1 /******************************************************************************* 2 * 3 * Module Name: utmisc - common utility procedures 4 * 5 ******************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2010, 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 * Common suffix for messages 55 */ 56 #define ACPI_COMMON_MSG_SUFFIX \ 57 acpi_os_printf(" (%8.8X/%s-%u)\n", ACPI_CA_VERSION, module_name, line_number) 58 /******************************************************************************* 59 * 60 * FUNCTION: acpi_ut_validate_exception 61 * 62 * PARAMETERS: Status - The acpi_status code to be formatted 63 * 64 * RETURN: A string containing the exception text. NULL if exception is 65 * not valid. 66 * 67 * DESCRIPTION: This function validates and translates an ACPI exception into 68 * an ASCII string. 69 * 70 ******************************************************************************/ 71 const char *acpi_ut_validate_exception(acpi_status status) 72 { 73 u32 sub_status; 74 const char *exception = NULL; 75 76 ACPI_FUNCTION_ENTRY(); 77 78 /* 79 * Status is composed of two parts, a "type" and an actual code 80 */ 81 sub_status = (status & ~AE_CODE_MASK); 82 83 switch (status & AE_CODE_MASK) { 84 case AE_CODE_ENVIRONMENTAL: 85 86 if (sub_status <= AE_CODE_ENV_MAX) { 87 exception = acpi_gbl_exception_names_env[sub_status]; 88 } 89 break; 90 91 case AE_CODE_PROGRAMMER: 92 93 if (sub_status <= AE_CODE_PGM_MAX) { 94 exception = acpi_gbl_exception_names_pgm[sub_status]; 95 } 96 break; 97 98 case AE_CODE_ACPI_TABLES: 99 100 if (sub_status <= AE_CODE_TBL_MAX) { 101 exception = acpi_gbl_exception_names_tbl[sub_status]; 102 } 103 break; 104 105 case AE_CODE_AML: 106 107 if (sub_status <= AE_CODE_AML_MAX) { 108 exception = acpi_gbl_exception_names_aml[sub_status]; 109 } 110 break; 111 112 case AE_CODE_CONTROL: 113 114 if (sub_status <= AE_CODE_CTRL_MAX) { 115 exception = acpi_gbl_exception_names_ctrl[sub_status]; 116 } 117 break; 118 119 default: 120 break; 121 } 122 123 return (ACPI_CAST_PTR(const char, exception)); 124 } 125 126 /******************************************************************************* 127 * 128 * FUNCTION: acpi_ut_is_pci_root_bridge 129 * 130 * PARAMETERS: Id - The HID/CID in string format 131 * 132 * RETURN: TRUE if the Id is a match for a PCI/PCI-Express Root Bridge 133 * 134 * DESCRIPTION: Determine if the input ID is a PCI Root Bridge ID. 135 * 136 ******************************************************************************/ 137 138 u8 acpi_ut_is_pci_root_bridge(char *id) 139 { 140 141 /* 142 * Check if this is a PCI root bridge. 143 * ACPI 3.0+: check for a PCI Express root also. 144 */ 145 if (!(ACPI_STRCMP(id, 146 PCI_ROOT_HID_STRING)) || 147 !(ACPI_STRCMP(id, PCI_EXPRESS_ROOT_HID_STRING))) { 148 return (TRUE); 149 } 150 151 return (FALSE); 152 } 153 154 /******************************************************************************* 155 * 156 * FUNCTION: acpi_ut_is_aml_table 157 * 158 * PARAMETERS: Table - An ACPI table 159 * 160 * RETURN: TRUE if table contains executable AML; FALSE otherwise 161 * 162 * DESCRIPTION: Check ACPI Signature for a table that contains AML code. 163 * Currently, these are DSDT,SSDT,PSDT. All other table types are 164 * data tables that do not contain AML code. 165 * 166 ******************************************************************************/ 167 168 u8 acpi_ut_is_aml_table(struct acpi_table_header *table) 169 { 170 171 /* These are the only tables that contain executable AML */ 172 173 if (ACPI_COMPARE_NAME(table->signature, ACPI_SIG_DSDT) || 174 ACPI_COMPARE_NAME(table->signature, ACPI_SIG_PSDT) || 175 ACPI_COMPARE_NAME(table->signature, ACPI_SIG_SSDT)) { 176 return (TRUE); 177 } 178 179 return (FALSE); 180 } 181 182 /******************************************************************************* 183 * 184 * FUNCTION: acpi_ut_allocate_owner_id 185 * 186 * PARAMETERS: owner_id - Where the new owner ID is returned 187 * 188 * RETURN: Status 189 * 190 * DESCRIPTION: Allocate a table or method owner ID. The owner ID is used to 191 * track objects created by the table or method, to be deleted 192 * when the method exits or the table is unloaded. 193 * 194 ******************************************************************************/ 195 196 acpi_status acpi_ut_allocate_owner_id(acpi_owner_id * owner_id) 197 { 198 u32 i; 199 u32 j; 200 u32 k; 201 acpi_status status; 202 203 ACPI_FUNCTION_TRACE(ut_allocate_owner_id); 204 205 /* Guard against multiple allocations of ID to the same location */ 206 207 if (*owner_id) { 208 ACPI_ERROR((AE_INFO, "Owner ID [0x%2.2X] already exists", 209 *owner_id)); 210 return_ACPI_STATUS(AE_ALREADY_EXISTS); 211 } 212 213 /* Mutex for the global ID mask */ 214 215 status = acpi_ut_acquire_mutex(ACPI_MTX_CACHES); 216 if (ACPI_FAILURE(status)) { 217 return_ACPI_STATUS(status); 218 } 219 220 /* 221 * Find a free owner ID, cycle through all possible IDs on repeated 222 * allocations. (ACPI_NUM_OWNERID_MASKS + 1) because first index may have 223 * to be scanned twice. 224 */ 225 for (i = 0, j = acpi_gbl_last_owner_id_index; 226 i < (ACPI_NUM_OWNERID_MASKS + 1); i++, j++) { 227 if (j >= ACPI_NUM_OWNERID_MASKS) { 228 j = 0; /* Wraparound to start of mask array */ 229 } 230 231 for (k = acpi_gbl_next_owner_id_offset; k < 32; k++) { 232 if (acpi_gbl_owner_id_mask[j] == ACPI_UINT32_MAX) { 233 234 /* There are no free IDs in this mask */ 235 236 break; 237 } 238 239 if (!(acpi_gbl_owner_id_mask[j] & (1 << k))) { 240 /* 241 * Found a free ID. The actual ID is the bit index plus one, 242 * making zero an invalid Owner ID. Save this as the last ID 243 * allocated and update the global ID mask. 244 */ 245 acpi_gbl_owner_id_mask[j] |= (1 << k); 246 247 acpi_gbl_last_owner_id_index = (u8) j; 248 acpi_gbl_next_owner_id_offset = (u8) (k + 1); 249 250 /* 251 * Construct encoded ID from the index and bit position 252 * 253 * Note: Last [j].k (bit 255) is never used and is marked 254 * permanently allocated (prevents +1 overflow) 255 */ 256 *owner_id = 257 (acpi_owner_id) ((k + 1) + ACPI_MUL_32(j)); 258 259 ACPI_DEBUG_PRINT((ACPI_DB_VALUES, 260 "Allocated OwnerId: %2.2X\n", 261 (unsigned int)*owner_id)); 262 goto exit; 263 } 264 } 265 266 acpi_gbl_next_owner_id_offset = 0; 267 } 268 269 /* 270 * All owner_ids have been allocated. This typically should 271 * not happen since the IDs are reused after deallocation. The IDs are 272 * allocated upon table load (one per table) and method execution, and 273 * they are released when a table is unloaded or a method completes 274 * execution. 275 * 276 * If this error happens, there may be very deep nesting of invoked control 277 * methods, or there may be a bug where the IDs are not released. 278 */ 279 status = AE_OWNER_ID_LIMIT; 280 ACPI_ERROR((AE_INFO, 281 "Could not allocate new OwnerId (255 max), AE_OWNER_ID_LIMIT")); 282 283 exit: 284 (void)acpi_ut_release_mutex(ACPI_MTX_CACHES); 285 return_ACPI_STATUS(status); 286 } 287 288 /******************************************************************************* 289 * 290 * FUNCTION: acpi_ut_release_owner_id 291 * 292 * PARAMETERS: owner_id_ptr - Pointer to a previously allocated owner_iD 293 * 294 * RETURN: None. No error is returned because we are either exiting a 295 * control method or unloading a table. Either way, we would 296 * ignore any error anyway. 297 * 298 * DESCRIPTION: Release a table or method owner ID. Valid IDs are 1 - 255 299 * 300 ******************************************************************************/ 301 302 void acpi_ut_release_owner_id(acpi_owner_id * owner_id_ptr) 303 { 304 acpi_owner_id owner_id = *owner_id_ptr; 305 acpi_status status; 306 u32 index; 307 u32 bit; 308 309 ACPI_FUNCTION_TRACE_U32(ut_release_owner_id, owner_id); 310 311 /* Always clear the input owner_id (zero is an invalid ID) */ 312 313 *owner_id_ptr = 0; 314 315 /* Zero is not a valid owner_iD */ 316 317 if (owner_id == 0) { 318 ACPI_ERROR((AE_INFO, "Invalid OwnerId: 0x%2.2X", owner_id)); 319 return_VOID; 320 } 321 322 /* Mutex for the global ID mask */ 323 324 status = acpi_ut_acquire_mutex(ACPI_MTX_CACHES); 325 if (ACPI_FAILURE(status)) { 326 return_VOID; 327 } 328 329 /* Normalize the ID to zero */ 330 331 owner_id--; 332 333 /* Decode ID to index/offset pair */ 334 335 index = ACPI_DIV_32(owner_id); 336 bit = 1 << ACPI_MOD_32(owner_id); 337 338 /* Free the owner ID only if it is valid */ 339 340 if (acpi_gbl_owner_id_mask[index] & bit) { 341 acpi_gbl_owner_id_mask[index] ^= bit; 342 } else { 343 ACPI_ERROR((AE_INFO, 344 "Release of non-allocated OwnerId: 0x%2.2X", 345 owner_id + 1)); 346 } 347 348 (void)acpi_ut_release_mutex(ACPI_MTX_CACHES); 349 return_VOID; 350 } 351 352 /******************************************************************************* 353 * 354 * FUNCTION: acpi_ut_strupr (strupr) 355 * 356 * PARAMETERS: src_string - The source string to convert 357 * 358 * RETURN: None 359 * 360 * DESCRIPTION: Convert string to uppercase 361 * 362 * NOTE: This is not a POSIX function, so it appears here, not in utclib.c 363 * 364 ******************************************************************************/ 365 366 void acpi_ut_strupr(char *src_string) 367 { 368 char *string; 369 370 ACPI_FUNCTION_ENTRY(); 371 372 if (!src_string) { 373 return; 374 } 375 376 /* Walk entire string, uppercasing the letters */ 377 378 for (string = src_string; *string; string++) { 379 *string = (char)ACPI_TOUPPER(*string); 380 } 381 382 return; 383 } 384 385 /******************************************************************************* 386 * 387 * FUNCTION: acpi_ut_print_string 388 * 389 * PARAMETERS: String - Null terminated ASCII string 390 * max_length - Maximum output length 391 * 392 * RETURN: None 393 * 394 * DESCRIPTION: Dump an ASCII string with support for ACPI-defined escape 395 * sequences. 396 * 397 ******************************************************************************/ 398 399 void acpi_ut_print_string(char *string, u8 max_length) 400 { 401 u32 i; 402 403 if (!string) { 404 acpi_os_printf("<\"NULL STRING PTR\">"); 405 return; 406 } 407 408 acpi_os_printf("\""); 409 for (i = 0; string[i] && (i < max_length); i++) { 410 411 /* Escape sequences */ 412 413 switch (string[i]) { 414 case 0x07: 415 acpi_os_printf("\\a"); /* BELL */ 416 break; 417 418 case 0x08: 419 acpi_os_printf("\\b"); /* BACKSPACE */ 420 break; 421 422 case 0x0C: 423 acpi_os_printf("\\f"); /* FORMFEED */ 424 break; 425 426 case 0x0A: 427 acpi_os_printf("\\n"); /* LINEFEED */ 428 break; 429 430 case 0x0D: 431 acpi_os_printf("\\r"); /* CARRIAGE RETURN */ 432 break; 433 434 case 0x09: 435 acpi_os_printf("\\t"); /* HORIZONTAL TAB */ 436 break; 437 438 case 0x0B: 439 acpi_os_printf("\\v"); /* VERTICAL TAB */ 440 break; 441 442 case '\'': /* Single Quote */ 443 case '\"': /* Double Quote */ 444 case '\\': /* Backslash */ 445 acpi_os_printf("\\%c", (int)string[i]); 446 break; 447 448 default: 449 450 /* Check for printable character or hex escape */ 451 452 if (ACPI_IS_PRINT(string[i])) { 453 /* This is a normal character */ 454 455 acpi_os_printf("%c", (int)string[i]); 456 } else { 457 /* All others will be Hex escapes */ 458 459 acpi_os_printf("\\x%2.2X", (s32) string[i]); 460 } 461 break; 462 } 463 } 464 acpi_os_printf("\""); 465 466 if (i == max_length && string[i]) { 467 acpi_os_printf("..."); 468 } 469 } 470 471 /******************************************************************************* 472 * 473 * FUNCTION: acpi_ut_dword_byte_swap 474 * 475 * PARAMETERS: Value - Value to be converted 476 * 477 * RETURN: u32 integer with bytes swapped 478 * 479 * DESCRIPTION: Convert a 32-bit value to big-endian (swap the bytes) 480 * 481 ******************************************************************************/ 482 483 u32 acpi_ut_dword_byte_swap(u32 value) 484 { 485 union { 486 u32 value; 487 u8 bytes[4]; 488 } out; 489 union { 490 u32 value; 491 u8 bytes[4]; 492 } in; 493 494 ACPI_FUNCTION_ENTRY(); 495 496 in.value = value; 497 498 out.bytes[0] = in.bytes[3]; 499 out.bytes[1] = in.bytes[2]; 500 out.bytes[2] = in.bytes[1]; 501 out.bytes[3] = in.bytes[0]; 502 503 return (out.value); 504 } 505 506 /******************************************************************************* 507 * 508 * FUNCTION: acpi_ut_set_integer_width 509 * 510 * PARAMETERS: Revision From DSDT header 511 * 512 * RETURN: None 513 * 514 * DESCRIPTION: Set the global integer bit width based upon the revision 515 * of the DSDT. For Revision 1 and 0, Integers are 32 bits. 516 * For Revision 2 and above, Integers are 64 bits. Yes, this 517 * makes a difference. 518 * 519 ******************************************************************************/ 520 521 void acpi_ut_set_integer_width(u8 revision) 522 { 523 524 if (revision < 2) { 525 526 /* 32-bit case */ 527 528 acpi_gbl_integer_bit_width = 32; 529 acpi_gbl_integer_nybble_width = 8; 530 acpi_gbl_integer_byte_width = 4; 531 } else { 532 /* 64-bit case (ACPI 2.0+) */ 533 534 acpi_gbl_integer_bit_width = 64; 535 acpi_gbl_integer_nybble_width = 16; 536 acpi_gbl_integer_byte_width = 8; 537 } 538 } 539 540 #ifdef ACPI_DEBUG_OUTPUT 541 /******************************************************************************* 542 * 543 * FUNCTION: acpi_ut_display_init_pathname 544 * 545 * PARAMETERS: Type - Object type of the node 546 * obj_handle - Handle whose pathname will be displayed 547 * Path - Additional path string to be appended. 548 * (NULL if no extra path) 549 * 550 * RETURN: acpi_status 551 * 552 * DESCRIPTION: Display full pathname of an object, DEBUG ONLY 553 * 554 ******************************************************************************/ 555 556 void 557 acpi_ut_display_init_pathname(u8 type, 558 struct acpi_namespace_node *obj_handle, 559 char *path) 560 { 561 acpi_status status; 562 struct acpi_buffer buffer; 563 564 ACPI_FUNCTION_ENTRY(); 565 566 /* Only print the path if the appropriate debug level is enabled */ 567 568 if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) { 569 return; 570 } 571 572 /* Get the full pathname to the node */ 573 574 buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER; 575 status = acpi_ns_handle_to_pathname(obj_handle, &buffer); 576 if (ACPI_FAILURE(status)) { 577 return; 578 } 579 580 /* Print what we're doing */ 581 582 switch (type) { 583 case ACPI_TYPE_METHOD: 584 acpi_os_printf("Executing "); 585 break; 586 587 default: 588 acpi_os_printf("Initializing "); 589 break; 590 } 591 592 /* Print the object type and pathname */ 593 594 acpi_os_printf("%-12s %s", 595 acpi_ut_get_type_name(type), (char *)buffer.pointer); 596 597 /* Extra path is used to append names like _STA, _INI, etc. */ 598 599 if (path) { 600 acpi_os_printf(".%s", path); 601 } 602 acpi_os_printf("\n"); 603 604 ACPI_FREE(buffer.pointer); 605 } 606 #endif 607 608 /******************************************************************************* 609 * 610 * FUNCTION: acpi_ut_valid_acpi_char 611 * 612 * PARAMETERS: Char - The character to be examined 613 * Position - Byte position (0-3) 614 * 615 * RETURN: TRUE if the character is valid, FALSE otherwise 616 * 617 * DESCRIPTION: Check for a valid ACPI character. Must be one of: 618 * 1) Upper case alpha 619 * 2) numeric 620 * 3) underscore 621 * 622 * We allow a '!' as the last character because of the ASF! table 623 * 624 ******************************************************************************/ 625 626 u8 acpi_ut_valid_acpi_char(char character, u32 position) 627 { 628 629 if (!((character >= 'A' && character <= 'Z') || 630 (character >= '0' && character <= '9') || (character == '_'))) { 631 632 /* Allow a '!' in the last position */ 633 634 if (character == '!' && position == 3) { 635 return (TRUE); 636 } 637 638 return (FALSE); 639 } 640 641 return (TRUE); 642 } 643 644 /******************************************************************************* 645 * 646 * FUNCTION: acpi_ut_valid_acpi_name 647 * 648 * PARAMETERS: Name - The name to be examined 649 * 650 * RETURN: TRUE if the name is valid, FALSE otherwise 651 * 652 * DESCRIPTION: Check for a valid ACPI name. Each character must be one of: 653 * 1) Upper case alpha 654 * 2) numeric 655 * 3) underscore 656 * 657 ******************************************************************************/ 658 659 u8 acpi_ut_valid_acpi_name(u32 name) 660 { 661 u32 i; 662 663 ACPI_FUNCTION_ENTRY(); 664 665 for (i = 0; i < ACPI_NAME_SIZE; i++) { 666 if (!acpi_ut_valid_acpi_char 667 ((ACPI_CAST_PTR(char, &name))[i], i)) { 668 return (FALSE); 669 } 670 } 671 672 return (TRUE); 673 } 674 675 /******************************************************************************* 676 * 677 * FUNCTION: acpi_ut_repair_name 678 * 679 * PARAMETERS: Name - The ACPI name to be repaired 680 * 681 * RETURN: Repaired version of the name 682 * 683 * DESCRIPTION: Repair an ACPI name: Change invalid characters to '*' and 684 * return the new name. 685 * 686 ******************************************************************************/ 687 688 acpi_name acpi_ut_repair_name(char *name) 689 { 690 u32 i; 691 char new_name[ACPI_NAME_SIZE]; 692 693 for (i = 0; i < ACPI_NAME_SIZE; i++) { 694 new_name[i] = name[i]; 695 696 /* 697 * Replace a bad character with something printable, yet technically 698 * still invalid. This prevents any collisions with existing "good" 699 * names in the namespace. 700 */ 701 if (!acpi_ut_valid_acpi_char(name[i], i)) { 702 new_name[i] = '*'; 703 } 704 } 705 706 return (*(u32 *) new_name); 707 } 708 709 /******************************************************************************* 710 * 711 * FUNCTION: acpi_ut_strtoul64 712 * 713 * PARAMETERS: String - Null terminated string 714 * Base - Radix of the string: 16 or ACPI_ANY_BASE; 715 * ACPI_ANY_BASE means 'in behalf of to_integer' 716 * ret_integer - Where the converted integer is returned 717 * 718 * RETURN: Status and Converted value 719 * 720 * DESCRIPTION: Convert a string into an unsigned value. Performs either a 721 * 32-bit or 64-bit conversion, depending on the current mode 722 * of the interpreter. 723 * NOTE: Does not support Octal strings, not needed. 724 * 725 ******************************************************************************/ 726 727 acpi_status acpi_ut_strtoul64(char *string, u32 base, u64 * ret_integer) 728 { 729 u32 this_digit = 0; 730 u64 return_value = 0; 731 u64 quotient; 732 u64 dividend; 733 u32 to_integer_op = (base == ACPI_ANY_BASE); 734 u32 mode32 = (acpi_gbl_integer_byte_width == 4); 735 u8 valid_digits = 0; 736 u8 sign_of0x = 0; 737 u8 term = 0; 738 739 ACPI_FUNCTION_TRACE_STR(ut_stroul64, string); 740 741 switch (base) { 742 case ACPI_ANY_BASE: 743 case 16: 744 break; 745 746 default: 747 /* Invalid Base */ 748 return_ACPI_STATUS(AE_BAD_PARAMETER); 749 } 750 751 if (!string) { 752 goto error_exit; 753 } 754 755 /* Skip over any white space in the buffer */ 756 757 while ((*string) && (ACPI_IS_SPACE(*string) || *string == '\t')) { 758 string++; 759 } 760 761 if (to_integer_op) { 762 /* 763 * Base equal to ACPI_ANY_BASE means 'to_integer operation case'. 764 * We need to determine if it is decimal or hexadecimal. 765 */ 766 if ((*string == '0') && (ACPI_TOLOWER(*(string + 1)) == 'x')) { 767 sign_of0x = 1; 768 base = 16; 769 770 /* Skip over the leading '0x' */ 771 string += 2; 772 } else { 773 base = 10; 774 } 775 } 776 777 /* Any string left? Check that '0x' is not followed by white space. */ 778 779 if (!(*string) || ACPI_IS_SPACE(*string) || *string == '\t') { 780 if (to_integer_op) { 781 goto error_exit; 782 } else { 783 goto all_done; 784 } 785 } 786 787 /* 788 * Perform a 32-bit or 64-bit conversion, depending upon the current 789 * execution mode of the interpreter 790 */ 791 dividend = (mode32) ? ACPI_UINT32_MAX : ACPI_UINT64_MAX; 792 793 /* Main loop: convert the string to a 32- or 64-bit integer */ 794 795 while (*string) { 796 if (ACPI_IS_DIGIT(*string)) { 797 798 /* Convert ASCII 0-9 to Decimal value */ 799 800 this_digit = ((u8) * string) - '0'; 801 } else if (base == 10) { 802 803 /* Digit is out of range; possible in to_integer case only */ 804 805 term = 1; 806 } else { 807 this_digit = (u8) ACPI_TOUPPER(*string); 808 if (ACPI_IS_XDIGIT((char)this_digit)) { 809 810 /* Convert ASCII Hex char to value */ 811 812 this_digit = this_digit - 'A' + 10; 813 } else { 814 term = 1; 815 } 816 } 817 818 if (term) { 819 if (to_integer_op) { 820 goto error_exit; 821 } else { 822 break; 823 } 824 } else if ((valid_digits == 0) && (this_digit == 0) 825 && !sign_of0x) { 826 827 /* Skip zeros */ 828 string++; 829 continue; 830 } 831 832 valid_digits++; 833 834 if (sign_of0x && ((valid_digits > 16) 835 || ((valid_digits > 8) && mode32))) { 836 /* 837 * This is to_integer operation case. 838 * No any restrictions for string-to-integer conversion, 839 * see ACPI spec. 840 */ 841 goto error_exit; 842 } 843 844 /* Divide the digit into the correct position */ 845 846 (void)acpi_ut_short_divide((dividend - (u64) this_digit), 847 base, "ient, NULL); 848 849 if (return_value > quotient) { 850 if (to_integer_op) { 851 goto error_exit; 852 } else { 853 break; 854 } 855 } 856 857 return_value *= base; 858 return_value += this_digit; 859 string++; 860 } 861 862 /* All done, normal exit */ 863 864 all_done: 865 866 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n", 867 ACPI_FORMAT_UINT64(return_value))); 868 869 *ret_integer = return_value; 870 return_ACPI_STATUS(AE_OK); 871 872 error_exit: 873 /* Base was set/validated above */ 874 875 if (base == 10) { 876 return_ACPI_STATUS(AE_BAD_DECIMAL_CONSTANT); 877 } else { 878 return_ACPI_STATUS(AE_BAD_HEX_CONSTANT); 879 } 880 } 881 882 /******************************************************************************* 883 * 884 * FUNCTION: acpi_ut_create_update_state_and_push 885 * 886 * PARAMETERS: Object - Object to be added to the new state 887 * Action - Increment/Decrement 888 * state_list - List the state will be added to 889 * 890 * RETURN: Status 891 * 892 * DESCRIPTION: Create a new state and push it 893 * 894 ******************************************************************************/ 895 896 acpi_status 897 acpi_ut_create_update_state_and_push(union acpi_operand_object *object, 898 u16 action, 899 union acpi_generic_state **state_list) 900 { 901 union acpi_generic_state *state; 902 903 ACPI_FUNCTION_ENTRY(); 904 905 /* Ignore null objects; these are expected */ 906 907 if (!object) { 908 return (AE_OK); 909 } 910 911 state = acpi_ut_create_update_state(object, action); 912 if (!state) { 913 return (AE_NO_MEMORY); 914 } 915 916 acpi_ut_push_generic_state(state_list, state); 917 return (AE_OK); 918 } 919 920 /******************************************************************************* 921 * 922 * FUNCTION: acpi_ut_walk_package_tree 923 * 924 * PARAMETERS: source_object - The package to walk 925 * target_object - Target object (if package is being copied) 926 * walk_callback - Called once for each package element 927 * Context - Passed to the callback function 928 * 929 * RETURN: Status 930 * 931 * DESCRIPTION: Walk through a package 932 * 933 ******************************************************************************/ 934 935 acpi_status 936 acpi_ut_walk_package_tree(union acpi_operand_object * source_object, 937 void *target_object, 938 acpi_pkg_callback walk_callback, void *context) 939 { 940 acpi_status status = AE_OK; 941 union acpi_generic_state *state_list = NULL; 942 union acpi_generic_state *state; 943 u32 this_index; 944 union acpi_operand_object *this_source_obj; 945 946 ACPI_FUNCTION_TRACE(ut_walk_package_tree); 947 948 state = acpi_ut_create_pkg_state(source_object, target_object, 0); 949 if (!state) { 950 return_ACPI_STATUS(AE_NO_MEMORY); 951 } 952 953 while (state) { 954 955 /* Get one element of the package */ 956 957 this_index = state->pkg.index; 958 this_source_obj = (union acpi_operand_object *) 959 state->pkg.source_object->package.elements[this_index]; 960 961 /* 962 * Check for: 963 * 1) An uninitialized package element. It is completely 964 * legal to declare a package and leave it uninitialized 965 * 2) Not an internal object - can be a namespace node instead 966 * 3) Any type other than a package. Packages are handled in else 967 * case below. 968 */ 969 if ((!this_source_obj) || 970 (ACPI_GET_DESCRIPTOR_TYPE(this_source_obj) != 971 ACPI_DESC_TYPE_OPERAND) 972 || (this_source_obj->common.type != ACPI_TYPE_PACKAGE)) { 973 status = 974 walk_callback(ACPI_COPY_TYPE_SIMPLE, 975 this_source_obj, state, context); 976 if (ACPI_FAILURE(status)) { 977 return_ACPI_STATUS(status); 978 } 979 980 state->pkg.index++; 981 while (state->pkg.index >= 982 state->pkg.source_object->package.count) { 983 /* 984 * We've handled all of the objects at this level, This means 985 * that we have just completed a package. That package may 986 * have contained one or more packages itself. 987 * 988 * Delete this state and pop the previous state (package). 989 */ 990 acpi_ut_delete_generic_state(state); 991 state = acpi_ut_pop_generic_state(&state_list); 992 993 /* Finished when there are no more states */ 994 995 if (!state) { 996 /* 997 * We have handled all of the objects in the top level 998 * package just add the length of the package objects 999 * and exit 1000 */ 1001 return_ACPI_STATUS(AE_OK); 1002 } 1003 1004 /* 1005 * Go back up a level and move the index past the just 1006 * completed package object. 1007 */ 1008 state->pkg.index++; 1009 } 1010 } else { 1011 /* This is a subobject of type package */ 1012 1013 status = 1014 walk_callback(ACPI_COPY_TYPE_PACKAGE, 1015 this_source_obj, state, context); 1016 if (ACPI_FAILURE(status)) { 1017 return_ACPI_STATUS(status); 1018 } 1019 1020 /* 1021 * Push the current state and create a new one 1022 * The callback above returned a new target package object. 1023 */ 1024 acpi_ut_push_generic_state(&state_list, state); 1025 state = acpi_ut_create_pkg_state(this_source_obj, 1026 state->pkg. 1027 this_target_obj, 0); 1028 if (!state) { 1029 1030 /* Free any stacked Update State objects */ 1031 1032 while (state_list) { 1033 state = 1034 acpi_ut_pop_generic_state 1035 (&state_list); 1036 acpi_ut_delete_generic_state(state); 1037 } 1038 return_ACPI_STATUS(AE_NO_MEMORY); 1039 } 1040 } 1041 } 1042 1043 /* We should never get here */ 1044 1045 return_ACPI_STATUS(AE_AML_INTERNAL); 1046 } 1047 1048 /******************************************************************************* 1049 * 1050 * FUNCTION: acpi_error, acpi_exception, acpi_warning, acpi_info 1051 * 1052 * PARAMETERS: module_name - Caller's module name (for error output) 1053 * line_number - Caller's line number (for error output) 1054 * Format - Printf format string + additional args 1055 * 1056 * RETURN: None 1057 * 1058 * DESCRIPTION: Print message with module/line/version info 1059 * 1060 ******************************************************************************/ 1061 1062 void ACPI_INTERNAL_VAR_XFACE 1063 acpi_error(const char *module_name, u32 line_number, const char *format, ...) 1064 { 1065 va_list args; 1066 1067 acpi_os_printf("ACPI Error: "); 1068 1069 va_start(args, format); 1070 acpi_os_vprintf(format, args); 1071 ACPI_COMMON_MSG_SUFFIX; 1072 va_end(args); 1073 } 1074 1075 void ACPI_INTERNAL_VAR_XFACE 1076 acpi_exception(const char *module_name, 1077 u32 line_number, acpi_status status, const char *format, ...) 1078 { 1079 va_list args; 1080 1081 acpi_os_printf("ACPI Exception: %s, ", acpi_format_exception(status)); 1082 1083 va_start(args, format); 1084 acpi_os_vprintf(format, args); 1085 ACPI_COMMON_MSG_SUFFIX; 1086 va_end(args); 1087 } 1088 1089 void ACPI_INTERNAL_VAR_XFACE 1090 acpi_warning(const char *module_name, u32 line_number, const char *format, ...) 1091 { 1092 va_list args; 1093 1094 acpi_os_printf("ACPI Warning: "); 1095 1096 va_start(args, format); 1097 acpi_os_vprintf(format, args); 1098 ACPI_COMMON_MSG_SUFFIX; 1099 va_end(args); 1100 } 1101 1102 void ACPI_INTERNAL_VAR_XFACE 1103 acpi_info(const char *module_name, u32 line_number, const char *format, ...) 1104 { 1105 va_list args; 1106 1107 acpi_os_printf("ACPI: "); 1108 1109 va_start(args, format); 1110 acpi_os_vprintf(format, args); 1111 acpi_os_printf("\n"); 1112 va_end(args); 1113 } 1114 1115 ACPI_EXPORT_SYMBOL(acpi_error) 1116 ACPI_EXPORT_SYMBOL(acpi_exception) 1117 ACPI_EXPORT_SYMBOL(acpi_warning) 1118 ACPI_EXPORT_SYMBOL(acpi_info) 1119 1120 /******************************************************************************* 1121 * 1122 * FUNCTION: acpi_ut_predefined_warning 1123 * 1124 * PARAMETERS: module_name - Caller's module name (for error output) 1125 * line_number - Caller's line number (for error output) 1126 * Pathname - Full pathname to the node 1127 * node_flags - From Namespace node for the method/object 1128 * Format - Printf format string + additional args 1129 * 1130 * RETURN: None 1131 * 1132 * DESCRIPTION: Warnings for the predefined validation module. Messages are 1133 * only emitted the first time a problem with a particular 1134 * method/object is detected. This prevents a flood of error 1135 * messages for methods that are repeatedly evaluated. 1136 * 1137 ******************************************************************************/ 1138 1139 void ACPI_INTERNAL_VAR_XFACE 1140 acpi_ut_predefined_warning(const char *module_name, 1141 u32 line_number, 1142 char *pathname, 1143 u8 node_flags, const char *format, ...) 1144 { 1145 va_list args; 1146 1147 /* 1148 * Warning messages for this method/object will be disabled after the 1149 * first time a validation fails or an object is successfully repaired. 1150 */ 1151 if (node_flags & ANOBJ_EVALUATED) { 1152 return; 1153 } 1154 1155 acpi_os_printf("ACPI Warning for %s: ", pathname); 1156 1157 va_start(args, format); 1158 acpi_os_vprintf(format, args); 1159 ACPI_COMMON_MSG_SUFFIX; 1160 va_end(args); 1161 } 1162 1163 /******************************************************************************* 1164 * 1165 * FUNCTION: acpi_ut_predefined_info 1166 * 1167 * PARAMETERS: module_name - Caller's module name (for error output) 1168 * line_number - Caller's line number (for error output) 1169 * Pathname - Full pathname to the node 1170 * node_flags - From Namespace node for the method/object 1171 * Format - Printf format string + additional args 1172 * 1173 * RETURN: None 1174 * 1175 * DESCRIPTION: Info messages for the predefined validation module. Messages 1176 * are only emitted the first time a problem with a particular 1177 * method/object is detected. This prevents a flood of 1178 * messages for methods that are repeatedly evaluated. 1179 * 1180 ******************************************************************************/ 1181 1182 void ACPI_INTERNAL_VAR_XFACE 1183 acpi_ut_predefined_info(const char *module_name, 1184 u32 line_number, 1185 char *pathname, u8 node_flags, const char *format, ...) 1186 { 1187 va_list args; 1188 1189 /* 1190 * Warning messages for this method/object will be disabled after the 1191 * first time a validation fails or an object is successfully repaired. 1192 */ 1193 if (node_flags & ANOBJ_EVALUATED) { 1194 return; 1195 } 1196 1197 acpi_os_printf("ACPI Info for %s: ", pathname); 1198 1199 va_start(args, format); 1200 acpi_os_vprintf(format, args); 1201 ACPI_COMMON_MSG_SUFFIX; 1202 va_end(args); 1203 } 1204