u-boot/arch/x86/include/asm/acpi/pci_osc.asl
Simon Glass d9434a17e5 x86: acpi: Add base asl files for common x86 devices
Add common x86 ASL files, taken from coreboot.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
2020-09-25 11:27:11 +08:00

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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2016 Intel Corp.
*/
#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)
}
}
}