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/*
* FreeRTOS Kernel <DEVELOPMENT BRANCH>
* Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* SPDX-License-Identifier: MIT
*
* 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
*
*/
#if defined( __dsPIC30F__ ) || defined( __dsPIC33F__ )
.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 ACCAL
PUSH ACCAH
PUSH ACCAU
PUSH ACCBL
PUSH ACCBH
PUSH ACCBU
PUSH DCOUNT
PUSH DOSTARTL
PUSH DOSTARTH
PUSH DOENDL
PUSH DOENDH
PUSH CORCON
PUSH PSVPAG
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
POP PSVPAG
POP CORCON
POP DOENDH
POP DOENDL
POP DOSTARTH
POP DOSTARTL
POP DCOUNT
POP ACCBU
POP ACCBH
POP ACCBL
POP ACCAU
POP ACCAH
POP ACCAL
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( __dsPIC30F__ ) || defined( __dsPIC33F__ ) */
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