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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
Ingo Molnardf6b35f2015-04-24 02:46:00 +020026#include <asm/fpu/api.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 */
Jim Kukunas70567412012-11-08 13:47:44 -080048#define X86_FEATURE_AVX2 (9*32+ 5) /* AVX2 instructions */
H. Peter Anvina7234062007-02-28 20:11:25 -080049#define X86_FEATURE_MMXEXT (1*32+22) /* AMD MMX extensions */
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
H. Peter Anvina7234062007-02-28 20:11:25 -080051/* Should work well enough on modern CPUs for testing */
52static inline int boot_cpu_has(int flag)
Linus Torvalds1da177e2005-04-16 15:20:36 -070053{
Jim Kukunas70567412012-11-08 13:47:44 -080054 u32 eax, ebx, ecx, edx;
55
56 eax = (flag & 0x100) ? 7 :
57 (flag & 0x20) ? 0x80000001 : 1;
58 ecx = 0;
H. Peter Anvina7234062007-02-28 20:11:25 -080059
60 asm volatile("cpuid"
Jim Kukunas70567412012-11-08 13:47:44 -080061 : "+a" (eax), "=b" (ebx), "=d" (edx), "+c" (ecx));
H. Peter Anvina7234062007-02-28 20:11:25 -080062
Jim Kukunas70567412012-11-08 13:47:44 -080063 return ((flag & 0x100 ? ebx :
64 (flag & 0x80) ? ecx : edx) >> (flag & 31)) & 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070065}
66
Linus Torvalds1da177e2005-04-16 15:20:36 -070067#endif /* ndef __KERNEL__ */
68
69#endif
70#endif