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76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/* Copyright (C) 2014-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <unistd.h>
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#include <sys/sysinfo.h>
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#include <arch/chip.h>
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static long int linux_sysconf (int name);
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/* Get the value of the system variable NAME. */
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long int
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__sysconf (int name)
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{
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/* Currently we support only tilepro and tilegx, which have
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statically-known cache sizes. */
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switch (name)
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{
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/* Level 1 cache. */
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case _SC_LEVEL1_ICACHE_SIZE:
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return CHIP_L1I_CACHE_SIZE();
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case _SC_LEVEL1_ICACHE_ASSOC:
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return CHIP_L1I_ASSOC();
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case _SC_LEVEL1_ICACHE_LINESIZE:
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return CHIP_L1I_LINE_SIZE();
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case _SC_LEVEL1_DCACHE_SIZE:
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return CHIP_L1D_CACHE_SIZE();
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case _SC_LEVEL1_DCACHE_ASSOC:
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return CHIP_L1D_ASSOC();
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case _SC_LEVEL1_DCACHE_LINESIZE:
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return CHIP_L1D_LINE_SIZE();
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/* Level 2 cache. */
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case _SC_LEVEL2_CACHE_SIZE:
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return CHIP_L2_CACHE_SIZE();
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case _SC_LEVEL2_CACHE_ASSOC:
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return CHIP_L2_ASSOC();
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case _SC_LEVEL2_CACHE_LINESIZE:
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return CHIP_L2_LINE_SIZE();
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/* Level 3 cache is layered on level 2 cache. */
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case _SC_LEVEL3_CACHE_SIZE:
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return CHIP_L2_CACHE_SIZE() * __get_nprocs();
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case _SC_LEVEL3_CACHE_ASSOC:
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return CHIP_L2_ASSOC();
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case _SC_LEVEL3_CACHE_LINESIZE:
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return CHIP_L2_LINE_SIZE();
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/* No level 4 cache. */
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case _SC_LEVEL4_CACHE_SIZE:
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case _SC_LEVEL4_CACHE_ASSOC:
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case _SC_LEVEL4_CACHE_LINESIZE:
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return -1;
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}
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return linux_sysconf (name);
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}
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/* Now the generic Linux version. */
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#undef __sysconf
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#define __sysconf static linux_sysconf
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#include <sysdeps/unix/sysv/linux/sysconf.c>
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