soc/intel/common: Add IGD OpRegion support

Add helper function that fills OpRegion structure based on
VBT file content and some reasonable defaults.

Change-Id: I9aa8862878cc016a9a684c844ceab390734f3e84
Signed-off-by: Andrey Petrov <andrey.petrov@intel.com>
Reviewed-on: https://review.coreboot.org/14806
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

1 files changed, 24 insertions, 0 deletions

diff --git a/src/soc/intel/common/opregion.h b/src/soc/intel/common/opregion.h
new file mode 100644
index 0000000000..228aca2d94
--- /dev/null
+++ b/src/soc/intel/common/opregion.h
@@ -0,0 +1,24 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Intel Inc.
+ *
+ * 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.
+ */
+
+#ifndef _COMMON_OPREGION_H_
+#define _COMMON_OPREGION_H_
+
+#include "gma.h"
+
+/* Loads vbt and initializes opregion. Returns non-zero on success */
+int init_igd_opregion(igd_opregion_t *opregion);
+
+#endif /* _COMMON_OPREGION_H_ */