sh: Provide uncached I/O helpers.

[pandora-kernel.git] / arch / sh / include / asm / io.h

diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h
index bd5fafa..7dab7b2 100644 (file)
--- a/arch/sh/include/asm/io.h
+++ b/arch/sh/include/asm/io.h
@@ -133,6 +133,28 @@ static inline void ctrl_delay(void)
        __raw_readw(generic_io_base);
 }
 
+#define __BUILD_UNCACHED_IO(bwlq, type)                                        \
+static inline type read##bwlq##_uncached(unsigned long addr)           \
+{                                                                      \
+       type ret;                                                       \
+       jump_to_uncached();                                             \
+       ret = __raw_read##bwlq(addr);                                   \
+       back_to_cached();                                               \
+       return ret;                                                     \
+}                                                                      \
+                                                                       \
+static inline void write##bwlq##_uncached(type v, unsigned long addr)  \
+{                                                                      \
+       jump_to_uncached();                                             \
+       __raw_write##bwlq(v, addr);                                     \
+       back_to_cached();                                               \
+}
+
+__BUILD_UNCACHED_IO(b, u8)
+__BUILD_UNCACHED_IO(w, u16)
+__BUILD_UNCACHED_IO(l, u32)
+__BUILD_UNCACHED_IO(q, u64)
+
 #define __BUILD_MEMORY_STRING(bwlq, type)                              \
                                                                        \
 static inline void __raw_writes##bwlq(volatile void __iomem *mem,      \