/*********************************************************************** F* Function: void wd_handler(unsigned long ptr) P*A*Z* * P* Parameters: unsigned long ptr P* - Parameter passed in from the timer invocation, ignored P* P* Returnvalue: none * Z* Intention: This is the core functionality of the watchdog. It is Z* called from the timer wd_timer and handles the necessary Z* processing, including resetting the hardware watchdog. Z* When chains are registered, they override the Z* default behaviour and are processed in process_mon_chains(). * D* Design: Haider / [email protected] C* Coding: Haider / [email protected] V* Verification: [email protected] / [email protected] ***********************************************************************/ void wd_handler(unsigned long ptr) { debugk("%s: timer_count=%ld jiffies\n", __FUNCTION__, timer_count); if ((timer_count == 0) && enabled) { printk("WD: Reseting system...\n"); BUG_ON(wd_hw_functions.wd_machine_restart == NULL); wd_hw_functions.wd_machine_restart(); } else if ((timer_count > 0) || (!enabled)) { /* execute WD service sequence */ BUG_ON(wd_hw_functions.wd_kick == NULL); wd_hw_functions.wd_kick(); wd_timer.expires = jiffies + timer_period; add_timer(&wd_timer); /* ...re-activate timer */ /* * process the monitor list */ process_mon_chains(); /* * don't timeout if disabled */ if (!enabled) return; /* don't timeout if interface was never opened */ if (!opened) return; /* * don't timeout if new interface is used or if device * is not opened */ if (((timeout_open_only && (!device_open)) || mon_chains)) return; /* decrement variable for timer-control */ if (timer_count > timer_period) timer_count -= timer_period; else timer_count = 0; if (timer_count == 0) printk("WD: watchdog about to expire\n"); } return; }
/*********************************************************************** F* Function: void wdt_mpc8xx_handler (unsigned long ptr) P*A*Z* * P* Parameters: unsigned long ptr P* - Parameter passed in from the timer invocation, ignored P* P* Returnvalue: none * Z* Intention: This is the core functionality of the watchdog. It is Z* called from the timer wd_timer and handles the necessary Z* processing, including resetting the hardware watchdog. Z* When chains are registered, they override the Z* default behaviour and are processed in process_mon_chains(). * D* Design: Haider / [email protected] C* Coding: Haider / [email protected] V* Verification: [email protected] / [email protected] ***********************************************************************/ void wdt_mpc8xx_handler (unsigned long ptr) { #ifndef CONFIG_LWMON /* This produces too much output on the LWMON */ debugk ("%s: timer_count=%d jiffies\n", __FUNCTION__, timer_count); #endif /* * Signal arch/ppc/kernel/time.c that this driver has taken * over the responsibility to trigger the watchdog */ wdt_mpc8xx_is_ready = 1; if ((timer_count == 0) && enabled) { /* try "graceful" shutdown */ printk ("WDT_8xx: Reset system...\n"); #ifdef CONFIG_8xx m8xx_restart (NULL); #else machine_restart (NULL); #endif } if ((timer_count > 0) || (!enabled)) { /* execute WDT service sequence */ wdt_mpc8xx_reset (); wd_timer.expires = jiffies + timer_period; add_timer (&wd_timer); /* ...re-activate timer */ /* * process the monitor list */ process_mon_chains(); /* * don't timeout if disabled */ if (!enabled) return; /* * don't timeout if new interface is used or if device * is not opened */ if ((timeout_open_only && (!device_open)) || mon_chains) return; /* decrement variable for timer-control */ if (timer_count > timer_period) timer_count -= timer_period; else timer_count = 0; if (timer_count == 0) { printk ("WDT_8xx: watchdog about to expire\n"); } } return; }
