Re: Linux Kernel Hang or stop after uncompressing MPC8245

[Willy Tarreau <willy@w.ods.org>]

Hello,

On Mon, Aug 15, 2005 at 06:10:13PM +0200, mustang4@free.fr wrote:
> 
> Hello,
> 
> I try to boot my linux kernel (with 2.4 or 2.6 it's the same problem) on an
> embeded board (EM04N MenMicro) base on a MPC8245 cpu...
> 
> When i boot i 've;
> 
> > Detected PPCBOOT header
> >     Verifying image CRC...ok
> >     Uncompressing Multi-File Image ... ok
> >     Moving initrd...ok
> >     Passing Kernel parameters: root=ramfs console=ttyS0,9600
> >     Starting Linux Kernel.
> >
> and stop here... i must hard reset the board...
> 
> Anyone boot a linux kernel on this board ?
> I heard about UART serial port problem with MPC8245 cpu, but i don't find a
> working solution for patching kernel or setting up correctly...

Although I don't know this board, here are a few questions :
  - are you sure that you enabled the correct serial driver and that it is
    linked to the zImage and not build as a module ?
  - are you sure that you enabled "console on serial port" in the config ?
  - how can you be certain that the serial will appear on ttyS0 and not ttyS1
    or another one (the kernel might detect another serial port which it
    assigns ttyS0)
  - is it possible that you have trouble with the endianness of the image ?
    example: little endian image loaded on big endian CPU ?

Regards,
Willy

> Anyone can help me ?
> 
> I use :
> ELDK kit cross compilation for PPC8245
> uBoot
> and official last kernel source...
> 
> Thanks
> -
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