release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/acpi/acpica/utobject.c

   1 /******************************************************************************
   2  *
   3  * Module Name: utobject - ACPI object create/delete/size/cache routines
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2010, Intel Corp.
   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 "accommon.h"
  46 #include "acnamesp.h"
  47
  48 #define _COMPONENT          ACPI_UTILITIES
  49 ACPI_MODULE_NAME("utobject")
  50
  51 /* Local prototypes */
  52 static acpi_status
  53 acpi_ut_get_simple_object_size(union acpi_operand_object *obj,
  54                                acpi_size * obj_length);
  55
  56 static acpi_status
  57 acpi_ut_get_package_object_size(union acpi_operand_object *obj,
  58                                 acpi_size * obj_length);
  59
  60 static acpi_status
  61 acpi_ut_get_element_length(u8 object_type,
  62                            union acpi_operand_object *source_object,
  63                            union acpi_generic_state *state, void *context);
  64
  65 /*******************************************************************************
  66  *
  67  * FUNCTION:    acpi_ut_create_internal_object_dbg
  68  *
  69  * PARAMETERS:  module_name         - Source file name of caller
  70  *              line_number         - Line number of caller
  71  *              component_id        - Component type of caller
  72  *              Type                - ACPI Type of the new object
  73  *
  74  * RETURN:      A new internal object, null on failure
  75  *
  76  * DESCRIPTION: Create and initialize a new internal object.
  77  *
  78  * NOTE:        We always allocate the worst-case object descriptor because
  79  *              these objects are cached, and we want them to be
  80  *              one-size-satisifies-any-request.  This in itself may not be
  81  *              the most memory efficient, but the efficiency of the object
  82  *              cache should more than make up for this!
  83  *
  84  ******************************************************************************/
  85
  86 union acpi_operand_object *acpi_ut_create_internal_object_dbg(const char
  87                                                               *module_name,
  88                                                               u32 line_number,
  89                                                               u32 component_id,
  90                                                               acpi_object_type
  91                                                               type)
  92 {
  93         union acpi_operand_object *object;
  94         union acpi_operand_object *second_object;
  95
  96         ACPI_FUNCTION_TRACE_STR(ut_create_internal_object_dbg,
  97                                 acpi_ut_get_type_name(type));
  98
  99         /* Allocate the raw object descriptor */
 100
 101         object =
 102             acpi_ut_allocate_object_desc_dbg(module_name, line_number,
 103                                              component_id);
 104         if (!object) {
 105                 return_PTR(NULL);
 106         }
 107
 108         switch (type) {
 109         case ACPI_TYPE_REGION:
 110         case ACPI_TYPE_BUFFER_FIELD:
 111         case ACPI_TYPE_LOCAL_BANK_FIELD:
 112
 113                 /* These types require a secondary object */
 114
 115                 second_object = acpi_ut_allocate_object_desc_dbg(module_name,
 116                                                                  line_number,
 117                                                                  component_id);
 118                 if (!second_object) {
 119                         acpi_ut_delete_object_desc(object);
 120                         return_PTR(NULL);
 121                 }
 122
 123                 second_object->common.type = ACPI_TYPE_LOCAL_EXTRA;
 124                 second_object->common.reference_count = 1;
 125
 126                 /* Link the second object to the first */
 127
 128                 object->common.next_object = second_object;
 129                 break;
 130
 131         default:
 132                 /* All others have no secondary object */
 133                 break;
 134         }
 135
 136         /* Save the object type in the object descriptor */
 137
 138         object->common.type = (u8) type;
 139
 140         /* Init the reference count */
 141
 142         object->common.reference_count = 1;
 143
 144         /* Any per-type initialization should go here */
 145
 146         return_PTR(object);
 147 }
 148
 149 /*******************************************************************************
 150  *
 151  * FUNCTION:    acpi_ut_create_package_object
 152  *
 153  * PARAMETERS:  Count               - Number of package elements
 154  *
 155  * RETURN:      Pointer to a new Package object, null on failure
 156  *
 157  * DESCRIPTION: Create a fully initialized package object
 158  *
 159  ******************************************************************************/
 160
 161 union acpi_operand_object *acpi_ut_create_package_object(u32 count)
 162 {
 163         union acpi_operand_object *package_desc;
 164         union acpi_operand_object **package_elements;
 165
 166         ACPI_FUNCTION_TRACE_U32(ut_create_package_object, count);
 167
 168         /* Create a new Package object */
 169
 170         package_desc = acpi_ut_create_internal_object(ACPI_TYPE_PACKAGE);
 171         if (!package_desc) {
 172                 return_PTR(NULL);
 173         }
 174
 175         /*
 176          * Create the element array. Count+1 allows the array to be null
 177          * terminated.
 178          */
 179         package_elements = ACPI_ALLOCATE_ZEROED(((acpi_size) count +
 180                                                  1) * sizeof(void *));
 181         if (!package_elements) {
 182                 acpi_ut_remove_reference(package_desc);
 183                 return_PTR(NULL);
 184         }
 185
 186         package_desc->package.count = count;
 187         package_desc->package.elements = package_elements;
 188         return_PTR(package_desc);
 189 }
 190
 191 /*******************************************************************************
 192  *
 193  * FUNCTION:    acpi_ut_create_integer_object
 194  *
 195  * PARAMETERS:  initial_value       - Initial value for the integer
 196  *
 197  * RETURN:      Pointer to a new Integer object, null on failure
 198  *
 199  * DESCRIPTION: Create an initialized integer object
 200  *
 201  ******************************************************************************/
 202
 203 union acpi_operand_object *acpi_ut_create_integer_object(u64 initial_value)
 204 {
 205         union acpi_operand_object *integer_desc;
 206
 207         ACPI_FUNCTION_TRACE(ut_create_integer_object);
 208
 209         /* Create and initialize a new integer object */
 210
 211         integer_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
 212         if (!integer_desc) {
 213                 return_PTR(NULL);
 214         }
 215
 216         integer_desc->integer.value = initial_value;
 217         return_PTR(integer_desc);
 218 }
 219
 220 /*******************************************************************************
 221  *
 222  * FUNCTION:    acpi_ut_create_buffer_object
 223  *
 224  * PARAMETERS:  buffer_size            - Size of buffer to be created
 225  *
 226  * RETURN:      Pointer to a new Buffer object, null on failure
 227  *
 228  * DESCRIPTION: Create a fully initialized buffer object
 229  *
 230  ******************************************************************************/
 231
 232 union acpi_operand_object *acpi_ut_create_buffer_object(acpi_size buffer_size)
 233 {
 234         union acpi_operand_object *buffer_desc;
 235         u8 *buffer = NULL;
 236
 237         ACPI_FUNCTION_TRACE_U32(ut_create_buffer_object, buffer_size);
 238
 239         /* Create a new Buffer object */
 240
 241         buffer_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER);
 242         if (!buffer_desc) {
 243                 return_PTR(NULL);
 244         }
 245
 246         /* Create an actual buffer only if size > 0 */
 247
 248         if (buffer_size > 0) {
 249
 250                 /* Allocate the actual buffer */
 251
 252                 buffer = ACPI_ALLOCATE_ZEROED(buffer_size);
 253                 if (!buffer) {
 254                         ACPI_ERROR((AE_INFO, "Could not allocate size %u",
 255                                     (u32) buffer_size));
 256                         acpi_ut_remove_reference(buffer_desc);
 257                         return_PTR(NULL);
 258                 }
 259         }
 260
 261         /* Complete buffer object initialization */
 262
 263         buffer_desc->buffer.flags |= AOPOBJ_DATA_VALID;
 264         buffer_desc->buffer.pointer = buffer;
 265         buffer_desc->buffer.length = (u32) buffer_size;
 266
 267         /* Return the new buffer descriptor */
 268
 269         return_PTR(buffer_desc);
 270 }
 271
 272 /*******************************************************************************
 273  *
 274  * FUNCTION:    acpi_ut_create_string_object
 275  *
 276  * PARAMETERS:  string_size         - Size of string to be created. Does not
 277  *                                    include NULL terminator, this is added
 278  *                                    automatically.
 279  *
 280  * RETURN:      Pointer to a new String object
 281  *
 282  * DESCRIPTION: Create a fully initialized string object
 283  *
 284  ******************************************************************************/
 285
 286 union acpi_operand_object *acpi_ut_create_string_object(acpi_size string_size)
 287 {
 288         union acpi_operand_object *string_desc;
 289         char *string;
 290
 291         ACPI_FUNCTION_TRACE_U32(ut_create_string_object, string_size);
 292
 293         /* Create a new String object */
 294
 295         string_desc = acpi_ut_create_internal_object(ACPI_TYPE_STRING);
 296         if (!string_desc) {
 297                 return_PTR(NULL);
 298         }
 299
 300         /*
 301          * Allocate the actual string buffer -- (Size + 1) for NULL terminator.
 302          * NOTE: Zero-length strings are NULL terminated
 303          */
 304         string = ACPI_ALLOCATE_ZEROED(string_size + 1);
 305         if (!string) {
 306                 ACPI_ERROR((AE_INFO, "Could not allocate size %u",
 307                             (u32) string_size));
 308                 acpi_ut_remove_reference(string_desc);
 309                 return_PTR(NULL);
 310         }
 311
 312         /* Complete string object initialization */
 313
 314         string_desc->string.pointer = string;
 315         string_desc->string.length = (u32) string_size;
 316
 317         /* Return the new string descriptor */
 318
 319         return_PTR(string_desc);
 320 }
 321
 322 /*******************************************************************************
 323  *
 324  * FUNCTION:    acpi_ut_valid_internal_object
 325  *
 326  * PARAMETERS:  Object              - Object to be validated
 327  *
 328  * RETURN:      TRUE if object is valid, FALSE otherwise
 329  *
 330  * DESCRIPTION: Validate a pointer to be a union acpi_operand_object
 331  *
 332  ******************************************************************************/
 333
 334 u8 acpi_ut_valid_internal_object(void *object)
 335 {
 336
 337         ACPI_FUNCTION_NAME(ut_valid_internal_object);
 338
 339         /* Check for a null pointer */
 340
 341         if (!object) {
 342                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "**** Null Object Ptr\n"));
 343                 return (FALSE);
 344         }
 345
 346         /* Check the descriptor type field */
 347
 348         switch (ACPI_GET_DESCRIPTOR_TYPE(object)) {
 349         case ACPI_DESC_TYPE_OPERAND:
 350
 351                 /* The object appears to be a valid union acpi_operand_object    */
 352
 353                 return (TRUE);
 354
 355         default:
 356                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 357                                   "%p is not not an ACPI operand obj [%s]\n",
 358                                   object, acpi_ut_get_descriptor_name(object)));
 359                 break;
 360         }
 361
 362         return (FALSE);
 363 }
 364
 365 /*******************************************************************************
 366  *
 367  * FUNCTION:    acpi_ut_allocate_object_desc_dbg
 368  *
 369  * PARAMETERS:  module_name         - Caller's module name (for error output)
 370  *              line_number         - Caller's line number (for error output)
 371  *              component_id        - Caller's component ID (for error output)
 372  *
 373  * RETURN:      Pointer to newly allocated object descriptor.  Null on error
 374  *
 375  * DESCRIPTION: Allocate a new object descriptor.  Gracefully handle
 376  *              error conditions.
 377  *
 378  ******************************************************************************/
 379
 380 void *acpi_ut_allocate_object_desc_dbg(const char *module_name,
 381                                        u32 line_number, u32 component_id)
 382 {
 383         union acpi_operand_object *object;
 384
 385         ACPI_FUNCTION_TRACE(ut_allocate_object_desc_dbg);
 386
 387         object = acpi_os_acquire_object(acpi_gbl_operand_cache);
 388         if (!object) {
 389                 ACPI_ERROR((module_name, line_number,
 390                             "Could not allocate an object descriptor"));
 391
 392                 return_PTR(NULL);
 393         }
 394
 395         /* Mark the descriptor type */
 396
 397         memset(object, 0, sizeof(union acpi_operand_object));
 398         ACPI_SET_DESCRIPTOR_TYPE(object, ACPI_DESC_TYPE_OPERAND);
 399
 400         ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "%p Size %X\n",
 401                           object, (u32) sizeof(union acpi_operand_object)));
 402
 403         return_PTR(object);
 404 }
 405
 406 /*******************************************************************************
 407  *
 408  * FUNCTION:    acpi_ut_delete_object_desc
 409  *
 410  * PARAMETERS:  Object          - An Acpi internal object to be deleted
 411  *
 412  * RETURN:      None.
 413  *
 414  * DESCRIPTION: Free an ACPI object descriptor or add it to the object cache
 415  *
 416  ******************************************************************************/
 417
 418 void acpi_ut_delete_object_desc(union acpi_operand_object *object)
 419 {
 420         ACPI_FUNCTION_TRACE_PTR(ut_delete_object_desc, object);
 421
 422         /* Object must be a union acpi_operand_object    */
 423
 424         if (ACPI_GET_DESCRIPTOR_TYPE(object) != ACPI_DESC_TYPE_OPERAND) {
 425                 ACPI_ERROR((AE_INFO,
 426                             "%p is not an ACPI Operand object [%s]", object,
 427                             acpi_ut_get_descriptor_name(object)));
 428                 return_VOID;
 429         }
 430
 431         (void)acpi_os_release_object(acpi_gbl_operand_cache, object);
 432         return_VOID;
 433 }
 434
 435 /*******************************************************************************
 436  *
 437  * FUNCTION:    acpi_ut_get_simple_object_size
 438  *
 439  * PARAMETERS:  internal_object    - An ACPI operand object
 440  *              obj_length         - Where the length is returned
 441  *
 442  * RETURN:      Status
 443  *
 444  * DESCRIPTION: This function is called to determine the space required to
 445  *              contain a simple object for return to an external user.
 446  *
 447  *              The length includes the object structure plus any additional
 448  *              needed space.
 449  *
 450  ******************************************************************************/
 451
 452 static acpi_status
 453 acpi_ut_get_simple_object_size(union acpi_operand_object *internal_object,
 454                                acpi_size * obj_length)
 455 {
 456         acpi_size length;
 457         acpi_size size;
 458         acpi_status status = AE_OK;
 459
 460         ACPI_FUNCTION_TRACE_PTR(ut_get_simple_object_size, internal_object);
 461
 462         /*
 463          * Handle a null object (Could be a uninitialized package
 464          * element -- which is legal)
 465          */
 466         if (!internal_object) {
 467                 *obj_length = sizeof(union acpi_object);
 468                 return_ACPI_STATUS(AE_OK);
 469         }
 470
 471         /* Start with the length of the Acpi object */
 472
 473         length = sizeof(union acpi_object);
 474
 475         if (ACPI_GET_DESCRIPTOR_TYPE(internal_object) == ACPI_DESC_TYPE_NAMED) {
 476
 477                 /* Object is a named object (reference), just return the length */
 478
 479                 *obj_length = ACPI_ROUND_UP_TO_NATIVE_WORD(length);
 480                 return_ACPI_STATUS(status);
 481         }
 482
 483         /*
 484          * The final length depends on the object type
 485          * Strings and Buffers are packed right up against the parent object and
 486          * must be accessed bytewise or there may be alignment problems on
 487          * certain processors
 488          */
 489         switch (internal_object->common.type) {
 490         case ACPI_TYPE_STRING:
 491
 492                 length += (acpi_size) internal_object->string.length + 1;
 493                 break;
 494
 495         case ACPI_TYPE_BUFFER:
 496
 497                 length += (acpi_size) internal_object->buffer.length;
 498                 break;
 499
 500         case ACPI_TYPE_INTEGER:
 501         case ACPI_TYPE_PROCESSOR:
 502         case ACPI_TYPE_POWER:
 503
 504                 /* No extra data for these types */
 505
 506                 break;
 507
 508         case ACPI_TYPE_LOCAL_REFERENCE:
 509
 510                 switch (internal_object->reference.class) {
 511                 case ACPI_REFCLASS_NAME:
 512
 513                         /*
 514                          * Get the actual length of the full pathname to this object.
 515                          * The reference will be converted to the pathname to the object
 516                          */
 517                         size =
 518                             acpi_ns_get_pathname_length(internal_object->
 519                                                         reference.node);
 520                         if (!size) {
 521                                 return_ACPI_STATUS(AE_BAD_PARAMETER);
 522                         }
 523
 524                         length += ACPI_ROUND_UP_TO_NATIVE_WORD(size);
 525                         break;
 526
 527                 default:
 528
 529                         /*
 530                          * No other reference opcodes are supported.
 531                          * Notably, Locals and Args are not supported, but this may be
 532                          * required eventually.
 533                          */
 534                         ACPI_ERROR((AE_INFO,
 535                                     "Cannot convert to external object - "
 536                                     "unsupported Reference Class [%s] 0x%X in object %p",
 537                                     acpi_ut_get_reference_name(internal_object),
 538                                     internal_object->reference.class,
 539                                     internal_object));
 540                         status = AE_TYPE;
 541                         break;
 542                 }
 543                 break;
 544
 545         default:
 546
 547                 ACPI_ERROR((AE_INFO, "Cannot convert to external object - "
 548                             "unsupported type [%s] 0x%X in object %p",
 549                             acpi_ut_get_object_type_name(internal_object),
 550                             internal_object->common.type, internal_object));
 551                 status = AE_TYPE;
 552                 break;
 553         }
 554
 555         /*
 556          * Account for the space required by the object rounded up to the next
 557          * multiple of the machine word size.  This keeps each object aligned
 558          * on a machine word boundary. (preventing alignment faults on some
 559          * machines.)
 560          */
 561         *obj_length = ACPI_ROUND_UP_TO_NATIVE_WORD(length);
 562         return_ACPI_STATUS(status);
 563 }
 564
 565 /*******************************************************************************
 566  *
 567  * FUNCTION:    acpi_ut_get_element_length
 568  *
 569  * PARAMETERS:  acpi_pkg_callback
 570  *
 571  * RETURN:      Status
 572  *
 573  * DESCRIPTION: Get the length of one package element.
 574  *
 575  ******************************************************************************/
 576
 577 static acpi_status
 578 acpi_ut_get_element_length(u8 object_type,
 579                            union acpi_operand_object *source_object,
 580                            union acpi_generic_state *state, void *context)
 581 {
 582         acpi_status status = AE_OK;
 583         struct acpi_pkg_info *info = (struct acpi_pkg_info *)context;
 584         acpi_size object_space;
 585
 586         switch (object_type) {
 587         case ACPI_COPY_TYPE_SIMPLE:
 588
 589                 /*
 590                  * Simple object - just get the size (Null object/entry is handled
 591                  * here also) and sum it into the running package length
 592                  */
 593                 status =
 594                     acpi_ut_get_simple_object_size(source_object,
 595                                                    &object_space);
 596                 if (ACPI_FAILURE(status)) {
 597                         return (status);
 598                 }
 599
 600                 info->length += object_space;
 601                 break;
 602
 603         case ACPI_COPY_TYPE_PACKAGE:
 604
 605                 /* Package object - nothing much to do here, let the walk handle it */
 606
 607                 info->num_packages++;
 608                 state->pkg.this_target_obj = NULL;
 609                 break;
 610
 611         default:
 612
 613                 /* No other types allowed */
 614
 615                 return (AE_BAD_PARAMETER);
 616         }
 617
 618         return (status);
 619 }
 620
 621 /*******************************************************************************
 622  *
 623  * FUNCTION:    acpi_ut_get_package_object_size
 624  *
 625  * PARAMETERS:  internal_object     - An ACPI internal object
 626  *              obj_length          - Where the length is returned
 627  *
 628  * RETURN:      Status
 629  *
 630  * DESCRIPTION: This function is called to determine the space required to
 631  *              contain a package object for return to an external user.
 632  *
 633  *              This is moderately complex since a package contains other
 634  *              objects including packages.
 635  *
 636  ******************************************************************************/
 637
 638 static acpi_status
 639 acpi_ut_get_package_object_size(union acpi_operand_object *internal_object,
 640                                 acpi_size * obj_length)
 641 {
 642         acpi_status status;
 643         struct acpi_pkg_info info;
 644
 645         ACPI_FUNCTION_TRACE_PTR(ut_get_package_object_size, internal_object);
 646
 647         info.length = 0;
 648         info.object_space = 0;
 649         info.num_packages = 1;
 650
 651         status = acpi_ut_walk_package_tree(internal_object, NULL,
 652                                            acpi_ut_get_element_length, &info);
 653         if (ACPI_FAILURE(status)) {
 654                 return_ACPI_STATUS(status);
 655         }
 656
 657         /*
 658          * We have handled all of the objects in all levels of the package.
 659          * just add the length of the package objects themselves.
 660          * Round up to the next machine word.
 661          */
 662         info.length += ACPI_ROUND_UP_TO_NATIVE_WORD(sizeof(union acpi_object)) *
 663             (acpi_size) info.num_packages;
 664
 665         /* Return the total package length */
 666
 667         *obj_length = info.length;
 668         return_ACPI_STATUS(status);
 669 }
 670
 671 /*******************************************************************************
 672  *
 673  * FUNCTION:    acpi_ut_get_object_size
 674  *
 675  * PARAMETERS:  internal_object     - An ACPI internal object
 676  *              obj_length          - Where the length will be returned
 677  *
 678  * RETURN:      Status
 679  *
 680  * DESCRIPTION: This function is called to determine the space required to
 681  *              contain an object for return to an API user.
 682  *
 683  ******************************************************************************/
 684
 685 acpi_status
 686 acpi_ut_get_object_size(union acpi_operand_object *internal_object,
 687                         acpi_size * obj_length)
 688 {
 689         acpi_status status;
 690
 691         ACPI_FUNCTION_ENTRY();
 692
 693         if ((ACPI_GET_DESCRIPTOR_TYPE(internal_object) ==
 694              ACPI_DESC_TYPE_OPERAND)
 695             && (internal_object->common.type == ACPI_TYPE_PACKAGE)) {
 696                 status =
 697                     acpi_ut_get_package_object_size(internal_object,
 698                                                     obj_length);
 699         } else {
 700                 status =
 701                     acpi_ut_get_simple_object_size(internal_object, obj_length);
 702         }
 703
 704         return (status);
 705 }