forked from Imagelibrary/rtems
84 lines
2.7 KiB
C
84 lines
2.7 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/**
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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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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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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