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https://github.com/AsahiLinux/u-boot
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74de8c9a16
This patch provides a support to build the user specified dts. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com> Acked-by: Simon Glass <sjg@chromium.org>
113 lines
3.6 KiB
Makefile
113 lines
3.6 KiB
Makefile
#
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# Copyright (c) 2011 The Chromium OS Authors.
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#
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# See file CREDITS for list of people who contributed to this
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# project.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundatio; either version 2 of
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# the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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# MA 02111-1307 USA
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#
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# This Makefile builds the internal U-Boot fdt if CONFIG_OF_CONTROL is
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# enabled. See doc/README.fdt-control for more details.
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include $(TOPDIR)/config.mk
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LIB = $(obj)libdts.o
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ifeq ($(DEVICE_TREE),)
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$(if $(CONFIG_DEFAULT_DEVICE_TREE),,\
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$(error Please define CONFIG_DEFAULT_DEVICE_TREE in your board header file))
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DEVICE_TREE = $(subst ",,$(CONFIG_DEFAULT_DEVICE_TREE))
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endif
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$(if $(CONFIG_ARCH_DEVICE_TREE),,\
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$(error Your architecture does not have device tree support enabled. \
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Please define CONFIG_ARCH_DEVICE_TREE))
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# We preprocess the device tree file provide a useful define
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DTS_CPPFLAGS := -x assembler-with-cpp \
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-DARCH_CPU_DTS=\"$(SRCTREE)/arch/$(ARCH)/dts/$(CONFIG_ARCH_DEVICE_TREE).dtsi\" \
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-DBOARD_DTS=\"$(SRCTREE)/board/$(VENDOR)/$(BOARD)/dts/$(DEVICE_TREE).dts\" \
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-I$(SRCTREE)/board/$(VENDOR)/dts -I$(SRCTREE)/arch/$(ARCH)/dts
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all: $(obj).depend $(LIB)
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# Use a constant name for this so we can access it from C code.
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# objcopy doesn't seem to allow us to set the symbol name independently of
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# the filename.
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DT_BIN := $(obj)dt.dtb
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$(DT_BIN): $(TOPDIR)/board/$(VENDOR)/dts/$(DEVICE_TREE).dts
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rc=$$( \
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cat $< | $(CPP) -P $(DTS_CPPFLAGS) - | \
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{ { $(DTC) -R 4 -p 0x1000 -O dtb -o ${DT_BIN} - 2>&1 ; \
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echo $$? >&3 ; } | \
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grep -v '^DTC: dts->dtb on file' ; \
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} 3>&1 1>&2 ) ; \
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exit $$rc
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process_lds = \
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$(1) | sed -r -n 's/^OUTPUT_$(2)[ ("]*([^")]*).*/\1/p'
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# Run the compiler and get the link script from the linker
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GET_LDS = $(CC) $(CFLAGS) $(LDFLAGS) -Wl,--verbose 2>&1
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$(obj)dt.o: $(DT_BIN)
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# We want the output format and arch.
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# We also hope to win a prize for ugliest Makefile / shell interaction
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# We look in the LDSCRIPT first.
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# Then try the linker which should give us the answer.
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# Then check it worked.
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[ -n "$(LDSCRIPT)" ] && \
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oformat=`$(call process_lds,cat $(LDSCRIPT),FORMAT)` && \
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oarch=`$(call process_lds,cat $(LDSCRIPT),ARCH)` ;\
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\
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[ -z $${oformat} ] && \
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oformat=`$(call process_lds,$(GET_LDS),FORMAT)` ;\
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[ -z $${oarch} ] && \
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oarch=`$(call process_lds,$(GET_LDS),ARCH)` ;\
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\
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[ -z $${oformat} ] && \
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echo "Cannot read OUTPUT_FORMAT from lds file $(LDSCRIPT)" && \
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exit 1 || true ;\
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[ -z $${oarch} ] && \
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echo "Cannot read OUTPUT_ARCH from lds file $(LDSCRIPT)" && \
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exit 1 || true ;\
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\
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cd $(dir ${DT_BIN}) && \
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$(OBJCOPY) -I binary -O $${oformat} -B $${oarch} \
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$(notdir ${DT_BIN}) $@
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rm $(DT_BIN)
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OBJS-$(CONFIG_OF_EMBED) := dt.o
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COBJS := $(OBJS-y)
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OBJS := $(addprefix $(obj),$(COBJS))
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binary: $(DT_BIN)
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$(LIB): $(OBJS) $(DTB)
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$(call cmd_link_o_target, $(OBJS))
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#########################################################################
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# defines $(obj).depend target
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include $(SRCTREE)/rules.mk
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sinclude $(obj).depend
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#########################################################################
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