1 /*
2 * Copyright (c) 2021 Nuclei Limited. All rights reserved.
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 *
6 * Licensed under the Apache License, Version 2.0 (the License); you may
7 * not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
9 *
10 * www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
14 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19 #include "los_arch_context.h"
20 #include "los_arch_interrupt.h"
21 #include "los_task.h"
22 #include "los_memory.h"
23 #include "los_timer.h"
24 #include "los_sched.h"
25 #include "los_interrupt.h"
26 #include "los_debug.h"
27 #include "nuclei_sdk_soc.h"
28
29 #define INITIAL_MSTATUS ( MSTATUS_MPP | MSTATUS_MPIE | MSTATUS_FS_INITIAL)
30 #define ALIGN_DOWN(size, align) ((size) & ~((align) - 1))
31
ArchInit(VOID)32 LITE_OS_SEC_TEXT_INIT VOID ArchInit(VOID)
33 {
34 HalHwiInit();
35 }
36
ArchSysExit(VOID)37 LITE_OS_SEC_TEXT_MINOR VOID ArchSysExit(VOID)
38 {
39 ArchIntLock();
40 while (1) {
41 }
42 }
43
ArchTskStackInit(UINT32 taskID,UINT32 stackSize,VOID * topStack)44 LITE_OS_SEC_TEXT_INIT VOID *ArchTskStackInit(UINT32 taskID, UINT32 stackSize, VOID *topStack)
45 {
46 UINT32 index;
47 UINT8 *stk = 0;
48 TaskContext *context = NULL;
49
50 stk = ((UINT8 *)topStack) + stackSize + sizeof(STACK_TYPE);
51 stk = (UINT8 *)ALIGN_DOWN((uintptr_t)stk, REGBYTES);
52 context = (TaskContext *)(stk - sizeof(TaskContext));
53
54 for (index = 1; index < sizeof(TaskContext)/ sizeof(STACK_TYPE); index ++) {
55 ((STACK_TYPE *)context)[index] = OS_TASK_STACK_INIT;
56 }
57 context->ra = (STACK_TYPE)ArchSysExit;
58 context->a0 = (STACK_TYPE)taskID;
59 context->epc = (STACK_TYPE)OsTaskEntry;
60
61 context->mstatus = INITIAL_MSTATUS;
62
63 return (VOID *)context;
64 }
65
66 extern LosTask g_losTask;
ArchStartSchedule(VOID)67 LITE_OS_SEC_TEXT_INIT UINT32 ArchStartSchedule(VOID)
68 {
69 (VOID)LOS_IntLock();
70 OsSchedStart();
71 HalStartToRun();
72 return LOS_OK; /* never return */
73 }
74
ArchTaskSchedule(VOID)75 VOID ArchTaskSchedule(VOID)
76 {
77 SysTimer_SetSWIRQ();
78 }
79
HalTaskSwitch(VOID)80 VOID HalTaskSwitch(VOID)
81 {
82 SysTimer_ClearSWIRQ();
83 OsSchedTaskSwitch();
84 /* Set newTask to runTask */
85 g_losTask.runTask = g_losTask.newTask;
86 }
87
88