# -DLOADER_START=0x4000000
# must also be defined/changed in *.S files, since they do not parse defines
# REMEMBER in bcm2835
# MEM_COHERENT_REGION s defined now as 0x3f00000 !!!!

BUILD_DIR := build.baremetal
LIB_DIR :=../pitrex/baremetal
INC_DIR_PITREX := ../pitrex
INC_DIR_LIBRARY := $(LIB_DIR)/lib2835
SIM_DIR := ../sim/
PITREX_DIR := ../pitrex/pitrex/
VECTREX_DIR := ../pitrex/vectrex/
LOADER_DIR := ../piTrexBoot/

CFLAGS := -fuse-ld=bfd -Ofast \
	  -I$(INC_DIR_PITREX) -I$(INC_DIR_LIBRARY) \
	  -L$(LIB_DIR) \
	  -mfloat-abi=hard -nostartfiles -mfpu=vfp -march=armv6zk -mtune=arm1176jzf-s \
	  -DRPI0 -DFREESTANDING -DPITREX_DEBUG -DMHZ1000 -DLOADER_START=0x4000000
CC	= arm-none-eabi-gcc
AS	= $(CC)
AR	= arm-none-eabi-ar

.PHONY: dirCheck pitrexLib loaderObjects

all:	dirCheck pitrexLib loaderObjects pitrex.img loader.pit

dirCheck:
	if [ ! -d $(BUILD_DIR) ]; then mkdir $(BUILD_DIR); fi

pitrexLib: dirCheck
	$(MAKE) -C $(PITREX_DIR) -f Makefile.baremetal all
	$(MAKE) -C $(VECTREX_DIR) -f Makefile.baremetal all

loaderObjects: dirCheck $(BUILD_DIR)/baremetalEntry.o \
	$(BUILD_DIR)/bareMetalMain.o \
	$(BUILD_DIR)/cstubs.o \
	$(BUILD_DIR)/rpi-armtimer.o \
	$(BUILD_DIR)/rpi-aux.o \
	$(BUILD_DIR)/rpi-gpio.o \
	$(BUILD_DIR)/rpi-interrupts.o \
	$(BUILD_DIR)/rpi-systimer.o \
	$(BUILD_DIR)/bootStrapMain.o \
	$(BUILD_DIR)/loaderEntry.o \
	$(BUILD_DIR)/loaderMain.o

$(BUILD_DIR)/baremetalEntry.o: $(LIB_DIR)/baremetalEntry.S
	$(AS) $(CFLAGS) -D__ASSEMBLY__ -c $(LIB_DIR)/baremetalEntry.S -o $(BUILD_DIR)/baremetalEntry.o

$(BUILD_DIR)/loaderEntry.o: loaderEntry.S
	$(AS) $(CFLAGS) -D__ASSEMBLY__ -c loaderEntry.S -o $(BUILD_DIR)/loaderEntry.o

$(BUILD_DIR)/bareMetalMain.o: $(LIB_DIR)/bareMetalMain.c $(LIB_DIR)/rpi-aux.h $(LIB_DIR)/rpi-gpio.h $(LIB_DIR)/rpi-armtimer.h $(LIB_DIR)/rpi-systimer.h $(LIB_DIR)/rpi-interrupts.h
	$(AS) $(CFLAGS) -D__ASSEMBLY__ -c $(LIB_DIR)/bareMetalMain.c -o $(BUILD_DIR)/bareMetalMain.o

$(BUILD_DIR)/loaderMain.o: loaderMain.c
	$(AS) $(CFLAGS) -D__ASSEMBLY__ -c loaderMain.c -o $(BUILD_DIR)/loaderMain.o

$(BUILD_DIR)/rpi-armtimer.o: $(LIB_DIR)/rpi-armtimer.c $(LIB_DIR)/rpi-armtimer.h $(LIB_DIR)/rpi-base.h
	$(CC) $(CFLAGS) -o $(BUILD_DIR)/rpi-armtimer.o -c $(LIB_DIR)/rpi-armtimer.c

$(BUILD_DIR)/rpi-aux.o: $(LIB_DIR)/rpi-aux.c $(LIB_DIR)/rpi-aux.h $(LIB_DIR)/rpi-base.h
	$(CC) $(CFLAGS) -o $(BUILD_DIR)/rpi-aux.o -c $(LIB_DIR)/rpi-aux.c

$(BUILD_DIR)/rpi-gpio.o: $(LIB_DIR)/rpi-gpio.c $(LIB_DIR)/rpi-gpio.h $(LIB_DIR)/rpi-base.h
	$(CC) $(CFLAGS) -o $(BUILD_DIR)/rpi-gpio.o -c $(LIB_DIR)/rpi-gpio.c

$(BUILD_DIR)/rpi-interrupts.o: $(LIB_DIR)/rpi-interrupts.c $(LIB_DIR)/rpi-interrupts.h $(LIB_DIR)/rpi-base.h
	$(CC) $(CFLAGS) -o $(BUILD_DIR)/rpi-interrupts.o -c $(LIB_DIR)/rpi-interrupts.c

$(BUILD_DIR)/rpi-systimer.o: $(LIB_DIR)/rpi-systimer.c $(LIB_DIR)/rpi-systimer.h $(LIB_DIR)/rpi-base.h
	$(CC) $(CFLAGS) -o $(BUILD_DIR)/rpi-systimer.o -c $(LIB_DIR)/rpi-systimer.c

$(BUILD_DIR)/cstubs.o: $(LIB_DIR)/cstubs.c
	$(CC) $(CFLAGS) -o $(BUILD_DIR)/cstubs.o -c $(LIB_DIR)/cstubs.c

$(BUILD_DIR)/bootStrapMain.o: bootStrapMain.c
	$(CC) $(CFLAGS) -o $(BUILD_DIR)/bootStrapMain.o -c bootStrapMain.c

pitrex.img: pitrexLib loaderObjects $(PITREX_DIR)$(BUILD_DIR)/bcm2835.o $(PITREX_DIR)$(BUILD_DIR)/pitrexio-gpio.o $(VECTREX_DIR)$(BUILD_DIR)/baremetalUtil.o $(VECTREX_DIR)$(BUILD_DIR)/vectrexInterface.o 
	$(CC) $(CFLAGS) -o $(BUILD_DIR)/pitrex.elf.img \
	$(BUILD_DIR)/baremetalEntry.o \
	$(BUILD_DIR)/bareMetalMain.o \
	$(BUILD_DIR)/cstubs.o \
	$(BUILD_DIR)/rpi-armtimer.o \
	$(BUILD_DIR)/rpi-aux.o \
	$(BUILD_DIR)/rpi-gpio.o \
	$(BUILD_DIR)/rpi-interrupts.o \
	$(BUILD_DIR)/rpi-systimer.o \
	$(PITREX_DIR)$(BUILD_DIR)/bcm2835.o \
	$(PITREX_DIR)$(BUILD_DIR)/pitrexio-gpio.o \
	$(VECTREX_DIR)$(BUILD_DIR)/baremetalUtil.o \
	$(VECTREX_DIR)$(BUILD_DIR)/osWrapper.o \
	$(VECTREX_DIR)$(BUILD_DIR)/vectrexInterface.o \
	$(BUILD_DIR)/bootStrapMain.o -lff12c  -ldebug  -lhal -lutils -lconsole -lff12c -lbob -li2c -lbcm2835 -larm
	$(RM) pitrex.img
	arm-none-eabi-objcopy $(BUILD_DIR)/pitrex.elf.img -O binary pitrex.img
ifdef MAKE_IMAGE
	# up to users to supply their own 'baremetal-install'
	baremetal-install pitrex.img
endif

loader.pit: pitrexLib loaderObjects 
	$(CC) $(CFLAGS) -o $(BUILD_DIR)/loader.elf.img \
	$(BUILD_DIR)/loaderEntry.o \
	$(BUILD_DIR)/cstubs.o \
	$(BUILD_DIR)/rpi-armtimer.o \
	$(BUILD_DIR)/rpi-aux.o \
	$(BUILD_DIR)/rpi-gpio.o \
	$(BUILD_DIR)/rpi-interrupts.o \
	$(BUILD_DIR)/rpi-systimer.o \
	$(PITREX_DIR)$(BUILD_DIR)/bcm2835.o \
	$(PITREX_DIR)$(BUILD_DIR)/pitrexio-gpio.o \
	$(VECTREX_DIR)$(BUILD_DIR)/baremetalUtil.o \
	$(VECTREX_DIR)$(BUILD_DIR)/osWrapper.o \
	$(VECTREX_DIR)$(BUILD_DIR)/vectrexInterface.o \
	$(BUILD_DIR)/loaderMain.o -lff12c  -ldebug  -lhal -lutils -lconsole -lff12c -lbob -li2c -lbcm2835 -larm
	$(RM) loader.pit
	arm-none-eabi-objcopy $(BUILD_DIR)/loader.elf.img -O binary loader.img
	##arm-none-eabi-objdump -l -S -D $(BUILD_DIR)/loader.elf.img > $(BUILD_DIR)/loader.elf.img.s
	dd if=loader.img of=loader.pit ibs=1 skip=67076096
	rm loader.img
ifdef MAKE_IMAGE
	# up to users to supply their own 'baremetal-install'
	baremetal-install loader.pit
endif

clean:
	$(RM) $(BUILD_DIR)/*.*
	$(RM) pitrex.img
	$(RM) loader.img
	$(RM) loader.pit