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