mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-23 11:29:43 +09:00
a1d2478e2d
Some architectures, for example Microblaze, doesn't need a
splitted device tree because every Microblaze hw design is
different. The individuell Microblaze device tree will be
auto generated by FPGA design tools and could be used directly
with dtc.
The auto generated dts for Microblaze can not processed by CPP.
Unfortunately that is the default procedure in U-Boot to merge
a splitted device tree (substitution of ARCH_CPU_DTS).
Microblaze will never use the ARCH_CPU_DTS substitution and we
introduce the new board specific substitution variable BOARD_DTS
that points into vendor/board/dts subdir with the file name
of CONFIG_DEFAULT_DEVICE_TREE. The common dts file in vendor/dts
subdir (defined by CONFIG_DEFAULT_DEVICE_TREE) contain a single
include line that can processed by CPP:
/include/ BOARD_DTS
Signed-off-by: Stephan Linz <linz@li-pro.net>
Tested-by: Michal Simek <monstr@monstr.eu>
Acked-by: Simon Glass <sjg@chromium.org>
109 lines
3.4 KiB
Makefile
109 lines
3.4 KiB
Makefile
#
|
|
# 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),,\
|
|
$(error Your architecture does not have device tree support enabled. \
|
|
Please define CONFIG_ARCH_DEVICE_TREE))
|
|
|
|
# We preprocess the device tree file provide a useful define
|
|
DTS_CPPFLAGS := -DARCH_CPU_DTS=\"$(SRCTREE)/arch/$(ARCH)/dts/$(CONFIG_ARCH_DEVICE_TREE).dtsi\" \
|
|
-DBOARD_DTS=\"$(SRCTREE)/board/$(VENDOR)/$(BOARD)/dts/$(DEVICE_TREE).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
|
|
rc=$$( \
|
|
cat $< | $(CPP) -P $(DTS_CPPFLAGS) - | \
|
|
{ { $(DTC) -R 4 -p 0x1000 -O dtb -o ${DT_BIN} - 2>&1 ; \
|
|
echo $$? >&3 ; } | \
|
|
grep -v '^DTC: dts->dtb on file' ; \
|
|
} 3>&1 ) ; \
|
|
exit $$rc
|
|
|
|
process_lds = \
|
|
$(1) | sed -r -n 's/^OUTPUT_$(2)[ ("]*([^")]*).*/\1/p'
|
|
|
|
# Run the compiler and get the link script from the linker
|
|
GET_LDS = $(CC) $(CFLAGS) $(LDFLAGS) -Wl,--verbose 2>&1
|
|
|
|
$(obj)dt.o: $(DT_BIN)
|
|
# We want the output format and arch.
|
|
# We also hope to win a prize for ugliest Makefile / shell interaction
|
|
# We look in the LDSCRIPT first.
|
|
# Then try the linker which should give us the answer.
|
|
# Then check it worked.
|
|
oformat=`$(call process_lds,cat $(LDSCRIPT),FORMAT)` ;\
|
|
oarch=`$(call process_lds,cat $(LDSCRIPT),ARCH)` ;\
|
|
\
|
|
[ -z $${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
|
|
|
|
#########################################################################
|