Revision 34f7145a63211eb7ecfcafa6c2a8db5646baf953 authored by Phil Edworthy on 24 August 2011, 10:43:59 UTC, committed by Paul Mundt on 29 August 2011, 06:32:10 UTC
This adds unaligned memory access support for the following instructions: mov.w @(disp,PC),Rn mov.l @(disp,PC),Rn These instructions are often used on SH2A toolchains. Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
1 parent 0710b91
x86.h
/* ----------------------------------------------------------------------- *
*
* 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.
*
* ----------------------------------------------------------------------- */
/*
* raid6/x86.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
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