include/asm-generic/io-64-nonatomic-hi-lo.h

   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 #ifndef readq
   8 static inline __u64 readq(const volatile void __iomem *addr)
   9 {
  10         const volatile u32 __iomem *p = addr;
  11         u32 low, high;
  12
  13         high = readl(p + 1);
  14         low = readl(p);
  15
  16         return low + ((u64)high << 32);
  17 }
  18 #endif
  19
  20 #ifndef writeq
  21 static inline void writeq(__u64 val, volatile void __iomem *addr)
  22 {
  23         writel(val >> 32, addr + 4);
  24         writel(val, addr);
  25 }
  26 #endif
  27
  28 #endif  /* _ASM_IO_64_NONATOMIC_HI_LO_H_ */