diff options
Diffstat (limited to 'dts/Makefile')
-rw-r--r-- | dts/Makefile | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/dts/Makefile b/dts/Makefile new file mode 100644 index 0000000000..5792afd271 --- /dev/null +++ b/dts/Makefile @@ -0,0 +1,103 @@ +# +# Copyright (c) 2011 The Chromium OS Authors. +# +# See file CREDITS for list of people who contributed to this +# project. +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License as +# published by the Free Software Foundatio; either version 2 of +# the License, or (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 59 Temple Place, Suite 330, Boston, +# MA 02111-1307 USA +# + +# 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 = $(obj)libdts.o + +$(if $(CONFIG_DEFAULT_DEVICE_TREE),,\ +$(error Please define CONFIG_DEFAULT_DEVICE_TREE in your board header file)) +DEVICE_TREE = $(subst ",,$(CONFIG_DEFAULT_DEVICE_TREE)) + +$(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 := -DARCH_CPU_DTS=\"../arch/$(ARCH)/dts/$(CONFIG_ARCH_DEVICE_TREE).dtsi\" + +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 + cat $< | $(CPP) -P $(DTS_CPPFLAGS) - >$@.tmp + $(DTC) -R 4 -p 0x1000 -O dtb -o ${DT_BIN} $@.tmp + rm $@.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: $(DT_BIN) + # We want the output format and arch. + # We also hope to win a prize for ugliest Makefile / shell interaction + # We look in the LDSCRIPT first. + # Then try the linker which should give us the answer. + # Then check it worked. + oformat=`$(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 + +######################################################################### |