projects / mirror_qemu.git / blame
| Commit | Line | Data |
|---|---|---|
| 623d7e35 RH |
1 | /* |
| 2 | * SPDX-License-Identifier: GPL-2.0-or-later | |
| 3 | * Host specific cpu indentification for ppc. | |
| 4 | */ | |
| 5 | ||
| 6 | #include "qemu/osdep.h" | |
| 7 | #include "host/cpuinfo.h" | |
| 8 | ||
| 9 | #ifdef CONFIG_GETAUXVAL | |
| 10 | # include <sys/auxv.h> | |
| 11 | #else | |
| 12 | # include <asm/cputable.h> | |
| 13 | # include "elf.h" | |
| 14 | #endif | |
| 15 | ||
| 16 | unsigned cpuinfo; | |
| 17 | ||
| 18 | /* Called both as constructor and (possibly) via other constructors. */ | |
| 19 | unsigned __attribute__((constructor)) cpuinfo_init(void) | |
| 20 | { | |
| 21 | unsigned info = cpuinfo; | |
| 22 | unsigned long hwcap, hwcap2; | |
| 23 | ||
| 24 | if (info) { | |
| 25 | return info; | |
| 26 | } | |
| 27 | ||
| 28 | hwcap = qemu_getauxval(AT_HWCAP); | |
| 29 | hwcap2 = qemu_getauxval(AT_HWCAP2); | |
| 30 | info = CPUINFO_ALWAYS; | |
| 31 | ||
| 32 | /* Version numbers are monotonic, and so imply all lower versions. */ | |
| 33 | if (hwcap2 & PPC_FEATURE2_ARCH_3_1) { | |
| 34 | info |= CPUINFO_V3_1 | CPUINFO_V3_0 | CPUINFO_V2_07 | CPUINFO_V2_06; | |
| 35 | } else if (hwcap2 & PPC_FEATURE2_ARCH_3_00) { | |
| 36 | info |= CPUINFO_V3_0 | CPUINFO_V2_07 | CPUINFO_V2_06; | |
| 37 | } else if (hwcap2 & PPC_FEATURE2_ARCH_2_07) { | |
| 38 | info |= CPUINFO_V2_07 | CPUINFO_V2_06; | |
| 39 | } else if (hwcap & PPC_FEATURE_ARCH_2_06) { | |
| 40 | info |= CPUINFO_V2_06; | |
| 41 | } | |
| 42 | ||
| 43 | if (hwcap2 & PPC_FEATURE2_HAS_ISEL) { | |
| 44 | info |= CPUINFO_ISEL; | |
| 45 | } | |
| 46 | if (hwcap & PPC_FEATURE_HAS_ALTIVEC) { | |
| 47 | info |= CPUINFO_ALTIVEC; | |
| 48 | /* We only care about the portion of VSX that overlaps Altivec. */ | |
| 49 | if (hwcap & PPC_FEATURE_HAS_VSX) { | |
| 50 | info |= CPUINFO_VSX; | |
| 51 | } | |
| 52 | } | |
| 53 | ||
| 54 | cpuinfo = info; | |
| 55 | return info; | |
| 56 | } |