Linux on Memec Virtex4 FX12 Minimodule

Linux on Memec Virtex4 FX12 Minimodule

[Pawel P. Kusmierski]

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Dear friends,

I have a following problem:
I'm trying to boot linux kernel on a PowerPC405 inside a Virtex4 FX12
sitting on an Avnet/Memec FX12 Mini Module plugged into its mother board.
I was able to go as far as booting the kernel, mounting a nfs root,
as well as an ext2 one sitting on a sysace CF.
The problem is that the kernel stops outputting the following line:

Kernel panic - not syncing: No init found.  Try passing init= option to kernel.

Now, I know the init is being found, both in ext2 and nfs setup, has the
right rights, and all. I tried supplying a simple printf C program as
init, even an assembly one, with one stupid syscall to write out a line,
with the very same effect.
I edited the init/main.c file around the run_init_process(), and modified it
to analyse the kernel_execve return value. The effects are:

Freeing unused kernel memory: 104k init
Failed to execute /sbin/init: -2 <4>: No such file or directory.
Failed to execute /etc/init: -14 <4>: Bad address.
Failed to execute /bin/init: -14 <4>: Bad address.
Failed to execute /bin/sh: -14 <4>: Bad address.
Kernel panic - not syncing: No init found.  Try passing init= option to kernel.

and after I deleted /sbin/init the effects were:

Failed to execute /sbin/init: -2 <4>: No such file or directory.
Failed to execute /etc/init: -2 <4>: No such file or directory.
Failed to execute /bin/init: -14 <4>: Bad address.
Failed to execute /bin/sh: -14 <4>: Bad address.

The interesting thing is, that in both cases /bin/init does not exist,
and /etc/init does.

Now am I searching already too low or yet too high?
I put my kernel configs, dmesgs and xparameters.h here:
http://keymaster.el-kfa.net/~loko/linux-ppc/

My kernel is pulled from git://git.xilinx.com/linux-2.6-xlnx.git
I'm using ARCH=ppc in the makefile and building both the kernel
and the apps (including the buildroot on the nfs and sysace)
using the same crosstool setup, gcc-3.4.5-glibc-2.3.6.

Many thanks in advance for your help.
-- 
Pawel Kusmierski
loko-r a.t el-kfa.net

RE: Linux on Memec Virtex4 FX12 Minimodule

[John Linn]

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Hi Pawel,

 

Sorry for the delay, I just missed this message.

 

You should really be building arch/powerpc not arch/ppc as no one is
going to support that.  I realize that's a pain, but arch/ppc has been
dead for about 6 months now.

 

http://xilinx.wikidot.com <http://xilinx.wikidot.com/>  has a lot more
information about building the kernel from our GIT tree.

 

You can also post to http://forums.xilinx.com
<http://forums.xilinx.com/>  in the Embedded Linux forum for more Xilinx
specific help.

 

I don't understand you're problem either, but I would try building 1st
with arch=powerpc and using the ramdisk image that we have on our wiki
to get a good baseline.  You'll need to generate a device tree for your
hardware platform but that's not too hard and is explained on the wiki
also.

 

Thanks,

John

 

 

________________________________

From: linuxppc-dev-bounces+john.linn=xilinx.com@ozlabs.org
[mailto:linuxppc-dev-bounces+john.linn=xilinx.com@ozlabs.org] On Behalf
Of Pawel P. Kusmierski
Sent: Tuesday, January 06, 2009 6:02 PM
To: linuxppc-dev@ozlabs.org
Subject: Linux on Memec Virtex4 FX12 Minimodule

 

 



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Re: Linux on Memec Virtex4 FX12 Minimodule

[Pawel P. Kusmierski]

John,

Thanks a lot for your reply.
I didn't nottice the http://xilinx.wikidot.com/ site before,
it looks very interesting.
I gave ARCH=powerpc a try, but it didn't even boot, so I guess
I'll try again with the site's guidance and more attention.

Kind regards,
-- 
Pawel P. Kusmierski
loko@el-kfa.net