[topgen] Only create alert_handler if there an instance

Signed-off-by: Robert Schilling <[email protected]>

util/topgen.py

@@ -797,11 +797,12 @@ def _process_top(
     # generating the Alert Handler
     create_alert_lpgs(topcfg, name_to_block)
 
-    # Generate Alert Handler
+    # Generate Alert Handler if there is an instance
     if not args.xbar_only:
-        generate_alert_handler(completecfg, out_path)
-        if args.alert_handler_only:
-            sys.exit()
+        if lib.find_module(completecfg['module'], 'alert_handler'):
+            generate_alert_handler(completecfg, out_path)
+            if args.alert_handler_only:
+                sys.exit()
 
     # Generate Pinmux
     if lib.find_module(completecfg['module'], 'pinmux'):

util/topgen/lib.py

@@ -863,7 +863,10 @@ def __init__(self, top_info, name_to_block: Dict[str, IpBlock], enum_type, array
 
         self._init_plic_targets()
         self._init_plic_mapping()
-        self._init_alert_mapping()
+
+        # Only generate alert_handler and mappings if there is an alert_handler
+        if find_module(self.top['module'], 'alert_handler'):
+            self._init_alert_mapping()
         # Only generate pinmux and pad mappings if there is a pinmux
         if find_module(self.top['module'], 'pinmux'):
             self._init_pinmux_mapping()