# SPDX-License-Identifier: GPL-2.0-only all-dtb := $(dtb-y) $(dtb-) # If CONFIG_OF_ALL_DTBS is enabled, all DT blobs are builtdtb-$(CONFIG_OF_ALL_DTBS) += $(dtb-) # Composite DTB (i.e. DTB constructed by overlay)multi-dtb-y := $(call multi-search, $(dtb-y), .dtb, -dtbs)# Primitive DTB compiled from *.dtsreal-dtb-y := $(call real-search, $(dtb-y), .dtb, -dtbs)# Base DTB that overlay is applied ontobase-dtb-y := $(filter %.dtb, $(call real-search, $(multi-dtb-y), .dtb, -dtbs)) # Ensure that any .dtbo is applied to at least one base .dtb. Otherwise, it# does not get validated.applied-dtbo := $(filter %.dtbo, \	$(call real-search, $(call multi-search, $(all-dtb), .dtb, -dtbs), .dtb, -dtbs))unapplied-dtbo := $(filter-out $(applied-dtbo),$(filter %.dtbo, $(dtb-y)))$(if $(unapplied-dtbo), $(warning .dtbo is not applied to any base: $(unapplied-dtbo))) dtb-y           := $(addprefix $(obj)/, $(dtb-y))multi-dtb-y     := $(addprefix $(obj)/, $(multi-dtb-y))real-dtb-y      := $(addprefix $(obj)/, $(real-dtb-y)) always-y        += $(dtb-y)targets         += $(real-dtb-y) # dtbs-list# --------------------------------------------------------------------------- ifdef need-dtbslistsubdir-dtbslist := $(addsuffix /dtbs-list, $(subdir-ym))dtb-y           += $(subdir-dtbslist)always-y        += $(obj)/dtbs-listendif $(subdir-dtbslist): $(obj)/%/dtbs-list: $(obj)/% ; $(obj)/dtbs-list: $(dtb-y) FORCE	$(call if_changed,gen_order) # Assembly file to wrap dtb(o)# --------------------------------------------------------------------------- builtin-dtb-section = $(if $(filter arch/$(SRCARCH)/boot/dts%, $(obj)),.dtb.init.rodata,.rodata) # Generate an assembly file to wrap the output of the device tree compilerquiet_cmd_wrap_S_dtb = WRAP    $@      cmd_wrap_S_dtb = {								\		symbase=__$(patsubst .%,%,$(suffix $<))_$(subst -,_,$(notdir $*));	\		echo '\#include <asm-generic/vmlinux.lds.h>';				\		echo '.section $(builtin-dtb-section),"a"';				\		echo '.balign STRUCT_ALIGNMENT';					\		echo ".global $${symbase}_begin";					\		echo "$${symbase}_begin:";						\		echo '.incbin "$<" ';							\		echo ".global $${symbase}_end";						\		echo "$${symbase}_end:";						\		echo '.balign STRUCT_ALIGNMENT';					\	} > $@ $(obj)/%.dtb.S: $(obj)/%.dtb FORCE	$(call if_changed,wrap_S_dtb) $(obj)/%.dtbo.S: $(obj)/%.dtbo FORCE	$(call if_changed,wrap_S_dtb) # Schema check# --------------------------------------------------------------------------- ifneq ($(CHECK_DTBS),)DT_CHECKER ?= dt-validateDT_CHECKER_FLAGS ?= $(if $(DT_SCHEMA_FILES),-l $(DT_SCHEMA_FILES),-m)DT_BINDING_DIR := Documentation/devicetree/bindingsDT_TMP_SCHEMA := $(objtree)/$(DT_BINDING_DIR)/processed-schema.jsondtb-check-enabled = $(if $(filter %.dtb, $@),y)endif quiet_dtb_check_tag = $(if $(dtb-check-enabled),[C],   )cmd_dtb_check = $(if $(dtb-check-enabled),; $(DT_CHECKER) $(DT_CHECKER_FLAGS) -u $(srctree)/$(DT_BINDING_DIR) -p $(DT_TMP_SCHEMA) $@ || true) # Overlay# --------------------------------------------------------------------------- # NOTE:# Do not replace $(filter %.dtb %.dtbo, $^) with $(real-prereqs). When a single# DTB is turned into a multi-blob DTB, $^ will contain header file dependencies# recorded in the .*.cmd file.quiet_cmd_fdtoverlay = OVL $(quiet_dtb_check_tag) $@      cmd_fdtoverlay = $(objtree)/scripts/dtc/fdtoverlay -o $@ -i $(filter %.dtb %.dtbo, $^) $(cmd_dtb_check) $(multi-dtb-y): $(DT_TMP_SCHEMA) FORCE	$(call if_changed,fdtoverlay)$(call multi_depend, $(multi-dtb-y), .dtb, -dtbs) # DTC# --------------------------------------------------------------------------- DTC ?= $(objtree)/scripts/dtc/dtcDTC_FLAGS += -Wno-unique_unit_address # Disable noisy checks by defaultifeq ($(findstring 1,$(KBUILD_EXTRA_WARN)),)DTC_FLAGS += -Wno-unit_address_vs_reg \             -Wno-avoid_unnecessary_addr_size \             -Wno-alias_paths \             -Wno-graph_child_address \             -Wno-interrupt_map \             -Wno-simple_bus_regelseDTC_FLAGS += -Wunique_unit_address_if_enabledendif ifneq ($(findstring 2,$(KBUILD_EXTRA_WARN)),)DTC_FLAGS += -Wnode_name_chars_strict \             -Wproperty_name_chars_strict \             -Wunique_unit_addressendif DTC_FLAGS += $(DTC_FLAGS_$(target-stem)) # Set -@ if the target is a base DTB that overlay is applied ontoDTC_FLAGS += $(if $(filter $(patsubst $(obj)/%,%,$@), $(base-dtb-y)), -@) DTC_INCLUDE := $(srctree)/scripts/dtc/include-prefixes dtc_cpp_flags = -Wp,-MMD,$(depfile).pre.tmp -nostdinc -I $(DTC_INCLUDE) -undef -D__DTS__ dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp) quiet_cmd_dtc = DTC $(quiet_dtb_check_tag) $@      cmd_dtc = \	$(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \	$(DTC) -o $@ -b 0 $(addprefix -i,$(dir $<) $(DTC_INCLUDE)) \	       $(DTC_FLAGS) -d $(depfile).dtc.tmp $(dtc-tmp) ; \	cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) \	$(cmd_dtb_check) $(obj)/%.dtb: $(obj)/%.dts $(DTC) $(DT_TMP_SCHEMA) FORCE	$(call if_changed_dep,dtc) $(obj)/%.dtbo: $(src)/%.dtso $(DTC) FORCE	$(call if_changed_dep,dtc) # targets# --------------------------------------------------------------------------- targets += $(always-y) # %.dtb.o <- %.dtb.S <- %.dtb <- %.dts# %.dtbo.o <- %.dtbo.S <- %.dtbo <- %.dtsotargets += $(call intermediate_targets, .dtb.o, .dtb.S .dtb) \           $(call intermediate_targets, .dtbo.o, .dtbo.S .dtbo)