1 #ifndef _ASM_X86_NMI_H 2 #define _ASM_X86_NMI_H 3 4 #include <linux/pm.h> 5 #include <asm/irq.h> 6 #include <asm/io.h> 7 8 #ifdef ARCH_HAS_NMI_WATCHDOG 9 10 /** 11 * do_nmi_callback 12 * 13 * Check to see if a callback exists and execute it. Return 1 14 * if the handler exists and was handled successfully. 15 */ 16 int do_nmi_callback(struct pt_regs *regs, int cpu); 17 18 extern void die_nmi(char *str, struct pt_regs *regs, int do_panic); 19 extern int check_nmi_watchdog(void); 20 extern int nmi_watchdog_enabled; 21 extern int avail_to_resrv_perfctr_nmi_bit(unsigned int); 22 extern int reserve_perfctr_nmi(unsigned int); 23 extern void release_perfctr_nmi(unsigned int); 24 extern int reserve_evntsel_nmi(unsigned int); 25 extern void release_evntsel_nmi(unsigned int); 26 27 extern void setup_apic_nmi_watchdog(void *); 28 extern void stop_apic_nmi_watchdog(void *); 29 extern void disable_timer_nmi_watchdog(void); 30 extern void enable_timer_nmi_watchdog(void); 31 extern int nmi_watchdog_tick(struct pt_regs *regs, unsigned reason); 32 extern void cpu_nmi_set_wd_enabled(void); 33 34 extern atomic_t nmi_active; 35 extern unsigned int nmi_watchdog; 36 #define NMI_NONE 0 37 #define NMI_IO_APIC 1 38 #define NMI_LOCAL_APIC 2 39 #define NMI_INVALID 3 40 41 struct ctl_table; 42 extern int proc_nmi_enabled(struct ctl_table *, int , 43 void __user *, size_t *, loff_t *); 44 extern int unknown_nmi_panic; 45 46 void arch_trigger_all_cpu_backtrace(void); 47 #define arch_trigger_all_cpu_backtrace arch_trigger_all_cpu_backtrace 48 49 static inline void localise_nmi_watchdog(void) 50 { 51 if (nmi_watchdog == NMI_IO_APIC) 52 nmi_watchdog = NMI_LOCAL_APIC; 53 } 54 55 /* check if nmi_watchdog is active (ie was specified at boot) */ 56 static inline int nmi_watchdog_active(void) 57 { 58 /* 59 * actually it should be: 60 * return (nmi_watchdog == NMI_LOCAL_APIC || 61 * nmi_watchdog == NMI_IO_APIC) 62 * but since they are power of two we could use a 63 * cheaper way --cvg 64 */ 65 return nmi_watchdog & (NMI_LOCAL_APIC | NMI_IO_APIC); 66 } 67 #endif 68 69 void lapic_watchdog_stop(void); 70 int lapic_watchdog_init(unsigned nmi_hz); 71 int lapic_wd_event(unsigned nmi_hz); 72 unsigned lapic_adjust_nmi_hz(unsigned hz); 73 void disable_lapic_nmi_watchdog(void); 74 void enable_lapic_nmi_watchdog(void); 75 void stop_nmi(void); 76 void restart_nmi(void); 77 78 #endif /* _ASM_X86_NMI_H */ 79