blob: d95adc8ccdcf8987c0fcc7ca9a6f847298e3732a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
/*
* SPDX-License-Identifier: GPL-2.0-or-later
* Host specific cpu indentification for ppc.
*/
#include "qemu/osdep.h"
#include "host/cpuinfo.h"
#ifdef CONFIG_GETAUXVAL
# include <sys/auxv.h>
#else
# include <asm/cputable.h>
# include "elf.h"
#endif
unsigned cpuinfo;
/* Called both as constructor and (possibly) via other constructors. */
unsigned __attribute__((constructor)) cpuinfo_init(void)
{
unsigned info = cpuinfo;
unsigned long hwcap, hwcap2;
if (info) {
return info;
}
hwcap = qemu_getauxval(AT_HWCAP);
hwcap2 = qemu_getauxval(AT_HWCAP2);
info = CPUINFO_ALWAYS;
/* Version numbers are monotonic, and so imply all lower versions. */
if (hwcap2 & PPC_FEATURE2_ARCH_3_1) {
info |= CPUINFO_V3_1 | CPUINFO_V3_0 | CPUINFO_V2_07 | CPUINFO_V2_06;
} else if (hwcap2 & PPC_FEATURE2_ARCH_3_00) {
info |= CPUINFO_V3_0 | CPUINFO_V2_07 | CPUINFO_V2_06;
} else if (hwcap2 & PPC_FEATURE2_ARCH_2_07) {
info |= CPUINFO_V2_07 | CPUINFO_V2_06;
} else if (hwcap & PPC_FEATURE_ARCH_2_06) {
info |= CPUINFO_V2_06;
}
if (hwcap2 & PPC_FEATURE2_HAS_ISEL) {
info |= CPUINFO_ISEL;
}
if (hwcap & PPC_FEATURE_HAS_ALTIVEC) {
info |= CPUINFO_ALTIVEC;
/* We only care about the portion of VSX that overlaps Altivec. */
if (hwcap & PPC_FEATURE_HAS_VSX) {
info |= CPUINFO_VSX;
}
}
cpuinfo = info;
return info;
}
|