62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
/* ----------------------------------------------------------------------- *
|
|
*
|
|
* 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.
|
|
*
|
|
* ----------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* 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
|