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
AcpiDsCreateOperands (
ACPI_WALK_STATE *WalkState,
ACPI_PARSE_OBJECT *FirstArg)
{
ACPI_STATUS Status = AE_OK;
ACPI_PARSE_OBJECT *Arg;
ACPI_PARSE_OBJECT *Arguments[ACPI_OBJ_NUM_OPERANDS];
UINT32 ArgCount = 0;
UINT32 Index = WalkState->NumOperands;
UINT32 i;
ACPI_FUNCTION_TRACE_PTR (DsCreateOperands, FirstArg);
/* Get all arguments in the list */
Arg = FirstArg;
while (Arg)
{
if (Index >= ACPI_OBJ_NUM_OPERANDS)
{
return_ACPI_STATUS (AE_BAD_DATA);
}
Arguments[Index] = Arg;
WalkState->Operands [Index] = NULL;
/* Move on to next argument, if any */
Arg = Arg->Common.Next;
ArgCount++;
Index++;
}
Index--;
/* It is the appropriate order to get objects from the Result stack */
for (i = 0; i < ArgCount; i++)
{
Arg = Arguments[Index];
/* Force the filling of the operand stack in inverse order */
WalkState->OperandIndex = (UINT8) Index;
Status = AcpiDsCreateOperand (WalkState, Arg, Index);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
Index--;
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Arg #%u (%p) done, Arg1=%p\n",
Index, Arg, FirstArg));
}
return_ACPI_STATUS (Status);
Cleanup:
/*
* We must undo everything done above; meaning that we must
* pop everything off of the operand stack and delete those
* objects
*/
AcpiDsObjStackPopAndDelete (ArgCount, WalkState);
ACPI_EXCEPTION ((AE_INFO, Status, "While creating Arg %u", Index));
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);
}
ACPI_STATUS
AcpiDsEvalBankFieldOperands (
ACPI_WALK_STATE *WalkState,
ACPI_PARSE_OBJECT *Op)
{
ACPI_STATUS Status;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_OPERAND_OBJECT *OperandDesc;
ACPI_NAMESPACE_NODE *Node;
ACPI_PARSE_OBJECT *NextOp;
ACPI_PARSE_OBJECT *Arg;
ACPI_FUNCTION_TRACE_PTR (DsEvalBankFieldOperands, Op);
/*
* This is where we evaluate the BankValue field of the
* BankField declaration
*/
/* NextOp points to the op that holds the Region */
NextOp = Op->Common.Value.Arg;
/* NextOp points to the op that holds the Bank Register */
NextOp = NextOp->Common.Next;
/* NextOp points to the op that holds the Bank Value */
NextOp = NextOp->Common.Next;
/*
* Set proper index into operand stack for AcpiDsObjStackPush
* invoked inside AcpiDsCreateOperand.
*
* We use WalkState->Operands[0] to store the evaluated BankValue
*/
WalkState->OperandIndex = 0;
Status = AcpiDsCreateOperand (WalkState, NextOp, 0);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
Status = AcpiExResolveToValue (&WalkState->Operands[0], WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
ACPI_DUMP_OPERANDS (ACPI_WALK_OPERANDS,
AcpiPsGetOpcodeName (Op->Common.AmlOpcode), 1);
/*
* Get the BankValue operand and save it
* (at Top of stack)
*/
OperandDesc = WalkState->Operands[0];
/* Arg points to the start Bank Field */
Arg = AcpiPsGetArg (Op, 4);
while (Arg)
{
/* Ignore OFFSET and ACCESSAS terms here */
if (Arg->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP)
{
Node = Arg->Common.Node;
ObjDesc = AcpiNsGetAttachedObject (Node);
if (!ObjDesc)
{
return_ACPI_STATUS (AE_NOT_EXIST);
}
ObjDesc->BankField.Value = (UINT32) OperandDesc->Integer.Value;
}
/* Move to next field in the list */
Arg = Arg->Common.Next;
}
AcpiUtRemoveReference (OperandDesc);
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiDsGetPredicateValue (
ACPI_WALK_STATE *WalkState,
ACPI_OPERAND_OBJECT *ResultObj)
{
ACPI_STATUS Status = AE_OK;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_OPERAND_OBJECT *LocalObjDesc = NULL;
ACPI_FUNCTION_TRACE_PTR (DsGetPredicateValue, WalkState);
WalkState->ControlState->Common.State = 0;
if (ResultObj)
{
Status = AcpiDsResultPop (&ObjDesc, WalkState);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Could not get result from predicate evaluation"));
return_ACPI_STATUS (Status);
}
}
else
{
Status = AcpiDsCreateOperand (WalkState, WalkState->Op, 0);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
Status = AcpiExResolveToValue (&WalkState->Operands [0], WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
ObjDesc = WalkState->Operands [0];
}
if (!ObjDesc)
{
ACPI_ERROR ((AE_INFO,
"No predicate ObjDesc=%p State=%p",
ObjDesc, WalkState));
return_ACPI_STATUS (AE_AML_NO_OPERAND);
}
/*
* Result of predicate evaluation must be an Integer
* object. Implicitly convert the argument if necessary.
*/
Status = AcpiExConvertToInteger (ObjDesc, &LocalObjDesc, 16);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
if (LocalObjDesc->Common.Type != ACPI_TYPE_INTEGER)
{
ACPI_ERROR ((AE_INFO,
"Bad predicate (not an integer) ObjDesc=%p State=%p Type=0x%X",
ObjDesc, WalkState, ObjDesc->Common.Type));
Status = AE_AML_OPERAND_TYPE;
goto Cleanup;
}
/* Truncate the predicate to 32-bits if necessary */
(void) AcpiExTruncateFor32bitTable (LocalObjDesc);
/*
* Save the result of the predicate evaluation on
* the control stack
*/
if (LocalObjDesc->Integer.Value)
{
WalkState->ControlState->Common.Value = TRUE;
}
else
{
/*
* Predicate is FALSE, we will just toss the
* rest of the package
*/
WalkState->ControlState->Common.Value = FALSE;
Status = AE_CTRL_FALSE;
}
/* Predicate can be used for an implicit return value */
(void) AcpiDsDoImplicitReturn (LocalObjDesc, WalkState, TRUE);
Cleanup:
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Completed a predicate eval=%X Op=%p\n",
WalkState->ControlState->Common.Value, WalkState->Op));
/* Break to debugger to display result */
AcpiDbDisplayResultObject (LocalObjDesc, WalkState);
/*
* Delete the predicate result object (we know that
* we don't need it anymore)
*/
if (LocalObjDesc != ObjDesc)
{
AcpiUtRemoveReference (LocalObjDesc);
}
AcpiUtRemoveReference (ObjDesc);
WalkState->ControlState->Common.State = ACPI_CONTROL_NORMAL;
return_ACPI_STATUS (Status);
}