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 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);
77 #if defined(CONFIG_OF_LIBFDT)
78 char *of_flat_tree = NULL;
82 * Booting a (Linux) kernel image
84 * Allocate space for command line and board info - the
85 * address should be as high as possible within the reach of
86 * the kernel (see CFG_BOOTMAPSZ settings), but in unused
87 * memory, which means far enough below the current stack
91 debug ("## Current stack ends at 0x%08lx ", sp);
93 alloc_current = sp_limit = get_boot_sp_limit(sp);
94 debug ("=> set upper limit to 0x%08lx\n", sp_limit);
96 #if defined(CONFIG_OF_LIBFDT)
97 /* find flattened device tree */
98 ret = get_fdt (cmdtp, flag, argc, argv, images, &of_flat_tree, &of_size);
105 /* allocate space and init command line */
106 alloc_current = get_boot_cmdline (alloc_current, &cmd_start, &cmd_end);
108 /* allocate space for kernel copy of board info */
109 alloc_current = get_boot_kbd (alloc_current, &kbd);
110 set_clocks_in_mhz(kbd);
113 /* find kernel entry point */
114 if (images->legacy_hdr_valid) {
115 ep = image_get_ep (images->legacy_hdr_os);
116 #if defined(CONFIG_FIT)
117 } else if (images->fit_uname_os) {
118 fit_unsupported_reset ("PPC linux bootm");
122 puts ("Could not find kernel entry point!\n");
125 kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))ep;
128 ret = get_ramdisk (cmdtp, flag, argc, argv, images,
129 IH_ARCH_PPC, &rd_data_start, &rd_data_end);
134 rd_len = rd_data_end - rd_data_start;
136 #if defined(CONFIG_OF_LIBFDT)
137 alloc_current = fdt_relocate (alloc_current,
138 cmdtp, flag, argc, argv, &of_flat_tree, &of_size);
141 * Add the chosen node if it doesn't exist, add the env and bd_t
142 * if the user wants it (the logic is in the subroutines).
145 /* pass in dummy initrd info, we'll fix up later */
146 if (fdt_chosen(of_flat_tree, rd_data_start, rd_data_end, 0) < 0) {
147 fdt_error ("/chosen node create failed");
150 #ifdef CONFIG_OF_HAS_UBOOT_ENV
151 if (fdt_env(of_flat_tree) < 0) {
152 fdt_error ("/u-boot-env node create failed");
156 #ifdef CONFIG_OF_HAS_BD_T
157 if (fdt_bd_t(of_flat_tree) < 0) {
158 fdt_error ("/bd_t node create failed");
162 #ifdef CONFIG_OF_BOARD_SETUP
163 /* Call the board-specific fixup routine */
164 ft_board_setup(of_flat_tree, gd->bd);
167 #endif /* CONFIG_OF_LIBFDT */
169 alloc_current = ramdisk_high (alloc_current, rd_data_start, rd_len,
170 sp_limit, get_sp (), &initrd_start, &initrd_end);
172 #if defined(CONFIG_OF_LIBFDT)
173 /* fixup the initrd now that we know where it should be */
174 if ((of_flat_tree) && (initrd_start && initrd_end)) {
176 int total = fdt_num_mem_rsv(of_flat_tree);
179 /* Look for the dummy entry and delete it */
180 for (j = 0; j < total; j++) {
181 fdt_get_mem_rsv(of_flat_tree, j, &addr, &size);
182 if (addr == rd_data_start) {
183 fdt_del_mem_rsv(of_flat_tree, j);
188 ret = fdt_add_mem_rsv(of_flat_tree, initrd_start,
189 initrd_end - initrd_start + 1);
191 printf("fdt_chosen: %s\n", fdt_strerror(ret));
195 do_fixup_by_path_u32(of_flat_tree, "/chosen",
196 "linux,initrd-start", initrd_start, 0);
197 do_fixup_by_path_u32(of_flat_tree, "/chosen",
198 "linux,initrd-end", initrd_end, 0);
201 debug ("## Transferring control to Linux (at address %08lx) ...\n",
204 show_boot_progress (15);
206 #if defined(CFG_INIT_RAM_LOCK) && !defined(CONFIG_E500)
207 unlock_ram_in_cache();
210 #if defined(CONFIG_OF_LIBFDT)
211 if (of_flat_tree) { /* device tree; boot new style */
213 * Linux Kernel Parameters (passing device tree):
214 * r3: pointer to the fdt, followed by the board info data
215 * r4: physical pointer to the kernel itself
220 (*kernel) ((bd_t *)of_flat_tree, (ulong)kernel, 0, 0, 0);
221 /* does not return */
225 * Linux Kernel Parameters (passing board info data):
226 * r3: ptr to board info data
227 * r4: initrd_start or 0 if no initrd
228 * r5: initrd_end - unused if r4 is 0
229 * r6: Start of command line string
230 * r7: End of command line string
232 (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
233 /* does not return */
237 do_reset (cmdtp, flag, argc, argv);
241 static ulong get_sp (void)
245 asm( "mr %0,1": "=r"(sp) : );
249 static void set_clocks_in_mhz (bd_t *kbd)
253 if ((s = getenv ("clocks_in_mhz")) != NULL) {
254 /* convert all clock information to MHz */
255 kbd->bi_intfreq /= 1000000L;
256 kbd->bi_busfreq /= 1000000L;
257 #if defined(CONFIG_MPC8220)
258 kbd->bi_inpfreq /= 1000000L;
259 kbd->bi_pcifreq /= 1000000L;
260 kbd->bi_pevfreq /= 1000000L;
261 kbd->bi_flbfreq /= 1000000L;
262 kbd->bi_vcofreq /= 1000000L;
264 #if defined(CONFIG_CPM2)
265 kbd->bi_cpmfreq /= 1000000L;
266 kbd->bi_brgfreq /= 1000000L;
267 kbd->bi_sccfreq /= 1000000L;
268 kbd->bi_vco /= 1000000L;
270 #if defined(CONFIG_MPC5xxx)
271 kbd->bi_ipbfreq /= 1000000L;
272 kbd->bi_pcifreq /= 1000000L;
273 #endif /* CONFIG_MPC5xxx */
277 #if defined(CONFIG_OF_LIBFDT)
278 static void fdt_error (const char *msg)
282 puts (" - must RESET the board to recover.\n");
285 static image_header_t *image_get_fdt (ulong fdt_addr)
287 image_header_t *fdt_hdr = (image_header_t *)fdt_addr;
289 image_print_contents (fdt_hdr);
291 puts (" Verifying Checksum ... ");
292 if (!image_check_hcrc (fdt_hdr)) {
293 fdt_error ("fdt header checksum invalid");
297 if (!image_check_dcrc (fdt_hdr)) {
298 fdt_error ("fdt checksum invalid");
303 if (!image_check_type (fdt_hdr, IH_TYPE_FLATDT)) {
304 fdt_error ("uImage is not a fdt");
307 if (image_get_comp (fdt_hdr) != IH_COMP_NONE) {
308 fdt_error ("uImage is compressed");
311 if (fdt_check_header ((char *)image_get_data (fdt_hdr)) != 0) {
312 fdt_error ("uImage data is not a fdt");
318 static int get_fdt (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
319 bootm_headers_t *images, char **of_flat_tree, ulong *of_size)
322 image_header_t *fdt_hdr;
323 char *fdt_blob = NULL;
324 ulong image_start, image_end;
325 ulong load_start, load_end;
326 #if defined(CONFIG_FIT)
328 const char *fit_uname_config = NULL;
329 const char *fit_uname_fdt = NULL;
334 #if defined(CONFIG_FIT)
336 * If the FDT blob comes from the FIT image and the FIT image
337 * address is omitted in the command line argument, try to use
338 * ramdisk or os FIT image address or default load address.
340 if (images->fit_uname_rd)
341 default_addr = (ulong)images->fit_hdr_rd;
342 else if (images->fit_uname_os)
343 default_addr = (ulong)images->fit_hdr_os;
345 default_addr = load_addr;
347 if (fit_parse_conf (argv[3], default_addr,
348 &fdt_addr, &fit_uname_config)) {
349 debug ("* fdt: config '%s' from image at 0x%08lx\n",
350 fit_uname_config, fdt_addr);
351 } else if (fit_parse_subimage (argv[3], default_addr,
352 &fdt_addr, &fit_uname_fdt)) {
353 debug ("* fdt: subimage '%s' from image at 0x%08lx\n",
354 fit_uname_fdt, fdt_addr);
358 fdt_addr = simple_strtoul(argv[3], NULL, 16);
359 debug ("* fdt: cmdline image address = 0x%08lx\n",
363 debug ("## Checking for 'FDT'/'FDT image' at %08lx\n",
366 /* copy from dataflash if needed */
367 fdt_addr = gen_get_image (fdt_addr);
370 * Check if there is an FDT image at the
371 * address provided in the second bootm argument
372 * check image type, for FIT images get a FIT node.
374 switch (gen_image_get_format ((void *)fdt_addr)) {
375 case IMAGE_FORMAT_LEGACY:
376 debug ("* fdt: legacy format image\n");
378 /* verify fdt_addr points to a valid image header */
379 printf ("## Flattened Device Tree Legacy Image at %08lx\n",
381 fdt_hdr = image_get_fdt (fdt_addr);
386 * move image data to the load address,
387 * make sure we don't overwrite initial image
389 image_start = (ulong)fdt_hdr;
390 image_end = image_get_image_end (fdt_hdr);
392 load_start = image_get_load (fdt_hdr);
393 load_end = load_start + image_get_data_size (fdt_hdr);
395 if ((load_start < image_end) && (load_end > image_start)) {
396 fdt_error ("fdt overwritten");
399 memmove ((void *)image_get_load (fdt_hdr),
400 (void *)image_get_data (fdt_hdr),
401 image_get_data_size (fdt_hdr));
403 fdt_blob = (char *)image_get_load (fdt_hdr);
405 case IMAGE_FORMAT_FIT:
407 * This case will catch both: new uImage format
408 * (libfdt based) and raw FDT blob (also libfdt
411 #if defined(CONFIG_FIT)
412 /* check FDT blob vs FIT blob */
413 if (0) { /* FIXME: call FIT format verification */
417 fit_hdr = (void *)fdt_addr;
418 debug ("* fdt: FIT format image\n");
419 fit_unsupported_reset ("PPC fdt");
427 debug ("* fdt: raw FDT blob\n");
428 printf ("## Flattened Device Tree blob at %08lx\n", fdt_blob);
429 fdt_blob = (char *)fdt_addr;
433 fdt_error ("Did not find a cmdline Flattened Device Tree");
437 printf (" Booting using the fdt blob at 0x%x\n", fdt_blob);
439 } else if (images->legacy_hdr_valid &&
440 image_check_type (images->legacy_hdr_os, IH_TYPE_MULTI)) {
442 ulong fdt_data, fdt_len;
445 * Now check if we have a legacy multi-component image,
446 * get second entry data start address and len.
448 printf ("## Flattened Device Tree from multi "
449 "component Image at %08lX\n",
450 (ulong)images->legacy_hdr_os);
452 image_multi_getimg (images->legacy_hdr_os, 2, &fdt_data, &fdt_len);
455 fdt_blob = (char *)fdt_data;
456 printf (" Booting using the fdt at 0x%x\n", fdt_blob);
458 if (fdt_check_header (fdt_blob) != 0) {
459 fdt_error ("image is not a fdt");
463 if (be32_to_cpu (fdt_totalsize (fdt_blob)) != fdt_len) {
464 fdt_error ("fdt size != image size");
468 fdt_error ("Did not find a Flattened Device Tree "
469 "in a legacy multi-component image");
473 debug ("## No Flattened Device Tree\n");
474 *of_flat_tree = NULL;
479 *of_flat_tree = fdt_blob;
480 *of_size = be32_to_cpu (fdt_totalsize (fdt_blob));
481 debug (" of_flat_tree at 0x%08lx size 0x%08lx\n",
482 *of_flat_tree, *of_size);
487 do_reset (cmdtp, flag, argc, argv);
491 static ulong fdt_relocate (ulong alloc_current,
492 cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
493 char **of_flat_tree, ulong *of_size)
495 char *fdt_blob = *of_flat_tree;
497 ulong new_alloc_current;
501 return alloc_current;
503 if (fdt_check_header (fdt_blob) != 0) {
504 fdt_error ("image is not a fdt");
509 /* move the blob if it is in flash (set relocate) */
510 if (addr2info ((ulong)fdt_blob) != NULL)
516 * The blob must be within CFG_BOOTMAPSZ,
517 * so we flag it to be copied if it is not.
519 if (fdt_blob >= (char *)CFG_BOOTMAPSZ)
523 /* move flattend device tree if needed */
526 ulong of_start, of_len;
530 /* position on a 4K boundary before the alloc_current */
531 of_start = alloc_current - of_len;
532 of_start &= ~(4096 - 1); /* align on page */
534 debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
535 (ulong)fdt_blob, (ulong)fdt_blob + of_len - 1,
538 printf (" Loading Device Tree to %08lx, end %08lx ... ",
539 of_start, of_start + of_len - 1);
541 err = fdt_open_into (fdt_blob, (void *)of_start, of_len);
543 fdt_error ("fdt move failed");
548 *of_flat_tree = (char *)of_start;
549 new_alloc_current = of_start;
551 *of_flat_tree = fdt_blob;
552 new_alloc_current = alloc_current;
555 return new_alloc_current;
558 do_reset (cmdtp, flag, argc, argv);