Merge branch 'for-upstream' of git://repo.or.cz/qemu/agraf
[qemu.git] / 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 }