https://github.com/torvalds/linux
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Tip revision: f8f5701bdaf9134b1f90e5044a82c66324d2073f authored by Linus Torvalds on 03 June 2012, 01:29:26 UTC
Linux 3.5-rc1
Tip revision: f8f5701
io-64-nonatomic-hi-lo.h
#ifndef _ASM_IO_64_NONATOMIC_HI_LO_H_
#define _ASM_IO_64_NONATOMIC_HI_LO_H_

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

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

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

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

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

#endif	/* _ASM_IO_64_NONATOMIC_HI_LO_H_ */
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