exresolv.c revision 129684
167754Smsmith 267754Smsmith/****************************************************************************** 367754Smsmith * 477424Smsmith * Module Name: exresolv - AML Interpreter object resolution 5129684Snjl * $Revision: 124 $ 667754Smsmith * 767754Smsmith *****************************************************************************/ 867754Smsmith 967754Smsmith/****************************************************************************** 1067754Smsmith * 1167754Smsmith * 1. Copyright Notice 1267754Smsmith * 13126372Snjl * Some or all of this work - Copyright (c) 1999 - 2004, 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" 125123315Snjl#include "acparser.h" 12667754Smsmith 12767754Smsmith 12877424Smsmith#define _COMPONENT ACPI_EXECUTER 12991116Smsmith ACPI_MODULE_NAME ("exresolv") 13067754Smsmith 13167754Smsmith 13267754Smsmith/******************************************************************************* 13367754Smsmith * 13477424Smsmith * FUNCTION: AcpiExResolveToValue 13567754Smsmith * 13667754Smsmith * PARAMETERS: **StackPtr - Points to entry on ObjStack, which can 13777424Smsmith * be either an (ACPI_OPERAND_OBJECT *) 13867754Smsmith * or an ACPI_HANDLE. 13977424Smsmith * WalkState - Current method state 14067754Smsmith * 14167754Smsmith * RETURN: Status 14267754Smsmith * 14371867Smsmith * DESCRIPTION: Convert Reference objects to values 14467754Smsmith * 14567754Smsmith ******************************************************************************/ 14667754Smsmith 14767754SmsmithACPI_STATUS 14877424SmsmithAcpiExResolveToValue ( 14967754Smsmith ACPI_OPERAND_OBJECT **StackPtr, 15067754Smsmith ACPI_WALK_STATE *WalkState) 15167754Smsmith{ 15277424Smsmith ACPI_STATUS Status; 15367754Smsmith 15467754Smsmith 15591116Smsmith ACPI_FUNCTION_TRACE_PTR ("ExResolveToValue", StackPtr); 15667754Smsmith 15767754Smsmith 15867754Smsmith if (!StackPtr || !*StackPtr) 15967754Smsmith { 16082367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - null pointer\n")); 16167754Smsmith return_ACPI_STATUS (AE_AML_NO_OPERAND); 16267754Smsmith } 16367754Smsmith 16467754Smsmith /* 16567754Smsmith * The entity pointed to by the StackPtr can be either 16667754Smsmith * 1) A valid ACPI_OPERAND_OBJECT, or 16767754Smsmith * 2) A ACPI_NAMESPACE_NODE (NamedObj) 16867754Smsmith */ 16999679Siwasaki if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_OPERAND) 17067754Smsmith { 17177424Smsmith Status = AcpiExResolveObjectToValue (StackPtr, WalkState); 17267754Smsmith if (ACPI_FAILURE (Status)) 17367754Smsmith { 17467754Smsmith return_ACPI_STATUS (Status); 17567754Smsmith } 17667754Smsmith } 17767754Smsmith 17867754Smsmith /* 17977424Smsmith * Object on the stack may have changed if AcpiExResolveObjectToValue() 18067754Smsmith * was called (i.e., we can't use an _else_ here.) 18167754Smsmith */ 18291116Smsmith if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_NAMED) 18367754Smsmith { 18499679Siwasaki Status = AcpiExResolveNodeToValue ( 18599679Siwasaki ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, StackPtr), 18677424Smsmith WalkState); 18777424Smsmith if (ACPI_FAILURE (Status)) 18877424Smsmith { 18977424Smsmith return_ACPI_STATUS (Status); 19077424Smsmith } 19167754Smsmith } 19267754Smsmith 19399146Siwasaki ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Resolved object %p\n", *StackPtr)); 19477424Smsmith return_ACPI_STATUS (AE_OK); 19567754Smsmith} 19667754Smsmith 19767754Smsmith 19867754Smsmith/******************************************************************************* 19967754Smsmith * 20077424Smsmith * FUNCTION: AcpiExResolveObjectToValue 20167754Smsmith * 20267754Smsmith * PARAMETERS: StackPtr - Pointer to a stack location that contains a 20367754Smsmith * ptr to an internal object. 20477424Smsmith * WalkState - Current method state 20567754Smsmith * 20667754Smsmith * RETURN: Status 20767754Smsmith * 20867754Smsmith * DESCRIPTION: Retrieve the value from an internal object. The Reference type 20967754Smsmith * uses the associated AML opcode to determine the value. 21067754Smsmith * 21167754Smsmith ******************************************************************************/ 21267754Smsmith 21367754SmsmithACPI_STATUS 21477424SmsmithAcpiExResolveObjectToValue ( 21567754Smsmith ACPI_OPERAND_OBJECT **StackPtr, 21667754Smsmith ACPI_WALK_STATE *WalkState) 21767754Smsmith{ 21877424Smsmith ACPI_STATUS Status = AE_OK; 21967754Smsmith ACPI_OPERAND_OBJECT *StackDesc; 22077424Smsmith void *TempNode; 22177424Smsmith ACPI_OPERAND_OBJECT *ObjDesc; 22267754Smsmith UINT16 Opcode; 22367754Smsmith 22467754Smsmith 22591116Smsmith ACPI_FUNCTION_TRACE ("ExResolveObjectToValue"); 22667754Smsmith 22767754Smsmith 22867754Smsmith StackDesc = *StackPtr; 22967754Smsmith 23067754Smsmith /* This is an ACPI_OPERAND_OBJECT */ 23167754Smsmith 23299679Siwasaki switch (ACPI_GET_OBJECT_TYPE (StackDesc)) 23367754Smsmith { 234107325Siwasaki case ACPI_TYPE_LOCAL_REFERENCE: 23567754Smsmith 23677424Smsmith Opcode = StackDesc->Reference.Opcode; 23767754Smsmith 23867754Smsmith switch (Opcode) 23967754Smsmith { 24067754Smsmith case AML_NAME_OP: 24167754Smsmith 24267754Smsmith /* 24367754Smsmith * Convert indirect name ptr to a direct name ptr. 24477424Smsmith * Then, AcpiExResolveNodeToValue can be used to get the value 24567754Smsmith */ 24677424Smsmith TempNode = StackDesc->Reference.Object; 24767754Smsmith 24867754Smsmith /* Delete the Reference Object */ 24967754Smsmith 25077424Smsmith AcpiUtRemoveReference (StackDesc); 25167754Smsmith 25267754Smsmith /* Put direct name pointer onto stack and exit */ 25367754Smsmith 25477424Smsmith (*StackPtr) = TempNode; 25567754Smsmith break; 25667754Smsmith 25767754Smsmith 25867754Smsmith case AML_LOCAL_OP: 25977424Smsmith case AML_ARG_OP: 26067754Smsmith 26167754Smsmith /* 26267754Smsmith * Get the local from the method's state info 26367754Smsmith * Note: this increments the local's object reference count 26467754Smsmith */ 26577424Smsmith Status = AcpiDsMethodDataGetValue (Opcode, 26677424Smsmith StackDesc->Reference.Offset, WalkState, &ObjDesc); 26767754Smsmith if (ACPI_FAILURE (Status)) 26867754Smsmith { 26967754Smsmith return_ACPI_STATUS (Status); 27067754Smsmith } 27167754Smsmith 272129684Snjl ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Arg/Local %X] ValueObj is %p\n", 273129684Snjl StackDesc->Reference.Offset, ObjDesc)); 274129684Snjl 27567754Smsmith /* 27667754Smsmith * Now we can delete the original Reference Object and 277129684Snjl * replace it with the resolved value 27867754Smsmith */ 27977424Smsmith AcpiUtRemoveReference (StackDesc); 28067754Smsmith *StackPtr = ObjDesc; 28167754Smsmith break; 28267754Smsmith 28367754Smsmith 28467754Smsmith case AML_INDEX_OP: 28567754Smsmith 28667754Smsmith switch (StackDesc->Reference.TargetType) 28767754Smsmith { 28867754Smsmith case ACPI_TYPE_BUFFER_FIELD: 28967754Smsmith 29067754Smsmith /* Just return - leave the Reference on the stack */ 29167754Smsmith break; 29267754Smsmith 29367754Smsmith 29467754Smsmith case ACPI_TYPE_PACKAGE: 29599679Siwasaki 29667754Smsmith ObjDesc = *StackDesc->Reference.Where; 29767754Smsmith if (ObjDesc) 29867754Smsmith { 29967754Smsmith /* 30067754Smsmith * Valid obj descriptor, copy pointer to return value 30167754Smsmith * (i.e., dereference the package index) 30267754Smsmith * Delete the ref object, increment the returned object 30367754Smsmith */ 30477424Smsmith AcpiUtRemoveReference (StackDesc); 30577424Smsmith AcpiUtAddReference (ObjDesc); 30667754Smsmith *StackPtr = ObjDesc; 30767754Smsmith } 30867754Smsmith else 30967754Smsmith { 31067754Smsmith /* 31167754Smsmith * A NULL object descriptor means an unitialized element of 31277424Smsmith * the package, can't dereference it 31367754Smsmith */ 31482367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 31583174Smsmith "Attempt to deref an Index to NULL pkg element Idx=%p\n", 31677424Smsmith StackDesc)); 31767754Smsmith Status = AE_AML_UNINITIALIZED_ELEMENT; 31867754Smsmith } 31967754Smsmith break; 32067754Smsmith 32199679Siwasaki 32267754Smsmith default: 32399679Siwasaki 32477424Smsmith /* Invalid reference object */ 32567754Smsmith 326126372Snjl ACPI_REPORT_ERROR (( 327126372Snjl "During resolve, Unknown TargetType %X in Index/Reference obj %p\n", 32867754Smsmith StackDesc->Reference.TargetType, StackDesc)); 32967754Smsmith Status = AE_AML_INTERNAL; 33067754Smsmith break; 33167754Smsmith } 33267754Smsmith break; 33367754Smsmith 33467754Smsmith 335100966Siwasaki case AML_REF_OF_OP: 33667754Smsmith case AML_DEBUG_OP: 337123315Snjl case AML_LOAD_OP: 33867754Smsmith 33967754Smsmith /* Just leave the object as-is */ 340100966Siwasaki 34167754Smsmith break; 34267754Smsmith 34367754Smsmith 34467754Smsmith default: 34567754Smsmith 346126372Snjl ACPI_REPORT_ERROR (("During resolve, Unknown Reference opcode %X (%s) in %p\n", 347123315Snjl Opcode, AcpiPsGetOpcodeName (Opcode), StackDesc)); 34867754Smsmith Status = AE_AML_INTERNAL; 34977424Smsmith break; 35099679Siwasaki } 35199679Siwasaki break; 35267754Smsmith 35367754Smsmith 35499146Siwasaki case ACPI_TYPE_BUFFER: 35599146Siwasaki 35699146Siwasaki Status = AcpiDsGetBufferArguments (StackDesc); 35799146Siwasaki break; 35899146Siwasaki 35999146Siwasaki 36099146Siwasaki case ACPI_TYPE_PACKAGE: 36199146Siwasaki 36299146Siwasaki Status = AcpiDsGetPackageArguments (StackDesc); 36399146Siwasaki break; 36499146Siwasaki 36599146Siwasaki 36687031Smsmith /* 36791116Smsmith * These cases may never happen here, but just in case.. 36887031Smsmith */ 36977424Smsmith case ACPI_TYPE_BUFFER_FIELD: 370107325Siwasaki case ACPI_TYPE_LOCAL_REGION_FIELD: 371107325Siwasaki case ACPI_TYPE_LOCAL_BANK_FIELD: 372107325Siwasaki case ACPI_TYPE_LOCAL_INDEX_FIELD: 37367754Smsmith 37487031Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "FieldRead SourceDesc=%p Type=%X\n", 37599679Siwasaki StackDesc, ACPI_GET_OBJECT_TYPE (StackDesc))); 37667754Smsmith 37799146Siwasaki Status = AcpiExReadDataFromField (WalkState, StackDesc, &ObjDesc); 37867754Smsmith *StackPtr = (void *) ObjDesc; 37967754Smsmith break; 38067754Smsmith 38167754Smsmith default: 38267754Smsmith break; 38387031Smsmith } 38467754Smsmith 38567754Smsmith return_ACPI_STATUS (Status); 38667754Smsmith} 38767754Smsmith 38867754Smsmith 389104470Siwasaki/******************************************************************************* 390104470Siwasaki * 391104470Siwasaki * FUNCTION: AcpiExResolveMultiple 392104470Siwasaki * 393104470Siwasaki * PARAMETERS: WalkState - Current state (contains AML opcode) 394104470Siwasaki * Operand - Starting point for resolution 395104470Siwasaki * ReturnType - Where the object type is returned 396104470Siwasaki * ReturnDesc - Where the resolved object is returned 397104470Siwasaki * 398104470Siwasaki * RETURN: Status 399104470Siwasaki * 400104470Siwasaki * DESCRIPTION: Return the base object and type. Traverse a reference list if 401104470Siwasaki * necessary to get to the base object. 402104470Siwasaki * 403104470Siwasaki ******************************************************************************/ 404104470Siwasaki 405104470SiwasakiACPI_STATUS 406104470SiwasakiAcpiExResolveMultiple ( 407104470Siwasaki ACPI_WALK_STATE *WalkState, 408104470Siwasaki ACPI_OPERAND_OBJECT *Operand, 409104470Siwasaki ACPI_OBJECT_TYPE *ReturnType, 410104470Siwasaki ACPI_OPERAND_OBJECT **ReturnDesc) 411104470Siwasaki{ 412104470Siwasaki ACPI_OPERAND_OBJECT *ObjDesc = (void *) Operand; 413104470Siwasaki ACPI_NAMESPACE_NODE *Node; 414104470Siwasaki ACPI_OBJECT_TYPE Type; 415104470Siwasaki 416104470Siwasaki 417107325Siwasaki ACPI_FUNCTION_TRACE ("AcpiExResolveMultiple"); 418104470Siwasaki 419104470Siwasaki 420104470Siwasaki /* 421104470Siwasaki * For reference objects created via the RefOf or Index operators, 422114237Snjl * we need to get to the base object (as per the ACPI specification 423114237Snjl * of the ObjectType and SizeOf operators). This means traversing 424104470Siwasaki * the list of possibly many nested references. 425104470Siwasaki */ 426107325Siwasaki while (ACPI_GET_OBJECT_TYPE (ObjDesc) == ACPI_TYPE_LOCAL_REFERENCE) 427104470Siwasaki { 428104470Siwasaki switch (ObjDesc->Reference.Opcode) 429104470Siwasaki { 430104470Siwasaki case AML_REF_OF_OP: 431104470Siwasaki 432104470Siwasaki /* Dereference the reference pointer */ 433104470Siwasaki 434104470Siwasaki Node = ObjDesc->Reference.Object; 435104470Siwasaki 436104470Siwasaki /* All "References" point to a NS node */ 437104470Siwasaki 438104470Siwasaki if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED) 439104470Siwasaki { 440123315Snjl ACPI_REPORT_ERROR (("AcpiExResolveMultiple: Not a NS node %p [%s]\n", 441123315Snjl Node, AcpiUtGetDescriptorName (Node))); 442104470Siwasaki return_ACPI_STATUS (AE_AML_INTERNAL); 443104470Siwasaki } 444104470Siwasaki 445104470Siwasaki /* Get the attached object */ 446104470Siwasaki 447104470Siwasaki ObjDesc = AcpiNsGetAttachedObject (Node); 448104470Siwasaki if (!ObjDesc) 449104470Siwasaki { 450104470Siwasaki /* No object, use the NS node type */ 451104470Siwasaki 452104470Siwasaki Type = AcpiNsGetType (Node); 453104470Siwasaki goto Exit; 454104470Siwasaki } 455104470Siwasaki 456104470Siwasaki /* Check for circular references */ 457104470Siwasaki 458104470Siwasaki if (ObjDesc == Operand) 459104470Siwasaki { 460104470Siwasaki return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE); 461104470Siwasaki } 462104470Siwasaki break; 463104470Siwasaki 464104470Siwasaki 465104470Siwasaki case AML_INDEX_OP: 466104470Siwasaki 467104470Siwasaki /* Get the type of this reference (index into another object) */ 468104470Siwasaki 469104470Siwasaki Type = ObjDesc->Reference.TargetType; 470104470Siwasaki if (Type != ACPI_TYPE_PACKAGE) 471104470Siwasaki { 472104470Siwasaki goto Exit; 473104470Siwasaki } 474104470Siwasaki 475104470Siwasaki /* 476104470Siwasaki * The main object is a package, we want to get the type 477104470Siwasaki * of the individual package element that is referenced by 478104470Siwasaki * the index. 479104470Siwasaki * 480104470Siwasaki * This could of course in turn be another reference object. 481104470Siwasaki */ 482104470Siwasaki ObjDesc = *(ObjDesc->Reference.Where); 483104470Siwasaki break; 484104470Siwasaki 485104470Siwasaki 486104470Siwasaki case AML_INT_NAMEPATH_OP: 487104470Siwasaki 488104470Siwasaki /* Dereference the reference pointer */ 489104470Siwasaki 490104470Siwasaki Node = ObjDesc->Reference.Node; 491104470Siwasaki 492104470Siwasaki /* All "References" point to a NS node */ 493104470Siwasaki 494104470Siwasaki if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED) 495104470Siwasaki { 496123315Snjl ACPI_REPORT_ERROR (("AcpiExResolveMultiple: Not a NS node %p [%s]\n", 497123315Snjl Node, AcpiUtGetDescriptorName (Node))); 498123315Snjl return_ACPI_STATUS (AE_AML_INTERNAL); 499104470Siwasaki } 500104470Siwasaki 501104470Siwasaki /* Get the attached object */ 502104470Siwasaki 503104470Siwasaki ObjDesc = AcpiNsGetAttachedObject (Node); 504104470Siwasaki if (!ObjDesc) 505104470Siwasaki { 506104470Siwasaki /* No object, use the NS node type */ 507104470Siwasaki 508104470Siwasaki Type = AcpiNsGetType (Node); 509104470Siwasaki goto Exit; 510104470Siwasaki } 511104470Siwasaki 512104470Siwasaki /* Check for circular references */ 513104470Siwasaki 514104470Siwasaki if (ObjDesc == Operand) 515104470Siwasaki { 516104470Siwasaki return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE); 517104470Siwasaki } 518104470Siwasaki break; 519104470Siwasaki 520104470Siwasaki 521104470Siwasaki case AML_DEBUG_OP: 522104470Siwasaki 523104470Siwasaki /* The Debug Object is of type "DebugObject" */ 524104470Siwasaki 525104470Siwasaki Type = ACPI_TYPE_DEBUG_OBJECT; 526104470Siwasaki goto Exit; 527104470Siwasaki 528104470Siwasaki 529104470Siwasaki default: 530104470Siwasaki 531104470Siwasaki ACPI_REPORT_ERROR (("AcpiExResolveMultiple: Unknown Reference subtype %X\n", 532104470Siwasaki ObjDesc->Reference.Opcode)); 533104470Siwasaki return_ACPI_STATUS (AE_AML_INTERNAL); 534104470Siwasaki } 535104470Siwasaki } 536104470Siwasaki 537104470Siwasaki /* 538104470Siwasaki * Now we are guaranteed to have an object that has not been created 539104470Siwasaki * via the RefOf or Index operators. 540104470Siwasaki */ 541104470Siwasaki Type = ACPI_GET_OBJECT_TYPE (ObjDesc); 542104470Siwasaki 543104470Siwasaki 544104470SiwasakiExit: 545104470Siwasaki /* Convert internal types to external types */ 546104470Siwasaki 547104470Siwasaki switch (Type) 548104470Siwasaki { 549107325Siwasaki case ACPI_TYPE_LOCAL_REGION_FIELD: 550107325Siwasaki case ACPI_TYPE_LOCAL_BANK_FIELD: 551107325Siwasaki case ACPI_TYPE_LOCAL_INDEX_FIELD: 552104470Siwasaki 553104470Siwasaki Type = ACPI_TYPE_FIELD_UNIT; 554104470Siwasaki break; 555104470Siwasaki 556107325Siwasaki case ACPI_TYPE_LOCAL_SCOPE: 557107325Siwasaki 558107325Siwasaki /* Per ACPI Specification, Scope is untyped */ 559107325Siwasaki 560107325Siwasaki Type = ACPI_TYPE_ANY; 561107325Siwasaki break; 562107325Siwasaki 563104470Siwasaki default: 564104470Siwasaki /* No change to Type required */ 565104470Siwasaki break; 566104470Siwasaki } 567104470Siwasaki 568104470Siwasaki *ReturnType = Type; 569104470Siwasaki if (ReturnDesc) 570104470Siwasaki { 571104470Siwasaki *ReturnDesc = ObjDesc; 572104470Siwasaki } 573104470Siwasaki return_ACPI_STATUS (AE_OK); 574104470Siwasaki} 575104470Siwasaki 576104470Siwasaki 577