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/*
* FreeRTOS Kernel V10.4.3 LTS Patch 2
* 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!
*/
#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__ ) */
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