| /* |
| * 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 */ |
| } |
| } |
