1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __ASM_GENERIC_UNALIGNED_H
3#define __ASM_GENERIC_UNALIGNED_H
4
5/*
6 * This is the most generic implementation of unaligned accesses
7 * and should work almost anywhere.
8 */
9#include <linux/unaligned/packed_struct.h>
10#include <asm/byteorder.h>
11
12#define __get_unaligned_t(type, ptr) ({ \
13 const struct { type x; } __packed *__pptr = (typeof(__pptr))(ptr); \
14 __pptr->x; \
15})
16
17#define __put_unaligned_t(type, val, ptr) do { \
18 struct { type x; } __packed *__pptr = (typeof(__pptr))(ptr); \
19 __pptr->x = (val); \
20} while (0)
21
22#define get_unaligned(ptr) __get_unaligned_t(typeof(*(ptr)), (ptr))
23#define put_unaligned(val, ptr) __put_unaligned_t(typeof(*(ptr)), (val), (ptr))
24
25static inline u16 get_unaligned_le16(const void *p)
26{
27 return le16_to_cpu(__get_unaligned_t(__le16, p));
28}
29
30static inline u32 get_unaligned_le32(const void *p)
31{
32 return le32_to_cpu(__get_unaligned_t(__le32, p));
33}
34
35static inline u64 get_unaligned_le64(const void *p)
36{
37 return le64_to_cpu(__get_unaligned_t(__le64, p));
38}
39
40static inline void put_unaligned_le16(u16 val, void *p)
41{
42 __put_unaligned_t(__le16, cpu_to_le16(val), p);
43}
44
45static inline void put_unaligned_le32(u32 val, void *p)
46{
47 __put_unaligned_t(__le32, cpu_to_le32(val), p);
48}
49
50static inline void put_unaligned_le64(u64 val, void *p)
51{
52 __put_unaligned_t(__le64, cpu_to_le64(val), p);
53}
54
55static inline u16 get_unaligned_be16(const void *p)
56{
57 return be16_to_cpu(__get_unaligned_t(__be16, p));
58}
59
60static inline u32 get_unaligned_be32(const void *p)
61{
62 return be32_to_cpu(__get_unaligned_t(__be32, p));
63}
64
65static inline u64 get_unaligned_be64(const void *p)
66{
67 return be64_to_cpu(__get_unaligned_t(__be64, p));
68}
69
70static inline void put_unaligned_be16(u16 val, void *p)
71{
72 __put_unaligned_t(__be16, cpu_to_be16(val), p);
73}
74
75static inline void put_unaligned_be32(u32 val, void *p)
76{
77 __put_unaligned_t(__be32, cpu_to_be32(val), p);
78}
79
80static inline void put_unaligned_be64(u64 val, void *p)
81{
82 __put_unaligned_t(__be64, cpu_to_be64(val), p);
83}
84
85static inline u32 __get_unaligned_be24(const u8 *p)
86{
87 return p[0] << 16 | p[1] << 8 | p[2];
88}
89
90static inline u32 get_unaligned_be24(const void *p)
91{
92 return __get_unaligned_be24(p);
93}
94
95static inline u32 __get_unaligned_le24(const u8 *p)
96{
97 return p[0] | p[1] << 8 | p[2] << 16;
98}
99
100static inline u32 get_unaligned_le24(const void *p)
101{
102 return __get_unaligned_le24(p);
103}
104
105static inline void __put_unaligned_be24(const u32 val, u8 *p)
106{
107 *p++ = val >> 16;
108 *p++ = val >> 8;
109 *p++ = val;
110}
111
112static inline void put_unaligned_be24(const u32 val, void *p)
113{
114 __put_unaligned_be24(val, p);
115}
116
117static inline void __put_unaligned_le24(const u32 val, u8 *p)
118{
119 *p++ = val;
120 *p++ = val >> 8;
121 *p++ = val >> 16;
122}
123
124static inline void put_unaligned_le24(const u32 val, void *p)
125{
126 __put_unaligned_le24(val, p);
127}
128
129static inline void __put_unaligned_be48(const u64 val, u8 *p)
130{
131 *p++ = val >> 40;
132 *p++ = val >> 32;
133 *p++ = val >> 24;
134 *p++ = val >> 16;
135 *p++ = val >> 8;
136 *p++ = val;
137}
138
139static inline void put_unaligned_be48(const u64 val, void *p)
140{
141 __put_unaligned_be48(val, p);
142}
143
144static inline u64 __get_unaligned_be48(const u8 *p)
145{
146 return (u64)p[0] << 40 | (u64)p[1] << 32 | (u64)p[2] << 24 |
147 p[3] << 16 | p[4] << 8 | p[5];
148}
149
150static inline u64 get_unaligned_be48(const void *p)
151{
152 return __get_unaligned_be48(p);
153}
154
155#endif /* __ASM_GENERIC_UNALIGNED_H */
156

source code of linux/include/asm-generic/unaligned.h