root/arch/x86/include/asm/mach_traps.h

DEFINITIONS

1. default_get_nmi_reason
2. reassert_nmi

/*
 *  Machine specific NMI handling for generic.
 *  Split out from traps.c by Osamu Tomita <tomita@cinet.co.jp>
 */
#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 */