nix-servo/flake.nix

{
  description = "Not-OS port to the Zynq-7000 platform";
  
  inputs.nixpkgs.url = github:NixOS/nixpkgs/nixos-unstable;
  inputs.not-os.url = github:cleverca22/not-os;
  inputs.zynq-rs.url = git+https://git.m-labs.hk/m-labs/zynq-rs;
  
  outputs = { self, nixpkgs, not-os, zynq-rs }:
    let
      pkgs = import nixpkgs { system = "x86_64-linux"; };
      zynqpkgs = zynq-rs.packages.x86_64-linux;

      build = { target ? "zc706" }: let 
        fsbl = zynqpkgs."${target}-fsbl";

        u-boot = pkgs.pkgsCross.armv7l-hf-multiplatform.buildUBoot {   
          defconfig = "xilinx_zynq_virt_defconfig";
          preConfigure = ''
            export DEVICE_TREE=zynq-zc706
          '';
          extraMeta.platforms = ["armv7l-linux"];
          filesToInstall = ["u-boot.elf"];
        };

        fsbl-sd = pkgs.runCommand "${target}-fsbl-sd"
          {
            buildInputs = [ zynqpkgs.mkbootimage ];
          }
          ''
            bifdir=`mktemp -d`
            cd $bifdir
            ln -s ${fsbl}/fsbl.elf fsbl.elf
            ln -s ${u-boot}/u-boot.elf u-boot.elf
            cat > boot.bif << EOF
            the_ROM_image:
            {
              [bootloader]fsbl.elf
              u-boot.elf
            }
            EOF
            mkdir $out $out/nix-support
            mkbootimage boot.bif $out/boot.bin
            echo file binary-dist $out/boot.bin >> $out/nix-support/hydra-build-products
          '';
        in {
          "${target}-fsbl-sd" = fsbl-sd;
        };

      in rec {
      packages.x86_64-linux = {
        zc706-fsbl = zynqpkgs.zc706-fsbl;
      } // (build { target = "zc706"; });
      
      packages.armv7l-linux = let
        platforms = (import not-os.inputs.nixpkgs { config = {}; }).platforms;
        eval = (import "${not-os}" {
          extraModules = [
            ./zynq_image.nix
          ];
          platform = system: platforms.armv7l-hf-multiplatform;
          system = "x86_64-linux";
          crossSystem.system = "armv7l-linux";
          inherit (not-os.inputs) nixpkgs;
        });
      in {
        zynq_image = eval.config.system.build.zynq_image;
      };
    };
}