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/**
* @file
* This routine polls to see if a packet has arrived. If one
* has it informs the executive. It uses a Classic API Timer
*/
/*
* COPYRIGHT (c) 1989-2008, 2016.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <rtems/score/sysstate.h>
#include <rtems/score/watchdogimpl.h>
#include "shm_driver.h"
static void Shm_Poll_Set_timer( Watchdog_Control *the_watchdog )
{
Per_CPU_Control *cpu;
ISR_lock_Context lock_context;
cpu = _Watchdog_Get_CPU( the_watchdog );
_ISR_lock_ISR_disable( &lock_context );
_Watchdog_Per_CPU_acquire_critical( cpu, &lock_context );
_Watchdog_Insert(
&cpu->Watchdog.Header[ PER_CPU_WATCHDOG_TICKS ],
the_watchdog,
cpu->Watchdog.ticks + 1
);
_Watchdog_Per_CPU_release_critical( cpu, &lock_context );
_ISR_lock_ISR_enable( &lock_context );
}
static void Shm_Poll_TSR( Watchdog_Control *the_watchdog )
{
uint32_t tmpfront;
/*
* This should NEVER happen but just in case.
*/
if (!_System_state_Is_up(_System_state_Get()))
return;
tmpfront = Shm_Local_receive_queue->front;
if ( Shm_Convert(tmpfront) != Shm_Locked_queue_End_of_list ) {
rtems_multiprocessing_announce();
Shm_Interrupt_count++;
}
Shm_Poll_Set_timer( the_watchdog );
}
static Watchdog_Control Shm_Poll_Watchdog = WATCHDOG_INITIALIZER(
Shm_Poll_TSR
);
void Shm_install_timer(void)
{
Shm_Poll_Set_timer( &Shm_Poll_Watchdog );
}
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