Interesting,
> Atsushi Nemoto (anemo@mba.ocn.ne.jp) writes:
>
> > 20KC Users Manual says it has physically indexed data cache.
>
> That's correct.
>
> > For other MIPS64 core, 5Kc has virtually indexed cache.
>
> Yes.
>
> > How about 25KF?
>
> Physically indexed, it's a descendent of the 20Kc core.
When Yoichi said
> 25Kf also has virtually indexed cache
I assume s/he meant the I-cache.
Here is the official MIPS Technologies line (and we kind of ought to know):
o The 25KF D-cache is physically indexed (and of course
physically tagged).
o The 25KF I-cache is virtually indexed and virtually tagged - the tag
includes the ASID to reduce the number of occasions on which you
have to invalidate all the lines from a particular process.
o A 25KF secondary cache, if provided, is physically indexed and
tagged.
--
Dominic Sweetman,
MIPS Technologies (UK)
The Fruit Farm, Ely Road, Chittering, CAMBS CB5 9PH, ENGLAND
phone: +44 1223 706205 / fax: +44 1223 706250 / swbrd: +44 1223 706200
http://www.mips.com
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