Fix PCI ACPI _OSC methods
Fix the IASL build warnings:
Object is not referenced (Name [CDW2] is within a method [_OSC])
Object is not referenced (Name [CDW3] is within a method [_OSC])
Remove the not referenced objects. They are not needed.
BUG=b:112476331
TEST=IASL doesn't give the warning.
Change-Id: I5b38d4de3f9875c5b013a49eb5146bf5916b96a6
Signed-off-by: Marc Jones <marcj303@gmail.com>
Reviewed-on: https://review.coreboot.org/28121
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/northbridge/intel/i945/acpi/i945.asl b/src/northbridge/intel/i945/acpi/i945.asl
index 5a93238..79fb371 100644
--- a/src/northbridge/intel/i945/acpi/i945.asl
+++ b/src/northbridge/intel/i945/acpi/i945.asl
@@ -20,17 +20,13 @@
/* Operating System Capabilities Method */
Method (_OSC, 4)
{
- // 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 {
+ CreateDWordField(Arg3, 0, CDW1)
Or(CDW1, 4, CDW1) // Unrecognized UUID, so set bit 2 to 1
Return(Arg3)
}