include/asm-i386/mach-default/mach_traps.h

   1 /*
   2  *  include/asm-i386/mach-default/mach_traps.h
   3  *
   4  *  Machine specific NMI handling for generic.
   5  *  Split out from traps.c by Osamu Tomita <tomita@cinet.co.jp>
   6  */
   7 #ifndef _MACH_TRAPS_H
   8 #define _MACH_TRAPS_H
   9
  10 #include <asm/mc146818rtc.h>
  11
  12 static inline void clear_mem_error(unsigned char reason)
  13 {
  14         reason = (reason & 0xf) | 4;
  15         outb(reason, 0x61);
  16 }
  17
  18 static inline void clear_io_check_error(unsigned char reason)
  19 {
  20         unsigned long i;
  21
  22         reason = (reason & 0xf) | 8;
  23         outb(reason, 0x61);
  24         i = 2000;
  25         while (--i) udelay(1000);
  26         reason &= ~8;
  27         outb(reason, 0x61);
  28 }
  29
  30 static inline unsigned char get_nmi_reason(void)
  31 {
  32         return inb(0x61);
  33 }
  34
  35 static inline void reassert_nmi(void)
  36 {
  37         int old_reg = -1;
  38
  39         if (do_i_have_lock_cmos())
  40                 old_reg = current_lock_cmos_reg();
  41         else
  42                 lock_cmos(0); /* register doesn't matter here */
  43         outb(0x8f, 0x70);
  44         inb(0x71);              /* dummy */
  45         outb(0x0f, 0x70);
  46         inb(0x71);              /* dummy */
  47         if (old_reg >= 0)
  48                 outb(old_reg, 0x70);
  49         else
  50                 unlock_cmos();
  51 }
  52
  53 #endif /* !_MACH_TRAPS_H */