1 /******************************************************************************* 2 * 3 * Module Name: utmisc - common utility procedures 4 * 5 ******************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2012, 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_pci_root_bridge 124 * 125 * PARAMETERS: Id - The HID/CID in string format 126 * 127 * RETURN: TRUE if the Id is a match for a PCI/PCI-Express Root Bridge 128 * 129 * DESCRIPTION: Determine if the input ID is a PCI Root Bridge ID. 130 * 131 ******************************************************************************/ 132 133 u8 acpi_ut_is_pci_root_bridge(char *id) 134 { 135 136 /* 137 * Check if this is a PCI root bridge. 138 * ACPI 3.0+: check for a PCI Express root also. 139 */ 140 if (!(ACPI_STRCMP(id, 141 PCI_ROOT_HID_STRING)) || 142 !(ACPI_STRCMP(id, PCI_EXPRESS_ROOT_HID_STRING))) { 143 return (TRUE); 144 } 145 146 return (FALSE); 147 } 148 149 /******************************************************************************* 150 * 151 * FUNCTION: acpi_ut_is_aml_table 152 * 153 * PARAMETERS: Table - An ACPI table 154 * 155 * RETURN: TRUE if table contains executable AML; FALSE otherwise 156 * 157 * DESCRIPTION: Check ACPI Signature for a table that contains AML code. 158 * Currently, these are DSDT,SSDT,PSDT. All other table types are 159 * data tables that do not contain AML code. 160 * 161 ******************************************************************************/ 162 163 u8 acpi_ut_is_aml_table(struct acpi_table_header *table) 164 { 165 166 /* These are the only tables that contain executable AML */ 167 168 if (ACPI_COMPARE_NAME(table->signature, ACPI_SIG_DSDT) || 169 ACPI_COMPARE_NAME(table->signature, ACPI_SIG_PSDT) || 170 ACPI_COMPARE_NAME(table->signature, ACPI_SIG_SSDT)) { 171 return (TRUE); 172 } 173 174 return (FALSE); 175 } 176 177 /******************************************************************************* 178 * 179 * FUNCTION: acpi_ut_allocate_owner_id 180 * 181 * PARAMETERS: owner_id - Where the new owner ID is returned 182 * 183 * RETURN: Status 184 * 185 * DESCRIPTION: Allocate a table or method owner ID. The owner ID is used to 186 * track objects created by the table or method, to be deleted 187 * when the method exits or the table is unloaded. 188 * 189 ******************************************************************************/ 190 191 acpi_status acpi_ut_allocate_owner_id(acpi_owner_id * owner_id) 192 { 193 u32 i; 194 u32 j; 195 u32 k; 196 acpi_status status; 197 198 ACPI_FUNCTION_TRACE(ut_allocate_owner_id); 199 200 /* Guard against multiple allocations of ID to the same location */ 201 202 if (*owner_id) { 203 ACPI_ERROR((AE_INFO, "Owner ID [0x%2.2X] already exists", 204 *owner_id)); 205 return_ACPI_STATUS(AE_ALREADY_EXISTS); 206 } 207 208 /* Mutex for the global ID mask */ 209 210 status = acpi_ut_acquire_mutex(ACPI_MTX_CACHES); 211 if (ACPI_FAILURE(status)) { 212 return_ACPI_STATUS(status); 213 } 214 215 /* 216 * Find a free owner ID, cycle through all possible IDs on repeated 217 * allocations. (ACPI_NUM_OWNERID_MASKS + 1) because first index may have 218 * to be scanned twice. 219 */ 220 for (i = 0, j = acpi_gbl_last_owner_id_index; 221 i < (ACPI_NUM_OWNERID_MASKS + 1); i++, j++) { 222 if (j >= ACPI_NUM_OWNERID_MASKS) { 223 j = 0; /* Wraparound to start of mask array */ 224 } 225 226 for (k = acpi_gbl_next_owner_id_offset; k < 32; k++) { 227 if (acpi_gbl_owner_id_mask[j] == ACPI_UINT32_MAX) { 228 229 /* There are no free IDs in this mask */ 230 231 break; 232 } 233 234 if (!(acpi_gbl_owner_id_mask[j] & (1 << k))) { 235 /* 236 * Found a free ID. The actual ID is the bit index plus one, 237 * making zero an invalid Owner ID. Save this as the last ID 238 * allocated and update the global ID mask. 239 */ 240 acpi_gbl_owner_id_mask[j] |= (1 << k); 241 242 acpi_gbl_last_owner_id_index = (u8) j; 243 acpi_gbl_next_owner_id_offset = (u8) (k + 1); 244 245 /* 246 * Construct encoded ID from the index and bit position 247 * 248 * Note: Last [j].k (bit 255) is never used and is marked 249 * permanently allocated (prevents +1 overflow) 250 */ 251 *owner_id = 252 (acpi_owner_id) ((k + 1) + ACPI_MUL_32(j)); 253 254 ACPI_DEBUG_PRINT((ACPI_DB_VALUES, 255 "Allocated OwnerId: %2.2X\n", 256 (unsigned int)*owner_id)); 257 goto exit; 258 } 259 } 260 261 acpi_gbl_next_owner_id_offset = 0; 262 } 263 264 /* 265 * All owner_ids have been allocated. This typically should 266 * not happen since the IDs are reused after deallocation. The IDs are 267 * allocated upon table load (one per table) and method execution, and 268 * they are released when a table is unloaded or a method completes 269 * execution. 270 * 271 * If this error happens, there may be very deep nesting of invoked control 272 * methods, or there may be a bug where the IDs are not released. 273 */ 274 status = AE_OWNER_ID_LIMIT; 275 ACPI_ERROR((AE_INFO, 276 "Could not allocate new OwnerId (255 max), AE_OWNER_ID_LIMIT")); 277 278 exit: 279 (void)acpi_ut_release_mutex(ACPI_MTX_CACHES); 280 return_ACPI_STATUS(status); 281 } 282 283 /******************************************************************************* 284 * 285 * FUNCTION: acpi_ut_release_owner_id 286 * 287 * PARAMETERS: owner_id_ptr - Pointer to a previously allocated owner_iD 288 * 289 * RETURN: None. No error is returned because we are either exiting a 290 * control method or unloading a table. Either way, we would 291 * ignore any error anyway. 292 * 293 * DESCRIPTION: Release a table or method owner ID. Valid IDs are 1 - 255 294 * 295 ******************************************************************************/ 296 297 void acpi_ut_release_owner_id(acpi_owner_id * owner_id_ptr) 298 { 299 acpi_owner_id owner_id = *owner_id_ptr; 300 acpi_status status; 301 u32 index; 302 u32 bit; 303 304 ACPI_FUNCTION_TRACE_U32(ut_release_owner_id, owner_id); 305 306 /* Always clear the input owner_id (zero is an invalid ID) */ 307 308 *owner_id_ptr = 0; 309 310 /* Zero is not a valid owner_iD */ 311 312 if (owner_id == 0) { 313 ACPI_ERROR((AE_INFO, "Invalid OwnerId: 0x%2.2X", owner_id)); 314 return_VOID; 315 } 316 317 /* Mutex for the global ID mask */ 318 319 status = acpi_ut_acquire_mutex(ACPI_MTX_CACHES); 320 if (ACPI_FAILURE(status)) { 321 return_VOID; 322 } 323 324 /* Normalize the ID to zero */ 325 326 owner_id--; 327 328 /* Decode ID to index/offset pair */ 329 330 index = ACPI_DIV_32(owner_id); 331 bit = 1 << ACPI_MOD_32(owner_id); 332 333 /* Free the owner ID only if it is valid */ 334 335 if (acpi_gbl_owner_id_mask[index] & bit) { 336 acpi_gbl_owner_id_mask[index] ^= bit; 337 } else { 338 ACPI_ERROR((AE_INFO, 339 "Release of non-allocated OwnerId: 0x%2.2X", 340 owner_id + 1)); 341 } 342 343 (void)acpi_ut_release_mutex(ACPI_MTX_CACHES); 344 return_VOID; 345 } 346 347 /******************************************************************************* 348 * 349 * FUNCTION: acpi_ut_strupr (strupr) 350 * 351 * PARAMETERS: src_string - The source string to convert 352 * 353 * RETURN: None 354 * 355 * DESCRIPTION: Convert string to uppercase 356 * 357 * NOTE: This is not a POSIX function, so it appears here, not in utclib.c 358 * 359 ******************************************************************************/ 360 361 void acpi_ut_strupr(char *src_string) 362 { 363 char *string; 364 365 ACPI_FUNCTION_ENTRY(); 366 367 if (!src_string) { 368 return; 369 } 370 371 /* Walk entire string, uppercasing the letters */ 372 373 for (string = src_string; *string; string++) { 374 *string = (char)ACPI_TOUPPER(*string); 375 } 376 377 return; 378 } 379 380 /******************************************************************************* 381 * 382 * FUNCTION: acpi_ut_print_string 383 * 384 * PARAMETERS: String - Null terminated ASCII string 385 * max_length - Maximum output length 386 * 387 * RETURN: None 388 * 389 * DESCRIPTION: Dump an ASCII string with support for ACPI-defined escape 390 * sequences. 391 * 392 ******************************************************************************/ 393 394 void acpi_ut_print_string(char *string, u8 max_length) 395 { 396 u32 i; 397 398 if (!string) { 399 acpi_os_printf("<\"NULL STRING PTR\">"); 400 return; 401 } 402 403 acpi_os_printf("\""); 404 for (i = 0; string[i] && (i < max_length); i++) { 405 406 /* Escape sequences */ 407 408 switch (string[i]) { 409 case 0x07: 410 acpi_os_printf("\\a"); /* BELL */ 411 break; 412 413 case 0x08: 414 acpi_os_printf("\\b"); /* BACKSPACE */ 415 break; 416 417 case 0x0C: 418 acpi_os_printf("\\f"); /* FORMFEED */ 419 break; 420 421 case 0x0A: 422 acpi_os_printf("\\n"); /* LINEFEED */ 423 break; 424 425 case 0x0D: 426 acpi_os_printf("\\r"); /* CARRIAGE RETURN */ 427 break; 428 429 case 0x09: 430 acpi_os_printf("\\t"); /* HORIZONTAL TAB */ 431 break; 432 433 case 0x0B: 434 acpi_os_printf("\\v"); /* VERTICAL TAB */ 435 break; 436 437 case '\'': /* Single Quote */ 438 case '\"': /* Double Quote */ 439 case '\\': /* Backslash */ 440 acpi_os_printf("\\%c", (int)string[i]); 441 break; 442 443 default: 444 445 /* Check for printable character or hex escape */ 446 447 if (ACPI_IS_PRINT(string[i])) { 448 /* This is a normal character */ 449 450 acpi_os_printf("%c", (int)string[i]); 451 } else { 452 /* All others will be Hex escapes */ 453 454 acpi_os_printf("\\x%2.2X", (s32) string[i]); 455 } 456 break; 457 } 458 } 459 acpi_os_printf("\""); 460 461 if (i == max_length && string[i]) { 462 acpi_os_printf("..."); 463 } 464 } 465 466 /******************************************************************************* 467 * 468 * FUNCTION: acpi_ut_dword_byte_swap 469 * 470 * PARAMETERS: Value - Value to be converted 471 * 472 * RETURN: u32 integer with bytes swapped 473 * 474 * DESCRIPTION: Convert a 32-bit value to big-endian (swap the bytes) 475 * 476 ******************************************************************************/ 477 478 u32 acpi_ut_dword_byte_swap(u32 value) 479 { 480 union { 481 u32 value; 482 u8 bytes[4]; 483 } out; 484 union { 485 u32 value; 486 u8 bytes[4]; 487 } in; 488 489 ACPI_FUNCTION_ENTRY(); 490 491 in.value = value; 492 493 out.bytes[0] = in.bytes[3]; 494 out.bytes[1] = in.bytes[2]; 495 out.bytes[2] = in.bytes[1]; 496 out.bytes[3] = in.bytes[0]; 497 498 return (out.value); 499 } 500 501 /******************************************************************************* 502 * 503 * FUNCTION: acpi_ut_set_integer_width 504 * 505 * PARAMETERS: Revision From DSDT header 506 * 507 * RETURN: None 508 * 509 * DESCRIPTION: Set the global integer bit width based upon the revision 510 * of the DSDT. For Revision 1 and 0, Integers are 32 bits. 511 * For Revision 2 and above, Integers are 64 bits. Yes, this 512 * makes a difference. 513 * 514 ******************************************************************************/ 515 516 void acpi_ut_set_integer_width(u8 revision) 517 { 518 519 if (revision < 2) { 520 521 /* 32-bit case */ 522 523 acpi_gbl_integer_bit_width = 32; 524 acpi_gbl_integer_nybble_width = 8; 525 acpi_gbl_integer_byte_width = 4; 526 } else { 527 /* 64-bit case (ACPI 2.0+) */ 528 529 acpi_gbl_integer_bit_width = 64; 530 acpi_gbl_integer_nybble_width = 16; 531 acpi_gbl_integer_byte_width = 8; 532 } 533 } 534 535 #ifdef ACPI_DEBUG_OUTPUT 536 /******************************************************************************* 537 * 538 * FUNCTION: acpi_ut_display_init_pathname 539 * 540 * PARAMETERS: Type - Object type of the node 541 * obj_handle - Handle whose pathname will be displayed 542 * Path - Additional path string to be appended. 543 * (NULL if no extra path) 544 * 545 * RETURN: acpi_status 546 * 547 * DESCRIPTION: Display full pathname of an object, DEBUG ONLY 548 * 549 ******************************************************************************/ 550 551 void 552 acpi_ut_display_init_pathname(u8 type, 553 struct acpi_namespace_node *obj_handle, 554 char *path) 555 { 556 acpi_status status; 557 struct acpi_buffer buffer; 558 559 ACPI_FUNCTION_ENTRY(); 560 561 /* Only print the path if the appropriate debug level is enabled */ 562 563 if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) { 564 return; 565 } 566 567 /* Get the full pathname to the node */ 568 569 buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER; 570 status = acpi_ns_handle_to_pathname(obj_handle, &buffer); 571 if (ACPI_FAILURE(status)) { 572 return; 573 } 574 575 /* Print what we're doing */ 576 577 switch (type) { 578 case ACPI_TYPE_METHOD: 579 acpi_os_printf("Executing "); 580 break; 581 582 default: 583 acpi_os_printf("Initializing "); 584 break; 585 } 586 587 /* Print the object type and pathname */ 588 589 acpi_os_printf("%-12s %s", 590 acpi_ut_get_type_name(type), (char *)buffer.pointer); 591 592 /* Extra path is used to append names like _STA, _INI, etc. */ 593 594 if (path) { 595 acpi_os_printf(".%s", path); 596 } 597 acpi_os_printf("\n"); 598 599 ACPI_FREE(buffer.pointer); 600 } 601 #endif 602 603 /******************************************************************************* 604 * 605 * FUNCTION: acpi_ut_valid_acpi_char 606 * 607 * PARAMETERS: Char - The character to be examined 608 * Position - Byte position (0-3) 609 * 610 * RETURN: TRUE if the character is valid, FALSE otherwise 611 * 612 * DESCRIPTION: Check for a valid ACPI character. Must be one of: 613 * 1) Upper case alpha 614 * 2) numeric 615 * 3) underscore 616 * 617 * We allow a '!' as the last character because of the ASF! table 618 * 619 ******************************************************************************/ 620 621 u8 acpi_ut_valid_acpi_char(char character, u32 position) 622 { 623 624 if (!((character >= 'A' && character <= 'Z') || 625 (character >= '0' && character <= '9') || (character == '_'))) { 626 627 /* Allow a '!' in the last position */ 628 629 if (character == '!' && position == 3) { 630 return (TRUE); 631 } 632 633 return (FALSE); 634 } 635 636 return (TRUE); 637 } 638 639 /******************************************************************************* 640 * 641 * FUNCTION: acpi_ut_valid_acpi_name 642 * 643 * PARAMETERS: Name - The name to be examined 644 * 645 * RETURN: TRUE if the name is valid, FALSE otherwise 646 * 647 * DESCRIPTION: Check for a valid ACPI name. Each character must be one of: 648 * 1) Upper case alpha 649 * 2) numeric 650 * 3) underscore 651 * 652 ******************************************************************************/ 653 654 u8 acpi_ut_valid_acpi_name(u32 name) 655 { 656 u32 i; 657 658 ACPI_FUNCTION_ENTRY(); 659 660 for (i = 0; i < ACPI_NAME_SIZE; i++) { 661 if (!acpi_ut_valid_acpi_char 662 ((ACPI_CAST_PTR(char, &name))[i], i)) { 663 return (FALSE); 664 } 665 } 666 667 return (TRUE); 668 } 669 670 /******************************************************************************* 671 * 672 * FUNCTION: acpi_ut_repair_name 673 * 674 * PARAMETERS: Name - The ACPI name to be repaired 675 * 676 * RETURN: Repaired version of the name 677 * 678 * DESCRIPTION: Repair an ACPI name: Change invalid characters to '*' and 679 * return the new name. 680 * 681 ******************************************************************************/ 682 683 acpi_name acpi_ut_repair_name(char *name) 684 { 685 u32 i; 686 char new_name[ACPI_NAME_SIZE]; 687 688 for (i = 0; i < ACPI_NAME_SIZE; i++) { 689 new_name[i] = name[i]; 690 691 /* 692 * Replace a bad character with something printable, yet technically 693 * still invalid. This prevents any collisions with existing "good" 694 * names in the namespace. 695 */ 696 if (!acpi_ut_valid_acpi_char(name[i], i)) { 697 new_name[i] = '*'; 698 } 699 } 700 701 return (*(u32 *) new_name); 702 } 703 704 /******************************************************************************* 705 * 706 * FUNCTION: acpi_ut_strtoul64 707 * 708 * PARAMETERS: String - Null terminated string 709 * Base - Radix of the string: 16 or ACPI_ANY_BASE; 710 * ACPI_ANY_BASE means 'in behalf of to_integer' 711 * ret_integer - Where the converted integer is returned 712 * 713 * RETURN: Status and Converted value 714 * 715 * DESCRIPTION: Convert a string into an unsigned value. Performs either a 716 * 32-bit or 64-bit conversion, depending on the current mode 717 * of the interpreter. 718 * NOTE: Does not support Octal strings, not needed. 719 * 720 ******************************************************************************/ 721 722 acpi_status acpi_ut_strtoul64(char *string, u32 base, u64 * ret_integer) 723 { 724 u32 this_digit = 0; 725 u64 return_value = 0; 726 u64 quotient; 727 u64 dividend; 728 u32 to_integer_op = (base == ACPI_ANY_BASE); 729 u32 mode32 = (acpi_gbl_integer_byte_width == 4); 730 u8 valid_digits = 0; 731 u8 sign_of0x = 0; 732 u8 term = 0; 733 734 ACPI_FUNCTION_TRACE_STR(ut_stroul64, string); 735 736 switch (base) { 737 case ACPI_ANY_BASE: 738 case 16: 739 break; 740 741 default: 742 /* Invalid Base */ 743 return_ACPI_STATUS(AE_BAD_PARAMETER); 744 } 745 746 if (!string) { 747 goto error_exit; 748 } 749 750 /* Skip over any white space in the buffer */ 751 752 while ((*string) && (ACPI_IS_SPACE(*string) || *string == '\t')) { 753 string++; 754 } 755 756 if (to_integer_op) { 757 /* 758 * Base equal to ACPI_ANY_BASE means 'to_integer operation case'. 759 * We need to determine if it is decimal or hexadecimal. 760 */ 761 if ((*string == '0') && (ACPI_TOLOWER(*(string + 1)) == 'x')) { 762 sign_of0x = 1; 763 base = 16; 764 765 /* Skip over the leading '0x' */ 766 string += 2; 767 } else { 768 base = 10; 769 } 770 } 771 772 /* Any string left? Check that '0x' is not followed by white space. */ 773 774 if (!(*string) || ACPI_IS_SPACE(*string) || *string == '\t') { 775 if (to_integer_op) { 776 goto error_exit; 777 } else { 778 goto all_done; 779 } 780 } 781 782 /* 783 * Perform a 32-bit or 64-bit conversion, depending upon the current 784 * execution mode of the interpreter 785 */ 786 dividend = (mode32) ? ACPI_UINT32_MAX : ACPI_UINT64_MAX; 787 788 /* Main loop: convert the string to a 32- or 64-bit integer */ 789 790 while (*string) { 791 if (ACPI_IS_DIGIT(*string)) { 792 793 /* Convert ASCII 0-9 to Decimal value */ 794 795 this_digit = ((u8) * string) - '0'; 796 } else if (base == 10) { 797 798 /* Digit is out of range; possible in to_integer case only */ 799 800 term = 1; 801 } else { 802 this_digit = (u8) ACPI_TOUPPER(*string); 803 if (ACPI_IS_XDIGIT((char)this_digit)) { 804 805 /* Convert ASCII Hex char to value */ 806 807 this_digit = this_digit - 'A' + 10; 808 } else { 809 term = 1; 810 } 811 } 812 813 if (term) { 814 if (to_integer_op) { 815 goto error_exit; 816 } else { 817 break; 818 } 819 } else if ((valid_digits == 0) && (this_digit == 0) 820 && !sign_of0x) { 821 822 /* Skip zeros */ 823 string++; 824 continue; 825 } 826 827 valid_digits++; 828 829 if (sign_of0x && ((valid_digits > 16) 830 || ((valid_digits > 8) && mode32))) { 831 /* 832 * This is to_integer operation case. 833 * No any restrictions for string-to-integer conversion, 834 * see ACPI spec. 835 */ 836 goto error_exit; 837 } 838 839 /* Divide the digit into the correct position */ 840 841 (void)acpi_ut_short_divide((dividend - (u64) this_digit), 842 base, "ient, NULL); 843 844 if (return_value > quotient) { 845 if (to_integer_op) { 846 goto error_exit; 847 } else { 848 break; 849 } 850 } 851 852 return_value *= base; 853 return_value += this_digit; 854 string++; 855 } 856 857 /* All done, normal exit */ 858 859 all_done: 860 861 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n", 862 ACPI_FORMAT_UINT64(return_value))); 863 864 *ret_integer = return_value; 865 return_ACPI_STATUS(AE_OK); 866 867 error_exit: 868 /* Base was set/validated above */ 869 870 if (base == 10) { 871 return_ACPI_STATUS(AE_BAD_DECIMAL_CONSTANT); 872 } else { 873 return_ACPI_STATUS(AE_BAD_HEX_CONSTANT); 874 } 875 } 876 877 /******************************************************************************* 878 * 879 * FUNCTION: acpi_ut_create_update_state_and_push 880 * 881 * PARAMETERS: Object - Object to be added to the new state 882 * Action - Increment/Decrement 883 * state_list - List the state will be added to 884 * 885 * RETURN: Status 886 * 887 * DESCRIPTION: Create a new state and push it 888 * 889 ******************************************************************************/ 890 891 acpi_status 892 acpi_ut_create_update_state_and_push(union acpi_operand_object *object, 893 u16 action, 894 union acpi_generic_state **state_list) 895 { 896 union acpi_generic_state *state; 897 898 ACPI_FUNCTION_ENTRY(); 899 900 /* Ignore null objects; these are expected */ 901 902 if (!object) { 903 return (AE_OK); 904 } 905 906 state = acpi_ut_create_update_state(object, action); 907 if (!state) { 908 return (AE_NO_MEMORY); 909 } 910 911 acpi_ut_push_generic_state(state_list, state); 912 return (AE_OK); 913 } 914 915 /******************************************************************************* 916 * 917 * FUNCTION: acpi_ut_walk_package_tree 918 * 919 * PARAMETERS: source_object - The package to walk 920 * target_object - Target object (if package is being copied) 921 * walk_callback - Called once for each package element 922 * Context - Passed to the callback function 923 * 924 * RETURN: Status 925 * 926 * DESCRIPTION: Walk through a package 927 * 928 ******************************************************************************/ 929 930 acpi_status 931 acpi_ut_walk_package_tree(union acpi_operand_object * source_object, 932 void *target_object, 933 acpi_pkg_callback walk_callback, void *context) 934 { 935 acpi_status status = AE_OK; 936 union acpi_generic_state *state_list = NULL; 937 union acpi_generic_state *state; 938 u32 this_index; 939 union acpi_operand_object *this_source_obj; 940 941 ACPI_FUNCTION_TRACE(ut_walk_package_tree); 942 943 state = acpi_ut_create_pkg_state(source_object, target_object, 0); 944 if (!state) { 945 return_ACPI_STATUS(AE_NO_MEMORY); 946 } 947 948 while (state) { 949 950 /* Get one element of the package */ 951 952 this_index = state->pkg.index; 953 this_source_obj = (union acpi_operand_object *) 954 state->pkg.source_object->package.elements[this_index]; 955 956 /* 957 * Check for: 958 * 1) An uninitialized package element. It is completely 959 * legal to declare a package and leave it uninitialized 960 * 2) Not an internal object - can be a namespace node instead 961 * 3) Any type other than a package. Packages are handled in else 962 * case below. 963 */ 964 if ((!this_source_obj) || 965 (ACPI_GET_DESCRIPTOR_TYPE(this_source_obj) != 966 ACPI_DESC_TYPE_OPERAND) 967 || (this_source_obj->common.type != ACPI_TYPE_PACKAGE)) { 968 status = 969 walk_callback(ACPI_COPY_TYPE_SIMPLE, 970 this_source_obj, state, context); 971 if (ACPI_FAILURE(status)) { 972 return_ACPI_STATUS(status); 973 } 974 975 state->pkg.index++; 976 while (state->pkg.index >= 977 state->pkg.source_object->package.count) { 978 /* 979 * We've handled all of the objects at this level, This means 980 * that we have just completed a package. That package may 981 * have contained one or more packages itself. 982 * 983 * Delete this state and pop the previous state (package). 984 */ 985 acpi_ut_delete_generic_state(state); 986 state = acpi_ut_pop_generic_state(&state_list); 987 988 /* Finished when there are no more states */ 989 990 if (!state) { 991 /* 992 * We have handled all of the objects in the top level 993 * package just add the length of the package objects 994 * and exit 995 */ 996 return_ACPI_STATUS(AE_OK); 997 } 998 999 /* 1000 * Go back up a level and move the index past the just 1001 * completed package object. 1002 */ 1003 state->pkg.index++; 1004 } 1005 } else { 1006 /* This is a subobject of type package */ 1007 1008 status = 1009 walk_callback(ACPI_COPY_TYPE_PACKAGE, 1010 this_source_obj, state, context); 1011 if (ACPI_FAILURE(status)) { 1012 return_ACPI_STATUS(status); 1013 } 1014 1015 /* 1016 * Push the current state and create a new one 1017 * The callback above returned a new target package object. 1018 */ 1019 acpi_ut_push_generic_state(&state_list, state); 1020 state = acpi_ut_create_pkg_state(this_source_obj, 1021 state->pkg. 1022 this_target_obj, 0); 1023 if (!state) { 1024 1025 /* Free any stacked Update State objects */ 1026 1027 while (state_list) { 1028 state = 1029 acpi_ut_pop_generic_state 1030 (&state_list); 1031 acpi_ut_delete_generic_state(state); 1032 } 1033 return_ACPI_STATUS(AE_NO_MEMORY); 1034 } 1035 } 1036 } 1037 1038 /* We should never get here */ 1039 1040 return_ACPI_STATUS(AE_AML_INTERNAL); 1041 } 1042