| ;/* |
| ; * FreeRTOS SMP Kernel V202110.00 |
| ; * 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. |
| ; * |
| ; * https://www.FreeRTOS.org |
| ; * https://github.com/FreeRTOS |
| ; * |
| ; * 1 tab == 4 spaces! |
| ; */ |
| |
| #include "ISR_Support.h" |
| |
| #define CS 0xFFFFC |
| #define ES 0xFFFFD |
| |
| PUBLIC vPortYield |
| PUBLIC vPortStartFirstTask |
| PUBLIC vPortTickISR |
| |
| EXTERN vTaskSwitchContext |
| EXTERN xTaskIncrementTick |
| |
| ; FreeRTOS yield handler. This is installed as the BRK software interrupt |
| ; handler. |
| RSEG CODE:CODE |
| vPortYield: |
| portSAVE_CONTEXT ; Save the context of the current task. |
| call vTaskSwitchContext ; Call the scheduler to select the next task. |
| portRESTORE_CONTEXT ; Restore the context of the next task to run. |
| retb |
| |
| |
| ; Starts the scheduler by restoring the context of the task that will execute |
| ; first. |
| RSEG CODE:CODE |
| vPortStartFirstTask: |
| portRESTORE_CONTEXT ; Restore the context of whichever task the ... |
| reti ; An interrupt stack frame is used so the task |
| ; is started using a RETI instruction. |
| |
| ; FreeRTOS tick handler. This is installed as the interval timer interrupt |
| ; handler. |
| RSEG CODE:CODE |
| vPortTickISR: |
| |
| portSAVE_CONTEXT ; Save the context of the current task. |
| call xTaskIncrementTick ; Call the timer tick function. |
| cmpw ax, #0x00 |
| skz |
| call vTaskSwitchContext ; Call the scheduler to select the next task. |
| portRESTORE_CONTEXT ; Restore the context of the next task to run. |
| reti |
| |
| |
| ; Install the interrupt handlers |
| |
| COMMON INTVEC:CODE:ROOT(1) |
| ORG configTICK_VECTOR |
| DW vPortTickISR |
| |
| COMMON INTVEC:CODE:ROOT(1) |
| ORG 126 |
| DW vPortYield |
| |
| |
| END |