[U-Boot] [PATCH] ARM: Generic cache ops skeleton

Mike Frysinger vapier at gentoo.org
Mon Nov 7 02:09:08 CET 2011


On Sunday 06 November 2011 14:29:47 Simon Glass wrote:
> On this particular patch, I feel it should be more explicit about L1
> cache, which is what I think it deals with. We may want to support L2
> also through a similar API. And a CONFIG option is a good idea.

the point of flushing caches is to make the memory coherent to other devices 
(like peripherals).  we don't differentiate between the cache levels.

> Finally, even the CP15/cache/MMU code is duplicated in different
> arch/arm/cpu subdirs. Can we unify this a bit?

things should be separated based on core and system levels.  the fact that a 
particular SoC is say armv4 doesn't mean it should have armv4 specific 
cache/mmu handling in its SoC subdir.  i think the Linux arm tree is properly 
separating things.
-mike
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