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 "accommon.h" 48 #include "acnamesp.h" 49 50 #define _COMPONENT ACPI_UTILITIES 51 ACPI_MODULE_NAME("utmisc") 52 53 /******************************************************************************* 54 * 55 * FUNCTION: acpi_ut_validate_exception 56 * 57 * PARAMETERS: Status - The acpi_status code to be formatted 58 * 59 * RETURN: A string containing the exception text. NULL if exception is 60 * not valid. 61 * 62 * DESCRIPTION: This function validates and translates an ACPI exception into 63 * an ASCII string. 64 * 65 ******************************************************************************/ 66 const char *acpi_ut_validate_exception(acpi_status status) 67 { 68 u32 sub_status; 69 const char *exception = NULL; 70 71 ACPI_FUNCTION_ENTRY(); 72 73 /* 74 * Status is composed of two parts, a "type" and an actual code 75 */ 76 sub_status = (status & ~AE_CODE_MASK); 77 78 switch (status & AE_CODE_MASK) { 79 case AE_CODE_ENVIRONMENTAL: 80 81 if (sub_status <= AE_CODE_ENV_MAX) { 82 exception = acpi_gbl_exception_names_env[sub_status]; 83 } 84 break; 85 86 case AE_CODE_PROGRAMMER: 87 88 if (sub_status <= AE_CODE_PGM_MAX) { 89 exception = acpi_gbl_exception_names_pgm[sub_status]; 90 } 91 break; 92 93 case AE_CODE_ACPI_TABLES: 94 95 if (sub_status <= AE_CODE_TBL_MAX) { 96 exception = acpi_gbl_exception_names_tbl[sub_status]; 97 } 98 break; 99 100 case AE_CODE_AML: 101 102 if (sub_status <= AE_CODE_AML_MAX) { 103 exception = acpi_gbl_exception_names_aml[sub_status]; 104 } 105 break; 106 107 case AE_CODE_CONTROL: 108 109 if (sub_status <= AE_CODE_CTRL_MAX) { 110 exception = acpi_gbl_exception_names_ctrl[sub_status]; 111 } 112 break; 113 114 default: 115 break; 116 } 117 118 return (ACPI_CAST_PTR(const char, exception)); 119 } 120 121 /******************************************************************************* 122 * 123 * FUNCTION: acpi_ut_is_aml_table 124 * 125 * PARAMETERS: Table - An ACPI table 126 * 127 * RETURN: TRUE if table contains executable AML; FALSE otherwise 128 * 129 * DESCRIPTION: Check ACPI Signature for a table that contains AML code. 130 * Currently, these are DSDT,SSDT,PSDT. All other table types are 131 * data tables that do not contain AML code. 132 * 133 ******************************************************************************/ 134 135 u8 acpi_ut_is_aml_table(struct acpi_table_header *table) 136 { 137 138 /* These are the only tables that contain executable AML */ 139 140 if (ACPI_COMPARE_NAME(table->signature, ACPI_SIG_DSDT) || 141 ACPI_COMPARE_NAME(table->signature, ACPI_SIG_PSDT) || 142 ACPI_COMPARE_NAME(table->signature, ACPI_SIG_SSDT)) { 143 return (TRUE); 144 } 145 146 return (FALSE); 147 } 148 149 /******************************************************************************* 150 * 151 * FUNCTION: acpi_ut_allocate_owner_id 152 * 153 * PARAMETERS: owner_id - Where the new owner ID is returned 154 * 155 * RETURN: Status 156 * 157 * DESCRIPTION: Allocate a table or method owner ID. The owner ID is used to 158 * track objects created by the table or method, to be deleted 159 * when the method exits or the table is unloaded. 160 * 161 ******************************************************************************/ 162 163 acpi_status acpi_ut_allocate_owner_id(acpi_owner_id * owner_id) 164 { 165 u32 i; 166 u32 j; 167 u32 k; 168 acpi_status status; 169 170 ACPI_FUNCTION_TRACE(ut_allocate_owner_id); 171 172 /* Guard against multiple allocations of ID to the same location */ 173 174 if (*owner_id) { 175 ACPI_ERROR((AE_INFO, "Owner ID [%2.2X] already exists", 176 *owner_id)); 177 return_ACPI_STATUS(AE_ALREADY_EXISTS); 178 } 179 180 /* Mutex for the global ID mask */ 181 182 status = acpi_ut_acquire_mutex(ACPI_MTX_CACHES); 183 if (ACPI_FAILURE(status)) { 184 return_ACPI_STATUS(status); 185 } 186 187 /* 188 * Find a free owner ID, cycle through all possible IDs on repeated 189 * allocations. (ACPI_NUM_OWNERID_MASKS + 1) because first index may have 190 * to be scanned twice. 191 */ 192 for (i = 0, j = acpi_gbl_last_owner_id_index; 193 i < (ACPI_NUM_OWNERID_MASKS + 1); i++, j++) { 194 if (j >= ACPI_NUM_OWNERID_MASKS) { 195 j = 0; /* Wraparound to start of mask array */ 196 } 197 198 for (k = acpi_gbl_next_owner_id_offset; k < 32; k++) { 199 if (acpi_gbl_owner_id_mask[j] == ACPI_UINT32_MAX) { 200 201 /* There are no free IDs in this mask */ 202 203 break; 204 } 205 206 if (!(acpi_gbl_owner_id_mask[j] & (1 << k))) { 207 /* 208 * Found a free ID. The actual ID is the bit index plus one, 209 * making zero an invalid Owner ID. Save this as the last ID 210 * allocated and update the global ID mask. 211 */ 212 acpi_gbl_owner_id_mask[j] |= (1 << k); 213 214 acpi_gbl_last_owner_id_index = (u8) j; 215 acpi_gbl_next_owner_id_offset = (u8) (k + 1); 216 217 /* 218 * Construct encoded ID from the index and bit position 219 * 220 * Note: Last [j].k (bit 255) is never used and is marked 221 * permanently allocated (prevents +1 overflow) 222 */ 223 *owner_id = 224 (acpi_owner_id) ((k + 1) + ACPI_MUL_32(j)); 225 226 ACPI_DEBUG_PRINT((ACPI_DB_VALUES, 227 "Allocated OwnerId: %2.2X\n", 228 (unsigned int)*owner_id)); 229 goto exit; 230 } 231 } 232 233 acpi_gbl_next_owner_id_offset = 0; 234 } 235 236 /* 237 * All owner_ids have been allocated. This typically should 238 * not happen since the IDs are reused after deallocation. The IDs are 239 * allocated upon table load (one per table) and method execution, and 240 * they are released when a table is unloaded or a method completes 241 * execution. 242 * 243 * If this error happens, there may be very deep nesting of invoked control 244 * methods, or there may be a bug where the IDs are not released. 245 */ 246 status = AE_OWNER_ID_LIMIT; 247 ACPI_ERROR((AE_INFO, 248 "Could not allocate new OwnerId (255 max), AE_OWNER_ID_LIMIT")); 249 250 exit: 251 (void)acpi_ut_release_mutex(ACPI_MTX_CACHES); 252 return_ACPI_STATUS(status); 253 } 254 255 /******************************************************************************* 256 * 257 * FUNCTION: acpi_ut_release_owner_id 258 * 259 * PARAMETERS: owner_id_ptr - Pointer to a previously allocated owner_iD 260 * 261 * RETURN: None. No error is returned because we are either exiting a 262 * control method or unloading a table. Either way, we would 263 * ignore any error anyway. 264 * 265 * DESCRIPTION: Release a table or method owner ID. Valid IDs are 1 - 255 266 * 267 ******************************************************************************/ 268 269 void acpi_ut_release_owner_id(acpi_owner_id * owner_id_ptr) 270 { 271 acpi_owner_id owner_id = *owner_id_ptr; 272 acpi_status status; 273 u32 index; 274 u32 bit; 275 276 ACPI_FUNCTION_TRACE_U32(ut_release_owner_id, owner_id); 277 278 /* Always clear the input owner_id (zero is an invalid ID) */ 279 280 *owner_id_ptr = 0; 281 282 /* Zero is not a valid owner_iD */ 283 284 if (owner_id == 0) { 285 ACPI_ERROR((AE_INFO, "Invalid OwnerId: %2.2X", owner_id)); 286 return_VOID; 287 } 288 289 /* Mutex for the global ID mask */ 290 291 status = acpi_ut_acquire_mutex(ACPI_MTX_CACHES); 292 if (ACPI_FAILURE(status)) { 293 return_VOID; 294 } 295 296 /* Normalize the ID to zero */ 297 298 owner_id--; 299 300 /* Decode ID to index/offset pair */ 301 302 index = ACPI_DIV_32(owner_id); 303 bit = 1 << ACPI_MOD_32(owner_id); 304 305 /* Free the owner ID only if it is valid */ 306 307 if (acpi_gbl_owner_id_mask[index] & bit) { 308 acpi_gbl_owner_id_mask[index] ^= bit; 309 } else { 310 ACPI_ERROR((AE_INFO, 311 "Release of non-allocated OwnerId: %2.2X", 312 owner_id + 1)); 313 } 314 315 (void)acpi_ut_release_mutex(ACPI_MTX_CACHES); 316 return_VOID; 317 } 318 319 /******************************************************************************* 320 * 321 * FUNCTION: acpi_ut_strupr (strupr) 322 * 323 * PARAMETERS: src_string - The source string to convert 324 * 325 * RETURN: None 326 * 327 * DESCRIPTION: Convert string to uppercase 328 * 329 * NOTE: This is not a POSIX function, so it appears here, not in utclib.c 330 * 331 ******************************************************************************/ 332 333 void acpi_ut_strupr(char *src_string) 334 { 335 char *string; 336 337 ACPI_FUNCTION_ENTRY(); 338 339 if (!src_string) { 340 return; 341 } 342 343 /* Walk entire string, uppercasing the letters */ 344 345 for (string = src_string; *string; string++) { 346 *string = (char)ACPI_TOUPPER(*string); 347 } 348 349 return; 350 } 351 352 /******************************************************************************* 353 * 354 * FUNCTION: acpi_ut_print_string 355 * 356 * PARAMETERS: String - Null terminated ASCII string 357 * max_length - Maximum output length 358 * 359 * RETURN: None 360 * 361 * DESCRIPTION: Dump an ASCII string with support for ACPI-defined escape 362 * sequences. 363 * 364 ******************************************************************************/ 365 366 void acpi_ut_print_string(char *string, u8 max_length) 367 { 368 u32 i; 369 370 if (!string) { 371 acpi_os_printf("<\"NULL STRING PTR\">"); 372 return; 373 } 374 375 acpi_os_printf("\""); 376 for (i = 0; string[i] && (i < max_length); i++) { 377 378 /* Escape sequences */ 379 380 switch (string[i]) { 381 case 0x07: 382 acpi_os_printf("\\a"); /* BELL */ 383 break; 384 385 case 0x08: 386 acpi_os_printf("\\b"); /* BACKSPACE */ 387 break; 388 389 case 0x0C: 390 acpi_os_printf("\\f"); /* FORMFEED */ 391 break; 392 393 case 0x0A: 394 acpi_os_printf("\\n"); /* LINEFEED */ 395 break; 396 397 case 0x0D: 398 acpi_os_printf("\\r"); /* CARRIAGE RETURN */ 399 break; 400 401 case 0x09: 402 acpi_os_printf("\\t"); /* HORIZONTAL TAB */ 403 break; 404 405 case 0x0B: 406 acpi_os_printf("\\v"); /* VERTICAL TAB */ 407 break; 408 409 case '\'': /* Single Quote */ 410 case '\"': /* Double Quote */ 411 case '\\': /* Backslash */ 412 acpi_os_printf("\\%c", (int)string[i]); 413 break; 414 415 default: 416 417 /* Check for printable character or hex escape */ 418 419 if (ACPI_IS_PRINT(string[i])) { 420 /* This is a normal character */ 421 422 acpi_os_printf("%c", (int)string[i]); 423 } else { 424 /* All others will be Hex escapes */ 425 426 acpi_os_printf("\\x%2.2X", (s32) string[i]); 427 } 428 break; 429 } 430 } 431 acpi_os_printf("\""); 432 433 if (i == max_length && string[i]) { 434 acpi_os_printf("..."); 435 } 436 } 437 438 /******************************************************************************* 439 * 440 * FUNCTION: acpi_ut_dword_byte_swap 441 * 442 * PARAMETERS: Value - Value to be converted 443 * 444 * RETURN: u32 integer with bytes swapped 445 * 446 * DESCRIPTION: Convert a 32-bit value to big-endian (swap the bytes) 447 * 448 ******************************************************************************/ 449 450 u32 acpi_ut_dword_byte_swap(u32 value) 451 { 452 union { 453 u32 value; 454 u8 bytes[4]; 455 } out; 456 union { 457 u32 value; 458 u8 bytes[4]; 459 } in; 460 461 ACPI_FUNCTION_ENTRY(); 462 463 in.value = value; 464 465 out.bytes[0] = in.bytes[3]; 466 out.bytes[1] = in.bytes[2]; 467 out.bytes[2] = in.bytes[1]; 468 out.bytes[3] = in.bytes[0]; 469 470 return (out.value); 471 } 472 473 /******************************************************************************* 474 * 475 * FUNCTION: acpi_ut_set_integer_width 476 * 477 * PARAMETERS: Revision From DSDT header 478 * 479 * RETURN: None 480 * 481 * DESCRIPTION: Set the global integer bit width based upon the revision 482 * of the DSDT. For Revision 1 and 0, Integers are 32 bits. 483 * For Revision 2 and above, Integers are 64 bits. Yes, this 484 * makes a difference. 485 * 486 ******************************************************************************/ 487 488 void acpi_ut_set_integer_width(u8 revision) 489 { 490 491 if (revision < 2) { 492 493 /* 32-bit case */ 494 495 acpi_gbl_integer_bit_width = 32; 496 acpi_gbl_integer_nybble_width = 8; 497 acpi_gbl_integer_byte_width = 4; 498 } else { 499 /* 64-bit case (ACPI 2.0+) */ 500 501 acpi_gbl_integer_bit_width = 64; 502 acpi_gbl_integer_nybble_width = 16; 503 acpi_gbl_integer_byte_width = 8; 504 } 505 } 506 507 #ifdef ACPI_DEBUG_OUTPUT 508 /******************************************************************************* 509 * 510 * FUNCTION: acpi_ut_display_init_pathname 511 * 512 * PARAMETERS: Type - Object type of the node 513 * obj_handle - Handle whose pathname will be displayed 514 * Path - Additional path string to be appended. 515 * (NULL if no extra path) 516 * 517 * RETURN: acpi_status 518 * 519 * DESCRIPTION: Display full pathname of an object, DEBUG ONLY 520 * 521 ******************************************************************************/ 522 523 void 524 acpi_ut_display_init_pathname(u8 type, 525 struct acpi_namespace_node *obj_handle, 526 char *path) 527 { 528 acpi_status status; 529 struct acpi_buffer buffer; 530 531 ACPI_FUNCTION_ENTRY(); 532 533 /* Only print the path if the appropriate debug level is enabled */ 534 535 if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) { 536 return; 537 } 538 539 /* Get the full pathname to the node */ 540 541 buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER; 542 status = acpi_ns_handle_to_pathname(obj_handle, &buffer); 543 if (ACPI_FAILURE(status)) { 544 return; 545 } 546 547 /* Print what we're doing */ 548 549 switch (type) { 550 case ACPI_TYPE_METHOD: 551 acpi_os_printf("Executing "); 552 break; 553 554 default: 555 acpi_os_printf("Initializing "); 556 break; 557 } 558 559 /* Print the object type and pathname */ 560 561 acpi_os_printf("%-12s %s", 562 acpi_ut_get_type_name(type), (char *)buffer.pointer); 563 564 /* Extra path is used to append names like _STA, _INI, etc. */ 565 566 if (path) { 567 acpi_os_printf(".%s", path); 568 } 569 acpi_os_printf("\n"); 570 571 ACPI_FREE(buffer.pointer); 572 } 573 #endif 574 575 /******************************************************************************* 576 * 577 * FUNCTION: acpi_ut_valid_acpi_char 578 * 579 * PARAMETERS: Char - The character to be examined 580 * Position - Byte position (0-3) 581 * 582 * RETURN: TRUE if the character is valid, FALSE otherwise 583 * 584 * DESCRIPTION: Check for a valid ACPI character. Must be one of: 585 * 1) Upper case alpha 586 * 2) numeric 587 * 3) underscore 588 * 589 * We allow a '!' as the last character because of the ASF! table 590 * 591 ******************************************************************************/ 592 593 u8 acpi_ut_valid_acpi_char(char character, u32 position) 594 { 595 596 if (!((character >= 'A' && character <= 'Z') || 597 (character >= '0' && character <= '9') || (character == '_'))) { 598 599 /* Allow a '!' in the last position */ 600 601 if (character == '!' && position == 3) { 602 return (TRUE); 603 } 604 605 return (FALSE); 606 } 607 608 return (TRUE); 609 } 610 611 /******************************************************************************* 612 * 613 * FUNCTION: acpi_ut_valid_acpi_name 614 * 615 * PARAMETERS: Name - The name to be examined 616 * 617 * RETURN: TRUE if the name is valid, FALSE otherwise 618 * 619 * DESCRIPTION: Check for a valid ACPI name. Each character must be one of: 620 * 1) Upper case alpha 621 * 2) numeric 622 * 3) underscore 623 * 624 ******************************************************************************/ 625 626 u8 acpi_ut_valid_acpi_name(u32 name) 627 { 628 u32 i; 629 630 ACPI_FUNCTION_ENTRY(); 631 632 for (i = 0; i < ACPI_NAME_SIZE; i++) { 633 if (!acpi_ut_valid_acpi_char 634 ((ACPI_CAST_PTR(char, &name))[i], i)) { 635 return (FALSE); 636 } 637 } 638 639 return (TRUE); 640 } 641 642 /******************************************************************************* 643 * 644 * FUNCTION: acpi_ut_repair_name 645 * 646 * PARAMETERS: Name - The ACPI name to be repaired 647 * 648 * RETURN: Repaired version of the name 649 * 650 * DESCRIPTION: Repair an ACPI name: Change invalid characters to '*' and 651 * return the new name. 652 * 653 ******************************************************************************/ 654 655 acpi_name acpi_ut_repair_name(char *name) 656 { 657 u32 i; 658 char new_name[ACPI_NAME_SIZE]; 659 660 for (i = 0; i < ACPI_NAME_SIZE; i++) { 661 new_name[i] = name[i]; 662 663 /* 664 * Replace a bad character with something printable, yet technically 665 * still invalid. This prevents any collisions with existing "good" 666 * names in the namespace. 667 */ 668 if (!acpi_ut_valid_acpi_char(name[i], i)) { 669 new_name[i] = '*'; 670 } 671 } 672 673 return (*(u32 *) new_name); 674 } 675 676 /******************************************************************************* 677 * 678 * FUNCTION: acpi_ut_strtoul64 679 * 680 * PARAMETERS: String - Null terminated string 681 * Base - Radix of the string: 16 or ACPI_ANY_BASE; 682 * ACPI_ANY_BASE means 'in behalf of to_integer' 683 * ret_integer - Where the converted integer is returned 684 * 685 * RETURN: Status and Converted value 686 * 687 * DESCRIPTION: Convert a string into an unsigned value. Performs either a 688 * 32-bit or 64-bit conversion, depending on the current mode 689 * of the interpreter. 690 * NOTE: Does not support Octal strings, not needed. 691 * 692 ******************************************************************************/ 693 694 acpi_status 695 acpi_ut_strtoul64(char *string, u32 base, acpi_integer * ret_integer) 696 { 697 u32 this_digit = 0; 698 acpi_integer return_value = 0; 699 acpi_integer quotient; 700 acpi_integer dividend; 701 u32 to_integer_op = (base == ACPI_ANY_BASE); 702 u32 mode32 = (acpi_gbl_integer_byte_width == 4); 703 u8 valid_digits = 0; 704 u8 sign_of0x = 0; 705 u8 term = 0; 706 707 ACPI_FUNCTION_TRACE_STR(ut_stroul64, string); 708 709 switch (base) { 710 case ACPI_ANY_BASE: 711 case 16: 712 break; 713 714 default: 715 /* Invalid Base */ 716 return_ACPI_STATUS(AE_BAD_PARAMETER); 717 } 718 719 if (!string) { 720 goto error_exit; 721 } 722 723 /* Skip over any white space in the buffer */ 724 725 while ((*string) && (ACPI_IS_SPACE(*string) || *string == '\t')) { 726 string++; 727 } 728 729 if (to_integer_op) { 730 /* 731 * Base equal to ACPI_ANY_BASE means 'to_integer operation case'. 732 * We need to determine if it is decimal or hexadecimal. 733 */ 734 if ((*string == '0') && (ACPI_TOLOWER(*(string + 1)) == 'x')) { 735 sign_of0x = 1; 736 base = 16; 737 738 /* Skip over the leading '0x' */ 739 string += 2; 740 } else { 741 base = 10; 742 } 743 } 744 745 /* Any string left? Check that '0x' is not followed by white space. */ 746 747 if (!(*string) || ACPI_IS_SPACE(*string) || *string == '\t') { 748 if (to_integer_op) { 749 goto error_exit; 750 } else { 751 goto all_done; 752 } 753 } 754 755 /* 756 * Perform a 32-bit or 64-bit conversion, depending upon the current 757 * execution mode of the interpreter 758 */ 759 dividend = (mode32) ? ACPI_UINT32_MAX : ACPI_UINT64_MAX; 760 761 /* Main loop: convert the string to a 32- or 64-bit integer */ 762 763 while (*string) { 764 if (ACPI_IS_DIGIT(*string)) { 765 766 /* Convert ASCII 0-9 to Decimal value */ 767 768 this_digit = ((u8) * string) - '0'; 769 } else if (base == 10) { 770 771 /* Digit is out of range; possible in to_integer case only */ 772 773 term = 1; 774 } else { 775 this_digit = (u8) ACPI_TOUPPER(*string); 776 if (ACPI_IS_XDIGIT((char)this_digit)) { 777 778 /* Convert ASCII Hex char to value */ 779 780 this_digit = this_digit - 'A' + 10; 781 } else { 782 term = 1; 783 } 784 } 785 786 if (term) { 787 if (to_integer_op) { 788 goto error_exit; 789 } else { 790 break; 791 } 792 } else if ((valid_digits == 0) && (this_digit == 0) 793 && !sign_of0x) { 794 795 /* Skip zeros */ 796 string++; 797 continue; 798 } 799 800 valid_digits++; 801 802 if (sign_of0x && ((valid_digits > 16) 803 || ((valid_digits > 8) && mode32))) { 804 /* 805 * This is to_integer operation case. 806 * No any restrictions for string-to-integer conversion, 807 * see ACPI spec. 808 */ 809 goto error_exit; 810 } 811 812 /* Divide the digit into the correct position */ 813 814 (void) 815 acpi_ut_short_divide((dividend - (acpi_integer) this_digit), 816 base, "ient, NULL); 817 818 if (return_value > quotient) { 819 if (to_integer_op) { 820 goto error_exit; 821 } else { 822 break; 823 } 824 } 825 826 return_value *= base; 827 return_value += this_digit; 828 string++; 829 } 830 831 /* All done, normal exit */ 832 833 all_done: 834 835 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n", 836 ACPI_FORMAT_UINT64(return_value))); 837 838 *ret_integer = return_value; 839 return_ACPI_STATUS(AE_OK); 840 841 error_exit: 842 /* Base was set/validated above */ 843 844 if (base == 10) { 845 return_ACPI_STATUS(AE_BAD_DECIMAL_CONSTANT); 846 } else { 847 return_ACPI_STATUS(AE_BAD_HEX_CONSTANT); 848 } 849 } 850 851 /******************************************************************************* 852 * 853 * FUNCTION: acpi_ut_create_update_state_and_push 854 * 855 * PARAMETERS: Object - Object to be added to the new state 856 * Action - Increment/Decrement 857 * state_list - List the state will be added to 858 * 859 * RETURN: Status 860 * 861 * DESCRIPTION: Create a new state and push it 862 * 863 ******************************************************************************/ 864 865 acpi_status 866 acpi_ut_create_update_state_and_push(union acpi_operand_object *object, 867 u16 action, 868 union acpi_generic_state **state_list) 869 { 870 union acpi_generic_state *state; 871 872 ACPI_FUNCTION_ENTRY(); 873 874 /* Ignore null objects; these are expected */ 875 876 if (!object) { 877 return (AE_OK); 878 } 879 880 state = acpi_ut_create_update_state(object, action); 881 if (!state) { 882 return (AE_NO_MEMORY); 883 } 884 885 acpi_ut_push_generic_state(state_list, state); 886 return (AE_OK); 887 } 888 889 /******************************************************************************* 890 * 891 * FUNCTION: acpi_ut_walk_package_tree 892 * 893 * PARAMETERS: source_object - The package to walk 894 * target_object - Target object (if package is being copied) 895 * walk_callback - Called once for each package element 896 * Context - Passed to the callback function 897 * 898 * RETURN: Status 899 * 900 * DESCRIPTION: Walk through a package 901 * 902 ******************************************************************************/ 903 904 acpi_status 905 acpi_ut_walk_package_tree(union acpi_operand_object * source_object, 906 void *target_object, 907 acpi_pkg_callback walk_callback, void *context) 908 { 909 acpi_status status = AE_OK; 910 union acpi_generic_state *state_list = NULL; 911 union acpi_generic_state *state; 912 u32 this_index; 913 union acpi_operand_object *this_source_obj; 914 915 ACPI_FUNCTION_TRACE(ut_walk_package_tree); 916 917 state = acpi_ut_create_pkg_state(source_object, target_object, 0); 918 if (!state) { 919 return_ACPI_STATUS(AE_NO_MEMORY); 920 } 921 922 while (state) { 923 924 /* Get one element of the package */ 925 926 this_index = state->pkg.index; 927 this_source_obj = (union acpi_operand_object *) 928 state->pkg.source_object->package.elements[this_index]; 929 930 /* 931 * Check for: 932 * 1) An uninitialized package element. It is completely 933 * legal to declare a package and leave it uninitialized 934 * 2) Not an internal object - can be a namespace node instead 935 * 3) Any type other than a package. Packages are handled in else 936 * case below. 937 */ 938 if ((!this_source_obj) || 939 (ACPI_GET_DESCRIPTOR_TYPE(this_source_obj) != 940 ACPI_DESC_TYPE_OPERAND) 941 || (ACPI_GET_OBJECT_TYPE(this_source_obj) != 942 ACPI_TYPE_PACKAGE)) { 943 status = 944 walk_callback(ACPI_COPY_TYPE_SIMPLE, 945 this_source_obj, state, context); 946 if (ACPI_FAILURE(status)) { 947 return_ACPI_STATUS(status); 948 } 949 950 state->pkg.index++; 951 while (state->pkg.index >= 952 state->pkg.source_object->package.count) { 953 /* 954 * We've handled all of the objects at this level, This means 955 * that we have just completed a package. That package may 956 * have contained one or more packages itself. 957 * 958 * Delete this state and pop the previous state (package). 959 */ 960 acpi_ut_delete_generic_state(state); 961 state = acpi_ut_pop_generic_state(&state_list); 962 963 /* Finished when there are no more states */ 964 965 if (!state) { 966 /* 967 * We have handled all of the objects in the top level 968 * package just add the length of the package objects 969 * and exit 970 */ 971 return_ACPI_STATUS(AE_OK); 972 } 973 974 /* 975 * Go back up a level and move the index past the just 976 * completed package object. 977 */ 978 state->pkg.index++; 979 } 980 } else { 981 /* This is a subobject of type package */ 982 983 status = 984 walk_callback(ACPI_COPY_TYPE_PACKAGE, 985 this_source_obj, state, context); 986 if (ACPI_FAILURE(status)) { 987 return_ACPI_STATUS(status); 988 } 989 990 /* 991 * Push the current state and create a new one 992 * The callback above returned a new target package object. 993 */ 994 acpi_ut_push_generic_state(&state_list, state); 995 state = acpi_ut_create_pkg_state(this_source_obj, 996 state->pkg. 997 this_target_obj, 0); 998 if (!state) { 999 1000 /* Free any stacked Update State objects */ 1001 1002 while (state_list) { 1003 state = 1004 acpi_ut_pop_generic_state 1005 (&state_list); 1006 acpi_ut_delete_generic_state(state); 1007 } 1008 return_ACPI_STATUS(AE_NO_MEMORY); 1009 } 1010 } 1011 } 1012 1013 /* We should never get here */ 1014 1015 return_ACPI_STATUS(AE_AML_INTERNAL); 1016 } 1017 1018 /******************************************************************************* 1019 * 1020 * FUNCTION: acpi_error, acpi_exception, acpi_warning, acpi_info 1021 * 1022 * PARAMETERS: module_name - Caller's module name (for error output) 1023 * line_number - Caller's line number (for error output) 1024 * Format - Printf format string + additional args 1025 * 1026 * RETURN: None 1027 * 1028 * DESCRIPTION: Print message with module/line/version info 1029 * 1030 ******************************************************************************/ 1031 1032 void ACPI_INTERNAL_VAR_XFACE 1033 acpi_error(const char *module_name, u32 line_number, const char *format, ...) 1034 { 1035 va_list args; 1036 1037 acpi_os_printf("ACPI Error (%s-%04d): ", module_name, line_number); 1038 1039 va_start(args, format); 1040 acpi_os_vprintf(format, args); 1041 acpi_os_printf(" [%X]\n", ACPI_CA_VERSION); 1042 va_end(args); 1043 } 1044 1045 void ACPI_INTERNAL_VAR_XFACE 1046 acpi_exception(const char *module_name, 1047 u32 line_number, acpi_status status, const char *format, ...) 1048 { 1049 va_list args; 1050 1051 acpi_os_printf("ACPI Exception (%s-%04d): %s, ", module_name, 1052 line_number, acpi_format_exception(status)); 1053 1054 va_start(args, format); 1055 acpi_os_vprintf(format, args); 1056 acpi_os_printf(" [%X]\n", ACPI_CA_VERSION); 1057 va_end(args); 1058 } 1059 1060 void ACPI_INTERNAL_VAR_XFACE 1061 acpi_warning(const char *module_name, u32 line_number, const char *format, ...) 1062 { 1063 va_list args; 1064 1065 acpi_os_printf("ACPI Warning (%s-%04d): ", module_name, line_number); 1066 1067 va_start(args, format); 1068 acpi_os_vprintf(format, args); 1069 acpi_os_printf(" [%X]\n", ACPI_CA_VERSION); 1070 va_end(args); 1071 } 1072 1073 void ACPI_INTERNAL_VAR_XFACE 1074 acpi_info(const char *module_name, u32 line_number, const char *format, ...) 1075 { 1076 va_list args; 1077 1078 /* 1079 * Removed module_name, line_number, and acpica version, not needed 1080 * for info output 1081 */ 1082 acpi_os_printf("ACPI: "); 1083 1084 va_start(args, format); 1085 acpi_os_vprintf(format, args); 1086 acpi_os_printf("\n"); 1087 va_end(args); 1088 } 1089 1090 ACPI_EXPORT_SYMBOL(acpi_error) 1091 ACPI_EXPORT_SYMBOL(acpi_exception) 1092 ACPI_EXPORT_SYMBOL(acpi_warning) 1093 ACPI_EXPORT_SYMBOL(acpi_info) 1094