2 ; * FreeRTOS Kernel V11.2.0
3 ; * Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
5 ; * SPDX-License-Identifier: MIT
7 ; * Permission is hereby granted, free of charge, to any person obtaining a copy of
8 ; * this software and associated documentation files (the "Software"), to deal in
9 ; * the Software without restriction, including without limitation the rights to
10 ; * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
11 ; * the Software, and to permit persons to whom the Software is furnished to do so,
12 ; * subject to the following conditions:
14 ; * The above copyright notice and this permission notice shall be included in all
15 ; * copies or substantial portions of the Software.
17 ; * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 ; * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
19 ; * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
20 ; * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
21 ; * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 ; * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 ; * https://www.FreeRTOS.org
25 ; * https://github.com/FreeRTOS
28 .macro portSAVE_CONTEXT
30 ; Save r0 to r14 and pr.
33 ; Save mac1, mach and gbr
38 ; Get the address of pxCurrentTCB
39 mov.l #_pxCurrentTCB, r0
41 ; Get the address of pxTopOfStack from the TCB.
44 ; Save the stack pointer in pxTopOfStack.
49 ;-----------------------------------------------------------
51 .macro portRESTORE_CONTEXT
53 ; Get the address of the pxCurrentTCB variable.
54 mov.l #_pxCurrentTCB, r0
56 ; Get the address of the task stack from pxCurrentTCB.
59 ; Get the task stack itself into the stack pointer.
62 ; Restore system registers.
67 ; Restore r0 to r14 and PR
70 ; Pop the SR and PC to jump to the start of the task.
75 ;-----------------------------------------------------------