[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [RFC PATCH v3 03/19][SeaBIOS] acpi-dsdt: Implement function
From: |
Vasilis Liaskovitis |
Subject: |
[Qemu-devel] [RFC PATCH v3 03/19][SeaBIOS] acpi-dsdt: Implement functions for memory hotplug |
Date: |
Fri, 21 Sep 2012 13:17:19 +0200 |
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.
Signed-off-by: Vasilis Liaskovitis <address@hidden>
---
src/acpi-dsdt.dsl | 70 +++++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 68 insertions(+), 2 deletions(-)
diff --git a/src/acpi-dsdt.dsl b/src/acpi-dsdt.dsl
index 2060686..5d3e92b 100644
--- a/src/acpi-dsdt.dsl
+++ b/src/acpi-dsdt.dsl
@@ -737,6 +737,71 @@ DefinitionBlock (
}
Return(One)
}
+ /* 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
+ }
+
+ /* Memory eject byte */
+ OperationRegion(MEMJ, SystemIO, 0xafa0, 1)
+ Field (MEMJ, ByteAcc, NoLock, Preserve)
+ {
+ MPE, 8
+ }
+
+ 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)
+ } Else {
+ MTFY(Local0, 3)
+ }
+ }
+ Increment(Local0)
+ }
+ Return(One)
+ }
+
+ Method (MPEJ, 2, NotSerialized) {
+ // _EJ0 method - eject callback
+ Store(Arg0, MPE)
+ Sleep(200)
+ }
}
@@ -759,8 +824,9 @@ DefinitionBlock (
// CPU hotplug event
Return(\_SB.PRSC())
}
- Method(_L03) {
- Return(0x01)
+ Method(_E03) {
+ // Memory hotplug event
+ Return(\_SB.MESC())
}
Method(_L04) {
Return(0x01)
--
1.7.9
- [Qemu-devel] [RFC PATCH v3 00/19] ACPI memory hotplug, Vasilis Liaskovitis, 2012/09/21
- [Qemu-devel] [RFC PATCH v3 01/19][SeaBIOS] Add ACPI_EXTRACT_DEVICE* macros, Vasilis Liaskovitis, 2012/09/21
- [Qemu-devel] [RFC PATCH v3 03/19][SeaBIOS] acpi-dsdt: Implement functions for memory hotplug,
Vasilis Liaskovitis <=
- [Qemu-devel] [RFC PATCH v3 05/19] Implement dimm device abstraction, Vasilis Liaskovitis, 2012/09/21
- [Qemu-devel] [RFC PATCH v3 04/19][SeaBIOS] acpi: generate hotplug memory devices, Vasilis Liaskovitis, 2012/09/21
- [Qemu-devel] [RFC PATCH v3 07/19] acpi_piix4: Implement memory device hotplug registers, Vasilis Liaskovitis, 2012/09/21
- [Qemu-devel] [RFC PATCH v3 08/19] pc: calculate dimm physical addresses and adjust memory map, Vasilis Liaskovitis, 2012/09/21
[Qemu-devel] [RFC PATCH v3 09/19] pc: Add dimm paravirt SRAT info, Vasilis Liaskovitis, 2012/09/21