arch/x86/include/asm/mach_traps.h

   1 /*
   2  *  Machine specific NMI handling for generic.
   3  *  Split out from traps.c by Osamu Tomita <tomita@cinet.co.jp>
   4  */
   5 #ifndef _ASM_X86_MACH_DEFAULT_MACH_TRAPS_H
   6 #define _ASM_X86_MACH_DEFAULT_MACH_TRAPS_H
   7
   8 #include <asm/mc146818rtc.h>
   9
  10 static inline unsigned char get_nmi_reason(void)
  11 {
  12         return inb(0x61);
  13 }
  14
  15 static inline void reassert_nmi(void)
  16 {
  17         int old_reg = -1;
  18
  19         if (do_i_have_lock_cmos())
  20                 old_reg = current_lock_cmos_reg();
  21         else
  22                 lock_cmos(0); /* register doesn't matter here */
  23         outb(0x8f, 0x70);
  24         inb(0x71);              /* dummy */
  25         outb(0x0f, 0x70);
  26         inb(0x71);              /* dummy */
  27         if (old_reg >= 0)
  28                 outb(old_reg, 0x70);
  29         else
  30                 unlock_cmos();
  31 }
  32
  33 #endif /* _ASM_X86_MACH_DEFAULT_MACH_TRAPS_H */