[deliverable/linux.git] / include / asm-generic / 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>

static inline __u64 hi_lo_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);
}

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

#ifndef readq
#define readq hi_lo_readq
#endif

#ifndef writeq
#define writeq hi_lo_writeq
#endif

#endif	/* _ASM_IO_64_NONATOMIC_HI_LO_H_ */
Commit	Line	Data
	1	#ifndef _ASM_IO_64_NONATOMIC_HI_LO_H_
	2	#define _ASM_IO_64_NONATOMIC_HI_LO_H_
	3
	4	#include <linux/io.h>
	5	#include <asm-generic/int-ll64.h>
	6
	7	static inline __u64 hi_lo_readq(const volatile void __iomem *addr)
	8	{
	9	const volatile u32 __iomem *p = addr;
	10	u32 low, high;
	11
	12	high = readl(p + 1);
	13	low = readl(p);
	14
	15	return low + ((u64)high << 32);
	16	}
	17
	18	static inline void hi_lo_writeq(__u64 val, volatile void __iomem *addr)
	19	{
	20	writel(val >> 32, addr + 4);
	21	writel(val, addr);
	22	}
	23
	24	#ifndef readq
	25	#define readq hi_lo_readq
	26	#endif
	27
	28	#ifndef writeq
	29	#define writeq hi_lo_writeq
	30	#endif
	31
	32	#endif /* _ASM_IO_64_NONATOMIC_HI_LO_H_ */