更新日期: 2022/06/01 来源: https://gitee.com/weharmony/kernel_liteos_a_note
main.c
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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_config.h"
33#include "los_sched_pri.h"
34
35/**
36 * @brief
37 * 内核入口函数,由汇编调用,见于reset_vector_up.S 和 reset_vector_mp.S
38 * up指单核CPU, mp指多核CPU bl main
39 * @return LITE_OS_SEC_TEXT_INIT
40 */
41LITE_OS_SEC_TEXT_INIT INT32 main(VOID)//由主CPU执行,默认0号CPU 为主CPU
42{
43 UINT32 ret = OsMain();
44 if (ret != LOS_OK) {
45 return (INT32)LOS_NOK;
46 }
47
48 CPU_MAP_SET(0, OsHwIDGet());//设置主CPU映射信息
49
50 OsSchedStart();//调度开始
51
52 while (1) {
53 __asm volatile("wfi");//WFI: wait for Interrupt 等待中断,即下一次中断发生前都在此hold住不干活
54 }
55}
int main(int argc, char **argv)
Definition: main.c:44
LITE_OS_SEC_TEXT_INIT UINT32 OsMain(VOID)
由汇编调用,鸿蒙C语言层级的入口点
Definition: los_config.c:186
STATIC INLINE UINT64 OsHwIDGet(VOID)
获取CPU硬件ID,每个CPU都有自己的唯一标识
Definition: los_hw_cpu.h:177
VOID OsSchedStart(VOID)
Definition: los_sched.c:294
signed int INT32
Definition: los_typedef.h:60
unsigned int UINT32
Definition: los_typedef.h:57