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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 #ifndef CFG_FDT_PAD
55 #define CFG_FDT_PAD 0x3000
56 #endif
57
58 DECLARE_GLOBAL_DATA_PTR;
59
60 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
61 extern ulong get_effective_memsize(void);
62 static ulong get_sp (void);
63 static void set_clocks_in_mhz (bd_t *kbd);
64
65 #ifndef CFG_LINUX_LOWMEM_MAX_SIZE
66 #define CFG_LINUX_LOWMEM_MAX_SIZE       (768*1024*1024)
67 #endif
68
69 void  __attribute__((noinline))
70 do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
71                 bootm_headers_t *images)
72 {
73         ulong   sp;
74
75         ulong   initrd_start, initrd_end;
76         ulong   rd_data_start, rd_data_end, rd_len;
77         ulong   size;
78         phys_size_t bootm_size;
79
80         ulong   cmd_start, cmd_end, bootmap_base;
81         bd_t    *kbd;
82         ulong   ep = 0;
83         void    (*kernel)(bd_t *, ulong, ulong, ulong, ulong);
84         int     ret;
85         ulong   of_size = 0;
86         struct lmb *lmb = images->lmb;
87
88 #if defined(CONFIG_OF_LIBFDT)
89         char    *of_flat_tree = NULL;
90 #endif
91
92         bootmap_base = getenv_bootm_low();
93         bootm_size = getenv_bootm_size();
94
95 #ifdef DEBUG
96         if (((u64)bootmap_base + bootm_size) >
97             (CFG_SDRAM_BASE + (u64)gd->ram_size))
98                 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
99         if ((bootmap_base + bootm_size) > get_effective_memsize())
100                 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
101 #endif
102
103         size = min(bootm_size, get_effective_memsize());
104         size = min(size, CFG_LINUX_LOWMEM_MAX_SIZE);
105
106         if (size < bootm_size) {
107                 ulong base = bootmap_base + size;
108                 printf("WARNING: adjusting available memory to %lx\n", size);
109                 lmb_reserve(lmb, base, bootm_size - size);
110         }
111
112         /*
113          * Booting a (Linux) kernel image
114          *
115          * Allocate space for command line and board info - the
116          * address should be as high as possible within the reach of
117          * the kernel (see CFG_BOOTMAPSZ settings), but in unused
118          * memory, which means far enough below the current stack
119          * pointer.
120          */
121         sp = get_sp();
122         debug ("## Current stack ends at 0x%08lx\n", sp);
123
124         /* adjust sp by 1K to be safe */
125         sp -= 1024;
126         lmb_reserve(lmb, sp, (CFG_SDRAM_BASE + get_effective_memsize() - sp));
127
128 #if defined(CONFIG_OF_LIBFDT)
129         /* find flattened device tree */
130         ret = boot_get_fdt (cmdtp, flag, argc, argv, images, &of_flat_tree, &of_size);
131
132         if (ret)
133                 goto error;
134 #endif
135
136         if (!of_size) {
137                 /* allocate space and init command line */
138                 ret = boot_get_cmdline (lmb, &cmd_start, &cmd_end, bootmap_base);
139                 if (ret) {
140                         puts("ERROR with allocation of cmdline\n");
141                         goto error;
142                 }
143
144                 /* allocate space for kernel copy of board info */
145                 ret = boot_get_kbd (lmb, &kbd, bootmap_base);
146                 if (ret) {
147                         puts("ERROR with allocation of kernel bd\n");
148                         goto error;
149                 }
150                 set_clocks_in_mhz(kbd);
151         }
152
153         /* find kernel entry point */
154         if (images->legacy_hdr_valid) {
155                 ep = image_get_ep (&images->legacy_hdr_os_copy);
156 #if defined(CONFIG_FIT)
157         } else if (images->fit_uname_os) {
158                 ret = fit_image_get_entry (images->fit_hdr_os,
159                                 images->fit_noffset_os, &ep);
160                 if (ret) {
161                         puts ("Can't get entry point property!\n");
162                         goto error;
163                 }
164 #endif
165         } else {
166                 puts ("Could not find kernel entry point!\n");
167                 goto error;
168         }
169         kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))ep;
170
171         /* find ramdisk */
172         ret = boot_get_ramdisk (argc, argv, images, IH_ARCH_PPC,
173                         &rd_data_start, &rd_data_end);
174         if (ret)
175                 goto error;
176
177         rd_len = rd_data_end - rd_data_start;
178
179 #if defined(CONFIG_OF_LIBFDT)
180         ret = boot_relocate_fdt (lmb, bootmap_base,
181                 cmdtp, flag, argc, argv, &of_flat_tree, &of_size);
182
183         /*
184          * Add the chosen node if it doesn't exist, add the env and bd_t
185          * if the user wants it (the logic is in the subroutines).
186          */
187         if (of_size) {
188                 /* pass in dummy initrd info, we'll fix up later */
189                 if (fdt_chosen(of_flat_tree, rd_data_start, rd_data_end, 0) < 0) {
190                         fdt_error ("/chosen node create failed");
191                         goto error;
192                 }
193 #ifdef CONFIG_OF_BOARD_SETUP
194                 /* Call the board-specific fixup routine */
195                 ft_board_setup(of_flat_tree, gd->bd);
196 #endif
197         }
198
199         /* Fixup the fdt memreserve now that we know how big it is */
200         if (of_flat_tree) {
201                 int j;
202                 uint64_t addr, size;
203                 int total = fdt_num_mem_rsv(of_flat_tree);
204                 uint actualsize;
205
206                 for (j = 0; j < total; j++) {
207                         fdt_get_mem_rsv(of_flat_tree, j, &addr, &size);
208                         if (addr == (uint64_t)(u32)of_flat_tree) {
209                                 fdt_del_mem_rsv(of_flat_tree, j);
210                                 break;
211                         }
212                 }
213
214                 /* Delete the old LMB reservation */
215                 lmb_free(lmb, (phys_addr_t)(u32)of_flat_tree,
216                                 (phys_size_t)fdt_totalsize(of_flat_tree));
217
218                 /* Calculate the actual size of the fdt */
219                 actualsize = fdt_off_dt_strings(of_flat_tree) +
220                         fdt_size_dt_strings(of_flat_tree);
221
222                 /* Make it so the fdt ends on a page boundary */
223                 actualsize = ALIGN(actualsize, 0x1000);
224                 actualsize = actualsize - ((uint)of_flat_tree & 0xfff);
225
226                 /* Change the fdt header to reflect the correct size */
227                 fdt_set_totalsize(of_flat_tree, actualsize);
228                 of_size = actualsize;
229
230                 /* Add the new reservation */
231                 ret = fdt_add_mem_rsv(of_flat_tree, (uint)of_flat_tree,
232                                 of_size);
233
234                 /* Create a new LMB reservation */
235                 lmb_reserve(lmb, (ulong)of_flat_tree, of_size);
236         }
237 #endif  /* CONFIG_OF_LIBFDT */
238
239         ret = boot_ramdisk_high (lmb, rd_data_start, rd_len, &initrd_start, &initrd_end);
240         if (ret)
241                 goto error;
242
243 #if defined(CONFIG_OF_LIBFDT)
244         /* fixup the initrd now that we know where it should be */
245         if ((of_flat_tree) && (initrd_start && initrd_end)) {
246                 uint64_t addr, size;
247                 int  total = fdt_num_mem_rsv(of_flat_tree);
248                 int  j;
249
250                 /* Look for the dummy entry and delete it */
251                 for (j = 0; j < total; j++) {
252                         fdt_get_mem_rsv(of_flat_tree, j, &addr, &size);
253                         if (addr == rd_data_start) {
254                                 fdt_del_mem_rsv(of_flat_tree, j);
255                                 break;
256                         }
257                 }
258
259                 ret = fdt_add_mem_rsv(of_flat_tree, initrd_start,
260                                         initrd_end - initrd_start + 1);
261                 if (ret < 0) {
262                         printf("fdt_chosen: %s\n", fdt_strerror(ret));
263                         goto error;
264                 }
265
266                 do_fixup_by_path_u32(of_flat_tree, "/chosen",
267                                         "linux,initrd-start", initrd_start, 0);
268                 do_fixup_by_path_u32(of_flat_tree, "/chosen",
269                                         "linux,initrd-end", initrd_end, 0);
270         }
271 #endif
272         debug ("## Transferring control to Linux (at address %08lx) ...\n",
273                 (ulong)kernel);
274
275         show_boot_progress (15);
276
277 #if defined(CFG_INIT_RAM_LOCK) && !defined(CONFIG_E500)
278         unlock_ram_in_cache();
279 #endif
280
281 #if defined(CONFIG_OF_LIBFDT)
282         if (of_flat_tree) {     /* device tree; boot new style */
283                 /*
284                  * Linux Kernel Parameters (passing device tree):
285                  *   r3: pointer to the fdt, followed by the board info data
286                  *   r4: physical pointer to the kernel itself
287                  *   r5: NULL
288                  *   r6: NULL
289                  *   r7: NULL
290                  */
291                 debug ("   Booting using OF flat tree...\n");
292                 (*kernel) ((bd_t *)of_flat_tree, (ulong)kernel, 0, 0, 0);
293                 /* does not return */
294         } else
295 #endif
296         {
297                 /*
298                  * Linux Kernel Parameters (passing board info data):
299                  *   r3: ptr to board info data
300                  *   r4: initrd_start or 0 if no initrd
301                  *   r5: initrd_end - unused if r4 is 0
302                  *   r6: Start of command line string
303                  *   r7: End   of command line string
304                  */
305                 debug ("   Booting using board info...\n");
306                 (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
307                 /* does not return */
308         }
309         return ;
310
311 error:
312         do_reset (cmdtp, flag, argc, argv);
313         return ;
314 }
315
316 static ulong get_sp (void)
317 {
318         ulong sp;
319
320         asm( "mr %0,1": "=r"(sp) : );
321         return sp;
322 }
323
324 static void set_clocks_in_mhz (bd_t *kbd)
325 {
326         char    *s;
327
328         if ((s = getenv ("clocks_in_mhz")) != NULL) {
329                 /* convert all clock information to MHz */
330                 kbd->bi_intfreq /= 1000000L;
331                 kbd->bi_busfreq /= 1000000L;
332 #if defined(CONFIG_MPC8220)
333                 kbd->bi_inpfreq /= 1000000L;
334                 kbd->bi_pcifreq /= 1000000L;
335                 kbd->bi_pevfreq /= 1000000L;
336                 kbd->bi_flbfreq /= 1000000L;
337                 kbd->bi_vcofreq /= 1000000L;
338 #endif
339 #if defined(CONFIG_CPM2)
340                 kbd->bi_cpmfreq /= 1000000L;
341                 kbd->bi_brgfreq /= 1000000L;
342                 kbd->bi_sccfreq /= 1000000L;
343                 kbd->bi_vco     /= 1000000L;
344 #endif
345 #if defined(CONFIG_MPC5xxx)
346                 kbd->bi_ipbfreq /= 1000000L;
347                 kbd->bi_pcifreq /= 1000000L;
348 #endif /* CONFIG_MPC5xxx */
349         }
350 }
351
352 #if defined(CONFIG_OF_LIBFDT)
353 static void fdt_error (const char *msg)
354 {
355         puts ("ERROR: ");
356         puts (msg);
357         puts (" - must RESET the board to recover.\n");
358 }
359
360 static image_header_t *image_get_fdt (ulong fdt_addr)
361 {
362         image_header_t *fdt_hdr = (image_header_t *)fdt_addr;
363
364         image_print_contents (fdt_hdr);
365
366         puts ("   Verifying Checksum ... ");
367         if (!image_check_hcrc (fdt_hdr)) {
368                 fdt_error ("fdt header checksum invalid");
369                 return NULL;
370         }
371
372         if (!image_check_dcrc (fdt_hdr)) {
373                 fdt_error ("fdt checksum invalid");
374                 return NULL;
375         }
376         puts ("OK\n");
377
378         if (!image_check_type (fdt_hdr, IH_TYPE_FLATDT)) {
379                 fdt_error ("uImage is not a fdt");
380                 return NULL;
381         }
382         if (image_get_comp (fdt_hdr) != IH_COMP_NONE) {
383                 fdt_error ("uImage is compressed");
384                 return NULL;
385         }
386         if (fdt_check_header ((char *)image_get_data (fdt_hdr)) != 0) {
387                 fdt_error ("uImage data is not a fdt");
388                 return NULL;
389         }
390         return fdt_hdr;
391 }
392
393 /**
394  * fit_check_fdt - verify FIT format FDT subimage
395  * @fit_hdr: pointer to the FIT  header
396  * fdt_noffset: FDT subimage node offset within FIT image
397  * @verify: data CRC verification flag
398  *
399  * fit_check_fdt() verifies integrity of the FDT subimage and from
400  * specified FIT image.
401  *
402  * returns:
403  *     1, on success
404  *     0, on failure
405  */
406 #if defined(CONFIG_FIT)
407 static int fit_check_fdt (const void *fit, int fdt_noffset, int verify)
408 {
409         fit_image_print (fit, fdt_noffset, "   ");
410
411         if (verify) {
412                 puts ("   Verifying Hash Integrity ... ");
413                 if (!fit_image_check_hashes (fit, fdt_noffset)) {
414                         fdt_error ("Bad Data Hash");
415                         return 0;
416                 }
417                 puts ("OK\n");
418         }
419
420         if (!fit_image_check_type (fit, fdt_noffset, IH_TYPE_FLATDT)) {
421                 fdt_error ("Not a FDT image");
422                 return 0;
423         }
424
425         if (!fit_image_check_comp (fit, fdt_noffset, IH_COMP_NONE)) {
426                 fdt_error ("FDT image is compressed");
427                 return 0;
428         }
429
430         return 1;
431 }
432 #endif /* CONFIG_FIT */
433
434 static int boot_get_fdt (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
435                 bootm_headers_t *images, char **of_flat_tree, ulong *of_size)
436 {
437         ulong           fdt_addr;
438         image_header_t  *fdt_hdr;
439         char            *fdt_blob = NULL;
440         ulong           image_start, image_end;
441         ulong           load_start, load_end;
442 #if defined(CONFIG_FIT)
443         void            *fit_hdr;
444         const char      *fit_uname_config = NULL;
445         const char      *fit_uname_fdt = NULL;
446         ulong           default_addr;
447         int             cfg_noffset;
448         int             fdt_noffset;
449         const void      *data;
450         size_t          size;
451 #endif
452
453         *of_flat_tree = NULL;
454         *of_size = 0;
455
456         if (argc > 3 || genimg_has_config (images)) {
457 #if defined(CONFIG_FIT)
458                 if (argc > 3) {
459                         /*
460                          * If the FDT blob comes from the FIT image and the
461                          * FIT image address is omitted in the command line
462                          * argument, try to use ramdisk or os FIT image
463                          * address or default load address.
464                          */
465                         if (images->fit_uname_rd)
466                                 default_addr = (ulong)images->fit_hdr_rd;
467                         else if (images->fit_uname_os)
468                                 default_addr = (ulong)images->fit_hdr_os;
469                         else
470                                 default_addr = load_addr;
471
472                         if (fit_parse_conf (argv[3], default_addr,
473                                                 &fdt_addr, &fit_uname_config)) {
474                                 debug ("*  fdt: config '%s' from image at 0x%08lx\n",
475                                                 fit_uname_config, fdt_addr);
476                         } else if (fit_parse_subimage (argv[3], default_addr,
477                                                 &fdt_addr, &fit_uname_fdt)) {
478                                 debug ("*  fdt: subimage '%s' from image at 0x%08lx\n",
479                                                 fit_uname_fdt, fdt_addr);
480                         } else
481 #endif
482                         {
483                                 fdt_addr = simple_strtoul(argv[3], NULL, 16);
484                                 debug ("*  fdt: cmdline image address = 0x%08lx\n",
485                                                 fdt_addr);
486                         }
487 #if defined(CONFIG_FIT)
488                 } else {
489                         /* use FIT configuration provided in first bootm
490                          * command argument
491                          */
492                         fdt_addr = (ulong)images->fit_hdr_os;
493                         fit_uname_config = images->fit_uname_cfg;
494                         debug ("*  fdt: using config '%s' from image at 0x%08lx\n",
495                                         fit_uname_config, fdt_addr);
496
497                         /*
498                          * Check whether configuration has FDT blob defined,
499                          * if not quit silently.
500                          */
501                         fit_hdr = (void *)fdt_addr;
502                         cfg_noffset = fit_conf_get_node (fit_hdr,
503                                         fit_uname_config);
504                         if (cfg_noffset < 0) {
505                                 debug ("*  fdt: no such config\n");
506                                 return 0;
507                         }
508
509                         fdt_noffset = fit_conf_get_fdt_node (fit_hdr,
510                                         cfg_noffset);
511                         if (fdt_noffset < 0) {
512                                 debug ("*  fdt: no fdt in config\n");
513                                 return 0;
514                         }
515                 }
516 #endif
517
518                 debug ("## Checking for 'FDT'/'FDT Image' at %08lx\n",
519                                 fdt_addr);
520
521                 /* copy from dataflash if needed */
522                 fdt_addr = genimg_get_image (fdt_addr);
523
524                 /*
525                  * Check if there is an FDT image at the
526                  * address provided in the second bootm argument
527                  * check image type, for FIT images get a FIT node.
528                  */
529                 switch (genimg_get_format ((void *)fdt_addr)) {
530                 case IMAGE_FORMAT_LEGACY:
531                         /* verify fdt_addr points to a valid image header */
532                         printf ("## Flattened Device Tree from Legacy Image at %08lx\n",
533                                         fdt_addr);
534                         fdt_hdr = image_get_fdt (fdt_addr);
535                         if (!fdt_hdr)
536                                 goto error;
537
538                         /*
539                          * move image data to the load address,
540                          * make sure we don't overwrite initial image
541                          */
542                         image_start = (ulong)fdt_hdr;
543                         image_end = image_get_image_end (fdt_hdr);
544
545                         load_start = image_get_load (fdt_hdr);
546                         load_end = load_start + image_get_data_size (fdt_hdr);
547
548                         if ((load_start < image_end) && (load_end > image_start)) {
549                                 fdt_error ("fdt overwritten");
550                                 goto error;
551                         }
552
553                         debug ("   Loading FDT from 0x%08lx to 0x%08lx\n",
554                                         image_get_data (fdt_hdr), load_start);
555
556                         memmove ((void *)load_start,
557                                         (void *)image_get_data (fdt_hdr),
558                                         image_get_data_size (fdt_hdr));
559
560                         fdt_blob = (char *)load_start;
561                         break;
562                 case IMAGE_FORMAT_FIT:
563                         /*
564                          * This case will catch both: new uImage format
565                          * (libfdt based) and raw FDT blob (also libfdt
566                          * based).
567                          */
568 #if defined(CONFIG_FIT)
569                         /* check FDT blob vs FIT blob */
570                         if (fit_check_format ((const void *)fdt_addr)) {
571                                 /*
572                                  * FIT image
573                                  */
574                                 fit_hdr = (void *)fdt_addr;
575                                 printf ("## Flattened Device Tree from FIT Image at %08lx\n",
576                                                 fdt_addr);
577
578                                 if (!fit_uname_fdt) {
579                                         /*
580                                          * no FDT blob image node unit name,
581                                          * try to get config node first. If
582                                          * config unit node name is NULL
583                                          * fit_conf_get_node() will try to
584                                          * find default config node
585                                          */
586                                         cfg_noffset = fit_conf_get_node (fit_hdr,
587                                                         fit_uname_config);
588
589                                         if (cfg_noffset < 0) {
590                                                 fdt_error ("Could not find configuration node\n");
591                                                 goto error;
592                                         }
593
594                                         fit_uname_config = fdt_get_name (fit_hdr,
595                                                         cfg_noffset, NULL);
596                                         printf ("   Using '%s' configuration\n",
597                                                         fit_uname_config);
598
599                                         fdt_noffset = fit_conf_get_fdt_node (fit_hdr,
600                                                         cfg_noffset);
601                                         fit_uname_fdt = fit_get_name (fit_hdr,
602                                                         fdt_noffset, NULL);
603                                 } else {
604                                         /* get FDT component image node offset */
605                                         fdt_noffset = fit_image_get_node (fit_hdr,
606                                                         fit_uname_fdt);
607                                 }
608                                 if (fdt_noffset < 0) {
609                                         fdt_error ("Could not find subimage node\n");
610                                         goto error;
611                                 }
612
613                                 printf ("   Trying '%s' FDT blob subimage\n",
614                                                 fit_uname_fdt);
615
616                                 if (!fit_check_fdt (fit_hdr, fdt_noffset,
617                                                         images->verify))
618                                         goto error;
619
620                                 /* get ramdisk image data address and length */
621                                 if (fit_image_get_data (fit_hdr, fdt_noffset,
622                                                         &data, &size)) {
623                                         fdt_error ("Could not find FDT subimage data");
624                                         goto error;
625                                 }
626
627                                 /* verift that image data is a proper FDT blob */
628                                 if (fdt_check_header ((char *)data) != 0) {
629                                         fdt_error ("Subimage data is not a FTD");
630                                         goto error;
631                                 }
632
633                                 /*
634                                  * move image data to the load address,
635                                  * make sure we don't overwrite initial image
636                                  */
637                                 image_start = (ulong)fit_hdr;
638                                 image_end = fit_get_end (fit_hdr);
639
640                                 if (fit_image_get_load (fit_hdr, fdt_noffset,
641                                                         &load_start) == 0) {
642                                         load_end = load_start + size;
643
644                                         if ((load_start < image_end) &&
645                                                         (load_end > image_start)) {
646                                                 fdt_error ("FDT overwritten");
647                                                 goto error;
648                                         }
649
650                                         printf ("   Loading FDT from 0x%08lx to 0x%08lx\n",
651                                                         (ulong)data, load_start);
652
653                                         memmove ((void *)load_start,
654                                                         (void *)data, size);
655
656                                         fdt_blob = (char *)load_start;
657                                 } else {
658                                         fdt_blob = (char *)data;
659                                 }
660
661                                 images->fit_hdr_fdt = fit_hdr;
662                                 images->fit_uname_fdt = fit_uname_fdt;
663                                 images->fit_noffset_fdt = fdt_noffset;
664                                 break;
665                         } else
666 #endif
667                         {
668                                 /*
669                                  * FDT blob
670                                  */
671                                 fdt_blob = (char *)fdt_addr;
672                                 debug ("*  fdt: raw FDT blob\n");
673                                 printf ("## Flattened Device Tree blob at %08lx\n", (long)fdt_blob);
674                         }
675                         break;
676                 default:
677                         fdt_error ("Did not find a cmdline Flattened Device Tree");
678                         goto error;
679                 }
680
681                 printf ("   Booting using the fdt blob at 0x%x\n", (int)fdt_blob);
682
683         } else if (images->legacy_hdr_valid &&
684                         image_check_type (&images->legacy_hdr_os_copy, IH_TYPE_MULTI)) {
685
686                 ulong fdt_data, fdt_len;
687
688                 /*
689                  * Now check if we have a legacy multi-component image,
690                  * get second entry data start address and len.
691                  */
692                 printf ("## Flattened Device Tree from multi "
693                         "component Image at %08lX\n",
694                         (ulong)images->legacy_hdr_os);
695
696                 image_multi_getimg (images->legacy_hdr_os, 2, &fdt_data, &fdt_len);
697                 if (fdt_len) {
698
699                         fdt_blob = (char *)fdt_data;
700                         printf ("   Booting using the fdt at 0x%x\n", (int)fdt_blob);
701
702                         if (fdt_check_header (fdt_blob) != 0) {
703                                 fdt_error ("image is not a fdt");
704                                 goto error;
705                         }
706
707                         if (be32_to_cpu (fdt_totalsize (fdt_blob)) != fdt_len) {
708                                 fdt_error ("fdt size != image size");
709                                 goto error;
710                         }
711                 } else {
712                         debug ("## No Flattened Device Tree\n");
713                         return 0;
714                 }
715         } else {
716                 debug ("## No Flattened Device Tree\n");
717                 return 0;
718         }
719
720         *of_flat_tree = fdt_blob;
721         *of_size = be32_to_cpu (fdt_totalsize (fdt_blob));
722         debug ("   of_flat_tree at 0x%08lx size 0x%08lx\n",
723                         *of_flat_tree, *of_size);
724
725         return 0;
726
727 error:
728         do_reset (cmdtp, flag, argc, argv);
729         return 1;
730 }
731
732 static int boot_relocate_fdt (struct lmb *lmb, ulong bootmap_base,
733                 cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
734                 char **of_flat_tree, ulong *of_size)
735 {
736         char    *fdt_blob = *of_flat_tree;
737         ulong   relocate = 0;
738         ulong   of_len = 0;
739
740         /* nothing to do */
741         if (*of_size == 0)
742                 return 0;
743
744         if (fdt_check_header (fdt_blob) != 0) {
745                 fdt_error ("image is not a fdt");
746                 goto error;
747         }
748
749 #ifndef CFG_NO_FLASH
750         /* move the blob if it is in flash (set relocate) */
751         if (addr2info ((ulong)fdt_blob) != NULL)
752                 relocate = 1;
753 #endif
754
755         /*
756          * The blob needs to be inside the boot mapping.
757          */
758         if (fdt_blob < (char *)bootmap_base)
759                 relocate = 1;
760
761         if ((fdt_blob + *of_size + CFG_FDT_PAD) >=
762                         ((char *)CFG_BOOTMAPSZ + bootmap_base))
763                 relocate = 1;
764
765         /* move flattend device tree if needed */
766         if (relocate) {
767                 int err;
768                 ulong of_start = 0;
769
770                 /* position on a 4K boundary before the alloc_current */
771                 /* Pad the FDT by a specified amount */
772                 of_len = *of_size + CFG_FDT_PAD;
773                 of_start = (unsigned long)lmb_alloc_base(lmb, of_len, 0x1000,
774                                 (CFG_BOOTMAPSZ + bootmap_base));
775
776                 if (of_start == 0) {
777                         puts("device tree - allocation error\n");
778                         goto error;
779                 }
780
781                 debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
782                         (ulong)fdt_blob, (ulong)fdt_blob + *of_size - 1,
783                         of_len, of_len);
784
785                 printf ("   Loading Device Tree to %08lx, end %08lx ... ",
786                         of_start, of_start + of_len - 1);
787
788                 err = fdt_open_into (fdt_blob, (void *)of_start, of_len);
789                 if (err != 0) {
790                         fdt_error ("fdt move failed");
791                         goto error;
792                 }
793                 puts ("OK\n");
794
795                 *of_flat_tree = (char *)of_start;
796                 *of_size = of_len;
797         } else {
798                 *of_flat_tree = fdt_blob;
799                 of_len = (CFG_BOOTMAPSZ + bootmap_base) - (ulong)fdt_blob;
800                 lmb_reserve(lmb, (ulong)fdt_blob, of_len);
801                 fdt_set_totalsize(*of_flat_tree, of_len);
802
803                 *of_size = of_len;
804         }
805
806         return 0;
807
808 error:
809         return 1;
810 }
811 #endif