With this patch, acpi memory device will driver _PS0 method when notify comes.
by adding following swich to DSDT, you can emulate acpi memory hotplug.
==
Name (L1st,0)
Method(_STA,0,NotSerialized) {
If ( LEqual(L1st,1) ) {
Return (0x0f)
} else {
Return (0x00)
}
}
Method(_PS0, 0, NotSerialized) {
Store(1,L1st)
}
==
_PS0 is evaluated and changes return value of _STA, when notify comes.
Index: linux-2.6.17-rc5-mm2/drivers/acpi/acpi_memhotplug.c
===================================================================
--- linux-2.6.17-rc5-mm2.orig/drivers/acpi/acpi_memhotplug.c 2006-06-07 17:08:14.000000000 +0900
+++ linux-2.6.17-rc5-mm2/drivers/acpi/acpi_memhotplug.c 2006-06-07 17:10:03.000000000 +0900
@@ -322,6 +322,10 @@
struct acpi_memory_device *mem_device;
struct acpi_device *device;
+ /* for emulation, evaluate our switch, _PS0 */
+ if ((event == ACPI_NOTIFY_BUS_CHECK) || (event == ACPI_NOTIFY_DEVICE_CHECK))
+ acpi_evaluate_object(handle, "_PS0", NULL, NULL);
+
switch (event) {
case ACPI_NOTIFY_BUS_CHECK:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
