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50 lines
1.6 KiB
50 lines
1.6 KiB
#ifndef __WATCHDOG_H__
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#define __WATCHDOG_H__
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#include "kernel/kernel.h"
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#include "arch_watchdog.h"
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extern int watchdog_enabled; /* if set to non-zero the watch dog is enabled */
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extern unsigned watchdog_local_timer_ticks; /* is timer still ticking? */
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/*
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* as the implementation is not only architecture dependent but like in x86 case
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* very much model specific, we need to keep a collection of methods that
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* implement it in runtime after the correct arch/model was detected
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*/
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typedef void (* arch_watchdog_method_t)(const unsigned);
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typedef int (* arch_watchdog_profile_init_t)(const unsigned);
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struct arch_watchdog {
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arch_watchdog_method_t init; /* initial setup */
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arch_watchdog_method_t reinit; /* reinit after a tick */
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arch_watchdog_profile_init_t profile_init;
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u64_t resetval;
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u64_t watchdog_resetval;
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u64_t profile_resetval;
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};
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extern struct arch_watchdog *watchdog;
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/* let the arch code do whatever it needs to setup or quit the watchdog */
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int arch_watchdog_init(void);
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void arch_watchdog_stop(void);
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#ifdef __i386__
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/* if the watchdog detects lockup, let the arch code to handle it */
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void arch_watchdog_lockup(const struct nmi_frame * frame);
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/* generic NMI handler. Takes one argument which points to where the arch
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* specific low level handler dumped CPU information and can be inspected by the
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* arch specific code of the watchdog implementation */
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void nmi_watchdog_handler(struct nmi_frame * frame);
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#endif
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/*
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* start and stop profiling using the NMI watchdog
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*/
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int nmi_watchdog_start_profiling(const unsigned freq);
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void nmi_watchdog_stop_profiling(void);
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#endif /* __WATCHDOG_H__ */
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