drivers/acpi/acpica/exprep.c

   1
   2 /******************************************************************************
   3  *
   4  * Module Name: exprep - ACPI AML (p-code) execution - field prep utilities
   5  *
   6  *****************************************************************************/
   7
   8 /*
   9  * Copyright (C) 2000 - 2012, Intel Corp.
  10  * All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions, and the following disclaimer,
  17  *    without modification.
  18  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  19  *    substantially similar to the "NO WARRANTY" disclaimer below
  20  *    ("Disclaimer") and any redistribution must be conditioned upon
  21  *    including a substantially similar Disclaimer requirement for further
  22  *    binary redistribution.
  23  * 3. Neither the names of the above-listed copyright holders nor the names
  24  *    of any contributors may be used to endorse or promote products derived
  25  *    from this software without specific prior written permission.
  26  *
  27  * Alternatively, this software may be distributed under the terms of the
  28  * GNU General Public License ("GPL") version 2 as published by the Free
  29  * Software Foundation.
  30  *
  31  * NO WARRANTY
  32  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  33  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  34  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  35  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  36  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  40  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  41  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  42  * POSSIBILITY OF SUCH DAMAGES.
  43  */
  44
  45 #include <acpi/acpi.h>
  46 #include "accommon.h"
  47 #include "acinterp.h"
  48 #include "amlcode.h"
  49 #include "acnamesp.h"
  50 #include "acdispat.h"
  51
  52 #define _COMPONENT          ACPI_EXECUTER
  53 ACPI_MODULE_NAME("exprep")
  54
  55 /* Local prototypes */
  56 static u32
  57 acpi_ex_decode_field_access(union acpi_operand_object *obj_desc,
  58                             u8 field_flags, u32 * return_byte_alignment);
  59
  60 #ifdef ACPI_UNDER_DEVELOPMENT
  61
  62 static u32
  63 acpi_ex_generate_access(u32 field_bit_offset,
  64                         u32 field_bit_length, u32 region_length);
  65
  66 /*******************************************************************************
  67  *
  68  * FUNCTION:    acpi_ex_generate_access
  69  *
  70  * PARAMETERS:  field_bit_offset    - Start of field within parent region/buffer
  71  *              field_bit_length    - Length of field in bits
  72  *              region_length       - Length of parent in bytes
  73  *
  74  * RETURN:      Field granularity (8, 16, 32 or 64) and
  75  *              byte_alignment (1, 2, 3, or 4)
  76  *
  77  * DESCRIPTION: Generate an optimal access width for fields defined with the
  78  *              any_acc keyword.
  79  *
  80  * NOTE: Need to have the region_length in order to check for boundary
  81  *       conditions (end-of-region).  However, the region_length is a deferred
  82  *       operation.  Therefore, to complete this implementation, the generation
  83  *       of this access width must be deferred until the region length has
  84  *       been evaluated.
  85  *
  86  ******************************************************************************/
  87
  88 static u32
  89 acpi_ex_generate_access(u32 field_bit_offset,
  90                         u32 field_bit_length, u32 region_length)
  91 {
  92         u32 field_byte_length;
  93         u32 field_byte_offset;
  94         u32 field_byte_end_offset;
  95         u32 access_byte_width;
  96         u32 field_start_offset;
  97         u32 field_end_offset;
  98         u32 minimum_access_width = 0xFFFFFFFF;
  99         u32 minimum_accesses = 0xFFFFFFFF;
 100         u32 accesses;
 101
 102         ACPI_FUNCTION_TRACE(ex_generate_access);
 103
 104         /* Round Field start offset and length to "minimal" byte boundaries */
 105
 106         field_byte_offset = ACPI_DIV_8(ACPI_ROUND_DOWN(field_bit_offset, 8));
 107         field_byte_end_offset = ACPI_DIV_8(ACPI_ROUND_UP(field_bit_length +
 108                                                          field_bit_offset, 8));
 109         field_byte_length = field_byte_end_offset - field_byte_offset;
 110
 111         ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
 112                           "Bit length %u, Bit offset %u\n",
 113                           field_bit_length, field_bit_offset));
 114
 115         ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
 116                           "Byte Length %u, Byte Offset %u, End Offset %u\n",
 117                           field_byte_length, field_byte_offset,
 118                           field_byte_end_offset));
 119
 120         /*
 121          * Iterative search for the maximum access width that is both aligned
 122          * and does not go beyond the end of the region
 123          *
 124          * Start at byte_acc and work upwards to qword_acc max. (1,2,4,8 bytes)
 125          */
 126         for (access_byte_width = 1; access_byte_width <= 8;
 127              access_byte_width <<= 1) {
 128                 /*
 129                  * 1) Round end offset up to next access boundary and make sure that
 130                  *    this does not go beyond the end of the parent region.
 131                  * 2) When the Access width is greater than the field_byte_length, we
 132                  *    are done. (This does not optimize for the perfectly aligned
 133                  *    case yet).
 134                  */
 135                 if (ACPI_ROUND_UP(field_byte_end_offset, access_byte_width) <=
 136                     region_length) {
 137                         field_start_offset =
 138                             ACPI_ROUND_DOWN(field_byte_offset,
 139                                             access_byte_width) /
 140                             access_byte_width;
 141
 142                         field_end_offset =
 143                             ACPI_ROUND_UP((field_byte_length +
 144                                            field_byte_offset),
 145                                           access_byte_width) /
 146                             access_byte_width;
 147
 148                         accesses = field_end_offset - field_start_offset;
 149
 150                         ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
 151                                           "AccessWidth %u end is within region\n",
 152                                           access_byte_width));
 153
 154                         ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
 155                                           "Field Start %u, Field End %u -- requires %u accesses\n",
 156                                           field_start_offset, field_end_offset,
 157                                           accesses));
 158
 159                         /* Single access is optimal */
 160
 161                         if (accesses <= 1) {
 162                                 ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
 163                                                   "Entire field can be accessed with one operation of size %u\n",
 164                                                   access_byte_width));
 165                                 return_VALUE(access_byte_width);
 166                         }
 167
 168                         /*
 169                          * Fits in the region, but requires more than one read/write.
 170                          * try the next wider access on next iteration
 171                          */
 172                         if (accesses < minimum_accesses) {
 173                                 minimum_accesses = accesses;
 174                                 minimum_access_width = access_byte_width;
 175                         }
 176                 } else {
 177                         ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
 178                                           "AccessWidth %u end is NOT within region\n",
 179                                           access_byte_width));
 180                         if (access_byte_width == 1) {
 181                                 ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
 182                                                   "Field goes beyond end-of-region!\n"));
 183
 184                                 /* Field does not fit in the region at all */
 185
 186                                 return_VALUE(0);
 187                         }
 188
 189                         /*
 190                          * This width goes beyond the end-of-region, back off to
 191                          * previous access
 192                          */
 193                         ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
 194                                           "Backing off to previous optimal access width of %u\n",
 195                                           minimum_access_width));
 196                         return_VALUE(minimum_access_width);
 197                 }
 198         }
 199
 200         /*
 201          * Could not read/write field with one operation,
 202          * just use max access width
 203          */
 204         ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
 205                           "Cannot access field in one operation, using width 8\n"));
 206         return_VALUE(8);
 207 }
 208 #endif                          /* ACPI_UNDER_DEVELOPMENT */
 209
 210 /*******************************************************************************
 211  *
 212  * FUNCTION:    acpi_ex_decode_field_access
 213  *
 214  * PARAMETERS:  obj_desc            - Field object
 215  *              field_flags         - Encoded fieldflags (contains access bits)
 216  *              return_byte_alignment - Where the byte alignment is returned
 217  *
 218  * RETURN:      Field granularity (8, 16, 32 or 64) and
 219  *              byte_alignment (1, 2, 3, or 4)
 220  *
 221  * DESCRIPTION: Decode the access_type bits of a field definition.
 222  *
 223  ******************************************************************************/
 224
 225 static u32
 226 acpi_ex_decode_field_access(union acpi_operand_object *obj_desc,
 227                             u8 field_flags, u32 * return_byte_alignment)
 228 {
 229         u32 access;
 230         u32 byte_alignment;
 231         u32 bit_length;
 232
 233         ACPI_FUNCTION_TRACE(ex_decode_field_access);
 234
 235         access = (field_flags & AML_FIELD_ACCESS_TYPE_MASK);
 236
 237         switch (access) {
 238         case AML_FIELD_ACCESS_ANY:
 239
 240 #ifdef ACPI_UNDER_DEVELOPMENT
 241                 byte_alignment =
 242                     acpi_ex_generate_access(obj_desc->common_field.
 243                                             start_field_bit_offset,
 244                                             obj_desc->common_field.bit_length,
 245                                             0xFFFFFFFF
 246                                             /* Temp until we pass region_length as parameter */
 247                     );
 248                 bit_length = byte_alignment * 8;
 249 #endif
 250
 251                 byte_alignment = 1;
 252                 bit_length = 8;
 253                 break;
 254
 255         case AML_FIELD_ACCESS_BYTE:
 256         case AML_FIELD_ACCESS_BUFFER:   /* ACPI 2.0 (SMBus Buffer) */
 257                 byte_alignment = 1;
 258                 bit_length = 8;
 259                 break;
 260
 261         case AML_FIELD_ACCESS_WORD:
 262                 byte_alignment = 2;
 263                 bit_length = 16;
 264                 break;
 265
 266         case AML_FIELD_ACCESS_DWORD:
 267                 byte_alignment = 4;
 268                 bit_length = 32;
 269                 break;
 270
 271         case AML_FIELD_ACCESS_QWORD:    /* ACPI 2.0 */
 272                 byte_alignment = 8;
 273                 bit_length = 64;
 274                 break;
 275
 276         default:
 277                 /* Invalid field access type */
 278
 279                 ACPI_ERROR((AE_INFO, "Unknown field access type 0x%X", access));
 280                 return_UINT32(0);
 281         }
 282
 283         if (obj_desc->common.type == ACPI_TYPE_BUFFER_FIELD) {
 284                 /*
 285                  * buffer_field access can be on any byte boundary, so the
 286                  * byte_alignment is always 1 byte -- regardless of any byte_alignment
 287                  * implied by the field access type.
 288                  */
 289                 byte_alignment = 1;
 290         }
 291
 292         *return_byte_alignment = byte_alignment;
 293         return_UINT32(bit_length);
 294 }
 295
 296 /*******************************************************************************
 297  *
 298  * FUNCTION:    acpi_ex_prep_common_field_object
 299  *
 300  * PARAMETERS:  obj_desc            - The field object
 301  *              field_flags         - Access, lock_rule, and update_rule.
 302  *                                    The format of a field_flag is described
 303  *                                    in the ACPI specification
 304  *              field_attribute     - Special attributes (not used)
 305  *              field_bit_position  - Field start position
 306  *              field_bit_length    - Field length in number of bits
 307  *
 308  * RETURN:      Status
 309  *
 310  * DESCRIPTION: Initialize the areas of the field object that are common
 311  *              to the various types of fields.  Note: This is very "sensitive"
 312  *              code because we are solving the general case for field
 313  *              alignment.
 314  *
 315  ******************************************************************************/
 316
 317 acpi_status
 318 acpi_ex_prep_common_field_object(union acpi_operand_object *obj_desc,
 319                                  u8 field_flags,
 320                                  u8 field_attribute,
 321                                  u32 field_bit_position, u32 field_bit_length)
 322 {
 323         u32 access_bit_width;
 324         u32 byte_alignment;
 325         u32 nearest_byte_address;
 326
 327         ACPI_FUNCTION_TRACE(ex_prep_common_field_object);
 328
 329         /*
 330          * Note: the structure being initialized is the
 331          * ACPI_COMMON_FIELD_INFO;  No structure fields outside of the common
 332          * area are initialized by this procedure.
 333          */
 334         obj_desc->common_field.field_flags = field_flags;
 335         obj_desc->common_field.attribute = field_attribute;
 336         obj_desc->common_field.bit_length = field_bit_length;
 337
 338         /*
 339          * Decode the access type so we can compute offsets.  The access type gives
 340          * two pieces of information - the width of each field access and the
 341          * necessary byte_alignment (address granularity) of the access.
 342          *
 343          * For any_acc, the access_bit_width is the largest width that is both
 344          * necessary and possible in an attempt to access the whole field in one
 345          * I/O operation.  However, for any_acc, the byte_alignment is always one
 346          * byte.
 347          *
 348          * For all Buffer Fields, the byte_alignment is always one byte.
 349          *
 350          * For all other access types (Byte, Word, Dword, Qword), the Bitwidth is
 351          * the same (equivalent) as the byte_alignment.
 352          */
 353         access_bit_width = acpi_ex_decode_field_access(obj_desc, field_flags,
 354                                                        &byte_alignment);
 355         if (!access_bit_width) {
 356                 return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
 357         }
 358
 359         /* Setup width (access granularity) fields (values are: 1, 2, 4, 8) */
 360
 361         obj_desc->common_field.access_byte_width = (u8)
 362             ACPI_DIV_8(access_bit_width);
 363
 364         /*
 365          * base_byte_offset is the address of the start of the field within the
 366          * region.  It is the byte address of the first *datum* (field-width data
 367          * unit) of the field. (i.e., the first datum that contains at least the
 368          * first *bit* of the field.)
 369          *
 370          * Note: byte_alignment is always either equal to the access_bit_width or 8
 371          * (Byte access), and it defines the addressing granularity of the parent
 372          * region or buffer.
 373          */
 374         nearest_byte_address =
 375             ACPI_ROUND_BITS_DOWN_TO_BYTES(field_bit_position);
 376         obj_desc->common_field.base_byte_offset = (u32)
 377             ACPI_ROUND_DOWN(nearest_byte_address, byte_alignment);
 378
 379         /*
 380          * start_field_bit_offset is the offset of the first bit of the field within
 381          * a field datum.
 382          */
 383         obj_desc->common_field.start_field_bit_offset = (u8)
 384             (field_bit_position -
 385              ACPI_MUL_8(obj_desc->common_field.base_byte_offset));
 386
 387         return_ACPI_STATUS(AE_OK);
 388 }
 389
 390 /*******************************************************************************
 391  *
 392  * FUNCTION:    acpi_ex_prep_field_value
 393  *
 394  * PARAMETERS:  Info    - Contains all field creation info
 395  *
 396  * RETURN:      Status
 397  *
 398  * DESCRIPTION: Construct a union acpi_operand_object of type def_field and
 399  *              connect it to the parent Node.
 400  *
 401  ******************************************************************************/
 402
 403 acpi_status acpi_ex_prep_field_value(struct acpi_create_field_info *info)
 404 {
 405         union acpi_operand_object *obj_desc;
 406         union acpi_operand_object *second_desc = NULL;
 407         acpi_status status;
 408         u32 access_byte_width;
 409         u32 type;
 410
 411         ACPI_FUNCTION_TRACE(ex_prep_field_value);
 412
 413         /* Parameter validation */
 414
 415         if (info->field_type != ACPI_TYPE_LOCAL_INDEX_FIELD) {
 416                 if (!info->region_node) {
 417                         ACPI_ERROR((AE_INFO, "Null RegionNode"));
 418                         return_ACPI_STATUS(AE_AML_NO_OPERAND);
 419                 }
 420
 421                 type = acpi_ns_get_type(info->region_node);
 422                 if (type != ACPI_TYPE_REGION) {
 423                         ACPI_ERROR((AE_INFO,
 424                                     "Needed Region, found type 0x%X (%s)", type,
 425                                     acpi_ut_get_type_name(type)));
 426
 427                         return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 428                 }
 429         }
 430
 431         /* Allocate a new field object */
 432
 433         obj_desc = acpi_ut_create_internal_object(info->field_type);
 434         if (!obj_desc) {
 435                 return_ACPI_STATUS(AE_NO_MEMORY);
 436         }
 437
 438         /* Initialize areas of the object that are common to all fields */
 439
 440         obj_desc->common_field.node = info->field_node;
 441         status = acpi_ex_prep_common_field_object(obj_desc,
 442                                                   info->field_flags,
 443                                                   info->attribute,
 444                                                   info->field_bit_position,
 445                                                   info->field_bit_length);
 446         if (ACPI_FAILURE(status)) {
 447                 acpi_ut_delete_object_desc(obj_desc);
 448                 return_ACPI_STATUS(status);
 449         }
 450
 451         /* Initialize areas of the object that are specific to the field type */
 452
 453         switch (info->field_type) {
 454         case ACPI_TYPE_LOCAL_REGION_FIELD:
 455
 456                 obj_desc->field.region_obj =
 457                     acpi_ns_get_attached_object(info->region_node);
 458
 459                 /* Fields specific to generic_serial_bus fields */
 460
 461                 obj_desc->field.access_length = info->access_length;
 462
 463                 if (info->connection_node) {
 464                         second_desc = info->connection_node->object;
 465                         if (!(second_desc->common.flags & AOPOBJ_DATA_VALID)) {
 466                                 status =
 467                                     acpi_ds_get_buffer_arguments(second_desc);
 468                                 if (ACPI_FAILURE(status)) {
 469                                         acpi_ut_delete_object_desc(obj_desc);
 470                                         return_ACPI_STATUS(status);
 471                                 }
 472                         }
 473
 474                         obj_desc->field.resource_buffer =
 475                             second_desc->buffer.pointer;
 476                         obj_desc->field.resource_length =
 477                             (u16)second_desc->buffer.length;
 478                 } else if (info->resource_buffer) {
 479                         obj_desc->field.resource_buffer = info->resource_buffer;
 480                         obj_desc->field.resource_length = info->resource_length;
 481                 }
 482
 483                 /* Allow full data read from EC address space */
 484
 485                 if ((obj_desc->field.region_obj->region.space_id ==
 486                      ACPI_ADR_SPACE_EC)
 487                     && (obj_desc->common_field.bit_length > 8)) {
 488                         access_byte_width =
 489                             ACPI_ROUND_BITS_UP_TO_BYTES(obj_desc->common_field.
 490                                                         bit_length);
 491
 492                         /* Maximum byte width supported is 255 */
 493
 494                         if (access_byte_width < 256) {
 495                                 obj_desc->common_field.access_byte_width =
 496                                     (u8)access_byte_width;
 497                         }
 498                 }
 499                 /* An additional reference for the container */
 500
 501                 acpi_ut_add_reference(obj_desc->field.region_obj);
 502
 503                 ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
 504                                   "RegionField: BitOff %X, Off %X, Gran %X, Region %p\n",
 505                                   obj_desc->field.start_field_bit_offset,
 506                                   obj_desc->field.base_byte_offset,
 507                                   obj_desc->field.access_byte_width,
 508                                   obj_desc->field.region_obj));
 509                 break;
 510
 511         case ACPI_TYPE_LOCAL_BANK_FIELD:
 512
 513                 obj_desc->bank_field.value = info->bank_value;
 514                 obj_desc->bank_field.region_obj =
 515                     acpi_ns_get_attached_object(info->region_node);
 516                 obj_desc->bank_field.bank_obj =
 517                     acpi_ns_get_attached_object(info->register_node);
 518
 519                 /* An additional reference for the attached objects */
 520
 521                 acpi_ut_add_reference(obj_desc->bank_field.region_obj);
 522                 acpi_ut_add_reference(obj_desc->bank_field.bank_obj);
 523
 524                 ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
 525                                   "Bank Field: BitOff %X, Off %X, Gran %X, Region %p, BankReg %p\n",
 526                                   obj_desc->bank_field.start_field_bit_offset,
 527                                   obj_desc->bank_field.base_byte_offset,
 528                                   obj_desc->field.access_byte_width,
 529                                   obj_desc->bank_field.region_obj,
 530                                   obj_desc->bank_field.bank_obj));
 531
 532                 /*
 533                  * Remember location in AML stream of the field unit
 534                  * opcode and operands -- since the bank_value
 535                  * operands must be evaluated.
 536                  */
 537                 second_desc = obj_desc->common.next_object;
 538                 second_desc->extra.aml_start =
 539                     ACPI_CAST_PTR(union acpi_parse_object,
 540                                   info->data_register_node)->named.data;
 541                 second_desc->extra.aml_length =
 542                     ACPI_CAST_PTR(union acpi_parse_object,
 543                                   info->data_register_node)->named.length;
 544
 545                 break;
 546
 547         case ACPI_TYPE_LOCAL_INDEX_FIELD:
 548
 549                 /* Get the Index and Data registers */
 550
 551                 obj_desc->index_field.index_obj =
 552                     acpi_ns_get_attached_object(info->register_node);
 553                 obj_desc->index_field.data_obj =
 554                     acpi_ns_get_attached_object(info->data_register_node);
 555
 556                 if (!obj_desc->index_field.data_obj
 557                     || !obj_desc->index_field.index_obj) {
 558                         ACPI_ERROR((AE_INFO,
 559                                     "Null Index Object during field prep"));
 560                         acpi_ut_delete_object_desc(obj_desc);
 561                         return_ACPI_STATUS(AE_AML_INTERNAL);
 562                 }
 563
 564                 /* An additional reference for the attached objects */
 565
 566                 acpi_ut_add_reference(obj_desc->index_field.data_obj);
 567                 acpi_ut_add_reference(obj_desc->index_field.index_obj);
 568
 569                 /*
 570                  * April 2006: Changed to match MS behavior
 571                  *
 572                  * The value written to the Index register is the byte offset of the
 573                  * target field in units of the granularity of the index_field
 574                  *
 575                  * Previously, the value was calculated as an index in terms of the
 576                  * width of the Data register, as below:
 577                  *
 578                  *      obj_desc->index_field.Value = (u32)
 579                  *          (Info->field_bit_position / ACPI_MUL_8 (
 580                  *              obj_desc->Field.access_byte_width));
 581                  *
 582                  * February 2006: Tried value as a byte offset:
 583                  *      obj_desc->index_field.Value = (u32)
 584                  *          ACPI_DIV_8 (Info->field_bit_position);
 585                  */
 586                 obj_desc->index_field.value =
 587                     (u32) ACPI_ROUND_DOWN(ACPI_DIV_8(info->field_bit_position),
 588                                           obj_desc->index_field.
 589                                           access_byte_width);
 590
 591                 ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
 592                                   "IndexField: BitOff %X, Off %X, Value %X, Gran %X, Index %p, Data %p\n",
 593                                   obj_desc->index_field.start_field_bit_offset,
 594                                   obj_desc->index_field.base_byte_offset,
 595                                   obj_desc->index_field.value,
 596                                   obj_desc->field.access_byte_width,
 597                                   obj_desc->index_field.index_obj,
 598                                   obj_desc->index_field.data_obj));
 599                 break;
 600
 601         default:
 602                 /* No other types should get here */
 603                 break;
 604         }
 605
 606         /*
 607          * Store the constructed descriptor (obj_desc) into the parent Node,
 608          * preserving the current type of that named_obj.
 609          */
 610         status = acpi_ns_attach_object(info->field_node, obj_desc,
 611                                        acpi_ns_get_type(info->field_node));
 612
 613         ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
 614                           "Set NamedObj %p [%4.4s], ObjDesc %p\n",
 615                           info->field_node,
 616                           acpi_ut_get_node_name(info->field_node), obj_desc));
 617
 618         /* Remove local reference to the object */
 619
 620         acpi_ut_remove_reference(obj_desc);
 621         return_ACPI_STATUS(status);
 622 }