2 * (C) Copyright 2008 Semihalf
4 * (C) Copyright 2000-2006
5 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
7 * See file CREDITS for list of people who contributed to this
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.
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.
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,
35 #include <environment.h>
36 #include <asm/byteorder.h>
38 #if defined(CONFIG_OF_LIBFDT)
41 #include <fdt_support.h>
43 static void fdt_error (const char *msg);
44 static int boot_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 boot_relocate_fdt (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);
51 #ifdef CFG_INIT_RAM_LOCK
52 #include <asm/cache.h>
55 DECLARE_GLOBAL_DATA_PTR;
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);
62 #ifndef CFG_LINUX_LOWMEM_MAX_SIZE
63 #define CFG_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
66 void __attribute__((noinline))
67 do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
68 bootm_headers_t *images)
72 ulong initrd_start, initrd_end;
73 ulong rd_data_start, rd_data_end, rd_len;
76 ulong cmd_start, cmd_end, bootmap_base;
79 void (*kernel)(bd_t *, ulong, ulong, ulong, ulong);
82 struct lmb *lmb = images->lmb;
84 #if defined(CONFIG_OF_LIBFDT)
85 char *of_flat_tree = NULL;
88 bootmap_base = getenv_bootm_low();
89 size = getenv_bootm_size();
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");
98 size = min(size, get_effective_memsize());
99 size = min(size, CFG_LINUX_LOWMEM_MAX_SIZE);
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);
108 * Booting a (Linux) kernel image
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
117 debug ("## Current stack ends at 0x%08lx\n", sp);
119 /* adjust sp by 1K to be safe */
121 lmb_reserve(lmb, sp, (CFG_SDRAM_BASE + get_effective_memsize() - sp));
123 #if defined(CONFIG_OF_LIBFDT)
124 /* find flattened device tree */
125 ret = boot_get_fdt (cmdtp, flag, argc, argv, images, &of_flat_tree, &of_size);
132 /* allocate space and init command line */
133 ret = boot_get_cmdline (lmb, &cmd_start, &cmd_end, bootmap_base);
135 puts("ERROR with allocation of cmdline\n");
139 /* allocate space for kernel copy of board info */
140 ret = boot_get_kbd (lmb, &kbd, bootmap_base);
142 puts("ERROR with allocation of kernel bd\n");
145 set_clocks_in_mhz(kbd);
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");
157 puts ("Could not find kernel entry point!\n");
160 kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))ep;
163 ret = boot_get_ramdisk (argc, argv, images, IH_ARCH_PPC,
164 &rd_data_start, &rd_data_end);
168 rd_len = rd_data_end - rd_data_start;
170 #if defined(CONFIG_OF_LIBFDT)
171 ret = boot_relocate_fdt (lmb, bootmap_base,
172 cmdtp, flag, argc, argv, &of_flat_tree, &of_size);
175 * Add the chosen node if it doesn't exist, add the env and bd_t
176 * if the user wants it (the logic is in the subroutines).
179 /* pass in dummy initrd info, we'll fix up later */
180 if (fdt_chosen(of_flat_tree, rd_data_start, rd_data_end, 0) < 0) {
181 fdt_error ("/chosen node create failed");
184 #ifdef CONFIG_OF_HAS_UBOOT_ENV
185 if (fdt_env(of_flat_tree) < 0) {
186 fdt_error ("/u-boot-env node create failed");
190 #ifdef CONFIG_OF_HAS_BD_T
191 if (fdt_bd_t(of_flat_tree) < 0) {
192 fdt_error ("/bd_t node create failed");
196 #ifdef CONFIG_OF_BOARD_SETUP
197 /* Call the board-specific fixup routine */
198 ft_board_setup(of_flat_tree, gd->bd);
201 #endif /* CONFIG_OF_LIBFDT */
203 ret = boot_ramdisk_high (lmb, rd_data_start, rd_len, &initrd_start, &initrd_end);
207 #if defined(CONFIG_OF_LIBFDT)
208 /* fixup the initrd now that we know where it should be */
209 if ((of_flat_tree) && (initrd_start && initrd_end)) {
211 int total = fdt_num_mem_rsv(of_flat_tree);
214 /* Look for the dummy entry and delete it */
215 for (j = 0; j < total; j++) {
216 fdt_get_mem_rsv(of_flat_tree, j, &addr, &size);
217 if (addr == rd_data_start) {
218 fdt_del_mem_rsv(of_flat_tree, j);
223 ret = fdt_add_mem_rsv(of_flat_tree, initrd_start,
224 initrd_end - initrd_start + 1);
226 printf("fdt_chosen: %s\n", fdt_strerror(ret));
230 do_fixup_by_path_u32(of_flat_tree, "/chosen",
231 "linux,initrd-start", initrd_start, 0);
232 do_fixup_by_path_u32(of_flat_tree, "/chosen",
233 "linux,initrd-end", initrd_end, 0);
236 debug ("## Transferring control to Linux (at address %08lx) ...\n",
239 show_boot_progress (15);
241 #if defined(CFG_INIT_RAM_LOCK) && !defined(CONFIG_E500)
242 unlock_ram_in_cache();
244 if (!images->autostart)
247 #if defined(CONFIG_OF_LIBFDT)
248 if (of_flat_tree) { /* device tree; boot new style */
250 * Linux Kernel Parameters (passing device tree):
251 * r3: pointer to the fdt, followed by the board info data
252 * r4: physical pointer to the kernel itself
257 (*kernel) ((bd_t *)of_flat_tree, (ulong)kernel, 0, 0, 0);
258 /* does not return */
262 * Linux Kernel Parameters (passing board info data):
263 * r3: ptr to board info data
264 * r4: initrd_start or 0 if no initrd
265 * r5: initrd_end - unused if r4 is 0
266 * r6: Start of command line string
267 * r7: End of command line string
269 (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
270 /* does not return */
274 if (images->autostart)
275 do_reset (cmdtp, flag, argc, argv);
279 static ulong get_sp (void)
283 asm( "mr %0,1": "=r"(sp) : );
287 static void set_clocks_in_mhz (bd_t *kbd)
291 if ((s = getenv ("clocks_in_mhz")) != NULL) {
292 /* convert all clock information to MHz */
293 kbd->bi_intfreq /= 1000000L;
294 kbd->bi_busfreq /= 1000000L;
295 #if defined(CONFIG_MPC8220)
296 kbd->bi_inpfreq /= 1000000L;
297 kbd->bi_pcifreq /= 1000000L;
298 kbd->bi_pevfreq /= 1000000L;
299 kbd->bi_flbfreq /= 1000000L;
300 kbd->bi_vcofreq /= 1000000L;
302 #if defined(CONFIG_CPM2)
303 kbd->bi_cpmfreq /= 1000000L;
304 kbd->bi_brgfreq /= 1000000L;
305 kbd->bi_sccfreq /= 1000000L;
306 kbd->bi_vco /= 1000000L;
308 #if defined(CONFIG_MPC5xxx)
309 kbd->bi_ipbfreq /= 1000000L;
310 kbd->bi_pcifreq /= 1000000L;
311 #endif /* CONFIG_MPC5xxx */
315 #if defined(CONFIG_OF_LIBFDT)
316 static void fdt_error (const char *msg)
320 puts (" - must RESET the board to recover.\n");
323 static image_header_t *image_get_fdt (ulong fdt_addr)
325 image_header_t *fdt_hdr = (image_header_t *)fdt_addr;
327 image_print_contents (fdt_hdr);
329 puts (" Verifying Checksum ... ");
330 if (!image_check_hcrc (fdt_hdr)) {
331 fdt_error ("fdt header checksum invalid");
335 if (!image_check_dcrc (fdt_hdr)) {
336 fdt_error ("fdt checksum invalid");
341 if (!image_check_type (fdt_hdr, IH_TYPE_FLATDT)) {
342 fdt_error ("uImage is not a fdt");
345 if (image_get_comp (fdt_hdr) != IH_COMP_NONE) {
346 fdt_error ("uImage is compressed");
349 if (fdt_check_header ((char *)image_get_data (fdt_hdr)) != 0) {
350 fdt_error ("uImage data is not a fdt");
356 static int boot_get_fdt (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
357 bootm_headers_t *images, char **of_flat_tree, ulong *of_size)
360 image_header_t *fdt_hdr;
361 char *fdt_blob = NULL;
362 ulong image_start, image_end;
363 ulong load_start, load_end;
364 #if defined(CONFIG_FIT)
366 const char *fit_uname_config = NULL;
367 const char *fit_uname_fdt = NULL;
372 #if defined(CONFIG_FIT)
374 * If the FDT blob comes from the FIT image and the FIT image
375 * address is omitted in the command line argument, try to use
376 * ramdisk or os FIT image address or default load address.
378 if (images->fit_uname_rd)
379 default_addr = (ulong)images->fit_hdr_rd;
380 else if (images->fit_uname_os)
381 default_addr = (ulong)images->fit_hdr_os;
383 default_addr = load_addr;
385 if (fit_parse_conf (argv[3], default_addr,
386 &fdt_addr, &fit_uname_config)) {
387 debug ("* fdt: config '%s' from image at 0x%08lx\n",
388 fit_uname_config, fdt_addr);
389 } else if (fit_parse_subimage (argv[3], default_addr,
390 &fdt_addr, &fit_uname_fdt)) {
391 debug ("* fdt: subimage '%s' from image at 0x%08lx\n",
392 fit_uname_fdt, fdt_addr);
396 fdt_addr = simple_strtoul(argv[3], NULL, 16);
397 debug ("* fdt: cmdline image address = 0x%08lx\n",
401 debug ("## Checking for 'FDT'/'FDT image' at %08lx\n",
404 /* copy from dataflash if needed */
405 fdt_addr = genimg_get_image (fdt_addr);
408 * Check if there is an FDT image at the
409 * address provided in the second bootm argument
410 * check image type, for FIT images get a FIT node.
412 switch (genimg_get_format ((void *)fdt_addr)) {
413 case IMAGE_FORMAT_LEGACY:
414 debug ("* fdt: legacy format image\n");
416 /* verify fdt_addr points to a valid image header */
417 printf ("## Flattened Device Tree Legacy Image at %08lx\n",
419 fdt_hdr = image_get_fdt (fdt_addr);
424 * move image data to the load address,
425 * make sure we don't overwrite initial image
427 image_start = (ulong)fdt_hdr;
428 image_end = image_get_image_end (fdt_hdr);
430 load_start = image_get_load (fdt_hdr);
431 load_end = load_start + image_get_data_size (fdt_hdr);
433 if ((load_start < image_end) && (load_end > image_start)) {
434 fdt_error ("fdt overwritten");
437 memmove ((void *)image_get_load (fdt_hdr),
438 (void *)image_get_data (fdt_hdr),
439 image_get_data_size (fdt_hdr));
441 fdt_blob = (char *)image_get_load (fdt_hdr);
443 case IMAGE_FORMAT_FIT:
445 * This case will catch both: new uImage format
446 * (libfdt based) and raw FDT blob (also libfdt
449 #if defined(CONFIG_FIT)
450 /* check FDT blob vs FIT blob */
451 if (0) { /* FIXME: call FIT format verification */
455 fit_hdr = (void *)fdt_addr;
456 debug ("* fdt: FIT format image\n");
457 fit_unsupported_reset ("PPC fdt");
465 debug ("* fdt: raw FDT blob\n");
466 printf ("## Flattened Device Tree blob at %08lx\n", fdt_blob);
467 fdt_blob = (char *)fdt_addr;
471 fdt_error ("Did not find a cmdline Flattened Device Tree");
475 printf (" Booting using the fdt blob at 0x%x\n", fdt_blob);
477 } else if (images->legacy_hdr_valid &&
478 image_check_type (images->legacy_hdr_os, IH_TYPE_MULTI)) {
480 ulong fdt_data, fdt_len;
483 * Now check if we have a legacy multi-component image,
484 * get second entry data start address and len.
486 printf ("## Flattened Device Tree from multi "
487 "component Image at %08lX\n",
488 (ulong)images->legacy_hdr_os);
490 image_multi_getimg (images->legacy_hdr_os, 2, &fdt_data, &fdt_len);
493 fdt_blob = (char *)fdt_data;
494 printf (" Booting using the fdt at 0x%x\n", fdt_blob);
496 if (fdt_check_header (fdt_blob) != 0) {
497 fdt_error ("image is not a fdt");
501 if (be32_to_cpu (fdt_totalsize (fdt_blob)) != fdt_len) {
502 fdt_error ("fdt size != image size");
506 fdt_error ("Did not find a Flattened Device Tree "
507 "in a legacy multi-component image");
511 debug ("## No Flattened Device Tree\n");
512 *of_flat_tree = NULL;
517 *of_flat_tree = fdt_blob;
518 *of_size = be32_to_cpu (fdt_totalsize (fdt_blob));
519 debug (" of_flat_tree at 0x%08lx size 0x%08lx\n",
520 *of_flat_tree, *of_size);
525 do_reset (cmdtp, flag, argc, argv);
529 static int boot_relocate_fdt (struct lmb *lmb, ulong bootmap_base,
530 cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
531 char **of_flat_tree, ulong *of_size)
533 char *fdt_blob = *of_flat_tree;
541 if (fdt_check_header (fdt_blob) != 0) {
542 fdt_error ("image is not a fdt");
547 /* move the blob if it is in flash (set relocate) */
548 if (addr2info ((ulong)fdt_blob) != NULL)
553 * The blob must be within CFG_BOOTMAPSZ,
554 * so we flag it to be copied if it is not.
556 if (fdt_blob >= (char *)CFG_BOOTMAPSZ)
559 of_len = be32_to_cpu (fdt_totalsize (fdt_blob));
561 /* move flattend device tree if needed */
566 /* position on a 4K boundary before the alloc_current */
567 of_start = lmb_alloc_base(lmb, of_len, 0x1000,
568 (CFG_BOOTMAPSZ + bootmap_base));
571 puts("device tree - allocation error\n");
575 debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
576 (ulong)fdt_blob, (ulong)fdt_blob + of_len - 1,
579 printf (" Loading Device Tree to %08lx, end %08lx ... ",
580 of_start, of_start + of_len - 1);
582 err = fdt_open_into (fdt_blob, (void *)of_start, of_len);
584 fdt_error ("fdt move failed");
589 *of_flat_tree = (char *)of_start;
591 *of_flat_tree = fdt_blob;
592 lmb_reserve(lmb, (ulong)fdt, of_len);