1 /* ----------------------------------------------------------------------- * 2 * 3 * Copyright 2002-2004 H. Peter Anvin - All Rights Reserved 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation, Inc., 53 Temple Place Ste 330, 8 * Boston MA 02111-1307, USA; either version 2 of the License, or 9 * (at your option) any later version; incorporated herein by reference. 10 * 11 * ----------------------------------------------------------------------- */ 12 13 /* 14 * raid6/x86.h 15 * 16 * Definitions common to x86 and x86-64 RAID-6 code only 17 */ 18 19 #ifndef LINUX_RAID_RAID6X86_H 20 #define LINUX_RAID_RAID6X86_H 21 22 #if (defined(__i386__) || defined(__x86_64__)) && !defined(__arch_um__) 23 24 #ifdef __KERNEL__ /* Real code */ 25 26 #include <asm/i387.h> 27 28 #else /* Dummy code for user space testing */ 29 30 static inline void kernel_fpu_begin(void) 31 { 32 } 33 34 static inline void kernel_fpu_end(void) 35 { 36 } 37 38 #define __aligned(x) __attribute__((aligned(x))) 39 40 #define X86_FEATURE_MMX (0*32+23) /* Multimedia Extensions */ 41 #define X86_FEATURE_FXSR (0*32+24) /* FXSAVE and FXRSTOR instructions 42 * (fast save and restore) */ 43 #define X86_FEATURE_XMM (0*32+25) /* Streaming SIMD Extensions */ 44 #define X86_FEATURE_XMM2 (0*32+26) /* Streaming SIMD Extensions-2 */ 45 #define X86_FEATURE_XMM3 (4*32+ 0) /* "pni" SSE-3 */ 46 #define X86_FEATURE_SSSE3 (4*32+ 9) /* Supplemental SSE-3 */ 47 #define X86_FEATURE_AVX (4*32+28) /* Advanced Vector Extensions */ 48 #define X86_FEATURE_AVX2 (9*32+ 5) /* AVX2 instructions */ 49 #define X86_FEATURE_MMXEXT (1*32+22) /* AMD MMX extensions */ 50 51 /* Should work well enough on modern CPUs for testing */ 52 static inline int boot_cpu_has(int flag) 53 { 54 u32 eax, ebx, ecx, edx; 55 56 eax = (flag & 0x100) ? 7 : 57 (flag & 0x20) ? 0x80000001 : 1; 58 ecx = 0; 59 60 asm volatile("cpuid" 61 : "+a" (eax), "=b" (ebx), "=d" (edx), "+c" (ecx)); 62 63 return ((flag & 0x100 ? ebx : 64 (flag & 0x80) ? ecx : edx) >> (flag & 31)) & 1; 65 } 66 67 #endif /* ndef __KERNEL__ */ 68 69 #endif 70 #endif 71