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