116 строки
2.9 KiB
C
116 строки
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_UNALIGNED_GENERIC_H
|
|
#define _LINUX_UNALIGNED_GENERIC_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
/*
|
|
* Cause a link-time error if we try an unaligned access other than
|
|
* 1,2,4 or 8 bytes long
|
|
*/
|
|
extern void __bad_unaligned_access_size(void);
|
|
|
|
#define __get_unaligned_le(ptr) ((__force typeof(*(ptr)))({ \
|
|
__builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \
|
|
__builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_le16((ptr)), \
|
|
__builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_le32((ptr)), \
|
|
__builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_le64((ptr)), \
|
|
__bad_unaligned_access_size())))); \
|
|
}))
|
|
|
|
#define __get_unaligned_be(ptr) ((__force typeof(*(ptr)))({ \
|
|
__builtin_choose_expr(sizeof(*(ptr)) == 1, *(ptr), \
|
|
__builtin_choose_expr(sizeof(*(ptr)) == 2, get_unaligned_be16((ptr)), \
|
|
__builtin_choose_expr(sizeof(*(ptr)) == 4, get_unaligned_be32((ptr)), \
|
|
__builtin_choose_expr(sizeof(*(ptr)) == 8, get_unaligned_be64((ptr)), \
|
|
__bad_unaligned_access_size())))); \
|
|
}))
|
|
|
|
#define __put_unaligned_le(val, ptr) ({ \
|
|
void *__gu_p = (ptr); \
|
|
switch (sizeof(*(ptr))) { \
|
|
case 1: \
|
|
*(u8 *)__gu_p = (__force u8)(val); \
|
|
break; \
|
|
case 2: \
|
|
put_unaligned_le16((__force u16)(val), __gu_p); \
|
|
break; \
|
|
case 4: \
|
|
put_unaligned_le32((__force u32)(val), __gu_p); \
|
|
break; \
|
|
case 8: \
|
|
put_unaligned_le64((__force u64)(val), __gu_p); \
|
|
break; \
|
|
default: \
|
|
__bad_unaligned_access_size(); \
|
|
break; \
|
|
} \
|
|
(void)0; })
|
|
|
|
#define __put_unaligned_be(val, ptr) ({ \
|
|
void *__gu_p = (ptr); \
|
|
switch (sizeof(*(ptr))) { \
|
|
case 1: \
|
|
*(u8 *)__gu_p = (__force u8)(val); \
|
|
break; \
|
|
case 2: \
|
|
put_unaligned_be16((__force u16)(val), __gu_p); \
|
|
break; \
|
|
case 4: \
|
|
put_unaligned_be32((__force u32)(val), __gu_p); \
|
|
break; \
|
|
case 8: \
|
|
put_unaligned_be64((__force u64)(val), __gu_p); \
|
|
break; \
|
|
default: \
|
|
__bad_unaligned_access_size(); \
|
|
break; \
|
|
} \
|
|
(void)0; })
|
|
|
|
static inline u32 __get_unaligned_be24(const u8 *p)
|
|
{
|
|
return p[0] << 16 | p[1] << 8 | p[2];
|
|
}
|
|
|
|
static inline u32 get_unaligned_be24(const void *p)
|
|
{
|
|
return __get_unaligned_be24(p);
|
|
}
|
|
|
|
static inline u32 __get_unaligned_le24(const u8 *p)
|
|
{
|
|
return p[0] | p[1] << 8 | p[2] << 16;
|
|
}
|
|
|
|
static inline u32 get_unaligned_le24(const void *p)
|
|
{
|
|
return __get_unaligned_le24(p);
|
|
}
|
|
|
|
static inline void __put_unaligned_be24(const u32 val, u8 *p)
|
|
{
|
|
*p++ = val >> 16;
|
|
*p++ = val >> 8;
|
|
*p++ = val;
|
|
}
|
|
|
|
static inline void put_unaligned_be24(const u32 val, void *p)
|
|
{
|
|
__put_unaligned_be24(val, p);
|
|
}
|
|
|
|
static inline void __put_unaligned_le24(const u32 val, u8 *p)
|
|
{
|
|
*p++ = val;
|
|
*p++ = val >> 8;
|
|
*p++ = val >> 16;
|
|
}
|
|
|
|
static inline void put_unaligned_le24(const u32 val, void *p)
|
|
{
|
|
__put_unaligned_le24(val, p);
|
|
}
|
|
|
|
#endif /* _LINUX_UNALIGNED_GENERIC_H */
|