1  /* Linux/ARM version of processor capability information handling macros.
       2     Copyright (C) 2001-2023 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>
      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 */