Advanced Configuration and Power Interface Specification

ACPI Source Language (ASL)Reference
Parameter MTHD ArgX Type Read operation on ArgX Result of read
Buf, Buffer Store (Arg1, …)
CopyObject (Arg1, …)
Index (Arg1, …)
Field (Arg1, …)
Pkg Package Store (Arg2, …)
CopyObject (Arg2, …)
Index (Arg2, …)
Obj All other object types Store (Arg3, …)
CopyObject (Arg3, …)
Buf
Buf
Index (Buf)
Field (Buf)
Pkg
Pkg
Index (Pkg)
Obj
Obj
2. Store to ArgX parameters
• ObjectReference objects - Automatic dereference, copy the object and overwrite the final
target.
• All other object types- Copy the object and overwrite the ArgX variable. (Direct writes to
buffer or package ArgX parameters will also simply overwrite ArgX)
Table 19-360 Writing to ArgX Objects
Current type of ArgX
Object to be
written
Write operation on ArgX
Result of write (in ArgX)
RefOf (OldObj)
Obj
(Any type)
Store (…, ArgX)
CopyObject (…, ArgX)
RefOf (copy of Obj)
RefOf (copy of Obj)
All other object types
Obj
(Any type)
Store (…, ArgX)
CopyObject (…, ArgX)
Copy of Obj
Copy of Obj
Note: RefOf (ArgX) returns a reference to ArgX.
19.3.5.9.2 LocalX Objects
1. Read from LocalX variables
• ObjectReference - If performing a DeRefOf return the target of the reference. Otherwise,
return the reference.
• All other object types - Return a the object
Table 19-361 Reading from LocalX Objects
Current LocalX Type Read operation on LocalX Result of read
RefOf (Obj)
Obj (All other types)
Store (LocalX, …)
CopyObject (LocalX, …)
DeRefOf (LocalX)
Store (LocalX, …)
CopyObject (LocalX, …)
RefOf (Obj)
RefOf (Obj)
Obj
Obj
Obj
2. Store to LocalX variables
• All object types - Delete any existing object in LocalX first, then store a copy of the object.
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