On Sat, Jan 30, 2010 at 11:02 AM, Garrett D'Amore <gdamore at sun.com> wrote: > On 01/29/10 11:34 PM, Cyril Plisko wrote: >> >> 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. >> > Okay, that makes sense. > > Anyone know if it is actually *used* by anything? ?Or is this just one of > those ideas that seemed great at the time but found little use? > > If anyone has ever found it useful, I'm inclined to leave it in the tree > until we finally gut sbus itself -- although I *suspect* that it may be > another whole release before we can do that. ?(Enterprise class systems > which are not yet EOSL have sbus on them. ?That said, it would appear that > the last of these reaches EOSL at the end of this year.) > > ? ?- Garrett > >>> >>> 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 >>>
Hello! I have here a PCI based UltraSPARC-5 based (and named) system here. Obviously this function doesn't relate to it, but does a similar function exist for much of the same functions? ----- Gregg C Levine gregg.drwho8 at gmail.com "This signature fought the Time Wars, time and again."
