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-rw-r--r--src/southbridge/amd/cimx/sb800/acpi/fch.asl11
1 files changed, 10 insertions, 1 deletions
diff --git a/src/southbridge/amd/cimx/sb800/acpi/fch.asl b/src/southbridge/amd/cimx/sb800/acpi/fch.asl
index 960cc15664..1e9ca640ca 100644
--- a/src/southbridge/amd/cimx/sb800/acpi/fch.asl
+++ b/src/southbridge/amd/cimx/sb800/acpi/fch.asl
@@ -22,11 +22,20 @@
/* Operating System Capabilities Method */
Method(_OSC,4)
-{ /* Check for proper PCI/PCIe UUID */
+{
+ // Create DWord-addressable fields from the Capabilities Buffer
+ CreateDWordField(Arg3,0,CDW1)
+ CreateDWordField(Arg3,4,CDW2)
+ CreateDWordField(Arg3,8,CDW3)
+
+ /* Check for proper PCI/PCIe UUID */
If(LEqual(Arg0,ToUUID("33DB4D5B-1FF7-401C-9657-7441C03DD766")))
{
/* Let OS control everything */
Return (Arg3)
+ } Else {
+ Or(CDW1,4,CDW1) // Unrecognized UUID
+ Return(Arg3)
}
}