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-rw-r--r--src/soc/intel/common/acpi/pci_osc.asl31
1 files changed, 31 insertions, 0 deletions
diff --git a/src/soc/intel/common/acpi/pci_osc.asl b/src/soc/intel/common/acpi/pci_osc.asl
new file mode 100644
index 0000000000..4179e94ae7
--- /dev/null
+++ b/src/soc/intel/common/acpi/pci_osc.asl
@@ -0,0 +1,31 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Intel Corp.
+ *
+ * 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.
+ */
+
+#define PCI_OSC_UUID "33DB4D5B-1FF7-401C-9657-7441C03DD766"
+
+Scope (\_SB.PCI0) {
+ Method (_OSC, 4) {
+ /* Check for proper GUID */
+ If (LEqual (Arg0, ToUUID (PCI_OSC_UUID))) {
+ /* Let OS control everything */
+ Return (Arg3)
+ } Else {
+ /* Unrecognized UUID */
+ CreateDWordField (Arg3, 0, CDW1)
+ Or (CDW1, 4, CDW1)
+ Return (Arg3)
+ }
+ }
+}