1. 根目录:
2. arch
3. openrisc
4. boot
5. dts
6. Makefile

ifneq '$(CONFIG_OPENRISC_BUILTIN_DTB)' '""'
BUILTIN_DTB := $(patsubst "%",%,$(CONFIG_OPENRISC_BUILTIN_DTB)).dtb.o
else
BUILTIN_DTB :=
endif
obj-y += $(BUILTIN_DTB)

clean-files := *.dtb.S

#DTC_FLAGS ?= -p 1024