83 lines
2.8 KiB
Plaintext
83 lines
2.8 KiB
Plaintext
;/*
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; * FreeRTOS Kernel V10.2.1
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; * Copyright (C) 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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; *
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; * Permission is hereby granted, free of charge, to any person obtaining a copy of
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; * this software and associated documentation files (the "Software"), to deal in
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; * the Software without restriction, including without limitation the rights to
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; * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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; * the Software, and to permit persons to whom the Software is furnished to do so,
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; * subject to the following conditions:
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; *
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; * The above copyright notice and this permission notice shall be included in all
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; * copies or substantial portions of the Software.
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; *
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; * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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; * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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; * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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; * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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; * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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; * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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; *
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; * http://www.FreeRTOS.org
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; * http://aws.amazon.com/freertos
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; *
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; * 1 tab == 4 spaces!
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; */
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#include "ISR_Support.h"
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#define CS 0xFFFFC
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#define ES 0xFFFFD
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PUBLIC vPortYield
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PUBLIC vPortStartFirstTask
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PUBLIC vPortTickISR
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EXTERN vTaskSwitchContext
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EXTERN xTaskIncrementTick
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; FreeRTOS yield handler. This is installed as the BRK software interrupt
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; handler.
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RSEG CODE:CODE
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vPortYield:
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portSAVE_CONTEXT ; Save the context of the current task.
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call vTaskSwitchContext ; Call the scheduler to select the next task.
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portRESTORE_CONTEXT ; Restore the context of the next task to run.
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retb
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; Starts the scheduler by restoring the context of the task that will execute
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; first.
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RSEG CODE:CODE
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vPortStartFirstTask:
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portRESTORE_CONTEXT ; Restore the context of whichever task the ...
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reti ; An interrupt stack frame is used so the task
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; is started using a RETI instruction.
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; FreeRTOS tick handler. This is installed as the interval timer interrupt
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; handler.
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RSEG CODE:CODE
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vPortTickISR:
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portSAVE_CONTEXT ; Save the context of the current task.
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call xTaskIncrementTick ; Call the timer tick function.
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cmpw ax, #0x00
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skz
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call vTaskSwitchContext ; Call the scheduler to select the next task.
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portRESTORE_CONTEXT ; Restore the context of the next task to run.
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reti
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; Install the interrupt handlers
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COMMON INTVEC:CODE:ROOT(1)
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ORG configTICK_VECTOR
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DW vPortTickISR
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COMMON INTVEC:CODE:ROOT(1)
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ORG 126
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DW vPortYield
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END |