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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__)) && !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