sysdeps/unix/sysv/linux/arm/dl-procinfo.h

   1 /* Linux/ARM version of processor capability information handling macros.
   2    Copyright (C) 2001-2024 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>
  24
  25 #define _DL_HWCAP_COUNT 27
  26
  27 /* Low 28 bits are allocated in HWCAP.  */
  28 #define _DL_HWCAP_LAST          27
  29
  30 /* Low 7 bits are allocated in HWCAP2.  */
  31 #define _DL_HWCAP2_LAST         6
  32
  33 /* The kernel provides platform data but it is not interesting.  */
  34 #define _DL_HWCAP_PLATFORM      0
  35
  36
  37 static inline const char *
  38 __attribute__ ((unused))
  39 _dl_hwcap_string (int idx)
  40 {
  41   return GLRO(dl_arm_cap_flags)[idx];
  42 };
  43
  44 static inline int
  45 __attribute__ ((unused))
  46 _dl_procinfo (unsigned int type, unsigned long int word)
  47 {
  48   switch(type)
  49     {
  50     case AT_HWCAP:
  51       _dl_printf ("AT_HWCAP:       ");
  52
  53       for (int i = 0; i <= _DL_HWCAP_LAST; ++i)
  54         if (word & (1 << i))
  55           _dl_printf (" %s", _dl_hwcap_string (i));
  56       break;
  57     case AT_HWCAP2:
  58       {
  59         unsigned int offset = _DL_HWCAP_LAST + 1;
  60
  61         _dl_printf ("AT_HWCAP2:      ");
  62
  63         for (int i = 0; i <= _DL_HWCAP2_LAST; ++i)
  64           if (word & (1 << i))
  65             _dl_printf (" %s", _dl_hwcap_string (offset + i));
  66         break;
  67       }
  68     default:
  69       /* Fallback to generic output mechanism.  */
  70       return -1;
  71     }
  72   _dl_printf ("\n");
  73   return 0;
  74 }
  75
  76 #define HWCAP_IMPORTANT         (HWCAP_ARM_VFP | HWCAP_ARM_NEON)
  77
  78 #define _dl_string_platform(str) (-1)
  79
  80 #endif /* dl-procinfo.h */