.PHONY: all
all: disk.img

bootx64.efi: efitest.bin hdr.asm
	nasm -o $@ -f bin hdr.asm

efitest.bin: efitest.asm
	nasm -o $@ -f bin $<

part.img: bootx64.efi
	dd if=/dev/zero of=$@ bs=1024 count=2080
	mkfs -t vfat $@
	mmd -i $@ ::/EFI
	mmd -i $@ ::/EFI/BOOT
	mcopy -i $@ $< ::/EFI/BOOT

disk.img: part.img
	dd if=/dev/zero of=$@ bs=1024 count=2048
	echo start=2048 type=ef | sfdisk $@
	dd if=$< of=$@ bs=512 seek=2048 conv=notrunc

.PHONY: clean
clean:
	rm -f bootx64.efi efitest.bin

.PHONY: run
run: disk.img
	qemu-system-x86_64 -bios /usr/share/ovmf/OVMF.fd -hda $< -net none -serial stdio

.PHONY: debug
debug: disk.img
	qemu-system-x86_64 -bios /usr/share/ovmf/OVMF.fd -S -s -hda $< -net none -serial stdio


disasm: bootx64.efi
	ndisasm -b 64 -o 0x1000 -e 4096 $< >$@

disasm16: bootx64.efi
	ndisasm -b 16 -o 0x1000 -e 4096 $< >$@