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| author | David Woodhouse <David.Woodhouse@intel.com> | 2010-08-09 11:36:44 +0200 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2010-08-09 11:36:44 +0200 |
| commit | 2144381da478cc4aa3a29ee29b0c5e6ddaaced14 (patch) | |
| tree | 380a29fec86b537ed602d12f4050654b1c66c27c /lib/raid6/raid6x86.h | |
| parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile (diff) | |
| parent | async_tx: Move ASYNC_RAID6_TEST option to crypto/async_tx/, fix dependencies (diff) | |
| download | linux-2144381da478cc4aa3a29ee29b0c5e6ddaaced14.tar.xz linux-2144381da478cc4aa3a29ee29b0c5e6ddaaced14.zip | |
Merge branch 'async' of macbook:git/btrfs-unstable
Conflicts:
drivers/md/Makefile
lib/raid6/unroll.pl
Diffstat (limited to 'lib/raid6/raid6x86.h')
| -rw-r--r-- | lib/raid6/raid6x86.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/lib/raid6/raid6x86.h b/lib/raid6/raid6x86.h new file mode 100644 index 000000000000..4c22c1568558 --- /dev/null +++ b/lib/raid6/raid6x86.h @@ -0,0 +1,61 @@ +/* ----------------------------------------------------------------------- * + * + * Copyright 2002-2004 H. Peter Anvin - All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, Inc., 53 Temple Place Ste 330, + * Boston MA 02111-1307, USA; either version 2 of the License, or + * (at your option) any later version; incorporated herein by reference. + * + * ----------------------------------------------------------------------- */ + +/* + * raid6x86.h + * + * Definitions common to x86 and x86-64 RAID-6 code only + */ + +#ifndef LINUX_RAID_RAID6X86_H +#define LINUX_RAID_RAID6X86_H + +#if (defined(__i386__) || defined(__x86_64__)) && !defined(__arch_um__) + +#ifdef __KERNEL__ /* Real code */ + +#include <asm/i387.h> + +#else /* Dummy code for user space testing */ + +static inline void kernel_fpu_begin(void) +{ +} + +static inline void kernel_fpu_end(void) +{ +} + +#define X86_FEATURE_MMX (0*32+23) /* Multimedia Extensions */ +#define X86_FEATURE_FXSR (0*32+24) /* FXSAVE and FXRSTOR instructions + * (fast save and restore) */ +#define X86_FEATURE_XMM (0*32+25) /* Streaming SIMD Extensions */ +#define X86_FEATURE_XMM2 (0*32+26) /* Streaming SIMD Extensions-2 */ +#define X86_FEATURE_MMXEXT (1*32+22) /* AMD MMX extensions */ + +/* Should work well enough on modern CPUs for testing */ +static inline int boot_cpu_has(int flag) +{ + u32 eax = (flag >> 5) ? 0x80000001 : 1; + u32 edx; + + asm volatile("cpuid" + : "+a" (eax), "=d" (edx) + : : "ecx", "ebx"); + + return (edx >> (flag & 31)) & 1; +} + +#endif /* ndef __KERNEL__ */ + +#endif +#endif |