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 <asm/byteorder.h>
10
11/* Set by the arch if it can handle unaligned accesses in hardware. */
12#ifdef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
13# include <linux/unaligned/access_ok.h>
14#endif
15
16#if defined(__LITTLE_ENDIAN)
17# ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
18#  include <linux/unaligned/le_struct.h>
19#  include <linux/unaligned/be_byteshift.h>
20# endif
21# include <linux/unaligned/generic.h>
22# define get_unaligned	__get_unaligned_le
23# define put_unaligned	__put_unaligned_le
24#elif defined(__BIG_ENDIAN)
25# ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
26#  include <linux/unaligned/be_struct.h>
27#  include <linux/unaligned/le_byteshift.h>
28# endif
29# include <linux/unaligned/generic.h>
30# define get_unaligned	__get_unaligned_be
31# define put_unaligned	__put_unaligned_be
32#else
33# error need to define endianess
34#endif
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
35
36#endif /* __ASM_GENERIC_UNALIGNED_H */

  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 */