exresolv.c revision 107325
167754Smsmith 267754Smsmith/****************************************************************************** 367754Smsmith * 477424Smsmith * Module Name: exresolv - AML Interpreter object resolution 5107325Siwasaki * $Revision: 117 $ 667754Smsmith * 767754Smsmith *****************************************************************************/ 867754Smsmith 967754Smsmith/****************************************************************************** 1067754Smsmith * 1167754Smsmith * 1. Copyright Notice 1267754Smsmith * 1391116Smsmith * Some or all of this work - Copyright (c) 1999 - 2002, Intel Corp. 1470243Smsmith * All rights reserved. 1567754Smsmith * 1667754Smsmith * 2. License 1767754Smsmith * 1867754Smsmith * 2.1. This is your license from Intel Corp. under its intellectual property 1967754Smsmith * rights. You may have additional license terms from the party that provided 2067754Smsmith * you this software, covering your right to use that party's intellectual 2167754Smsmith * property rights. 2267754Smsmith * 2367754Smsmith * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 2467754Smsmith * copy of the source code appearing in this file ("Covered Code") an 2567754Smsmith * irrevocable, perpetual, worldwide license under Intel's copyrights in the 2667754Smsmith * base code distributed originally by Intel ("Original Intel Code") to copy, 2767754Smsmith * make derivatives, distribute, use and display any portion of the Covered 2867754Smsmith * Code in any form, with the right to sublicense such rights; and 2967754Smsmith * 3067754Smsmith * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 3167754Smsmith * license (with the right to sublicense), under only those claims of Intel 3267754Smsmith * patents that are infringed by the Original Intel Code, to make, use, sell, 3367754Smsmith * offer to sell, and import the Covered Code and derivative works thereof 3467754Smsmith * solely to the minimum extent necessary to exercise the above copyright 3567754Smsmith * license, and in no event shall the patent license extend to any additions 3667754Smsmith * to or modifications of the Original Intel Code. No other license or right 3767754Smsmith * is granted directly or by implication, estoppel or otherwise; 3867754Smsmith * 3967754Smsmith * The above copyright and patent license is granted only if the following 4067754Smsmith * conditions are met: 4167754Smsmith * 4267754Smsmith * 3. Conditions 4367754Smsmith * 4467754Smsmith * 3.1. Redistribution of Source with Rights to Further Distribute Source. 4567754Smsmith * Redistribution of source code of any substantial portion of the Covered 4667754Smsmith * Code or modification with rights to further distribute source must include 4767754Smsmith * the above Copyright Notice, the above License, this list of Conditions, 4867754Smsmith * and the following Disclaimer and Export Compliance provision. In addition, 4967754Smsmith * Licensee must cause all Covered Code to which Licensee contributes to 5067754Smsmith * contain a file documenting the changes Licensee made to create that Covered 5167754Smsmith * Code and the date of any change. Licensee must include in that file the 5267754Smsmith * documentation of any changes made by any predecessor Licensee. Licensee 5367754Smsmith * must include a prominent statement that the modification is derived, 5467754Smsmith * directly or indirectly, from Original Intel Code. 5567754Smsmith * 5667754Smsmith * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 5767754Smsmith * Redistribution of source code of any substantial portion of the Covered 5867754Smsmith * Code or modification without rights to further distribute source must 5967754Smsmith * include the following Disclaimer and Export Compliance provision in the 6067754Smsmith * documentation and/or other materials provided with distribution. In 6167754Smsmith * addition, Licensee may not authorize further sublicense of source of any 6267754Smsmith * portion of the Covered Code, and must include terms to the effect that the 6367754Smsmith * license from Licensee to its licensee is limited to the intellectual 6467754Smsmith * property embodied in the software Licensee provides to its licensee, and 6567754Smsmith * not to intellectual property embodied in modifications its licensee may 6667754Smsmith * make. 6767754Smsmith * 6867754Smsmith * 3.3. Redistribution of Executable. Redistribution in executable form of any 6967754Smsmith * substantial portion of the Covered Code or modification must reproduce the 7067754Smsmith * above Copyright Notice, and the following Disclaimer and Export Compliance 7167754Smsmith * provision in the documentation and/or other materials provided with the 7267754Smsmith * distribution. 7367754Smsmith * 7467754Smsmith * 3.4. Intel retains all right, title, and interest in and to the Original 7567754Smsmith * Intel Code. 7667754Smsmith * 7767754Smsmith * 3.5. Neither the name Intel nor any other trademark owned or controlled by 7867754Smsmith * Intel shall be used in advertising or otherwise to promote the sale, use or 7967754Smsmith * other dealings in products derived from or relating to the Covered Code 8067754Smsmith * without prior written authorization from Intel. 8167754Smsmith * 8267754Smsmith * 4. Disclaimer and Export Compliance 8367754Smsmith * 8467754Smsmith * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 8567754Smsmith * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 8667754Smsmith * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 8767754Smsmith * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 8867754Smsmith * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 8967754Smsmith * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 9067754Smsmith * PARTICULAR PURPOSE. 9167754Smsmith * 9267754Smsmith * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 9367754Smsmith * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 9467754Smsmith * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 9567754Smsmith * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 9667754Smsmith * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 9767754Smsmith * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 9867754Smsmith * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 9967754Smsmith * LIMITED REMEDY. 10067754Smsmith * 10167754Smsmith * 4.3. Licensee shall not export, either directly or indirectly, any of this 10267754Smsmith * software or system incorporating such software without first obtaining any 10367754Smsmith * required license or other approval from the U. S. Department of Commerce or 10467754Smsmith * any other agency or department of the United States Government. In the 10567754Smsmith * event Licensee exports any such software from the United States or 10667754Smsmith * re-exports any such software from a foreign destination, Licensee shall 10767754Smsmith * ensure that the distribution and export/re-export of the software is in 10867754Smsmith * compliance with all laws, regulations, orders, or other restrictions of the 10967754Smsmith * U.S. Export Administration Regulations. Licensee agrees that neither it nor 11067754Smsmith * any of its subsidiaries will export/re-export any technical data, process, 11167754Smsmith * software, or service, directly or indirectly, to any country for which the 11267754Smsmith * United States government or any agency thereof requires an export license, 11367754Smsmith * other governmental approval, or letter of assurance, without first obtaining 11467754Smsmith * such license, approval or letter. 11567754Smsmith * 11667754Smsmith *****************************************************************************/ 11767754Smsmith 11877424Smsmith#define __EXRESOLV_C__ 11967754Smsmith 12067754Smsmith#include "acpi.h" 12167754Smsmith#include "amlcode.h" 12267754Smsmith#include "acdispat.h" 12367754Smsmith#include "acinterp.h" 124104470Siwasaki#include "acnamesp.h" 12567754Smsmith 12667754Smsmith 12777424Smsmith#define _COMPONENT ACPI_EXECUTER 12891116Smsmith ACPI_MODULE_NAME ("exresolv") 12967754Smsmith 13067754Smsmith 13167754Smsmith/******************************************************************************* 13267754Smsmith * 13377424Smsmith * FUNCTION: AcpiExResolveToValue 13467754Smsmith * 13567754Smsmith * PARAMETERS: **StackPtr - Points to entry on ObjStack, which can 13677424Smsmith * be either an (ACPI_OPERAND_OBJECT *) 13767754Smsmith * or an ACPI_HANDLE. 13877424Smsmith * WalkState - Current method state 13967754Smsmith * 14067754Smsmith * RETURN: Status 14167754Smsmith * 14271867Smsmith * DESCRIPTION: Convert Reference objects to values 14367754Smsmith * 14467754Smsmith ******************************************************************************/ 14567754Smsmith 14667754SmsmithACPI_STATUS 14777424SmsmithAcpiExResolveToValue ( 14867754Smsmith ACPI_OPERAND_OBJECT **StackPtr, 14967754Smsmith ACPI_WALK_STATE *WalkState) 15067754Smsmith{ 15177424Smsmith ACPI_STATUS Status; 15267754Smsmith 15367754Smsmith 15491116Smsmith ACPI_FUNCTION_TRACE_PTR ("ExResolveToValue", StackPtr); 15567754Smsmith 15667754Smsmith 15767754Smsmith if (!StackPtr || !*StackPtr) 15867754Smsmith { 15982367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - null pointer\n")); 16067754Smsmith return_ACPI_STATUS (AE_AML_NO_OPERAND); 16167754Smsmith } 16267754Smsmith 16367754Smsmith /* 16467754Smsmith * The entity pointed to by the StackPtr can be either 16567754Smsmith * 1) A valid ACPI_OPERAND_OBJECT, or 16667754Smsmith * 2) A ACPI_NAMESPACE_NODE (NamedObj) 16767754Smsmith */ 16899679Siwasaki if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_OPERAND) 16967754Smsmith { 17077424Smsmith Status = AcpiExResolveObjectToValue (StackPtr, WalkState); 17167754Smsmith if (ACPI_FAILURE (Status)) 17267754Smsmith { 17367754Smsmith return_ACPI_STATUS (Status); 17467754Smsmith } 17567754Smsmith } 17667754Smsmith 17767754Smsmith /* 17877424Smsmith * Object on the stack may have changed if AcpiExResolveObjectToValue() 17967754Smsmith * was called (i.e., we can't use an _else_ here.) 18067754Smsmith */ 18191116Smsmith if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_NAMED) 18267754Smsmith { 18399679Siwasaki Status = AcpiExResolveNodeToValue ( 18499679Siwasaki ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, StackPtr), 18577424Smsmith WalkState); 18677424Smsmith if (ACPI_FAILURE (Status)) 18777424Smsmith { 18877424Smsmith return_ACPI_STATUS (Status); 18977424Smsmith } 19067754Smsmith } 19167754Smsmith 19299146Siwasaki ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Resolved object %p\n", *StackPtr)); 19377424Smsmith return_ACPI_STATUS (AE_OK); 19467754Smsmith} 19567754Smsmith 19667754Smsmith 19767754Smsmith/******************************************************************************* 19867754Smsmith * 19977424Smsmith * FUNCTION: AcpiExResolveObjectToValue 20067754Smsmith * 20167754Smsmith * PARAMETERS: StackPtr - Pointer to a stack location that contains a 20267754Smsmith * ptr to an internal object. 20377424Smsmith * WalkState - Current method state 20467754Smsmith * 20567754Smsmith * RETURN: Status 20667754Smsmith * 20767754Smsmith * DESCRIPTION: Retrieve the value from an internal object. The Reference type 20867754Smsmith * uses the associated AML opcode to determine the value. 20967754Smsmith * 21067754Smsmith ******************************************************************************/ 21167754Smsmith 21267754SmsmithACPI_STATUS 21377424SmsmithAcpiExResolveObjectToValue ( 21467754Smsmith ACPI_OPERAND_OBJECT **StackPtr, 21567754Smsmith ACPI_WALK_STATE *WalkState) 21667754Smsmith{ 21777424Smsmith ACPI_STATUS Status = AE_OK; 21867754Smsmith ACPI_OPERAND_OBJECT *StackDesc; 21977424Smsmith void *TempNode; 22077424Smsmith ACPI_OPERAND_OBJECT *ObjDesc; 22167754Smsmith UINT16 Opcode; 22267754Smsmith 22367754Smsmith 22491116Smsmith ACPI_FUNCTION_TRACE ("ExResolveObjectToValue"); 22567754Smsmith 22667754Smsmith 22767754Smsmith StackDesc = *StackPtr; 22867754Smsmith 22967754Smsmith /* This is an ACPI_OPERAND_OBJECT */ 23067754Smsmith 23199679Siwasaki switch (ACPI_GET_OBJECT_TYPE (StackDesc)) 23267754Smsmith { 233107325Siwasaki case ACPI_TYPE_LOCAL_REFERENCE: 23467754Smsmith 23577424Smsmith Opcode = StackDesc->Reference.Opcode; 23667754Smsmith 23767754Smsmith switch (Opcode) 23867754Smsmith { 23967754Smsmith case AML_NAME_OP: 24067754Smsmith 24167754Smsmith /* 24267754Smsmith * Convert indirect name ptr to a direct name ptr. 24377424Smsmith * Then, AcpiExResolveNodeToValue can be used to get the value 24467754Smsmith */ 24577424Smsmith TempNode = StackDesc->Reference.Object; 24667754Smsmith 24767754Smsmith /* Delete the Reference Object */ 24867754Smsmith 24977424Smsmith AcpiUtRemoveReference (StackDesc); 25067754Smsmith 25167754Smsmith /* Put direct name pointer onto stack and exit */ 25267754Smsmith 25377424Smsmith (*StackPtr) = TempNode; 25467754Smsmith break; 25567754Smsmith 25667754Smsmith 25767754Smsmith case AML_LOCAL_OP: 25877424Smsmith case AML_ARG_OP: 25967754Smsmith 26067754Smsmith /* 26167754Smsmith * Get the local from the method's state info 26267754Smsmith * Note: this increments the local's object reference count 26367754Smsmith */ 26477424Smsmith Status = AcpiDsMethodDataGetValue (Opcode, 26577424Smsmith StackDesc->Reference.Offset, WalkState, &ObjDesc); 26667754Smsmith if (ACPI_FAILURE (Status)) 26767754Smsmith { 26867754Smsmith return_ACPI_STATUS (Status); 26967754Smsmith } 27067754Smsmith 27167754Smsmith /* 27267754Smsmith * Now we can delete the original Reference Object and 27367754Smsmith * replace it with the resolve value 27467754Smsmith */ 27577424Smsmith AcpiUtRemoveReference (StackDesc); 27667754Smsmith *StackPtr = ObjDesc; 27767754Smsmith 27899146Siwasaki ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Arg/Local %d] ValueObj is %p\n", 27977424Smsmith StackDesc->Reference.Offset, ObjDesc)); 28067754Smsmith break; 28167754Smsmith 28267754Smsmith 28367754Smsmith case AML_INDEX_OP: 28467754Smsmith 28567754Smsmith switch (StackDesc->Reference.TargetType) 28667754Smsmith { 28767754Smsmith case ACPI_TYPE_BUFFER_FIELD: 28867754Smsmith 28967754Smsmith /* Just return - leave the Reference on the stack */ 29067754Smsmith break; 29167754Smsmith 29267754Smsmith 29367754Smsmith case ACPI_TYPE_PACKAGE: 29499679Siwasaki 29567754Smsmith ObjDesc = *StackDesc->Reference.Where; 29667754Smsmith if (ObjDesc) 29767754Smsmith { 29867754Smsmith /* 29967754Smsmith * Valid obj descriptor, copy pointer to return value 30067754Smsmith * (i.e., dereference the package index) 30167754Smsmith * Delete the ref object, increment the returned object 30267754Smsmith */ 30377424Smsmith AcpiUtRemoveReference (StackDesc); 30477424Smsmith AcpiUtAddReference (ObjDesc); 30567754Smsmith *StackPtr = ObjDesc; 30667754Smsmith } 30767754Smsmith else 30867754Smsmith { 30967754Smsmith /* 31067754Smsmith * A NULL object descriptor means an unitialized element of 31177424Smsmith * the package, can't dereference it 31267754Smsmith */ 31382367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 31483174Smsmith "Attempt to deref an Index to NULL pkg element Idx=%p\n", 31577424Smsmith StackDesc)); 31667754Smsmith Status = AE_AML_UNINITIALIZED_ELEMENT; 31767754Smsmith } 31867754Smsmith break; 31967754Smsmith 32099679Siwasaki 32167754Smsmith default: 32299679Siwasaki 32377424Smsmith /* Invalid reference object */ 32467754Smsmith 32582367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 32682367Smsmith "Unknown TargetType %X in Index/Reference obj %p\n", 32767754Smsmith StackDesc->Reference.TargetType, StackDesc)); 32867754Smsmith Status = AE_AML_INTERNAL; 32967754Smsmith break; 33067754Smsmith } 33167754Smsmith break; 33267754Smsmith 33367754Smsmith 334100966Siwasaki case AML_REF_OF_OP: 33567754Smsmith case AML_DEBUG_OP: 33667754Smsmith 33767754Smsmith /* Just leave the object as-is */ 338100966Siwasaki 33967754Smsmith break; 34067754Smsmith 34167754Smsmith 34267754Smsmith default: 34367754Smsmith 34499679Siwasaki ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown Reference opcode %X in %p\n", 34567754Smsmith Opcode, StackDesc)); 34667754Smsmith Status = AE_AML_INTERNAL; 34777424Smsmith break; 34899679Siwasaki } 34999679Siwasaki break; 35067754Smsmith 35167754Smsmith 35299146Siwasaki case ACPI_TYPE_BUFFER: 35399146Siwasaki 35499146Siwasaki Status = AcpiDsGetBufferArguments (StackDesc); 35599146Siwasaki break; 35699146Siwasaki 35799146Siwasaki 35899146Siwasaki case ACPI_TYPE_PACKAGE: 35999146Siwasaki 36099146Siwasaki Status = AcpiDsGetPackageArguments (StackDesc); 36199146Siwasaki break; 36299146Siwasaki 36399146Siwasaki 36487031Smsmith /* 36591116Smsmith * These cases may never happen here, but just in case.. 36687031Smsmith */ 36777424Smsmith case ACPI_TYPE_BUFFER_FIELD: 368107325Siwasaki case ACPI_TYPE_LOCAL_REGION_FIELD: 369107325Siwasaki case ACPI_TYPE_LOCAL_BANK_FIELD: 370107325Siwasaki case ACPI_TYPE_LOCAL_INDEX_FIELD: 37167754Smsmith 37287031Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "FieldRead SourceDesc=%p Type=%X\n", 37399679Siwasaki StackDesc, ACPI_GET_OBJECT_TYPE (StackDesc))); 37467754Smsmith 37599146Siwasaki Status = AcpiExReadDataFromField (WalkState, StackDesc, &ObjDesc); 37667754Smsmith *StackPtr = (void *) ObjDesc; 37767754Smsmith break; 37867754Smsmith 37967754Smsmith default: 38067754Smsmith break; 38187031Smsmith } 38267754Smsmith 38367754Smsmith return_ACPI_STATUS (Status); 38467754Smsmith} 38567754Smsmith 38667754Smsmith 387104470Siwasaki/******************************************************************************* 388104470Siwasaki * 389104470Siwasaki * FUNCTION: AcpiExResolveMultiple 390104470Siwasaki * 391104470Siwasaki * PARAMETERS: WalkState - Current state (contains AML opcode) 392104470Siwasaki * Operand - Starting point for resolution 393104470Siwasaki * ReturnType - Where the object type is returned 394104470Siwasaki * ReturnDesc - Where the resolved object is returned 395104470Siwasaki * 396104470Siwasaki * RETURN: Status 397104470Siwasaki * 398104470Siwasaki * DESCRIPTION: Return the base object and type. Traverse a reference list if 399104470Siwasaki * necessary to get to the base object. 400104470Siwasaki * 401104470Siwasaki ******************************************************************************/ 402104470Siwasaki 403104470SiwasakiACPI_STATUS 404104470SiwasakiAcpiExResolveMultiple ( 405104470Siwasaki ACPI_WALK_STATE *WalkState, 406104470Siwasaki ACPI_OPERAND_OBJECT *Operand, 407104470Siwasaki ACPI_OBJECT_TYPE *ReturnType, 408104470Siwasaki ACPI_OPERAND_OBJECT **ReturnDesc) 409104470Siwasaki{ 410104470Siwasaki ACPI_OPERAND_OBJECT *ObjDesc = (void *) Operand; 411104470Siwasaki ACPI_NAMESPACE_NODE *Node; 412104470Siwasaki ACPI_OBJECT_TYPE Type; 413104470Siwasaki 414104470Siwasaki 415107325Siwasaki ACPI_FUNCTION_TRACE ("AcpiExResolveMultiple"); 416104470Siwasaki 417104470Siwasaki 418104470Siwasaki /* 419104470Siwasaki * For reference objects created via the RefOf or Index operators, 420104470Siwasaki * we need to get to the base object (as per the ACPI specification 421104470Siwasaki * of the ObjectType and SizeOf operators). This means traversing 422104470Siwasaki * the list of possibly many nested references. 423104470Siwasaki */ 424107325Siwasaki while (ACPI_GET_OBJECT_TYPE (ObjDesc) == ACPI_TYPE_LOCAL_REFERENCE) 425104470Siwasaki { 426104470Siwasaki switch (ObjDesc->Reference.Opcode) 427104470Siwasaki { 428104470Siwasaki case AML_REF_OF_OP: 429104470Siwasaki 430104470Siwasaki /* Dereference the reference pointer */ 431104470Siwasaki 432104470Siwasaki Node = ObjDesc->Reference.Object; 433104470Siwasaki 434104470Siwasaki /* All "References" point to a NS node */ 435104470Siwasaki 436104470Siwasaki if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED) 437104470Siwasaki { 438104470Siwasaki return_ACPI_STATUS (AE_AML_INTERNAL); 439104470Siwasaki } 440104470Siwasaki 441104470Siwasaki /* Get the attached object */ 442104470Siwasaki 443104470Siwasaki ObjDesc = AcpiNsGetAttachedObject (Node); 444104470Siwasaki if (!ObjDesc) 445104470Siwasaki { 446104470Siwasaki /* No object, use the NS node type */ 447104470Siwasaki 448104470Siwasaki Type = AcpiNsGetType (Node); 449104470Siwasaki goto Exit; 450104470Siwasaki } 451104470Siwasaki 452104470Siwasaki /* Check for circular references */ 453104470Siwasaki 454104470Siwasaki if (ObjDesc == Operand) 455104470Siwasaki { 456104470Siwasaki return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE); 457104470Siwasaki } 458104470Siwasaki break; 459104470Siwasaki 460104470Siwasaki 461104470Siwasaki case AML_INDEX_OP: 462104470Siwasaki 463104470Siwasaki /* Get the type of this reference (index into another object) */ 464104470Siwasaki 465104470Siwasaki Type = ObjDesc->Reference.TargetType; 466104470Siwasaki if (Type != ACPI_TYPE_PACKAGE) 467104470Siwasaki { 468104470Siwasaki goto Exit; 469104470Siwasaki } 470104470Siwasaki 471104470Siwasaki /* 472104470Siwasaki * The main object is a package, we want to get the type 473104470Siwasaki * of the individual package element that is referenced by 474104470Siwasaki * the index. 475104470Siwasaki * 476104470Siwasaki * This could of course in turn be another reference object. 477104470Siwasaki */ 478104470Siwasaki ObjDesc = *(ObjDesc->Reference.Where); 479104470Siwasaki break; 480104470Siwasaki 481104470Siwasaki 482104470Siwasaki case AML_INT_NAMEPATH_OP: 483104470Siwasaki 484104470Siwasaki /* Dereference the reference pointer */ 485104470Siwasaki 486104470Siwasaki Node = ObjDesc->Reference.Node; 487104470Siwasaki 488104470Siwasaki /* All "References" point to a NS node */ 489104470Siwasaki 490104470Siwasaki if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED) 491104470Siwasaki { 492104470Siwasaki return_ACPI_STATUS (AE_AML_INTERNAL); 493104470Siwasaki } 494104470Siwasaki 495104470Siwasaki /* Get the attached object */ 496104470Siwasaki 497104470Siwasaki ObjDesc = AcpiNsGetAttachedObject (Node); 498104470Siwasaki if (!ObjDesc) 499104470Siwasaki { 500104470Siwasaki /* No object, use the NS node type */ 501104470Siwasaki 502104470Siwasaki Type = AcpiNsGetType (Node); 503104470Siwasaki goto Exit; 504104470Siwasaki } 505104470Siwasaki 506104470Siwasaki /* Check for circular references */ 507104470Siwasaki 508104470Siwasaki if (ObjDesc == Operand) 509104470Siwasaki { 510104470Siwasaki return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE); 511104470Siwasaki } 512104470Siwasaki break; 513104470Siwasaki 514104470Siwasaki 515104470Siwasaki case AML_DEBUG_OP: 516104470Siwasaki 517104470Siwasaki /* The Debug Object is of type "DebugObject" */ 518104470Siwasaki 519104470Siwasaki Type = ACPI_TYPE_DEBUG_OBJECT; 520104470Siwasaki goto Exit; 521104470Siwasaki 522104470Siwasaki 523104470Siwasaki default: 524104470Siwasaki 525104470Siwasaki ACPI_REPORT_ERROR (("AcpiExResolveMultiple: Unknown Reference subtype %X\n", 526104470Siwasaki ObjDesc->Reference.Opcode)); 527104470Siwasaki return_ACPI_STATUS (AE_AML_INTERNAL); 528104470Siwasaki } 529104470Siwasaki } 530104470Siwasaki 531104470Siwasaki /* 532104470Siwasaki * Now we are guaranteed to have an object that has not been created 533104470Siwasaki * via the RefOf or Index operators. 534104470Siwasaki */ 535104470Siwasaki Type = ACPI_GET_OBJECT_TYPE (ObjDesc); 536104470Siwasaki 537104470Siwasaki 538104470SiwasakiExit: 539104470Siwasaki /* Convert internal types to external types */ 540104470Siwasaki 541104470Siwasaki switch (Type) 542104470Siwasaki { 543107325Siwasaki case ACPI_TYPE_LOCAL_REGION_FIELD: 544107325Siwasaki case ACPI_TYPE_LOCAL_BANK_FIELD: 545107325Siwasaki case ACPI_TYPE_LOCAL_INDEX_FIELD: 546104470Siwasaki 547104470Siwasaki Type = ACPI_TYPE_FIELD_UNIT; 548104470Siwasaki break; 549104470Siwasaki 550107325Siwasaki case ACPI_TYPE_LOCAL_SCOPE: 551107325Siwasaki 552107325Siwasaki /* Per ACPI Specification, Scope is untyped */ 553107325Siwasaki 554107325Siwasaki Type = ACPI_TYPE_ANY; 555107325Siwasaki break; 556107325Siwasaki 557104470Siwasaki default: 558104470Siwasaki /* No change to Type required */ 559104470Siwasaki break; 560104470Siwasaki } 561104470Siwasaki 562104470Siwasaki *ReturnType = Type; 563104470Siwasaki if (ReturnDesc) 564104470Siwasaki { 565104470Siwasaki *ReturnDesc = ObjDesc; 566104470Siwasaki } 567104470Siwasaki return_ACPI_STATUS (AE_OK); 568104470Siwasaki} 569104470Siwasaki 570104470Siwasaki 571