Re: imx27 - hanging at freeing init memory -- getting some junk characters here after on console ..

Hi ,

As you have suggested we tried on main line kernel also. It is hanging at the same point...

Freeing init memory..
After this some junk characters.

We have measured the baud rate through CRO. It shows 8.6 us (115200) which is correct.

Platform dependent changes
Platform : IMX27ads board
clock changes & memory changes

will there be any platform dependency with UART driver?
We did not do any modification here. It seems both the lower version kernel and higher version kernel is same.

Already working lower version kernel is not taking the command line arguments [ passed from the CONFIG ]
its taking the boot loader arguments only. so we just did a hack so that it will take our CONFIG command line arguments.
[commented strlcpy() @ arch/arm/kernel/setup.c - fn : parse_tag_cmdline ]
we are getting error : kernel panic - not syncing VFS: unagle to mount roof fs on unknown-block(1,0)

I like to check the kernel booting at every step.
Is there any doc telling the kernel booting check up. [ like clock , memory init , console etc ]
so that i can trace the problem....

Thanks and regards ,
Vadivelan M

-----Daniel Mack wrote: -----

To: Vadivelan M <[email protected]>
From: Daniel Mack <[email protected]>
Date: 11/10/2009 12:19PM
cc: [email protected], [email protected]
Subject: Re: imx27 - hanging at freeing init memory -- getting some junk characters here after on console ..

On Fri, Nov 06, 2009 at 11:12:03AM +0530, Vadivelan M wrote:
> I have checked the inittab. the baud rate is correct.
>
> When i am passing command line arguments "init=bin/sh
> consloe=ttymxc0,115200 root=/dev/ram rw ip=off"
>
> same status. i can see the print Freeing init memory and some uart
> function prints...
>
> After that only junk characters are coming.
>
> we have checked serial drivers . almost no changes between 2.6.19(working
> kernel) and 2.6.27
>
> Please help us to go forward.....

Sorry, I don't know then. I was sure you're facing a baud rate issue,
which also is a common pitfall.

Can you try using a current mainline git kernel and see if the problem
persists? Your machine type (MX27ADS) should be supported.

Daniel

=====-----=====-----=====
Notice: The information contained in this e-mail
message and/or attachments to it may contain
confidential or privileged information. If you are
not the intended recipient, any dissemination, use,
review, distribution, printing or copying of the
information contained in this e-mail message
and/or attachments to it are strictly prohibited. If
you have received this communication in error,
please notify us by reply e-mail or telephone and
immediately and permanently delete the message
and any attachments. Thank you

_______________________________________________
linux-arm mailing list
[email protected]
http://lists.infradead.org/mailman/listinfo/linux-arm