CROSS_COMPILE	?= arm-none-eabi-
PLATFORM	?= href500
PATCHDIR	:= /proj/fairbanks_lx/users/coresw/linux-next-patches
build_dir       := $(CURDIR)/build-u8500
output_dir	:= $(HOME)
rootfs		:= $(PATCHDIR)/rootfs-u8500.cpio
genflash	:= $(PATCHDIR)/generate-flash-script.sh
gentxt		:= $(PATCHDIR)/generate-command-txt.sh
install_dir     := $(build_dir)/install
config_file     := $(build_dir)/.config
strip		:= $(CROSS_COMPILE)strip
objcopy		:= $(CROSS_COMPILE)objcopy

ARCH ?= arm

make_options := -f Makefile \
                ARCH=$(ARCH) \
                CROSS_COMPILE=$(CROSS_COMPILE) \
                KBUILD_OUTPUT=$(build_dir)

.PHONY: help
help:
	@echo "****  Common Makefile  ****"
	@echo "make config [PLATFORM=foo] - configure for platform \"foo\""
	@echo "make build - build the kernel and produce a RAMdisk image"
	@echo
	@echo "example:"
	@echo "make -f u8500.mak PLATFORM=href500 config"
	@echo "make -f u8500.mak PLATFORM=href500 build"

.PHONY: have-rootfs
have-rootfs:
	@if [ ! -f $(rootfs) ] ; then \
	     echo "ERROR: no rootfs at $(rootfs)" ; \
	     echo "This is needed to boot the system." ; \
	     echo "ABORTING." ; \
	     exit 1 ; \
	else \
	     echo "Rootfs available at $(rootfs)" ; \
	fi

.PHONY: have-crosscompiler
have-crosscompiler:
	@echo -n "Check that $(CROSS_COMPILE)gcc is available..."
	@which $(CROSS_COMPILE)gcc > /dev/null ; \
	if [ ! $$? -eq 0 ] ; then \
	   echo "ERROR: cross-compiler $(CROSS_COMPILE)gcc not in PATH=$$PATH!" ; \
	   echo "ABORTING." ; \
	   exit 1 ; \
	else \
	   echo "OK" ;\
	fi

.PHONY: have-mkimage
have-mkimage:
	@echo -n "Check that mkimage is available..."
	@which mkimage > /dev/null ; \
	if [ ! $$? -eq 0 ] ; then \
	   echo "ERROR: mkimage not in PATH=$$PATH!" ; \
	   echo "This toom creates the uImage and comes from the uboot tools" ; \
	   echo "On Ubuntu/Debian sudo apt-get install uboot-mkimage" ; \
	   echo "ABORTING." ; \
	   exit 1 ; \
	else \
	   echo "OK" ;\
	fi


.PHONY: have-gencommands
have-gencommands: FORCE
	@if [ ! -f $(genflash) ] ; then \
	     echo "ERROR: missing $(genflash)" ; \
	     echo "This is needed to generate the \"flash.scr\" file" ; \
	     echo "ABORTING." ; \
	     exit 1 ; \
	else \
	     echo "flash.scr generator available at $(genflash)" ; \
	fi
	@if [ ! -f $(gentxt) ] ; then \
	     echo "ERROR: missing $(gentxt)" ; \
	     echo "This is needed to generate the \"command.txt\" file" ; \
	     echo "ABORTING." ; \
	     exit 1 ; \
	else \
	     echo "command.txt generator available at $(gentxt)" ; \
	fi

# For early printk
# --enable DEBUG_LL
# --enable EARLY_PRINTK
# --set-str CMDLINE "root=/dev/ram0 console=ttyAMA2,115200n8 earlyprintk"
# --set-str UX500_DEBUG_UART 2
# This currently does not work
# --enable TICK_ONESHOT
# --enable NO_HZ
# --enable HIGH_RES_TIMERS
# This needs the CPU hotplug and CPUfreq patches
# --enable HOTPLUG_CPU
# --enable CPU_FREQ

config: have-rootfs FORCE
	@mkdir -p $(build_dir)
	@cp $(rootfs) $(build_dir)
	$(MAKE) $(make_options) u8500_defconfig
	# Reconfigure a bit
	$(CURDIR)/scripts/config --file $(build_dir)/.config \
	--enable BLK_DEV_INITRD \
	--set-str INITRAMFS_SOURCE rootfs-u8500.cpio \
	--enable RD_GZIP \
	--enable INITRAMFS_COMPRESSION_GZIP \
	--enable DEBUG_FS \
	--enable DMADEVICES \
	--enable STE_DMA40 \
	--enable RTC_CLASS \
	--enable RTC_DRV_PL031 \
	--enable HW_RANDOM \
	--enable HW_RANDOM_NOMADIK \
	--enable I2C \
	--enable I2C_NOMADIK \
	--enable MFD_TC35892 \
	--enable GPIO_TC35892 \
	--enable MFD_STMPE \
	--enable INPUT_KEYBOARD \
	--enable KEYBOARD_NOMADIK \
	--enable KEYBOARD_STMPE \
	--enable INPUT_TOUCHSCREEN \
	--enable TOUCHSCREEN_BU21013 \
	--enable INPUT_MISC \
	--enable INPUT_AB8500_PONKEY \
	--enable GPIO_STMPE \
	--enable AB8500_CORE \
	--enable REGULATOR \
	--enable REGULATOR_AB8500 \
	--enable RTC_DRV_AB8500 \
	--enable MMC \
	--enable MMC_BLOCK \
	--enable MMC_BLOCK_BOUNCE \
	--enable MMC_ARMMMCI \
	--enable EXT3_FS \
	--enable FAT_FS \
	--enable VFAT_FS \
	--enable NLS \
	--enable NLS_CODEPAGE_437 \
	--enable NLS_ISO8859_1
	yes "" | make $(make_options) oldconfig

menuconfig: FORCE
	$(MAKE) $(make_options) menuconfig

build: have-rootfs have-gencommands have-crosscompiler have-mkimage FORCE
	$(MAKE) $(make_options) -j 4 uImage CONFIG_DEBUG_SECTION_MISMATCH=y
	# $(MAKE) $(make_options) -j 4 modules
	# Copy to output dir
	cp -f $(build_dir)/arch/arm/boot/uImage $(output_dir)/uImage
	# Generate flash.scr
	$(genflash) $(PLATFORM) $(output_dir)/uImage $(output_dir)/flash.scr
	# Generate legacy command.txt
	$(gentxt) $(PLATFORM) $(output_dir)/uImage $(output_dir)/command.txt

regressiontest: config
	$(MAKE) $(make_options) realview_defconfig
	$(MAKE) $(make_options) -j 4 vmlinux CONFIG_DEBUG_SECTION_MISMATCH=y
	$(MAKE) $(make_options) -j 4 modules
	$(MAKE) $(make_options) versatile_defconfig
	$(MAKE) $(make_options) -j 4 vmlinux CONFIG_DEBUG_SECTION_MISMATCH=y
	$(MAKE) $(make_options) -j 4 modules
	$(MAKE) $(make_options) integrator_defconfig
	$(MAKE) $(make_options) -j 4 vmlinux CONFIG_DEBUG_SECTION_MISMATCH=y
	$(MAKE) $(make_options) -j 4 modules

TAGS: FORCE
	$(MAKE) $(make_options) TAGS

clean:
	$(MAKE) -f Makefile clean
	rm -f $(module_files)
	rm -rf build

# Rules without commands or prerequisites that do not match a file name
# are considered to always change when make runs. This means that any rule
# that depends on FORCE will always be remade also.
FORCE: