1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_IO_64_NONATOMIC_HI_LO_H_
3 #define _LINUX_IO_64_NONATOMIC_HI_LO_H_
6 #include <asm-generic/int-ll64.h>
8 static inline __u64 hi_lo_readq(const volatile void __iomem *addr)
10 const volatile u32 __iomem *p = addr;
16 return low + ((u64)high << 32);
19 static inline void hi_lo_writeq(__u64 val, volatile void __iomem *addr)
21 writel(val >> 32, addr + 4);
25 static inline __u64 hi_lo_readq_relaxed(const volatile void __iomem *addr)
27 const volatile u32 __iomem *p = addr;
30 high = readl_relaxed(p + 1);
31 low = readl_relaxed(p);
33 return low + ((u64)high << 32);
36 static inline void hi_lo_writeq_relaxed(__u64 val, volatile void __iomem *addr)
38 writel_relaxed(val >> 32, addr + 4);
39 writel_relaxed(val, addr);
43 #define readq hi_lo_readq
47 #define writeq hi_lo_writeq
51 #define readq_relaxed hi_lo_readq_relaxed
54 #ifndef writeq_relaxed
55 #define writeq_relaxed hi_lo_writeq_relaxed
58 #endif /* _LINUX_IO_64_NONATOMIC_HI_LO_H_ */