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Author SHA1 Message Date
David S. Miller 25e5566ed3 [SPARC64]: Fix missing load-twin usage in Niagara-1 memcpy. 
For the case where the source is not aligned modulo 8
we don't use load-twins to suck the data in and this
kills performance since normal loads allocate in the
L1 cache (unlike load-twin) and thus big memcpys swipe
the entire L1 D-cache.

We need to allocate a register window to implement this
properly, but that actually simplifies a lot of things
as a nice side-effect.

Signed-off-by: David S. Miller <davem@davemloft.net>
 2007-10-02 01:03:09 -07:00
David S. Miller 0d4bc95b9c [SPARC64]: Fix some Niagara memcpy() bugs. 
We need to restore the %asi register properly.
For the kernel this means get_fs(), for user this
means ASI_PNF.

Also, NGcopy_to_user.S was including U3memcpy.S instead
of NGmemcpy.S, oops :-)

Signed-off-by: David S. Miller <davem@davemloft.net>
 2006-03-20 01:12:20 -08:00
David S. Miller 398d108308 [SPARC64]: Niagara optimized memcpy() and copy_{to,from}_user(). 
Signed-off-by: David S. Miller <davem@davemloft.net>
 2006-03-20 01:11:42 -08:00