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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154# 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,$(KBUILD_EXTRA_WARN)),)DTC_FLAGS += -Wno-unit_address_vs_reg \ -Wno-avoid_unnecessary_addr_size \ -Wno-alias_paths \ -Wno-interrupt_map \ -Wno-simple_bus_regelseDTC_FLAGS += -Wunique_unit_address_if_enabledendif
ifneq ($(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)