On Thu, 11 Jul 2002, Ralf Baechle wrote: > The R3000 cache manipulation mechanism is implemented by giving magic > meaning to store instruction while the isolate cache and swap cache bits > are in use. By their very implementation they're both incompatible with > normal operation of caches and therefore can only be used from uncached > space. Well, docs state only the cache that acts as the D-cache gets isolated and the one that acts as the I-cache always functions normally (and the real D-cache has all the logic needed to pretend it's an I-cache successfully). Thus running from an uncached space is not needed. I haven't checked it explicitly, but the flushing functions would fail (hang) quite soon otherwise and they don't. -- + Maciej W. Rozycki, Technical University of Gdansk, Poland + +--------------------------------------------------------------+ + e-mail: macro@ds2.pg.gda.pl, PGP key available +
