In article <001401c5265b$c31c7a30$0e00a8c0@paq6>
locore64@alkyltechnology.com wrote:

> There is no need to invent mips64/ tree.

Well, OpenBSD removed arch/mips long ago, and then
pefo has revived it as arch/mips64 (because it no
longer has mips1 support?).

> As far as VM forces "index match rule" to all VA (including 2nd or more
> sharing VA) and PA, mixing KSEG access and VA access will make no
> virtual alias condition.

At least OpenBSD's pmap still have a bunch of cache flush ops
(even in pmap_zero_page() and pmap_copy_page()) to avold
virtual alias, so I guess their VM doesn't have the rule. (yet?)
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Izumi Tsutsui