blob: 785104e6d6409aa1b956db10107e17ddc6257a6d [file] [log] [blame]
Simon Glassbbb0b122011-10-15 05:48:21 +00001#
2# Copyright (c) 2011 The Chromium OS Authors.
3#
4# See file CREDITS for list of people who contributed to this
5# project.
6#
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.
11#
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.
16#
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,
20# MA 02111-1307 USA
21#
22
23# This Makefile builds the internal U-Boot fdt if CONFIG_OF_CONTROL is
24# enabled. See doc/README.fdt-control for more details.
25
26include $(TOPDIR)/config.mk
27
28LIB = $(obj)libdts.o
29
30$(if $(CONFIG_DEFAULT_DEVICE_TREE),,\
31$(error Please define CONFIG_DEFAULT_DEVICE_TREE in your board header file))
32DEVICE_TREE = $(subst ",,$(CONFIG_DEFAULT_DEVICE_TREE))
33
34$(if $(CONFIG_ARCH_DEVICE_TREE),,\
35$(error Your architecture does not have device tree support enabled. \
36Please define CONFIG_ARCH_DEVICE_TREE))
37
38# We preprocess the device tree file provide a useful define
Horst Kronstorferb4f106b2012-07-13 03:03:40 +000039DTS_CPPFLAGS := -ansi \
40 -DARCH_CPU_DTS=\"$(SRCTREE)/arch/$(ARCH)/dts/$(CONFIG_ARCH_DEVICE_TREE).dtsi\" \
Stephan Linza1d24782012-07-04 22:25:29 +020041 -DBOARD_DTS=\"$(SRCTREE)/board/$(VENDOR)/$(BOARD)/dts/$(DEVICE_TREE).dts\"
Simon Glassbbb0b122011-10-15 05:48:21 +000042
43all: $(obj).depend $(LIB)
44
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
47# the filename.
48DT_BIN := $(obj)dt.dtb
49
50$(DT_BIN): $(TOPDIR)/board/$(VENDOR)/dts/$(DEVICE_TREE).dts
Wolfgang Denk896bbb52012-04-19 02:36:44 +000051 rc=$$( \
52 cat $< | $(CPP) -P $(DTS_CPPFLAGS) - | \
53 { { $(DTC) -R 4 -p 0x1000 -O dtb -o ${DT_BIN} - 2>&1 ; \
54 echo $$? >&3 ; } | \
55 grep -v '^DTC: dts->dtb on file' ; \
Stephen Warren58e22f82012-06-08 12:28:17 +000056 } 3>&1 1>&2 ) ; \
Wolfgang Denk896bbb52012-04-19 02:36:44 +000057 exit $$rc
Simon Glassbbb0b122011-10-15 05:48:21 +000058
59process_lds = \
60 $(1) | sed -r -n 's/^OUTPUT_$(2)[ ("]*([^")]*).*/\1/p'
61
62# Run the compiler and get the link script from the linker
63GET_LDS = $(CC) $(CFLAGS) $(LDFLAGS) -Wl,--verbose 2>&1
64
65$(obj)dt.o: $(DT_BIN)
66 # We want the output format and arch.
67 # We also hope to win a prize for ugliest Makefile / shell interaction
68 # We look in the LDSCRIPT first.
69 # Then try the linker which should give us the answer.
70 # Then check it worked.
Horst Kronstorfera4ff4712012-07-12 02:58:32 +000071 [ -n "$(LDSCRIPT)" ] && \
72 oformat=`$(call process_lds,cat $(LDSCRIPT),FORMAT)` && \
73 oarch=`$(call process_lds,cat $(LDSCRIPT),ARCH)` ;\
Simon Glassbbb0b122011-10-15 05:48:21 +000074 \
75 [ -z $${oformat} ] && \
76 oformat=`$(call process_lds,$(GET_LDS),FORMAT)` ;\
77 [ -z $${oarch} ] && \
78 oarch=`$(call process_lds,$(GET_LDS),ARCH)` ;\
79 \
80 [ -z $${oformat} ] && \
81 echo "Cannot read OUTPUT_FORMAT from lds file $(LDSCRIPT)" && \
82 exit 1 || true ;\
83 [ -z $${oarch} ] && \
84 echo "Cannot read OUTPUT_ARCH from lds file $(LDSCRIPT)" && \
85 exit 1 || true ;\
86 \
87 cd $(dir ${DT_BIN}) && \
88 $(OBJCOPY) -I binary -O $${oformat} -B $${oarch} \
89 $(notdir ${DT_BIN}) $@
90 rm $(DT_BIN)
91
92OBJS-$(CONFIG_OF_EMBED) := dt.o
93
94COBJS := $(OBJS-y)
95
96OBJS := $(addprefix $(obj),$(COBJS))
97
98binary: $(DT_BIN)
99
100$(LIB): $(OBJS) $(DTB)
101 $(call cmd_link_o_target, $(OBJS))
102
103#########################################################################
104
105# defines $(obj).depend target
106include $(SRCTREE)/rules.mk
107
108sinclude $(obj).depend
109
110#########################################################################