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drivers/md/raid6x86.h
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/* ----------------------------------------------------------------------- * * * 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, * Bostom MA 02111-1307, USA; either version 2 of the License, or * (at your option) any later version; incorporated herein by reference. * * ----------------------------------------------------------------------- */ /* * raid6x86.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__) |
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#ifdef __KERNEL__ /* Real code */ |
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#include <asm/i387.h> |
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#else /* Dummy code for user space testing */ |
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static inline void kernel_fpu_begin(void) |
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{ |
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} |
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static inline void kernel_fpu_end(void) |
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{ |
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} |
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#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 */ |
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/* Should work well enough on modern CPUs for testing */ static inline int boot_cpu_has(int flag) |
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{ |
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u32 eax = (flag >> 5) ? 0x80000001 : 1; u32 edx; |
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asm volatile("cpuid" : "+a" (eax), "=d" (edx) : : "ecx", "ebx"); |
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return (edx >> (flag & 31)) & 1; |
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} |
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#endif /* ndef __KERNEL__ */ #endif #endif |