2 # Copyright (c) 2011 The Chromium OS Authors.
4 # See file CREDITS for list of people who contributed to this
7 # This program is free software; you can redistribute it and/or
8 # modify it under the terms of the GNU General Public License as
9 # published by the Free Software Foundatio; either version 2 of
10 # the License, or (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program; if not, write to the Free Software
19 # Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23 # This Makefile builds the internal U-Boot fdt if CONFIG_OF_CONTROL is
24 # enabled. See doc/README.fdt-control for more details.
26 include $(TOPDIR)/config.mk
30 $(if $(CONFIG_DEFAULT_DEVICE_TREE),,\
31 $(error Please define CONFIG_DEFAULT_DEVICE_TREE in your board header file))
32 DEVICE_TREE = $(subst ",,$(CONFIG_DEFAULT_DEVICE_TREE))
34 $(if $(CONFIG_ARCH_DEVICE_TREE),,\
35 $(error Your architecture does not have device tree support enabled. \
36 Please define CONFIG_ARCH_DEVICE_TREE))
38 # We preprocess the device tree file provide a useful define
39 DTS_CPPFLAGS := -x assembler-with-cpp \
40 -DARCH_CPU_DTS=\"$(SRCTREE)/arch/$(ARCH)/dts/$(CONFIG_ARCH_DEVICE_TREE).dtsi\" \
41 -DBOARD_DTS=\"$(SRCTREE)/board/$(VENDOR)/$(BOARD)/dts/$(DEVICE_TREE).dts\"
43 all: $(obj).depend $(LIB)
45 # Use a constant name for this so we can access it from C code.
46 # objcopy doesn't seem to allow us to set the symbol name independently of
48 DT_BIN := $(obj)dt.dtb
50 $(DT_BIN): $(TOPDIR)/board/$(VENDOR)/dts/$(DEVICE_TREE).dts
52 cat $< | $(CPP) -P $(DTS_CPPFLAGS) - | \
53 { { $(DTC) -R 4 -p 0x1000 -O dtb -o ${DT_BIN} - 2>&1 ; \
55 grep -v '^DTC: dts->dtb on file' ; \
60 $(1) | sed -r -n 's/^OUTPUT_$(2)[ ("]*([^")]*).*/\1/p'
62 # Run the compiler and get the link script from the linker
63 GET_LDS = $(CC) $(CFLAGS) $(LDFLAGS) -Wl,--verbose 2>&1
66 # We want the output format and arch.
67 # We also hope to win a prize for ugliest Makefile / shell interaction
68 # We look in the LDSCRIPT first.
69 # Then try the linker which should give us the answer.
70 # Then check it worked.
71 [ -n "$(LDSCRIPT)" ] && \
72 oformat=`$(call process_lds,cat $(LDSCRIPT),FORMAT)` && \
73 oarch=`$(call process_lds,cat $(LDSCRIPT),ARCH)` ;\
75 [ -z $${oformat} ] && \
76 oformat=`$(call process_lds,$(GET_LDS),FORMAT)` ;\
78 oarch=`$(call process_lds,$(GET_LDS),ARCH)` ;\
80 [ -z $${oformat} ] && \
81 echo "Cannot read OUTPUT_FORMAT from lds file $(LDSCRIPT)" && \
84 echo "Cannot read OUTPUT_ARCH from lds file $(LDSCRIPT)" && \
87 cd $(dir ${DT_BIN}) && \
88 $(OBJCOPY) -I binary -O $${oformat} -B $${oarch} \
89 $(notdir ${DT_BIN}) $@
92 OBJS-$(CONFIG_OF_EMBED) := dt.o
96 OBJS := $(addprefix $(obj),$(COBJS))
100 $(LIB): $(OBJS) $(DTB)
101 $(call cmd_link_o_target, $(OBJS))
103 #########################################################################
105 # defines $(obj).depend target
106 include $(SRCTREE)/rules.mk
108 sinclude $(obj).depend
110 #########################################################################