1 files changed, 11 insertions, 1 deletions

diff --git a/arch/x86/include/asm/mach_traps.h b/arch/x86/include/asm/mach_traps.h
index f7920601e472..72a8b52e7dfd 100644
--- a/arch/x86/include/asm/mach_traps.h
+++ b/arch/x86/include/asm/mach_traps.h
@@ -7,9 +7,19 @@
 
 #include <asm/mc146818rtc.h>
 
+#define NMI_REASON_PORT         0x61
+
+#define NMI_REASON_SERR         0x80
+#define NMI_REASON_IOCHK        0x40
+#define NMI_REASON_MASK         (NMI_REASON_SERR | NMI_REASON_IOCHK)
+
+#define NMI_REASON_CLEAR_SERR   0x04
+#define NMI_REASON_CLEAR_IOCHK  0x08
+#define NMI_REASON_CLEAR_MASK   0x0f
+
 static inline unsigned char get_nmi_reason(void)
 {
-        return inb(0x61);
+        return inb(NMI_REASON_PORT);
 }
 
 static inline void reassert_nmi(void)