kernel/watchdog.h

   1 #ifndef __WATCHDOG_H__
   2 #define __WATCHDOG_H__
   3
   4 #include "kernel.h"
   5 #include "arch_watchdog.h"
   6
   7 extern int watchdog_enabled; /* if set to non-zero the watch dog is enabled */
   8 extern unsigned watchdog_local_timer_ticks; /* is timer still ticking? */
   9
  10 /*
  11  * as the implementation is not only architecture dependent but like in x86 case
  12  * very much model specific, we need to keep a collection of methods that
  13  * implement it in runtime after the correct arch/model was detected
  14  */
  15
  16 typedef void (* arch_watchdog_method_t)(int);
  17
  18 struct arch_watchdog {
  19         arch_watchdog_method_t  init;   /* initial setup */
  20         arch_watchdog_method_t  reinit; /* reinitialization after a tick */
  21         unsigned                resetval;
  22 };
  23
  24 extern struct arch_watchdog *watchdog;
  25
  26 /* let the arch code do whatever it needs to setup the watchdog */
  27 int arch_watchdog_init(void);
  28 /* if the watchdog detects lockup, let the arch code to handle it */
  29 void arch_watchdog_lockup(const struct nmi_frame * frame);
  30
  31 /* generic NMI handler. Takes one agument which points to where the arch
  32  * specific low level handler dumped CPU information and can be inspected by the
  33  * arch specific code of the watchdog implementaion */
  34 void nmi_watchdog_handler(struct nmi_frame * frame);
  35
  36 #endif /* __WATCHDOG_H__ */