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authorRussell King <rmk+kernel@arm.linux.org.uk>2015-05-07 14:22:40 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2015-05-08 10:42:34 +0100
commit7ddfe625cbc14c83153c78aacd52a20c5805920e (patch)
tree7c83f76f042609dcc8ad8bd221a738eaad3d79ab /arch/arm
parent7d485f647c1f4a6976264c90447fb0dbf07b111d (diff)
ARM: optimize memset_io()/memcpy_fromio()/memcpy_toio()
If we are building for a LE platform, and we haven't overriden the MMIO ops, then we can optimize the mem*io operations using the standard string functions. Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/include/asm/io.h25
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h
index 7744e58bca38..addfb3dd095f 100644
--- a/arch/arm/include/asm/io.h
+++ b/arch/arm/include/asm/io.h
@@ -23,6 +23,7 @@
#ifdef __KERNEL__
+#include <linux/string.h>
#include <linux/types.h>
#include <linux/blk_types.h>
#include <asm/byteorder.h>
@@ -316,9 +317,33 @@ extern void _memset_io(volatile void __iomem *, int, size_t);
#define writesw(p,d,l) __raw_writesw(p,d,l)
#define writesl(p,d,l) __raw_writesl(p,d,l)
+#ifndef __ARMBE__
+static inline void memset_io(volatile void __iomem *dst, unsigned c,
+ size_t count)
+{
+ memset((void __force *)dst, c, count);
+}
+#define memset_io(dst,c,count) memset_io(dst,c,count)
+
+static inline void memcpy_fromio(void *to, const volatile void __iomem *from,
+ size_t count)
+{
+ memcpy(to, (const void __force *)from, count);
+}
+#define memcpy_fromio(to,from,count) memcpy_fromio(to,from,count)
+
+static inline void memcpy_toio(volatile void __iomem *to, const void *from,
+ size_t count)
+{
+ memcpy((void __force *)to, from, count);
+}
+#define memcpy_toio(to,from,count) memcpy_toio(to,from,count)
+
+#else
#define memset_io(c,v,l) _memset_io(c,(v),(l))
#define memcpy_fromio(a,c,l) _memcpy_fromio((a),c,(l))
#define memcpy_toio(c,a,l) _memcpy_toio(c,(a),(l))
+#endif
#endif /* readl */