Re: Strange, strange occurence

[Atsushi Nemoto <anemo@mba.ocn.ne.jp>]

>>>>> On Wed, 14 Jul 2004 17:35:19 +0100, Dominic Sweetman <dom@mips.com> said:
dom> 2. Arrange to skip those indexes when zapping the cache, then do
dom> something weird to invalidate that handful of lines.  You could
dom> do that by running uncached, but you could also do it just by
dom> using some auxiliary routine which is known to be more than a
dom> cache line but much less than a whole I-cache span distant, so
dom> can't possibly alias to the same thing...

dom> This is fiddly, but not terribly difficult and should have a
dom> negligible performance impact.

Yes.  The cache routines for TX49XX surely do it (2 phase
invalidating).  Please look at tx49_blast_icache32() in c-r4k.c.

---
Atsushi Nemoto