[linux-2.6-block.git] / include / linux / io-64-nonatomic-lo-hi.h

#ifndef _LINUX_IO_64_NONATOMIC_LO_HI_H_
#define _LINUX_IO_64_NONATOMIC_LO_HI_H_

#include <linux/io.h>
#include <asm-generic/int-ll64.h>

static inline __u64 lo_hi_readq(const volatile void __iomem *addr)
{
	const volatile u32 __iomem *p = addr;
	u32 low, high;

	low = readl(p);
	high = readl(p + 1);

	return low + ((u64)high << 32);
}

static inline void lo_hi_writeq(__u64 val, volatile void __iomem *addr)
{
	writel(val, addr);
	writel(val >> 32, addr + 4);
}

#ifndef readq
#define readq lo_hi_readq
#endif

#ifndef writeq
#define writeq lo_hi_writeq
#endif

#endif	/* _LINUX_IO_64_NONATOMIC_LO_HI_H_ */
Commit	Line	Data
2f8e2c87 CH	1	#ifndef _LINUX_IO_64_NONATOMIC_LO_HI_H_
2f8e2c87 CH	2	#define _LINUX_IO_64_NONATOMIC_LO_HI_H_
797a796a HM	3
	4	#include <linux/io.h>
	5	#include <asm-generic/int-ll64.h>
	6
3a044178	7	static inline __u64 lo_hi_readq(const volatile void __iomem *addr)
797a796a HM	8	{
	9	const volatile u32 __iomem *p = addr;
	10	u32 low, high;
	11
	12	low = readl(p);
	13	high = readl(p + 1);
	14
	15	return low + ((u64)high << 32);
	16	}
797a796a	17
3a044178	18	static inline void lo_hi_writeq(__u64 val, volatile void __iomem *addr)
797a796a HM	19	{
	20	writel(val, addr);
	21	writel(val >> 32, addr + 4);
	22	}
3a044178 JB	23
	24	#ifndef readq
	25	#define readq lo_hi_readq
	26	#endif
	27
	28	#ifndef writeq
	29	#define writeq lo_hi_writeq
797a796a HM	30	#endif
797a796a HM	31
2f8e2c87	32	#endif /* _LINUX_IO_64_NONATOMIC_LO_HI_H_ */