Re: Regarding the booting the linux kernel on a > PPC board.

[Clemens Koller <clemens.koller@anagramm.de>]

Hi, Vinay!

You might want to turn on kernel debugging and also the
early printk support.

You also might want to come over to the linuxppc-embedded
and linuxppc-dev mailinglists at ozlabs.org where those question
are pretty well known. Tell us more about your board/system,
check the archives!

Greets,

Clemens Koller
_______________________________
R&D Imaging Devices
Anagramm GmbH
Rupert-Mayer-Str. 45/1
81379 Muenchen
Germany

http://www.anagramm.de
Phone: +49-89-741518-50
Fax: +49-89-741518-19

vinay hegde wrote:
> > Hi All,
> >
> > I am working on bringing up a PowerPC based board
> > with Linux 2.6 kernel (Board supoort package).
> > However, I am facing some problem with respect to
> > debugging.
> >
> > When I boot the board with the Linux kernel (BSP),
> > the board hangs after printing the following
> > information.
> >
> >
> > Network Loading from: /dev/enet0 
> >
> > Client IP Address      = 192.168.4.38 
> > Server IP Address      = 192.168.4.101 
> > Gateway IP Address     = 192.168.4.253 
> > Subnet IP Address Mask = 255.255.255.0 
> > Boot File Name         = developer.kdi 
> > Load Address           = 04000000 
> > Buffer Size = 2000000 
> >
> > Network Boot File Load Start - Press <ESC> to
> > Bypass, <SPC> to Continue 
> >
> >
> > Bytes Received =&6141952, Bytes Loaded =&6141952 
> > Bytes/Second   =&511829, Elapsed Time =12 Second(s) 
> >
> > Boot Device       =/dev/enet0 
> > Boot File         =developer.kdi 
> > Load Address      =04000000 
> > Load Size         =005DB800 
> > Execution Address =04000020 
> > Execution Offset  =00000020 
> >
> > Passing control to the loaded file/image. 
> > loaded at:     00800000 00DD8800 
> > zimage at:     008058E0 009933BB 
> > initrd at:     00998000 00DD8800 
> > avail ram:     00400000 00800000 
> >
> > Linux/PPC load: console=ttyS0,9600 console=tty0
> > root=/dev/sda2 
> > console=ttyS0,9600 root=/dev/ram rw 
> > Uncompressing Linux...done. 
> > Now booting the kernel 
> >
> >
> >
> > > > > > > > > > > > > > > > > > > > > > > . 
> >
> > I am going through the source code to figure out the
> > problem, but unable to find out what is going wrong
> > here.
> >
> > Does anybody have any idea about the problem? Also,
> > is it possible to print some debug messages at this
> > point of booting? {Note that, in the early stage of
> > booting process the serial is initialized and all
> > the above mentioned messages (like Uncomressing
> > Linux, Now booting the kernel etc) are printed. And
> > immediately after printing the "now booting the
> > kernel message,the serial is closed. This code is in
> > uncompress_kernel() function in
> > arch/ppc/boot/simple/misc.c file).
> >
> > Can somebody help me with the above problem?
> >
> > Thank you,
> >
> > vinay hegde.
>
>
>
>
> 	
>
> 	
> 		
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