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
8static 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
19static inline void lo_hi_writeq(__u64 val, volatile void __iomem *addr)
20{
21 writel(val, addr);
22 writel(val >> 32, addr + 4);
23}
24
25static 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
36static 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
60static inline u64 ioread64_lo_hi(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
73static 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
82static inline u64 ioread64be_lo_hi(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
95static 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