1 /* SPDX-License-Identifier: GPL-2.0 */
2 // Copyright (C) 2005-2017 Andes Technology Corporation
3
4 #ifndef __ASM_NDS32_IO_H
5 #define __ASM_NDS32_IO_H
6
7 #include <linux/types.h>
8
9 extern void iounmap(volatile void __iomem *addr);
10 #define __raw_writeb __raw_writeb
11 static inline void __raw_writeb(u8 val, volatile void __iomem *addr)
12 {
13 asm volatile("sbi %0, [%1]" : : "r" (val), "r" (addr));
14 }
15
16 #define __raw_writew __raw_writew
17 static inline void __raw_writew(u16 val, volatile void __iomem *addr)
18 {
19 asm volatile("shi %0, [%1]" : : "r" (val), "r" (addr));
20 }
21
22 #define __raw_writel __raw_writel
23 static inline void __raw_writel(u32 val, volatile void __iomem *addr)
24 {
25 asm volatile("swi %0, [%1]" : : "r" (val), "r" (addr));
26 }
27
28 #define __raw_readb __raw_readb
29 static inline u8 __raw_readb(const volatile void __iomem *addr)
30 {
31 u8 val;
32
33 asm volatile("lbi %0, [%1]" : "=r" (val) : "r" (addr));
34 return val;
35 }
36
37 #define __raw_readw __raw_readw
38 static inline u16 __raw_readw(const volatile void __iomem *addr)
39 {
40 u16 val;
41
42 asm volatile("lhi %0, [%1]" : "=r" (val) : "r" (addr));
43 return val;
44 }
45
46 #define __raw_readl __raw_readl
47 static inline u32 __raw_readl(const volatile void __iomem *addr)
48 {
49 u32 val;
50
51 asm volatile("lwi %0, [%1]" : "=r" (val) : "r" (addr));
52 return val;
53 }
54
55 #define __iormb() rmb()
56 #define __iowmb() wmb()
57
58 /*
59 * {read,write}{b,w,l,q}_relaxed() are like the regular version, but
60 * are not guaranteed to provide ordering against spinlocks or memory
61 * accesses.
62 */
63
64 #define readb_relaxed(c) ({ u8 __v = __raw_readb(c); __v; })
65 #define readw_relaxed(c) ({ u16 __v = le16_to_cpu((__force __le16)__raw_readw(c)); __v; })
66 #define readl_relaxed(c) ({ u32 __v = le32_to_cpu((__force __le32)__raw_readl(c)); __v; })
67 #define writeb_relaxed(v,c) ((void)__raw_writeb((v),(c)))
68 #define writew_relaxed(v,c) ((void)__raw_writew((__force u16)cpu_to_le16(v),(c)))
69 #define writel_relaxed(v,c) ((void)__raw_writel((__force u32)cpu_to_le32(v),(c)))
70
71 /*
72 * {read,write}{b,w,l,q}() access little endian memory and return result in
73 * native endianness.
74 */
75 #define readb(c) ({ u8 __v = readb_relaxed(c); __iormb(); __v; })
76 #define readw(c) ({ u16 __v = readw_relaxed(c); __iormb(); __v; })
77 #define readl(c) ({ u32 __v = readl_relaxed(c); __iormb(); __v; })
78
79 #define writeb(v,c) ({ __iowmb(); writeb_relaxed((v),(c)); })
80 #define writew(v,c) ({ __iowmb(); writew_relaxed((v),(c)); })
81 #define writel(v,c) ({ __iowmb(); writel_relaxed((v),(c)); })
82 #include <asm-generic/io.h>
83 #endif /* __ASM_NDS32_IO_H */
84
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