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WIP: create a FIT image for TFTP booting

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TODO: make 'traditional' and FIT methods work side-by-side
This commit is contained in:
Arnout Engelen 2025-01-02 09:46:34 +01:00
parent 2e513eb4a7
commit a3f6234ef0
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GPG Key ID: 061107B0F74A6DAA
1 changed files with 27 additions and 18 deletions
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45
modules/outputs/tftpboot.nix
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@ -73,6 +73,7 @@ in {
cmdline = concatStringsSep " " config.boot.commandLine; cmdline = concatStringsSep " " config.boot.commandLine;
objcopy = "${pkgs.stdenv.cc.bintools.targetPrefix}objcopy"; objcopy = "${pkgs.stdenv.cc.bintools.targetPrefix}objcopy";
stripAndZip = '' stripAndZip = ''
cp vmlinux vmlinux.elf; chmod +w vmlinux.elf
${objcopy} -O binary -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id -S vmlinux.elf vmlinux.bin ${objcopy} -O binary -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id -S vmlinux.elf vmlinux.bin
rm -f vmlinux.bin.lzma ; lzma -k -z vmlinux.bin rm -f vmlinux.bin.lzma ; lzma -k -z vmlinux.bin
''; '';
@ -96,7 +97,7 @@ in {
# decompression code will assume that any memory after the # decompression code will assume that any memory after the
# end of the kernel is free # end of the kernel is free
dtbStart=$(($rootfsStart + $rootfsSize)) imageStart=$(($rootfsStart + $rootfsSize))
${if cfg.compressRoot ${if cfg.compressRoot
then '' then ''
lzma -z9cv ${o.rootfs} > rootfs.lz lzma -z9cv ${o.rootfs} > rootfs.lz
@ -127,22 +128,30 @@ in {
dtbSize=$(binsize ./dtb ) dtbSize=$(binsize ./dtb )
${if cfg.appendDTB then '' ${stripAndZip}
imageStart=$dtbStart cat ${../../pkgs/kernel/kernel_fdt.its} > mkimage.its
# re-package image with updated dtb cat << _VARS >> mkimage.its
cat ${o.kernel} > vmlinux.elf / {
${objcopy} --update-section .appended_dtb=dtb vmlinux.elf images {
${stripAndZip} kernel {
mkimage -A ${arch} -O linux -T kernel -C lzma -a $(hex ${toString hw.loadAddress}) -e $(hex ${toString hw.entryPoint}) -n '${lib.toUpper arch} Liminix Linux tftpboot' -d vmlinux.bin.lzma image description = "${arch} Liminix kernel";
# dtc -I dtb -O dts -o /dev/stdout dtb | grep -A10 chosen ; exit 1 data = /incbin/("./vmlinux.bin.lzma");
tftpcmd="tftpboot $(hex $imageStart) result/image " load = <0x${lib.toHexString hw.loadAddress}>;
bootcmd="bootm $(hex $imageStart)" entry = <0x${lib.toHexString hw.entryPoint}>;
'' else '' arch = "${arch}";
imageStart=$(($dtbStart + $dtbSize)) compression = "lzma";
tftpcmd="tftpboot $(hex $imageStart) result/image; tftpboot $(hex $dtbStart) result/dtb " };
ln -s ${image} image fdt-1 {
bootcmd="${bootCommand} $(hex $imageStart) - $(hex $dtbStart)" description = "${arch} Liminix DTB";
''} data = /incbin/("./dtb");
arch = "${arch}";
};
};
};
_VARS
mkimage -f mkimage.its image
tftpcmd="tftpboot $(hex $imageStart) result/image "
bootcmd="bootm $(hex $imageStart)"
cat > boot.scr << EOF cat > boot.scr << EOF
setenv serverip ${cfg.serverip} setenv serverip ${cfg.serverip}
@ -156,7 +165,7 @@ in {
then "lzmadec $(hex $rootfsLzStart) $(hex $rootfsStart); " then "lzmadec $(hex $rootfsLzStart) $(hex $rootfsStart); "
else "" else ""
} $bootcmd } $bootcmd
EOF EOF
''; '';
}; };