Re: Linux Kernel Hang or stop after uncompressing MPC8245

[mustang4@free.fr]

Thanks Willy,

So i just compile a new Kernel with options we have talking about...
And it's freeze, nothing to the console...

So i need to find the way to enable the Level-Triggered Interrupts in the kernel
to the right IRQ address...
I read the thread... but i can't find the thing to change in kernel source or
kernel configuration.

Or perhaps i enable to many option in
"Device Drivers  --->" "Character devices-->" "Serial drivers  --->"
<*> 8250/16550 and compatible serial support                     x x
  x x    [*]   Console on 8250/16550 and compatible serial port           x x
  x x    (4)   Maximum number of non-legacy 8250/16550 serial ports       x x
  x x    [*]   Extended 8250/16550 serial driver options                  x x
  x x    [*]     Support more than 4 legacy serial ports                  x x
  x x    [*]     Support for sharing serial interrupts                    x x
  x x    [ ]     Autodetect IRQ on standard ports (unsafe)                x x
  x x    [*]     Support special multiport boards                         x x
  x x    [*]     Support RSA serial ports

Try autodetect IRQ ?
I'll try to learn more about  edge/level irq sharing...

Yann

> Hi,
>
> On Mon, Aug 15, 2005 at 06:56:42PM +0200, mustang4@free.fr wrote:
> > Hi,
>
> > 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
>
> Have you read this thread ?
>
>   http://ozlabs.org/pipermail/linuxppc-embedded/2005-August/019482.html
>
> It discusses your about your board, on which interrupts must be set to LEVEL
> and not EDGE. BTW, they also used 8250. I don't know how you have to
> configure
> the serial ports though.
>
> This boot log also confirms that you have to use 8250/16550 :
>
>   http://mhonarc.axis.se/jffs-dev/msg01350.html
>
> > >   - 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
> ?
>
> It's not necessarily a default option. There are many console and serial
> ports combination available. BTW, you could also try netconsole which will
> send you the console data over an ethernet port if you cannot get the serial
> to work.
>
> > >   - 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;
>
> ok.
>
> > Another option i set :
> >  Default bootloader kernel arguments  x x  x x(console=ttyS0,9600
> console=tty0
>
> ok.
>
> Regards,
> Willy
>
>