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 avail_to_resrv_perfctr_nmi(unsigned int); 23 extern int reserve_perfctr_nmi(unsigned int); 24 extern void release_perfctr_nmi(unsigned int); 25 extern int reserve_evntsel_nmi(unsigned int); 26 extern void release_evntsel_nmi(unsigned int); 27 28 extern void setup_apic_nmi_watchdog(void *); 29 extern void stop_apic_nmi_watchdog(void *); 30 extern void disable_timer_nmi_watchdog(void); 31 extern void enable_timer_nmi_watchdog(void); 32 extern int nmi_watchdog_tick(struct pt_regs *regs, unsigned reason); 33 extern void cpu_nmi_set_wd_enabled(void); 34 35 extern atomic_t nmi_active; 36 extern unsigned int nmi_watchdog; 37 #define NMI_NONE 0 38 #define NMI_IO_APIC 1 39 #define NMI_LOCAL_APIC 2 40 #define NMI_INVALID 3 41 42 struct ctl_table; 43 extern int proc_nmi_enabled(struct ctl_table *, int , 44 void __user *, size_t *, loff_t *); 45 extern int unknown_nmi_panic; 46 47 void arch_trigger_all_cpu_backtrace(void); 48 #define arch_trigger_all_cpu_backtrace arch_trigger_all_cpu_backtrace 49 50 static inline void localise_nmi_watchdog(void) 51 { 52 if (nmi_watchdog == NMI_IO_APIC) 53 nmi_watchdog = NMI_LOCAL_APIC; 54 } 55 56 /* check if nmi_watchdog is active (ie was specified at boot) */ 57 static inline int nmi_watchdog_active(void) 58 { 59 /* 60 * actually it should be: 61 * return (nmi_watchdog == NMI_LOCAL_APIC || 62 * nmi_watchdog == NMI_IO_APIC) 63 * but since they are power of two we could use a 64 * cheaper way --cvg 65 */ 66 return nmi_watchdog & (NMI_LOCAL_APIC | NMI_IO_APIC); 67 } 68 #endif 69 70 void lapic_watchdog_stop(void); 71 int lapic_watchdog_init(unsigned nmi_hz); 72 int lapic_wd_event(unsigned nmi_hz); 73 unsigned lapic_adjust_nmi_hz(unsigned hz); 74 void disable_lapic_nmi_watchdog(void); 75 void enable_lapic_nmi_watchdog(void); 76 void stop_nmi(void); 77 void restart_nmi(void); 78 79 #endif /* _ASM_X86_NMI_H */ 80