sh: add writesb(), readsb(), writesw() and readsw() to io.h

[Magnus D. <mag...@gm...>]

sh: add writesb(), readsb(), writesw() and readsw() to io.h

This patch adds inline versions of writesb(), readsb(), writesw() and readsw()
to include/asm-sh/io.h. Stolen from include/asm-avr32/io.h.

These functions are needed to compile certain device drivers such as ax88796.

Signed-off-by: Magnus Damm <da...@ig...>
---

 include/asm-sh/io.h |   26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

--- 0001/include/asm-sh/io.h
+++ work/include/asm-sh/io.h	2007-09-05 13:05:32.000000000 +0900
@@ -135,6 +135,32 @@ void __raw_readsl(unsigned long addr, vo
 # define writel(v,a)	({ __raw_writel((v),(a)); mb(); })
 #endif
 
+#define __BUILD_MEMORY_STRING(bwlq, type)				\
+									\
+static inline void writes##bwlq(volatile void __iomem *mem,		\
+				const void *addr, unsigned int count)	\
+{									\
+	const volatile type *__addr = addr;				\
+									\
+	while (count--) {						\
+		__raw_write##bwlq(*__addr, mem);			\
+		__addr++;						\
+	}								\
+}									\
+									\
+static inline void reads##bwlq(volatile void __iomem *mem, void *addr,	\
+			       unsigned int count)			\
+{									\
+	volatile type *__addr = addr;					\
+									\
+	while (count--) {						\
+		*__addr = __raw_read##bwlq(mem);			\
+		__addr++;						\
+	}								\
+}
+
+__BUILD_MEMORY_STRING(b, u8)
+__BUILD_MEMORY_STRING(w, u16)
 #define writesl __raw_writesl
 #define readsl  __raw_readsl