sysdeps/powerpc/dl-procinfo.h

   1 /* Processor capability information handling macros.  PowerPC version.
   2    Copyright (C) 2005-2017 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 /* The total number of available bits (including those prior to
  26    _DL_HWCAP_FIRST).  Some of these bits might not be used.  */
  27 #define _DL_HWCAP_COUNT         64
  28
  29 /* Features started at bit 31 and decremented as new features were added.  */
  30 #define _DL_HWCAP_LAST          31
  31
  32 /* AT_HWCAP2 features started at bit 31 and decremented as new features were
  33    added.  HWCAP2 feature bits start at bit 0.  */
  34 #define _DL_HWCAP2_LAST         31
  35
  36 /* These bits influence library search.  */
  37 #define HWCAP_IMPORTANT         (PPC_FEATURE_HAS_ALTIVEC \
  38                                 + PPC_FEATURE_HAS_DFP)
  39
  40 #define _DL_PLATFORMS_COUNT     15
  41
  42 #define _DL_FIRST_PLATFORM      32
  43 /* Mask to filter out platforms.  */
  44 #define _DL_HWCAP_PLATFORM      (((1ULL << _DL_PLATFORMS_COUNT) - 1) \
  45                                 << _DL_FIRST_PLATFORM)
  46
  47 /* Platform bits (relative to _DL_FIRST_PLATFORM).  */
  48 #define PPC_PLATFORM_POWER4             0
  49 #define PPC_PLATFORM_PPC970             1
  50 #define PPC_PLATFORM_POWER5             2
  51 #define PPC_PLATFORM_POWER5_PLUS        3
  52 #define PPC_PLATFORM_POWER6             4
  53 #define PPC_PLATFORM_CELL_BE            5
  54 #define PPC_PLATFORM_POWER6X            6
  55 #define PPC_PLATFORM_POWER7             7
  56 #define PPC_PLATFORM_PPCA2              8
  57 #define PPC_PLATFORM_PPC405             9
  58 #define PPC_PLATFORM_PPC440             10
  59 #define PPC_PLATFORM_PPC464             11
  60 #define PPC_PLATFORM_PPC476             12
  61 #define PPC_PLATFORM_POWER8             13
  62 #define PPC_PLATFORM_POWER9             14
  63
  64 static inline const char *
  65 __attribute__ ((unused))
  66 _dl_hwcap_string (int idx)
  67 {
  68   return GLRO(dl_powerpc_cap_flags)[idx];
  69 }
  70
  71 static inline int
  72 __attribute__ ((unused))
  73 _dl_string_hwcap (const char *str)
  74 {
  75   for (int i = 0; i < _DL_HWCAP_COUNT; ++i)
  76     if (strcmp (str, _dl_hwcap_string (i)) == 0)
  77       return i;
  78   return -1;
  79 }
  80
  81 static inline int
  82 __attribute__ ((unused, always_inline))
  83 _dl_string_platform (const char *str)
  84 {
  85   if (str == NULL)
  86     return -1;
  87
  88   if (strncmp (str, "power", 5) == 0)
  89     {
  90       int ret;
  91       str += 5;
  92       switch (*str)
  93         {
  94         case '4':
  95           ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER4;
  96           break;
  97         case '5':
  98           ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER5;
  99           if (str[1] == '+')
 100             {
 101               ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER5_PLUS;
 102               ++str;
 103             }
 104           break;
 105         case '6':
 106           ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER6;
 107           if (str[1] == 'x')
 108             {
 109               ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER6X;
 110               ++str;
 111             }
 112           break;
 113         case '7':
 114           ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER7;
 115           break;
 116         case '8':
 117           ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER8;
 118           break;
 119         case '9':
 120           ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER9;
 121           break;
 122         default:
 123           return -1;
 124         }
 125       if (str[1] == '\0')
 126        return ret;
 127     }
 128   else if (strncmp (str, "ppc", 3) == 0)
 129     {
 130       if (strcmp (str + 3, "970") == 0)
 131         return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC970;
 132       else if (strcmp (str + 3, "-cell-be") == 0)
 133         return _DL_FIRST_PLATFORM + PPC_PLATFORM_CELL_BE;
 134       else if (strcmp (str + 3, "a2") == 0)
 135         return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPCA2;
 136       else if (strcmp (str + 3, "405") == 0)
 137         return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC405;
 138       else if (strcmp (str + 3, "440") == 0)
 139         return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC440;
 140       else if (strcmp (str + 3, "464") == 0)
 141         return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC464;
 142       else if (strcmp (str + 3, "476") == 0)
 143         return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC476;
 144     }
 145
 146   return -1;
 147 }
 148
 149 #if IS_IN (rtld)
 150 static inline int
 151 __attribute__ ((unused))
 152 _dl_procinfo (unsigned int type, unsigned long int word)
 153 {
 154   switch(type)
 155     {
 156     case AT_HWCAP:
 157       _dl_printf ("AT_HWCAP:       ");
 158
 159       for (int i = 0; i <= _DL_HWCAP_LAST; ++i)
 160        if (word & (1 << i))
 161          _dl_printf (" %s", _dl_hwcap_string (i));
 162       break;
 163     case AT_HWCAP2:
 164       {
 165        unsigned int offset = _DL_HWCAP_LAST + 1;
 166
 167        _dl_printf ("AT_HWCAP2:      ");
 168
 169         /* We have to go through them all because the kernel added the
 170           AT_HWCAP2 features starting with the high bits.  */
 171        for (int i = 0; i <= _DL_HWCAP2_LAST; ++i)
 172          if (word & (1 << i))
 173            _dl_printf (" %s", _dl_hwcap_string (offset + i));
 174        break;
 175       }
 176     default:
 177       /* This should not happen.  */
 178       return -1;
 179     }
 180    _dl_printf ("\n");
 181   return 0;
 182 }
 183 #endif
 184
 185 #endif /* dl-procinfo.h */