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Merge branch 'master' of git://www.denx.de/git/u-boot-mips
[people/ms/u-boot.git] / lib_ppc / bootm.c
1 /*
2 * (C) Copyright 2008 Semihalf
3 *
4 * (C) Copyright 2000-2006
5 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6 *
7 * See file CREDITS for list of people who contributed to this
8 * project.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23 * MA 02111-1307 USA
24 */
25
26
27 #include <common.h>
28 #include <watchdog.h>
29 #include <command.h>
30 #include <image.h>
31 #include <malloc.h>
32 #include <zlib.h>
33 #include <bzlib.h>
34 #include <environment.h>
35 #include <asm/byteorder.h>
36
37 #if defined(CONFIG_OF_LIBFDT)
38 #include <fdt.h>
39 #include <libfdt.h>
40 #include <fdt_support.h>
41
42 static void fdt_error (const char *msg);
43 static int boot_get_fdt (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
44 bootm_headers_t *images, char **of_flat_tree, ulong *of_size);
45 static int boot_relocate_fdt (struct lmb *lmb, ulong bootmap_base,
46 cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
47 char **of_flat_tree, ulong *of_size);
48 #endif
49
50 #ifdef CFG_INIT_RAM_LOCK
51 #include <asm/cache.h>
52 #endif
53
54 DECLARE_GLOBAL_DATA_PTR;
55
56 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
57 extern ulong get_effective_memsize(void);
58 static ulong get_sp (void);
59 static void set_clocks_in_mhz (bd_t *kbd);
60
61 #ifndef CFG_LINUX_LOWMEM_MAX_SIZE
62 #define CFG_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
63 #endif
64
65 void __attribute__((noinline))
66 do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
67 bootm_headers_t *images)
68 {
69 ulong sp;
70
71 ulong initrd_start, initrd_end;
72 ulong rd_data_start, rd_data_end, rd_len;
73 ulong size;
74
75 ulong cmd_start, cmd_end, bootmap_base;
76 bd_t *kbd;
77 ulong ep = 0;
78 void (*kernel)(bd_t *, ulong, ulong, ulong, ulong);
79 int ret;
80 ulong of_size = 0;
81 struct lmb *lmb = images->lmb;
82
83 #if defined(CONFIG_OF_LIBFDT)
84 char *of_flat_tree = NULL;
85 #endif
86
87 bootmap_base = getenv_bootm_low();
88 size = getenv_bootm_size();
89
90 #ifdef DEBUG
91 if (((u64)bootmap_base + size) > (CFG_SDRAM_BASE + (u64)gd->ram_size))
92 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
93 if ((bootmap_base + size) > get_effective_memsize())
94 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
95 #endif
96
97 size = min(size, get_effective_memsize());
98 size = min(size, CFG_LINUX_LOWMEM_MAX_SIZE);
99
100 if (size < getenv_bootm_size()) {
101 ulong base = bootmap_base + size;
102 printf("WARNING: adjusting available memory to %x\n", size);
103 lmb_reserve(lmb, base, getenv_bootm_size() - size);
104 }
105
106 /*
107 * Booting a (Linux) kernel image
108 *
109 * Allocate space for command line and board info - the
110 * address should be as high as possible within the reach of
111 * the kernel (see CFG_BOOTMAPSZ settings), but in unused
112 * memory, which means far enough below the current stack
113 * pointer.
114 */
115 sp = get_sp();
116 debug ("## Current stack ends at 0x%08lx\n", sp);
117
118 /* adjust sp by 1K to be safe */
119 sp -= 1024;
120 lmb_reserve(lmb, sp, (CFG_SDRAM_BASE + get_effective_memsize() - sp));
121
122 #if defined(CONFIG_OF_LIBFDT)
123 /* find flattened device tree */
124 ret = boot_get_fdt (cmdtp, flag, argc, argv, images, &of_flat_tree, &of_size);
125
126 if (ret)
127 goto error;
128 #endif
129
130 if (!of_size) {
131 /* allocate space and init command line */
132 ret = boot_get_cmdline (lmb, &cmd_start, &cmd_end, bootmap_base);
133 if (ret) {
134 puts("ERROR with allocation of cmdline\n");
135 goto error;
136 }
137
138 /* allocate space for kernel copy of board info */
139 ret = boot_get_kbd (lmb, &kbd, bootmap_base);
140 if (ret) {
141 puts("ERROR with allocation of kernel bd\n");
142 goto error;
143 }
144 set_clocks_in_mhz(kbd);
145 }
146
147 /* find kernel entry point */
148 if (images->legacy_hdr_valid) {
149 ep = image_get_ep (&images->legacy_hdr_os_copy);
150 #if defined(CONFIG_FIT)
151 } else if (images->fit_uname_os) {
152 ret = fit_image_get_entry (images->fit_hdr_os,
153 images->fit_noffset_os, &ep);
154 if (ret) {
155 puts ("Can't get entry point property!\n");
156 goto error;
157 }
158 #endif
159 } else {
160 puts ("Could not find kernel entry point!\n");
161 goto error;
162 }
163 kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))ep;
164
165 /* find ramdisk */
166 ret = boot_get_ramdisk (argc, argv, images, IH_ARCH_PPC,
167 &rd_data_start, &rd_data_end);
168 if (ret)
169 goto error;
170
171 rd_len = rd_data_end - rd_data_start;
172
173 #if defined(CONFIG_OF_LIBFDT)
174 ret = boot_relocate_fdt (lmb, bootmap_base,
175 cmdtp, flag, argc, argv, &of_flat_tree, &of_size);
176
177 /*
178 * Add the chosen node if it doesn't exist, add the env and bd_t
179 * if the user wants it (the logic is in the subroutines).
180 */
181 if (of_size) {
182 /* pass in dummy initrd info, we'll fix up later */
183 if (fdt_chosen(of_flat_tree, rd_data_start, rd_data_end, 0) < 0) {
184 fdt_error ("/chosen node create failed");
185 goto error;
186 }
187 #ifdef CONFIG_OF_BOARD_SETUP
188 /* Call the board-specific fixup routine */
189 ft_board_setup(of_flat_tree, gd->bd);
190 #endif
191 }
192 #endif /* CONFIG_OF_LIBFDT */
193
194 ret = boot_ramdisk_high (lmb, rd_data_start, rd_len, &initrd_start, &initrd_end);
195 if (ret)
196 goto error;
197
198 #if defined(CONFIG_OF_LIBFDT)
199 /* fixup the initrd now that we know where it should be */
200 if ((of_flat_tree) && (initrd_start && initrd_end)) {
201 uint64_t addr, size;
202 int total = fdt_num_mem_rsv(of_flat_tree);
203 int j;
204
205 /* Look for the dummy entry and delete it */
206 for (j = 0; j < total; j++) {
207 fdt_get_mem_rsv(of_flat_tree, j, &addr, &size);
208 if (addr == rd_data_start) {
209 fdt_del_mem_rsv(of_flat_tree, j);
210 break;
211 }
212 }
213
214 ret = fdt_add_mem_rsv(of_flat_tree, initrd_start,
215 initrd_end - initrd_start + 1);
216 if (ret < 0) {
217 printf("fdt_chosen: %s\n", fdt_strerror(ret));
218 goto error;
219 }
220
221 do_fixup_by_path_u32(of_flat_tree, "/chosen",
222 "linux,initrd-start", initrd_start, 0);
223 do_fixup_by_path_u32(of_flat_tree, "/chosen",
224 "linux,initrd-end", initrd_end, 0);
225 }
226 #endif
227 debug ("## Transferring control to Linux (at address %08lx) ...\n",
228 (ulong)kernel);
229
230 show_boot_progress (15);
231
232 #if defined(CFG_INIT_RAM_LOCK) && !defined(CONFIG_E500)
233 unlock_ram_in_cache();
234 #endif
235 if (!images->autostart)
236 return ;
237
238 #if defined(CONFIG_OF_LIBFDT)
239 if (of_flat_tree) { /* device tree; boot new style */
240 /*
241 * Linux Kernel Parameters (passing device tree):
242 * r3: pointer to the fdt, followed by the board info data
243 * r4: physical pointer to the kernel itself
244 * r5: NULL
245 * r6: NULL
246 * r7: NULL
247 */
248 debug (" Booting using OF flat tree...\n");
249 (*kernel) ((bd_t *)of_flat_tree, (ulong)kernel, 0, 0, 0);
250 /* does not return */
251 } else
252 #endif
253 {
254 /*
255 * Linux Kernel Parameters (passing board info data):
256 * r3: ptr to board info data
257 * r4: initrd_start or 0 if no initrd
258 * r5: initrd_end - unused if r4 is 0
259 * r6: Start of command line string
260 * r7: End of command line string
261 */
262 debug (" Booting using board info...\n");
263 (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
264 /* does not return */
265 }
266 return ;
267
268 error:
269 if (images->autostart)
270 do_reset (cmdtp, flag, argc, argv);
271 return ;
272 }
273
274 static ulong get_sp (void)
275 {
276 ulong sp;
277
278 asm( "mr %0,1": "=r"(sp) : );
279 return sp;
280 }
281
282 static void set_clocks_in_mhz (bd_t *kbd)
283 {
284 char *s;
285
286 if ((s = getenv ("clocks_in_mhz")) != NULL) {
287 /* convert all clock information to MHz */
288 kbd->bi_intfreq /= 1000000L;
289 kbd->bi_busfreq /= 1000000L;
290 #if defined(CONFIG_MPC8220)
291 kbd->bi_inpfreq /= 1000000L;
292 kbd->bi_pcifreq /= 1000000L;
293 kbd->bi_pevfreq /= 1000000L;
294 kbd->bi_flbfreq /= 1000000L;
295 kbd->bi_vcofreq /= 1000000L;
296 #endif
297 #if defined(CONFIG_CPM2)
298 kbd->bi_cpmfreq /= 1000000L;
299 kbd->bi_brgfreq /= 1000000L;
300 kbd->bi_sccfreq /= 1000000L;
301 kbd->bi_vco /= 1000000L;
302 #endif
303 #if defined(CONFIG_MPC5xxx)
304 kbd->bi_ipbfreq /= 1000000L;
305 kbd->bi_pcifreq /= 1000000L;
306 #endif /* CONFIG_MPC5xxx */
307 }
308 }
309
310 #if defined(CONFIG_OF_LIBFDT)
311 static void fdt_error (const char *msg)
312 {
313 puts ("ERROR: ");
314 puts (msg);
315 puts (" - must RESET the board to recover.\n");
316 }
317
318 static image_header_t *image_get_fdt (ulong fdt_addr)
319 {
320 image_header_t *fdt_hdr = (image_header_t *)fdt_addr;
321
322 image_print_contents (fdt_hdr);
323
324 puts (" Verifying Checksum ... ");
325 if (!image_check_hcrc (fdt_hdr)) {
326 fdt_error ("fdt header checksum invalid");
327 return NULL;
328 }
329
330 if (!image_check_dcrc (fdt_hdr)) {
331 fdt_error ("fdt checksum invalid");
332 return NULL;
333 }
334 puts ("OK\n");
335
336 if (!image_check_type (fdt_hdr, IH_TYPE_FLATDT)) {
337 fdt_error ("uImage is not a fdt");
338 return NULL;
339 }
340 if (image_get_comp (fdt_hdr) != IH_COMP_NONE) {
341 fdt_error ("uImage is compressed");
342 return NULL;
343 }
344 if (fdt_check_header ((char *)image_get_data (fdt_hdr)) != 0) {
345 fdt_error ("uImage data is not a fdt");
346 return NULL;
347 }
348 return fdt_hdr;
349 }
350
351 /**
352 * fit_check_fdt - verify FIT format FDT subimage
353 * @fit_hdr: pointer to the FIT header
354 * fdt_noffset: FDT subimage node offset within FIT image
355 * @verify: data CRC verification flag
356 *
357 * fit_check_fdt() verifies integrity of the FDT subimage and from
358 * specified FIT image.
359 *
360 * returns:
361 * 1, on success
362 * 0, on failure
363 */
364 #if defined(CONFIG_FIT)
365 static int fit_check_fdt (const void *fit, int fdt_noffset, int verify)
366 {
367 fit_image_print (fit, fdt_noffset, " ");
368
369 if (verify) {
370 puts (" Verifying Hash Integrity ... ");
371 if (!fit_image_check_hashes (fit, fdt_noffset)) {
372 fdt_error ("Bad Data Hash");
373 return 0;
374 }
375 puts ("OK\n");
376 }
377
378 if (!fit_image_check_type (fit, fdt_noffset, IH_TYPE_FLATDT)) {
379 fdt_error ("Not a FDT image");
380 return 0;
381 }
382
383 if (!fit_image_check_comp (fit, fdt_noffset, IH_COMP_NONE)) {
384 fdt_error ("FDT image is compressed");
385 return 0;
386 }
387
388 return 1;
389 }
390 #endif /* CONFIG_FIT */
391
392 static int boot_get_fdt (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
393 bootm_headers_t *images, char **of_flat_tree, ulong *of_size)
394 {
395 ulong fdt_addr;
396 image_header_t *fdt_hdr;
397 char *fdt_blob = NULL;
398 ulong image_start, image_end;
399 ulong load_start, load_end;
400 #if defined(CONFIG_FIT)
401 void *fit_hdr;
402 const char *fit_uname_config = NULL;
403 const char *fit_uname_fdt = NULL;
404 ulong default_addr;
405 int cfg_noffset;
406 int fdt_noffset;
407 const void *data;
408 size_t size;
409 #endif
410
411 *of_flat_tree = NULL;
412 *of_size = 0;
413
414 if (argc > 3 || genimg_has_config (images)) {
415 #if defined(CONFIG_FIT)
416 if (argc > 3) {
417 /*
418 * If the FDT blob comes from the FIT image and the
419 * FIT image address is omitted in the command line
420 * argument, try to use ramdisk or os FIT image
421 * address or default load address.
422 */
423 if (images->fit_uname_rd)
424 default_addr = (ulong)images->fit_hdr_rd;
425 else if (images->fit_uname_os)
426 default_addr = (ulong)images->fit_hdr_os;
427 else
428 default_addr = load_addr;
429
430 if (fit_parse_conf (argv[3], default_addr,
431 &fdt_addr, &fit_uname_config)) {
432 debug ("* fdt: config '%s' from image at 0x%08lx\n",
433 fit_uname_config, fdt_addr);
434 } else if (fit_parse_subimage (argv[3], default_addr,
435 &fdt_addr, &fit_uname_fdt)) {
436 debug ("* fdt: subimage '%s' from image at 0x%08lx\n",
437 fit_uname_fdt, fdt_addr);
438 } else
439 #endif
440 {
441 fdt_addr = simple_strtoul(argv[3], NULL, 16);
442 debug ("* fdt: cmdline image address = 0x%08lx\n",
443 fdt_addr);
444 }
445 #if defined(CONFIG_FIT)
446 } else {
447 /* use FIT configuration provided in first bootm
448 * command argument
449 */
450 fdt_addr = (ulong)images->fit_hdr_os;
451 fit_uname_config = images->fit_uname_cfg;
452 debug ("* fdt: using config '%s' from image at 0x%08lx\n",
453 fit_uname_config, fdt_addr);
454
455 /*
456 * Check whether configuration has FDT blob defined,
457 * if not quit silently.
458 */
459 fit_hdr = (void *)fdt_addr;
460 cfg_noffset = fit_conf_get_node (fit_hdr,
461 fit_uname_config);
462 if (cfg_noffset < 0) {
463 debug ("* fdt: no such config\n");
464 return 0;
465 }
466
467 fdt_noffset = fit_conf_get_fdt_node (fit_hdr,
468 cfg_noffset);
469 if (fdt_noffset < 0) {
470 debug ("* fdt: no fdt in config\n");
471 return 0;
472 }
473 }
474 #endif
475
476 debug ("## Checking for 'FDT'/'FDT Image' at %08lx\n",
477 fdt_addr);
478
479 /* copy from dataflash if needed */
480 fdt_addr = genimg_get_image (fdt_addr);
481
482 /*
483 * Check if there is an FDT image at the
484 * address provided in the second bootm argument
485 * check image type, for FIT images get a FIT node.
486 */
487 switch (genimg_get_format ((void *)fdt_addr)) {
488 case IMAGE_FORMAT_LEGACY:
489 /* verify fdt_addr points to a valid image header */
490 printf ("## Flattened Device Tree from Legacy Image at %08lx\n",
491 fdt_addr);
492 fdt_hdr = image_get_fdt (fdt_addr);
493 if (!fdt_hdr)
494 goto error;
495
496 /*
497 * move image data to the load address,
498 * make sure we don't overwrite initial image
499 */
500 image_start = (ulong)fdt_hdr;
501 image_end = image_get_image_end (fdt_hdr);
502
503 load_start = image_get_load (fdt_hdr);
504 load_end = load_start + image_get_data_size (fdt_hdr);
505
506 if ((load_start < image_end) && (load_end > image_start)) {
507 fdt_error ("fdt overwritten");
508 goto error;
509 }
510
511 debug (" Loading FDT from 0x%08lx to 0x%08lx\n",
512 image_get_data (fdt_hdr), load_start);
513
514 memmove ((void *)load_start,
515 (void *)image_get_data (fdt_hdr),
516 image_get_data_size (fdt_hdr));
517
518 fdt_blob = (char *)load_start;
519 break;
520 case IMAGE_FORMAT_FIT:
521 /*
522 * This case will catch both: new uImage format
523 * (libfdt based) and raw FDT blob (also libfdt
524 * based).
525 */
526 #if defined(CONFIG_FIT)
527 /* check FDT blob vs FIT blob */
528 if (fit_check_format ((const void *)fdt_addr)) {
529 /*
530 * FIT image
531 */
532 fit_hdr = (void *)fdt_addr;
533 printf ("## Flattened Device Tree from FIT Image at %08lx\n",
534 fdt_addr);
535
536 if (!fit_uname_fdt) {
537 /*
538 * no FDT blob image node unit name,
539 * try to get config node first. If
540 * config unit node name is NULL
541 * fit_conf_get_node() will try to
542 * find default config node
543 */
544 cfg_noffset = fit_conf_get_node (fit_hdr,
545 fit_uname_config);
546
547 if (cfg_noffset < 0) {
548 fdt_error ("Could not find configuration node\n");
549 goto error;
550 }
551
552 fit_uname_config = fdt_get_name (fit_hdr,
553 cfg_noffset, NULL);
554 printf (" Using '%s' configuration\n",
555 fit_uname_config);
556
557 fdt_noffset = fit_conf_get_fdt_node (fit_hdr,
558 cfg_noffset);
559 fit_uname_fdt = fit_get_name (fit_hdr,
560 fdt_noffset, NULL);
561 } else {
562 /* get FDT component image node offset */
563 fdt_noffset = fit_image_get_node (fit_hdr,
564 fit_uname_fdt);
565 }
566 if (fdt_noffset < 0) {
567 fdt_error ("Could not find subimage node\n");
568 goto error;
569 }
570
571 printf (" Trying '%s' FDT blob subimage\n",
572 fit_uname_fdt);
573
574 if (!fit_check_fdt (fit_hdr, fdt_noffset,
575 images->verify))
576 goto error;
577
578 /* get ramdisk image data address and length */
579 if (fit_image_get_data (fit_hdr, fdt_noffset,
580 &data, &size)) {
581 fdt_error ("Could not find FDT subimage data");
582 goto error;
583 }
584
585 /* verift that image data is a proper FDT blob */
586 if (fdt_check_header ((char *)data) != 0) {
587 fdt_error ("Subimage data is not a FTD");
588 goto error;
589 }
590
591 /*
592 * move image data to the load address,
593 * make sure we don't overwrite initial image
594 */
595 image_start = (ulong)fit_hdr;
596 image_end = fit_get_end (fit_hdr);
597
598 if (fit_image_get_load (fit_hdr, fdt_noffset,
599 &load_start) == 0) {
600 load_end = load_start + size;
601
602 if ((load_start < image_end) &&
603 (load_end > image_start)) {
604 fdt_error ("FDT overwritten");
605 goto error;
606 }
607
608 printf (" Loading FDT from 0x%08lx to 0x%08lx\n",
609 (ulong)data, load_start);
610
611 memmove ((void *)load_start,
612 (void *)data, size);
613
614 fdt_blob = (char *)load_start;
615 } else {
616 fdt_blob = (char *)data;
617 }
618
619 images->fit_hdr_fdt = fit_hdr;
620 images->fit_uname_fdt = fit_uname_fdt;
621 images->fit_noffset_fdt = fdt_noffset;
622 break;
623 } else
624 #endif
625 {
626 /*
627 * FDT blob
628 */
629 fdt_blob = (char *)fdt_addr;
630 debug ("* fdt: raw FDT blob\n");
631 printf ("## Flattened Device Tree blob at %08lx\n", fdt_blob);
632 }
633 break;
634 default:
635 fdt_error ("Did not find a cmdline Flattened Device Tree");
636 goto error;
637 }
638
639 printf (" Booting using the fdt blob at 0x%x\n", fdt_blob);
640
641 } else if (images->legacy_hdr_valid &&
642 image_check_type (&images->legacy_hdr_os_copy, IH_TYPE_MULTI)) {
643
644 ulong fdt_data, fdt_len;
645
646 /*
647 * Now check if we have a legacy multi-component image,
648 * get second entry data start address and len.
649 */
650 printf ("## Flattened Device Tree from multi "
651 "component Image at %08lX\n",
652 (ulong)images->legacy_hdr_os);
653
654 image_multi_getimg (images->legacy_hdr_os, 2, &fdt_data, &fdt_len);
655 if (fdt_len) {
656
657 fdt_blob = (char *)fdt_data;
658 printf (" Booting using the fdt at 0x%x\n", fdt_blob);
659
660 if (fdt_check_header (fdt_blob) != 0) {
661 fdt_error ("image is not a fdt");
662 goto error;
663 }
664
665 if (be32_to_cpu (fdt_totalsize (fdt_blob)) != fdt_len) {
666 fdt_error ("fdt size != image size");
667 goto error;
668 }
669 } else {
670 debug ("## No Flattened Device Tree\n");
671 return 0;
672 }
673 } else {
674 debug ("## No Flattened Device Tree\n");
675 return 0;
676 }
677
678 *of_flat_tree = fdt_blob;
679 *of_size = be32_to_cpu (fdt_totalsize (fdt_blob));
680 debug (" of_flat_tree at 0x%08lx size 0x%08lx\n",
681 *of_flat_tree, *of_size);
682
683 return 0;
684
685 error:
686 do_reset (cmdtp, flag, argc, argv);
687 return 1;
688 }
689
690 static int boot_relocate_fdt (struct lmb *lmb, ulong bootmap_base,
691 cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
692 char **of_flat_tree, ulong *of_size)
693 {
694 char *fdt_blob = *of_flat_tree;
695 ulong relocate = 0;
696 ulong of_len = 0;
697
698 /* nothing to do */
699 if (*of_size == 0)
700 return 0;
701
702 if (fdt_check_header (fdt_blob) != 0) {
703 fdt_error ("image is not a fdt");
704 goto error;
705 }
706
707 #ifndef CFG_NO_FLASH
708 /* move the blob if it is in flash (set relocate) */
709 if (addr2info ((ulong)fdt_blob) != NULL)
710 relocate = 1;
711 #endif
712
713 /*
714 * The blob must be within CFG_BOOTMAPSZ,
715 * so we flag it to be copied if it is not.
716 */
717 if (fdt_blob >= (char *)CFG_BOOTMAPSZ)
718 relocate = 1;
719
720 of_len = be32_to_cpu (fdt_totalsize (fdt_blob));
721
722 /* move flattend device tree if needed */
723 if (relocate) {
724 int err;
725 ulong of_start;
726
727 /* position on a 4K boundary before the alloc_current */
728 of_start = lmb_alloc_base(lmb, of_len, 0x1000,
729 (CFG_BOOTMAPSZ + bootmap_base));
730
731 if (of_start == 0) {
732 puts("device tree - allocation error\n");
733 goto error;
734 }
735
736 debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
737 (ulong)fdt_blob, (ulong)fdt_blob + of_len - 1,
738 of_len, of_len);
739
740 printf (" Loading Device Tree to %08lx, end %08lx ... ",
741 of_start, of_start + of_len - 1);
742
743 err = fdt_open_into (fdt_blob, (void *)of_start, of_len);
744 if (err != 0) {
745 fdt_error ("fdt move failed");
746 goto error;
747 }
748 puts ("OK\n");
749
750 *of_flat_tree = (char *)of_start;
751 } else {
752 *of_flat_tree = fdt_blob;
753 lmb_reserve(lmb, (ulong)working_fdt, of_len);
754 }
755
756 return 0;
757
758 error:
759 return 1;
760 }
761 #endif
"Das U-Boot" Source Tree