support aarch64 in tftpboot test

tests/tftpboot/test.nix

@@ -1,13 +1,15 @@
 {
   liminix
 }:
+let check = deviceName : ubootName :
 let derivation = (import liminix {
-      device = import "${liminix}/devices/qemu-armv7l/";
+      device = import "${liminix}/devices/${deviceName}/";
       liminix-config = ./configuration.nix;
     });
     img = derivation.outputs.tftpboot;
-    pkgs = derivation.pkgs;
-    pkgsBuild = pkgs.pkgsBuildBuild;
+    uboot = derivation.pkgs.${ubootName};
+    pkgsBuild = derivation.pkgs.pkgsBuildBuild;
+    phram = 240 * 1024 * 1024;
 in pkgsBuild.runCommand "check" {
   nativeBuildInputs = with pkgsBuild; [
     expect
@@ -17,15 +19,19 @@ in pkgsBuild.runCommand "check" {
 } ''
 mkdir vm
 ln -s ${img} result
+
 run-liminix-vm \
  --background ./vm \
- --u-boot ${pkgs.ubootQemuArm}/u-boot.bin \
- --arch arm \
- --flag -S \
- --phram-address 0x40200000 \
+ --u-boot ${uboot}/u-boot.bin \
+ --arch ${derivation.pkgs.stdenv.hostPlatform.qemuArch} \
+ --phram-address $(printf "0x%x" ${toString phram} ) \
  --lan "user,tftp=`pwd`" \
  --disk-image result/rootfs \
  result/uimage result/rootfs
 
 expect ${./script.expect} 2>&1 |tee $out
-''
+'';
+in {
+  arm = check  "qemu-armv7l" "ubootQemuArm";
+  aarch64 = check "qemu-aarch64" "ubootQemuAarch64";
+}