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Filename/usr/src/linux-headers-3.13.0-24/arch/x86/include/asm/mach_traps.h
Size974
Permissionrw-r--r--
Ownerroot : root
Create time27-Apr-2025 09:50
Last modified20-Jan-2014 10:40
Last accessed06-Jul-2025 15:11
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/*
* Machine specific NMI handling for generic.
* Split out from traps.c by Osamu Tomita <[email protected]>
*/
#ifndef _ASM_X86_MACH_DEFAULT_MACH_TRAPS_H
#define _ASM_X86_MACH_DEFAULT_MACH_TRAPS_H

#include <asm/mc146818rtc.h>

#define NMI_REASON_PORT 0x61

#define NMI_REASON_SERR 0x80
#define NMI_REASON_IOCHK 0x40
#define NMI_REASON_MASK (NMI_REASON_SERR | NMI_REASON_IOCHK)

#define NMI_REASON_CLEAR_SERR 0x04
#define NMI_REASON_CLEAR_IOCHK 0x08
#define NMI_REASON_CLEAR_MASK 0x0f

static inline unsigned char default_get_nmi_reason(void)
{
return inb(NMI_REASON_PORT);
}

static inline void reassert_nmi(void)
{
int old_reg = -1;

if (do_i_have_lock_cmos())
old_reg = current_lock_cmos_reg();
else
lock_cmos(0); /* register doesn't matter here */
outb(0x8f, 0x70);
inb(0x71); /* dummy */
outb(0x0f, 0x70);
inb(0x71); /* dummy */
if (old_reg >= 0)
outb(old_reg, 0x70);
else
unlock_cmos();
}

#endif /* _ASM_X86_MACH_DEFAULT_MACH_TRAPS_H */