1 /*
2 * Copyright (c) 2009-2022 Huawei Technologies Co., Ltd. All rights reserved.
3 *
4 * UniProton is licensed under Mulan PSL v2.
5 * You can use this software according to the terms and conditions of the Mulan PSL v2.
6 * You may obtain a copy of Mulan PSL v2 at:
7 * http://license.coscl.org.cn/MulanPSL2
8 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
9 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
10 * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
11 * See the Mulan PSL v2 for more details.
12 * Create: 2009-12-22
13 * Description: Task模块
14 */
15 #include "prt_task_external.h"
16 #include "prt_asm_cpu_external.h"
17
18 OS_SEC_BSS struct TagOsTskSortedDelayList g_tskSortedDelay;
19 OS_SEC_BSS struct TagOsRunQue g_runQueue; // 核的局部运行队列
20
21 /*
22 * 描述：任务调度，切换到最高优先级任务
23 */
OsTskSchedule(void)24 OS_SEC_TEXT void OsTskSchedule(void)
25 {
26 /* 外层已经关中断 */
27 /* Find the highest task */
28 OsTskHighestSet();
29
30 /* In case that running is not highest then reschedule */
31 if ((g_highestTask != RUNNING_TASK) && (g_uniTaskLock == 0)) {
32 UNI_FLAG |= OS_FLG_TSK_REQ;
33
34 /* only if there is not HWI or TICK the trap */
35 if (OS_INT_INACTIVE) {
36 OsTaskTrap();
37 return;
38 }
39 }
40
41 return;
42 }
43
OsTskScheduleFast(void)44 OS_SEC_TEXT void OsTskScheduleFast(void)
45 {
46 /* Find the highest task */
47 OsTskHighestSet();
48
49 /* In case that running is not highest then reschedule */
50 if ((g_highestTask != RUNNING_TASK) && (g_uniTaskLock == 0)) {
51 UNI_FLAG |= OS_FLG_TSK_REQ;
52
53 /* only if there is not HWI or TICK the trap */
54 if (OS_INT_INACTIVE) {
55 OsTaskTrapFast();
56 }
57 }
58 }
59
60 /*
61 * 描述：如果快速切换后只有中断恢复，使用此接口
62 */
OsTskScheduleFastPs(uintptr_t intSave)63 OS_SEC_TEXT void OsTskScheduleFastPs(uintptr_t intSave)
64 {
65 /* Find the highest task */
66 OsTskHighestSet();
67
68 /* In case that running is not highest then reschedule */
69 if ((g_highestTask != RUNNING_TASK) && (g_uniTaskLock == 0)) {
70 UNI_FLAG |= OS_FLG_TSK_REQ;
71
72 /* only if there is not HWI or TICK the trap */
73 if (OS_INT_INACTIVE) {
74 OsTaskTrapFastPs(intSave);
75 }
76 }
77 }
78
OsTaskScan(void)79 OS_SEC_TEXT void OsTaskScan(void)
80 {
81 struct TagTskCb *taskCb = NULL;
82 bool needSchedule = FALSE;
83 struct TagListObject *tskSortedDelayList = &g_tskSortedDelay.tskList;
84
85 LIST_FOR_EACH(taskCb, tskSortedDelayList, struct TagTskCb, timerList) {
86 if (taskCb->expirationTick > g_uniTicks) {
87 break;
88 }
89
90 ListDelete(&taskCb->timerList);
91
92 if ((OS_TSK_PEND & taskCb->taskStatus) != 0) {
93 TSK_STATUS_CLEAR(taskCb, OS_TSK_PEND);
94 ListDelete(&taskCb->pendList);
95 taskCb->taskSem = NULL;
96 } else if ((OS_TSK_EVENT_PEND & taskCb->taskStatus) != 0) {
97 TSK_STATUS_CLEAR(taskCb, OS_TSK_EVENT_PEND);
98 } else if ((OS_TSK_QUEUE_PEND & taskCb->taskStatus) != 0) {
99 ListDelete(&taskCb->pendList);
100 TSK_STATUS_CLEAR(taskCb, OS_TSK_QUEUE_PEND);
101 } else {
102 TSK_STATUS_CLEAR(taskCb, OS_TSK_DELAY);
103 }
104
105 if ((OS_TSK_SUSPEND & taskCb->taskStatus) == 0) {
106 OsTskReadyAddBgd(taskCb);
107 needSchedule = TRUE;
108 }
109
110 taskCb = LIST_COMPONENT(tskSortedDelayList, struct TagTskCb, timerList);
111 }
112
113 if (needSchedule) {
114 OsTskScheduleFast();
115 }
116 }
117