/* | |
FreeRTOS V7.5.3 - Copyright (C) 2013 Real Time Engineers Ltd. | |
All rights reserved | |
VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION. | |
*************************************************************************** | |
* * | |
* FreeRTOS provides completely free yet professionally developed, * | |
* robust, strictly quality controlled, supported, and cross * | |
* platform software that has become a de facto standard. * | |
* * | |
* Help yourself get started quickly and support the FreeRTOS * | |
* project by purchasing a FreeRTOS tutorial book, reference * | |
* manual, or both from: http://www.FreeRTOS.org/Documentation * | |
* * | |
* Thank you! * | |
* * | |
*************************************************************************** | |
This file is part of the FreeRTOS distribution. | |
FreeRTOS is free software; you can redistribute it and/or modify it under | |
the terms of the GNU General Public License (version 2) as published by the | |
Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception. | |
>>! NOTE: The modification to the GPL is included to allow you to distribute | |
>>! a combined work that includes FreeRTOS without being obliged to provide | |
>>! the source code for proprietary components outside of the FreeRTOS | |
>>! kernel. | |
FreeRTOS 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. Full license text is available from the following | |
link: http://www.freertos.org/a00114.html | |
1 tab == 4 spaces! | |
*************************************************************************** | |
* * | |
* Having a problem? Start by reading the FAQ "My application does * | |
* not run, what could be wrong?" * | |
* * | |
* http://www.FreeRTOS.org/FAQHelp.html * | |
* * | |
*************************************************************************** | |
http://www.FreeRTOS.org - Documentation, books, training, latest versions, | |
license and Real Time Engineers Ltd. contact details. | |
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products, | |
including FreeRTOS+Trace - an indispensable productivity tool, a DOS | |
compatible FAT file system, and our tiny thread aware UDP/IP stack. | |
http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High | |
Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS | |
licenses offer ticketed support, indemnification and middleware. | |
http://www.SafeRTOS.com - High Integrity Systems also provide a safety | |
engineered and independently SIL3 certified version for use in safety and | |
mission critical applications that require provable dependability. | |
1 tab == 4 spaces! | |
*/ | |
#if defined( __PIC24E__ ) || defined ( __PIC24F__ ) || defined( __PIC24FK__ ) || defined( __PIC24H__ ) | |
.global _vPortYield | |
.extern _vTaskSwitchContext | |
.extern uxCriticalNesting | |
_vPortYield: | |
PUSH SR /* Save the SR used by the task.... */ | |
PUSH W0 /* ....then disable interrupts. */ | |
MOV #32, W0 | |
MOV W0, SR | |
PUSH W1 /* Save registers to the stack. */ | |
PUSH.D W2 | |
PUSH.D W4 | |
PUSH.D W6 | |
PUSH.D W8 | |
PUSH.D W10 | |
PUSH.D W12 | |
PUSH W14 | |
PUSH RCOUNT | |
PUSH TBLPAG | |
PUSH CORCON | |
#ifdef __HAS_EDS__ | |
PUSH DSRPAG | |
PUSH DSWPAG | |
#else | |
PUSH PSVPAG | |
#endif /* __HAS_EDS__ */ | |
MOV _uxCriticalNesting, W0 /* Save the critical nesting counter for the task. */ | |
PUSH W0 | |
MOV _pxCurrentTCB, W0 /* Save the new top of stack into the TCB. */ | |
MOV W15, [W0] | |
call _vTaskSwitchContext | |
MOV _pxCurrentTCB, W0 /* Restore the stack pointer for the task. */ | |
MOV [W0], W15 | |
POP W0 /* Restore the critical nesting counter for the task. */ | |
MOV W0, _uxCriticalNesting | |
#ifdef __HAS_EDS__ | |
POP DSWPAG | |
POP DSRPAG | |
#else | |
POP PSVPAG | |
#endif /* __HAS_EDS__ */ | |
POP CORCON | |
POP TBLPAG | |
POP RCOUNT /* Restore the registers from the stack. */ | |
POP W14 | |
POP.D W12 | |
POP.D W10 | |
POP.D W8 | |
POP.D W6 | |
POP.D W4 | |
POP.D W2 | |
POP.D W0 | |
POP SR | |
return | |
.end | |
#endif /* defined( __PIC24E__ ) || defined ( __PIC24F__ ) || defined( __PIC24FK__ ) || defined( __PIC24H__ ) */ |