1 /* SPDX-License-Identifier: GPL-2.0+ */
2
3 #ifndef _LINUX_IO_H
4 #define _LINUX_IO_H
5
6 #include <linux/compiler.h>
7 #include <linux/types.h>
8 #include <asm/io.h>
9
10 #ifndef CONFIG_HAVE_ARCH_IOMAP
ioread8(const volatile void __iomem * addr)11 static inline u8 ioread8(const volatile void __iomem *addr)
12 {
13 return readb(addr);
14 }
15
ioread16(const volatile void __iomem * addr)16 static inline u16 ioread16(const volatile void __iomem *addr)
17 {
18 return readw(addr);
19 }
20
ioread32(const volatile void __iomem * addr)21 static inline u32 ioread32(const volatile void __iomem *addr)
22 {
23 return readl(addr);
24 }
25 #endif /* !CONFIG_HAVE_ARCH_IOMAP */
26
27 #ifdef CONFIG_64BIT
ioread64(const volatile void __iomem * addr)28 static inline u64 ioread64(const volatile void __iomem *addr)
29 {
30 return readq(addr);
31 }
32 #endif /* CONFIG_64BIT */
33
34 #ifndef CONFIG_HAVE_ARCH_IOMAP
iowrite8(u8 value,volatile void __iomem * addr)35 static inline void iowrite8(u8 value, volatile void __iomem *addr)
36 {
37 writeb(value, addr);
38 }
39
iowrite16(u16 value,volatile void __iomem * addr)40 static inline void iowrite16(u16 value, volatile void __iomem *addr)
41 {
42 writew(value, addr);
43 }
44
iowrite32(u32 value,volatile void __iomem * addr)45 static inline void iowrite32(u32 value, volatile void __iomem *addr)
46 {
47 writel(value, addr);
48 }
49 #endif /* !CONFIG_HAVE_ARCH_IOMAP */
50
51 #ifdef CONFIG_64BIT
iowrite64(u64 value,volatile void __iomem * addr)52 static inline void iowrite64(u64 value, volatile void __iomem *addr)
53 {
54 writeq(value, addr);
55 }
56 #endif /* CONFIG_64BIT */
57
58 #ifndef CONFIG_HAVE_ARCH_IOREMAP
ioremap(resource_size_t offset,resource_size_t size)59 static inline void __iomem *ioremap(resource_size_t offset,
60 resource_size_t size)
61 {
62 return (void __iomem *)(unsigned long)offset;
63 }
64
iounmap(void __iomem * addr)65 static inline void iounmap(void __iomem *addr)
66 {
67 }
68 #endif
69
70 #define devm_ioremap(dev, offset, size) ioremap(offset, size)
71
72 #endif /* _LINUX_IO_H */
73