1 /****************************************************************************** 2 * 3 * Module Name: aslprepkg - support for ACPI predefined name package objects 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2020, 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 "aslcompiler.y.h" 154 #include "acpredef.h" 155 156 157 #define _COMPONENT ACPI_COMPILER 158 ACPI_MODULE_NAME ("aslprepkg") 159 160 161 /* Local prototypes */ 162 163 static ACPI_PARSE_OBJECT * 164 ApCheckPackageElements ( 165 const char *PredefinedName, 166 ACPI_PARSE_OBJECT *Op, 167 UINT8 Type1, 168 UINT32 Count1, 169 UINT8 Type2, 170 UINT32 Count2); 171 172 static void 173 ApCheckPackageList ( 174 const char *PredefinedName, 175 ACPI_PARSE_OBJECT *ParentOp, 176 const ACPI_PREDEFINED_INFO *Package, 177 UINT32 StartIndex, 178 UINT32 Count); 179 180 static void 181 ApPackageTooSmall ( 182 const char *PredefinedName, 183 ACPI_PARSE_OBJECT *Op, 184 UINT32 Count, 185 UINT32 ExpectedCount); 186 187 static void 188 ApZeroLengthPackage ( 189 const char *PredefinedName, 190 ACPI_PARSE_OBJECT *Op); 191 192 static void 193 ApPackageTooLarge ( 194 const char *PredefinedName, 195 ACPI_PARSE_OBJECT *Op, 196 UINT32 Count, 197 UINT32 ExpectedCount); 198 199 static void 200 ApCustomPackage ( 201 ACPI_PARSE_OBJECT *ParentOp, 202 const ACPI_PREDEFINED_INFO *Predefined); 203 204 205 /******************************************************************************* 206 * 207 * FUNCTION: ApCheckPackage 208 * 209 * PARAMETERS: ParentOp - Parser op for the package 210 * Predefined - Pointer to package-specific info for 211 * the method 212 * 213 * RETURN: None 214 * 215 * DESCRIPTION: Top-level validation for predefined name return package 216 * objects. 217 * 218 ******************************************************************************/ 219 220 void 221 ApCheckPackage ( 222 ACPI_PARSE_OBJECT *ParentOp, 223 const ACPI_PREDEFINED_INFO *Predefined) 224 { 225 ACPI_PARSE_OBJECT *Op; 226 const ACPI_PREDEFINED_INFO *Package; 227 ACPI_STATUS Status; 228 UINT32 ExpectedCount; 229 UINT32 Count; 230 UINT32 i; 231 232 233 /* The package info for this name is in the next table entry */ 234 235 Package = Predefined + 1; 236 237 /* First child is the package length */ 238 239 Op = ParentOp->Asl.Child; 240 Count = (UINT32) Op->Asl.Value.Integer; 241 242 /* 243 * Many of the variable-length top-level packages are allowed to simply 244 * have zero elements. This allows the BIOS to tell the host that even 245 * though the predefined name/method exists, the feature is not supported. 246 * Other package types require one or more elements. In any case, there 247 * is no need to continue validation. 248 */ 249 if (!Count) 250 { 251 switch (Package->RetInfo.Type) 252 { 253 case ACPI_PTYPE1_FIXED: 254 case ACPI_PTYPE1_OPTION: 255 case ACPI_PTYPE2_PKG_COUNT: 256 case ACPI_PTYPE2_REV_FIXED: 257 258 ApZeroLengthPackage (Predefined->Info.Name, ParentOp); 259 break; 260 261 case ACPI_PTYPE1_VAR: 262 case ACPI_PTYPE2: 263 case ACPI_PTYPE2_COUNT: 264 case ACPI_PTYPE2_FIXED: 265 case ACPI_PTYPE2_MIN: 266 case ACPI_PTYPE2_FIX_VAR: 267 case ACPI_PTYPE2_VAR_VAR: 268 default: 269 270 break; 271 } 272 273 return; 274 } 275 276 /* Get the first element of the package */ 277 278 Op = Op->Asl.Next; 279 280 /* Decode the package type */ 281 282 switch (Package->RetInfo.Type) 283 { 284 case ACPI_PTYPE_CUSTOM: 285 286 ApCustomPackage (ParentOp, Predefined); 287 break; 288 289 case ACPI_PTYPE1_FIXED: 290 /* 291 * The package count is fixed and there are no subpackages 292 * 293 * If package is too small, exit. 294 * If package is larger than expected, issue warning but continue 295 */ 296 ExpectedCount = Package->RetInfo.Count1 + Package->RetInfo.Count2; 297 if (Count < ExpectedCount) 298 { 299 goto PackageTooSmall; 300 } 301 else if (Count > ExpectedCount) 302 { 303 ApPackageTooLarge (Predefined->Info.Name, ParentOp, 304 Count, ExpectedCount); 305 } 306 307 /* Validate all elements of the package */ 308 309 ApCheckPackageElements (Predefined->Info.Name, Op, 310 Package->RetInfo.ObjectType1, Package->RetInfo.Count1, 311 Package->RetInfo.ObjectType2, Package->RetInfo.Count2); 312 break; 313 314 case ACPI_PTYPE1_VAR: 315 /* 316 * The package count is variable, there are no subpackages, 317 * and all elements must be of the same type 318 */ 319 for (i = 0; i < Count; i++) 320 { 321 if (!Op) 322 { 323 /* 324 * If we get to this point, it means that the package length 325 * is larger than the initializer list. Stop processing the 326 * package and return because we have run out of package 327 * elements to analyze. 328 */ 329 return; 330 } 331 332 ApCheckObjectType (Predefined->Info.Name, Op, 333 Package->RetInfo.ObjectType1, i); 334 Op = Op->Asl.Next; 335 } 336 break; 337 338 case ACPI_PTYPE1_OPTION: 339 /* 340 * The package count is variable, there are no subpackages. 341 * There are a fixed number of required elements, and a variable 342 * number of optional elements. 343 * 344 * Check if package is at least as large as the minimum required 345 */ 346 ExpectedCount = Package->RetInfo3.Count; 347 if (Count < ExpectedCount) 348 { 349 goto PackageTooSmall; 350 } 351 352 /* Variable number of sub-objects */ 353 354 for (i = 0; i < Count; i++) 355 { 356 if (i < Package->RetInfo3.Count) 357 { 358 /* These are the required package elements (0, 1, or 2) */ 359 360 ApCheckObjectType (Predefined->Info.Name, Op, 361 Package->RetInfo3.ObjectType[i], i); 362 } 363 else 364 { 365 /* These are the optional package elements */ 366 367 ApCheckObjectType (Predefined->Info.Name, Op, 368 Package->RetInfo3.TailObjectType, i); 369 } 370 371 Op = Op->Asl.Next; 372 } 373 break; 374 375 case ACPI_PTYPE2_REV_FIXED: 376 377 /* First element is the (Integer) revision */ 378 379 ApCheckObjectType (Predefined->Info.Name, Op, 380 ACPI_RTYPE_INTEGER, 0); 381 382 Op = Op->Asl.Next; 383 Count--; 384 385 /* Examine the subpackages */ 386 387 ApCheckPackageList (Predefined->Info.Name, Op, 388 Package, 1, Count); 389 break; 390 391 case ACPI_PTYPE2_PKG_COUNT: 392 393 /* First element is the (Integer) count of subpackages to follow */ 394 395 Status = ApCheckObjectType (Predefined->Info.Name, Op, 396 ACPI_RTYPE_INTEGER, 0); 397 398 /* We must have an integer count from above (otherwise, use Count) */ 399 400 if (ACPI_SUCCESS (Status)) 401 { 402 /* 403 * Count cannot be larger than the parent package length, but 404 * allow it to be smaller. The >= accounts for the Integer above. 405 */ 406 ExpectedCount = (UINT32) Op->Asl.Value.Integer; 407 if (ExpectedCount >= Count) 408 { 409 goto PackageTooSmall; 410 } 411 412 Count = ExpectedCount; 413 } 414 415 Op = Op->Asl.Next; 416 417 /* Examine the subpackages */ 418 419 ApCheckPackageList (Predefined->Info.Name, Op, 420 Package, 1, Count); 421 break; 422 423 case ACPI_PTYPE2_UUID_PAIR: 424 425 /* The package contains a variable list of UUID Buffer/Package pairs */ 426 427 /* The length of the package must be even */ 428 429 if (Count & 1) 430 { 431 sprintf (AslGbl_MsgBuffer, "%4.4s: Package length, %d, must be even.", 432 Predefined->Info.Name, Count); 433 434 AslError (ASL_ERROR, ASL_MSG_RESERVED_PACKAGE_LENGTH, 435 ParentOp->Asl.Child, AslGbl_MsgBuffer); 436 } 437 438 /* Validate the alternating types */ 439 440 for (i = 0; i < Count; ++i) 441 { 442 if (i & 1) 443 { 444 ApCheckObjectType (Predefined->Info.Name, Op, 445 Package->RetInfo.ObjectType2, i); 446 } 447 else 448 { 449 ApCheckObjectType (Predefined->Info.Name, Op, 450 Package->RetInfo.ObjectType1, i); 451 } 452 453 Op = Op->Asl.Next; 454 } 455 456 break; 457 458 case ACPI_PTYPE2_VAR_VAR: 459 460 /* Check for minimum size (ints at beginning + 1 subpackage) */ 461 462 ExpectedCount = Package->RetInfo4.Count1 + 1; 463 if (Count < ExpectedCount) 464 { 465 goto PackageTooSmall; 466 } 467 468 /* Check the non-package elements at beginning of main package */ 469 470 for (i = 0; i < Package->RetInfo4.Count1; ++i) 471 { 472 ApCheckObjectType (Predefined->Info.Name, Op, 473 Package->RetInfo4.ObjectType1, i); 474 Op = Op->Asl.Next; 475 } 476 477 /* Examine the variable-length list of subpackages */ 478 479 ApCheckPackageList (Predefined->Info.Name, Op, 480 Package, Package->RetInfo4.Count1, Count); 481 482 break; 483 484 case ACPI_PTYPE2: 485 case ACPI_PTYPE2_FIXED: 486 case ACPI_PTYPE2_MIN: 487 case ACPI_PTYPE2_COUNT: 488 case ACPI_PTYPE2_FIX_VAR: 489 /* 490 * These types all return a single Package that consists of a 491 * variable number of subpackages. 492 */ 493 494 /* Examine the subpackages */ 495 496 ApCheckPackageList (Predefined->Info.Name, Op, 497 Package, 0, Count); 498 break; 499 500 default: 501 return; 502 } 503 504 return; 505 506 PackageTooSmall: 507 ApPackageTooSmall (Predefined->Info.Name, ParentOp, 508 Count, ExpectedCount); 509 } 510 511 512 /******************************************************************************* 513 * 514 * FUNCTION: ApCustomPackage 515 * 516 * PARAMETERS: ParentOp - Parse op for the package 517 * Predefined - Pointer to package-specific info for 518 * the method 519 * 520 * RETURN: None 521 * 522 * DESCRIPTION: Validate packages that don't fit into the standard model and 523 * require custom code. 524 * 525 * NOTE: Currently used for the _BIX method only. When needed for two or more 526 * methods, probably a detect/dispatch mechanism will be required. 527 * 528 ******************************************************************************/ 529 530 static void 531 ApCustomPackage ( 532 ACPI_PARSE_OBJECT *ParentOp, 533 const ACPI_PREDEFINED_INFO *Predefined) 534 { 535 ACPI_PARSE_OBJECT *Op; 536 UINT32 Count; 537 UINT32 ExpectedCount; 538 UINT32 Version; 539 540 541 /* First child is the package length */ 542 543 Op = ParentOp->Asl.Child; 544 Count = (UINT32) Op->Asl.Value.Integer; 545 546 /* Get the version number, must be Integer */ 547 548 Op = Op->Asl.Next; 549 Version = (UINT32) Op->Asl.Value.Integer; 550 if (Op->Asl.ParseOpcode != PARSEOP_INTEGER) 551 { 552 AslError (ASL_ERROR, ASL_MSG_RESERVED_OPERAND_TYPE, Op, AslGbl_MsgBuffer); 553 return; 554 } 555 556 /* Validate count (# of elements) */ 557 558 ExpectedCount = 21; /* Version 1 */ 559 if (Version == 0) 560 { 561 ExpectedCount = 20; /* Version 0 */ 562 } 563 564 if (Count < ExpectedCount) 565 { 566 ApPackageTooSmall (Predefined->Info.Name, ParentOp, 567 Count, ExpectedCount); 568 return; 569 } 570 else if (Count > ExpectedCount) 571 { 572 ApPackageTooLarge (Predefined->Info.Name, ParentOp, 573 Count, ExpectedCount); 574 } 575 576 /* Validate all elements of the package */ 577 578 Op = ApCheckPackageElements (Predefined->Info.Name, Op, 579 ACPI_RTYPE_INTEGER, 16, 580 ACPI_RTYPE_STRING, 4); 581 582 /* Version 1 has a single trailing integer */ 583 584 if (Version > 0) 585 { 586 ApCheckPackageElements (Predefined->Info.Name, Op, 587 ACPI_RTYPE_INTEGER, 1, 0, 0); 588 } 589 } 590 591 592 /******************************************************************************* 593 * 594 * FUNCTION: ApCheckPackageElements 595 * 596 * PARAMETERS: PredefinedName - Name of the predefined object 597 * Op - Parser op for the package 598 * Type1 - Object type for first group 599 * Count1 - Count for first group 600 * Type2 - Object type for second group 601 * Count2 - Count for second group 602 * 603 * RETURN: Next Op peer in the parse tree, after all specified elements 604 * have been validated. Used for multiple validations (calls 605 * to this function). 606 * 607 * DESCRIPTION: Validate all elements of a package. Works with packages that 608 * are defined to contain up to two groups of different object 609 * types. 610 * 611 ******************************************************************************/ 612 613 static ACPI_PARSE_OBJECT * 614 ApCheckPackageElements ( 615 const char *PredefinedName, 616 ACPI_PARSE_OBJECT *Op, 617 UINT8 Type1, 618 UINT32 Count1, 619 UINT8 Type2, 620 UINT32 Count2) 621 { 622 UINT32 i; 623 624 625 /* 626 * Up to two groups of package elements are supported by the data 627 * structure. All elements in each group must be of the same type. 628 * The second group can have a count of zero. 629 * 630 * Aborts check upon a NULL package element, as this means (at compile 631 * time) that the remainder of the package elements are also NULL 632 * (This is the only way to create NULL package elements.) 633 */ 634 for (i = 0; (i < Count1) && Op; i++) 635 { 636 ApCheckObjectType (PredefinedName, Op, Type1, i); 637 Op = Op->Asl.Next; 638 } 639 640 for (i = 0; (i < Count2) && Op; i++) 641 { 642 ApCheckObjectType (PredefinedName, Op, Type2, (i + Count1)); 643 Op = Op->Asl.Next; 644 } 645 646 return (Op); 647 } 648 649 650 /******************************************************************************* 651 * 652 * FUNCTION: ApCheckPackageList 653 * 654 * PARAMETERS: PredefinedName - Name of the predefined object 655 * ParentOp - Parser op of the parent package 656 * Package - Package info for this predefined name 657 * StartIndex - Index in parent package where list begins 658 * ParentCount - Element count of parent package 659 * 660 * RETURN: None 661 * 662 * DESCRIPTION: Validate the individual package elements for a predefined name. 663 * Handles the cases where the predefined name is defined as a 664 * Package of Packages (subpackages). These are the types: 665 * 666 * ACPI_PTYPE2 667 * ACPI_PTYPE2_FIXED 668 * ACPI_PTYPE2_MIN 669 * ACPI_PTYPE2_COUNT 670 * ACPI_PTYPE2_FIX_VAR 671 * ACPI_PTYPE2_VAR_VAR 672 * 673 ******************************************************************************/ 674 675 static void 676 ApCheckPackageList ( 677 const char *PredefinedName, 678 ACPI_PARSE_OBJECT *ParentOp, 679 const ACPI_PREDEFINED_INFO *Package, 680 UINT32 StartIndex, 681 UINT32 ParentCount) 682 { 683 ACPI_PARSE_OBJECT *SubPackageOp = ParentOp; 684 ACPI_PARSE_OBJECT *Op; 685 ACPI_STATUS Status; 686 UINT32 Count; 687 UINT32 ExpectedCount; 688 UINT32 i; 689 UINT32 j; 690 691 692 /* 693 * Validate each subpackage in the parent Package 694 * 695 * Note: We ignore NULL package elements on the assumption that 696 * they will be initialized by the BIOS or other ASL code. 697 */ 698 for (i = 0; (i < ParentCount) && SubPackageOp; i++) 699 { 700 /* Each object in the list must be of type Package */ 701 702 Status = ApCheckObjectType (PredefinedName, SubPackageOp, 703 ACPI_RTYPE_PACKAGE, i + StartIndex); 704 if (ACPI_FAILURE (Status)) 705 { 706 goto NextSubpackage; 707 } 708 709 /* Examine the different types of expected subpackages */ 710 711 Op = SubPackageOp->Asl.Child; 712 713 /* First child is the package length */ 714 715 Count = (UINT32) Op->Asl.Value.Integer; 716 Op = Op->Asl.Next; 717 718 /* 719 * Most subpackage must have at least one element, with 720 * only rare exceptions. (_RDI) 721 */ 722 if (!Count && 723 (Package->RetInfo.Type != ACPI_PTYPE2_VAR_VAR)) 724 { 725 ApZeroLengthPackage (PredefinedName, SubPackageOp); 726 goto NextSubpackage; 727 } 728 729 /* 730 * Decode the package type. 731 * PTYPE2 indicates that a "package of packages" is expected for 732 * this name. The various flavors of PTYPE2 indicate the number 733 * and format of the subpackages. 734 */ 735 switch (Package->RetInfo.Type) 736 { 737 case ACPI_PTYPE2: 738 case ACPI_PTYPE2_PKG_COUNT: 739 case ACPI_PTYPE2_REV_FIXED: 740 741 /* Each subpackage has a fixed number of elements */ 742 743 ExpectedCount = Package->RetInfo.Count1 + Package->RetInfo.Count2; 744 if (Count < ExpectedCount) 745 { 746 ApPackageTooSmall (PredefinedName, SubPackageOp, 747 Count, ExpectedCount); 748 break; 749 } 750 if (Count > ExpectedCount) 751 { 752 ApPackageTooLarge (PredefinedName, SubPackageOp, 753 Count, ExpectedCount); 754 break; 755 } 756 757 ApCheckPackageElements (PredefinedName, Op, 758 Package->RetInfo.ObjectType1, Package->RetInfo.Count1, 759 Package->RetInfo.ObjectType2, Package->RetInfo.Count2); 760 break; 761 762 case ACPI_PTYPE2_FIX_VAR: 763 /* 764 * Each subpackage has a fixed number of elements and an 765 * optional element 766 */ 767 ExpectedCount = Package->RetInfo.Count1 + Package->RetInfo.Count2; 768 if (Count < ExpectedCount) 769 { 770 ApPackageTooSmall (PredefinedName, SubPackageOp, 771 Count, ExpectedCount); 772 break; 773 } 774 775 ApCheckPackageElements (PredefinedName, Op, 776 Package->RetInfo.ObjectType1, Package->RetInfo.Count1, 777 Package->RetInfo.ObjectType2, 778 Count - Package->RetInfo.Count1); 779 break; 780 781 case ACPI_PTYPE2_VAR_VAR: 782 /* 783 * Must have at least the minimum number elements. 784 * A zero PkgCount means the number of elements is variable. 785 */ 786 ExpectedCount = Package->RetInfo4.PkgCount; 787 if (ExpectedCount && (Count < ExpectedCount)) 788 { 789 ApPackageTooSmall (PredefinedName, SubPackageOp, 790 Count, 1); 791 break; 792 } 793 794 ApCheckPackageElements (PredefinedName, Op, 795 Package->RetInfo4.SubObjectTypes, 796 Package->RetInfo4.PkgCount, 797 0, 0); 798 break; 799 800 case ACPI_PTYPE2_FIXED: 801 802 /* Each subpackage has a fixed length */ 803 804 ExpectedCount = Package->RetInfo2.Count; 805 if (Count < ExpectedCount) 806 { 807 ApPackageTooSmall (PredefinedName, SubPackageOp, 808 Count, ExpectedCount); 809 break; 810 } 811 if (Count > ExpectedCount) 812 { 813 ApPackageTooLarge (PredefinedName, SubPackageOp, 814 Count, ExpectedCount); 815 break; 816 } 817 818 /* Check each object/type combination */ 819 820 for (j = 0; j < ExpectedCount; j++) 821 { 822 ApCheckObjectType (PredefinedName, Op, 823 Package->RetInfo2.ObjectType[j], j); 824 825 Op = Op->Asl.Next; 826 } 827 break; 828 829 case ACPI_PTYPE2_MIN: 830 831 /* Each subpackage has a variable but minimum length */ 832 833 ExpectedCount = Package->RetInfo.Count1; 834 if (Count < ExpectedCount) 835 { 836 ApPackageTooSmall (PredefinedName, SubPackageOp, 837 Count, ExpectedCount); 838 break; 839 } 840 841 /* Check the type of each subpackage element */ 842 843 ApCheckPackageElements (PredefinedName, Op, 844 Package->RetInfo.ObjectType1, Count, 0, 0); 845 break; 846 847 case ACPI_PTYPE2_COUNT: 848 /* 849 * First element is the (Integer) count of elements, including 850 * the count field (the ACPI name is NumElements) 851 */ 852 Status = ApCheckObjectType (PredefinedName, Op, 853 ACPI_RTYPE_INTEGER, 0); 854 855 /* We must have an integer count from above (otherwise, use Count) */ 856 857 if (ACPI_SUCCESS (Status)) 858 { 859 /* 860 * Make sure package is large enough for the Count and is 861 * is as large as the minimum size 862 */ 863 ExpectedCount = (UINT32) Op->Asl.Value.Integer; 864 865 if (Count < ExpectedCount) 866 { 867 ApPackageTooSmall (PredefinedName, SubPackageOp, 868 Count, ExpectedCount); 869 break; 870 } 871 else if (Count > ExpectedCount) 872 { 873 ApPackageTooLarge (PredefinedName, SubPackageOp, 874 Count, ExpectedCount); 875 } 876 877 /* Some names of this type have a minimum length */ 878 879 if (Count < Package->RetInfo.Count1) 880 { 881 ExpectedCount = Package->RetInfo.Count1; 882 ApPackageTooSmall (PredefinedName, SubPackageOp, 883 Count, ExpectedCount); 884 break; 885 } 886 887 Count = ExpectedCount; 888 } 889 890 /* Check the type of each subpackage element */ 891 892 Op = Op->Asl.Next; 893 ApCheckPackageElements (PredefinedName, Op, 894 Package->RetInfo.ObjectType1, (Count - 1), 0, 0); 895 break; 896 897 default: 898 break; 899 } 900 901 NextSubpackage: 902 SubPackageOp = SubPackageOp->Asl.Next; 903 } 904 } 905 906 907 /******************************************************************************* 908 * 909 * FUNCTION: ApPackageTooSmall 910 * 911 * PARAMETERS: PredefinedName - Name of the predefined object 912 * Op - Current parser op 913 * Count - Actual package element count 914 * ExpectedCount - Expected package element count 915 * 916 * RETURN: None 917 * 918 * DESCRIPTION: Issue error message for a package that is smaller than 919 * required. 920 * 921 ******************************************************************************/ 922 923 static void 924 ApPackageTooSmall ( 925 const char *PredefinedName, 926 ACPI_PARSE_OBJECT *Op, 927 UINT32 Count, 928 UINT32 ExpectedCount) 929 { 930 931 sprintf (AslGbl_MsgBuffer, "%4.4s: length %u, required minimum is %u", 932 PredefinedName, Count, ExpectedCount); 933 934 AslError (ASL_ERROR, ASL_MSG_RESERVED_PACKAGE_LENGTH, Op, AslGbl_MsgBuffer); 935 } 936 937 938 /******************************************************************************* 939 * 940 * FUNCTION: ApZeroLengthPackage 941 * 942 * PARAMETERS: PredefinedName - Name of the predefined object 943 * Op - Current parser op 944 * 945 * RETURN: None 946 * 947 * DESCRIPTION: Issue error message for a zero-length package (a package that 948 * is required to have a non-zero length). Variable length 949 * packages seem to be allowed to have zero length, however. 950 * Even if not allowed, BIOS code does it. 951 * 952 ******************************************************************************/ 953 954 static void 955 ApZeroLengthPackage ( 956 const char *PredefinedName, 957 ACPI_PARSE_OBJECT *Op) 958 { 959 960 sprintf (AslGbl_MsgBuffer, "%4.4s: length is zero", PredefinedName); 961 962 AslError (ASL_ERROR, ASL_MSG_RESERVED_PACKAGE_LENGTH, Op, AslGbl_MsgBuffer); 963 } 964 965 966 /******************************************************************************* 967 * 968 * FUNCTION: ApPackageTooLarge 969 * 970 * PARAMETERS: PredefinedName - Name of the predefined object 971 * Op - Current parser op 972 * Count - Actual package element count 973 * ExpectedCount - Expected package element count 974 * 975 * RETURN: None 976 * 977 * DESCRIPTION: Issue a remark for a package that is larger than expected. 978 * 979 ******************************************************************************/ 980 981 static void 982 ApPackageTooLarge ( 983 const char *PredefinedName, 984 ACPI_PARSE_OBJECT *Op, 985 UINT32 Count, 986 UINT32 ExpectedCount) 987 { 988 989 sprintf (AslGbl_MsgBuffer, "%4.4s: length is %u, only %u required", 990 PredefinedName, Count, ExpectedCount); 991 992 AslError (ASL_REMARK, ASL_MSG_RESERVED_PACKAGE_LENGTH, Op, AslGbl_MsgBuffer); 993 } 994