vcs: Scope parameter assignments to toplevel module

edalize/tools/vcs.py

@@ -273,7 +273,7 @@ def write_config_files(self):
         s = ""
         for key, value in _parameters.items():
             _value = self._param_value_str(value, '"')
-            s += f"assign {_value} {key}\n"
+            s += f"assign {_value} {self.toplevel}.{key}\n"
         self.update_config_file("parameters.txt", s)
 
     def run(self):

tests/tools/vcs/2stage_basic/parameters.txt

@@ -1,3 +1,3 @@
-assign 1 vlogparam_bool
-assign 42 vlogparam_int
-assign "hello" vlogparam_str
+assign 1 top_module.vlogparam_bool
+assign 42 top_module.vlogparam_int
+assign "hello" top_module.vlogparam_str

tests/tools/vcs/basic/parameters.txt

@@ -1,3 +1,3 @@
-assign 1 vlogparam_bool
-assign 42 vlogparam_int
-assign "hello" vlogparam_str
+assign 1 top_module.vlogparam_bool
+assign 42 top_module.vlogparam_int
+assign "hello" top_module.vlogparam_str