1 files changed, 62 insertions, 0 deletions
diff --git a/drivers/staging/unisys/visorchipset/controlvm_direct.c b/drivers/staging/unisys/visorchipset/controlvm_direct.c
new file mode 100644
index 000000000000..b911ea85c093
--- /dev/null
+++ b/drivers/staging/unisys/visorchipset/controlvm_direct.c
@@ -0,0 +1,62 @@
+/* controlvm_direct.c
+ *
+ * Copyright © 2010 - 2013 UNISYS CORPORATION
+ * All rights reserved.
+ *
+ * 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; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * 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, GOOD TITLE or
+ * NON INFRINGEMENT.  See the GNU General Public License for more
+ * details.
+ */
+
+/* This is a controlvm-related code that is dependent upon firmware running
+ * on a virtual partition.
+ */
+
+#include "globals.h"
+#include "uisutils.h"
+#include "controlvm.h"
+#define CURRENT_FILE_PC VISOR_CHIPSET_PC_controlvm_direct_c
+
+
+/* We can fill in this code when we learn how to make vmcalls... */
+
+
+
+int controlvm_init(void)
+{
+	return 0;
+}
+
+
+
+void controlvm_deinit(void)
+{
+}
+
+
+
+HOSTADDRESS controlvm_get_channel_address(void)
+{
+	static BOOL warned = FALSE;
+	U64 addr = 0;
+
+	U32 size = 0;
+
+	if (!VMCALL_SUCCESSFUL(Issue_VMCALL_IO_CONTROLVM_ADDR(&addr, &size))) {
+		if (!warned) {
+			ERRDRV("%s - vmcall to determine controlvm channel addr failed",
+			       __func__);
+			warned = TRUE;
+		}
+		return 0;
+	}
+	INFODRV("controlvm addr=%Lx", addr);
+	return addr;
+}