modules-$(CONFIG_COREBOOT) += coreboot

#coreboot_version := git
#coreboot_repo := https://github.com/osresearch/coreboot
coreboot_version := 4.7
coreboot_base_dir := coreboot-$(coreboot_version)
coreboot_dir := $(coreboot_base_dir)/$(BOARD)
coreboot_tar := coreboot-$(coreboot_version).tar.xz
coreboot_url := https://www.coreboot.org/releases/$(coreboot_tar)
coreboot_hash := d68a83f8f687e8ea212b8c5bb501e24444b57c3f73896042d09628188c851368

# Coreboot builds are specialized on a per-target basis.
# The builds are done in a per-target subdirectory
CONFIG_COREBOOT_CONFIG ?= config/coreboot-$(BOARD).config

# Ensure that touching the config file will force a rebuild
$(build)/$(coreboot_dir)/.configured: $(CONFIG_COREBOOT_CONFIG)

EXTRA_FLAGS := -fdebug-prefix-map=$(pwd)=heads -gno-record-gcc-switches

coreboot_configure := \
	$(MAKE) -C $(build)/$(coreboot_base_dir) \
		oldconfig \
		obj=$(build)/$(coreboot_dir) \
		DOTCONFIG=../../$(CONFIG_COREBOOT_CONFIG) \
		BUILD_TIMELESS=1 \
		CFLAGS_x86_32="$(EXTRA_FLAGS)" \
		CFLAGS_x86_64="$(EXTRA_FLAGS)" \

coreboot_target := \
	-C $(build)/$(coreboot_base_dir) \
	obj=$(build)/$(coreboot_dir) \
	DOTCONFIG=../../$(CONFIG_COREBOOT_CONFIG) \
	BUILD_TIMELESS=1 \
	CFLAGS_x86_32="$(EXTRA_FLAGS)" \
	CFLAGS_x86_64="$(EXTRA_FLAGS)" \
	$(MAKE_JOBS)

coreboot_output := coreboot.rom
coreboot_depend += linux initrd

# hack to force a build dependency on the cross compiler
$(build)/$(coreboot_dir)/.configured: $(build)/$(coreboot_base_dir)/util/crossgcc/xgcc/bin/i386-elf-gcc
$(build)/$(coreboot_base_dir)/util/crossgcc/xgcc/bin/i386-elf-gcc: $(build)/$(coreboot_base_dir)/.canary
	echo '******* Building crossgcc-i386 (this might take a while) ******'
	$(MAKE) -C "$(build)/$(coreboot_base_dir)" CPUS=`nproc` crossgcc-i386
	#echo '******* Building crossgcc-arm (this might take a while) ******'
	#$(MAKE) -C "$(build)/$(coreboot_base_dir)" crossgcc-arm

# Force a rebuild if the inputs have changed
$(build)/$(coreboot_dir)/.build: \
	$(build)/$(BOARD)/bzImage \
	$(build)/$(BOARD)/initrd.cpio.xz \

# This produces a ROM image that is written with the flashrom program
$(build)/$(BOARD)/coreboot.rom: $(build)/$(coreboot_dir)/.build
	"$(build)/$(coreboot_dir)/cbfstool" "$(dir $<)coreboot.rom" print
	$(call do-copy,$(dir $<)coreboot.rom,$@)
	@touch $@   # update the time stamp

#
# Helpful target for reconfiguring the coreboot target
#
coreboot.menuconfig:
	$(MAKE) \
		-C "$(build)/$(coreboot_base_dir)" \
		DOTCONFIG="../../$(CONFIG_COREBOOT_CONFIG)" \
		menuconfig


# if we are not building from a git checkout,
# we must also download the coreboot-blobs tree
ifneq "$(coreboot_version)" "git"

coreboot_depends += coreboot-blobs
modules-y += coreboot-blobs

coreboot-blobs_version := $(coreboot_version)
coreboot-blobs_tar := coreboot-blobs-$(coreboot-blobs_version).tar.xz
coreboot-blobs_dir := coreboot-$(coreboot-blobs_version)/3rdparty/blobs
coreboot-blobs_url := https://www.coreboot.org/releases/$(coreboot-blobs_tar)
coreboot-blobs_hash := 443379a2207e350747cbbfe7968ceafddc7dd8563b067476f755ff11791bb5f5

## there is nothing to build for the blobs, this should be
## made easier to make happen
coreboot-blobs_output := .built
coreboot-blobs_configure := echo -e 'all:\n\ttouch .built' > Makefile

endif