ACPI_STATUS
AcpiDsGetRegionArguments (
ACPI_OPERAND_OBJECT *ObjDesc)
{
ACPI_NAMESPACE_NODE *Node;
ACPI_STATUS Status;
ACPI_OPERAND_OBJECT *ExtraDesc;
ACPI_FUNCTION_TRACE_PTR (DsGetRegionArguments, ObjDesc);
if (ObjDesc->Region.Flags & AOPOBJ_DATA_VALID)
{
return_ACPI_STATUS (AE_OK);
}
ExtraDesc = AcpiNsGetSecondaryObject (ObjDesc);
if (!ExtraDesc)
{
return_ACPI_STATUS (AE_NOT_EXIST);
}
/* Get the Region node */
Node = ObjDesc->Region.Node;
ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname (
ACPI_TYPE_REGION, Node, NULL));
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"[%4.4s] OpRegion Arg Init at AML %p\n",
AcpiUtGetNodeName (Node), ExtraDesc->Extra.AmlStart));
/* Execute the argument AML */
Status = AcpiDsExecuteArguments (Node, ExtraDesc->Extra.ScopeNode,
ExtraDesc->Extra.AmlLength, ExtraDesc->Extra.AmlStart);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
Status = AcpiUtAddAddressRange (ObjDesc->Region.SpaceId,
ObjDesc->Region.Address, ObjDesc->Region.Length, Node);
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiDsEvalRegionOperands (
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_ADR_SPACE_TYPE SpaceId;
ACPI_FUNCTION_TRACE_PTR (DsEvalRegionOperands, Op);
/*
* This is where we evaluate the address and length fields of the
* OpRegion declaration
*/
Node = Op->Common.Node;
/* NextOp points to the op that holds the SpaceID */
NextOp = Op->Common.Value.Arg;
SpaceId = (ACPI_ADR_SPACE_TYPE) NextOp->Common.Value.Integer;
/* NextOp points to address op */
NextOp = NextOp->Common.Next;
/* Evaluate/create the address and length operands */
Status = AcpiDsCreateOperands (WalkState, NextOp);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Resolve the length and address operands to numbers */
Status = AcpiExResolveOperands (
Op->Common.AmlOpcode, ACPI_WALK_OPERANDS, WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
ObjDesc = AcpiNsGetAttachedObject (Node);
if (!ObjDesc)
{
return_ACPI_STATUS (AE_NOT_EXIST);
}
/*
* Get the length operand and save it
* (at Top of stack)
*/
OperandDesc = WalkState->Operands[WalkState->NumOperands - 1];
ObjDesc->Region.Length = (UINT32) OperandDesc->Integer.Value;
AcpiUtRemoveReference (OperandDesc);
/* A zero-length operation region is unusable. Just warn */
if (!ObjDesc->Region.Length && (SpaceId < ACPI_NUM_PREDEFINED_REGIONS))
{
ACPI_WARNING ((AE_INFO,
"Operation Region [%4.4s] has zero length (SpaceId %X)",
Node->Name.Ascii, SpaceId));
}
/*
* Get the address and save it
* (at top of stack - 1)
*/
OperandDesc = WalkState->Operands[WalkState->NumOperands - 2];
ObjDesc->Region.Address = (ACPI_PHYSICAL_ADDRESS)
OperandDesc->Integer.Value;
AcpiUtRemoveReference (OperandDesc);
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
ObjDesc, ACPI_FORMAT_UINT64 (ObjDesc->Region.Address),
ObjDesc->Region.Length));
Status = AcpiUtAddAddressRange (ObjDesc->Region.SpaceId,
ObjDesc->Region.Address, ObjDesc->Region.Length, Node);
/* Now the address and length are valid for this opregion */
ObjDesc->Region.Flags |= AOPOBJ_DATA_VALID;
return_ACPI_STATUS (Status);
}
