include/grub/types.h

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 2002,2005,2006,2007,2008  Free Software Foundation, Inc.
   4  *
   5  *  GRUB is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  GRUB is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #ifndef GRUB_TYPES_HEADER
  20 #define GRUB_TYPES_HEADER       1
  21
  22 #include <config.h>
  23 #include <grub/cpu/types.h>
  24
  25 #define UNUSED __attribute__ ((unused))
  26
  27 #ifdef GRUB_UTIL
  28 # define GRUB_CPU_SIZEOF_VOID_P SIZEOF_VOID_P
  29 # define GRUB_CPU_SIZEOF_LONG   SIZEOF_LONG
  30 # ifdef WORDS_BIGENDIAN
  31 #  define GRUB_CPU_WORDS_BIGENDIAN      1
  32 # else
  33 #  undef GRUB_CPU_WORDS_BIGENDIAN
  34 # endif
  35 #else /* ! GRUB_UTIL */
  36 # define GRUB_CPU_SIZEOF_VOID_P GRUB_TARGET_SIZEOF_VOID_P
  37 # define GRUB_CPU_SIZEOF_LONG   GRUB_TARGET_SIZEOF_LONG
  38 # ifdef GRUB_TARGET_WORDS_BIGENDIAN
  39 #  define GRUB_CPU_WORDS_BIGENDIAN      1
  40 # else
  41 #  undef GRUB_CPU_WORDS_BIGENDIAN
  42 # endif
  43 #endif /* ! GRUB_UTIL */
  44
  45 #if GRUB_CPU_SIZEOF_VOID_P != GRUB_CPU_SIZEOF_LONG
  46 # error "This architecture is not supported because sizeof(void *) != sizeof(long)"
  47 #endif
  48
  49 #if GRUB_CPU_SIZEOF_VOID_P != 4 && GRUB_CPU_SIZEOF_VOID_P != 8
  50 # error "This architecture is not supported because sizeof(void *) != 4 and sizeof(void *) != 8"
  51 #endif
  52
  53 /* Define various wide integers.  */
  54 typedef signed char             grub_int8_t;
  55 typedef short                   grub_int16_t;
  56 typedef int                     grub_int32_t;
  57 #if GRUB_CPU_SIZEOF_VOID_P == 8
  58 typedef long                    grub_int64_t;
  59 #else
  60 typedef long long               grub_int64_t;
  61 #endif
  62
  63 typedef unsigned char           grub_uint8_t;
  64 typedef unsigned short          grub_uint16_t;
  65 typedef unsigned                grub_uint32_t;
  66 #if GRUB_CPU_SIZEOF_VOID_P == 8
  67 typedef unsigned long           grub_uint64_t;
  68 #else
  69 typedef unsigned long long      grub_uint64_t;
  70 #endif
  71
  72 /* Misc types.  */
  73 #if GRUB_TARGET_SIZEOF_VOID_P == 8
  74 typedef grub_uint64_t   grub_target_addr_t;
  75 typedef grub_uint64_t   grub_target_off_t;
  76 typedef grub_uint64_t   grub_target_size_t;
  77 typedef grub_int64_t    grub_target_ssize_t;
  78 #else
  79 typedef grub_uint32_t   grub_target_addr_t;
  80 typedef grub_uint32_t   grub_target_off_t;
  81 typedef grub_uint32_t   grub_target_size_t;
  82 typedef grub_int32_t    grub_target_ssize_t;
  83 #endif
  84
  85 #if GRUB_CPU_SIZEOF_VOID_P == 8
  86 typedef grub_uint64_t   grub_addr_t;
  87 typedef grub_uint64_t   grub_size_t;
  88 typedef grub_int64_t    grub_ssize_t;
  89 #else
  90 typedef grub_uint32_t   grub_addr_t;
  91 typedef grub_uint32_t   grub_size_t;
  92 typedef grub_int32_t    grub_ssize_t;
  93 #endif
  94
  95 #if GRUB_CPU_SIZEOF_VOID_P == 8
  96 # define ULONG_MAX 18446744073709551615UL
  97 # define LONG_MAX 9223372036854775807UL
  98 #else
  99 # define ULONG_MAX 4294967295UL
 100 # define LONG_MAX 2147483647UL
 101 #endif
 102
 103 /* The type for representing a file offset.  */
 104 typedef grub_uint64_t   grub_off_t;
 105
 106 /* The type for representing a disk block address.  */
 107 typedef grub_uint64_t   grub_disk_addr_t;
 108
 109 /* Byte-orders.  */
 110 #define grub_swap_bytes16(x)    \
 111 ({ \
 112    grub_uint16_t _x = (x); \
 113    (grub_uint16_t) ((_x << 8) | (_x >> 8)); \
 114 })
 115
 116 #if defined(__GNUC__) && (__GNUC__ > 3) && (__GNUC__ > 4 || __GNUC_MINOR__ >= 3)
 117 static inline grub_uint32_t grub_swap_bytes32(grub_uint32_t x)
 118 {
 119         return __builtin_bswap32(x);
 120 }
 121
 122 static inline grub_uint64_t grub_swap_bytes64(grub_uint64_t x)
 123 {
 124         return __builtin_bswap64(x);
 125 }
 126 #else                                   /* not gcc 4.3 or newer */
 127 #define grub_swap_bytes32(x)    \
 128 ({ \
 129    grub_uint32_t _x = (x); \
 130    (grub_uint32_t) ((_x << 24) \
 131                     | ((_x & (grub_uint32_t) 0xFF00UL) << 8) \
 132                     | ((_x & (grub_uint32_t) 0xFF0000UL) >> 8) \
 133                     | (_x >> 24)); \
 134 })
 135
 136 #define grub_swap_bytes64(x)    \
 137 ({ \
 138    grub_uint64_t _x = (x); \
 139    (grub_uint64_t) ((_x << 56) \
 140                     | ((_x & (grub_uint64_t) 0xFF00ULL) << 40) \
 141                     | ((_x & (grub_uint64_t) 0xFF0000ULL) << 24) \
 142                     | ((_x & (grub_uint64_t) 0xFF000000ULL) << 8) \
 143                     | ((_x & (grub_uint64_t) 0xFF00000000ULL) >> 8) \
 144                     | ((_x & (grub_uint64_t) 0xFF0000000000ULL) >> 24) \
 145                     | ((_x & (grub_uint64_t) 0xFF000000000000ULL) >> 40) \
 146                     | (_x >> 56)); \
 147 })
 148 #endif                                  /* not gcc 4.3 or newer */
 149
 150 #ifdef GRUB_CPU_WORDS_BIGENDIAN
 151 # define grub_cpu_to_le16(x)    grub_swap_bytes16(x)
 152 # define grub_cpu_to_le32(x)    grub_swap_bytes32(x)
 153 # define grub_cpu_to_le64(x)    grub_swap_bytes64(x)
 154 # define grub_le_to_cpu16(x)    grub_swap_bytes16(x)
 155 # define grub_le_to_cpu32(x)    grub_swap_bytes32(x)
 156 # define grub_le_to_cpu64(x)    grub_swap_bytes64(x)
 157 # define grub_cpu_to_be16(x)    ((grub_uint16_t) (x))
 158 # define grub_cpu_to_be32(x)    ((grub_uint32_t) (x))
 159 # define grub_cpu_to_be64(x)    ((grub_uint64_t) (x))
 160 # define grub_be_to_cpu16(x)    ((grub_uint16_t) (x))
 161 # define grub_be_to_cpu32(x)    ((grub_uint32_t) (x))
 162 # define grub_be_to_cpu64(x)    ((grub_uint64_t) (x))
 163 # ifdef GRUB_TARGET_WORDS_BIGENDIAN
 164 #  define grub_target_to_host16(x)      ((grub_uint16_t) (x))
 165 #  define grub_target_to_host32(x)      ((grub_uint32_t) (x))
 166 #  define grub_target_to_host64(x)      ((grub_uint64_t) (x))
 167 #  define grub_host_to_target16(x)      ((grub_uint16_t) (x))
 168 #  define grub_host_to_target32(x)      ((grub_uint32_t) (x))
 169 #  define grub_host_to_target64(x)      ((grub_uint64_t) (x))
 170 # else /* ! GRUB_TARGET_WORDS_BIGENDIAN */
 171 #  define grub_target_to_host16(x)      grub_swap_bytes16(x)
 172 #  define grub_target_to_host32(x)      grub_swap_bytes32(x)
 173 #  define grub_target_to_host64(x)      grub_swap_bytes64(x)
 174 #  define grub_host_to_target16(x)      grub_swap_bytes16(x)
 175 #  define grub_host_to_target32(x)      grub_swap_bytes32(x)
 176 #  define grub_host_to_target64(x)      grub_swap_bytes64(x)
 177 # endif
 178 #else /* ! WORDS_BIGENDIAN */
 179 # define grub_cpu_to_le16(x)    ((grub_uint16_t) (x))
 180 # define grub_cpu_to_le32(x)    ((grub_uint32_t) (x))
 181 # define grub_cpu_to_le64(x)    ((grub_uint64_t) (x))
 182 # define grub_le_to_cpu16(x)    ((grub_uint16_t) (x))
 183 # define grub_le_to_cpu32(x)    ((grub_uint32_t) (x))
 184 # define grub_le_to_cpu64(x)    ((grub_uint64_t) (x))
 185 # define grub_cpu_to_be16(x)    grub_swap_bytes16(x)
 186 # define grub_cpu_to_be32(x)    grub_swap_bytes32(x)
 187 # define grub_cpu_to_be64(x)    grub_swap_bytes64(x)
 188 # define grub_be_to_cpu16(x)    grub_swap_bytes16(x)
 189 # define grub_be_to_cpu32(x)    grub_swap_bytes32(x)
 190 # define grub_be_to_cpu64(x)    grub_swap_bytes64(x)
 191 # ifdef GRUB_TARGET_WORDS_BIGENDIAN
 192 #  define grub_target_to_host16(x)      grub_swap_bytes16(x)
 193 #  define grub_target_to_host32(x)      grub_swap_bytes32(x)
 194 #  define grub_target_to_host64(x)      grub_swap_bytes64(x)
 195 #  define grub_host_to_target16(x)      grub_swap_bytes16(x)
 196 #  define grub_host_to_target32(x)      grub_swap_bytes32(x)
 197 #  define grub_host_to_target64(x)      grub_swap_bytes64(x)
 198 # else /* ! GRUB_TARGET_WORDS_BIGENDIAN */
 199 #  define grub_target_to_host16(x)      ((grub_uint16_t) (x))
 200 #  define grub_target_to_host32(x)      ((grub_uint32_t) (x))
 201 #  define grub_target_to_host64(x)      ((grub_uint64_t) (x))
 202 #  define grub_host_to_target16(x)      ((grub_uint16_t) (x))
 203 #  define grub_host_to_target32(x)      ((grub_uint32_t) (x))
 204 #  define grub_host_to_target64(x)      ((grub_uint64_t) (x))
 205 # endif
 206 #endif /* ! WORDS_BIGENDIAN */
 207
 208 #endif /* ! GRUB_TYPES_HEADER */