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102 lines
3.5 KiB
C
102 lines
3.5 KiB
C
/*
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FreeRTOS.org V4.7.0 - Copyright (C) 2003-2007 Richard Barry.
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This file is part of the FreeRTOS.org distribution.
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FreeRTOS.org is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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FreeRTOS.org is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FreeRTOS.org; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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A special exception to the GPL can be applied should you wish to distribute
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a combined work that includes FreeRTOS.org, without being obliged to provide
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the source code for any proprietary components. See the licensing section
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of http://www.FreeRTOS.org for full details of how and when the exception
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can be applied.
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***************************************************************************
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See http://www.FreeRTOS.org for documentation, latest information, license
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and contact details. Please ensure to read the configuration and relevant
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port sections of the online documentation.
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Also see http://www.SafeRTOS.com a version that has been certified for use
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in safety critical systems, plus commercial licensing, development and
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support options.
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***************************************************************************
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*/
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#include "FreeRTOS.h"
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#include "Semphr.h"
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#include "Task.h"
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/* Wrapper for the EMAC interrupt. */
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void vEMACISR_Wrapper( void ) __attribute__((naked));
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/* Handler called by the ISR wrapper. This must be kept a separate
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function to ensure the stack frame is correctly set up. */
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void vEMACISR_Handler( void );
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static xSemaphoreHandle xEMACSemaphore;
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/*-----------------------------------------------------------*/
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void vPassEMACSemaphore( xSemaphoreHandle xSemaphore )
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{
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xEMACSemaphore = xSemaphore;
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}
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/*-----------------------------------------------------------*/
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void vEMACISR_Handler( void )
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{
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volatile unsigned portLONG ulIntStatus, ulRxStatus;
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portBASE_TYPE xSwitchRequired = pdFALSE;
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ulIntStatus = AT91C_BASE_EMAC->EMAC_ISR;
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ulRxStatus = AT91C_BASE_EMAC->EMAC_RSR;
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if( ( ulIntStatus & AT91C_EMAC_RCOMP ) || ( ulRxStatus & AT91C_EMAC_REC ) )
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{
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/* A frame has been received, signal the uIP task so it can process
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the Rx descriptors. */
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xSwitchRequired = xSemaphoreGiveFromISR( xEMACSemaphore, pdFALSE );
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AT91C_BASE_EMAC->EMAC_RSR = AT91C_EMAC_REC;
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}
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/* Clear the interrupt. */
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AT91C_BASE_AIC->AIC_EOICR = 0;
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/* Switch to the uIP task. */
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if( xSwitchRequired )
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{
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/* If a task of higher priority than the interrupted task was
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unblocked by the ISR then this call will ensure that the
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unblocked task is the task the ISR returns to. */
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portYIELD_FROM_ISR();
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}
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}
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/*-----------------------------------------------------------*/
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void vEMACISR_Wrapper( void )
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{
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/* Save the context of the interrupted task. */
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portSAVE_CONTEXT();
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/* Call the handler task to do the actual work. This must be a separate
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function to ensure the stack frame is correctly set up. */
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vEMACISR_Handler();
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/* Restore the context of whichever task is the next to run. */
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portRESTORE_CONTEXT();
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}
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