| # |
| # 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. |
| |
| include $(TOPDIR)/config.mk |
| |
| LIB = $(obj)libdts.o |
| |
| ifeq ($(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 |
| |
| $(if $(CONFIG_ARCH_DEVICE_TREE),,\ |
| $(error Your architecture does not have device tree support enabled. \ |
| Please define CONFIG_ARCH_DEVICE_TREE)) |
| |
| # We preprocess the device tree file provide a useful define |
| DTS_CPPFLAGS := -x assembler-with-cpp \ |
| -DARCH_CPU_DTS=\"$(SRCTREE)/arch/$(ARCH)/dts/$(CONFIG_ARCH_DEVICE_TREE).dtsi\" \ |
| -DBOARD_DTS=\"$(SRCTREE)/board/$(VENDOR)/$(BOARD)/dts/$(DEVICE_TREE).dts\" \ |
| -I$(SRCTREE)/board/$(VENDOR)/dts -I$(SRCTREE)/arch/$(ARCH)/dts |
| |
| all: $(obj).depend $(LIB) |
| |
| # 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) -P $(DTS_CPPFLAGS) $< -o $(DT_BIN).dts.tmp |
| $(DTC) -R 4 -p 0x1000 -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 $(DT_BIN) |
| |
| OBJS-$(CONFIG_OF_EMBED) := dt.o |
| |
| COBJS := $(OBJS-y) |
| |
| OBJS := $(addprefix $(obj),$(COBJS)) |
| |
| binary: $(DT_BIN) |
| |
| $(LIB): $(OBJS) $(DTB) |
| $(call cmd_link_o_target, $(OBJS)) |
| |
| ######################################################################### |
| |
| # defines $(obj).depend target |
| include $(SRCTREE)/rules.mk |
| |
| sinclude $(obj).depend |
| |
| ######################################################################### |