diff options
Diffstat (limited to 'util/cpuinfo-ppc.c')
-rw-r--r-- | util/cpuinfo-ppc.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/util/cpuinfo-ppc.c b/util/cpuinfo-ppc.c new file mode 100644 index 0000000..d95adc8 --- /dev/null +++ b/util/cpuinfo-ppc.c @@ -0,0 +1,56 @@ +/* + * 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; +} |