1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_UNALIGNED_GENERIC_H
3 #define _LINUX_UNALIGNED_GENERIC_H
5 #include <linux/types.h>
8 * Cause a link-time error if we try an unaligned access other than
9 * 1,2,4 or 8 bytes long
11 extern void __bad_unaligned_access_size(void);
13 #define __get_unaligned_le(ptr) ((__force typeof(*(ptr)))({ \
14 __builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \
15 __builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_le16((ptr)), \
16 __builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_le32((ptr)), \
17 __builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_le64((ptr)), \
18 __bad_unaligned_access_size())))); \
21 #define __get_unaligned_be(ptr) ((__force typeof(*(ptr)))({ \
22 __builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \
23 __builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_be16((ptr)), \
24 __builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_be32((ptr)), \
25 __builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_be64((ptr)), \
26 __bad_unaligned_access_size())))); \
29 #define __put_unaligned_le(val, ptr) ({ \
30 void *__gu_p = (ptr); \
31 switch (sizeof(*(ptr))) { \
33 *(u8 *)__gu_p = (__force u8)(val); \
36 put_unaligned_le16((__force u16)(val), __gu_p); \
39 put_unaligned_le32((__force u32)(val), __gu_p); \
42 put_unaligned_le64((__force u64)(val), __gu_p); \
45 __bad_unaligned_access_size(); \
50 #define __put_unaligned_be(val, ptr) ({ \
51 void *__gu_p = (ptr); \
52 switch (sizeof(*(ptr))) { \
54 *(u8 *)__gu_p = (__force u8)(val); \
57 put_unaligned_be16((__force u16)(val), __gu_p); \
60 put_unaligned_be32((__force u32)(val), __gu_p); \
63 put_unaligned_be64((__force u64)(val), __gu_p); \
66 __bad_unaligned_access_size(); \
71 static inline u32 __get_unaligned_be24(const u8 *p)
73 return p[0] << 16 | p[1] << 8 | p[2];
76 static inline u32 get_unaligned_be24(const void *p)
78 return __get_unaligned_be24(p);
81 static inline u32 __get_unaligned_le24(const u8 *p)
83 return p[0] | p[1] << 8 | p[2] << 16;
86 static inline u32 get_unaligned_le24(const void *p)
88 return __get_unaligned_le24(p);
91 static inline void __put_unaligned_be24(const u32 val, u8 *p)
98 static inline void put_unaligned_be24(const u32 val, void *p)
100 __put_unaligned_be24(val, p);
103 static inline void __put_unaligned_le24(const u32 val, u8 *p)
110 static inline void put_unaligned_le24(const u32 val, void *p)
112 __put_unaligned_le24(val, p);
115 #endif /* _LINUX_UNALIGNED_GENERIC_H */