| | 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 | * Bostom 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 | * raid6x86.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 |
projects / linux-2.6-block.git / blame_incremental