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,
63 int argc, char *argv[],
64 bootm_headers_t *images,
67 ulong sp, sp_limit, alloc_current;
69 ulong initrd_start, initrd_end;
70 ulong rd_data_start, rd_data_end, rd_len;
72 ulong cmd_start, cmd_end;
75 void (*kernel)(bd_t *, ulong, ulong, ulong, ulong);
77 #if defined(CONFIG_OF_LIBFDT)
78 char *of_flat_tree = NULL;
83 * Booting a (Linux) kernel image
85 * Allocate space for command line and board info - the
86 * address should be as high as possible within the reach of
87 * the kernel (see CFG_BOOTMAPSZ settings), but in unused
88 * memory, which means far enough below the current stack
92 debug ("## Current stack ends at 0x%08lx ", sp);
94 alloc_current = sp_limit = get_boot_sp_limit(sp);
95 debug ("=> set upper limit to 0x%08lx\n", sp_limit);
97 /* allocate space and init command line */
98 alloc_current = get_boot_cmdline (alloc_current, &cmd_start, &cmd_end);
100 /* allocate space for kernel copy of board info */
101 alloc_current = get_boot_kbd (alloc_current, &kbd);
102 set_clocks_in_mhz(kbd);
104 /* find kernel entry point */
105 if (images->legacy_hdr_valid) {
106 ep = image_get_ep (images->legacy_hdr_os);
107 #if defined(CONFIG_FIT)
108 } else if (images->fit_uname_os) {
109 fit_unsupported_reset ("PPC linux bootm");
110 do_reset (cmdtp, flag, argc, argv);
113 puts ("Could not find kernel entry point!\n");
114 do_reset (cmdtp, flag, argc, argv);
116 kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))ep;
119 get_ramdisk (cmdtp, flag, argc, argv, images, verify,
120 IH_ARCH_PPC, &rd_data_start, &rd_data_end);
122 rd_len = rd_data_end - rd_data_start;
124 alloc_current = ramdisk_high (alloc_current, rd_data_start, rd_len,
125 kbd, sp_limit, get_sp (),
126 &initrd_start, &initrd_end);
128 #if defined(CONFIG_OF_LIBFDT)
129 /* find flattened device tree */
130 get_fdt (cmdtp, flag, argc, argv, images, &of_flat_tree, &of_size);
132 alloc_current = fdt_relocate (alloc_current,
133 cmdtp, flag, argc, argv, &of_flat_tree, &of_size);
136 * Add the chosen node if it doesn't exist, add the env and bd_t
137 * if the user wants it (the logic is in the subroutines).
140 if (fdt_chosen(of_flat_tree, initrd_start, initrd_end, 0) < 0) {
141 fdt_error ("/chosen node create failed");
142 do_reset (cmdtp, flag, argc, argv);
144 #ifdef CONFIG_OF_HAS_UBOOT_ENV
145 if (fdt_env(of_flat_tree) < 0) {
146 fdt_error ("/u-boot-env node create failed");
147 do_reset (cmdtp, flag, argc, argv);
150 #ifdef CONFIG_OF_HAS_BD_T
151 if (fdt_bd_t(of_flat_tree) < 0) {
152 fdt_error ("/bd_t node create failed");
153 do_reset (cmdtp, flag, argc, argv);
156 #ifdef CONFIG_OF_BOARD_SETUP
157 /* Call the board-specific fixup routine */
158 ft_board_setup(of_flat_tree, gd->bd);
161 #endif /* CONFIG_OF_LIBFDT */
163 debug ("## Transferring control to Linux (at address %08lx) ...\n",
166 show_boot_progress (15);
168 #if defined(CFG_INIT_RAM_LOCK) && !defined(CONFIG_E500)
169 unlock_ram_in_cache();
172 #if defined(CONFIG_OF_LIBFDT)
173 if (of_flat_tree) { /* device tree; boot new style */
175 * Linux Kernel Parameters (passing device tree):
176 * r3: pointer to the fdt, followed by the board info data
177 * r4: physical pointer to the kernel itself
182 (*kernel) ((bd_t *)of_flat_tree, (ulong)kernel, 0, 0, 0);
183 /* does not return */
187 * Linux Kernel Parameters (passing board info data):
188 * r3: ptr to board info data
189 * r4: initrd_start or 0 if no initrd
190 * r5: initrd_end - unused if r4 is 0
191 * r6: Start of command line string
192 * r7: End of command line string
194 (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
195 /* does not return */
198 static ulong get_sp (void)
202 asm( "mr %0,1": "=r"(sp) : );
206 static void set_clocks_in_mhz (bd_t *kbd)
210 if ((s = getenv ("clocks_in_mhz")) != NULL) {
211 /* convert all clock information to MHz */
212 kbd->bi_intfreq /= 1000000L;
213 kbd->bi_busfreq /= 1000000L;
214 #if defined(CONFIG_MPC8220)
215 kbd->bi_inpfreq /= 1000000L;
216 kbd->bi_pcifreq /= 1000000L;
217 kbd->bi_pevfreq /= 1000000L;
218 kbd->bi_flbfreq /= 1000000L;
219 kbd->bi_vcofreq /= 1000000L;
221 #if defined(CONFIG_CPM2)
222 kbd->bi_cpmfreq /= 1000000L;
223 kbd->bi_brgfreq /= 1000000L;
224 kbd->bi_sccfreq /= 1000000L;
225 kbd->bi_vco /= 1000000L;
227 #if defined(CONFIG_MPC5xxx)
228 kbd->bi_ipbfreq /= 1000000L;
229 kbd->bi_pcifreq /= 1000000L;
230 #endif /* CONFIG_MPC5xxx */
234 #if defined(CONFIG_OF_LIBFDT)
235 static void fdt_error (const char *msg)
239 puts (" - must RESET the board to recover.\n");
242 static void get_fdt (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
243 bootm_headers_t *images, char **of_flat_tree, ulong *of_size)
246 image_header_t *fdt_hdr;
247 char *fdt_blob = NULL;
248 ulong image_start, image_end;
249 ulong load_start, load_end;
250 #if defined(CONFIG_FIT)
252 const char *fit_uname_config = NULL;
253 const char *fit_uname_fdt = NULL;
258 #if defined(CONFIG_FIT)
260 * If the FDT blob comes from the FIT image and the FIT image
261 * address is omitted in the command line argument, try to use
262 * ramdisk or os FIT image address or default load address.
264 if (images->fit_uname_rd)
265 default_addr = (ulong)images->fit_hdr_rd;
266 else if (images->fit_uname_os)
267 default_addr = (ulong)images->fit_hdr_os;
269 default_addr = load_addr;
271 if (fit_parse_conf (argv[3], default_addr,
272 &fdt_addr, &fit_uname_config)) {
273 debug ("* fdt: config '%s' from image at 0x%08lx\n",
274 fit_uname_config, fdt_addr);
275 } else if (fit_parse_subimage (argv[3], default_addr,
276 &fdt_addr, &fit_uname_fdt)) {
277 debug ("* fdt: subimage '%s' from image at 0x%08lx\n",
278 fit_uname_fdt, fdt_addr);
282 fdt_addr = simple_strtoul(argv[3], NULL, 16);
283 debug ("* fdt: cmdline image address = 0x%08lx\n",
287 debug ("## Checking for 'FDT'/'FDT image' at %08lx\n",
290 /* copy from dataflash if needed */
291 fdt_addr = gen_get_image (fdt_addr);
294 * Check if there is an FDT image at the
295 * address provided in the second bootm argument
296 * check image type, for FIT images get a FIT node.
298 switch (gen_image_get_format ((void *)fdt_addr)) {
299 case IMAGE_FORMAT_LEGACY:
300 debug ("* fdt: legacy format image\n");
302 fdt_hdr = (image_header_t *)fdt_addr;
303 printf ("## Flattened Device Tree Legacy Image at %08lx\n",
306 image_print_contents (fdt_hdr);
308 image_start = (ulong)fdt_hdr;
309 image_end = image_get_image_end (fdt_hdr);
311 load_start = image_get_load (fdt_hdr);
312 load_end = load_start + image_get_data_size (fdt_hdr);
314 if ((load_start < image_end) && (load_end > image_start)) {
315 fdt_error ("fdt overwritten");
316 do_reset (cmdtp, flag, argc, argv);
319 puts (" Verifying Checksum ... ");
320 if (!image_check_hcrc (fdt_hdr)) {
321 fdt_error ("fdt header checksum invalid");
322 do_reset (cmdtp, flag, argc, argv);
325 if (!image_check_dcrc (fdt_hdr)) {
326 fdt_error ("fdt checksum invalid");
327 do_reset (cmdtp, flag, argc, argv);
331 if (!image_check_type (fdt_hdr, IH_TYPE_FLATDT)) {
332 fdt_error ("uImage is not a fdt");
333 do_reset (cmdtp, flag, argc, argv);
335 if (image_get_comp (fdt_hdr) != IH_COMP_NONE) {
336 fdt_error ("uImage is compressed");
337 do_reset (cmdtp, flag, argc, argv);
339 if (fdt_check_header ((char *)image_get_data (fdt_hdr)) != 0) {
340 fdt_error ("uImage data is not a fdt");
341 do_reset (cmdtp, flag, argc, argv);
344 memmove ((void *)image_get_load (fdt_hdr),
345 (void *)image_get_data (fdt_hdr),
346 image_get_data_size (fdt_hdr));
348 fdt_blob = (char *)image_get_load (fdt_hdr);
350 #if defined(CONFIG_FIT)
351 case IMAGE_FORMAT_FIT:
353 /* check FDT blob vs FIT hdr */
354 if (fit_uname_config || fit_uname_fdt) {
358 fit_hdr = (void *)fdt_addr;
359 debug ("* fdt: FIT format image\n");
360 fit_unsupported_reset ("PPC fdt");
361 do_reset (cmdtp, flag, argc, argv);
366 printf ("## Flattened Device Tree blob at %08lx\n", fdt_blob);
367 fdt_blob = (char *)fdt_addr;
372 fdt_error ("Did not find a cmdline Flattened Device Tree");
373 do_reset (cmdtp, flag, argc, argv);
376 printf (" Booting using the fdt blob at 0x%x\n", fdt_blob);
378 } else if (images->legacy_hdr_valid &&
379 image_check_type (images->legacy_hdr_os, IH_TYPE_MULTI)) {
381 ulong fdt_data, fdt_len;
384 * Now check if we have a legacy multi-component image,
385 * get second entry data start address and len.
387 printf ("## Flattened Device Tree from multi "
388 "component Image at %08lX\n",
389 (ulong)images->legacy_hdr_os);
391 image_multi_getimg (images->legacy_hdr_os, 2, &fdt_data, &fdt_len);
394 fdt_blob = (char *)fdt_data;
395 printf (" Booting using the fdt at 0x%x\n", fdt_blob);
397 if (fdt_check_header (fdt_blob) != 0) {
398 fdt_error ("image is not a fdt");
399 do_reset (cmdtp, flag, argc, argv);
402 if (be32_to_cpu (fdt_totalsize (fdt_blob)) != fdt_len) {
403 fdt_error ("fdt size != image size");
404 do_reset (cmdtp, flag, argc, argv);
407 fdt_error ("Did not find a Flattened Device Tree "
408 "in a legacy multi-component image");
409 do_reset (cmdtp, flag, argc, argv);
412 debug ("## No Flattened Device Tree\n");
413 *of_flat_tree = NULL;
418 *of_flat_tree = fdt_blob;
419 *of_size = be32_to_cpu (fdt_totalsize (fdt_blob));
420 debug (" of_flat_tree at 0x%08lx size 0x%08lx\n",
421 *of_flat_tree, *of_size);
424 static ulong fdt_relocate (ulong alloc_current,
425 cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
426 char **of_flat_tree, ulong *of_size)
428 char *fdt_blob = *of_flat_tree;
430 ulong new_alloc_current;
434 return alloc_current;
436 if (fdt_check_header (fdt_blob) != 0) {
437 fdt_error ("image is not a fdt");
438 do_reset (cmdtp, flag, argc, argv);
442 /* move the blob if it is in flash (set relocate) */
443 if (addr2info ((ulong)fdt_blob) != NULL)
449 * The blob must be within CFG_BOOTMAPSZ,
450 * so we flag it to be copied if it is not.
452 if (fdt_blob >= (char *)CFG_BOOTMAPSZ)
456 /* move flattend device tree if needed */
459 ulong of_start, of_len;
463 /* position on a 4K boundary before the alloc_current */
464 of_start = alloc_current - of_len;
465 of_start &= ~(4096 - 1); /* align on page */
467 debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
468 (ulong)fdt_blob, (ulong)fdt_blob + of_len - 1,
471 printf (" Loading Device Tree to %08lx, end %08lx ... ",
472 of_start, of_start + of_len - 1);
474 err = fdt_open_into (fdt_blob, (void *)of_start, of_len);
476 fdt_error ("fdt move failed");
477 do_reset (cmdtp, flag, argc, argv);
481 *of_flat_tree = (char *)of_start;
482 new_alloc_current = of_start;
484 *of_flat_tree = fdt_blob;
485 new_alloc_current = alloc_current;
488 return new_alloc_current;