1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_IO_64_NONATOMIC_LO_HI_H_
3 #define _LINUX_IO_64_NONATOMIC_LO_HI_H_
4
5 #include <linux/io.h>
6 #include <asm-generic/int-ll64.h>
7
lo_hi_readq(const volatile void __iomem * addr)8 static inline __u64 lo_hi_readq(const volatile void __iomem *addr)
9 {
10 const volatile u32 __iomem *p = addr;
11 u32 low, high;
12
13 low = readl(p);
14 high = readl(p + 1);
15
16 return low + ((u64)high << 32);
17 }
18
lo_hi_writeq(__u64 val,volatile void __iomem * addr)19 static inline void lo_hi_writeq(__u64 val, volatile void __iomem *addr)
20 {
21 writel(val, addr);
22 writel(val >> 32, addr + 4);
23 }
24
lo_hi_readq_relaxed(const volatile void __iomem * addr)25 static inline __u64 lo_hi_readq_relaxed(const volatile void __iomem *addr)
26 {
27 const volatile u32 __iomem *p = addr;
28 u32 low, high;
29
30 low = readl_relaxed(p);
31 high = readl_relaxed(p + 1);
32
33 return low + ((u64)high << 32);
34 }
35
lo_hi_writeq_relaxed(__u64 val,volatile void __iomem * addr)36 static inline void lo_hi_writeq_relaxed(__u64 val, volatile void __iomem *addr)
37 {
38 writel_relaxed(val, addr);
39 writel_relaxed(val >> 32, addr + 4);
40 }
41
42 #ifndef readq
43 #define readq lo_hi_readq
44 #endif
45
46 #ifndef writeq
47 #define writeq lo_hi_writeq
48 #endif
49
50 #ifndef readq_relaxed
51 #define readq_relaxed lo_hi_readq_relaxed
52 #endif
53
54 #ifndef writeq_relaxed
55 #define writeq_relaxed lo_hi_writeq_relaxed
56 #endif
57
58 #ifndef ioread64_lo_hi
59 #define ioread64_lo_hi ioread64_lo_hi
ioread64_lo_hi(const void __iomem * addr)60 static inline u64 ioread64_lo_hi(const void __iomem *addr)
61 {
62 u32 low, high;
63
64 low = ioread32(addr);
65 high = ioread32(addr + sizeof(u32));
66
67 return low + ((u64)high << 32);
68 }
69 #endif
70
71 #ifndef iowrite64_lo_hi
72 #define iowrite64_lo_hi iowrite64_lo_hi
iowrite64_lo_hi(u64 val,void __iomem * addr)73 static inline void iowrite64_lo_hi(u64 val, void __iomem *addr)
74 {
75 iowrite32(val, addr);
76 iowrite32(val >> 32, addr + sizeof(u32));
77 }
78 #endif
79
80 #ifndef ioread64be_lo_hi
81 #define ioread64be_lo_hi ioread64be_lo_hi
ioread64be_lo_hi(const void __iomem * addr)82 static inline u64 ioread64be_lo_hi(const void __iomem *addr)
83 {
84 u32 low, high;
85
86 low = ioread32be(addr + sizeof(u32));
87 high = ioread32be(addr);
88
89 return low + ((u64)high << 32);
90 }
91 #endif
92
93 #ifndef iowrite64be_lo_hi
94 #define iowrite64be_lo_hi iowrite64be_lo_hi
iowrite64be_lo_hi(u64 val,void __iomem * addr)95 static inline void iowrite64be_lo_hi(u64 val, void __iomem *addr)
96 {
97 iowrite32be(val, addr + sizeof(u32));
98 iowrite32be(val >> 32, addr);
99 }
100 #endif
101
102 #ifndef ioread64
103 #define ioread64_is_nonatomic
104 #define ioread64 ioread64_lo_hi
105 #endif
106
107 #ifndef iowrite64
108 #define iowrite64_is_nonatomic
109 #define iowrite64 iowrite64_lo_hi
110 #endif
111
112 #ifndef ioread64be
113 #define ioread64be_is_nonatomic
114 #define ioread64be ioread64be_lo_hi
115 #endif
116
117 #ifndef iowrite64be
118 #define iowrite64be_is_nonatomic
119 #define iowrite64be iowrite64be_lo_hi
120 #endif
121
122 #endif /* _LINUX_IO_64_NONATOMIC_LO_HI_H_ */
123