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[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 #define DEBUG
27
28 #include <common.h>
29 #include <watchdog.h>
30 #include <command.h>
31 #include <image.h>
32 #include <malloc.h>
33 #include <zlib.h>
34 #include <bzlib.h>
35 #include <environment.h>
36 #include <asm/byteorder.h>
37
38 #if defined(CONFIG_OF_LIBFDT)
39 #include <fdt.h>
40 #include <libfdt.h>
41 #include <fdt_support.h>
42
43 static void fdt_error (const char *msg);
44 static int get_fdt (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
45 bootm_headers_t *images, char **of_flat_tree, ulong *of_size);
46 static int fdt_relocate (struct lmb *lmb, ulong bootmap_base,
47 cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
48 char **of_flat_tree, ulong *of_size);
49 #endif
50
51 #ifdef CFG_INIT_RAM_LOCK
52 #include <asm/cache.h>
53 #endif
54
55 DECLARE_GLOBAL_DATA_PTR;
56
57 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
58 extern ulong get_effective_memsize(void);
59 static ulong get_sp (void);
60 static void set_clocks_in_mhz (bd_t *kbd);
61
62 #ifndef CFG_LINUX_LOWMEM_MAX_SIZE
63 #define CFG_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
64 #endif
65
66 void __attribute__((noinline))
67 do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
68 bootm_headers_t *images)
69 {
70 ulong sp;
71
72 ulong initrd_start, initrd_end;
73 ulong rd_data_start, rd_data_end, rd_len;
74 ulong size;
75
76 ulong cmd_start, cmd_end, bootmap_base;
77 bd_t *kbd;
78 ulong ep = 0;
79 void (*kernel)(bd_t *, ulong, ulong, ulong, ulong);
80 int ret;
81 ulong of_size = 0;
82 struct lmb *lmb = images->lmb;
83
84 #if defined(CONFIG_OF_LIBFDT)
85 char *of_flat_tree = NULL;
86 #endif
87
88 bootmap_base = getenv_bootm_low();
89 size = getenv_bootm_size();
90
91 #ifdef DEBUG
92 if (((u64)bootmap_base + size) > (CFG_SDRAM_BASE + (u64)gd->ram_size))
93 puts("WARNING: bootm_low + bootm_size exceed total memory\n");
94 if ((bootmap_base + size) > get_effective_memsize())
95 puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
96 #endif
97
98 size = min(size, get_effective_memsize());
99 size = min(size, CFG_LINUX_LOWMEM_MAX_SIZE);
100
101 if (size < getenv_bootm_size()) {
102 ulong base = bootmap_base + size;
103 printf("WARNING: adjusting available memory to %x\n", size);
104 lmb_reserve(lmb, base, getenv_bootm_size() - size);
105 }
106
107 /*
108 * Booting a (Linux) kernel image
109 *
110 * Allocate space for command line and board info - the
111 * address should be as high as possible within the reach of
112 * the kernel (see CFG_BOOTMAPSZ settings), but in unused
113 * memory, which means far enough below the current stack
114 * pointer.
115 */
116 sp = get_sp();
117 debug ("## Current stack ends at 0x%08lx\n", sp);
118
119 /* adjust sp by 1K to be safe */
120 sp -= 1024;
121 lmb_reserve(lmb, sp, (CFG_SDRAM_BASE + get_effective_memsize() - sp));
122
123 #if defined(CONFIG_OF_LIBFDT)
124 /* find flattened device tree */
125 ret = get_fdt (cmdtp, flag, argc, argv, images, &of_flat_tree, &of_size);
126
127 if (ret)
128 goto error;
129 #endif
130
131 if (!of_size) {
132 /* allocate space and init command line */
133 ret = get_boot_cmdline (lmb, &cmd_start, &cmd_end, bootmap_base);
134 if (ret) {
135 puts("ERROR with allocation of cmdline\n");
136 goto error;
137 }
138
139 /* allocate space for kernel copy of board info */
140 ret = get_boot_kbd (lmb, &kbd, bootmap_base);
141 if (ret) {
142 puts("ERROR with allocation of kernel bd\n");
143 goto error;
144 }
145 set_clocks_in_mhz(kbd);
146 }
147
148 /* find kernel entry point */
149 if (images->legacy_hdr_valid) {
150 ep = image_get_ep (images->legacy_hdr_os);
151 #if defined(CONFIG_FIT)
152 } else if (images->fit_uname_os) {
153 fit_unsupported_reset ("PPC linux bootm");
154 goto error;
155 #endif
156 } else {
157 puts ("Could not find kernel entry point!\n");
158 goto error;
159 }
160 kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))ep;
161
162 /* find ramdisk */
163 ret = get_ramdisk (cmdtp, flag, argc, argv, images,
164 IH_ARCH_PPC, &rd_data_start, &rd_data_end);
165
166 if (ret)
167 goto error;
168
169 rd_len = rd_data_end - rd_data_start;
170
171 #if defined(CONFIG_OF_LIBFDT)
172 ret = fdt_relocate (lmb, bootmap_base,
173 cmdtp, flag, argc, argv, &of_flat_tree, &of_size);
174
175 /*
176 * Add the chosen node if it doesn't exist, add the env and bd_t
177 * if the user wants it (the logic is in the subroutines).
178 */
179 if (of_size) {
180 /* pass in dummy initrd info, we'll fix up later */
181 if (fdt_chosen(of_flat_tree, rd_data_start, rd_data_end, 0) < 0) {
182 fdt_error ("/chosen node create failed");
183 goto error;
184 }
185 #ifdef CONFIG_OF_HAS_UBOOT_ENV
186 if (fdt_env(of_flat_tree) < 0) {
187 fdt_error ("/u-boot-env node create failed");
188 goto error;
189 }
190 #endif
191 #ifdef CONFIG_OF_HAS_BD_T
192 if (fdt_bd_t(of_flat_tree) < 0) {
193 fdt_error ("/bd_t node create failed");
194 goto error;
195 }
196 #endif
197 #ifdef CONFIG_OF_BOARD_SETUP
198 /* Call the board-specific fixup routine */
199 ft_board_setup(of_flat_tree, gd->bd);
200 #endif
201 }
202 #endif /* CONFIG_OF_LIBFDT */
203
204 ret = ramdisk_high (lmb, rd_data_start, rd_len, &initrd_start, &initrd_end);
205 if (ret)
206 goto error;
207
208 #if defined(CONFIG_OF_LIBFDT)
209 /* fixup the initrd now that we know where it should be */
210 if ((of_flat_tree) && (initrd_start && initrd_end)) {
211 uint64_t addr, size;
212 int total = fdt_num_mem_rsv(of_flat_tree);
213 int j;
214
215 /* Look for the dummy entry and delete it */
216 for (j = 0; j < total; j++) {
217 fdt_get_mem_rsv(of_flat_tree, j, &addr, &size);
218 if (addr == rd_data_start) {
219 fdt_del_mem_rsv(of_flat_tree, j);
220 break;
221 }
222 }
223
224 ret = fdt_add_mem_rsv(of_flat_tree, initrd_start,
225 initrd_end - initrd_start + 1);
226 if (ret < 0) {
227 printf("fdt_chosen: %s\n", fdt_strerror(ret));
228 goto error;
229 }
230
231 do_fixup_by_path_u32(of_flat_tree, "/chosen",
232 "linux,initrd-start", initrd_start, 0);
233 do_fixup_by_path_u32(of_flat_tree, "/chosen",
234 "linux,initrd-end", initrd_end, 0);
235 }
236 #endif
237 debug ("## Transferring control to Linux (at address %08lx) ...\n",
238 (ulong)kernel);
239
240 show_boot_progress (15);
241
242 #if defined(CFG_INIT_RAM_LOCK) && !defined(CONFIG_E500)
243 unlock_ram_in_cache();
244 #endif
245
246 #if defined(CONFIG_OF_LIBFDT)
247 if (of_flat_tree) { /* device tree; boot new style */
248 /*
249 * Linux Kernel Parameters (passing device tree):
250 * r3: pointer to the fdt, followed by the board info data
251 * r4: physical pointer to the kernel itself
252 * r5: NULL
253 * r6: NULL
254 * r7: NULL
255 */
256 (*kernel) ((bd_t *)of_flat_tree, (ulong)kernel, 0, 0, 0);
257 /* does not return */
258 }
259 #endif
260 /*
261 * Linux Kernel Parameters (passing board info data):
262 * r3: ptr to board info data
263 * r4: initrd_start or 0 if no initrd
264 * r5: initrd_end - unused if r4 is 0
265 * r6: Start of command line string
266 * r7: End of command line string
267 */
268 (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
269 /* does not return */
270 return ;
271
272 error:
273 do_reset (cmdtp, flag, argc, argv);
274 return ;
275 }
276
277 static ulong get_sp (void)
278 {
279 ulong sp;
280
281 asm( "mr %0,1": "=r"(sp) : );
282 return sp;
283 }
284
285 static void set_clocks_in_mhz (bd_t *kbd)
286 {
287 char *s;
288
289 if ((s = getenv ("clocks_in_mhz")) != NULL) {
290 /* convert all clock information to MHz */
291 kbd->bi_intfreq /= 1000000L;
292 kbd->bi_busfreq /= 1000000L;
293 #if defined(CONFIG_MPC8220)
294 kbd->bi_inpfreq /= 1000000L;
295 kbd->bi_pcifreq /= 1000000L;
296 kbd->bi_pevfreq /= 1000000L;
297 kbd->bi_flbfreq /= 1000000L;
298 kbd->bi_vcofreq /= 1000000L;
299 #endif
300 #if defined(CONFIG_CPM2)
301 kbd->bi_cpmfreq /= 1000000L;
302 kbd->bi_brgfreq /= 1000000L;
303 kbd->bi_sccfreq /= 1000000L;
304 kbd->bi_vco /= 1000000L;
305 #endif
306 #if defined(CONFIG_MPC5xxx)
307 kbd->bi_ipbfreq /= 1000000L;
308 kbd->bi_pcifreq /= 1000000L;
309 #endif /* CONFIG_MPC5xxx */
310 }
311 }
312
313 #if defined(CONFIG_OF_LIBFDT)
314 static void fdt_error (const char *msg)
315 {
316 puts ("ERROR: ");
317 puts (msg);
318 puts (" - must RESET the board to recover.\n");
319 }
320
321 static image_header_t *image_get_fdt (ulong fdt_addr)
322 {
323 image_header_t *fdt_hdr = (image_header_t *)fdt_addr;
324
325 image_print_contents (fdt_hdr);
326
327 puts (" Verifying Checksum ... ");
328 if (!image_check_hcrc (fdt_hdr)) {
329 fdt_error ("fdt header checksum invalid");
330 return NULL;
331 }
332
333 if (!image_check_dcrc (fdt_hdr)) {
334 fdt_error ("fdt checksum invalid");
335 return NULL;
336 }
337 puts ("OK\n");
338
339 if (!image_check_type (fdt_hdr, IH_TYPE_FLATDT)) {
340 fdt_error ("uImage is not a fdt");
341 return NULL;
342 }
343 if (image_get_comp (fdt_hdr) != IH_COMP_NONE) {
344 fdt_error ("uImage is compressed");
345 return NULL;
346 }
347 if (fdt_check_header ((char *)image_get_data (fdt_hdr)) != 0) {
348 fdt_error ("uImage data is not a fdt");
349 return NULL;
350 }
351 return fdt_hdr;
352 }
353
354 static int get_fdt (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
355 bootm_headers_t *images, char **of_flat_tree, ulong *of_size)
356 {
357 ulong fdt_addr;
358 image_header_t *fdt_hdr;
359 char *fdt_blob = NULL;
360 ulong image_start, image_end;
361 ulong load_start, load_end;
362 #if defined(CONFIG_FIT)
363 void *fit_hdr;
364 const char *fit_uname_config = NULL;
365 const char *fit_uname_fdt = NULL;
366 ulong default_addr;
367 #endif
368
369 if (argc > 3) {
370 #if defined(CONFIG_FIT)
371 /*
372 * If the FDT blob comes from the FIT image and the FIT image
373 * address is omitted in the command line argument, try to use
374 * ramdisk or os FIT image address or default load address.
375 */
376 if (images->fit_uname_rd)
377 default_addr = (ulong)images->fit_hdr_rd;
378 else if (images->fit_uname_os)
379 default_addr = (ulong)images->fit_hdr_os;
380 else
381 default_addr = load_addr;
382
383 if (fit_parse_conf (argv[3], default_addr,
384 &fdt_addr, &fit_uname_config)) {
385 debug ("* fdt: config '%s' from image at 0x%08lx\n",
386 fit_uname_config, fdt_addr);
387 } else if (fit_parse_subimage (argv[3], default_addr,
388 &fdt_addr, &fit_uname_fdt)) {
389 debug ("* fdt: subimage '%s' from image at 0x%08lx\n",
390 fit_uname_fdt, fdt_addr);
391 } else
392 #endif
393 {
394 fdt_addr = simple_strtoul(argv[3], NULL, 16);
395 debug ("* fdt: cmdline image address = 0x%08lx\n",
396 fdt_addr);
397 }
398
399 debug ("## Checking for 'FDT'/'FDT image' at %08lx\n",
400 fdt_addr);
401
402 /* copy from dataflash if needed */
403 fdt_addr = gen_get_image (fdt_addr);
404
405 /*
406 * Check if there is an FDT image at the
407 * address provided in the second bootm argument
408 * check image type, for FIT images get a FIT node.
409 */
410 switch (gen_image_get_format ((void *)fdt_addr)) {
411 case IMAGE_FORMAT_LEGACY:
412 debug ("* fdt: legacy format image\n");
413
414 /* verify fdt_addr points to a valid image header */
415 printf ("## Flattened Device Tree Legacy Image at %08lx\n",
416 fdt_addr);
417 fdt_hdr = image_get_fdt (fdt_addr);
418 if (!fdt_hdr)
419 goto error;
420
421 /*
422 * move image data to the load address,
423 * make sure we don't overwrite initial image
424 */
425 image_start = (ulong)fdt_hdr;
426 image_end = image_get_image_end (fdt_hdr);
427
428 load_start = image_get_load (fdt_hdr);
429 load_end = load_start + image_get_data_size (fdt_hdr);
430
431 if ((load_start < image_end) && (load_end > image_start)) {
432 fdt_error ("fdt overwritten");
433 goto error;
434 }
435 memmove ((void *)image_get_load (fdt_hdr),
436 (void *)image_get_data (fdt_hdr),
437 image_get_data_size (fdt_hdr));
438
439 fdt_blob = (char *)image_get_load (fdt_hdr);
440 break;
441 case IMAGE_FORMAT_FIT:
442 /*
443 * This case will catch both: new uImage format
444 * (libfdt based) and raw FDT blob (also libfdt
445 * based).
446 */
447 #if defined(CONFIG_FIT)
448 /* check FDT blob vs FIT blob */
449 if (0) { /* FIXME: call FIT format verification */
450 /*
451 * FIT image
452 */
453 fit_hdr = (void *)fdt_addr;
454 debug ("* fdt: FIT format image\n");
455 fit_unsupported_reset ("PPC fdt");
456 goto error;
457 } else
458 #endif
459 {
460 /*
461 * FDT blob
462 */
463 debug ("* fdt: raw FDT blob\n");
464 printf ("## Flattened Device Tree blob at %08lx\n", fdt_blob);
465 fdt_blob = (char *)fdt_addr;
466 }
467 break;
468 default:
469 fdt_error ("Did not find a cmdline Flattened Device Tree");
470 goto error;
471 }
472
473 printf (" Booting using the fdt blob at 0x%x\n", fdt_blob);
474
475 } else if (images->legacy_hdr_valid &&
476 image_check_type (images->legacy_hdr_os, IH_TYPE_MULTI)) {
477
478 ulong fdt_data, fdt_len;
479
480 /*
481 * Now check if we have a legacy multi-component image,
482 * get second entry data start address and len.
483 */
484 printf ("## Flattened Device Tree from multi "
485 "component Image at %08lX\n",
486 (ulong)images->legacy_hdr_os);
487
488 image_multi_getimg (images->legacy_hdr_os, 2, &fdt_data, &fdt_len);
489 if (fdt_len) {
490
491 fdt_blob = (char *)fdt_data;
492 printf (" Booting using the fdt at 0x%x\n", fdt_blob);
493
494 if (fdt_check_header (fdt_blob) != 0) {
495 fdt_error ("image is not a fdt");
496 goto error;
497 }
498
499 if (be32_to_cpu (fdt_totalsize (fdt_blob)) != fdt_len) {
500 fdt_error ("fdt size != image size");
501 goto error;
502 }
503 } else {
504 fdt_error ("Did not find a Flattened Device Tree "
505 "in a legacy multi-component image");
506 goto error;
507 }
508 } else {
509 debug ("## No Flattened Device Tree\n");
510 *of_flat_tree = NULL;
511 *of_size = 0;
512 return 0;
513 }
514
515 *of_flat_tree = fdt_blob;
516 *of_size = be32_to_cpu (fdt_totalsize (fdt_blob));
517 debug (" of_flat_tree at 0x%08lx size 0x%08lx\n",
518 *of_flat_tree, *of_size);
519
520 return 0;
521
522 error:
523 do_reset (cmdtp, flag, argc, argv);
524 return 1;
525 }
526
527 static int fdt_relocate (struct lmb *lmb, ulong bootmap_base,
528 cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
529 char **of_flat_tree, ulong *of_size)
530 {
531 char *fdt_blob = *of_flat_tree;
532 ulong relocate = 0;
533 ulong of_len = 0;
534
535 /* nothing to do */
536 if (*of_size == 0)
537 return 0;
538
539 if (fdt_check_header (fdt_blob) != 0) {
540 fdt_error ("image is not a fdt");
541 goto error;
542 }
543
544 #ifndef CFG_NO_FLASH
545 /* move the blob if it is in flash (set relocate) */
546 if (addr2info ((ulong)fdt_blob) != NULL)
547 relocate = 1;
548 #endif
549
550 /*
551 * The blob must be within CFG_BOOTMAPSZ,
552 * so we flag it to be copied if it is not.
553 */
554 if (fdt_blob >= (char *)CFG_BOOTMAPSZ)
555 relocate = 1;
556
557 of_len = be32_to_cpu (fdt_totalsize (fdt));
558
559 /* move flattend device tree if needed */
560 if (relocate) {
561 int err;
562 ulong of_start;
563
564 /* position on a 4K boundary before the alloc_current */
565 of_start = lmb_alloc_base(lmb, of_len, 0x1000,
566 (CFG_BOOTMAPSZ + bootmap_base));
567
568 if (of_start == 0) {
569 puts("device tree - allocation error\n");
570 goto error;
571 }
572
573 debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
574 (ulong)fdt_blob, (ulong)fdt_blob + of_len - 1,
575 of_len, of_len);
576
577 printf (" Loading Device Tree to %08lx, end %08lx ... ",
578 of_start, of_start + of_len - 1);
579
580 err = fdt_open_into (fdt_blob, (void *)of_start, of_len);
581 if (err != 0) {
582 fdt_error ("fdt move failed");
583 goto error;
584 }
585 puts ("OK\n");
586
587 *of_flat_tree = (char *)of_start;
588 } else {
589 *of_flat_tree = fdt_blob;
590 lmb_reserve(lmb, (ulong)fdt, of_len);
591 }
592
593 return 0;
594
595 error:
596 return 1;
597 }
598 #endif
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