Re: [OpenBIOS] SPARC64 device tree model - SBUS or PCI?

[Blue Swirl]

On Sun, Feb 26, 2012 at 21:52, Mark Cave-Ayland
 wrote:
> On 26/02/12 19:16, Tarl Neustaedter wrote:
> > > Here's prtconf output from my PCI-based SunFire V480:
> > >
> > > # prtconf [...]
> >
> > That gives you the Solaris view on the device tree, which is somewhat
> > different. A prtconf -pv gives the openboot view:
> >
> > % prtconf -pv
> > System Configuration: Sun Microsystems sun4u
> > Memory size: 2048 Megabytes
> > System Peripherals (PROM Nodes):
>
> (cut)
>
> Thanks Tarl, that was the output I was looking for. Andreas - sorry if I
> wasn't specific enough on this, I guess I'm not that familiar with these
> tools yet :/
>
> Hmmm so it looks like the serial port is connected via ebus on a PCI-based
> SPARC system. I've so far managed to cross-compile myself a -O0 -g 2.6.32
> Linux SPARC64 kernel so I can step things through to try and figure out why
> the kernel can't seem to write to the console when switching away from CIF
> to accessing the serial port directly...

Did you try -p or console=prom? Otherwise the kernel buffers the
messages until some console handover event, which could be too late.
> ATB,
>
> Mark.