1 /* Copyright (C) 2012-2022 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
__getshmlba(void)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 }
40