ACPI_STATUS
AcpiDsEvaluateNamePath (
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status = AE_OK;
ACPI_PARSE_OBJECT *Op = WalkState->Op;
ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
ACPI_OPERAND_OBJECT *NewObjDesc;
UINT8 Type;
ACPI_FUNCTION_TRACE_PTR (DsEvaluateNamePath, WalkState);
if (!Op->Common.Parent)
{
/* This happens after certain exception processing */
goto Exit;
}
if ((Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
(Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP) ||
(Op->Common.Parent->Common.AmlOpcode == AML_REF_OF_OP))
{
/* TBD: Should we specify this feature as a bit of OpInfo->Flags of these opcodes? */
goto Exit;
}
Status = AcpiDsCreateOperand (WalkState, Op, 0);
if (ACPI_FAILURE (Status))
{
goto Exit;
}
if (Op->Common.Flags & ACPI_PARSEOP_TARGET)
{
NewObjDesc = *Operand;
goto PushResult;
}
Type = (*Operand)->Common.Type;
Status = AcpiExResolveToValue (Operand, WalkState);
if (ACPI_FAILURE (Status))
{
goto Exit;
}
if (Type == ACPI_TYPE_INTEGER)
{
/* It was incremented by AcpiExResolveToValue */
AcpiUtRemoveReference (*Operand);
Status = AcpiUtCopyIobjectToIobject (*Operand, &NewObjDesc, WalkState);
if (ACPI_FAILURE (Status))
{
goto Exit;
}
}
else
{
/*
* The object either was anew created or is
* a Namespace node - don't decrement it.
*/
NewObjDesc = *Operand;
}
/* Cleanup for name-path operand */
Status = AcpiDsObjStackPop (1, WalkState);
if (ACPI_FAILURE (Status))
{
WalkState->ResultObj = NewObjDesc;
goto Exit;
}
PushResult:
WalkState->ResultObj = NewObjDesc;
Status = AcpiDsResultPush (WalkState->ResultObj, WalkState);
if (ACPI_SUCCESS (Status))
{
/* Force to take it from stack */
Op->Common.Flags |= ACPI_PARSEOP_IN_STACK;
}
Exit:
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiDsEvalDataObjectOperands (
ACPI_WALK_STATE *WalkState,
ACPI_PARSE_OBJECT *Op,
ACPI_OPERAND_OBJECT *ObjDesc)
{
ACPI_STATUS Status;
ACPI_OPERAND_OBJECT *ArgDesc;
UINT32 Length;
ACPI_FUNCTION_TRACE (DsEvalDataObjectOperands);
/* The first operand (for all of these data objects) is the length */
/*
* Set proper index into operand stack for AcpiDsObjStackPush
* invoked inside AcpiDsCreateOperand.
*/
WalkState->OperandIndex = WalkState->NumOperands;
Status = AcpiDsCreateOperand (WalkState, Op->Common.Value.Arg, 1);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
Status = AcpiExResolveOperands (WalkState->Opcode,
&(WalkState->Operands [WalkState->NumOperands -1]),
WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Extract length operand */
ArgDesc = WalkState->Operands [WalkState->NumOperands - 1];
Length = (UINT32) ArgDesc->Integer.Value;
/* Cleanup for length operand */
Status = AcpiDsObjStackPop (1, WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
AcpiUtRemoveReference (ArgDesc);
/*
* Create the actual data object
*/
switch (Op->Common.AmlOpcode)
{
case AML_BUFFER_OP:
Status = AcpiDsBuildInternalBufferObj (WalkState, Op, Length, &ObjDesc);
break;
case AML_PACKAGE_OP:
case AML_VAR_PACKAGE_OP:
Status = AcpiDsBuildInternalPackageObj (WalkState, Op, Length, &ObjDesc);
break;
default:
return_ACPI_STATUS (AE_AML_BAD_OPCODE);
}
if (ACPI_SUCCESS (Status))
{
/*
* Return the object in the WalkState, unless the parent is a package -
* in this case, the return object will be stored in the parse tree
* for the package.
*/
if ((!Op->Common.Parent) ||
((Op->Common.Parent->Common.AmlOpcode != AML_PACKAGE_OP) &&
(Op->Common.Parent->Common.AmlOpcode != AML_VAR_PACKAGE_OP) &&
(Op->Common.Parent->Common.AmlOpcode != AML_NAME_OP)))
{
WalkState->ResultObj = ObjDesc;
}
}
return_ACPI_STATUS (Status);
}
