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;/*
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; * FreeRTOS Kernel <DEVELOPMENT BRANCH>
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; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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; *
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; * SPDX-License-Identifier: MIT
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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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; * https://www.FreeRTOS.org
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; * https://github.com/FreeRTOS
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; *
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; */
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.macro portSAVE_CONTEXT
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; Save r0 to r14 and pr.
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movml.l r15, @-r15
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; Save mac1, mach and gbr
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sts.l macl, @-r15
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sts.l mach, @-r15
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stc.l gbr, @-r15
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; Get the address of pxCurrentTCB
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mov.l #_pxCurrentTCB, r0
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; Get the address of pxTopOfStack from the TCB.
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mov.l @r0, r0
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; Save the stack pointer in pxTopOfStack.
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mov.l r15, @r0
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.endm
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;-----------------------------------------------------------
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.macro portRESTORE_CONTEXT
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; Get the address of the pxCurrentTCB variable.
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mov.l #_pxCurrentTCB, r0
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; Get the address of the task stack from pxCurrentTCB.
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mov.l @r0, r0
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; Get the task stack itself into the stack pointer.
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mov.l @r0, r15
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; Restore system registers.
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ldc.l @r15+, gbr
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lds.l @r15+, mach
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lds.l @r15+, macl
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; Restore r0 to r14 and PR
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movml.l @r15+, r15
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; Pop the SR and PC to jump to the start of the task.
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rte
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nop
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.endm
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;-----------------------------------------------------------
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