exresolv.c revision 151937
167754Smsmith 267754Smsmith/****************************************************************************** 367754Smsmith * 477424Smsmith * Module Name: exresolv - AML Interpreter object resolution 5151937Sjkim * $Revision: 1.132 $ 667754Smsmith * 767754Smsmith *****************************************************************************/ 867754Smsmith 967754Smsmith/****************************************************************************** 1067754Smsmith * 1167754Smsmith * 1. Copyright Notice 1267754Smsmith * 13151937Sjkim * Some or all of this work - Copyright (c) 1999 - 2005, 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 120151600Sobrien#include <contrib/dev/acpica/acpi.h> 121151600Sobrien#include <contrib/dev/acpica/amlcode.h> 122151600Sobrien#include <contrib/dev/acpica/acdispat.h> 123151600Sobrien#include <contrib/dev/acpica/acinterp.h> 124151600Sobrien#include <contrib/dev/acpica/acnamesp.h> 125151600Sobrien#include <contrib/dev/acpica/acparser.h> 12667754Smsmith 12767754Smsmith 12877424Smsmith#define _COMPONENT ACPI_EXECUTER 12991116Smsmith ACPI_MODULE_NAME ("exresolv") 13067754Smsmith 131151937Sjkim/* Local prototypes */ 13267754Smsmith 133151937Sjkimstatic ACPI_STATUS 134151937SjkimAcpiExResolveObjectToValue ( 135151937Sjkim ACPI_OPERAND_OBJECT **StackPtr, 136151937Sjkim ACPI_WALK_STATE *WalkState); 137151937Sjkim 138151937Sjkim 13967754Smsmith/******************************************************************************* 14067754Smsmith * 14177424Smsmith * FUNCTION: AcpiExResolveToValue 14267754Smsmith * 14367754Smsmith * PARAMETERS: **StackPtr - Points to entry on ObjStack, which can 14477424Smsmith * be either an (ACPI_OPERAND_OBJECT *) 14567754Smsmith * or an ACPI_HANDLE. 14677424Smsmith * WalkState - Current method state 14767754Smsmith * 14867754Smsmith * RETURN: Status 14967754Smsmith * 15071867Smsmith * DESCRIPTION: Convert Reference objects to values 15167754Smsmith * 15267754Smsmith ******************************************************************************/ 15367754Smsmith 15467754SmsmithACPI_STATUS 15577424SmsmithAcpiExResolveToValue ( 15667754Smsmith ACPI_OPERAND_OBJECT **StackPtr, 15767754Smsmith ACPI_WALK_STATE *WalkState) 15867754Smsmith{ 15977424Smsmith ACPI_STATUS Status; 16067754Smsmith 16167754Smsmith 16291116Smsmith ACPI_FUNCTION_TRACE_PTR ("ExResolveToValue", StackPtr); 16367754Smsmith 16467754Smsmith 16567754Smsmith if (!StackPtr || !*StackPtr) 16667754Smsmith { 16782367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - null pointer\n")); 16867754Smsmith return_ACPI_STATUS (AE_AML_NO_OPERAND); 16967754Smsmith } 17067754Smsmith 17167754Smsmith /* 17267754Smsmith * The entity pointed to by the StackPtr can be either 17367754Smsmith * 1) A valid ACPI_OPERAND_OBJECT, or 17467754Smsmith * 2) A ACPI_NAMESPACE_NODE (NamedObj) 17567754Smsmith */ 17699679Siwasaki if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_OPERAND) 17767754Smsmith { 17877424Smsmith Status = AcpiExResolveObjectToValue (StackPtr, WalkState); 17967754Smsmith if (ACPI_FAILURE (Status)) 18067754Smsmith { 18167754Smsmith return_ACPI_STATUS (Status); 18267754Smsmith } 183151937Sjkim 184151937Sjkim if (!*StackPtr) 185151937Sjkim { 186151937Sjkim ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - null pointer\n")); 187151937Sjkim return_ACPI_STATUS (AE_AML_NO_OPERAND); 188151937Sjkim } 18967754Smsmith } 19067754Smsmith 19167754Smsmith /* 19277424Smsmith * Object on the stack may have changed if AcpiExResolveObjectToValue() 19367754Smsmith * was called (i.e., we can't use an _else_ here.) 19467754Smsmith */ 19591116Smsmith if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_NAMED) 19667754Smsmith { 19799679Siwasaki Status = AcpiExResolveNodeToValue ( 19899679Siwasaki ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, StackPtr), 19977424Smsmith WalkState); 20077424Smsmith if (ACPI_FAILURE (Status)) 20177424Smsmith { 20277424Smsmith return_ACPI_STATUS (Status); 20377424Smsmith } 20467754Smsmith } 20567754Smsmith 20699146Siwasaki ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Resolved object %p\n", *StackPtr)); 20777424Smsmith return_ACPI_STATUS (AE_OK); 20867754Smsmith} 20967754Smsmith 21067754Smsmith 21167754Smsmith/******************************************************************************* 21267754Smsmith * 21377424Smsmith * FUNCTION: AcpiExResolveObjectToValue 21467754Smsmith * 215151937Sjkim * PARAMETERS: StackPtr - Pointer to an internal object 21677424Smsmith * WalkState - Current method state 21767754Smsmith * 21867754Smsmith * RETURN: Status 21967754Smsmith * 220151937Sjkim * DESCRIPTION: Retrieve the value from an internal object. The Reference type 22167754Smsmith * uses the associated AML opcode to determine the value. 22267754Smsmith * 22367754Smsmith ******************************************************************************/ 22467754Smsmith 225151937Sjkimstatic ACPI_STATUS 22677424SmsmithAcpiExResolveObjectToValue ( 22767754Smsmith ACPI_OPERAND_OBJECT **StackPtr, 22867754Smsmith ACPI_WALK_STATE *WalkState) 22967754Smsmith{ 23077424Smsmith ACPI_STATUS Status = AE_OK; 23167754Smsmith ACPI_OPERAND_OBJECT *StackDesc; 23277424Smsmith void *TempNode; 23377424Smsmith ACPI_OPERAND_OBJECT *ObjDesc; 23467754Smsmith UINT16 Opcode; 23567754Smsmith 23667754Smsmith 23791116Smsmith ACPI_FUNCTION_TRACE ("ExResolveObjectToValue"); 23867754Smsmith 23967754Smsmith 24067754Smsmith StackDesc = *StackPtr; 24167754Smsmith 24267754Smsmith /* This is an ACPI_OPERAND_OBJECT */ 24367754Smsmith 24499679Siwasaki switch (ACPI_GET_OBJECT_TYPE (StackDesc)) 24567754Smsmith { 246107325Siwasaki case ACPI_TYPE_LOCAL_REFERENCE: 24767754Smsmith 24877424Smsmith Opcode = StackDesc->Reference.Opcode; 24967754Smsmith 25067754Smsmith switch (Opcode) 25167754Smsmith { 25267754Smsmith case AML_NAME_OP: 25367754Smsmith 25467754Smsmith /* 255151937Sjkim * Convert name reference to a namespace node 25677424Smsmith * Then, AcpiExResolveNodeToValue can be used to get the value 25767754Smsmith */ 25877424Smsmith TempNode = StackDesc->Reference.Object; 25967754Smsmith 26067754Smsmith /* Delete the Reference Object */ 26167754Smsmith 26277424Smsmith AcpiUtRemoveReference (StackDesc); 26367754Smsmith 264151937Sjkim /* Return the namespace node */ 26567754Smsmith 26677424Smsmith (*StackPtr) = TempNode; 26767754Smsmith break; 26867754Smsmith 26967754Smsmith 27067754Smsmith case AML_LOCAL_OP: 27177424Smsmith case AML_ARG_OP: 27267754Smsmith 27367754Smsmith /* 27467754Smsmith * Get the local from the method's state info 27567754Smsmith * Note: this increments the local's object reference count 27667754Smsmith */ 27777424Smsmith Status = AcpiDsMethodDataGetValue (Opcode, 27877424Smsmith StackDesc->Reference.Offset, WalkState, &ObjDesc); 27967754Smsmith if (ACPI_FAILURE (Status)) 28067754Smsmith { 28167754Smsmith return_ACPI_STATUS (Status); 28267754Smsmith } 28367754Smsmith 284129684Snjl ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Arg/Local %X] ValueObj is %p\n", 285129684Snjl StackDesc->Reference.Offset, ObjDesc)); 286129684Snjl 28767754Smsmith /* 28867754Smsmith * Now we can delete the original Reference Object and 289129684Snjl * replace it with the resolved value 29067754Smsmith */ 29177424Smsmith AcpiUtRemoveReference (StackDesc); 29267754Smsmith *StackPtr = ObjDesc; 29367754Smsmith break; 29467754Smsmith 29567754Smsmith 29667754Smsmith case AML_INDEX_OP: 29767754Smsmith 29867754Smsmith switch (StackDesc->Reference.TargetType) 29967754Smsmith { 30067754Smsmith case ACPI_TYPE_BUFFER_FIELD: 30167754Smsmith 30267754Smsmith /* Just return - leave the Reference on the stack */ 30367754Smsmith break; 30467754Smsmith 30567754Smsmith 30667754Smsmith case ACPI_TYPE_PACKAGE: 30799679Siwasaki 30867754Smsmith ObjDesc = *StackDesc->Reference.Where; 30967754Smsmith if (ObjDesc) 31067754Smsmith { 31167754Smsmith /* 31267754Smsmith * Valid obj descriptor, copy pointer to return value 31367754Smsmith * (i.e., dereference the package index) 31467754Smsmith * Delete the ref object, increment the returned object 31567754Smsmith */ 31677424Smsmith AcpiUtRemoveReference (StackDesc); 31777424Smsmith AcpiUtAddReference (ObjDesc); 31867754Smsmith *StackPtr = ObjDesc; 31967754Smsmith } 32067754Smsmith else 32167754Smsmith { 32267754Smsmith /* 32367754Smsmith * A NULL object descriptor means an unitialized element of 32477424Smsmith * the package, can't dereference it 32567754Smsmith */ 32682367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 32783174Smsmith "Attempt to deref an Index to NULL pkg element Idx=%p\n", 32877424Smsmith StackDesc)); 32967754Smsmith Status = AE_AML_UNINITIALIZED_ELEMENT; 33067754Smsmith } 33167754Smsmith break; 33267754Smsmith 33399679Siwasaki 33467754Smsmith default: 33599679Siwasaki 33677424Smsmith /* Invalid reference object */ 33767754Smsmith 338126372Snjl ACPI_REPORT_ERROR (( 339126372Snjl "During resolve, Unknown TargetType %X in Index/Reference obj %p\n", 34067754Smsmith StackDesc->Reference.TargetType, StackDesc)); 34167754Smsmith Status = AE_AML_INTERNAL; 34267754Smsmith break; 34367754Smsmith } 34467754Smsmith break; 34567754Smsmith 34667754Smsmith 347100966Siwasaki case AML_REF_OF_OP: 34867754Smsmith case AML_DEBUG_OP: 349123315Snjl case AML_LOAD_OP: 35067754Smsmith 35167754Smsmith /* Just leave the object as-is */ 352100966Siwasaki 35367754Smsmith break; 35467754Smsmith 355151937Sjkim case AML_INT_NAMEPATH_OP: /* Reference to a named object */ 35667754Smsmith 357151937Sjkim /* Get the object pointed to by the namespace node */ 358151937Sjkim 359151937Sjkim *StackPtr = (StackDesc->Reference.Node)->Object; 360151937Sjkim AcpiUtAddReference (*StackPtr); 361151937Sjkim AcpiUtRemoveReference (StackDesc); 362151937Sjkim break; 363151937Sjkim 36467754Smsmith default: 36567754Smsmith 366151937Sjkim ACPI_REPORT_ERROR (( 367151937Sjkim "During resolve, Unknown Reference opcode %X (%s) in %p\n", 368123315Snjl Opcode, AcpiPsGetOpcodeName (Opcode), StackDesc)); 36967754Smsmith Status = AE_AML_INTERNAL; 37077424Smsmith break; 37199679Siwasaki } 37299679Siwasaki break; 37367754Smsmith 37467754Smsmith 37599146Siwasaki case ACPI_TYPE_BUFFER: 37699146Siwasaki 37799146Siwasaki Status = AcpiDsGetBufferArguments (StackDesc); 37899146Siwasaki break; 37999146Siwasaki 38099146Siwasaki 38199146Siwasaki case ACPI_TYPE_PACKAGE: 38299146Siwasaki 38399146Siwasaki Status = AcpiDsGetPackageArguments (StackDesc); 38499146Siwasaki break; 38599146Siwasaki 38699146Siwasaki 387151937Sjkim /* These cases may never happen here, but just in case.. */ 388151937Sjkim 38977424Smsmith case ACPI_TYPE_BUFFER_FIELD: 390107325Siwasaki case ACPI_TYPE_LOCAL_REGION_FIELD: 391107325Siwasaki case ACPI_TYPE_LOCAL_BANK_FIELD: 392107325Siwasaki case ACPI_TYPE_LOCAL_INDEX_FIELD: 39367754Smsmith 39487031Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "FieldRead SourceDesc=%p Type=%X\n", 39599679Siwasaki StackDesc, ACPI_GET_OBJECT_TYPE (StackDesc))); 39667754Smsmith 39799146Siwasaki Status = AcpiExReadDataFromField (WalkState, StackDesc, &ObjDesc); 39867754Smsmith *StackPtr = (void *) ObjDesc; 39967754Smsmith break; 40067754Smsmith 40167754Smsmith default: 40267754Smsmith break; 40387031Smsmith } 40467754Smsmith 40567754Smsmith return_ACPI_STATUS (Status); 40667754Smsmith} 40767754Smsmith 40867754Smsmith 409104470Siwasaki/******************************************************************************* 410104470Siwasaki * 411104470Siwasaki * FUNCTION: AcpiExResolveMultiple 412104470Siwasaki * 413104470Siwasaki * PARAMETERS: WalkState - Current state (contains AML opcode) 414104470Siwasaki * Operand - Starting point for resolution 415104470Siwasaki * ReturnType - Where the object type is returned 416104470Siwasaki * ReturnDesc - Where the resolved object is returned 417104470Siwasaki * 418104470Siwasaki * RETURN: Status 419104470Siwasaki * 420104470Siwasaki * DESCRIPTION: Return the base object and type. Traverse a reference list if 421104470Siwasaki * necessary to get to the base object. 422104470Siwasaki * 423104470Siwasaki ******************************************************************************/ 424104470Siwasaki 425104470SiwasakiACPI_STATUS 426104470SiwasakiAcpiExResolveMultiple ( 427104470Siwasaki ACPI_WALK_STATE *WalkState, 428104470Siwasaki ACPI_OPERAND_OBJECT *Operand, 429104470Siwasaki ACPI_OBJECT_TYPE *ReturnType, 430104470Siwasaki ACPI_OPERAND_OBJECT **ReturnDesc) 431104470Siwasaki{ 432104470Siwasaki ACPI_OPERAND_OBJECT *ObjDesc = (void *) Operand; 433104470Siwasaki ACPI_NAMESPACE_NODE *Node; 434104470Siwasaki ACPI_OBJECT_TYPE Type; 435138287Smarks ACPI_STATUS Status; 436104470Siwasaki 437104470Siwasaki 438107325Siwasaki ACPI_FUNCTION_TRACE ("AcpiExResolveMultiple"); 439104470Siwasaki 440104470Siwasaki 441151937Sjkim /* Operand can be either a namespace node or an operand descriptor */ 442138287Smarks 443138287Smarks switch (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc)) 444138287Smarks { 445138287Smarks case ACPI_DESC_TYPE_OPERAND: 446138287Smarks Type = ObjDesc->Common.Type; 447138287Smarks break; 448138287Smarks 449138287Smarks case ACPI_DESC_TYPE_NAMED: 450138287Smarks Type = ((ACPI_NAMESPACE_NODE *) ObjDesc)->Type; 451138287Smarks ObjDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) ObjDesc); 452138287Smarks 453138287Smarks /* If we had an Alias node, use the attached object for type info */ 454138287Smarks 455138287Smarks if (Type == ACPI_TYPE_LOCAL_ALIAS) 456138287Smarks { 457138287Smarks Type = ((ACPI_NAMESPACE_NODE *) ObjDesc)->Type; 458138287Smarks ObjDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) ObjDesc); 459138287Smarks } 460138287Smarks break; 461138287Smarks 462138287Smarks default: 463138287Smarks return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 464138287Smarks } 465138287Smarks 466151937Sjkim /* If type is anything other than a reference, we are done */ 467138287Smarks 468138287Smarks if (Type != ACPI_TYPE_LOCAL_REFERENCE) 469138287Smarks { 470138287Smarks goto Exit; 471138287Smarks } 472138287Smarks 473138287Smarks /* 474104470Siwasaki * For reference objects created via the RefOf or Index operators, 475114237Snjl * we need to get to the base object (as per the ACPI specification 476114237Snjl * of the ObjectType and SizeOf operators). This means traversing 477104470Siwasaki * the list of possibly many nested references. 478104470Siwasaki */ 479107325Siwasaki while (ACPI_GET_OBJECT_TYPE (ObjDesc) == ACPI_TYPE_LOCAL_REFERENCE) 480104470Siwasaki { 481104470Siwasaki switch (ObjDesc->Reference.Opcode) 482104470Siwasaki { 483104470Siwasaki case AML_REF_OF_OP: 484104470Siwasaki 485104470Siwasaki /* Dereference the reference pointer */ 486104470Siwasaki 487104470Siwasaki Node = ObjDesc->Reference.Object; 488104470Siwasaki 489104470Siwasaki /* All "References" point to a NS node */ 490104470Siwasaki 491104470Siwasaki if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED) 492104470Siwasaki { 493151937Sjkim ACPI_REPORT_ERROR (( 494151937Sjkim "AcpiExResolveMultiple: Not a NS node %p [%s]\n", 495151937Sjkim Node, AcpiUtGetDescriptorName (Node))); 496104470Siwasaki return_ACPI_STATUS (AE_AML_INTERNAL); 497104470Siwasaki } 498104470Siwasaki 499104470Siwasaki /* Get the attached object */ 500104470Siwasaki 501104470Siwasaki ObjDesc = AcpiNsGetAttachedObject (Node); 502104470Siwasaki if (!ObjDesc) 503104470Siwasaki { 504104470Siwasaki /* No object, use the NS node type */ 505104470Siwasaki 506104470Siwasaki Type = AcpiNsGetType (Node); 507104470Siwasaki goto Exit; 508104470Siwasaki } 509104470Siwasaki 510104470Siwasaki /* Check for circular references */ 511104470Siwasaki 512104470Siwasaki if (ObjDesc == Operand) 513104470Siwasaki { 514104470Siwasaki return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE); 515104470Siwasaki } 516104470Siwasaki break; 517104470Siwasaki 518104470Siwasaki 519104470Siwasaki case AML_INDEX_OP: 520104470Siwasaki 521104470Siwasaki /* Get the type of this reference (index into another object) */ 522104470Siwasaki 523104470Siwasaki Type = ObjDesc->Reference.TargetType; 524104470Siwasaki if (Type != ACPI_TYPE_PACKAGE) 525104470Siwasaki { 526104470Siwasaki goto Exit; 527104470Siwasaki } 528104470Siwasaki 529104470Siwasaki /* 530104470Siwasaki * The main object is a package, we want to get the type 531104470Siwasaki * of the individual package element that is referenced by 532104470Siwasaki * the index. 533104470Siwasaki * 534104470Siwasaki * This could of course in turn be another reference object. 535104470Siwasaki */ 536104470Siwasaki ObjDesc = *(ObjDesc->Reference.Where); 537151937Sjkim if (!ObjDesc) 538151937Sjkim { 539151937Sjkim /* NULL package elements are allowed */ 540151937Sjkim 541151937Sjkim Type = 0; /* Uninitialized */ 542151937Sjkim goto Exit; 543151937Sjkim } 544104470Siwasaki break; 545104470Siwasaki 546104470Siwasaki 547104470Siwasaki case AML_INT_NAMEPATH_OP: 548104470Siwasaki 549104470Siwasaki /* Dereference the reference pointer */ 550104470Siwasaki 551104470Siwasaki Node = ObjDesc->Reference.Node; 552104470Siwasaki 553104470Siwasaki /* All "References" point to a NS node */ 554104470Siwasaki 555104470Siwasaki if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED) 556104470Siwasaki { 557151937Sjkim ACPI_REPORT_ERROR (( 558151937Sjkim "AcpiExResolveMultiple: Not a NS node %p [%s]\n", 559151937Sjkim Node, AcpiUtGetDescriptorName (Node))); 560123315Snjl return_ACPI_STATUS (AE_AML_INTERNAL); 561104470Siwasaki } 562104470Siwasaki 563104470Siwasaki /* Get the attached object */ 564104470Siwasaki 565104470Siwasaki ObjDesc = AcpiNsGetAttachedObject (Node); 566104470Siwasaki if (!ObjDesc) 567104470Siwasaki { 568104470Siwasaki /* No object, use the NS node type */ 569104470Siwasaki 570104470Siwasaki Type = AcpiNsGetType (Node); 571104470Siwasaki goto Exit; 572104470Siwasaki } 573104470Siwasaki 574104470Siwasaki /* Check for circular references */ 575104470Siwasaki 576104470Siwasaki if (ObjDesc == Operand) 577104470Siwasaki { 578104470Siwasaki return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE); 579104470Siwasaki } 580104470Siwasaki break; 581104470Siwasaki 582104470Siwasaki 583138287Smarks case AML_LOCAL_OP: 584138287Smarks case AML_ARG_OP: 585138287Smarks 586138287Smarks if (ReturnDesc) 587138287Smarks { 588138287Smarks Status = AcpiDsMethodDataGetValue (ObjDesc->Reference.Opcode, 589151937Sjkim ObjDesc->Reference.Offset, WalkState, &ObjDesc); 590138287Smarks if (ACPI_FAILURE (Status)) 591138287Smarks { 592138287Smarks return_ACPI_STATUS (Status); 593138287Smarks } 594138287Smarks AcpiUtRemoveReference (ObjDesc); 595138287Smarks } 596138287Smarks else 597138287Smarks { 598138287Smarks Status = AcpiDsMethodDataGetNode (ObjDesc->Reference.Opcode, 599138287Smarks ObjDesc->Reference.Offset, WalkState, &Node); 600138287Smarks if (ACPI_FAILURE (Status)) 601138287Smarks { 602138287Smarks return_ACPI_STATUS (Status); 603138287Smarks } 604138287Smarks 605138287Smarks ObjDesc = AcpiNsGetAttachedObject (Node); 606138287Smarks if (!ObjDesc) 607138287Smarks { 608138287Smarks Type = ACPI_TYPE_ANY; 609138287Smarks goto Exit; 610138287Smarks } 611138287Smarks } 612138287Smarks break; 613138287Smarks 614138287Smarks 615104470Siwasaki case AML_DEBUG_OP: 616104470Siwasaki 617104470Siwasaki /* The Debug Object is of type "DebugObject" */ 618104470Siwasaki 619104470Siwasaki Type = ACPI_TYPE_DEBUG_OBJECT; 620104470Siwasaki goto Exit; 621104470Siwasaki 622104470Siwasaki 623104470Siwasaki default: 624104470Siwasaki 625151937Sjkim ACPI_REPORT_ERROR (( 626151937Sjkim "AcpiExResolveMultiple: Unknown Reference subtype %X\n", 627104470Siwasaki ObjDesc->Reference.Opcode)); 628104470Siwasaki return_ACPI_STATUS (AE_AML_INTERNAL); 629104470Siwasaki } 630104470Siwasaki } 631104470Siwasaki 632104470Siwasaki /* 633104470Siwasaki * Now we are guaranteed to have an object that has not been created 634104470Siwasaki * via the RefOf or Index operators. 635104470Siwasaki */ 636104470Siwasaki Type = ACPI_GET_OBJECT_TYPE (ObjDesc); 637104470Siwasaki 638104470Siwasaki 639104470SiwasakiExit: 640104470Siwasaki /* Convert internal types to external types */ 641104470Siwasaki 642104470Siwasaki switch (Type) 643104470Siwasaki { 644107325Siwasaki case ACPI_TYPE_LOCAL_REGION_FIELD: 645107325Siwasaki case ACPI_TYPE_LOCAL_BANK_FIELD: 646107325Siwasaki case ACPI_TYPE_LOCAL_INDEX_FIELD: 647104470Siwasaki 648104470Siwasaki Type = ACPI_TYPE_FIELD_UNIT; 649104470Siwasaki break; 650104470Siwasaki 651107325Siwasaki case ACPI_TYPE_LOCAL_SCOPE: 652107325Siwasaki 653107325Siwasaki /* Per ACPI Specification, Scope is untyped */ 654107325Siwasaki 655107325Siwasaki Type = ACPI_TYPE_ANY; 656107325Siwasaki break; 657107325Siwasaki 658104470Siwasaki default: 659104470Siwasaki /* No change to Type required */ 660104470Siwasaki break; 661104470Siwasaki } 662104470Siwasaki 663104470Siwasaki *ReturnType = Type; 664104470Siwasaki if (ReturnDesc) 665104470Siwasaki { 666104470Siwasaki *ReturnDesc = ObjDesc; 667104470Siwasaki } 668104470Siwasaki return_ACPI_STATUS (AE_OK); 669104470Siwasaki} 670104470Siwasaki 671104470Siwasaki 672