3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 #include <environment.h>
30 #include <asm/byteorder.h>
32 DECLARE_GLOBAL_DATA_PTR
;
36 #define LINUX_MAX_ENVS 256
37 #define LINUX_MAX_ARGS 256
39 #ifdef CONFIG_SHOW_BOOT_PROGRESS
40 # include <status_led.h>
41 # define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg)
43 # define SHOW_BOOT_PROGRESS(arg)
46 extern image_header_t header
;
48 void do_bootm_linux(cmd_tbl_t
* cmdtp
, int flag
,
49 int argc
, char *argv
[],
50 ulong addr
, ulong
* len_ptr
, int verify
)
54 ulong initrd_start
, initrd_end
;
55 ulong cmd_start
, cmd_end
;
58 int initrd_copy_to_ram
= 1;
62 void (*kernel
) (bd_t
*, ulong
, ulong
, ulong
, ulong
);
63 image_header_t
*hdr
= &header
;
65 if ((s
= getenv("initrd_high")) != NULL
) {
66 /* a value of "no" or a similar string will act like 0,
67 * turning the "load high" feature off. This is intentional.
69 initrd_high
= simple_strtoul(s
, NULL
, 16);
70 if (initrd_high
== ~0)
71 initrd_copy_to_ram
= 0;
72 } else { /* not set, no restrictions to load high */
76 #ifdef CONFIG_LOGBUFFER
78 /* Prevent initrd from overwriting logbuffer */
79 if (initrd_high
< (kbd
->bi_memsize
- LOGBUFF_LEN
- LOGBUFF_OVERHEAD
))
80 initrd_high
= kbd
->bi_memsize
- LOGBUFF_LEN
- LOGBUFF_OVERHEAD
;
81 debug("## Logbuffer at 0x%08lX ", kbd
->bi_memsize
- LOGBUFF_LEN
);
85 * Booting a (Linux) kernel image
87 * Allocate space for command line and board info - the
88 * address should be as high as possible within the reach of
89 * the kernel (see CFG_BOOTMAPSZ settings), but in unused
90 * memory, which means far enough below the current stack
93 asm("movel %%a7, %%d0\n"
94 "movel %%d0, %0\n": "=d"(sp
): :"%d0");
96 debug("## Current stack ends at 0x%08lX ", sp
);
98 sp
-= 2048; /* just to be sure */
99 if (sp
> CFG_BOOTMAPSZ
)
103 debug("=> set upper limit to 0x%08lX\n", sp
);
105 cmdline
= (char *)((sp
- CFG_BARGSIZE
) & ~0xF);
106 kbd
= (bd_t
*) (((ulong
) cmdline
- sizeof(bd_t
)) & ~0xF);
108 if ((s
= getenv("bootargs")) == NULL
)
113 cmd_start
= (ulong
) & cmdline
[0];
114 cmd_end
= cmd_start
+ strlen(cmdline
);
119 printf("## cmdline at 0x%08lX ... 0x%08lX\n", cmd_start
, cmd_end
);
121 do_bdinfo(NULL
, 0, 0, NULL
);
124 if ((s
= getenv("clocks_in_mhz")) != NULL
) {
125 /* convert all clock information to MHz */
126 kbd
->bi_intfreq
/= 1000000L;
127 kbd
->bi_busfreq
/= 1000000L;
131 (void (*)(bd_t
*, ulong
, ulong
, ulong
, ulong
))ntohl(hdr
->ih_ep
);
134 * Check if there is an initrd image
138 debug("Not skipping initrd\n");
139 SHOW_BOOT_PROGRESS(9);
141 addr
= simple_strtoul(argv
[2], NULL
, 16);
143 printf("## Loading RAMDisk Image at %08lx ...\n", addr
);
145 /* Copy header so we can blank CRC field for re-calculation */
146 memmove(&header
, (char *)addr
, sizeof(image_header_t
));
148 if (ntohl(hdr
->ih_magic
) != IH_MAGIC
) {
149 puts("Bad Magic Number\n");
150 SHOW_BOOT_PROGRESS(-10);
151 do_reset(cmdtp
, flag
, argc
, argv
);
154 data
= (ulong
) & header
;
155 len
= sizeof(image_header_t
);
157 checksum
= ntohl(hdr
->ih_hcrc
);
160 if (crc32(0, (uchar
*) data
, len
) != checksum
) {
161 puts("Bad Header Checksum\n");
162 SHOW_BOOT_PROGRESS(-11);
163 do_reset(cmdtp
, flag
, argc
, argv
);
166 SHOW_BOOT_PROGRESS(10);
168 print_image_hdr(hdr
);
170 data
= addr
+ sizeof(image_header_t
);
171 len
= ntohl(hdr
->ih_size
);
175 #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
176 ulong cdata
= data
, edata
= cdata
+ len
;
177 #endif /* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG */
179 puts(" Verifying Checksum ... ");
181 #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
183 while (cdata
< edata
) {
184 ulong chunk
= edata
- cdata
;
188 csum
= crc32(csum
, (uchar
*) cdata
, chunk
);
193 #else /* !(CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG) */
194 csum
= crc32(0, (uchar
*) data
, len
);
195 #endif /* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG */
197 if (csum
!= ntohl(hdr
->ih_dcrc
)) {
198 puts("Bad Data CRC\n");
199 SHOW_BOOT_PROGRESS(-12);
200 do_reset(cmdtp
, flag
, argc
, argv
);
205 SHOW_BOOT_PROGRESS(11);
207 if ((hdr
->ih_os
!= IH_OS_LINUX
) ||
208 (hdr
->ih_arch
!= IH_CPU_M68K
) ||
209 (hdr
->ih_type
!= IH_TYPE_RAMDISK
)) {
210 puts("No Linux ColdFire Ramdisk Image\n");
211 SHOW_BOOT_PROGRESS(-13);
212 do_reset(cmdtp
, flag
, argc
, argv
);
216 * Now check if we have a multifile image
218 } else if ((hdr
->ih_type
== IH_TYPE_MULTI
) && (len_ptr
[1])) {
219 u_long tail
= ntohl(len_ptr
[0]) % 4;
222 SHOW_BOOT_PROGRESS(13);
224 /* skip kernel length and terminator */
225 data
= (ulong
) (&len_ptr
[2]);
226 /* skip any additional image length fields */
227 for (i
= 1; len_ptr
[i
]; ++i
)
229 /* add kernel length, and align */
230 data
+= ntohl(len_ptr
[0]);
235 len
= ntohl(len_ptr
[1]);
241 SHOW_BOOT_PROGRESS(14);
247 debug("No initrd\n");
251 if (!initrd_copy_to_ram
) { /* zero-copy ramdisk support */
253 initrd_end
= initrd_start
+ len
;
255 initrd_start
= (ulong
) kbd
- len
;
256 initrd_start
&= ~(4096 - 1); /* align on page */
262 * the inital ramdisk does not need to be within
263 * CFG_BOOTMAPSZ as it is not accessed until after
264 * the mm system is initialised.
266 * do the stack bottom calculation again and see if
267 * the initrd will fit just below the monitor stack
268 * bottom without overwriting the area allocated
269 * above for command line args and board info.
271 asm("movel %%a7, %%d0\n"
272 "movel %%d0, %0\n": "=d"(nsp
): :"%d0");
274 nsp
-= 2048; /* just to be sure */
277 if (nsp
> initrd_high
) /* limit as specified */
281 nsp
&= ~(4096 - 1); /* align on page */
287 SHOW_BOOT_PROGRESS(12);
290 ("## initrd at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
291 data
, data
+ len
- 1, len
, len
);
293 initrd_end
= initrd_start
+ len
;
294 printf(" Loading Ramdisk to %08lx, end %08lx ... ",
295 initrd_start
, initrd_end
);
296 #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
299 void *to
= (void *)initrd_start
;
300 void *from
= (void *)data
;
304 (l
> CHUNKSZ
) ? CHUNKSZ
: l
;
306 memmove(to
, from
, tail
);
312 #else /* !(CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG) */
313 memmove((void *)initrd_start
, (void *)data
, len
);
314 #endif /* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG */
322 debug("## Transferring control to Linux (at address %08lx) ...\n",
325 SHOW_BOOT_PROGRESS(15);
328 * Linux Kernel Parameters (passing board info data):
329 * r3: ptr to board info data
330 * r4: initrd_start or 0 if no initrd
331 * r5: initrd_end - unused if r4 is 0
332 * r6: Start of command line string
333 * r7: End of command line string
335 (*kernel
) (kbd
, initrd_start
, initrd_end
, cmd_start
, cmd_end
);
336 /* does not return */