[coreboot] Cache aliasing

ron minnich rminnich at gmail.com
Wed Apr 8 17:06:37 CEST 2009

On Wed, Apr 8, 2009 at 8:03 AM, Carl-Daniel Hailfinger
<c-d.hailfinger.devel.2006 at gmx.net> wrote:

> If all of the above is true, it should be possible to use CAR on every
> processor which has a fine-grained memory range cache control like MTRR.
> Simply make sure the cacheable area is smaller than cache size and
> smaller than the minimum aliasing distance, switch caches on and be
> happy. (External hardware may need to be told it should not trigger
> invalidation.)
> Is it really that easy?

Eswar, the guy who got us over the hard parts of CAR, indicated that
it was really that easy; that all you needed to know about CAR was in
Vol. III, you just had to know how to read it (in particular, that CD
does not mean Cache Disable).


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