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
hi_lo_readq(const volatile void __iomem * addr)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
hi_lo_writeq(__u64 val,volatile void __iomem * addr)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
hi_lo_readq_relaxed(const volatile void __iomem * addr)24 static inline __u64 hi_lo_readq_relaxed(const volatile void __iomem *addr)
25 {
26 const volatile u32 __iomem *p = addr;
27 u32 low, high;
28
29 high = readl_relaxed(p + 1);
30 low = readl_relaxed(p);
31
32 return low + ((u64)high << 32);
33 }
34
hi_lo_writeq_relaxed(__u64 val,volatile void __iomem * addr)35 static inline void hi_lo_writeq_relaxed(__u64 val, volatile void __iomem *addr)
36 {
37 writel_relaxed(val >> 32, addr + 4);
38 writel_relaxed(val, addr);
39 }
40
41 #ifndef readq
42 #define readq hi_lo_readq
43 #endif
44
45 #ifndef writeq
46 #define writeq hi_lo_writeq
47 #endif
48
49 #ifndef readq_relaxed
50 #define readq_relaxed hi_lo_readq_relaxed
51 #endif
52
53 #ifndef writeq_relaxed
54 #define writeq_relaxed hi_lo_writeq_relaxed
55 #endif
56
57 #endif /* _LINUX_IO_64_NONATOMIC_HI_LO_H_ */
58