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Christoph Hellwig2f8e2c82015-08-28 09:27:14 +02001#ifndef _LINUX_IO_64_NONATOMIC_LO_HI_H_
2#define _LINUX_IO_64_NONATOMIC_LO_HI_H_
Hitoshi Mitake797a7962012-02-07 11:45:33 +09003
4#include <linux/io.h>
5#include <asm-generic/int-ll64.h>
6
Jason Baron3a044172014-07-04 13:27:04 +02007static inline __u64 lo_hi_readq(const volatile void __iomem *addr)
Hitoshi Mitake797a7962012-02-07 11:45:33 +09008{
9 const volatile u32 __iomem *p = addr;
10 u32 low, high;
11
12 low = readl(p);
13 high = readl(p + 1);
14
15 return low + ((u64)high << 32);
16}
Hitoshi Mitake797a7962012-02-07 11:45:33 +090017
Jason Baron3a044172014-07-04 13:27:04 +020018static inline void lo_hi_writeq(__u64 val, volatile void __iomem *addr)
Hitoshi Mitake797a7962012-02-07 11:45:33 +090019{
20 writel(val, addr);
21 writel(val >> 32, addr + 4);
22}
Jason Baron3a044172014-07-04 13:27:04 +020023
Robin Murphye5112672016-04-26 11:38:20 +010024static inline __u64 lo_hi_readq_relaxed(const volatile void __iomem *addr)
25{
26 const volatile u32 __iomem *p = addr;
27 u32 low, high;
28
29 low = readl_relaxed(p);
30 high = readl_relaxed(p + 1);
31
32 return low + ((u64)high << 32);
33}
34
35static inline void lo_hi_writeq_relaxed(__u64 val, volatile void __iomem *addr)
36{
37 writel_relaxed(val, addr);
38 writel_relaxed(val >> 32, addr + 4);
39}
40
Jason Baron3a044172014-07-04 13:27:04 +020041#ifndef readq
42#define readq lo_hi_readq
43#endif
44
45#ifndef writeq
46#define writeq lo_hi_writeq
Hitoshi Mitake797a7962012-02-07 11:45:33 +090047#endif
48
Robin Murphye5112672016-04-26 11:38:20 +010049#ifndef readq_relaxed
50#define readq_relaxed lo_hi_readq_relaxed
51#endif
52
53#ifndef writeq_relaxed
54#define writeq_relaxed lo_hi_writeq_relaxed
55#endif
56
Christoph Hellwig2f8e2c82015-08-28 09:27:14 +020057#endif /* _LINUX_IO_64_NONATOMIC_LO_HI_H_ */