| /* Copyright (C) 2014-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <unistd.h> |
| #include <sys/sysinfo.h> |
| #include <arch/chip.h> |
| |
| static long int linux_sysconf (int name); |
| |
| /* Get the value of the system variable NAME. */ |
| long int |
| __sysconf (int name) |
| { |
| /* Currently we support only tilegx, which have statically-known cache |
| sizes. */ |
| switch (name) |
| { |
| /* Level 1 cache. */ |
| case _SC_LEVEL1_ICACHE_SIZE: |
| return CHIP_L1I_CACHE_SIZE(); |
| case _SC_LEVEL1_ICACHE_ASSOC: |
| return CHIP_L1I_ASSOC(); |
| case _SC_LEVEL1_ICACHE_LINESIZE: |
| return CHIP_L1I_LINE_SIZE(); |
| case _SC_LEVEL1_DCACHE_SIZE: |
| return CHIP_L1D_CACHE_SIZE(); |
| case _SC_LEVEL1_DCACHE_ASSOC: |
| return CHIP_L1D_ASSOC(); |
| case _SC_LEVEL1_DCACHE_LINESIZE: |
| return CHIP_L1D_LINE_SIZE(); |
| |
| /* Level 2 cache. */ |
| case _SC_LEVEL2_CACHE_SIZE: |
| return CHIP_L2_CACHE_SIZE(); |
| case _SC_LEVEL2_CACHE_ASSOC: |
| return CHIP_L2_ASSOC(); |
| case _SC_LEVEL2_CACHE_LINESIZE: |
| return CHIP_L2_LINE_SIZE(); |
| |
| /* Level 3 cache is layered on level 2 cache. */ |
| case _SC_LEVEL3_CACHE_SIZE: |
| return CHIP_L2_CACHE_SIZE() * __get_nprocs(); |
| case _SC_LEVEL3_CACHE_ASSOC: |
| return CHIP_L2_ASSOC(); |
| case _SC_LEVEL3_CACHE_LINESIZE: |
| return CHIP_L2_LINE_SIZE(); |
| |
| /* No level 4 cache. */ |
| case _SC_LEVEL4_CACHE_SIZE: |
| case _SC_LEVEL4_CACHE_ASSOC: |
| case _SC_LEVEL4_CACHE_LINESIZE: |
| return -1; |
| } |
| |
| return linux_sysconf (name); |
| } |
| |
| /* Now the generic Linux version. */ |
| #undef __sysconf |
| #define __sysconf static linux_sysconf |
| #include <sysdeps/unix/sysv/linux/sysconf.c> |
