LXR linux/include/linux/io-64-nonatomic-hi-lo.h

   1#ifndef _LINUX_IO_64_NONATOMIC_HI_LO_H_
   2#define _LINUX_IO_64_NONATOMIC_HI_LO_H_
   3
   4#include <linux/io.h>
   5#include <asm-generic/int-ll64.h>
   6
   7static 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
  18static 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  /* _LINUX_IO_64_NONATOMIC_HI_LO_H_ */
  33