src/include/endian.h

   1 /*
   2  * Copyright (C) 2013 The Chromium OS Authors. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation; either version 2 of
   7  * the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but without any warranty; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #ifndef _ENDIAN_H_
  16 #define _ENDIAN_H_
  17
  18 #include <arch/byteorder.h>
  19 #include <stdint.h>
  20 #include <swab.h>
  21
  22 #if defined(__LITTLE_ENDIAN)
  23         #define cpu_to_le64(x) ((uint64_t)(x))
  24         #define le64_to_cpu(x) ((uint64_t)(x))
  25         #define cpu_to_le32(x) ((uint32_t)(x))
  26         #define le32_to_cpu(x) ((uint32_t)(x))
  27         #define cpu_to_le16(x) ((uint16_t)(x))
  28         #define le16_to_cpu(x) ((uint16_t)(x))
  29         #define cpu_to_be64(x) swab64(x)
  30         #define be64_to_cpu(x) swab64(x)
  31         #define cpu_to_be32(x) swab32(x)
  32         #define be32_to_cpu(x) swab32(x)
  33         #define cpu_to_be16(x) swab16(x)
  34         #define be16_to_cpu(x) swab16(x)
  35 #elif defined(__BIG_ENDIAN)
  36         #define cpu_to_le64(x) swab64(x)
  37         #define le64_to_cpu(x) swab64(x)
  38         #define cpu_to_le32(x) swab32(x)
  39         #define le32_to_cpu(x) swab32(x)
  40         #define cpu_to_le16(x) swab16(x)
  41         #define le16_to_cpu(x) swab16(x)
  42         #define cpu_to_be64(x) ((uint64_t)(x))
  43         #define be64_to_cpu(x) ((uint64_t)(x))
  44         #define cpu_to_be32(x) ((uint32_t)(x))
  45         #define be32_to_cpu(x) ((uint32_t)(x))
  46         #define cpu_to_be16(x) ((uint16_t)(x))
  47         #define be16_to_cpu(x) ((uint16_t)(x))
  48 #else
  49         #error "<arch/byteorder.h> must #define __LITTLE_ENDIAN or __BIG_ENDIAN"
  50 #endif
  51
  52 #define ntohll(x) be64_to_cpu(x)
  53 #define htonll(x) cpu_to_be64(x)
  54 #define ntohl(x)  be32_to_cpu(x)
  55 #define htonl(x)  cpu_to_be32(x)
  56
  57 #define __clrsetbits(endian, bits, addr, clear, set) \
  58         write##bits(addr, cpu_to_##endian##bits((endian##bits##_to_cpu( \
  59                 read##bits(addr)) & ~((uint##bits##_t)(clear))) | (set)))
  60
  61 #define clrbits_le64(addr, clear)       __clrsetbits(le, 64, addr, clear, 0)
  62 #define clrbits_be64(addr, clear)       __clrsetbits(be, 64, addr, clear, 0)
  63 #define clrbits_le32(addr, clear)       __clrsetbits(le, 32, addr, clear, 0)
  64 #define clrbits_be32(addr, clear)       __clrsetbits(be, 32, addr, clear, 0)
  65 #define clrbits_le16(addr, clear)       __clrsetbits(le, 16, addr, clear, 0)
  66 #define clrbits_be16(addr, clear)       __clrsetbits(be, 16, addr, clear, 0)
  67
  68 #define setbits_le64(addr, set)         __clrsetbits(le, 64, addr, 0, set)
  69 #define setbits_be64(addr, set)         __clrsetbits(be, 64, addr, 0, set)
  70 #define setbits_le32(addr, set)         __clrsetbits(le, 32, addr, 0, set)
  71 #define setbits_be32(addr, set)         __clrsetbits(be, 32, addr, 0, set)
  72 #define setbits_le16(addr, set)         __clrsetbits(le, 16, addr, 0, set)
  73 #define setbits_be16(addr, set)         __clrsetbits(be, 16, addr, 0, set)
  74
  75 #define clrsetbits_le64(addr, clear, set) __clrsetbits(le, 64, addr, clear, set)
  76 #define clrsetbits_be64(addr, clear, set) __clrsetbits(be, 64, addr, clear, set)
  77 #define clrsetbits_le32(addr, clear, set) __clrsetbits(le, 32, addr, clear, set)
  78 #define clrsetbits_be32(addr, clear, set) __clrsetbits(be, 32, addr, clear, set)
  79 #define clrsetbits_le16(addr, clear, set) __clrsetbits(le, 16, addr, clear, set)
  80 #define clrsetbits_be16(addr, clear, set) __clrsetbits(be, 16, addr, clear, set)
  81
  82 #define clrsetbits_8(addr, clear, set) \
  83         write8(addr, (read8(addr) & ~(clear)) | (set))
  84 #define clrbits_8(addr, clear) clrsetbits_8(addr, clear, 0)
  85 #define setbits_8(addr, set) setbits_8(addr, 0, set)
  86
  87 #ifndef __ROMCC__
  88 /*
  89  * Portable (API) endian support that can be used in code that is shared
  90  * with userspace (man 3 endian) tools.
  91  */
  92 static inline uint16_t htobe16(uint16_t host_16bits)
  93 {
  94         return cpu_to_be16(host_16bits);
  95 }
  96
  97 static inline uint16_t htole16(uint16_t host_16bits)
  98 {
  99         return cpu_to_le16(host_16bits);
 100 }
 101
 102 static inline uint16_t be16toh(uint16_t big_endian_16bits)
 103 {
 104         return be16_to_cpu(big_endian_16bits);
 105 }
 106
 107 static inline uint16_t le16toh(uint16_t little_endian_16bits)
 108 {
 109         return le16_to_cpu(little_endian_16bits);
 110 }
 111
 112 static inline uint32_t htobe32(uint32_t host_32bits)
 113 {
 114         return cpu_to_be32(host_32bits);
 115 }
 116
 117 static inline uint32_t htole32(uint32_t host_32bits)
 118 {
 119         return cpu_to_le32(host_32bits);
 120 }
 121
 122 static inline uint32_t be32toh(uint32_t big_endian_32bits)
 123 {
 124         return be32_to_cpu(big_endian_32bits);
 125 }
 126
 127 static inline uint32_t le32toh(uint32_t little_endian_32bits)
 128 {
 129         return le32_to_cpu(little_endian_32bits);
 130 }
 131
 132 static inline uint64_t htobe64(uint64_t host_64bits)
 133 {
 134         return cpu_to_be64(host_64bits);
 135 }
 136
 137 static inline uint64_t htole64(uint64_t host_64bits)
 138 {
 139         return cpu_to_le64(host_64bits);
 140 }
 141
 142 static inline uint64_t be64toh(uint64_t big_endian_64bits)
 143 {
 144         return be64_to_cpu(big_endian_64bits);
 145 }
 146
 147 static inline uint64_t le64toh(uint64_t little_endian_64bits)
 148 {
 149         return le64_to_cpu(little_endian_64bits);
 150 }
 151 #endif
 152
 153 #endif