Kernel init

Kernel init 的协作图:

宏定义
#define	SYS_INIT_LEVEL_EARLY   0 /* reserved before kernel init */
#define	SYS_INIT_SYNC_0   s0
#define	LOS_SYS_INIT(func, level, sync)   SYS_INITCALL(func, level, sync)
	Register a startup module to the startup process.

详细描述

宏定义说明

LOS_SYS_INIT

#define LOS_SYS_INIT	(		func,
			level,
			sync
	)		SYS_INITCALL(func, level, sync)

Register a startup module to the startup process.

Description:

This API is used to register a startup module to the startup process.

注意

• Register a new module in the boot process of the kernel as part of the kernel capability component.
• In the startup framework, within the same level, the startup sequence is sorted by the sync number
• Using -u option can avoid linker to optimize symbol, otherwise the symbol may register failed!
• The parameter func is not be NULL, otherwise the system maybe crash!

参数

func	[IN] Type UINT32 (*)(VOID) Register function.
level	[IN] Type UINT32 Init level in the kernel.
sync	[IN] Type UINT32 Init sync in the kernel.

返回值

None

Dependency:

• los_init.h: the header file that contains the API declaration.

参见

SYS_INIT_LEVEL_EARLY

#define SYS_INIT_LEVEL_EARLY   0 /* reserved before kernel init */

Kernel module init level, used to describe the startup stage. Smaller level number, excute earlier. SYS_INIT_LEVEL_EARLY and SYS_INIT_LEVEL_RESERVE reserve for user and other level used for LiteOS.

SYS_INIT_SYNC_0

#define SYS_INIT_SYNC_0   s0

Kernel Module Init sync, used to set up the priority in same level. Smaller sync number, excute earlier.