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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSScoreWatchdog
*
* @brief This source file contains the implementation of
* _Watchdog_Do_tickle() and _Watchdog_Tick().
*/
/*
* Copyright (c) 2015, 2016 embedded brains GmbH. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/score/watchdogimpl.h>
#include <rtems/score/schedulerimpl.h>
#include <rtems/score/threaddispatch.h>
#include <rtems/score/timecounter.h>
void _Watchdog_Do_tickle(
Watchdog_Header *header,
Watchdog_Control *first,
uint64_t now,
#ifdef RTEMS_SMP
ISR_lock_Control *lock,
#endif
ISR_lock_Context *lock_context
)
{
do {
if ( first->expire <= now ) {
Watchdog_Service_routine_entry routine;
_Watchdog_Next_first( header, first );
_RBTree_Extract( &header->Watchdogs, &first->Node.RBTree );
_Watchdog_Set_state( first, WATCHDOG_INACTIVE );
routine = first->routine;
_ISR_lock_Release_and_ISR_enable( lock, lock_context );
( *routine )( first );
_ISR_lock_ISR_disable_and_acquire( lock, lock_context );
} else {
break;
}
first = _Watchdog_Header_first( header );
} while ( first != NULL );
}
void _Watchdog_Tick( Per_CPU_Control *cpu )
{
ISR_lock_Context lock_context;
Watchdog_Header *header;
Watchdog_Control *first;
uint64_t ticks;
struct timespec now;
Thread_Control *executing;
const Thread_CPU_budget_operations *cpu_budget_operations;
if ( _Per_CPU_Is_boot_processor( cpu ) ) {
++_Watchdog_Ticks_since_boot;
}
_ISR_lock_ISR_disable_and_acquire( &cpu->Watchdog.Lock, &lock_context );
ticks = cpu->Watchdog.ticks;
_Assert( ticks < UINT64_MAX );
++ticks;
cpu->Watchdog.ticks = ticks;
header = &cpu->Watchdog.Header[ PER_CPU_WATCHDOG_TICKS ];
first = _Watchdog_Header_first( header );
if ( first != NULL ) {
_Watchdog_Tickle(
header,
first,
ticks,
&cpu->Watchdog.Lock,
&lock_context
);
}
header = &cpu->Watchdog.Header[ PER_CPU_WATCHDOG_MONOTONIC ];
first = _Watchdog_Header_first( header );
if ( first != NULL ) {
_Timecounter_Getnanouptime( &now );
_Watchdog_Tickle(
header,
first,
_Watchdog_Ticks_from_timespec( &now ),
&cpu->Watchdog.Lock,
&lock_context
);
}
header = &cpu->Watchdog.Header[ PER_CPU_WATCHDOG_REALTIME ];
first = _Watchdog_Header_first( header );
if ( first != NULL ) {
_Timecounter_Getnanotime( &now );
_Watchdog_Tickle(
header,
first,
_Watchdog_Ticks_from_timespec( &now ),
&cpu->Watchdog.Lock,
&lock_context
);
}
_ISR_lock_Release_and_ISR_enable( &cpu->Watchdog.Lock, &lock_context );
/*
* Each online processor has at least an idle thread as the executing thread
* even in case it has currently no scheduler assigned. Clock interrupts on
* processors which are not online would be a severe bug of the Clock Driver.
*/
executing = _Per_CPU_Get_executing( cpu );
_Assert( executing != NULL );
cpu_budget_operations = executing->CPU_budget.operations;
if ( cpu_budget_operations != NULL ) {
( *cpu_budget_operations->at_tick )( executing );
}
}
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