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

[Blue Swirl]

On Sun, Feb 26, 2012 at 21:52, Mark Cave-Ayland
<mark.cave-ayland at ilande.co.uk> 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.
>
>
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