| /* | |
| * FreeRTOS Kernel V10.3.1 | |
| * Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved. | |
| * | |
| * Permission is hereby granted, free of charge, to any person obtaining a copy of | |
| * this software and associated documentation files (the "Software"), to deal in | |
| * the Software without restriction, including without limitation the rights to | |
| * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of | |
| * the Software, and to permit persons to whom the Software is furnished to do so, | |
| * subject to the following conditions: | |
| * | |
| * The above copyright notice and this permission notice shall be included in all | |
| * copies or substantial portions of the Software. | |
| * | |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS | |
| * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR | |
| * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER | |
| * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
| * | |
| * http://www.FreeRTOS.org | |
| * http://aws.amazon.com/freertos | |
| * | |
| * 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 | |