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- #
- # 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 = $(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}) $(notdir $@)
- rm $(DT_BIN)
- obj-$(CONFIG_OF_EMBED) := dt.o
- binary: $(DT_BIN)
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