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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* ----------------------------------------------------------------------- *
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,
Atsushi SAKAI93ed05e2009-03-31 14:57:37 +11008 * Boston MA 02111-1307, USA; either version 2 of the License, or
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * (at your option) any later version; incorporated herein by reference.
10 *
11 * ----------------------------------------------------------------------- */
12
13/*
NeilBrowna8e026c2010-08-12 06:44:54 +100014 * raid6/x86.h
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 *
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
Al Viroca5cd872007-10-29 04:31:16 +000022#if (defined(__i386__) || defined(__x86_64__)) && !defined(__arch_um__)
Linus Torvalds1da177e2005-04-16 15:20:36 -070023
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#ifdef __KERNEL__ /* Real code */
25
H. Peter Anvina7234062007-02-28 20:11:25 -080026#include <asm/i387.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027
28#else /* Dummy code for user space testing */
29
H. Peter Anvina7234062007-02-28 20:11:25 -080030static inline void kernel_fpu_begin(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070031{
Linus Torvalds1da177e2005-04-16 15:20:36 -070032}
33
H. Peter Anvina7234062007-02-28 20:11:25 -080034static inline void kernel_fpu_end(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070035{
Linus Torvalds1da177e2005-04-16 15:20:36 -070036}
37
Jim Kukunas2dbf7082012-05-22 13:54:23 +100038#define __aligned(x) __attribute__((aligned(x)))
39
H. Peter Anvina7234062007-02-28 20:11:25 -080040#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 */
Jim Kukunas2dbf7082012-05-22 13:54:23 +100045#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 */
H. Peter Anvina7234062007-02-28 20:11:25 -080048#define X86_FEATURE_MMXEXT (1*32+22) /* AMD MMX extensions */
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
H. Peter Anvina7234062007-02-28 20:11:25 -080050/* Should work well enough on modern CPUs for testing */
51static inline int boot_cpu_has(int flag)
Linus Torvalds1da177e2005-04-16 15:20:36 -070052{
Jim Kukunas2dbf7082012-05-22 13:54:23 +100053 u32 eax = (flag & 0x20) ? 0x80000001 : 1;
54 u32 ecx, edx;
H. Peter Anvina7234062007-02-28 20:11:25 -080055
56 asm volatile("cpuid"
Jim Kukunas2dbf7082012-05-22 13:54:23 +100057 : "+a" (eax), "=d" (edx), "=c" (ecx)
58 : : "ebx");
H. Peter Anvina7234062007-02-28 20:11:25 -080059
Jim Kukunas2dbf7082012-05-22 13:54:23 +100060 return ((flag & 0x80 ? ecx : edx) >> (flag & 31)) & 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070061}
62
Linus Torvalds1da177e2005-04-16 15:20:36 -070063#endif /* ndef __KERNEL__ */
64
65#endif
66#endif