acpi_object_type acpi_ns_get_type(struct acpi_namespace_node * node)
{
ACPI_FUNCTION_TRACE(ns_get_type);
if (!node) {
ACPI_WARNING((AE_INFO, "Null Node parameter"));
return_UINT8(ACPI_TYPE_ANY);
}
return_UINT8(node->type);
}
ACPI_OBJECT_TYPE
AcpiNsGetType (
ACPI_NAMESPACE_NODE *Node)
{
ACPI_FUNCTION_TRACE (NsGetType);
if (!Node)
{
ACPI_WARNING ((AE_INFO, "Null Node parameter"));
return_UINT8 (ACPI_TYPE_ANY);
}
return_UINT8 (Node->Type);
}
BOOLEAN
AcpiDsIsResultUsed (
ACPI_PARSE_OBJECT *Op,
ACPI_WALK_STATE *WalkState)
{
const ACPI_OPCODE_INFO *ParentInfo;
ACPI_FUNCTION_TRACE_PTR (DsIsResultUsed, Op);
/* Must have both an Op and a Result Object */
if (!Op)
{
ACPI_ERROR ((AE_INFO, "Null Op"));
return_UINT8 (TRUE);
}
/*
* We know that this operator is not a
* Return() operator (would not come here.) The following code is the
* optional support for a so-called "implicit return". Some AML code
* assumes that the last value of the method is "implicitly" returned
* to the caller. Just save the last result as the return value.
* NOTE: this is optional because the ASL language does not actually
* support this behavior.
*/
(void) AcpiDsDoImplicitReturn (WalkState->ResultObj, WalkState, TRUE);
/*
* Now determine if the parent will use the result
*
* If there is no parent, or the parent is a ScopeOp, we are executing
* at the method level. An executing method typically has no parent,
* since each method is parsed separately. A method invoked externally
* via ExecuteControlMethod has a ScopeOp as the parent.
*/
if ((!Op->Common.Parent) ||
(Op->Common.Parent->Common.AmlOpcode == AML_SCOPE_OP))
{
/* No parent, the return value cannot possibly be used */
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"At Method level, result of [%s] not used\n",
AcpiPsGetOpcodeName (Op->Common.AmlOpcode)));
return_UINT8 (FALSE);
}
/* Get info on the parent. The RootOp is AML_SCOPE */
ParentInfo = AcpiPsGetOpcodeInfo (Op->Common.Parent->Common.AmlOpcode);
if (ParentInfo->Class == AML_CLASS_UNKNOWN)
{
ACPI_ERROR ((AE_INFO,
"Unknown parent opcode Op=%p", Op));
return_UINT8 (FALSE);
}
/*
* Decide what to do with the result based on the parent. If
* the parent opcode will not use the result, delete the object.
* Otherwise leave it as is, it will be deleted when it is used
* as an operand later.
*/
switch (ParentInfo->Class)
{
case AML_CLASS_CONTROL:
switch (Op->Common.Parent->Common.AmlOpcode)
{
case AML_RETURN_OP:
/* Never delete the return value associated with a return opcode */
goto ResultUsed;
case AML_IF_OP:
case AML_WHILE_OP:
/*
* If we are executing the predicate AND this is the predicate op,
* we will use the return value
*/
if ((WalkState->ControlState->Common.State == ACPI_CONTROL_PREDICATE_EXECUTING) &&
(WalkState->ControlState->Control.PredicateOp == Op))
{
goto ResultUsed;
}
break;
default:
/* Ignore other control opcodes */
break;
}
/* The general control opcode returns no result */
goto ResultNotUsed;
case AML_CLASS_CREATE:
/*
* These opcodes allow TermArg(s) as operands and therefore
* the operands can be method calls. The result is used.
*/
goto ResultUsed;
case AML_CLASS_NAMED_OBJECT:
if ((Op->Common.Parent->Common.AmlOpcode == AML_REGION_OP) ||
(Op->Common.Parent->Common.AmlOpcode == AML_DATA_REGION_OP) ||
(Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
(Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP) ||
(Op->Common.Parent->Common.AmlOpcode == AML_BUFFER_OP) ||
(Op->Common.Parent->Common.AmlOpcode == AML_INT_EVAL_SUBTREE_OP) ||
(Op->Common.Parent->Common.AmlOpcode == AML_BANK_FIELD_OP))
{
/*
* These opcodes allow TermArg(s) as operands and therefore
* the operands can be method calls. The result is used.
*/
goto ResultUsed;
}
goto ResultNotUsed;
default:
/*
* In all other cases. the parent will actually use the return
* object, so keep it.
*/
goto ResultUsed;
}
ResultUsed:
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"Result of [%s] used by Parent [%s] Op=%p\n",
AcpiPsGetOpcodeName (Op->Common.AmlOpcode),
AcpiPsGetOpcodeName (Op->Common.Parent->Common.AmlOpcode), Op));
return_UINT8 (TRUE);
ResultNotUsed:
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"Result of [%s] not used by Parent [%s] Op=%p\n",
AcpiPsGetOpcodeName (Op->Common.AmlOpcode),
AcpiPsGetOpcodeName (Op->Common.Parent->Common.AmlOpcode), Op));
return_UINT8 (FALSE);
}
