reactos/drivers/bus/acpi/acpica/dispatcher/dsfield.c

   1 /******************************************************************************
   2  *
   3  * Module Name: dsfield - Dispatcher field routines
   4  *
   5  *****************************************************************************/
   6
   7 /******************************************************************************
   8  *
   9  * 1. Copyright Notice
  10  *
  11  * Some or all of this work - Copyright (c) 1999 - 2014, Intel Corp.
  12  * All rights reserved.
  13  *
  14  * 2. License
  15  *
  16  * 2.1. This is your license from Intel Corp. under its intellectual property
  17  * rights. You may have additional license terms from the party that provided
  18  * you this software, covering your right to use that party's intellectual
  19  * property rights.
  20  *
  21  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  22  * copy of the source code appearing in this file ("Covered Code") an
  23  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  24  * base code distributed originally by Intel ("Original Intel Code") to copy,
  25  * make derivatives, distribute, use and display any portion of the Covered
  26  * Code in any form, with the right to sublicense such rights; and
  27  *
  28  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  29  * license (with the right to sublicense), under only those claims of Intel
  30  * patents that are infringed by the Original Intel Code, to make, use, sell,
  31  * offer to sell, and import the Covered Code and derivative works thereof
  32  * solely to the minimum extent necessary to exercise the above copyright
  33  * license, and in no event shall the patent license extend to any additions
  34  * to or modifications of the Original Intel Code. No other license or right
  35  * is granted directly or by implication, estoppel or otherwise;
  36  *
  37  * The above copyright and patent license is granted only if the following
  38  * conditions are met:
  39  *
  40  * 3. Conditions
  41  *
  42  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  43  * Redistribution of source code of any substantial portion of the Covered
  44  * Code or modification with rights to further distribute source must include
  45  * the above Copyright Notice, the above License, this list of Conditions,
  46  * and the following Disclaimer and Export Compliance provision. In addition,
  47  * Licensee must cause all Covered Code to which Licensee contributes to
  48  * contain a file documenting the changes Licensee made to create that Covered
  49  * Code and the date of any change. Licensee must include in that file the
  50  * documentation of any changes made by any predecessor Licensee. Licensee
  51  * must include a prominent statement that the modification is derived,
  52  * directly or indirectly, from Original Intel Code.
  53  *
  54  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  55  * Redistribution of source code of any substantial portion of the Covered
  56  * Code or modification without rights to further distribute source must
  57  * include the following Disclaimer and Export Compliance provision in the
  58  * documentation and/or other materials provided with distribution. In
  59  * addition, Licensee may not authorize further sublicense of source of any
  60  * portion of the Covered Code, and must include terms to the effect that the
  61  * license from Licensee to its licensee is limited to the intellectual
  62  * property embodied in the software Licensee provides to its licensee, and
  63  * not to intellectual property embodied in modifications its licensee may
  64  * make.
  65  *
  66  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  67  * substantial portion of the Covered Code or modification must reproduce the
  68  * above Copyright Notice, and the following Disclaimer and Export Compliance
  69  * provision in the documentation and/or other materials provided with the
  70  * distribution.
  71  *
  72  * 3.4. Intel retains all right, title, and interest in and to the Original
  73  * Intel Code.
  74  *
  75  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  76  * Intel shall be used in advertising or otherwise to promote the sale, use or
  77  * other dealings in products derived from or relating to the Covered Code
  78  * without prior written authorization from Intel.
  79  *
  80  * 4. Disclaimer and Export Compliance
  81  *
  82  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  83  * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  84  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
  85  * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
  86  * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
  87  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  88  * PARTICULAR PURPOSE.
  89  *
  90  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  91  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  92  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  93  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  94  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  95  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
  96  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
  97  * LIMITED REMEDY.
  98  *
  99  * 4.3. Licensee shall not export, either directly or indirectly, any of this
 100  * software or system incorporating such software without first obtaining any
 101  * required license or other approval from the U. S. Department of Commerce or
 102  * any other agency or department of the United States Government. In the
 103  * event Licensee exports any such software from the United States or
 104  * re-exports any such software from a foreign destination, Licensee shall
 105  * ensure that the distribution and export/re-export of the software is in
 106  * compliance with all laws, regulations, orders, or other restrictions of the
 107  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
 108  * any of its subsidiaries will export/re-export any technical data, process,
 109  * software, or service, directly or indirectly, to any country for which the
 110  * United States government or any agency thereof requires an export license,
 111  * other governmental approval, or letter of assurance, without first obtaining
 112  * such license, approval or letter.
 113  *
 114  *****************************************************************************/
 115
 116 #include "acpi.h"
 117 #include "accommon.h"
 118 #include "amlcode.h"
 119 #include "acdispat.h"
 120 #include "acinterp.h"
 121 #include "acnamesp.h"
 122 #include "acparser.h"
 123
 124
 125 #define _COMPONENT          ACPI_DISPATCHER
 126         ACPI_MODULE_NAME    ("dsfield")
 127
 128 /* Local prototypes */
 129
 130 #ifdef ACPI_ASL_COMPILER
 131 #include "acdisasm.h"
 132
 133 static ACPI_STATUS
 134 AcpiDsCreateExternalRegion (
 135     ACPI_STATUS             LookupStatus,
 136     ACPI_PARSE_OBJECT       *Op,
 137     char                    *Path,
 138     ACPI_WALK_STATE         *WalkState,
 139     ACPI_NAMESPACE_NODE     **Node);
 140 #endif
 141
 142 static ACPI_STATUS
 143 AcpiDsGetFieldNames (
 144     ACPI_CREATE_FIELD_INFO  *Info,
 145     ACPI_WALK_STATE         *WalkState,
 146     ACPI_PARSE_OBJECT       *Arg);
 147
 148
 149 #ifdef ACPI_ASL_COMPILER
 150 /*******************************************************************************
 151  *
 152  * FUNCTION:    AcpiDsCreateExternalRegion (iASL Disassembler only)
 153  *
 154  * PARAMETERS:  LookupStatus    - Status from NsLookup operation
 155  *              Op              - Op containing the Field definition and args
 156  *              Path            - Pathname of the region
 157  *  `           WalkState       - Current method state
 158  *              Node            - Where the new region node is returned
 159  *
 160  * RETURN:      Status
 161  *
 162  * DESCRIPTION: Add region to the external list if NOT_FOUND. Create a new
 163  *              region node/object.
 164  *
 165  ******************************************************************************/
 166
 167 static ACPI_STATUS
 168 AcpiDsCreateExternalRegion (
 169     ACPI_STATUS             LookupStatus,
 170     ACPI_PARSE_OBJECT       *Op,
 171     char                    *Path,
 172     ACPI_WALK_STATE         *WalkState,
 173     ACPI_NAMESPACE_NODE     **Node)
 174 {
 175     ACPI_STATUS             Status;
 176     ACPI_OPERAND_OBJECT     *ObjDesc;
 177
 178
 179     if (LookupStatus != AE_NOT_FOUND)
 180     {
 181         return (LookupStatus);
 182     }
 183
 184     /*
 185      * Table disassembly:
 186      * OperationRegion not found. Generate an External for it, and
 187      * insert the name into the namespace.
 188      */
 189     AcpiDmAddOpToExternalList (Op, Path, ACPI_TYPE_REGION, 0, 0);
 190     Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_REGION,
 191        ACPI_IMODE_LOAD_PASS1, ACPI_NS_SEARCH_PARENT, WalkState, Node);
 192     if (ACPI_FAILURE (Status))
 193     {
 194         return (Status);
 195     }
 196
 197     /* Must create and install a region object for the new node */
 198
 199     ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_REGION);
 200     if (!ObjDesc)
 201     {
 202         return (AE_NO_MEMORY);
 203     }
 204
 205     ObjDesc->Region.Node = *Node;
 206     Status = AcpiNsAttachObject (*Node, ObjDesc, ACPI_TYPE_REGION);
 207     return (Status);
 208 }
 209 #endif
 210
 211
 212 /*******************************************************************************
 213  *
 214  * FUNCTION:    AcpiDsCreateBufferField
 215  *
 216  * PARAMETERS:  Op                  - Current parse op (CreateXXField)
 217  *              WalkState           - Current state
 218  *
 219  * RETURN:      Status
 220  *
 221  * DESCRIPTION: Execute the CreateField operators:
 222  *              CreateBitFieldOp,
 223  *              CreateByteFieldOp,
 224  *              CreateWordFieldOp,
 225  *              CreateDwordFieldOp,
 226  *              CreateQwordFieldOp,
 227  *              CreateFieldOp       (all of which define a field in a buffer)
 228  *
 229  ******************************************************************************/
 230
 231 ACPI_STATUS
 232 AcpiDsCreateBufferField (
 233     ACPI_PARSE_OBJECT       *Op,
 234     ACPI_WALK_STATE         *WalkState)
 235 {
 236     ACPI_PARSE_OBJECT       *Arg;
 237     ACPI_NAMESPACE_NODE     *Node;
 238     ACPI_STATUS             Status;
 239     ACPI_OPERAND_OBJECT     *ObjDesc;
 240     ACPI_OPERAND_OBJECT     *SecondDesc = NULL;
 241     UINT32                  Flags;
 242
 243
 244     ACPI_FUNCTION_TRACE (DsCreateBufferField);
 245
 246
 247     /*
 248      * Get the NameString argument (name of the new BufferField)
 249      */
 250     if (Op->Common.AmlOpcode == AML_CREATE_FIELD_OP)
 251     {
 252         /* For CreateField, name is the 4th argument */
 253
 254         Arg = AcpiPsGetArg (Op, 3);
 255     }
 256     else
 257     {
 258         /* For all other CreateXXXField operators, name is the 3rd argument */
 259
 260         Arg = AcpiPsGetArg (Op, 2);
 261     }
 262
 263     if (!Arg)
 264     {
 265         return_ACPI_STATUS (AE_AML_NO_OPERAND);
 266     }
 267
 268     if (WalkState->DeferredNode)
 269     {
 270         Node = WalkState->DeferredNode;
 271         Status = AE_OK;
 272     }
 273     else
 274     {
 275         /* Execute flag should always be set when this function is entered */
 276
 277         if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE))
 278         {
 279             return_ACPI_STATUS (AE_AML_INTERNAL);
 280         }
 281
 282         /* Creating new namespace node, should not already exist */
 283
 284         Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
 285                 ACPI_NS_ERROR_IF_FOUND;
 286
 287         /*
 288          * Mark node temporary if we are executing a normal control
 289          * method. (Don't mark if this is a module-level code method)
 290          */
 291         if (WalkState->MethodNode &&
 292             !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL))
 293         {
 294             Flags |= ACPI_NS_TEMPORARY;
 295         }
 296
 297         /* Enter the NameString into the namespace */
 298
 299         Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
 300                     ACPI_TYPE_ANY, ACPI_IMODE_LOAD_PASS1,
 301                     Flags, WalkState, &Node);
 302         if (ACPI_FAILURE (Status))
 303         {
 304             ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status);
 305             return_ACPI_STATUS (Status);
 306         }
 307     }
 308
 309     /*
 310      * We could put the returned object (Node) on the object stack for later,
 311      * but for now, we will put it in the "op" object that the parser uses,
 312      * so we can get it again at the end of this scope.
 313      */
 314     Op->Common.Node = Node;
 315
 316     /*
 317      * If there is no object attached to the node, this node was just created
 318      * and we need to create the field object. Otherwise, this was a lookup
 319      * of an existing node and we don't want to create the field object again.
 320      */
 321     ObjDesc = AcpiNsGetAttachedObject (Node);
 322     if (ObjDesc)
 323     {
 324         return_ACPI_STATUS (AE_OK);
 325     }
 326
 327     /*
 328      * The Field definition is not fully parsed at this time.
 329      * (We must save the address of the AML for the buffer and index operands)
 330      */
 331
 332     /* Create the buffer field object */
 333
 334     ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER_FIELD);
 335     if (!ObjDesc)
 336     {
 337         Status = AE_NO_MEMORY;
 338         goto Cleanup;
 339     }
 340
 341     /*
 342      * Remember location in AML stream of the field unit opcode and operands --
 343      * since the buffer and index operands must be evaluated.
 344      */
 345     SecondDesc                  = ObjDesc->Common.NextObject;
 346     SecondDesc->Extra.AmlStart  = Op->Named.Data;
 347     SecondDesc->Extra.AmlLength = Op->Named.Length;
 348     ObjDesc->BufferField.Node   = Node;
 349
 350     /* Attach constructed field descriptors to parent node */
 351
 352     Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_BUFFER_FIELD);
 353     if (ACPI_FAILURE (Status))
 354     {
 355         goto Cleanup;
 356     }
 357
 358
 359 Cleanup:
 360
 361     /* Remove local reference to the object */
 362
 363     AcpiUtRemoveReference (ObjDesc);
 364     return_ACPI_STATUS (Status);
 365 }
 366
 367
 368 /*******************************************************************************
 369  *
 370  * FUNCTION:    AcpiDsGetFieldNames
 371  *
 372  * PARAMETERS:  Info            - CreateField info structure
 373  *  `           WalkState       - Current method state
 374  *              Arg             - First parser arg for the field name list
 375  *
 376  * RETURN:      Status
 377  *
 378  * DESCRIPTION: Process all named fields in a field declaration. Names are
 379  *              entered into the namespace.
 380  *
 381  ******************************************************************************/
 382
 383 static ACPI_STATUS
 384 AcpiDsGetFieldNames (
 385     ACPI_CREATE_FIELD_INFO  *Info,
 386     ACPI_WALK_STATE         *WalkState,
 387     ACPI_PARSE_OBJECT       *Arg)
 388 {
 389     ACPI_STATUS             Status;
 390     UINT64                  Position;
 391     ACPI_PARSE_OBJECT       *Child;
 392
 393
 394     ACPI_FUNCTION_TRACE_PTR (DsGetFieldNames, Info);
 395
 396
 397     /* First field starts at bit zero */
 398
 399     Info->FieldBitPosition = 0;
 400
 401     /* Process all elements in the field list (of parse nodes) */
 402
 403     while (Arg)
 404     {
 405         /*
 406          * Four types of field elements are handled:
 407          * 1) Name - Enters a new named field into the namespace
 408          * 2) Offset - specifies a bit offset
 409          * 3) AccessAs - changes the access mode/attributes
 410          * 4) Connection - Associate a resource template with the field
 411          */
 412         switch (Arg->Common.AmlOpcode)
 413         {
 414         case AML_INT_RESERVEDFIELD_OP:
 415
 416             Position = (UINT64) Info->FieldBitPosition
 417                         + (UINT64) Arg->Common.Value.Size;
 418
 419             if (Position > ACPI_UINT32_MAX)
 420             {
 421                 ACPI_ERROR ((AE_INFO,
 422                     "Bit offset within field too large (> 0xFFFFFFFF)"));
 423                 return_ACPI_STATUS (AE_SUPPORT);
 424             }
 425
 426             Info->FieldBitPosition = (UINT32) Position;
 427             break;
 428
 429         case AML_INT_ACCESSFIELD_OP:
 430         case AML_INT_EXTACCESSFIELD_OP:
 431             /*
 432              * Get new AccessType, AccessAttribute, and AccessLength fields
 433              * -- to be used for all field units that follow, until the
 434              * end-of-field or another AccessAs keyword is encountered.
 435              * NOTE. These three bytes are encoded in the integer value
 436              * of the parseop for convenience.
 437              *
 438              * In FieldFlags, preserve the flag bits other than the
 439              * ACCESS_TYPE bits.
 440              */
 441
 442             /* AccessType (ByteAcc, WordAcc, etc.) */
 443
 444             Info->FieldFlags = (UINT8)
 445                 ((Info->FieldFlags & ~(AML_FIELD_ACCESS_TYPE_MASK)) |
 446                 ((UINT8) ((UINT32) (Arg->Common.Value.Integer & 0x07))));
 447
 448             /* AccessAttribute (AttribQuick, AttribByte, etc.) */
 449
 450             Info->Attribute = (UINT8) ((Arg->Common.Value.Integer >> 8) & 0xFF);
 451
 452             /* AccessLength (for serial/buffer protocols) */
 453
 454             Info->AccessLength = (UINT8) ((Arg->Common.Value.Integer >> 16) & 0xFF);
 455             break;
 456
 457         case AML_INT_CONNECTION_OP:
 458             /*
 459              * Clear any previous connection. New connection is used for all
 460              * fields that follow, similar to AccessAs
 461              */
 462             Info->ResourceBuffer = NULL;
 463             Info->ConnectionNode = NULL;
 464             Info->PinNumberIndex = 0;
 465
 466             /*
 467              * A Connection() is either an actual resource descriptor (buffer)
 468              * or a named reference to a resource template
 469              */
 470             Child = Arg->Common.Value.Arg;
 471             if (Child->Common.AmlOpcode == AML_INT_BYTELIST_OP)
 472             {
 473                 Info->ResourceBuffer = Child->Named.Data;
 474                 Info->ResourceLength = (UINT16) Child->Named.Value.Integer;
 475             }
 476             else
 477             {
 478                 /* Lookup the Connection() namepath, it should already exist */
 479
 480                 Status = AcpiNsLookup (WalkState->ScopeInfo,
 481                             Child->Common.Value.Name, ACPI_TYPE_ANY,
 482                             ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE,
 483                             WalkState, &Info->ConnectionNode);
 484                 if (ACPI_FAILURE (Status))
 485                 {
 486                     ACPI_ERROR_NAMESPACE (Child->Common.Value.Name, Status);
 487                     return_ACPI_STATUS (Status);
 488                 }
 489             }
 490             break;
 491
 492         case AML_INT_NAMEDFIELD_OP:
 493
 494             /* Lookup the name, it should already exist */
 495
 496             Status = AcpiNsLookup (WalkState->ScopeInfo,
 497                         (char *) &Arg->Named.Name, Info->FieldType,
 498                         ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE,
 499                         WalkState, &Info->FieldNode);
 500             if (ACPI_FAILURE (Status))
 501             {
 502                 ACPI_ERROR_NAMESPACE ((char *) &Arg->Named.Name, Status);
 503                 return_ACPI_STATUS (Status);
 504             }
 505             else
 506             {
 507                 Arg->Common.Node = Info->FieldNode;
 508                 Info->FieldBitLength = Arg->Common.Value.Size;
 509
 510                 /*
 511                  * If there is no object attached to the node, this node was
 512                  * just created and we need to create the field object.
 513                  * Otherwise, this was a lookup of an existing node and we
 514                  * don't want to create the field object again.
 515                  */
 516                 if (!AcpiNsGetAttachedObject (Info->FieldNode))
 517                 {
 518                     Status = AcpiExPrepFieldValue (Info);
 519                     if (ACPI_FAILURE (Status))
 520                     {
 521                         return_ACPI_STATUS (Status);
 522                     }
 523                 }
 524             }
 525
 526             /* Keep track of bit position for the next field */
 527
 528             Position = (UINT64) Info->FieldBitPosition
 529                         + (UINT64) Arg->Common.Value.Size;
 530
 531             if (Position > ACPI_UINT32_MAX)
 532             {
 533                 ACPI_ERROR ((AE_INFO,
 534                     "Field [%4.4s] bit offset too large (> 0xFFFFFFFF)",
 535                     ACPI_CAST_PTR (char, &Info->FieldNode->Name)));
 536                 return_ACPI_STATUS (AE_SUPPORT);
 537             }
 538
 539             Info->FieldBitPosition += Info->FieldBitLength;
 540             Info->PinNumberIndex++; /* Index relative to previous Connection() */
 541             break;
 542
 543         default:
 544
 545             ACPI_ERROR ((AE_INFO,
 546                 "Invalid opcode in field list: 0x%X", Arg->Common.AmlOpcode));
 547             return_ACPI_STATUS (AE_AML_BAD_OPCODE);
 548         }
 549
 550         Arg = Arg->Common.Next;
 551     }
 552
 553     return_ACPI_STATUS (AE_OK);
 554 }
 555
 556
 557 /*******************************************************************************
 558  *
 559  * FUNCTION:    AcpiDsCreateField
 560  *
 561  * PARAMETERS:  Op              - Op containing the Field definition and args
 562  *              RegionNode      - Object for the containing Operation Region
 563  *  `           WalkState       - Current method state
 564  *
 565  * RETURN:      Status
 566  *
 567  * DESCRIPTION: Create a new field in the specified operation region
 568  *
 569  ******************************************************************************/
 570
 571 ACPI_STATUS
 572 AcpiDsCreateField (
 573     ACPI_PARSE_OBJECT       *Op,
 574     ACPI_NAMESPACE_NODE     *RegionNode,
 575     ACPI_WALK_STATE         *WalkState)
 576 {
 577     ACPI_STATUS             Status;
 578     ACPI_PARSE_OBJECT       *Arg;
 579     ACPI_CREATE_FIELD_INFO  Info;
 580
 581
 582     ACPI_FUNCTION_TRACE_PTR (DsCreateField, Op);
 583
 584
 585     /* First arg is the name of the parent OpRegion (must already exist) */
 586
 587     Arg = Op->Common.Value.Arg;
 588
 589     if (!RegionNode)
 590     {
 591         Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name,
 592                         ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE,
 593                         ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode);
 594 #ifdef ACPI_ASL_COMPILER
 595         Status = AcpiDsCreateExternalRegion (Status, Arg,
 596             Arg->Common.Value.Name, WalkState, &RegionNode);
 597 #endif
 598         if (ACPI_FAILURE (Status))
 599         {
 600             ACPI_ERROR_NAMESPACE (Arg->Common.Value.Name, Status);
 601             return_ACPI_STATUS (Status);
 602         }
 603     }
 604
 605     ACPI_MEMSET (&Info, 0, sizeof (ACPI_CREATE_FIELD_INFO));
 606
 607     /* Second arg is the field flags */
 608
 609     Arg = Arg->Common.Next;
 610     Info.FieldFlags = (UINT8) Arg->Common.Value.Integer;
 611     Info.Attribute = 0;
 612
 613     /* Each remaining arg is a Named Field */
 614
 615     Info.FieldType = ACPI_TYPE_LOCAL_REGION_FIELD;
 616     Info.RegionNode = RegionNode;
 617
 618     Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next);
 619     return_ACPI_STATUS (Status);
 620 }
 621
 622
 623 /*******************************************************************************
 624  *
 625  * FUNCTION:    AcpiDsInitFieldObjects
 626  *
 627  * PARAMETERS:  Op              - Op containing the Field definition and args
 628  *  `           WalkState       - Current method state
 629  *
 630  * RETURN:      Status
 631  *
 632  * DESCRIPTION: For each "Field Unit" name in the argument list that is
 633  *              part of the field declaration, enter the name into the
 634  *              namespace.
 635  *
 636  ******************************************************************************/
 637
 638 ACPI_STATUS
 639 AcpiDsInitFieldObjects (
 640     ACPI_PARSE_OBJECT       *Op,
 641     ACPI_WALK_STATE         *WalkState)
 642 {
 643     ACPI_STATUS             Status;
 644     ACPI_PARSE_OBJECT       *Arg = NULL;
 645     ACPI_NAMESPACE_NODE     *Node;
 646     UINT8                   Type = 0;
 647     UINT32                  Flags;
 648
 649
 650     ACPI_FUNCTION_TRACE_PTR (DsInitFieldObjects, Op);
 651
 652
 653     /* Execute flag should always be set when this function is entered */
 654
 655     if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE))
 656     {
 657         if (WalkState->ParseFlags & ACPI_PARSE_DEFERRED_OP)
 658         {
 659             /* BankField Op is deferred, just return OK */
 660
 661             return_ACPI_STATUS (AE_OK);
 662         }
 663
 664         return_ACPI_STATUS (AE_AML_INTERNAL);
 665     }
 666
 667     /*
 668      * Get the FieldList argument for this opcode. This is the start of the
 669      * list of field elements.
 670      */
 671     switch (WalkState->Opcode)
 672     {
 673     case AML_FIELD_OP:
 674
 675         Arg = AcpiPsGetArg (Op, 2);
 676         Type = ACPI_TYPE_LOCAL_REGION_FIELD;
 677         break;
 678
 679     case AML_BANK_FIELD_OP:
 680
 681         Arg = AcpiPsGetArg (Op, 4);
 682         Type = ACPI_TYPE_LOCAL_BANK_FIELD;
 683         break;
 684
 685     case AML_INDEX_FIELD_OP:
 686
 687         Arg = AcpiPsGetArg (Op, 3);
 688         Type = ACPI_TYPE_LOCAL_INDEX_FIELD;
 689         break;
 690
 691     default:
 692
 693         return_ACPI_STATUS (AE_BAD_PARAMETER);
 694     }
 695
 696     /* Creating new namespace node(s), should not already exist */
 697
 698     Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
 699             ACPI_NS_ERROR_IF_FOUND;
 700
 701     /*
 702      * Mark node(s) temporary if we are executing a normal control
 703      * method. (Don't mark if this is a module-level code method)
 704      */
 705     if (WalkState->MethodNode &&
 706         !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL))
 707     {
 708         Flags |= ACPI_NS_TEMPORARY;
 709     }
 710
 711     /*
 712      * Walk the list of entries in the FieldList
 713      * Note: FieldList can be of zero length. In this case, Arg will be NULL.
 714      */
 715     while (Arg)
 716     {
 717         /*
 718          * Ignore OFFSET/ACCESSAS/CONNECTION terms here; we are only interested
 719          * in the field names in order to enter them into the namespace.
 720          */
 721         if (Arg->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP)
 722         {
 723             Status = AcpiNsLookup (WalkState->ScopeInfo,
 724                         (char *) &Arg->Named.Name, Type, ACPI_IMODE_LOAD_PASS1,
 725                         Flags, WalkState, &Node);
 726             if (ACPI_FAILURE (Status))
 727             {
 728                 ACPI_ERROR_NAMESPACE ((char *) &Arg->Named.Name, Status);
 729                 if (Status != AE_ALREADY_EXISTS)
 730                 {
 731                     return_ACPI_STATUS (Status);
 732                 }
 733
 734                 /* Name already exists, just ignore this error */
 735
 736                 Status = AE_OK;
 737             }
 738
 739             Arg->Common.Node = Node;
 740         }
 741
 742         /* Get the next field element in the list */
 743
 744         Arg = Arg->Common.Next;
 745     }
 746
 747     return_ACPI_STATUS (AE_OK);
 748 }
 749
 750
 751 /*******************************************************************************
 752  *
 753  * FUNCTION:    AcpiDsCreateBankField
 754  *
 755  * PARAMETERS:  Op              - Op containing the Field definition and args
 756  *              RegionNode      - Object for the containing Operation Region
 757  *              WalkState       - Current method state
 758  *
 759  * RETURN:      Status
 760  *
 761  * DESCRIPTION: Create a new bank field in the specified operation region
 762  *
 763  ******************************************************************************/
 764
 765 ACPI_STATUS
 766 AcpiDsCreateBankField (
 767     ACPI_PARSE_OBJECT       *Op,
 768     ACPI_NAMESPACE_NODE     *RegionNode,
 769     ACPI_WALK_STATE         *WalkState)
 770 {
 771     ACPI_STATUS             Status;
 772     ACPI_PARSE_OBJECT       *Arg;
 773     ACPI_CREATE_FIELD_INFO  Info;
 774
 775
 776     ACPI_FUNCTION_TRACE_PTR (DsCreateBankField, Op);
 777
 778
 779     /* First arg is the name of the parent OpRegion (must already exist) */
 780
 781     Arg = Op->Common.Value.Arg;
 782     if (!RegionNode)
 783     {
 784         Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name,
 785                         ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE,
 786                         ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode);
 787 #ifdef ACPI_ASL_COMPILER
 788         Status = AcpiDsCreateExternalRegion (Status, Arg,
 789             Arg->Common.Value.Name, WalkState, &RegionNode);
 790 #endif
 791         if (ACPI_FAILURE (Status))
 792         {
 793             ACPI_ERROR_NAMESPACE (Arg->Common.Value.Name, Status);
 794             return_ACPI_STATUS (Status);
 795         }
 796     }
 797
 798     /* Second arg is the Bank Register (Field) (must already exist) */
 799
 800     Arg = Arg->Common.Next;
 801     Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
 802                     ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
 803                     ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode);
 804     if (ACPI_FAILURE (Status))
 805     {
 806         ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status);
 807         return_ACPI_STATUS (Status);
 808     }
 809
 810     /*
 811      * Third arg is the BankValue
 812      * This arg is a TermArg, not a constant
 813      * It will be evaluated later, by AcpiDsEvalBankFieldOperands
 814      */
 815     Arg = Arg->Common.Next;
 816
 817     /* Fourth arg is the field flags */
 818
 819     Arg = Arg->Common.Next;
 820     Info.FieldFlags = (UINT8) Arg->Common.Value.Integer;
 821
 822     /* Each remaining arg is a Named Field */
 823
 824     Info.FieldType = ACPI_TYPE_LOCAL_BANK_FIELD;
 825     Info.RegionNode = RegionNode;
 826
 827     /*
 828      * Use Info.DataRegisterNode to store BankField Op
 829      * It's safe because DataRegisterNode will never be used when create bank field
 830      * We store AmlStart and AmlLength in the BankField Op for late evaluation
 831      * Used in AcpiExPrepFieldValue(Info)
 832      *
 833      * TBD: Or, should we add a field in ACPI_CREATE_FIELD_INFO, like "void *ParentOp"?
 834      */
 835     Info.DataRegisterNode = (ACPI_NAMESPACE_NODE*) Op;
 836
 837     Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next);
 838     return_ACPI_STATUS (Status);
 839 }
 840
 841
 842 /*******************************************************************************
 843  *
 844  * FUNCTION:    AcpiDsCreateIndexField
 845  *
 846  * PARAMETERS:  Op              - Op containing the Field definition and args
 847  *              RegionNode      - Object for the containing Operation Region
 848  *  `           WalkState       - Current method state
 849  *
 850  * RETURN:      Status
 851  *
 852  * DESCRIPTION: Create a new index field in the specified operation region
 853  *
 854  ******************************************************************************/
 855
 856 ACPI_STATUS
 857 AcpiDsCreateIndexField (
 858     ACPI_PARSE_OBJECT       *Op,
 859     ACPI_NAMESPACE_NODE     *RegionNode,
 860     ACPI_WALK_STATE         *WalkState)
 861 {
 862     ACPI_STATUS             Status;
 863     ACPI_PARSE_OBJECT       *Arg;
 864     ACPI_CREATE_FIELD_INFO  Info;
 865
 866
 867     ACPI_FUNCTION_TRACE_PTR (DsCreateIndexField, Op);
 868
 869
 870     /* First arg is the name of the Index register (must already exist) */
 871
 872     Arg = Op->Common.Value.Arg;
 873     Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
 874                     ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
 875                     ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode);
 876     if (ACPI_FAILURE (Status))
 877     {
 878         ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status);
 879         return_ACPI_STATUS (Status);
 880     }
 881
 882     /* Second arg is the data register (must already exist) */
 883
 884     Arg = Arg->Common.Next;
 885     Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
 886                     ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
 887                     ACPI_NS_SEARCH_PARENT, WalkState, &Info.DataRegisterNode);
 888     if (ACPI_FAILURE (Status))
 889     {
 890         ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status);
 891         return_ACPI_STATUS (Status);
 892     }
 893
 894     /* Next arg is the field flags */
 895
 896     Arg = Arg->Common.Next;
 897     Info.FieldFlags = (UINT8) Arg->Common.Value.Integer;
 898
 899     /* Each remaining arg is a Named Field */
 900
 901     Info.FieldType = ACPI_TYPE_LOCAL_INDEX_FIELD;
 902     Info.RegionNode = RegionNode;
 903
 904     Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next);
 905     return_ACPI_STATUS (Status);
 906 }