heads/modules/coreboot

modules-$(CONFIG_COREBOOT) += coreboot

ifeq "$(CONFIG_COREBOOT)" "y"

CONFIG_COREBOOT_ROM			?= coreboot.rom
CONFIG_COREBOOT_BOOTBLOCK	?=

ifeq "$(CONFIG_TARGET_ARCH)" "x86"
	COREBOOT_TARGET := i386
	LINUX_IMAGE_FILE := bzImage
	COREBOOT_TARGET_CROSS :=
else ifeq "$(CONFIG_TARGET_ARCH)" "ppc64"
	COREBOOT_TARGET := ppc64
	LINUX_IMAGE_FILE := zImage
	# skiboot payload needs this to find the cross compiler, it can't find
	# it from XGCCPATH.  This uses the Heads toolchain for skiboot
	COREBOOT_TARGET_CROSS := CROSS=$(CROSS)
else
	$(error "$(CONFIG_TARGET_ARCH) target isn't supported by this module")
endif

ifeq "$(CONFIG_COREBOOT_VERSION)" "4.11"
	coreboot_version := 4.11
	coreboot_hash := 97fd859b4c39a25534fe33c30eb86e54a233952e08a024c55858d11598a8ad87
	coreboot-blobs_hash := aa7855c5bd385b3360dadc043ea6bc93f564e6e4840d9b3ee5b9e696bbd055db
else ifeq "$(CONFIG_COREBOOT_VERSION)" "4.19"
        coreboot_version := 4.19
        coreboot_hash := 65ccb2f46535b996e0066a1b76f81c8cf1ff3e27df84b3f97d8ad7b3e7cf0a43
        coreboot-blobs_hash := 30214caed07b25f11e47bec022ff6234841376e36689eb674de2330a3e980cbc
else ifeq "$(CONFIG_COREBOOT_VERSION)" "talos_2"
	coreboot_version = talos_2
	coreboot_commit_hash = c8aed443c631042ad2b0326c35cd0b774752b924
	coreboot_repo := https://github.com/Dasharo/coreboot
else ifeq "$(CONFIG_COREBOOT_VERSION)" "purism"
	coreboot_version := purism
	coreboot_repo := https://source.puri.sm/coreboot/coreboot
	coreboot_commit_hash := a899f08d2789db1dd9b02cff34179c4d38e6d0e3
else
	$(error "$(BOARD): does not specify coreboot version under CONFIG_COREBOOT_VERSION")
endif 

coreboot_depends := $(if $(CONFIG_PURISM_BLOBS), purism-blobs)
coreboot_depends := $(if $(CONFIG_NITROKEY_BLOBS), nitrokey-blobs)

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 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 -Wno-error=packed-not-aligned -Wno-address-of-packed-member

coreboot_configure := \
	mkdir -p "$(build)/$(coreboot_dir)" \
	&& $(call install_config,$(pwd)/$(CONFIG_COREBOOT_CONFIG),$(build)/$(coreboot_dir)/.config) \
	&& echo 'CONFIG_LOCALVERSION="$(BRAND_NAME)-$(HEADS_GIT_VERSION)"' >> $(build)/$(coreboot_dir)/.config \
	&& echo 'CONFIG_MAINBOARD_SMBIOS_PRODUCT_NAME="$(BOARD)"' >> $(build)/$(coreboot_dir)/.config \
	&& $(MAKE) olddefconfig \
		-C "$(build)/$(coreboot_base_dir)" \
		obj="$(build)/$(coreboot_dir)" \
		DOTCONFIG="$(build)/$(coreboot_dir)/.config" \
		BUILD_TIMELESS=1 \
		CFLAGS_x86_32="$(EXTRA_FLAGS)" \
		CFLAGS_x86_64="$(EXTRA_FLAGS)" \

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

coreboot_output := $(CONFIG_COREBOOT_ROM)
coreboot_output += $(CONFIG_COREBOOT_BOOTBLOCK)
coreboot_depend += linux initrd $(musl_dep)

COREBOOT_TOOLCHAIN=$(build)/$(coreboot_base_dir)/.xcompile
$(COREBOOT_TOOLCHAIN): $(build)/$(coreboot_base_dir)/.canary
	$(MAKE) -C "$(build)/$(coreboot_base_dir)" CPUS=$(CPUS) "crossgcc-$(COREBOOT_TARGET)"

$(build)/$(coreboot_dir)/.configured: $(COREBOOT_TOOLCHAIN)

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

# This produces a ROM image that is written with the flashrom program
ifneq ($(CONFIG_COREBOOT),)

$(build)/$(BOARD)/$(CB_OUTPUT_FILE): $(build)/$(coreboot_dir)/.build
	# Use coreboot.rom, because custom output files might not be processed by cbfstool
	"$(build)/$(coreboot_dir)/cbfstool" "$(dir $<)coreboot.rom" print
	$(call do-copy,$(dir $<)$(CONFIG_COREBOOT_ROM),$@)
	@touch $@   # update the time stamp

ifneq ($(CONFIG_COREBOOT_BOOTBLOCK),)
$(build)/$(BOARD)/$(CB_BOOTBLOCK_FILE): $(build)/$(coreboot_dir)/.build
	$(call do-copy,$(dir $<)$(CONFIG_COREBOOT_BOOTBLOCK),$@)
	@touch $@   # update the time stamp
endif

endif

#
# Helpful target for reconfiguring the coreboot target
#
coreboot.save_in_defconfig_format_in_place:
	mkdir -p "$(build)/$(coreboot_dir)" && \
	cp "$(pwd)/$(CONFIG_COREBOOT_CONFIG)" "$(build)/$(coreboot_dir)/.config" && \
	$(MAKE) \
		-C "$(build)/$(coreboot_base_dir)" \
		DOTCONFIG="$(build)/$(coreboot_dir)/.config" \
		olddefconfig && \
	$(MAKE) \
		-C "$(build)/$(coreboot_base_dir)" \
 		DOTCONFIG="$(build)/$(coreboot_dir)/.config" \
		savedefconfig && \
	mv "$(build)/$(coreboot_base_dir)/defconfig" "$(pwd)/$(CONFIG_COREBOOT_CONFIG)"
	
coreboot.save_in_oldconfig_format_in_place:
	mkdir -p "$(build)/$(coreboot_dir)" && \
	cp "$(pwd)/$(CONFIG_COREBOOT_CONFIG)" "$(build)/$(coreboot_dir)/.config" && \
	$(MAKE) \
		-C "$(build)/$(coreboot_base_dir)" \
		DOTCONFIG="$(build)/$(coreboot_dir)/.config" \
		olddefconfig \
	&& mv "$(build)/$(coreboot_dir)/.config" "$(pwd)/$(CONFIG_COREBOOT_CONFIG)"

coreboot.modify_defconfig_in_place:
	mkdir -p "$(build)/$(coreboot_dir)" && \
	cp "$(pwd)/$(CONFIG_COREBOOT_CONFIG)" "$(build)/$(coreboot_dir)/.config" && \
	$(MAKE) \
		-C "$(build)/$(coreboot_base_dir)" \
		DOTCONFIG="$(build)/$(coreboot_dir)/.config" \
		menuconfig \
	&& $(MAKE) \
		-C "$(build)/$(coreboot_base_dir)" \
		DOTCONFIG="$(build)/$(coreboot_dir)/.config" \
		DEFCONFIG="$(pwd)/$(CONFIG_COREBOOT_CONFIG)" \
		savedefconfig

coreboot.modify_and_save_oldconfig_in_place:
	mkdir -p "$(build)/$(coreboot_dir)" && \
	$(MAKE) menuconfig \
		-C "$(build)/$(coreboot_base_dir)" \
		obj="$(build)/$(coreboot_dir)" \
		DOTCONFIG="$(pwd)/$(CONFIG_COREBOOT_CONFIG)"

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

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_url := https://www.coreboot.org/releases/$(coreboot-blobs_tar)

ifeq "$(CONFIG_COREBOOT_VERSION)" "4.8.1"
	coreboot-blobs_tar_opt := --strip 3
	coreboot-blobs_dir := coreboot-$(coreboot-blobs_version)/3rdparty/blobs
else
	coreboot-blobs_tar_opt := --strip 2
	coreboot-blobs_dir := coreboot-$(coreboot-blobs_version)/3rdparty
endif

## 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
endif