On Thu, 16 Feb 2006, Ralf Baechle wrote: > That still leaves below gem to sort out. Yeah -- there is that mmiowb() macro that is supposed to fit here, but some MIPS-based hardware is ordered weakly (and strangely) enough for this single macro to be a bit insufficient. I think we should have at least mmiowb() and mmiob() (corresponding to wmb() and mb(), respectively) as there is a system we support that does writes in order, but snoops the writeback buffer (the R3220). Another one is worse yet as does all of that plus byte gathering (the R2020). At least the latter cannot have the NCR/Emulex SCSI chip and uses DEC's own design instead (a DC7061 gate array highly suspected to also support DSSI if appropriately configured). I'm not sure if we really need mmiorb() -- probably not. Maciej
