liminix

Unnamed repository; edit this file 'description' to name the repository.
Log | Files | Refs | README | LICENSE

uimage.nix (2334B)

      1 {
      2   lzma
      3 , stdenv
      4 , ubootTools
      5 , dtc
      6 , lib
      7 } :
      8 let
      9   objcopy = "${stdenv.cc.bintools.targetPrefix}objcopy";
     10   arch = stdenv.hostPlatform.linuxArch;
     11   stripAndZip = ''
     12     ${objcopy} -O binary -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id -S vmlinux.elf vmlinux.bin
     13     rm -f vmlinux.bin.lzma ; lzma -k -z  vmlinux.bin
     14   '';
     15 in {
     16   kernel
     17 , commandLine
     18 , commandLineDtbNode ? "bootargs"
     19 , entryPoint
     20 , extraName ? ""                # e.g. socFamily
     21 , loadAddress
     22 , imageFormat
     23 , alignment ? null
     24 , dtb ? null
     25 } : stdenv.mkDerivation {
     26   name = "kernel.image";
     27   phases = [
     28     "preparePhase"
     29     (if commandLine != null then assert dtb != null; "mungeDtbPhase" else ":")
     30     (if imageFormat == "fit" then "buildPhaseFIT" else "buildPhaseUImage")
     31     "installPhase"
     32   ];
     33   nativeBuildInputs = [
     34     lzma
     35     dtc
     36     stdenv.cc
     37     ubootTools
     38   ];
     39   preparePhase = ''
     40     cp ${kernel} vmlinux.elf; chmod +w vmlinux.elf
     41   '';
     42   mungeDtbPhase = ''
     43     dtc -I dtb -O dts -o tmp.dts ${dtb}
     44     echo '/{ chosen { ${commandLineDtbNode} = ${builtins.toJSON commandLine}; }; };'  >> tmp.dts
     45     dtc -I dts -O dtb -o tmp.dtb tmp.dts
     46   '';
     47 
     48   buildPhaseUImage = ''
     49     test -f tmp.dtb && ${objcopy} --update-section .appended_dtb=tmp.dtb vmlinux.elf || ${objcopy} --add-section .appended_dtb=tmp.dtb vmlinux.elf
     50     ${stripAndZip}
     51     mkimage -A ${arch} -O linux -T kernel -C lzma -a 0x${lib.toHexString loadAddress} -e 0x${lib.toHexString entryPoint} -n '${lib.toUpper arch} Liminix Linux ${extraName}' -d vmlinux.bin.lzma kernel.uimage
     52   '';
     53 
     54   buildPhaseFIT = ''
     55     ${stripAndZip}
     56     cat ${./kernel_fdt.its} > mkimage.its
     57     cat << _VARS  >> mkimage.its
     58     / {
     59         images {
     60             kernel {
     61                 data = /incbin/("./vmlinux.bin.lzma");
     62                 load = <0x${lib.toHexString loadAddress}>;
     63                 entry = <0x${lib.toHexString entryPoint}>;
     64                 arch = "${arch}";
     65                 compression = "lzma";
     66             };
     67             fdt-1 {
     68                 data = /incbin/("./tmp.dtb");
     69                 arch = "${arch}";
     70             };
     71         };
     72     };
     73     _VARS
     74     mkimage -f mkimage.its ${lib.optionalString (alignment != null) "-B 0x${lib.toHexString alignment}"} kernel.uimage
     75     mkimage -l kernel.uimage
     76   '';
     77 
     78   installPhase = ''
     79     cp kernel.uimage $out
     80   '';
     81 }