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/* CPU hotplug */
Scope(\_SB) {
/* Objects filled in by run-time generated SSDT */
External(NTFY, MethodObj)
External(CPON, PkgObj)
/* Methods called by run-time generated SSDT Processor objects */
Method(CPMA, 1, NotSerialized) {
/*
* _MAT method - create an madt apic buffer
* Arg0 = Processor ID = Local APIC ID
* Local0 = CPON flag for this cpu
*/
Store(DerefOf(Index(CPON, Arg0)), Local0)
/* Local1 = Buffer (in madt apic form) to return */
Store(Buffer(8) {0x00, 0x08, 0x00, 0x00, 0x00, 0, 0, 0}, Local1)
/* Update the processor id, lapic id, and enable/disable status */
Store(Arg0, Index(Local1, 2))
Store(Arg0, Index(Local1, 3))
Store(Local0, Index(Local1, 4))
Return (Local1)
}
Method(CPST, 1, NotSerialized) {
/*
* _STA method - return ON status of cpu
* Arg0 = Processor ID = Local APIC ID
* Local0 = CPON flag for this cpu
*/
Store(DerefOf(Index(CPON, Arg0)), Local0)
If (Local0) {
Return (0xf)
} Else {
Return (0x0)
}
}
Method(CPEJ, 2, NotSerialized) {
/* _EJ0 method - eject callback */
Sleep(200)
}
/* CPU hotplug notify method */
OperationRegion(PRST, SystemIO, 0xaf00, 32)
Field(PRST, ByteAcc, NoLock, Preserve) {
PRS, 256
}
Method(PRSC, 0) {
/* Local5 = active cpu bitmap */
Store(PRS, Local5)
/* Local2 = last read byte from bitmap */
Store(Zero, Local2)
/* Local0 = Processor ID / APIC ID iterator */
Store(Zero, Local0)
While (LLess(Local0, SizeOf(CPON))) {
/* Local1 = CPON flag for this cpu */
Store(DerefOf(Index(CPON, Local0)), Local1)
If (And(Local0, 0x07)) {
/* Shift down previously read bitmap byte */
ShiftRight(Local2, 1, Local2)
} Else {
/* Read next byte from cpu bitmap */
Store(DerefOf(Index(Local5, ShiftRight(Local0, 3))), Local2)
}
/* Local3 = active state for this cpu */
Store(And(Local2, 1), Local3)
If (LNotEqual(Local1, Local3)) {
/* State change - update CPON with new state */
Store(Local3, Index(CPON, Local0))
/* Do CPU notify */
If (LEqual(Local3, 1)) {
NTFY(Local0, 1)
} Else {
NTFY(Local0, 3)
}
}
Increment(Local0)
}
}
}
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