liminix-fork/modules/flashimage.nix
Daniel Barlow 0687ae7f5c rename flashable->flashimage, o.squashfs to rootfs
"rootfs" describes what it is for, "squashfs" merely says
how it's implemented

(also, rootfs-as-jffs2 will soon be added)
2023-04-10 18:13:27 +01:00

63 lines
1.6 KiB
Nix

{
config
, pkgs
, lib
, ...
}:
let
inherit (lib) mkOption types concatStringsSep;
inherit (config.boot) tftp;
in {
options = {
};
config = {
kernel = {
config = {
MTD_SPLIT_UIMAGE_FW = "y";
};
};
programs.busybox.applets = [
"flashcp"
];
outputs.firmware =
let o = config.outputs; in
pkgs.runCommand "firmware" {} ''
dd if=${o.uimage} of=$out bs=128k conv=sync
dd if=${o.rootfs} of=$out bs=128k conv=sync,nocreat,notrunc oflag=append
'';
outputs.flashimage =
let o = config.outputs; in
pkgs.runCommand "flashimage" {} ''
mkdir $out
cd $out
ln -s ${o.firmware} firmware.bin
ln -s ${o.rootfs} rootfs
ln -s ${o.kernel} vmlinux
ln -s ${o.manifest} manifest
ln -s ${o.kernel.headers} build
ln -s ${o.uimage} uimage
ln -s ${o.dtb} dtb
ln -s ${o.flash-scr} flash.scr
'';
outputs.flash-scr =
let
inherit (pkgs.lib.trivial) toHexString;
inherit (config.hardware) flash;
in
pkgs.buildPackages.runCommand "" {} ''
imageSize=$(stat -L -c %s ${config.outputs.firmware})
cat > $out << EOF
setenv serverip ${tftp.serverip}
setenv ipaddr ${tftp.ipaddr}
tftp 0x$(printf %x ${tftp.loadAddress}) result/firmware.bin
erase 0x$(printf %x ${flash.address}) +\''${filesize})
cp.b 0x$(printf %x ${tftp.loadAddress}) 0x$(printf %x ${flash.address}) \''${filesize}
echo command line was ${builtins.toJSON (concatStringsSep " " config.boot.commandLine)}
EOF
'';
};
}