load = 0x80000000

CXXFLAGS = -Wno-unused-parameter -fno-strict-aliasing -fno-builtin -nostdinc
CPPFLAGS = -O5 -Wa,-mips32
CROSS = mipsel-linux-gnu-
CC = $(CROSS)gcc
LD = $(CROSS)ld
OBJCOPY = $(CROSS)objcopy
OBJDUMP = $(CROSS)objdump

kernel_sources = interrupts.cc panic.cc data.cc test.cc alloc.cc
boot_sources = init.cc
BUILT_SOURCES = $(kernel_sources) $(boot_sources)

PYPP = /usr/bin/pypp
%.cc: %.ccp kernel.hh
	$(PYPP) --name $< < $< > $@
%.hh: %.hhp
	$(PYPP) --name $< < $< > $@

# Transform ':' into ';' so vim doesn't think there are errors.
uimage: all.raw Makefile
	mkimage -A MIPS -O Linux -C none -a $(load) -e 0x$(shell /bin/sh -c '$(OBJDUMP) -t all | grep __start$$ | cut -b-8') -n "Shevek's kernel" -d $< $@ | sed -e 's/:/;/g'

arch.hh: mips.hh
	ln -s $< $@

%.o:%.cc Makefile kernel.hh arch.hh
	$(CC) $(CPPFLAGS) $(CXXFLAGS) -c $< -o $@

%.o:%.S Makefile
	$(CC) $(CPPFLAGS) -DKERNEL_STACK_SIZE=0x2000 -c $< -o $@

# entry.o must be the first file.  boot.o must be the first of the init objects (which can be dumped after loading).
all: entry.o $(subst .cc,.o,$(kernel_sources)) boot.o $(subst .cc,.o,$(boot_sources))
	$(LD) --omagic -Ttext $(load) $^ -o $@

junk = mdebug.abi32 reginfo comment pdr
%.raw: %
	$(OBJCOPY) -S $(addprefix --remove-section=.,$(junk)) -Obinary $< $@

%.gz: %
	gzip < $< > $@

clean:
	rm -f all uimage *.o all.raw.gz arch.hh

.PHONY: clean