lbmk/resources/scripts/build/boot/roms_helper

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#!/usr/bin/env sh
# helper script: create ROM images for a given mainboard
#
# Copyright (C) 2020,2021 Leah Rowe <info@minifree.org>
# Copyright (C) 2021,2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
# Copyright (C) 2022 Caleb La Grange <thonkpeasant@protonmail.com>
# Copyright (C) 2022 Alper Nebi Yasak <alpernebiyasak@gmail.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/>.
#
# This script assumes that the working directory is the root
# of git or release archive
[ "x${DEBUG+set}" = 'xset' ] && set -v
set -u -e
projectname="$(cat projectname)"
displaymodes=""
payloads=""
keyboard_layouts=""
while [ $# -gt 0 ]; do
case ${1} in
-d)
displaymodes="${displaymodes}${2}"
shift ;;
-p)
payloads="${payloads}${2}"
shift ;;
-k)
keyboard_layouts="${keyboard_layouts}${2}"
shift ;;
*)
board=${1} ;;
esac
shift
done
echo "board is $board , kb is ${keyboard_layouts} , displaymode is ${displaymodes} , payloads is ${payloads}"
if [ ! -d "resources/coreboot/${board}" ]; then
printf "build/roms: Target %s does not exist in the %s build system. Skipping build.\n" "${projectname}" "${board}"
exit 1
fi
if [ ! -f "resources/coreboot/${board}/board.cfg" ]; then
printf "build/roms: Target %s does not have a board.cfg. Skipping build.\n" "${board}"
exit 1
fi
# Workaround to grub's slow boot
grub_scan_disk="undefined" # both: scan ata and ahci (slow), there is ata and ahci too
# as an option
cbtree="undefined"
romtype="normal" # optional parameter in board.cfg. "normal" is default
arch="undefined"
# Disable all payloads by default.
# board.cfg files have to specifically enable [a] payload(s)
payload_grub="n"
payload_grub_withseabios="n" # seabios chainloaded from grub
payload_seabios="n"
payload_seabios_withgrub="n" # i386-coreboot grub accessible from SeaBIOS boot menu
seabios_opromloadonly="0"
payload_memtest="n"
payload_uboot="n"
uboot_config="undefined"
# Override the above defaults using board.cfg
. "resources/coreboot/${board}/board.cfg"
if [ "${grub_scan_disk}" = "undefined" ]; then
printf "build/roms: Target %s does not define grub_scan_disk. Defaulting to 'both'.\n" "${board}"
grub_scan_disk="both"
fi
if [ "${grub_scan_disk}" != "both" ] && \
[ "${grub_scan_disk}" != "ata" ] && \
[ "${grub_scan_disk}" != "ahci" ]; then
printf "build/roms: Target %s defines an invalid grub_scan_disk setting. Defaulting to 'both'.\n" "${board}"
grub_scan_disk="both"
# erroring out would be silly. just use the default
fi
if [ "${cbtree}" = "undefined" ]; then
printf "build/roms: Target %s does not define a coreboot tree. Skipping build.\n" "${board}"
exit 1
fi
if [ "${arch}" = "undefined" ]; then
printf "build/roms: Target %s does not define a CPU type. Skipping build.\n" "${board}"
exit 1
fi
if [ "${seabios_opromloadonly}" != "0" ] && \
[ "${seabios_opromloadonly}" != "1" ]; then
seabios_opromloadonly="0"
fi
if [ "${payload_memtest}" != "n" ] && \
[ "${payload_memtest}" != "y" ]; then
payload_memtest="n"
fi
if [ "${payload_grub_withseabios}" = "y" ]; then
payload_grub="y"
fi
if [ "${payload_grub_withseabios}" = "y" ]; then
payload_seabios="y"
payload_seabios_withgrub="y" # if grub-first works, then seabios-with-grub will also work
fi
if [ "${payload_seabios_withgrub}" = "y" ]; then
payload_seabios="y" # if seabios-with-grub works, then SeaBIOS-alone should also work
fi
# NOTE: reverse logic must not be applied. If SeaBIOS-with-GRUB works, that doesn't
# necessarily mean GRUB-with-SeaBIOS will work nicely. for example, the board might
# only have an add-on GPU available, where it's recommended to boot SeaBIOS first
if [ "${payload_grub}" != "y" ] && [ "${payload_seabios}" != "y" ] && [ "${payload_uboot}" != "y" ]; then
while true; do
for configfile in "resources/coreboot/${board}/config/"*; do
if [ -f "${configfile}" ]; then
printf "ERROR build/roms: Target '%s' does not define a payload. Exiting.\n" "${board}"
exit 1
fi
done
break
done
fi
if [ "${payload_uboot}" != "n" ] && \
[ "${payload_uboot}" != "y" ]; then
payload_uboot="n"
fi
if [ "${payload_uboot}" = "y" ] && \
[ "${uboot_config}" = "undefined" ]; then
uboot_config="default"
fi
# Override all payload directives with cmdline args
if [ ! -z ${payloads} ]; then
echo "setting payloads $payloads"
payload_grub="n"
payload_grub_withseabios="n" # seabios chainloaded from grub
payload_seabios="n"
payload_seabios_withgrub="n" # i386-coreboot grub accessible from SeaBIOS boot menu
payload_uboot="n"
seabios_opromloadonly="0"
payload_memtest="n"
for payload in ${payloads} ; do
eval "payload_${payload}=y"
done
fi
romdir="bin/${board}"
cbdir="coreboot/${board}"
if [ "${board}" != "${cbtree}" ]; then
cbdir="coreboot/${cbtree}"
fi
cbfstool="${cbdir}/util/cbfstool/cbfstool"
corebootrom="${cbdir}/build/coreboot.rom"
seavgabiosrom="payload/seabios/seavgabios.bin"
if [ ! -d "${cbdir}" ]; then
./download coreboot ${cbtree}
fi
cat version > "${cbdir}/.coreboot-version"
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 "${cbfstool}" ]; then
./build module cbutils ${cbtree}
fi
if [ ! -f "${seavgabiosrom}" ] \
|| [ ! -f payload/seabios/seabios_libgfxinit.elf ] \
|| [ ! -f payload/seabios/seabios_vgarom.elf ]; then
if [ "${payload_seabios}" = "y" ]; then
./build payload seabios
elif [ "${payload_grub}" = "y" ] \
&& [ "${payload_grub_withseabios}" = "y" ]; then
./build payload seabios
fi
fi
if [ "${payload_memtest}" = "y" ]; then
if [ ! -f "memtest86plus/memtest" ]; then
./build module memtest86plus
fi
fi
[ -d "${romdir}/" ] || mkdir -p "${romdir}/"
rm -f "${romdir}"/*
if [ "${payload_grub}" = "y" ] || [ "${payload_seabios_withgrub}" = "y" ]; then
if [ -f "payload/grub/grub_usqwerty.cfg" ]; then
grubrefchecksum="$(sha1sum resources/grub/config/grub.cfg | awk '{print $1}')"
grubbuildchecksum="$(sha1sum payload/grub/grub_usqwerty.cfg | awk '{print $1}')"
if [ "${grubrefchecksum}" != "${grubbuildchecksum}" ]; then
rm -Rf payload/grub/
printf "Changes detected to GRUB. Re-building now:\n"
fi
else
printf "Required GRUB payloads not yet built. Building now:\n"
rm -Rf payload/grub/ # just in case
fi
for keymapfile in resources/grub/keymap/*; do
if [ ! -f "${keymapfile}" ]; then
continue
fi
keymap="${keymapfile##*/}"
keymap="${keymap%.gkb}"
grubelf="payload/grub/grub_${keymap}.elf"
grubcfg="payload/grub/grub_${keymap}.cfg"
grubtestcfg="payload/grub/grub_${keymap}_test.cfg"
if [ ! -f "${grubelf}" ] || [ ! -f "${grubcfg}" ] || \
[ ! -f "${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="${ubdir}/u-boot"
else
printf "Required U-Boot payloads not yet built. Building now:\n"
rm -Rf "payload/u-boot/${board}" # just in case
./build payload u-boot "${board}"
fi
fi
# it is assumed that no other work will be done on the ROM
# after calling this function. therefore this function is "final"
moverom() {
rompath="$1"
newrompath="$2"
cuttype="$3"
printf "\nCreating new ROM image: %s\n" "${newrompath}"
if [ "${cuttype}" = "4MiB IFD BIOS region" ]; then
dd if=${rompath} of=${newrompath} bs=1 skip=$(($(stat -c %s ${rompath}) - 0x400000)) count=4194304
else
cp ${rompath} ${newrompath}
fi
for romsize in 4 8 16; do
if [ "${cuttype}" = "${romsize}MiB ICH9 IFD NOR flash" ]; then
if [ ! -f "descriptors/ich9m/ich9fdgbe_${romsize}m.bin" ]; then
./build descriptors ich9m
fi
dd if=descriptors/ich9m/ich9fdgbe_${romsize}m.bin of=${newrompath} bs=1 count=12k conv=notrunc
fi
if [ "${cuttype}" = "${romsize}MiB ICH9 IFD NOGBE NOR flash" ]; then
if [ ! -f "descriptors/ich9m/ich9fdnogbe_${romsize}m.bin" ]; then
./build descriptors ich9m
fi
dd if=descriptors/ich9m/ich9fdnogbe_${romsize}m.bin of=${newrompath} bs=1 count=4k conv=notrunc
fi
done
if [ "${cuttype}" = "i945 laptop" ]; then
dd if=${newrompath} of=top64k.bin bs=1 skip=$(($(stat -c %s ${newrompath}) - 0x10000)) count=64k
dd if=top64k.bin of=${newrompath} bs=1 seek=$(($(stat -c %s ${newrompath}) - 0x20000)) count=64k conv=notrunc
rm -f top64k.bin
fi
}
# expected: configs must not specify a payload
mkCoreboot() {
cbdir="${1}" # e.g. coreboot/default
cbcfgpath="${2}" # e.g. resources/coreboot/x200_8mb/config/libgfxinit_txtmode
if [ ! -f "${cbcfgpath}" ]; then
printf "\nmkCoreboot: Coreboot config '%s' does not exist. Skipping build.\n" \
"${cbcfgpath}"
return 0
fi
printf "%s-%s\n" "$(cat projectname)" "$(cat version)" > "${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
./build module cbutils ${cbdir#coreboot/}
(
cd "${cbdir}"
make -j$(nproc)
)
}
# make a rom in /tmp/ and then print the path of that ROM
make_seabios_rom() {
target_cbrom="${1}" # rom to insert seabios in. this rom won't be touched
# a tmpfile will be made instead
target_seabios_cbfs_path="${2}" # e.g. fallback/payload
target_opromloadonly="${3}" # 0 or 1. if 1, only load but don't execute oproms
target_initmode="${4}" # e.g. libgfxinit
if [ "${target_initmode}" = "normal" ]; then
target_seabioself="payload/seabios/seabios_vgarom.elf"
# if normal, etc/pci-optionrom-exec will be set to 2
else
target_seabioself="payload/seabios/seabios_${target_initmode}.elf"
# if libgfxinit, etc/pci-optionrom-exec will be set to 2
# if vgarom, etc/pci-optionrom-exec will be set to 0
fi
target_seavgabios_rom="payload/seabios/seavgabios.bin"
tmprom=$(mktemp -t coreboot_rom.XXXXXXXXXX)
cp "${target_cbrom}" "${tmprom}"
"${cbfstool}" "${tmprom}" add-payload -f "${target_seabioself}" -n ${target_seabios_cbfs_path} -c lzma || exit 1
"${cbfstool}" "${tmprom}" add-int -i 3000 -n etc/ps2-keyboard-spinup || exit 1
if [ "${target_initmode}" = "normal" ] || [ "${target_initmode}" = "libgfxinit" ]; then
"${cbfstool}" "${tmprom}" add-int -i 2 -n etc/pci-optionrom-exec || exit 1
elif [ "${target_initmode}" = "vgarom" ]; then
"${cbfstool}" "${tmprom}" add-int -i 0 -n etc/pci-optionrom-exec || exit 1
fi # for undefined modes, don't add this integer. rely on SeaBIOS defaults
"${cbfstool}" "${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 "${target_seavgabios_rom}" -n vgaroms/seavgabios.bin -t raw || exit 1
fi
printf "%s\n" "${tmprom}"
}
# make a rom in /tmp/ and then print the path of that ROM
make_uboot_payload_rom() {
target_cbrom="${1}" # rom to insert u-boot in. this rom won't be touched
# a tmpfile will be made instead
target_uboot_cbfs_path="${2}" # e.g. fallback/payload
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
tmprom=$(mktemp -t coreboot_rom.XXXXXXXXXX)
cp "${target_cbrom}" "${tmprom}"
"${cbfstool}" "${tmprom}" add-payload -f "${target_ubootelf}" -n ${target_uboot_cbfs_path} -c lzma || exit 1
printf "%s\n" "${tmprom}"
}
# make a rom in /tmp/ and then print the path of that ROM
make_grubrom_from_keymap() {
target_keymap="${1}"
target_cbrom="${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"
tmprom=$(mktemp -t coreboot_rom.XXXXXXXXXX) || exit 1
cp "${target_cbrom}" "${tmprom}" || exit 1
"${cbfstool}" "${tmprom}" add-payload -f "${grubelf}" -n ${target_grubelf_cbfs_path} -c lzma || exit 1
tmpgrubcfg=$(mktemp -t grub.cfg.XXXXXXXXXX)
tmpgrubtestcfg=$(mktemp -t grubtest.cfg.XXXXXXXXXX)
if [ "${grub_scan_disk}" = "ahci" ]; then
sed 's/set\ grub_scan_disk=\"both\"/set\ grub_scan_disk=\"ahci\"/' "${grubcfg}" > "${tmpgrubcfg}"
sed 's/set\ grub_scan_disk=\"both\"/set\ grub_scan_disk=\"ahci\"/' "${grubtestcfg}" > "${tmpgrubtestcfg}"
elif [ "${grub_scan_disk}" = "ata" ]; then
sed 's/set\ grub_scan_disk=\"both\"/set\ grub_scan_disk=\"ata\"/' "${grubcfg}" > "${tmpgrubcfg}"
sed 's/set\ grub_scan_disk=\"both\"/set\ grub_scan_disk=\"ata\"/' "${grubtestcfg}" > "${tmpgrubtestcfg}"
else
cp "${grubcfg}" "${tmpgrubcfg}"
cp "${grubtestcfg}" "${tmpgrubtestcfg}"
fi
"${cbfstool}" "${tmprom}" add -f "${tmpgrubcfg}" -n grub.cfg -t raw || exit 1
"${cbfstool}" "${tmprom}" add -f "${tmpgrubtestcfg}" -n grubtest.cfg -t raw || exit 1
rm -f "${tmpgrubcfg}" "${tmpgrubtestcfg}"
backgroundfile="background1280x800.png"
if [ "${board}" = "x60" ] || [ "${board}" = "t60_intelgpu" ]; then
# TODO: don't hardcode this check. do it in board.cfg per board
backgroundfile="background1024x768.png"
fi
backgroundfile="resources/grub/background/${backgroundfile}"
"${cbfstool}" "${tmprom}" add -f ${backgroundfile} -n background.png -t raw || exit 1
printf "%s\n" "${tmprom}"
}
# Make separate ROM images with GRUB payload, for each supported keymap
mkRomsWithGrub() {
tmprompath="${1}"
initmode="${2}"
displaymode="${3}"
firstpayloadname="${4}" # allow values: grub, seabios, seabios_withgrub
if [ "${payload_grub_withseabios}" = "y" ] && [ "${firstpayloadname}" = "grub" ]; then
mv "$(make_seabios_rom "${tmprompath}" "seabios.elf" "${seabios_opromloadonly}" "${initmode}")" "${tmprompath}"
elif [ "${payload_seabios_withgrub}" ] && [ "${firstpayloadname}" != "grub" ]; then
mv "$(make_seabios_rom "${tmprompath}" "fallback/payload" "${seabios_opromloadonly}" "${initmode}")" "${tmprompath}"
fi
keymaps=""
if [ -z ${keyboard_layouts} ]; then
keymaps="resources/grub/keymap/*"
else
for keymapname in ${keyboard_layouts}; do
keymaps="${keymaps} resources/grub/keymap/${keymapname}.gkb"
done
fi
for keymapfile in ${keymaps}; do
echo "keymaps is $keymaps, keymapfile is $keymapfile"
if [ ! -f "${keymapfile}" ]; then
continue
fi
keymap="${keymapfile##*/}"
keymap="${keymap%.gkb}"
grub_path_in_cbfs="fallback/payload"
if [ "${firstpayloadname}" != "grub" ]; then
grub_path_in_cbfs="img/grub2"
fi
tmpgrubrom="$(make_grubrom_from_keymap "${keymap}" "${tmprompath}" "${grub_path_in_cbfs}")"
if [ "${initmode}" = "normal" ]; then
newrompath="${romdir}/${firstpayloadname}_${board}_${initmode}_${keymap}.rom"
else
newrompath="${romdir}/${firstpayloadname}_${board}_${initmode}_${displaymode}_${keymap}.rom"
fi
moverom "${tmpgrubrom}" "${newrompath}" "${romtype}"
rm -f "${tmpgrubrom}"
done
}
# Main ROM building function. This calls all other functions
mkRoms() {
cbcfgpath="${1}"
displaymode="${2}"
initmode="${3}"
if [ ! -f "${cbcfgpath}" ]; then
printf "'%s' does not exist. Skipping build for %s %s %s\n" \
"${cbcfgpath}" "${board}" "${displaymode}" "${initmode}"
return 0
fi
mkCoreboot "${cbdir}" "${cbcfgpath}"
if [ "${displaymode}" = "txtmode" ] && [ "${payload_memtest}" = "y" ]; then
"${cbfstool}" "${corebootrom}" add-payload -f memtest86plus/memtest -n img/memtest -c lzma || exit 1
fi
if [ "${payload_seabios}" = "y" ]; then
if [ "${payload_seabios_withgrub}" = "n" ]; then
tmpseabiosrom="$(make_seabios_rom "${corebootrom}" "fallback/payload" "${seabios_opromloadonly}" "${initmode}")"
if [ "${initmode}" = "normal" ]; then
newrompath="${romdir}/seabios_${board}_${initmode}.rom"
else
newrompath="${romdir}/seabios_${board}_${initmode}_${displaymode}.rom"
fi
moverom "${tmpseabiosrom}" "${newrompath}" "${romtype}"
rm -f "${tmpseabiosrom}"
else
tmprom=$(mktemp -t coreboot_rom.XXXXXXXXXX)
cp "${corebootrom}" "${tmprom}"
mkRomsWithGrub "${tmprom}" "${initmode}" "${displaymode}" "seabios_withgrub"
rm -f "${tmprom}"
fi
fi
if [ "${payload_grub}" = "y" ]; then
mkRomsWithGrub "${corebootrom}" "${initmode}" "${displaymode}" "grub"
fi
if [ "${payload_uboot}" = "y" ]; then
tmpubootrom="$(make_uboot_payload_rom "${corebootrom}" "fallback/payload" "${uboot_config}" "${cbfstool}")"
if [ "${initmode}" = "normal" ]; then
newrompath="${romdir}/uboot_payload_${board}_${initmode}.rom"
else
newrompath="${romdir}/uboot_payload_${board}_${initmode}_${displaymode}.rom"
fi
moverom "${tmpubootrom}" "${newrompath}" "${romtype}"
rm -f "${tmpubootrom}"
fi
}
if [ -z ${displaymodes} ]; then
initmode="libgfxinit"
for displaymode in corebootfb txtmode; do
cbcfgpath="resources/coreboot/${board}/config/${initmode}_${displaymode}"
mkRoms "${cbcfgpath}" "${displaymode}" "${initmode}"
done
initmode="vgarom"
for displaymode in vesafb txtmode; do
cbcfgpath="resources/coreboot/${board}/config/${initmode}_${displaymode}"
mkRoms "${cbcfgpath}" "${displaymode}" "${initmode}"
done
initmode="normal"
displaymode="txtmode"
cbcfgpath="resources/coreboot/${board}/config/${initmode}"
mkRoms "${cbcfgpath}" "${displaymode}" "${initmode}"
else
echo "special displaymode defined as $displaymodes"
initmode="libgfxinit"
for displaymode in ${displaymodes}; do
cbcfgpath="resources/coreboot/${board}/config/${initmode}_${displaymode}"
mkRoms "${cbcfgpath}" "${displaymode}" "${initmode}"
done
initmode="vgarom"
for displaymode in ${displaymodes}; do
cbcfgpath="resources/coreboot/${board}/config/${initmode}_${displaymode}"
mkRoms "${cbcfgpath}" "${displaymode}" "${initmode}"
done
fi
(
cd "${cbdir}"
make distclean
)