1  /* Copyright (C) 2012-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <unistd.h>
      19  #include <sys/shm.h>
      20  #include <ldsodefs.h>
      21  
      22  int
      23  __getshmlba (void)
      24  {
      25    uint64_t hwcap = GLRO(dl_hwcap);
      26    int pgsz = GLRO(dl_pagesize);
      27  
      28    if (hwcap & HWCAP_SPARC_V9)
      29      {
      30        if (pgsz < (16 * 1024))
      31  	return 16 * 1024;
      32        else
      33  	return pgsz;
      34      }
      35    else if (!(hwcap & HWCAP_SPARC_FLUSH))
      36      return 64 * 1024;
      37    else
      38      return 256 * 1024;
      39  }