On Sat, Jan 30, 2010 at 2:35 AM, Garrett D'Amore <gdamore at sun.com> wrote:
> Looking around at stale code (I'm weird), I see this sbusmem driver that
> seems to support a simple read/write function and devmap. ?No block device
> support, and most likely of limited value. ?I can't seem to find any use for
> it, and the sbus systems I can log into don't seem to actually have one of
> the necessary devices.
>
> I'm wondering if this is another legacy RAM expansion device from the old
> 32-bit sun4c/4m days that perhaps we can just remove?
That is not a a RAM driver of any sort. sbusmem allows you to mmap
your SBus card and to meddle in the cards registers.
Essentially it let you to have a userland driver for an arbitrary SBus card.
>
> Can anyone else enlighten me here? ?Is there some function that this thing
> still serves that I'm not aware of.
>
> (Yes, "sbus" systems are still in use... Sunfire/Campfire and Starfire
> systems are all Sbus, and there may be folks with Ultra-2's still using it
> as well.)
>
> ? ?- Garrett
>
--
Regards,
Cyril
