1 files changed, 67 insertions, 0 deletions
diff --git a/src/drivers/xgi/common/vb_util.c b/src/drivers/xgi/common/vb_util.c
new file mode 100644
index 0000000000..a705696638
--- /dev/null
+++ b/src/drivers/xgi/common/vb_util.c
@@ -0,0 +1,67 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * File taken from the Linux xgifb driver (v3.18.5)
+ * Coreboot-specific includes added at top
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "xgi_coreboot.h"
+
+#include "vgatypes.h"
+#include "vb_util.h"
+
+void xgifb_reg_set(unsigned long port, u8 index, u8 data)
+{
+	outb(index, port);
+	outb(data, port + 1);
+}
+
+u8 xgifb_reg_get(unsigned long port, u8 index)
+{
+	u8 data;
+
+	outb(index, port);
+	data = inb(port + 1);
+	return data;
+}
+
+void xgifb_reg_and_or(unsigned long port, u8 index,
+		unsigned data_and, unsigned data_or)
+{
+	u8 temp;
+
+	temp = xgifb_reg_get(port, index); /* XGINew_Part1Port index 02 */
+	temp = (temp & data_and) | data_or;
+	xgifb_reg_set(port, index, temp);
+}
+
+void xgifb_reg_and(unsigned long port, u8 index, unsigned data_and)
+{
+	u8 temp;
+
+	temp = xgifb_reg_get(port, index); /* XGINew_Part1Port index 02 */
+	temp &= data_and;
+	xgifb_reg_set(port, index, temp);
+}
+
+void xgifb_reg_or(unsigned long port, u8 index, unsigned data_or)
+{
+	u8 temp;
+
+	temp = xgifb_reg_get(port, index); /* XGINew_Part1Port index 02 */
+	temp |= data_or;
+	xgifb_reg_set(port, index, temp);
+}