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/* 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)
}
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