Makefile

.DELETE_ON_ERROR:

.PHONY: all bootloader kernel mkinitrd initrd userspace bootloader-clean kernel-clean \
	mkinitrd-clean initrd-clean userspace-clean clean run

BOOT_BUILDDIR := boot/build

BUILD_TYPE ?= debug
ifeq ($(BUILD_TYPE),debug)
CARGO_PROFILE_FLAG :=
TARGET_SUBDIR := debug
else ifeq ($(BUILD_TYPE),release)
CARGO_PROFILE_FLAG := --release
TARGET_SUBDIR := release
else ifeq ($(BUILD_TYPE),test)
CARGO_PROFILE_FLAG := --profile doors-test
TARGET_SUBDIR := doors-test
else
$(error BUILD_TYPE should be either debug, release, or test, found $(BUILD_TYPE))
endif

KERNEL_BIN := kernel/target/x86_64-unknown-none/$(TARGET_SUBDIR)/doors

all: boot.img

bootloader:
	$(MAKE) -C boot

kernel:
	cd kernel && cargo fmt && cargo build $(CARGO_PROFILE_FLAG) && cargo clippy && cargo doc

mkinitrd:
	cd mkinitrd && cargo build --release

initrd: mkinitrd userspace
	mkinitrd/target/release/mkinitrd initrd initrd.bin

userspace:
	$(MAKE) -C userspace

bootpart.img: bootloader kernel initrd
	cp $(KERNEL_BIN) kernel.bin
	$(BOOT_BUILDDIR)/genfat $@ kernel.bin initrd.bin

boot.img: bootpart.img
	cp $(BOOT_BUILDDIR)/loader.bin $@
	truncate -s 128M $@
	dd if=bootpart.img of=$@ seek=2048 conv=notrunc

bootloader-clean:
	$(MAKE) -C boot clean

kernel-clean:
	cd kernel && cargo clean

mkinitrd-clean:
	cd mkinitrd && cargo clean

initrd-clean:
	rm -f initrd.bin

userspace-clean:
	$(MAKE) -C userspace clean

clean: bootloader-clean kernel-clean mkinitrd-clean initrd-clean userspace-clean
	rm -f boot.img bootpart.img kernel.bin

QEMU_FIXED_FLAGS := -drive file=boot.img,format=raw,index=0,media=disk

ifeq ($(BUILD_TYPE),test)
run: boot.img
	qemu-system-x86_64 $(QEMU_FIXED_FLAGS) -device isa-debug-exit,iobase=0xf4,iosize=0x04 -debugcon stdio -display none; \
	STATUS=$$?;                                            \
	if [ $$STATUS -eq 5 ]; then                            \
		echo "Test success";                               \
	elif [ $$STATUS -eq 7 ]; then                          \
		echo "Test failure";                               \
		exit 1;                                            \
	else                                                   \
		echo "Unrecognized QEMU exit status; QEMU error?"; \
		exit 1;                                            \
	fi
else
run: boot.img
	qemu-system-x86_64 $(QEMU_FIXED_FLAGS) -monitor stdio -debugcon vc
endif