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authorGerd Hoffmann <kraxel@redhat.com>2012-11-28 10:17:44 +0100
committerKevin O'Connor <kevin@koconnor.net>2012-12-01 23:22:21 -0500
commit3aab6ff2b18b6f2c93dc71a0fda4bcc4946c8a17 (patch)
treecd53c034485e9e9726d8e890be08f91362b919d3 /src/acpi-dsdt-cpu-hotplug.dsl
parentaa3defc1862a88db593f63345abec7f076fdb036 (diff)
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acpi: move cpu hotplug to separate file
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'src/acpi-dsdt-cpu-hotplug.dsl')
-rw-r--r--src/acpi-dsdt-cpu-hotplug.dsl77
1 files changed, 77 insertions, 0 deletions
diff --git a/src/acpi-dsdt-cpu-hotplug.dsl b/src/acpi-dsdt-cpu-hotplug.dsl
new file mode 100644
index 0000000..7f3ad3b
--- /dev/null
+++ b/src/acpi-dsdt-cpu-hotplug.dsl
@@ -0,0 +1,77 @@
+/****************************************************************
+ * 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)
+ }
+ }
+ }
+
+