liminix-fork/modules/tftpboot.nix
Daniel Barlow e78d5212e6 move tftp config to base module
we need it for flashing from u-boot even when tftp booting
is not enabled
2023-03-18 14:45:51 +00:00

49 lines
1.6 KiB
Nix

{
config
, pkgs
, lib
, ...
}:
let
inherit (lib) mkOption types concatStringsSep;
cfg = config.boot.tftp;
in {
imports = [ ./ramdisk.nix ];
config = {
boot.ramdisk.enable = true;
kernel.config.MIPS_CMDLINE_FROM_BOOTLOADER = "y";
outputs.tftpboot =
let o = config.outputs; in
pkgs.runCommand "tftpboot" {} ''
mkdir $out
cd $out
ln -s ${o.squashfs} squashfs
ln -s ${o.kernel} vmlinux
ln -s ${o.manifest} manifest
ln -s ${o.kernel.headers} build
ln -s ${o.uimage} uimage
ln -s ${o.boot-scr} boot.scr
'';
outputs.boot-scr =
let
inherit (pkgs.lib.trivial) toHexString;
in
pkgs.buildPackages.runCommand "boot-scr" {} ''
uimageSize=$(($(stat -L -c %s ${config.outputs.uimage}) + 0x1000 &(~0xfff)))
squashfsStart=0x$(printf %x $((${cfg.loadAddress} + 0x100000 + $uimageSize)))
squashfsBytes=$(($(stat -L -c %s ${config.outputs.squashfs}) + 0x100000 &(~0xfffff)))
squashfsMb=$(($squashfsBytes >> 20))
cmd="mtdparts=phram0:''${squashfsMb}M(nix) phram.phram=phram0,''${squashfsStart},''${squashfsMb}Mi memmap=''${squashfsMb}M\$''${squashfsStart} root=1f00";
cat > $out << EOF
setenv serverip ${cfg.serverip}
setenv ipaddr ${cfg.ipaddr}
setenv bootargs '${concatStringsSep " " config.boot.commandLine} $cmd'
tftp 0x$(printf %x ${cfg.loadAddress}) result/uimage ; tftp 0x$(printf %x $squashfsStart) result/squashfs
bootm 0x$(printf %x ${cfg.loadAddress})
EOF
'';
};
}