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/*
* FreeRTOS Kernel V10.5.1
* Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* SPDX-License-Identifier: MIT
*
* 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.
*
* https://www.FreeRTOS.org
* https://github.com/FreeRTOS
*
*/
#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
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