| 1 | # SPDX-License-Identifier: GPL-2.0-only |
| 2 | |
| 3 | # If CONFIG_OF_ALL_DTBS is enabled, all DT blobs are built |
| 4 | dtb-$(CONFIG_OF_ALL_DTBS) += $(dtb-) |
| 5 | |
| 6 | # Composite DTB (i.e. DTB constructed by overlay) |
| 7 | multi-dtb-y := $(call multi-search, $(dtb-y), .dtb, -dtbs) |
| 8 | # Primitive DTB compiled from *.dts |
| 9 | real-dtb-y := $(call real-search, $(dtb-y), .dtb, -dtbs) |
| 10 | # Base DTB that overlay is applied onto |
| 11 | base-dtb-y := $(filter %.dtb, $(call real-search, $(multi-dtb-y), .dtb, -dtbs)) |
| 12 | |
| 13 | dtb-y := $(addprefix $(obj)/, $(dtb-y)) |
| 14 | multi-dtb-y := $(addprefix $(obj)/, $(multi-dtb-y)) |
| 15 | real-dtb-y := $(addprefix $(obj)/, $(real-dtb-y)) |
| 16 | |
| 17 | always-y += $(dtb-y) |
| 18 | targets += $(real-dtb-y) |
| 19 | |
| 20 | # dtbs-list |
| 21 | # --------------------------------------------------------------------------- |
| 22 | |
| 23 | ifdef need-dtbslist |
| 24 | subdir-dtbslist := $(addsuffix /dtbs-list, $(subdir-ym)) |
| 25 | dtb-y += $(subdir-dtbslist) |
| 26 | always-y += $(obj)/dtbs-list |
| 27 | endif |
| 28 | |
| 29 | $(subdir-dtbslist): $(obj)/%/dtbs-list: $(obj)/% ; |
| 30 | |
| 31 | $(obj)/dtbs-list: $(dtb-y) FORCE |
| 32 | $(call if_changed,gen_order) |
| 33 | |
| 34 | # Assembly file to wrap dtb(o) |
| 35 | # --------------------------------------------------------------------------- |
| 36 | |
| 37 | builtin-dtb-section = $(if $(filter arch/$(SRCARCH)/boot/dts%, $(obj)),.dtb.init.rodata,.rodata) |
| 38 | |
| 39 | # Generate an assembly file to wrap the output of the device tree compiler |
| 40 | quiet_cmd_wrap_S_dtb = WRAP $@ |
| 41 | cmd_wrap_S_dtb = { \ |
| 42 | symbase=__$(patsubst .%,%,$(suffix $<))_$(subst -,_,$(notdir $*)); \ |
| 43 | echo '\#include <asm-generic/vmlinux.lds.h>'; \ |
| 44 | echo '.section $(builtin-dtb-section),"a"'; \ |
| 45 | echo '.balign STRUCT_ALIGNMENT'; \ |
| 46 | echo ".global $${symbase}_begin"; \ |
| 47 | echo "$${symbase}_begin:"; \ |
| 48 | echo '.incbin "$<" '; \ |
| 49 | echo ".global $${symbase}_end"; \ |
| 50 | echo "$${symbase}_end:"; \ |
| 51 | echo '.balign STRUCT_ALIGNMENT'; \ |
| 52 | } > $@ |
| 53 | |
| 54 | $(obj)/%.dtb.S: $(obj)/%.dtb FORCE |
| 55 | $(call if_changed,wrap_S_dtb) |
| 56 | |
| 57 | $(obj)/%.dtbo.S: $(obj)/%.dtbo FORCE |
| 58 | $(call if_changed,wrap_S_dtb) |
| 59 | |
| 60 | # Schema check |
| 61 | # --------------------------------------------------------------------------- |
| 62 | |
| 63 | ifneq ($(CHECK_DTBS),) |
| 64 | DT_CHECKER ?= dt-validate |
| 65 | DT_CHECKER_FLAGS ?= $(if $(DT_SCHEMA_FILES),-l $(DT_SCHEMA_FILES),-m) |
| 66 | DT_BINDING_DIR := Documentation/devicetree/bindings |
| 67 | DT_TMP_SCHEMA := $(objtree)/$(DT_BINDING_DIR)/processed-schema.json |
| 68 | dtb-check-enabled = $(if $(filter %.dtb, $@),y) |
| 69 | endif |
| 70 | |
| 71 | quiet_dtb_check_tag = $(if $(dtb-check-enabled),[C], ) |
| 72 | cmd_dtb_check = $(if $(dtb-check-enabled),; $(DT_CHECKER) $(DT_CHECKER_FLAGS) -u $(srctree)/$(DT_BINDING_DIR) -p $(DT_TMP_SCHEMA) $@ || true) |
| 73 | |
| 74 | # Overlay |
| 75 | # --------------------------------------------------------------------------- |
| 76 | |
| 77 | # NOTE: |
| 78 | # Do not replace $(filter %.dtb %.dtbo, $^) with $(real-prereqs). When a single |
| 79 | # DTB is turned into a multi-blob DTB, $^ will contain header file dependencies |
| 80 | # recorded in the .*.cmd file. |
| 81 | quiet_cmd_fdtoverlay = OVL $(quiet_dtb_check_tag) $@ |
| 82 | cmd_fdtoverlay = $(objtree)/scripts/dtc/fdtoverlay -o $@ -i $(filter %.dtb %.dtbo, $^) $(cmd_dtb_check) |
| 83 | |
| 84 | $(multi-dtb-y): $(DT_TMP_SCHEMA) FORCE |
| 85 | $(call if_changed,fdtoverlay) |
| 86 | $(call multi_depend, $(multi-dtb-y), .dtb, -dtbs) |
| 87 | |
| 88 | # DTC |
| 89 | # --------------------------------------------------------------------------- |
| 90 | |
| 91 | DTC ?= $(objtree)/scripts/dtc/dtc |
| 92 | DTC_FLAGS += -Wno-unique_unit_address |
| 93 | |
| 94 | # Disable noisy checks by default |
| 95 | ifeq ($(findstring 1,$(KBUILD_EXTRA_WARN)),) |
| 96 | DTC_FLAGS += -Wno-unit_address_vs_reg \ |
| 97 | -Wno-avoid_unnecessary_addr_size \ |
| 98 | -Wno-alias_paths \ |
| 99 | -Wno-graph_child_address \ |
| 100 | -Wno-simple_bus_reg |
| 101 | else |
| 102 | DTC_FLAGS += -Wunique_unit_address_if_enabled |
| 103 | endif |
| 104 | |
| 105 | ifneq ($(findstring 2,$(KBUILD_EXTRA_WARN)),) |
| 106 | DTC_FLAGS += -Wnode_name_chars_strict \ |
| 107 | -Wproperty_name_chars_strict \ |
| 108 | -Wunique_unit_address |
| 109 | endif |
| 110 | |
| 111 | DTC_FLAGS += $(DTC_FLAGS_$(target-stem)) |
| 112 | |
| 113 | # Set -@ if the target is a base DTB that overlay is applied onto |
| 114 | DTC_FLAGS += $(if $(filter $(patsubst $(obj)/%,%,$@), $(base-dtb-y)), -@) |
| 115 | |
| 116 | DTC_INCLUDE := $(srctree)/scripts/dtc/include-prefixes |
| 117 | |
| 118 | dtc_cpp_flags = -Wp,-MMD,$(depfile).pre.tmp -nostdinc -I $(DTC_INCLUDE) -undef -D__DTS__ |
| 119 | |
| 120 | dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp) |
| 121 | |
| 122 | quiet_cmd_dtc = DTC $(quiet_dtb_check_tag) $@ |
| 123 | cmd_dtc = \ |
| 124 | $(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \ |
| 125 | $(DTC) -o $@ -b 0 $(addprefix -i,$(dir $<) $(DTC_INCLUDE)) \ |
| 126 | $(DTC_FLAGS) -d $(depfile).dtc.tmp $(dtc-tmp) ; \ |
| 127 | cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) \ |
| 128 | $(cmd_dtb_check) |
| 129 | |
| 130 | $(obj)/%.dtb: $(obj)/%.dts $(DTC) $(DT_TMP_SCHEMA) FORCE |
| 131 | $(call if_changed_dep,dtc) |
| 132 | |
| 133 | $(obj)/%.dtbo: $(src)/%.dtso $(DTC) FORCE |
| 134 | $(call if_changed_dep,dtc) |
| 135 | |
| 136 | # targets |
| 137 | # --------------------------------------------------------------------------- |
| 138 | |
| 139 | targets += $(always-y) |
| 140 | |
| 141 | # %.dtb.o <- %.dtb.S <- %.dtb <- %.dts |
| 142 | # %.dtbo.o <- %.dtbo.S <- %.dtbo <- %.dtso |
| 143 | targets += $(call intermediate_targets, .dtb.o, .dtb.S .dtb) \ |
| 144 | $(call intermediate_targets, .dtbo.o, .dtbo.S .dtbo) |