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Re: Help with booting Linux off my Redboot prompt


You could try this :
exec -c "console=ttyS1,115200 root=/dev/mtdblock4 rw, mem=64M@0x00000000"

works for me on ixp425 based board.

Cheers,
Alfred



On Tue, 22 Feb 2005 09:56:06 -0800, Krishna Ganugapati
<krishnag@marakicorp.com> wrote:
> Thanks Nickolay
> 
> I did specify all four parameters to "exec" and while things do not dump
> core or anything -- it looks like its hanging somewhere in the Linux
> startup. I understand this may be the wrong place to pose the question, but
> has anyone used the BDI2000 to debug a Linux target after it has been
> invoked from Redboot using exec.
> 
> The BDI2000 documentation is pretty sparse.
> 
> I also discovered that the base address for the IXDP425 is 0x00600000 after
> greping through the sources.
> 
> My board only has UART 0 and I'm suspecting that it has something to do with
> how the Linux console works. I get no output to my console window once I
> invoke exec...
> 
> I need to figure out how to debug a Linux target under Redboot using a
> BDI2000
> 
> Thanks
> 
> Krishna
> 
> ----- Original Message -----
> From: "Nickolay" <nickolay@protei.ru>
> To: "Krishna Ganugapati" <krishnag@marakicorp.com>
> Cc: <ecos-discuss@ecos.sourceware.org>
> Sent: Tuesday, February 22, 2005 3:18 AM
> Subject: Re: [ECOS] Help with booting Linux off my Redboot prompt
> 
> > Krishna Ganugapati wrote:
> >
> >> I have successfully built redboot for my IXP425 - can load redboot image
> >> store it in flash, npe's work fine and I can successfully tftp images
> >> down to my board from by RedHat9 Linux box.
> >>
> >> I've built Linux kernels and a rootfs.
> >>
> >> My compressed Linux kernel is zImage
> >>
> >> and  my compressed rootfs is rootfs.gz
> >>
> >> I execute the following commands at my Redboot console
> >>
> >> a) load -r -v -b 0x00800000 rootfs.gz  ; load the rootfs.gz image @
> >> 0x0800000
> >>
> >> b) load -r -v -v 0x01600000 zImage  ;  load the compressed kernel zImage
> >> @ 0x01600000
> >>
> >> c) exec
> >>
> >> The resulting output is
> >> Using base address 0x01600000 and length 0x000b73c0 (which is the correct
> >> size of the image)
> >>
> >> However following that, I get nothing....
> >>
> >> Any ideas how I can debug further... or should I be taking this to
> >> another alias...
> >>
> >>
> >> Thanks!
> >>
> >> Krishna
> >
> > Try explicitly indicate what you want load from.
> > exec -b 0x01600000 -l 0 0x01600000
> >
> >
> >
> > --
> > Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
> > and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
> >
> 
> --
> Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
> and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
> 
>

-- 
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