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 * See file CREDITS for list of people who contributed to this
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.
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.
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,
29 #include <linux/ctype.h>
30 #include <linux/types.h>
31 #include <asm/global_data.h>
33 #include <fdt_support.h>
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
43 * Global data (for the gd->bd)
45 DECLARE_GLOBAL_DATA_PTR
;
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
);
53 * The working_fdt points to our working flattened device tree.
55 struct fdt_header
*working_fdt
;
57 void set_working_fdt_addr(void *addr
)
61 buf
= map_sysmem((ulong
)addr
, 0);
63 setenv_addr("fdtaddr", addr
);
67 * Get a value from the fdt and format it to be set in the environment
69 static int fdt_value_setenv(const void *nodep
, int len
, const char *var
)
71 if (is_printable_string(nodep
, len
))
72 setenv(var
, (void *)nodep
);
76 sprintf(buf
, "0x%08X", *(uint32_t *)nodep
);
78 } else if (len
%4 == 0 && len
<= 20) {
79 /* Needed to print things like sha1 hashes. */
83 for (i
= 0; i
< len
; i
+= sizeof(unsigned int))
84 sprintf(buf
+ (i
* 2), "%08x",
85 *(unsigned int *)(nodep
+ i
));
88 printf("error: unprintable value\n");
95 * Flattened Device Tree command, see the help for parameter definitions.
97 static int do_fdt(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
100 return CMD_RET_USAGE
;
103 * Set the address of the fdt
105 if (argv
[1][0] == 'a') {
108 struct fdt_header
*blob
;
110 * Set the address [and length] of the fdt.
114 /* Temporary #ifdef - some archs don't have fdt_blob yet */
115 #ifdef CONFIG_OF_CONTROL
116 if (argc
&& !strcmp(*argv
, "-c")) {
124 blob
= (struct fdt_header
*)gd
->fdt_blob
;
127 if (!blob
|| !fdt_valid(&blob
))
129 printf("The address of the fdt is %#08lx\n",
130 control
? (ulong
)blob
:
131 getenv_hex("fdtaddr", 0));
135 addr
= simple_strtoul(argv
[0], NULL
, 16);
136 blob
= map_sysmem(addr
, 0);
137 if (!fdt_valid(&blob
))
142 set_working_fdt_addr(blob
);
148 * Optional new length
150 len
= simple_strtoul(argv
[1], NULL
, 16);
151 if (len
< fdt_totalsize(blob
)) {
152 printf ("New length %d < existing length %d, "
154 len
, fdt_totalsize(blob
));
157 * Open in place with a new length.
159 err
= fdt_open_into(blob
, blob
, len
);
161 printf ("libfdt fdt_open_into(): %s\n",
167 return CMD_RET_SUCCESS
;
172 "No FDT memory address configured. Please configure\n"
173 "the FDT address via \"fdt addr <address>\" command.\n"
175 return CMD_RET_FAILURE
;
179 * Move the working_fdt
181 if (strncmp(argv
[1], "mo", 2) == 0) {
182 struct fdt_header
*newaddr
;
187 return CMD_RET_USAGE
;
190 * Set the address and length of the fdt.
192 working_fdt
= (struct fdt_header
*)simple_strtoul(argv
[2], NULL
, 16);
193 if (!fdt_valid(&working_fdt
))
196 newaddr
= (struct fdt_header
*)simple_strtoul(argv
[3],NULL
,16);
199 * If the user specifies a length, use that. Otherwise use the
203 len
= fdt_totalsize(working_fdt
);
205 len
= simple_strtoul(argv
[4], NULL
, 16);
206 if (len
< fdt_totalsize(working_fdt
)) {
207 printf ("New length 0x%X < existing length "
209 len
, fdt_totalsize(working_fdt
));
215 * Copy to the new location.
217 err
= fdt_open_into(working_fdt
, newaddr
, len
);
219 printf ("libfdt fdt_open_into(): %s\n",
223 working_fdt
= newaddr
;
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 */
235 * Parameters: Node path, new node to be appended to the path.
238 return CMD_RET_USAGE
;
243 nodeoffset
= fdt_path_offset (working_fdt
, pathp
);
244 if (nodeoffset
< 0) {
246 * Not found or something else bad happened.
248 printf ("libfdt fdt_path_offset() returned %s\n",
249 fdt_strerror(nodeoffset
));
252 err
= fdt_add_subnode(working_fdt
, nodeoffset
, nodep
);
254 printf ("libfdt fdt_add_subnode(): %s\n",
260 * Set the value of a property in the working_fdt.
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 */
271 * Parameters: Node path, property, optional value.
274 return CMD_RET_USAGE
;
281 ret
= fdt_parse_prop(&argv
[4], argc
- 4, data
, &len
);
286 nodeoffset
= fdt_path_offset (working_fdt
, pathp
);
287 if (nodeoffset
< 0) {
289 * Not found or something else bad happened.
291 printf ("libfdt fdt_path_offset() returned %s\n",
292 fdt_strerror(nodeoffset
));
296 ret
= fdt_setprop(working_fdt
, nodeoffset
, prop
, data
, len
);
298 printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret
));
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 */
315 * Parameters: Node path, property, optional value.
318 return CMD_RET_USAGE
;
322 if (argc
< 6 && subcmd
[0] != 's')
323 return CMD_RET_USAGE
;
329 nodeoffset
= fdt_path_offset(working_fdt
, pathp
);
330 if (nodeoffset
< 0) {
332 * Not found or something else bad happened.
334 printf("libfdt fdt_path_offset() returned %s\n",
335 fdt_strerror(nodeoffset
));
339 if (subcmd
[0] == 'n' || (subcmd
[0] == 's' && argc
== 5)) {
341 int startDepth
= fdt_node_depth(
342 working_fdt
, nodeoffset
);
343 int curDepth
= startDepth
;
345 int nextNodeOffset
= fdt_next_node(
346 working_fdt
, nodeoffset
, &curDepth
);
348 if (subcmd
[0] == 'n')
349 reqIndex
= simple_strtoul(argv
[5], NULL
, 16);
351 while (curDepth
> startDepth
) {
352 if (curDepth
== startDepth
+ 1)
354 if (subcmd
[0] == 'n' && curIndex
== reqIndex
) {
355 const char *nodeName
= fdt_get_name(
356 working_fdt
, nextNodeOffset
, NULL
);
358 setenv(var
, (char *)nodeName
);
361 nextNodeOffset
= fdt_next_node(
362 working_fdt
, nextNodeOffset
, &curDepth
);
363 if (nextNodeOffset
< 0)
366 if (subcmd
[0] == 's') {
367 /* get the num nodes at this level */
368 setenv_ulong(var
, curIndex
+ 1);
370 /* node index not found */
371 printf("libfdt node not found\n");
376 working_fdt
, nodeoffset
, prop
, &len
);
378 /* no property value */
381 } else if (len
> 0) {
382 if (subcmd
[0] == 'v') {
385 ret
= fdt_value_setenv(nodep
, len
, var
);
388 } else if (subcmd
[0] == 'a') {
392 sprintf(buf
, "0x%p", nodep
);
394 } else if (subcmd
[0] == 's') {
398 sprintf(buf
, "0x%08X", len
);
401 return CMD_RET_USAGE
;
404 printf("libfdt fdt_getprop(): %s\n",
411 * Print (recursive) / List (single level)
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] = "/";
421 * list is an alias for print, but limited to 1 level
423 if (argv
[1][0] == 'l') {
428 * Get the starting path. The root node is an oddball,
429 * the offset is zero and has no name.
440 ret
= fdt_print(pathp
, prop
, depth
);
445 * Remove a property/node
447 } else if (strncmp(argv
[1], "rm", 2) == 0) {
448 int nodeoffset
; /* node offset from libfdt */
452 * Get the path. The root node is an oddball, the offset
453 * is zero and has no name.
455 nodeoffset
= fdt_path_offset (working_fdt
, argv
[2]);
456 if (nodeoffset
< 0) {
458 * Not found or something else bad happened.
460 printf ("libfdt fdt_path_offset() returned %s\n",
461 fdt_strerror(nodeoffset
));
465 * Do the delete. A fourth parameter means delete a property,
466 * otherwise delete the node.
469 err
= fdt_delprop(working_fdt
, nodeoffset
, argv
[3]);
471 printf("libfdt fdt_delprop(): %s\n",
476 err
= fdt_del_node(working_fdt
, nodeoffset
);
478 printf("libfdt fdt_del_node(): %s\n",
485 * Display header info
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
));
502 printf("boot_cpuid_phys:\t0x%x\n",
503 fdt_boot_cpuid_phys(working_fdt
));
505 printf("size_dt_strings:\t0x%x\n",
506 fdt_size_dt_strings(working_fdt
));
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
));
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
);
524 } else if (strncmp(argv
[1], "me", 2) == 0) {
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
);
534 * mem reserve commands
536 } else if (strncmp(argv
[1], "rs", 2) == 0) {
537 if (argv
[2][0] == 'p') {
539 int total
= fdt_num_mem_rsv(working_fdt
);
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
);
547 printf("libfdt fdt_get_mem_rsv(): %s\n",
551 printf(" %x\t%08x%08x\t%08x%08x\n", j
,
553 (u32
)(addr
& 0xffffffff),
555 (u32
)(size
& 0xffffffff));
557 } else if (argv
[2][0] == 'a') {
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
);
565 printf("libfdt fdt_add_mem_rsv(): %s\n",
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
);
574 printf("libfdt fdt_del_mem_rsv(): %s\n",
579 /* Unrecognized command */
580 return CMD_RET_USAGE
;
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
);
588 /* Create a chosen node */
589 else if (argv
[1][0] == 'c') {
590 unsigned long initrd_start
= 0, initrd_end
= 0;
592 if ((argc
!= 2) && (argc
!= 4))
593 return CMD_RET_USAGE
;
596 initrd_start
= simple_strtoul(argv
[2], NULL
, 16);
597 initrd_end
= simple_strtoul(argv
[3], NULL
, 16);
600 fdt_chosen(working_fdt
, 1);
601 fdt_initrd(working_fdt
, initrd_start
, initrd_end
, 1);
604 else if (strncmp(argv
[1], "re", 2) == 0) {
605 fdt_resize(working_fdt
);
608 /* Unrecognized command */
609 return CMD_RET_USAGE
;
615 /****************************************************************************/
618 * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
620 * @blobp: Pointer to FDT pointer
621 * @return 1 if OK, 0 if bad (in which case *blobp is set to NULL)
623 static int fdt_valid(struct fdt_header
**blobp
)
625 const void *blob
= *blobp
;
629 printf ("The address of the fdt is invalid (NULL).\n");
633 err
= fdt_check_header(blob
);
635 return 1; /* valid */
638 printf("libfdt fdt_check_header(): %s", fdt_strerror(err
));
640 * Be more informative on bad version.
642 if (err
== -FDT_ERR_BADVERSION
) {
643 if (fdt_version(blob
) <
644 FDT_FIRST_SUPPORTED_VERSION
) {
645 printf (" - too old, fdt %d < %d",
647 FDT_FIRST_SUPPORTED_VERSION
);
649 if (fdt_last_comp_version(blob
) >
650 FDT_LAST_SUPPORTED_VERSION
) {
651 printf (" - too new, fdt %d > %d",
653 FDT_LAST_SUPPORTED_VERSION
);
663 /****************************************************************************/
666 * Parse the user's input, partially heuristic. Valid formats:
667 * <0x00112233 4 05> - an array of cells. Numbers follow standard
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
679 static int fdt_parse_prop(char * const *newval
, int count
, char *data
, int *len
)
681 char *cp
; /* temporary char pointer */
682 char *newp
; /* temporary newval char pointer */
683 unsigned long tmp
; /* holds converted values */
689 /* An array of cells */
692 while ((*newp
!= '>') && (stridx
< count
)) {
694 * Keep searching until we find that last ">"
695 * That way users don't have to escape the spaces
698 newp
= newval
[++stridx
];
703 tmp
= simple_strtoul(cp
, &newp
, 0);
704 *(__be32
*)data
= __cpu_to_be32(tmp
);
708 /* If the ptr didn't advance, something went wrong */
709 if ((newp
- cp
) <= 0) {
710 printf("Sorry, I could not convert \"%s\"\n",
720 printf("Unexpected character '%c'\n", *newp
);
723 } else if (*newp
== '[') {
725 * Byte stream. Convert the values.
728 while ((stridx
< count
) && (*newp
!= ']')) {
732 newp
= newval
[++stridx
];
735 if (!isxdigit(*newp
))
737 tmp
= simple_strtoul(newp
, &newp
, 16);
738 *data
++ = tmp
& 0xFF;
742 printf("Unexpected character '%c'\n", *newp
);
747 * Assume it is one or more strings. Copy it into our
748 * data area for convenience (including the
749 * terminating '\0's).
751 while (stridx
< count
) {
752 size_t length
= strlen(newp
) + 1;
756 newp
= newval
[++stridx
];
762 /****************************************************************************/
765 * Heuristic to guess if this is a string or concatenated strings.
768 static int is_printable_string(const void *data
, int len
)
770 const char *s
= data
;
772 /* zero length is not */
776 /* must terminate with zero or '\n' */
777 if (s
[len
- 1] != '\0' && s
[len
- 1] != '\n')
780 /* printable or a null byte (concatenated strings) */
781 while (((*s
== '\0') || isprint(*s
) || isspace(*s
)) && (len
> 0)) {
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.
798 /* Not the null termination, or not done yet: not printable */
799 if (*s
!= '\0' || (len
!= 0))
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.
811 static void print_data(const void *data
, int len
)
815 /* no data, don't print */
820 * It is a string, but it may have multiple strings (embedded '\0's).
822 if (is_printable_string(data
, len
)) {
829 j
+= strlen(data
) + 1;
830 data
+= strlen(data
) + 1;
837 if (len
> CONFIG_CMD_FDT_MAX_DUMP
)
838 printf("* 0x%p [0x%08x]", data
, len
);
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) ? " " : "");
848 } else { /* anything else... hexdump */
849 if (len
> CONFIG_CMD_FDT_MAX_DUMP
)
850 printf("* 0x%p [0x%08x]", data
, len
);
855 for (j
= 0, s
= data
; j
< len
; j
++)
856 printf("%02x%s", s
[j
], j
< len
- 1 ? " " : "");
862 /****************************************************************************/
865 * Recursively print (a portion of) the working_fdt. The depth parameter
866 * determines how deeply nested the fdt is printed.
868 static int fdt_print(const char *pathp
, char *prop
, int depth
)
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
;
881 nodeoffset
= fdt_path_offset (working_fdt
, pathp
);
882 if (nodeoffset
< 0) {
884 * Not found or something else bad happened.
886 printf ("libfdt fdt_path_offset() returned %s\n",
887 fdt_strerror(nodeoffset
));
891 * The user passed in a property as well as node path.
892 * Print only the given property and then return.
895 nodep
= fdt_getprop (working_fdt
, nodeoffset
, prop
, &len
);
897 /* no property value */
898 printf("%s %s\n", pathp
, prop
);
900 } else if (len
> 0) {
901 printf("%s = ", prop
);
902 print_data (nodep
, len
);
906 printf ("libfdt fdt_getprop(): %s\n",
913 * The user passed in a node path and no property,
914 * print the node and all subnodes.
917 tag
= fdt_next_tag(working_fdt
, nodeoffset
, &nextoffset
);
920 pathp
= fdt_get_name(working_fdt
, nodeoffset
, NULL
);
921 if (level
<= depth
) {
923 pathp
= "/* NULL pointer error */";
925 pathp
= "/"; /* root is nameless */
927 &tabs
[MAX_LEVEL
- level
], pathp
);
930 if (level
>= MAX_LEVEL
) {
931 printf("Nested too deep, aborting.\n");
938 printf("%s};\n", &tabs
[MAX_LEVEL
- level
]);
940 level
= -1; /* exit the loop */
944 fdt_prop
= fdt_offset_ptr(working_fdt
, nodeoffset
,
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
;
951 printf ("libfdt fdt_getprop(): %s\n",
954 } else if (len
== 0) {
955 /* the property has no value */
958 &tabs
[MAX_LEVEL
- level
],
961 if (level
<= depth
) {
963 &tabs
[MAX_LEVEL
- level
],
965 print_data (nodep
, len
);
971 printf("%s/* NOP */\n", &tabs
[MAX_LEVEL
- level
]);
977 printf("Unknown tag 0x%08X\n", tag
);
980 nodeoffset
= nextoffset
;
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"
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.";
1016 fdt
, 255, 0, do_fdt
,
1017 "flattened device tree utility commands", fdt_help_text