1 /*
2 * Copyright (c) 2013-2020, Huawei Technologies Co., Ltd. All rights reserved.
3 * Copyright (c) 2020-2022 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_arch_context.h"
33 #include "los_arch_interrupt.h"
34 #include "los_arch_timer.h"
35 #include "los_task.h"
36 #include "los_sched.h"
37 #include "los_memory.h"
38 #include "soc_common.h"
39
40 STATIC UINT32 g_sysNeedSched = FALSE;
41
ArchInit(VOID)42 LITE_OS_SEC_TEXT_INIT VOID ArchInit(VOID)
43 {
44 HalHwiInit();
45 }
46
HalIrqEndCheckNeedSched(VOID)47 VOID HalIrqEndCheckNeedSched(VOID)
48 {
49 if (g_sysNeedSched) {
50 LOS_Schedule();
51 }
52 }
53
ArchTaskSchedule(VOID)54 VOID ArchTaskSchedule(VOID)
55 {
56 UINT32 intSave;
57
58 if (OS_INT_ACTIVE) {
59 g_sysNeedSched = TRUE;
60 return;
61 }
62
63 intSave = LOS_IntLock();
64 g_sysNeedSched = FALSE;
65 BOOL isSwitch = OsSchedTaskSwitch();
66 if (isSwitch) {
67 HalTaskContextSwitch(intSave);
68 return;
69 }
70
71 LOS_IntRestore(intSave);
72 return;
73 }
74
ArchSysExit(VOID)75 LITE_OS_SEC_TEXT_MINOR VOID ArchSysExit(VOID)
76 {
77 ArchIntLock();
78 while (1) {
79 }
80 }
81
ArchTskStackInit(UINT32 taskID,UINT32 stackSize,VOID * topStack)82 LITE_OS_SEC_TEXT_INIT VOID *ArchTskStackInit(UINT32 taskID, UINT32 stackSize, VOID *topStack)
83 {
84 TaskContext *context = (TaskContext *)((UINTPTR)topStack + stackSize - sizeof(TaskContext));
85
86 context->mstatus = RISCV_MSTATUS_MPP | RISCV_MSTATUS_MPIE;
87 context->mepc = (UINT32)(UINTPTR)OsTaskEntry;
88 context->tp = TP_INIT_VALUE;
89 context->sp = SP_INIT_VALUE;
90 context->s11 = S11_INIT_VALUE;
91 context->s10 = S10_INIT_VALUE;
92 context->s9 = S9_INIT_VALUE;
93 context->s8 = S8_INIT_VALUE;
94 context->s7 = S7_INIT_VALUE;
95 context->s6 = S6_INIT_VALUE;
96 context->s5 = S5_INIT_VALUE;
97 context->s4 = S4_INIT_VALUE;
98 context->s3 = S3_INIT_VALUE;
99 context->s2 = S2_INIT_VALUE;
100 context->s1 = S1_INIT_VALUE;
101 context->s0 = FP_INIT_VALUE;
102 context->t6 = T6_INIT_VALUE;
103 context->t5 = T5_INIT_VALUE;
104 context->t4 = T4_INIT_VALUE;
105 context->t3 = T3_INIT_VALUE;
106 context->a7 = A7_INIT_VALUE;
107 context->a6 = A6_INIT_VALUE;
108 context->a5 = A5_INIT_VALUE;
109 context->a4 = A4_INIT_VALUE;
110 context->a3 = A3_INIT_VALUE;
111 context->a2 = A2_INIT_VALUE;
112 context->a1 = A1_INIT_VALUE;
113 context->a0 = taskID;
114 context->t2 = T2_INIT_VALUE;
115 context->t1 = T1_INIT_VALUE;
116 context->t0 = T0_INIT_VALUE;
117 context->ra = (UINT32)(UINTPTR)ArchSysExit;
118 return (VOID *)context;
119 }
120
ArchStartSchedule(VOID)121 LITE_OS_SEC_TEXT_INIT UINT32 ArchStartSchedule(VOID)
122 {
123 (VOID)LOS_IntLock();
124 OsSchedStart();
125 HalStartToRun();
126 return LOS_OK; /* never return */
127 }
128
wfi(VOID)129 LITE_OS_SEC_TEXT VOID wfi(VOID)
130 {
131 __asm__ __volatile__("wfi");
132 }
133
mb(VOID)134 LITE_OS_SEC_TEXT VOID mb(VOID)
135 {
136 __asm__ __volatile__("fence":::"memory");
137 }
138
dsb(VOID)139 LITE_OS_SEC_TEXT VOID dsb(VOID)
140 {
141 __asm__ __volatile__("fence":::"memory");
142 }
143