[LICENSE] used addlicense to add licenses to all source files
diff --git a/verilog/rtl/pads.v b/verilog/rtl/pads.v
index 0e914b6..25bc89f 100644
--- a/verilog/rtl/pads.v
+++ b/verilog/rtl/pads.v
@@ -1,3 +1,17 @@
+// Copyright 2020 Efabless Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
// `default_nettype none
`ifndef TOP_ROUTING
`define USER1_ABUTMENT_PINS \
