1 /****************************************************************************** 2 * 3 * Module Name: dtutils.c - Utility routines for the data table compiler 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2018, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 ***************************************************************************** 115 * 116 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152 #include "aslcompiler.h" 153 #include "actables.h" 154 155 #define _COMPONENT DT_COMPILER 156 ACPI_MODULE_NAME ("dtutils") 157 158 /* Local prototypes */ 159 160 static void 161 DtSum ( 162 DT_SUBTABLE *Subtable, 163 void *Context, 164 void *ReturnValue); 165 166 167 /****************************************************************************** 168 * 169 * FUNCTION: DtError 170 * 171 * PARAMETERS: Level - Seriousness (Warning/error, etc.) 172 * MessageId - Index into global message buffer 173 * Op - Parse node where error happened 174 * ExtraMessage - additional error message 175 * 176 * RETURN: None 177 * 178 * DESCRIPTION: Common error interface for data table compiler 179 * 180 *****************************************************************************/ 181 182 void 183 DtError ( 184 UINT8 Level, 185 UINT16 MessageId, 186 DT_FIELD *FieldObject, 187 char *ExtraMessage) 188 { 189 190 /* Check if user wants to ignore this exception */ 191 192 if (AslIsExceptionIgnored (Level, MessageId)) 193 { 194 return; 195 } 196 197 if (FieldObject) 198 { 199 AslCommonError (Level, MessageId, 200 FieldObject->Line, 201 FieldObject->Line, 202 FieldObject->ByteOffset, 203 FieldObject->Column, 204 Gbl_Files[ASL_FILE_INPUT].Filename, ExtraMessage); 205 } 206 else 207 { 208 AslCommonError (Level, MessageId, 0, 209 0, 0, 0, 0, ExtraMessage); 210 } 211 } 212 213 214 /****************************************************************************** 215 * 216 * FUNCTION: DtNameError 217 * 218 * PARAMETERS: Level - Seriousness (Warning/error, etc.) 219 * MessageId - Index into global message buffer 220 * Op - Parse node where error happened 221 * ExtraMessage - additional error message 222 * 223 * RETURN: None 224 * 225 * DESCRIPTION: Error interface for named objects 226 * 227 *****************************************************************************/ 228 229 void 230 DtNameError ( 231 UINT8 Level, 232 UINT16 MessageId, 233 DT_FIELD *FieldObject, 234 char *ExtraMessage) 235 { 236 237 switch (Level) 238 { 239 case ASL_WARNING2: 240 case ASL_WARNING3: 241 242 if (Gbl_WarningLevel < Level) 243 { 244 return; 245 } 246 break; 247 248 default: 249 250 break; 251 } 252 253 if (FieldObject) 254 { 255 AslCommonError (Level, MessageId, 256 FieldObject->Line, 257 FieldObject->Line, 258 FieldObject->ByteOffset, 259 FieldObject->NameColumn, 260 Gbl_Files[ASL_FILE_INPUT].Filename, ExtraMessage); 261 } 262 else 263 { 264 AslCommonError (Level, MessageId, 0, 265 0, 0, 0, 0, ExtraMessage); 266 } 267 } 268 269 270 /******************************************************************************* 271 * 272 * FUNCTION: DtFatal 273 * 274 * PARAMETERS: None 275 * 276 * RETURN: None 277 * 278 * DESCRIPTION: Dump the error log and abort the compiler. Used for serious 279 * compile or I/O errors 280 * 281 ******************************************************************************/ 282 283 void 284 DtFatal ( 285 UINT16 MessageId, 286 DT_FIELD *FieldObject, 287 char *ExtraMessage) 288 { 289 290 DtError (ASL_ERROR, MessageId, FieldObject, ExtraMessage); 291 292 /* 293 * TBD: remove this entire function, DtFatal 294 * 295 * We cannot abort the compiler on error, because we may be compiling a 296 * list of files. We must move on to the next file. 297 */ 298 #ifdef __OBSOLETE 299 CmCleanupAndExit (); 300 exit (1); 301 #endif 302 } 303 304 305 /******************************************************************************* 306 * 307 * FUNCTION: DtDoConstant 308 * 309 * PARAMETERS: String - Only hex constants are supported, 310 * regardless of whether the 0x prefix 311 * is used 312 * 313 * RETURN: Converted Integer 314 * 315 * DESCRIPTION: Convert a string to an integer, with overflow/error checking. 316 * 317 ******************************************************************************/ 318 319 UINT64 320 DtDoConstant ( 321 char *String) 322 { 323 UINT64 ConvertedInteger; 324 325 326 /* 327 * TBD: The ImplicitStrtoul64 function does not report overflow 328 * conditions. The input string is simply truncated. If it is 329 * desired to report overflow to the table compiler, this should 330 * somehow be added here. Note: integers that are prefixed with 0x 331 * or not are both hex integers. 332 */ 333 ConvertedInteger = AcpiUtImplicitStrtoul64 (String); 334 return (ConvertedInteger); 335 } 336 337 /****************************************************************************** 338 * 339 * FUNCTION: DtGetFieldValue 340 * 341 * PARAMETERS: Field - Current field list pointer 342 * 343 * RETURN: Field value 344 * 345 * DESCRIPTION: Get field value 346 * 347 *****************************************************************************/ 348 349 char * 350 DtGetFieldValue ( 351 DT_FIELD *Field) 352 { 353 if (!Field) 354 { 355 return (NULL); 356 } 357 358 return (Field->Value); 359 } 360 361 362 /****************************************************************************** 363 * 364 * FUNCTION: DtGetFieldType 365 * 366 * PARAMETERS: Info - Data table info 367 * 368 * RETURN: Field type 369 * 370 * DESCRIPTION: Get field type 371 * 372 *****************************************************************************/ 373 374 UINT8 375 DtGetFieldType ( 376 ACPI_DMTABLE_INFO *Info) 377 { 378 UINT8 Type; 379 380 381 /* DT_FLAG means that this is the start of a block of flag bits */ 382 /* TBD - we can make these a separate opcode later */ 383 384 if (Info->Flags & DT_FLAG) 385 { 386 return (DT_FIELD_TYPE_FLAGS_INTEGER); 387 } 388 389 /* Type is based upon the opcode for this field in the info table */ 390 391 switch (Info->Opcode) 392 { 393 case ACPI_DMT_FLAG0: 394 case ACPI_DMT_FLAG1: 395 case ACPI_DMT_FLAG2: 396 case ACPI_DMT_FLAG3: 397 case ACPI_DMT_FLAG4: 398 case ACPI_DMT_FLAG5: 399 case ACPI_DMT_FLAG6: 400 case ACPI_DMT_FLAG7: 401 case ACPI_DMT_FLAGS0: 402 case ACPI_DMT_FLAGS1: 403 case ACPI_DMT_FLAGS2: 404 case ACPI_DMT_FLAGS4: 405 case ACPI_DMT_FLAGS4_0: 406 case ACPI_DMT_FLAGS4_4: 407 case ACPI_DMT_FLAGS4_8: 408 case ACPI_DMT_FLAGS4_12: 409 case ACPI_DMT_FLAGS16_16: 410 411 Type = DT_FIELD_TYPE_FLAG; 412 break; 413 414 case ACPI_DMT_NAME4: 415 case ACPI_DMT_SIG: 416 case ACPI_DMT_NAME6: 417 case ACPI_DMT_NAME8: 418 case ACPI_DMT_STRING: 419 420 Type = DT_FIELD_TYPE_STRING; 421 break; 422 423 case ACPI_DMT_BUFFER: 424 case ACPI_DMT_RAW_BUFFER: 425 case ACPI_DMT_BUF7: 426 case ACPI_DMT_BUF10: 427 case ACPI_DMT_BUF12: 428 case ACPI_DMT_BUF16: 429 case ACPI_DMT_BUF128: 430 case ACPI_DMT_PCI_PATH: 431 432 Type = DT_FIELD_TYPE_BUFFER; 433 break; 434 435 case ACPI_DMT_GAS: 436 case ACPI_DMT_HESTNTFY: 437 case ACPI_DMT_IORTMEM: 438 439 Type = DT_FIELD_TYPE_INLINE_SUBTABLE; 440 break; 441 442 case ACPI_DMT_UNICODE: 443 444 Type = DT_FIELD_TYPE_UNICODE; 445 break; 446 447 case ACPI_DMT_UUID: 448 449 Type = DT_FIELD_TYPE_UUID; 450 break; 451 452 case ACPI_DMT_DEVICE_PATH: 453 454 Type = DT_FIELD_TYPE_DEVICE_PATH; 455 break; 456 457 case ACPI_DMT_LABEL: 458 459 Type = DT_FIELD_TYPE_LABEL; 460 break; 461 462 default: 463 464 Type = DT_FIELD_TYPE_INTEGER; 465 break; 466 } 467 468 return (Type); 469 } 470 471 472 /****************************************************************************** 473 * 474 * FUNCTION: DtGetBufferLength 475 * 476 * PARAMETERS: Buffer - List of integers, 477 * for example "10 3A 4F 2E" 478 * 479 * RETURN: Count of integer 480 * 481 * DESCRIPTION: Get length of bytes needed to store the integers 482 * 483 *****************************************************************************/ 484 485 UINT32 486 DtGetBufferLength ( 487 char *Buffer) 488 { 489 UINT32 ByteLength = 0; 490 491 492 while (*Buffer) 493 { 494 if (*Buffer == ' ') 495 { 496 ByteLength++; 497 498 while (*Buffer == ' ') 499 { 500 Buffer++; 501 } 502 } 503 504 Buffer++; 505 } 506 507 return (++ByteLength); 508 } 509 510 511 /****************************************************************************** 512 * 513 * FUNCTION: DtGetFieldLength 514 * 515 * PARAMETERS: Field - Current field 516 * Info - Data table info 517 * 518 * RETURN: Field length 519 * 520 * DESCRIPTION: Get length of bytes needed to compile the field 521 * 522 * Note: This function must remain in sync with AcpiDmDumpTable. 523 * 524 *****************************************************************************/ 525 526 UINT32 527 DtGetFieldLength ( 528 DT_FIELD *Field, 529 ACPI_DMTABLE_INFO *Info) 530 { 531 UINT32 ByteLength = 0; 532 char *Value; 533 534 535 /* Length is based upon the opcode for this field in the info table */ 536 537 switch (Info->Opcode) 538 { 539 case ACPI_DMT_FLAG0: 540 case ACPI_DMT_FLAG1: 541 case ACPI_DMT_FLAG2: 542 case ACPI_DMT_FLAG3: 543 case ACPI_DMT_FLAG4: 544 case ACPI_DMT_FLAG5: 545 case ACPI_DMT_FLAG6: 546 case ACPI_DMT_FLAG7: 547 case ACPI_DMT_FLAGS0: 548 case ACPI_DMT_FLAGS1: 549 case ACPI_DMT_FLAGS2: 550 case ACPI_DMT_FLAGS4: 551 case ACPI_DMT_FLAGS4_0: 552 case ACPI_DMT_FLAGS4_4: 553 case ACPI_DMT_FLAGS4_8: 554 case ACPI_DMT_FLAGS4_12: 555 case ACPI_DMT_FLAGS16_16: 556 case ACPI_DMT_LABEL: 557 case ACPI_DMT_EXTRA_TEXT: 558 559 ByteLength = 0; 560 break; 561 562 case ACPI_DMT_UINT8: 563 case ACPI_DMT_CHKSUM: 564 case ACPI_DMT_SPACEID: 565 case ACPI_DMT_ACCWIDTH: 566 case ACPI_DMT_IVRS: 567 case ACPI_DMT_GTDT: 568 case ACPI_DMT_MADT: 569 case ACPI_DMT_PCCT: 570 case ACPI_DMT_PMTT: 571 case ACPI_DMT_PPTT: 572 case ACPI_DMT_SDEV: 573 case ACPI_DMT_SRAT: 574 case ACPI_DMT_ASF: 575 case ACPI_DMT_HESTNTYP: 576 case ACPI_DMT_FADTPM: 577 case ACPI_DMT_EINJACT: 578 case ACPI_DMT_EINJINST: 579 case ACPI_DMT_ERSTACT: 580 case ACPI_DMT_ERSTINST: 581 case ACPI_DMT_DMAR_SCOPE: 582 583 ByteLength = 1; 584 break; 585 586 case ACPI_DMT_UINT16: 587 case ACPI_DMT_DMAR: 588 case ACPI_DMT_HEST: 589 case ACPI_DMT_HMAT: 590 case ACPI_DMT_NFIT: 591 case ACPI_DMT_PCI_PATH: 592 593 ByteLength = 2; 594 break; 595 596 case ACPI_DMT_UINT24: 597 598 ByteLength = 3; 599 break; 600 601 case ACPI_DMT_UINT32: 602 case ACPI_DMT_NAME4: 603 case ACPI_DMT_SIG: 604 case ACPI_DMT_LPIT: 605 case ACPI_DMT_TPM2: 606 607 ByteLength = 4; 608 break; 609 610 case ACPI_DMT_UINT40: 611 612 ByteLength = 5; 613 break; 614 615 case ACPI_DMT_UINT48: 616 case ACPI_DMT_NAME6: 617 618 ByteLength = 6; 619 break; 620 621 case ACPI_DMT_UINT56: 622 case ACPI_DMT_BUF7: 623 624 ByteLength = 7; 625 break; 626 627 case ACPI_DMT_UINT64: 628 case ACPI_DMT_NAME8: 629 630 ByteLength = 8; 631 break; 632 633 case ACPI_DMT_STRING: 634 635 Value = DtGetFieldValue (Field); 636 if (Value) 637 { 638 ByteLength = strlen (Value) + 1; 639 } 640 else 641 { /* At this point, this is a fatal error */ 642 643 sprintf (MsgBuffer, "Expected \"%s\"", Info->Name); 644 DtFatal (ASL_MSG_COMPILER_INTERNAL, NULL, MsgBuffer); 645 return (0); 646 } 647 break; 648 649 case ACPI_DMT_GAS: 650 651 ByteLength = sizeof (ACPI_GENERIC_ADDRESS); 652 break; 653 654 case ACPI_DMT_HESTNTFY: 655 656 ByteLength = sizeof (ACPI_HEST_NOTIFY); 657 break; 658 659 case ACPI_DMT_IORTMEM: 660 661 ByteLength = sizeof (ACPI_IORT_MEMORY_ACCESS); 662 break; 663 664 case ACPI_DMT_BUFFER: 665 case ACPI_DMT_RAW_BUFFER: 666 667 Value = DtGetFieldValue (Field); 668 if (Value) 669 { 670 ByteLength = DtGetBufferLength (Value); 671 } 672 else 673 { /* At this point, this is a fatal error */ 674 675 sprintf (MsgBuffer, "Expected \"%s\"", Info->Name); 676 DtFatal (ASL_MSG_COMPILER_INTERNAL, NULL, MsgBuffer); 677 return (0); 678 } 679 break; 680 681 case ACPI_DMT_BUF10: 682 683 ByteLength = 10; 684 break; 685 686 case ACPI_DMT_BUF12: 687 688 ByteLength = 12; 689 break; 690 691 case ACPI_DMT_BUF16: 692 case ACPI_DMT_UUID: 693 694 ByteLength = 16; 695 break; 696 697 case ACPI_DMT_BUF128: 698 699 ByteLength = 128; 700 break; 701 702 case ACPI_DMT_UNICODE: 703 704 Value = DtGetFieldValue (Field); 705 706 /* TBD: error if Value is NULL? (as below?) */ 707 708 ByteLength = (strlen (Value) + 1) * sizeof(UINT16); 709 break; 710 711 default: 712 713 DtFatal (ASL_MSG_COMPILER_INTERNAL, Field, "Invalid table opcode"); 714 return (0); 715 } 716 717 return (ByteLength); 718 } 719 720 721 /****************************************************************************** 722 * 723 * FUNCTION: DtSum 724 * 725 * PARAMETERS: DT_WALK_CALLBACK: 726 * Subtable - Subtable 727 * Context - Unused 728 * ReturnValue - Store the checksum of subtable 729 * 730 * RETURN: Status 731 * 732 * DESCRIPTION: Get the checksum of subtable 733 * 734 *****************************************************************************/ 735 736 static void 737 DtSum ( 738 DT_SUBTABLE *Subtable, 739 void *Context, 740 void *ReturnValue) 741 { 742 UINT8 Checksum; 743 UINT8 *Sum = ReturnValue; 744 745 746 Checksum = AcpiTbChecksum (Subtable->Buffer, Subtable->Length); 747 *Sum = (UINT8) (*Sum + Checksum); 748 } 749 750 751 /****************************************************************************** 752 * 753 * FUNCTION: DtSetTableChecksum 754 * 755 * PARAMETERS: ChecksumPointer - Where to return the checksum 756 * 757 * RETURN: None 758 * 759 * DESCRIPTION: Set checksum of the whole data table into the checksum field 760 * 761 *****************************************************************************/ 762 763 void 764 DtSetTableChecksum ( 765 UINT8 *ChecksumPointer) 766 { 767 UINT8 Checksum = 0; 768 UINT8 OldSum; 769 770 771 DtWalkTableTree (Gbl_RootTable, DtSum, NULL, &Checksum); 772 773 OldSum = *ChecksumPointer; 774 Checksum = (UINT8) (Checksum - OldSum); 775 776 /* Compute the final checksum */ 777 778 Checksum = (UINT8) (0 - Checksum); 779 *ChecksumPointer = Checksum; 780 } 781 782 783 /****************************************************************************** 784 * 785 * FUNCTION: DtSetTableLength 786 * 787 * PARAMETERS: None 788 * 789 * RETURN: None 790 * 791 * DESCRIPTION: Walk the subtables and set all the length fields 792 * 793 *****************************************************************************/ 794 795 void 796 DtSetTableLength ( 797 void) 798 { 799 DT_SUBTABLE *ParentTable; 800 DT_SUBTABLE *ChildTable; 801 802 803 ParentTable = Gbl_RootTable; 804 ChildTable = NULL; 805 806 if (!ParentTable) 807 { 808 return; 809 } 810 811 DtSetSubtableLength (ParentTable); 812 813 while (1) 814 { 815 ChildTable = DtGetNextSubtable (ParentTable, ChildTable); 816 if (ChildTable) 817 { 818 if (ChildTable->LengthField) 819 { 820 DtSetSubtableLength (ChildTable); 821 } 822 823 if (ChildTable->Child) 824 { 825 ParentTable = ChildTable; 826 ChildTable = NULL; 827 } 828 else 829 { 830 ParentTable->TotalLength += ChildTable->TotalLength; 831 if (ParentTable->LengthField) 832 { 833 DtSetSubtableLength (ParentTable); 834 } 835 } 836 } 837 else 838 { 839 ChildTable = ParentTable; 840 841 if (ChildTable == Gbl_RootTable) 842 { 843 break; 844 } 845 846 ParentTable = DtGetParentSubtable (ParentTable); 847 848 ParentTable->TotalLength += ChildTable->TotalLength; 849 if (ParentTable->LengthField) 850 { 851 DtSetSubtableLength (ParentTable); 852 } 853 } 854 } 855 } 856 857 858 /****************************************************************************** 859 * 860 * FUNCTION: DtWalkTableTree 861 * 862 * PARAMETERS: StartTable - Subtable in the tree where walking begins 863 * UserFunction - Called during the walk 864 * Context - Passed to user function 865 * ReturnValue - The return value of UserFunction 866 * 867 * RETURN: None 868 * 869 * DESCRIPTION: Performs a depth-first walk of the subtable tree 870 * 871 *****************************************************************************/ 872 873 void 874 DtWalkTableTree ( 875 DT_SUBTABLE *StartTable, 876 DT_WALK_CALLBACK UserFunction, 877 void *Context, 878 void *ReturnValue) 879 { 880 DT_SUBTABLE *ParentTable; 881 DT_SUBTABLE *ChildTable; 882 883 884 ParentTable = StartTable; 885 ChildTable = NULL; 886 887 if (!ParentTable) 888 { 889 return; 890 } 891 892 UserFunction (ParentTable, Context, ReturnValue); 893 894 while (1) 895 { 896 ChildTable = DtGetNextSubtable (ParentTable, ChildTable); 897 if (ChildTable) 898 { 899 UserFunction (ChildTable, Context, ReturnValue); 900 901 if (ChildTable->Child) 902 { 903 ParentTable = ChildTable; 904 ChildTable = NULL; 905 } 906 } 907 else 908 { 909 ChildTable = ParentTable; 910 if (ChildTable == Gbl_RootTable) 911 { 912 break; 913 } 914 915 ParentTable = DtGetParentSubtable (ParentTable); 916 917 if (ChildTable->Peer == StartTable) 918 { 919 break; 920 } 921 } 922 } 923 } 924