[RFC PATCH v3 17/19][SeaBIOS] Implement _PS3 method for memory device

[Vasilis Liaskovitis <vasilis.liaskovitis@xxxxxxxxxxxxxxxx>]

Signed-off-by: Vasilis Liaskovitis <vasilis.liaskovitis@xxxxxxxxxxxxxxxx>
---
 src/acpi-dsdt.dsl |   15 +++++++++++++++
 src/ssdt-mem.dsl  |    4 ++++
 2 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/src/acpi-dsdt.dsl b/src/acpi-dsdt.dsl
index 0d37bbc..8a18770 100644
--- a/src/acpi-dsdt.dsl
+++ b/src/acpi-dsdt.dsl
@@ -784,6 +784,13 @@ DefinitionBlock (
             MIF, 8
         }
 
+        /* Memory _PS3 byte */
+        OperationRegion(MPSB, SystemIO, 0xafa4, 1)
+        Field (MPSB, ByteAcc, NoLock, Preserve)
+        {
+            MPS, 8
+        }
+
         Method(MESC, 0) {
             // Local5 = active memdevice bitmap
             Store (MES, Local5)
@@ -824,6 +831,14 @@ DefinitionBlock (
             Store(Arg0, MPE)
             Sleep(200)
         }
+
+        Method (MPS3, 1, NotSerialized) {
+            // _PS3 method - power-off method
+            Store(Arg0, MPS)
+            Store(Zero, Index(MEON, Arg0))
+            Sleep(200)
+        }
+
         Method (MOST, 3, Serialized) {
             // _OST method - OS status indication
             Switch (And(Arg0, 0xFF)) {
diff --git a/src/ssdt-mem.dsl b/src/ssdt-mem.dsl
index 041d301..7423fc6 100644
--- a/src/ssdt-mem.dsl
+++ b/src/ssdt-mem.dsl
@@ -39,6 +39,7 @@ DefinitionBlock ("ssdt-mem.aml", "SSDT", 0x02, "BXPC", "CSSDT", 0x1)
         External(CMST, MethodObj)
         External(MPEJ, MethodObj)
         External(MOST, MethodObj)
+        External(MPS3, MethodObj)
 
         Name(_CRS, ResourceTemplate() {
             QwordMemory(
@@ -64,6 +65,9 @@ DefinitionBlock ("ssdt-mem.aml", "SSDT", 0x02, "BXPC", "CSSDT", 0x1)
         Method (_OST, 3) {
             MOST(Arg0, Arg1, ID)
         }
+        Method (_PS3, 0) {
+            MPS3(ID)
+        }
     }
 }    
 
-- 
1.7.9

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