git.oblomov.eu Git - linux-2.6/blob - drivers/acpi/utilities/utmisc.c

   1 /*******************************************************************************
   2  *
   3  * Module Name: utmisc - common utility procedures
   4  *
   5  ******************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2008, 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 <linux/module.h>
  45
  46 #include <acpi/acpi.h>
  47 #include <acpi/acnamesp.h>
  48
  49 #define _COMPONENT          ACPI_UTILITIES
  50 ACPI_MODULE_NAME("utmisc")
  51
  52 /*******************************************************************************
  53  *
  54  * FUNCTION:    acpi_ut_validate_exception
  55  *
  56  * PARAMETERS:  Status       - The acpi_status code to be formatted
  57  *
  58  * RETURN:      A string containing the exception text. NULL if exception is
  59  *              not valid.
  60  *
  61  * DESCRIPTION: This function validates and translates an ACPI exception into
  62  *              an ASCII string.
  63  *
  64  ******************************************************************************/
  65 const char *acpi_ut_validate_exception(acpi_status status)
  66 {
  67         u32 sub_status;
  68         const char *exception = NULL;
  69
  70         ACPI_FUNCTION_ENTRY();
  71
  72         /*
  73          * Status is composed of two parts, a "type" and an actual code
  74          */
  75         sub_status = (status & ~AE_CODE_MASK);
  76
  77         switch (status & AE_CODE_MASK) {
  78         case AE_CODE_ENVIRONMENTAL:
  79
  80                 if (sub_status <= AE_CODE_ENV_MAX) {
  81                         exception = acpi_gbl_exception_names_env[sub_status];
  82                 }
  83                 break;
  84
  85         case AE_CODE_PROGRAMMER:
  86
  87                 if (sub_status <= AE_CODE_PGM_MAX) {
  88                         exception = acpi_gbl_exception_names_pgm[sub_status];
  89                 }
  90                 break;
  91
  92         case AE_CODE_ACPI_TABLES:
  93
  94                 if (sub_status <= AE_CODE_TBL_MAX) {
  95                         exception = acpi_gbl_exception_names_tbl[sub_status];
  96                 }
  97                 break;
  98
  99         case AE_CODE_AML:
 100
 101                 if (sub_status <= AE_CODE_AML_MAX) {
 102                         exception = acpi_gbl_exception_names_aml[sub_status];
 103                 }
 104                 break;
 105
 106         case AE_CODE_CONTROL:
 107
 108                 if (sub_status <= AE_CODE_CTRL_MAX) {
 109                         exception = acpi_gbl_exception_names_ctrl[sub_status];
 110                 }
 111                 break;
 112
 113         default:
 114                 break;
 115         }
 116
 117         return (ACPI_CAST_PTR(const char, exception));
 118 }
 119
 120 /*******************************************************************************
 121  *
 122  * FUNCTION:    acpi_ut_is_aml_table
 123  *
 124  * PARAMETERS:  Table               - An ACPI table
 125  *
 126  * RETURN:      TRUE if table contains executable AML; FALSE otherwise
 127  *
 128  * DESCRIPTION: Check ACPI Signature for a table that contains AML code.
 129  *              Currently, these are DSDT,SSDT,PSDT. All other table types are
 130  *              data tables that do not contain AML code.
 131  *
 132  ******************************************************************************/
 133
 134 u8 acpi_ut_is_aml_table(struct acpi_table_header *table)
 135 {
 136
 137         /* These are the only tables that contain executable AML */
 138
 139         if (ACPI_COMPARE_NAME(table->signature, ACPI_SIG_DSDT) ||
 140             ACPI_COMPARE_NAME(table->signature, ACPI_SIG_PSDT) ||
 141             ACPI_COMPARE_NAME(table->signature, ACPI_SIG_SSDT)) {
 142                 return (TRUE);
 143         }
 144
 145         return (FALSE);
 146 }
 147
 148 /*******************************************************************************
 149  *
 150  * FUNCTION:    acpi_ut_allocate_owner_id
 151  *
 152  * PARAMETERS:  owner_id        - Where the new owner ID is returned
 153  *
 154  * RETURN:      Status
 155  *
 156  * DESCRIPTION: Allocate a table or method owner ID. The owner ID is used to
 157  *              track objects created by the table or method, to be deleted
 158  *              when the method exits or the table is unloaded.
 159  *
 160  ******************************************************************************/
 161
 162 acpi_status acpi_ut_allocate_owner_id(acpi_owner_id * owner_id)
 163 {
 164         u32 i;
 165         u32 j;
 166         u32 k;
 167         acpi_status status;
 168
 169         ACPI_FUNCTION_TRACE(ut_allocate_owner_id);
 170
 171         /* Guard against multiple allocations of ID to the same location */
 172
 173         if (*owner_id) {
 174                 ACPI_ERROR((AE_INFO, "Owner ID [%2.2X] already exists",
 175                             *owner_id));
 176                 return_ACPI_STATUS(AE_ALREADY_EXISTS);
 177         }
 178
 179         /* Mutex for the global ID mask */
 180
 181         status = acpi_ut_acquire_mutex(ACPI_MTX_CACHES);
 182         if (ACPI_FAILURE(status)) {
 183                 return_ACPI_STATUS(status);
 184         }
 185
 186         /*
 187          * Find a free owner ID, cycle through all possible IDs on repeated
 188          * allocations. (ACPI_NUM_OWNERID_MASKS + 1) because first index may have
 189          * to be scanned twice.
 190          */
 191         for (i = 0, j = acpi_gbl_last_owner_id_index;
 192              i < (ACPI_NUM_OWNERID_MASKS + 1); i++, j++) {
 193                 if (j >= ACPI_NUM_OWNERID_MASKS) {
 194                         j = 0;  /* Wraparound to start of mask array */
 195                 }
 196
 197                 for (k = acpi_gbl_next_owner_id_offset; k < 32; k++) {
 198                         if (acpi_gbl_owner_id_mask[j] == ACPI_UINT32_MAX) {
 199
 200                                 /* There are no free IDs in this mask */
 201
 202                                 break;
 203                         }
 204
 205                         if (!(acpi_gbl_owner_id_mask[j] & (1 << k))) {
 206                                 /*
 207                                  * Found a free ID. The actual ID is the bit index plus one,
 208                                  * making zero an invalid Owner ID. Save this as the last ID
 209                                  * allocated and update the global ID mask.
 210                                  */
 211                                 acpi_gbl_owner_id_mask[j] |= (1 << k);
 212
 213                                 acpi_gbl_last_owner_id_index = (u8) j;
 214                                 acpi_gbl_next_owner_id_offset = (u8) (k + 1);
 215
 216                                 /*
 217                                  * Construct encoded ID from the index and bit position
 218                                  *
 219                                  * Note: Last [j].k (bit 255) is never used and is marked
 220                                  * permanently allocated (prevents +1 overflow)
 221                                  */
 222                                 *owner_id =
 223                                     (acpi_owner_id) ((k + 1) + ACPI_MUL_32(j));
 224
 225                                 ACPI_DEBUG_PRINT((ACPI_DB_VALUES,
 226                                                   "Allocated OwnerId: %2.2X\n",
 227                                                   (unsigned int)*owner_id));
 228                                 goto exit;
 229                         }
 230                 }
 231
 232                 acpi_gbl_next_owner_id_offset = 0;
 233         }
 234
 235         /*
 236          * All owner_ids have been allocated. This typically should
 237          * not happen since the IDs are reused after deallocation. The IDs are
 238          * allocated upon table load (one per table) and method execution, and
 239          * they are released when a table is unloaded or a method completes
 240          * execution.
 241          *
 242          * If this error happens, there may be very deep nesting of invoked control
 243          * methods, or there may be a bug where the IDs are not released.
 244          */
 245         status = AE_OWNER_ID_LIMIT;
 246         ACPI_ERROR((AE_INFO,
 247                     "Could not allocate new OwnerId (255 max), AE_OWNER_ID_LIMIT"));
 248
 249       exit:
 250         (void)acpi_ut_release_mutex(ACPI_MTX_CACHES);
 251         return_ACPI_STATUS(status);
 252 }
 253
 254 /*******************************************************************************
 255  *
 256  * FUNCTION:    acpi_ut_release_owner_id
 257  *
 258  * PARAMETERS:  owner_id_ptr        - Pointer to a previously allocated owner_iD
 259  *
 260  * RETURN:      None. No error is returned because we are either exiting a
 261  *              control method or unloading a table. Either way, we would
 262  *              ignore any error anyway.
 263  *
 264  * DESCRIPTION: Release a table or method owner ID.  Valid IDs are 1 - 255
 265  *
 266  ******************************************************************************/
 267
 268 void acpi_ut_release_owner_id(acpi_owner_id * owner_id_ptr)
 269 {
 270         acpi_owner_id owner_id = *owner_id_ptr;
 271         acpi_status status;
 272         u32 index;
 273         u32 bit;
 274
 275         ACPI_FUNCTION_TRACE_U32(ut_release_owner_id, owner_id);
 276
 277         /* Always clear the input owner_id (zero is an invalid ID) */
 278
 279         *owner_id_ptr = 0;
 280
 281         /* Zero is not a valid owner_iD */
 282
 283         if (owner_id == 0) {
 284                 ACPI_ERROR((AE_INFO, "Invalid OwnerId: %2.2X", owner_id));
 285                 return_VOID;
 286         }
 287
 288         /* Mutex for the global ID mask */
 289
 290         status = acpi_ut_acquire_mutex(ACPI_MTX_CACHES);
 291         if (ACPI_FAILURE(status)) {
 292                 return_VOID;
 293         }
 294
 295         /* Normalize the ID to zero */
 296
 297         owner_id--;
 298
 299         /* Decode ID to index/offset pair */
 300
 301         index = ACPI_DIV_32(owner_id);
 302         bit = 1 << ACPI_MOD_32(owner_id);
 303
 304         /* Free the owner ID only if it is valid */
 305
 306         if (acpi_gbl_owner_id_mask[index] & bit) {
 307                 acpi_gbl_owner_id_mask[index] ^= bit;
 308         } else {
 309                 ACPI_ERROR((AE_INFO,
 310                             "Release of non-allocated OwnerId: %2.2X",
 311                             owner_id + 1));
 312         }
 313
 314         (void)acpi_ut_release_mutex(ACPI_MTX_CACHES);
 315         return_VOID;
 316 }
 317
 318 /*******************************************************************************
 319  *
 320  * FUNCTION:    acpi_ut_strupr (strupr)
 321  *
 322  * PARAMETERS:  src_string      - The source string to convert
 323  *
 324  * RETURN:      None
 325  *
 326  * DESCRIPTION: Convert string to uppercase
 327  *
 328  * NOTE: This is not a POSIX function, so it appears here, not in utclib.c
 329  *
 330  ******************************************************************************/
 331
 332 void acpi_ut_strupr(char *src_string)
 333 {
 334         char *string;
 335
 336         ACPI_FUNCTION_ENTRY();
 337
 338         if (!src_string) {
 339                 return;
 340         }
 341
 342         /* Walk entire string, uppercasing the letters */
 343
 344         for (string = src_string; *string; string++) {
 345                 *string = (char)ACPI_TOUPPER(*string);
 346         }
 347
 348         return;
 349 }
 350
 351 /*******************************************************************************
 352  *
 353  * FUNCTION:    acpi_ut_print_string
 354  *
 355  * PARAMETERS:  String          - Null terminated ASCII string
 356  *              max_length      - Maximum output length
 357  *
 358  * RETURN:      None
 359  *
 360  * DESCRIPTION: Dump an ASCII string with support for ACPI-defined escape
 361  *              sequences.
 362  *
 363  ******************************************************************************/
 364
 365 void acpi_ut_print_string(char *string, u8 max_length)
 366 {
 367         u32 i;
 368
 369         if (!string) {
 370                 acpi_os_printf("<\"NULL STRING PTR\">");
 371                 return;
 372         }
 373
 374         acpi_os_printf("\"");
 375         for (i = 0; string[i] && (i < max_length); i++) {
 376
 377                 /* Escape sequences */
 378
 379                 switch (string[i]) {
 380                 case 0x07:
 381                         acpi_os_printf("\\a");  /* BELL */
 382                         break;
 383
 384                 case 0x08:
 385                         acpi_os_printf("\\b");  /* BACKSPACE */
 386                         break;
 387
 388                 case 0x0C:
 389                         acpi_os_printf("\\f");  /* FORMFEED */
 390                         break;
 391
 392                 case 0x0A:
 393                         acpi_os_printf("\\n");  /* LINEFEED */
 394                         break;
 395
 396                 case 0x0D:
 397                         acpi_os_printf("\\r");  /* CARRIAGE RETURN */
 398                         break;
 399
 400                 case 0x09:
 401                         acpi_os_printf("\\t");  /* HORIZONTAL TAB */
 402                         break;
 403
 404                 case 0x0B:
 405                         acpi_os_printf("\\v");  /* VERTICAL TAB */
 406                         break;
 407
 408                 case '\'':      /* Single Quote */
 409                 case '\"':      /* Double Quote */
 410                 case '\\':      /* Backslash */
 411                         acpi_os_printf("\\%c", (int)string[i]);
 412                         break;
 413
 414                 default:
 415
 416                         /* Check for printable character or hex escape */
 417
 418                         if (ACPI_IS_PRINT(string[i])) {
 419                                 /* This is a normal character */
 420
 421                                 acpi_os_printf("%c", (int)string[i]);
 422                         } else {
 423                                 /* All others will be Hex escapes */
 424
 425                                 acpi_os_printf("\\x%2.2X", (s32) string[i]);
 426                         }
 427                         break;
 428                 }
 429         }
 430         acpi_os_printf("\"");
 431
 432         if (i == max_length && string[i]) {
 433                 acpi_os_printf("...");
 434         }
 435 }
 436
 437 /*******************************************************************************
 438  *
 439  * FUNCTION:    acpi_ut_dword_byte_swap
 440  *
 441  * PARAMETERS:  Value           - Value to be converted
 442  *
 443  * RETURN:      u32 integer with bytes swapped
 444  *
 445  * DESCRIPTION: Convert a 32-bit value to big-endian (swap the bytes)
 446  *
 447  ******************************************************************************/
 448
 449 u32 acpi_ut_dword_byte_swap(u32 value)
 450 {
 451         union {
 452                 u32 value;
 453                 u8 bytes[4];
 454         } out;
 455         union {
 456                 u32 value;
 457                 u8 bytes[4];
 458         } in;
 459
 460         ACPI_FUNCTION_ENTRY();
 461
 462         in.value = value;
 463
 464         out.bytes[0] = in.bytes[3];
 465         out.bytes[1] = in.bytes[2];
 466         out.bytes[2] = in.bytes[1];
 467         out.bytes[3] = in.bytes[0];
 468
 469         return (out.value);
 470 }
 471
 472 /*******************************************************************************
 473  *
 474  * FUNCTION:    acpi_ut_set_integer_width
 475  *
 476  * PARAMETERS:  Revision            From DSDT header
 477  *
 478  * RETURN:      None
 479  *
 480  * DESCRIPTION: Set the global integer bit width based upon the revision
 481  *              of the DSDT.  For Revision 1 and 0, Integers are 32 bits.
 482  *              For Revision 2 and above, Integers are 64 bits.  Yes, this
 483  *              makes a difference.
 484  *
 485  ******************************************************************************/
 486
 487 void acpi_ut_set_integer_width(u8 revision)
 488 {
 489
 490         if (revision < 2) {
 491
 492                 /* 32-bit case */
 493
 494                 acpi_gbl_integer_bit_width = 32;
 495                 acpi_gbl_integer_nybble_width = 8;
 496                 acpi_gbl_integer_byte_width = 4;
 497         } else {
 498                 /* 64-bit case (ACPI 2.0+) */
 499
 500                 acpi_gbl_integer_bit_width = 64;
 501                 acpi_gbl_integer_nybble_width = 16;
 502                 acpi_gbl_integer_byte_width = 8;
 503         }
 504 }
 505
 506 #ifdef ACPI_DEBUG_OUTPUT
 507 /*******************************************************************************
 508  *
 509  * FUNCTION:    acpi_ut_display_init_pathname
 510  *
 511  * PARAMETERS:  Type                - Object type of the node
 512  *              obj_handle          - Handle whose pathname will be displayed
 513  *              Path                - Additional path string to be appended.
 514  *                                      (NULL if no extra path)
 515  *
 516  * RETURN:      acpi_status
 517  *
 518  * DESCRIPTION: Display full pathname of an object, DEBUG ONLY
 519  *
 520  ******************************************************************************/
 521
 522 void
 523 acpi_ut_display_init_pathname(u8 type,
 524                               struct acpi_namespace_node *obj_handle,
 525                               char *path)
 526 {
 527         acpi_status status;
 528         struct acpi_buffer buffer;
 529
 530         ACPI_FUNCTION_ENTRY();
 531
 532         /* Only print the path if the appropriate debug level is enabled */
 533
 534         if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) {
 535                 return;
 536         }
 537
 538         /* Get the full pathname to the node */
 539
 540         buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
 541         status = acpi_ns_handle_to_pathname(obj_handle, &buffer);
 542         if (ACPI_FAILURE(status)) {
 543                 return;
 544         }
 545
 546         /* Print what we're doing */
 547
 548         switch (type) {
 549         case ACPI_TYPE_METHOD:
 550                 acpi_os_printf("Executing  ");
 551                 break;
 552
 553         default:
 554                 acpi_os_printf("Initializing ");
 555                 break;
 556         }
 557
 558         /* Print the object type and pathname */
 559
 560         acpi_os_printf("%-12s %s",
 561                        acpi_ut_get_type_name(type), (char *)buffer.pointer);
 562
 563         /* Extra path is used to append names like _STA, _INI, etc. */
 564
 565         if (path) {
 566                 acpi_os_printf(".%s", path);
 567         }
 568         acpi_os_printf("\n");
 569
 570         ACPI_FREE(buffer.pointer);
 571 }
 572 #endif
 573
 574 /*******************************************************************************
 575  *
 576  * FUNCTION:    acpi_ut_valid_acpi_char
 577  *
 578  * PARAMETERS:  Char            - The character to be examined
 579  *              Position        - Byte position (0-3)
 580  *
 581  * RETURN:      TRUE if the character is valid, FALSE otherwise
 582  *
 583  * DESCRIPTION: Check for a valid ACPI character. Must be one of:
 584  *              1) Upper case alpha
 585  *              2) numeric
 586  *              3) underscore
 587  *
 588  *              We allow a '!' as the last character because of the ASF! table
 589  *
 590  ******************************************************************************/
 591
 592 u8 acpi_ut_valid_acpi_char(char character, u32 position)
 593 {
 594
 595         if (!((character >= 'A' && character <= 'Z') ||
 596               (character >= '0' && character <= '9') || (character == '_'))) {
 597
 598                 /* Allow a '!' in the last position */
 599
 600                 if (character == '!' && position == 3) {
 601                         return (TRUE);
 602                 }
 603
 604                 return (FALSE);
 605         }
 606
 607         return (TRUE);
 608 }
 609
 610 /*******************************************************************************
 611  *
 612  * FUNCTION:    acpi_ut_valid_acpi_name
 613  *
 614  * PARAMETERS:  Name            - The name to be examined
 615  *
 616  * RETURN:      TRUE if the name is valid, FALSE otherwise
 617  *
 618  * DESCRIPTION: Check for a valid ACPI name.  Each character must be one of:
 619  *              1) Upper case alpha
 620  *              2) numeric
 621  *              3) underscore
 622  *
 623  ******************************************************************************/
 624
 625 u8 acpi_ut_valid_acpi_name(u32 name)
 626 {
 627         u32 i;
 628
 629         ACPI_FUNCTION_ENTRY();
 630
 631         for (i = 0; i < ACPI_NAME_SIZE; i++) {
 632                 if (!acpi_ut_valid_acpi_char
 633                     ((ACPI_CAST_PTR(char, &name))[i], i)) {
 634                         return (FALSE);
 635                 }
 636         }
 637
 638         return (TRUE);
 639 }
 640
 641 /*******************************************************************************
 642  *
 643  * FUNCTION:    acpi_ut_repair_name
 644  *
 645  * PARAMETERS:  Name            - The ACPI name to be repaired
 646  *
 647  * RETURN:      Repaired version of the name
 648  *
 649  * DESCRIPTION: Repair an ACPI name: Change invalid characters to '*' and
 650  *              return the new name.
 651  *
 652  ******************************************************************************/
 653
 654 acpi_name acpi_ut_repair_name(char *name)
 655 {
 656        u32 i;
 657         char new_name[ACPI_NAME_SIZE];
 658
 659         for (i = 0; i < ACPI_NAME_SIZE; i++) {
 660                 new_name[i] = name[i];
 661
 662                 /*
 663                  * Replace a bad character with something printable, yet technically
 664                  * still invalid. This prevents any collisions with existing "good"
 665                  * names in the namespace.
 666                  */
 667                 if (!acpi_ut_valid_acpi_char(name[i], i)) {
 668                         new_name[i] = '*';
 669                 }
 670         }
 671
 672         return (*(u32 *) new_name);
 673 }
 674
 675 /*******************************************************************************
 676  *
 677  * FUNCTION:    acpi_ut_strtoul64
 678  *
 679  * PARAMETERS:  String          - Null terminated string
 680  *              Base            - Radix of the string: 16 or ACPI_ANY_BASE;
 681  *                                ACPI_ANY_BASE means 'in behalf of to_integer'
 682  *              ret_integer     - Where the converted integer is returned
 683  *
 684  * RETURN:      Status and Converted value
 685  *
 686  * DESCRIPTION: Convert a string into an unsigned value. Performs either a
 687  *              32-bit or 64-bit conversion, depending on the current mode
 688  *              of the interpreter.
 689  *              NOTE: Does not support Octal strings, not needed.
 690  *
 691  ******************************************************************************/
 692
 693 acpi_status
 694 acpi_ut_strtoul64(char *string, u32 base, acpi_integer * ret_integer)
 695 {
 696         u32 this_digit = 0;
 697         acpi_integer return_value = 0;
 698         acpi_integer quotient;
 699         acpi_integer dividend;
 700         u32 to_integer_op = (base == ACPI_ANY_BASE);
 701         u32 mode32 = (acpi_gbl_integer_byte_width == 4);
 702         u8 valid_digits = 0;
 703         u8 sign_of0x = 0;
 704         u8 term = 0;
 705
 706         ACPI_FUNCTION_TRACE_STR(ut_stroul64, string);
 707
 708         switch (base) {
 709         case ACPI_ANY_BASE:
 710         case 16:
 711                 break;
 712
 713         default:
 714                 /* Invalid Base */
 715                 return_ACPI_STATUS(AE_BAD_PARAMETER);
 716         }
 717
 718         if (!string) {
 719                 goto error_exit;
 720         }
 721
 722         /* Skip over any white space in the buffer */
 723
 724         while ((*string) && (ACPI_IS_SPACE(*string) || *string == '\t')) {
 725                 string++;
 726         }
 727
 728         if (to_integer_op) {
 729                 /*
 730                  * Base equal to ACPI_ANY_BASE means 'to_integer operation case'.
 731                  * We need to determine if it is decimal or hexadecimal.
 732                  */
 733                 if ((*string == '0') && (ACPI_TOLOWER(*(string + 1)) == 'x')) {
 734                         sign_of0x = 1;
 735                         base = 16;
 736
 737                         /* Skip over the leading '0x' */
 738                         string += 2;
 739                 } else {
 740                         base = 10;
 741                 }
 742         }
 743
 744         /* Any string left? Check that '0x' is not followed by white space. */
 745
 746         if (!(*string) || ACPI_IS_SPACE(*string) || *string == '\t') {
 747                 if (to_integer_op) {
 748                         goto error_exit;
 749                 } else {
 750                         goto all_done;
 751                 }
 752         }
 753
 754         /*
 755          * Perform a 32-bit or 64-bit conversion, depending upon the current
 756          * execution mode of the interpreter
 757          */
 758         dividend = (mode32) ? ACPI_UINT32_MAX : ACPI_UINT64_MAX;
 759
 760         /* Main loop: convert the string to a 32- or 64-bit integer */
 761
 762         while (*string) {
 763                 if (ACPI_IS_DIGIT(*string)) {
 764
 765                         /* Convert ASCII 0-9 to Decimal value */
 766
 767                         this_digit = ((u8) * string) - '0';
 768                 } else if (base == 10) {
 769
 770                         /* Digit is out of range; possible in to_integer case only */
 771
 772                         term = 1;
 773                 } else {
 774                         this_digit = (u8) ACPI_TOUPPER(*string);
 775                         if (ACPI_IS_XDIGIT((char)this_digit)) {
 776
 777                                 /* Convert ASCII Hex char to value */
 778
 779                                 this_digit = this_digit - 'A' + 10;
 780                         } else {
 781                                 term = 1;
 782                         }
 783                 }
 784
 785                 if (term) {
 786                         if (to_integer_op) {
 787                                 goto error_exit;
 788                         } else {
 789                                 break;
 790                         }
 791                 } else if ((valid_digits == 0) && (this_digit == 0)
 792                            && !sign_of0x) {
 793
 794                         /* Skip zeros */
 795                         string++;
 796                         continue;
 797                 }
 798
 799                 valid_digits++;
 800
 801                 if (sign_of0x && ((valid_digits > 16)
 802                                   || ((valid_digits > 8) && mode32))) {
 803                         /*
 804                          * This is to_integer operation case.
 805                          * No any restrictions for string-to-integer conversion,
 806                          * see ACPI spec.
 807                          */
 808                         goto error_exit;
 809                 }
 810
 811                 /* Divide the digit into the correct position */
 812
 813                 (void)
 814                     acpi_ut_short_divide((dividend - (acpi_integer) this_digit),
 815                                          base, &quotient, NULL);
 816
 817                 if (return_value > quotient) {
 818                         if (to_integer_op) {
 819                                 goto error_exit;
 820                         } else {
 821                                 break;
 822                         }
 823                 }
 824
 825                 return_value *= base;
 826                 return_value += this_digit;
 827                 string++;
 828         }
 829
 830         /* All done, normal exit */
 831
 832       all_done:
 833
 834         ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n",
 835                           ACPI_FORMAT_UINT64(return_value)));
 836
 837         *ret_integer = return_value;
 838         return_ACPI_STATUS(AE_OK);
 839
 840       error_exit:
 841         /* Base was set/validated above */
 842
 843         if (base == 10) {
 844                 return_ACPI_STATUS(AE_BAD_DECIMAL_CONSTANT);
 845         } else {
 846                 return_ACPI_STATUS(AE_BAD_HEX_CONSTANT);
 847         }
 848 }
 849
 850 /*******************************************************************************
 851  *
 852  * FUNCTION:    acpi_ut_create_update_state_and_push
 853  *
 854  * PARAMETERS:  Object          - Object to be added to the new state
 855  *              Action          - Increment/Decrement
 856  *              state_list      - List the state will be added to
 857  *
 858  * RETURN:      Status
 859  *
 860  * DESCRIPTION: Create a new state and push it
 861  *
 862  ******************************************************************************/
 863
 864 acpi_status
 865 acpi_ut_create_update_state_and_push(union acpi_operand_object *object,
 866                                      u16 action,
 867                                      union acpi_generic_state **state_list)
 868 {
 869         union acpi_generic_state *state;
 870
 871         ACPI_FUNCTION_ENTRY();
 872
 873         /* Ignore null objects; these are expected */
 874
 875         if (!object) {
 876                 return (AE_OK);
 877         }
 878
 879         state = acpi_ut_create_update_state(object, action);
 880         if (!state) {
 881                 return (AE_NO_MEMORY);
 882         }
 883
 884         acpi_ut_push_generic_state(state_list, state);
 885         return (AE_OK);
 886 }
 887
 888 /*******************************************************************************
 889  *
 890  * FUNCTION:    acpi_ut_walk_package_tree
 891  *
 892  * PARAMETERS:  source_object       - The package to walk
 893  *              target_object       - Target object (if package is being copied)
 894  *              walk_callback       - Called once for each package element
 895  *              Context             - Passed to the callback function
 896  *
 897  * RETURN:      Status
 898  *
 899  * DESCRIPTION: Walk through a package
 900  *
 901  ******************************************************************************/
 902
 903 acpi_status
 904 acpi_ut_walk_package_tree(union acpi_operand_object * source_object,
 905                           void *target_object,
 906                           acpi_pkg_callback walk_callback, void *context)
 907 {
 908         acpi_status status = AE_OK;
 909         union acpi_generic_state *state_list = NULL;
 910         union acpi_generic_state *state;
 911         u32 this_index;
 912         union acpi_operand_object *this_source_obj;
 913
 914         ACPI_FUNCTION_TRACE(ut_walk_package_tree);
 915
 916         state = acpi_ut_create_pkg_state(source_object, target_object, 0);
 917         if (!state) {
 918                 return_ACPI_STATUS(AE_NO_MEMORY);
 919         }
 920
 921         while (state) {
 922
 923                 /* Get one element of the package */
 924
 925                 this_index = state->pkg.index;
 926                 this_source_obj = (union acpi_operand_object *)
 927                     state->pkg.source_object->package.elements[this_index];
 928
 929                 /*
 930                  * Check for:
 931                  * 1) An uninitialized package element.  It is completely
 932                  *    legal to declare a package and leave it uninitialized
 933                  * 2) Not an internal object - can be a namespace node instead
 934                  * 3) Any type other than a package.  Packages are handled in else
 935                  *    case below.
 936                  */
 937                 if ((!this_source_obj) ||
 938                     (ACPI_GET_DESCRIPTOR_TYPE(this_source_obj) !=
 939                      ACPI_DESC_TYPE_OPERAND)
 940                     || (ACPI_GET_OBJECT_TYPE(this_source_obj) !=
 941                         ACPI_TYPE_PACKAGE)) {
 942                         status =
 943                             walk_callback(ACPI_COPY_TYPE_SIMPLE,
 944                                           this_source_obj, state, context);
 945                         if (ACPI_FAILURE(status)) {
 946                                 return_ACPI_STATUS(status);
 947                         }
 948
 949                         state->pkg.index++;
 950                         while (state->pkg.index >=
 951                                state->pkg.source_object->package.count) {
 952                                 /*
 953                                  * We've handled all of the objects at this level,  This means
 954                                  * that we have just completed a package.  That package may
 955                                  * have contained one or more packages itself.
 956                                  *
 957                                  * Delete this state and pop the previous state (package).
 958                                  */
 959                                 acpi_ut_delete_generic_state(state);
 960                                 state = acpi_ut_pop_generic_state(&state_list);
 961
 962                                 /* Finished when there are no more states */
 963
 964                                 if (!state) {
 965                                         /*
 966                                          * We have handled all of the objects in the top level
 967                                          * package just add the length of the package objects
 968                                          * and exit
 969                                          */
 970                                         return_ACPI_STATUS(AE_OK);
 971                                 }
 972
 973                                 /*
 974                                  * Go back up a level and move the index past the just
 975                                  * completed package object.
 976                                  */
 977                                 state->pkg.index++;
 978                         }
 979                 } else {
 980                         /* This is a subobject of type package */
 981
 982                         status =
 983                             walk_callback(ACPI_COPY_TYPE_PACKAGE,
 984                                           this_source_obj, state, context);
 985                         if (ACPI_FAILURE(status)) {
 986                                 return_ACPI_STATUS(status);
 987                         }
 988
 989                         /*
 990                          * Push the current state and create a new one
 991                          * The callback above returned a new target package object.
 992                          */
 993                         acpi_ut_push_generic_state(&state_list, state);
 994                         state = acpi_ut_create_pkg_state(this_source_obj,
 995                                                          state->pkg.
 996                                                          this_target_obj, 0);
 997                         if (!state) {
 998                                 return_ACPI_STATUS(AE_NO_MEMORY);
 999                         }
1000                 }
1001         }
1002
1003         /* We should never get here */
1004
1005         return_ACPI_STATUS(AE_AML_INTERNAL);
1006 }
1007
1008 /*******************************************************************************
1009  *
1010  * FUNCTION:    acpi_ut_error, acpi_ut_warning, acpi_ut_info
1011  *
1012  * PARAMETERS:  module_name         - Caller's module name (for error output)
1013  *              line_number         - Caller's line number (for error output)
1014  *              Format              - Printf format string + additional args
1015  *
1016  * RETURN:      None
1017  *
1018  * DESCRIPTION: Print message with module/line/version info
1019  *
1020  ******************************************************************************/
1021
1022 void ACPI_INTERNAL_VAR_XFACE
1023 acpi_ut_error(const char *module_name, u32 line_number, const char *format, ...)
1024 {
1025         va_list args;
1026
1027         acpi_os_printf("ACPI Error (%s-%04d): ", module_name, line_number);
1028
1029         va_start(args, format);
1030         acpi_os_vprintf(format, args);
1031         acpi_os_printf(" [%X]\n", ACPI_CA_VERSION);
1032         va_end(args);
1033 }
1034
1035 void ACPI_INTERNAL_VAR_XFACE
1036 acpi_ut_exception(const char *module_name,
1037                   u32 line_number, acpi_status status, const char *format, ...)
1038 {
1039         va_list args;
1040
1041         acpi_os_printf("ACPI Exception (%s-%04d): %s, ", module_name,
1042                        line_number, acpi_format_exception(status));
1043
1044         va_start(args, format);
1045         acpi_os_vprintf(format, args);
1046         acpi_os_printf(" [%X]\n", ACPI_CA_VERSION);
1047         va_end(args);
1048 }
1049
1050 EXPORT_SYMBOL(acpi_ut_exception);
1051
1052 void ACPI_INTERNAL_VAR_XFACE
1053 acpi_ut_warning(const char *module_name,
1054                 u32 line_number, const char *format, ...)
1055 {
1056         va_list args;
1057
1058         acpi_os_printf("ACPI Warning (%s-%04d): ", module_name, line_number);
1059
1060         va_start(args, format);
1061         acpi_os_vprintf(format, args);
1062         acpi_os_printf(" [%X]\n", ACPI_CA_VERSION);
1063         va_end(args);
1064 }
1065
1066 void ACPI_INTERNAL_VAR_XFACE
1067 acpi_ut_info(const char *module_name, u32 line_number, const char *format, ...)
1068 {
1069         va_list args;
1070
1071         /*
1072          * Removed module_name, line_number, and acpica version, not needed
1073          * for info output
1074          */
1075         acpi_os_printf("ACPI: ");
1076
1077         va_start(args, format);
1078         acpi_os_vprintf(format, args);
1079         acpi_os_printf("\n");
1080         va_end(args);
1081 }