path: root/sysdeps/x86_64/cacheinfo.c

/* x86_64 cache info.
   Copyright (C) 2003-2013 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 <assert.h>
#include <stdbool.h>
#include <stdlib.h>
#include <unistd.h>
#include <cpuid.h>

#ifndef __cpuid_count
/* FIXME: Provide __cpuid_count if it isn't defined.  Copied from gcc
   4.4.0.  Remove this if gcc 4.4 is the minimum requirement.  */
# if defined(__i386__) && defined(__PIC__)
/* %ebx may be the PIC register.  */
#  define __cpuid_count(level, count, a, b, c, d)		\
  __asm__ ("xchg{l}\t{%%}ebx, %1\n\t"			\
	   "cpuid\n\t"					\
	   "xchg{l}\t{%%}ebx, %1\n\t"			\
	   : "=a" (a), "=r" (b), "=c" (c), "=d" (d)	\
	   : "0" (level), "2" (count))
# else
#  define __cpuid_count(level, count, a, b, c, d)		\
  __asm__ ("cpuid\n\t"					\
	   : "=a" (a), "=b" (b), "=c" (c), "=d" (d)	\
	   : "0" (level), "2" (count))
# endif
#endif

#ifdef USE_MULTIARCH
# include "multiarch/init-arch.h"

# define is_intel __cpu_features.kind == arch_kind_intel
# define is_amd __cpu_features.kind == arch_kind_amd
# define max_cpuid __cpu_features.max_cpuid
#else
  /* This spells out "GenuineIntel".  */
# define is_intel \
  ebx == 0x756e6547 && ecx == 0x6c65746e && edx == 0x49656e69
  /* This spells out "AuthenticAMD".  */
# define is_amd \
  ebx == 0x68747541 && ecx == 0x444d4163 && edx == 0x69746e65
#endif

static const struct intel_02_cache_info
{
  unsigned char idx;
  unsigned char assoc;
  unsigned char linesize;
  unsigned char rel_name;
  unsigned int size;
} intel_02_known [] =
  {
#define M(sc) ((sc) - _SC_LEVEL1_ICACHE_SIZE)
    { 0x06,  4, 32, M(_SC_LEVEL1_ICACHE_SIZE),    8192 },
    { 0x08,  4, 32, M(_SC_LEVEL1_ICACHE_SIZE),   16384 },
    { 0x09,  4, 32, M(_SC_LEVEL1_ICACHE_SIZE),   32768 },
    { 0x0a,  2, 32, M(_SC_LEVEL1_DCACHE_SIZE),    8192 },
    { 0x0c,  4, 32, M(_SC_LEVEL1_DCACHE_SIZE),   16384 },
    { 0x0d,  4, 64, M(_SC_LEVEL1_DCACHE_SIZE),   16384 },
    { 0x0e,  6, 64, M(_SC_LEVEL1_DCACHE_SIZE),   24576 },
    { 0x21,  8, 64, M(_SC_LEVEL2_CACHE_SIZE),   262144 },
    { 0x22,  4, 64, M(_SC_LEVEL3_CACHE_SIZE),   524288 },
    { 0x23,  8, 64, M(_SC_LEVEL3_CACHE_SIZE),  1048576 },
    { 0x25,  8, 64, M(_SC_LEVEL3_CACHE_SIZE),  2097152 },
    { 0x29,  8, 64, M(_SC_LEVEL3_CACHE_SIZE),  4194304 },
    {