/* * Copyright (C) 2007-2013 Free Software Foundation, Inc. * * This file is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 3, or (at your option) any * later version. * * This file is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * Under Section 7 of GPL version 3, you are granted additional * permissions described in the GCC Runtime Library Exception, version * 3.1, as published by the Free Software Foundation. * * You should have received a copy of the GNU General Public License and * a copy of the GCC Runtime Library Exception along with this program; * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see * <http://www.gnu.org/licenses/>. */ /* %ecx */ #define bit_SSE3 (1 << 0) #define bit_PCLMUL (1 << 1) #define bit_LZCNT (1 << 5) #define bit_SSSE3 (1 << 9) #define bit_FMA (1 << 12) #define bit_CMPXCHG16B (1 << 13) #define bit_SSE4_1 (1 << 19) #define bit_SSE4_2 (1 << 20) #define bit_MOVBE (1 << 22) #define bit_POPCNT (1 << 23) #define bit_AES (1 << 25) #define bit_XSAVE (1 << 26) #define bit_OSXSAVE (1 << 27) #define bit_AVX (1 << 28) #define bit_F16C (1 << 29) #define bit_RDRND (1 << 30) /* %edx */ #define bit_CMPXCHG8B (1 << 8) #define bit_CMOV (1 << 15) #define bit_MMX (1 << 23) #define bit_FXSAVE (1 << 24) #define bit_SSE (1 << 25) #define bit_SSE2 (1 << 26) /* Extended Features */ /* %ecx */ #define bit_LAHF_LM (1 << 0) #define bit_ABM (1 << 5) #define bit_SSE4a (1 << 6) #define bit_PRFCHW (1 << 8) #define bit_XOP (1 << 11) #define bit_LWP (1 << 15) #define bit_FMA4 (1 << 16) #define bit_TBM (1 << 21) /* %edx */ #define bit_MMXEXT (1 << 22) #define bit_LM (1 << 29) #define bit_3DNOWP (1 << 30) #define bit_3DNOW (1 << 31) /* Extended Features (%eax == 7) */ #define bit_FSGSBASE (1 << 0) #define bit_BMI (1 << 3) #define bit_HLE (1 << 4) #define bit_AVX2 (1 << 5) #define bit_BMI2 (1 << 8) #define bit_RTM (1 << 11) #define bit_RDSEED (1 << 18) #define bit_ADX (1 << 19) /* %ecx */ #define bit_PKU (1 << 3) #define bit_OSPKE (1 << 4) /* Extended State Enumeration Sub-leaf (%eax == 13, %ecx == 1) */ #define bit_XSAVEOPT (1 << 0) /* Signatures for different CPU implementations as returned in uses of cpuid with level 0. */ #define signature_AMD_ebx 0x68747541 #define signature_AMD_ecx 0x444d4163 #define signature_AMD_edx 0x69746e65 #define signature_CENTAUR_ebx 0x746e6543 #define signature_CENTAUR_ecx 0x736c7561 #define signature_CENTAUR_edx 0x48727561 #define signature_CYRIX_ebx 0x69727943 #define signature_CYRIX_ecx 0x64616574 #define signature_CYRIX_edx 0x736e4978 #define signature_INTEL_ebx 0x756e6547 #define signature_INTEL_ecx 0x6c65746e #define signature_INTEL_edx 0x49656e69 #define signature_TM1_ebx 0x6e617254 #define signature_TM1_ecx 0x55504361 #define signature_TM1_edx 0x74656d73 #define signature_TM2_ebx 0x756e6547 #define signature_TM2_ecx 0x3638784d #define signature_TM2_edx 0x54656e69 #define signature_NSC_ebx 0x646f6547 #define signature_NSC_ecx 0x43534e20 #define signature_NSC_edx 0x79622065 #define signature_NEXGEN_ebx 0x4778654e #define signature_NEXGEN_ecx 0x6e657669 #define signature_NEXGEN_edx 0x72446e65 #define signature_RISE_ebx 0x65736952 #define signature_RISE_ecx 0x65736952 #define signature_RISE_edx 0x65736952 #define signature_SIS_ebx 0x20536953 #define signature_SIS_ecx 0x20536953 #define signature_SIS_edx 0x20536953 #define signature_UMC_ebx 0x20434d55 #define signature_UMC_ecx 0x20434d55 #define signature_UMC_edx 0x20434d55 #define signature_VIA_ebx 0x20414956 #define signature_VIA_ecx 0x20414956 #define signature_VIA_edx 0x20414956 #define signature_VORTEX_ebx 0x74726f56 #define signature_VORTEX_ecx 0x436f5320 #define signature_VORTEX_edx 0x36387865 #if defined(__i386__) && defined(__PIC__) /* %ebx may be the PIC register. */ #if __GNUC__ >= 3 #define __cpuid(level, a, b, c, d) \ __asm__ ("xchg{l}\t{%%}ebx, %k1\n\t" \ "cpuid\n\t" \ "xchg{l}\t{%%}ebx, %k1\n\t" \ : "=a" (a), "=&r" (b), "=c" (c), "=d" (d) \ : "0" (level)) #define __cpuid_count(level, count, a, b, c, d) \ __asm__ ("xchg{l}\t{%%}ebx, %k1\n\t" \ "cpuid\n\t" \ "xchg{l}\t{%%}ebx, %k1\n\t" \ : "=a" (a), "=&r" (b), "=c" (c), "=d" (d) \ : "0" (level), "2" (count)) #else /* Host GCCs older than 3.0 weren't supporting Intel asm syntax nor alternatives in i386 code. */ #define __cpuid(level, a, b, c, d) \ __asm__ ("xchgl\t%%ebx, %k1\n\t" \ "cpuid\n\t" \ "xchgl\t%%ebx, %k1\n\t" \ : "=a" (a), "=&r" (b), "=c" (c), "=d" (d) \ : "0" (level)) #define __cpuid_count(level, count, a, b, c, d) \ __asm__ ("xchgl\t%%ebx, %k1\n\t" \ "cpuid\n\t" \ "xchgl\t%%ebx, %k1\n\t" \ : "=a" (a), "=&r" (b), "=c" (c), "=d" (d) \ : "0" (level), "2" (count)) #endif #elif defined(__x86_64__) && (defined(__code_model_medium__) || defined(__code_model_large__)) && defined(__PIC__) /* %rbx may be the PIC register. */ #define __cpuid(level, a, b, c, d) \ __asm__ ("xchg{q}\t{%%}rbx, %q1\n\t" \ "cpuid\n\t" \ "xchg{q}\t{%%}rbx, %q1\n\t" \ : "=a" (a), "=&r" (b), "=c" (c), "=d" (d) \ : "0" (level)) #define __cpuid_count(level, count, a, b, c, d) \ __asm__ ("xchg{q}\t{%%}rbx, %q1\n\t" \ "cpuid\n\t" \ "xchg{q}\t{%%}rbx, %q1\n\t" \ : "=a" (a), "=&r" (b), "=c" (c), "=d" (d) \ : "0" (level), "2" (count)) #else #define __cpuid(level, a, b, c, d) \ __asm__ ("cpuid\n\t" \ : "=a" (a), "=b" (b), "=c" (c), "=d" (d) \ : "0" (level)) #define __cpuid_count(level, count, a, b, c, d) \ __asm__ ("cpuid\n\t" \ : "=a" (a), "=b" (b), "=c" (c), "=d" (d) \ : "0" (level), "2" (count)) #endif /* Return highest supported input value for cpuid instruction. ext can be either 0x0 or 0x8000000 to return highest supported value for basic or extended cpuid information. Function returns 0 if cpuid is not supported or whatever cpuid returns in eax register. If sig pointer is non-null, then first four bytes of the signature (as found in ebx register) are returned in location pointed by sig. */ static __inline unsigned int __get_cpuid_max (unsigned int __ext, unsigned int *__sig) { unsigned int __eax, __ebx, __ecx, __edx; #ifndef __x86_64__ /* See if we can use cpuid. On AMD64 we always can. */ #if __GNUC__ >= 3 __asm__ ("pushf{l|d}\n\t" "pushf{l|d}\n\t" "pop{l}\t%0\n\t" "mov{l}\t{%0, %1|%1, %0}\n\t" "xor{l}\t{%2, %0|%0, %2}\n\t" "push{l}\t%0\n\t" "popf{l|d}\n\t" "pushf{l|d}\n\t" "pop{l}\t%0\n\t" "popf{l|d}\n\t" : "=&r" (__eax), "=&r" (__ebx) : "i" (0x00200000)); #else /* Host GCCs older than 3.0 weren't supporting Intel asm syntax nor alternatives in i386 code. */ __asm__ ("pushfl\n\t" "pushfl\n\t" "popl\t%0\n\t" "movl\t%0, %1\n\t" "xorl\t%2, %0\n\t" "pushl\t%0\n\t" "popfl\n\t" "pushfl\n\t" "popl\t%0\n\t" "popfl\n\t" : "=&r" (__eax), "=&r" (__ebx) : "i" (0x00200000)); #endif if (!((__eax ^ __ebx) & 0x00200000)) return 0; #endif /* Host supports cpuid. Return highest supported cpuid input value. */ __cpuid (__ext, __eax, __ebx, __ecx, __edx); if (__sig) *__sig = __ebx; return __eax; } /* Return cpuid data for requested cpuid level, as found in returned eax, ebx, ecx and edx registers. The function checks if cpuid is supported and returns 1 for valid cpuid information or 0 for unsupported cpuid level. All pointers are required to be non-null. */ static __inline int __get_cpuid (unsigned int __level, unsigned int *__eax, unsigned int *__ebx, unsigned int *__ecx, unsigned int *__edx) { unsigned int __ext = __level & 0x80000000; if (__get_cpuid_max (__ext, 0) < __level) return 0; __cpuid (__level, *__eax, *__ebx, *__ecx, *__edx); return 1; }