| /* ----------------------------------------------------------------------- * |
| * |
| * Copyright 2002-2004 H. Peter Anvin - All Rights Reserved |
| * |
| * This program 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, Inc., 53 Temple Place Ste 330, |
| * Boston MA 02111-1307, USA; either version 2 of the License, or |
| * (at your option) any later version; incorporated herein by reference. |
| * |
| * ----------------------------------------------------------------------- */ |
| |
| /* |
| * raid6/x86.h |
| * |
| * Definitions common to x86 and x86-64 RAID-6 code only |
| */ |
| |
| #ifndef LINUX_RAID_RAID6X86_H |
| #define LINUX_RAID_RAID6X86_H |
| |
| #if (defined(__i386__) || defined(__x86_64__)) && !defined(__arch_um__) |
| |
| #ifdef __KERNEL__ /* Real code */ |
| |
| #include <asm/i387.h> |
| |
| #else /* Dummy code for user space testing */ |
| |
| static inline void kernel_fpu_begin(void) |
| { |
| } |
| |
| static inline void kernel_fpu_end(void) |
| { |
| } |
| |
| #define X86_FEATURE_MMX (0*32+23) /* Multimedia Extensions */ |
| #define X86_FEATURE_FXSR (0*32+24) /* FXSAVE and FXRSTOR instructions |
| * (fast save and restore) */ |
| #define X86_FEATURE_XMM (0*32+25) /* Streaming SIMD Extensions */ |
| #define X86_FEATURE_XMM2 (0*32+26) /* Streaming SIMD Extensions-2 */ |
| #define X86_FEATURE_MMXEXT (1*32+22) /* AMD MMX extensions */ |
| |
| /* Should work well enough on modern CPUs for testing */ |
| static inline int boot_cpu_has(int flag) |
| { |
| u32 eax = (flag >> 5) ? 0x80000001 : 1; |
| u32 edx; |
| |
| asm volatile("cpuid" |
| : "+a" (eax), "=d" (edx) |
| : : "ecx", "ebx"); |
| |
| return (edx >> (flag & 31)) & 1; |
| } |
| |
| #endif /* ndef __KERNEL__ */ |
| |
| #endif |
| #endif |