.gitignore

@@ -1 +1,2 @@
-result
+result
+tmp

zynq_image.nix

@@ -0,0 +1,90 @@
+{ config, pkgs, ... }:
+
+# Copy of zynq_image.nix from https://github.com/cleverca22/not-os with added patch
+
+let
+  # dont use overlays for the qemu, it causes a lot of wasted time on recompiles
+  x86pkgs = import pkgs.path { system = "x86_64-linux"; };
+  build = config.system.build;
+  customKernel = pkgs.linux.override {
+    extraConfig = ''
+      OVERLAY_FS y
+      CORESIGHT_LINKS_AND_SINKS m
+      CORESIGHT_SINK_TPIU m
+      CORESIGHT_SOURCE_ETM3X m
+    '';
+  };
+  customKernelPackages = pkgs.linuxPackagesFor customKernel;
+in {
+  boot.kernelPackages = customKernelPackages;
+  nixpkgs.system = "armv7l-linux";
+  system.build.zynq_image = let
+    cmdline = "root=/dev/mmcblk0 console=ttyPS0,115200n8 systemConfig=${builtins.unsafeDiscardStringContext build.toplevel}";
+    qemuScript = ''
+      #!/bin/bash -v
+      export PATH=${x86pkgs.qemu}/bin:$PATH
+      set -x
+      base=$(dirname $0)
+
+      mkdir ./tmp/
+      cp $base/root.squashfs ./tmp/
+      chmod +w ./tmp/root.squashfs
+      truncate -s 64M ./tmp/root.squashfs
+
+      qemu-system-arm \
+        -M xilinx-zynq-a9 \
+        -serial /dev/null \
+        -serial stdio \
+        -display none \
+        -dtb $base/zynq-zc706.dtb \
+        -kernel $base/zImage \
+        -initrd $base/initrd \
+        -drive file=./tmp/root.squashfs,if=sd,format=raw \
+        -append "${cmdline}"
+    '';
+  in pkgs.runCommand "zynq_image" {
+    inherit qemuScript;
+    passAsFile = [ "qemuScript" ];
+    preferLocalBuild = true;
+  } ''
+    mkdir $out
+    cd $out
+    cp  ${build.squashfs} root.squashfs
+    cp  ${build.kernel}/*zImage .
+    cp  ${build.initialRamdisk}/initrd initrd
+    cp  ${build.kernel}/dtbs/zynq-zc706.dtb .
+    ln -sv ${build.toplevel} toplevel
+    cp $qemuScriptPath qemu-script
+    chmod +x qemu-script
+    patchShebangs qemu-script
+    ls -ltrh
+  '';
+  environment.systemPackages = [ pkgs.strace ];
+  environment.etc."service/getty/run".source = pkgs.writeShellScript "getty" ''
+    bash </dev/ttyPS0 >/dev/ttyPS0
+  '';
+  environment.etc."pam.d/other".text = "";
+
+  nixpkgs.overlays = [
+    (self: super: {
+      # armv7l cross-compile fixes
+      libuv = super.libuv.overrideAttrs (old: { doCheck = false;});
+      elfutils = super.elfutils.overrideAttrs (old: { doCheck = false; doInstallCheck = false;});
+      systemd = super.systemd.override { withEfi = false; };
+      procps = super.procps.override { withSystemd = false; };
+      nix = super.nix.override { enableDocumentation = false; };
+
+      # closure size fixes
+      openssh = super.openssh.override { withFIDO = false; withKerberos = false; };
+      util-linux = super.util-linux.override {
+        pamSupport=false;
+        capabilitiesSupport=false;
+        ncursesSupport=false;
+        systemdSupport=false;
+        nlsSupport=false;
+        translateManpages=false; };
+      utillinuxCurses = self.util-linux;
+      utillinuxMinimal = self.util-linux;
+    })
+  ];
+}