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kernel add
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#ifndef _LINUX_IO_64_NONATOMIC_HI_LO_H_
#define _LINUX_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 /* _LINUX_IO_64_NONATOMIC_HI_LO_H_ */
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