mach_traps.h

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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 */