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 *   Boston 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 * raid6/x86.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
30static inline void kernel_fpu_begin(void)
31{
32}
33
34static inline void kernel_fpu_end(void)
35{
36}
37
38#define __aligned(x) __attribute__((aligned(x)))
39
40#define X86_FEATURE_MMX		(0*32+23) /* Multimedia Extensions */
41#define X86_FEATURE_FXSR	(0*32+24) /* FXSAVE and FXRSTOR instructions
42					   * (fast save and restore) */
43#define X86_FEATURE_XMM		(0*32+25) /* Streaming SIMD Extensions */
44#define X86_FEATURE_XMM2	(0*32+26) /* Streaming SIMD Extensions-2 */
45#define X86_FEATURE_XMM3	(4*32+ 0) /* "pni" SSE-3 */
46#define X86_FEATURE_SSSE3	(4*32+ 9) /* Supplemental SSE-3 */
47#define X86_FEATURE_AVX	(4*32+28) /* Advanced Vector Extensions */
48#define X86_FEATURE_AVX2        (9*32+ 5) /* AVX2 instructions */
49#define X86_FEATURE_MMXEXT	(1*32+22) /* AMD MMX extensions */
50
51/* Should work well enough on modern CPUs for testing */
52static inline int boot_cpu_has(int flag)
53{
54	u32 eax, ebx, ecx, edx;
55
56	eax = (flag & 0x100) ? 7 :
57		(flag & 0x20) ? 0x80000001 : 1;
58	ecx = 0;
59
60	asm volatile("cpuid"
61		     : "+a" (eax), "=b" (ebx), "=d" (edx), "+c" (ecx));
62
63	return ((flag & 0x100 ? ebx :
64		(flag & 0x80) ? ecx : edx) >> (flag & 31)) & 1;
65}
66
67#endif /* ndef __KERNEL__ */
68
69#endif
70#endif
71