mirror of https://gitee.com/openkylin/qemu.git
105 lines
3.6 KiB
Plaintext
105 lines
3.6 KiB
Plaintext
/*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/****************************************************************
|
|
* CPU hotplug
|
|
****************************************************************/
|
|
#define CPU_HOTPLUG_RESOURCE_DEVICE PRES
|
|
|
|
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)
|
|
}
|
|
|
|
#define CPU_STATUS_LEN ACPI_GPE_PROC_LEN
|
|
OperationRegion(PRST, SystemIO, CPU_STATUS_BASE, CPU_STATUS_LEN)
|
|
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)
|
|
}
|
|
}
|
|
|
|
Device(CPU_HOTPLUG_RESOURCE_DEVICE) {
|
|
Name(_HID, EisaId("PNP0A06"))
|
|
|
|
Name(_CRS, ResourceTemplate() {
|
|
IO(Decode16, CPU_STATUS_BASE, CPU_STATUS_BASE, 0, CPU_STATUS_LEN)
|
|
})
|
|
|
|
Name(_STA, 0xB) /* present, functioning, decoding, not shown in UI */
|
|
}
|
|
}
|