1 /*
2  * FreeRTOS Kernel V10.6.2
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
85