xref: /freebsd/sys/contrib/dev/acpica/components/dispatcher/dswload.c (revision d3d381b2b194b4d24853e92eecef55f262688d1a)
1 /******************************************************************************
2  *
3  * Module Name: dswload - Dispatcher first pass namespace load callbacks
4  *
5  *****************************************************************************/
6 
7 /******************************************************************************
8  *
9  * 1. Copyright Notice
10  *
11  * Some or all of this work - Copyright (c) 1999 - 2018, Intel Corp.
12  * All rights reserved.
13  *
14  * 2. License
15  *
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
19  * property rights.
20  *
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
27  *
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;
36  *
37  * The above copyright and patent license is granted only if the following
38  * conditions are met:
39  *
40  * 3. Conditions
41  *
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.
53  *
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
64  * make.
65  *
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
70  * distribution.
71  *
72  * 3.4. Intel retains all right, title, and interest in and to the Original
73  * Intel Code.
74  *
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.
79  *
80  * 4. Disclaimer and Export Compliance
81  *
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
88  * PARTICULAR PURPOSE.
89  *
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
97  * LIMITED REMEDY.
98  *
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.
113  *
114  *****************************************************************************
115  *
116  * Alternatively, you may choose to be licensed under the terms of the
117  * following license:
118  *
119  * Redistribution and use in source and binary forms, with or without
120  * modification, are permitted provided that the following conditions
121  * are met:
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.
133  *
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.
145  *
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.
149  *
150  *****************************************************************************/
151 
152 #include <contrib/dev/acpica/include/acpi.h>
153 #include <contrib/dev/acpica/include/accommon.h>
154 #include <contrib/dev/acpica/include/acparser.h>
155 #include <contrib/dev/acpica/include/amlcode.h>
156 #include <contrib/dev/acpica/include/acdispat.h>
157 #include <contrib/dev/acpica/include/acinterp.h>
158 #include <contrib/dev/acpica/include/acnamesp.h>
159 
160 #ifdef ACPI_ASL_COMPILER
161 #include <contrib/dev/acpica/include/acdisasm.h>
162 #endif
163 
164 #define _COMPONENT          ACPI_DISPATCHER
165         ACPI_MODULE_NAME    ("dswload")
166 
167 
168 /*******************************************************************************
169  *
170  * FUNCTION:    AcpiDsInitCallbacks
171  *
172  * PARAMETERS:  WalkState       - Current state of the parse tree walk
173  *              PassNumber      - 1, 2, or 3
174  *
175  * RETURN:      Status
176  *
177  * DESCRIPTION: Init walk state callbacks
178  *
179  ******************************************************************************/
180 
181 ACPI_STATUS
182 AcpiDsInitCallbacks (
183     ACPI_WALK_STATE         *WalkState,
184     UINT32                  PassNumber)
185 {
186 
187     switch (PassNumber)
188     {
189     case 0:
190 
191         /* Parse only - caller will setup callbacks */
192 
193         WalkState->ParseFlags         = ACPI_PARSE_LOAD_PASS1 |
194                                         ACPI_PARSE_DELETE_TREE |
195                                         ACPI_PARSE_DISASSEMBLE;
196         WalkState->DescendingCallback = NULL;
197         WalkState->AscendingCallback  = NULL;
198         break;
199 
200     case 1:
201 
202         /* Load pass 1 */
203 
204         WalkState->ParseFlags         = ACPI_PARSE_LOAD_PASS1 |
205                                         ACPI_PARSE_DELETE_TREE;
206         WalkState->DescendingCallback = AcpiDsLoad1BeginOp;
207         WalkState->AscendingCallback  = AcpiDsLoad1EndOp;
208         break;
209 
210     case 2:
211 
212         /* Load pass 2 */
213 
214         WalkState->ParseFlags         = ACPI_PARSE_LOAD_PASS1 |
215                                         ACPI_PARSE_DELETE_TREE;
216         WalkState->DescendingCallback = AcpiDsLoad2BeginOp;
217         WalkState->AscendingCallback  = AcpiDsLoad2EndOp;
218         break;
219 
220     case 3:
221 
222         /* Execution pass */
223 
224 #ifndef ACPI_NO_METHOD_EXECUTION
225         WalkState->ParseFlags        |= ACPI_PARSE_EXECUTE  |
226                                         ACPI_PARSE_DELETE_TREE;
227         WalkState->DescendingCallback = AcpiDsExecBeginOp;
228         WalkState->AscendingCallback  = AcpiDsExecEndOp;
229 #endif
230         break;
231 
232     default:
233 
234         return (AE_BAD_PARAMETER);
235     }
236 
237     return (AE_OK);
238 }
239 
240 
241 /*******************************************************************************
242  *
243  * FUNCTION:    AcpiDsLoad1BeginOp
244  *
245  * PARAMETERS:  WalkState       - Current state of the parse tree walk
246  *              OutOp           - Where to return op if a new one is created
247  *
248  * RETURN:      Status
249  *
250  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
251  *
252  ******************************************************************************/
253 
254 ACPI_STATUS
255 AcpiDsLoad1BeginOp (
256     ACPI_WALK_STATE         *WalkState,
257     ACPI_PARSE_OBJECT       **OutOp)
258 {
259     ACPI_PARSE_OBJECT       *Op;
260     ACPI_NAMESPACE_NODE     *Node;
261     ACPI_STATUS             Status;
262     ACPI_OBJECT_TYPE        ObjectType;
263     char                    *Path;
264     UINT32                  Flags;
265 
266 
267     ACPI_FUNCTION_TRACE_PTR (DsLoad1BeginOp, WalkState->Op);
268 
269 
270     Op = WalkState->Op;
271     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", Op, WalkState));
272 
273     /* We are only interested in opcodes that have an associated name */
274 
275     if (Op)
276     {
277         if (!(WalkState->OpInfo->Flags & AML_NAMED))
278         {
279             *OutOp = Op;
280             return_ACPI_STATUS (AE_OK);
281         }
282 
283         /* Check if this object has already been installed in the namespace */
284 
285         if (Op->Common.Node)
286         {
287             *OutOp = Op;
288             return_ACPI_STATUS (AE_OK);
289         }
290     }
291 
292     Path = AcpiPsGetNextNamestring (&WalkState->ParserState);
293 
294     /* Map the raw opcode into an internal object type */
295 
296     ObjectType = WalkState->OpInfo->ObjectType;
297 
298     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
299         "State=%p Op=%p [%s]\n", WalkState, Op,
300         AcpiUtGetTypeName (ObjectType)));
301 
302     switch (WalkState->Opcode)
303     {
304     case AML_SCOPE_OP:
305         /*
306          * The target name of the Scope() operator must exist at this point so
307          * that we can actually open the scope to enter new names underneath it.
308          * Allow search-to-root for single namesegs.
309          */
310         Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
311             ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, WalkState, &(Node));
312 #ifdef ACPI_ASL_COMPILER
313         if (Status == AE_NOT_FOUND)
314         {
315             /*
316              * Table disassembly:
317              * Target of Scope() not found. Generate an External for it, and
318              * insert the name into the namespace.
319              */
320             AcpiDmAddOpToExternalList (Op, Path, ACPI_TYPE_DEVICE, 0, 0);
321             Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
322                ACPI_IMODE_LOAD_PASS1, ACPI_NS_SEARCH_PARENT,
323                WalkState, &Node);
324         }
325 #endif
326         if (ACPI_FAILURE (Status))
327         {
328             ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, Path, Status);
329             return_ACPI_STATUS (Status);
330         }
331 
332         /*
333          * Check to make sure that the target is
334          * one of the opcodes that actually opens a scope
335          */
336         switch (Node->Type)
337         {
338         case ACPI_TYPE_ANY:
339         case ACPI_TYPE_LOCAL_SCOPE:         /* Scope  */
340         case ACPI_TYPE_DEVICE:
341         case ACPI_TYPE_POWER:
342         case ACPI_TYPE_PROCESSOR:
343         case ACPI_TYPE_THERMAL:
344 
345             /* These are acceptable types */
346             break;
347 
348         case ACPI_TYPE_INTEGER:
349         case ACPI_TYPE_STRING:
350         case ACPI_TYPE_BUFFER:
351             /*
352              * These types we will allow, but we will change the type.
353              * This enables some existing code of the form:
354              *
355              *  Name (DEB, 0)
356              *  Scope (DEB) { ... }
357              *
358              * Note: silently change the type here. On the second pass,
359              * we will report a warning
360              */
361             ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
362                 "Type override - [%4.4s] had invalid type (%s) "
363                 "for Scope operator, changed to type ANY\n",
364                 AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Node->Type)));
365 
366             Node->Type = ACPI_TYPE_ANY;
367             WalkState->ScopeInfo->Common.Value = ACPI_TYPE_ANY;
368             break;
369 
370         case ACPI_TYPE_METHOD:
371             /*
372              * Allow scope change to root during execution of module-level
373              * code. Root is typed METHOD during this time.
374              */
375             if ((Node == AcpiGbl_RootNode) &&
376                 (WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL))
377             {
378                 break;
379             }
380 
381             /*lint -fallthrough */
382 
383         default:
384 
385             /* All other types are an error */
386 
387             ACPI_ERROR ((AE_INFO,
388                 "Invalid type (%s) for target of "
389                 "Scope operator [%4.4s] (Cannot override)",
390                 AcpiUtGetTypeName (Node->Type), AcpiUtGetNodeName (Node)));
391 
392             return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
393         }
394         break;
395 
396     default:
397         /*
398          * For all other named opcodes, we will enter the name into
399          * the namespace.
400          *
401          * Setup the search flags.
402          * Since we are entering a name into the namespace, we do not want to
403          * enable the search-to-root upsearch.
404          *
405          * There are only two conditions where it is acceptable that the name
406          * already exists:
407          *    1) the Scope() operator can reopen a scoping object that was
408          *       previously defined (Scope, Method, Device, etc.)
409          *    2) Whenever we are parsing a deferred opcode (OpRegion, Buffer,
410          *       BufferField, or Package), the name of the object is already
411          *       in the namespace.
412          */
413         if (WalkState->DeferredNode)
414         {
415             /* This name is already in the namespace, get the node */
416 
417             Node = WalkState->DeferredNode;
418             Status = AE_OK;
419             break;
420         }
421 
422         /*
423          * If we are executing a method, do not create any namespace objects
424          * during the load phase, only during execution.
425          */
426         if (WalkState->MethodNode)
427         {
428             Node = NULL;
429             Status = AE_OK;
430             break;
431         }
432 
433         Flags = ACPI_NS_NO_UPSEARCH;
434         if ((WalkState->Opcode != AML_SCOPE_OP) &&
435             (!(WalkState->ParseFlags & ACPI_PARSE_DEFERRED_OP)))
436         {
437             if (WalkState->NamespaceOverride)
438             {
439                 Flags |= ACPI_NS_OVERRIDE_IF_FOUND;
440                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "[%s] Override allowed\n",
441                     AcpiUtGetTypeName (ObjectType)));
442             }
443             else
444             {
445                 Flags |= ACPI_NS_ERROR_IF_FOUND;
446                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "[%s] Cannot already exist\n",
447                     AcpiUtGetTypeName (ObjectType)));
448             }
449         }
450         else
451         {
452             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
453                 "[%s] Both Find or Create allowed\n",
454                 AcpiUtGetTypeName (ObjectType)));
455         }
456 
457         /*
458          * Enter the named type into the internal namespace. We enter the name
459          * as we go downward in the parse tree. Any necessary subobjects that
460          * involve arguments to the opcode must be created as we go back up the
461          * parse tree later.
462          */
463         Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
464             ACPI_IMODE_LOAD_PASS1, Flags, WalkState, &Node);
465         if (ACPI_FAILURE (Status))
466         {
467             if (Status == AE_ALREADY_EXISTS)
468             {
469                 /* The name already exists in this scope */
470 
471                 if (Node->Flags & ANOBJ_IS_EXTERNAL)
472                 {
473                     /*
474                      * Allow one create on an object or segment that was
475                      * previously declared External
476                      */
477                     Node->Flags &= ~ANOBJ_IS_EXTERNAL;
478                     Node->Type = (UINT8) ObjectType;
479 
480                     /* Just retyped a node, probably will need to open a scope */
481 
482                     if (AcpiNsOpensScope (ObjectType))
483                     {
484                         Status = AcpiDsScopeStackPush (
485                             Node, ObjectType, WalkState);
486                         if (ACPI_FAILURE (Status))
487                         {
488                             return_ACPI_STATUS (Status);
489                         }
490                     }
491 
492                     Status = AE_OK;
493                 }
494             }
495 
496             if (ACPI_FAILURE (Status))
497             {
498                 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, Path, Status);
499                 return_ACPI_STATUS (Status);
500             }
501         }
502         break;
503     }
504 
505     /* Common exit */
506 
507     if (!Op)
508     {
509         /* Create a new op */
510 
511         Op = AcpiPsAllocOp (WalkState->Opcode, WalkState->Aml);
512         if (!Op)
513         {
514             return_ACPI_STATUS (AE_NO_MEMORY);
515         }
516     }
517 
518     /* Initialize the op */
519 
520 #if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY))
521     Op->Named.Path = Path;
522 #endif
523 
524     if (Node)
525     {
526         /*
527          * Put the Node in the "op" object that the parser uses, so we
528          * can get it again quickly when this scope is closed
529          */
530         Op->Common.Node = Node;
531         Op->Named.Name = Node->Name.Integer;
532     }
533 
534     AcpiPsAppendArg (AcpiPsGetParentScope (&WalkState->ParserState), Op);
535     *OutOp = Op;
536     return_ACPI_STATUS (Status);
537 }
538 
539 
540 /*******************************************************************************
541  *
542  * FUNCTION:    AcpiDsLoad1EndOp
543  *
544  * PARAMETERS:  WalkState       - Current state of the parse tree walk
545  *
546  * RETURN:      Status
547  *
548  * DESCRIPTION: Ascending callback used during the loading of the namespace,
549  *              both control methods and everything else.
550  *
551  ******************************************************************************/
552 
553 ACPI_STATUS
554 AcpiDsLoad1EndOp (
555     ACPI_WALK_STATE         *WalkState)
556 {
557     ACPI_PARSE_OBJECT       *Op;
558     ACPI_OBJECT_TYPE        ObjectType;
559     ACPI_STATUS             Status = AE_OK;
560 
561 #ifdef ACPI_ASL_COMPILER
562     UINT8                   ParamCount;
563 #endif
564 
565 
566     ACPI_FUNCTION_TRACE (DsLoad1EndOp);
567 
568 
569     Op = WalkState->Op;
570     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", Op, WalkState));
571 
572     /* We are only interested in opcodes that have an associated name */
573 
574     if (!(WalkState->OpInfo->Flags & (AML_NAMED | AML_FIELD)))
575     {
576         return_ACPI_STATUS (AE_OK);
577     }
578 
579     /* Get the object type to determine if we should pop the scope */
580 
581     ObjectType = WalkState->OpInfo->ObjectType;
582 
583 #ifndef ACPI_NO_METHOD_EXECUTION
584     if (WalkState->OpInfo->Flags & AML_FIELD)
585     {
586         /*
587          * If we are executing a method, do not create any namespace objects
588          * during the load phase, only during execution.
589          */
590         if (!WalkState->MethodNode)
591         {
592             if (WalkState->Opcode == AML_FIELD_OP          ||
593                 WalkState->Opcode == AML_BANK_FIELD_OP     ||
594                 WalkState->Opcode == AML_INDEX_FIELD_OP)
595             {
596                 Status = AcpiDsInitFieldObjects (Op, WalkState);
597             }
598         }
599         return_ACPI_STATUS (Status);
600     }
601 
602     /*
603      * If we are executing a method, do not create any namespace objects
604      * during the load phase, only during execution.
605      */
606     if (!WalkState->MethodNode)
607     {
608         if (Op->Common.AmlOpcode == AML_REGION_OP)
609         {
610             Status = AcpiExCreateRegion (Op->Named.Data, Op->Named.Length,
611                 (ACPI_ADR_SPACE_TYPE)
612                     ((Op->Common.Value.Arg)->Common.Value.Integer),
613                 WalkState);
614             if (ACPI_FAILURE (Status))
615             {
616                 return_ACPI_STATUS (Status);
617             }
618         }
619         else if (Op->Common.AmlOpcode == AML_DATA_REGION_OP)
620         {
621             Status = AcpiExCreateRegion (Op->Named.Data, Op->Named.Length,
622                 ACPI_ADR_SPACE_DATA_TABLE, WalkState);
623             if (ACPI_FAILURE (Status))
624             {
625                 return_ACPI_STATUS (Status);
626             }
627         }
628     }
629 #endif
630 
631     if (Op->Common.AmlOpcode == AML_NAME_OP)
632     {
633         /* For Name opcode, get the object type from the argument */
634 
635         if (Op->Common.Value.Arg)
636         {
637             ObjectType = (AcpiPsGetOpcodeInfo (
638                 (Op->Common.Value.Arg)->Common.AmlOpcode))->ObjectType;
639 
640             /* Set node type if we have a namespace node */
641 
642             if (Op->Common.Node)
643             {
644                 Op->Common.Node->Type = (UINT8) ObjectType;
645             }
646         }
647     }
648 
649 #ifdef ACPI_ASL_COMPILER
650     /*
651      * For external opcode, get the object type from the argument and
652      * get the parameter count from the argument's next.
653      */
654     if (AcpiGbl_DisasmFlag &&
655         Op->Common.Node &&
656         Op->Common.AmlOpcode == AML_EXTERNAL_OP)
657     {
658         /*
659          * Note, if this external is not a method
660          * Op->Common.Value.Arg->Common.Next->Common.Value.Integer == 0
661          * Therefore, ParamCount will be 0.
662          */
663         ParamCount = (UINT8) Op->Common.Value.Arg->Common.Next->Common.Value.Integer;
664         ObjectType = (UINT8) Op->Common.Value.Arg->Common.Value.Integer;
665         Op->Common.Node->Flags |= ANOBJ_IS_EXTERNAL;
666         Op->Common.Node->Type = (UINT8) ObjectType;
667 
668         AcpiDmCreateSubobjectForExternal ((UINT8)ObjectType,
669             &Op->Common.Node, ParamCount);
670 
671         /*
672          * Add the external to the external list because we may be
673          * emitting code based off of the items within the external list.
674          */
675         AcpiDmAddOpToExternalList (Op, Op->Named.Path, (UINT8)ObjectType, ParamCount,
676            ACPI_EXT_ORIGIN_FROM_OPCODE | ACPI_EXT_RESOLVED_REFERENCE);
677     }
678 #endif
679 
680     /*
681      * If we are executing a method, do not create any namespace objects
682      * during the load phase, only during execution.
683      */
684     if (!WalkState->MethodNode)
685     {
686         if (Op->Common.AmlOpcode == AML_METHOD_OP)
687         {
688             /*
689              * MethodOp PkgLength NameString MethodFlags TermList
690              *
691              * Note: We must create the method node/object pair as soon as we
692              * see the method declaration. This allows later pass1 parsing
693              * of invocations of the method (need to know the number of
694              * arguments.)
695              */
696             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
697                 "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
698                 WalkState, Op, Op->Named.Node));
699 
700             if (!AcpiNsGetAttachedObject (Op->Named.Node))
701             {
702                 WalkState->Operands[0] = ACPI_CAST_PTR (void, Op->Named.Node);
703                 WalkState->NumOperands = 1;
704 
705                 Status = AcpiDsCreateOperands (
706                     WalkState, Op->Common.Value.Arg);
707                 if (ACPI_SUCCESS (Status))
708                 {
709                     Status = AcpiExCreateMethod (Op->Named.Data,
710                         Op->Named.Length, WalkState);
711                 }
712 
713                 WalkState->Operands[0] = NULL;
714                 WalkState->NumOperands = 0;
715 
716                 if (ACPI_FAILURE (Status))
717                 {
718                     return_ACPI_STATUS (Status);
719                 }
720             }
721         }
722     }
723 
724     /* Pop the scope stack (only if loading a table) */
725 
726     if (!WalkState->MethodNode &&
727         Op->Common.AmlOpcode != AML_EXTERNAL_OP &&
728         AcpiNsOpensScope (ObjectType))
729     {
730         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s): Popping scope for Op %p\n",
731             AcpiUtGetTypeName (ObjectType), Op));
732 
733         Status = AcpiDsScopeStackPop (WalkState);
734     }
735 
736     return_ACPI_STATUS (Status);
737 }
738