#!/usr/bin/env sh
# SPDX-License-Identifier: GPL-3.0-or-later
# SPDX-FileCopyrightText: 2014-2016,2020,2021,2023 Leah Rowe <leah@libreboot.org>
# SPDX-FileCopyrightText: 2021,2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
# SPDX-FileCopyrightText: 2022 Caleb La Grange <thonkpeasant@protonmail.com>
# SPDX-FileCopyrightText: 2022-2023 Alper Nebi Yasak <alpernebiyasak@gmail.com>
# SPDX-FileCopyrightText: 2023 Riku Viitanen <riku.viitanen@protonmail.com>

[ "x${DEBUG+set}" = 'xset' ] && set -v
set -u -e

. "include/err.sh"
. "include/option.sh"

seavgabiosrom="elf/seabios/default/libgfxinit/vgabios.bin"
grub_background="background1280x800.png"
grubelf="elf/grub/grub.elf"
cfgsdir="config/coreboot"
kmapdir="config/grub/keymap"

# Disable all payloads by default.
# target.cfg files have to specifically enable [a] payload(s)
pv="payload_grub payload_grub_withseabios payload_seabios payload_memtest"
pv="${pv} payload_seabios_withgrub payload_seabios_grubonly payload_uboot memtest_bin"
v="romdir cbrom initmode displaymode cbcfg targetdir tree arch"
v="${v} grub_timeout ubdir board grub_scan_disk uboot_config"
eval "$(setvars "n" ${pv})"
eval "$(setvars "" ${v} boards _displaymode _payload _keyboard all targets)"

main()
{
	while [ $# -gt 0 ]; do
		case ${1} in
		help) usage && exit 0 ;;
		list) items config/coreboot && exit 0 ;;
		-d) _displaymode="${2}" ;;
		-p) _payload="${2}" ;;
		-k) _keyboard="${2}" ;;
		*)
			[ "${1}" = "all" ] && all="y"
			boards="${1} ${boards}"
			shift && continue ;;
		esac
		shift 2
	done

	[ "${all}" != "y" ] || boards=$(items config/coreboot) || \
	    err "Cannot generate list of boards for building"

	for x in ${boards}; do
		eval "$(setvars "n" ${pv})"
		eval "$(setvars "" ${v})"
		grub_background="background1280x800.png"
		board="${x}"
		check_target
		prepare_target
		[ -d "bin/${board}" ] || continue
		targets="* bin/${board}\n${targets}"
	done

	[ -z "${targets}" ] && err "No ROM images were compiled"
	printf "\nROM images available in these directories:\n"
	printf "${targets}^^ ROM images available in these directories.\n\n"

	printf "DO NOT flash ROM images from elf/ - please use bin/ instead.\n"
}

check_target()
{
	targetdir="${cfgsdir}/${board}"
	[ -f "${targetdir}/target.cfg" ] || \
		err "Missing target.cfg for target: ${board}"

	# Override the above defaults using target.cfg
	. "${targetdir}/target.cfg"

	[ -z "${grub_scan_disk}" ] && \
		grub_scan_disk="both"
	[ "${grub_scan_disk}" != "both" ] && [ "${grub_scan_disk}" != "ata" ] \
	    && [ "${grub_scan_disk}" != "ahci" ] && \
		grub_scan_disk="both"

	[ -z "${tree}" ] && \
		err "Target '${board}' defines no tree. Skipping build."
	[ -z "${arch}" ] && \
		err "Target '${board}' defines no arch. Skipping build."

	[ "${payload_memtest}" != "y" ] && \
		payload_memtest="n"
	[ "${payload_grub_withseabios}" = "y" ] && \
		payload_grub="y"
	[ "${payload_grub_withseabios}" = "y" ] && \
		eval "$(setvars "y" payload_seabios payload_seabios_withgrub)"
	[ "${payload_seabios_withgrub}" = "y" ] && \
		payload_seabios="y"
	if [ "${payload_seabios_grubonly}" = "y" ]; then
		payload_seabios="y"
		payload_seabios_withgrub="y"
	fi

	# The reverse logic must not be applied. If SeaBIOS-with-GRUB works,
	# that doesn't mean GRUB-withSeaBIOS will. For example, the board
	# might have a graphics card whose vga rom coreboot doesn't execute
	[ "${payload_grub}" != "y" ] && [ "${payload_seabios}" != "y" ] && \
	    [ "${payload_uboot}" != "y" ] && \
		for configfile in "${targetdir}/config/"*; do
			[ -e "${configfile}" ] || continue
			err "target '${board}' defines no payload"
		done

	[ "${payload_uboot}" != "n" ] && [ "${payload_uboot}" != "y" ] && \
		payload_uboot="n"
	[ "${payload_uboot}" = "y" ] && [ -z "${uboot_config}" ] && \
		uboot_config="default"

	# Override all payload directives with cmdline args
	[ -z "${_payload}" ] && return 0
	printf "setting payload to: %s\n" "${_payload}"
	eval "$(setvars "n" payload_grub payload_memtest payload_seabios \
	    payload_seabios_withgrub payload_uboot payload_grub_withseabios \
	    payload_seabios_grubonly)"
	eval "payload_${_payload}=y"
}

prepare_target()
{
	romdir="bin/${board}"
	cbdir="src/coreboot/${board}"
	[ "${board}" = "${tree}" ] || cbdir="src/coreboot/${tree}"
	cbfstool="cbutils/${tree}/cbfstool"
	cbrom="${cbdir}/build/coreboot.rom"

	[ -f "${cbfstool}" ] || \
		x_ ./update trees -b coreboot utils ${tree}

	build_dependency_seabios

	memtest_bin="memtest86plus/build64/memtest.bin"
	[ "${payload_memtest}" != "y" ] || [ -f "src/${memtest_bin}" ] || \
		x_ ./update trees -b memtest86plus

	rm -f "${romdir}/"* || err "!prepare, rm files, ${romdir}"

	build_dependency_grub
	build_dependency_uboot
	build_target
}

build_dependency_seabios()
{
	[ "${payload_seabios}" = "y" ] || return 0
	[ -f "${seavgabiosrom}" ] && \
	    [ -f elf/seabios/default/libgfxinit/bios.bin.elf ] && \
	    [ -f elf/seabios/default/vgarom/bios.bin.elf ] && \
	    [ -f elf/seabios/default/normal/bios.bin.elf ] && return 0

	x_ ./update trees -b seabios
}

build_dependency_grub()
{
	[ "${payload_grub}" != "y" ] && \
	    [ "${payload_seabios_withgrub}" != "y" ] && \
	    [ "${payload_seabios_grubonly}" != "y" ] && return 0

	rebuild_grub="n"
	[ -f "${grubelf}" ] || rebuild_grub="y"
	for keymapfile in "${kmapdir}"/*.gkb; do
		[ "${rebuild_grub}" = "y" ] || break
		[ -f "${keymapfile}" ] || continue

		keymap="${keymapfile##*/}"
		keymap="${keymap%.gkb}"
		[ ! -f "elf/grub/keymap_${keymap}.cfg" ] && \
		    rebuild_grub="y" && break
	done
	[ "${rebuild_grub}" = "y" ] || return 0
	x_ ./build grub
}

build_dependency_uboot()
{
	[ "${payload_uboot}" = "y" ] || return 0

	x_ ./update trees -b u-boot ${board}
	ubdir="elf/u-boot/${board}/${uboot_config}"
	ubootelf="${ubdir}/u-boot.elf"
	[ ! -f "${ubootelf}" ] && [ -f "${ubdir}/u-boot" ] && \
		ubootelf="${ubdir}/u-boot"
	[ -f "${ubootelf}" ] && return 0
	err "Could not find u-boot build for board, ${board}"
}

build_target()
{
	for x in "normal" "vgarom" "libgfxinit"; do
		initmode="${x}"
		hmode="vesafb"
		[ "${initmode}" = "vgarom" ] || hmode="corebootfb"
		modes="${hmode} txtmode"
		[ -z "${_displaymode}" ] || modes="${_displaymode}"
		for y in ${modes}; do
			displaymode="${y}"
			[ "${initmode}" = "normal" ] && \
			    [ "$displaymode" != "txtmode" ] && continue
			cbcfg="${targetdir}/config/${initmode}_${displaymode}"
			[ "${initmode}" = "normal" ] && cbcfg="${cbcfg%_*}"
			build_roms "${cbcfg}"	
		done
	done
}

# Main ROM building function. This calls all other functions below
build_roms()
{
	cbcfg="${1}"
	[ ! -f "${cbcfg}" ] && \
		printf "'%s' does not exist. Skipping build for %s %s %s\n" \
		    "${cbcfg}" "${board}" "${displaymode}" "${initmode}" \
		    1>&2 && return 0

	x_ ./update trees -b coreboot ${board}

	_cbrom="elf/coreboot_nopayload_DO_NOT_FLASH/${board}/${initmode}_${displaymode}"
	[ "${initmode}" = "normal" ] && \
		_cbrom="${_cbrom%_${displaymode}}"
	_cbrom="${_cbrom}/coreboot.rom"
	cbrom="$(mktemp -t coreboot_rom.XXXXXXXXXX)"
	x_ cp "${_cbrom}" "${cbrom}"

	[ "${payload_memtest}" != "y" ] || \
		x_ "${cbfstool}" "${cbrom}" add-payload \
		    -f "src/${memtest_bin}" -n img/memtest -c lzma
	[ "${payload_seabios}" = "y" ] && \
		build_seabios_roms
	[ "${payload_grub}" != "y" ] || \
		x_ build_grub_roms "${cbrom}" "grub"
	[ "${payload_uboot}" = "y" ] || return 0
	x_ cp "${_cbrom}" "${cbrom}"
	build_uboot_roms
}

build_seabios_roms()
{
	if [ "${payload_seabios_withgrub}" = "y" ]; then
		tmprom=$(mktemp -t coreboot_rom.XXXXXXXXXX)
		x_ cp "${cbrom}" "${tmprom}"
		x_ build_grub_roms "${tmprom}" "seabios_withgrub"
		x_ rm -f "${tmprom}"
	else
		t=$(mkSeabiosRom "${cbrom}" "fallback/payload") || \
		    err "build_seabios_roms: cannot build tmprom"
		newrom="${romdir}/seabios_${board}_${initmode}_${displaymode}"
		[ "${initmode}" = "normal" ] && newrom="${romdir}/seabios" \
			&& newrom="${newrom}_${board}_${initmode}"
		x_ moverom "${t}" "${newrom}.rom"
		x_ rm -f "${t}"
	fi
}

# Make separate ROM images with GRUB payload, for each supported keymap
build_grub_roms()
{
	tmprom="${1}"
	payload1="${2}" # allow values: grub, seabios, seabios_withgrub

	grub_cbfs="fallback/payload"
	[ "${payload1}" = "grub" ] && [ "${payload_grub_withseabios}" = "y" ] \
		&& x_ mv "$(mkSeabiosRom "${tmprom}" "seabios.elf")" "${tmprom}"
	[ "${payload1}" != "grub" ] && [ "${payload_seabios_withgrub}" = "y" ] \
		&& grub_cbfs="img/grub2" && \
		x_ mv "$(mkSeabiosRom "${tmprom}" fallback/payload)" "${tmprom}"

	# we only need insert grub.elf once, for each coreboot config:
	x_ "${cbfstool}" "${tmprom}" add-payload -f "${grubelf}" \
	    -n ${grub_cbfs} -c lzma

	# we only need insert background.png once, for each coreboot config:
	if [ "${displaymode}" = "vesafb" ] || \
	    [ "${displaymode}" = "corebootfb" ]; then
		backgroundfile="config/grub/background/${grub_background}"
		"${cbfstool}" "${tmprom}" add -f ${backgroundfile} \
		    -n background.png -t raw || err "insert background, ${backgroundfile}"
	fi

	tmpcfg=$(mktemp -t coreboot_rom.XXXXXXXXXX)
	printf "set grub_scan_disk=\"%s\"\n" "${grub_scan_disk}" >"${tmpcfg}" \
	    || err "set grub_scandisk, ${grub_scan_disk}, ${tmpcfg}"
	[ "${grub_scan_disk}" = "both" ] || \
	    x_ "${cbfstool}" "${tmprom}" add -f "${tmpcfg}" -n scan.cfg -t raw
	printf "set timeout=%s\n" "${grub_timeout}" > "${tmpcfg}" || \
	    err "set timeout, ${grub_timeout}, ${tmpcfg}"
	[ -z "${grub_timeout}" ] || x_ "${cbfstool}" "${tmprom}" add \
	    -f "${tmpcfg}" -n timeout.cfg -t raw
	x_ rm -f "${tmpcfg}"

	keymaps=""
	for kmapfile in "${kmapdir}"/*; do
		keymaps="${keymaps} ${kmapfile}"
	done
	[ -z "${_keyboard}" ] || keymaps="${kmapdir}/${_keyboard}.gkb"

	for keymapfile in ${keymaps}; do
		[ -f "${keymapfile}" ] || continue
		keymap="${keymapfile##*/}"
		keymap="${keymap%.gkb}"
		tmpgrubrom="$(mkGrubRom "${keymap}" "${tmprom}")"

		newrom="${romdir}/${payload1}_${board}_${initmode}_"
		newrom="${newrom}${displaymode}_${keymap}.rom"
		[ "${initmode}" = "normal" ] && \
			newrom="${romdir}/${payload1}_${board}_" && \
			newrom="${newrom}${initmode}_${keymap}.rom"
		x_ moverom "${tmpgrubrom}" "${newrom}"
		[ "${payload_seabios_grubonly}" = "y" ] && \
			mkSeabiosGrubonlyRom "${tmpgrubrom}" "${newrom}"
		x_ rm -f "${tmpgrubrom}"
	done
}

# make a rom in /tmp/ and then print the path of that ROM
mkGrubRom() {
	_keymap="${1}"
	_cbrom="${2}"

	keymapcfg="elf/grub/keymap_${_keymap}.cfg"

	tmprom=$(mktemp -t coreboot_rom.XXXXXXXXXX)
	x_ cp "${_cbrom}" "${tmprom}"
	x_ "${cbfstool}" "${tmprom}" add -f "${keymapcfg}" -n keymap.cfg -t raw

	printf "%s\n" "${tmprom}"
}

# make a rom in /tmp/ and then print the path of that ROM
mkSeabiosRom() {
	_cbrom="${1}" # rom to insert seabios in. will not be touched
		# (a tmpfile will be made instead)
	_seabios_cbfs_path="${2}" # e.g. fallback/payload
	_seabioself="elf/seabios/default/${initmode}/bios.bin.elf"
	tmprom=$(mktemp -t coreboot_rom.XXXXXXXXXX)

	x_ cp "${_cbrom}" "${tmprom}"
	x_ "${cbfstool}" "${tmprom}" add-payload -f "${_seabioself}" \
	    -n ${_seabios_cbfs_path} -c lzma
	x_ "${cbfstool}" "${tmprom}" add-int -i 3000 -n etc/ps2-keyboard-spinup

	z="2"; [ "${initmode}" = "vgarom" ] && z="0"
	x_ "${cbfstool}" "${tmprom}" add-int -i $z -n etc/pci-optionrom-exec
	x_ "${cbfstool}" "${tmprom}" add-int -i 0 -n etc/optionroms-checksum
	[ "${initmode}" != "libgfxinit" ] || \
		x_ "${cbfstool}" "${tmprom}" add -f "${seavgabiosrom}" \
		    -n vgaroms/seavgabios.bin -t raw

	printf "%s\n" "${tmprom}"
}

# SeaGRUB configuration
mkSeabiosGrubonlyRom()
{
	_grubrom="${1}"
	_newrom="${2}"

	tmpbootorder=$(mktemp -t coreboot_rom.XXXXXXXXXX)

	# only load grub, by inserting a custom bootorder file
	printf "/rom@img/grub2\n" > "${tmpbootorder}" || err "printf bootorder"
	x_ "${cbfstool}" "${_grubrom}" \
	    add -f "${tmpbootorder}" -n bootorder -t raw
	x_ rm -f "${tmpbootorder}"

	x_ "${cbfstool}" "${_grubrom}" add-int -i 0 -n etc/show-boot-menu

	x_ moverom "${_grubrom}" "${_newrom%.rom}_grubonly.rom"
}

build_uboot_roms()
{
	tmprom="$(mkUbootRom "${cbrom}" "fallback/payload")"
	newrom="${romdir}/uboot_payload_${board}_${initmode}_${displaymode}.rom"
	[ "${initmode}" = "normal" ] && \
		newrom="${romdir}/uboot_payload_${board}_${initmode}.rom"
	x_ moverom "${tmprom}" "${newrom}"
	x_ rm -f "${tmprom}"
}

# make a rom in /tmp/ and then print the path of that ROM
mkUbootRom() {
	_cbrom="${1}"
	_uboot_cbfs_path="${2}"

	_ubdir="elf/u-boot/${board}/${uboot_config}"
	_ubootelf="${_ubdir}/u-boot.elf"
	[ -f "${_ubootelf}" ] || _ubootelf="${_ubdir}/u-boot"
	[ -f "${_ubootelf}" ] || err "mkUbootRom: ${board}: cant find u-boot"

	tmprom=$(mktemp -t coreboot_rom.XXXXXXXXXX)

	x_ cp "${_cbrom}" "${tmprom}"
	x_ "${cbfstool}" "${tmprom}" add-payload -f "${_ubootelf}" \
	    -n ${_uboot_cbfs_path} -c lzma

	printf "%s\n" "${tmprom}"
}

# it is assumed that no other work will be done on the ROM
# after calling this function. therefore this function is "final"
moverom() {
	rompath="${1}"
	newrom="${2}"

	printf "Creating target image: %s\n" "${newrom}"

	[ -d "${newrom%/*}" ] || x_ mkdir -p "${newrom%/*}/"

	x_ modify_coreboot_rom
	x_ cp "${rompath}" "${newrom}"
}

modify_coreboot_rom()
{
	tmpmvrom="$(mktemp -t rom.XXXXXXXXXX)"
	x_ rm -f "${tmpmvrom}"

	if [ "${romtype}" = "d8d16sas" ]; then
		# pike2008 roms hang seabios. an empty rom will override
		# the built-in one, thus disabling all execution of it
		x_ touch "${tmpmvrom}"
		for deviceID in "0072" "3050"; do
			x_ "${cbfstool}" "${rompath}" add -f "${tmpmvrom}" \
			    -n "pci1000,${deviceID}.rom" -t raw
		done
	elif [ "${romtype}" = "i945 laptop" ]; then
		# for bucts-based installation method from factory bios
               dd if="${rompath}" of="${tmpmvrom}" bs=1 \
                   skip=$(($(stat -c %s "${rompath}") - 0x10000)) \
                   count=64k || err "modrom 1, copy bootblock"
               dd if="${tmpmvrom}" of="${rompath}" bs=1 \
                   seek=$(($(stat -c %s "${rompath}") - 0x20000)) count=64k \
                   conv=notrunc || err "modrom 2, insert new bootblock"
               x_ rm -f "${tmpmvrom}"
	fi
	x_ rm -f "${tmpmvrom}"
}

usage()
{
	cat <<- EOF
	USAGE:	./build roms targetname
	To build *all* boards, do this: ./build roms all
	To list *all* boards, do this: ./build roms list
	
	Optional Flags:
	-d: displaymode
	-p: payload
	-k: keyboard layout

	Example commands:

		./build roms x60
		./build roms x200_8mb x60
		./build roms x60 -p grub -d corebootfb -k usqwerty

	possible values for 'target':
	$(items "config/coreboot")

	Refer to the ${projectname} documentation for more information.
	EOF
}

main $@