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 - 2016, 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 =
 116                     acpi_ut_allocate_object_desc_dbg(module_name, 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
 133                 /* All others have no secondary object */
 134                 break;
 135         }
 136
 137         /* Save the object type in the object descriptor */
 138
 139         object->common.type = (u8) type;
 140
 141         /* Init the reference count */
 142
 143         object->common.reference_count = 1;
 144
 145         /* Any per-type initialization should go here */
 146
 147         return_PTR(object);
 148 }
 149
 150 /*******************************************************************************
 151  *
 152  * FUNCTION:    acpi_ut_create_package_object
 153  *
 154  * PARAMETERS:  count               - Number of package elements
 155  *
 156  * RETURN:      Pointer to a new Package object, null on failure
 157  *
 158  * DESCRIPTION: Create a fully initialized package object
 159  *
 160  ******************************************************************************/
 161
 162 union acpi_operand_object *acpi_ut_create_package_object(u32 count)
 163 {
 164         union acpi_operand_object *package_desc;
 165         union acpi_operand_object **package_elements;
 166
 167         ACPI_FUNCTION_TRACE_U32(ut_create_package_object, count);
 168
 169         /* Create a new Package object */
 170
 171         package_desc = acpi_ut_create_internal_object(ACPI_TYPE_PACKAGE);
 172         if (!package_desc) {
 173                 return_PTR(NULL);
 174         }
 175
 176         /*
 177          * Create the element array. Count+1 allows the array to be null
 178          * terminated.
 179          */
 180         package_elements = ACPI_ALLOCATE_ZEROED(((acpi_size)count +
 181                                                  1) * sizeof(void *));
 182         if (!package_elements) {
 183                 ACPI_FREE(package_desc);
 184                 return_PTR(NULL);
 185         }
 186
 187         package_desc->package.count = count;
 188         package_desc->package.elements = package_elements;
 189         return_PTR(package_desc);
 190 }
 191
 192 /*******************************************************************************
 193  *
 194  * FUNCTION:    acpi_ut_create_integer_object
 195  *
 196  * PARAMETERS:  initial_value       - Initial value for the integer
 197  *
 198  * RETURN:      Pointer to a new Integer object, null on failure
 199  *
 200  * DESCRIPTION: Create an initialized integer object
 201  *
 202  ******************************************************************************/
 203
 204 union acpi_operand_object *acpi_ut_create_integer_object(u64 initial_value)
 205 {
 206         union acpi_operand_object *integer_desc;
 207
 208         ACPI_FUNCTION_TRACE(ut_create_integer_object);
 209
 210         /* Create and initialize a new integer object */
 211
 212         integer_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
 213         if (!integer_desc) {
 214                 return_PTR(NULL);
 215         }
 216
 217         integer_desc->integer.value = initial_value;
 218         return_PTR(integer_desc);
 219 }
 220
 221 /*******************************************************************************
 222  *
 223  * FUNCTION:    acpi_ut_create_buffer_object
 224  *
 225  * PARAMETERS:  buffer_size            - Size of buffer to be created
 226  *
 227  * RETURN:      Pointer to a new Buffer object, null on failure
 228  *
 229  * DESCRIPTION: Create a fully initialized buffer object
 230  *
 231  ******************************************************************************/
 232
 233 union acpi_operand_object *acpi_ut_create_buffer_object(acpi_size buffer_size)
 234 {
 235         union acpi_operand_object *buffer_desc;
 236         u8 *buffer = NULL;
 237
 238         ACPI_FUNCTION_TRACE_U32(ut_create_buffer_object, buffer_size);
 239
 240         /* Create a new Buffer object */
 241
 242         buffer_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER);
 243         if (!buffer_desc) {
 244                 return_PTR(NULL);
 245         }
 246
 247         /* Create an actual buffer only if size > 0 */
 248
 249         if (buffer_size > 0) {
 250
 251                 /* Allocate the actual buffer */
 252
 253                 buffer = ACPI_ALLOCATE_ZEROED(buffer_size);
 254                 if (!buffer) {
 255                         ACPI_ERROR((AE_INFO, "Could not allocate size %u",
 256                                     (u32)buffer_size));
 257
 258                         acpi_ut_remove_reference(buffer_desc);
 259                         return_PTR(NULL);
 260                 }
 261         }
 262
 263         /* Complete buffer object initialization */
 264
 265         buffer_desc->buffer.flags |= AOPOBJ_DATA_VALID;
 266         buffer_desc->buffer.pointer = buffer;
 267         buffer_desc->buffer.length = (u32) buffer_size;
 268
 269         /* Return the new buffer descriptor */
 270
 271         return_PTR(buffer_desc);
 272 }
 273
 274 /*******************************************************************************
 275  *
 276  * FUNCTION:    acpi_ut_create_string_object
 277  *
 278  * PARAMETERS:  string_size         - Size of string to be created. Does not
 279  *                                    include NULL terminator, this is added
 280  *                                    automatically.
 281  *
 282  * RETURN:      Pointer to a new String object
 283  *
 284  * DESCRIPTION: Create a fully initialized string object
 285  *
 286  ******************************************************************************/
 287
 288 union acpi_operand_object *acpi_ut_create_string_object(acpi_size string_size)
 289 {
 290         union acpi_operand_object *string_desc;
 291         char *string;
 292
 293         ACPI_FUNCTION_TRACE_U32(ut_create_string_object, string_size);
 294
 295         /* Create a new String object */
 296
 297         string_desc = acpi_ut_create_internal_object(ACPI_TYPE_STRING);
 298         if (!string_desc) {
 299                 return_PTR(NULL);
 300         }
 301
 302         /*
 303          * Allocate the actual string buffer -- (Size + 1) for NULL terminator.
 304          * NOTE: Zero-length strings are NULL terminated
 305          */
 306         string = ACPI_ALLOCATE_ZEROED(string_size + 1);
 307         if (!string) {
 308                 ACPI_ERROR((AE_INFO, "Could not allocate size %u",
 309                             (u32)string_size));
 310
 311                 acpi_ut_remove_reference(string_desc);
 312                 return_PTR(NULL);
 313         }
 314
 315         /* Complete string object initialization */
 316
 317         string_desc->string.pointer = string;
 318         string_desc->string.length = (u32) string_size;
 319
 320         /* Return the new string descriptor */
 321
 322         return_PTR(string_desc);
 323 }
 324
 325 /*******************************************************************************
 326  *
 327  * FUNCTION:    acpi_ut_valid_internal_object
 328  *
 329  * PARAMETERS:  object              - Object to be validated
 330  *
 331  * RETURN:      TRUE if object is valid, FALSE otherwise
 332  *
 333  * DESCRIPTION: Validate a pointer to be of type union acpi_operand_object
 334  *
 335  ******************************************************************************/
 336
 337 u8 acpi_ut_valid_internal_object(void *object)
 338 {
 339
 340         ACPI_FUNCTION_NAME(ut_valid_internal_object);
 341
 342         /* Check for a null pointer */
 343
 344         if (!object) {
 345                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "**** Null Object Ptr\n"));
 346                 return (FALSE);
 347         }
 348
 349         /* Check the descriptor type field */
 350
 351         switch (ACPI_GET_DESCRIPTOR_TYPE(object)) {
 352         case ACPI_DESC_TYPE_OPERAND:
 353
 354                 /* The object appears to be a valid union acpi_operand_object */
 355
 356                 return (TRUE);
 357
 358         default:
 359
 360                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 361                                   "%p is not an ACPI operand obj [%s]\n",
 362                                   object, acpi_ut_get_descriptor_name(object)));
 363                 break;
 364         }
 365
 366         return (FALSE);
 367 }
 368
 369 /*******************************************************************************
 370  *
 371  * FUNCTION:    acpi_ut_allocate_object_desc_dbg
 372  *
 373  * PARAMETERS:  module_name         - Caller's module name (for error output)
 374  *              line_number         - Caller's line number (for error output)
 375  *              component_id        - Caller's component ID (for error output)
 376  *
 377  * RETURN:      Pointer to newly allocated object descriptor. Null on error
 378  *
 379  * DESCRIPTION: Allocate a new object descriptor. Gracefully handle
 380  *              error conditions.
 381  *
 382  ******************************************************************************/
 383
 384 void *acpi_ut_allocate_object_desc_dbg(const char *module_name,
 385                                        u32 line_number, u32 component_id)
 386 {
 387         union acpi_operand_object *object;
 388
 389         ACPI_FUNCTION_TRACE(ut_allocate_object_desc_dbg);
 390
 391         object = acpi_os_acquire_object(acpi_gbl_operand_cache);
 392         if (!object) {
 393                 ACPI_ERROR((module_name, line_number,
 394                             "Could not allocate an object descriptor"));
 395
 396                 return_PTR(NULL);
 397         }
 398
 399         /* Mark the descriptor type */
 400
 401         ACPI_SET_DESCRIPTOR_TYPE(object, ACPI_DESC_TYPE_OPERAND);
 402
 403         ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "%p Size %X\n",
 404                           object, (u32) sizeof(union acpi_operand_object)));
 405
 406         return_PTR(object);
 407 }
 408
 409 /*******************************************************************************
 410  *
 411  * FUNCTION:    acpi_ut_delete_object_desc
 412  *
 413  * PARAMETERS:  object          - An Acpi internal object to be deleted
 414  *
 415  * RETURN:      None.
 416  *
 417  * DESCRIPTION: Free an ACPI object descriptor or add it to the object cache
 418  *
 419  ******************************************************************************/
 420
 421 void acpi_ut_delete_object_desc(union acpi_operand_object *object)
 422 {
 423         ACPI_FUNCTION_TRACE_PTR(ut_delete_object_desc, object);
 424
 425         /* Object must be of type union acpi_operand_object */
 426
 427         if (ACPI_GET_DESCRIPTOR_TYPE(object) != ACPI_DESC_TYPE_OPERAND) {
 428                 ACPI_ERROR((AE_INFO,
 429                             "%p is not an ACPI Operand object [%s]", object,
 430                             acpi_ut_get_descriptor_name(object)));
 431                 return_VOID;
 432         }
 433
 434         (void)acpi_os_release_object(acpi_gbl_operand_cache, object);
 435         return_VOID;
 436 }
 437
 438 /*******************************************************************************
 439  *
 440  * FUNCTION:    acpi_ut_get_simple_object_size
 441  *
 442  * PARAMETERS:  internal_object    - An ACPI operand object
 443  *              obj_length         - Where the length is returned
 444  *
 445  * RETURN:      Status
 446  *
 447  * DESCRIPTION: This function is called to determine the space required to
 448  *              contain a simple object for return to an external user.
 449  *
 450  *              The length includes the object structure plus any additional
 451  *              needed space.
 452  *
 453  ******************************************************************************/
 454
 455 static acpi_status
 456 acpi_ut_get_simple_object_size(union acpi_operand_object *internal_object,
 457                                acpi_size *obj_length)
 458 {
 459         acpi_size length;
 460         acpi_size size;
 461         acpi_status status = AE_OK;
 462
 463         ACPI_FUNCTION_TRACE_PTR(ut_get_simple_object_size, internal_object);
 464
 465         /* Start with the length of the (external) Acpi object */
 466
 467         length = sizeof(union acpi_object);
 468
 469         /* A NULL object is allowed, can be a legal uninitialized package element */
 470
 471         if (!internal_object) {
 472         /*
 473                  * Object is NULL, just return the length of union acpi_object
 474                  * (A NULL union acpi_object is an object of all zeroes.)
 475          */
 476                 *obj_length = ACPI_ROUND_UP_TO_NATIVE_WORD(length);
 477                 return_ACPI_STATUS(AE_OK);
 478         }
 479
 480         /* A Namespace Node should never appear here */
 481
 482         if (ACPI_GET_DESCRIPTOR_TYPE(internal_object) == ACPI_DESC_TYPE_NAMED) {
 483
 484                 /* A namespace node should never get here */
 485
 486                 return_ACPI_STATUS(AE_AML_INTERNAL);
 487         }
 488
 489         /*
 490          * The final length depends on the object type
 491          * Strings and Buffers are packed right up against the parent object and
 492          * must be accessed bytewise or there may be alignment problems on
 493          * certain processors
 494          */
 495         switch (internal_object->common.type) {
 496         case ACPI_TYPE_STRING:
 497
 498                 length += (acpi_size)internal_object->string.length + 1;
 499                 break;
 500
 501         case ACPI_TYPE_BUFFER:
 502
 503                 length += (acpi_size)internal_object->buffer.length;
 504                 break;
 505
 506         case ACPI_TYPE_INTEGER:
 507         case ACPI_TYPE_PROCESSOR:
 508         case ACPI_TYPE_POWER:
 509
 510                 /* No extra data for these types */
 511
 512                 break;
 513
 514         case ACPI_TYPE_LOCAL_REFERENCE:
 515
 516                 switch (internal_object->reference.class) {
 517                 case ACPI_REFCLASS_NAME:
 518                         /*
 519                          * Get the actual length of the full pathname to this object.
 520                          * The reference will be converted to the pathname to the object
 521                          */
 522                         size =
 523                             acpi_ns_get_pathname_length(internal_object->
 524                                                         reference.node);
 525                         if (!size) {
 526                                 return_ACPI_STATUS(AE_BAD_PARAMETER);
 527                         }
 528
 529                         length += ACPI_ROUND_UP_TO_NATIVE_WORD(size);
 530                         break;
 531
 532                 default:
 533                         /*
 534                          * No other reference opcodes are supported.
 535                          * Notably, Locals and Args are not supported, but this may be
 536                          * required eventually.
 537                          */
 538                         ACPI_ERROR((AE_INFO,
 539                                     "Cannot convert to external object - "
 540                                     "unsupported Reference Class [%s] 0x%X in object %p",
 541                                     acpi_ut_get_reference_name(internal_object),
 542                                     internal_object->reference.class,
 543                                     internal_object));
 544                         status = AE_TYPE;
 545                         break;
 546                 }
 547                 break;
 548
 549         default:
 550
 551                 ACPI_ERROR((AE_INFO, "Cannot convert to external object - "
 552                             "unsupported type [%s] 0x%X in object %p",
 553                             acpi_ut_get_object_type_name(internal_object),
 554                             internal_object->common.type, internal_object));
 555                 status = AE_TYPE;
 556                 break;
 557         }
 558
 559         /*
 560          * Account for the space required by the object rounded up to the next
 561          * multiple of the machine word size. This keeps each object aligned
 562          * on a machine word boundary. (preventing alignment faults on some
 563          * machines.)
 564          */
 565         *obj_length = ACPI_ROUND_UP_TO_NATIVE_WORD(length);
 566         return_ACPI_STATUS(status);
 567 }
 568
 569 /*******************************************************************************
 570  *
 571  * FUNCTION:    acpi_ut_get_element_length
 572  *
 573  * PARAMETERS:  acpi_pkg_callback
 574  *
 575  * RETURN:      Status
 576  *
 577  * DESCRIPTION: Get the length of one package element.
 578  *
 579  ******************************************************************************/
 580
 581 static acpi_status
 582 acpi_ut_get_element_length(u8 object_type,
 583                            union acpi_operand_object *source_object,
 584                            union acpi_generic_state *state, void *context)
 585 {
 586         acpi_status status = AE_OK;
 587         struct acpi_pkg_info *info = (struct acpi_pkg_info *)context;
 588         acpi_size object_space;
 589
 590         switch (object_type) {
 591         case ACPI_COPY_TYPE_SIMPLE:
 592                 /*
 593                  * Simple object - just get the size (Null object/entry is handled
 594                  * here also) and sum it into the running package length
 595                  */
 596                 status =
 597                     acpi_ut_get_simple_object_size(source_object,
 598                                                    &object_space);
 599                 if (ACPI_FAILURE(status)) {
 600                         return (status);
 601                 }
 602
 603                 info->length += object_space;
 604                 break;
 605
 606         case ACPI_COPY_TYPE_PACKAGE:
 607
 608                 /* Package object - nothing much to do here, let the walk handle it */
 609
 610                 info->num_packages++;
 611                 state->pkg.this_target_obj = NULL;
 612                 break;
 613
 614         default:
 615
 616                 /* No other types allowed */
 617
 618                 return (AE_BAD_PARAMETER);
 619         }
 620
 621         return (status);
 622 }
 623
 624 /*******************************************************************************
 625  *
 626  * FUNCTION:    acpi_ut_get_package_object_size
 627  *
 628  * PARAMETERS:  internal_object     - An ACPI internal object
 629  *              obj_length          - Where the length is returned
 630  *
 631  * RETURN:      Status
 632  *
 633  * DESCRIPTION: This function is called to determine the space required to
 634  *              contain a package object for return to an external user.
 635  *
 636  *              This is moderately complex since a package contains other
 637  *              objects including packages.
 638  *
 639  ******************************************************************************/
 640
 641 static acpi_status
 642 acpi_ut_get_package_object_size(union acpi_operand_object *internal_object,
 643                                 acpi_size *obj_length)
 644 {
 645         acpi_status status;
 646         struct acpi_pkg_info info;
 647
 648         ACPI_FUNCTION_TRACE_PTR(ut_get_package_object_size, internal_object);
 649
 650         info.length = 0;
 651         info.object_space = 0;
 652         info.num_packages = 1;
 653
 654         status =
 655             acpi_ut_walk_package_tree(internal_object, NULL,
 656                                       acpi_ut_get_element_length, &info);
 657         if (ACPI_FAILURE(status)) {
 658                 return_ACPI_STATUS(status);
 659         }
 660
 661         /*
 662          * We have handled all of the objects in all levels of the package.
 663          * just add the length of the package objects themselves.
 664          * Round up to the next machine word.
 665          */
 666         info.length +=
 667             ACPI_ROUND_UP_TO_NATIVE_WORD(sizeof(union acpi_object)) *
 668             (acpi_size)info.num_packages;
 669
 670         /* Return the total package length */
 671
 672         *obj_length = info.length;
 673         return_ACPI_STATUS(status);
 674 }
 675
 676 /*******************************************************************************
 677  *
 678  * FUNCTION:    acpi_ut_get_object_size
 679  *
 680  * PARAMETERS:  internal_object     - An ACPI internal object
 681  *              obj_length          - Where the length will be returned
 682  *
 683  * RETURN:      Status
 684  *
 685  * DESCRIPTION: This function is called to determine the space required to
 686  *              contain an object for return to an API user.
 687  *
 688  ******************************************************************************/
 689
 690 acpi_status
 691 acpi_ut_get_object_size(union acpi_operand_object *internal_object,
 692                         acpi_size *obj_length)
 693 {
 694         acpi_status status;
 695
 696         ACPI_FUNCTION_ENTRY();
 697
 698         if ((ACPI_GET_DESCRIPTOR_TYPE(internal_object) ==
 699              ACPI_DESC_TYPE_OPERAND) &&
 700             (internal_object->common.type == ACPI_TYPE_PACKAGE)) {
 701                 status =
 702                     acpi_ut_get_package_object_size(internal_object,
 703                                                     obj_length);
 704         } else {
 705                 status =
 706                     acpi_ut_get_simple_object_size(internal_object, obj_length);
 707         }
 708
 709         return (status);
 710 }