Re: Init hangs on Xilinx4

From: "David H. Lynch Jr." <dhlii@dlasys.net>
To: schardt <g.schardt@fz-juelich.de>
Cc: Linux PPC Linux PPC <linuxppc-embedded@ozlabs.org>
Subject: Re: Init hangs on Xilinx4
Date: Thu, 29 Nov 2007 07:41:17 -0500	[thread overview]
Message-ID: <474EB36D.1080408@dlasys.net> (raw)
In-Reply-To: <474D8839.6020609@fz-juelich.de>

I had a similar problem. In my instance it turned out that I was
inadvertently using the physical address of my uart as the output address.
This worked during boot becasue there was a 1:1 physical-logical entry
stuffed into the MMU. But since Linux did nto know about it, as soon as
the VM system decided to use that TLB entry IO died - right in the
middle of a string.

While it is unlikely you made exactly the same mistake. One area you can
check is memory.

What is your output device ?

schardt wrote:
> Hi all,
>
> i still have some problems booting linux from flash and don't know how
> to debug.
>
> i have a xilinx4-ppc with 64MB Ram and 4MB Flash, U-Boot works fine,
> kernel is booting, but my little hello world program runs as init, died
> after printing "He" (intead of "Hello World"). i tried initramfs with
> build in cpio-image and jffs2 rootfs
>
> Is there a log-buffer to look at ?
> Should i try another compiler version ? (btw. booting from systemace
> works with the version i use).
>
> ---------------------------
> famous last words :
>
> [   50.476641] VFS: Mounted root (jffs2 filesystem).
> [   50.533581] Freeing unused kernel memory: 68k init
> He
> ---------------------------
>
>
> regards
> Georg
>
>
>
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-- 
Dave Lynch 					  	    DLA Systems
Software Development:  				         Embedded Linux
717.627.3770 	       dhlii@dlasys.net 	  http://www.dlasys.net
fax: 1.253.369.9244 			           Cell: 1.717.587.7774
Over 25 years' experience in platforms, languages, and technologies too numerous to list.

"Any intelligent fool can make things bigger and more complex... It takes a touch of genius - and a lot of courage to move in the opposite direction."
Albert Einstein