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add cpu native ordered io accessors 

There are no generic native ordered io accessors. This sometimes
leads to

	v = in_be32(a);
	v = readl(a);

in generic drivers. Instead, use io accessors which are explicitely
native ordered.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2011-09-22 19:40:07 +02:00
parent d97b9ffdb3
commit 2e6a88f210
1 changed files with 17 additions and 0 deletions
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17
include/io.h
View File

@ -3,4 +3,21 @@
#include <asm/io.h>
/* cpu_read/cpu_write: cpu native io accessors */
#if __BYTE_ORDER == __BIG_ENDIAN
#define cpu_readb(a) readb(a)
#define cpu_readw(a) in_be16(a)
#define cpu_readl(a) in_be32(a)
#define cpu_writeb(v, a) writeb((v), (a))
#define cpu_writew(v, a) out_be16((a), (v))
#define cpu_writel(v, a) out_be32((a), (v))
#else
#define cpu_readb(a) readb(a)
#define cpu_readw(a) readw(a)
#define cpu_readl(a) readl(a)
#define cpu_writeb(v, a) writeb((v), (a))
#define cpu_writew(v, a) writew((v), (a))
#define cpu_writel(v, a) writel((v), (a))
#endif
#endif /* __IO_H */