arch/x86/include/asm/nmi.h

   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 struct file;
  44 extern int proc_nmi_enabled(struct ctl_table *, int , struct file *,
  45                         void __user *, size_t *, loff_t *);
  46 extern int unknown_nmi_panic;
  47
  48 void __trigger_all_cpu_backtrace(void);
  49 #define trigger_all_cpu_backtrace() __trigger_all_cpu_backtrace()
  50
  51 static inline void localise_nmi_watchdog(void)
  52 {
  53         if (nmi_watchdog == NMI_IO_APIC)
  54                 nmi_watchdog = NMI_LOCAL_APIC;
  55 }
  56
  57 /* check if nmi_watchdog is active (ie was specified at boot) */
  58 static inline int nmi_watchdog_active(void)
  59 {
  60         /*
  61          * actually it should be:
  62          *      return (nmi_watchdog == NMI_LOCAL_APIC ||
  63          *              nmi_watchdog == NMI_IO_APIC)
  64          * but since they are power of two we could use a
  65          * cheaper way --cvg
  66          */
  67         return nmi_watchdog & (NMI_LOCAL_APIC | NMI_IO_APIC);
  68 }
  69 #endif
  70
  71 void lapic_watchdog_stop(void);
  72 int lapic_watchdog_init(unsigned nmi_hz);
  73 int lapic_wd_event(unsigned nmi_hz);
  74 unsigned lapic_adjust_nmi_hz(unsigned hz);
  75 void disable_lapic_nmi_watchdog(void);
  76 void enable_lapic_nmi_watchdog(void);
  77 void stop_nmi(void);
  78 void restart_nmi(void);
  79
  80 #endif /* _ASM_X86_NMI_H */