# directories
DESTDIR	?=
prefix	?= /usr/local
datadir	:= $(DESTDIR)$(prefix)/share/qemu-firmware


#############################################################################
# cross compiler auto detection

path := $(subst :, ,$(PATH))
system := $(shell uname -s | tr "A-Z" "a-z")

# first find cross binutils in path
find-cross-ld = $(firstword $(wildcard $(patsubst %,%/$(1)-*$(system)*-ld,$(path))))
# then check we have cross gcc too
find-cross-gcc = $(firstword $(wildcard $(patsubst %ld,%gcc,$(call find-cross-ld,$(1)))))
# finally strip off path + toolname so we get the prefix
find-cross-prefix = $(subst gcc,,$(notdir $(call find-cross-gcc,$(1))))

powerpc64_cross_prefix := $(call find-cross-prefix,powerpc64)
powerpc_cross_prefix := $(call find-cross-prefix,powerpc)
x86_64_cross_prefix := $(call find-cross-prefix,x86_64)
arm_cross_prefix := $(call find-cross-prefix,arm)
aarch64_cross_prefix := $(call find-cross-prefix,aarch64)


#############################################################################
# help text, common rules and targets

default help:
	@echo
	@echo "nothing is done by default"
	@echo
	@echo "build targets:"
	@echo "  edk2           -- build UEFI firmware"
	@echo "  seabios        -- build BIOS firmware"
	@echo "  vgabios        -- build VGABIOS firmware"
	@echo
	@echo "other targets:"
	@echo "  clean          -- cleanup"
	@echo "  install        -- install blobs to $(datadir)"
	@echo
	@echo "You can set DESTDIR and prefix on the command line to"
	@echo "to change the install target directory, for example:"
	@echo "$ make prefix=/usr install"
	@echo

install:
	mkdir -p $(datadir)
	cp -avr blobs/edk2-* $(datadir)
	cp -av blobs/*.bin $(datadir)

clean: edk2-clean seabios-clean

submodule-%:
	git submodule update --init repos/$*


#############################################################################
# edk2 build rules

edk2 uefi: edk2-i386 edk2-x86_64 edk2-arm edk2-aarch64

edk2-i386: submodule-edk2
	sh scripts/compile-edk2.sh i386 $(x86_64_cross_prefix)

edk2-x86_64: submodule-edk2
	sh scripts/compile-edk2.sh x86_64 $(x86_64_cross_prefix)

edk2-arm: submodule-edk2
	sh scripts/compile-edk2.sh arm $(arm_cross_prefix)

edk2-aarch64: submodule-edk2
	sh scripts/compile-edk2.sh aarch64 $(aarch64_cross_prefix)

edk2-tools: submodule-edk2
	make -C repos/edk2/BaseTools

edk2-clean:
	make -C repos/edk2/BaseTools clean
	rm -rf repos/edk2/Build
	rm -rf repos/edk2/Conf/BuildEnv.sh
	rm -rf repos/edk2/Conf/build_rule.txt
	rm -rf repos/edk2/Conf/target.txt
	rm -rf repos/edk2/Conf/tools_def.txt


#############################################################################
# seabios build rules

# tag our seabios builds
SEABIOS_EXTRAVERSION="-prebuilt.qemu.org"

vgabios_variants := stdvga cirrus vmware qxl isavga virtio
vgabios_targets  := $(subst -isavga,,$(patsubst %,vgabios-%.bin,$(vgabios_variants)))

seabios bios: build-seabios-config-seabios-128k build-seabios-config-seabios-256k
	cp repos/seabios/builds/seabios-128k/bios.bin blobs/bios.bin
	cp repos/seabios/builds/seabios-256k/bios.bin blobs/bios-256k.bin

vgabios: $(patsubst %,vgabios-%,$(vgabios_variants))

vgabios-isavga: build-seabios-config-vga-isavga
	cp repos/seabios/builds/vga-isavga/vgabios.bin blobs/vgabios.bin

vgabios-%: build-seabios-config-vga-%
	cp repos/seabios/builds/vga-$*/vgabios.bin blobs/vgabios-$*.bin

build-seabios-config-%: configs/% submodule-seabios
	mkdir -p repos/seabios/builds/$*
	cp $< repos/seabios/builds/$*/.config
	$(MAKE) -C repos/seabios \
		EXTRAVERSION=$(SEABIOS_EXTRAVERSION) \
		CROSS_COMPILE=$(x86_64_cross_prefix) \
		KCONFIG_CONFIG=$(CURDIR)/repos/seabios/builds/$*/.config \
		OUT=$(CURDIR)/repos/seabios/builds/$*/ oldnoconfig
	$(MAKE) -C repos/seabios \
		EXTRAVERSION=$(SEABIOS_EXTRAVERSION) \
		CROSS_COMPILE=$(x86_64_cross_prefix) \
		KCONFIG_CONFIG=$(CURDIR)/repos/seabios/builds/$*/.config \
		OUT=$(CURDIR)/repos/seabios/builds/$*/ all

seabios-clean:
	rm -rf repos/seabios/.config repos/seabios/out repos/seabios/builds