1 /*
2  * FreeRTOS Kernel V11.1.0
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