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>
34 #include <fdt_support.h>
36 #define MAX_LEVEL 32 /* how deeply nested we will go */
37 #define SCRATCHPAD 1024 /* bytes of scratchpad memory */
40 * Global data (for the gd->bd)
42 DECLARE_GLOBAL_DATA_PTR
;
44 static int fdt_valid(void);
45 static int fdt_parse_prop(char **newval
, int count
, char *data
, int *len
);
46 static int fdt_print(const char *pathp
, char *prop
, int depth
);
49 * The working_fdt points to our working flattened device tree.
51 struct fdt_header
*working_fdt
;
53 void set_working_fdt_addr(void *addr
)
59 sprintf(buf
, "%lx", (unsigned long)addr
);
60 setenv("fdtaddr", buf
);
64 * Flattened Device Tree command, see the help for parameter definitions.
66 int do_fdt (cmd_tbl_t
* cmdtp
, int flag
, int argc
, char *argv
[])
73 /********************************************************************
74 * Set the address of the fdt
75 ********************************************************************/
76 if (argv
[1][0] == 'a') {
79 * Set the address [and length] of the fdt.
85 printf("The address of the fdt is %p\n", working_fdt
);
89 addr
= simple_strtoul(argv
[2], NULL
, 16);
90 set_working_fdt_addr((void *)addr
);
100 * Optional new length
102 len
= simple_strtoul(argv
[3], NULL
, 16);
103 if (len
< fdt_totalsize(working_fdt
)) {
104 printf ("New length %d < existing length %d, "
106 len
, fdt_totalsize(working_fdt
));
109 * Open in place with a new length.
111 err
= fdt_open_into(working_fdt
, working_fdt
, len
);
113 printf ("libfdt fdt_open_into(): %s\n",
119 /********************************************************************
120 * Move the working_fdt
121 ********************************************************************/
122 } else if (strncmp(argv
[1], "mo", 2) == 0) {
123 struct fdt_header
*newaddr
;
133 * Set the address and length of the fdt.
135 working_fdt
= (struct fdt_header
*)simple_strtoul(argv
[2], NULL
, 16);
140 newaddr
= (struct fdt_header
*)simple_strtoul(argv
[3],NULL
,16);
143 * If the user specifies a length, use that. Otherwise use the
147 len
= fdt_totalsize(working_fdt
);
149 len
= simple_strtoul(argv
[4], NULL
, 16);
150 if (len
< fdt_totalsize(working_fdt
)) {
151 printf ("New length 0x%X < existing length "
153 len
, fdt_totalsize(working_fdt
));
159 * Copy to the new location.
161 err
= fdt_open_into(working_fdt
, newaddr
, len
);
163 printf ("libfdt fdt_open_into(): %s\n",
167 working_fdt
= newaddr
;
169 /********************************************************************
171 ********************************************************************/
172 } else if (strncmp(argv
[1], "mk", 2) == 0) {
173 char *pathp
; /* path */
174 char *nodep
; /* new node to add */
175 int nodeoffset
; /* node offset from libfdt */
179 * Parameters: Node path, new node to be appended to the path.
189 nodeoffset
= fdt_path_offset (working_fdt
, pathp
);
190 if (nodeoffset
< 0) {
192 * Not found or something else bad happened.
194 printf ("libfdt fdt_path_offset() returned %s\n",
195 fdt_strerror(nodeoffset
));
198 err
= fdt_add_subnode(working_fdt
, nodeoffset
, nodep
);
200 printf ("libfdt fdt_add_subnode(): %s\n",
205 /********************************************************************
206 * Set the value of a property in the working_fdt.
207 ********************************************************************/
208 } else if (argv
[1][0] == 's') {
209 char *pathp
; /* path */
210 char *prop
; /* property */
211 int nodeoffset
; /* node offset from libfdt */
212 static char data
[SCRATCHPAD
]; /* storage for the property */
213 int len
; /* new length of the property */
214 int ret
; /* return value */
217 * Parameters: Node path, property, optional value.
229 ret
= fdt_parse_prop(&argv
[4], argc
- 4, data
, &len
);
234 nodeoffset
= fdt_path_offset (working_fdt
, pathp
);
235 if (nodeoffset
< 0) {
237 * Not found or something else bad happened.
239 printf ("libfdt fdt_path_offset() returned %s\n",
240 fdt_strerror(nodeoffset
));
244 ret
= fdt_setprop(working_fdt
, nodeoffset
, prop
, data
, len
);
246 printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret
));
250 /********************************************************************
251 * Print (recursive) / List (single level)
252 ********************************************************************/
253 } else if ((argv
[1][0] == 'p') || (argv
[1][0] == 'l')) {
254 int depth
= MAX_LEVEL
; /* how deep to print */
255 char *pathp
; /* path */
256 char *prop
; /* property */
257 int ret
; /* return value */
258 static char root
[2] = "/";
261 * list is an alias for print, but limited to 1 level
263 if (argv
[1][0] == 'l') {
268 * Get the starting path. The root node is an oddball,
269 * the offset is zero and has no name.
280 ret
= fdt_print(pathp
, prop
, depth
);
284 /********************************************************************
285 * Remove a property/node
286 ********************************************************************/
287 } else if (strncmp(argv
[1], "rm", 2) == 0) {
288 int nodeoffset
; /* node offset from libfdt */
292 * Get the path. The root node is an oddball, the offset
293 * is zero and has no name.
295 nodeoffset
= fdt_path_offset (working_fdt
, argv
[2]);
296 if (nodeoffset
< 0) {
298 * Not found or something else bad happened.
300 printf ("libfdt fdt_path_offset() returned %s\n",
301 fdt_strerror(nodeoffset
));
305 * Do the delete. A fourth parameter means delete a property,
306 * otherwise delete the node.
309 err
= fdt_delprop(working_fdt
, nodeoffset
, argv
[3]);
311 printf("libfdt fdt_delprop(): %s\n",
316 err
= fdt_del_node(working_fdt
, nodeoffset
);
318 printf("libfdt fdt_del_node(): %s\n",
324 /********************************************************************
325 * Display header info
326 ********************************************************************/
327 } else if (argv
[1][0] == 'h') {
328 u32 version
= fdt_version(working_fdt
);
329 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt
));
330 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt
),
331 fdt_totalsize(working_fdt
));
332 printf("off_dt_struct:\t\t0x%x\n",
333 fdt_off_dt_struct(working_fdt
));
334 printf("off_dt_strings:\t\t0x%x\n",
335 fdt_off_dt_strings(working_fdt
));
336 printf("off_mem_rsvmap:\t\t0x%x\n",
337 fdt_off_mem_rsvmap(working_fdt
));
338 printf("version:\t\t%d\n", version
);
339 printf("last_comp_version:\t%d\n",
340 fdt_last_comp_version(working_fdt
));
342 printf("boot_cpuid_phys:\t0x%x\n",
343 fdt_boot_cpuid_phys(working_fdt
));
345 printf("size_dt_strings:\t0x%x\n",
346 fdt_size_dt_strings(working_fdt
));
348 printf("size_dt_struct:\t\t0x%x\n",
349 fdt_size_dt_struct(working_fdt
));
350 printf("number mem_rsv:\t\t0x%x\n",
351 fdt_num_mem_rsv(working_fdt
));
354 /********************************************************************
356 ********************************************************************/
357 } else if (strncmp(argv
[1], "boo", 3) == 0) {
358 unsigned long tmp
= simple_strtoul(argv
[2], NULL
, 16);
359 fdt_set_boot_cpuid_phys(working_fdt
, tmp
);
361 /********************************************************************
363 ********************************************************************/
364 } else if (strncmp(argv
[1], "me", 2) == 0) {
367 addr
= simple_strtoull(argv
[2], NULL
, 16);
368 size
= simple_strtoull(argv
[3], NULL
, 16);
369 err
= fdt_fixup_memory(working_fdt
, addr
, size
);
373 /********************************************************************
374 * mem reserve commands
375 ********************************************************************/
376 } else if (strncmp(argv
[1], "rs", 2) == 0) {
377 if (argv
[2][0] == 'p') {
379 int total
= fdt_num_mem_rsv(working_fdt
);
381 printf("index\t\t start\t\t size\n");
382 printf("-------------------------------"
383 "-----------------\n");
384 for (j
= 0; j
< total
; j
++) {
385 err
= fdt_get_mem_rsv(working_fdt
, j
, &addr
, &size
);
387 printf("libfdt fdt_get_mem_rsv(): %s\n",
391 printf(" %x\t%08x%08x\t%08x%08x\n", j
,
393 (u32
)(addr
& 0xffffffff),
395 (u32
)(size
& 0xffffffff));
397 } else if (argv
[2][0] == 'a') {
400 addr
= simple_strtoull(argv
[3], NULL
, 16);
401 size
= simple_strtoull(argv
[4], NULL
, 16);
402 err
= fdt_add_mem_rsv(working_fdt
, addr
, size
);
405 printf("libfdt fdt_add_mem_rsv(): %s\n",
409 } else if (argv
[2][0] == 'd') {
410 unsigned long idx
= simple_strtoul(argv
[3], NULL
, 16);
411 int err
= fdt_del_mem_rsv(working_fdt
, idx
);
414 printf("libfdt fdt_del_mem_rsv(): %s\n",
419 /* Unrecognized command */
424 #ifdef CONFIG_OF_BOARD_SETUP
425 /* Call the board-specific fixup routine */
426 else if (strncmp(argv
[1], "boa", 3) == 0)
427 ft_board_setup(working_fdt
, gd
->bd
);
429 /* Create a chosen node */
430 else if (argv
[1][0] == 'c') {
431 unsigned long initrd_start
= 0, initrd_end
= 0;
433 if ((argc
!= 2) && (argc
!= 4)) {
439 initrd_start
= simple_strtoul(argv
[2], NULL
, 16);
440 initrd_end
= simple_strtoul(argv
[3], NULL
, 16);
443 fdt_chosen(working_fdt
, 1);
444 fdt_initrd(working_fdt
, initrd_start
, initrd_end
, 1);
447 else if (strncmp(argv
[1], "re", 2) == 0) {
448 fdt_resize(working_fdt
);
451 /* Unrecognized command */
459 /****************************************************************************/
461 static int fdt_valid(void)
465 if (working_fdt
== NULL
) {
466 printf ("The address of the fdt is invalid (NULL).\n");
470 err
= fdt_check_header(working_fdt
);
472 return 1; /* valid */
475 printf("libfdt fdt_check_header(): %s", fdt_strerror(err
));
477 * Be more informative on bad version.
479 if (err
== -FDT_ERR_BADVERSION
) {
480 if (fdt_version(working_fdt
) <
481 FDT_FIRST_SUPPORTED_VERSION
) {
482 printf (" - too old, fdt %d < %d",
483 fdt_version(working_fdt
),
484 FDT_FIRST_SUPPORTED_VERSION
);
487 if (fdt_last_comp_version(working_fdt
) >
488 FDT_LAST_SUPPORTED_VERSION
) {
489 printf (" - too new, fdt %d > %d",
490 fdt_version(working_fdt
),
491 FDT_LAST_SUPPORTED_VERSION
);
502 /****************************************************************************/
505 * Parse the user's input, partially heuristic. Valid formats:
506 * <0x00112233 4 05> - an array of cells. Numbers follow standard
508 * [00 11 22 .. nn] - byte stream
509 * "string" - If the the value doesn't start with "<" or "[", it is
510 * treated as a string. Note that the quotes are
511 * stripped by the parser before we get the string.
512 * newval: An array of strings containing the new property as specified
513 * on the command line
514 * count: The number of strings in the array
515 * data: A bytestream to be placed in the property
516 * len: The length of the resulting bytestream
518 static int fdt_parse_prop(char **newval
, int count
, char *data
, int *len
)
520 char *cp
; /* temporary char pointer */
521 char *newp
; /* temporary newval char pointer */
522 unsigned long tmp
; /* holds converted values */
528 /* An array of cells */
531 while ((*newp
!= '>') && (stridx
< count
)) {
533 * Keep searching until we find that last ">"
534 * That way users don't have to escape the spaces
537 newp
= newval
[++stridx
];
542 tmp
= simple_strtoul(cp
, &newp
, 0);
543 *(uint32_t *)data
= __cpu_to_be32(tmp
);
547 /* If the ptr didn't advance, something went wrong */
548 if ((newp
- cp
) <= 0) {
549 printf("Sorry, I could not convert \"%s\"\n",
559 printf("Unexpected character '%c'\n", *newp
);
562 } else if (*newp
== '[') {
564 * Byte stream. Convert the values.
567 while ((stridx
< count
) && (*newp
!= ']')) {
571 newp
= newval
[++stridx
];
574 if (!isxdigit(*newp
))
576 tmp
= simple_strtoul(newp
, &newp
, 16);
577 *data
++ = tmp
& 0xFF;
581 printf("Unexpected character '%c'\n", *newp
);
586 * Assume it is one or more strings. Copy it into our
587 * data area for convenience (including the
588 * terminating '\0's).
590 while (stridx
< count
) {
591 size_t length
= strlen(newp
) + 1;
595 newp
= newval
[++stridx
];
601 /****************************************************************************/
604 * Heuristic to guess if this is a string or concatenated strings.
607 static int is_printable_string(const void *data
, int len
)
609 const char *s
= data
;
611 /* zero length is not */
615 /* must terminate with zero */
616 if (s
[len
- 1] != '\0')
619 /* printable or a null byte (concatenated strings) */
620 while (((*s
== '\0') || isprint(*s
)) && (len
> 0)) {
622 * If we see a null, there are three possibilities:
623 * 1) If len == 1, it is the end of the string, printable
624 * 2) Next character also a null, not printable.
625 * 3) Next character not a null, continue to check.
637 /* Not the null termination, or not done yet: not printable */
638 if (*s
!= '\0' || (len
!= 0))
646 * Print the property in the best format, a heuristic guess. Print as
647 * a string, concatenated strings, a byte, word, double word, or (if all
648 * else fails) it is printed as a stream of bytes.
650 static void print_data(const void *data
, int len
)
654 /* no data, don't print */
659 * It is a string, but it may have multiple strings (embedded '\0's).
661 if (is_printable_string(data
, len
)) {
668 j
+= strlen(data
) + 1;
669 data
+= strlen(data
) + 1;
679 for (j
= 0, p
= data
; j
< len
/4; j
++)
680 printf("0x%x%s", p
[j
], j
< (len
/4 - 1) ? " " : "");
682 } else { /* anything else... hexdump */
686 for (j
= 0, s
= data
; j
< len
; j
++)
687 printf("%02x%s", s
[j
], j
< len
- 1 ? " " : "");
692 /****************************************************************************/
695 * Recursively print (a portion of) the working_fdt. The depth parameter
696 * determines how deeply nested the fdt is printed.
698 static int fdt_print(const char *pathp
, char *prop
, int depth
)
700 static char tabs
[MAX_LEVEL
+1] =
701 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
702 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
703 const void *nodep
; /* property node pointer */
704 int nodeoffset
; /* node offset from libfdt */
705 int nextoffset
; /* next node offset from libfdt */
706 uint32_t tag
; /* tag */
707 int len
; /* length of the property */
708 int level
= 0; /* keep track of nesting level */
709 const struct fdt_property
*fdt_prop
;
711 nodeoffset
= fdt_path_offset (working_fdt
, pathp
);
712 if (nodeoffset
< 0) {
714 * Not found or something else bad happened.
716 printf ("libfdt fdt_path_offset() returned %s\n",
717 fdt_strerror(nodeoffset
));
721 * The user passed in a property as well as node path.
722 * Print only the given property and then return.
725 nodep
= fdt_getprop (working_fdt
, nodeoffset
, prop
, &len
);
727 /* no property value */
728 printf("%s %s\n", pathp
, prop
);
730 } else if (len
> 0) {
731 printf("%s = ", prop
);
732 print_data (nodep
, len
);
736 printf ("libfdt fdt_getprop(): %s\n",
743 * The user passed in a node path and no property,
744 * print the node and all subnodes.
747 tag
= fdt_next_tag(working_fdt
, nodeoffset
, &nextoffset
);
750 pathp
= fdt_get_name(working_fdt
, nodeoffset
, NULL
);
751 if (level
<= depth
) {
753 pathp
= "/* NULL pointer error */";
755 pathp
= "/"; /* root is nameless */
757 &tabs
[MAX_LEVEL
- level
], pathp
);
760 if (level
>= MAX_LEVEL
) {
761 printf("Nested too deep, aborting.\n");
768 printf("%s};\n", &tabs
[MAX_LEVEL
- level
]);
770 level
= -1; /* exit the loop */
774 fdt_prop
= fdt_offset_ptr(working_fdt
, nodeoffset
,
776 pathp
= fdt_string(working_fdt
,
777 fdt32_to_cpu(fdt_prop
->nameoff
));
778 len
= fdt32_to_cpu(fdt_prop
->len
);
779 nodep
= fdt_prop
->data
;
781 printf ("libfdt fdt_getprop(): %s\n",
784 } else if (len
== 0) {
785 /* the property has no value */
788 &tabs
[MAX_LEVEL
- level
],
791 if (level
<= depth
) {
793 &tabs
[MAX_LEVEL
- level
],
795 print_data (nodep
, len
);
801 printf("%s/* NOP */\n", &tabs
[MAX_LEVEL
- level
]);
807 printf("Unknown tag 0x%08X\n", tag
);
810 nodeoffset
= nextoffset
;
815 /********************************************************************/
819 "flattened device tree utility commands",
820 "addr <addr> [<length>] - Set the fdt location to <addr>\n"
821 #ifdef CONFIG_OF_BOARD_SETUP
822 "fdt boardsetup - Do board-specific set up\n"
824 "fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
825 "fdt resize - Resize fdt to size + padding to 4k addr\n"
826 "fdt print <path> [<prop>] - Recursive print starting at <path>\n"
827 "fdt list <path> [<prop>] - Print one level starting at <path>\n"
828 "fdt set <path> <prop> [<val>] - Set <property> [to <val>]\n"
829 "fdt mknode <path> <node> - Create a new node after <path>\n"
830 "fdt rm <path> [<prop>] - Delete the node or <property>\n"
831 "fdt header - Display header info\n"
832 "fdt bootcpu <id> - Set boot cpuid\n"
833 "fdt memory <addr> <size> - Add/Update memory node\n"
834 "fdt rsvmem print - Show current mem reserves\n"
835 "fdt rsvmem add <addr> <size> - Add a mem reserve\n"
836 "fdt rsvmem delete <index> - Delete a mem reserves\n"
837 "fdt chosen [<start> <end>] - Add/update the /chosen branch in the tree\n"
838 " <start>/<end> - initrd start/end addr\n"
839 "NOTE: Dereference aliases by omiting the leading '/', "
840 "e.g. fdt print ethernet0."