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 #ifndef ioread64_hi_lo
59 #define ioread64_hi_lo ioread64_hi_lo
60 static inline u64 ioread64_hi_lo(void __iomem *addr)
64 high = ioread32(addr + sizeof(u32));
67 return low + ((u64)high << 32);
71 #ifndef iowrite64_hi_lo
72 #define iowrite64_hi_lo iowrite64_hi_lo
73 static inline void iowrite64_hi_lo(u64 val, void __iomem *addr)
75 iowrite32(val >> 32, addr + sizeof(u32));
80 #ifndef ioread64be_hi_lo
81 #define ioread64be_hi_lo ioread64be_hi_lo
82 static inline u64 ioread64be_hi_lo(void __iomem *addr)
86 high = ioread32be(addr);
87 low = ioread32be(addr + sizeof(u32));
89 return low + ((u64)high << 32);
93 #ifndef iowrite64be_hi_lo
94 #define iowrite64be_hi_lo iowrite64be_hi_lo
95 static inline void iowrite64be_hi_lo(u64 val, void __iomem *addr)
97 iowrite32be(val >> 32, addr);
98 iowrite32be(val, addr + sizeof(u32));
103 #define ioread64_is_nonatomic
104 #define ioread64 ioread64_hi_lo
108 #define iowrite64_is_nonatomic
109 #define iowrite64 iowrite64_hi_lo
113 #define ioread64be_is_nonatomic
114 #define ioread64be ioread64be_hi_lo
118 #define iowrite64be_is_nonatomic
119 #define iowrite64be iowrite64be_hi_lo
122 #endif /* _LINUX_IO_64_NONATOMIC_HI_LO_H_ */