1 /*
2  * Copyright (C) 2022 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include "chre/core/init.h"
18 #include "chre/core/event_loop_manager.h"
19 #include "chre/core/static_nanoapps.h"
20 #include "chre/embos/init.h"
21 
22 #include "RTOS.h"
23 
24 namespace {
25 
26 constexpr char kChreTaskName[] = "CHRE";
27 constexpr size_t kChreTaskNameLen = sizeof(kChreTaskName) - 1;
28 
29 // The CHRE task priority was requested to be between the sub_task (prio=60),
30 // and the main task (prio=100).
31 constexpr OS_PRIO kChreTaskPriority = 80;
32 
33 // Stack for the CHRE task of size 8KB (2048 * sizeof(uint32_t)).
34 constexpr size_t kChreTaskStackDepth = 2048;
35 OS_STACKPTR uint32_t gChreTaskStack[kChreTaskStackDepth];
36 
37 OS_TASK gChreTcb;
38 
chreThreadEntry()39 void chreThreadEntry() {
40   chre::init();
41   chre::EventLoopManagerSingleton::get()->lateInit();
42   chre::loadStaticNanoapps();
43 
44   chre::EventLoopManagerSingleton::get()->getEventLoop().run();
45 
46   // we only get here if the CHRE EventLoop exited
47   chre::deinit();
48 }
49 
50 }  // anonymous namespace
51 
chreEmbosInit()52 void chreEmbosInit() {
53   OS_CREATETASK(&gChreTcb, kChreTaskName, chreThreadEntry, kChreTaskPriority,
54                 gChreTaskStack);
55 }
56 
chreEmbosDeinit()57 void chreEmbosDeinit() {
58   if (OS_IsTask(&gChreTcb)) {
59     chre::EventLoopManagerSingleton::get()->getEventLoop().stop();
60   }
61 }
62 
getChreTaskName()63 const char *getChreTaskName() {
64   return kChreTaskName;
65 }
66 
getChreTaskNameLen()67 size_t getChreTaskNameLen() {
68   return kChreTaskNameLen;
69 }
70