1 /*
2 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
3 * Copyright (c) 2020-2023 Huawei Device Co., Ltd. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this list of
9 * conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
12 * of conditions and the following disclaimer in the documentation and/or other materials
13 * provided with the distribution.
14 *
15 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
16 * to endorse or promote products derived from this software without specific prior written
17 * permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #ifndef _LOS_ARCH_H
33 #define _LOS_ARCH_H
34
35 #include "los_config.h"
36 #include "los_timer.h"
37
38 #ifdef __cplusplus
39 #if __cplusplus
40 extern "C" {
41 #endif /* __cplusplus */
42 #endif /* __cplusplus */
43
44 #if defined(__ICCARM__) || defined(__CC_ARM)
ArchSpGet(VOID)45 STATIC INLINE UINTPTR ArchSpGet(VOID)
46 {
47 UINTPTR sp;
48 __asm("mov %0, sp" : "=r" (sp));
49 return sp;
50 }
51
ArchPspGet(VOID)52 STATIC INLINE UINTPTR ArchPspGet(VOID)
53 {
54 UINTPTR psp;
55 __asm("mrs %0, psp" : "=r" (psp));
56 return psp;
57 }
58
ArchMspGet(VOID)59 STATIC INLINE UINTPTR ArchMspGet(VOID)
60 {
61 UINTPTR msp;
62 __asm("mrs %0, msp" : "=r" (msp));
63 return msp;
64 }
65
66 #define ARCH_LR_GET() \
67 ({ \
68 UINTPTR lr; \
69 __asm("mov %0, lr" : "=r" (lr)); \
70 (lr); \
71 })
72 #define ArchLRGet ARCH_LR_GET
73 #elif defined(__CLANG_ARM) || defined(__GNUC__)
74 STATIC INLINE UINTPTR ArchSpGet(VOID)
75 {
76 UINTPTR sp;
77 __asm volatile("mov %0, sp" : "=r" (sp));
78 return sp;
79 }
80
81 STATIC INLINE UINTPTR ArchPspGet(VOID)
82 {
83 UINTPTR psp;
84 __asm volatile("mrs %0, psp" : "=r" (psp));
85 return psp;
86 }
87
88 STATIC INLINE UINTPTR ArchMspGet(VOID)
89 {
90 UINTPTR msp;
91 __asm volatile("mrs %0, msp" : "=r" (msp));
92 return msp;
93 }
94
95 #define ARCH_LR_GET() \
96 ({ \
97 UINTPTR lr; \
98 __asm volatile("mov %0, lr" : "=r" (lr)); \
99 (lr); \
100 })
101 #define ArchLRGet ARCH_LR_GET
102 #else
103 /* Other platforms to be improved */
104 #endif
105
106 VOID ArchInit(VOID);
107
108 #ifdef __cplusplus
109 #if __cplusplus
110 }
111 #endif /* __cplusplus */
112 #endif /* __cplusplus */
113
114 #endif /* _LOS_ARCH_H */
115
116