#
# gp32/Makefile
#

TARGET = arm-unknown-linux-gnu

TOPDIR = $(shell pwd)
WORK = $(PWD)/work
CROSSTOOLS = $(TOPDIR)/../../toolchain/crosstools

KERNEL_VERSION = 2.6.16

.PHONY: all clean image modules map config

all: image modules map

clean: image-clean modules-clean map-clean

distclean: clean image-distclean modules-distclean map-distclean
	rm -vrf $(WORK)/linux-$(KERNEL_VERSION)

$(WORK)/linux-$(KERNEL_VERSION).tar.bz2: 
	wget -P $(WORK) ftp://ftp.kernel.org/pub/linux/kernel/v2.6/linux-$(KERNEL_VERSION).tar.bz2

$(WORK)/linux-$(KERNEL_VERSION): $(WORK)/linux-$(KERNEL_VERSION).tar.bz2
	tar -C $(WORK) -xvjf $(WORK)/linux-$(KERNEL_VERSION).tar.bz2
	cp -v $(TOPDIR)/config-$(KERNEL_VERSION) $(WORK)/linux-$(KERNEL_VERSION)/.config
	touch $(WORK)/linux-$(KERNEL_VERSION)

$(WORK)/zImage-$(KERNEL_VERSION): $(WORK)/linux-$(KERNEL_VERSION)
	cd $(WORK)/linux-$(KERNEL_VERSION) && \
		sed -i arch/arm/mm/alignment.c -e '/proc_alignment_write(/ s/const char/char/' && \
		export PATH=$(CROSSTOOLS)/bin:$$PATH && \
		export LD_LIBRARY_PATH=$(CROSSTOOLS)/lib:$$LD_LIBRARY_PATH && \
		make ARCH=arm CROSS_COMPILE=$(TARGET)- zImage V=1
	cp -v $(WORK)/linux-$(KERNEL_VERSION)/arch/arm/boot/zImage $(WORK)/zImage-$(KERNEL_VERSION)
	touch $(WORK)/zImage-$(KERNEL_VERSION)

image: $(WORK)/zImage-$(KERNEL_VERSION)

image-clean:
	rm -vf $(WORK)/zImage-$(KERNEL_VERSION)

image-distclean: image-clean

$(WORK)/modules-$(KERNEL_VERSION): $(WORK)/linux-$(KERNEL_VERSION)
	cd $(WORK)/linux-$(KERNEL_VERSION) && \
		export PATH=$(CROSSTOOLS)/bin:$$PATH && \
		export LD_LIBRARY_PATH=$(LD_LIBRARY_PATH)/lib:$$LD_LIBRARY_PATH && \
		make ARCH=arm CROSS_COMPILE=$(TARGET)- modules && \
		make ARCH=arm CROSS_COMPILE=$(TARGET)- INSTALL_MOD_PATH=$(WORK)/modules-$(KERNEL_VERSION) modules_install
	rm -f $(WORK)/modules-$(KERNEL_VERSION)/lib/modules/$(KERNEL_VERSION)/{source,build}
	touch $(WORK)/modules-$(KERNEL_VERSION)

modules: $(WORK)/modules-$(KERNEL_VERSION)

modules-clean:
	rm -vrf $(WORK)/modules-$(KERNEL_VERSION)

modules-distclean: modules-clean

$(WORK)/System.map-$(KERNEL_VERSION): $(WORK)/linux-$(KERNEL_VERSION)
	cp $(WORK)/linux-$(KERNEL_VERSION)/System.map $(WORK)/System.map-$(KERNEL_VERSION)
	touch $(WORK)/System.map-$(KERNEL_VERSION)

map: $(WORK)/System.map-$(KERNEL_VERSION)

map-clean:
	rm -vrf $(WORK)/System.map-$(KERNEL_VERSION)

map-distclean: map-clean

config: $(WORK)/linux-$(KERNEL_VERSION)
	cd $(WORK)/linux-$(KERNEL_VERSION) && \
		export PATH=$(CROSSTOOLS)/bin:$$PATH && \
		export LD_LIBRARY_PATH=$(CROSSTOOLS)/lib:$$LD_LIBRARY_PATH && \
		make ARCH=arm CROSS_COMPILE=$(TARGET)- menuconfig
	touch $(WORK)/linux-$(KERNEL_VERSION)

# End of file