| ; FreeRTOS.org V5.1.2 - Copyright (C) 2003-2009 Richard Barry. | |
| ; | |
| ; This file is part of the FreeRTOS.org distribution. | |
| ; | |
| ; FreeRTOS.org is free software; you can redistribute it and/or modify | |
| ; it under the terms of the GNU General Public License as published by | |
| ; the Free Software Foundation; either version 2 of the License, or | |
| ; (at your option) any later version. | |
| ; | |
| ; FreeRTOS.org 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. See the | |
| ; GNU General Public License for more details. | |
| ; | |
| ; You should have received a copy of the GNU General Public License | |
| ; along with FreeRTOS.org; if not, write to the Free Software | |
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| ; A special exception to the GPL can be applied should you wish to distribute | |
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| ; *************************************************************************** | |
| ; See http://www.FreeRTOS.org for documentation, latest information, license | |
| ; and contact details. Please ensure to read the configuration and relevant | |
| ; port sections of the online documentation. | |
| ; *************************************************************************** | |
| RSEG ICODE:CODE | |
| CODE32 | |
| EXTERN vPortPreemptiveTick | |
| EXTERN vTaskSwitchContext | |
| PUBLIC vPortYieldProcessor | |
| PUBLIC vPortStartFirstTask | |
| #include "ISR_Support.h" | |
| ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
| ; Starting the first task is just a matter of restoring the context that | |
| ; was created by pxPortInitialiseStack(). | |
| ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
| vPortStartFirstTask: | |
| portRESTORE_CONTEXT | |
| ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
| ; Manual context switch function. This is the SWI hander. | |
| ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | |
| vPortYieldProcessor: | |
| ADD LR, LR, #4 ; Add 4 to the LR to make the LR appear exactly | |
| ; as if the context was saved during and IRQ | |
| ; handler. | |
| portSAVE_CONTEXT ; Save the context of the current task... | |
| LDR R0, =vTaskSwitchContext ; before selecting the next task to execute. | |
| mov lr, pc | |
| BX R0 | |
| portRESTORE_CONTEXT ; Restore the context of the selected task. | |
| END | |