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_
4 
5 #include <linux/io.h>
6 #include <asm-generic/int-ll64.h>
7 
hi_lo_readq(const volatile void __iomem * addr)8 static inline __u64 hi_lo_readq(const volatile void __iomem *addr)
9 {
10 	const volatile u32 __iomem *p = addr;
11 	u32 low, high;
12 
13 	high = readl(p + 1);
14 	low = readl(p);
15 
16 	return low + ((u64)high << 32);
17 }
18 
hi_lo_writeq(__u64 val,volatile void __iomem * addr)19 static inline void hi_lo_writeq(__u64 val, volatile void __iomem *addr)
20 {
21 	writel(val >> 32, addr + 4);
22 	writel(val, addr);
23 }
24 
hi_lo_readq_relaxed(const volatile void __iomem * addr)25 static inline __u64 hi_lo_readq_relaxed(const volatile void __iomem *addr)
26 {
27 	const volatile u32 __iomem *p = addr;
28 	u32 low, high;
29 
30 	high = readl_relaxed(p + 1);
31 	low = readl_relaxed(p);
32 
33 	return low + ((u64)high << 32);
34 }
35 
hi_lo_writeq_relaxed(__u64 val,volatile void __iomem * addr)36 static inline void hi_lo_writeq_relaxed(__u64 val, volatile void __iomem *addr)
37 {
38 	writel_relaxed(val >> 32, addr + 4);
39 	writel_relaxed(val, addr);
40 }
41 
42 #ifndef readq
43 #define readq hi_lo_readq
44 #endif
45 
46 #ifndef writeq
47 #define writeq hi_lo_writeq
48 #endif
49 
50 #ifndef readq_relaxed
51 #define readq_relaxed hi_lo_readq_relaxed
52 #endif
53 
54 #ifndef writeq_relaxed
55 #define writeq_relaxed hi_lo_writeq_relaxed
56 #endif
57 
58 #ifndef ioread64_hi_lo
59 #define ioread64_hi_lo ioread64_hi_lo
ioread64_hi_lo(const void __iomem * addr)60 static inline u64 ioread64_hi_lo(const void __iomem *addr)
61 {
62 	u32 low, high;
63 
64 	high = ioread32(addr + sizeof(u32));
65 	low = ioread32(addr);
66 
67 	return low + ((u64)high << 32);
68 }
69 #endif
70 
71 #ifndef iowrite64_hi_lo
72 #define iowrite64_hi_lo iowrite64_hi_lo
iowrite64_hi_lo(u64 val,void __iomem * addr)73 static inline void iowrite64_hi_lo(u64 val, void __iomem *addr)
74 {
75 	iowrite32(val >> 32, addr + sizeof(u32));
76 	iowrite32(val, addr);
77 }
78 #endif
79 
80 #ifndef ioread64be_hi_lo
81 #define ioread64be_hi_lo ioread64be_hi_lo
ioread64be_hi_lo(const void __iomem * addr)82 static inline u64 ioread64be_hi_lo(const void __iomem *addr)
83 {
84 	u32 low, high;
85 
86 	high = ioread32be(addr);
87 	low = ioread32be(addr + sizeof(u32));
88 
89 	return low + ((u64)high << 32);
90 }
91 #endif
92 
93 #ifndef iowrite64be_hi_lo
94 #define iowrite64be_hi_lo iowrite64be_hi_lo
iowrite64be_hi_lo(u64 val,void __iomem * addr)95 static inline void iowrite64be_hi_lo(u64 val, void __iomem *addr)
96 {
97 	iowrite32be(val >> 32, addr);
98 	iowrite32be(val, addr + sizeof(u32));
99 }
100 #endif
101 
102 #ifndef ioread64
103 #define ioread64_is_nonatomic
104 #define ioread64 ioread64_hi_lo
105 #endif
106 
107 #ifndef iowrite64
108 #define iowrite64_is_nonatomic
109 #define iowrite64 iowrite64_hi_lo
110 #endif
111 
112 #ifndef ioread64be
113 #define ioread64be_is_nonatomic
114 #define ioread64be ioread64be_hi_lo
115 #endif
116 
117 #ifndef iowrite64be
118 #define iowrite64be_is_nonatomic
119 #define iowrite64be iowrite64be_hi_lo
120 #endif
121 
122 #endif	/* _LINUX_IO_64_NONATOMIC_HI_LO_H_ */
123