> The Alpha pmap does use a 3-level table in the pmap module itself, and 
> uses KSEG to access those pages.  That could prove a bad strategy with 
> MIPS, since you could end up with incompatible virtual aliases (KSEG 
> address vs. VPT address).

Yah, that's the case.  Alpha team never tried to step across VIPT.

Toru Nishimura/ALKYL Technology