blob: 0f3e83b14d9e790446a18201aa051fdf5e0af96c [file] [log] [blame]
Gerd Hoffmann3aab6ff2012-11-28 10:17:44 +01001/****************************************************************
2 * CPU hotplug
3 ****************************************************************/
4
Kevin O'Connore9e7ab42012-12-02 01:09:17 -05005Scope(\_SB) {
6 /* Objects filled in by run-time generated SSDT */
7 External(NTFY, MethodObj)
8 External(CPON, PkgObj)
Gerd Hoffmann3aab6ff2012-11-28 10:17:44 +01009
Kevin O'Connore9e7ab42012-12-02 01:09:17 -050010 /* Methods called by run-time generated SSDT Processor objects */
11 Method(CPMA, 1, NotSerialized) {
12 // _MAT method - create an madt apic buffer
13 // Arg0 = Processor ID = Local APIC ID
14 // Local0 = CPON flag for this cpu
15 Store(DerefOf(Index(CPON, Arg0)), Local0)
16 // Local1 = Buffer (in madt apic form) to return
17 Store(Buffer(8) {0x00, 0x08, 0x00, 0x00, 0x00, 0, 0, 0}, Local1)
18 // Update the processor id, lapic id, and enable/disable status
19 Store(Arg0, Index(Local1, 2))
20 Store(Arg0, Index(Local1, 3))
21 Store(Local0, Index(Local1, 4))
22 Return (Local1)
23 }
24 Method(CPST, 1, NotSerialized) {
25 // _STA method - return ON status of cpu
26 // Arg0 = Processor ID = Local APIC ID
27 // Local0 = CPON flag for this cpu
28 Store(DerefOf(Index(CPON, Arg0)), Local0)
29 If (Local0) {
30 Return (0xF)
31 } Else {
32 Return (0x0)
Gerd Hoffmann3aab6ff2012-11-28 10:17:44 +010033 }
34 }
Kevin O'Connore9e7ab42012-12-02 01:09:17 -050035 Method(CPEJ, 2, NotSerialized) {
36 // _EJ0 method - eject callback
37 Sleep(200)
38 }
Gerd Hoffmann3aab6ff2012-11-28 10:17:44 +010039
Kevin O'Connore9e7ab42012-12-02 01:09:17 -050040 /* CPU hotplug notify method */
41 OperationRegion(PRST, SystemIO, 0xaf00, 32)
42 Field(PRST, ByteAcc, NoLock, Preserve) {
43 PRS, 256
44 }
45 Method(PRSC, 0) {
46 // Local5 = active cpu bitmap
47 Store(PRS, Local5)
48 // Local2 = last read byte from bitmap
49 Store(Zero, Local2)
50 // Local0 = Processor ID / APIC ID iterator
51 Store(Zero, Local0)
52 While (LLess(Local0, SizeOf(CPON))) {
53 // Local1 = CPON flag for this cpu
54 Store(DerefOf(Index(CPON, Local0)), Local1)
55 If (And(Local0, 0x07)) {
56 // Shift down previously read bitmap byte
57 ShiftRight(Local2, 1, Local2)
58 } Else {
59 // Read next byte from cpu bitmap
60 Store(DerefOf(Index(Local5, ShiftRight(Local0, 3))), Local2)
61 }
62 // Local3 = active state for this cpu
63 Store(And(Local2, 1), Local3)
Gerd Hoffmann3aab6ff2012-11-28 10:17:44 +010064
Kevin O'Connore9e7ab42012-12-02 01:09:17 -050065 If (LNotEqual(Local1, Local3)) {
66 // State change - update CPON with new state
67 Store(Local3, Index(CPON, Local0))
68 // Do CPU notify
69 If (LEqual(Local3, 1)) {
70 NTFY(Local0, 1)
71 } Else {
72 NTFY(Local0, 3)
73 }
74 }
75 Increment(Local0)
76 }
77 }
78}