Extend the DSDT to include methods for handling memory hot-add and hot-remove notifications and memory device status requests. These functions are called from the memory device SSDT methods. --- src/acpi-dsdt-mem-hotplug.dsl | 57 +++++++++++++++++++++++++++++++++++++++++ src/acpi-dsdt.dsl | 5 +++- 2 files changed, 61 insertions(+), 1 deletions(-) create mode 100644 src/acpi-dsdt-mem-hotplug.dsl
diff --git a/src/acpi-dsdt-mem-hotplug.dsl b/src/acpi-dsdt-mem-hotplug.dsl new file mode 100644 index 0000000..0e7ced3 --- /dev/null +++ b/src/acpi-dsdt-mem-hotplug.dsl @@ -0,0 +1,57 @@ +/**************************************************************** + * Memory hotplug + ****************************************************************/ + +Scope(_SB) { + /* Objects filled in by run-time generated SSDT */ + External(MTFY, MethodObj) + External(MEON, PkgObj) + + Method (CMST, 1, NotSerialized) { + // _STA method - return ON status of memdevice + // Local0 = MEON flag for this cpu + Store(DerefOf(Index(MEON, Arg0)), Local0) + If (Local0) { Return(0xF) } Else { Return(0x0) } + } + + /* Memory hotplug notify array */ + OperationRegion(MEST, SystemIO, 0xaf80, 32) + Field (MEST, ByteAcc, NoLock, Preserve) + { + MES, 256 + } + + Method(MESC, 0) { + // Local5 = active memdevice bitmap + Store (MES, Local5) + // Local2 = last read byte from bitmap + Store (Zero, Local2) + // Local0 = memory device iterator + Store (Zero, Local0) + While (LLess(Local0, SizeOf(MEON))) { + // Local1 = MEON flag for this memory device + Store(DerefOf(Index(MEON, Local0)), Local1) + If (And(Local0, 0x07)) { + // Shift down previously read bitmap byte + ShiftRight(Local2, 1, Local2) + } Else { + // Read next byte from memdevice bitmap + Store(DerefOf(Index(Local5, ShiftRight(Local0, 3))), Local2) + } + // Local3 = active state for this memory device + Store(And(Local2, 1), Local3) + + If (LNotEqual(Local1, Local3)) { + // State change - update MEON with new state + Store(Local3, Index(MEON, Local0)) + // Do MEM notify + If (LEqual(Local3, 1)) { + MTFY(Local0, 1) + } + } + Increment(Local0) + } + Return(One) + } + +} diff --git a/src/acpi-dsdt.dsl b/src/acpi-dsdt.dsl index 158f6b4..98c9413 100644 --- a/src/acpi-dsdt.dsl +++ b/src/acpi-dsdt.dsl @@ -294,6 +294,7 @@ DefinitionBlock ( }
#include "acpi-dsdt-cpu-hotplug.dsl" +#include "acpi-dsdt-mem-hotplug.dsl"
/**************************************************************** @@ -313,7 +314,9 @@ DefinitionBlock ( // CPU hotplug event _SB.PRSC() } - Method(_L03) { + Method(_E03) { + // Memory hotplug event + _SB.MESC() } Method(_L04) { }