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);
76 #if defined(CONFIG_OF_LIBFDT)
77 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 #if defined(CONFIG_OF_LIBFDT)
96 /* find flattened device tree */
97 get_fdt (cmdtp, flag, argc, argv, images, &of_flat_tree, &of_size);
101 /* allocate space and init command line */
102 alloc_current = get_boot_cmdline (alloc_current, &cmd_start, &cmd_end);
104 /* allocate space for kernel copy of board info */
105 alloc_current = get_boot_kbd (alloc_current, &kbd);
106 set_clocks_in_mhz(kbd);
109 /* find kernel entry point */
110 if (images->legacy_hdr_valid) {
111 ep = image_get_ep (images->legacy_hdr_os);
112 #if defined(CONFIG_FIT)
113 } else if (images->fit_uname_os) {
114 fit_unsupported_reset ("PPC linux bootm");
115 do_reset (cmdtp, flag, argc, argv);
118 puts ("Could not find kernel entry point!\n");
119 do_reset (cmdtp, flag, argc, argv);
121 kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))ep;
124 get_ramdisk (cmdtp, flag, argc, argv, images,
125 IH_ARCH_PPC, &rd_data_start, &rd_data_end);
127 rd_len = rd_data_end - rd_data_start;
129 alloc_current = ramdisk_high (alloc_current, rd_data_start, rd_len,
130 sp_limit, get_sp (), &initrd_start, &initrd_end);
132 #if defined(CONFIG_OF_LIBFDT)
133 alloc_current = fdt_relocate (alloc_current,
134 cmdtp, flag, argc, argv, &of_flat_tree, &of_size);
137 * Add the chosen node if it doesn't exist, add the env and bd_t
138 * if the user wants it (the logic is in the subroutines).
141 if (fdt_chosen(of_flat_tree, initrd_start, initrd_end, 0) < 0) {
142 fdt_error ("/chosen node create failed");
143 do_reset (cmdtp, flag, argc, argv);
145 #ifdef CONFIG_OF_HAS_UBOOT_ENV
146 if (fdt_env(of_flat_tree) < 0) {
147 fdt_error ("/u-boot-env node create failed");
148 do_reset (cmdtp, flag, argc, argv);
151 #ifdef CONFIG_OF_HAS_BD_T
152 if (fdt_bd_t(of_flat_tree) < 0) {
153 fdt_error ("/bd_t node create failed");
154 do_reset (cmdtp, flag, argc, argv);
157 #ifdef CONFIG_OF_BOARD_SETUP
158 /* Call the board-specific fixup routine */
159 ft_board_setup(of_flat_tree, gd->bd);
162 #endif /* CONFIG_OF_LIBFDT */
164 debug ("## Transferring control to Linux (at address %08lx) ...\n",
167 show_boot_progress (15);
169 #if defined(CFG_INIT_RAM_LOCK) && !defined(CONFIG_E500)
170 unlock_ram_in_cache();
173 #if defined(CONFIG_OF_LIBFDT)
174 if (of_flat_tree) { /* device tree; boot new style */
176 * Linux Kernel Parameters (passing device tree):
177 * r3: pointer to the fdt, followed by the board info data
178 * r4: physical pointer to the kernel itself
183 (*kernel) ((bd_t *)of_flat_tree, (ulong)kernel, 0, 0, 0);
184 /* does not return */
188 * Linux Kernel Parameters (passing board info data):
189 * r3: ptr to board info data
190 * r4: initrd_start or 0 if no initrd
191 * r5: initrd_end - unused if r4 is 0
192 * r6: Start of command line string
193 * r7: End of command line string
195 (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
196 /* does not return */
199 static ulong get_sp (void)
203 asm( "mr %0,1": "=r"(sp) : );
207 static void set_clocks_in_mhz (bd_t *kbd)
211 if ((s = getenv ("clocks_in_mhz")) != NULL) {
212 /* convert all clock information to MHz */
213 kbd->bi_intfreq /= 1000000L;
214 kbd->bi_busfreq /= 1000000L;
215 #if defined(CONFIG_MPC8220)
216 kbd->bi_inpfreq /= 1000000L;
217 kbd->bi_pcifreq /= 1000000L;
218 kbd->bi_pevfreq /= 1000000L;
219 kbd->bi_flbfreq /= 1000000L;
220 kbd->bi_vcofreq /= 1000000L;
222 #if defined(CONFIG_CPM2)
223 kbd->bi_cpmfreq /= 1000000L;
224 kbd->bi_brgfreq /= 1000000L;
225 kbd->bi_sccfreq /= 1000000L;
226 kbd->bi_vco /= 1000000L;
228 #if defined(CONFIG_MPC5xxx)
229 kbd->bi_ipbfreq /= 1000000L;
230 kbd->bi_pcifreq /= 1000000L;
231 #endif /* CONFIG_MPC5xxx */
235 #if defined(CONFIG_OF_LIBFDT)
236 static void fdt_error (const char *msg)
240 puts (" - must RESET the board to recover.\n");
243 static image_header_t *image_get_fdt (ulong fdt_addr)
245 image_header_t *fdt_hdr = (image_header_t *)fdt_addr;
247 image_print_contents (fdt_hdr);
249 puts (" Verifying Checksum ... ");
250 if (!image_check_hcrc (fdt_hdr)) {
251 fdt_error ("fdt header checksum invalid");
255 if (!image_check_dcrc (fdt_hdr)) {
256 fdt_error ("fdt checksum invalid");
261 if (!image_check_type (fdt_hdr, IH_TYPE_FLATDT)) {
262 fdt_error ("uImage is not a fdt");
265 if (image_get_comp (fdt_hdr) != IH_COMP_NONE) {
266 fdt_error ("uImage is compressed");
269 if (fdt_check_header ((char *)image_get_data (fdt_hdr)) != 0) {
270 fdt_error ("uImage data is not a fdt");
276 static void get_fdt (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
277 bootm_headers_t *images, char **of_flat_tree, ulong *of_size)
280 image_header_t *fdt_hdr;
281 char *fdt_blob = NULL;
282 ulong image_start, image_end;
283 ulong load_start, load_end;
284 #if defined(CONFIG_FIT)
286 const char *fit_uname_config = NULL;
287 const char *fit_uname_fdt = NULL;
292 #if defined(CONFIG_FIT)
294 * If the FDT blob comes from the FIT image and the FIT image
295 * address is omitted in the command line argument, try to use
296 * ramdisk or os FIT image address or default load address.
298 if (images->fit_uname_rd)
299 default_addr = (ulong)images->fit_hdr_rd;
300 else if (images->fit_uname_os)
301 default_addr = (ulong)images->fit_hdr_os;
303 default_addr = load_addr;
305 if (fit_parse_conf (argv[3], default_addr,
306 &fdt_addr, &fit_uname_config)) {
307 debug ("* fdt: config '%s' from image at 0x%08lx\n",
308 fit_uname_config, fdt_addr);
309 } else if (fit_parse_subimage (argv[3], default_addr,
310 &fdt_addr, &fit_uname_fdt)) {
311 debug ("* fdt: subimage '%s' from image at 0x%08lx\n",
312 fit_uname_fdt, fdt_addr);
316 fdt_addr = simple_strtoul(argv[3], NULL, 16);
317 debug ("* fdt: cmdline image address = 0x%08lx\n",
321 debug ("## Checking for 'FDT'/'FDT image' at %08lx\n",
324 /* copy from dataflash if needed */
325 fdt_addr = gen_get_image (fdt_addr);
328 * Check if there is an FDT image at the
329 * address provided in the second bootm argument
330 * check image type, for FIT images get a FIT node.
332 switch (gen_image_get_format ((void *)fdt_addr)) {
333 case IMAGE_FORMAT_LEGACY:
334 debug ("* fdt: legacy format image\n");
336 /* verify fdt_addr points to a valid image header */
337 printf ("## Flattened Device Tree Legacy Image at %08lx\n",
339 fdt_hdr = image_get_fdt (fdt_addr);
341 do_reset (cmdtp, flag, argc, argv);
344 * move image data to the load address,
345 * make sure we don't overwrite initial image
347 image_start = (ulong)fdt_hdr;
348 image_end = image_get_image_end (fdt_hdr);
350 load_start = image_get_load (fdt_hdr);
351 load_end = load_start + image_get_data_size (fdt_hdr);
353 if ((load_start < image_end) && (load_end > image_start)) {
354 fdt_error ("fdt overwritten");
355 do_reset (cmdtp, flag, argc, argv);
357 memmove ((void *)image_get_load (fdt_hdr),
358 (void *)image_get_data (fdt_hdr),
359 image_get_data_size (fdt_hdr));
361 fdt_blob = (char *)image_get_load (fdt_hdr);
363 case IMAGE_FORMAT_FIT:
365 * This case will catch both: new uImage format
366 * (libfdt based) and raw FDT blob (also libfdt
369 #if defined(CONFIG_FIT)
370 /* check FDT blob vs FIT blob */
371 if (0) { /* FIXME: call FIT format verification */
375 fit_hdr = (void *)fdt_addr;
376 debug ("* fdt: FIT format image\n");
377 fit_unsupported_reset ("PPC fdt");
378 do_reset (cmdtp, flag, argc, argv);
385 debug ("* fdt: raw FDT blob\n");
386 printf ("## Flattened Device Tree blob at %08lx\n", fdt_blob);
387 fdt_blob = (char *)fdt_addr;
391 fdt_error ("Did not find a cmdline Flattened Device Tree");
392 do_reset (cmdtp, flag, argc, argv);
395 printf (" Booting using the fdt blob at 0x%x\n", fdt_blob);
397 } else if (images->legacy_hdr_valid &&
398 image_check_type (images->legacy_hdr_os, IH_TYPE_MULTI)) {
400 ulong fdt_data, fdt_len;
403 * Now check if we have a legacy multi-component image,
404 * get second entry data start address and len.
406 printf ("## Flattened Device Tree from multi "
407 "component Image at %08lX\n",
408 (ulong)images->legacy_hdr_os);
410 image_multi_getimg (images->legacy_hdr_os, 2, &fdt_data, &fdt_len);
413 fdt_blob = (char *)fdt_data;
414 printf (" Booting using the fdt at 0x%x\n", fdt_blob);
416 if (fdt_check_header (fdt_blob) != 0) {
417 fdt_error ("image is not a fdt");
418 do_reset (cmdtp, flag, argc, argv);
421 if (be32_to_cpu (fdt_totalsize (fdt_blob)) != fdt_len) {
422 fdt_error ("fdt size != image size");
423 do_reset (cmdtp, flag, argc, argv);
426 fdt_error ("Did not find a Flattened Device Tree "
427 "in a legacy multi-component image");
428 do_reset (cmdtp, flag, argc, argv);
431 debug ("## No Flattened Device Tree\n");
432 *of_flat_tree = NULL;
437 *of_flat_tree = fdt_blob;
438 *of_size = be32_to_cpu (fdt_totalsize (fdt_blob));
439 debug (" of_flat_tree at 0x%08lx size 0x%08lx\n",
440 *of_flat_tree, *of_size);
443 static ulong fdt_relocate (ulong alloc_current,
444 cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
445 char **of_flat_tree, ulong *of_size)
447 char *fdt_blob = *of_flat_tree;
449 ulong new_alloc_current;
453 return alloc_current;
455 if (fdt_check_header (fdt_blob) != 0) {
456 fdt_error ("image is not a fdt");
457 do_reset (cmdtp, flag, argc, argv);
461 /* move the blob if it is in flash (set relocate) */
462 if (addr2info ((ulong)fdt_blob) != NULL)
468 * The blob must be within CFG_BOOTMAPSZ,
469 * so we flag it to be copied if it is not.
471 if (fdt_blob >= (char *)CFG_BOOTMAPSZ)
475 /* move flattend device tree if needed */
478 ulong of_start, of_len;
482 /* position on a 4K boundary before the alloc_current */
483 of_start = alloc_current - of_len;
484 of_start &= ~(4096 - 1); /* align on page */
486 debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
487 (ulong)fdt_blob, (ulong)fdt_blob + of_len - 1,
490 printf (" Loading Device Tree to %08lx, end %08lx ... ",
491 of_start, of_start + of_len - 1);
493 err = fdt_open_into (fdt_blob, (void *)of_start, of_len);
495 fdt_error ("fdt move failed");
496 do_reset (cmdtp, flag, argc, argv);
500 *of_flat_tree = (char *)of_start;
501 new_alloc_current = of_start;
503 *of_flat_tree = fdt_blob;
504 new_alloc_current = alloc_current;
507 return new_alloc_current;