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

Blue Swirl blauwirbel at gmail.com
Sun Feb 26 22:53:52 CET 2012

On Sun, Feb 26, 2012 at 12:13, Mark Cave-Ayland
<mark.cave-ayland at ilande.co.uk> wrote:
> Hi all,
> I've been spending some time recently trying to figure out why the SPARC64
> serial console doesn't appear to work outside of OpenBIOS under QEMU, and so
> was looking at the example device trees in the Debian sparc-utils package.

Maybe on the real machine, serial console isn't using the 'su' devices
(PC serial) but 'se' device which does not exist in QEMU?

> Now AFAICT the examples/ultra2 file represents an Ultra 2 SBUS which is
> different from QEMU which I believe is attempting to emulate an Ultra 2 PCI
> (Sabre) system. I know there was some talk previously on the mailing list
> about which device model to use moving forward, but I don't remember a
> definite decision being made. If QEMU is going to continue to use a
> PCI-based system, does anyone have a copy of the prtconf output for such a
> system?

IIRC we discussed earlier about using Ultra 5 which doesn't have a SBus.

> ATB,
> Mark.
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