include/asm-x86/mach-default/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 _MACH_TRAPS_H
   6 #define _MACH_TRAPS_H
   7
   8 #include <asm/mc146818rtc.h>
   9
  10 static inline void clear_mem_error(unsigned char reason)
  11 {
  12         reason = (reason & 0xf) | 4;
  13         outb(reason, 0x61);
  14 }
  15
  16 static inline unsigned char get_nmi_reason(void)
  17 {
  18         return inb(0x61);
  19 }
  20
  21 static inline void reassert_nmi(void)
  22 {
  23         int old_reg = -1;
  24
  25         if (do_i_have_lock_cmos())
  26                 old_reg = current_lock_cmos_reg();
  27         else
  28                 lock_cmos(0); /* register doesn't matter here */
  29         outb(0x8f, 0x70);
  30         inb(0x71);              /* dummy */
  31         outb(0x0f, 0x70);
  32         inb(0x71);              /* dummy */
  33         if (old_reg >= 0)
  34                 outb(old_reg, 0x70);
  35         else
  36                 unlock_cmos();
  37 }
  38
  39 #endif /* !_MACH_TRAPS_H */