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1 /* ----------------------------------------------------------------------- *
3 * Copyright 2002-2004 H. Peter Anvin - All Rights Reserved
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.
11 * ----------------------------------------------------------------------- */
16 * Definitions common to x86 and x86-64 RAID-6 code only
19 #ifndef LINUX_RAID_RAID6X86_H
20 #define LINUX_RAID_RAID6X86_H
22 #if (defined(__i386__) || defined(__x86_64__)) && !defined(__arch_um__)
24 #ifdef __KERNEL__ /* Real code */
28 #else /* Dummy code for user space testing */
30 static inline void kernel_fpu_begin(void)
34 static inline void kernel_fpu_end(void)
38 #define __aligned(x) __attribute__((aligned(x)))
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 */
51 /* Should work well enough on modern CPUs for testing */
52 static inline int boot_cpu_has(int flag
)
54 u32 eax
, ebx
, ecx
, edx
;
56 eax
= (flag
& 0x100) ? 7 :
57 (flag
& 0x20) ? 0x80000001 : 1;
61 : "+a" (eax
), "=b" (ebx
), "=d" (edx
), "+c" (ecx
));
63 return ((flag
& 0x100 ? ebx
:
64 (flag
& 0x80) ? ecx
: edx
) >> (flag
& 31)) & 1;
67 #endif /* ndef __KERNEL__ */