1 /*
2  * FreeRTOS Kernel V11.0.1
3  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
4  *
5  * SPDX-License-Identifier: MIT
6  *
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:
13  *
14  * The above copyright notice and this permission notice shall be included in all
15  * copies or substantial portions of the Software.
16  *
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.
23  *
24  * https://www.FreeRTOS.org
25  * https://github.com/FreeRTOS
26  *
27  */
28 
29 #ifndef PORTASM_H
30 #define PORTASM_H
31 
32 portSAVE_CONTEXT macro
33 
34 IMPORT pxCurrentTCB
35 IMPORT usCriticalNesting
36 
37 /* Save the remaining registers. */
38 push r4
39 push r5
40 push r6
41 push r7
42 push r8
43 push r9
44 push r10
45 push r11
46 push r12
47 push r13
48 push r14
49 push r15
50 mov.w &usCriticalNesting, r14
51 push r14
52        mov.w &pxCurrentTCB, r12
53        mov.w r1, 0 ( r12 )
54 endm
55 /*-----------------------------------------------------------*/
56 
57 portRESTORE_CONTEXT macro
58 mov.w & pxCurrentTCB, r12
59 mov.w @r12, r1
60 pop r15
61 mov.w r15, &usCriticalNesting
62 pop r15
63 pop r14
64 pop r13
65 pop r12
66 pop r11
67 pop r10
68 pop r9
69 pop r8
70 pop r7
71 pop r6
72 pop r5
73 pop r4
74 
75 /* The last thing on the stack will be the status register.
76  * Ensure the power down bits are clear ready for the next
77  * time this power down register is popped from the stack. */
78 bic.w   # 0xf0, 0 ( SP )
79 
80 reti
81 endm
82 /*-----------------------------------------------------------*/
83 
84 #endif /* ifndef PORTASM_H */
85