1 /*-
2 * Copyright (c) 2009-2010 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Semihalf under sponsorship from
6 * the FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32
33 #include <stand.h>
34 #include <fdt.h>
35 #include <libfdt.h>
36 #include <sys/param.h>
37 #include <sys/linker.h>
38 #include <machine/elf.h>
39
40 #include "bootstrap.h"
41 #include "fdt_platform.h"
42
43 #ifdef DEBUG
44 #define debugf(fmt, args...) do { printf("%s(): ", __func__); \
45 printf(fmt,##args); } while (0)
46 #else
47 #define debugf(fmt, args...)
48 #endif
49
50 #define FDT_CWD_LEN 256
51 #define FDT_MAX_DEPTH 6
52
53 #define FDT_PROP_SEP " = "
54
55 #define COPYOUT(s,d,l) archsw.arch_copyout(s, d, l)
56 #define COPYIN(s,d,l) archsw.arch_copyin(s, d, l)
57
58 #define FDT_STATIC_DTB_SYMBOL "fdt_static_dtb"
59
60 #define CMD_REQUIRES_BLOB 0x01
61
62 /* Location of FDT yet to be loaded. */
63 /* This may be in read-only memory, so can't be manipulated directly. */
64 static struct fdt_header *fdt_to_load = NULL;
65 /* Location of FDT on heap. */
66 /* This is the copy we actually manipulate. */
67 static struct fdt_header *fdtp = NULL;
68 /* Size of FDT blob */
69 static size_t fdtp_size = 0;
70 /* Location of FDT in kernel or module. */
71 /* This won't be set if FDT is loaded from disk or memory. */
72 /* If it is set, we'll update it when fdt_copy() gets called. */
73 static vm_offset_t fdtp_va = 0;
74
75 static int fdt_load_dtb(vm_offset_t va);
76
77 static int fdt_cmd_nyi(int argc, char *argv[]);
78
79 static int fdt_cmd_addr(int argc, char *argv[]);
80 static int fdt_cmd_mkprop(int argc, char *argv[]);
81 static int fdt_cmd_cd(int argc, char *argv[]);
82 static int fdt_cmd_hdr(int argc, char *argv[]);
83 static int fdt_cmd_ls(int argc, char *argv[]);
84 static int fdt_cmd_prop(int argc, char *argv[]);
85 static int fdt_cmd_pwd(int argc, char *argv[]);
86 static int fdt_cmd_rm(int argc, char *argv[]);
87 static int fdt_cmd_mknode(int argc, char *argv[]);
88 static int fdt_cmd_mres(int argc, char *argv[]);
89
90 typedef int cmdf_t(int, char *[]);
91
92 struct cmdtab {
93 const char *name;
94 cmdf_t *handler;
95 int flags;
96 };
97
98 static const struct cmdtab commands[] = {
99 { "addr", &fdt_cmd_addr, 0 },
100 { "alias", &fdt_cmd_nyi, 0 },
101 { "cd", &fdt_cmd_cd, CMD_REQUIRES_BLOB },
102 { "header", &fdt_cmd_hdr, CMD_REQUIRES_BLOB },
103 { "ls", &fdt_cmd_ls, CMD_REQUIRES_BLOB },
104 { "mknode", &fdt_cmd_mknode, CMD_REQUIRES_BLOB },
105 { "mkprop", &fdt_cmd_mkprop, CMD_REQUIRES_BLOB },
106 { "mres", &fdt_cmd_mres, CMD_REQUIRES_BLOB },
107 { "prop", &fdt_cmd_prop, CMD_REQUIRES_BLOB },
108 { "pwd", &fdt_cmd_pwd, CMD_REQUIRES_BLOB },
109 { "rm", &fdt_cmd_rm, CMD_REQUIRES_BLOB },
110 { NULL, NULL }
111 };
112
113 static char cwd[FDT_CWD_LEN] = "/";
114
115 static vm_offset_t
fdt_find_static_dtb()116 fdt_find_static_dtb()
117 {
118 Elf_Ehdr *ehdr;
119 Elf_Shdr *shdr;
120 Elf_Sym sym;
121 vm_offset_t strtab, symtab, fdt_start;
122 uint64_t offs;
123 struct preloaded_file *kfp;
124 struct file_metadata *md;
125 char *strp;
126 int i, sym_count;
127
128 debugf("fdt_find_static_dtb()\n");
129
130 sym_count = symtab = strtab = 0;
131 strp = NULL;
132
133 offs = __elfN(relocation_offset);
134
135 kfp = file_findfile(NULL, NULL);
136 if (kfp == NULL)
137 return (0);
138
139 /* Locate the dynamic symbols and strtab. */
140 md = file_findmetadata(kfp, MODINFOMD_ELFHDR);
141 if (md == NULL)
142 return (0);
143 ehdr = (Elf_Ehdr *)md->md_data;
144
145 md = file_findmetadata(kfp, MODINFOMD_SHDR);
146 if (md == NULL)
147 return (0);
148 shdr = (Elf_Shdr *)md->md_data;
149
150 for (i = 0; i < ehdr->e_shnum; ++i) {
151 if (shdr[i].sh_type == SHT_DYNSYM && symtab == 0) {
152 symtab = shdr[i].sh_addr + offs;
153 sym_count = shdr[i].sh_size / sizeof(Elf_Sym);
154 } else if (shdr[i].sh_type == SHT_STRTAB && strtab == 0) {
155 strtab = shdr[i].sh_addr + offs;
156 }
157 }
158
159 /*
160 * The most efficent way to find a symbol would be to calculate a
161 * hash, find proper bucket and chain, and thus find a symbol.
162 * However, that would involve code duplication (e.g. for hash
163 * function). So we're using simpler and a bit slower way: we're
164 * iterating through symbols, searching for the one which name is
165 * 'equal' to 'fdt_static_dtb'. To speed up the process a little bit,
166 * we are eliminating symbols type of which is not STT_NOTYPE, or(and)
167 * those which binding attribute is not STB_GLOBAL.
168 */
169 fdt_start = 0;
170 while (sym_count > 0 && fdt_start == 0) {
171 COPYOUT(symtab, &sym, sizeof(sym));
172 symtab += sizeof(sym);
173 --sym_count;
174 if (ELF_ST_BIND(sym.st_info) != STB_GLOBAL ||
175 ELF_ST_TYPE(sym.st_info) != STT_NOTYPE)
176 continue;
177 strp = strdupout(strtab + sym.st_name);
178 if (strcmp(strp, FDT_STATIC_DTB_SYMBOL) == 0)
179 fdt_start = (vm_offset_t)sym.st_value + offs;
180 free(strp);
181 }
182 return (fdt_start);
183 }
184
185 static int
fdt_load_dtb(vm_offset_t va)186 fdt_load_dtb(vm_offset_t va)
187 {
188 struct fdt_header header;
189 int err;
190
191 debugf("fdt_load_dtb(0x%08jx)\n", (uintmax_t)va);
192
193 COPYOUT(va, &header, sizeof(header));
194 err = fdt_check_header(&header);
195 if (err < 0) {
196 if (err == -FDT_ERR_BADVERSION)
197 sprintf(command_errbuf,
198 "incompatible blob version: %d, should be: %d",
199 fdt_version(fdtp), FDT_LAST_SUPPORTED_VERSION);
200
201 else
202 sprintf(command_errbuf, "error validating blob: %s",
203 fdt_strerror(err));
204 return (1);
205 }
206
207 /*
208 * Release previous blob
209 */
210 if (fdtp)
211 free(fdtp);
212
213 fdtp_size = fdt_totalsize(&header);
214 fdtp = malloc(fdtp_size);
215
216 if (fdtp == NULL) {
217 command_errmsg = "can't allocate memory for device tree copy";
218 return (1);
219 }
220
221 fdtp_va = va;
222 COPYOUT(va, fdtp, fdtp_size);
223 debugf("DTB blob found at 0x%jx, size: 0x%jx\n", (uintmax_t)va, (uintmax_t)fdtp_size);
224
225 return (0);
226 }
227
228 int
fdt_load_dtb_addr(struct fdt_header * header)229 fdt_load_dtb_addr(struct fdt_header *header)
230 {
231 int err;
232
233 debugf("fdt_load_dtb_addr(0x%p)\n", header);
234
235 fdtp_size = fdt_totalsize(header);
236 err = fdt_check_header(header);
237 if (err < 0) {
238 sprintf(command_errbuf, "error validating blob: %s",
239 fdt_strerror(err));
240 return (err);
241 }
242 free(fdtp);
243 if ((fdtp = malloc(fdtp_size)) == NULL) {
244 command_errmsg = "can't allocate memory for device tree copy";
245 return (1);
246 }
247
248 fdtp_va = 0; // Don't write this back into module or kernel.
249 bcopy(header, fdtp, fdtp_size);
250 return (0);
251 }
252
253 int
fdt_load_dtb_file(const char * filename)254 fdt_load_dtb_file(const char * filename)
255 {
256 struct preloaded_file *bfp, *oldbfp;
257 int err;
258
259 debugf("fdt_load_dtb_file(%s)\n", filename);
260
261 oldbfp = file_findfile(NULL, "dtb");
262
263 /* Attempt to load and validate a new dtb from a file. */
264 if ((bfp = file_loadraw(filename, "dtb")) == NULL) {
265 sprintf(command_errbuf, "failed to load file '%s'", filename);
266 return (1);
267 }
268 if ((err = fdt_load_dtb(bfp->f_addr)) != 0) {
269 file_discard(bfp);
270 return (err);
271 }
272
273 /* A new dtb was validated, discard any previous file. */
274 if (oldbfp)
275 file_discard(oldbfp);
276 return (0);
277 }
278
279 int
fdt_setup_fdtp()280 fdt_setup_fdtp()
281 {
282 struct preloaded_file *bfp;
283 vm_offset_t va;
284
285 debugf("fdt_setup_fdtp()\n");
286
287 /* If we already loaded a file, use it. */
288 if ((bfp = file_findfile(NULL, "dtb")) != NULL) {
289 if (fdt_load_dtb(bfp->f_addr) == 0) {
290 printf("Using DTB from loaded file '%s'.\n",
291 bfp->f_name);
292 return (0);
293 }
294 }
295
296 /* If we were given the address of a valid blob in memory, use it. */
297 if (fdt_to_load != NULL) {
298 if (fdt_load_dtb_addr(fdt_to_load) == 0) {
299 printf("Using DTB from memory address 0x%08X.\n",
300 (unsigned int)fdt_to_load);
301 return (0);
302 }
303 }
304
305 if (fdt_platform_load_dtb() == 0)
306 return (0);
307
308 /* If there is a dtb compiled into the kernel, use it. */
309 if ((va = fdt_find_static_dtb()) != 0) {
310 if (fdt_load_dtb(va) == 0) {
311 printf("Using DTB compiled into kernel.\n");
312 return (0);
313 }
314 }
315
316 command_errmsg = "No device tree blob found!\n";
317 return (1);
318 }
319
320 #define fdt_strtovect(str, cellbuf, lim, cellsize) _fdt_strtovect((str), \
321 (cellbuf), (lim), (cellsize), 0);
322
323 /* Force using base 16 */
324 #define fdt_strtovectx(str, cellbuf, lim, cellsize) _fdt_strtovect((str), \
325 (cellbuf), (lim), (cellsize), 16);
326
327 static int
_fdt_strtovect(const char * str,void * cellbuf,int lim,unsigned char cellsize,uint8_t base)328 _fdt_strtovect(const char *str, void *cellbuf, int lim, unsigned char cellsize,
329 uint8_t base)
330 {
331 const char *buf = str;
332 const char *end = str + strlen(str) - 2;
333 uint32_t *u32buf = NULL;
334 uint8_t *u8buf = NULL;
335 int cnt = 0;
336
337 if (cellsize == sizeof(uint32_t))
338 u32buf = (uint32_t *)cellbuf;
339 else
340 u8buf = (uint8_t *)cellbuf;
341
342 if (lim == 0)
343 return (0);
344
345 while (buf < end) {
346
347 /* Skip white whitespace(s)/separators */
348 while (!isxdigit(*buf) && buf < end)
349 buf++;
350
351 if (u32buf != NULL)
352 u32buf[cnt] =
353 cpu_to_fdt32((uint32_t)strtol(buf, NULL, base));
354
355 else
356 u8buf[cnt] = (uint8_t)strtol(buf, NULL, base);
357
358 if (cnt + 1 <= lim - 1)
359 cnt++;
360 else
361 break;
362 buf++;
363 /* Find another number */
364 while ((isxdigit(*buf) || *buf == 'x') && buf < end)
365 buf++;
366 }
367 return (cnt);
368 }
369
370 void
fdt_fixup_ethernet(const char * str,char * ethstr,int len)371 fdt_fixup_ethernet(const char *str, char *ethstr, int len)
372 {
373 uint8_t tmp_addr[6];
374
375 /* Convert macaddr string into a vector of uints */
376 fdt_strtovectx(str, &tmp_addr, 6, sizeof(uint8_t));
377 /* Set actual property to a value from vect */
378 fdt_setprop(fdtp, fdt_path_offset(fdtp, ethstr),
379 "local-mac-address", &tmp_addr, 6 * sizeof(uint8_t));
380 }
381
382 void
fdt_fixup_cpubusfreqs(unsigned long cpufreq,unsigned long busfreq)383 fdt_fixup_cpubusfreqs(unsigned long cpufreq, unsigned long busfreq)
384 {
385 int lo, o = 0, o2, maxo = 0, depth;
386 const uint32_t zero = 0;
387
388 /* We want to modify every subnode of /cpus */
389 o = fdt_path_offset(fdtp, "/cpus");
390 if (o < 0)
391 return;
392
393 /* maxo should contain offset of node next to /cpus */
394 depth = 0;
395 maxo = o;
396 while (depth != -1)
397 maxo = fdt_next_node(fdtp, maxo, &depth);
398
399 /* Find CPU frequency properties */
400 o = fdt_node_offset_by_prop_value(fdtp, o, "clock-frequency",
401 &zero, sizeof(uint32_t));
402
403 o2 = fdt_node_offset_by_prop_value(fdtp, o, "bus-frequency", &zero,
404 sizeof(uint32_t));
405
406 lo = MIN(o, o2);
407
408 while (o != -FDT_ERR_NOTFOUND && o2 != -FDT_ERR_NOTFOUND) {
409
410 o = fdt_node_offset_by_prop_value(fdtp, lo,
411 "clock-frequency", &zero, sizeof(uint32_t));
412
413 o2 = fdt_node_offset_by_prop_value(fdtp, lo, "bus-frequency",
414 &zero, sizeof(uint32_t));
415
416 /* We're only interested in /cpus subnode(s) */
417 if (lo > maxo)
418 break;
419
420 fdt_setprop_inplace_cell(fdtp, lo, "clock-frequency",
421 (uint32_t)cpufreq);
422
423 fdt_setprop_inplace_cell(fdtp, lo, "bus-frequency",
424 (uint32_t)busfreq);
425
426 lo = MIN(o, o2);
427 }
428 }
429
430 static int
fdt_reg_valid(uint32_t * reg,int len,int addr_cells,int size_cells)431 fdt_reg_valid(uint32_t *reg, int len, int addr_cells, int size_cells)
432 {
433 int cells_in_tuple, i, tuples, tuple_size;
434 uint32_t cur_start, cur_size;
435
436 cells_in_tuple = (addr_cells + size_cells);
437 tuple_size = cells_in_tuple * sizeof(uint32_t);
438 tuples = len / tuple_size;
439 if (tuples == 0)
440 return (EINVAL);
441
442 for (i = 0; i < tuples; i++) {
443 if (addr_cells == 2)
444 cur_start = fdt64_to_cpu(reg[i * cells_in_tuple]);
445 else
446 cur_start = fdt32_to_cpu(reg[i * cells_in_tuple]);
447
448 if (size_cells == 2)
449 cur_size = fdt64_to_cpu(reg[i * cells_in_tuple + 2]);
450 else
451 cur_size = fdt32_to_cpu(reg[i * cells_in_tuple + 1]);
452
453 if (cur_size == 0)
454 return (EINVAL);
455
456 debugf(" reg#%d (start: 0x%0x size: 0x%0x) valid!\n",
457 i, cur_start, cur_size);
458 }
459 return (0);
460 }
461
462 void
fdt_fixup_memory(struct fdt_mem_region * region,size_t num)463 fdt_fixup_memory(struct fdt_mem_region *region, size_t num)
464 {
465 struct fdt_mem_region *curmr;
466 uint32_t addr_cells, size_cells;
467 uint32_t *addr_cellsp, *reg, *size_cellsp;
468 int err, i, len, memory, root;
469 size_t realmrno;
470 uint8_t *buf, *sb;
471 uint64_t rstart, rsize;
472 int reserved;
473
474 root = fdt_path_offset(fdtp, "/");
475 if (root < 0) {
476 sprintf(command_errbuf, "Could not find root node !");
477 return;
478 }
479
480 memory = fdt_path_offset(fdtp, "/memory");
481 if (memory <= 0) {
482 /* Create proper '/memory' node. */
483 memory = fdt_add_subnode(fdtp, root, "memory");
484 if (memory <= 0) {
485 sprintf(command_errbuf, "Could not fixup '/memory' "
486 "node, error code : %d!\n", memory);
487 return;
488 }
489
490 err = fdt_setprop(fdtp, memory, "device_type", "memory",
491 sizeof("memory"));
492
493 if (err < 0)
494 return;
495 }
496
497 addr_cellsp = (uint32_t *)fdt_getprop(fdtp, root, "#address-cells",
498 NULL);
499 size_cellsp = (uint32_t *)fdt_getprop(fdtp, root, "#size-cells", NULL);
500
501 if (addr_cellsp == NULL || size_cellsp == NULL) {
502 sprintf(command_errbuf, "Could not fixup '/memory' node : "
503 "%s %s property not found in root node!\n",
504 (!addr_cellsp) ? "#address-cells" : "",
505 (!size_cellsp) ? "#size-cells" : "");
506 return;
507 }
508
509 addr_cells = fdt32_to_cpu(*addr_cellsp);
510 size_cells = fdt32_to_cpu(*size_cellsp);
511
512 /*
513 * Convert memreserve data to memreserve property
514 * Check if property already exists
515 */
516 reserved = fdt_num_mem_rsv(fdtp);
517 if (reserved &&
518 (fdt_getprop(fdtp, root, "memreserve", NULL) == NULL)) {
519 len = (addr_cells + size_cells) * reserved * sizeof(uint32_t);
520 sb = buf = (uint8_t *)malloc(len);
521 if (!buf)
522 return;
523
524 bzero(buf, len);
525
526 for (i = 0; i < reserved; i++) {
527 if (fdt_get_mem_rsv(fdtp, i, &rstart, &rsize))
528 break;
529 if (rsize) {
530 /* Ensure endianess, and put cells into a buffer */
531 if (addr_cells == 2)
532 *(uint64_t *)buf =
533 cpu_to_fdt64(rstart);
534 else
535 *(uint32_t *)buf =
536 cpu_to_fdt32(rstart);
537
538 buf += sizeof(uint32_t) * addr_cells;
539 if (size_cells == 2)
540 *(uint64_t *)buf =
541 cpu_to_fdt64(rsize);
542 else
543 *(uint32_t *)buf =
544 cpu_to_fdt32(rsize);
545
546 buf += sizeof(uint32_t) * size_cells;
547 }
548 }
549
550 /* Set property */
551 if ((err = fdt_setprop(fdtp, root, "memreserve", sb, len)) < 0)
552 printf("Could not fixup 'memreserve' property.\n");
553
554 free(sb);
555 }
556
557 /* Count valid memory regions entries in sysinfo. */
558 realmrno = num;
559 for (i = 0; i < num; i++)
560 if (region[i].start == 0 && region[i].size == 0)
561 realmrno--;
562
563 if (realmrno == 0) {
564 sprintf(command_errbuf, "Could not fixup '/memory' node : "
565 "sysinfo doesn't contain valid memory regions info!\n");
566 return;
567 }
568
569 len = (addr_cells + size_cells) * realmrno * sizeof(uint32_t);
570 sb = buf = (uint8_t *)malloc(len);
571 if (!buf)
572 return;
573
574 bzero(buf, len);
575
576 for (i = 0; i < num; i++) {
577 curmr = ®ion[i];
578 if (curmr->size != 0) {
579 /* Ensure endianess, and put cells into a buffer */
580 if (addr_cells == 2)
581 *(uint64_t *)buf =
582 cpu_to_fdt64(curmr->start);
583 else
584 *(uint32_t *)buf =
585 cpu_to_fdt32(curmr->start);
586
587 buf += sizeof(uint32_t) * addr_cells;
588 if (size_cells == 2)
589 *(uint64_t *)buf =
590 cpu_to_fdt64(curmr->size);
591 else
592 *(uint32_t *)buf =
593 cpu_to_fdt32(curmr->size);
594
595 buf += sizeof(uint32_t) * size_cells;
596 }
597 }
598
599 /* Set property */
600 if ((err = fdt_setprop(fdtp, memory, "reg", sb, len)) < 0)
601 sprintf(command_errbuf, "Could not fixup '/memory' node.\n");
602
603 free(sb);
604 }
605
606 void
fdt_fixup_stdout(const char * str)607 fdt_fixup_stdout(const char *str)
608 {
609 char *ptr;
610 int serialno;
611 int len, no, sero;
612 const struct fdt_property *prop;
613 char *tmp[10];
614
615 ptr = (char *)str + strlen(str) - 1;
616 while (ptr > str && isdigit(*(str - 1)))
617 str--;
618
619 if (ptr == str)
620 return;
621
622 serialno = (int)strtol(ptr, NULL, 0);
623 no = fdt_path_offset(fdtp, "/chosen");
624 if (no < 0)
625 return;
626
627 prop = fdt_get_property(fdtp, no, "stdout", &len);
628
629 /* If /chosen/stdout does not extist, create it */
630 if (prop == NULL || (prop != NULL && len == 0)) {
631
632 bzero(tmp, 10 * sizeof(char));
633 strcpy((char *)&tmp, "serial");
634 if (strlen(ptr) > 3)
635 /* Serial number too long */
636 return;
637
638 strncpy((char *)tmp + 6, ptr, 3);
639 sero = fdt_path_offset(fdtp, (const char *)tmp);
640 if (sero < 0)
641 /*
642 * If serial device we're trying to assign
643 * stdout to doesn't exist in DT -- return.
644 */
645 return;
646
647 fdt_setprop(fdtp, no, "stdout", &tmp,
648 strlen((char *)&tmp) + 1);
649 fdt_setprop(fdtp, no, "stdin", &tmp,
650 strlen((char *)&tmp) + 1);
651 }
652 }
653
654 /*
655 * Locate the blob, fix it up and return its location.
656 */
657 static int
fdt_fixup(void)658 fdt_fixup(void)
659 {
660 int chosen, len;
661
662 len = 0;
663
664 debugf("fdt_fixup()\n");
665
666 if (fdtp == NULL && fdt_setup_fdtp() != 0)
667 return (0);
668
669 /* Create /chosen node (if not exists) */
670 if ((chosen = fdt_subnode_offset(fdtp, 0, "chosen")) ==
671 -FDT_ERR_NOTFOUND)
672 chosen = fdt_add_subnode(fdtp, 0, "chosen");
673
674 /* Value assigned to fixup-applied does not matter. */
675 if (fdt_getprop(fdtp, chosen, "fixup-applied", NULL))
676 return (1);
677
678 fdt_platform_fixups();
679
680 fdt_setprop(fdtp, chosen, "fixup-applied", NULL, 0);
681 return (1);
682 }
683
684 /*
685 * Copy DTB blob to specified location and return size
686 */
687 int
fdt_copy(vm_offset_t va)688 fdt_copy(vm_offset_t va)
689 {
690 int err;
691 debugf("fdt_copy va 0x%08x\n", va);
692 if (fdtp == NULL) {
693 err = fdt_setup_fdtp();
694 if (err) {
695 printf("No valid device tree blob found!\n");
696 return (0);
697 }
698 }
699
700 if (fdt_fixup() == 0)
701 return (0);
702
703 if (fdtp_va != 0) {
704 /* Overwrite the FDT with the fixed version. */
705 /* XXX Is this really appropriate? */
706 COPYIN(fdtp, fdtp_va, fdtp_size);
707 }
708 COPYIN(fdtp, va, fdtp_size);
709 return (fdtp_size);
710 }
711
712
713
714 int
command_fdt_internal(int argc,char * argv[])715 command_fdt_internal(int argc, char *argv[])
716 {
717 cmdf_t *cmdh;
718 int flags;
719 char *cmd;
720 int i, err;
721
722 if (argc < 2) {
723 command_errmsg = "usage is 'fdt <command> [<args>]";
724 return (CMD_ERROR);
725 }
726
727 /*
728 * Validate fdt <command>.
729 */
730 cmd = strdup(argv[1]);
731 i = 0;
732 cmdh = NULL;
733 while (!(commands[i].name == NULL)) {
734 if (strcmp(cmd, commands[i].name) == 0) {
735 /* found it */
736 cmdh = commands[i].handler;
737 flags = commands[i].flags;
738 break;
739 }
740 i++;
741 }
742 if (cmdh == NULL) {
743 command_errmsg = "unknown command";
744 return (CMD_ERROR);
745 }
746
747 if (flags & CMD_REQUIRES_BLOB) {
748 /*
749 * Check if uboot env vars were parsed already. If not, do it now.
750 */
751 if (fdt_fixup() == 0)
752 return (CMD_ERROR);
753 }
754
755 /*
756 * Call command handler.
757 */
758 err = (*cmdh)(argc, argv);
759
760 return (err);
761 }
762
763 static int
fdt_cmd_addr(int argc,char * argv[])764 fdt_cmd_addr(int argc, char *argv[])
765 {
766 struct preloaded_file *fp;
767 struct fdt_header *hdr;
768 const char *addr;
769 char *cp;
770
771 fdt_to_load = NULL;
772
773 if (argc > 2)
774 addr = argv[2];
775 else {
776 sprintf(command_errbuf, "no address specified");
777 return (CMD_ERROR);
778 }
779
780 hdr = (struct fdt_header *)strtoul(addr, &cp, 16);
781 if (cp == addr) {
782 sprintf(command_errbuf, "Invalid address: %s", addr);
783 return (CMD_ERROR);
784 }
785
786 while ((fp = file_findfile(NULL, "dtb")) != NULL) {
787 file_discard(fp);
788 }
789
790 fdt_to_load = hdr;
791 return (CMD_OK);
792 }
793
794 static int
fdt_cmd_cd(int argc,char * argv[])795 fdt_cmd_cd(int argc, char *argv[])
796 {
797 char *path;
798 char tmp[FDT_CWD_LEN];
799 int len, o;
800
801 path = (argc > 2) ? argv[2] : "/";
802
803 if (path[0] == '/') {
804 len = strlen(path);
805 if (len >= FDT_CWD_LEN)
806 goto fail;
807 } else {
808 /* Handle path specification relative to cwd */
809 len = strlen(cwd) + strlen(path) + 1;
810 if (len >= FDT_CWD_LEN)
811 goto fail;
812
813 strcpy(tmp, cwd);
814 strcat(tmp, "/");
815 strcat(tmp, path);
816 path = tmp;
817 }
818
819 o = fdt_path_offset(fdtp, path);
820 if (o < 0) {
821 sprintf(command_errbuf, "could not find node: '%s'", path);
822 return (CMD_ERROR);
823 }
824
825 strcpy(cwd, path);
826 return (CMD_OK);
827
828 fail:
829 sprintf(command_errbuf, "path too long: %d, max allowed: %d",
830 len, FDT_CWD_LEN - 1);
831 return (CMD_ERROR);
832 }
833
834 static int
fdt_cmd_hdr(int argc __unused,char * argv[]__unused)835 fdt_cmd_hdr(int argc __unused, char *argv[] __unused)
836 {
837 char line[80];
838 int ver;
839
840 if (fdtp == NULL) {
841 command_errmsg = "no device tree blob pointer?!";
842 return (CMD_ERROR);
843 }
844
845 ver = fdt_version(fdtp);
846 pager_open();
847 sprintf(line, "\nFlattened device tree header (%p):\n", fdtp);
848 pager_output(line);
849 sprintf(line, " magic = 0x%08x\n", fdt_magic(fdtp));
850 pager_output(line);
851 sprintf(line, " size = %d\n", fdt_totalsize(fdtp));
852 pager_output(line);
853 sprintf(line, " off_dt_struct = 0x%08x\n",
854 fdt_off_dt_struct(fdtp));
855 pager_output(line);
856 sprintf(line, " off_dt_strings = 0x%08x\n",
857 fdt_off_dt_strings(fdtp));
858 pager_output(line);
859 sprintf(line, " off_mem_rsvmap = 0x%08x\n",
860 fdt_off_mem_rsvmap(fdtp));
861 pager_output(line);
862 sprintf(line, " version = %d\n", ver);
863 pager_output(line);
864 sprintf(line, " last compatible version = %d\n",
865 fdt_last_comp_version(fdtp));
866 pager_output(line);
867 if (ver >= 2) {
868 sprintf(line, " boot_cpuid = %d\n",
869 fdt_boot_cpuid_phys(fdtp));
870 pager_output(line);
871 }
872 if (ver >= 3) {
873 sprintf(line, " size_dt_strings = %d\n",
874 fdt_size_dt_strings(fdtp));
875 pager_output(line);
876 }
877 if (ver >= 17) {
878 sprintf(line, " size_dt_struct = %d\n",
879 fdt_size_dt_struct(fdtp));
880 pager_output(line);
881 }
882 pager_close();
883
884 return (CMD_OK);
885 }
886
887 static int
fdt_cmd_ls(int argc,char * argv[])888 fdt_cmd_ls(int argc, char *argv[])
889 {
890 const char *prevname[FDT_MAX_DEPTH] = { NULL };
891 const char *name;
892 char *path;
893 int i, o, depth, len;
894
895 path = (argc > 2) ? argv[2] : NULL;
896 if (path == NULL)
897 path = cwd;
898
899 o = fdt_path_offset(fdtp, path);
900 if (o < 0) {
901 sprintf(command_errbuf, "could not find node: '%s'", path);
902 return (CMD_ERROR);
903 }
904
905 for (depth = 0;
906 (o >= 0) && (depth >= 0);
907 o = fdt_next_node(fdtp, o, &depth)) {
908
909 name = fdt_get_name(fdtp, o, &len);
910
911 if (depth > FDT_MAX_DEPTH) {
912 printf("max depth exceeded: %d\n", depth);
913 continue;
914 }
915
916 prevname[depth] = name;
917
918 /* Skip root (i = 1) when printing devices */
919 for (i = 1; i <= depth; i++) {
920 if (prevname[i] == NULL)
921 break;
922
923 if (strcmp(cwd, "/") == 0)
924 printf("/");
925 printf("%s", prevname[i]);
926 }
927 printf("\n");
928 }
929
930 return (CMD_OK);
931 }
932
933 static __inline int
isprint(int c)934 isprint(int c)
935 {
936
937 return (c >= ' ' && c <= 0x7e);
938 }
939
940 static int
fdt_isprint(const void * data,int len,int * count)941 fdt_isprint(const void *data, int len, int *count)
942 {
943 const char *d;
944 char ch;
945 int yesno, i;
946
947 if (len == 0)
948 return (0);
949
950 d = (const char *)data;
951 if (d[len - 1] != '\0')
952 return (0);
953
954 *count = 0;
955 yesno = 1;
956 for (i = 0; i < len; i++) {
957 ch = *(d + i);
958 if (isprint(ch) || (ch == '\0' && i > 0)) {
959 /* Count strings */
960 if (ch == '\0')
961 (*count)++;
962 continue;
963 }
964
965 yesno = 0;
966 break;
967 }
968
969 return (yesno);
970 }
971
972 static int
fdt_data_str(const void * data,int len,int count,char ** buf)973 fdt_data_str(const void *data, int len, int count, char **buf)
974 {
975 char *b, *tmp;
976 const char *d;
977 int buf_len, i, l;
978
979 /*
980 * Calculate the length for the string and allocate memory.
981 *
982 * Note that 'len' already includes at least one terminator.
983 */
984 buf_len = len;
985 if (count > 1) {
986 /*
987 * Each token had already a terminator buried in 'len', but we
988 * only need one eventually, don't count space for these.
989 */
990 buf_len -= count - 1;
991
992 /* Each consecutive token requires a ", " separator. */
993 buf_len += count * 2;
994 }
995
996 /* Add some space for surrounding double quotes. */
997 buf_len += count * 2;
998
999 /* Note that string being put in 'tmp' may be as big as 'buf_len'. */
1000 b = (char *)malloc(buf_len);
1001 tmp = (char *)malloc(buf_len);
1002 if (b == NULL)
1003 goto error;
1004
1005 if (tmp == NULL) {
1006 free(b);
1007 goto error;
1008 }
1009
1010 b[0] = '\0';
1011
1012 /*
1013 * Now that we have space, format the string.
1014 */
1015 i = 0;
1016 do {
1017 d = (const char *)data + i;
1018 l = strlen(d) + 1;
1019
1020 sprintf(tmp, "\"%s\"%s", d,
1021 (i + l) < len ? ", " : "");
1022 strcat(b, tmp);
1023
1024 i += l;
1025
1026 } while (i < len);
1027 *buf = b;
1028
1029 free(tmp);
1030
1031 return (0);
1032 error:
1033 return (1);
1034 }
1035
1036 static int
fdt_data_cell(const void * data,int len,char ** buf)1037 fdt_data_cell(const void *data, int len, char **buf)
1038 {
1039 char *b, *tmp;
1040 const uint32_t *c;
1041 int count, i, l;
1042
1043 /* Number of cells */
1044 count = len / 4;
1045
1046 /*
1047 * Calculate the length for the string and allocate memory.
1048 */
1049
1050 /* Each byte translates to 2 output characters */
1051 l = len * 2;
1052 if (count > 1) {
1053 /* Each consecutive cell requires a " " separator. */
1054 l += (count - 1) * 1;
1055 }
1056 /* Each cell will have a "0x" prefix */
1057 l += count * 2;
1058 /* Space for surrounding <> and terminator */
1059 l += 3;
1060
1061 b = (char *)malloc(l);
1062 tmp = (char *)malloc(l);
1063 if (b == NULL)
1064 goto error;
1065
1066 if (tmp == NULL) {
1067 free(b);
1068 goto error;
1069 }
1070
1071 b[0] = '\0';
1072 strcat(b, "<");
1073
1074 for (i = 0; i < len; i += 4) {
1075 c = (const uint32_t *)((const uint8_t *)data + i);
1076 sprintf(tmp, "0x%08x%s", fdt32_to_cpu(*c),
1077 i < (len - 4) ? " " : "");
1078 strcat(b, tmp);
1079 }
1080 strcat(b, ">");
1081 *buf = b;
1082
1083 free(tmp);
1084
1085 return (0);
1086 error:
1087 return (1);
1088 }
1089
1090 static int
fdt_data_bytes(const void * data,int len,char ** buf)1091 fdt_data_bytes(const void *data, int len, char **buf)
1092 {
1093 char *b, *tmp;
1094 const char *d;
1095 int i, l;
1096
1097 /*
1098 * Calculate the length for the string and allocate memory.
1099 */
1100
1101 /* Each byte translates to 2 output characters */
1102 l = len * 2;
1103 if (len > 1)
1104 /* Each consecutive byte requires a " " separator. */
1105 l += (len - 1) * 1;
1106 /* Each byte will have a "0x" prefix */
1107 l += len * 2;
1108 /* Space for surrounding [] and terminator. */
1109 l += 3;
1110
1111 b = (char *)malloc(l);
1112 tmp = (char *)malloc(l);
1113 if (b == NULL)
1114 goto error;
1115
1116 if (tmp == NULL) {
1117 free(b);
1118 goto error;
1119 }
1120
1121 b[0] = '\0';
1122 strcat(b, "[");
1123
1124 for (i = 0, d = data; i < len; i++) {
1125 sprintf(tmp, "0x%02x%s", d[i], i < len - 1 ? " " : "");
1126 strcat(b, tmp);
1127 }
1128 strcat(b, "]");
1129 *buf = b;
1130
1131 free(tmp);
1132
1133 return (0);
1134 error:
1135 return (1);
1136 }
1137
1138 static int
fdt_data_fmt(const void * data,int len,char ** buf)1139 fdt_data_fmt(const void *data, int len, char **buf)
1140 {
1141 int count;
1142
1143 if (len == 0) {
1144 *buf = NULL;
1145 return (1);
1146 }
1147
1148 if (fdt_isprint(data, len, &count))
1149 return (fdt_data_str(data, len, count, buf));
1150
1151 else if ((len % 4) == 0)
1152 return (fdt_data_cell(data, len, buf));
1153
1154 else
1155 return (fdt_data_bytes(data, len, buf));
1156 }
1157
1158 static int
fdt_prop(int offset)1159 fdt_prop(int offset)
1160 {
1161 char *line, *buf;
1162 const struct fdt_property *prop;
1163 const char *name;
1164 const void *data;
1165 int len, rv;
1166
1167 line = NULL;
1168 prop = fdt_offset_ptr(fdtp, offset, sizeof(*prop));
1169 if (prop == NULL)
1170 return (1);
1171
1172 name = fdt_string(fdtp, fdt32_to_cpu(prop->nameoff));
1173 len = fdt32_to_cpu(prop->len);
1174
1175 rv = 0;
1176 buf = NULL;
1177 if (len == 0) {
1178 /* Property without value */
1179 line = (char *)malloc(strlen(name) + 2);
1180 if (line == NULL) {
1181 rv = 2;
1182 goto out2;
1183 }
1184 sprintf(line, "%s\n", name);
1185 goto out1;
1186 }
1187
1188 /*
1189 * Process property with value
1190 */
1191 data = prop->data;
1192
1193 if (fdt_data_fmt(data, len, &buf) != 0) {
1194 rv = 3;
1195 goto out2;
1196 }
1197
1198 line = (char *)malloc(strlen(name) + strlen(FDT_PROP_SEP) +
1199 strlen(buf) + 2);
1200 if (line == NULL) {
1201 sprintf(command_errbuf, "could not allocate space for string");
1202 rv = 4;
1203 goto out2;
1204 }
1205
1206 sprintf(line, "%s" FDT_PROP_SEP "%s\n", name, buf);
1207
1208 out1:
1209 pager_open();
1210 pager_output(line);
1211 pager_close();
1212
1213 out2:
1214 if (buf)
1215 free(buf);
1216
1217 if (line)
1218 free(line);
1219
1220 return (rv);
1221 }
1222
1223 static int
fdt_modprop(int nodeoff,char * propname,void * value,char mode)1224 fdt_modprop(int nodeoff, char *propname, void *value, char mode)
1225 {
1226 uint32_t cells[100];
1227 const char *buf;
1228 int len, rv;
1229 const struct fdt_property *p;
1230
1231 p = fdt_get_property(fdtp, nodeoff, propname, NULL);
1232
1233 if (p != NULL) {
1234 if (mode == 1) {
1235 /* Adding inexistant value in mode 1 is forbidden */
1236 sprintf(command_errbuf, "property already exists!");
1237 return (CMD_ERROR);
1238 }
1239 } else if (mode == 0) {
1240 sprintf(command_errbuf, "property does not exist!");
1241 return (CMD_ERROR);
1242 }
1243 len = strlen(value);
1244 rv = 0;
1245 buf = value;
1246
1247 switch (*buf) {
1248 case '&':
1249 /* phandles */
1250 break;
1251 case '<':
1252 /* Data cells */
1253 len = fdt_strtovect(buf, (void *)&cells, 100,
1254 sizeof(uint32_t));
1255
1256 rv = fdt_setprop(fdtp, nodeoff, propname, &cells,
1257 len * sizeof(uint32_t));
1258 break;
1259 case '[':
1260 /* Data bytes */
1261 len = fdt_strtovect(buf, (void *)&cells, 100,
1262 sizeof(uint8_t));
1263
1264 rv = fdt_setprop(fdtp, nodeoff, propname, &cells,
1265 len * sizeof(uint8_t));
1266 break;
1267 case '"':
1268 default:
1269 /* Default -- string */
1270 rv = fdt_setprop_string(fdtp, nodeoff, propname, value);
1271 break;
1272 }
1273
1274 if (rv != 0) {
1275 if (rv == -FDT_ERR_NOSPACE)
1276 sprintf(command_errbuf,
1277 "Device tree blob is too small!\n");
1278 else
1279 sprintf(command_errbuf,
1280 "Could not add/modify property!\n");
1281 }
1282 return (rv);
1283 }
1284
1285 /* Merge strings from argv into a single string */
1286 static int
fdt_merge_strings(int argc,char * argv[],int start,char ** buffer)1287 fdt_merge_strings(int argc, char *argv[], int start, char **buffer)
1288 {
1289 char *buf;
1290 int i, idx, sz;
1291
1292 *buffer = NULL;
1293 sz = 0;
1294
1295 for (i = start; i < argc; i++)
1296 sz += strlen(argv[i]);
1297
1298 /* Additional bytes for whitespaces between args */
1299 sz += argc - start;
1300
1301 buf = (char *)malloc(sizeof(char) * sz);
1302 if (buf == NULL) {
1303 sprintf(command_errbuf, "could not allocate space "
1304 "for string");
1305 return (1);
1306 }
1307 bzero(buf, sizeof(char) * sz);
1308
1309 idx = 0;
1310 for (i = start, idx = 0; i < argc; i++) {
1311 strcpy(buf + idx, argv[i]);
1312 idx += strlen(argv[i]);
1313 buf[idx] = ' ';
1314 idx++;
1315 }
1316 buf[sz - 1] = '\0';
1317 *buffer = buf;
1318 return (0);
1319 }
1320
1321 /* Extract offset and name of node/property from a given path */
1322 static int
fdt_extract_nameloc(char ** pathp,char ** namep,int * nodeoff)1323 fdt_extract_nameloc(char **pathp, char **namep, int *nodeoff)
1324 {
1325 int o;
1326 char *path = *pathp, *name = NULL, *subpath = NULL;
1327
1328 subpath = strrchr(path, '/');
1329 if (subpath == NULL) {
1330 o = fdt_path_offset(fdtp, cwd);
1331 name = path;
1332 path = (char *)&cwd;
1333 } else {
1334 *subpath = '\0';
1335 if (strlen(path) == 0)
1336 path = cwd;
1337
1338 name = subpath + 1;
1339 o = fdt_path_offset(fdtp, path);
1340 }
1341
1342 if (strlen(name) == 0) {
1343 sprintf(command_errbuf, "name not specified");
1344 return (1);
1345 }
1346 if (o < 0) {
1347 sprintf(command_errbuf, "could not find node: '%s'", path);
1348 return (1);
1349 }
1350 *namep = name;
1351 *nodeoff = o;
1352 *pathp = path;
1353 return (0);
1354 }
1355
1356 static int
fdt_cmd_prop(int argc,char * argv[])1357 fdt_cmd_prop(int argc, char *argv[])
1358 {
1359 char *path, *propname, *value;
1360 int o, next, depth, rv;
1361 uint32_t tag;
1362
1363 path = (argc > 2) ? argv[2] : NULL;
1364
1365 value = NULL;
1366
1367 if (argc > 3) {
1368 /* Merge property value strings into one */
1369 if (fdt_merge_strings(argc, argv, 3, &value) != 0)
1370 return (CMD_ERROR);
1371 } else
1372 value = NULL;
1373
1374 if (path == NULL)
1375 path = cwd;
1376
1377 rv = CMD_OK;
1378
1379 if (value) {
1380 /* If value is specified -- try to modify prop. */
1381 if (fdt_extract_nameloc(&path, &propname, &o) != 0)
1382 return (CMD_ERROR);
1383
1384 rv = fdt_modprop(o, propname, value, 0);
1385 if (rv)
1386 return (CMD_ERROR);
1387 return (CMD_OK);
1388
1389 }
1390 /* User wants to display properties */
1391 o = fdt_path_offset(fdtp, path);
1392
1393 if (o < 0) {
1394 sprintf(command_errbuf, "could not find node: '%s'", path);
1395 rv = CMD_ERROR;
1396 goto out;
1397 }
1398
1399 depth = 0;
1400 while (depth >= 0) {
1401 tag = fdt_next_tag(fdtp, o, &next);
1402 switch (tag) {
1403 case FDT_NOP:
1404 break;
1405 case FDT_PROP:
1406 if (depth > 1)
1407 /* Don't process properties of nested nodes */
1408 break;
1409
1410 if (fdt_prop(o) != 0) {
1411 sprintf(command_errbuf, "could not process "
1412 "property");
1413 rv = CMD_ERROR;
1414 goto out;
1415 }
1416 break;
1417 case FDT_BEGIN_NODE:
1418 depth++;
1419 if (depth > FDT_MAX_DEPTH) {
1420 printf("warning: nesting too deep: %d\n",
1421 depth);
1422 goto out;
1423 }
1424 break;
1425 case FDT_END_NODE:
1426 depth--;
1427 if (depth == 0)
1428 /*
1429 * This is the end of our starting node, force
1430 * the loop finish.
1431 */
1432 depth--;
1433 break;
1434 }
1435 o = next;
1436 }
1437 out:
1438 return (rv);
1439 }
1440
1441 static int
fdt_cmd_mkprop(int argc,char * argv[])1442 fdt_cmd_mkprop(int argc, char *argv[])
1443 {
1444 int o;
1445 char *path, *propname, *value;
1446
1447 path = (argc > 2) ? argv[2] : NULL;
1448
1449 value = NULL;
1450
1451 if (argc > 3) {
1452 /* Merge property value strings into one */
1453 if (fdt_merge_strings(argc, argv, 3, &value) != 0)
1454 return (CMD_ERROR);
1455 } else
1456 value = NULL;
1457
1458 if (fdt_extract_nameloc(&path, &propname, &o) != 0)
1459 return (CMD_ERROR);
1460
1461 if (fdt_modprop(o, propname, value, 1))
1462 return (CMD_ERROR);
1463
1464 return (CMD_OK);
1465 }
1466
1467 static int
fdt_cmd_rm(int argc,char * argv[])1468 fdt_cmd_rm(int argc, char *argv[])
1469 {
1470 int o, rv;
1471 char *path = NULL, *propname;
1472
1473 if (argc > 2)
1474 path = argv[2];
1475 else {
1476 sprintf(command_errbuf, "no node/property name specified");
1477 return (CMD_ERROR);
1478 }
1479
1480 o = fdt_path_offset(fdtp, path);
1481 if (o < 0) {
1482 /* If node not found -- try to find & delete property */
1483 if (fdt_extract_nameloc(&path, &propname, &o) != 0)
1484 return (CMD_ERROR);
1485
1486 if ((rv = fdt_delprop(fdtp, o, propname)) != 0) {
1487 sprintf(command_errbuf, "could not delete"
1488 "%s\n", (rv == -FDT_ERR_NOTFOUND) ?
1489 "(property/node does not exist)" : "");
1490 return (CMD_ERROR);
1491
1492 } else
1493 return (CMD_OK);
1494 }
1495 /* If node exists -- remove node */
1496 rv = fdt_del_node(fdtp, o);
1497 if (rv) {
1498 sprintf(command_errbuf, "could not delete node");
1499 return (CMD_ERROR);
1500 }
1501 return (CMD_OK);
1502 }
1503
1504 static int
fdt_cmd_mknode(int argc,char * argv[])1505 fdt_cmd_mknode(int argc, char *argv[])
1506 {
1507 int o, rv;
1508 char *path = NULL, *nodename = NULL;
1509
1510 if (argc > 2)
1511 path = argv[2];
1512 else {
1513 sprintf(command_errbuf, "no node name specified");
1514 return (CMD_ERROR);
1515 }
1516
1517 if (fdt_extract_nameloc(&path, &nodename, &o) != 0)
1518 return (CMD_ERROR);
1519
1520 rv = fdt_add_subnode(fdtp, o, nodename);
1521
1522 if (rv < 0) {
1523 if (rv == -FDT_ERR_NOSPACE)
1524 sprintf(command_errbuf,
1525 "Device tree blob is too small!\n");
1526 else
1527 sprintf(command_errbuf,
1528 "Could not add node!\n");
1529 return (CMD_ERROR);
1530 }
1531 return (CMD_OK);
1532 }
1533
1534 static int
fdt_cmd_pwd(int argc,char * argv[])1535 fdt_cmd_pwd(int argc, char *argv[])
1536 {
1537 char line[FDT_CWD_LEN];
1538
1539 pager_open();
1540 sprintf(line, "%s\n", cwd);
1541 pager_output(line);
1542 pager_close();
1543 return (CMD_OK);
1544 }
1545
1546 static int
fdt_cmd_mres(int argc,char * argv[])1547 fdt_cmd_mres(int argc, char *argv[])
1548 {
1549 uint64_t start, size;
1550 int i, total;
1551 char line[80];
1552
1553 pager_open();
1554 total = fdt_num_mem_rsv(fdtp);
1555 if (total > 0) {
1556 pager_output("Reserved memory regions:\n");
1557 for (i = 0; i < total; i++) {
1558 fdt_get_mem_rsv(fdtp, i, &start, &size);
1559 sprintf(line, "reg#%d: (start: 0x%jx, size: 0x%jx)\n",
1560 i, start, size);
1561 pager_output(line);
1562 }
1563 } else
1564 pager_output("No reserved memory regions\n");
1565 pager_close();
1566
1567 return (CMD_OK);
1568 }
1569
1570 static int
fdt_cmd_nyi(int argc,char * argv[])1571 fdt_cmd_nyi(int argc, char *argv[])
1572 {
1573
1574 printf("command not yet implemented\n");
1575 return (CMD_ERROR);
1576 }
1577