xref: /kernel/liteos_m/arch/include/los_arch.h (revision 3d8536b4) 
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
40extern "C" {
41#endif /* __cplusplus */
42#endif /* __cplusplus */
43
44#if defined(__ICCARM__) || defined(__CC_ARM)
45STATIC INLINE UINTPTR ArchSpGet(VOID)
46{
47    UINTPTR sp;
48    __asm("mov %0, sp" : "=r" (sp));
49    return sp;
50}
51
52STATIC INLINE UINTPTR ArchPspGet(VOID)
53{
54    UINTPTR psp;
55    __asm("mrs %0, psp" : "=r" (psp));
56    return psp;
57}
58
59STATIC 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__)
74STATIC INLINE UINTPTR ArchSpGet(VOID)
75{
76    UINTPTR sp;
77    __asm volatile("mov %0, sp" : "=r" (sp));
78    return sp;
79}
80
81STATIC INLINE UINTPTR ArchPspGet(VOID)
82{
83    UINTPTR psp;
84    __asm volatile("mrs %0, psp" : "=r" (psp));
85    return psp;
86}
87
88STATIC 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
106VOID ArchInit(VOID);
107
108#ifdef __cplusplus
109#if __cplusplus
110}
111#endif /* __cplusplus */
112#endif /* __cplusplus */
113
114#endif /* _LOS_ARCH_H */
115
116