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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*/
External(MEMORY_SLOT_NOTIFY_METHOD, MethodObj)
Scope(\_SB.PCI0) {
Device(MEMORY_HOTPLUG_DEVICE) {
Name(_HID, "PNP0A06")
Name(_UID, "Memory hotplug resources")
External(MEMORY_SLOTS_NUMBER, IntObj)
/* Memory hotplug IO registers */
OperationRegion(MEMORY_HOTPLUG_IO_REGION, SystemIO,
ACPI_MEMORY_HOTPLUG_BASE,
ACPI_MEMORY_HOTPLUG_IO_LEN)
Name(_CRS, ResourceTemplate() {
IO(Decode16, ACPI_MEMORY_HOTPLUG_BASE, ACPI_MEMORY_HOTPLUG_BASE,
0, ACPI_MEMORY_HOTPLUG_IO_LEN, IO)
})
Method(_STA, 0) {
If (LEqual(MEMORY_SLOTS_NUMBER, Zero)) {
Return(0x0)
}
/* present, functioning, decoding, not shown in UI */
Return(0xB)
}
Field(MEMORY_HOTPLUG_IO_REGION, DWordAcc, NoLock, Preserve) {
MEMORY_SLOT_ADDR_LOW, 32, // read only
MEMORY_SLOT_ADDR_HIGH, 32, // read only
MEMORY_SLOT_SIZE_LOW, 32, // read only
MEMORY_SLOT_SIZE_HIGH, 32, // read only
MEMORY_SLOT_PROXIMITY, 32, // read only
}
Field(MEMORY_HOTPLUG_IO_REGION, ByteAcc, NoLock, Preserve) {
Offset(20),
MEMORY_SLOT_ENABLED, 1, // 1 if enabled, read only
MEMORY_SLOT_INSERT_EVENT, 1, // (read) 1 if has a insert event. (write) 1 to clear event
}
Mutex (MEMORY_SLOT_LOCK, 0)
Field (MEMORY_HOTPLUG_IO_REGION, DWordAcc, NoLock, Preserve) {
MEMORY_SLOT_SLECTOR, 32, // DIMM selector, write only
MEMORY_SLOT_OST_EVENT, 32, // _OST event code, write only
MEMORY_SLOT_OST_STATUS, 32, // _OST status code, write only
}
Method(MEMORY_SLOT_SCAN_METHOD, 0) {
If (LEqual(MEMORY_SLOTS_NUMBER, Zero)) {
Return(Zero)
}
Store(Zero, Local0) // Mem devs iterrator
Acquire(MEMORY_SLOT_LOCK, 0xFFFF)
while (LLess(Local0, MEMORY_SLOTS_NUMBER)) {
Store(Local0, MEMORY_SLOT_SLECTOR) // select Local0 DIMM
If (LEqual(MEMORY_SLOT_INSERT_EVENT, One)) { // Memory device needs check
MEMORY_SLOT_NOTIFY_METHOD(Local0, 1)
Store(1, MEMORY_SLOT_INSERT_EVENT)
}
// TODO: handle memory eject request
Add(Local0, One, Local0) // goto next DIMM
}
Release(MEMORY_SLOT_LOCK)
Return(One)
}
Method(MEMORY_SLOT_STATUS_METHOD, 1) {
Store(Zero, Local0)
Acquire(MEMORY_SLOT_LOCK, 0xFFFF)
Store(ToInteger(Arg0), MEMORY_SLOT_SLECTOR) // select DIMM
If (LEqual(MEMORY_SLOT_ENABLED, One)) {
Store(0xF, Local0)
}
Release(MEMORY_SLOT_LOCK)
Return(Local0)
}
Method(MEMORY_SLOT_CRS_METHOD, 1, Serialized) {
Acquire(MEMORY_SLOT_LOCK, 0xFFFF)
Store(ToInteger(Arg0), MEMORY_SLOT_SLECTOR) // select DIMM
Name(MR64, ResourceTemplate() {
QWordMemory(ResourceProducer, PosDecode, MinFixed, MaxFixed,
Cacheable, ReadWrite,
0x0000000000000000, // Address Space Granularity
0x0000000000000000, // Address Range Minimum
0xFFFFFFFFFFFFFFFE, // Address Range Maximum
0x0000000000000000, // Address Translation Offset
0xFFFFFFFFFFFFFFFF, // Address Length
,, MW64, AddressRangeMemory, TypeStatic)
})
CreateDWordField(MR64, 14, MINL)
CreateDWordField(MR64, 18, MINH)
CreateDWordField(MR64, 38, LENL)
CreateDWordField(MR64, 42, LENH)
CreateDWordField(MR64, 22, MAXL)
CreateDWordField(MR64, 26, MAXH)
Store(MEMORY_SLOT_ADDR_HIGH, MINH)
Store(MEMORY_SLOT_ADDR_LOW, MINL)
Store(MEMORY_SLOT_SIZE_HIGH, LENH)
Store(MEMORY_SLOT_SIZE_LOW, LENL)
// 64-bit math: MAX = MIN + LEN - 1
Add(MINL, LENL, MAXL)
Add(MINH, LENH, MAXH)
If (LLess(MAXL, MINL)) {
Add(MAXH, One, MAXH)
}
If (LLess(MAXL, One)) {
Subtract(MAXH, One, MAXH)
}
Subtract(MAXL, One, MAXL)
If (LEqual(MAXH, Zero)){
Name(MR32, ResourceTemplate() {
DWordMemory(ResourceProducer, PosDecode, MinFixed, MaxFixed,
Cacheable, ReadWrite,
0x00000000, // Address Space Granularity
0x00000000, // Address Range Minimum
0xFFFFFFFE, // Address Range Maximum
0x00000000, // Address Translation Offset
0xFFFFFFFF, // Address Length
,, MW32, AddressRangeMemory, TypeStatic)
})
CreateDWordField(MR32, MW32._MIN, MIN)
CreateDWordField(MR32, MW32._MAX, MAX)
CreateDWordField(MR32, MW32._LEN, LEN)
Store(MINL, MIN)
Store(MAXL, MAX)
Store(LENL, LEN)
Release(MEMORY_SLOT_LOCK)
Return(MR32)
}
Release(MEMORY_SLOT_LOCK)
Return(MR64)
}
Method(MEMORY_SLOT_PROXIMITY_METHOD, 1) {
Acquire(MEMORY_SLOT_LOCK, 0xFFFF)
Store(ToInteger(Arg0), MEMORY_SLOT_SLECTOR) // select DIMM
Store(MEMORY_SLOT_PROXIMITY, Local0)
Release(MEMORY_SLOT_LOCK)
Return(Local0)
}
Method(MEMORY_SLOT_OST_METHOD, 4) {
Acquire(MEMORY_SLOT_LOCK, 0xFFFF)
Store(ToInteger(Arg0), MEMORY_SLOT_SLECTOR) // select DIMM
Store(Arg1, MEMORY_SLOT_OST_EVENT)
Store(Arg2, MEMORY_SLOT_OST_STATUS)
Release(MEMORY_SLOT_LOCK)
}
} // Device()
} // Scope()
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