configure arm linux toolchain

flake.nix

@@ -27,6 +27,19 @@
         ];
       };
 
+      crossSystem = {
+        system = "armv7l-linux";
+        linux-kernel = {
+          name = "zynq";
+          baseConfig = "multi_v7_defconfig";
+          target = "uImage";
+          installTarget = "uImage";
+          autoModules = false;
+          DTB = true;
+          makeFlags = [ "LOADADDR=0x8000" ];
+        };
+      };
+
       crosspkgs-overlay = (self: super: {
         pkgsCross = super.pkgsCross // {
           zynq-baremetal = import super.path {
@@ -38,6 +51,10 @@
               gcc.fpu = "vfpv3";
             };
           };
+          zynq-armv7l-linux = import super.path {
+            system = "x86_64-linux";
+            inherit crossSystem;
+          };
         };
       });
 
@@ -132,7 +149,7 @@
           "${patched-not-os}/zynq_image.nix"
         ];
         system = "x86_64-linux";
-        crossSystem.system = "armv7l-linux";
+        inherit crossSystem;
       });
 
       fast-servo-gateware = pkgs.stdenv.mkDerivation rec {
@@ -234,9 +251,7 @@
           dontFixup = true;
         };
 
-        u-boot = let
-          fast-servo-dts = fast-servo/fast-servo.dts;
-          in (pkgs.pkgsCross.armv7l-hf-multiplatform.buildUBoot {
+        u-boot = (pkgs.pkgsCross.zynq-armv7l-linux.buildUBoot {
             defconfig = "xilinx_zynq_virt_defconfig";
             patches = [] ++ pkgs.lib.optional (board == "fast-servo") ./fast-servo/u-boot.patch;
             preConfigure = ''
@@ -259,7 +274,7 @@
             filesToInstall = [ "u-boot.elf" ];
           }).overrideAttrs (oldAttrs: {
             postUnpack = ''
-              cp ${fast-servo-dts} $sourceRoot/arch/arm/dts/zynq-fast-servo.dts
+              cp ${fast-servo/fast-servo.dts} $sourceRoot/arch/arm/dts/zynq-fast-servo.dts
             '';
             postInstall = ''
               mkdir -p $out/dts

not-os-patches/pr-28.patch

@@ -151,10 +151,10 @@ index c61f9d6..fbdf0fd 100644
    };
  }
 diff --git a/zynq_image.nix b/zynq_image.nix
-index 3fa23ab..e2e3871 100644
+index 3fa23ab..9d1621e 100644
 --- a/zynq_image.nix
 +++ b/zynq_image.nix
-@@ -1,66 +1,102 @@
+@@ -1,66 +1,89 @@
 -{ config, pkgs, ... }:
 +{ lib, config, pkgs, ... }:
  
@@ -163,22 +163,7 @@ index 3fa23ab..e2e3871 100644
 -  # dont use overlays for the qemu, it causes a lot of wasted time on recompiles
 -  x86pkgs = import pkgs.path { system = "x86_64-linux"; };
 -  customKernel = pkgs.linux.override {
-+  crosspkgs = import pkgs.path {
-+    system = "x86_64-linux";
-+    crossSystem = {
-+      system = "armv7l-linux";
-+      linux-kernel = {
-+        name = "zynq";
-+        baseConfig = "multi_v7_defconfig";
-+        target = "uImage";
-+        installTarget = "uImage";
-+        autoModules = false;
-+        DTB = true;
-+        makeFlags = [ "LOADADDR=0x8000" ];
-+      };
-+    };
-+  };
-+  customKernel = (crosspkgs.linux.override {
++  customKernel = (pkgs.linux.override {
      extraConfig = ''
        OVERLAY_FS y
 +      MEDIA_SUPPORT n
@@ -195,14 +180,15 @@ index 3fa23ab..e2e3871 100644
 +      OF_OVERLAY y
      '';
 -  };
--  customKernelPackages = pkgs.linuxPackagesFor customKernel;
 +  }).overrideAttrs (oa: {
 +    postInstall = ''
++      if [ -e arch/arm/boot/uImage ]; then
 +        cp arch/arm/boot/uImage $out
++      fi
 +      ${oa.postInstall}
 +    '';
 +  });
-+  customKernelPackages = crosspkgs.linuxPackagesFor customKernel;
+   customKernelPackages = pkgs.linuxPackagesFor customKernel;
  in {
    imports = [ ./arm32-cross-fixes.nix ];
    boot.kernelPackages = customKernelPackages;
@@ -253,12 +239,12 @@ index 3fa23ab..e2e3871 100644
 -    chmod +x qemu-script
 -    patchShebangs qemu-script
 -    ls -ltrh
-   '';
+-  '';
 -  system.build.rpi_image_tar = pkgs.runCommand "dist.tar" {} ''
 -    mkdir -p $out/nix-support
 -    tar -cvf $out/dist.tar ${config.system.build.rpi_image}
 -    echo "file binary-dist $out/dist.tar" >> $out/nix-support/hydra-build-products
--  '';
+   '';
 -  environment.systemPackages = [ pkgs.strace ];
 -  environment.etc."service/getty/run".source = pkgs.writeShellScript "getty" ''
 -    agetty ttyPS0 115200

not-os-patches/pr-33.patch

@@ -1062,13 +1062,13 @@ index 0000000..59aa585
 ++
 + #endif /*_LINUX_FPGA_MGR_H */
 diff --git a/zynq_image.nix b/zynq_image.nix
-index e2e3871..2decd54 100644
+index 9d1621e..012e50c 100644
 --- a/zynq_image.nix
 +++ b/zynq_image.nix
-@@ -18,6 +18,16 @@ let
-     };
-   };
-   customKernel = (crosspkgs.linux.override {
+@@ -3,6 +3,16 @@
+ with lib;
+ let
+   customKernel = (pkgs.linux.override {
 +    kernelPatches = [
 +      ({
 +        name = "xilinx-configfs-overlays";
@@ -1082,7 +1082,7 @@ index e2e3871..2decd54 100644
      extraConfig = ''
        OVERLAY_FS y
        MEDIA_SUPPORT n
-@@ -32,6 +42,7 @@ let
+@@ -17,6 +27,7 @@ let
        OF_FPGA_REGION y
        FPGA_MGR_ZYNQ_FPGA y
        OF_OVERLAY y