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 void 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 ulong fdt_relocate (ulong alloc_current,
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 static ulong get_sp (void);
59 static void set_clocks_in_mhz (bd_t *kbd);
61 void __attribute__((noinline))
62 do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
63 bootm_headers_t *images)
65 ulong sp, sp_limit, alloc_current;
67 ulong initrd_start, initrd_end;
68 ulong rd_data_start, rd_data_end, rd_len;
70 ulong cmd_start, cmd_end;
73 void (*kernel)(bd_t *, ulong, ulong, ulong, ulong);
75 #if defined(CONFIG_OF_LIBFDT)
76 char *of_flat_tree = NULL;
81 * Booting a (Linux) kernel image
83 * Allocate space for command line and board info - the
84 * address should be as high as possible within the reach of
85 * the kernel (see CFG_BOOTMAPSZ settings), but in unused
86 * memory, which means far enough below the current stack
90 debug ("## Current stack ends at 0x%08lx ", sp);
92 alloc_current = sp_limit = get_boot_sp_limit(sp);
93 debug ("=> set upper limit to 0x%08lx\n", sp_limit);
95 /* allocate space and init command line */
96 alloc_current = get_boot_cmdline (alloc_current, &cmd_start, &cmd_end);
98 /* allocate space for kernel copy of board info */
99 alloc_current = get_boot_kbd (alloc_current, &kbd);
100 set_clocks_in_mhz(kbd);
102 /* find kernel entry point */
103 if (images->legacy_hdr_valid) {
104 ep = image_get_ep (images->legacy_hdr_os);
105 #if defined(CONFIG_FIT)
106 } else if (images->fit_uname_os) {
107 fit_unsupported_reset ("PPC linux bootm");
108 do_reset (cmdtp, flag, argc, argv);
111 puts ("Could not find kernel entry point!\n");
112 do_reset (cmdtp, flag, argc, argv);
114 kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))ep;
117 get_ramdisk (cmdtp, flag, argc, argv, images,
118 IH_ARCH_PPC, &rd_data_start, &rd_data_end);
120 rd_len = rd_data_end - rd_data_start;
122 alloc_current = ramdisk_high (alloc_current, rd_data_start, rd_len,
123 sp_limit, get_sp (), &initrd_start, &initrd_end);
125 #if defined(CONFIG_OF_LIBFDT)
126 /* find flattened device tree */
127 get_fdt (cmdtp, flag, argc, argv, images, &of_flat_tree, &of_size);
129 alloc_current = fdt_relocate (alloc_current,
130 cmdtp, flag, argc, argv, &of_flat_tree, &of_size);
133 * Add the chosen node if it doesn't exist, add the env and bd_t
134 * if the user wants it (the logic is in the subroutines).
137 if (fdt_chosen(of_flat_tree, initrd_start, initrd_end, 0) < 0) {
138 fdt_error ("/chosen node create failed");
139 do_reset (cmdtp, flag, argc, argv);
141 #ifdef CONFIG_OF_HAS_UBOOT_ENV
142 if (fdt_env(of_flat_tree) < 0) {
143 fdt_error ("/u-boot-env node create failed");
144 do_reset (cmdtp, flag, argc, argv);
147 #ifdef CONFIG_OF_HAS_BD_T
148 if (fdt_bd_t(of_flat_tree) < 0) {
149 fdt_error ("/bd_t node create failed");
150 do_reset (cmdtp, flag, argc, argv);
153 #ifdef CONFIG_OF_BOARD_SETUP
154 /* Call the board-specific fixup routine */
155 ft_board_setup(of_flat_tree, gd->bd);
158 #endif /* CONFIG_OF_LIBFDT */
160 debug ("## Transferring control to Linux (at address %08lx) ...\n",
163 show_boot_progress (15);
165 #if defined(CFG_INIT_RAM_LOCK) && !defined(CONFIG_E500)
166 unlock_ram_in_cache();
169 #if defined(CONFIG_OF_LIBFDT)
170 if (of_flat_tree) { /* device tree; boot new style */
172 * Linux Kernel Parameters (passing device tree):
173 * r3: pointer to the fdt, followed by the board info data
174 * r4: physical pointer to the kernel itself
179 (*kernel) ((bd_t *)of_flat_tree, (ulong)kernel, 0, 0, 0);
180 /* does not return */
184 * Linux Kernel Parameters (passing board info data):
185 * r3: ptr to board info data
186 * r4: initrd_start or 0 if no initrd
187 * r5: initrd_end - unused if r4 is 0
188 * r6: Start of command line string
189 * r7: End of command line string
191 (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
192 /* does not return */
195 static ulong get_sp (void)
199 asm( "mr %0,1": "=r"(sp) : );
203 static void set_clocks_in_mhz (bd_t *kbd)
207 if ((s = getenv ("clocks_in_mhz")) != NULL) {
208 /* convert all clock information to MHz */
209 kbd->bi_intfreq /= 1000000L;
210 kbd->bi_busfreq /= 1000000L;
211 #if defined(CONFIG_MPC8220)
212 kbd->bi_inpfreq /= 1000000L;
213 kbd->bi_pcifreq /= 1000000L;
214 kbd->bi_pevfreq /= 1000000L;
215 kbd->bi_flbfreq /= 1000000L;
216 kbd->bi_vcofreq /= 1000000L;
218 #if defined(CONFIG_CPM2)
219 kbd->bi_cpmfreq /= 1000000L;
220 kbd->bi_brgfreq /= 1000000L;
221 kbd->bi_sccfreq /= 1000000L;
222 kbd->bi_vco /= 1000000L;
224 #if defined(CONFIG_MPC5xxx)
225 kbd->bi_ipbfreq /= 1000000L;
226 kbd->bi_pcifreq /= 1000000L;
227 #endif /* CONFIG_MPC5xxx */
231 #if defined(CONFIG_OF_LIBFDT)
232 static void fdt_error (const char *msg)
236 puts (" - must RESET the board to recover.\n");
239 static image_header_t *image_get_fdt (ulong fdt_addr)
241 image_header_t *fdt_hdr = (image_header_t *)fdt_addr;
243 image_print_contents (fdt_hdr);
245 puts (" Verifying Checksum ... ");
246 if (!image_check_hcrc (fdt_hdr)) {
247 fdt_error ("fdt header checksum invalid");
251 if (!image_check_dcrc (fdt_hdr)) {
252 fdt_error ("fdt checksum invalid");
257 if (!image_check_type (fdt_hdr, IH_TYPE_FLATDT)) {
258 fdt_error ("uImage is not a fdt");
261 if (image_get_comp (fdt_hdr) != IH_COMP_NONE) {
262 fdt_error ("uImage is compressed");
265 if (fdt_check_header ((char *)image_get_data (fdt_hdr)) != 0) {
266 fdt_error ("uImage data is not a fdt");
272 static void get_fdt (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
273 bootm_headers_t *images, char **of_flat_tree, ulong *of_size)
276 image_header_t *fdt_hdr;
277 char *fdt_blob = NULL;
278 ulong image_start, image_end;
279 ulong load_start, load_end;
280 #if defined(CONFIG_FIT)
282 const char *fit_uname_config = NULL;
283 const char *fit_uname_fdt = NULL;
288 #if defined(CONFIG_FIT)
290 * If the FDT blob comes from the FIT image and the FIT image
291 * address is omitted in the command line argument, try to use
292 * ramdisk or os FIT image address or default load address.
294 if (images->fit_uname_rd)
295 default_addr = (ulong)images->fit_hdr_rd;
296 else if (images->fit_uname_os)
297 default_addr = (ulong)images->fit_hdr_os;
299 default_addr = load_addr;
301 if (fit_parse_conf (argv[3], default_addr,
302 &fdt_addr, &fit_uname_config)) {
303 debug ("* fdt: config '%s' from image at 0x%08lx\n",
304 fit_uname_config, fdt_addr);
305 } else if (fit_parse_subimage (argv[3], default_addr,
306 &fdt_addr, &fit_uname_fdt)) {
307 debug ("* fdt: subimage '%s' from image at 0x%08lx\n",
308 fit_uname_fdt, fdt_addr);
312 fdt_addr = simple_strtoul(argv[3], NULL, 16);
313 debug ("* fdt: cmdline image address = 0x%08lx\n",
317 debug ("## Checking for 'FDT'/'FDT image' at %08lx\n",
320 /* copy from dataflash if needed */
321 fdt_addr = gen_get_image (fdt_addr);
324 * Check if there is an FDT image at the
325 * address provided in the second bootm argument
326 * check image type, for FIT images get a FIT node.
328 switch (gen_image_get_format ((void *)fdt_addr)) {
329 case IMAGE_FORMAT_LEGACY:
330 debug ("* fdt: legacy format image\n");
332 /* verify fdt_addr points to a valid image header */
333 printf ("## Flattened Device Tree Legacy Image at %08lx\n",
335 fdt_hdr = image_get_fdt (fdt_addr);
337 do_reset (cmdtp, flag, argc, argv);
340 * move image data to the load address,
341 * make sure we don't overwrite initial image
343 image_start = (ulong)fdt_hdr;
344 image_end = image_get_image_end (fdt_hdr);
346 load_start = image_get_load (fdt_hdr);
347 load_end = load_start + image_get_data_size (fdt_hdr);
349 if ((load_start < image_end) && (load_end > image_start)) {
350 fdt_error ("fdt overwritten");
351 do_reset (cmdtp, flag, argc, argv);
353 memmove ((void *)image_get_load (fdt_hdr),
354 (void *)image_get_data (fdt_hdr),
355 image_get_data_size (fdt_hdr));
357 fdt_blob = (char *)image_get_load (fdt_hdr);
359 case IMAGE_FORMAT_FIT:
361 * This case will catch both: new uImage format
362 * (libfdt based) and raw FDT blob (also libfdt
365 #if defined(CONFIG_FIT)
366 /* check FDT blob vs FIT blob */
367 if (0) { /* FIXME: call FIT format verification */
371 fit_hdr = (void *)fdt_addr;
372 debug ("* fdt: FIT format image\n");
373 fit_unsupported_reset ("PPC fdt");
374 do_reset (cmdtp, flag, argc, argv);
381 debug ("* fdt: raw FDT blob\n");
382 printf ("## Flattened Device Tree blob at %08lx\n", fdt_blob);
383 fdt_blob = (char *)fdt_addr;
387 fdt_error ("Did not find a cmdline Flattened Device Tree");
388 do_reset (cmdtp, flag, argc, argv);
391 printf (" Booting using the fdt blob at 0x%x\n", fdt_blob);
393 } else if (images->legacy_hdr_valid &&
394 image_check_type (images->legacy_hdr_os, IH_TYPE_MULTI)) {
396 ulong fdt_data, fdt_len;
399 * Now check if we have a legacy multi-component image,
400 * get second entry data start address and len.
402 printf ("## Flattened Device Tree from multi "
403 "component Image at %08lX\n",
404 (ulong)images->legacy_hdr_os);
406 image_multi_getimg (images->legacy_hdr_os, 2, &fdt_data, &fdt_len);
409 fdt_blob = (char *)fdt_data;
410 printf (" Booting using the fdt at 0x%x\n", fdt_blob);
412 if (fdt_check_header (fdt_blob) != 0) {
413 fdt_error ("image is not a fdt");
414 do_reset (cmdtp, flag, argc, argv);
417 if (be32_to_cpu (fdt_totalsize (fdt_blob)) != fdt_len) {
418 fdt_error ("fdt size != image size");
419 do_reset (cmdtp, flag, argc, argv);
422 fdt_error ("Did not find a Flattened Device Tree "
423 "in a legacy multi-component image");
424 do_reset (cmdtp, flag, argc, argv);
427 debug ("## No Flattened Device Tree\n");
428 *of_flat_tree = NULL;
433 *of_flat_tree = fdt_blob;
434 *of_size = be32_to_cpu (fdt_totalsize (fdt_blob));
435 debug (" of_flat_tree at 0x%08lx size 0x%08lx\n",
436 *of_flat_tree, *of_size);
439 static ulong fdt_relocate (ulong alloc_current,
440 cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
441 char **of_flat_tree, ulong *of_size)
443 char *fdt_blob = *of_flat_tree;
445 ulong new_alloc_current;
449 return alloc_current;
451 if (fdt_check_header (fdt_blob) != 0) {
452 fdt_error ("image is not a fdt");
453 do_reset (cmdtp, flag, argc, argv);
457 /* move the blob if it is in flash (set relocate) */
458 if (addr2info ((ulong)fdt_blob) != NULL)
464 * The blob must be within CFG_BOOTMAPSZ,
465 * so we flag it to be copied if it is not.
467 if (fdt_blob >= (char *)CFG_BOOTMAPSZ)
471 /* move flattend device tree if needed */
474 ulong of_start, of_len;
478 /* position on a 4K boundary before the alloc_current */
479 of_start = alloc_current - of_len;
480 of_start &= ~(4096 - 1); /* align on page */
482 debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
483 (ulong)fdt_blob, (ulong)fdt_blob + of_len - 1,
486 printf (" Loading Device Tree to %08lx, end %08lx ... ",
487 of_start, of_start + of_len - 1);
489 err = fdt_open_into (fdt_blob, (void *)of_start, of_len);
491 fdt_error ("fdt move failed");
492 do_reset (cmdtp, flag, argc, argv);
496 *of_flat_tree = (char *)of_start;
497 new_alloc_current = of_start;
499 *of_flat_tree = fdt_blob;
500 new_alloc_current = alloc_current;
503 return new_alloc_current;