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__)
23
24#ifdef __KERNEL__     /* Real code */
25
26#include <asm/i387.h>
27
28#else /* Dummy code for user space testing */
29
30static inline void kernel_fpu_begin(void)
31{
32}
33
34static 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 */
46static 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
62