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 PORT_ASM_H
30 #define PORT_ASM_H
31 
32 portSAVE_CONTEXT macro
33                 /* Save the remaining registers. */
34         push    r4
35         push    r5
36         push    r6
37         push    r7
38         push    r8
39         push    r9
40         push    r10
41         push    r11
42         push    r12
43         push    r13
44         push    r14
45         push    r15
46         mov.w   &_usCriticalNesting, r14
47         push    r14
48         mov.w   &_pxCurrentTCB, r12
49         mov.w   r1, @r12
50         endm
51 /*-----------------------------------------------------------*/
52 
53 portRESTORE_CONTEXT macro
54         mov.w   &_pxCurrentTCB, r12
55         mov.w   @r12, r1
56         pop     r15
57         mov.w   r15, &_usCriticalNesting
58         pop     r15
59         pop     r14
60         pop     r13
61         pop     r12
62         pop     r11
63         pop     r10
64         pop     r9
65         pop     r8
66         pop     r7
67         pop     r6
68         pop     r5
69         pop     r4
70 
71         /* The last thing on the stack will be the status register.
72                 Ensure the power down bits are clear ready for the next
73                 time this power down register is popped from the stack. */
74         bic.w   #0xf0,0(SP)
75 
76         reti
77         endm
78 /*-----------------------------------------------------------*/
79 
80 #endif
81