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 * Flattened Device Tree command, see the help for parameter definitions.
51 int do_fdt (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
54 printf ("Usage:\n%s\n", cmdtp->usage);
58 /********************************************************************
59 * Set the address of the fdt
60 ********************************************************************/
61 if (argv[1][0] == 'a') {
63 * Set the address [and length] of the fdt.
65 fdt = (struct fdt_header *)simple_strtoul(argv[2], NULL, 16);
77 len = simple_strtoul(argv[3], NULL, 16);
78 if (len < fdt_totalsize(fdt)) {
79 printf ("New length %d < existing length %d, "
81 len, fdt_totalsize(fdt));
84 * Open in place with a new length.
86 err = fdt_open_into(fdt, fdt, len);
88 printf ("libfdt fdt_open_into(): %s\n",
94 /********************************************************************
96 ********************************************************************/
97 } else if (strncmp(argv[1], "mo", 2) == 0) {
98 struct fdt_header *newaddr;
103 printf ("Usage:\n%s\n", cmdtp->usage);
108 * Set the address and length of the fdt.
110 fdt = (struct fdt_header *)simple_strtoul(argv[2], NULL, 16);
115 newaddr = (struct fdt_header *)simple_strtoul(argv[3],NULL,16);
118 * If the user specifies a length, use that. Otherwise use the
122 len = fdt_totalsize(fdt);
124 len = simple_strtoul(argv[4], NULL, 16);
125 if (len < fdt_totalsize(fdt)) {
126 printf ("New length 0x%X < existing length "
128 len, fdt_totalsize(fdt));
134 * Copy to the new location.
136 err = fdt_open_into(fdt, newaddr, len);
138 printf ("libfdt fdt_open_into(): %s\n",
144 /********************************************************************
146 ********************************************************************/
147 } else if (strncmp(argv[1], "mk", 2) == 0) {
148 char *pathp; /* path */
149 char *nodep; /* new node to add */
150 int nodeoffset; /* node offset from libfdt */
154 * Parameters: Node path, new node to be appended to the path.
157 printf ("Usage:\n%s\n", cmdtp->usage);
164 nodeoffset = fdt_path_offset (fdt, pathp);
165 if (nodeoffset < 0) {
167 * Not found or something else bad happened.
169 printf ("libfdt fdt_path_offset() returned %s\n",
170 fdt_strerror(nodeoffset));
173 err = fdt_add_subnode(fdt, nodeoffset, nodep);
175 printf ("libfdt fdt_add_subnode(): %s\n",
180 /********************************************************************
181 * Set the value of a property in the fdt.
182 ********************************************************************/
183 } else if (argv[1][0] == 's') {
184 char *pathp; /* path */
185 char *prop; /* property */
186 int nodeoffset; /* node offset from libfdt */
187 static char data[SCRATCHPAD]; /* storage for the property */
188 int len; /* new length of the property */
189 int ret; /* return value */
192 * Parameters: Node path, property, optional value.
195 printf ("Usage:\n%s\n", cmdtp->usage);
204 ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
209 nodeoffset = fdt_path_offset (fdt, pathp);
210 if (nodeoffset < 0) {
212 * Not found or something else bad happened.
214 printf ("libfdt fdt_path_offset() returned %s\n",
215 fdt_strerror(nodeoffset));
219 ret = fdt_setprop(fdt, nodeoffset, prop, data, len);
221 printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
225 /********************************************************************
226 * Print (recursive) / List (single level)
227 ********************************************************************/
228 } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
229 int depth = MAX_LEVEL; /* how deep to print */
230 char *pathp; /* path */
231 char *prop; /* property */
232 int ret; /* return value */
233 static char root[2] = "/";
236 * list is an alias for print, but limited to 1 level
238 if (argv[1][0] == 'l') {
243 * Get the starting path. The root node is an oddball,
244 * the offset is zero and has no name.
255 ret = fdt_print(pathp, prop, depth);
259 /********************************************************************
260 * Remove a property/node
261 ********************************************************************/
262 } else if (strncmp(argv[1], "rm", 2) == 0) {
263 int nodeoffset; /* node offset from libfdt */
267 * Get the path. The root node is an oddball, the offset
268 * is zero and has no name.
270 nodeoffset = fdt_path_offset (fdt, argv[2]);
271 if (nodeoffset < 0) {
273 * Not found or something else bad happened.
275 printf ("libfdt fdt_path_offset() returned %s\n",
276 fdt_strerror(nodeoffset));
280 * Do the delete. A fourth parameter means delete a property,
281 * otherwise delete the node.
284 err = fdt_delprop(fdt, nodeoffset, argv[3]);
286 printf("libfdt fdt_delprop(): %s\n",
291 err = fdt_del_node(fdt, nodeoffset);
293 printf("libfdt fdt_del_node(): %s\n",
299 /********************************************************************
300 * Display header info
301 ********************************************************************/
302 } else if (argv[1][0] == 'h') {
303 u32 version = fdt_version(fdt);
304 printf("magic:\t\t\t0x%x\n", fdt_magic(fdt));
305 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(fdt), fdt_totalsize(fdt));
306 printf("off_dt_struct:\t\t0x%x\n", fdt_off_dt_struct(fdt));
307 printf("off_dt_strings:\t\t0x%x\n", fdt_off_dt_strings(fdt));
308 printf("off_mem_rsvmap:\t\t0x%x\n", fdt_off_mem_rsvmap(fdt));
309 printf("version:\t\t%d\n", version);
310 printf("last_comp_version:\t%d\n", fdt_last_comp_version(fdt));
312 printf("boot_cpuid_phys:\t0x%x\n",
313 fdt_boot_cpuid_phys(fdt));
315 printf("size_dt_strings:\t0x%x\n",
316 fdt_size_dt_strings(fdt));
318 printf("size_dt_struct:\t\t0x%x\n",
319 fdt_size_dt_struct(fdt));
320 printf("number mem_rsv:\t\t0x%x\n", fdt_num_mem_rsv(fdt));
323 /********************************************************************
325 ********************************************************************/
326 } else if (strncmp(argv[1], "boo", 3) == 0) {
327 unsigned long tmp = simple_strtoul(argv[2], NULL, 16);
328 fdt_set_boot_cpuid_phys(fdt, tmp);
330 /********************************************************************
332 ********************************************************************/
333 } else if (strncmp(argv[1], "me", 2) == 0) {
336 #ifdef CFG_64BIT_STRTOUL
337 addr = simple_strtoull(argv[2], NULL, 16);
338 size = simple_strtoull(argv[3], NULL, 16);
340 addr = simple_strtoul(argv[2], NULL, 16);
341 size = simple_strtoul(argv[3], NULL, 16);
343 err = fdt_fixup_memory(fdt, addr, size);
347 /********************************************************************
348 * mem reserve commands
349 ********************************************************************/
350 } else if (strncmp(argv[1], "rs", 2) == 0) {
351 if (argv[2][0] == 'p') {
353 int total = fdt_num_mem_rsv(fdt);
355 printf("index\t\t start\t\t size\n");
356 printf("-------------------------------"
357 "-----------------\n");
358 for (j = 0; j < total; j++) {
359 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
361 printf("libfdt fdt_get_mem_rsv(): %s\n",
365 printf(" %x\t%08x%08x\t%08x%08x\n", j,
367 (u32)(addr & 0xffffffff),
369 (u32)(size & 0xffffffff));
371 } else if (argv[2][0] == 'a') {
374 #ifdef CFG_64BIT_STRTOUL
375 addr = simple_strtoull(argv[3], NULL, 16);
376 size = simple_strtoull(argv[4], NULL, 16);
378 addr = simple_strtoul(argv[3], NULL, 16);
379 size = simple_strtoul(argv[4], NULL, 16);
381 err = fdt_add_mem_rsv(fdt, addr, size);
384 printf("libfdt fdt_add_mem_rsv(): %s\n",
388 } else if (argv[2][0] == 'd') {
389 unsigned long idx = simple_strtoul(argv[3], NULL, 16);
390 int err = fdt_del_mem_rsv(fdt, idx);
393 printf("libfdt fdt_del_mem_rsv(): %s\n",
398 /* Unrecognized command */
399 printf ("Usage:\n%s\n", cmdtp->usage);
403 #ifdef CONFIG_OF_BOARD_SETUP
404 /* Call the board-specific fixup routine */
405 else if (strncmp(argv[1], "boa", 3) == 0)
406 ft_board_setup(fdt, gd->bd);
408 /* Create a chosen node */
409 else if (argv[1][0] == 'c')
410 fdt_chosen(fdt, 0, 0, 1);
412 /* Unrecognized command */
413 printf ("Usage:\n%s\n", cmdtp->usage);
420 /****************************************************************************/
422 static int fdt_valid(void)
427 printf ("The address of the fdt is invalid (NULL).\n");
431 err = fdt_check_header(fdt);
433 return 1; /* valid */
436 printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
438 * Be more informative on bad version.
440 if (err == -FDT_ERR_BADVERSION) {
441 if (fdt_version(fdt) < FDT_FIRST_SUPPORTED_VERSION) {
442 printf (" - too old, fdt $d < %d",
444 FDT_FIRST_SUPPORTED_VERSION);
447 if (fdt_last_comp_version(fdt) > FDT_LAST_SUPPORTED_VERSION) {
448 printf (" - too new, fdt $d > %d",
450 FDT_LAST_SUPPORTED_VERSION);
461 /****************************************************************************/
464 * Parse the user's input, partially heuristic. Valid formats:
465 * <0x00112233 4 05> - an array of cells. Numbers follow standard
467 * [00 11 22 .. nn] - byte stream
468 * "string" - If the the value doesn't start with "<" or "[", it is
469 * treated as a string. Note that the quotes are
470 * stripped by the parser before we get the string.
471 * newval: An array of strings containing the new property as specified
472 * on the command line
473 * count: The number of strings in the array
474 * data: A bytestream to be placed in the property
475 * len: The length of the resulting bytestream
477 static int fdt_parse_prop(char **newval, int count, char *data, int *len)
479 char *cp; /* temporary char pointer */
480 char *newp; /* temporary newval char pointer */
481 unsigned long tmp; /* holds converted values */
487 /* An array of cells */
490 while ((*newp != '>') && (stridx < count)) {
492 * Keep searching until we find that last ">"
493 * That way users don't have to escape the spaces
496 newp = newval[++stridx];
501 tmp = simple_strtoul(cp, &newp, 0);
502 *(uint32_t *)data = __cpu_to_be32(tmp);
506 /* If the ptr didn't advance, something went wrong */
507 if ((newp - cp) <= 0) {
508 printf("Sorry, I could not convert \"%s\"\n",
518 printf("Unexpected character '%c'\n", *newp);
521 } else if (*newp == '[') {
523 * Byte stream. Convert the values.
526 while ((*newp != ']') && (stridx < count)) {
527 tmp = simple_strtoul(newp, &newp, 16);
528 *data++ = tmp & 0xFF;
533 newp = newval[++stridx];
536 printf("Unexpected character '%c'\n", *newval);
541 * Assume it is a string. Copy it into our data area for
542 * convenience (including the terminating '\0').
544 while (stridx < count) {
545 *len = strlen(newp) + 1;
547 newp = newval[++stridx];
553 /****************************************************************************/
556 * Heuristic to guess if this is a string or concatenated strings.
559 static int is_printable_string(const void *data, int len)
561 const char *s = data;
563 /* zero length is not */
567 /* must terminate with zero */
568 if (s[len - 1] != '\0')
571 /* printable or a null byte (concatenated strings) */
572 while (((*s == '\0') || isprint(*s)) && (len > 0)) {
574 * If we see a null, there are three possibilities:
575 * 1) If len == 1, it is the end of the string, printable
576 * 2) Next character also a null, not printable.
577 * 3) Next character not a null, continue to check.
589 /* Not the null termination, or not done yet: not printable */
590 if (*s != '\0' || (len != 0))
598 * Print the property in the best format, a heuristic guess. Print as
599 * a string, concatenated strings, a byte, word, double word, or (if all
600 * else fails) it is printed as a stream of bytes.
602 static void print_data(const void *data, int len)
606 /* no data, don't print */
611 * It is a string, but it may have multiple strings (embedded '\0's).
613 if (is_printable_string(data, len)) {
620 j += strlen(data) + 1;
621 data += strlen(data) + 1;
631 for (j = 0, p = data; j < len/4; j ++)
632 printf("0x%x%s", p[j], j < (len/4 - 1) ? " " : "");
634 } else { /* anything else... hexdump */
638 for (j = 0, s = data; j < len; j++)
639 printf("%02x%s", s[j], j < len - 1 ? " " : "");
644 /****************************************************************************/
647 * Recursively print (a portion of) the fdt. The depth parameter
648 * determines how deeply nested the fdt is printed.
650 static int fdt_print(const char *pathp, char *prop, int depth)
652 static char tabs[MAX_LEVEL+1] =
653 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
654 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
655 const void *nodep; /* property node pointer */
656 int nodeoffset; /* node offset from libfdt */
657 int nextoffset; /* next node offset from libfdt */
658 uint32_t tag; /* tag */
659 int len; /* length of the property */
660 int level = 0; /* keep track of nesting level */
661 const struct fdt_property *fdt_prop;
663 nodeoffset = fdt_path_offset (fdt, pathp);
664 if (nodeoffset < 0) {
666 * Not found or something else bad happened.
668 printf ("libfdt fdt_path_offset() returned %s\n",
669 fdt_strerror(nodeoffset));
673 * The user passed in a property as well as node path.
674 * Print only the given property and then return.
677 nodep = fdt_getprop (fdt, nodeoffset, prop, &len);
679 /* no property value */
680 printf("%s %s\n", pathp, prop);
682 } else if (len > 0) {
683 printf("%s = ", prop);
684 print_data (nodep, len);
688 printf ("libfdt fdt_getprop(): %s\n",
695 * The user passed in a node path and no property,
696 * print the node and all subnodes.
699 tag = fdt_next_tag(fdt, nodeoffset, &nextoffset);
702 pathp = fdt_get_name(fdt, nodeoffset, NULL);
703 if (level <= depth) {
705 pathp = "/* NULL pointer error */";
707 pathp = "/"; /* root is nameless */
709 &tabs[MAX_LEVEL - level], pathp);
712 if (level >= MAX_LEVEL) {
713 printf("Nested too deep, aborting.\n");
720 printf("%s};\n", &tabs[MAX_LEVEL - level]);
722 level = -1; /* exit the loop */
726 fdt_prop = fdt_offset_ptr(fdt, nodeoffset,
728 pathp = fdt_string(fdt,
729 fdt32_to_cpu(fdt_prop->nameoff));
730 len = fdt32_to_cpu(fdt_prop->len);
731 nodep = fdt_prop->data;
733 printf ("libfdt fdt_getprop(): %s\n",
736 } else if (len == 0) {
737 /* the property has no value */
740 &tabs[MAX_LEVEL - level],
743 if (level <= depth) {
745 &tabs[MAX_LEVEL - level],
747 print_data (nodep, len);
753 printf("/* NOP */\n", &tabs[MAX_LEVEL - level]);
759 printf("Unknown tag 0x%08X\n", tag);
762 nodeoffset = nextoffset;
767 /********************************************************************/
771 "fdt - flattened device tree utility commands\n",
772 "addr <addr> [<length>] - Set the fdt location to <addr>\n"
773 #ifdef CONFIG_OF_BOARD_SETUP
774 "fdt boardsetup - Do board-specific set up\n"
776 "fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
777 "fdt print <path> [<prop>] - Recursive print starting at <path>\n"
778 "fdt list <path> [<prop>] - Print one level starting at <path>\n"
779 "fdt set <path> <prop> [<val>] - Set <property> [to <val>]\n"
780 "fdt mknode <path> <node> - Create a new node after <path>\n"
781 "fdt rm <path> [<prop>] - Delete the node or <property>\n"
782 "fdt header - Display header info\n"
783 "fdt bootcpu <id> - Set boot cpuid\n"
784 "fdt memory <addr> <size> - Add/Update memory node\n"
785 "fdt rsvmem print - Show current mem reserves\n"
786 "fdt rsvmem add <addr> <size> - Add a mem reserve\n"
787 "fdt rsvmem delete <index> - Delete a mem reserves\n"
788 "fdt chosen - Add/update the /chosen branch in the tree\n"
789 "NOTE: If the path or property you are setting/printing has a '#' character\n"
790 " or spaces, you MUST escape it with a \\ character or quote it with \".\n"