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
   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  /* _LINUX_IO_64_NONATOMIC_HI_LO_H_ */