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 X86_FEATURE_MMX (0*32+23) /* Multimedia Extensions */ 39 #define X86_FEATURE_FXSR (0*32+24) /* FXSAVE and FXRSTOR instructions 40 * (fast save and restore) */ 41 #define X86_FEATURE_XMM (0*32+25) /* Streaming SIMD Extensions */ 42 #define X86_FEATURE_XMM2 (0*32+26) /* Streaming SIMD Extensions-2 */ 43 #define X86_FEATURE_MMXEXT (1*32+22) /* AMD MMX extensions */ 44 45 /* Should work well enough on modern CPUs for testing */ 46 static inline int boot_cpu_has(int flag) 47 { 48 u32 eax = (flag >> 5) ? 0x80000001 : 1; 49 u32 edx; 50 51 asm volatile("cpuid" 52 : "+a" (eax), "=d" (edx) 53 : : "ecx", "ebx"); 54 55 return (edx >> (flag & 31)) & 1; 56 } 57 58 #endif /* ndef __KERNEL__ */ 59 60 #endif 61 #endif 62