Re: Linux Kernel Hang or stop after uncompressing MPC8245

[mustang4@free.fr]

Hi,

> 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 ?

I enable and build my kernel with driver (staticly):

Multi-IO cards (parallel and serial) (in Device Drivers-> Parallel port support 
)

This is what my board say (in console mode) about serial address:
0x08 COM1             DUART8245    0xfc004500 0x07a12000 0x00000001 0x01effc70
0x09 COM2             DUART8245    0xfc004600 0x07a12000 0x00000001 0x01e107d0


>   - are you sure that you enabled "console on serial port" in the config ?
Yes, i enable " Support for console on virtual terminal" but i enable
"Non-standard serial port support" option too...
So i recompile without the last one... and i recompile "with Serial drivers
--->" "[*]   Console on 8250/16550 and compatible serial port" perhaps it's
that... And i came back to you.
But, perhaps i've allready tested... i ll check.. it's not a default option ?

>   - 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)
I pass parameter directly to the kernel;

Another option i set :
 Default bootloader kernel arguments  x x  x x(console=ttyS0,9600 console=tty0


Thanks

Yann.

>   - is it possible that you have trouble with the endianness of the image ?
>     example: little endian image loaded on big endian CPU ?

My image seems to be ok...

>
> 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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