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From: "Ricardo Ayres Severo" <severo.ricardo@gmail.com>
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: Linux boot on a ppc 405
Date: Mon, 28 Jan 2008 20:53:19 -0200	[thread overview]
Message-ID: <5ee408090801281453l3e6fe3e5x2f8f1b0b130ad163@mail.gmail.com> (raw)
In-Reply-To: <fa686aa40801271315m5ba4ea08p913fd6235eb1d240@mail.gmail.com>

Grant,

my output is the following:

loaded at:     00400000 004E919C

board data at: 00000000 0000007C

relocated to:  00404040 004040BC

zimage at:     00404E2C 004E620A

avail ram:     004EA000 8DA05119


Linux/PPC load: console=ttyUL0,9600

Uncompressing Linux...done.

Now booting the kernel



nothing shows up next.
I tried to look at __log_buf but the debugger doesn't recognize it.
The debugger only knows the code of the part that boots the kernel.
I also tried setting ttyUL0 and ttyS0 for the linux console.
Any ideas of how I can get the real position of __log_buf?

Thanks,

On Jan 27, 2008 7:15 PM, Grant Likely <grant.likely@secretlab.ca> wrote:
> On 1/27/08, Ricardo Severo <severo.ricardo@gmail.com> wrote:
> > Hi all,
> >
> > I am working with a Xilinx Virtex II Pro  evaluation board, wich has two
> > PowerPC 405 and I'm trying to boot a vanilla linux kernel 2.6.23.14.
> > Until now I've manged to make it uncompress the kernel, but it doesn't boot.
> > My question is how the initial execution (the one who uncompresses the
> > kernel image) transfers the processor to the kernel itself. I've looked
> > in the arch/ppc/boot/simple/relocate.S code and it jumps to the position
> > 0x0 after uncompressing, is it right? The kernel is uncompressed at that
> > position?
>
> Post your output log please.
>
> If your getting a message that the kernel is uncompressing, but you
> don't have any output beyond that then most likely your console is not
> setup correctly.  If you've got a debugger, look at memory at the
> __log_buf location to see if there are any boot logs there.
>
> Cheers,
> g.
>
>
> --
> Grant Likely, B.Sc., P.Eng.
> Secret Lab Technologies Ltd.
>



-- 
Ricardo Ayres Severo <severo.ricardo@gmail.com>

  reply	other threads:[~2008-01-28 22:53 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-01-27 16:20 Linux boot on a ppc 405 Ricardo Severo
2008-01-27 18:29 ` David Baird
2008-01-27 21:15 ` Grant Likely
2008-01-28 22:53   ` Ricardo Ayres Severo [this message]
2008-01-28 22:55     ` Stephen Neuendorffer
2008-01-28 23:00       ` Ricardo Ayres Severo
2008-01-28 23:02         ` Stephen Neuendorffer
2008-01-28 23:04         ` Grant Likely

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