err.no Git - linux-2.6/blob - drivers/acpi/dispatcher/dsobject.c

   1 /******************************************************************************
   2  *
   3  * Module Name: dsobject - Dispatcher object management routines
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2006, R. Byron Moore
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions, and the following disclaimer,
  16  *    without modification.
  17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18  *    substantially similar to the "NO WARRANTY" disclaimer below
  19  *    ("Disclaimer") and any redistribution must be conditioned upon
  20  *    including a substantially similar Disclaimer requirement for further
  21  *    binary redistribution.
  22  * 3. Neither the names of the above-listed copyright holders nor the names
  23  *    of any contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * Alternatively, this software may be distributed under the terms of the
  27  * GNU General Public License ("GPL") version 2 as published by the Free
  28  * Software Foundation.
  29  *
  30  * NO WARRANTY
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGES.
  42  */
  43
  44 #include <acpi/acpi.h>
  45 #include <acpi/acparser.h>
  46 #include <acpi/amlcode.h>
  47 #include <acpi/acdispat.h>
  48 #include <acpi/acnamesp.h>
  49 #include <acpi/acinterp.h>
  50
  51 #define _COMPONENT          ACPI_DISPATCHER
  52 ACPI_MODULE_NAME("dsobject")
  53
  54 /* Local prototypes */
  55 static acpi_status
  56 acpi_ds_build_internal_object(struct acpi_walk_state *walk_state,
  57                               union acpi_parse_object *op,
  58                               union acpi_operand_object **obj_desc_ptr);
  59
  60 #ifndef ACPI_NO_METHOD_EXECUTION
  61 /*******************************************************************************
  62  *
  63  * FUNCTION:    acpi_ds_build_internal_object
  64  *
  65  * PARAMETERS:  walk_state      - Current walk state
  66  *              Op              - Parser object to be translated
  67  *              obj_desc_ptr    - Where the ACPI internal object is returned
  68  *
  69  * RETURN:      Status
  70  *
  71  * DESCRIPTION: Translate a parser Op object to the equivalent namespace object
  72  *              Simple objects are any objects other than a package object!
  73  *
  74  ******************************************************************************/
  75
  76 static acpi_status
  77 acpi_ds_build_internal_object(struct acpi_walk_state *walk_state,
  78                               union acpi_parse_object *op,
  79                               union acpi_operand_object **obj_desc_ptr)
  80 {
  81         union acpi_operand_object *obj_desc;
  82         acpi_status status;
  83
  84         ACPI_FUNCTION_TRACE(ds_build_internal_object);
  85
  86         *obj_desc_ptr = NULL;
  87         if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
  88                 /*
  89                  * This is a named object reference. If this name was
  90                  * previously looked up in the namespace, it was stored in this op.
  91                  * Otherwise, go ahead and look it up now
  92                  */
  93                 if (!op->common.node) {
  94                         status = acpi_ns_lookup(walk_state->scope_info,
  95                                                 op->common.value.string,
  96                                                 ACPI_TYPE_ANY,
  97                                                 ACPI_IMODE_EXECUTE,
  98                                                 ACPI_NS_SEARCH_PARENT |
  99                                                 ACPI_NS_DONT_OPEN_SCOPE, NULL,
 100                                                 ACPI_CAST_INDIRECT_PTR(struct
 101                                                                        acpi_namespace_node,
 102                                                                        &(op->
 103                                                                          common.
 104                                                                          node)));
 105                         if (ACPI_FAILURE(status)) {
 106
 107                                 /* Check if we are resolving a named reference within a package */
 108
 109                                 if ((status == AE_NOT_FOUND)
 110                                     && (acpi_gbl_enable_interpreter_slack)
 111                                     &&
 112                                     ((op->common.parent->common.aml_opcode ==
 113                                       AML_PACKAGE_OP)
 114                                      || (op->common.parent->common.aml_opcode ==
 115                                          AML_VAR_PACKAGE_OP))) {
 116                                         /*
 117                                          * We didn't find the target and we are populating elements
 118                                          * of a package - ignore if slack enabled. Some ASL code
 119                                          * contains dangling invalid references in packages and
 120                                          * expects that no exception will be issued. Leave the
 121                                          * element as a null element. It cannot be used, but it
 122                                          * can be overwritten by subsequent ASL code - this is
 123                                          * typically the case.
 124                                          */
 125                                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 126                                                           "Ignoring unresolved reference in package [%4.4s]\n",
 127                                                           walk_state->
 128                                                           scope_info->scope.
 129                                                           node->name.ascii));
 130
 131                                         return_ACPI_STATUS(AE_OK);
 132                                 } else {
 133                                         ACPI_ERROR_NAMESPACE(op->common.value.
 134                                                              string, status);
 135                                 }
 136
 137                                 return_ACPI_STATUS(status);
 138                         }
 139                 }
 140         }
 141
 142         /* Create and init a new internal ACPI object */
 143
 144         obj_desc = acpi_ut_create_internal_object((acpi_ps_get_opcode_info
 145                                                    (op->common.aml_opcode))->
 146                                                   object_type);
 147         if (!obj_desc) {
 148                 return_ACPI_STATUS(AE_NO_MEMORY);
 149         }
 150
 151         status =
 152             acpi_ds_init_object_from_op(walk_state, op, op->common.aml_opcode,
 153                                         &obj_desc);
 154         if (ACPI_FAILURE(status)) {
 155                 acpi_ut_remove_reference(obj_desc);
 156                 return_ACPI_STATUS(status);
 157         }
 158
 159         *obj_desc_ptr = obj_desc;
 160         return_ACPI_STATUS(AE_OK);
 161 }
 162
 163 /*******************************************************************************
 164  *
 165  * FUNCTION:    acpi_ds_build_internal_buffer_obj
 166  *
 167  * PARAMETERS:  walk_state      - Current walk state
 168  *              Op              - Parser object to be translated
 169  *              buffer_length   - Length of the buffer
 170  *              obj_desc_ptr    - Where the ACPI internal object is returned
 171  *
 172  * RETURN:      Status
 173  *
 174  * DESCRIPTION: Translate a parser Op package object to the equivalent
 175  *              namespace object
 176  *
 177  ******************************************************************************/
 178
 179 acpi_status
 180 acpi_ds_build_internal_buffer_obj(struct acpi_walk_state *walk_state,
 181                                   union acpi_parse_object *op,
 182                                   u32 buffer_length,
 183                                   union acpi_operand_object **obj_desc_ptr)
 184 {
 185         union acpi_parse_object *arg;
 186         union acpi_operand_object *obj_desc;
 187         union acpi_parse_object *byte_list;
 188         u32 byte_list_length = 0;
 189
 190         ACPI_FUNCTION_TRACE(ds_build_internal_buffer_obj);
 191
 192         /*
 193          * If we are evaluating a Named buffer object "Name (xxxx, Buffer)".
 194          * The buffer object already exists (from the NS node), otherwise it must
 195          * be created.
 196          */
 197         obj_desc = *obj_desc_ptr;
 198         if (!obj_desc) {
 199
 200                 /* Create a new buffer object */
 201
 202                 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER);
 203                 *obj_desc_ptr = obj_desc;
 204                 if (!obj_desc) {
 205                         return_ACPI_STATUS(AE_NO_MEMORY);
 206                 }
 207         }
 208
 209         /*
 210          * Second arg is the buffer data (optional) byte_list can be either
 211          * individual bytes or a string initializer.  In either case, a
 212          * byte_list appears in the AML.
 213          */
 214         arg = op->common.value.arg;     /* skip first arg */
 215
 216         byte_list = arg->named.next;
 217         if (byte_list) {
 218                 if (byte_list->common.aml_opcode != AML_INT_BYTELIST_OP) {
 219                         ACPI_ERROR((AE_INFO,
 220                                     "Expecting bytelist, got AML opcode %X in op %p",
 221                                     byte_list->common.aml_opcode, byte_list));
 222
 223                         acpi_ut_remove_reference(obj_desc);
 224                         return (AE_TYPE);
 225                 }
 226
 227                 byte_list_length = (u32) byte_list->common.value.integer;
 228         }
 229
 230         /*
 231          * The buffer length (number of bytes) will be the larger of:
 232          * 1) The specified buffer length and
 233          * 2) The length of the initializer byte list
 234          */
 235         obj_desc->buffer.length = buffer_length;
 236         if (byte_list_length > buffer_length) {
 237                 obj_desc->buffer.length = byte_list_length;
 238         }
 239
 240         /* Allocate the buffer */
 241
 242         if (obj_desc->buffer.length == 0) {
 243                 obj_desc->buffer.pointer = NULL;
 244                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 245                                   "Buffer defined with zero length in AML, creating\n"));
 246         } else {
 247                 obj_desc->buffer.pointer =
 248                     ACPI_ALLOCATE_ZEROED(obj_desc->buffer.length);
 249                 if (!obj_desc->buffer.pointer) {
 250                         acpi_ut_delete_object_desc(obj_desc);
 251                         return_ACPI_STATUS(AE_NO_MEMORY);
 252                 }
 253
 254                 /* Initialize buffer from the byte_list (if present) */
 255
 256                 if (byte_list) {
 257                         ACPI_MEMCPY(obj_desc->buffer.pointer,
 258                                     byte_list->named.data, byte_list_length);
 259                 }
 260         }
 261
 262         obj_desc->buffer.flags |= AOPOBJ_DATA_VALID;
 263         op->common.node = (struct acpi_namespace_node *)obj_desc;
 264         return_ACPI_STATUS(AE_OK);
 265 }
 266
 267 /*******************************************************************************
 268  *
 269  * FUNCTION:    acpi_ds_build_internal_package_obj
 270  *
 271  * PARAMETERS:  walk_state      - Current walk state
 272  *              Op              - Parser object to be translated
 273  *              package_length  - Number of elements in the package
 274  *              obj_desc_ptr    - Where the ACPI internal object is returned
 275  *
 276  * RETURN:      Status
 277  *
 278  * DESCRIPTION: Translate a parser Op package object to the equivalent
 279  *              namespace object
 280  *
 281  ******************************************************************************/
 282
 283 acpi_status
 284 acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state,
 285                                    union acpi_parse_object *op,
 286                                    u32 package_length,
 287                                    union acpi_operand_object **obj_desc_ptr)
 288 {
 289         union acpi_parse_object *arg;
 290         union acpi_parse_object *parent;
 291         union acpi_operand_object *obj_desc = NULL;
 292         u32 package_list_length;
 293         acpi_status status = AE_OK;
 294         acpi_native_uint i;
 295
 296         ACPI_FUNCTION_TRACE(ds_build_internal_package_obj);
 297
 298         /* Find the parent of a possibly nested package */
 299
 300         parent = op->common.parent;
 301         while ((parent->common.aml_opcode == AML_PACKAGE_OP) ||
 302                (parent->common.aml_opcode == AML_VAR_PACKAGE_OP)) {
 303                 parent = parent->common.parent;
 304         }
 305
 306         /*
 307          * If we are evaluating a Named package object "Name (xxxx, Package)",
 308          * the package object already exists, otherwise it must be created.
 309          */
 310         obj_desc = *obj_desc_ptr;
 311         if (!obj_desc) {
 312                 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PACKAGE);
 313                 *obj_desc_ptr = obj_desc;
 314                 if (!obj_desc) {
 315                         return_ACPI_STATUS(AE_NO_MEMORY);
 316                 }
 317
 318                 obj_desc->package.node = parent->common.node;
 319         }
 320
 321         obj_desc->package.count = package_length;
 322
 323         /* Count the number of items in the package list */
 324
 325         arg = op->common.value.arg;
 326         arg = arg->common.next;
 327         for (package_list_length = 0; arg; package_list_length++) {
 328                 arg = arg->common.next;
 329         }
 330
 331         /*
 332          * The package length (number of elements) will be the greater
 333          * of the specified length and the length of the initializer list
 334          */
 335         if (package_list_length > package_length) {
 336                 obj_desc->package.count = package_list_length;
 337         }
 338
 339         /*
 340          * Allocate the pointer array (array of pointers to the
 341          * individual objects). Add an extra pointer slot so
 342          * that the list is always null terminated.
 343          */
 344         obj_desc->package.elements = ACPI_ALLOCATE_ZEROED(((acpi_size)
 345                                                            obj_desc->package.
 346                                                            count +
 347                                                            1) * sizeof(void *));
 348
 349         if (!obj_desc->package.elements) {
 350                 acpi_ut_delete_object_desc(obj_desc);
 351                 return_ACPI_STATUS(AE_NO_MEMORY);
 352         }
 353
 354         /*
 355          * Initialize all elements of the package
 356          */
 357         arg = op->common.value.arg;
 358         arg = arg->common.next;
 359         for (i = 0; arg; i++) {
 360                 if (arg->common.aml_opcode == AML_INT_RETURN_VALUE_OP) {
 361
 362                         /* Object (package or buffer) is already built */
 363
 364                         obj_desc->package.elements[i] =
 365                             ACPI_CAST_PTR(union acpi_operand_object,
 366                                           arg->common.node);
 367                 } else {
 368                         status = acpi_ds_build_internal_object(walk_state, arg,
 369                                                                &obj_desc->
 370                                                                package.
 371                                                                elements[i]);
 372                 }
 373                 arg = arg->common.next;
 374         }
 375
 376         obj_desc->package.flags |= AOPOBJ_DATA_VALID;
 377         op->common.node = (struct acpi_namespace_node *)obj_desc;
 378         return_ACPI_STATUS(status);
 379 }
 380
 381 /*******************************************************************************
 382  *
 383  * FUNCTION:    acpi_ds_create_node
 384  *
 385  * PARAMETERS:  walk_state      - Current walk state
 386  *              Node            - NS Node to be initialized
 387  *              Op              - Parser object to be translated
 388  *
 389  * RETURN:      Status
 390  *
 391  * DESCRIPTION: Create the object to be associated with a namespace node
 392  *
 393  ******************************************************************************/
 394
 395 acpi_status
 396 acpi_ds_create_node(struct acpi_walk_state *walk_state,
 397                     struct acpi_namespace_node *node,
 398                     union acpi_parse_object *op)
 399 {
 400         acpi_status status;
 401         union acpi_operand_object *obj_desc;
 402
 403         ACPI_FUNCTION_TRACE_PTR(ds_create_node, op);
 404
 405         /*
 406          * Because of the execution pass through the non-control-method
 407          * parts of the table, we can arrive here twice.  Only init
 408          * the named object node the first time through
 409          */
 410         if (acpi_ns_get_attached_object(node)) {
 411                 return_ACPI_STATUS(AE_OK);
 412         }
 413
 414         if (!op->common.value.arg) {
 415
 416                 /* No arguments, there is nothing to do */
 417
 418                 return_ACPI_STATUS(AE_OK);
 419         }
 420
 421         /* Build an internal object for the argument(s) */
 422
 423         status = acpi_ds_build_internal_object(walk_state, op->common.value.arg,
 424                                                &obj_desc);
 425         if (ACPI_FAILURE(status)) {
 426                 return_ACPI_STATUS(status);
 427         }
 428
 429         /* Re-type the object according to its argument */
 430
 431         node->type = ACPI_GET_OBJECT_TYPE(obj_desc);
 432
 433         /* Attach obj to node */
 434
 435         status = acpi_ns_attach_object(node, obj_desc, node->type);
 436
 437         /* Remove local reference to the object */
 438
 439         acpi_ut_remove_reference(obj_desc);
 440         return_ACPI_STATUS(status);
 441 }
 442
 443 #endif                          /* ACPI_NO_METHOD_EXECUTION */
 444
 445 /*******************************************************************************
 446  *
 447  * FUNCTION:    acpi_ds_init_object_from_op
 448  *
 449  * PARAMETERS:  walk_state      - Current walk state
 450  *              Op              - Parser op used to init the internal object
 451  *              Opcode          - AML opcode associated with the object
 452  *              ret_obj_desc    - Namespace object to be initialized
 453  *
 454  * RETURN:      Status
 455  *
 456  * DESCRIPTION: Initialize a namespace object from a parser Op and its
 457  *              associated arguments.  The namespace object is a more compact
 458  *              representation of the Op and its arguments.
 459  *
 460  ******************************************************************************/
 461
 462 acpi_status
 463 acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state,
 464                             union acpi_parse_object *op,
 465                             u16 opcode,
 466                             union acpi_operand_object **ret_obj_desc)
 467 {
 468         const struct acpi_opcode_info *op_info;
 469         union acpi_operand_object *obj_desc;
 470         acpi_status status = AE_OK;
 471
 472         ACPI_FUNCTION_TRACE(ds_init_object_from_op);
 473
 474         obj_desc = *ret_obj_desc;
 475         op_info = acpi_ps_get_opcode_info(opcode);
 476         if (op_info->class == AML_CLASS_UNKNOWN) {
 477
 478                 /* Unknown opcode */
 479
 480                 return_ACPI_STATUS(AE_TYPE);
 481         }
 482
 483         /* Perform per-object initialization */
 484
 485         switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
 486         case ACPI_TYPE_BUFFER:
 487
 488                 /*
 489                  * Defer evaluation of Buffer term_arg operand
 490                  */
 491                 obj_desc->buffer.node = (struct acpi_namespace_node *)
 492                     walk_state->operands[0];
 493                 obj_desc->buffer.aml_start = op->named.data;
 494                 obj_desc->buffer.aml_length = op->named.length;
 495                 break;
 496
 497         case ACPI_TYPE_PACKAGE:
 498
 499                 /*
 500                  * Defer evaluation of Package term_arg operand
 501                  */
 502                 obj_desc->package.node = (struct acpi_namespace_node *)
 503                     walk_state->operands[0];
 504                 obj_desc->package.aml_start = op->named.data;
 505                 obj_desc->package.aml_length = op->named.length;
 506                 break;
 507
 508         case ACPI_TYPE_INTEGER:
 509
 510                 switch (op_info->type) {
 511                 case AML_TYPE_CONSTANT:
 512                         /*
 513                          * Resolve AML Constants here - AND ONLY HERE!
 514                          * All constants are integers.
 515                          * We mark the integer with a flag that indicates that it started
 516                          * life as a constant -- so that stores to constants will perform
 517                          * as expected (noop). zero_op is used as a placeholder for optional
 518                          * target operands.
 519                          */
 520                         obj_desc->common.flags = AOPOBJ_AML_CONSTANT;
 521
 522                         switch (opcode) {
 523                         case AML_ZERO_OP:
 524
 525                                 obj_desc->integer.value = 0;
 526                                 break;
 527
 528                         case AML_ONE_OP:
 529
 530                                 obj_desc->integer.value = 1;
 531                                 break;
 532
 533                         case AML_ONES_OP:
 534
 535                                 obj_desc->integer.value = ACPI_INTEGER_MAX;
 536
 537                                 /* Truncate value if we are executing from a 32-bit ACPI table */
 538
 539 #ifndef ACPI_NO_METHOD_EXECUTION
 540                                 acpi_ex_truncate_for32bit_table(obj_desc);
 541 #endif
 542                                 break;
 543
 544                         case AML_REVISION_OP:
 545
 546                                 obj_desc->integer.value = ACPI_CA_VERSION;
 547                                 break;
 548
 549                         default:
 550
 551                                 ACPI_ERROR((AE_INFO,
 552                                             "Unknown constant opcode %X",
 553                                             opcode));
 554                                 status = AE_AML_OPERAND_TYPE;
 555                                 break;
 556                         }
 557                         break;
 558
 559                 case AML_TYPE_LITERAL:
 560
 561                         obj_desc->integer.value = op->common.value.integer;
 562 #ifndef ACPI_NO_METHOD_EXECUTION
 563                         acpi_ex_truncate_for32bit_table(obj_desc);
 564 #endif
 565                         break;
 566
 567                 default:
 568                         ACPI_ERROR((AE_INFO, "Unknown Integer type %X",
 569                                     op_info->type));
 570                         status = AE_AML_OPERAND_TYPE;
 571                         break;
 572                 }
 573                 break;
 574
 575         case ACPI_TYPE_STRING:
 576
 577                 obj_desc->string.pointer = op->common.value.string;
 578                 obj_desc->string.length =
 579                     (u32) ACPI_STRLEN(op->common.value.string);
 580
 581                 /*
 582                  * The string is contained in the ACPI table, don't ever try
 583                  * to delete it
 584                  */
 585                 obj_desc->common.flags |= AOPOBJ_STATIC_POINTER;
 586                 break;
 587
 588         case ACPI_TYPE_METHOD:
 589                 break;
 590
 591         case ACPI_TYPE_LOCAL_REFERENCE:
 592
 593                 switch (op_info->type) {
 594                 case AML_TYPE_LOCAL_VARIABLE:
 595
 596                         /* Split the opcode into a base opcode + offset */
 597
 598                         obj_desc->reference.opcode = AML_LOCAL_OP;
 599                         obj_desc->reference.offset = opcode - AML_LOCAL_OP;
 600
 601 #ifndef ACPI_NO_METHOD_EXECUTION
 602                         status = acpi_ds_method_data_get_node(AML_LOCAL_OP,
 603                                                               obj_desc->
 604                                                               reference.offset,
 605                                                               walk_state,
 606                                                               (struct
 607                                                                acpi_namespace_node
 608                                                                **)&obj_desc->
 609                                                               reference.object);
 610 #endif
 611                         break;
 612
 613                 case AML_TYPE_METHOD_ARGUMENT:
 614
 615                         /* Split the opcode into a base opcode + offset */
 616
 617                         obj_desc->reference.opcode = AML_ARG_OP;
 618                         obj_desc->reference.offset = opcode - AML_ARG_OP;
 619
 620 #ifndef ACPI_NO_METHOD_EXECUTION
 621                         status = acpi_ds_method_data_get_node(AML_ARG_OP,
 622                                                               obj_desc->
 623                                                               reference.offset,
 624                                                               walk_state,
 625                                                               (struct
 626                                                                acpi_namespace_node
 627                                                                **)&obj_desc->
 628                                                               reference.object);
 629 #endif
 630                         break;
 631
 632                 default:        /* Other literals, etc.. */
 633
 634                         if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
 635
 636                                 /* Node was saved in Op */
 637
 638                                 obj_desc->reference.node = op->common.node;
 639                         }
 640
 641                         obj_desc->reference.opcode = opcode;
 642                         break;
 643                 }
 644                 break;
 645
 646         default:
 647
 648                 ACPI_ERROR((AE_INFO, "Unimplemented data type: %X",
 649                             ACPI_GET_OBJECT_TYPE(obj_desc)));
 650
 651                 status = AE_AML_OPERAND_TYPE;
 652                 break;
 653         }
 654
 655         return_ACPI_STATUS(status);
 656 }