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