> I agree.  To me there will be almost no differences in the sgimips tree,
> and a small set of changes in the mips tree.   It would be overkill to add
> an arch/mips64 since a lot of the functionality is already in arch/mips.
>
> More than likely we can solve it under arch/mips/mips64 which is the way
> the ARM port headed for the arm26/arm32 differences.

Forgot to mention the most obvious reason.  The mips64 changes could also
be of use to other ports that use the R4000 and higher processors (ARC,
PMAX, ALGOR etc) without duplicating their port trees!!

-- 
Wayne Knowles			NetBSD/mipsco port maintainer
wdk@netbsd.org			http://www.netbsd.org