RE: help with inittab

Chris,

Does your serial output stop after "Freeing unused kernel memory..."

If it does, you may have an interrupt problem with the UART.  I had to
track down that very problem the other day.  As a test, even if my UART
interrupt was purposely misconfigured, I still saw all of the output up
to and including "Freeing unused kernel memory..."

Scott




___________________________________________________________________

  Scott N. Coulter
  Senior Software Engineer
 =20
  Cyclone Microsystems         =20
  370 James Street              Phone:  203.786.5536 ext. 118
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-----Original Message-----
From: linuxppc-embedded-bounces+scott.coulter=3Dcyclone.com@ozlabs.org
[mailto:linuxppc-embedded-bounces+scott.coulter=3Dcyclone.com@ozlabs.org]=

On Behalf Of Chris Dumoulin
Sent: Friday, June 09, 2006 3:15 PM
To: Steve Iribarne (GMail)
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: help with inittab

The init is from Busybox. Since I'm getting output from my serial port=20
during the kernel boot process, I think it's safe to say that my=20
/dev/ttyS0 is properly configured. Besides passing the kernel argument=20
console=3DttyS0,57600, is there anything else I need to do to properly=20
configure the console? I've looked through my kernel configuration to=20
make sure that any serial device or console related stuff was enabled=20
and configured.

I'm feeling pretty stumped.

- Chris

Steve Iribarne (GMail) wrote:

On 6/9/06, Chris Dumoulin [off-list ref] wrote:

quoted

I've now determined that my kernel seems to stop in the following

line

quoted

of code, in the function init(void * unused), in init/main.c:
run_init_process("/sbin/init");

Who's init are  you using??

Are you using Busyboxes or sysinit from GNU?

quoted

I've determined that it stops at this call by stepping through the

code

quoted

with a BDI2000.

My boot arguments are:
console=3DttyS0,57600n8 ip=3Doff root=3D/dev/ram0 rw

My current inittab is:
::sysinit:/etc/rc.sh
::ctrlaltdel:/sbin/reboot
::shutdown:/sbin/swapoff -a
::shutdown:/bin/umount -a -r
::restart:/sbin/init
::respawn:/bin/sh

I've tried adding an "echo" command to the /etc/rc.sh script that is
called, but I don't see any output. I've also trying changing the
::sysinit line in inittab to point to some non-existent script, to

see

quoted

if I'll get some error message, but I still see nothing. Is it

possible

quoted

that /sbin/init is dying before it gets to the point of reading

inittab?

quoted

Any ideas?

Regards,
Chris Dumoulin


Wolfgang Denk wrote:

quoted

In message [ref] you wrote:

quoted

I am using the linux kernel 2.6.15 and initrd ramdisk image from

ELDK

quoted

quoted

quoted

4.0. Currently, I seem to be able to boot without errors, but after

quoted

the

quoted

quoted

root filesystem is mounted, things just stop.

And  what's  your  console  device?  Are  you  passing  any

console=3D

quoted

quoted

arguments  on  the  command  line?  Is the corresponding device

entry

quoted

quoted

present in the /dev/directory?

Best regards,

Wolfgang Denk

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<http://ics-ltd.com/>
<http://ics-ltd.com/>

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5430 Canotek Road
Ottawa, ON
K1J 9G2
(613)749-9241
1-800-267-9794 (USA only)

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