1d608d13eb
Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
73 lines
2.5 KiB
Plaintext
73 lines
2.5 KiB
Plaintext
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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/****************************************************************
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* CPU hotplug
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****************************************************************/
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Scope(\_SB) {
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/* Objects filled in by run-time generated SSDT */
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External(NTFY, MethodObj)
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External(CPON, PkgObj)
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External(PRS, FieldUnitObj)
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/* Methods called by run-time generated SSDT Processor objects */
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Method(CPST, 1, NotSerialized) {
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// _STA method - return ON status of cpu
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// Arg0 = Processor ID = Local APIC ID
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// Local0 = CPON flag for this cpu
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Store(DerefOf(Index(CPON, Arg0)), Local0)
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If (Local0) {
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Return (0xF)
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} Else {
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Return (0x0)
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}
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}
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Method(PRSC, 0) {
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// Local5 = active cpu bitmap
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Store(PRS, Local5)
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// Local2 = last read byte from bitmap
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Store(Zero, Local2)
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// Local0 = Processor ID / APIC ID iterator
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Store(Zero, Local0)
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While (LLess(Local0, SizeOf(CPON))) {
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// Local1 = CPON flag for this cpu
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Store(DerefOf(Index(CPON, Local0)), Local1)
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If (And(Local0, 0x07)) {
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// Shift down previously read bitmap byte
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ShiftRight(Local2, 1, Local2)
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} Else {
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// Read next byte from cpu bitmap
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Store(DerefOf(Index(Local5, ShiftRight(Local0, 3))), Local2)
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}
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// Local3 = active state for this cpu
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Store(And(Local2, 1), Local3)
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If (LNotEqual(Local1, Local3)) {
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// State change - update CPON with new state
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Store(Local3, Index(CPON, Local0))
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// Do CPU notify
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If (LEqual(Local3, 1)) {
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NTFY(Local0, 1)
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} Else {
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NTFY(Local0, 3)
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}
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}
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Increment(Local0)
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}
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}
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}
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