:
:No. bzero() and bcopy() are for handling ordinary memory. There is no
:proper way to volatilize them without pessimizing them. Adding volatile
:to their prototypes won't actually make them handle volatile memory; it
:just breaks the warnings. Some of the i586-optimized versions in fact
:don't handle volatile memory properly - they do things like reading some
:locations twice to prefetch the cache lines. Even ordinary bcopy() via
:movsl accesses memory backwards in some cases.
:
:Drivers should use the bus access macros.
:
:Bruce
Hmmm.. quite a bit more work.
-Matt
Matthew Dillon
<dil...@backplane.com>
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