In message <C6D44AA99ECEB540A5498F15F92DA07D228E3C at amperion01.amperion.com>
you wrote:
>
> You may be loading the code too low. See the comments for the
> CFG_BOOTMAPSZ parameter in CONFIG_WALNUT405.h and cmd_bootm.c. Try
> loading at 0x800000 instead.
No; loading at 400000 (= 4 MB) leaves enough room for the kernel to
uncompress; also, the kernel is booting fine until it get's stuck.
> > Kernel command line: console=ttyS0,9600 root=/dev/ram
> > Warning: real time clock seems stuck!
This is a common problem on boards that don't have a RTC at all, or
only one which becomes available only later during the boot process,
for example after loading the I2C drivers.
You can find a fix in rev. 1.6 of kernel/time.c in the 2.4.4 source
tree on our CVS server; here is the relevant pert (omitting many
lines that only contain white space changes due to changing
indentation):
Index: kernel/time.c
===================================================================
RCS file: /cvsroot/linux-2.4/arch/ppc/kernel/time.c,v
retrieving revision 1.5
retrieving revision 1.6
diff -u -w -r1.5 -r1.6
--- kernel/time.c 16 Apr 2001 19:29:07 -0000 1.5
+++ kernel/time.c 11 Jun 2002 22:05:26 -0000 1.6
@@ -310,6 +310,7 @@
* makes things more complex. Repeatedly read the RTC until the
* next second boundary to try to achieve some precision...
*/
+ if (ppc_md.get_rtc_time) {
stamp = get_native_tbl();
sec = ppc_md.get_rtc_time();
elapsed = 0;
@@ -331,6 +332,8 @@
/* No update now, we just read the time from the RTC ! */
last_rtc_update = xtime.tv_sec;
write_unlock_irqrestore(&xtime_lock, flags);
+ }
+
/* Not exact, but the timer interrupt takes care of this */
set_dec(tb_ticks_per_jiffy);
Then make sure that your board sets ppc_md.get_rtc_time to NULL.
Best regards,
Wolfgang Denk
--
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
Am I your nanny? The kernel is there to support user programs, but
it's a _resource_ handler, not a baby feeder. - Linus Torvalds in
<Pine.LNX.3.91.960425074845.22041C-100000 at linux.cs.Helsinki.FI>
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