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 kbd, sp_limit, get_sp (),
124 &initrd_start, &initrd_end);
126 #if defined(CONFIG_OF_LIBFDT)
127 /* find flattened device tree */
128 get_fdt (cmdtp, flag, argc, argv, images, &of_flat_tree, &of_size);
130 alloc_current = fdt_relocate (alloc_current,
131 cmdtp, flag, argc, argv, &of_flat_tree, &of_size);
134 * Add the chosen node if it doesn't exist, add the env and bd_t
135 * if the user wants it (the logic is in the subroutines).
138 if (fdt_chosen(of_flat_tree, initrd_start, initrd_end, 0) < 0) {
139 fdt_error ("/chosen node create failed");
140 do_reset (cmdtp, flag, argc, argv);
142 #ifdef CONFIG_OF_HAS_UBOOT_ENV
143 if (fdt_env(of_flat_tree) < 0) {
144 fdt_error ("/u-boot-env node create failed");
145 do_reset (cmdtp, flag, argc, argv);
148 #ifdef CONFIG_OF_HAS_BD_T
149 if (fdt_bd_t(of_flat_tree) < 0) {
150 fdt_error ("/bd_t node create failed");
151 do_reset (cmdtp, flag, argc, argv);
154 #ifdef CONFIG_OF_BOARD_SETUP
155 /* Call the board-specific fixup routine */
156 ft_board_setup(of_flat_tree, gd->bd);
159 #endif /* CONFIG_OF_LIBFDT */
161 debug ("## Transferring control to Linux (at address %08lx) ...\n",
164 show_boot_progress (15);
166 #if defined(CFG_INIT_RAM_LOCK) && !defined(CONFIG_E500)
167 unlock_ram_in_cache();
170 #if defined(CONFIG_OF_LIBFDT)
171 if (of_flat_tree) { /* device tree; boot new style */
173 * Linux Kernel Parameters (passing device tree):
174 * r3: pointer to the fdt, followed by the board info data
175 * r4: physical pointer to the kernel itself
180 (*kernel) ((bd_t *)of_flat_tree, (ulong)kernel, 0, 0, 0);
181 /* does not return */
185 * Linux Kernel Parameters (passing board info data):
186 * r3: ptr to board info data
187 * r4: initrd_start or 0 if no initrd
188 * r5: initrd_end - unused if r4 is 0
189 * r6: Start of command line string
190 * r7: End of command line string
192 (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
193 /* does not return */
196 static ulong get_sp (void)
200 asm( "mr %0,1": "=r"(sp) : );
204 static void set_clocks_in_mhz (bd_t *kbd)
208 if ((s = getenv ("clocks_in_mhz")) != NULL) {
209 /* convert all clock information to MHz */
210 kbd->bi_intfreq /= 1000000L;
211 kbd->bi_busfreq /= 1000000L;
212 #if defined(CONFIG_MPC8220)
213 kbd->bi_inpfreq /= 1000000L;
214 kbd->bi_pcifreq /= 1000000L;
215 kbd->bi_pevfreq /= 1000000L;
216 kbd->bi_flbfreq /= 1000000L;
217 kbd->bi_vcofreq /= 1000000L;
219 #if defined(CONFIG_CPM2)
220 kbd->bi_cpmfreq /= 1000000L;
221 kbd->bi_brgfreq /= 1000000L;
222 kbd->bi_sccfreq /= 1000000L;
223 kbd->bi_vco /= 1000000L;
225 #if defined(CONFIG_MPC5xxx)
226 kbd->bi_ipbfreq /= 1000000L;
227 kbd->bi_pcifreq /= 1000000L;
228 #endif /* CONFIG_MPC5xxx */
232 #if defined(CONFIG_OF_LIBFDT)
233 static void fdt_error (const char *msg)
237 puts (" - must RESET the board to recover.\n");
240 static void get_fdt (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
241 bootm_headers_t *images, char **of_flat_tree, ulong *of_size)
244 image_header_t *fdt_hdr;
245 char *fdt_blob = NULL;
246 ulong image_start, image_end;
247 ulong load_start, load_end;
248 #if defined(CONFIG_FIT)
250 const char *fit_uname_config = NULL;
251 const char *fit_uname_fdt = NULL;
256 #if defined(CONFIG_FIT)
258 * If the FDT blob comes from the FIT image and the FIT image
259 * address is omitted in the command line argument, try to use
260 * ramdisk or os FIT image address or default load address.
262 if (images->fit_uname_rd)
263 default_addr = (ulong)images->fit_hdr_rd;
264 else if (images->fit_uname_os)
265 default_addr = (ulong)images->fit_hdr_os;
267 default_addr = load_addr;
269 if (fit_parse_conf (argv[3], default_addr,
270 &fdt_addr, &fit_uname_config)) {
271 debug ("* fdt: config '%s' from image at 0x%08lx\n",
272 fit_uname_config, fdt_addr);
273 } else if (fit_parse_subimage (argv[3], default_addr,
274 &fdt_addr, &fit_uname_fdt)) {
275 debug ("* fdt: subimage '%s' from image at 0x%08lx\n",
276 fit_uname_fdt, fdt_addr);
280 fdt_addr = simple_strtoul(argv[3], NULL, 16);
281 debug ("* fdt: cmdline image address = 0x%08lx\n",
285 debug ("## Checking for 'FDT'/'FDT image' at %08lx\n",
288 /* copy from dataflash if needed */
289 fdt_addr = gen_get_image (fdt_addr);
292 * Check if there is an FDT image at the
293 * address provided in the second bootm argument
294 * check image type, for FIT images get a FIT node.
296 switch (gen_image_get_format ((void *)fdt_addr)) {
297 case IMAGE_FORMAT_LEGACY:
298 debug ("* fdt: legacy format image\n");
300 fdt_hdr = (image_header_t *)fdt_addr;
301 printf ("## Flattened Device Tree Legacy Image at %08lx\n",
304 image_print_contents (fdt_hdr);
306 image_start = (ulong)fdt_hdr;
307 image_end = image_get_image_end (fdt_hdr);
309 load_start = image_get_load (fdt_hdr);
310 load_end = load_start + image_get_data_size (fdt_hdr);
312 if ((load_start < image_end) && (load_end > image_start)) {
313 fdt_error ("fdt overwritten");
314 do_reset (cmdtp, flag, argc, argv);
317 puts (" Verifying Checksum ... ");
318 if (!image_check_hcrc (fdt_hdr)) {
319 fdt_error ("fdt header checksum invalid");
320 do_reset (cmdtp, flag, argc, argv);
323 if (!image_check_dcrc (fdt_hdr)) {
324 fdt_error ("fdt checksum invalid");
325 do_reset (cmdtp, flag, argc, argv);
329 if (!image_check_type (fdt_hdr, IH_TYPE_FLATDT)) {
330 fdt_error ("uImage is not a fdt");
331 do_reset (cmdtp, flag, argc, argv);
333 if (image_get_comp (fdt_hdr) != IH_COMP_NONE) {
334 fdt_error ("uImage is compressed");
335 do_reset (cmdtp, flag, argc, argv);
337 if (fdt_check_header ((char *)image_get_data (fdt_hdr)) != 0) {
338 fdt_error ("uImage data is not a fdt");
339 do_reset (cmdtp, flag, argc, argv);
342 memmove ((void *)image_get_load (fdt_hdr),
343 (void *)image_get_data (fdt_hdr),
344 image_get_data_size (fdt_hdr));
346 fdt_blob = (char *)image_get_load (fdt_hdr);
348 #if defined(CONFIG_FIT)
349 case IMAGE_FORMAT_FIT:
351 /* check FDT blob vs FIT hdr */
352 if (fit_uname_config || fit_uname_fdt) {
356 fit_hdr = (void *)fdt_addr;
357 debug ("* fdt: FIT format image\n");
358 fit_unsupported_reset ("PPC fdt");
359 do_reset (cmdtp, flag, argc, argv);
364 printf ("## Flattened Device Tree blob at %08lx\n", fdt_blob);
365 fdt_blob = (char *)fdt_addr;
370 fdt_error ("Did not find a cmdline Flattened Device Tree");
371 do_reset (cmdtp, flag, argc, argv);
374 printf (" Booting using the fdt blob at 0x%x\n", fdt_blob);
376 } else if (images->legacy_hdr_valid &&
377 image_check_type (images->legacy_hdr_os, IH_TYPE_MULTI)) {
379 ulong fdt_data, fdt_len;
382 * Now check if we have a legacy multi-component image,
383 * get second entry data start address and len.
385 printf ("## Flattened Device Tree from multi "
386 "component Image at %08lX\n",
387 (ulong)images->legacy_hdr_os);
389 image_multi_getimg (images->legacy_hdr_os, 2, &fdt_data, &fdt_len);
392 fdt_blob = (char *)fdt_data;
393 printf (" Booting using the fdt at 0x%x\n", fdt_blob);
395 if (fdt_check_header (fdt_blob) != 0) {
396 fdt_error ("image is not a fdt");
397 do_reset (cmdtp, flag, argc, argv);
400 if (be32_to_cpu (fdt_totalsize (fdt_blob)) != fdt_len) {
401 fdt_error ("fdt size != image size");
402 do_reset (cmdtp, flag, argc, argv);
405 fdt_error ("Did not find a Flattened Device Tree "
406 "in a legacy multi-component image");
407 do_reset (cmdtp, flag, argc, argv);
410 debug ("## No Flattened Device Tree\n");
411 *of_flat_tree = NULL;
416 *of_flat_tree = fdt_blob;
417 *of_size = be32_to_cpu (fdt_totalsize (fdt_blob));
418 debug (" of_flat_tree at 0x%08lx size 0x%08lx\n",
419 *of_flat_tree, *of_size);
422 static ulong fdt_relocate (ulong alloc_current,
423 cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
424 char **of_flat_tree, ulong *of_size)
426 char *fdt_blob = *of_flat_tree;
428 ulong new_alloc_current;
432 return alloc_current;
434 if (fdt_check_header (fdt_blob) != 0) {
435 fdt_error ("image is not a fdt");
436 do_reset (cmdtp, flag, argc, argv);
440 /* move the blob if it is in flash (set relocate) */
441 if (addr2info ((ulong)fdt_blob) != NULL)
447 * The blob must be within CFG_BOOTMAPSZ,
448 * so we flag it to be copied if it is not.
450 if (fdt_blob >= (char *)CFG_BOOTMAPSZ)
454 /* move flattend device tree if needed */
457 ulong of_start, of_len;
461 /* position on a 4K boundary before the alloc_current */
462 of_start = alloc_current - of_len;
463 of_start &= ~(4096 - 1); /* align on page */
465 debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
466 (ulong)fdt_blob, (ulong)fdt_blob + of_len - 1,
469 printf (" Loading Device Tree to %08lx, end %08lx ... ",
470 of_start, of_start + of_len - 1);
472 err = fdt_open_into (fdt_blob, (void *)of_start, of_len);
474 fdt_error ("fdt move failed");
475 do_reset (cmdtp, flag, argc, argv);
479 *of_flat_tree = (char *)of_start;
480 new_alloc_current = of_start;
482 *of_flat_tree = fdt_blob;
483 new_alloc_current = alloc_current;
486 return new_alloc_current;