sysdeps/powerpc/dl-procinfo.h

   1 /* Processor capability information handling macros.  PowerPC version.
   2    Copyright (C) 2005-2023 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    <https://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     16
  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 #define PPC_PLATFORM_POWER10            15
  64
  65 static inline const char *
  66 __attribute__ ((unused))
  67 _dl_hwcap_string (int idx)
  68 {
  69   return GLRO(dl_powerpc_cap_flags)[idx];
  70 }
  71
  72 static inline int
  73 __attribute__ ((unused, always_inline))
  74 _dl_string_platform (const char *str)
  75 {
  76   if (str == NULL)
  77     return -1;
  78
  79   if (strncmp (str, "power", 5) == 0)
  80     {
  81       int ret;
  82       str += 5;
  83       switch (*str)
  84         {
  85         case '1':
  86           if (str[1] == '0')
  87             {
  88               ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER10;
  89               str++;
  90             }
  91           else
  92             return -1;
  93           break;
  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 void
 151 cache_geometry (const char * name, unsigned long int geometry)
 152 {
 153   unsigned long int assocty, line;
 154
 155   _dl_printf ("%s", name);
 156
 157   line = geometry & 0xffff;
 158   assocty = (geometry >> 16) & 0xffff;
 159
 160   if (line == 0)
 161     _dl_printf ("Unknown line size, ");
 162   else
 163     _dl_printf ("%luB line size, ", line);
 164
 165   switch (assocty)
 166     {
 167     case 0:
 168       _dl_printf ("Unknown associativity");
 169       break;
 170     case 1:
 171       _dl_printf ("Directly mapped");
 172       break;
 173     case 0xffff:
 174       _dl_printf ("Fully associative");
 175       break;
 176     default:
 177       _dl_printf ("%lu-way set associative", assocty);
 178     }
 179 }
 180
 181 static inline int
 182 __attribute__ ((unused))
 183 _dl_procinfo (unsigned int type, unsigned long int word)
 184 {
 185   switch(type)
 186     {
 187     case AT_HWCAP:
 188       _dl_printf ("AT_HWCAP:            ");
 189
 190       for (int i = 0; i <= _DL_HWCAP_LAST; ++i)
 191        if (word & (1 << i))
 192          _dl_printf (" %s", _dl_hwcap_string (i));
 193       break;
 194     case AT_HWCAP2:
 195       {
 196        unsigned int offset = _DL_HWCAP_LAST + 1;
 197
 198        _dl_printf ("AT_HWCAP2:           ");
 199
 200         /* We have to go through them all because the kernel added the
 201           AT_HWCAP2 features starting with the high bits.  */
 202        for (int i = 0; i <= _DL_HWCAP2_LAST; ++i)
 203          if (word & (1 << i))
 204            _dl_printf (" %s", _dl_hwcap_string (offset + i));
 205        break;
 206       }
 207     case AT_L1I_CACHEGEOMETRY:
 208       {
 209         cache_geometry ("AT_L1I_CACHEGEOMETRY: ", word);
 210         break;
 211       }
 212     case AT_L1D_CACHEGEOMETRY:
 213       {
 214         cache_geometry ("AT_L1D_CACHEGEOMETRY: ", word);
 215         break;
 216       }
 217     case AT_L2_CACHEGEOMETRY:
 218       {
 219         cache_geometry ("AT_L2_CACHEGEOMETRY:  ", word);
 220         break;
 221       }
 222     case AT_L3_CACHEGEOMETRY:
 223       {
 224         cache_geometry ("AT_L3_CACHEGEOMETRY:  ", word);
 225         break;
 226       }
 227     default:
 228       /* Fallback to generic output mechanism.  */
 229       return -1;
 230     }
 231    _dl_printf ("\n");
 232   return 0;
 233 }
 234 #endif
 235
 236 #endif /* dl-procinfo.h */