1 /*
2 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
3 * Copyright (c) 2020-2021 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 #include "los_context.h"
33 #include "securec.h"
34 #include "los_arch_context.h"
35 #include "los_arch_interrupt.h"
36 #include "los_task.h"
37 #include "los_sched.h"
38 #include "los_interrupt.h"
39 #include "los_debug.h"
40
41 STATIC UINT32 g_sysNeedSched = FALSE;
42
43 /* ****************************************************************************
44 Function : ArchInit
45 Description : arch init function
46 Input : None
47 Output : None
48 Return : None
49 **************************************************************************** */
ArchInit(VOID)50 LITE_OS_SEC_TEXT_INIT VOID ArchInit(VOID)
51 {
52 HalHwiInit();
53 }
54
55 /* ****************************************************************************
56 Function : ArchSysExit
57 Description : Task exit function
58 Input : None
59 Output : None
60 Return : None
61 **************************************************************************** */
ArchSysExit(VOID)62 LITE_OS_SEC_TEXT_MINOR VOID ArchSysExit(VOID)
63 {
64 LOS_IntLock();
65 while (1) {
66 }
67 }
68
69 /* ****************************************************************************
70 Function : ArchTskStackInit
71 Description : Task stack initialization function
72 Input : taskID --- TaskID
73 stackSize --- Total size of the stack
74 topStack --- Top of task's stack
75 Output : None
76 Return : Context pointer
77 **************************************************************************** */
ArchTskStackInit(UINT32 taskID,UINT32 stackSize,VOID * topStack)78 LITE_OS_SEC_TEXT_INIT VOID *ArchTskStackInit(UINT32 taskID, UINT32 stackSize, VOID *topStack)
79 {
80 TaskContext *context = (TaskContext *)((UINTPTR)topStack + stackSize - sizeof(TaskContext));
81
82 context->R0 = taskID;
83 context->R1 = 0x01010101L;
84 context->R2 = 0x02020202L;
85 context->R3 = 0x03030303L;
86 context->R4 = 0x04040404L;
87 context->R5 = 0x05050505L;
88 context->R6 = 0x06060606L;
89 context->R7 = 0x07070707L;
90 context->R8 = 0x08080808L;
91 context->R9 = 0x09090909L;
92 context->R10 = 0x10101010L;
93 context->R11 = 0x11111111L;
94 context->R12 = 0x12121212L;
95 context->R13 = 0x13131313L;
96 context->R15 = (UINT32)ArchSysExit;
97 context->EPSR = 0xe0000144L;
98 context->EPC = (UINT32)OsTaskEntry;
99 return (VOID *)context;
100 }
101
ArchStartSchedule(VOID)102 LITE_OS_SEC_TEXT_INIT UINT32 ArchStartSchedule(VOID)
103 {
104 (VOID)LOS_IntLock();
105 OsSchedStart();
106 HalStartToRun();
107 return LOS_OK; /* never return */
108 }
109
HalIrqEndCheckNeedSched(VOID)110 VOID HalIrqEndCheckNeedSched(VOID)
111 {
112 if (g_sysNeedSched && g_taskScheduled && LOS_CHECK_SCHEDULE) {
113 ArchTaskSchedule();
114 }
115 }
116
ArchTaskSchedule(VOID)117 VOID ArchTaskSchedule(VOID)
118 {
119 UINT32 intSave;
120
121 if (OS_INT_ACTIVE) {
122 g_sysNeedSched = TRUE;
123 return;
124 }
125
126 intSave = LOS_IntLock();
127 g_sysNeedSched = FALSE;
128 BOOL isSwitch = OsSchedTaskSwitch();
129 if (isSwitch) {
130 HalTaskContextSwitch();
131 }
132 LOS_IntRestore(intSave);
133 return;
134 }
135