linux-user/cpu-uname.c

   1 /*
   2  *  cpu to uname machine name map
   3  *
   4  *  Copyright (c) 2009 Loïc Minier
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <stdio.h>
  21
  22 #include "qemu.h"
  23 //#include "qemu-common.h"
  24 #include "cpu-uname.h"
  25
  26 /* return highest utsname machine name for emulated instruction set
  27  *
  28  * NB: the default emulated CPU ("any") might not match any existing CPU, e.g.
  29  * on ARM it has all features turned on, so there is no perfect arch string to
  30  * return here */
  31 const char *cpu_to_uname_machine(void *cpu_env)
  32 {
  33 #ifdef TARGET_ARM
  34     /* utsname machine name on linux arm is CPU arch name + endianness, e.g.
  35      * armv7l; to get a list of CPU arch names from the linux source, use:
  36      *     grep arch_name: -A1 linux/arch/arm/mm/proc-*.S
  37      * see arch/arm/kernel/setup.c: setup_processor()
  38      *
  39      * to test by CPU id, compare cpu_env->cp15.c0_cpuid to ARM_CPUID_*
  40      * defines and to test by CPU feature, use arm_feature(cpu_env,
  41      * ARM_FEATURE_*) */
  42
  43     /* in theory, endianness is configurable on some ARM CPUs, but this isn't
  44      * used in user mode emulation */
  45 #ifdef TARGET_WORDS_BIGENDIAN
  46 #define utsname_suffix "b"
  47 #else
  48 #define utsname_suffix "l"
  49 #endif
  50     if (arm_feature(cpu_env, ARM_FEATURE_V7))
  51         return "armv7" utsname_suffix;
  52     if (arm_feature(cpu_env, ARM_FEATURE_V6))
  53         return "armv6" utsname_suffix;
  54     /* earliest emulated CPU is ARMv5TE; qemu can emulate the 1026, but not its
  55      * Jazelle support */
  56     return "armv5te" utsname_suffix;
  57 #elif defined(TARGET_X86_64)
  58     return "x86-64";
  59 #elif defined(TARGET_I386)
  60     /* see arch/x86/kernel/cpu/bugs.c: check_bugs(), 386, 486, 586, 686 */
  61     uint32_t cpuid_version = ((CPUX86State *)cpu_env)->cpuid_version;
  62     int family = ((cpuid_version >> 8) & 0x0f) + ((cpuid_version >> 20) & 0xff);
  63     if (family == 4)
  64         return "i486";
  65     if (family == 5)
  66         return "i586";
  67     return "i686";
  68 #else
  69     /* default is #define-d in each arch/ subdir */
  70     return UNAME_MACHINE;
  71 #endif
  72 }