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diff --git a/include/rom.sh b/include/rom.sh
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+# SPDX-License-Identifier: GPL-3.0-or-later
+# Copyright (c) 2014-2016,2020-2021,2023-2025 Leah Rowe <leah@libreboot.org>
+# Copyright (c) 2021-2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
+# Copyright (c) 2022 Caleb La Grange <thonkpeasant@protonmail.com>
+# Copyright (c) 2022-2023 Alper Nebi Yasak <alpernebiyasak@gmail.com>
+# Copyright (c) 2023-2024 Riku Viitanen <riku.viitanen@protonmail.com>
+
+grubdata="config/data/grub"
+
+buildser()
+{
+ [ "$1" = "pico" ] && x_ cmake -DPICO_BOARD="$2" \
+ -DPICO_SDK_PATH="$picosdk" -B "$sersrc/build" "$sersrc" && \
+ x_ cmake --build "$sersrc/build"
+ [ "$1" = "stm32" ] && x_ make -C "$sersrc" libopencm3-just-make \
+ BOARD=$2 && x_ make -C "$sersrc" BOARD=$2
+ x_ mkdir -p "bin/serprog_$1"
+ x_ mv "$serx" "bin/serprog_$1/serprog_$2.${serx##*.}"
+}
+
+copyps1bios()
+{
+ [ "$dry" = ":" ] && return 0; :
+
+ remkdir "bin/playstation"
+ x_ cp src/pcsx-redux/src/mips/openbios/openbios.bin bin/playstation
+
+ printf "MIT License\n\nCopyright (c) 2019-2024 PCSX-Redux authors\n\n" \
+ > bin/playstation/COPYING.txt || err "!pcsx-redux copyright"
+ cat config/snippet/mit >>bin/playstation/COPYING.txt || err "!pcsx MIT"
+}
+
+mkpayload_grub()
+{
+ eval "`setvars "" grub_modules grub_install_modules`"
+ $dry eval "`setcfg "$grubdata/module/$tree"`"
+ $dry x_ rm -f "$srcdir/grub.elf"; $dry \
+ x_ "$srcdir/grub-mkstandalone" --grub-mkimage="$srcdir/grub-mkimage" \
+ -O i386-coreboot -o "$srcdir/grub.elf" -d "${srcdir}/grub-core/" \
+ --fonts= --themes= --locales= --modules="$grub_modules" \
+ --install-modules="$grub_install_modules" \
+ "/boot/grub/grub_default.cfg=${srcdir}/.config" \
+ "/boot/grub/grub.cfg=$grubdata/memdisk.cfg"; :
+}
+
+corebootpremake()
+{
+ [ -n "$mode" ] || [ ! -f "$srcdir/.config" ] || $dry printf \
+ "CONFIG_CCACHE=y\n" >> "$srcdir/.config" || err "$srcdir: !cook"; :
+ fx_ check_coreboot_util printf "cbfstool\nifdtool\n"
+ printf "%s\n" "${version%%-*}" > "$srcdir/.coreboot-version" || \
+ err "!mk $srcdir .coreboot-version"
+ [ -z "$mode" ] && [ "$target" != "$tree" ] && \
+ x_ ./mk download "$target"; :
+}
+
+check_coreboot_util()
+{
+ [ "$badhash" = "y" ] && x_ rm -f "elf/coreboot/$tree/$1"
+ e "elf/coreboot/$tree/$1" f && return 0
+
+ utilelfdir="elf/coreboot/$tree"
+ utilsrcdir="src/coreboot/$tree/util/$1"
+
+ utilmode="" && [ -n "$mode" ] && utilmode="clean"
+ x_ make -C "$utilsrcdir" $utilmode -j$XBMK_THREADS $makeargs
+ [ -n "$mode" ] && x_ rm -Rf "$utilelfdir" && return 0
+ [ -z "$mode" ] || return 0
+ [ -f "$utilelfdir/$1" ] && return 0
+
+ x_ mkdir -p "$utilelfdir"
+ x_ cp "$utilsrcdir/$1" "$utilelfdir"
+ [ "$1" = "cbfstool" ] || return 0
+ x_ cp "$utilsrcdir/rmodtool" "$utilelfdir"
+}
+
+mkcorebootbin()
+{
+ [ "$target" = "$tree" ] && return 0
+
+ tmprom="$xbtmp/coreboot.rom"
+ $dry x_ cp "$srcdir/build/coreboot.rom" "$tmprom"
+
+ initmode="${defconfig##*/}"
+ displaymode="${initmode##*_}"
+ [ "$displaymode" = "$initmode" ] && displaymode="" # "normal" config
+ initmode="${initmode%%_*}"
+ cbfstool="elf/coreboot/$tree/cbfstool"
+
+ [ -z "$payload_uboot" ] || [ "$payload_uboot" = "amd64" ] || \
+ [ "$payload_uboot" = "i386" ] || [ "$payload_uboot" = "arm64" ] \
+ || err "'$target' defines bad u-boot type '$payload_uboot'"
+
+ [ -z "$payload_uboot" ] || [ "$payload_uboot" = "arm64" ] || \
+ payload_seabios="y"
+
+ [ -n "$uboot_config" ] || uboot_config="default"
+ [ "$payload_grub" = "y" ] && payload_seabios="y"
+ [ "$payload_seabios" = "y" ] && [ "$payload_uboot" = "arm64" ] && \
+ $dry err "$target: U-Boot(arm64) and SeaBIOS/GRUB both enabled."
+
+ [ -z "$grub_scan_disk" ] && grub_scan_disk="nvme ahci ata"
+
+ [ -n "$grubtree" ] || grubtree="default"
+ grubelf="elf/grub/$grubtree/payload/grub.elf"
+
+ [ "$payload_memtest" = "y" ] || payload_memtest="n"
+ [ "$(uname -m)" = "x86_64" ] || payload_memtest="n"
+
+ [ "$payload_grubsea" = "y" ] && [ "$initmode" = "normal" ] && \
+ payload_grubsea="n"
+ [ "$payload_grub" = "y" ] || payload_grubsea="n"
+
+ if $dry grep "CONFIG_PAYLOAD_NONE=y" "$defconfig"; then
+ [ "$payload_seabios" = "y" ] && pname="seabios" && \
+ $dry add_seabios
+ [ "$payload_uboot" = "arm64" ] && pname="uboot" && \
+ $dry add_uboot; :
+ else
+ pname="custom"
+ $dry cprom
+ fi; :
+}
+
+add_seabios()
+{
+ [ -z "$payload_uboot" ] || [ "$payload_uboot" = "arm64" ] || \
+ $dry add_uboot
+
+ _seabioself="elf/seabios/default/$initmode/bios.bin.elf"
+ _seaname="fallback/payload" && [ "$payload_grubsea" = "y" ] && \
+ _seaname="seabios.elf"
+
+ cbfs "$tmprom" "$_seabioself" "$_seaname"
+ 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" ] && \
+ cbfs "$tmprom" "$seavgabiosrom" vgaroms/seavgabios.bin raw
+
+ [ "$payload_memtest" = "y" ] && cbfs "$tmprom" \
+ "elf/memtest86plus/memtest.bin" img/memtest
+
+ [ "$payload_grub" = "y" ] && add_grub
+
+ [ "$payload_grubsea" != "y" ] && cprom
+ [ "$payload_uboot" = "amd64" ] && [ "$displaymode" != "txtmode" ] && \
+ [ "$initmode" != "normal" ] && [ "$payload_grubsea" != "y" ] && \
+ pname="seauboot" && cprom "seauboot"
+ [ "$payload_grub" = "y" ] && pname="seagrub" && mkseagrub; :
+}
+
+add_grub()
+{
+ _grubname="img/grub2" && [ "$payload_grubsea" = "y" ] && \
+ _grubname="fallback/payload"
+ cbfs "$tmprom" "$grubelf" "$_grubname"
+ printf "set grub_scan_disk=\"%s\"\n" "$grub_scan_disk" \
+ > "$xbtmp/tmpcfg" || err "$target: !insert scandisk"
+ cbfs "$tmprom" "$xbtmp/tmpcfg" scan.cfg raw
+ [ "$initmode" != "normal" ] && [ "$displaymode" != "txtmode" ] && \
+ cbfs "$tmprom" "$grubdata/background/background1280x800.png" \
+ "background.png" raw; :
+}
+
+mkseagrub()
+{
+ [ "$payload_grubsea" = "y" ] && pname="grub"
+ [ "$payload_grubsea" = "y" ] || \
+ cbfs "$tmprom" "$grubdata/bootorder" bootorder raw
+ fx_ cprom x_ find "$grubdata/keymap" -type f -name "*.gkb"
+}
+
+add_uboot()
+{
+ if [ "$displaymode" = "txtmode" ]; then
+ printf "cb/%s: Cannot use U-Boot in text mode\n" \
+ "$target" 1>&2
+ return 0
+ elif [ "$initmode" = "normal" ]; then
+ printf "cb/%s: Cannot use U-Boot in normal initmode\n" \
+ "$target" 1>&2
+ return 0
+ fi
+
+ # TODO: re-work to allow each coreboot target to say which ub tree
+ # instead of hardcoding as in the current logic below:
+
+ # aarch64 targets:
+ ubcbfsargs=""
+ ubpath="fallback/payload"
+ ubtarget="$target"
+ # override for x86/x86_64 targets:
+ if [ -n "$payload_uboot" ] && [ "$payload_uboot" != "arm64" ]; then
+ ubcbfsargs="-l 0x1110000 -e 0x1110000" # 64-bit and 32-bit
+ # on 64-bit, 0x1120000 is the SPL, and stub before that
+ ubpath="img/u-boot" # 64-bit
+ ubtarget="amd64coreboot"
+ [ "$payload_uboot" = "i386" ] && ubpath="u-boot" # 32-bit
+ [ "$payload_uboot" = "i386" ] && ubtarget="i386coreboot"; :
+ fi
+
+ ubdir="elf/u-boot/$ubtarget/$uboot_config"
+
+ # aarch64 targets:
+ ubootelf="$ubdir/u-boot.elf" && [ ! -f "$ubootelf" ] && \
+ ubootelf="$ubdir/u-boot"
+ # override for x86/x86_64 targets:
+ [ "$payload_uboot" = "i386" ] && ubootelf="$ubdir/u-boot-dtb.bin"
+ [ "$payload_uboot" = "amd64" ] && \
+ ubootelf="$ubdir/u-boot-x86-with-spl.bin" # EFI-compatible
+
+ cbfs "$tmprom" "$ubootelf" "$ubpath" $ubcbfsargs
+ [ "$payload_seabios" = "y" ] || cprom; :
+}
+
+cprom()
+{
+ cpcmd="cp"
+
+ tmpnew=""; newrom="bin/$target/${pname}_${target}_$initmode.rom"
+ [ -n "$displaymode" ] && newrom="${newrom%.rom}_$displaymode.rom"
+ [ $# -gt 0 ] && [ "${1%.gkb}" != "$1" ] && tmpnew="${1##*/}" && \
+ newrom="${newrom%.rom}_${tmpnew%.gkb}.rom"
+
+ irom="$tmprom"
+ [ $# -lt 1 ] || irom="`mktemp`" || err "!mk irom, $(echo "$@")"
+ [ $# -gt 0 ] && x_ cp "$tmprom" "$irom" && cpcmd="mv"
+
+ [ $# -gt 0 ] && [ "${1%.gkb}" != "$1" ] && \
+ cbfs "$irom" "$grubdata/keymap/$tmpnew" keymap.gkb raw
+ [ $# -gt 0 ] && [ "$1" = "seauboot" ] && \
+ cbfs "$irom" "$grubdata/bootorder_uboot" bootorder raw; :
+
+ printf "Creating new %s image: '%s'\n" "$projectname" "$newrom"
+ x_ mkdir -p "bin/$target"
+ x_ $cpcmd "$irom" "$newrom"
+}
+
+cbfs()
+{
+ ccmd="add-payload" && [ $# -gt 3 ] && [ $# -lt 5 ] && ccmd="add"
+ lzma="-c lzma" && [ $# -gt 3 ] && [ $# -lt 5 ] && lzma="-t $4"
+
+ [ $# -gt 4 ] && [ "$5" = "0x1110000" ] && \
+ ccmd="add-flat-binary" && \
+ lzma="-c lzma -l 0x1110000 -e 0x1110000"
+
+ x_ "$cbfstool" "$1" $ccmd -f "$2" -n "$3" $lzma
+}
+
+mkcoreboottar()
+{
+ [ "$target" != "$tree" ] && [ "$XBMK_RELEASE" = "y" ] && \
+ [ "$release" != "n" ] && $dry mkrom_tarball "bin/$target" && \
+ $dry x_ ./mk inject "bin/${relname}_${target}.tar.xz" nuke; :
+}