# # Copyright (c) 2011 The Chromium OS Authors. # # SPDX-License-Identifier: GPL-2.0+ # # This Makefile builds the internal U-Boot fdt if CONFIG_OF_CONTROL is # enabled. See doc/README.fdt-control for more details. ifeq ($(DEVICE_TREE),) $(if $(CONFIG_DEFAULT_DEVICE_TREE),,\ $(error Please define CONFIG_DEFAULT_DEVICE_TREE in your board header file)) DEVICE_TREE = $(subst ",,$(CONFIG_DEFAULT_DEVICE_TREE)) endif DTS_INCDIRS = $(SRCTREE)/board/$(VENDOR)/$(BOARD)/dts DTS_INCDIRS += $(SRCTREE)/board/$(VENDOR)/dts DTS_INCDIRS += $(SRCTREE)/arch/$(ARCH)/dts DTS_CPPFLAGS := -x assembler-with-cpp -undef -D__DTS__ \ -nostdinc $(addprefix -I,$(DTS_INCDIRS)) DTC_FLAGS := -R 4 -p 0x1000 \ $(addprefix -i ,$(DTS_INCDIRS)) # Use a constant name for this so we can access it from C code. # objcopy doesn't seem to allow us to set the symbol name independently of # the filename. DT_BIN := $(obj)dt.dtb $(DT_BIN): $(TOPDIR)/board/$(VENDOR)/dts/$(DEVICE_TREE).dts $(CPP) $(DTS_CPPFLAGS) $< -o $(DT_BIN).dts.tmp $(DTC) $(DTC_FLAGS) -O dtb -o ${DT_BIN} $(DT_BIN).dts.tmp process_lds = \ $(1) | sed -r -n 's/^OUTPUT_$(2)[ ("]*([^")]*).*/\1/p' # Run the compiler and get the link script from the linker GET_LDS = $(CC) $(CFLAGS) $(LDFLAGS) -Wl,--verbose 2>&1 $(obj)dt.o: $(DT_BIN) # We want the output format and arch. # We also hope to win a prize for ugliest Makefile / shell interaction # We look in the LDSCRIPT first. # Then try the linker which should give us the answer. # Then check it worked. [ -n "$(LDSCRIPT)" ] && \ oformat=`$(call process_lds,cat $(LDSCRIPT),FORMAT)` && \ oarch=`$(call process_lds,cat $(LDSCRIPT),ARCH)` ;\ \ [ -z $${oformat} ] && \ oformat=`$(call process_lds,$(GET_LDS),FORMAT)` ;\ [ -z $${oarch} ] && \ oarch=`$(call process_lds,$(GET_LDS),ARCH)` ;\ \ [ -z $${oformat} ] && \ echo "Cannot read OUTPUT_FORMAT from lds file $(LDSCRIPT)" && \ exit 1 || true ;\ [ -z $${oarch} ] && \ echo "Cannot read OUTPUT_ARCH from lds file $(LDSCRIPT)" && \ exit 1 || true ;\ \ cd $(dir ${DT_BIN}) && \ $(OBJCOPY) -I binary -O $${oformat} -B $${oarch} \ $(notdir ${DT_BIN}) $@ rm $(DT_BIN) obj-$(CONFIG_OF_EMBED) := dt.o binary: $(DT_BIN)