x86, NMI: Add NMI symbol constants and rename memory parity to PCI SERR
[sched_deadline:linux-26.git] / 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 #define NMI_REASON_PORT         0x61
11
12 #define NMI_REASON_SERR         0x80
13 #define NMI_REASON_IOCHK        0x40
14 #define NMI_REASON_MASK         (NMI_REASON_SERR | NMI_REASON_IOCHK)
15
16 #define NMI_REASON_CLEAR_SERR   0x04
17 #define NMI_REASON_CLEAR_IOCHK  0x08
18 #define NMI_REASON_CLEAR_MASK   0x0f
19
20 static inline unsigned char get_nmi_reason(void)
21 {
22         return inb(NMI_REASON_PORT);
23 }
24
25 static inline void reassert_nmi(void)
26 {
27         int old_reg = -1;
28
29         if (do_i_have_lock_cmos())
30                 old_reg = current_lock_cmos_reg();
31         else
32                 lock_cmos(0); /* register doesn't matter here */
33         outb(0x8f, 0x70);
34         inb(0x71);              /* dummy */
35         outb(0x0f, 0x70);
36         inb(0x71);              /* dummy */
37         if (old_reg >= 0)
38                 outb(old_reg, 0x70);
39         else
40                 unlock_cmos();
41 }
42
43 #endif /* _ASM_X86_MACH_DEFAULT_MACH_TRAPS_H */