diff --git a/common/haswell/hw-gfx-gma-plls-wrpll.ads b/common/haswell/hw-gfx-gma-plls-wrpll.ads
new file mode 100644
index 0000000..48f6850
--- /dev/null
+++ b/common/haswell/hw-gfx-gma-plls-wrpll.ads
@@ -0,0 +1,28 @@
+--
+-- Copyright (C) 2015-2016 secunet Security Networks AG
+--
+-- This program is free software; you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation; version 2 of the License.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+
+private package HW.GFX.GMA.PLLs.WRPLL
+is
+
+   type Value_Array is array (WRPLLs) of Word32;
+   Register_Value : constant Value_Array := Value_Array'
+     (WRPLL0 => 4 * 2 ** 29, WRPLL1 => 5 * 2 ** 29);
+
+   procedure On
+     (PLL            : in     WRPLLs;
+      Target_Clock   : in     Frequency_Type;
+      Success        :    out Boolean);
+
+   procedure Off (PLL : WRPLLs);
+
+end HW.GFX.GMA.PLLs.WRPLL;