summaryrefslogtreecommitdiff
path: root/cmd/fdt.c
blob: 2a207bf2b51554aac48d2768a02636bff3a583f8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2007
 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
 * Based on code written by:
 *   Pantelis Antoniou <pantelis.antoniou@gmail.com> and
 *   Matthew McClintock <msm@freescale.com>
 */

#include <common.h>
#include <command.h>
#include <env.h>
#include <image.h>
#include <linux/ctype.h>
#include <linux/types.h>
#include <asm/global_data.h>
#include <linux/libfdt.h>
#include <fdt_support.h>
#include <mapmem.h>
#include <asm/io.h>

#define MAX_LEVEL	32		/* how deeply nested we will go */
#define SCRATCHPAD	1024		/* bytes of scratchpad memory */

/*
 * Global data (for the gd->bd)
 */
DECLARE_GLOBAL_DATA_PTR;

static int fdt_parse_prop(char *const*newval, int count, char *data, int *len);
static int fdt_print(const char *pathp, char *prop, int depth);
static int is_printable_string(const void *data, int len);

/*
 * The working_fdt points to our working flattened device tree.
 */
struct fdt_header *working_fdt;

void set_working_fdt_addr(ulong addr)
{
	void *buf;

	buf = map_sysmem(addr, 0);
	working_fdt = buf;
	env_set_hex("fdtaddr", addr);
}

/*
 * Get a value from the fdt and format it to be set in the environment
 */
static int fdt_value_env_set(const void *nodep, int len, const char *var)
{
	if (is_printable_string(nodep, len))
		env_set(var, (void *)nodep);
	else if (len == 4) {
		char buf[11];

		sprintf(buf, "0x%08X", fdt32_to_cpu(*(fdt32_t *)nodep));
		env_set(var, buf);
	} else if (len%4 == 0 && len <= 20) {
		/* Needed to print things like sha1 hashes. */
		char buf[41];
		int i;

		for (i = 0; i < len; i += sizeof(unsigned int))
			sprintf(buf + (i * 2), "%08x",
				*(unsigned int *)(nodep + i));
		env_set(var, buf);
	} else {
		printf("error: unprintable value\n");
		return 1;
	}
	return 0;
}

static const char * const fdt_member_table[] = {
	"magic",
	"totalsize",
	"off_dt_struct",
	"off_dt_strings",
	"off_mem_rsvmap",
	"version",
	"last_comp_version",
	"boot_cpuid_phys",
	"size_dt_strings",
	"size_dt_struct",
};

static int fdt_get_header_value(int argc, char *const argv[])
{
	fdt32_t *fdtp = (fdt32_t *)working_fdt;
	ulong val;
	int i;

	if (argv[2][0] != 'g')
		return CMD_RET_FAILURE;

	for (i = 0; i < ARRAY_SIZE(fdt_member_table); i++) {
		if (strcmp(fdt_member_table[i], argv[4]))
			continue;

		val = fdt32_to_cpu(fdtp[i]);
		env_set_hex(argv[3], val);
		return CMD_RET_SUCCESS;
	}

	return CMD_RET_FAILURE;
}

/*
 * Flattened Device Tree command, see the help for parameter definitions.
 */
static int do_fdt(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
	if (argc < 2)
		return CMD_RET_USAGE;

	/* fdt addr: Set the address of the fdt */
	if (strncmp(argv[1], "ad", 2) == 0) {
		unsigned long addr;
		int control = 0;
		struct fdt_header *blob;

		/* Set the address [and length] of the fdt */
		argc -= 2;
		argv += 2;
		if (argc && !strcmp(*argv, "-c")) {
			control = 1;
			argc--;
			argv++;
		}
		if (argc == 0) {
			if (control)
				blob = (struct fdt_header *)gd->fdt_blob;
			else
				blob = working_fdt;
			if (!blob || !fdt_valid(&blob))
				return 1;
			printf("%s fdt: %08lx\n",
			       control ? "Control" : "Working",
			       control ? (ulong)map_to_sysmem(blob) :
			       env_get_hex("fdtaddr", 0));
			return 0;
		}

		addr = hextoul(argv[0], NULL);
		blob = map_sysmem(addr, 0);
		if (!fdt_valid(&blob))
			return 1;
		if (control)
			gd->fdt_blob = blob;
		else
			set_working_fdt_addr(addr);

		if (argc >= 2) {
			int  len;
			int  err;

			/* Optional new length */
			len = hextoul(argv[1], NULL);
			if (len < fdt_totalsize(blob)) {
				printf("New length %d < existing length %d, ignoring\n",
				       len, fdt_totalsize(blob));
			} else {
				/* Open in place with a new length */
				err = fdt_open_into(blob, blob, len);
				if (err != 0) {
					printf("libfdt fdt_open_into(): %s\n",
					       fdt_strerror(err));
				}
			}
		}

		return CMD_RET_SUCCESS;
	}

	if (!working_fdt) {
		puts("No FDT memory address configured. Please configure\n"
		     "the FDT address via \"fdt addr <address>\" command.\n"
		     "Aborting!\n");
		return CMD_RET_FAILURE;
	}

	/*
	 * Move the working_fdt
	 */
	if (strncmp(argv[1], "mo", 2) == 0) {
		struct fdt_header *newaddr;
		int  len;
		int  err;

		if (argc < 4)
			return CMD_RET_USAGE;

		/*
		 * Set the address and length of the fdt.
		 */
		working_fdt = (struct fdt_header *)hextoul(argv[2], NULL);
		if (!fdt_valid(&working_fdt))
			return 1;

		newaddr = (struct fdt_header *)hextoul(argv[3], NULL);

		/*
		 * If the user specifies a length, use that.  Otherwise use the
		 * current length.
		 */
		if (argc <= 4) {
			len = fdt_totalsize(working_fdt);
		} else {
			len = hextoul(argv[4], NULL);
			if (len < fdt_totalsize(working_fdt)) {
				printf ("New length 0x%X < existing length "
					"0x%X, aborting.\n",
					len, fdt_totalsize(working_fdt));
				return 1;
			}
		}

		/*
		 * Copy to the new location.
		 */
		err = fdt_open_into(working_fdt, newaddr, len);
		if (err != 0) {
			printf ("libfdt fdt_open_into(): %s\n",
				fdt_strerror(err));
			return 1;
		}
		set_working_fdt_addr((ulong)newaddr);
#ifdef CONFIG_OF_SYSTEM_SETUP
	/* Call the board-specific fixup routine */
	} else if (strncmp(argv[1], "sys", 3) == 0) {
		int err = ft_system_setup(working_fdt, gd->bd);

		if (err) {
			printf("Failed to add system information to FDT: %s\n",
			       fdt_strerror(err));
			return CMD_RET_FAILURE;
		}
#endif
	/*
	 * Make a new node
	 */
	} else if (strncmp(argv[1], "mk", 2) == 0) {
		char *pathp;		/* path */
		char *nodep;		/* new node to add */
		int  nodeoffset;	/* node offset from libfdt */
		int  err;

		/*
		 * Parameters: Node path, new node to be appended to the path.
		 */
		if (argc < 4)
			return CMD_RET_USAGE;

		pathp = argv[2];
		nodep = argv[3];

		nodeoffset = fdt_path_offset (working_fdt, pathp);
		if (nodeoffset < 0) {
			/*
			 * Not found or something else bad happened.
			 */
			printf ("libfdt fdt_path_offset() returned %s\n",
				fdt_strerror(nodeoffset));
			return 1;
		}
		err = fdt_add_subnode(working_fdt, nodeoffset, nodep);
		if (err < 0) {
			printf ("libfdt fdt_add_subnode(): %s\n",
				fdt_strerror(err));
			return 1;
		}

	/*
	 * Set the value of a property in the working_fdt.
	 */
	} else if (strncmp(argv[1], "se", 2) == 0) {
		char *pathp;		/* path */
		char *prop;		/* property */
		int  nodeoffset;	/* node offset from libfdt */
		static char data[SCRATCHPAD] __aligned(4);/* property storage */
		const void *ptmp;
		int  len;		/* new length of the property */
		int  ret;		/* return value */

		/*
		 * Parameters: Node path, property, optional value.
		 */
		if (argc < 4)
			return CMD_RET_USAGE;

		pathp  = argv[2];
		prop   = argv[3];

		nodeoffset = fdt_path_offset (working_fdt, pathp);
		if (nodeoffset < 0) {
			/*
			 * Not found or something else bad happened.
			 */
			printf ("libfdt fdt_path_offset() returned %s\n",
				fdt_strerror(nodeoffset));
			return 1;
		}

		if (argc == 4) {
			len = 0;
		} else {
			ptmp = fdt_getprop(working_fdt, nodeoffset, prop, &len);
			if (len > SCRATCHPAD) {
				printf("prop (%d) doesn't fit in scratchpad!\n",
				       len);
				return 1;
			}
			if (ptmp != NULL)
				memcpy(data, ptmp, len);

			ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
			if (ret != 0)
				return ret;
		}

		ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
		if (ret < 0) {
			printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
			return 1;
		}

	/********************************************************************
	 * Get the value of a property in the working_fdt.
	 ********************************************************************/
	} else if (argv[1][0] == 'g') {
		char *subcmd;		/* sub-command */
		char *pathp;		/* path */
		char *prop;		/* property */
		char *var;		/* variable to store result */
		int  nodeoffset;	/* node offset from libfdt */
		const void *nodep;	/* property node pointer */
		int  len = 0;		/* new length of the property */

		/*
		 * Parameters: Node path, property, optional value.
		 */
		if (argc < 5)
			return CMD_RET_USAGE;

		subcmd = argv[2];

		if (argc < 6 && subcmd[0] != 's')
			return CMD_RET_USAGE;

		var    = argv[3];
		pathp  = argv[4];
		prop   = argv[5];

		nodeoffset = fdt_path_offset(working_fdt, pathp);
		if (nodeoffset < 0) {
			/*
			 * Not found or something else bad happened.
			 */
			printf("libfdt fdt_path_offset() returned %s\n",
				fdt_strerror(nodeoffset));
			return 1;
		}

		if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
			int req_index = -1;
			int startDepth = fdt_node_depth(
				working_fdt, nodeoffset);
			int curDepth = startDepth;
			int cur_index = -1;
			int nextNodeOffset = fdt_next_node(
				working_fdt, nodeoffset, &curDepth);

			if (subcmd[0] == 'n')
				req_index = hextoul(argv[5], NULL);

			while (curDepth > startDepth) {
				if (curDepth == startDepth + 1)
					cur_index++;
				if (subcmd[0] == 'n' &&
				    cur_index == req_index) {
					const char *node_name;

					node_name = fdt_get_name(working_fdt,
								 nextNodeOffset,
								 NULL);
					env_set(var, node_name);
					return 0;
				}
				nextNodeOffset = fdt_next_node(
					working_fdt, nextNodeOffset, &curDepth);
				if (nextNodeOffset < 0)
					break;
			}
			if (subcmd[0] == 's') {
				/* get the num nodes at this level */
				env_set_ulong(var, cur_index + 1);
			} else {
				/* node index not found */
				printf("libfdt node not found\n");
				return 1;
			}
		} else {
			nodep = fdt_getprop(
				working_fdt, nodeoffset, prop, &len);
			if (len == 0) {
				/* no property value */
				env_set(var, "");
				return 0;
			} else if (nodep && len > 0) {
				if (subcmd[0] == 'v') {
					int ret;

					ret = fdt_value_env_set(nodep, len,
								var);
					if (ret != 0)
						return ret;
				} else if (subcmd[0] == 'a') {
					/* Get address */
					char buf[11];

					sprintf(buf, "0x%p", nodep);
					env_set(var, buf);
				} else if (subcmd[0] == 's') {
					/* Get size */
					char buf[11];

					sprintf(buf, "0x%08X", len);
					env_set(var, buf);
				} else
					return CMD_RET_USAGE;
				return 0;
			} else {
				printf("libfdt fdt_getprop(): %s\n",
					fdt_strerror(len));
				return 1;
			}
		}

	/*
	 * Print (recursive) / List (single level)
	 */
	} else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
		int depth = MAX_LEVEL;	/* how deep to print */
		char *pathp;		/* path */
		char *prop;		/* property */
		int  ret;		/* return value */
		static char root[2] = "/";

		/*
		 * list is an alias for print, but limited to 1 level
		 */
		if (argv[1][0] == 'l') {
			depth = 1;
		}

		/*
		 * Get the starting path.  The root node is an oddball,
		 * the offset is zero and has no name.
		 */
		if (argc == 2)
			pathp = root;
		else
			pathp = argv[2];
		if (argc > 3)
			prop = argv[3];
		else
			prop = NULL;

		ret = fdt_print(pathp, prop, depth);
		if (ret != 0)
			return ret;

	/*
	 * Remove a property/node
	 */
	} else if (strncmp(argv[1], "rm", 2) == 0) {
		int  nodeoffset;	/* node offset from libfdt */
		int  err;

		/*
		 * Get the path.  The root node is an oddball, the offset
		 * is zero and has no name.
		 */
		nodeoffset = fdt_path_offset (working_fdt, argv[2]);
		if (nodeoffset < 0) {
			/*
			 * Not found or something else bad happened.
			 */
			printf ("libfdt fdt_path_offset() returned %s\n",
				fdt_strerror(nodeoffset));
			return 1;
		}
		/*
		 * Do the delete.  A fourth parameter means delete a property,
		 * otherwise delete the node.
		 */
		if (argc > 3) {
			err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
			if (err < 0) {
				printf("libfdt fdt_delprop():  %s\n",
					fdt_strerror(err));
				return err;
			}
		} else {
			err = fdt_del_node(working_fdt, nodeoffset);
			if (err < 0) {
				printf("libfdt fdt_del_node():  %s\n",
					fdt_strerror(err));
				return err;
			}
		}

	/*
	 * Display header info
	 */
	} else if (argv[1][0] == 'h') {
		if (argc == 5)
			return fdt_get_header_value(argc, argv);

		u32 version = fdt_version(working_fdt);
		printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
		printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
		       fdt_totalsize(working_fdt));
		printf("off_dt_struct:\t\t0x%x\n",
		       fdt_off_dt_struct(working_fdt));
		printf("off_dt_strings:\t\t0x%x\n",
		       fdt_off_dt_strings(working_fdt));
		printf("off_mem_rsvmap:\t\t0x%x\n",
		       fdt_off_mem_rsvmap(working_fdt));
		printf("version:\t\t%d\n", version);
		printf("last_comp_version:\t%d\n",
		       fdt_last_comp_version(working_fdt));
		if (version >= 2)
			printf("boot_cpuid_phys:\t0x%x\n",
				fdt_boot_cpuid_phys(working_fdt));
		if (version >= 3)
			printf("size_dt_strings:\t0x%x\n",
				fdt_size_dt_strings(working_fdt));
		if (version >= 17)
			printf("size_dt_struct:\t\t0x%x\n",
				fdt_size_dt_struct(working_fdt));
		printf("number mem_rsv:\t\t0x%x\n",
		       fdt_num_mem_rsv(working_fdt));
		printf("\n");

	/*
	 * Set boot cpu id
	 */
	} else if (strncmp(argv[1], "boo", 3) == 0) {
		unsigned long tmp = hextoul(argv[2], NULL);
		fdt_set_boot_cpuid_phys(working_fdt, tmp);

	/*
	 * memory command
	 */
	} else if (strncmp(argv[1], "me", 2) == 0) {
		uint64_t addr, size;
		int err;
		addr = simple_strtoull(argv[2], NULL, 16);
		size = simple_strtoull(argv[3], NULL, 16);
		err = fdt_fixup_memory(working_fdt, addr, size);
		if (err < 0)
			return err;

	/*
	 * mem reserve commands
	 */
	} else if (strncmp(argv[1], "rs", 2) == 0) {
		if (argv[2][0] == 'p') {
			uint64_t addr, size;
			int total = fdt_num_mem_rsv(working_fdt);
			int j, err;
			printf("index\t\t   start\t\t    size\n");
			printf("-------------------------------"
				"-----------------\n");
			for (j = 0; j < total; j++) {
				err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
				if (err < 0) {
					printf("libfdt fdt_get_mem_rsv():  %s\n",
							fdt_strerror(err));
					return err;
				}
				printf("    %x\t%08x%08x\t%08x%08x\n", j,
					(u32)(addr >> 32),
					(u32)(addr & 0xffffffff),
					(u32)(size >> 32),
					(u32)(size & 0xffffffff));
			}
		} else if (argv[2][0] == 'a') {
			uint64_t addr, size;
			int err;
			addr = simple_strtoull(argv[3], NULL, 16);
			size = simple_strtoull(argv[4], NULL, 16);
			err = fdt_add_mem_rsv(working_fdt, addr, size);

			if (err < 0) {
				printf("libfdt fdt_add_mem_rsv():  %s\n",
					fdt_strerror(err));
				return err;
			}
		} else if (argv[2][0] == 'd') {
			unsigned long idx = hextoul(argv[3], NULL);
			int err = fdt_del_mem_rsv(working_fdt, idx);

			if (err < 0) {
				printf("libfdt fdt_del_mem_rsv():  %s\n",
					fdt_strerror(err));
				return err;
			}
		} else {
			/* Unrecognized command */
			return CMD_RET_USAGE;
		}
	}
#ifdef CONFIG_OF_BOARD_SETUP
	/* Call the board-specific fixup routine */
	else if (strncmp(argv[1], "boa", 3) == 0) {
		int err = ft_board_setup(working_fdt, gd->bd);

		if (err) {
			printf("Failed to update board information in FDT: %s\n",
			       fdt_strerror(err));
			return CMD_RET_FAILURE;
		}
#ifdef CONFIG_ARCH_KEYSTONE
		ft_board_setup_ex(working_fdt, gd->bd);
#endif
	}
#endif
	/* Create a chosen node */
	else if (strncmp(argv[1], "cho", 3) == 0) {
		unsigned long initrd_start = 0, initrd_end = 0;

		if ((argc != 2) && (argc != 4))
			return CMD_RET_USAGE;

		if (argc == 4) {
			initrd_start = hextoul(argv[2], NULL);
			initrd_end = hextoul(argv[3], NULL);
		}

		fdt_chosen(working_fdt);
		fdt_initrd(working_fdt, initrd_start, initrd_end);

#if defined(CONFIG_FIT_SIGNATURE)
	} else if (strncmp(argv[1], "che", 3) == 0) {
		int cfg_noffset;
		int ret;
		unsigned long addr;
		struct fdt_header *blob;

		if (!working_fdt)
			return CMD_RET_FAILURE;

		if (argc > 2) {
			addr = hextoul(argv[2], NULL);
			blob = map_sysmem(addr, 0);
		} else {
			blob = (struct fdt_header *)gd->fdt_blob;
		}
		if (!fdt_valid(&blob))
			return 1;

		gd->fdt_blob = blob;
		cfg_noffset = fit_conf_get_node(working_fdt, NULL);
		if (!cfg_noffset) {
			printf("Could not find configuration node: %s\n",
			       fdt_strerror(cfg_noffset));
			return CMD_RET_FAILURE;
		}

		ret = fit_config_verify(working_fdt, cfg_noffset);
		if (ret == 0)
			return CMD_RET_SUCCESS;
		else
			return CMD_RET_FAILURE;
#endif

	}
#ifdef CONFIG_OF_LIBFDT_OVERLAY
	/* apply an overlay */
	else if (strncmp(argv[1], "ap", 2) == 0) {
		unsigned long addr;
		struct fdt_header *blob;
		int ret;

		if (argc != 3)
			return CMD_RET_USAGE;

		if (!working_fdt)
			return CMD_RET_FAILURE;

		addr = hextoul(argv[2], NULL);
		blob = map_sysmem(addr, 0);
		if (!fdt_valid(&blob))
			return CMD_RET_FAILURE;

		/* apply method prints messages on error */
		ret = fdt_overlay_apply_verbose(working_fdt, blob);
		if (ret)
			return CMD_RET_FAILURE;
	}
#endif
	/* resize the fdt */
	else if (strncmp(argv[1], "re", 2) == 0) {
		uint extrasize;
		if (argc > 2)
			extrasize = hextoul(argv[2], NULL);
		else
			extrasize = 0;
		fdt_shrink_to_minimum(working_fdt, extrasize);
	}
	else {
		/* Unrecognized command */
		return CMD_RET_USAGE;
	}

	return 0;
}

/****************************************************************************/

/*
 * Parse the user's input, partially heuristic.  Valid formats:
 * <0x00112233 4 05>	- an array of cells.  Numbers follow standard
 *			C conventions.
 * [00 11 22 .. nn] - byte stream
 * "string"	- If the the value doesn't start with "<" or "[", it is
 *			treated as a string.  Note that the quotes are
 *			stripped by the parser before we get the string.
 * newval: An array of strings containing the new property as specified
 *	on the command line
 * count: The number of strings in the array
 * data: A bytestream to be placed in the property
 * len: The length of the resulting bytestream
 */
static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
{
	char *cp;		/* temporary char pointer */
	char *newp;		/* temporary newval char pointer */
	unsigned long tmp;	/* holds converted values */
	int stridx = 0;

	*len = 0;
	newp = newval[0];

	/* An array of cells */
	if (*newp == '<') {
		newp++;
		while ((*newp != '>') && (stridx < count)) {
			/*
			 * Keep searching until we find that last ">"
			 * That way users don't have to escape the spaces
			 */
			if (*newp == '\0') {
				newp = newval[++stridx];
				continue;
			}

			cp = newp;
			tmp = simple_strtoul(cp, &newp, 0);
			if (*cp != '?')
				*(fdt32_t *)data = cpu_to_fdt32(tmp);
			else
				newp++;

			data  += 4;
			*len += 4;

			/* If the ptr didn't advance, something went wrong */
			if ((newp - cp) <= 0) {
				printf("Sorry, I could not convert \"%s\"\n",
					cp);
				return 1;
			}

			while (*newp == ' ')
				newp++;
		}

		if (*newp != '>') {
			printf("Unexpected character '%c'\n", *newp);
			return 1;
		}
	} else if (*newp == '[') {
		/*
		 * Byte stream.  Convert the values.
		 */
		newp++;
		while ((stridx < count) && (*newp != ']')) {
			while (*newp == ' ')
				newp++;
			if (*newp == '\0') {
				newp = newval[++stridx];
				continue;
			}
			if (!isxdigit(*newp))
				break;
			tmp = hextoul(newp, &newp);
			*data++ = tmp & 0xFF;
			*len    = *len + 1;
		}
		if (*newp != ']') {
			printf("Unexpected character '%c'\n", *newp);
			return 1;
		}
	} else {
		/*
		 * Assume it is one or more strings.  Copy it into our
		 * data area for convenience (including the
		 * terminating '\0's).
		 */
		while (stridx < count) {
			size_t length = strlen(newp) + 1;
			strcpy(data, newp);
			data += length;
			*len += length;
			newp = newval[++stridx];
		}
	}
	return 0;
}

/****************************************************************************/

/*
 * Heuristic to guess if this is a string or concatenated strings.
 */

static int is_printable_string(const void *data, int len)
{
	const char *s = data;

	/* zero length is not */
	if (len == 0)
		return 0;

	/* must terminate with zero or '\n' */
	if (s[len - 1] != '\0' && s[len - 1] != '\n')
		return 0;

	/* printable or a null byte (concatenated strings) */
	while (((*s == '\0') || isprint(*s) || isspace(*s)) && (len > 0)) {
		/*
		 * If we see a null, there are three possibilities:
		 * 1) If len == 1, it is the end of the string, printable
		 * 2) Next character also a null, not printable.
		 * 3) Next character not a null, continue to check.
		 */
		if (s[0] == '\0') {
			if (len == 1)
				return 1;
			if (s[1] == '\0')
				return 0;
		}
		s++;
		len--;
	}

	/* Not the null termination, or not done yet: not printable */
	if (*s != '\0' || (len != 0))
		return 0;

	return 1;
}


/*
 * Print the property in the best format, a heuristic guess.  Print as
 * a string, concatenated strings, a byte, word, double word, or (if all
 * else fails) it is printed as a stream of bytes.
 */
static void print_data(const void *data, int len)
{
	int j;
	const char *env_max_dump;
	ulong max_dump = ULONG_MAX;

	/* no data, don't print */
	if (len == 0)
		return;

	env_max_dump = env_get("fdt_max_dump");
	if (env_max_dump)
		max_dump = hextoul(env_max_dump, NULL);

	/*
	 * It is a string, but it may have multiple strings (embedded '\0's).
	 */
	if (is_printable_string(data, len)) {
		puts("\"");
		j = 0;
		while (j < len) {
			if (j > 0)
				puts("\", \"");
			puts(data);
			j    += strlen(data) + 1;
			data += strlen(data) + 1;
		}
		puts("\"");
		return;
	}

	if ((len %4) == 0) {
		if (len > max_dump)
			printf("* 0x%p [0x%08x]", data, len);
		else {
			const __be32 *p;

			printf("<");
			for (j = 0, p = data; j < len/4; j++)
				printf("0x%08x%s", fdt32_to_cpu(p[j]),
					j < (len/4 - 1) ? " " : "");
			printf(">");
		}
	} else { /* anything else... hexdump */
		if (len > max_dump)
			printf("* 0x%p [0x%08x]", data, len);
		else {
			const u8 *s;

			printf("[");
			for (j = 0, s = data; j < len; j++)
				printf("%02x%s", s[j], j < len - 1 ? " " : "");
			printf("]");
		}
	}
}

/****************************************************************************/

/*
 * Recursively print (a portion of) the working_fdt.  The depth parameter
 * determines how deeply nested the fdt is printed.
 */
static int fdt_print(const char *pathp, char *prop, int depth)
{
	static char tabs[MAX_LEVEL+1] =
		"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
		"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
	const void *nodep;	/* property node pointer */
	int  nodeoffset;	/* node offset from libfdt */
	int  nextoffset;	/* next node offset from libfdt */
	uint32_t tag;		/* tag */
	int  len;		/* length of the property */
	int  level = 0;		/* keep track of nesting level */
	const struct fdt_property *fdt_prop;

	nodeoffset = fdt_path_offset (working_fdt, pathp);
	if (nodeoffset < 0) {
		/*
		 * Not found or something else bad happened.
		 */
		printf ("libfdt fdt_path_offset() returned %s\n",
			fdt_strerror(nodeoffset));
		return 1;
	}
	/*
	 * The user passed in a property as well as node path.
	 * Print only the given property and then return.
	 */
	if (prop) {
		nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
		if (len == 0) {
			/* no property value */
			printf("%s %s\n", pathp, prop);
			return 0;
		} else if (nodep && len > 0) {
			printf("%s = ", prop);
			print_data (nodep, len);
			printf("\n");
			return 0;
		} else {
			printf ("libfdt fdt_getprop(): %s\n",
				fdt_strerror(len));
			return 1;
		}
	}

	/*
	 * The user passed in a node path and no property,
	 * print the node and all subnodes.
	 */
	while(level >= 0) {
		tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
		switch(tag) {
		case FDT_BEGIN_NODE:
			pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
			if (level <= depth) {
				if (pathp == NULL)
					pathp = "/* NULL pointer error */";
				if (*pathp == '\0')
					pathp = "/";	/* root is nameless */
				printf("%s%s {\n",
					&tabs[MAX_LEVEL - level], pathp);
			}
			level++;
			if (level >= MAX_LEVEL) {
				printf("Nested too deep, aborting.\n");
				return 1;
			}
			break;
		case FDT_END_NODE:
			level--;
			if (level <= depth)
				printf("%s};\n", &tabs[MAX_LEVEL - level]);
			if (level == 0) {
				level = -1;		/* exit the loop */
			}
			break;
		case FDT_PROP:
			fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
					sizeof(*fdt_prop));
			pathp    = fdt_string(working_fdt,
					fdt32_to_cpu(fdt_prop->nameoff));
			len      = fdt32_to_cpu(fdt_prop->len);
			nodep    = fdt_prop->data;
			if (len < 0) {
				printf ("libfdt fdt_getprop(): %s\n",
					fdt_strerror(len));
				return 1;
			} else if (len == 0) {
				/* the property has no value */
				if (level <= depth)
					printf("%s%s;\n",
						&tabs[MAX_LEVEL - level],
						pathp);
			} else {
				if (level <= depth) {
					printf("%s%s = ",
						&tabs[MAX_LEVEL - level],
						pathp);
					print_data (nodep, len);
					printf(";\n");
				}
			}
			break;
		case FDT_NOP:
			printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
			break;
		case FDT_END:
			return 1;
		default:
			if (level <= depth)
				printf("Unknown tag 0x%08X\n", tag);
			return 1;
		}
		nodeoffset = nextoffset;
	}
	return 0;
}

/********************************************************************/
#ifdef CONFIG_SYS_LONGHELP
static char fdt_help_text[] =
	"addr [-c]  <addr> [<length>]   - Set the [control] fdt location to <addr>\n"
#ifdef CONFIG_OF_LIBFDT_OVERLAY
	"fdt apply <addr>                    - Apply overlay to the DT\n"
#endif
#ifdef CONFIG_OF_BOARD_SETUP
	"fdt boardsetup                      - Do board-specific set up\n"
#endif
#ifdef CONFIG_OF_SYSTEM_SETUP
	"fdt systemsetup                     - Do system-specific set up\n"
#endif
	"fdt move   <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
	"fdt resize [<extrasize>]            - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
	"fdt print  <path> [<prop>]          - Recursive print starting at <path>\n"
	"fdt list   <path> [<prop>]          - Print one level starting at <path>\n"
	"fdt get value <var> <path> <prop>   - Get <property> and store in <var>\n"
	"fdt get name <var> <path> <index>   - Get name of node <index> and store in <var>\n"
	"fdt get addr <var> <path> <prop>    - Get start address of <property> and store in <var>\n"
	"fdt get size <var> <path> [<prop>]  - Get size of [<property>] or num nodes and store in <var>\n"
	"fdt set    <path> <prop> [<val>]    - Set <property> [to <val>]\n"
	"fdt mknode <path> <node>            - Create a new node after <path>\n"
	"fdt rm     <path> [<prop>]          - Delete the node or <property>\n"
	"fdt header [get <var> <member>]     - Display header info\n"
	"                                      get - get header member <member> and store it in <var>\n"
	"fdt bootcpu <id>                    - Set boot cpuid\n"
	"fdt memory <addr> <size>            - Add/Update memory node\n"
	"fdt rsvmem print                    - Show current mem reserves\n"
	"fdt rsvmem add <addr> <size>        - Add a mem reserve\n"
	"fdt rsvmem delete <index>           - Delete a mem reserves\n"
	"fdt chosen [<start> <end>]          - Add/update the /chosen branch in the tree\n"
	"                                        <start>/<end> - initrd start/end addr\n"
#if defined(CONFIG_FIT_SIGNATURE)
	"fdt checksign [<addr>]              - check FIT signature\n"
	"                                        <start> - addr of key blob\n"
	"                                                  default gd->fdt_blob\n"
#endif
	"NOTE: Dereference aliases by omitting the leading '/', "
		"e.g. fdt print ethernet0.";
#endif

U_BOOT_CMD(
	fdt,	255,	0,	do_fdt,
	"flattened device tree utility commands", fdt_help_text
);