| /* | |
| FreeRTOS V5.4.2 - Copyright (C) 2009 Real Time Engineers Ltd. | |
| This file is part of the FreeRTOS distribution. | |
| FreeRTOS is free software; you can redistribute it and/or modify it under | |
| the terms of the GNU General Public License (version 2) as published by the | |
| Free Software Foundation and modified by the FreeRTOS exception. | |
| **NOTE** The exception to the GPL is included to allow you to distribute a | |
| combined work that includes FreeRTOS without being obliged to provide the | |
| source code for proprietary components outside of the FreeRTOS kernel. | |
| Alternative commercial license and support terms are also available upon | |
| request. See the licensing section of http://www.FreeRTOS.org for full | |
| license details. | |
| FreeRTOS is distributed in the hope that it will be useful, but WITHOUT | |
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
| more details. | |
| You should have received a copy of the GNU General Public License along | |
| with FreeRTOS; if not, write to the Free Software Foundation, Inc., 59 | |
| Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
| *************************************************************************** | |
| * * | |
| * Looking for a quick start? Then check out the FreeRTOS eBook! * | |
| * See http://www.FreeRTOS.org/Documentation for details * | |
| * * | |
| *************************************************************************** | |
| 1 tab == 4 spaces! | |
| Please ensure to read the configuration and relevant port sections of the | |
| online documentation. | |
| http://www.FreeRTOS.org - Documentation, latest information, license and | |
| contact details. | |
| http://www.SafeRTOS.com - A version that is certified for use in safety | |
| critical systems. | |
| http://www.OpenRTOS.com - Commercial support, development, porting, | |
| licensing and training services. | |
| */ | |
| #include "FreeRTOSConfig.h" | |
| #include "portasm.h" | |
| .CODE | |
| /* | |
| * The RTOS tick ISR. | |
| * | |
| * If the cooperative scheduler is in use this simply increments the tick | |
| * count. | |
| * | |
| * If the preemptive scheduler is in use a context switch can also occur. | |
| */ | |
| _vTickISR: | |
| portSAVE_CONTEXT | |
| call #_vTaskIncrementTick | |
| #if configUSE_PREEMPTION == 1 | |
| call #_vTaskSwitchContext | |
| #endif | |
| portRESTORE_CONTEXT | |
| /*-----------------------------------------------------------*/ | |
| /* | |
| * Manual context switch called by the portYIELD() macro. | |
| */ | |
| _vPortYield:: | |
| /* Mimic an interrupt by pushing the SR. */ | |
| push SR | |
| /* Now the SR is stacked we can disable interrupts. */ | |
| dint | |
| /* Save the context of the current task. */ | |
| portSAVE_CONTEXT | |
| /* Switch to the highest priority task that is ready to run. */ | |
| call #_vTaskSwitchContext | |
| /* Restore the context of the new task. */ | |
| portRESTORE_CONTEXT | |
| /*-----------------------------------------------------------*/ | |
| /* | |
| * Start off the scheduler by initialising the RTOS tick timer, then restoring | |
| * the context of the first task. | |
| */ | |
| _xPortStartScheduler:: | |
| /* Setup the hardware to generate the tick. Interrupts are disabled | |
| when this function is called. */ | |
| call #_prvSetupTimerInterrupt | |
| /* Restore the context of the first task that is going to run. */ | |
| portRESTORE_CONTEXT | |
| /*-----------------------------------------------------------*/ | |
| /* Place the tick ISR in the correct vector. */ | |
| .VECTORS | |
| .KEEP | |
| ORG TIMERA0_VECTOR | |
| DW _vTickISR | |
| END | |