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>
8 * SPDX-License-Identifier: GPL-2.0+
13 #include <linux/ctype.h>
14 #include <linux/types.h>
15 #include <asm/global_data.h>
17 #include <fdt_support.h>
21 #define MAX_LEVEL 32 /* how deeply nested we will go */
22 #define SCRATCHPAD 1024 /* bytes of scratchpad memory */
23 #define CMD_FDT_MAX_DUMP 64
26 * Global data (for the gd->bd)
28 DECLARE_GLOBAL_DATA_PTR
;
30 static int fdt_valid(struct fdt_header
**blobp
);
31 static int fdt_parse_prop(char *const*newval
, int count
, char *data
, int *len
);
32 static int fdt_print(const char *pathp
, char *prop
, int depth
);
33 static int is_printable_string(const void *data
, int len
);
36 * The working_fdt points to our working flattened device tree.
38 struct fdt_header
*working_fdt
;
40 void set_working_fdt_addr(ulong addr
)
44 buf
= map_sysmem(addr
, 0);
46 env_set_hex("fdtaddr", addr
);
50 * Get a value from the fdt and format it to be set in the environment
52 static int fdt_value_env_set(const void *nodep
, int len
, const char *var
)
54 if (is_printable_string(nodep
, len
))
55 env_set(var
, (void *)nodep
);
59 sprintf(buf
, "0x%08X", fdt32_to_cpu(*(fdt32_t
*)nodep
));
61 } else if (len
%4 == 0 && len
<= 20) {
62 /* Needed to print things like sha1 hashes. */
66 for (i
= 0; i
< len
; i
+= sizeof(unsigned int))
67 sprintf(buf
+ (i
* 2), "%08x",
68 *(unsigned int *)(nodep
+ i
));
71 printf("error: unprintable value\n");
78 * Flattened Device Tree command, see the help for parameter definitions.
80 static int do_fdt(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
86 * Set the address of the fdt
88 if (strncmp(argv
[1], "ad", 2) == 0) {
91 struct fdt_header
*blob
;
93 * Set the address [and length] of the fdt.
97 /* Temporary #ifdef - some archs don't have fdt_blob yet */
98 #ifdef CONFIG_OF_CONTROL
99 if (argc
&& !strcmp(*argv
, "-c")) {
107 blob
= (struct fdt_header
*)gd
->fdt_blob
;
110 if (!blob
|| !fdt_valid(&blob
))
112 printf("The address of the fdt is %#08lx\n",
113 control
? (ulong
)map_to_sysmem(blob
) :
114 env_get_hex("fdtaddr", 0));
118 addr
= simple_strtoul(argv
[0], NULL
, 16);
119 blob
= map_sysmem(addr
, 0);
120 if (!fdt_valid(&blob
))
125 set_working_fdt_addr(addr
);
131 * Optional new length
133 len
= simple_strtoul(argv
[1], NULL
, 16);
134 if (len
< fdt_totalsize(blob
)) {
135 printf ("New length %d < existing length %d, "
137 len
, fdt_totalsize(blob
));
140 * Open in place with a new length.
142 err
= fdt_open_into(blob
, blob
, len
);
144 printf ("libfdt fdt_open_into(): %s\n",
150 return CMD_RET_SUCCESS
;
155 "No FDT memory address configured. Please configure\n"
156 "the FDT address via \"fdt addr <address>\" command.\n"
158 return CMD_RET_FAILURE
;
162 * Move the working_fdt
164 if (strncmp(argv
[1], "mo", 2) == 0) {
165 struct fdt_header
*newaddr
;
170 return CMD_RET_USAGE
;
173 * Set the address and length of the fdt.
175 working_fdt
= (struct fdt_header
*)simple_strtoul(argv
[2], NULL
, 16);
176 if (!fdt_valid(&working_fdt
))
179 newaddr
= (struct fdt_header
*)simple_strtoul(argv
[3],NULL
,16);
182 * If the user specifies a length, use that. Otherwise use the
186 len
= fdt_totalsize(working_fdt
);
188 len
= simple_strtoul(argv
[4], NULL
, 16);
189 if (len
< fdt_totalsize(working_fdt
)) {
190 printf ("New length 0x%X < existing length "
192 len
, fdt_totalsize(working_fdt
));
198 * Copy to the new location.
200 err
= fdt_open_into(working_fdt
, newaddr
, len
);
202 printf ("libfdt fdt_open_into(): %s\n",
206 working_fdt
= newaddr
;
207 #ifdef CONFIG_OF_SYSTEM_SETUP
208 /* Call the board-specific fixup routine */
209 } else if (strncmp(argv
[1], "sys", 3) == 0) {
210 int err
= ft_system_setup(working_fdt
, gd
->bd
);
213 printf("Failed to add system information to FDT: %s\n",
215 return CMD_RET_FAILURE
;
221 } else if (strncmp(argv
[1], "mk", 2) == 0) {
222 char *pathp
; /* path */
223 char *nodep
; /* new node to add */
224 int nodeoffset
; /* node offset from libfdt */
228 * Parameters: Node path, new node to be appended to the path.
231 return CMD_RET_USAGE
;
236 nodeoffset
= fdt_path_offset (working_fdt
, pathp
);
237 if (nodeoffset
< 0) {
239 * Not found or something else bad happened.
241 printf ("libfdt fdt_path_offset() returned %s\n",
242 fdt_strerror(nodeoffset
));
245 err
= fdt_add_subnode(working_fdt
, nodeoffset
, nodep
);
247 printf ("libfdt fdt_add_subnode(): %s\n",
253 * Set the value of a property in the working_fdt.
255 } else if (argv
[1][0] == 's') {
256 char *pathp
; /* path */
257 char *prop
; /* property */
258 int nodeoffset
; /* node offset from libfdt */
259 static char data
[SCRATCHPAD
]; /* storage for the property */
261 int len
; /* new length of the property */
262 int ret
; /* return value */
265 * Parameters: Node path, property, optional value.
268 return CMD_RET_USAGE
;
273 nodeoffset
= fdt_path_offset (working_fdt
, pathp
);
274 if (nodeoffset
< 0) {
276 * Not found or something else bad happened.
278 printf ("libfdt fdt_path_offset() returned %s\n",
279 fdt_strerror(nodeoffset
));
286 ptmp
= fdt_getprop(working_fdt
, nodeoffset
, prop
, &len
);
288 printf("prop (%s) not found!\n", prop
);
291 if (len
> SCRATCHPAD
) {
292 printf("prop (%d) doesn't fit in scratchpad!\n",
296 memcpy(data
, ptmp
, len
);
297 ret
= fdt_parse_prop(&argv
[4], argc
- 4, data
, &len
);
302 ret
= fdt_setprop(working_fdt
, nodeoffset
, prop
, data
, len
);
304 printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret
));
308 /********************************************************************
309 * Get the value of a property in the working_fdt.
310 ********************************************************************/
311 } else if (argv
[1][0] == 'g') {
312 char *subcmd
; /* sub-command */
313 char *pathp
; /* path */
314 char *prop
; /* property */
315 char *var
; /* variable to store result */
316 int nodeoffset
; /* node offset from libfdt */
317 const void *nodep
; /* property node pointer */
318 int len
= 0; /* new length of the property */
321 * Parameters: Node path, property, optional value.
324 return CMD_RET_USAGE
;
328 if (argc
< 6 && subcmd
[0] != 's')
329 return CMD_RET_USAGE
;
335 nodeoffset
= fdt_path_offset(working_fdt
, pathp
);
336 if (nodeoffset
< 0) {
338 * Not found or something else bad happened.
340 printf("libfdt fdt_path_offset() returned %s\n",
341 fdt_strerror(nodeoffset
));
345 if (subcmd
[0] == 'n' || (subcmd
[0] == 's' && argc
== 5)) {
347 int startDepth
= fdt_node_depth(
348 working_fdt
, nodeoffset
);
349 int curDepth
= startDepth
;
351 int nextNodeOffset
= fdt_next_node(
352 working_fdt
, nodeoffset
, &curDepth
);
354 if (subcmd
[0] == 'n')
355 reqIndex
= simple_strtoul(argv
[5], NULL
, 16);
357 while (curDepth
> startDepth
) {
358 if (curDepth
== startDepth
+ 1)
360 if (subcmd
[0] == 'n' && curIndex
== reqIndex
) {
361 const char *node_name
;
363 node_name
= fdt_get_name(working_fdt
,
366 env_set(var
, node_name
);
369 nextNodeOffset
= fdt_next_node(
370 working_fdt
, nextNodeOffset
, &curDepth
);
371 if (nextNodeOffset
< 0)
374 if (subcmd
[0] == 's') {
375 /* get the num nodes at this level */
376 env_set_ulong(var
, curIndex
+ 1);
378 /* node index not found */
379 printf("libfdt node not found\n");
384 working_fdt
, nodeoffset
, prop
, &len
);
386 /* no property value */
389 } else if (nodep
&& len
> 0) {
390 if (subcmd
[0] == 'v') {
393 ret
= fdt_value_env_set(nodep
, len
,
397 } else if (subcmd
[0] == 'a') {
401 sprintf(buf
, "0x%p", nodep
);
403 } else if (subcmd
[0] == 's') {
407 sprintf(buf
, "0x%08X", len
);
410 return CMD_RET_USAGE
;
413 printf("libfdt fdt_getprop(): %s\n",
420 * Print (recursive) / List (single level)
422 } else if ((argv
[1][0] == 'p') || (argv
[1][0] == 'l')) {
423 int depth
= MAX_LEVEL
; /* how deep to print */
424 char *pathp
; /* path */
425 char *prop
; /* property */
426 int ret
; /* return value */
427 static char root
[2] = "/";
430 * list is an alias for print, but limited to 1 level
432 if (argv
[1][0] == 'l') {
437 * Get the starting path. The root node is an oddball,
438 * the offset is zero and has no name.
449 ret
= fdt_print(pathp
, prop
, depth
);
454 * Remove a property/node
456 } else if (strncmp(argv
[1], "rm", 2) == 0) {
457 int nodeoffset
; /* node offset from libfdt */
461 * Get the path. The root node is an oddball, the offset
462 * is zero and has no name.
464 nodeoffset
= fdt_path_offset (working_fdt
, argv
[2]);
465 if (nodeoffset
< 0) {
467 * Not found or something else bad happened.
469 printf ("libfdt fdt_path_offset() returned %s\n",
470 fdt_strerror(nodeoffset
));
474 * Do the delete. A fourth parameter means delete a property,
475 * otherwise delete the node.
478 err
= fdt_delprop(working_fdt
, nodeoffset
, argv
[3]);
480 printf("libfdt fdt_delprop(): %s\n",
485 err
= fdt_del_node(working_fdt
, nodeoffset
);
487 printf("libfdt fdt_del_node(): %s\n",
494 * Display header info
496 } else if (argv
[1][0] == 'h') {
497 u32 version
= fdt_version(working_fdt
);
498 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt
));
499 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt
),
500 fdt_totalsize(working_fdt
));
501 printf("off_dt_struct:\t\t0x%x\n",
502 fdt_off_dt_struct(working_fdt
));
503 printf("off_dt_strings:\t\t0x%x\n",
504 fdt_off_dt_strings(working_fdt
));
505 printf("off_mem_rsvmap:\t\t0x%x\n",
506 fdt_off_mem_rsvmap(working_fdt
));
507 printf("version:\t\t%d\n", version
);
508 printf("last_comp_version:\t%d\n",
509 fdt_last_comp_version(working_fdt
));
511 printf("boot_cpuid_phys:\t0x%x\n",
512 fdt_boot_cpuid_phys(working_fdt
));
514 printf("size_dt_strings:\t0x%x\n",
515 fdt_size_dt_strings(working_fdt
));
517 printf("size_dt_struct:\t\t0x%x\n",
518 fdt_size_dt_struct(working_fdt
));
519 printf("number mem_rsv:\t\t0x%x\n",
520 fdt_num_mem_rsv(working_fdt
));
526 } else if (strncmp(argv
[1], "boo", 3) == 0) {
527 unsigned long tmp
= simple_strtoul(argv
[2], NULL
, 16);
528 fdt_set_boot_cpuid_phys(working_fdt
, tmp
);
533 } else if (strncmp(argv
[1], "me", 2) == 0) {
536 addr
= simple_strtoull(argv
[2], NULL
, 16);
537 size
= simple_strtoull(argv
[3], NULL
, 16);
538 err
= fdt_fixup_memory(working_fdt
, addr
, size
);
543 * mem reserve commands
545 } else if (strncmp(argv
[1], "rs", 2) == 0) {
546 if (argv
[2][0] == 'p') {
548 int total
= fdt_num_mem_rsv(working_fdt
);
550 printf("index\t\t start\t\t size\n");
551 printf("-------------------------------"
552 "-----------------\n");
553 for (j
= 0; j
< total
; j
++) {
554 err
= fdt_get_mem_rsv(working_fdt
, j
, &addr
, &size
);
556 printf("libfdt fdt_get_mem_rsv(): %s\n",
560 printf(" %x\t%08x%08x\t%08x%08x\n", j
,
562 (u32
)(addr
& 0xffffffff),
564 (u32
)(size
& 0xffffffff));
566 } else if (argv
[2][0] == 'a') {
569 addr
= simple_strtoull(argv
[3], NULL
, 16);
570 size
= simple_strtoull(argv
[4], NULL
, 16);
571 err
= fdt_add_mem_rsv(working_fdt
, addr
, size
);
574 printf("libfdt fdt_add_mem_rsv(): %s\n",
578 } else if (argv
[2][0] == 'd') {
579 unsigned long idx
= simple_strtoul(argv
[3], NULL
, 16);
580 int err
= fdt_del_mem_rsv(working_fdt
, idx
);
583 printf("libfdt fdt_del_mem_rsv(): %s\n",
588 /* Unrecognized command */
589 return CMD_RET_USAGE
;
592 #ifdef CONFIG_OF_BOARD_SETUP
593 /* Call the board-specific fixup routine */
594 else if (strncmp(argv
[1], "boa", 3) == 0) {
595 int err
= ft_board_setup(working_fdt
, gd
->bd
);
598 printf("Failed to update board information in FDT: %s\n",
600 return CMD_RET_FAILURE
;
604 /* Create a chosen node */
605 else if (strncmp(argv
[1], "cho", 3) == 0) {
606 unsigned long initrd_start
= 0, initrd_end
= 0;
608 if ((argc
!= 2) && (argc
!= 4))
609 return CMD_RET_USAGE
;
612 initrd_start
= simple_strtoul(argv
[2], NULL
, 16);
613 initrd_end
= simple_strtoul(argv
[3], NULL
, 16);
616 fdt_chosen(working_fdt
);
617 fdt_initrd(working_fdt
, initrd_start
, initrd_end
);
619 #if defined(CONFIG_FIT_SIGNATURE)
620 } else if (strncmp(argv
[1], "che", 3) == 0) {
624 struct fdt_header
*blob
;
627 return CMD_RET_FAILURE
;
630 addr
= simple_strtoul(argv
[2], NULL
, 16);
631 blob
= map_sysmem(addr
, 0);
633 blob
= (struct fdt_header
*)gd
->fdt_blob
;
635 if (!fdt_valid(&blob
))
639 cfg_noffset
= fit_conf_get_node(working_fdt
, NULL
);
641 printf("Could not find configuration node: %s\n",
642 fdt_strerror(cfg_noffset
));
643 return CMD_RET_FAILURE
;
646 ret
= fit_config_verify(working_fdt
, cfg_noffset
);
648 return CMD_RET_SUCCESS
;
650 return CMD_RET_FAILURE
;
654 #ifdef CONFIG_OF_LIBFDT_OVERLAY
655 /* apply an overlay */
656 else if (strncmp(argv
[1], "ap", 2) == 0) {
658 struct fdt_header
*blob
;
662 return CMD_RET_USAGE
;
665 return CMD_RET_FAILURE
;
667 addr
= simple_strtoul(argv
[2], NULL
, 16);
668 blob
= map_sysmem(addr
, 0);
669 if (!fdt_valid(&blob
))
670 return CMD_RET_FAILURE
;
672 ret
= fdt_overlay_apply(working_fdt
, blob
);
674 printf("fdt_overlay_apply(): %s\n", fdt_strerror(ret
));
675 return CMD_RET_FAILURE
;
680 else if (strncmp(argv
[1], "re", 2) == 0) {
683 extrasize
= simple_strtoul(argv
[2], NULL
, 16);
686 fdt_shrink_to_minimum(working_fdt
, extrasize
);
689 /* Unrecognized command */
690 return CMD_RET_USAGE
;
696 /****************************************************************************/
699 * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
701 * @blobp: Pointer to FDT pointer
702 * @return 1 if OK, 0 if bad (in which case *blobp is set to NULL)
704 static int fdt_valid(struct fdt_header
**blobp
)
706 const void *blob
= *blobp
;
710 printf ("The address of the fdt is invalid (NULL).\n");
714 err
= fdt_check_header(blob
);
716 return 1; /* valid */
719 printf("libfdt fdt_check_header(): %s", fdt_strerror(err
));
721 * Be more informative on bad version.
723 if (err
== -FDT_ERR_BADVERSION
) {
724 if (fdt_version(blob
) <
725 FDT_FIRST_SUPPORTED_VERSION
) {
726 printf (" - too old, fdt %d < %d",
728 FDT_FIRST_SUPPORTED_VERSION
);
730 if (fdt_last_comp_version(blob
) >
731 FDT_LAST_SUPPORTED_VERSION
) {
732 printf (" - too new, fdt %d > %d",
734 FDT_LAST_SUPPORTED_VERSION
);
744 /****************************************************************************/
747 * Parse the user's input, partially heuristic. Valid formats:
748 * <0x00112233 4 05> - an array of cells. Numbers follow standard
750 * [00 11 22 .. nn] - byte stream
751 * "string" - If the the value doesn't start with "<" or "[", it is
752 * treated as a string. Note that the quotes are
753 * stripped by the parser before we get the string.
754 * newval: An array of strings containing the new property as specified
755 * on the command line
756 * count: The number of strings in the array
757 * data: A bytestream to be placed in the property
758 * len: The length of the resulting bytestream
760 static int fdt_parse_prop(char * const *newval
, int count
, char *data
, int *len
)
762 char *cp
; /* temporary char pointer */
763 char *newp
; /* temporary newval char pointer */
764 unsigned long tmp
; /* holds converted values */
770 /* An array of cells */
773 while ((*newp
!= '>') && (stridx
< count
)) {
775 * Keep searching until we find that last ">"
776 * That way users don't have to escape the spaces
779 newp
= newval
[++stridx
];
784 tmp
= simple_strtoul(cp
, &newp
, 0);
786 *(fdt32_t
*)data
= cpu_to_fdt32(tmp
);
793 /* If the ptr didn't advance, something went wrong */
794 if ((newp
- cp
) <= 0) {
795 printf("Sorry, I could not convert \"%s\"\n",
805 printf("Unexpected character '%c'\n", *newp
);
808 } else if (*newp
== '[') {
810 * Byte stream. Convert the values.
813 while ((stridx
< count
) && (*newp
!= ']')) {
817 newp
= newval
[++stridx
];
820 if (!isxdigit(*newp
))
822 tmp
= simple_strtoul(newp
, &newp
, 16);
823 *data
++ = tmp
& 0xFF;
827 printf("Unexpected character '%c'\n", *newp
);
832 * Assume it is one or more strings. Copy it into our
833 * data area for convenience (including the
834 * terminating '\0's).
836 while (stridx
< count
) {
837 size_t length
= strlen(newp
) + 1;
841 newp
= newval
[++stridx
];
847 /****************************************************************************/
850 * Heuristic to guess if this is a string or concatenated strings.
853 static int is_printable_string(const void *data
, int len
)
855 const char *s
= data
;
857 /* zero length is not */
861 /* must terminate with zero or '\n' */
862 if (s
[len
- 1] != '\0' && s
[len
- 1] != '\n')
865 /* printable or a null byte (concatenated strings) */
866 while (((*s
== '\0') || isprint(*s
) || isspace(*s
)) && (len
> 0)) {
868 * If we see a null, there are three possibilities:
869 * 1) If len == 1, it is the end of the string, printable
870 * 2) Next character also a null, not printable.
871 * 3) Next character not a null, continue to check.
883 /* Not the null termination, or not done yet: not printable */
884 if (*s
!= '\0' || (len
!= 0))
892 * Print the property in the best format, a heuristic guess. Print as
893 * a string, concatenated strings, a byte, word, double word, or (if all
894 * else fails) it is printed as a stream of bytes.
896 static void print_data(const void *data
, int len
)
900 /* no data, don't print */
905 * It is a string, but it may have multiple strings (embedded '\0's).
907 if (is_printable_string(data
, len
)) {
914 j
+= strlen(data
) + 1;
915 data
+= strlen(data
) + 1;
922 if (len
> CMD_FDT_MAX_DUMP
)
923 printf("* 0x%p [0x%08x]", data
, len
);
928 for (j
= 0, p
= data
; j
< len
/4; j
++)
929 printf("0x%08x%s", fdt32_to_cpu(p
[j
]),
930 j
< (len
/4 - 1) ? " " : "");
933 } else { /* anything else... hexdump */
934 if (len
> CMD_FDT_MAX_DUMP
)
935 printf("* 0x%p [0x%08x]", data
, len
);
940 for (j
= 0, s
= data
; j
< len
; j
++)
941 printf("%02x%s", s
[j
], j
< len
- 1 ? " " : "");
947 /****************************************************************************/
950 * Recursively print (a portion of) the working_fdt. The depth parameter
951 * determines how deeply nested the fdt is printed.
953 static int fdt_print(const char *pathp
, char *prop
, int depth
)
955 static char tabs
[MAX_LEVEL
+1] =
956 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
957 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
958 const void *nodep
; /* property node pointer */
959 int nodeoffset
; /* node offset from libfdt */
960 int nextoffset
; /* next node offset from libfdt */
961 uint32_t tag
; /* tag */
962 int len
; /* length of the property */
963 int level
= 0; /* keep track of nesting level */
964 const struct fdt_property
*fdt_prop
;
966 nodeoffset
= fdt_path_offset (working_fdt
, pathp
);
967 if (nodeoffset
< 0) {
969 * Not found or something else bad happened.
971 printf ("libfdt fdt_path_offset() returned %s\n",
972 fdt_strerror(nodeoffset
));
976 * The user passed in a property as well as node path.
977 * Print only the given property and then return.
980 nodep
= fdt_getprop (working_fdt
, nodeoffset
, prop
, &len
);
982 /* no property value */
983 printf("%s %s\n", pathp
, prop
);
985 } else if (nodep
&& len
> 0) {
986 printf("%s = ", prop
);
987 print_data (nodep
, len
);
991 printf ("libfdt fdt_getprop(): %s\n",
998 * The user passed in a node path and no property,
999 * print the node and all subnodes.
1002 tag
= fdt_next_tag(working_fdt
, nodeoffset
, &nextoffset
);
1004 case FDT_BEGIN_NODE
:
1005 pathp
= fdt_get_name(working_fdt
, nodeoffset
, NULL
);
1006 if (level
<= depth
) {
1008 pathp
= "/* NULL pointer error */";
1010 pathp
= "/"; /* root is nameless */
1012 &tabs
[MAX_LEVEL
- level
], pathp
);
1015 if (level
>= MAX_LEVEL
) {
1016 printf("Nested too deep, aborting.\n");
1023 printf("%s};\n", &tabs
[MAX_LEVEL
- level
]);
1025 level
= -1; /* exit the loop */
1029 fdt_prop
= fdt_offset_ptr(working_fdt
, nodeoffset
,
1031 pathp
= fdt_string(working_fdt
,
1032 fdt32_to_cpu(fdt_prop
->nameoff
));
1033 len
= fdt32_to_cpu(fdt_prop
->len
);
1034 nodep
= fdt_prop
->data
;
1036 printf ("libfdt fdt_getprop(): %s\n",
1039 } else if (len
== 0) {
1040 /* the property has no value */
1043 &tabs
[MAX_LEVEL
- level
],
1046 if (level
<= depth
) {
1048 &tabs
[MAX_LEVEL
- level
],
1050 print_data (nodep
, len
);
1056 printf("%s/* NOP */\n", &tabs
[MAX_LEVEL
- level
]);
1062 printf("Unknown tag 0x%08X\n", tag
);
1065 nodeoffset
= nextoffset
;
1070 /********************************************************************/
1071 #ifdef CONFIG_SYS_LONGHELP
1072 static char fdt_help_text
[] =
1073 "addr [-c] <addr> [<length>] - Set the [control] fdt location to <addr>\n"
1074 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1075 "fdt apply <addr> - Apply overlay to the DT\n"
1077 #ifdef CONFIG_OF_BOARD_SETUP
1078 "fdt boardsetup - Do board-specific set up\n"
1080 #ifdef CONFIG_OF_SYSTEM_SETUP
1081 "fdt systemsetup - Do system-specific set up\n"
1083 "fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1084 "fdt resize [<extrasize>] - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
1085 "fdt print <path> [<prop>] - Recursive print starting at <path>\n"
1086 "fdt list <path> [<prop>] - Print one level starting at <path>\n"
1087 "fdt get value <var> <path> <prop> - Get <property> and store in <var>\n"
1088 "fdt get name <var> <path> <index> - Get name of node <index> and store in <var>\n"
1089 "fdt get addr <var> <path> <prop> - Get start address of <property> and store in <var>\n"
1090 "fdt get size <var> <path> [<prop>] - Get size of [<property>] or num nodes and store in <var>\n"
1091 "fdt set <path> <prop> [<val>] - Set <property> [to <val>]\n"
1092 "fdt mknode <path> <node> - Create a new node after <path>\n"
1093 "fdt rm <path> [<prop>] - Delete the node or <property>\n"
1094 "fdt header - Display header info\n"
1095 "fdt bootcpu <id> - Set boot cpuid\n"
1096 "fdt memory <addr> <size> - Add/Update memory node\n"
1097 "fdt rsvmem print - Show current mem reserves\n"
1098 "fdt rsvmem add <addr> <size> - Add a mem reserve\n"
1099 "fdt rsvmem delete <index> - Delete a mem reserves\n"
1100 "fdt chosen [<start> <end>] - Add/update the /chosen branch in the tree\n"
1101 " <start>/<end> - initrd start/end addr\n"
1102 #if defined(CONFIG_FIT_SIGNATURE)
1103 "fdt checksign [<addr>] - check FIT signature\n"
1104 " <start> - addr of key blob\n"
1105 " default gd->fdt_blob\n"
1107 "NOTE: Dereference aliases by omitting the leading '/', "
1108 "e.g. fdt print ethernet0.";
1112 fdt
, 255, 0, do_fdt
,
1113 "flattened device tree utility commands", fdt_help_text