Makefile.emulators

# Allow to run kernel on different emulators with different prebuilt rootfs

# Rootfs preparation

hda:
	@make hda -C rootfs

flp:
	@make flp -C rootfs

ramfs:
	@make ramfs -C rootfs

# VM (Qemu/Bochs) Setting for different rootfs

ROOT_RAM = 0000
ROOT_FDB = 021d
ROOT_HDA = 0301

SETROOTDEV_CMD = $(SETROOTDEV) images/Image
SETROOTDEV_CMD_RAM = $(SETROOTDEV_CMD) $(ROOT_RAM) rootfs/$(RAM_IMG)
SETROOTDEV_CMD_FDB = $(SETROOTDEV_CMD) $(ROOT_FDB)
SETROOTDEV_CMD_HDA = $(SETROOTDEV_CMD) $(ROOT_HDA)

QEMU_CMD = $(QEMU) -m 16M -boot a -fda images/Image
QEMU_CMD_FDB = $(QEMU_CMD) -fdb rootfs/$(FLP_IMG)
QEMU_CMD_HDA = $(QEMU_CMD) -hda rootfs/$(HDA_IMG)
nullstring :=
QEMU_DBG = $(nullstring) -s -S #-nographic #-serial '/dev/ttyS0'"

BOCHS_CFG = tools/bochs/bochsrc/
BOCHS_CMD = $(BOCHS) -f $(BOCHS_CFG)/bochsrc-fda.bxrc
BOCHS_CMD_FDB = $(BOCHS) -f $(BOCHS_CFG)/bochsrc-fdb.bxrc
BOCHS_CMD_HDA = $(BOCHS) -f $(BOCHS_CFG)/bochsrc-hd.bxrc
BOCHS_DBG = .dbg

VM = $(shell cat $(VM_CFG))

ifeq ($(VM), bochs)
        NEW_VM=qemu
else
        NEW_VM=bochs
endif

switch:
	@echo "Switch to use emulator: $(NEW_VM)"
	@echo $(NEW_VM) > $(VM_CFG)

VM=$(shell cat $(VM_CFG))

ifeq ($(VM), bochs)
        VM_CMD = $(BOCHS_CMD)
        VM_CMD_FDB = $(BOCHS_CMD_FDB)
        VM_CMD_HDA = $(BOCHS_CMD_HDA)
        VM_DBG = $(BOCHS_DBG)
else
        VM_CMD = $(QEMU_CMD)
        VM_CMD_FDB = $(QEMU_CMD_FDB)
        VM_CMD_HDA = $(QEMU_CMD_HDA)
        VM_DBG = $(QEMU_DBG)
endif

# Running on emulators with differrent rootfs

ramdisk-boot:
	@# Force init/main.o build with ramdisk support
	make -B init/main.o RAMDISK=2048

start: ramdisk-boot Image
	$(SETROOTDEV_CMD_RAM)
	$(VM_CMD)

start-fd: Image flp
	$(SETROOTDEV_CMD_FDB)
	$(VM_CMD_FDB)

start-hd: Image hda
	$(SETROOTDEV_CMD_HDA)
	$(VM_CMD_HDA)

# Debugging the above targets

debug: ramdisk-boot Image
	$(SETROOTDEV_CMD_RAM)
	$(VM_CMD)$(VM_DBG)

debug-fd: Image flp
	$(SETROOTDEV_CMD_FDB)
	$(VM_CMD_FDB)$(VM_DBG)

debug-hd: Image hda
	$(SETROOTDEV_CMD_HDA)
	$(VM_CMD_HDA)$(VM_DBG)