1 /******************************************************************************
3 * Module Name: dsfield - Dispatcher field routines
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2015, Intel Corp.
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12 * modification, are permitted provided that the following conditions
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15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
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20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
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23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
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44 #include <contrib/dev/acpica/include/acpi.h>
45 #include <contrib/dev/acpica/include/accommon.h>
46 #include <contrib/dev/acpica/include/amlcode.h>
47 #include <contrib/dev/acpica/include/acdispat.h>
48 #include <contrib/dev/acpica/include/acinterp.h>
49 #include <contrib/dev/acpica/include/acnamesp.h>
50 #include <contrib/dev/acpica/include/acparser.h>
53 #define _COMPONENT ACPI_DISPATCHER
54 ACPI_MODULE_NAME ("dsfield")
56 /* Local prototypes */
58 #ifdef ACPI_ASL_COMPILER
59 #include <contrib/dev/acpica/include/acdisasm.h>
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);
118 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_REGION,
119 ACPI_IMODE_LOAD_PASS1, ACPI_NS_SEARCH_PARENT, WalkState, Node);
120 if (ACPI_FAILURE (Status))
125 /* Must create and install a region object for the new node */
127 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_REGION);
130 return (AE_NO_MEMORY);
133 ObjDesc->Region.Node = *Node;
134 Status = AcpiNsAttachObject (*Node, ObjDesc, ACPI_TYPE_REGION);
140 /*******************************************************************************
142 * FUNCTION: AcpiDsCreateBufferField
144 * PARAMETERS: Op - Current parse op (CreateXXField)
145 * WalkState - Current state
149 * DESCRIPTION: Execute the CreateField operators:
153 * CreateDwordFieldOp,
154 * CreateQwordFieldOp,
155 * CreateFieldOp (all of which define a field in a buffer)
157 ******************************************************************************/
160 AcpiDsCreateBufferField (
161 ACPI_PARSE_OBJECT *Op,
162 ACPI_WALK_STATE *WalkState)
164 ACPI_PARSE_OBJECT *Arg;
165 ACPI_NAMESPACE_NODE *Node;
167 ACPI_OPERAND_OBJECT *ObjDesc;
168 ACPI_OPERAND_OBJECT *SecondDesc = NULL;
172 ACPI_FUNCTION_TRACE (DsCreateBufferField);
176 * Get the NameString argument (name of the new BufferField)
178 if (Op->Common.AmlOpcode == AML_CREATE_FIELD_OP)
180 /* For CreateField, name is the 4th argument */
182 Arg = AcpiPsGetArg (Op, 3);
186 /* For all other CreateXXXField operators, name is the 3rd argument */
188 Arg = AcpiPsGetArg (Op, 2);
193 return_ACPI_STATUS (AE_AML_NO_OPERAND);
196 if (WalkState->DeferredNode)
198 Node = WalkState->DeferredNode;
203 /* Execute flag should always be set when this function is entered */
205 if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE))
207 return_ACPI_STATUS (AE_AML_INTERNAL);
210 /* Creating new namespace node, should not already exist */
212 Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
213 ACPI_NS_ERROR_IF_FOUND;
216 * Mark node temporary if we are executing a normal control
217 * method. (Don't mark if this is a module-level code method)
219 if (WalkState->MethodNode &&
220 !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL))
222 Flags |= ACPI_NS_TEMPORARY;
225 /* Enter the NameString into the namespace */
227 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
228 ACPI_TYPE_ANY, ACPI_IMODE_LOAD_PASS1,
229 Flags, WalkState, &Node);
230 if (ACPI_FAILURE (Status))
232 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status);
233 return_ACPI_STATUS (Status);
238 * We could put the returned object (Node) on the object stack for later,
239 * but for now, we will put it in the "op" object that the parser uses,
240 * so we can get it again at the end of this scope.
242 Op->Common.Node = Node;
245 * If there is no object attached to the node, this node was just created
246 * and we need to create the field object. Otherwise, this was a lookup
247 * of an existing node and we don't want to create the field object again.
249 ObjDesc = AcpiNsGetAttachedObject (Node);
252 return_ACPI_STATUS (AE_OK);
256 * The Field definition is not fully parsed at this time.
257 * (We must save the address of the AML for the buffer and index operands)
260 /* Create the buffer field object */
262 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER_FIELD);
265 Status = AE_NO_MEMORY;
270 * Remember location in AML stream of the field unit opcode and operands --
271 * since the buffer and index operands must be evaluated.
273 SecondDesc = ObjDesc->Common.NextObject;
274 SecondDesc->Extra.AmlStart = Op->Named.Data;
275 SecondDesc->Extra.AmlLength = Op->Named.Length;
276 ObjDesc->BufferField.Node = Node;
278 /* Attach constructed field descriptors to parent node */
280 Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_BUFFER_FIELD);
281 if (ACPI_FAILURE (Status))
289 /* Remove local reference to the object */
291 AcpiUtRemoveReference (ObjDesc);
292 return_ACPI_STATUS (Status);
296 /*******************************************************************************
298 * FUNCTION: AcpiDsGetFieldNames
300 * PARAMETERS: Info - CreateField info structure
301 * ` WalkState - Current method state
302 * Arg - First parser arg for the field name list
306 * DESCRIPTION: Process all named fields in a field declaration. Names are
307 * entered into the namespace.
309 ******************************************************************************/
312 AcpiDsGetFieldNames (
313 ACPI_CREATE_FIELD_INFO *Info,
314 ACPI_WALK_STATE *WalkState,
315 ACPI_PARSE_OBJECT *Arg)
319 ACPI_PARSE_OBJECT *Child;
322 ACPI_FUNCTION_TRACE_PTR (DsGetFieldNames, Info);
325 /* First field starts at bit zero */
327 Info->FieldBitPosition = 0;
329 /* Process all elements in the field list (of parse nodes) */
334 * Four types of field elements are handled:
335 * 1) Name - Enters a new named field into the namespace
336 * 2) Offset - specifies a bit offset
337 * 3) AccessAs - changes the access mode/attributes
338 * 4) Connection - Associate a resource template with the field
340 switch (Arg->Common.AmlOpcode)
342 case AML_INT_RESERVEDFIELD_OP:
344 Position = (UINT64) Info->FieldBitPosition
345 + (UINT64) Arg->Common.Value.Size;
347 if (Position > ACPI_UINT32_MAX)
349 ACPI_ERROR ((AE_INFO,
350 "Bit offset within field too large (> 0xFFFFFFFF)"));
351 return_ACPI_STATUS (AE_SUPPORT);
354 Info->FieldBitPosition = (UINT32) Position;
357 case AML_INT_ACCESSFIELD_OP:
358 case AML_INT_EXTACCESSFIELD_OP:
360 * Get new AccessType, AccessAttribute, and AccessLength fields
361 * -- to be used for all field units that follow, until the
362 * end-of-field or another AccessAs keyword is encountered.
363 * NOTE. These three bytes are encoded in the integer value
364 * of the parseop for convenience.
366 * In FieldFlags, preserve the flag bits other than the
370 /* AccessType (ByteAcc, WordAcc, etc.) */
372 Info->FieldFlags = (UINT8)
373 ((Info->FieldFlags & ~(AML_FIELD_ACCESS_TYPE_MASK)) |
374 ((UINT8) ((UINT32) (Arg->Common.Value.Integer & 0x07))));
376 /* AccessAttribute (AttribQuick, AttribByte, etc.) */
378 Info->Attribute = (UINT8) ((Arg->Common.Value.Integer >> 8) & 0xFF);
380 /* AccessLength (for serial/buffer protocols) */
382 Info->AccessLength = (UINT8) ((Arg->Common.Value.Integer >> 16) & 0xFF);
385 case AML_INT_CONNECTION_OP:
387 * Clear any previous connection. New connection is used for all
388 * fields that follow, similar to AccessAs
390 Info->ResourceBuffer = NULL;
391 Info->ConnectionNode = NULL;
392 Info->PinNumberIndex = 0;
395 * A Connection() is either an actual resource descriptor (buffer)
396 * or a named reference to a resource template
398 Child = Arg->Common.Value.Arg;
399 if (Child->Common.AmlOpcode == AML_INT_BYTELIST_OP)
401 Info->ResourceBuffer = Child->Named.Data;
402 Info->ResourceLength = (UINT16) Child->Named.Value.Integer;
406 /* Lookup the Connection() namepath, it should already exist */
408 Status = AcpiNsLookup (WalkState->ScopeInfo,
409 Child->Common.Value.Name, ACPI_TYPE_ANY,
410 ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE,
411 WalkState, &Info->ConnectionNode);
412 if (ACPI_FAILURE (Status))
414 ACPI_ERROR_NAMESPACE (Child->Common.Value.Name, Status);
415 return_ACPI_STATUS (Status);
420 case AML_INT_NAMEDFIELD_OP:
422 /* Lookup the name, it should already exist */
424 Status = AcpiNsLookup (WalkState->ScopeInfo,
425 (char *) &Arg->Named.Name, Info->FieldType,
426 ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE,
427 WalkState, &Info->FieldNode);
428 if (ACPI_FAILURE (Status))
430 ACPI_ERROR_NAMESPACE ((char *) &Arg->Named.Name, Status);
431 return_ACPI_STATUS (Status);
435 Arg->Common.Node = Info->FieldNode;
436 Info->FieldBitLength = Arg->Common.Value.Size;
439 * If there is no object attached to the node, this node was
440 * just created and we need to create the field object.
441 * Otherwise, this was a lookup of an existing node and we
442 * don't want to create the field object again.
444 if (!AcpiNsGetAttachedObject (Info->FieldNode))
446 Status = AcpiExPrepFieldValue (Info);
447 if (ACPI_FAILURE (Status))
449 return_ACPI_STATUS (Status);
454 /* Keep track of bit position for the next field */
456 Position = (UINT64) Info->FieldBitPosition
457 + (UINT64) Arg->Common.Value.Size;
459 if (Position > ACPI_UINT32_MAX)
461 ACPI_ERROR ((AE_INFO,
462 "Field [%4.4s] bit offset too large (> 0xFFFFFFFF)",
463 ACPI_CAST_PTR (char, &Info->FieldNode->Name)));
464 return_ACPI_STATUS (AE_SUPPORT);
467 Info->FieldBitPosition += Info->FieldBitLength;
468 Info->PinNumberIndex++; /* Index relative to previous Connection() */
473 ACPI_ERROR ((AE_INFO,
474 "Invalid opcode in field list: 0x%X", Arg->Common.AmlOpcode));
475 return_ACPI_STATUS (AE_AML_BAD_OPCODE);
478 Arg = Arg->Common.Next;
481 return_ACPI_STATUS (AE_OK);
485 /*******************************************************************************
487 * FUNCTION: AcpiDsCreateField
489 * PARAMETERS: Op - Op containing the Field definition and args
490 * RegionNode - Object for the containing Operation Region
491 * ` WalkState - Current method state
495 * DESCRIPTION: Create a new field in the specified operation region
497 ******************************************************************************/
501 ACPI_PARSE_OBJECT *Op,
502 ACPI_NAMESPACE_NODE *RegionNode,
503 ACPI_WALK_STATE *WalkState)
506 ACPI_PARSE_OBJECT *Arg;
507 ACPI_CREATE_FIELD_INFO Info;
510 ACPI_FUNCTION_TRACE_PTR (DsCreateField, Op);
513 /* First arg is the name of the parent OpRegion (must already exist) */
515 Arg = Op->Common.Value.Arg;
519 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name,
520 ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE,
521 ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode);
522 #ifdef ACPI_ASL_COMPILER
523 Status = AcpiDsCreateExternalRegion (Status, Arg,
524 Arg->Common.Value.Name, WalkState, &RegionNode);
526 if (ACPI_FAILURE (Status))
528 ACPI_ERROR_NAMESPACE (Arg->Common.Value.Name, Status);
529 return_ACPI_STATUS (Status);
533 ACPI_MEMSET (&Info, 0, sizeof (ACPI_CREATE_FIELD_INFO));
535 /* Second arg is the field flags */
537 Arg = Arg->Common.Next;
538 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer;
541 /* Each remaining arg is a Named Field */
543 Info.FieldType = ACPI_TYPE_LOCAL_REGION_FIELD;
544 Info.RegionNode = RegionNode;
546 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next);
547 return_ACPI_STATUS (Status);
551 /*******************************************************************************
553 * FUNCTION: AcpiDsInitFieldObjects
555 * PARAMETERS: Op - Op containing the Field definition and args
556 * ` WalkState - Current method state
560 * DESCRIPTION: For each "Field Unit" name in the argument list that is
561 * part of the field declaration, enter the name into the
564 ******************************************************************************/
567 AcpiDsInitFieldObjects (
568 ACPI_PARSE_OBJECT *Op,
569 ACPI_WALK_STATE *WalkState)
572 ACPI_PARSE_OBJECT *Arg = NULL;
573 ACPI_NAMESPACE_NODE *Node;
578 ACPI_FUNCTION_TRACE_PTR (DsInitFieldObjects, Op);
581 /* Execute flag should always be set when this function is entered */
583 if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE))
585 if (WalkState->ParseFlags & ACPI_PARSE_DEFERRED_OP)
587 /* BankField Op is deferred, just return OK */
589 return_ACPI_STATUS (AE_OK);
592 return_ACPI_STATUS (AE_AML_INTERNAL);
596 * Get the FieldList argument for this opcode. This is the start of the
597 * list of field elements.
599 switch (WalkState->Opcode)
603 Arg = AcpiPsGetArg (Op, 2);
604 Type = ACPI_TYPE_LOCAL_REGION_FIELD;
607 case AML_BANK_FIELD_OP:
609 Arg = AcpiPsGetArg (Op, 4);
610 Type = ACPI_TYPE_LOCAL_BANK_FIELD;
613 case AML_INDEX_FIELD_OP:
615 Arg = AcpiPsGetArg (Op, 3);
616 Type = ACPI_TYPE_LOCAL_INDEX_FIELD;
621 return_ACPI_STATUS (AE_BAD_PARAMETER);
624 /* Creating new namespace node(s), should not already exist */
626 Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
627 ACPI_NS_ERROR_IF_FOUND;
630 * Mark node(s) temporary if we are executing a normal control
631 * method. (Don't mark if this is a module-level code method)
633 if (WalkState->MethodNode &&
634 !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL))
636 Flags |= ACPI_NS_TEMPORARY;
640 * Walk the list of entries in the FieldList
641 * Note: FieldList can be of zero length. In this case, Arg will be NULL.
646 * Ignore OFFSET/ACCESSAS/CONNECTION terms here; we are only interested
647 * in the field names in order to enter them into the namespace.
649 if (Arg->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP)
651 Status = AcpiNsLookup (WalkState->ScopeInfo,
652 (char *) &Arg->Named.Name, Type, ACPI_IMODE_LOAD_PASS1,
653 Flags, WalkState, &Node);
654 if (ACPI_FAILURE (Status))
656 ACPI_ERROR_NAMESPACE ((char *) &Arg->Named.Name, Status);
657 if (Status != AE_ALREADY_EXISTS)
659 return_ACPI_STATUS (Status);
662 /* Name already exists, just ignore this error */
667 Arg->Common.Node = Node;
670 /* Get the next field element in the list */
672 Arg = Arg->Common.Next;
675 return_ACPI_STATUS (AE_OK);
679 /*******************************************************************************
681 * FUNCTION: AcpiDsCreateBankField
683 * PARAMETERS: Op - Op containing the Field definition and args
684 * RegionNode - Object for the containing Operation Region
685 * WalkState - Current method state
689 * DESCRIPTION: Create a new bank field in the specified operation region
691 ******************************************************************************/
694 AcpiDsCreateBankField (
695 ACPI_PARSE_OBJECT *Op,
696 ACPI_NAMESPACE_NODE *RegionNode,
697 ACPI_WALK_STATE *WalkState)
700 ACPI_PARSE_OBJECT *Arg;
701 ACPI_CREATE_FIELD_INFO Info;
704 ACPI_FUNCTION_TRACE_PTR (DsCreateBankField, Op);
707 /* First arg is the name of the parent OpRegion (must already exist) */
709 Arg = Op->Common.Value.Arg;
712 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name,
713 ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE,
714 ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode);
715 #ifdef ACPI_ASL_COMPILER
716 Status = AcpiDsCreateExternalRegion (Status, Arg,
717 Arg->Common.Value.Name, WalkState, &RegionNode);
719 if (ACPI_FAILURE (Status))
721 ACPI_ERROR_NAMESPACE (Arg->Common.Value.Name, Status);
722 return_ACPI_STATUS (Status);
726 /* Second arg is the Bank Register (Field) (must already exist) */
728 Arg = Arg->Common.Next;
729 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
730 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
731 ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode);
732 if (ACPI_FAILURE (Status))
734 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status);
735 return_ACPI_STATUS (Status);
739 * Third arg is the BankValue
740 * This arg is a TermArg, not a constant
741 * It will be evaluated later, by AcpiDsEvalBankFieldOperands
743 Arg = Arg->Common.Next;
745 /* Fourth arg is the field flags */
747 Arg = Arg->Common.Next;
748 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer;
750 /* Each remaining arg is a Named Field */
752 Info.FieldType = ACPI_TYPE_LOCAL_BANK_FIELD;
753 Info.RegionNode = RegionNode;
756 * Use Info.DataRegisterNode to store BankField Op
757 * It's safe because DataRegisterNode will never be used when create bank field
758 * We store AmlStart and AmlLength in the BankField Op for late evaluation
759 * Used in AcpiExPrepFieldValue(Info)
761 * TBD: Or, should we add a field in ACPI_CREATE_FIELD_INFO, like "void *ParentOp"?
763 Info.DataRegisterNode = (ACPI_NAMESPACE_NODE*) Op;
765 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next);
766 return_ACPI_STATUS (Status);
770 /*******************************************************************************
772 * FUNCTION: AcpiDsCreateIndexField
774 * PARAMETERS: Op - Op containing the Field definition and args
775 * RegionNode - Object for the containing Operation Region
776 * ` WalkState - Current method state
780 * DESCRIPTION: Create a new index field in the specified operation region
782 ******************************************************************************/
785 AcpiDsCreateIndexField (
786 ACPI_PARSE_OBJECT *Op,
787 ACPI_NAMESPACE_NODE *RegionNode,
788 ACPI_WALK_STATE *WalkState)
791 ACPI_PARSE_OBJECT *Arg;
792 ACPI_CREATE_FIELD_INFO Info;
795 ACPI_FUNCTION_TRACE_PTR (DsCreateIndexField, Op);
798 /* First arg is the name of the Index register (must already exist) */
800 Arg = Op->Common.Value.Arg;
801 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
802 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
803 ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode);
804 if (ACPI_FAILURE (Status))
806 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status);
807 return_ACPI_STATUS (Status);
810 /* Second arg is the data register (must already exist) */
812 Arg = Arg->Common.Next;
813 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
814 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
815 ACPI_NS_SEARCH_PARENT, WalkState, &Info.DataRegisterNode);
816 if (ACPI_FAILURE (Status))
818 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status);
819 return_ACPI_STATUS (Status);
822 /* Next arg is the field flags */
824 Arg = Arg->Common.Next;
825 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer;
827 /* Each remaining arg is a Named Field */
829 Info.FieldType = ACPI_TYPE_LOCAL_INDEX_FIELD;
830 Info.RegionNode = RegionNode;
832 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next);
833 return_ACPI_STATUS (Status);