From e5b898f6cb7ddac9dbffd4a2948861b32ffc8ae0 Mon Sep 17 00:00:00 2001
From: Leah Rowe <leah@libreboot.org>
Date: Thu, 17 Aug 2023 23:27:30 +0100
Subject: [PATCH] consolidate u-boot/seabios/coreboot build scripts

See file:
resources/scripts/build/defconfig/for
It is based on:
resources/scripts/build/payload/u-boot

The u-boot payload script has been deleted, as has the
seabios payload script; the build/boot/roms logic has
been heavily simplified too, by removing the logic for
building of elf files based on defconfig.

SeaBIOS, U-Boot and coreboot all use defconfig-type
infrastructure for their build systems, and they are
fundamentally the *same* in how to compile each codebase,
at least in an lbmk context, regardless of actual (and
very huge) differences in these codebases.

Several hundred sources-lines of code have been eliminated
by this change, drastically simplifying everything; U-Boot
payload compiling also now errors out when a single build
fails, instead of continuing. Also: build/boot/roms no longer
re-compiles a coreboot target that was already compiled,
which is the same behaviour observed for payloads.

(this means you must now manually delete a target, when you
wish to re-build it; the build/boot/roms logic now more or
less just runs cbfstool; blobutil is handled from
build/defconfig/for)

ALSO: Since crossgcc is now handled by build/defconfig/for, not
build/boot/roms, standalone compiling of u-boot is now possible.
This has been tested. You compile it like so:
./build defconfig for u-boot
or specific trees, e.g.
./build defconfig for u-boot default

One other consequence of this patch is that re-building the same
ROM image is now much faster, because the same builds are re-used
unless deleted. This could be useful when testing grub.cfg changes,
for example, if that's all you change. With things like ccache used
(not yet used robustly in lbmk), this could speed things up more,
depending on the codebase.

This patch demonstrates the raw power of lbmk; it is a very
simple and highly efficient build system, and now much more so!

Signed-off-by: Leah Rowe <leah@libreboot.org>
---
 .gitignore                                    |   1 +
 Makefile                                      |   7 +-
 resources/coreboot/build.list                 |   1 +
 resources/git/revisions                       |   4 +-
 resources/scripts/build/boot/roms             |   4 -
 resources/scripts/build/boot/roms_helper      | 304 +++++-------------
 resources/scripts/build/clean/payloads        |  30 --
 resources/scripts/build/clean/seabios         |  15 +-
 resources/scripts/build/defconfig/for         | 240 ++++++++++++++
 resources/scripts/build/payload/grub          |  22 +-
 resources/scripts/build/payload/seabios       |  84 -----
 resources/scripts/build/payload/u-boot        | 179 -----------
 resources/scripts/modify/seabios/configs      |   2 +-
 resources/scripts/update/seabios/configs      |   2 +-
 resources/seabios/build.list                  |   2 +
 .../seabios/{ => default}/config/libgfxinit   |   0
 resources/seabios/{ => default}/config/normal |   0
 resources/seabios/{ => default}/config/vgarom |   0
 resources/seabios/default/target.cfg          |   3 +
 resources/u-boot/build.list                   |   5 +
 20 files changed, 355 insertions(+), 550 deletions(-)
 create mode 100644 resources/coreboot/build.list
 delete mode 100755 resources/scripts/build/clean/payloads
 create mode 100755 resources/scripts/build/defconfig/for
 delete mode 100755 resources/scripts/build/payload/seabios
 delete mode 100755 resources/scripts/build/payload/u-boot
 create mode 100644 resources/seabios/build.list
 rename resources/seabios/{ => default}/config/libgfxinit (100%)
 rename resources/seabios/{ => default}/config/normal (100%)
 rename resources/seabios/{ => default}/config/vgarom (100%)
 create mode 100644 resources/seabios/default/target.cfg
 create mode 100644 resources/u-boot/build.list

diff --git a/.gitignore b/.gitignore
index 57247d97..284cdb48 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,6 +13,7 @@
 /bios_extract/
 /ec/
 /tmp/
+/elf/
 /payload/
 /me_cleaner/
 *.s[a-w]?
diff --git a/Makefile b/Makefile
index 0570d017..a0c96656 100644
--- a/Makefile
+++ b/Makefile
@@ -25,7 +25,7 @@
 
 .POSIX:
 
-#.PHONY: all check modules ich9m-descriptors payloads roms release \
+#.PHONY: all check modules ich9m-descriptors roms release \
 #	clean crossgcc-clean install-dependencies-ubuntu \
 #	install-dependencies-debian install-dependencies-arch \
 #	install-dependencies-void install-dependencies-fedora38 \
@@ -39,9 +39,6 @@ modules:
 ich9m-descriptors:
 	./build descriptors ich9m
 
-payloads:
-	./build payload all
-
 roms:
 	./build boot roms all
 
@@ -53,13 +50,13 @@ clean:
 	./build clean cbutils
 	./build clean flashrom
 	./build clean ich9utils
-	./build clean payloads
 	./build clean seabios
 	./build clean grub
 	./build clean memtest86plus
 	./build clean rom_images
 	./build clean u-boot
 	./build clean bios_extract
+	rm -Rf elf/ bin/
 
 crossgcc-clean:
 	./build clean crossgcc
diff --git a/resources/coreboot/build.list b/resources/coreboot/build.list
new file mode 100644
index 00000000..f6535149
--- /dev/null
+++ b/resources/coreboot/build.list
@@ -0,0 +1 @@
+build/coreboot.rom
diff --git a/resources/git/revisions b/resources/git/revisions
index edd076b2..c108d72e 100644
--- a/resources/git/revisions
+++ b/resources/git/revisions
@@ -47,8 +47,8 @@
 }
 
 {seabios}{
-	rev: 1281e340ad1d90c0cc8e8d902bb34f1871eb48cf
-	loc: seabios
+	rev: HEAD
+	loc: seabios/seabios
 	url: https://review.coreboot.org/seabios
 	bkup_url: https://github.com/coreboot/seabios
 }
diff --git a/resources/scripts/build/boot/roms b/resources/scripts/build/boot/roms
index 623cf88a..70054fd4 100755
--- a/resources/scripts/build/boot/roms
+++ b/resources/scripts/build/boot/roms
@@ -129,10 +129,6 @@ listboards()
 buildrom() {
 	board="$1"
 
-	# Start by building blobs and placing them in the
-	# coreboot tree only for boards that need them
-	./update blobs download ${board} || exit 1
-
 	if [ -d "resources/coreboot/${board}/" ]; then
 		./build boot roms_helper ${board}${opts}
 	else
diff --git a/resources/scripts/build/boot/roms_helper b/resources/scripts/build/boot/roms_helper
index 287d6dac..0ae914e1 100755
--- a/resources/scripts/build/boot/roms_helper
+++ b/resources/scripts/build/boot/roms_helper
@@ -29,11 +29,19 @@
 [ "x${DEBUG+set}" = 'xset' ] && set -v
 set -u -e
 
+err()
+{
+	printf "ERROR: build/boot/roms: %s\n" "${1}" 1>&2
+	exit 1
+}
+
 projectname="$(cat projectname)"
 
 blobs_required=""
 microcode_required=""
 
+board=""
+ubdir=""
 kmapdir="resources/grub/keymap"
 displaymodes=""
 payloads=""
@@ -58,16 +66,11 @@ done
 printf "\n\nboard is %s , kb is %s , displaymode is %s , payloads is %s\n" \
 		${board} ${keyboard_layouts} ${displaymodes} ${payloads} 1>&2
 
-if [ ! -d "resources/coreboot/${board}" ]; then
-	printf "build/roms: Target not defined: %s\n" ${board}
-	exit 1
-fi
-
-if [ ! -f "resources/coreboot/${board}/target.cfg" ]; then
-	printf "build/roms: Missing target.cfg for target: %s\n" ${board}
-	exit 1
-fi
+[ ! -d "resources/coreboot/${board}" ] && \
+	err "Target not defined: ${board}"
 
+[ ! -f "resources/coreboot/${board}/target.cfg" ] && \
+	err "Missing target.cfg for target: ${board}"
 
 grub_scan_disk="undefined"
 tree="undefined"
@@ -80,72 +83,42 @@ payload_grub="n"
 payload_grub_withseabios="n" # seabios chainloaded from grub
 payload_seabios="n"
 payload_seabios_withgrub="n" # i386-coreboot grub from SeaBIOS boot menu
-seabios_opromloadonly="0"
 payload_memtest="n"
 payload_uboot="n"
 uboot_config="undefined"
-# ditto option whether to compile ada in crossgcc:
-crossgcc_ada="y" # yes by default
 # Override the above defaults using target.cfg
 . "resources/coreboot/${board}/target.cfg"
 
-if [ "${grub_scan_disk}" = "undefined" ]; then
-	printf "build/roms: Target '%s' does not define grub_scan_disk. " \
-		${board}
-	printf "Defaulting to 'both'.\n"
+[ "${grub_scan_disk}" = "undefined" ] && \
 	grub_scan_disk="both"
-fi
-
-if [ "${grub_scan_disk}" != "both" ] && \
-	[ "${grub_scan_disk}" != "ata" ] && \
-	[ "${grub_scan_disk}" != "ahci" ]; then
-	printf "build/roms: Target '%s' defines bad grub_scan_disk option. " \
-			${board}
-	printf "Defaulting to 'both'.\n"
+[ "${grub_scan_disk}" != "both" ] && [ "${grub_scan_disk}" != "ata" ] && \
+    [ "${grub_scan_disk}" != "ahci" ] && \
 	grub_scan_disk="both"
-	# erroring out would be silly. just use the default
-fi
 
-if [ "${tree}" = "undefined" ]; then
-	printf "build/roms: Target '%s' does not define a coreboot tree. " \
-			${board}
-	printf "Skipping build.\n"
-	exit 1
-fi
-if [ "${arch}" = "undefined" ]; then
-	printf "build/roms: Target '%s' does not define a CPU type. " \
-			${board}
-	printf "Skipping build.\n"
-	exit 1
-fi
+[ "${tree}" = "undefined" ] && \
+	err "Target '${board}' does not define a coreboot tree. Skipping build."
+[ "${arch}" = "undefined" ] && \
+	err "Target '${board}' does not define a CPU type. Skipping build."
 
-if [ "${seabios_opromloadonly}" != "0" ] && \
-		[ "${seabios_opromloadonly}" != "1" ]; then
-	seabios_opromloadonly="0"
-fi
-if [ "${payload_memtest}" != "n" ] && \
-		[ "${payload_memtest}" != "y" ]; then
+[ "${payload_memtest}" != "n" ] && \
+    [ "${payload_memtest}" != "y" ] && \
 	payload_memtest="n"
-fi
-if [ "${payload_grub_withseabios}" = "y" ]; then
+[ "${payload_grub_withseabios}" = "y" ] && \
 	payload_grub="y"
-fi
 if [ "${payload_grub_withseabios}" = "y" ]; then
 	payload_seabios="y"
 	payload_seabios_withgrub="y"
 fi
-if [ "${payload_seabios_withgrub}" = "y" ]; then
+[ "${payload_seabios_withgrub}" = "y" ] && \
 	payload_seabios="y"
-fi
+
 # NOTE: reverse logic must NOT be applied. If SeaBIOS-with-GRUB works, that
 # doesn't necessarily mean GRUb-with-SeaBIOS will. For example, the board
 # might have an external GPU, where it's recommended to boot SeaBIOS first
 if [ "${payload_grub}" != "y" ] && [ "${payload_seabios}" != "y" ] \
 			&& [ "${payload_uboot}" != "y" ]; then
 	for configfile in "resources/coreboot/${board}/config/"*; do
-		if [ ! -e "${configfile}" ]; then
-			continue
-		fi
+		[ ! -e "${configfile}" ] && continue
 		printf "ERROR build/roms: Target '%s' defines no payload. " \
 				${board}
 		printf "Exiting.\n"
@@ -153,32 +126,17 @@ if [ "${payload_grub}" != "y" ] && [ "${payload_seabios}" != "y" ] \
 	done
 fi
 
-if [ "${payload_uboot}" != "n" ] && \
-		[ "${payload_uboot}" != "y" ]; then
+[ "${payload_uboot}" != "n" ] && [ "${payload_uboot}" != "y" ] && \
 	payload_uboot="n"
-fi
-
-if [ "${payload_uboot}" = "y" ] && \
-		[ "${uboot_config}" = "undefined" ]; then
+[ "${payload_uboot}" = "y" ] && [ "${uboot_config}" = "undefined" ] && \
 	uboot_config="default"
-fi
 
-if [ "${microcode_required}" != "n" ] \
-		&& [ "${microcode_required}" != "y" ]; then
+[ "${microcode_required}" != "n" ] && [ "${microcode_required}" != "y" ] && \
 	microcode_required="y"
-fi
-if [ "${blobs_required}" != "n" ] \
-		&& [ "${blobs_required}" != "y" ]; then
+[ "${blobs_required}" != "n" ] && [ "${blobs_required}" != "y" ] && \
 	blobs_required="y"
-fi
-
-# ada support needed for libgfxinit submodule
-if [ "${crossgcc_ada}" != "y" ] && [ "${crossgcc_ada}" != "n" ]; then
-	crossgcc_ada="y"
-fi
 
 # Override all payload directives with cmdline args
-# (do not override crossgcc_ada)
 if [ ! -z ${payloads} ]; then	
 	echo "setting payloads $payloads"
 	payload_grub="n"
@@ -186,7 +144,6 @@ if [ ! -z ${payloads} ]; then
 	payload_seabios="n"
 	payload_seabios_withgrub="n" # i386-coreboot grub from SeaBIOS menu
 	payload_uboot="n"
-	seabios_opromloadonly="0"
 	payload_memtest="n"
 
 	for payload in ${payloads} ; do
@@ -196,95 +153,42 @@ fi
 
 romdir="bin/${board}"
 cbdir="coreboot/${board}"
-if [ "${board}" != "${tree}" ]; then
+[ "${board}" != "${tree}" ] && \
 	cbdir="coreboot/${tree}"
-fi
 cbfstool="cbutils/${tree}/cbfstool"
 corebootrom="${cbdir}/build/coreboot.rom"
-seavgabiosrom="payload/seabios/seavgabios.bin"
+seavgabiosrom="elf/seabios/default/libgfxinit/vgabios.bin"
 
 ./build module cbutils ${tree} || exit 1
 
-if [ ! -d "${cbdir}" ]; then
-	./fetch_trees coreboot ${tree}
-fi
-
-cat version > "${cbdir}/.coreboot-version"
-
-if [ "${crossgcc_ada}" = "n" ]; then
-	export BUILD_LANGUAGES=c
-fi
-if [ "${arch}" = "x86_32" ] || [ "${arch}" = "x86_64" ]; then
-	if [ ! -d "${cbdir}/util/crossgcc/xgcc/i386-elf/" ]; then
-		# Even for 64-bit machines, coreboot builds 32-bit ROM
-		# images, so we only need to worry about i386-elf
-		make -C "${cbdir}" crossgcc-i386 CPUS=$(nproc)
-	fi
-	case "$(uname -m)" in
-		x86*|i*86|amd64) : ;;
-		*) export CROSS_COMPILE=i386-elf- ;;
-	esac
-elif [ "${arch}" = "ARMv7" ]; then
-	if [ ! -d "${cbdir}/util/crossgcc/xgcc/arm-eabi/" ]; then
-		make -C "${cbdir}" crossgcc-arm CPUS=$(nproc)
-	fi
-	case "$(uname -m)" in
-		arm|arm32|armv6*|armv7*) : ;;
-		*) export CROSS_COMPILE=arm-eabi- ;;
-	esac
-elif [ "${arch}" = "AArch64" ]; then
-	if [ ! -d "${cbdir}/util/crossgcc/xgcc/aarch64-elf/" ]; then
-		make -C "${cbdir}" crossgcc-aarch64 CPUS=$(nproc)
-	fi
-	# aarch64 also needs armv7 toolchain for arm-trusted-firmware
-	if [ ! -d "${cbdir}/util/crossgcc/xgcc/arm-eabi/" ]; then
-		make -C "${cbdir}" crossgcc-arm CPUS=$(nproc)
-	fi
-	case "$(uname -m)" in
-		arm64|aarch64) : ;;
-		*) export CROSS_COMPILE=aarch64-elf- ;;
-	esac
-fi
-
-export PATH="$(pwd)/${cbdir}/util/crossgcc/xgcc/bin:$PATH"
-
 if [ ! -f "${seavgabiosrom}" ] \
-		|| [ ! -f payload/seabios/seabios_libgfxinit.elf ] \
-		|| [ ! -f payload/seabios/seabios_vgarom.elf ] \
-		|| [ ! -f payload/seabios/seabios_normal.elf ]; then
-	if [ "${payload_seabios}" = "y" ]; then
-		./build payload seabios
-	elif [ "${payload_grub}" = "y" ] \
-			&& [ "${payload_grub_withseabios}" = "y" ]; then
-		./build payload seabios
-	fi
+    || [ ! -f elf/seabios/default/libgfxinit/bios.bin.elf ] \
+    || [ ! -f elf/seabios/default/vgarom/bios.bin.elf ] \
+    || [ ! -f elf/seabios/default/normal/bios.bin.elf ]; then
+	[ "${payload_seabios}" = "y" ] && \
+		./build defconfig for seabios
 fi
 
-if [ "${payload_memtest}" = "y" ]; then
-	if [ ! -f "memtest86plus/memtest" ]; then
-		./build module memtest86plus
-	fi
-fi
+[ "${payload_memtest}" = "y" ] && [ ! -f "memtest86plus/memtest" ] && \
+	./build module memtest86plus
 
 [ -d "${romdir}/" ] || mkdir -p "${romdir}/"
 rm -f "${romdir}"/*
 
 if [ "${payload_grub}" = "y" ] \
 			|| [ "${payload_seabios_withgrub}" = "y" ]; then
-	if [ -f "payload/grub/grub_usqwerty.cfg" ]; then
+	if [ -f "elf/grub/grub_usqwerty.cfg" ]; then
 		sha1sumcmd="sha1sum resources/grub/config/grub.cfg"
 		grubrefchecksum="$(${sha1sumcmd} | awk '{print $1}')"
 
-		sha1sumcmd="sha1sum payload/grub/grub_usqwerty.cfg"
+		sha1sumcmd="sha1sum elf/grub/grub_usqwerty.cfg"
 		grubbuildchecksum="$(${sha1sumcmd} | awk '{print $1}')"
 
 		if [ "${grubrefchecksum}" != "${grubbuildchecksum}" ]; then
-			rm -Rf payload/grub/
 			printf "Changes detected to GRUB. Re-building now:\n"
 		fi
 	else
 		printf "Required GRUB payloads not yet built. Building now:\n"
-		rm -Rf payload/grub/ # just in case
 	fi
 	for keymapfile in ${kmapdir}/*; do
 
@@ -295,33 +199,25 @@ if [ "${payload_grub}" = "y" ] \
 		keymap="${keymapfile##*/}"
 		keymap="${keymap%.gkb}"
 
-		grubelf="payload/grub/grub_${keymap}.elf"
-		grubcfg="payload/grub/grub_${keymap}.cfg"
-		grubtestcfg="payload/grub/grub_${keymap}_test.cfg"
+		grubelf="elf/grub/grub_${keymap}.elf"
+		grubcfg="elf/grub/grub_${keymap}.cfg"
+		grubtestcfg="elf/grub/grub_${keymap}_test.cfg"
 
 		if [ ! -f "${grubelf}" ] || [ ! -f "${grubcfg}" ] || \
-			[ ! -f "${grubtestcfg}" ]; then
-					./build payload grub
+		    [ ! -f "${grubtestcfg}" ]; then
+			./build payload grub
 		fi
 	done
 fi
 
 if [ "${payload_uboot}" = "y" ]; then
-	if [ "${uboot_config}" = "default" ]; then
-		ubdir="payload/u-boot/${board}"
-	else
-		ubdir="payload/u-boot/${board}/${uboot_config}"
-	fi
-
-	if [ -f "${ubdir}/u-boot.elf" ]; then
-		ubootelf="${ubdir}/u-boot.elf"
-	elif [ -f "${ubdir}/u-boot" ]; then
-		ubootelf="${ubdir}/u-boot"
-	else
-		printf "Required U-Boot payload not yet built. Building now\n"
-		rm -Rf "payload/u-boot/${board}" # just in case
-		./build payload u-boot "${board}"
-	fi
+	./build defconfig for u-boot ${board}
+	ubdir="elf/u-boot/${board}/${uboot_config}"
+	ubootelf="${ubdir}/u-boot.elf"
+	[ ! -f "${ubootelf}" ] && [ -f "${ubdir}/u-boot.bin" ] && \
+		ubootelf="${ubdir}/u-boot.bin"
+	[ ! -f "${ubootelf}" ] && \
+		err "Could not find u-boot build for board, ${board}"
 fi
 
 # it is assumed that no other work will be done on the ROM
@@ -331,9 +227,8 @@ moverom() {
 	newrompath="$2"
 	cuttype="$3"
 
-	if [ "${blobs_required}" = "n" ]; then
+	[ "${blobs_required}" = "n" ] && \
 		newrompath="${newrompath%.rom}_noblobs.rom"
-	fi
 
 	printf "\nCreating new ROM image: %s\n" "${newrompath}"
 
@@ -404,47 +299,14 @@ moverom() {
 	fi
 }
 
-# expected: configs must not specify a payload
-mkCoreboot() {
-	cbdir="${1}" # eg. coreboot/default
-	cbcfgpath="${2}" # eg. resources/coreboot/e6400nvidia_4mb/config/normal
-	if [ ! -f "${cbcfgpath}" ]; then
-		printf "\nmkCoreboot: coreboot config '%s' does not exist. " \
-				${cbcfgpath}
-		printf "Skipping build.\n"
-		return 0
-	fi
-	cat version > "${cbdir}/.coreboot-version"
-	(
-		if [ -f "${cbfstool}" ]; then
-			mv "${cbfstool}" "${cbdir}/cbfstool"
-		fi
-
-		cd "${cbdir}"
-		make distclean
-		cd -
-
-		if [ -f "${cbdir}/cbfstool" ]; then
-			mv "${cbdir}/cbfstool" "${cbfstool}"
-		fi
-	)
-	cp "${cbcfgpath}" "${cbdir}"/.config
-	(
-		cd "${cbdir}"
-		make -j$(nproc)
-	)
-}
-
 # make a rom in /tmp/ and then print the path of that ROM
 mkSeabiosRom() {
 	target_cbrom="${1}" # rom to insert seabios in. will not be touched
 		# (a tmpfile will be made instead)
 	target_seabios_cbfs_path="${2}" # e.g. fallback/payload
-	target_opromloadonly="${3}" # TODO: purge (useless setting)
-	target_initmode="${4}" # e.g. libgfxinit
+	target_initmode="${3}" # e.g. libgfxinit
 
-	target_seabioself="payload/seabios/seabios_${target_initmode}.elf"
-	target_seavgabios_rom="payload/seabios/seavgabios.bin"
+	target_seabioself="elf/seabios/default/${target_initmode}/bios.bin.elf"
 
 	tmprom=$(mktemp -t coreboot_rom.XXXXXXXXXX)
 
@@ -468,11 +330,8 @@ mkSeabiosRom() {
 	"${cbfstool}" "${tmprom}" add-int -i 0 -n etc/optionroms-checksum \
 				|| exit 1
 
-	"${cbfstool}" "${tmprom}" add-int -i ${target_opromloadonly} \
-				-n etc/only-load-option-roms || exit 1
-
 	if [ "${target_initmode}" = "libgfxinit" ]; then
-		"${cbfstool}" "${tmprom}" add -f "${target_seavgabios_rom}" \
+		"${cbfstool}" "${tmprom}" add -f "${seavgabiosrom}" \
 				-n vgaroms/seavgabios.bin -t raw || exit 1
 	fi
 
@@ -487,17 +346,12 @@ mkUbootRom() {
 	target_uboot_config="${3}"
 	cbfstool_path="${4}"
 
-	if [ "${target_uboot_config}" = "default" ]; then
-		target_ubdir="payload/u-boot/${board}"
-	else
-		target_ubdir="payload/u-boot/${board}/${target_uboot_config}"
-	fi
-
-	if [ -f "${target_ubdir}/u-boot.elf" ]; then
-		target_ubootelf="${target_ubdir}/u-boot.elf"
-	elif [ -f "${target_ubdir}/u-boot" ]; then
-		target_ubootelf="${target_ubdir}/u-boot"
-	fi
+	target_ubdir="elf/u-boot/${board}/${target_uboot_config}"
+	target_ubootelf="${target_ubdir}/u-boot.elf"
+	[ ! -f "${target_ubootelf}" ] && \
+		target_ubootelf="${target_ubdir}/u-boot.bin"
+	[ ! -f "${target_ubootelf}" ] && \
+		err "Could not find u-boot build for board, ${board}"
 
 	tmprom=$(mktemp -t coreboot_rom.XXXXXXXXXX)
 
@@ -514,9 +368,9 @@ mkGrubRom() {
 	target_cbrom="${2}"
 	target_grubelf_cbfs_path="${3}" # e.g. fallback/payload
 
-	grubelf="payload/grub/grub_${target_keymap}.elf"
-	grubcfg="payload/grub/grub_${target_keymap}.cfg"
-	grubtestcfg="payload/grub/grub_${target_keymap}_test.cfg"
+	grubelf="elf/grub/grub_${target_keymap}.elf"
+	grubcfg="elf/grub/grub_${target_keymap}.cfg"
+	grubtestcfg="elf/grub/grub_${target_keymap}_test.cfg"
 
 	tmprom=$(mktemp -t coreboot_rom.XXXXXXXXXX) || exit 1
 	cp "${target_cbrom}" "${tmprom}" || exit 1
@@ -572,15 +426,14 @@ mkRomsWithGrub() {
 	firstpayloadname="${4}" # allow values: grub, seabios, seabios_withgrub
 
 	x=${tmprompath}
-	y=${seabios_opromloadonly}
-	z=${initmode}
+	y=${initmode}
 	if [ "${payload_grub_withseabios}" = "y" ] \
 				&& [ "${firstpayloadname}" = "grub" ]; then
-		mv "$(mkSeabiosRom "${x}" "seabios.elf" "${y}" "${z}")" \
+		mv "$(mkSeabiosRom "${x}" "seabios.elf" "${y}")" \
 				"${tmprompath}"
 	elif [ "${payload_seabios_withgrub}" ] \
 				&& [ "${firstpayloadname}" != "grub" ]; then
-		mv "$(mkSeabiosRom "${x}" "fallback/payload" "$y" "$z")" \
+		mv "$(mkSeabiosRom "${x}" "fallback/payload" "$y")" \
 				"${tmprompath}"
 	fi	
 
@@ -631,7 +484,8 @@ mkRomsWithGrub() {
 }
 
 # Main ROM building function. This calls all other functions
-mkRoms() {
+mkRoms()
+{
 	cbcfgpath="${1}"
 	displaymode="${2}"
 	initmode="${3}"
@@ -643,7 +497,13 @@ mkRoms() {
 		return 0
 	fi
 
-	mkCoreboot "${cbdir}" "${cbcfgpath}"
+	./build defconfig for coreboot ${board}
+	_corebootrom="elf/coreboot/${board}/${initmode}_${displaymode}"
+	[ "${initmode}" = "normal" ] && \
+		_corebootrom="${_corebootrom%_${displaymode}}"
+	_corebootrom="${_corebootrom}/coreboot.rom"
+	corebootrom="$(mktemp -t coreboot_rom.XXXXXXXXXX)"
+	cp "${_corebootrom}" "${corebootrom}"
 
 	if [ "${displaymode}" = "txtmode" ] \
 				&& [ "${payload_memtest}" = "y" ]; then
@@ -655,9 +515,8 @@ mkRoms() {
 	if [ "${payload_seabios}" = "y" ]; then
 		if [ "${payload_seabios_withgrub}" = "n" ]; then
 			x=${corebootrom}
-			y=${seabios_opromloadonly}
-			z=${initmode}
-			t=$(mkSeabiosRom "$x" "fallback/payload" "$y" "$z")
+			y=${initmode}
+			t=$(mkSeabiosRom "$x" "fallback/payload" "$y")
 			if [ "${initmode}" = "normal" ]; then
 				newrompath="${romdir}/seabios_${board}_"
 				newrompath="${newrompath}${initmode}.rom"
@@ -736,8 +595,3 @@ else
 		mkRoms "${cbcfgpath}" "${displaymode}" "${initmode}"
 	done
 fi
-
-(
-cd "${cbdir}"
-make distclean
-)
diff --git a/resources/scripts/build/clean/payloads b/resources/scripts/build/clean/payloads
deleted file mode 100755
index 4d77b9ea..00000000
--- a/resources/scripts/build/clean/payloads
+++ /dev/null
@@ -1,30 +0,0 @@
-#!/usr/bin/env sh
-
-#  helper script: nothing to see here, forks!
-#
-#	Copyright (C) 2020, 2021 Leah Rowe <info@minifree.org>
-#
-#    This program is free software: you can redistribute it and/or modify
-#    it under the terms of the GNU General Public License as published by
-#    the Free Software Foundation, either version 3 of the License, or
-#    (at your option) any later version.
-#
-#    This program is distributed in the hope that it will be useful,
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-#    GNU General Public License for more details.
-#
-#    You should have received a copy of the GNU General Public License
-#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-#
-
-[ "x${DEBUG+set}" = 'xset' ] && set -v
-set -u -e
-
-# clean bucts
-# --------------------------------------------------------
-
-printf "Cleaning up payloads\n"
-
-rm -Rf payload/
-
diff --git a/resources/scripts/build/clean/seabios b/resources/scripts/build/clean/seabios
index 0757db9d..b8b17068 100755
--- a/resources/scripts/build/clean/seabios
+++ b/resources/scripts/build/clean/seabios
@@ -24,14 +24,13 @@ set -u -e
 # clean bucts
 # --------------------------------------------------------
 
-printf "Cleaning the previous build of seabios\n"
-
-rm -f seabios_libgfxinit.elf seavgabios.bin seabios_vgarom.elf
+printf "Cleaning the previous builds of seabios\n"
 
+rm -Rf elf/seabios || exit 1
 [ ! -d "seabios/" ] && exit 0
 
-(
-cd "seabios/"
-make distclean
-)
-
+for x in seabios/*; do
+	[ "${x}" = "seabios/seabios" ] && continue
+	[ ! -d "${x}" ] && continue
+	make -C "${x}" distclean || exit 1
+done
diff --git a/resources/scripts/build/defconfig/for b/resources/scripts/build/defconfig/for
new file mode 100755
index 00000000..93eae3f1
--- /dev/null
+++ b/resources/scripts/build/defconfig/for
@@ -0,0 +1,240 @@
+#!/usr/bin/env sh
+
+#  helper script: build elf files on build systems that use defconfig/kconfig
+#
+#	Copyright (C) 2022 Alper Nebi Yasak <alpernebiyasak@gmail.com>
+#	Copyright (C) 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
+#	Copyright (C) 2023 Leah Rowe <leah@libreboot.org>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation, either version 3 of the License, or
+#    (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# you could probably build *linux* with this script!
+
+[ "x${DEBUG+set}" = 'xset' ] && set -v
+set -u -e
+
+projectname="$(cat projectname)"
+our_version="$(cat version)"
+
+export LOCALVERSION="-${projectname}-${our_version}"
+
+arch=""
+cfgsdir=""
+codedir=""
+config=""
+config_name=""
+crossgcc_ada=""
+elfdir=""
+listfile=""
+project=""
+target=""
+target_dir=""
+tree=""
+
+main()
+{
+	[ $# -lt 1 ] && err "Project name not specified"
+	project="${1}"
+	elfdir="elf/${project}"
+	shift 1
+
+	cfgsdir="resources/${project}"
+	[ -d "${cfgsdir}" ] || err "directory, ${cfgsdir}, does not exist"
+
+	listfile="${cfgsdir}/build.list"
+	[ -f "${listfile}" ] || err "list file, ${listfile}, does not exist"
+
+	printf "Building %s binaries (elf files)\n" ${project}
+
+	# Build for all targets if no argument is given
+	if [ "$#" -eq 0 ]; then
+		for target_dir in "${cfgsdir}"/*; do
+			[ ! -d "${target_dir}/config/" ] && \
+				continue
+			set -- "$@" "${target_dir#${cfgsdir}/}"
+		done
+	fi
+
+	[ ! -d "${elfdir}" ] && \
+		mkdir -p ${elfdir}/
+
+	for x in "$@"; do
+		target="${x}"
+		if [ "${project}" = "coreboot" ]; then
+			./update blobs download ${target} || err "blobutil"
+		fi
+		build_defconfig || exit 1
+	done
+
+	printf "Done! The files are stored under %s/\n\n" ${elfdir}
+}
+
+build_defconfig()
+{
+	handle_dependencies "${target}" || return 1
+
+	for y in "${target_dir}/config"/*; do
+		[ ! -f "${y}" ] && continue
+		config="${y}"
+		config_name="${config#$target_dir/config/}"
+
+		printf "build/defconfig/%s %s: build config %s\n" \
+		    ${project} ${target} ${config_name}
+
+		check_config || continue
+		build_elf
+		copy_elf
+	done
+}
+
+handle_dependencies()
+{
+	target_dir="${cfgsdir}/${target}"
+	mkdir -p "${elfdir}/${target}"
+
+	tree="undefined"
+	arch="undefined"
+
+	[ ! -f "${target_dir}/target.cfg" ] && \
+		err "build/${project} ${target}: Missing target.cfg"
+
+	# Override the above defaults using target.cfg
+	. "${target_dir}/target.cfg" # source
+
+	[ "${tree}" = "undefined" ] && \
+		err "build/${project} %{target}: tree undefined"
+	[ "${arch}" = "undefined" ] && \
+		err "build/${project} ${target}: undefined cpu type"
+
+	codedir="${project}/${tree}"
+	[ -d "${codedir}" ] || \
+		./fetch_trees "${project}" "$target" || exit 1
+
+	# u-boot and coreboot are both compiled with coreboot's crossgcc
+	if [ "${project}" = "coreboot" ] || [ "${project}" = "u-boot" ]; then
+		check_cross_compiler || err "crossgcc fail"
+	fi
+}
+
+# set up cross-compiler (coreboot crossgcc) for u-boot and coreboot
+# (seabios and grub currently use hostcc, not crossgcc)
+check_cross_compiler()
+{
+	[ "${crossgcc_ada}" = "y" ] || [ "${crossgcc_ada}" = "n" ] || \
+		crossgcc_ada="y"
+	[ "${crossgcc_ada}" != "y" ] && \
+		export BUILD_LANGUAGES=c
+
+	cbdir="coreboot/${tree}"
+	[ "${project}" != "coreboot" ] && \
+		cbdir="coreboot/default" # not u-boot (e.g. linux will use it)
+	[ "${project}" = "u-boot" ] && \
+		cbdir="coreboot/cros" # u-boot only used on coreboot/cros
+	# only true if not building coreboot:
+	[ -d "${cbdir}" ] || \
+		./fetch_trees coreboot ${cbdir#coreboot/} || \
+		    err "check_cross_compiler"
+
+	if [ "${arch}" = "x86_32" ] || [ "${arch}" = "x86_64" ]; then
+		if [ ! -d "${cbdir}/util/crossgcc/xgcc/i386-elf/" ]; then
+			# Even for 64-bit machines, coreboot builds 32-bit ROM
+			# images, so we only need to worry about i386-elf
+			make -C "${cbdir}" crossgcc-i386 CPUS=$(nproc) || \
+			    return 1
+		fi
+		case "$(uname -m)" in
+			x86*|i*86|amd64) : ;;
+			*) export CROSS_COMPILE=i386-elf- ;;
+		esac
+	elif [ "${arch}" = "ARMv7" ]; then
+		if [ ! -d "${cbdir}/util/crossgcc/xgcc/arm-eabi/" ]; then
+			make -C "${cbdir}" crossgcc-arm CPUS=$(nproc) || \
+			    return 1
+		fi
+		case "$(uname -m)" in
+			arm|arm32|armv6*|armv7*) : ;;
+			*) export CROSS_COMPILE=arm-eabi- ;;
+		esac
+	elif [ "${arch}" = "AArch64" ]; then
+		if [ ! -d "${cbdir}/util/crossgcc/xgcc/aarch64-elf/" ]; then
+			make -C "${cbdir}" crossgcc-aarch64 CPUS=$(nproc) || \
+			    return 1
+		fi
+		# aarch64 also needs armv7 toolchain for arm-trusted-firmware
+		if [ ! -d "${cbdir}/util/crossgcc/xgcc/arm-eabi/" ]; then
+			make -C "${cbdir}" crossgcc-arm CPUS=$(nproc) || \
+			    return 1
+		fi
+		case "$(uname -m)" in
+			arm64|aarch64) : ;;
+			*) export CROSS_COMPILE=aarch64-elf- ;;
+		esac
+	fi
+
+	# we *must* ensure that u-boot's build system uses crossgcc first
+	export PATH="$(pwd)/${cbdir}/util/crossgcc/xgcc/bin:$PATH"
+}
+
+check_config()
+{
+	[ ! -f "${config}" ] && \
+		err "build/${project} ${target}: configs missing"
+
+	dest_dir="${elfdir}/${target}/${config_name}"
+	for elftest in "${dest_dir}"/*; do
+		if [ -f "${elftest}" ]; then
+			printf "Build already exists, so skipping build\n" 1>&2
+			return 1
+		fi
+	done
+	mkdir -p "${dest_dir}"
+
+	printf "build/%s %s: building config %s).\n" \
+			${project} ${target} ${config_name}
+}
+
+build_elf()
+{
+	make -C "${codedir}" distclean || err "build_elf"
+
+	cp "${config}" "${codedir}/.config" || err "build_elf"
+	make -C "${codedir}" silentoldconfig || \
+	    make -C "${codedir}" oldconfig || : # don't error on oldconfig
+
+	[ "${project}" = "coreboot" ] && \
+		printf "%s\n" "${our_version}" > "${codedir}/.coreboot-version"
+	make -C "${codedir}" -j"$(nproc)" all || err "build_elf"
+}
+
+copy_elf()
+{
+	for f in $(cat "${listfile}"); do
+		[ -f "${codedir}/$f" ] && cp "${codedir}/${f}" "${dest_dir}/"
+	done
+
+	make -C "${codedir}" distclean || \
+	    make -C "${codedir}" clean || err "copy_elf"
+}
+
+err()
+{
+	[ -z "${codedir}" ] || \
+		make -C "${codedir}" distclean \
+		    || make -C "${codedir}" clean || :
+
+	printf "build/defconfig error %s\n" "${1}" 1>&2
+	exit 1
+}
+
+main $@
diff --git a/resources/scripts/build/payload/grub b/resources/scripts/build/payload/grub
index 0734f8a9..636e9f3e 100755
--- a/resources/scripts/build/payload/grub
+++ b/resources/scripts/build/payload/grub
@@ -34,12 +34,12 @@ main()
 		./fetch grub
 	[ ! -f "grub/grub-mkstandalone" ] && \
 		./build module grub
-	[ ! -d "payload/" ] && \
-		mkdir -p payload/
-	[ ! -d "payload/grub" ] && \
-		mkdir -p payload/grub/
+	[ ! -d "elf/" ] && \
+		mkdir -p elf/
+	[ ! -d "elf/grub" ] && \
+		mkdir -p elf/grub/
 
-	rm -f payload/grub/*
+	rm -f elf/grub/*
 
 	# Separate GRUB payload per keymap to save space in ROM.
 
@@ -47,7 +47,7 @@ main()
 		build_grub_payloads "${keylayoutfile}"
 	done
 
-	printf "Done! Check payload/grub/ to see the files.\n\n"
+	printf "Done! Check elf/grub/ to see the files.\n\n"
 }
 
 build_grub_payloads()
@@ -63,7 +63,7 @@ build_grub_payloads()
 	build_grub_elf "${keylayoutfile}"
 	create_grub_config
 
-	printf "Created 'payload/grub/grub_%s.elf' and configs.'\n" \
+	printf "Created 'elf/grub/grub_%s.elf' and configs.'\n" \
 			"${keymap}"
 }
 
@@ -77,7 +77,7 @@ build_grub_elf()
 	grub/grub-mkstandalone \
 			--grub-mkimage="grub/grub-mkimage" \
 			-O i386-coreboot \
-			-o payload/grub/grub_${keymap}.elf \
+			-o elf/grub/grub_${keymap}.elf \
 			-d grub/grub-core/ \
 			--fonts= --themes= --locales=  \
 			--modules="${grub_modules}" \
@@ -89,10 +89,10 @@ create_grub_config()
 {
 	sed "s/usqwerty/${keymap}/" \
 			< ${grubcfgsdir}/config/grub.cfg \
-			> payload/grub/grub_${keymap}.cfg
+			> elf/grub/grub_${keymap}.cfg
 	sed "s/grubtest.cfg/grub.cfg/" \
-			< payload/grub/grub_${keymap}.cfg \
-			> payload/grub/grub_${keymap}_test.cfg
+			< elf/grub/grub_${keymap}.cfg \
+			> elf/grub/grub_${keymap}_test.cfg
 }
 
 main $@
diff --git a/resources/scripts/build/payload/seabios b/resources/scripts/build/payload/seabios
deleted file mode 100755
index 43973109..00000000
--- a/resources/scripts/build/payload/seabios
+++ /dev/null
@@ -1,84 +0,0 @@
-#!/usr/bin/env sh
-
-#  helper script: builds SeaBIOS source code
-#
-#	Copyright (C) 2020, 2021, 2023 Leah Rowe <info@minifree.org>
-#	Copyright (C) 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
-#
-#    This program is free software: you can redistribute it and/or modify
-#    it under the terms of the GNU General Public License as published by
-#    the Free Software Foundation, either version 3 of the License, or
-#    (at your option) any later version.
-#
-#    This program is distributed in the hope that it will be useful,
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-#    GNU General Public License for more details.
-#
-#    You should have received a copy of the GNU General Public License
-#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-#
-
-[ "x${DEBUG+set}" = 'xset' ] && set -v
-set -u -e
-
-payloaddir="payload/seabios"
-seabios_elf="seabios/out/bios.bin.elf"
-seavgabios="seabios/out/vgabios.bin"
-
-main()
-{
-	printf "Building SeaBIOS payloads and SeaVGABIOS\n"
-
-	check_dependencies
-
-	for x in normal vgarom libgfxinit; do
-		build_seabios_elf "${x}"
-	done
-
-	# clean it again. gotta keep it clean!
-	if [ -f seabios/Makefile ]; then
-		make distclean -BC seabios || exit 1
-	fi
-
-	printf "Done! SeaBIOS files are in %s/\n\n" ${payloaddir}
-}
-
-check_dependencies()
-{
-	if [ ! -d "${payloaddir}" ]; then
-		mkdir -p ${payloaddir}/ || exit 1
-	fi
-
-	rm -f ${payloaddir}/* || exit 1
-
-	if [ ! -d "seabios/" ]; then
-	    ./fetch seabios || exit 1
-	fi
-}
-
-build_seabios_elf()
-{
-	inittype=${1}
-
-	if [ ! -f seabios/Makefile ]; then
-		printf "SeaBIOS not properly downloaded.\n"
-		exit 1
-	fi
-
-	make distclean -BC seabios || exit 1
-
-	cp "resources/seabios/config/${inittype}" seabios/.config
-	make silentoldconfig -j$(nproc) -BC seabios || exit 1
-	make -j$(nproc) -BC seabios || exit 1
-
-	seabios_elf_dst="${payloaddir}/seabios_${inittype}.elf"
-	cp ${seabios_elf} "${seabios_elf_dst}" || exit 1
-
-	if [ "${inittype}" = "libgfxinit" ]; then
-		cp ${seavgabios} ${payloaddir}/seavgabios.bin || exit 1
-	fi
-	rm -f seabios/.config || exit 1
-}
-
-main $@
diff --git a/resources/scripts/build/payload/u-boot b/resources/scripts/build/payload/u-boot
deleted file mode 100755
index a98d133d..00000000
--- a/resources/scripts/build/payload/u-boot
+++ /dev/null
@@ -1,179 +0,0 @@
-#!/usr/bin/env sh
-
-#  helper script: builds U-Boot source code
-#
-#	Copyright (C) 2022 Alper Nebi Yasak <alpernebiyasak@gmail.com>
-#	Copyright (C) 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
-#	Copyright (C) 2023 Leah Rowe <leah@libreboot.org>
-#
-#    This program is free software: you can redistribute it and/or modify
-#    it under the terms of the GNU General Public License as published by
-#    the Free Software Foundation, either version 3 of the License, or
-#    (at your option) any later version.
-#
-#    This program is distributed in the hope that it will be useful,
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-#    GNU General Public License for more details.
-#
-#    You should have received a copy of the GNU General Public License
-#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-[ "x${DEBUG+set}" = 'xset' ] && set -v
-set -u -e
-
-RET=0
-pdir="payload/u-boot"
-ubdir=""
-arch=""
-tree=""
-config_name=""
-board_dir=""
-
-our_version="$(cat version)"
-projectname="$(cat projectname)"
-
-export LOCALVERSION="-${projectname}-${our_version}"
-
-main()
-{
-	printf "Building U-Boot payloads\n"
-
-	# Build for all boards if no argument is given
-	if [ "$#" -eq 0 ]; then
-		for board_dir in resources/u-boot/*; do
-			[ ! -d "${board_dir}/config/" ] && \
-				continue
-			set -- "$@" "${board_dir#resources/u-boot/}"
-		done
-	fi
-
-	[ ! -d "payload/" ] && \
-		mkdir -p payload/
-	[ ! -d "${pdir}" ] && \
-		mkdir -p ${pdir}/
-
-	for board in "$@"; do
-		build_uboot_payloads "${board}" || continue
-	done
-
-	printf "Done! U-Boot files are in %s/\n\n" ${pdir}
-	exit $RET
-}
-
-build_uboot_payloads()
-{
-	board=${1}
-
-	handle_dependencies "${board}" || return 1
-
-	for config in "${board_dir}/config"/*; do
-		config_name="${config#$board_dir/config/}"
-
-		check_config "${board}" "${config}" || continue
-		build_uboot_elf "${config}"
-
-		printf "build/u-boot %s: build config %s\n" \
-				"${board}" "${config_name}"
-	done
-}
-
-handle_dependencies()
-{
-	board=${1}
-
-	board_dir="resources/u-boot/${board}"
-	rm -rf "${pdir}/${board}"
-	mkdir -p "${pdir}/${board}"
-
-	tree="undefined"
-	arch="undefined"
-
-	if [ ! -f "${board_dir}/target.cfg" ]; then
-		printf "build/u-boot %s: Missing target.cfg.\n" \
-				"${board}"
-		RET=1
-		return 1
-	fi
-
-	# Override the above defaults using target.cfg
-	. "${board_dir}/target.cfg" # source
-
-	if [ "${tree}" = "undefined" ]; then
-		printf "build/u-boot %s: tree undefined\n" \
-				"${board}"
-		RET=1
-		return 1
-	fi
-	if [ "${arch}" = "undefined" ]; then
-		printf "build/u-boot %s: undefined cpu type\n" \
-				"${board}"
-		RET=1
-		return 1
-	fi
-
-	ubdir="u-boot/${board}"
-	if [ "${board}" != "${tree}" ]; then
-		ubdir="u-boot/${tree}"
-	fi
-
-	if [ ! -d "${ubdir}" ]; then
-		./fetch_trees u-boot "$board"
-	fi
-
-	if [ ! -d "${ubdir}" ]; then
-		printf "build/u-boot %s: uboot download failed\n" \
-				"${board}"
-		RET=1
-		return 1
-	fi
-}
-
-check_config()
-{
-	board=${1}
-	config=${2}
-
-	if [ ! -f "${config}" ]; then
-		printf "build/u-boot %s: configs missing\n" \
-				${board}
-		RET=1
-		return 1
-	fi
-
-	if [ "$config_name" = "default" ]; then
-		dest_dir="${pdir}/${board}"
-	else
-		dest_dir="${pdir}/${board}/${config_name}"
-	fi
-	mkdir -p "${dest_dir}"
-
-	printf "build/u-boot %s: building config %s).\n" \
-			${board} ${config_name}
-}
-
-build_uboot_elf()
-{
-	config=${1}
-
-	make -C "${ubdir}" distclean
-
-	cp "${config}" "${ubdir}/.config"
-	make -C "${ubdir}" olddefconfig
-	make -C "${ubdir}" -j"$(nproc)" all
-
-	for f in "${ubdir}"/u-boot "${ubdir}"/u-boot.bin \
-			"${ubdir}"/u-boot.dtb \
-			"${ubdir}"/u-boot.img \
-			"${ubdir}"/u-boot.itb \
-			"${ubdir}"/u-boot.elf
-	do
-		if [ -f "$f" ]; then
-			mv "$f" "${dest_dir}/"
-		fi
-	done
-
-	make -C "${ubdir}" distclean
-}
-
-main $@
diff --git a/resources/scripts/modify/seabios/configs b/resources/scripts/modify/seabios/configs
index fa3d1372..b07dfff8 100755
--- a/resources/scripts/modify/seabios/configs
+++ b/resources/scripts/modify/seabios/configs
@@ -30,7 +30,7 @@ main()
 download_seabios()
 {
 	if [ ! -d "seabios" ]; then
-		./fetch seabios
+		./fetch_trees seabios
 	fi
 	if [ ! -d "seabios" ]; then
 		printf "error: Failed to download SeaBIOS. "
diff --git a/resources/scripts/update/seabios/configs b/resources/scripts/update/seabios/configs
index 8e8377bb..91002502 100755
--- a/resources/scripts/update/seabios/configs
+++ b/resources/scripts/update/seabios/configs
@@ -28,7 +28,7 @@ set -u -e
 printf "Updating seabios configs\n"
 
 if [ ! -d "seabios" ]; then
-	./fetch seabios
+	./fetch_trees seabios
 fi
 
 if [ ! -d "seabios" ]; then
diff --git a/resources/seabios/build.list b/resources/seabios/build.list
new file mode 100644
index 00000000..d6fefb4e
--- /dev/null
+++ b/resources/seabios/build.list
@@ -0,0 +1,2 @@
+out/bios.bin.elf
+out/vgabios.bin
diff --git a/resources/seabios/config/libgfxinit b/resources/seabios/default/config/libgfxinit
similarity index 100%
rename from resources/seabios/config/libgfxinit
rename to resources/seabios/default/config/libgfxinit
diff --git a/resources/seabios/config/normal b/resources/seabios/default/config/normal
similarity index 100%
rename from resources/seabios/config/normal
rename to resources/seabios/default/config/normal
diff --git a/resources/seabios/config/vgarom b/resources/seabios/default/config/vgarom
similarity index 100%
rename from resources/seabios/config/vgarom
rename to resources/seabios/default/config/vgarom
diff --git a/resources/seabios/default/target.cfg b/resources/seabios/default/target.cfg
new file mode 100644
index 00000000..c5b428e0
--- /dev/null
+++ b/resources/seabios/default/target.cfg
@@ -0,0 +1,3 @@
+arch="x86_32"
+tree="default"
+rev="1281e340ad1d90c0cc8e8d902bb34f1871eb48cf"
diff --git a/resources/u-boot/build.list b/resources/u-boot/build.list
new file mode 100644
index 00000000..1bb9a446
--- /dev/null
+++ b/resources/u-boot/build.list
@@ -0,0 +1,5 @@
+u-boot.bin
+u-boot.dtb
+u-boot.img
+u-boot.itb
+u-boot.elf