ENDIAN='big'

ifeq ($(ENDIAN), 'big')
  ENDIAN_FLAGS=-EB
  LIB_DIRS=-L $(MIPS_TOOLS_PREFIX)/mipsel-elf/lib/eb -L $(MIPS_TOOLS_PREFIX)/lib/gcc/mipsel-elf/$(MIPS_GCC_VER)/eb
else
  ENDIAN_FLAGS=-EL
  LIB_DIRS=-L $(MIPS_TOOLS_PREFIX)/mipsel-elf/lib -L $(MIPS_TOOLS_PREFIX)/lib/gcc/mipsel-elf/$(MIPS_GCC_VER)
endif

CFLAGS=$(ENDIAN_FLAGS) -Os -I. -I../ -I../libsys -msoft-float -march=r3000
LFLAGS=$(ENDIAN_FLAGS) -M

ifeq ($(TLB),yes)
  CFLAGS+=-DSYS_IO_BASE=0xAC000000 -DSDRAM_BASE=0x80000000 -DFLASH_BASE_IO=0xA4000000 -DFLASH_BASE_MEM=0x88000000
  LFLAGS+=-T bootloader_tlb.ld
else
  CFLAGS+=-DSYS_IO_BASE=0xA0000000 -DSDRAM_BASE=0x40000000 -DFLASH_BASE_IO=0xA4000000 -DFLASH_BASE_MEM=0x00000000
  LFLAGS+=-T bootloader.ld
endif

LIBS=-lc -lgcc

CC=mipsel-elf-gcc
LD=mipsel-elf-ld
OBJDUMP=mipsel-elf-objdump
OBJCOPY=mipsel-elf-objcopy

.PHONY: libsys

all: bootloader_flash

libsys: startup_boot.S init_boot.S kernel_boot.S libsys_boot.c
	$(CC) $(CFLAGS) -c startup_boot.S -o startup.o
	$(CC) $(CFLAGS) -c init_boot.S -o init.o
	$(CC) $(CFLAGS) -c kernel_boot.S -o kernel.o
	$(CC) $(CFLAGS) -c libsys_boot.c -o libsys.o

bootloader: libsys bootloader.c 
	$(CC) $(CFLAGS) -g -c bootloader.c
	$(LD) $(LFLAGS) $(LIB_DIRS) startup.o init.o kernel.o libsys.o bootloader.o -o $@.elf $(LIBS) >$@.map
	$(OBJDUMP) -d $@.elf > $@.dis
	$(OBJCOPY) $@.elf -O binary $@.ROM.bin
	$(OBJCOPY) -O srec $@.elf $@.srec
	romgen $@.ROM.bin 10 $(ENDIAN_FLAGS)

bootloader_flash: libsys bootloader_with_flash.c 
	$(CC) $(CFLAGS) -g -c bootloader_with_flash.c
	$(CC) $(CFLAGS) -g -c ../cfiflash.c
	$(LD) $(LFLAGS) $(LIB_DIRS) startup.o init.o kernel.o libsys.o cfiflash.o bootloader_with_flash.o -o $@.elf $(LIBS) >$@.map
	$(OBJDUMP) -d $@.elf > $@.dis
	$(OBJCOPY) $@.elf -O binary $@.ROM.bin
	$(OBJCOPY) -O srec $@.elf $@.srec
	romgen $@.ROM.bin 11 $(ENDIAN_FLAGS)

clean:
	rm -rf *.o *.bin *.map *.dis *.srec *.elf *.vhd* *.tcl bootloader > /dev/null