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/* 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>
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