1. Base:
	Description:
		- base dal infrastucture
		- registeration
		- io
	Files:
		dal_class.c
	Prefix:
		dal_XXX
2. User space API:
	Description:
		character device api
	Files:
		dal_cdev.c dal_cdev.h
	Prefix:
		dal_dev_XXX
3. Kernel space API:
	Description:
		- kernel api
	FIles:
		dal_kdi.c
	Prefix:

4. BH Plugin:
	Prefix:
		bh_XXXX

TOOD:
