1 /******************************************************************************
3 * Module Name: dsfield - Dispatcher field routines
5 *****************************************************************************/
7 /******************************************************************************
11 * Some or all of this work - Copyright (c) 1999 - 2017, Intel Corp.
12 * All rights reserved.
16 * 2.1. This is your license from Intel Corp. under its intellectual property
17 * rights. You may have additional license terms from the party that provided
18 * you this software, covering your right to use that party's intellectual
21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22 * copy of the source code appearing in this file ("Covered Code") an
23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24 * base code distributed originally by Intel ("Original Intel Code") to copy,
25 * make derivatives, distribute, use and display any portion of the Covered
26 * Code in any form, with the right to sublicense such rights; and
28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29 * license (with the right to sublicense), under only those claims of Intel
30 * patents that are infringed by the Original Intel Code, to make, use, sell,
31 * offer to sell, and import the Covered Code and derivative works thereof
32 * solely to the minimum extent necessary to exercise the above copyright
33 * license, and in no event shall the patent license extend to any additions
34 * to or modifications of the Original Intel Code. No other license or right
35 * is granted directly or by implication, estoppel or otherwise;
37 * The above copyright and patent license is granted only if the following
42 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43 * Redistribution of source code of any substantial portion of the Covered
44 * Code or modification with rights to further distribute source must include
45 * the above Copyright Notice, the above License, this list of Conditions,
46 * and the following Disclaimer and Export Compliance provision. In addition,
47 * Licensee must cause all Covered Code to which Licensee contributes to
48 * contain a file documenting the changes Licensee made to create that Covered
49 * Code and the date of any change. Licensee must include in that file the
50 * documentation of any changes made by any predecessor Licensee. Licensee
51 * must include a prominent statement that the modification is derived,
52 * directly or indirectly, from Original Intel Code.
54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55 * Redistribution of source code of any substantial portion of the Covered
56 * Code or modification without rights to further distribute source must
57 * include the following Disclaimer and Export Compliance provision in the
58 * documentation and/or other materials provided with distribution. In
59 * addition, Licensee may not authorize further sublicense of source of any
60 * portion of the Covered Code, and must include terms to the effect that the
61 * license from Licensee to its licensee is limited to the intellectual
62 * property embodied in the software Licensee provides to its licensee, and
63 * not to intellectual property embodied in modifications its licensee may
66 * 3.3. Redistribution of Executable. Redistribution in executable form of any
67 * substantial portion of the Covered Code or modification must reproduce the
68 * above Copyright Notice, and the following Disclaimer and Export Compliance
69 * provision in the documentation and/or other materials provided with the
72 * 3.4. Intel retains all right, title, and interest in and to the Original
75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76 * Intel shall be used in advertising or otherwise to promote the sale, use or
77 * other dealings in products derived from or relating to the Covered Code
78 * without prior written authorization from Intel.
80 * 4. Disclaimer and Export Compliance
82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
99 * 4.3. Licensee shall not export, either directly or indirectly, any of this
100 * software or system incorporating such software without first obtaining any
101 * required license or other approval from the U. S. Department of Commerce or
102 * any other agency or department of the United States Government. In the
103 * event Licensee exports any such software from the United States or
104 * re-exports any such software from a foreign destination, Licensee shall
105 * ensure that the distribution and export/re-export of the software is in
106 * compliance with all laws, regulations, orders, or other restrictions of the
107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108 * any of its subsidiaries will export/re-export any technical data, process,
109 * software, or service, directly or indirectly, to any country for which the
110 * United States government or any agency thereof requires an export license,
111 * other governmental approval, or letter of assurance, without first obtaining
112 * such license, approval or letter.
114 *****************************************************************************
116 * Alternatively, you may choose to be licensed under the terms of the
119 * Redistribution and use in source and binary forms, with or without
120 * modification, are permitted provided that the following conditions
122 * 1. Redistributions of source code must retain the above copyright
123 * notice, this list of conditions, and the following disclaimer,
124 * without modification.
125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
126 * substantially similar to the "NO WARRANTY" disclaimer below
127 * ("Disclaimer") and any redistribution must be conditioned upon
128 * including a substantially similar Disclaimer requirement for further
129 * binary redistribution.
130 * 3. Neither the names of the above-listed copyright holders nor the names
131 * of any contributors may be used to endorse or promote products derived
132 * from this software without specific prior written permission.
134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
146 * Alternatively, you may choose to be licensed under the terms of the
147 * GNU General Public License ("GPL") version 2 as published by the Free
148 * Software Foundation.
150 *****************************************************************************/
153 #include "accommon.h"
155 #include "acdispat.h"
156 #include "acinterp.h"
157 #include "acnamesp.h"
158 #include "acparser.h"
161 #define _COMPONENT ACPI_DISPATCHER
162 ACPI_MODULE_NAME ("dsfield")
164 /* Local prototypes */
166 #ifdef ACPI_ASL_COMPILER
167 #include "acdisasm.h"
170 AcpiDsCreateExternalRegion (
171 ACPI_STATUS LookupStatus,
172 ACPI_PARSE_OBJECT *Op,
174 ACPI_WALK_STATE *WalkState,
175 ACPI_NAMESPACE_NODE **Node);
179 AcpiDsGetFieldNames (
180 ACPI_CREATE_FIELD_INFO *Info,
181 ACPI_WALK_STATE *WalkState,
182 ACPI_PARSE_OBJECT *Arg);
185 #ifdef ACPI_ASL_COMPILER
186 /*******************************************************************************
188 * FUNCTION: AcpiDsCreateExternalRegion (iASL Disassembler only)
190 * PARAMETERS: LookupStatus - Status from NsLookup operation
191 * Op - Op containing the Field definition and args
192 * Path - Pathname of the region
193 * ` WalkState - Current method state
194 * Node - Where the new region node is returned
198 * DESCRIPTION: Add region to the external list if NOT_FOUND. Create a new
199 * region node/object.
201 ******************************************************************************/
204 AcpiDsCreateExternalRegion (
205 ACPI_STATUS LookupStatus,
206 ACPI_PARSE_OBJECT *Op,
208 ACPI_WALK_STATE *WalkState,
209 ACPI_NAMESPACE_NODE **Node)
212 ACPI_OPERAND_OBJECT *ObjDesc;
215 if (LookupStatus != AE_NOT_FOUND)
217 return (LookupStatus);
222 * OperationRegion not found. Generate an External for it, and
223 * insert the name into the namespace.
225 AcpiDmAddOpToExternalList (Op, Path, ACPI_TYPE_REGION, 0, 0);
227 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_REGION,
228 ACPI_IMODE_LOAD_PASS1, ACPI_NS_SEARCH_PARENT, WalkState, Node);
229 if (ACPI_FAILURE (Status))
234 /* Must create and install a region object for the new node */
236 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_REGION);
239 return (AE_NO_MEMORY);
242 ObjDesc->Region.Node = *Node;
243 Status = AcpiNsAttachObject (*Node, ObjDesc, ACPI_TYPE_REGION);
249 /*******************************************************************************
251 * FUNCTION: AcpiDsCreateBufferField
253 * PARAMETERS: Op - Current parse op (CreateXXField)
254 * WalkState - Current state
258 * DESCRIPTION: Execute the CreateField operators:
262 * CreateDwordFieldOp,
263 * CreateQwordFieldOp,
264 * CreateFieldOp (all of which define a field in a buffer)
266 ******************************************************************************/
269 AcpiDsCreateBufferField (
270 ACPI_PARSE_OBJECT *Op,
271 ACPI_WALK_STATE *WalkState)
273 ACPI_PARSE_OBJECT *Arg;
274 ACPI_NAMESPACE_NODE *Node;
276 ACPI_OPERAND_OBJECT *ObjDesc;
277 ACPI_OPERAND_OBJECT *SecondDesc = NULL;
281 ACPI_FUNCTION_TRACE (DsCreateBufferField);
285 * Get the NameString argument (name of the new BufferField)
287 if (Op->Common.AmlOpcode == AML_CREATE_FIELD_OP)
289 /* For CreateField, name is the 4th argument */
291 Arg = AcpiPsGetArg (Op, 3);
295 /* For all other CreateXXXField operators, name is the 3rd argument */
297 Arg = AcpiPsGetArg (Op, 2);
302 return_ACPI_STATUS (AE_AML_NO_OPERAND);
305 if (WalkState->DeferredNode)
307 Node = WalkState->DeferredNode;
312 /* Execute flag should always be set when this function is entered */
314 if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE))
316 ACPI_ERROR ((AE_INFO,
317 "Parse execute mode is not set"));
318 return_ACPI_STATUS (AE_AML_INTERNAL);
321 /* Creating new namespace node, should not already exist */
323 Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
324 ACPI_NS_ERROR_IF_FOUND;
327 * Mark node temporary if we are executing a normal control
328 * method. (Don't mark if this is a module-level code method)
330 if (WalkState->MethodNode &&
331 !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL))
333 Flags |= ACPI_NS_TEMPORARY;
336 /* Enter the NameString into the namespace */
338 Status = AcpiNsLookup (WalkState->ScopeInfo,
339 Arg->Common.Value.String, ACPI_TYPE_ANY,
340 ACPI_IMODE_LOAD_PASS1, Flags, WalkState, &Node);
341 if (ACPI_FAILURE (Status))
343 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status);
344 return_ACPI_STATUS (Status);
349 * We could put the returned object (Node) on the object stack for later,
350 * but for now, we will put it in the "op" object that the parser uses,
351 * so we can get it again at the end of this scope.
353 Op->Common.Node = Node;
356 * If there is no object attached to the node, this node was just created
357 * and we need to create the field object. Otherwise, this was a lookup
358 * of an existing node and we don't want to create the field object again.
360 ObjDesc = AcpiNsGetAttachedObject (Node);
363 return_ACPI_STATUS (AE_OK);
367 * The Field definition is not fully parsed at this time.
368 * (We must save the address of the AML for the buffer and index operands)
371 /* Create the buffer field object */
373 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER_FIELD);
376 Status = AE_NO_MEMORY;
381 * Remember location in AML stream of the field unit opcode and operands
382 * -- since the buffer and index operands must be evaluated.
384 SecondDesc = ObjDesc->Common.NextObject;
385 SecondDesc->Extra.AmlStart = Op->Named.Data;
386 SecondDesc->Extra.AmlLength = Op->Named.Length;
387 ObjDesc->BufferField.Node = Node;
389 /* Attach constructed field descriptors to parent node */
391 Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_BUFFER_FIELD);
392 if (ACPI_FAILURE (Status))
400 /* Remove local reference to the object */
402 AcpiUtRemoveReference (ObjDesc);
403 return_ACPI_STATUS (Status);
407 /*******************************************************************************
409 * FUNCTION: AcpiDsGetFieldNames
411 * PARAMETERS: Info - CreateField info structure
412 * ` WalkState - Current method state
413 * Arg - First parser arg for the field name list
417 * DESCRIPTION: Process all named fields in a field declaration. Names are
418 * entered into the namespace.
420 ******************************************************************************/
423 AcpiDsGetFieldNames (
424 ACPI_CREATE_FIELD_INFO *Info,
425 ACPI_WALK_STATE *WalkState,
426 ACPI_PARSE_OBJECT *Arg)
430 ACPI_PARSE_OBJECT *Child;
433 ACPI_FUNCTION_TRACE_PTR (DsGetFieldNames, Info);
436 /* First field starts at bit zero */
438 Info->FieldBitPosition = 0;
440 /* Process all elements in the field list (of parse nodes) */
445 * Four types of field elements are handled:
446 * 1) Name - Enters a new named field into the namespace
447 * 2) Offset - specifies a bit offset
448 * 3) AccessAs - changes the access mode/attributes
449 * 4) Connection - Associate a resource template with the field
451 switch (Arg->Common.AmlOpcode)
453 case AML_INT_RESERVEDFIELD_OP:
455 Position = (UINT64) Info->FieldBitPosition +
456 (UINT64) Arg->Common.Value.Size;
458 if (Position > ACPI_UINT32_MAX)
460 ACPI_ERROR ((AE_INFO,
461 "Bit offset within field too large (> 0xFFFFFFFF)"));
462 return_ACPI_STATUS (AE_SUPPORT);
465 Info->FieldBitPosition = (UINT32) Position;
468 case AML_INT_ACCESSFIELD_OP:
469 case AML_INT_EXTACCESSFIELD_OP:
471 * Get new AccessType, AccessAttribute, and AccessLength fields
472 * -- to be used for all field units that follow, until the
473 * end-of-field or another AccessAs keyword is encountered.
474 * NOTE. These three bytes are encoded in the integer value
475 * of the parseop for convenience.
477 * In FieldFlags, preserve the flag bits other than the
481 /* AccessType (ByteAcc, WordAcc, etc.) */
483 Info->FieldFlags = (UINT8)
484 ((Info->FieldFlags & ~(AML_FIELD_ACCESS_TYPE_MASK)) |
485 ((UINT8) ((UINT32) (Arg->Common.Value.Integer & 0x07))));
487 /* AccessAttribute (AttribQuick, AttribByte, etc.) */
489 Info->Attribute = (UINT8)
490 ((Arg->Common.Value.Integer >> 8) & 0xFF);
492 /* AccessLength (for serial/buffer protocols) */
494 Info->AccessLength = (UINT8)
495 ((Arg->Common.Value.Integer >> 16) & 0xFF);
498 case AML_INT_CONNECTION_OP:
500 * Clear any previous connection. New connection is used for all
501 * fields that follow, similar to AccessAs
503 Info->ResourceBuffer = NULL;
504 Info->ConnectionNode = NULL;
505 Info->PinNumberIndex = 0;
508 * A Connection() is either an actual resource descriptor (buffer)
509 * or a named reference to a resource template
511 Child = Arg->Common.Value.Arg;
512 if (Child->Common.AmlOpcode == AML_INT_BYTELIST_OP)
514 Info->ResourceBuffer = Child->Named.Data;
515 Info->ResourceLength = (UINT16) Child->Named.Value.Integer;
519 /* Lookup the Connection() namepath, it should already exist */
521 Status = AcpiNsLookup (WalkState->ScopeInfo,
522 Child->Common.Value.Name, ACPI_TYPE_ANY,
523 ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE,
524 WalkState, &Info->ConnectionNode);
525 if (ACPI_FAILURE (Status))
527 ACPI_ERROR_NAMESPACE (Child->Common.Value.Name, Status);
528 return_ACPI_STATUS (Status);
533 case AML_INT_NAMEDFIELD_OP:
535 /* Lookup the name, it should already exist */
537 Status = AcpiNsLookup (WalkState->ScopeInfo,
538 (char *) &Arg->Named.Name, Info->FieldType,
539 ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE,
540 WalkState, &Info->FieldNode);
541 if (ACPI_FAILURE (Status))
543 ACPI_ERROR_NAMESPACE ((char *) &Arg->Named.Name, Status);
544 return_ACPI_STATUS (Status);
548 Arg->Common.Node = Info->FieldNode;
549 Info->FieldBitLength = Arg->Common.Value.Size;
552 * If there is no object attached to the node, this node was
553 * just created and we need to create the field object.
554 * Otherwise, this was a lookup of an existing node and we
555 * don't want to create the field object again.
557 if (!AcpiNsGetAttachedObject (Info->FieldNode))
559 Status = AcpiExPrepFieldValue (Info);
560 if (ACPI_FAILURE (Status))
562 return_ACPI_STATUS (Status);
567 /* Keep track of bit position for the next field */
569 Position = (UINT64) Info->FieldBitPosition +
570 (UINT64) Arg->Common.Value.Size;
572 if (Position > ACPI_UINT32_MAX)
574 ACPI_ERROR ((AE_INFO,
575 "Field [%4.4s] bit offset too large (> 0xFFFFFFFF)",
576 ACPI_CAST_PTR (char, &Info->FieldNode->Name)));
577 return_ACPI_STATUS (AE_SUPPORT);
580 Info->FieldBitPosition += Info->FieldBitLength;
581 Info->PinNumberIndex++; /* Index relative to previous Connection() */
586 ACPI_ERROR ((AE_INFO,
587 "Invalid opcode in field list: 0x%X",
588 Arg->Common.AmlOpcode));
589 return_ACPI_STATUS (AE_AML_BAD_OPCODE);
592 Arg = Arg->Common.Next;
595 return_ACPI_STATUS (AE_OK);
599 /*******************************************************************************
601 * FUNCTION: AcpiDsCreateField
603 * PARAMETERS: Op - Op containing the Field definition and args
604 * RegionNode - Object for the containing Operation Region
605 * ` WalkState - Current method state
609 * DESCRIPTION: Create a new field in the specified operation region
611 ******************************************************************************/
615 ACPI_PARSE_OBJECT *Op,
616 ACPI_NAMESPACE_NODE *RegionNode,
617 ACPI_WALK_STATE *WalkState)
620 ACPI_PARSE_OBJECT *Arg;
621 ACPI_CREATE_FIELD_INFO Info;
624 ACPI_FUNCTION_TRACE_PTR (DsCreateField, Op);
627 /* First arg is the name of the parent OpRegion (must already exist) */
629 Arg = Op->Common.Value.Arg;
633 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name,
634 ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE,
635 ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode);
636 #ifdef ACPI_ASL_COMPILER
637 Status = AcpiDsCreateExternalRegion (Status, Arg,
638 Arg->Common.Value.Name, WalkState, &RegionNode);
640 if (ACPI_FAILURE (Status))
642 ACPI_ERROR_NAMESPACE (Arg->Common.Value.Name, Status);
643 return_ACPI_STATUS (Status);
647 memset (&Info, 0, sizeof (ACPI_CREATE_FIELD_INFO));
649 /* Second arg is the field flags */
651 Arg = Arg->Common.Next;
652 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer;
655 /* Each remaining arg is a Named Field */
657 Info.FieldType = ACPI_TYPE_LOCAL_REGION_FIELD;
658 Info.RegionNode = RegionNode;
660 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next);
661 return_ACPI_STATUS (Status);
665 /*******************************************************************************
667 * FUNCTION: AcpiDsInitFieldObjects
669 * PARAMETERS: Op - Op containing the Field definition and args
670 * ` WalkState - Current method state
674 * DESCRIPTION: For each "Field Unit" name in the argument list that is
675 * part of the field declaration, enter the name into the
678 ******************************************************************************/
681 AcpiDsInitFieldObjects (
682 ACPI_PARSE_OBJECT *Op,
683 ACPI_WALK_STATE *WalkState)
686 ACPI_PARSE_OBJECT *Arg = NULL;
687 ACPI_NAMESPACE_NODE *Node;
692 ACPI_FUNCTION_TRACE_PTR (DsInitFieldObjects, Op);
695 /* Execute flag should always be set when this function is entered */
697 if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE))
699 if (WalkState->ParseFlags & ACPI_PARSE_DEFERRED_OP)
701 /* BankField Op is deferred, just return OK */
703 return_ACPI_STATUS (AE_OK);
706 ACPI_ERROR ((AE_INFO,
707 "Parse deferred mode is not set"));
708 return_ACPI_STATUS (AE_AML_INTERNAL);
712 * Get the FieldList argument for this opcode. This is the start of the
713 * list of field elements.
715 switch (WalkState->Opcode)
719 Arg = AcpiPsGetArg (Op, 2);
720 Type = ACPI_TYPE_LOCAL_REGION_FIELD;
723 case AML_BANK_FIELD_OP:
725 Arg = AcpiPsGetArg (Op, 4);
726 Type = ACPI_TYPE_LOCAL_BANK_FIELD;
729 case AML_INDEX_FIELD_OP:
731 Arg = AcpiPsGetArg (Op, 3);
732 Type = ACPI_TYPE_LOCAL_INDEX_FIELD;
737 return_ACPI_STATUS (AE_BAD_PARAMETER);
740 /* Creating new namespace node(s), should not already exist */
742 Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
743 ACPI_NS_ERROR_IF_FOUND;
746 * Mark node(s) temporary if we are executing a normal control
747 * method. (Don't mark if this is a module-level code method)
749 if (WalkState->MethodNode &&
750 !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL))
752 Flags |= ACPI_NS_TEMPORARY;
756 * Walk the list of entries in the FieldList
757 * Note: FieldList can be of zero length. In this case, Arg will be NULL.
762 * Ignore OFFSET/ACCESSAS/CONNECTION terms here; we are only interested
763 * in the field names in order to enter them into the namespace.
765 if (Arg->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP)
767 Status = AcpiNsLookup (WalkState->ScopeInfo,
768 (char *) &Arg->Named.Name, Type, ACPI_IMODE_LOAD_PASS1,
769 Flags, WalkState, &Node);
770 if (ACPI_FAILURE (Status))
772 ACPI_ERROR_NAMESPACE ((char *) &Arg->Named.Name, Status);
773 if (Status != AE_ALREADY_EXISTS)
775 return_ACPI_STATUS (Status);
778 /* Name already exists, just ignore this error */
783 Arg->Common.Node = Node;
786 /* Get the next field element in the list */
788 Arg = Arg->Common.Next;
791 return_ACPI_STATUS (AE_OK);
795 /*******************************************************************************
797 * FUNCTION: AcpiDsCreateBankField
799 * PARAMETERS: Op - Op containing the Field definition and args
800 * RegionNode - Object for the containing Operation Region
801 * WalkState - Current method state
805 * DESCRIPTION: Create a new bank field in the specified operation region
807 ******************************************************************************/
810 AcpiDsCreateBankField (
811 ACPI_PARSE_OBJECT *Op,
812 ACPI_NAMESPACE_NODE *RegionNode,
813 ACPI_WALK_STATE *WalkState)
816 ACPI_PARSE_OBJECT *Arg;
817 ACPI_CREATE_FIELD_INFO Info;
820 ACPI_FUNCTION_TRACE_PTR (DsCreateBankField, Op);
823 /* First arg is the name of the parent OpRegion (must already exist) */
825 Arg = Op->Common.Value.Arg;
828 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name,
829 ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE,
830 ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode);
831 #ifdef ACPI_ASL_COMPILER
832 Status = AcpiDsCreateExternalRegion (Status, Arg,
833 Arg->Common.Value.Name, WalkState, &RegionNode);
835 if (ACPI_FAILURE (Status))
837 ACPI_ERROR_NAMESPACE (Arg->Common.Value.Name, Status);
838 return_ACPI_STATUS (Status);
842 /* Second arg is the Bank Register (Field) (must already exist) */
844 Arg = Arg->Common.Next;
845 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
846 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
847 ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode);
848 if (ACPI_FAILURE (Status))
850 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status);
851 return_ACPI_STATUS (Status);
855 * Third arg is the BankValue
856 * This arg is a TermArg, not a constant
857 * It will be evaluated later, by AcpiDsEvalBankFieldOperands
859 Arg = Arg->Common.Next;
861 /* Fourth arg is the field flags */
863 Arg = Arg->Common.Next;
864 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer;
866 /* Each remaining arg is a Named Field */
868 Info.FieldType = ACPI_TYPE_LOCAL_BANK_FIELD;
869 Info.RegionNode = RegionNode;
872 * Use Info.DataRegisterNode to store BankField Op
873 * It's safe because DataRegisterNode will never be used when create
874 * bank field \we store AmlStart and AmlLength in the BankField Op for
875 * late evaluation. Used in AcpiExPrepFieldValue(Info)
877 * TBD: Or, should we add a field in ACPI_CREATE_FIELD_INFO, like
880 Info.DataRegisterNode = (ACPI_NAMESPACE_NODE*) Op;
882 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next);
883 return_ACPI_STATUS (Status);
887 /*******************************************************************************
889 * FUNCTION: AcpiDsCreateIndexField
891 * PARAMETERS: Op - Op containing the Field definition and args
892 * RegionNode - Object for the containing Operation Region
893 * ` WalkState - Current method state
897 * DESCRIPTION: Create a new index field in the specified operation region
899 ******************************************************************************/
902 AcpiDsCreateIndexField (
903 ACPI_PARSE_OBJECT *Op,
904 ACPI_NAMESPACE_NODE *RegionNode,
905 ACPI_WALK_STATE *WalkState)
908 ACPI_PARSE_OBJECT *Arg;
909 ACPI_CREATE_FIELD_INFO Info;
912 ACPI_FUNCTION_TRACE_PTR (DsCreateIndexField, Op);
915 /* First arg is the name of the Index register (must already exist) */
917 Arg = Op->Common.Value.Arg;
918 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
919 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
920 ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode);
921 if (ACPI_FAILURE (Status))
923 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status);
924 return_ACPI_STATUS (Status);
927 /* Second arg is the data register (must already exist) */
929 Arg = Arg->Common.Next;
930 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
931 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
932 ACPI_NS_SEARCH_PARENT, WalkState, &Info.DataRegisterNode);
933 if (ACPI_FAILURE (Status))
935 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status);
936 return_ACPI_STATUS (Status);
939 /* Next arg is the field flags */
941 Arg = Arg->Common.Next;
942 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer;
944 /* Each remaining arg is a Named Field */
946 Info.FieldType = ACPI_TYPE_LOCAL_INDEX_FIELD;
947 Info.RegionNode = RegionNode;
949 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next);
950 return_ACPI_STATUS (Status);