src/include/endian.h

   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  */
 100 static inline uint16_t htobe16(uint16_t host_16bits)
 101 {
 102         return cpu_to_be16(host_16bits);
 103 }
 104
 105 static inline uint16_t htole16(uint16_t host_16bits)
 106 {
 107         return cpu_to_le16(host_16bits);
 108 }
 109
 110 static inline uint16_t be16toh(uint16_t big_endian_16bits)
 111 {
 112         return be16_to_cpu(big_endian_16bits);
 113 }
 114
 115 static inline uint16_t le16toh(uint16_t little_endian_16bits)
 116 {
 117         return le16_to_cpu(little_endian_16bits);
 118 }
 119
 120 static inline uint32_t htobe32(uint32_t host_32bits)
 121 {
 122         return cpu_to_be32(host_32bits);
 123 }
 124
 125 static inline uint32_t htole32(uint32_t host_32bits)
 126 {
 127         return cpu_to_le32(host_32bits);
 128 }
 129
 130 static inline uint32_t be32toh(uint32_t big_endian_32bits)
 131 {
 132         return be32_to_cpu(big_endian_32bits);
 133 }
 134
 135 static inline uint32_t le32toh(uint32_t little_endian_32bits)
 136 {
 137         return le32_to_cpu(little_endian_32bits);
 138 }
 139
 140 static inline uint64_t htobe64(uint64_t host_64bits)
 141 {
 142         return cpu_to_be64(host_64bits);
 143 }
 144
 145 static inline uint64_t htole64(uint64_t host_64bits)
 146 {
 147         return cpu_to_le64(host_64bits);
 148 }
 149
 150 static inline uint64_t be64toh(uint64_t big_endian_64bits)
 151 {
 152         return be64_to_cpu(big_endian_64bits);
 153 }
 154
 155 static inline uint64_t le64toh(uint64_t little_endian_64bits)
 156 {
 157         return le64_to_cpu(little_endian_64bits);
 158 }
 159
 160 #endif