git.oblomov.eu Git - linux-2.6/blob - drivers/acpi/executer/exconvrt.c

   1 /******************************************************************************
   2  *
   3  * Module Name: exconvrt - Object conversion routines
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2005, 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
  45 #include <acpi/acpi.h>
  46 #include <acpi/acinterp.h>
  47 #include <acpi/amlcode.h>
  48
  49
  50 #define _COMPONENT          ACPI_EXECUTER
  51          ACPI_MODULE_NAME    ("exconvrt")
  52
  53 /* Local prototypes */
  54
  55 static u32
  56 acpi_ex_convert_to_ascii (
  57         acpi_integer                    integer,
  58         u16                             base,
  59         u8                              *string,
  60         u8                              max_length);
  61
  62
  63 /*******************************************************************************
  64  *
  65  * FUNCTION:    acpi_ex_convert_to_integer
  66  *
  67  * PARAMETERS:  obj_desc        - Object to be converted.  Must be an
  68  *                                Integer, Buffer, or String
  69  *              result_desc     - Where the new Integer object is returned
  70  *              Flags           - Used for string conversion
  71  *
  72  * RETURN:      Status
  73  *
  74  * DESCRIPTION: Convert an ACPI Object to an integer.
  75  *
  76  ******************************************************************************/
  77
  78 acpi_status
  79 acpi_ex_convert_to_integer (
  80         union acpi_operand_object       *obj_desc,
  81         union acpi_operand_object       **result_desc,
  82         u32                             flags)
  83 {
  84         union acpi_operand_object       *return_desc;
  85         u8                              *pointer;
  86         acpi_integer                    result;
  87         u32                             i;
  88         u32                             count;
  89         acpi_status                     status;
  90
  91
  92         ACPI_FUNCTION_TRACE_PTR ("ex_convert_to_integer", obj_desc);
  93
  94
  95         switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
  96         case ACPI_TYPE_INTEGER:
  97
  98                 /* No conversion necessary */
  99
 100                 *result_desc = obj_desc;
 101                 return_ACPI_STATUS (AE_OK);
 102
 103         case ACPI_TYPE_BUFFER:
 104         case ACPI_TYPE_STRING:
 105
 106                 /* Note: Takes advantage of common buffer/string fields */
 107
 108                 pointer = obj_desc->buffer.pointer;
 109                 count   = obj_desc->buffer.length;
 110                 break;
 111
 112         default:
 113                 return_ACPI_STATUS (AE_TYPE);
 114         }
 115
 116         /*
 117          * Convert the buffer/string to an integer.  Note that both buffers and
 118          * strings are treated as raw data - we don't convert ascii to hex for
 119          * strings.
 120          *
 121          * There are two terminating conditions for the loop:
 122          * 1) The size of an integer has been reached, or
 123          * 2) The end of the buffer or string has been reached
 124          */
 125         result = 0;
 126
 127         /* String conversion is different than Buffer conversion */
 128
 129         switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
 130         case ACPI_TYPE_STRING:
 131
 132                 /*
 133                  * Convert string to an integer - for most cases, the string must be
 134                  * hexadecimal as per the ACPI specification.  The only exception (as
 135                  * of ACPI 3.0) is that the to_integer() operator allows both decimal
 136                  * and hexadecimal strings (hex prefixed with "0x").
 137                  */
 138                 status = acpi_ut_strtoul64 ((char *) pointer, flags, &result);
 139                 if (ACPI_FAILURE (status)) {
 140                         return_ACPI_STATUS (status);
 141                 }
 142                 break;
 143
 144
 145         case ACPI_TYPE_BUFFER:
 146
 147                 /* Check for zero-length buffer */
 148
 149                 if (!count) {
 150                         return_ACPI_STATUS (AE_AML_BUFFER_LIMIT);
 151                 }
 152
 153                 /* Transfer no more than an integer's worth of data */
 154
 155                 if (count > acpi_gbl_integer_byte_width) {
 156                         count = acpi_gbl_integer_byte_width;
 157                 }
 158
 159                 /*
 160                  * Convert buffer to an integer - we simply grab enough raw data
 161                  * from the buffer to fill an integer
 162                  */
 163                 for (i = 0; i < count; i++) {
 164                         /*
 165                          * Get next byte and shift it into the Result.
 166                          * Little endian is used, meaning that the first byte of the buffer
 167                          * is the LSB of the integer
 168                          */
 169                         result |= (((acpi_integer) pointer[i]) << (i * 8));
 170                 }
 171                 break;
 172
 173
 174         default:
 175                 /* No other types can get here */
 176                 break;
 177         }
 178
 179         /* Create a new integer */
 180
 181         return_desc = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER);
 182         if (!return_desc) {
 183                 return_ACPI_STATUS (AE_NO_MEMORY);
 184         }
 185
 186         /* Save the Result */
 187
 188         return_desc->integer.value = result;
 189         acpi_ex_truncate_for32bit_table (return_desc);
 190         *result_desc = return_desc;
 191         return_ACPI_STATUS (AE_OK);
 192 }
 193
 194
 195 /*******************************************************************************
 196  *
 197  * FUNCTION:    acpi_ex_convert_to_buffer
 198  *
 199  * PARAMETERS:  obj_desc        - Object to be converted.  Must be an
 200  *                                Integer, Buffer, or String
 201  *              result_desc     - Where the new buffer object is returned
 202  *
 203  * RETURN:      Status
 204  *
 205  * DESCRIPTION: Convert an ACPI Object to a Buffer
 206  *
 207  ******************************************************************************/
 208
 209 acpi_status
 210 acpi_ex_convert_to_buffer (
 211         union acpi_operand_object       *obj_desc,
 212         union acpi_operand_object       **result_desc)
 213 {
 214         union acpi_operand_object       *return_desc;
 215         u8                              *new_buf;
 216
 217
 218         ACPI_FUNCTION_TRACE_PTR ("ex_convert_to_buffer", obj_desc);
 219
 220
 221         switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
 222         case ACPI_TYPE_BUFFER:
 223
 224                 /* No conversion necessary */
 225
 226                 *result_desc = obj_desc;
 227                 return_ACPI_STATUS (AE_OK);
 228
 229
 230         case ACPI_TYPE_INTEGER:
 231
 232                 /*
 233                  * Create a new Buffer object.
 234                  * Need enough space for one integer
 235                  */
 236                 return_desc = acpi_ut_create_buffer_object (acpi_gbl_integer_byte_width);
 237                 if (!return_desc) {
 238                         return_ACPI_STATUS (AE_NO_MEMORY);
 239                 }
 240
 241                 /* Copy the integer to the buffer, LSB first */
 242
 243                 new_buf = return_desc->buffer.pointer;
 244                 ACPI_MEMCPY (new_buf,
 245                                   &obj_desc->integer.value,
 246                                   acpi_gbl_integer_byte_width);
 247                 break;
 248
 249
 250         case ACPI_TYPE_STRING:
 251
 252                 /*
 253                  * Create a new Buffer object
 254                  * Size will be the string length
 255                  *
 256                  * NOTE: Add one to the string length to include the null terminator.
 257                  * The ACPI spec is unclear on this subject, but there is existing
 258                  * ASL/AML code that depends on the null being transferred to the new
 259                  * buffer.
 260                  */
 261                 return_desc = acpi_ut_create_buffer_object (
 262                                   (acpi_size) obj_desc->string.length + 1);
 263                 if (!return_desc) {
 264                         return_ACPI_STATUS (AE_NO_MEMORY);
 265                 }
 266
 267                 /* Copy the string to the buffer */
 268
 269                 new_buf = return_desc->buffer.pointer;
 270                 ACPI_STRNCPY ((char *) new_buf, (char *) obj_desc->string.pointer,
 271                         obj_desc->string.length);
 272                 break;
 273
 274
 275         default:
 276                 return_ACPI_STATUS (AE_TYPE);
 277         }
 278
 279         /* Mark buffer initialized */
 280
 281         return_desc->common.flags |= AOPOBJ_DATA_VALID;
 282         *result_desc = return_desc;
 283         return_ACPI_STATUS (AE_OK);
 284 }
 285
 286
 287 /*******************************************************************************
 288  *
 289  * FUNCTION:    acpi_ex_convert_to_ascii
 290  *
 291  * PARAMETERS:  Integer         - Value to be converted
 292  *              Base            - ACPI_STRING_DECIMAL or ACPI_STRING_HEX
 293  *              String          - Where the string is returned
 294  *              data_width      - Size of data item to be converted, in bytes
 295  *
 296  * RETURN:      Actual string length
 297  *
 298  * DESCRIPTION: Convert an ACPI Integer to a hex or decimal string
 299  *
 300  ******************************************************************************/
 301
 302 static u32
 303 acpi_ex_convert_to_ascii (
 304         acpi_integer                    integer,
 305         u16                             base,
 306         u8                              *string,
 307         u8                              data_width)
 308 {
 309         acpi_integer                    digit;
 310         acpi_native_uint                i;
 311         acpi_native_uint                j;
 312         acpi_native_uint                k = 0;
 313         acpi_native_uint                hex_length;
 314         acpi_native_uint                decimal_length;
 315         u32                             remainder;
 316         u8                              supress_zeros;
 317
 318
 319         ACPI_FUNCTION_ENTRY ();
 320
 321
 322         switch (base) {
 323         case 10:
 324
 325                 /* Setup max length for the decimal number */
 326
 327                 switch (data_width) {
 328                 case 1:
 329                         decimal_length = ACPI_MAX8_DECIMAL_DIGITS;
 330                         break;
 331
 332                 case 4:
 333                         decimal_length = ACPI_MAX32_DECIMAL_DIGITS;
 334                         break;
 335
 336                 case 8:
 337                 default:
 338                         decimal_length = ACPI_MAX64_DECIMAL_DIGITS;
 339                         break;
 340                 }
 341
 342                 supress_zeros = TRUE;    /* No leading zeros */
 343                 remainder = 0;
 344
 345                 for (i = decimal_length; i > 0; i--) {
 346                         /* Divide by nth factor of 10 */
 347
 348                         digit = integer;
 349                         for (j = 0; j < i; j++) {
 350                                 (void) acpi_ut_short_divide (digit, 10, &digit, &remainder);
 351                         }
 352
 353                         /* Handle leading zeros */
 354
 355                         if (remainder != 0) {
 356                                 supress_zeros = FALSE;
 357                         }
 358
 359                         if (!supress_zeros) {
 360                                 string[k] = (u8) (ACPI_ASCII_ZERO + remainder);
 361                                 k++;
 362                         }
 363                 }
 364                 break;
 365
 366         case 16:
 367
 368                 /* hex_length: 2 ascii hex chars per data byte */
 369
 370                 hex_length = ACPI_MUL_2 (data_width);
 371                 for (i = 0, j = (hex_length-1); i < hex_length; i++, j--) {
 372                         /* Get one hex digit, most significant digits first */
 373
 374                         string[k] = (u8) acpi_ut_hex_to_ascii_char (integer, ACPI_MUL_4 (j));
 375                         k++;
 376                 }
 377                 break;
 378
 379         default:
 380                 return (0);
 381         }
 382
 383         /*
 384          * Since leading zeros are supressed, we must check for the case where
 385          * the integer equals 0
 386          *
 387          * Finally, null terminate the string and return the length
 388          */
 389         if (!k) {
 390                 string [0] = ACPI_ASCII_ZERO;
 391                 k = 1;
 392         }
 393
 394         string [k] = 0;
 395         return ((u32) k);
 396 }
 397
 398
 399 /*******************************************************************************
 400  *
 401  * FUNCTION:    acpi_ex_convert_to_string
 402  *
 403  * PARAMETERS:  obj_desc        - Object to be converted.  Must be an
 404  *                                Integer, Buffer, or String
 405  *              result_desc     - Where the string object is returned
 406  *              Type            - String flags (base and conversion type)
 407  *
 408  * RETURN:      Status
 409  *
 410  * DESCRIPTION: Convert an ACPI Object to a string
 411  *
 412  ******************************************************************************/
 413
 414 acpi_status
 415 acpi_ex_convert_to_string (
 416         union acpi_operand_object       *obj_desc,
 417         union acpi_operand_object       **result_desc,
 418         u32                             type)
 419 {
 420         union acpi_operand_object       *return_desc;
 421         u8                              *new_buf;
 422         u32                             i;
 423         u32                             string_length = 0;
 424         u16                             base = 16;
 425         u8                              separator = ',';
 426
 427
 428         ACPI_FUNCTION_TRACE_PTR ("ex_convert_to_string", obj_desc);
 429
 430
 431         switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
 432         case ACPI_TYPE_STRING:
 433
 434                 /* No conversion necessary */
 435
 436                 *result_desc = obj_desc;
 437                 return_ACPI_STATUS (AE_OK);
 438
 439
 440         case ACPI_TYPE_INTEGER:
 441
 442                 switch (type) {
 443                 case ACPI_EXPLICIT_CONVERT_DECIMAL:
 444
 445                         /* Make room for maximum decimal number */
 446
 447                         string_length = ACPI_MAX_DECIMAL_DIGITS;
 448                         base = 10;
 449                         break;
 450
 451                 default:
 452
 453                         /* Two hex string characters for each integer byte */
 454
 455                         string_length = ACPI_MUL_2 (acpi_gbl_integer_byte_width);
 456                         break;
 457                 }
 458
 459                 /*
 460                  * Create a new String
 461                  * Need enough space for one ASCII integer (plus null terminator)
 462                  */
 463                 return_desc = acpi_ut_create_string_object ((acpi_size) string_length);
 464                 if (!return_desc) {
 465                         return_ACPI_STATUS (AE_NO_MEMORY);
 466                 }
 467
 468                 new_buf = return_desc->buffer.pointer;
 469
 470                 /* Convert integer to string */
 471
 472                 string_length = acpi_ex_convert_to_ascii (obj_desc->integer.value, base,
 473                                    new_buf, acpi_gbl_integer_byte_width);
 474
 475                 /* Null terminate at the correct place */
 476
 477                 return_desc->string.length = string_length;
 478                 new_buf [string_length] = 0;
 479                 break;
 480
 481
 482         case ACPI_TYPE_BUFFER:
 483
 484                 /* Setup string length, base, and separator */
 485
 486                 switch (type) {
 487                 case ACPI_EXPLICIT_CONVERT_DECIMAL: /* Used by to_decimal_string */
 488                         /*
 489                          * From ACPI: "If Data is a buffer, it is converted to a string of
 490                          * decimal values separated by commas."
 491                          */
 492                         base = 10;
 493
 494                         /*
 495                          * Calculate the final string length.  Individual string values
 496                          * are variable length (include separator for each)
 497                          */
 498                         for (i = 0; i < obj_desc->buffer.length; i++) {
 499                                 if (obj_desc->buffer.pointer[i] >= 100) {
 500                                         string_length += 4;
 501                                 }
 502                                 else if (obj_desc->buffer.pointer[i] >= 10) {
 503                                         string_length += 3;
 504                                 }
 505                                 else {
 506                                         string_length += 2;
 507                                 }
 508                         }
 509                         break;
 510
 511                 case ACPI_IMPLICIT_CONVERT_HEX:
 512                         /*
 513                          * From the ACPI spec:
 514                          *"The entire contents of the buffer are converted to a string of
 515                          * two-character hexadecimal numbers, each separated by a space."
 516                          */
 517                         separator = ' ';
 518                         string_length = (obj_desc->buffer.length * 3);
 519                         break;
 520
 521                 case ACPI_EXPLICIT_CONVERT_HEX:     /* Used by to_hex_string */
 522                         /*
 523                          * From ACPI: "If Data is a buffer, it is converted to a string of
 524                          * hexadecimal values separated by commas."
 525                          */
 526                         string_length = (obj_desc->buffer.length * 3);
 527                         break;
 528
 529                 default:
 530                         return_ACPI_STATUS (AE_BAD_PARAMETER);
 531                 }
 532
 533                 /*
 534                  * Perform the conversion.
 535                  * (-1 because of extra separator included in string_length from above)
 536                  */
 537                 string_length--;
 538                 if (string_length > ACPI_MAX_STRING_CONVERSION) /* ACPI limit */ {
 539                         return_ACPI_STATUS (AE_AML_STRING_LIMIT);
 540                 }
 541
 542                 /* Create a new string object and string buffer */
 543
 544                 return_desc = acpi_ut_create_string_object ((acpi_size) string_length);
 545                 if (!return_desc) {
 546                         return_ACPI_STATUS (AE_NO_MEMORY);
 547                 }
 548
 549                 new_buf = return_desc->buffer.pointer;
 550
 551                 /*
 552                  * Convert buffer bytes to hex or decimal values
 553                  * (separated by commas or spaces)
 554                  */
 555                 for (i = 0; i < obj_desc->buffer.length; i++) {
 556                         new_buf += acpi_ex_convert_to_ascii (
 557                                          (acpi_integer) obj_desc->buffer.pointer[i], base,
 558                                          new_buf, 1);
 559                         *new_buf++ = separator; /* each separated by a comma or space */
 560                 }
 561
 562                 /*
 563                  * Null terminate the string
 564                  * (overwrites final comma/space from above)
 565                  */
 566                 new_buf--;
 567                 *new_buf = 0;
 568                 break;
 569
 570         default:
 571                 return_ACPI_STATUS (AE_TYPE);
 572         }
 573
 574         *result_desc = return_desc;
 575         return_ACPI_STATUS (AE_OK);
 576 }
 577
 578
 579 /*******************************************************************************
 580  *
 581  * FUNCTION:    acpi_ex_convert_to_target_type
 582  *
 583  * PARAMETERS:  destination_type    - Current type of the destination
 584  *              source_desc         - Source object to be converted.
 585  *              result_desc         - Where the converted object is returned
 586  *              walk_state          - Current method state
 587  *
 588  * RETURN:      Status
 589  *
 590  * DESCRIPTION: Implements "implicit conversion" rules for storing an object.
 591  *
 592  ******************************************************************************/
 593
 594 acpi_status
 595 acpi_ex_convert_to_target_type (
 596         acpi_object_type                destination_type,
 597         union acpi_operand_object       *source_desc,
 598         union acpi_operand_object       **result_desc,
 599         struct acpi_walk_state          *walk_state)
 600 {
 601         acpi_status                     status = AE_OK;
 602
 603
 604         ACPI_FUNCTION_TRACE ("ex_convert_to_target_type");
 605
 606
 607         /* Default behavior */
 608
 609         *result_desc = source_desc;
 610
 611         /*
 612          * If required by the target,
 613          * perform implicit conversion on the source before we store it.
 614          */
 615         switch (GET_CURRENT_ARG_TYPE (walk_state->op_info->runtime_args)) {
 616         case ARGI_SIMPLE_TARGET:
 617         case ARGI_FIXED_TARGET:
 618         case ARGI_INTEGER_REF:      /* Handles Increment, Decrement cases */
 619
 620                 switch (destination_type) {
 621                 case ACPI_TYPE_LOCAL_REGION_FIELD:
 622                         /*
 623                          * Named field can always handle conversions
 624                          */
 625                         break;
 626
 627                 default:
 628                         /* No conversion allowed for these types */
 629
 630                         if (destination_type != ACPI_GET_OBJECT_TYPE (source_desc)) {
 631                                 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
 632                                         "Explicit operator, will store (%s) over existing type (%s)\n",
 633                                         acpi_ut_get_object_type_name (source_desc),
 634                                         acpi_ut_get_type_name (destination_type)));
 635                                 status = AE_TYPE;
 636                         }
 637                 }
 638                 break;
 639
 640
 641         case ARGI_TARGETREF:
 642
 643                 switch (destination_type) {
 644                 case ACPI_TYPE_INTEGER:
 645                 case ACPI_TYPE_BUFFER_FIELD:
 646                 case ACPI_TYPE_LOCAL_BANK_FIELD:
 647                 case ACPI_TYPE_LOCAL_INDEX_FIELD:
 648                         /*
 649                          * These types require an Integer operand.  We can convert
 650                          * a Buffer or a String to an Integer if necessary.
 651                          */
 652                         status = acpi_ex_convert_to_integer (source_desc, result_desc,
 653                                          16);
 654                         break;
 655
 656
 657                 case ACPI_TYPE_STRING:
 658                         /*
 659                          * The operand must be a String.  We can convert an
 660                          * Integer or Buffer if necessary
 661                          */
 662                         status = acpi_ex_convert_to_string (source_desc, result_desc,
 663                                          ACPI_IMPLICIT_CONVERT_HEX);
 664                         break;
 665
 666
 667                 case ACPI_TYPE_BUFFER:
 668                         /*
 669                          * The operand must be a Buffer.  We can convert an
 670                          * Integer or String if necessary
 671                          */
 672                         status = acpi_ex_convert_to_buffer (source_desc, result_desc);
 673                         break;
 674
 675
 676                 default:
 677                         ACPI_REPORT_ERROR (("Bad destination type during conversion: %X\n",
 678                                 destination_type));
 679                         status = AE_AML_INTERNAL;
 680                         break;
 681                 }
 682                 break;
 683
 684
 685         case ARGI_REFERENCE:
 686                 /*
 687                  * create_xxxx_field cases - we are storing the field object into the name
 688                  */
 689                 break;
 690
 691
 692         default:
 693                 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
 694                         "Unknown Target type ID 0x%X Op %s dest_type %s\n",
 695                         GET_CURRENT_ARG_TYPE (walk_state->op_info->runtime_args),
 696                         walk_state->op_info->name, acpi_ut_get_type_name (destination_type)));
 697
 698                 ACPI_REPORT_ERROR (("Bad Target Type (ARGI): %X\n",
 699                         GET_CURRENT_ARG_TYPE (walk_state->op_info->runtime_args)))
 700                 status = AE_AML_INTERNAL;
 701         }
 702
 703         /*
 704          * Source-to-Target conversion semantics:
 705          *
 706          * If conversion to the target type cannot be performed, then simply
 707          * overwrite the target with the new object and type.
 708          */
 709         if (status == AE_TYPE) {
 710                 status = AE_OK;
 711         }
 712
 713         return_ACPI_STATUS (status);
 714 }
 715
 716