projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| 1da177e4 LT |
2 | * Machine specific NMI handling for generic. |
| 3 | * Split out from traps.c by Osamu Tomita <tomita@cinet.co.jp> | |
| 4 | */ | |
| 05e4d316 PA |
5 | #ifndef _ASM_X86_MACH_DEFAULT_MACH_TRAPS_H |
| 6 | #define _ASM_X86_MACH_DEFAULT_MACH_TRAPS_H | |
| 1da177e4 LT |
7 | |
| 8 | #include <asm/mc146818rtc.h> | |
| 9 | ||
| 1c7b74d4 HY |
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 | ||
| 064a59b6 | 20 | static inline unsigned char default_get_nmi_reason(void) |
| 1da177e4 | 21 | { |
| 1c7b74d4 | 22 | return inb(NMI_REASON_PORT); |
| 1da177e4 LT |
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 | ||
| 05e4d316 | 43 | #endif /* _ASM_X86_MACH_DEFAULT_MACH_TRAPS_H */ |