < 6 && subcmd[0] != 's')
308 return CMD_RET_USAGE;
309
310 var = argv[3];
311 pathp = argv[4];
312 prop = argv[5];
313
314 nodeoffset = fdt_path_offset(working_fdt, pathp);
315 if (nodeoffset < 0) {
316 /*
317 * Not found or something else bad happened.
318 */
319 printf("libfdt fdt_path_offset() returned %s\n",
320 fdt_strerror(nodeoffset));
321 return 1;
322 }
323
324 if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
325 int reqIndex = -1;
326 int startDepth = fdt_node_depth(
327 working_fdt, nodeoffset);
328 int curDepth = startDepth;
329 int curIndex = -1;
330 int nextNodeOffset = fdt_next_node(
331 working_fdt, nodeoffset, &curDepth);
332
333 if (subcmd[0] == 'n')
334 reqIndex = simple_strtoul(argv[5], NULL, 16);
335
336 while (curDepth > startDepth) {
337 if (curDepth == startDepth + 1)
338 curIndex++;
339 if (subcmd[0] == 'n' && curIndex == reqIndex) {
340 const char *nodeName = fdt_get_name(
341 working_fdt, nextNodeOffset, NULL);
342
343 setenv(var, (char *)nodeName);
344 return 0;
345 }
346 nextNodeOffset = fdt_next_node(
347 working_fdt, nextNodeOffset, &curDepth);
348 if (nextNodeOffset < 0)
349 break;
350 }
351 if (subcmd[0] == 's') {
352 /* get the num nodes at this level */
353 setenv_ulong(var, curIndex + 1);
354 } else {
355 /* node index not found */
356 printf("libfdt node not found\n");
357 return 1;
358 }
359 } else {
360 nodep = fdt_getprop(
361 working_fdt, nodeoffset, prop, &len);
362 if (len == 0) {
363 /* no property value */
364 setenv(var, "");
365 return 0;
366 } else if (len > 0) {
367 if (subcmd[0] == 'v') {
368 int ret;
369
370 ret = fdt_value_setenv(nodep, len, var);
371 if (ret != 0)
372 return ret;
373 } else if (subcmd[0] == 'a') {
374 /* Get address */
375 char buf[11];
376
377 sprintf(buf, "0x%p", nodep);
378 setenv(var, buf);
379 } else if (subcmd[0] == 's') {
380 /* Get size */
381 char buf[11];
382
383 sprintf(buf, "0x%08X", len);
384 setenv(var, buf);
385 } else
386 return CMD_RET_USAGE;
387 return 0;
388 } else {
389 printf("libfdt fdt_getprop(): %s\n",
390 fdt_strerror(len));
391 return 1;
392 }
393 }
394
395 /*
396 * Print (recursive) / List (single level)
397 */
398 } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
399 int depth = MAX_LEVEL; /* how deep to print */
400 char *pathp; /* path */
401 char *prop; /* property */
402 int ret; /* return value */
403 static char root[2] = "/";
404
405 /*
406 * list is an alias for print, but limited to 1 level
407 */
408 if (argv[1][0] == 'l') {
409 depth = 1;
410 }
411
412 /*
413 * Get the starting path. The root node is an oddball,
414 * the offset is zero and has no name.
415 */
416 if (argc == 2)
417 pathp = root;
418 else
419 pathp = argv[2];
420 if (argc > 3)
421 prop = argv[3];
422 else
423 prop = NULL;
424
425 ret = fdt_print(pathp, prop, depth);
426 if (ret != 0)
427 return ret;
428
429 /*
430 * Remove a property/node
431 */
432 } else if (strncmp(argv[1], "rm", 2) == 0) {
433 int nodeoffset; /* node offset from libfdt */
434 int err;
435
436 /*
437 * Get the path. The root node is an oddball, the offset
438 * is zero and has no name.
439 */
440 nodeoffset = fdt_path_offset (working_fdt, argv[2]);
441 if (nodeoffset < 0) {
442 /*
443 * Not found or something else bad happened.
444 */
445 printf ("libfdt fdt_path_offset() returned %s\n",
446 fdt_strerror(nodeoffset));
447 return 1;
448 }
449 /*
450 * Do the delete. A fourth parameter means delete a property,
451 * otherwise delete the node.
452 */
453 if (argc > 3) {
454 err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
455 if (err < 0) {
456 printf("libfdt fdt_delprop(): %s\n",
457 fdt_strerror(err));
458 return err;
459 }
460 } else {
461 err = fdt_del_node(working_fdt, nodeoffset);
462 if (err < 0) {
463 printf("libfdt fdt_del_node(): %s\n",
464 fdt_strerror(err));
465 return err;
466 }
467 }
468
469 /*
470 * Display header info
471 */
472 } else if (argv[1][0] == 'h') {
473 u32 version = fdt_version(working_fdt);
474 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
475 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
476 fdt_totalsize(working_fdt));
477 printf("off_dt_struct:\t\t0x%x\n",
478 fdt_off_dt_struct(working_fdt));
479 printf("off_dt_strings:\t\t0x%x\n",
480 fdt_off_dt_strings(working_fdt));
481 printf("off_mem_rsvmap:\t\t0x%x\n",
482 fdt_off_mem_rsvmap(working_fdt));
483 printf("version:\t\t%d\n", version);
484 printf("last_comp_version:\t%d\n",
485 fdt_last_comp_version(working_fdt));
486 if (version >= 2)
487 printf("boot_cpuid_phys:\t0x%x\n",
488 fdt_boot_cpuid_phys(working_fdt));
489 if (version >= 3)
490 printf("size_dt_strings:\t0x%x\n",
491 fdt_size_dt_strings(working_fdt));
492 if (version >= 17)
493 printf("size_dt_struct:\t\t0x%x\n",
494 fdt_size_dt_struct(working_fdt));
495 printf("number mem_rsv:\t\t0x%x\n",
496 fdt_num_mem_rsv(working_fdt));
497 printf("\n");
498
499 /*
500 * Set boot cpu id
501 */
502 } else if (strncmp(argv[1], "boo", 3) == 0) {
503 unsigned long tmp = simple_strtoul(argv[2], NULL, 16);
504 fdt_set_boot_cpuid_phys(working_fdt, tmp);
505
506 /*
507 * memory command
508 */
509 } else if (strncmp(argv[1], "me", 2) == 0) {
510 uint64_t addr, size;
511 int err;
512 addr = simple_strtoull(argv[2], NULL, 16);
513 size = simple_strtoull(argv[3], NULL, 16);
514 err = fdt_fixup_memory(working_fdt, addr, size);
515 if (err < 0)
516 return err;
517
518 /*
519 * mem reserve commands
520 */
521 } else if (strncmp(argv[1], "rs", 2) == 0) {
522 if (argv[2][0] == 'p') {
523 uint64_t addr, size;
524 int total = fdt_num_mem_rsv(working_fdt);
525 int j, err;
526 printf("index\t\t start\t\t size\n");
527 printf("-------------------------------"
528 "-----------------\n");
529 for (j = 0; j < total; j++) {
530 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
531 if (err < 0) {
532 printf("libfdt fdt_get_mem_rsv(): %s\n",
533 fdt_strerror(err));
534 return err;
535 }
536 printf(" %x\t%08x%08x\t%08x%08x\n", j,
537 (u32)(addr >> 32),
538 (u32)(addr & 0xffffffff),
539 (u32)(size >> 32),
540 (u32)(size & 0xffffffff));
541 }
542 } else if (argv[2][0] == 'a') {
543 uint64_t addr, size;
544 int err;
545 addr = simple_strtoull(argv[3], NULL, 16);
546 size = simple_strtoull(argv[4], NULL, 16);
547 err = fdt_add_mem_rsv(working_fdt, addr, size);
548
549 if (err < 0) {
550 printf("libfdt fdt_add_mem_rsv(): %s\n",
551 fdt_strerror(err));
552 return err;
553 }
554 } else if (argv[2][0] == 'd') {
555 unsigned long idx = simple_strtoul(argv[3], NULL, 16);
556 int err = fdt_del_mem_rsv(working_fdt, idx);
557
558 if (err < 0) {
559 printf("libfdt fdt_del_mem_rsv(): %s\n",
560 fdt_strerror(err));
561 return err;
562 }
563 } else {
564 /* Unrecognized command */
565 return CMD_RET_USAGE;
566 }
567 }
568 #ifdef CONFIG_OF_BOARD_SETUP
569 /* Call the board-specific fixup routine */
570 else if (strncmp(argv[1], "boa", 3) == 0) {
571 int err = ft_board_setup(working_fdt, gd->bd);
572
573 if (err) {
574 printf("Failed to update board information in FDT: %s\n",
575 fdt_strerror(err));
576 return CMD_RET_FAILURE;
577 }
578 }
579 #endif
580 #ifdef CONFIG_OF_SYSTEM_SETUP
581 /* Call the board-specific fixup routine */
582 else if (strncmp(argv[1], "sys", 3) == 0) {
583 int err = ft_system_setup(working_fdt, gd->bd);
584
585 if (err) {
586 printf("Failed to add system information to FDT: %s\n",
587 fdt_strerror(err));
588 return CMD_RET_FAILURE;
589 }
590 }
591 #endif
592 /* Create a chosen node */
593 else if (strncmp(argv[1], "cho", 3) == 0) {
594 unsigned long initrd_start = 0, initrd_end = 0;
595
596 if ((argc != 2) && (argc != 4))
597 return CMD_RET_USAGE;
598
599 if (argc == 4) {
600 initrd_start = simple_strtoul(argv[2], NULL, 16);
601 initrd_end = simple_strtoul(argv[3], NULL, 16);
602 }
603
604 fdt_chosen(working_fdt);
605 fdt_initrd(working_fdt, initrd_start, initrd_end);
606
607 #if defined(CONFIG_FIT_SIGNATURE)
608 } else if (strncmp(argv[1], "che", 3) == 0) {
609 int cfg_noffset;
610 int ret;
611 unsigned long addr;
612 struct fdt_header *blob;
613
614 if (!working_fdt)
615 return CMD_RET_FAILURE;
616
617 if (argc > 2) {
618 addr = simple_strtoul(argv[2], NULL, 16);
619 blob = map_sysmem(addr, 0);
620 } else {
621 blob = (struct fdt_header *)gd->fdt_blob;
622 }
623 if (!fdt_valid(&blob))
624 return 1;
625
626 gd->fdt_blob = blob;
627 cfg_noffset = fit_conf_get_node(working_fdt, NULL);
628 if (!cfg_noffset) {
629 printf("Could not find configuration node: %s\n",
630 fdt_strerror(cfg_noffset));
631 return CMD_RET_FAILURE;
632 }
633
634 ret = fit_config_verify(working_fdt, cfg_noffset);
635 if (ret == 0)
636 return CMD_RET_SUCCESS;
637 else
638 return CMD_RET_FAILURE;
639 #endif
640
641 }
642 #ifdef CONFIG_OF_LIBFDT_OVERLAY
643 /* apply an overlay */
644 else if (strncmp(argv[1], "ap", 2) == 0) {
645 unsigned long addr;
646 struct fdt_header *blob;
647
648 if (argc != 3)
649 return CMD_RET_USAGE;
650
651 if (!working_fdt)
652 return CMD_RET_FAILURE;
653
654 addr = simple_strtoul(argv[2], NULL, 16);
655 blob = map_sysmem(addr, 0);
656 if (!fdt_valid(&blob))
657 return CMD_RET_FAILURE;
658
659 if (fdt_overlay_apply(working_fdt, blob))
660 return CMD_RET_FAILURE;
661 }
662 #endif
663 /* resize the fdt */
664 else if (strncmp(argv[1], "re", 2) == 0) {
665 uint extrasize;
666 if (argc > 2)
667 extrasize = simple_strtoul(argv[2], NULL, 16);
668 else
669 extrasize = 0;
670 fdt_shrink_to_minimum(working_fdt, extrasize);
671 }
672 else {
673 /* Unrecognized command */
674 return CMD_RET_USAGE;
675 }
676
677 return 0;
678 }
679
680 /****************************************************************************/
681
682 /**
683 * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
684 *
685 * @blobp: Pointer to FDT pointer
686 * @return 1 if OK, 0 if bad (in which case *blobp is set to NULL)
687 */
688 static int fdt_valid(struct fdt_header **blobp)
689 {
690 const void *blob = *blobp;
691 int err;
692
693 if (blob == NULL) {
694 printf ("The address of the fdt is invalid (NULL).\n");
695 return 0;
696 }
697
698 err = fdt_check_header(blob);
699 if (err == 0)
700 return 1; /* valid */
701
702 if (err < 0) {
703 printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
704 /*
705 * Be more informative on bad version.
706 */
707 if (err == -FDT_ERR_BADVERSION) {
708 if (fdt_version(blob) <
709 FDT_FIRST_SUPPORTED_VERSION) {
710 printf (" - too old, fdt %d < %d",
711 fdt_version(blob),
712 FDT_FIRST_SUPPORTED_VERSION);
713 }
714 if (fdt_last_comp_version(blob) >
715 FDT_LAST_SUPPORTED_VERSION) {
716 printf (" - too new, fdt %d > %d",
717 fdt_version(blob),
718 FDT_LAST_SUPPORTED_VERSION);
719 }
720 }
721 printf("\n");
722 *blobp = NULL;
723 return 0;
724 }
725 return 1;
726 }
727
728 /****************************************************************************/
729
730 /*
731 * Parse the user's input, partially heuristic. Valid formats:
732 * <0x00112233 4 05> - an array of cells. Numbers follow standard
733 * C conventions.
734 * [00 11 22 .. nn] - byte stream
735 * "string" - If the the value doesn't start with "<" or "[", it is
736 * treated as a string. Note that the quotes are
737 * stripped by the parser before we get the string.
738 * newval: An array of strings containing the new property as specified
739 * on the command line
740 * count: The number of strings in the array
741 * data: A bytestream to be placed in the property
742 * len: The length of the resulting bytestream
743 */
744 static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
745 {
746 char *cp; /* temporary char pointer */
747 char *newp; /* temporary newval char pointer */
748 unsigned long tmp; /* holds converted values */
749 int stridx = 0;
750
751 *len = 0;
752 newp = newval[0];
753
754 /* An array of cells */
755 if (*newp == '<') {
756 newp++;
757 while ((*newp != '>') && (stridx < count)) {
758 /*
759 * Keep searching until we find that last ">"
760 * That way users don't have to escape the spaces
761 */
762 if (*newp == '\0') {
763 newp = newval[++stridx];
764 continue;
765 }
766
767 cp = newp;
768 tmp = simple_strtoul(cp, &newp, 0);
769 *(__be32 *)data = __cpu_to_be32(tmp);
770 data += 4;
771 *len += 4;
772
773 /* If the ptr didn't advance, something went wrong */
774 if ((newp - cp) <= 0) {
775 printf("Sorry, I could not convert \"%s\"\n",
776 cp);
777 return 1;
778 }
779
780 while (*newp == ' ')
781 newp++;
782 }
783
784 if (*newp != '>') {
785 printf("Unexpected character '%c'\n", *newp);
786 return 1;
787 }
788 } else if (*newp == '[') {
789 /*
790 * Byte stream. Convert the values.
791 */
792 newp++;
793 while ((stridx < count) && (*newp != ']')) {
794 while (*newp == ' ')
795 newp++;
796 if (*newp == '\0') {
797 newp = newval[++stridx];
798 continue;
799 }
800 if (!isxdigit(*newp))
801 break;
802 tmp = simple_strtoul(newp, &newp, 16);
803 *data++ = tmp & 0xFF;
804 *len = *len + 1;
805 }
806 if (*newp != ']') {
807 printf("Unexpected character '%c'\n", *newp);
808 return 1;
809 }
810 } else {
811 /*
812 * Assume it is one or more strings. Copy it into our
813 * data area for convenience (including the
814 * terminating '\0's).
815 */
816 while (stridx < count) {
817 size_t length = strlen(newp) + 1;
818 strcpy(data, newp);
819 data += length;
820 *len += length;
821 newp = newval[++stridx];
822 }
823 }
824 return 0;
825 }
826
827 /****************************************************************************/
828
829 /*
830 * Heuristic to guess if this is a string or concatenated strings.
831 */
832
833 static int is_printable_string(const void *data, int len)
834 {
835 const char *s = data;
836
837 /* zero length is not */
838 if (len == 0)
839 return 0;
840
841 /* must terminate with zero or '\n' */
842 if (s[len - 1] != '\0' && s[len - 1] != '\n')
843 return 0;
844
845 /* printable or a null byte (concatenated strings) */
846 while (((*s == '\0') || isprint(*s) || isspace(*s)) && (len > 0)) {
847 /*
848 * If we see a null, there are three possibilities:
849 * 1) If len == 1, it is the end of the string, printable
850 * 2) Next character also a null, not printable.
851 * 3) Next character not a null, continue to check.
852 */
853 if (s[0] == '\0') {
854 if (len == 1)
855 return 1;
856 if (s[1] == '\0')
857 return 0;
858 }
859 s++;
860 len--;
861 }
862
863 /* Not the null termination, or not done yet: not printable */
864 if (*s != '\0' || (len != 0))
865 return 0;
866
867 return 1;
868 }
869
870
871 /*
872 * Print the property in the best format, a heuristic guess. Print as
873 * a string, concatenated strings, a byte, word, double word, or (if all
874 * else fails) it is printed as a stream of bytes.
875 */
876 static void print_data(const void *data, int len)
877 {
878 int j;
879
880 /* no data, don't print */
881 if (len == 0)
882 return;
883
884 /*
885 * It is a string, but it may have multiple strings (embedded '\0's).
886 */
887 if (is_printable_string(data, len)) {
888 puts("\"");
889 j = 0;
890 while (j < len) {
891 if (j > 0)
892 puts("\", \"");
893 puts(data);
894 j += strlen(data) + 1;
895 data += strlen(data) + 1;
896 }
897 puts("\"");
898 return;
899 }
900
901 if ((len %4) == 0) {
902 if (len > CONFIG_CMD_FDT_MAX_DUMP)
903 printf("* 0x%p [0x%08x]", data, len);
904 else {
905 const __be32 *p;
906
907 printf("<");
908 for (j = 0, p = data; j < len/4; j++)
909 printf("0x%08x%s", fdt32_to_cpu(p[j]),
910 j < (len/4 - 1) ? " " : "");
911 printf(">");
912 }
913 } else { /* anything else... hexdump */
914 if (len > CONFIG_CMD_FDT_MAX_DUMP)
915 printf("* 0x%p [0x%08x]", data, len);
916 else {
917 const u8 *s;
918
919 printf("[");
920 for (j = 0, s = data; j < len; j++)
921 printf("%02x%s", s[j], j < len - 1 ? " " : "");
922 printf("]");
923 }
924 }
925 }
926
927 /****************************************************************************/
928
929 /*
930 * Recursively print (a portion of) the working_fdt. The depth parameter
931 * determines how deeply nested the fdt is printed.
932 */
933 static int fdt_print(const char *pathp, char *prop, int depth)
934 {
935 static char tabs[MAX_LEVEL+1] =
936 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
937 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
938 const void *nodep; /* property node pointer */
939 int nodeoffset; /* node offset from libfdt */
940 int nextoffset; /* next node offset from libfdt */
941 uint32_t tag; /* tag */
942 int len; /* length of the property */
943 int level = 0; /* keep track of nesting level */
944 const struct fdt_property *fdt_prop;
945
946 nodeoffset = fdt_path_offset (working_fdt, pathp);
947 if (nodeoffset < 0) {
948 /*
949 * Not found or something else bad happened.
950 */
951 printf ("libfdt fdt_path_offset() returned %s\n",
952 fdt_strerror(nodeoffset));
953 return 1;
954 }
955 /*
956 * The user passed in a property as well as node path.
957 * Print only the given property and then return.
958 */
959 if (prop) {
960 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
961 if (len == 0) {
962 /* no property value */
963 printf("%s %s\n", pathp, prop);
964 return 0;
965 } else if (len > 0) {
966 printf("%s = ", prop);
967 print_data (nodep, len);
968 printf("\n");
969 return 0;
970 } else {
971 printf ("libfdt fdt_getprop(): %s\n",
972 fdt_strerror(len));
973 return 1;
974 }
975 }
976
977 /*
978 * The user passed in a node path and no property,
979 * print the node and all subnodes.
980 */
981 while(level >= 0) {
982 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
983 switch(tag) {
984 case FDT_BEGIN_NODE:
985 pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
986 if (level <= depth) {
987 if (pathp == NULL)
988 pathp = "/* NULL pointer error */";
989 if (*pathp == '\0')
990 pathp = "/"; /* root is nameless */
991 printf("%s%s {\n",
992 &tabs[MAX_LEVEL - level], pathp);
993 }
994 level++;
995 if (level >= MAX_LEVEL) {
996 printf("Nested too deep, aborting.\n");
997 return 1;
998 }
999 break;
1000 case FDT_END_NODE:
1001 level--;
1002 if (level <= depth)
1003 printf("%s};\n", &tabs[MAX_LEVEL - level]);
1004 if (level == 0) {
1005 level = -1; /* exit the loop */
1006 }
1007 break;
1008 case FDT_PROP:
1009 fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
1010 sizeof(*fdt_prop));
1011 pathp = fdt_string(working_fdt,
1012 fdt32_to_cpu(fdt_prop->nameoff));
1013 len = fdt32_to_cpu(fdt_prop->len);
1014 nodep = fdt_prop->data;
1015 if (len < 0) {
1016 printf ("libfdt fdt_getprop(): %s\n",
1017 fdt_strerror(len));
1018 return 1;
1019 } else if (len == 0) {
1020 /* the property has no value */
1021 if (level <= depth)
1022 printf("%s%s;\n",
1023 &tabs[MAX_LEVEL - level],
1024 pathp);
1025 } else {
1026 if (level <= depth) {
1027 printf("%s%s = ",
1028 &tabs[MAX_LEVEL - level],
1029 pathp);
1030 print_data (nodep, len);
1031 printf(";\n");
1032 }
1033 }
1034 break;
1035 case FDT_NOP:
1036 printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
1037 break;
1038 case FDT_END:
1039 return 1;
1040 default:
1041 if (level <= depth)
1042 printf("Unknown tag 0x%08X\n", tag);
1043 return 1;
1044 }
1045 nodeoffset = nextoffset;
1046 }
1047 return 0;
1048 }
1049
1050 /********************************************************************/
1051 #ifdef CONFIG_SYS_LONGHELP
1052 static char fdt_help_text[] =
1053 "addr [-c] <addr> [<length>] - Set the [control] fdt location to <addr>\n"
1054 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1055 "fdt apply <addr> - Apply overlay to the DT\n"
1056 #endif
1057 #ifdef CONFIG_OF_BOARD_SETUP
1058 "fdt boardsetup - Do board-specific set up\n"
1059 #endif
1060 #ifdef CONFIG_OF_SYSTEM_SETUP
1061 "fdt systemsetup - Do system-specific set up\n"
1062 #endif
1063 "fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1064 "fdt resize [<extrasize>] - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
1065 "fdt print <path> [<prop>] - Recursive print starting at <path>\n"
1066 "fdt list <path> [<prop>] - Print one level starting at <path>\n"
1067 "fdt get value <var> <path> <prop> - Get <property> and store in <var>\n"
1068 "fdt get name <var> <path> <index> - Get name of node <index> and store in <var>\n"
1069 "fdt get addr <var> <path> <prop> - Get start address of <property> and store in <var>\n"
1070 "fdt get size <var> <path> [<prop>] - Get size of [<property>] or num nodes and store in <var>\n"
1071 "fdt set <path> <prop> [<val>] - Set <property> [to <val>]\n"
1072 "fdt mknode <path> <node> - Create a new node after <path>\n"
1073 "fdt rm <path> [<prop>] - Delete the node or <property>\n"
1074 "fdt header - Display header info\n"
1075 "fdt bootcpu <id> - Set boot cpuid\n"
1076 "fdt memory <addr> <size> - Add/Update memory node\n"
1077 "fdt rsvmem print - Show current mem reserves\n"
1078 "fdt rsvmem add <addr> <size> - Add a mem reserve\n"
1079 "fdt rsvmem delete <index> - Delete a mem reserves\n"
1080 "fdt chosen [<start> <end>] - Add/update the /chosen branch in the tree\n"
1081 " <start>/<end> - initrd start/end addr\n"
1082 #if defined(CONFIG_FIT_SIGNATURE)
1083 "fdt checksign [<addr>] - check FIT signature\n"
1084 " <start> - addr of key blob\n"
1085 " default gd->fdt_blob\n"
1086 #endif
1087 "NOTE: Dereference aliases by omitting the leading '/', "
1088 "e.g. fdt print ethernet0.";
1089 #endif
1090
1091 U_BOOT_CMD(
1092 fdt, 255, 0, do_fdt,
1093 "flattened device tree utility commands", fdt_help_text
1094 );
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