| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| /* The APM port can be used for generating software SMIs */ |
| |
| OperationRegion (APMP, SystemIO, 0xb2, 2) |
| Field (APMP, ByteAcc, NoLock, Preserve) |
| { |
| APMC, 8, // APM command |
| APMS, 8 // APM status |
| } |
| |
| #include <arch/x86/acpi/post.asl> |
| |
| Method(GOS, 0) |
| { |
| /* Determine the Operating System and save the value in OSYS. |
| * We have to do this in order to be able to work around |
| * certain windows bugs. |
| * |
| * OSYS value | Operating System |
| * -----------+------------------ |
| * 2000 | Windows 2000 |
| * 2001 | Windows XP(+SP1) |
| * 2002 | Windows XP SP2 |
| * 2006 | Windows Vista |
| * ???? | Windows 7 |
| */ |
| |
| /* Let's assume we're running at least Windows 2000 */ |
| OSYS = 2000 |
| |
| If (CondRefOf(_OSI)) { |
| If (_OSI("Windows 2001")) { |
| OSYS = 2001 |
| } |
| |
| If (_OSI("Windows 2001 SP1")) { |
| OSYS = 2001 |
| } |
| |
| If (_OSI("Windows 2001 SP2")) { |
| OSYS = 2002 |
| } |
| |
| If (_OSI("Windows 2006")) { |
| OSYS = 2006 |
| } |
| } |
| } |
| |
| /* Arg0 is state of HPET hardware enablement. */ |
| Method (HPTS, 1) |
| { |
| /* HPET hardware disabled. */ |
| If (!Arg0) { |
| Return (0x0) |
| } |
| |
| /* Ancient versions of Windows don't want to see the HPET. */ |
| If (OSYS < 2001) { |
| Return (0xb) |
| } |
| |
| Return (0xf) |
| } |