static void
AcpiDsMethodDataDeleteValue (
UINT8 Type,
UINT32 Index,
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status;
ACPI_NAMESPACE_NODE *Node;
ACPI_OPERAND_OBJECT *Object;
ACPI_FUNCTION_TRACE (DsMethodDataDeleteValue);
/* Get the namespace node for the arg/local */
Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node);
if (ACPI_FAILURE (Status))
{
return_VOID;
}
/* Get the associated object */
Object = AcpiNsGetAttachedObject (Node);
/*
* Undefine the Arg or Local by setting its descriptor
* pointer to NULL. Locals/Args can contain both
* ACPI_OPERAND_OBJECTS and ACPI_NAMESPACE_NODEs
*/
Node->Object = NULL;
if ((Object) &&
(ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_OPERAND))
{
/*
* There is a valid object.
* Decrement the reference count by one to balance the
* increment when the object was stored.
*/
AcpiUtRemoveReference (Object);
}
return_VOID;
}
static ACPI_STATUS
AcpiDsMethodDataSetValue (
UINT8 Type,
UINT32 Index,
ACPI_OPERAND_OBJECT *Object,
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status;
ACPI_NAMESPACE_NODE *Node;
ACPI_FUNCTION_TRACE (DsMethodDataSetValue);
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"NewObj %p Type %2.2X, Refs=%u [%s]\n", Object,
Type, Object->Common.ReferenceCount,
AcpiUtGetTypeName (Object->Common.Type)));
/* Get the namespace node for the arg/local */
Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* Increment ref count so object can't be deleted while installed.
* NOTE: We do not copy the object in order to preserve the call by
* reference semantics of ACPI Control Method invocation.
* (See ACPI Specification 2.0C)
*/
AcpiUtAddReference (Object);
/* Install the object */
Node->Object = Object;
return_ACPI_STATUS (Status);
}
ACPI_OBJECT_TYPE
AcpiDsMethodDataGetType (
UINT16 Opcode,
UINT32 Index,
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status;
ACPI_NAMESPACE_NODE *Node;
ACPI_OPERAND_OBJECT *Object;
ACPI_FUNCTION_TRACE (DsMethodDataGetType);
/* Get the namespace node for the arg/local */
Status = AcpiDsMethodDataGetNode (Opcode, Index, WalkState, &Node);
if (ACPI_FAILURE (Status))
{
return_VALUE ((ACPI_TYPE_NOT_FOUND));
}
/* Get the object */
Object = AcpiNsGetAttachedObject (Node);
if (!Object)
{
/* Uninitialized local/arg, return TYPE_ANY */
return_VALUE (ACPI_TYPE_ANY);
}
/* Get the object type */
return_VALUE (Object->Type);
}
ACPI_STATUS
AcpiDsInitObjectFromOp (
ACPI_WALK_STATE *WalkState,
ACPI_PARSE_OBJECT *Op,
UINT16 Opcode,
ACPI_OPERAND_OBJECT **RetObjDesc)
{
const ACPI_OPCODE_INFO *OpInfo;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (DsInitObjectFromOp);
ObjDesc = *RetObjDesc;
OpInfo = AcpiPsGetOpcodeInfo (Opcode);
if (OpInfo->Class == AML_CLASS_UNKNOWN)
{
/* Unknown opcode */
return_ACPI_STATUS (AE_TYPE);
}
/* Perform per-object initialization */
switch (ObjDesc->Common.Type)
{
case ACPI_TYPE_BUFFER:
/*
* Defer evaluation of Buffer TermArg operand
*/
ObjDesc->Buffer.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE,
WalkState->Operands[0]);
ObjDesc->Buffer.AmlStart = Op->Named.Data;
ObjDesc->Buffer.AmlLength = Op->Named.Length;
break;
case ACPI_TYPE_PACKAGE:
/*
* Defer evaluation of Package TermArg operand
*/
ObjDesc->Package.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE,
WalkState->Operands[0]);
ObjDesc->Package.AmlStart = Op->Named.Data;
ObjDesc->Package.AmlLength = Op->Named.Length;
break;
case ACPI_TYPE_INTEGER:
switch (OpInfo->Type)
{
case AML_TYPE_CONSTANT:
/*
* Resolve AML Constants here - AND ONLY HERE!
* All constants are integers.
* We mark the integer with a flag that indicates that it started
* life as a constant -- so that stores to constants will perform
* as expected (noop). ZeroOp is used as a placeholder for optional
* target operands.
*/
ObjDesc->Common.Flags = AOPOBJ_AML_CONSTANT;
switch (Opcode)
{
case AML_ZERO_OP:
ObjDesc->Integer.Value = 0;
break;
case AML_ONE_OP:
ObjDesc->Integer.Value = 1;
break;
case AML_ONES_OP:
ObjDesc->Integer.Value = ACPI_UINT64_MAX;
/* Truncate value if we are executing from a 32-bit ACPI table */
#ifndef ACPI_NO_METHOD_EXECUTION
(void) AcpiExTruncateFor32bitTable (ObjDesc);
#endif
break;
case AML_REVISION_OP:
ObjDesc->Integer.Value = ACPI_CA_VERSION;
break;
default:
ACPI_ERROR ((AE_INFO,
"Unknown constant opcode 0x%X", Opcode));
Status = AE_AML_OPERAND_TYPE;
break;
}
break;
case AML_TYPE_LITERAL:
ObjDesc->Integer.Value = Op->Common.Value.Integer;
#ifndef ACPI_NO_METHOD_EXECUTION
if (AcpiExTruncateFor32bitTable (ObjDesc))
{
/* Warn if we found a 64-bit constant in a 32-bit table */
ACPI_WARNING ((AE_INFO,
"Truncated 64-bit constant found in 32-bit table: %8.8X%8.8X => %8.8X",
ACPI_FORMAT_UINT64 (Op->Common.Value.Integer),
(UINT32) ObjDesc->Integer.Value));
}
#endif
break;
default:
ACPI_ERROR ((AE_INFO, "Unknown Integer type 0x%X",
OpInfo->Type));
Status = AE_AML_OPERAND_TYPE;
break;
}
break;
case ACPI_TYPE_STRING:
ObjDesc->String.Pointer = Op->Common.Value.String;
ObjDesc->String.Length = (UINT32) ACPI_STRLEN (Op->Common.Value.String);
/*
* The string is contained in the ACPI table, don't ever try
* to delete it
*/
ObjDesc->Common.Flags |= AOPOBJ_STATIC_POINTER;
break;
case ACPI_TYPE_METHOD:
break;
case ACPI_TYPE_LOCAL_REFERENCE:
switch (OpInfo->Type)
{
case AML_TYPE_LOCAL_VARIABLE:
/* Local ID (0-7) is (AML opcode - base AML_LOCAL_OP) */
ObjDesc->Reference.Value = ((UINT32) Opcode) - AML_LOCAL_OP;
ObjDesc->Reference.Class = ACPI_REFCLASS_LOCAL;
#ifndef ACPI_NO_METHOD_EXECUTION
Status = AcpiDsMethodDataGetNode (ACPI_REFCLASS_LOCAL,
ObjDesc->Reference.Value, WalkState,
ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE,
&ObjDesc->Reference.Object));
#endif
break;
case AML_TYPE_METHOD_ARGUMENT:
/* Arg ID (0-6) is (AML opcode - base AML_ARG_OP) */
ObjDesc->Reference.Value = ((UINT32) Opcode) - AML_ARG_OP;
ObjDesc->Reference.Class = ACPI_REFCLASS_ARG;
#ifndef ACPI_NO_METHOD_EXECUTION
Status = AcpiDsMethodDataGetNode (ACPI_REFCLASS_ARG,
ObjDesc->Reference.Value, WalkState,
ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE,
&ObjDesc->Reference.Object));
#endif
break;
default: /* Object name or Debug object */
switch (Op->Common.AmlOpcode)
{
case AML_INT_NAMEPATH_OP:
/* Node was saved in Op */
ObjDesc->Reference.Node = Op->Common.Node;
ObjDesc->Reference.Object = Op->Common.Node->Object;
ObjDesc->Reference.Class = ACPI_REFCLASS_NAME;
break;
case AML_DEBUG_OP:
ObjDesc->Reference.Class = ACPI_REFCLASS_DEBUG;
break;
default:
ACPI_ERROR ((AE_INFO,
"Unimplemented reference type for AML opcode: 0x%4.4X", Opcode));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
break;
}
break;
default:
ACPI_ERROR ((AE_INFO, "Unimplemented data type: 0x%X",
ObjDesc->Common.Type));
Status = AE_AML_OPERAND_TYPE;
break;
}
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiDsStoreObjectToLocal (
UINT8 Type,
UINT32 Index,
ACPI_OPERAND_OBJECT *ObjDesc,
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status;
ACPI_NAMESPACE_NODE *Node;
ACPI_OPERAND_OBJECT *CurrentObjDesc;
ACPI_OPERAND_OBJECT *NewObjDesc;
ACPI_FUNCTION_TRACE (DsStoreObjectToLocal);
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Type=%2.2X Index=%u Obj=%p\n",
Type, Index, ObjDesc));
/* Parameter validation */
if (!ObjDesc)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Get the namespace node for the arg/local */
Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
CurrentObjDesc = AcpiNsGetAttachedObject (Node);
if (CurrentObjDesc == ObjDesc)
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p already installed!\n",
ObjDesc));
return_ACPI_STATUS (Status);
}
/*
* If the reference count on the object is more than one, we must
* take a copy of the object before we store. A reference count
* of exactly 1 means that the object was just created during the
* evaluation of an expression, and we can safely use it since it
* is not used anywhere else.
*/
NewObjDesc = ObjDesc;
if (ObjDesc->Common.ReferenceCount > 1)
{
Status = AcpiUtCopyIobjectToIobject (ObjDesc, &NewObjDesc, WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
/*
* If there is an object already in this slot, we either
* have to delete it, or if this is an argument and there
* is an object reference stored there, we have to do
* an indirect store!
*/
if (CurrentObjDesc)
{
/*
* Check for an indirect store if an argument
* contains an object reference (stored as an Node).
* We don't allow this automatic dereferencing for
* locals, since a store to a local should overwrite
* anything there, including an object reference.
*
* If both Arg0 and Local0 contain RefOf (Local4):
*
* Store (1, Arg0) - Causes indirect store to local4
* Store (1, Local0) - Stores 1 in local0, overwriting
* the reference to local4
* Store (1, DeRefof (Local0)) - Causes indirect store to local4
*
* Weird, but true.
*/
if (Type == ACPI_REFCLASS_ARG)
{
/*
* If we have a valid reference object that came from RefOf(),
* do the indirect store
*/
if ((ACPI_GET_DESCRIPTOR_TYPE (CurrentObjDesc) == ACPI_DESC_TYPE_OPERAND) &&
(CurrentObjDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
(CurrentObjDesc->Reference.Class == ACPI_REFCLASS_REFOF))
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Arg (%p) is an ObjRef(Node), storing in node %p\n",
NewObjDesc, CurrentObjDesc));
/*
* Store this object to the Node (perform the indirect store)
* NOTE: No implicit conversion is performed, as per the ACPI
* specification rules on storing to Locals/Args.
*/
Status = AcpiExStoreObjectToNode (NewObjDesc,
CurrentObjDesc->Reference.Object, WalkState,
ACPI_NO_IMPLICIT_CONVERSION);
/* Remove local reference if we copied the object above */
if (NewObjDesc != ObjDesc)
{
AcpiUtRemoveReference (NewObjDesc);
}
return_ACPI_STATUS (Status);
}
}
/* Delete the existing object before storing the new one */
AcpiDsMethodDataDeleteValue (Type, Index, WalkState);
}
/*
* Install the Obj descriptor (*NewObjDesc) into
* the descriptor for the Arg or Local.
* (increments the object reference count by one)
*/
Status = AcpiDsMethodDataSetValue (Type, Index, NewObjDesc, WalkState);
/* Remove local reference if we copied the object above */
if (NewObjDesc != ObjDesc)
{
AcpiUtRemoveReference (NewObjDesc);
}
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiDsMethodDataGetValue (
UINT8 Type,
UINT32 Index,
ACPI_WALK_STATE *WalkState,
ACPI_OPERAND_OBJECT **DestDesc)
{
ACPI_STATUS Status;
ACPI_NAMESPACE_NODE *Node;
ACPI_OPERAND_OBJECT *Object;
ACPI_FUNCTION_TRACE (DsMethodDataGetValue);
/* Validate the object descriptor */
if (!DestDesc)
{
ACPI_ERROR ((AE_INFO, "Null object descriptor pointer"));
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Get the namespace node for the arg/local */
Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Get the object from the node */
Object = Node->Object;
/* Examine the returned object, it must be valid. */
if (!Object)
{
/*
* Index points to uninitialized object.
* This means that either 1) The expected argument was
* not passed to the method, or 2) A local variable
* was referenced by the method (via the ASL)
* before it was initialized. Either case is an error.
*/
/* If slack enabled, init the LocalX/ArgX to an Integer of value zero */
if (AcpiGbl_EnableInterpreterSlack)
{
Object = AcpiUtCreateIntegerObject ((UINT64) 0);
if (!Object)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
Node->Object = Object;
}
/* Otherwise, return the error */
else switch (Type)
{
case ACPI_REFCLASS_ARG:
ACPI_ERROR ((AE_INFO,
"Uninitialized Arg[%u] at node %p",
Index, Node));
return_ACPI_STATUS (AE_AML_UNINITIALIZED_ARG);
case ACPI_REFCLASS_LOCAL:
/*
* No error message for this case, will be trapped again later to
* detect and ignore cases of Store(LocalX,LocalX)
*/
return_ACPI_STATUS (AE_AML_UNINITIALIZED_LOCAL);
default:
ACPI_ERROR ((AE_INFO, "Not a Arg/Local opcode: 0x%X", Type));
return_ACPI_STATUS (AE_AML_INTERNAL);
}
}
/*
* The Index points to an initialized and valid object.
* Return an additional reference to the object
*/
*DestDesc = Object;
AcpiUtAddReference (Object);
return_ACPI_STATUS (AE_OK);
}
ACPI_STATUS
AcpiDsInitObjectFromOp (
ACPI_WALK_STATE *WalkState,
ACPI_PARSE_OBJECT *Op,
UINT16 Opcode,
ACPI_OPERAND_OBJECT **RetObjDesc)
{
const ACPI_OPCODE_INFO *OpInfo;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (DsInitObjectFromOp);
ObjDesc = *RetObjDesc;
OpInfo = AcpiPsGetOpcodeInfo (Opcode);
if (OpInfo->Class == AML_CLASS_UNKNOWN)
{
/* Unknown opcode */
return_ACPI_STATUS (AE_TYPE);
}
/* Perform per-object initialization */
switch (ACPI_GET_OBJECT_TYPE (ObjDesc))
{
case ACPI_TYPE_BUFFER:
/*
* Defer evaluation of Buffer TermArg operand
*/
ObjDesc->Buffer.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE,
WalkState->Operands[0]);
ObjDesc->Buffer.AmlStart = Op->Named.Data;
ObjDesc->Buffer.AmlLength = Op->Named.Length;
break;
case ACPI_TYPE_PACKAGE:
/*
* Defer evaluation of Package TermArg operand
*/
ObjDesc->Package.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE,
WalkState->Operands[0]);
ObjDesc->Package.AmlStart = Op->Named.Data;
ObjDesc->Package.AmlLength = Op->Named.Length;
break;
case ACPI_TYPE_INTEGER:
switch (OpInfo->Type)
{
case AML_TYPE_CONSTANT:
/*
* Resolve AML Constants here - AND ONLY HERE!
* All constants are integers.
* We mark the integer with a flag that indicates that it started
* life as a constant -- so that stores to constants will perform
* as expected (noop). ZeroOp is used as a placeholder for optional
* target operands.
*/
ObjDesc->Common.Flags = AOPOBJ_AML_CONSTANT;
switch (Opcode)
{
case AML_ZERO_OP:
ObjDesc->Integer.Value = 0;
break;
case AML_ONE_OP:
ObjDesc->Integer.Value = 1;
break;
case AML_ONES_OP:
ObjDesc->Integer.Value = ACPI_INTEGER_MAX;
/* Truncate value if we are executing from a 32-bit ACPI table */
#ifndef ACPI_NO_METHOD_EXECUTION
AcpiExTruncateFor32bitTable (ObjDesc);
#endif
break;
case AML_REVISION_OP:
ObjDesc->Integer.Value = ACPI_CA_VERSION;
break;
default:
ACPI_ERROR ((AE_INFO,
"Unknown constant opcode %X", Opcode));
Status = AE_AML_OPERAND_TYPE;
break;
}
break;
case AML_TYPE_LITERAL:
ObjDesc->Integer.Value = Op->Common.Value.Integer;
#ifndef ACPI_NO_METHOD_EXECUTION
AcpiExTruncateFor32bitTable (ObjDesc);
#endif
break;
default:
ACPI_ERROR ((AE_INFO, "Unknown Integer type %X",
OpInfo->Type));
Status = AE_AML_OPERAND_TYPE;
break;
}
break;
case ACPI_TYPE_STRING:
ObjDesc->String.Pointer = Op->Common.Value.String;
ObjDesc->String.Length = (UINT32) ACPI_STRLEN (Op->Common.Value.String);
/*
* The string is contained in the ACPI table, don't ever try
* to delete it
*/
ObjDesc->Common.Flags |= AOPOBJ_STATIC_POINTER;
break;
case ACPI_TYPE_METHOD:
break;
case ACPI_TYPE_LOCAL_REFERENCE:
switch (OpInfo->Type)
{
case AML_TYPE_LOCAL_VARIABLE:
/* Split the opcode into a base opcode + offset */
ObjDesc->Reference.Opcode = AML_LOCAL_OP;
ObjDesc->Reference.Offset = Opcode - AML_LOCAL_OP;
#ifndef ACPI_NO_METHOD_EXECUTION
Status = AcpiDsMethodDataGetNode (AML_LOCAL_OP,
ObjDesc->Reference.Offset,
WalkState,
(ACPI_NAMESPACE_NODE **) &ObjDesc->Reference.Object);
#endif
break;
case AML_TYPE_METHOD_ARGUMENT:
/* Split the opcode into a base opcode + offset */
ObjDesc->Reference.Opcode = AML_ARG_OP;
ObjDesc->Reference.Offset = Opcode - AML_ARG_OP;
#ifndef ACPI_NO_METHOD_EXECUTION
Status = AcpiDsMethodDataGetNode (AML_ARG_OP,
ObjDesc->Reference.Offset,
WalkState,
(ACPI_NAMESPACE_NODE **) &ObjDesc->Reference.Object);
#endif
break;
default: /* Other literals, etc.. */
if (Op->Common.AmlOpcode == AML_INT_NAMEPATH_OP)
{
/* Node was saved in Op */
ObjDesc->Reference.Node = Op->Common.Node;
}
ObjDesc->Reference.Opcode = Opcode;
break;
}
break;
default:
ACPI_ERROR ((AE_INFO, "Unimplemented data type: %X",
ACPI_GET_OBJECT_TYPE (ObjDesc)));
Status = AE_AML_OPERAND_TYPE;
break;
}
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiExResolveMultiple (
ACPI_WALK_STATE *WalkState,
ACPI_OPERAND_OBJECT *Operand,
ACPI_OBJECT_TYPE *ReturnType,
ACPI_OPERAND_OBJECT **ReturnDesc)
{
ACPI_OPERAND_OBJECT *ObjDesc = (void *) Operand;
ACPI_NAMESPACE_NODE *Node;
ACPI_OBJECT_TYPE Type;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (AcpiExResolveMultiple);
/* Operand can be either a namespace node or an operand descriptor */
switch (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc))
{
case ACPI_DESC_TYPE_OPERAND:
Type = ObjDesc->Common.Type;
break;
case ACPI_DESC_TYPE_NAMED:
Type = ((ACPI_NAMESPACE_NODE *) ObjDesc)->Type;
ObjDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) ObjDesc);
/* If we had an Alias node, use the attached object for type info */
if (Type == ACPI_TYPE_LOCAL_ALIAS)
{
Type = ((ACPI_NAMESPACE_NODE *) ObjDesc)->Type;
ObjDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) ObjDesc);
}
break;
default:
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
/* If type is anything other than a reference, we are done */
if (Type != ACPI_TYPE_LOCAL_REFERENCE)
{
goto Exit;
}
/*
* For reference objects created via the RefOf, Index, or Load/LoadTable
* operators, we need to get to the base object (as per the ACPI
* specification of the ObjectType and SizeOf operators). This means
* traversing the list of possibly many nested references.
*/
while (ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE)
{
switch (ObjDesc->Reference.Class)
{
case ACPI_REFCLASS_REFOF:
case ACPI_REFCLASS_NAME:
/* Dereference the reference pointer */
if (ObjDesc->Reference.Class == ACPI_REFCLASS_REFOF)
{
Node = ObjDesc->Reference.Object;
}
else /* AML_INT_NAMEPATH_OP */
{
Node = ObjDesc->Reference.Node;
}
/* All "References" point to a NS node */
if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED)
{
ACPI_ERROR ((AE_INFO,
"Not a namespace node %p [%s]",
Node, AcpiUtGetDescriptorName (Node)));
return_ACPI_STATUS (AE_AML_INTERNAL);
}
/* Get the attached object */
ObjDesc = AcpiNsGetAttachedObject (Node);
if (!ObjDesc)
{
/* No object, use the NS node type */
Type = AcpiNsGetType (Node);
goto Exit;
}
/* Check for circular references */
if (ObjDesc == Operand)
{
return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE);
}
break;
case ACPI_REFCLASS_INDEX:
/* Get the type of this reference (index into another object) */
Type = ObjDesc->Reference.TargetType;
if (Type != ACPI_TYPE_PACKAGE)
{
goto Exit;
}
/*
* The main object is a package, we want to get the type
* of the individual package element that is referenced by
* the index.
*
* This could of course in turn be another reference object.
*/
ObjDesc = *(ObjDesc->Reference.Where);
if (!ObjDesc)
{
/* NULL package elements are allowed */
Type = 0; /* Uninitialized */
goto Exit;
}
break;
case ACPI_REFCLASS_TABLE:
Type = ACPI_TYPE_DDB_HANDLE;
goto Exit;
case ACPI_REFCLASS_LOCAL:
case ACPI_REFCLASS_ARG:
if (ReturnDesc)
{
Status = AcpiDsMethodDataGetValue (ObjDesc->Reference.Class,
ObjDesc->Reference.Value, WalkState, &ObjDesc);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
AcpiUtRemoveReference (ObjDesc);
}
else
{
Status = AcpiDsMethodDataGetNode (ObjDesc->Reference.Class,
ObjDesc->Reference.Value, WalkState, &Node);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
ObjDesc = AcpiNsGetAttachedObject (Node);
if (!ObjDesc)
{
Type = ACPI_TYPE_ANY;
goto Exit;
}
}
break;
case ACPI_REFCLASS_DEBUG:
/* The Debug Object is of type "DebugObject" */
Type = ACPI_TYPE_DEBUG_OBJECT;
goto Exit;
default:
ACPI_ERROR ((AE_INFO,
"Unknown Reference Class 0x%2.2X", ObjDesc->Reference.Class));
return_ACPI_STATUS (AE_AML_INTERNAL);
}
}
/*
* Now we are guaranteed to have an object that has not been created
* via the RefOf or Index operators.
*/
Type = ObjDesc->Common.Type;
Exit:
/* Convert internal types to external types */
switch (Type)
{
case ACPI_TYPE_LOCAL_REGION_FIELD:
case ACPI_TYPE_LOCAL_BANK_FIELD:
case ACPI_TYPE_LOCAL_INDEX_FIELD:
Type = ACPI_TYPE_FIELD_UNIT;
break;
case ACPI_TYPE_LOCAL_SCOPE:
/* Per ACPI Specification, Scope is untyped */
Type = ACPI_TYPE_ANY;
break;
default:
/* No change to Type required */
break;
}
*ReturnType = Type;
if (ReturnDesc)
{
*ReturnDesc = ObjDesc;
}
return_ACPI_STATUS (AE_OK);
}
