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csky: optimize memcpy_{from,to}io() and memset_io()
authorGuo Ren <guoren@linux.alibaba.com>
Wed, 6 Apr 2022 13:32:22 +0000 (21:32 +0800)
committerGuo Ren <guoren@linux.alibaba.com>
Mon, 18 Apr 2022 13:23:55 +0000 (21:23 +0800)
commit0d3efcc40e5c7beed1ed0219f11cf1fc55c9ea2e
tree0072d121bd5f7b4d5615e72a34d0b6ebb9841a98tree | snapshot
parentfdd0de000fd13e77911a3279d03555dbb6be2da6commit | diff
csky: optimize memcpy_{from,to}io() and memset_io()

Optimize memcpy_{from,to}io() and memset_io() by transferring in
64 bit as much as possible with minimized barrier usage.  This
simplest optimization brings faster throughput compare to current
byte-by-byte read and write with barrier in the loop. Code's
skeleton is taken from the powerpc & arm64.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
arch/csky/include/asm/io.h diff | blob | history
arch/csky/kernel/Makefile diff | blob | history
arch/csky/kernel/io.c [new file with mode: 0644] blob
Linux Kernel Source Tree.