1 /******************************************************************************
3 * Module Name: dsfield - Dispatcher field routines
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2016, Intel Corp.
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53 #define _COMPONENT ACPI_DISPATCHER
54 ACPI_MODULE_NAME ("dsfield")
56 /* Local prototypes */
58 #ifdef ACPI_ASL_COMPILER
62 AcpiDsCreateExternalRegion (
63 ACPI_STATUS LookupStatus,
64 ACPI_PARSE_OBJECT *Op,
66 ACPI_WALK_STATE *WalkState,
67 ACPI_NAMESPACE_NODE **Node);
72 ACPI_CREATE_FIELD_INFO *Info,
73 ACPI_WALK_STATE *WalkState,
74 ACPI_PARSE_OBJECT *Arg);
77 #ifdef ACPI_ASL_COMPILER
78 /*******************************************************************************
80 * FUNCTION: AcpiDsCreateExternalRegion (iASL Disassembler only)
82 * PARAMETERS: LookupStatus - Status from NsLookup operation
83 * Op - Op containing the Field definition and args
84 * Path - Pathname of the region
85 * ` WalkState - Current method state
86 * Node - Where the new region node is returned
90 * DESCRIPTION: Add region to the external list if NOT_FOUND. Create a new
93 ******************************************************************************/
96 AcpiDsCreateExternalRegion (
97 ACPI_STATUS LookupStatus,
98 ACPI_PARSE_OBJECT *Op,
100 ACPI_WALK_STATE *WalkState,
101 ACPI_NAMESPACE_NODE **Node)
104 ACPI_OPERAND_OBJECT *ObjDesc;
107 if (LookupStatus != AE_NOT_FOUND)
109 return (LookupStatus);
114 * OperationRegion not found. Generate an External for it, and
115 * insert the name into the namespace.
117 AcpiDmAddOpToExternalList (Op, Path, ACPI_TYPE_REGION, 0, 0);
119 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_REGION,
120 ACPI_IMODE_LOAD_PASS1, ACPI_NS_SEARCH_PARENT, WalkState, Node);
121 if (ACPI_FAILURE (Status))
126 /* Must create and install a region object for the new node */
128 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_REGION);
131 return (AE_NO_MEMORY);
134 ObjDesc->Region.Node = *Node;
135 Status = AcpiNsAttachObject (*Node, ObjDesc, ACPI_TYPE_REGION);
141 /*******************************************************************************
143 * FUNCTION: AcpiDsCreateBufferField
145 * PARAMETERS: Op - Current parse op (CreateXXField)
146 * WalkState - Current state
150 * DESCRIPTION: Execute the CreateField operators:
154 * CreateDwordFieldOp,
155 * CreateQwordFieldOp,
156 * CreateFieldOp (all of which define a field in a buffer)
158 ******************************************************************************/
161 AcpiDsCreateBufferField (
162 ACPI_PARSE_OBJECT *Op,
163 ACPI_WALK_STATE *WalkState)
165 ACPI_PARSE_OBJECT *Arg;
166 ACPI_NAMESPACE_NODE *Node;
168 ACPI_OPERAND_OBJECT *ObjDesc;
169 ACPI_OPERAND_OBJECT *SecondDesc = NULL;
173 ACPI_FUNCTION_TRACE (DsCreateBufferField);
177 * Get the NameString argument (name of the new BufferField)
179 if (Op->Common.AmlOpcode == AML_CREATE_FIELD_OP)
181 /* For CreateField, name is the 4th argument */
183 Arg = AcpiPsGetArg (Op, 3);
187 /* For all other CreateXXXField operators, name is the 3rd argument */
189 Arg = AcpiPsGetArg (Op, 2);
194 return_ACPI_STATUS (AE_AML_NO_OPERAND);
197 if (WalkState->DeferredNode)
199 Node = WalkState->DeferredNode;
204 /* Execute flag should always be set when this function is entered */
206 if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE))
208 return_ACPI_STATUS (AE_AML_INTERNAL);
211 /* Creating new namespace node, should not already exist */
213 Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
214 ACPI_NS_ERROR_IF_FOUND;
217 * Mark node temporary if we are executing a normal control
218 * method. (Don't mark if this is a module-level code method)
220 if (WalkState->MethodNode &&
221 !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL))
223 Flags |= ACPI_NS_TEMPORARY;
226 /* Enter the NameString into the namespace */
228 Status = AcpiNsLookup (WalkState->ScopeInfo,
229 Arg->Common.Value.String, ACPI_TYPE_ANY,
230 ACPI_IMODE_LOAD_PASS1, Flags, WalkState, &Node);
231 if (ACPI_FAILURE (Status))
233 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status);
234 return_ACPI_STATUS (Status);
239 * We could put the returned object (Node) on the object stack for later,
240 * but for now, we will put it in the "op" object that the parser uses,
241 * so we can get it again at the end of this scope.
243 Op->Common.Node = Node;
246 * If there is no object attached to the node, this node was just created
247 * and we need to create the field object. Otherwise, this was a lookup
248 * of an existing node and we don't want to create the field object again.
250 ObjDesc = AcpiNsGetAttachedObject (Node);
253 return_ACPI_STATUS (AE_OK);
257 * The Field definition is not fully parsed at this time.
258 * (We must save the address of the AML for the buffer and index operands)
261 /* Create the buffer field object */
263 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER_FIELD);
266 Status = AE_NO_MEMORY;
271 * Remember location in AML stream of the field unit opcode and operands
272 * -- since the buffer and index operands must be evaluated.
274 SecondDesc = ObjDesc->Common.NextObject;
275 SecondDesc->Extra.AmlStart = Op->Named.Data;
276 SecondDesc->Extra.AmlLength = Op->Named.Length;
277 ObjDesc->BufferField.Node = Node;
279 /* Attach constructed field descriptors to parent node */
281 Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_BUFFER_FIELD);
282 if (ACPI_FAILURE (Status))
290 /* Remove local reference to the object */
292 AcpiUtRemoveReference (ObjDesc);
293 return_ACPI_STATUS (Status);
297 /*******************************************************************************
299 * FUNCTION: AcpiDsGetFieldNames
301 * PARAMETERS: Info - CreateField info structure
302 * ` WalkState - Current method state
303 * Arg - First parser arg for the field name list
307 * DESCRIPTION: Process all named fields in a field declaration. Names are
308 * entered into the namespace.
310 ******************************************************************************/
313 AcpiDsGetFieldNames (
314 ACPI_CREATE_FIELD_INFO *Info,
315 ACPI_WALK_STATE *WalkState,
316 ACPI_PARSE_OBJECT *Arg)
320 ACPI_PARSE_OBJECT *Child;
323 ACPI_FUNCTION_TRACE_PTR (DsGetFieldNames, Info);
326 /* First field starts at bit zero */
328 Info->FieldBitPosition = 0;
330 /* Process all elements in the field list (of parse nodes) */
335 * Four types of field elements are handled:
336 * 1) Name - Enters a new named field into the namespace
337 * 2) Offset - specifies a bit offset
338 * 3) AccessAs - changes the access mode/attributes
339 * 4) Connection - Associate a resource template with the field
341 switch (Arg->Common.AmlOpcode)
343 case AML_INT_RESERVEDFIELD_OP:
345 Position = (UINT64) Info->FieldBitPosition +
346 (UINT64) Arg->Common.Value.Size;
348 if (Position > ACPI_UINT32_MAX)
350 ACPI_ERROR ((AE_INFO,
351 "Bit offset within field too large (> 0xFFFFFFFF)"));
352 return_ACPI_STATUS (AE_SUPPORT);
355 Info->FieldBitPosition = (UINT32) Position;
358 case AML_INT_ACCESSFIELD_OP:
359 case AML_INT_EXTACCESSFIELD_OP:
361 * Get new AccessType, AccessAttribute, and AccessLength fields
362 * -- to be used for all field units that follow, until the
363 * end-of-field or another AccessAs keyword is encountered.
364 * NOTE. These three bytes are encoded in the integer value
365 * of the parseop for convenience.
367 * In FieldFlags, preserve the flag bits other than the
371 /* AccessType (ByteAcc, WordAcc, etc.) */
373 Info->FieldFlags = (UINT8)
374 ((Info->FieldFlags & ~(AML_FIELD_ACCESS_TYPE_MASK)) |
375 ((UINT8) ((UINT32) (Arg->Common.Value.Integer & 0x07))));
377 /* AccessAttribute (AttribQuick, AttribByte, etc.) */
379 Info->Attribute = (UINT8)
380 ((Arg->Common.Value.Integer >> 8) & 0xFF);
382 /* AccessLength (for serial/buffer protocols) */
384 Info->AccessLength = (UINT8)
385 ((Arg->Common.Value.Integer >> 16) & 0xFF);
388 case AML_INT_CONNECTION_OP:
390 * Clear any previous connection. New connection is used for all
391 * fields that follow, similar to AccessAs
393 Info->ResourceBuffer = NULL;
394 Info->ConnectionNode = NULL;
395 Info->PinNumberIndex = 0;
398 * A Connection() is either an actual resource descriptor (buffer)
399 * or a named reference to a resource template
401 Child = Arg->Common.Value.Arg;
402 if (Child->Common.AmlOpcode == AML_INT_BYTELIST_OP)
404 Info->ResourceBuffer = Child->Named.Data;
405 Info->ResourceLength = (UINT16) Child->Named.Value.Integer;
409 /* Lookup the Connection() namepath, it should already exist */
411 Status = AcpiNsLookup (WalkState->ScopeInfo,
412 Child->Common.Value.Name, ACPI_TYPE_ANY,
413 ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE,
414 WalkState, &Info->ConnectionNode);
415 if (ACPI_FAILURE (Status))
417 ACPI_ERROR_NAMESPACE (Child->Common.Value.Name, Status);
418 return_ACPI_STATUS (Status);
423 case AML_INT_NAMEDFIELD_OP:
425 /* Lookup the name, it should already exist */
427 Status = AcpiNsLookup (WalkState->ScopeInfo,
428 (char *) &Arg->Named.Name, Info->FieldType,
429 ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE,
430 WalkState, &Info->FieldNode);
431 if (ACPI_FAILURE (Status))
433 ACPI_ERROR_NAMESPACE ((char *) &Arg->Named.Name, Status);
434 return_ACPI_STATUS (Status);
438 Arg->Common.Node = Info->FieldNode;
439 Info->FieldBitLength = Arg->Common.Value.Size;
442 * If there is no object attached to the node, this node was
443 * just created and we need to create the field object.
444 * Otherwise, this was a lookup of an existing node and we
445 * don't want to create the field object again.
447 if (!AcpiNsGetAttachedObject (Info->FieldNode))
449 Status = AcpiExPrepFieldValue (Info);
450 if (ACPI_FAILURE (Status))
452 return_ACPI_STATUS (Status);
457 /* Keep track of bit position for the next field */
459 Position = (UINT64) Info->FieldBitPosition +
460 (UINT64) Arg->Common.Value.Size;
462 if (Position > ACPI_UINT32_MAX)
464 ACPI_ERROR ((AE_INFO,
465 "Field [%4.4s] bit offset too large (> 0xFFFFFFFF)",
466 ACPI_CAST_PTR (char, &Info->FieldNode->Name)));
467 return_ACPI_STATUS (AE_SUPPORT);
470 Info->FieldBitPosition += Info->FieldBitLength;
471 Info->PinNumberIndex++; /* Index relative to previous Connection() */
476 ACPI_ERROR ((AE_INFO,
477 "Invalid opcode in field list: 0x%X",
478 Arg->Common.AmlOpcode));
479 return_ACPI_STATUS (AE_AML_BAD_OPCODE);
482 Arg = Arg->Common.Next;
485 return_ACPI_STATUS (AE_OK);
489 /*******************************************************************************
491 * FUNCTION: AcpiDsCreateField
493 * PARAMETERS: Op - Op containing the Field definition and args
494 * RegionNode - Object for the containing Operation Region
495 * ` WalkState - Current method state
499 * DESCRIPTION: Create a new field in the specified operation region
501 ******************************************************************************/
505 ACPI_PARSE_OBJECT *Op,
506 ACPI_NAMESPACE_NODE *RegionNode,
507 ACPI_WALK_STATE *WalkState)
510 ACPI_PARSE_OBJECT *Arg;
511 ACPI_CREATE_FIELD_INFO Info;
514 ACPI_FUNCTION_TRACE_PTR (DsCreateField, Op);
517 /* First arg is the name of the parent OpRegion (must already exist) */
519 Arg = Op->Common.Value.Arg;
523 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name,
524 ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE,
525 ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode);
526 #ifdef ACPI_ASL_COMPILER
527 Status = AcpiDsCreateExternalRegion (Status, Arg,
528 Arg->Common.Value.Name, WalkState, &RegionNode);
530 if (ACPI_FAILURE (Status))
532 ACPI_ERROR_NAMESPACE (Arg->Common.Value.Name, Status);
533 return_ACPI_STATUS (Status);
537 memset (&Info, 0, sizeof (ACPI_CREATE_FIELD_INFO));
539 /* Second arg is the field flags */
541 Arg = Arg->Common.Next;
542 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer;
545 /* Each remaining arg is a Named Field */
547 Info.FieldType = ACPI_TYPE_LOCAL_REGION_FIELD;
548 Info.RegionNode = RegionNode;
550 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next);
551 return_ACPI_STATUS (Status);
555 /*******************************************************************************
557 * FUNCTION: AcpiDsInitFieldObjects
559 * PARAMETERS: Op - Op containing the Field definition and args
560 * ` WalkState - Current method state
564 * DESCRIPTION: For each "Field Unit" name in the argument list that is
565 * part of the field declaration, enter the name into the
568 ******************************************************************************/
571 AcpiDsInitFieldObjects (
572 ACPI_PARSE_OBJECT *Op,
573 ACPI_WALK_STATE *WalkState)
576 ACPI_PARSE_OBJECT *Arg = NULL;
577 ACPI_NAMESPACE_NODE *Node;
582 ACPI_FUNCTION_TRACE_PTR (DsInitFieldObjects, Op);
585 /* Execute flag should always be set when this function is entered */
587 if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE))
589 if (WalkState->ParseFlags & ACPI_PARSE_DEFERRED_OP)
591 /* BankField Op is deferred, just return OK */
593 return_ACPI_STATUS (AE_OK);
596 return_ACPI_STATUS (AE_AML_INTERNAL);
600 * Get the FieldList argument for this opcode. This is the start of the
601 * list of field elements.
603 switch (WalkState->Opcode)
607 Arg = AcpiPsGetArg (Op, 2);
608 Type = ACPI_TYPE_LOCAL_REGION_FIELD;
611 case AML_BANK_FIELD_OP:
613 Arg = AcpiPsGetArg (Op, 4);
614 Type = ACPI_TYPE_LOCAL_BANK_FIELD;
617 case AML_INDEX_FIELD_OP:
619 Arg = AcpiPsGetArg (Op, 3);
620 Type = ACPI_TYPE_LOCAL_INDEX_FIELD;
625 return_ACPI_STATUS (AE_BAD_PARAMETER);
628 /* Creating new namespace node(s), should not already exist */
630 Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
631 ACPI_NS_ERROR_IF_FOUND;
634 * Mark node(s) temporary if we are executing a normal control
635 * method. (Don't mark if this is a module-level code method)
637 if (WalkState->MethodNode &&
638 !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL))
640 Flags |= ACPI_NS_TEMPORARY;
644 * Walk the list of entries in the FieldList
645 * Note: FieldList can be of zero length. In this case, Arg will be NULL.
650 * Ignore OFFSET/ACCESSAS/CONNECTION terms here; we are only interested
651 * in the field names in order to enter them into the namespace.
653 if (Arg->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP)
655 Status = AcpiNsLookup (WalkState->ScopeInfo,
656 (char *) &Arg->Named.Name, Type, ACPI_IMODE_LOAD_PASS1,
657 Flags, WalkState, &Node);
658 if (ACPI_FAILURE (Status))
660 ACPI_ERROR_NAMESPACE ((char *) &Arg->Named.Name, Status);
661 if (Status != AE_ALREADY_EXISTS)
663 return_ACPI_STATUS (Status);
666 /* Name already exists, just ignore this error */
671 Arg->Common.Node = Node;
674 /* Get the next field element in the list */
676 Arg = Arg->Common.Next;
679 return_ACPI_STATUS (AE_OK);
683 /*******************************************************************************
685 * FUNCTION: AcpiDsCreateBankField
687 * PARAMETERS: Op - Op containing the Field definition and args
688 * RegionNode - Object for the containing Operation Region
689 * WalkState - Current method state
693 * DESCRIPTION: Create a new bank field in the specified operation region
695 ******************************************************************************/
698 AcpiDsCreateBankField (
699 ACPI_PARSE_OBJECT *Op,
700 ACPI_NAMESPACE_NODE *RegionNode,
701 ACPI_WALK_STATE *WalkState)
704 ACPI_PARSE_OBJECT *Arg;
705 ACPI_CREATE_FIELD_INFO Info;
708 ACPI_FUNCTION_TRACE_PTR (DsCreateBankField, Op);
711 /* First arg is the name of the parent OpRegion (must already exist) */
713 Arg = Op->Common.Value.Arg;
716 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name,
717 ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE,
718 ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode);
719 #ifdef ACPI_ASL_COMPILER
720 Status = AcpiDsCreateExternalRegion (Status, Arg,
721 Arg->Common.Value.Name, WalkState, &RegionNode);
723 if (ACPI_FAILURE (Status))
725 ACPI_ERROR_NAMESPACE (Arg->Common.Value.Name, Status);
726 return_ACPI_STATUS (Status);
730 /* Second arg is the Bank Register (Field) (must already exist) */
732 Arg = Arg->Common.Next;
733 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
734 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
735 ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode);
736 if (ACPI_FAILURE (Status))
738 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status);
739 return_ACPI_STATUS (Status);
743 * Third arg is the BankValue
744 * This arg is a TermArg, not a constant
745 * It will be evaluated later, by AcpiDsEvalBankFieldOperands
747 Arg = Arg->Common.Next;
749 /* Fourth arg is the field flags */
751 Arg = Arg->Common.Next;
752 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer;
754 /* Each remaining arg is a Named Field */
756 Info.FieldType = ACPI_TYPE_LOCAL_BANK_FIELD;
757 Info.RegionNode = RegionNode;
760 * Use Info.DataRegisterNode to store BankField Op
761 * It's safe because DataRegisterNode will never be used when create
762 * bank field \we store AmlStart and AmlLength in the BankField Op for
763 * late evaluation. Used in AcpiExPrepFieldValue(Info)
765 * TBD: Or, should we add a field in ACPI_CREATE_FIELD_INFO, like
768 Info.DataRegisterNode = (ACPI_NAMESPACE_NODE*) Op;
770 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next);
771 return_ACPI_STATUS (Status);
775 /*******************************************************************************
777 * FUNCTION: AcpiDsCreateIndexField
779 * PARAMETERS: Op - Op containing the Field definition and args
780 * RegionNode - Object for the containing Operation Region
781 * ` WalkState - Current method state
785 * DESCRIPTION: Create a new index field in the specified operation region
787 ******************************************************************************/
790 AcpiDsCreateIndexField (
791 ACPI_PARSE_OBJECT *Op,
792 ACPI_NAMESPACE_NODE *RegionNode,
793 ACPI_WALK_STATE *WalkState)
796 ACPI_PARSE_OBJECT *Arg;
797 ACPI_CREATE_FIELD_INFO Info;
800 ACPI_FUNCTION_TRACE_PTR (DsCreateIndexField, Op);
803 /* First arg is the name of the Index register (must already exist) */
805 Arg = Op->Common.Value.Arg;
806 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
807 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
808 ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode);
809 if (ACPI_FAILURE (Status))
811 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status);
812 return_ACPI_STATUS (Status);
815 /* Second arg is the data register (must already exist) */
817 Arg = Arg->Common.Next;
818 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
819 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
820 ACPI_NS_SEARCH_PARENT, WalkState, &Info.DataRegisterNode);
821 if (ACPI_FAILURE (Status))
823 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status);
824 return_ACPI_STATUS (Status);
827 /* Next arg is the field flags */
829 Arg = Arg->Common.Next;
830 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer;
832 /* Each remaining arg is a Named Field */
834 Info.FieldType = ACPI_TYPE_LOCAL_INDEX_FIELD;
835 Info.RegionNode = RegionNode;
837 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next);
838 return_ACPI_STATUS (Status);