| /* | |
| FreeRTOS V8.0.1 - Copyright (C) 2014 Real Time Engineers Ltd. | |
| All rights reserved | |
| VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION. | |
| *************************************************************************** | |
| * * | |
| * FreeRTOS provides completely free yet professionally developed, * | |
| * robust, strictly quality controlled, supported, and cross * | |
| * platform software that has become a de facto standard. * | |
| * * | |
| * Help yourself get started quickly and support the FreeRTOS * | |
| * project by purchasing a FreeRTOS tutorial book, reference * | |
| * manual, or both from: http://www.FreeRTOS.org/Documentation * | |
| * * | |
| * Thank you! * | |
| * * | |
| *************************************************************************** | |
| 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 modification 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. !<< | |
| 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. Full license text is available from the following | |
| link: http://www.freertos.org/a00114.html | |
| 1 tab == 4 spaces! | |
| *************************************************************************** | |
| * * | |
| * Having a problem? Start by reading the FAQ "My application does * | |
| * not run, what could be wrong?" * | |
| * * | |
| * http://www.FreeRTOS.org/FAQHelp.html * | |
| * * | |
| *************************************************************************** | |
| http://www.FreeRTOS.org - Documentation, books, training, latest versions, | |
| license and Real Time Engineers Ltd. contact details. | |
| http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products, | |
| including FreeRTOS+Trace - an indispensable productivity tool, a DOS | |
| compatible FAT file system, and our tiny thread aware UDP/IP stack. | |
| http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High | |
| Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS | |
| licenses offer ticketed support, indemnification and middleware. | |
| http://www.SafeRTOS.com - High Integrity Systems also provide a safety | |
| engineered and independently SIL3 certified version for use in safety and | |
| mission critical applications that require provable dependability. | |
| 1 tab == 4 spaces! | |
| */ | |
| #include "FreeRTOSConfig.h" | |
| #include "ISR_Support.h" | |
| .global _vPortYield | |
| .global _vPortStartFirstTask | |
| .global _vPortTickISR | |
| .extern _vTaskSwitchContext | |
| .extern _xTaskIncrementTick | |
| .text | |
| .align 2 | |
| /* FreeRTOS yield handler. This is installed as the BRK software interrupt | |
| handler. */ | |
| _vPortYield: | |
| /* Save the context of the current task. */ | |
| portSAVE_CONTEXT | |
| /* Call the scheduler to select the next task. */ | |
| call !!_vTaskSwitchContext | |
| /* Restore the context of the next task to run. */ | |
| portRESTORE_CONTEXT | |
| retb | |
| /* Starts the scheduler by restoring the context of the task that will execute | |
| first. */ | |
| .align 2 | |
| _vPortStartFirstTask: | |
| /* Restore the context of whichever task will execute first. */ | |
| portRESTORE_CONTEXT | |
| /* An interrupt stack frame is used so the task is started using RETI. */ | |
| reti | |
| /* FreeRTOS tick handler. This is installed as the interval timer interrupt | |
| handler. */ | |
| .align 2 | |
| _vPortTickISR: | |
| /* Save the context of the currently executing task. */ | |
| portSAVE_CONTEXT | |
| /* Call the RTOS tick function. */ | |
| call !!_xTaskIncrementTick | |
| #if configUSE_PREEMPTION == 1 | |
| /* Select the next task to run. */ | |
| call !!_vTaskSwitchContext | |
| #endif | |
| /* Retore the context of whichever task will run next. */ | |
| portRESTORE_CONTEXT | |
| reti | |
| .end | |