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tftpboot: add option for kernel image format

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This commit is contained in:
Daniel Barlow 2023-12-22 22:15:54 +00:00
parent 44a0cf364b
commit ff0ef825a6
2 changed files with 32 additions and 12 deletions
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28
modules/outputs/tftpboot.nix
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@ -9,9 +9,15 @@ let
cfg = config.boot.tftp;
in {
imports = [ ../ramdisk.nix ];
options.boot.tftp.freeSpaceBytes = mkOption {
type = types.int;
default = 0;
options.boot.tftp = {
freeSpaceBytes = mkOption {
type = types.int;
default = 0;
};
kernelFormat = mkOption {
type = types.enum [ "zimage" "uimage" ];
default = "uimage";
};
};
options.system.outputs = {
tftpboot = mkOption {
@ -44,6 +50,14 @@ in {
let
inherit (pkgs.lib.trivial) toHexString;
o = config.system.outputs;
image = let choices = {
uimage = o.uimage;
zimage = o.zimage;
}; in choices.${cfg.kernelFormat};
bootCommand = let choices = {
uimage = "bootm";
zimage = "bootz";
}; in choices.${cfg.kernelFormat};
cmdline = concatStringsSep " " config.boot.commandLine;
in
pkgs.runCommand "tftpboot" { nativeBuildInputs = [ pkgs.pkgsBuildBuild.dtc ]; } ''
@ -53,8 +67,8 @@ in {
ln -s ${o.kernel} vmlinux
ln -s ${o.manifest} manifest
ln -s ${o.kernel.headers} build
ln -s ${o.uimage} uimage
uimageSize=$(($(stat -L -c %s ${o.uimage}) + 0x1000 &(~0xfff)))
ln -s ${image} image
uimageSize=$(($(stat -L -c %s ${image}) + 0x1000 &(~0xfff)))
rootfsStart=$(printf %x $((${toString cfg.loadAddress} + 0x100000 + $uimageSize &(~0xfffff) )))
rootfsBytes=$(($(stat -L -c %s ${o.rootfs}) + 0x100000 &(~0xfffff)))
rootfsBytes=$(($rootfsBytes + ${toString cfg.freeSpaceBytes} ))
@ -82,8 +96,8 @@ in {
setenv serverip ${cfg.serverip}
setenv ipaddr ${cfg.ipaddr}
setenv bootargs 'liminix ${cmdline} $cmd'
tftpboot 0x${lib.toHexString cfg.loadAddress} result/uimage ; tftpboot 0x$rootfsStart result/rootfs ; tftpboot 0x$dtbStart result/dtb
bootm 0x${lib.toHexString cfg.loadAddress} - 0x$dtbStart
tftpboot 0x${lib.toHexString cfg.loadAddress} result/image ; tftpboot 0x$rootfsStart result/rootfs ; tftpboot 0x$dtbStart result/dtb
${bootCommand} 0x${lib.toHexString cfg.loadAddress} - 0x$dtbStart
EOF
'';