forked from dan/liminix
uimage: make fit optional
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f62ad0e1d7
commit
bd20f3e419
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@ -131,9 +131,11 @@
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SERIAL_OF_PLATFORM="y";
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};
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};
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boot.commandLine = [
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"console=ttyS0,115200"
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];
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boot = {
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commandLine = [ "console=ttyS0,115200" ];
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tftp.loadAddress = "0x4007ff28";
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imageFormat = "fit";
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};
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filesystem =
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let inherit (pkgs.pseudofile) dir symlink;
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in
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@ -47,6 +47,10 @@ in {
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default = [];
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description = "Kernel command line";
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};
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imageFormat = mkOption {
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type = types.enum ["fit" "uimage"];
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default = "uimage";
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};
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tftp = {
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loadAddress = mkOption {
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type = types.str;
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@ -78,6 +78,7 @@ in
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uimage = liminix.builders.uimage {
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commandLine = concatStringsSep " " config.boot.commandLine;
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inherit (config.hardware) loadAddress entryPoint;
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inherit (config.boot) imageFormat;
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inherit kernel;
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inherit dtb;
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};
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@ -7,21 +7,27 @@
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} :
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let
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objcopy = "${stdenv.cc.bintools.targetPrefix}objcopy";
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arch = stdenv.hostPlatform.linuxArch;
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stripAndZip = ''
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${objcopy} -O binary -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id -S vmlinux.elf vmlinux.bin
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rm -f vmlinux.bin.lzma ; lzma -k -z vmlinux.bin
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'';
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in {
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kernel
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, commandLine
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, entryPoint
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, extraName ? "" # e.g. socFamily
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, loadAddress
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, imageFormat
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, dtb ? null
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} :
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stdenv.mkDerivation {
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} : stdenv.mkDerivation {
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name = "kernel.image";
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phases = [
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"preparePhase"
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(if dtb != null then "dtbPhase" else ":")
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"buildPhase"
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"installPhase" ];
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(if commandLine != null then assert dtb != null; "mungeDtbPhase" else ":")
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(if imageFormat == "fit" then "buildPhaseFIT" else "buildPhaseUImage")
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"installPhase"
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];
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nativeBuildInputs = [
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lzma
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dtc
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@ -31,35 +37,39 @@ stdenv.mkDerivation {
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preparePhase = ''
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cp ${kernel} vmlinux.elf; chmod +w vmlinux.elf
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'';
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dtbPhase = ''
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mungeDtbPhase = ''
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dtc -I dtb -O dts -o tmp.dts ${dtb}
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echo '/{ chosen { bootargs = ${builtins.toJSON commandLine}; }; };' >> tmp.dts
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dtc -I dts -O dtb -o tmp.dtb tmp.dts
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'';
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buildPhase =
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let arch =
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# per output of "mkimage -A list". I *think* these
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# are the same as the kernel arch convention, but
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# maybe that's coincidence
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if stdenv.isMips
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then "mips"
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else if stdenv.isAarch64
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then "arm64"
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else throw "unknown arch";
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in ''
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${objcopy} -O binary -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id -S vmlinux.elf vmlinux.bin
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rm -f vmlinux.bin.lzma ; lzma -k -z vmlinux.bin
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cat ${./kernel_fdt.its} > mkimage.its
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echo '/ { images { kernel { data = /incbin/("./vmlinux.bin.lzma"); }; }; };' >> mkimage.its
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echo '/ { images { kernel { load = <${loadAddress}>; }; }; };' >> mkimage.its
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echo '/ { images { kernel { entry = <${entryPoint}>; }; }; };' >> mkimage.its
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echo '/ { images { kernel { compression = "lzma"; }; }; };' >> mkimage.its
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echo '/ { images { fdt-1 { data = /incbin/("./tmp.dtb"); }; }; }; ' >> mkimage.its
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mkimage -f mkimage.its mkimage.itb
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mkimage -l mkimage.itb
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'';
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buildPhaseUImage = ''
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test -f tmp.dtb && ${objcopy} --update-section .appended_dtb=tmp.dtb vmlinux.elf || ${objcopy} --add-section .appended_dtb=tmp.dtb vmlinux.elf
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${stripAndZip}
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mkimage -A ${arch} -O linux -T kernel -C lzma -a ${loadAddress} -e ${entryPoint} -n '${lib.toUpper arch} Liminix Linux ${extraName}' -d vmlinux.bin.lzma kernel.uimage
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'';
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buildPhaseFIT = ''
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${stripAndZip}
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cat ${./kernel_fdt.its} > mkimage.its
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cat << _VARS >> mkimage.its
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/ {
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images {
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kernel {
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data = /incbin/("./vmlinux.bin.lzma");
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load = <${loadAddress}>;
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entry = <${entryPoint}>;
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compression = "lzma";
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};
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fdt-1 { data = /incbin/("./tmp.dtb"); };
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};
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};
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_VARS
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mkimage -f mkimage.its kernel.uimage
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mkimage -l kernel.uimage
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'';
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installPhase = ''
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cp mkimage.itb $out
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cp kernel.uimage $out
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'';
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}
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