1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2
3 #ifndef _ENDIAN_H_
4 #define _ENDIAN_H_
5
6 #include <arch/byteorder.h>
7 #include <stdint.h>
8 #include <swab.h>
9
10 #if defined(__LITTLE_ENDIAN)
11 #define cpu_to_le64(x) ((uint64_t)(x))
12 #define le64_to_cpu(x) ((uint64_t)(x))
13 #define cpu_to_le32(x) ((uint32_t)(x))
14 #define le32_to_cpu(x) ((uint32_t)(x))
15 #define cpu_to_le16(x) ((uint16_t)(x))
16 #define le16_to_cpu(x) ((uint16_t)(x))
17 #define cpu_to_be64(x) swab64(x)
18 #define be64_to_cpu(x) swab64(x)
19 #define cpu_to_be32(x) swab32(x)
20 #define be32_to_cpu(x) swab32(x)
21 #define cpu_to_be16(x) swab16(x)
22 #define be16_to_cpu(x) swab16(x)
23 #elif defined(__BIG_ENDIAN)
24 #define cpu_to_le64(x) swab64(x)
25 #define le64_to_cpu(x) swab64(x)
26 #define cpu_to_le32(x) swab32(x)
27 #define le32_to_cpu(x) swab32(x)
28 #define cpu_to_le16(x) swab16(x)
29 #define le16_to_cpu(x) swab16(x)
30 #define cpu_to_be64(x) ((uint64_t)(x))
31 #define be64_to_cpu(x) ((uint64_t)(x))
32 #define cpu_to_be32(x) ((uint32_t)(x))
33 #define be32_to_cpu(x) ((uint32_t)(x))
34 #define cpu_to_be16(x) ((uint16_t)(x))
35 #define be16_to_cpu(x) ((uint16_t)(x))
36 #else
37 #error "<arch/byteorder.h> must #define __LITTLE_ENDIAN or __BIG_ENDIAN"
38 #endif
39
40 #define ntohll(x) be64_to_cpu(x)
41 #define htonll(x) cpu_to_be64(x)
42 #define ntohl(x) be32_to_cpu(x)
43 #define htonl(x) cpu_to_be32(x)
44
45 #define __clrsetbits(endian, bits, addr, clear, set) \
46 write##bits(addr, cpu_to_##endian##bits((endian##bits##_to_cpu( \
47 read##bits(addr)) & ~((uint##bits##_t)(clear))) | (set)))
48
49 #define clrbits_le64(addr, clear) __clrsetbits(le, 64, addr, clear, 0)
50 #define clrbits_be64(addr, clear) __clrsetbits(be, 64, addr, clear, 0)
51 #define clrbits_le32(addr, clear) __clrsetbits(le, 32, addr, clear, 0)
52 #define clrbits_be32(addr, clear) __clrsetbits(be, 32, addr, clear, 0)
53 #define clrbits_le16(addr, clear) __clrsetbits(le, 16, addr, clear, 0)
54 #define clrbits_be16(addr, clear) __clrsetbits(be, 16, addr, clear, 0)
55
56 #define setbits_le64(addr, set) __clrsetbits(le, 64, addr, 0, set)
57 #define setbits_be64(addr, set) __clrsetbits(be, 64, addr, 0, set)
58 #define setbits_le32(addr, set) __clrsetbits(le, 32, addr, 0, set)
59 #define setbits_be32(addr, set) __clrsetbits(be, 32, addr, 0, set)
60 #define setbits_le16(addr, set) __clrsetbits(le, 16, addr, 0, set)
61 #define setbits_be16(addr, set) __clrsetbits(be, 16, addr, 0, set)
62
63 #define clrsetbits_le64(addr, clear, set) __clrsetbits(le, 64, addr, clear, set)
64 #define clrsetbits_be64(addr, clear, set) __clrsetbits(be, 64, addr, clear, set)
65 #define clrsetbits_le32(addr, clear, set) __clrsetbits(le, 32, addr, clear, set)
66 #define clrsetbits_be32(addr, clear, set) __clrsetbits(be, 32, addr, clear, set)
67 #define clrsetbits_le16(addr, clear, set) __clrsetbits(le, 16, addr, clear, set)
68 #define clrsetbits_be16(addr, clear, set) __clrsetbits(be, 16, addr, clear, set)
69
70 /* be16dec/be32dec/be64dec/le16dec/le32dec/le64dec family of functions. */
71 #define DEFINE_ENDIAN_DEC(endian, width) \
72 static inline uint##width##_t endian##width##dec(const void *p) \
73 { \
74 return endian##width##_to_cpu(*(uint##width##_t *)p); \
75 }
76 DEFINE_ENDIAN_DEC(be, 16)
77 DEFINE_ENDIAN_DEC(be, 32)
78 DEFINE_ENDIAN_DEC(be, 64)
79 DEFINE_ENDIAN_DEC(le, 16)
80 DEFINE_ENDIAN_DEC(le, 32)
81 DEFINE_ENDIAN_DEC(le, 64)
82
83 /* be16enc/be32enc/be64enc/le16enc/le32enc/le64enc family of functions. */
84 #define DEFINE_ENDIAN_ENC(endian, width) \
85 static inline void endian##width##enc(void *p, uint##width##_t u) \
86 { \
87 *(uint##width##_t *)p = cpu_to_##endian##width(u); \
88 }
89 DEFINE_ENDIAN_ENC(be, 16)
90 DEFINE_ENDIAN_ENC(be, 32)
91 DEFINE_ENDIAN_ENC(be, 64)
92 DEFINE_ENDIAN_ENC(le, 16)
93 DEFINE_ENDIAN_ENC(le, 32)
94 DEFINE_ENDIAN_ENC(le, 64)
95
96 /*
97 * Portable (API) endian support that can be used in code that is shared
98 * with userspace (man 3 endian) tools.
99 */
htobe16(uint16_t host_16bits)100 static inline uint16_t htobe16(uint16_t host_16bits)
101 {
102 return cpu_to_be16(host_16bits);
103 }
104
htole16(uint16_t host_16bits)105 static inline uint16_t htole16(uint16_t host_16bits)
106 {
107 return cpu_to_le16(host_16bits);
108 }
109
be16toh(uint16_t big_endian_16bits)110 static inline uint16_t be16toh(uint16_t big_endian_16bits)
111 {
112 return be16_to_cpu(big_endian_16bits);
113 }
114
le16toh(uint16_t little_endian_16bits)115 static inline uint16_t le16toh(uint16_t little_endian_16bits)
116 {
117 return le16_to_cpu(little_endian_16bits);
118 }
119
htobe32(uint32_t host_32bits)120 static inline uint32_t htobe32(uint32_t host_32bits)
121 {
122 return cpu_to_be32(host_32bits);
123 }
124
htole32(uint32_t host_32bits)125 static inline uint32_t htole32(uint32_t host_32bits)
126 {
127 return cpu_to_le32(host_32bits);
128 }
129
be32toh(uint32_t big_endian_32bits)130 static inline uint32_t be32toh(uint32_t big_endian_32bits)
131 {
132 return be32_to_cpu(big_endian_32bits);
133 }
134
le32toh(uint32_t little_endian_32bits)135 static inline uint32_t le32toh(uint32_t little_endian_32bits)
136 {
137 return le32_to_cpu(little_endian_32bits);
138 }
139
htobe64(uint64_t host_64bits)140 static inline uint64_t htobe64(uint64_t host_64bits)
141 {
142 return cpu_to_be64(host_64bits);
143 }
144
htole64(uint64_t host_64bits)145 static inline uint64_t htole64(uint64_t host_64bits)
146 {
147 return cpu_to_le64(host_64bits);
148 }
149
be64toh(uint64_t big_endian_64bits)150 static inline uint64_t be64toh(uint64_t big_endian_64bits)
151 {
152 return be64_to_cpu(big_endian_64bits);
153 }
154
le64toh(uint64_t little_endian_64bits)155 static inline uint64_t le64toh(uint64_t little_endian_64bits)
156 {
157 return le64_to_cpu(little_endian_64bits);
158 }
159
160 #endif
161