exresolv.c revision 85756
167754Smsmith 267754Smsmith/****************************************************************************** 367754Smsmith * 477424Smsmith * Module Name: exresolv - AML Interpreter object resolution 585756Smsmith * $Revision: 101 $ 667754Smsmith * 767754Smsmith *****************************************************************************/ 867754Smsmith 967754Smsmith/****************************************************************************** 1067754Smsmith * 1167754Smsmith * 1. Copyright Notice 1267754Smsmith * 1371867Smsmith * Some or all of this work - Copyright (c) 1999, 2000, 2001, 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 "acparser.h" 12367754Smsmith#include "acdispat.h" 12467754Smsmith#include "acinterp.h" 12567754Smsmith#include "acnamesp.h" 12667754Smsmith#include "actables.h" 12767754Smsmith#include "acevents.h" 12867754Smsmith 12967754Smsmith 13077424Smsmith#define _COMPONENT ACPI_EXECUTER 13177424Smsmith MODULE_NAME ("exresolv") 13267754Smsmith 13367754Smsmith 13467754Smsmith/******************************************************************************* 13567754Smsmith * 13677424Smsmith * FUNCTION: AcpiExGetBufferFieldValue 13767754Smsmith * 13877424Smsmith * PARAMETERS: *ObjDesc - Pointer to a BufferField 13977424Smsmith * *ResultDesc - Pointer to an empty descriptor which will 14077424Smsmith * become an Integer with the field's value 14167754Smsmith * 14267754Smsmith * RETURN: Status 14367754Smsmith * 14477424Smsmith * DESCRIPTION: Retrieve the value from a BufferField 14567754Smsmith * 14667754Smsmith ******************************************************************************/ 14767754Smsmith 14867754SmsmithACPI_STATUS 14977424SmsmithAcpiExGetBufferFieldValue ( 15077424Smsmith ACPI_OPERAND_OBJECT *ObjDesc, 15167754Smsmith ACPI_OPERAND_OBJECT *ResultDesc) 15267754Smsmith{ 15377424Smsmith ACPI_STATUS Status; 15467754Smsmith UINT32 Mask; 15577424Smsmith UINT8 *Location; 15667754Smsmith 15767754Smsmith 15877424Smsmith FUNCTION_TRACE ("ExGetBufferFieldValue"); 15967754Smsmith 16067754Smsmith 16177424Smsmith /* 16277424Smsmith * Parameter validation 16377424Smsmith */ 16477424Smsmith if (!ObjDesc) 16567754Smsmith { 16682367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - null field pointer\n")); 16777424Smsmith return_ACPI_STATUS (AE_AML_NO_OPERAND); 16867754Smsmith } 16967754Smsmith 17077424Smsmith if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)) 17167754Smsmith { 17277424Smsmith Status = AcpiDsGetBufferFieldArguments (ObjDesc); 17367754Smsmith if (ACPI_FAILURE (Status)) 17467754Smsmith { 17567754Smsmith return_ACPI_STATUS (Status); 17667754Smsmith } 17767754Smsmith } 17867754Smsmith 17977424Smsmith if (!ObjDesc->BufferField.BufferObj) 18067754Smsmith { 18182367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - null container pointer\n")); 18277424Smsmith return_ACPI_STATUS (AE_AML_INTERNAL); 18367754Smsmith } 18467754Smsmith 18577424Smsmith if (ACPI_TYPE_BUFFER != ObjDesc->BufferField.BufferObj->Common.Type) 18667754Smsmith { 18782367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - container is not a Buffer\n")); 18877424Smsmith return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 18967754Smsmith } 19067754Smsmith 19177424Smsmith if (!ResultDesc) 19267754Smsmith { 19382367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - null result pointer\n")); 19477424Smsmith return_ACPI_STATUS (AE_AML_INTERNAL); 19567754Smsmith } 19667754Smsmith 19767754Smsmith 19867754Smsmith /* Field location is (base of buffer) + (byte offset) */ 19967754Smsmith 20077424Smsmith Location = ObjDesc->BufferField.BufferObj->Buffer.Pointer 20177424Smsmith + ObjDesc->BufferField.BaseByteOffset; 20267754Smsmith 20367754Smsmith /* 20467754Smsmith * Construct Mask with as many 1 bits as the field width 20567754Smsmith * 20667754Smsmith * NOTE: Only the bottom 5 bits are valid for a shift operation, so 20767754Smsmith * special care must be taken for any shift greater than 31 bits. 20867754Smsmith * 20977424Smsmith * TBD: [Unhandled] Fields greater than 32 bits will not work. 21067754Smsmith */ 21177424Smsmith if (ObjDesc->BufferField.BitLength < 32) 21267754Smsmith { 21377424Smsmith Mask = ((UINT32) 1 << ObjDesc->BufferField.BitLength) - (UINT32) 1; 21467754Smsmith } 21567754Smsmith else 21667754Smsmith { 21767754Smsmith Mask = ACPI_UINT32_MAX; 21867754Smsmith } 21967754Smsmith 22071867Smsmith ResultDesc->Integer.Type = (UINT8) ACPI_TYPE_INTEGER; 22167754Smsmith 22267754Smsmith /* Get the 32 bit value at the location */ 22367754Smsmith 22471867Smsmith MOVE_UNALIGNED32_TO_32 (&ResultDesc->Integer.Value, Location); 22567754Smsmith 22667754Smsmith /* 22767754Smsmith * Shift the 32-bit word containing the field, and mask off the 22867754Smsmith * resulting value 22967754Smsmith */ 23071867Smsmith ResultDesc->Integer.Value = 23177424Smsmith (ResultDesc->Integer.Value >> ObjDesc->BufferField.StartFieldBitOffset) & Mask; 23267754Smsmith 23382367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 23485756Smsmith "** Read from buffer %p byte %d bit %d width %d addr %p mask %08X val %8.8X%8.8X\n", 23577424Smsmith ObjDesc->BufferField.BufferObj->Buffer.Pointer, 23677424Smsmith ObjDesc->BufferField.BaseByteOffset, 23777424Smsmith ObjDesc->BufferField.StartFieldBitOffset, 23877424Smsmith ObjDesc->BufferField.BitLength, 23985756Smsmith Location, Mask, 24085756Smsmith HIDWORD(ResultDesc->Integer.Value), 24185756Smsmith LODWORD(ResultDesc->Integer.Value))); 24267754Smsmith 24377424Smsmith return_ACPI_STATUS (AE_OK); 24467754Smsmith} 24567754Smsmith 24667754Smsmith 24767754Smsmith/******************************************************************************* 24867754Smsmith * 24977424Smsmith * FUNCTION: AcpiExResolveToValue 25067754Smsmith * 25167754Smsmith * PARAMETERS: **StackPtr - Points to entry on ObjStack, which can 25277424Smsmith * be either an (ACPI_OPERAND_OBJECT *) 25367754Smsmith * or an ACPI_HANDLE. 25477424Smsmith * WalkState - Current method state 25567754Smsmith * 25667754Smsmith * RETURN: Status 25767754Smsmith * 25871867Smsmith * DESCRIPTION: Convert Reference objects to values 25967754Smsmith * 26067754Smsmith ******************************************************************************/ 26167754Smsmith 26267754SmsmithACPI_STATUS 26377424SmsmithAcpiExResolveToValue ( 26467754Smsmith ACPI_OPERAND_OBJECT **StackPtr, 26567754Smsmith ACPI_WALK_STATE *WalkState) 26667754Smsmith{ 26777424Smsmith ACPI_STATUS Status; 26867754Smsmith 26967754Smsmith 27077424Smsmith FUNCTION_TRACE_PTR ("ExResolveToValue", StackPtr); 27167754Smsmith 27267754Smsmith 27367754Smsmith if (!StackPtr || !*StackPtr) 27467754Smsmith { 27582367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - null pointer\n")); 27667754Smsmith return_ACPI_STATUS (AE_AML_NO_OPERAND); 27767754Smsmith } 27867754Smsmith 27967754Smsmith 28067754Smsmith /* 28167754Smsmith * The entity pointed to by the StackPtr can be either 28267754Smsmith * 1) A valid ACPI_OPERAND_OBJECT, or 28367754Smsmith * 2) A ACPI_NAMESPACE_NODE (NamedObj) 28467754Smsmith */ 28567754Smsmith if (VALID_DESCRIPTOR_TYPE (*StackPtr, ACPI_DESC_TYPE_INTERNAL)) 28667754Smsmith { 28777424Smsmith Status = AcpiExResolveObjectToValue (StackPtr, WalkState); 28867754Smsmith if (ACPI_FAILURE (Status)) 28967754Smsmith { 29067754Smsmith return_ACPI_STATUS (Status); 29167754Smsmith } 29267754Smsmith } 29367754Smsmith 29467754Smsmith /* 29577424Smsmith * Object on the stack may have changed if AcpiExResolveObjectToValue() 29667754Smsmith * was called (i.e., we can't use an _else_ here.) 29767754Smsmith */ 29867754Smsmith if (VALID_DESCRIPTOR_TYPE (*StackPtr, ACPI_DESC_TYPE_NAMED)) 29967754Smsmith { 30077424Smsmith Status = AcpiExResolveNodeToValue ((ACPI_NAMESPACE_NODE **) StackPtr, 30177424Smsmith WalkState); 30277424Smsmith if (ACPI_FAILURE (Status)) 30377424Smsmith { 30477424Smsmith return_ACPI_STATUS (Status); 30577424Smsmith } 30667754Smsmith } 30767754Smsmith 30867754Smsmith 30982367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Resolved object %p\n", *StackPtr)); 31077424Smsmith return_ACPI_STATUS (AE_OK); 31167754Smsmith} 31267754Smsmith 31367754Smsmith 31467754Smsmith/******************************************************************************* 31567754Smsmith * 31677424Smsmith * FUNCTION: AcpiExResolveObjectToValue 31767754Smsmith * 31867754Smsmith * PARAMETERS: StackPtr - Pointer to a stack location that contains a 31967754Smsmith * ptr to an internal object. 32077424Smsmith * WalkState - Current method state 32167754Smsmith * 32267754Smsmith * RETURN: Status 32367754Smsmith * 32467754Smsmith * DESCRIPTION: Retrieve the value from an internal object. The Reference type 32567754Smsmith * uses the associated AML opcode to determine the value. 32667754Smsmith * 32767754Smsmith ******************************************************************************/ 32867754Smsmith 32967754SmsmithACPI_STATUS 33077424SmsmithAcpiExResolveObjectToValue ( 33167754Smsmith ACPI_OPERAND_OBJECT **StackPtr, 33267754Smsmith ACPI_WALK_STATE *WalkState) 33367754Smsmith{ 33477424Smsmith ACPI_STATUS Status = AE_OK; 33567754Smsmith ACPI_OPERAND_OBJECT *StackDesc; 33677424Smsmith void *TempNode; 33777424Smsmith ACPI_OPERAND_OBJECT *ObjDesc; 33867754Smsmith UINT16 Opcode; 33967754Smsmith 34067754Smsmith 34177424Smsmith FUNCTION_TRACE ("ExResolveObjectToValue"); 34267754Smsmith 34367754Smsmith 34467754Smsmith StackDesc = *StackPtr; 34567754Smsmith 34667754Smsmith /* This is an ACPI_OPERAND_OBJECT */ 34767754Smsmith 34867754Smsmith switch (StackDesc->Common.Type) 34967754Smsmith { 35067754Smsmith 35167754Smsmith case INTERNAL_TYPE_REFERENCE: 35267754Smsmith 35377424Smsmith Opcode = StackDesc->Reference.Opcode; 35467754Smsmith 35567754Smsmith switch (Opcode) 35667754Smsmith { 35767754Smsmith 35867754Smsmith case AML_NAME_OP: 35967754Smsmith 36067754Smsmith /* 36167754Smsmith * Convert indirect name ptr to a direct name ptr. 36277424Smsmith * Then, AcpiExResolveNodeToValue can be used to get the value 36367754Smsmith */ 36477424Smsmith TempNode = StackDesc->Reference.Object; 36567754Smsmith 36667754Smsmith /* Delete the Reference Object */ 36767754Smsmith 36877424Smsmith AcpiUtRemoveReference (StackDesc); 36967754Smsmith 37067754Smsmith /* Put direct name pointer onto stack and exit */ 37167754Smsmith 37277424Smsmith (*StackPtr) = TempNode; 37367754Smsmith break; 37467754Smsmith 37567754Smsmith 37667754Smsmith case AML_LOCAL_OP: 37777424Smsmith case AML_ARG_OP: 37867754Smsmith 37967754Smsmith /* 38067754Smsmith * Get the local from the method's state info 38167754Smsmith * Note: this increments the local's object reference count 38267754Smsmith */ 38377424Smsmith Status = AcpiDsMethodDataGetValue (Opcode, 38477424Smsmith StackDesc->Reference.Offset, WalkState, &ObjDesc); 38567754Smsmith if (ACPI_FAILURE (Status)) 38667754Smsmith { 38767754Smsmith return_ACPI_STATUS (Status); 38867754Smsmith } 38967754Smsmith 39067754Smsmith /* 39167754Smsmith * Now we can delete the original Reference Object and 39267754Smsmith * replace it with the resolve value 39367754Smsmith */ 39477424Smsmith AcpiUtRemoveReference (StackDesc); 39567754Smsmith *StackPtr = ObjDesc; 39667754Smsmith 39782367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "[Arg/Local %d] ValueObj is %p\n", 39877424Smsmith StackDesc->Reference.Offset, ObjDesc)); 39967754Smsmith break; 40067754Smsmith 40167754Smsmith 40267754Smsmith /* 40384491Smsmith * For constants, we must change the reference/constant object 40484491Smsmith * to a real integer object 40567754Smsmith */ 40667754Smsmith case AML_ZERO_OP: 40784491Smsmith case AML_ONE_OP: 40884491Smsmith case AML_ONES_OP: 40984491Smsmith case AML_REVISION_OP: 41067754Smsmith 41184491Smsmith /* Create a new integer object */ 41267754Smsmith 41384491Smsmith ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 41484491Smsmith if (!ObjDesc) 41584491Smsmith { 41684491Smsmith return_ACPI_STATUS (AE_NO_MEMORY); 41784491Smsmith } 41867754Smsmith 41984491Smsmith switch (Opcode) 42084491Smsmith { 42184491Smsmith case AML_ZERO_OP: 42284491Smsmith ObjDesc->Integer.Value = 0; 42384491Smsmith break; 42467754Smsmith 42584491Smsmith case AML_ONE_OP: 42684491Smsmith ObjDesc->Integer.Value = 1; 42784491Smsmith break; 42867754Smsmith 42984491Smsmith case AML_ONES_OP: 43084491Smsmith ObjDesc->Integer.Value = ACPI_INTEGER_MAX; 43167754Smsmith 43284491Smsmith /* Truncate value if we are executing from a 32-bit ACPI table */ 43367754Smsmith 43484491Smsmith AcpiExTruncateFor32bitTable (ObjDesc, WalkState); 43584491Smsmith break; 43669450Smsmith 43784491Smsmith case AML_REVISION_OP: 43885756Smsmith ObjDesc->Integer.Value = ACPI_CA_SUPPORT_LEVEL; 43984491Smsmith break; 44084491Smsmith } 44169450Smsmith 44284491Smsmith /* 44384491Smsmith * Remove a reference from the original reference object 44484491Smsmith * and put the new object in its place 44584491Smsmith */ 44684491Smsmith AcpiUtRemoveReference (StackDesc); 44784491Smsmith *StackPtr = ObjDesc; 44867754Smsmith break; 44967754Smsmith 45067754Smsmith 45167754Smsmith case AML_INDEX_OP: 45267754Smsmith 45367754Smsmith switch (StackDesc->Reference.TargetType) 45467754Smsmith { 45567754Smsmith case ACPI_TYPE_BUFFER_FIELD: 45667754Smsmith 45767754Smsmith /* Just return - leave the Reference on the stack */ 45867754Smsmith break; 45967754Smsmith 46067754Smsmith 46167754Smsmith case ACPI_TYPE_PACKAGE: 46267754Smsmith ObjDesc = *StackDesc->Reference.Where; 46367754Smsmith if (ObjDesc) 46467754Smsmith { 46567754Smsmith /* 46667754Smsmith * Valid obj descriptor, copy pointer to return value 46767754Smsmith * (i.e., dereference the package index) 46867754Smsmith * Delete the ref object, increment the returned object 46967754Smsmith */ 47077424Smsmith AcpiUtRemoveReference (StackDesc); 47177424Smsmith AcpiUtAddReference (ObjDesc); 47267754Smsmith *StackPtr = ObjDesc; 47367754Smsmith } 47467754Smsmith 47567754Smsmith else 47667754Smsmith { 47767754Smsmith /* 47867754Smsmith * A NULL object descriptor means an unitialized element of 47977424Smsmith * the package, can't dereference it 48067754Smsmith */ 48182367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 48283174Smsmith "Attempt to deref an Index to NULL pkg element Idx=%p\n", 48377424Smsmith StackDesc)); 48467754Smsmith Status = AE_AML_UNINITIALIZED_ELEMENT; 48567754Smsmith } 48667754Smsmith break; 48767754Smsmith 48867754Smsmith default: 48977424Smsmith /* Invalid reference object */ 49067754Smsmith 49182367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 49282367Smsmith "Unknown TargetType %X in Index/Reference obj %p\n", 49367754Smsmith StackDesc->Reference.TargetType, StackDesc)); 49467754Smsmith Status = AE_AML_INTERNAL; 49567754Smsmith break; 49667754Smsmith } 49767754Smsmith 49867754Smsmith break; 49967754Smsmith 50067754Smsmith 50167754Smsmith case AML_DEBUG_OP: 50267754Smsmith 50367754Smsmith /* Just leave the object as-is */ 50467754Smsmith break; 50567754Smsmith 50667754Smsmith 50767754Smsmith default: 50867754Smsmith 50982367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown Reference object subtype %02X in %p\n", 51067754Smsmith Opcode, StackDesc)); 51167754Smsmith Status = AE_AML_INTERNAL; 51277424Smsmith break; 51367754Smsmith 51467754Smsmith } /* switch (Opcode) */ 51567754Smsmith 51667754Smsmith break; /* case INTERNAL_TYPE_REFERENCE */ 51767754Smsmith 51867754Smsmith 51977424Smsmith case ACPI_TYPE_BUFFER_FIELD: 52067754Smsmith 52177424Smsmith ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_ANY); 52267754Smsmith if (!ObjDesc) 52367754Smsmith { 52467754Smsmith return_ACPI_STATUS (AE_NO_MEMORY); 52567754Smsmith } 52667754Smsmith 52777424Smsmith Status = AcpiExGetBufferFieldValue (StackDesc, ObjDesc); 52867754Smsmith if (ACPI_FAILURE (Status)) 52967754Smsmith { 53077424Smsmith AcpiUtRemoveReference (ObjDesc); 53167754Smsmith ObjDesc = NULL; 53267754Smsmith } 53367754Smsmith 53467754Smsmith *StackPtr = (void *) ObjDesc; 53567754Smsmith break; 53667754Smsmith 53767754Smsmith 53867754Smsmith case INTERNAL_TYPE_BANK_FIELD: 53967754Smsmith 54077424Smsmith ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_ANY); 54167754Smsmith if (!ObjDesc) 54267754Smsmith { 54367754Smsmith return_ACPI_STATUS (AE_NO_MEMORY); 54467754Smsmith } 54567754Smsmith 54677424Smsmith /* TBD: WRONG! */ 54777424Smsmith 54877424Smsmith Status = AcpiExGetBufferFieldValue (StackDesc, ObjDesc); 54967754Smsmith if (ACPI_FAILURE (Status)) 55067754Smsmith { 55177424Smsmith AcpiUtRemoveReference (ObjDesc); 55267754Smsmith ObjDesc = NULL; 55367754Smsmith } 55467754Smsmith 55567754Smsmith *StackPtr = (void *) ObjDesc; 55667754Smsmith break; 55767754Smsmith 55867754Smsmith 55967754Smsmith /* TBD: [Future] - may need to handle IndexField, and DefField someday */ 56067754Smsmith 56167754Smsmith default: 56267754Smsmith 56367754Smsmith break; 56467754Smsmith 56567754Smsmith } /* switch (StackDesc->Common.Type) */ 56667754Smsmith 56767754Smsmith 56867754Smsmith return_ACPI_STATUS (Status); 56967754Smsmith} 57067754Smsmith 57167754Smsmith 572