kbuild: split device tree build rules into scripts/Makefile.dtbs
scripts/Makefile.lib is included not only from scripts/Makefile.build
but also from scripts/Makefile.{modfinal,package,vmlinux,vmlinux_o},
where DT build rules are not required.
Split the DT build rules out to scripts/Makefile.dtbs, and include it
only when necessary.
While I was here, I added $(DT_TMP_SCHEMA) as a prerequisite of
$(multi-dtb-y).
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
This commit is contained in:
Masahiro Yamada
@@ -45,11 +45,6 @@ else
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obj-y := $(filter-out %/, $(obj-y))
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endif
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ifdef need-dtbslist
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dtb-y += $(addsuffix /dtbs-list, $(subdir-ym))
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always-y += dtbs-list
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endif
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# Expand $(foo-objs) $(foo-y) etc. by replacing their individuals
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suffix-search = $(strip $(foreach s, $3, $($(1:%$(strip $2)=%$s))))
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# List composite targets that are constructed by combining other targets
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@@ -80,19 +75,6 @@ always-y += $(hostprogs-always-y) $(hostprogs-always-m)
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userprogs += $(userprogs-always-y) $(userprogs-always-m)
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always-y += $(userprogs-always-y) $(userprogs-always-m)
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# DTB
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# If CONFIG_OF_ALL_DTBS is enabled, all DT blobs are built
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dtb-$(CONFIG_OF_ALL_DTBS) += $(dtb-)
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# Composite DTB (i.e. DTB constructed by overlay)
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multi-dtb-y := $(call multi-search, $(dtb-y), .dtb, -dtbs)
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# Primitive DTB compiled from *.dts
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real-dtb-y := $(call real-search, $(dtb-y), .dtb, -dtbs)
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# Base DTB that overlay is applied onto
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base-dtb-y := $(filter %.dtb, $(call real-search, $(multi-dtb-y), .dtb, -dtbs))
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always-y += $(dtb-y)
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# Add subdir path
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ifneq ($(obj),.)
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@@ -104,9 +86,6 @@ lib-y := $(addprefix $(obj)/,$(lib-y))
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real-obj-y := $(addprefix $(obj)/,$(real-obj-y))
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real-obj-m := $(addprefix $(obj)/,$(real-obj-m))
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multi-obj-m := $(addprefix $(obj)/, $(multi-obj-m))
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dtb-y := $(addprefix $(obj)/, $(dtb-y))
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multi-dtb-y := $(addprefix $(obj)/, $(multi-dtb-y))
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real-dtb-y := $(addprefix $(obj)/, $(real-dtb-y))
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subdir-ym := $(addprefix $(obj)/,$(subdir-ym))
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endif
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@@ -255,12 +234,6 @@ cpp_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
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ld_flags = $(KBUILD_LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F))
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DTC_INCLUDE := $(srctree)/scripts/dtc/include-prefixes
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dtc_cpp_flags = -Wp,-MMD,$(depfile).pre.tmp -nostdinc \
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$(addprefix -I,$(DTC_INCLUDE)) \
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-undef -D__DTS__
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ifdef CONFIG_OBJTOOL
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objtool := $(objtree)/tools/objtool/objtool
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@@ -350,94 +323,6 @@ cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
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quiet_cmd_gzip = GZIP $@
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cmd_gzip = cat $(real-prereqs) | $(KGZIP) -n -f -9 > $@
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# DTC
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# ---------------------------------------------------------------------------
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DTC ?= $(objtree)/scripts/dtc/dtc
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DTC_FLAGS += \
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-Wno-unique_unit_address
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# Disable noisy checks by default
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ifeq ($(findstring 1,$(KBUILD_EXTRA_WARN)),)
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DTC_FLAGS += -Wno-unit_address_vs_reg \
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-Wno-avoid_unnecessary_addr_size \
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-Wno-alias_paths \
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-Wno-graph_child_address \
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-Wno-simple_bus_reg
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else
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DTC_FLAGS += \
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-Wunique_unit_address_if_enabled
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endif
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ifneq ($(findstring 2,$(KBUILD_EXTRA_WARN)),)
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DTC_FLAGS += -Wnode_name_chars_strict \
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-Wproperty_name_chars_strict \
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-Wunique_unit_address
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endif
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DTC_FLAGS += $(DTC_FLAGS_$(target-stem))
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# Set -@ if the target is a base DTB that overlay is applied onto
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DTC_FLAGS += $(if $(filter $(patsubst $(obj)/%,%,$@), $(base-dtb-y)), -@)
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# Generate an assembly file to wrap the output of the device tree compiler
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quiet_cmd_wrap_S_dtb = WRAP $@
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cmd_wrap_S_dtb = { \
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symbase=__$(patsubst .%,%,$(suffix $<))_$(subst -,_,$(notdir $*)); \
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echo '\#include <asm-generic/vmlinux.lds.h>'; \
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echo '.section .dtb.init.rodata,"a"'; \
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echo '.balign STRUCT_ALIGNMENT'; \
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echo ".global $${symbase}_begin"; \
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echo "$${symbase}_begin:"; \
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echo '.incbin "$<" '; \
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echo ".global $${symbase}_end"; \
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echo "$${symbase}_end:"; \
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echo '.balign STRUCT_ALIGNMENT'; \
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} > $@
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$(obj)/%.dtb.S: $(obj)/%.dtb FORCE
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$(call if_changed,wrap_S_dtb)
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$(obj)/%.dtbo.S: $(obj)/%.dtbo FORCE
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$(call if_changed,wrap_S_dtb)
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quiet_dtb_check_tag = $(if $(dtb-check-enabled),[C], )
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cmd_dtb_check = $(if $(dtb-check-enabled),; $(DT_CHECKER) $(DT_CHECKER_FLAGS) -u $(srctree)/$(DT_BINDING_DIR) -p $(DT_TMP_SCHEMA) $@ || true)
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quiet_cmd_dtc = DTC $(quiet_dtb_check_tag) $@
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cmd_dtc = $(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
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$(DTC) -o $@ -b 0 \
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$(addprefix -i,$(dir $<) $(DTC_INCLUDE)) $(DTC_FLAGS) \
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-d $(depfile).dtc.tmp $(dtc-tmp) ; \
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cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) \
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$(cmd_dtb_check)
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# NOTE:
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# Do not replace $(filter %.dtb %.dtbo, $^) with $(real-prereqs). When a single
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# DTB is turned into a multi-blob DTB, $^ will contain header file dependencies
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# recorded in the .*.cmd file.
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quiet_cmd_fdtoverlay = OVL $(quiet_dtb_check_tag) $@
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cmd_fdtoverlay = $(objtree)/scripts/dtc/fdtoverlay -o $@ -i $(filter %.dtb %.dtbo, $^) $(cmd_dtb_check)
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$(multi-dtb-y): FORCE
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$(call if_changed,fdtoverlay)
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$(call multi_depend, $(multi-dtb-y), .dtb, -dtbs)
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ifneq ($(CHECK_DTBS),)
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DT_CHECKER ?= dt-validate
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DT_CHECKER_FLAGS ?= $(if $(DT_SCHEMA_FILES),-l $(DT_SCHEMA_FILES),-m)
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DT_BINDING_DIR := Documentation/devicetree/bindings
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DT_TMP_SCHEMA := $(objtree)/$(DT_BINDING_DIR)/processed-schema.json
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dtb-check-enabled = $(if $(filter %.dtb, $@),y)
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endif
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$(obj)/%.dtb: $(obj)/%.dts $(DTC) $(DT_TMP_SCHEMA) FORCE
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$(call if_changed_dep,dtc)
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$(obj)/%.dtbo: $(src)/%.dtso $(DTC) FORCE
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$(call if_changed_dep,dtc)
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dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
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# Bzip2
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# ---------------------------------------------------------------------------
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