sysdeps/powerpc/dl-procinfo.h

   1 /* Processor capability information handling macros.  PowerPC version.
   2    Copyright (C) 2005-2015 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library 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 GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library.  If not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _DL_PROCINFO_H
  20 #define _DL_PROCINFO_H 1
  21
  22 #include <ldsodefs.h>
  23 #include <sysdep.h>     /* This defines the PPC_FEATURE[2]_* macros.  */
  24
  25 /* There are 25 bits used, but they are bits 7..31.  */
  26 #define _DL_HWCAP_FIRST         7
  27
  28 /* The total number of available bits (including those prior to
  29    _DL_HWCAP_FIRST).  Some of these bits might not be used.  */
  30 #define _DL_HWCAP_COUNT         64
  31
  32 /* Features started at bit 31 and decremented as new features were added.  */
  33 #define _DL_HWCAP_LAST          31
  34
  35 /* AT_HWCAP2 features started at bit 31 and decremented as new features were
  36    added.  HWCAP2 feature bits start at bit 0.  */
  37 #define _DL_HWCAP2_LAST         31
  38
  39 /* These bits influence library search.  */
  40 #define HWCAP_IMPORTANT         (PPC_FEATURE_HAS_ALTIVEC \
  41                                 + PPC_FEATURE_HAS_DFP)
  42
  43 #define _DL_PLATFORMS_COUNT     14
  44
  45 #define _DL_FIRST_PLATFORM      32
  46 /* Mask to filter out platforms.  */
  47 #define _DL_HWCAP_PLATFORM      (((1ULL << _DL_PLATFORMS_COUNT) - 1) \
  48                                 << _DL_FIRST_PLATFORM)
  49
  50 /* Platform bits (relative to _DL_FIRST_PLATFORM).  */
  51 #define PPC_PLATFORM_POWER4             0
  52 #define PPC_PLATFORM_PPC970             1
  53 #define PPC_PLATFORM_POWER5             2
  54 #define PPC_PLATFORM_POWER5_PLUS        3
  55 #define PPC_PLATFORM_POWER6             4
  56 #define PPC_PLATFORM_CELL_BE            5
  57 #define PPC_PLATFORM_POWER6X            6
  58 #define PPC_PLATFORM_POWER7             7
  59 #define PPC_PLATFORM_PPCA2              8
  60 #define PPC_PLATFORM_PPC405             9
  61 #define PPC_PLATFORM_PPC440             10
  62 #define PPC_PLATFORM_PPC464             11
  63 #define PPC_PLATFORM_PPC476             12
  64 #define PPC_PLATFORM_POWER8             13
  65
  66 static inline const char *
  67 __attribute__ ((unused))
  68 _dl_hwcap_string (int idx)
  69 {
  70   return GLRO(dl_powerpc_cap_flags)[idx - _DL_HWCAP_FIRST];
  71 }
  72
  73 static inline const char *
  74 __attribute__ ((unused))
  75 _dl_platform_string (int idx)
  76 {
  77   return GLRO(dl_powerpc_platforms)[idx - _DL_FIRST_PLATFORM];
  78 }
  79
  80 static inline int
  81 __attribute__ ((unused))
  82 _dl_string_hwcap (const char *str)
  83 {
  84   for (int i = _DL_HWCAP_FIRST; i < _DL_HWCAP_COUNT; ++i)
  85     if (strcmp (str, _dl_hwcap_string (i)) == 0)
  86       return i;
  87   return -1;
  88 }
  89
  90 static inline int
  91 __attribute__ ((unused, always_inline))
  92 _dl_string_platform (const char *str)
  93 {
  94   if (str == NULL)
  95     return -1;
  96
  97   if (strncmp (str, GLRO(dl_powerpc_platforms)[PPC_PLATFORM_POWER4], 5) == 0)
  98     {
  99       int ret;
 100       str += 5;
 101       switch (*str)
 102         {
 103         case '4':
 104           ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER4;
 105           break;
 106         case '5':
 107           ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER5;
 108           if (str[1] == '+')
 109             {
 110               ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER5_PLUS;
 111               ++str;
 112             }
 113           break;
 114         case '6':
 115           ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER6;
 116           if (str[1] == 'x')
 117             {
 118               ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER6X;
 119               ++str;
 120             }
 121           break;
 122         case '7':
 123           ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER7;
 124           break;
 125         case '8':
 126           ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER8;
 127           break;
 128         default:
 129           return -1;
 130         }
 131       if (str[1] == '\0')
 132        return ret;
 133     }
 134   else if (strncmp (str, GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC970],
 135                     3) == 0)
 136     {
 137       if (strcmp (str + 3, GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC970]
 138                            + 3) == 0)
 139         return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC970;
 140       else if (strcmp (str + 3,
 141                        GLRO(dl_powerpc_platforms)[PPC_PLATFORM_CELL_BE] + 3)
 142                == 0)
 143         return _DL_FIRST_PLATFORM + PPC_PLATFORM_CELL_BE;
 144       else if (strcmp (str + 3,
 145                        GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPCA2] + 3)
 146                == 0)
 147         return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPCA2;
 148       else if (strcmp (str + 3,
 149                        GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC405] + 3)
 150                == 0)
 151         return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC405;
 152       else if (strcmp (str + 3,
 153                        GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC440] + 3)
 154                == 0)
 155         return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC440;
 156       else if (strcmp (str + 3,
 157                        GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC464] + 3)
 158                == 0)
 159         return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC464;
 160       else if (strcmp (str + 3,
 161                        GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC476] + 3)
 162                == 0)
 163         return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC476;
 164     }
 165
 166   return -1;
 167 }
 168
 169 #if IS_IN (rtld)
 170 static inline int
 171 __attribute__ ((unused))
 172 _dl_procinfo (unsigned int type, unsigned long int word)
 173 {
 174   switch(type)
 175     {
 176     case AT_HWCAP:
 177       _dl_printf ("AT_HWCAP:       ");
 178
 179       for (int i = _DL_HWCAP_FIRST; i <= _DL_HWCAP_LAST; ++i)
 180        if (word & (1 << i))
 181          _dl_printf (" %s", _dl_hwcap_string (i));
 182       break;
 183     case AT_HWCAP2:
 184       {
 185        unsigned int offset = _DL_HWCAP_LAST + 1;
 186
 187        _dl_printf ("AT_HWCAP2:      ");
 188
 189         /* We have to go through them all because the kernel added the
 190           AT_HWCAP2 features starting with the high bits.  */
 191        for (int i = 0; i <= _DL_HWCAP2_LAST; ++i)
 192          if (word & (1 << i))
 193            _dl_printf (" %s", _dl_hwcap_string (offset + i));
 194        break;
 195       }
 196     default:
 197       /* This should not happen.  */
 198       return -1;
 199     }
 200    _dl_printf ("\n");
 201   return 0;
 202 }
 203 #endif
 204
 205 #endif /* dl-procinfo.h */