psargs.c revision 91116
1/****************************************************************************** 2 * 3 * Module Name: psargs - Parse AML opcode arguments 4 * $Revision: 58 $ 5 * 6 *****************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2002, Intel Corp. 13 * All rights reserved. 14 * 15 * 2. License 16 * 17 * 2.1. This is your license from Intel Corp. under its intellectual property 18 * rights. You may have additional license terms from the party that provided 19 * you this software, covering your right to use that party's intellectual 20 * property rights. 21 * 22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 23 * copy of the source code appearing in this file ("Covered Code") an 24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 25 * base code distributed originally by Intel ("Original Intel Code") to copy, 26 * make derivatives, distribute, use and display any portion of the Covered 27 * Code in any form, with the right to sublicense such rights; and 28 * 29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 30 * license (with the right to sublicense), under only those claims of Intel 31 * patents that are infringed by the Original Intel Code, to make, use, sell, 32 * offer to sell, and import the Covered Code and derivative works thereof 33 * solely to the minimum extent necessary to exercise the above copyright 34 * license, and in no event shall the patent license extend to any additions 35 * to or modifications of the Original Intel Code. No other license or right 36 * is granted directly or by implication, estoppel or otherwise; 37 * 38 * The above copyright and patent license is granted only if the following 39 * conditions are met: 40 * 41 * 3. Conditions 42 * 43 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 44 * Redistribution of source code of any substantial portion of the Covered 45 * Code or modification with rights to further distribute source must include 46 * the above Copyright Notice, the above License, this list of Conditions, 47 * and the following Disclaimer and Export Compliance provision. In addition, 48 * Licensee must cause all Covered Code to which Licensee contributes to 49 * contain a file documenting the changes Licensee made to create that Covered 50 * Code and the date of any change. Licensee must include in that file the 51 * documentation of any changes made by any predecessor Licensee. Licensee 52 * must include a prominent statement that the modification is derived, 53 * directly or indirectly, from Original Intel Code. 54 * 55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 56 * Redistribution of source code of any substantial portion of the Covered 57 * Code or modification without rights to further distribute source must 58 * include the following Disclaimer and Export Compliance provision in the 59 * documentation and/or other materials provided with distribution. In 60 * addition, Licensee may not authorize further sublicense of source of any 61 * portion of the Covered Code, and must include terms to the effect that the 62 * license from Licensee to its licensee is limited to the intellectual 63 * property embodied in the software Licensee provides to its licensee, and 64 * not to intellectual property embodied in modifications its licensee may 65 * make. 66 * 67 * 3.3. Redistribution of Executable. Redistribution in executable form of any 68 * substantial portion of the Covered Code or modification must reproduce the 69 * above Copyright Notice, and the following Disclaimer and Export Compliance 70 * provision in the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3.4. Intel retains all right, title, and interest in and to the Original 74 * Intel Code. 75 * 76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 77 * Intel shall be used in advertising or otherwise to promote the sale, use or 78 * other dealings in products derived from or relating to the Covered Code 79 * without prior written authorization from Intel. 80 * 81 * 4. Disclaimer and Export Compliance 82 * 83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 89 * PARTICULAR PURPOSE. 90 * 91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 98 * LIMITED REMEDY. 99 * 100 * 4.3. Licensee shall not export, either directly or indirectly, any of this 101 * software or system incorporating such software without first obtaining any 102 * required license or other approval from the U. S. Department of Commerce or 103 * any other agency or department of the United States Government. In the 104 * event Licensee exports any such software from the United States or 105 * re-exports any such software from a foreign destination, Licensee shall 106 * ensure that the distribution and export/re-export of the software is in 107 * compliance with all laws, regulations, orders, or other restrictions of the 108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 109 * any of its subsidiaries will export/re-export any technical data, process, 110 * software, or service, directly or indirectly, to any country for which the 111 * United States government or any agency thereof requires an export license, 112 * other governmental approval, or letter of assurance, without first obtaining 113 * such license, approval or letter. 114 * 115 *****************************************************************************/ 116 117#define __PSARGS_C__ 118 119#include "acpi.h" 120#include "acparser.h" 121#include "amlcode.h" 122#include "acnamesp.h" 123 124#define _COMPONENT ACPI_PARSER 125 ACPI_MODULE_NAME ("psargs") 126 127 128/******************************************************************************* 129 * 130 * FUNCTION: AcpiPsGetNextPackageLength 131 * 132 * PARAMETERS: ParserState - Current parser state object 133 * 134 * RETURN: Decoded package length. On completion, the AML pointer points 135 * past the length byte or bytes. 136 * 137 * DESCRIPTION: Decode and return a package length field 138 * 139 ******************************************************************************/ 140 141UINT32 142AcpiPsGetNextPackageLength ( 143 ACPI_PARSE_STATE *ParserState) 144{ 145 UINT32 EncodedLength; 146 UINT32 Length = 0; 147 148 149 ACPI_FUNCTION_TRACE ("PsGetNextPackageLength"); 150 151 152 EncodedLength = (UINT32) ACPI_GET8 (ParserState->Aml); 153 ParserState->Aml++; 154 155 156 switch (EncodedLength >> 6) /* bits 6-7 contain encoding scheme */ 157 { 158 case 0: /* 1-byte encoding (bits 0-5) */ 159 160 Length = (EncodedLength & 0x3F); 161 break; 162 163 164 case 1: /* 2-byte encoding (next byte + bits 0-3) */ 165 166 Length = ((ACPI_GET8 (ParserState->Aml) << 04) | 167 (EncodedLength & 0x0F)); 168 ParserState->Aml++; 169 break; 170 171 172 case 2: /* 3-byte encoding (next 2 bytes + bits 0-3) */ 173 174 Length = ((ACPI_GET8 (ParserState->Aml + 1) << 12) | 175 (ACPI_GET8 (ParserState->Aml) << 04) | 176 (EncodedLength & 0x0F)); 177 ParserState->Aml += 2; 178 break; 179 180 181 case 3: /* 4-byte encoding (next 3 bytes + bits 0-3) */ 182 183 Length = ((ACPI_GET8 (ParserState->Aml + 2) << 20) | 184 (ACPI_GET8 (ParserState->Aml + 1) << 12) | 185 (ACPI_GET8 (ParserState->Aml) << 04) | 186 (EncodedLength & 0x0F)); 187 ParserState->Aml += 3; 188 break; 189 } 190 191 return_VALUE (Length); 192} 193 194 195/******************************************************************************* 196 * 197 * FUNCTION: AcpiPsGetNextPackageEnd 198 * 199 * PARAMETERS: ParserState - Current parser state object 200 * 201 * RETURN: Pointer to end-of-package +1 202 * 203 * DESCRIPTION: Get next package length and return a pointer past the end of 204 * the package. Consumes the package length field 205 * 206 ******************************************************************************/ 207 208UINT8 * 209AcpiPsGetNextPackageEnd ( 210 ACPI_PARSE_STATE *ParserState) 211{ 212 UINT8 *Start = ParserState->Aml; 213 NATIVE_UINT Length; 214 215 216 ACPI_FUNCTION_TRACE ("PsGetNextPackageEnd"); 217 218 219 Length = (NATIVE_UINT) AcpiPsGetNextPackageLength (ParserState); 220 221 return_PTR (Start + Length); /* end of package */ 222} 223 224 225/******************************************************************************* 226 * 227 * FUNCTION: AcpiPsGetNextNamestring 228 * 229 * PARAMETERS: ParserState - Current parser state object 230 * 231 * RETURN: Pointer to the start of the name string (pointer points into 232 * the AML. 233 * 234 * DESCRIPTION: Get next raw namestring within the AML stream. Handles all name 235 * prefix characters. Set parser state to point past the string. 236 * (Name is consumed from the AML.) 237 * 238 ******************************************************************************/ 239 240NATIVE_CHAR * 241AcpiPsGetNextNamestring ( 242 ACPI_PARSE_STATE *ParserState) 243{ 244 UINT8 *Start = ParserState->Aml; 245 UINT8 *End = ParserState->Aml; 246 UINT32 Length; 247 248 249 ACPI_FUNCTION_TRACE ("PsGetNextNamestring"); 250 251 252 /* Handle multiple prefix characters */ 253 254 while (AcpiPsIsPrefixChar (ACPI_GET8 (End))) 255 { 256 /* include prefix '\\' or '^' */ 257 258 End++; 259 } 260 261 /* Decode the path */ 262 263 switch (ACPI_GET8 (End)) 264 { 265 case 0: 266 267 /* NullName */ 268 269 if (End == Start) 270 { 271 Start = NULL; 272 } 273 End++; 274 break; 275 276 277 case AML_DUAL_NAME_PREFIX: 278 279 /* two name segments */ 280 281 End += 9; 282 break; 283 284 285 case AML_MULTI_NAME_PREFIX_OP: 286 287 /* multiple name segments */ 288 289 Length = (UINT32) ACPI_GET8 (End + 1) * 4; 290 End += 2 + Length; 291 break; 292 293 294 default: 295 296 /* single name segment */ 297 /* assert (AcpiPsIsLead (GET8 (End))); */ 298 299 End += 4; 300 break; 301 } 302 303 ParserState->Aml = (UINT8*) End; 304 305 return_PTR ((NATIVE_CHAR *) Start); 306} 307 308 309/******************************************************************************* 310 * 311 * FUNCTION: AcpiPsGetNextNamepath 312 * 313 * PARAMETERS: ParserState - Current parser state object 314 * Arg - Where the namepath will be stored 315 * ArgCount - If the namepath points to a control method 316 * the method's argument is returned here. 317 * MethodCall - Whether the namepath can be the start 318 * of a method call 319 * 320 * RETURN: None 321 * 322 * DESCRIPTION: Get next name (if method call, push appropriate # args). Names 323 * are looked up in either the parsed or internal namespace to 324 * determine if the name represents a control method. If a method 325 * is found, the number of arguments to the method is returned. 326 * This information is critical for parsing to continue correctly. 327 * 328 ******************************************************************************/ 329 330 331#ifdef PARSER_ONLY 332 333void 334AcpiPsGetNextNamepath ( 335 ACPI_PARSE_STATE *ParserState, 336 ACPI_PARSE_OBJECT *Arg, 337 UINT32 *ArgCount, 338 BOOLEAN MethodCall) 339{ 340 NATIVE_CHAR *Path; 341 ACPI_PARSE_OBJECT *NameOp; 342 ACPI_PARSE_OBJECT *Op; 343 ACPI_PARSE_OBJECT *Count; 344 345 346 ACPI_FUNCTION_TRACE ("PsGetNextNamepath"); 347 348 349 Path = AcpiPsGetNextNamestring (ParserState); 350 if (!Path || !MethodCall) 351 { 352 /* Null name case, create a null namepath object */ 353 354 AcpiPsInitOp (Arg, AML_INT_NAMEPATH_OP); 355 Arg->Value.Name = Path; 356 return_VOID; 357 } 358 359 360 if (AcpiGbl_ParsedNamespaceRoot) 361 { 362 /* 363 * Lookup the name in the parsed namespace 364 */ 365 Op = NULL; 366 if (MethodCall) 367 { 368 Op = AcpiPsFind (AcpiPsGetParentScope (ParserState), 369 Path, AML_METHOD_OP, 0); 370 } 371 372 if (Op) 373 { 374 if (Op->Opcode == AML_METHOD_OP) 375 { 376 /* 377 * The name refers to a control method, so this namepath is a 378 * method invocation. We need to 1) Get the number of arguments 379 * associated with this method, and 2) Change the NAMEPATH 380 * object into a METHODCALL object. 381 */ 382 Count = AcpiPsGetArg (Op, 0); 383 if (Count && Count->Opcode == AML_BYTE_OP) 384 { 385 NameOp = AcpiPsAllocOp (AML_INT_NAMEPATH_OP); 386 if (NameOp) 387 { 388 /* Change arg into a METHOD CALL and attach the name */ 389 390 AcpiPsInitOp (Arg, AML_INT_METHODCALL_OP); 391 392 NameOp->Value.Name = Path; 393 394 /* Point METHODCALL/NAME to the METHOD Node */ 395 396 NameOp->Node = (ACPI_NAMESPACE_NODE *) Op; 397 AcpiPsAppendArg (Arg, NameOp); 398 399 *ArgCount = (UINT32) Count->Value.Integer & 400 METHOD_FLAGS_ARG_COUNT; 401 } 402 } 403 404 return_VOID; 405 } 406 407 /* 408 * Else this is normal named object reference. 409 * Just init the NAMEPATH object with the pathname. 410 * (See code below) 411 */ 412 } 413 } 414 415 /* 416 * Either we didn't find the object in the namespace, or the object is 417 * something other than a control method. Just initialize the Op with the 418 * pathname 419 */ 420 AcpiPsInitOp (Arg, AML_INT_NAMEPATH_OP); 421 Arg->Value.Name = Path; 422 423 424 return_VOID; 425} 426 427 428#else 429 430 431void 432AcpiPsGetNextNamepath ( 433 ACPI_PARSE_STATE *ParserState, 434 ACPI_PARSE_OBJECT *Arg, 435 UINT32 *ArgCount, 436 BOOLEAN MethodCall) 437{ 438 NATIVE_CHAR *Path; 439 ACPI_PARSE_OBJECT *NameOp; 440 ACPI_STATUS Status; 441 ACPI_NAMESPACE_NODE *MethodNode = NULL; 442 ACPI_NAMESPACE_NODE *Node; 443 ACPI_GENERIC_STATE ScopeInfo; 444 445 446 ACPI_FUNCTION_TRACE ("PsGetNextNamepath"); 447 448 449 Path = AcpiPsGetNextNamestring (ParserState); 450 if (!Path || !MethodCall) 451 { 452 /* Null name case, create a null namepath object */ 453 454 AcpiPsInitOp (Arg, AML_INT_NAMEPATH_OP); 455 Arg->Value.Name = Path; 456 return_VOID; 457 } 458 459 460 if (MethodCall) 461 { 462 /* 463 * Lookup the name in the internal namespace 464 */ 465 ScopeInfo.Scope.Node = NULL; 466 Node = ParserState->StartNode; 467 if (Node) 468 { 469 ScopeInfo.Scope.Node = Node; 470 } 471 472 /* 473 * Lookup object. We don't want to add anything new to the namespace 474 * here, however. So we use MODE_EXECUTE. Allow searching of the 475 * parent tree, but don't open a new scope -- we just want to lookup the 476 * object (MUST BE mode EXECUTE to perform upsearch) 477 */ 478 Status = AcpiNsLookup (&ScopeInfo, Path, ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 479 ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL, 480 &Node); 481 if (ACPI_SUCCESS (Status)) 482 { 483 if (Node->Type == ACPI_TYPE_METHOD) 484 { 485 MethodNode = Node; 486 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "method - %p Path=%p\n", 487 MethodNode, Path)); 488 489 NameOp = AcpiPsAllocOp (AML_INT_NAMEPATH_OP); 490 if (NameOp) 491 { 492 /* Change arg into a METHOD CALL and attach name to it */ 493 494 AcpiPsInitOp (Arg, AML_INT_METHODCALL_OP); 495 496 NameOp->Value.Name = Path; 497 498 /* Point METHODCALL/NAME to the METHOD Node */ 499 500 NameOp->Node = MethodNode; 501 AcpiPsAppendArg (Arg, NameOp); 502 503 if (!AcpiNsGetAttachedObject (MethodNode)) 504 { 505 return_VOID; 506 } 507 508 *ArgCount = (AcpiNsGetAttachedObject (MethodNode))->Method.ParamCount; 509 } 510 511 return_VOID; 512 } 513 514 /* 515 * Else this is normal named object reference. 516 * Just init the NAMEPATH object with the pathname. 517 * (See code below) 518 */ 519 } 520 } 521 522 /* 523 * Either we didn't find the object in the namespace, or the object is 524 * something other than a control method. Just initialize the Op with the 525 * pathname. 526 */ 527 AcpiPsInitOp (Arg, AML_INT_NAMEPATH_OP); 528 Arg->Value.Name = Path; 529 530 531 return_VOID; 532} 533 534#endif 535 536/******************************************************************************* 537 * 538 * FUNCTION: AcpiPsGetNextSimpleArg 539 * 540 * PARAMETERS: ParserState - Current parser state object 541 * ArgType - The argument type (AML_*_ARG) 542 * Arg - Where the argument is returned 543 * 544 * RETURN: None 545 * 546 * DESCRIPTION: Get the next simple argument (constant, string, or namestring) 547 * 548 ******************************************************************************/ 549 550void 551AcpiPsGetNextSimpleArg ( 552 ACPI_PARSE_STATE *ParserState, 553 UINT32 ArgType, 554 ACPI_PARSE_OBJECT *Arg) 555{ 556 557 ACPI_FUNCTION_TRACE_U32 ("PsGetNextSimpleArg", ArgType); 558 559 560 switch (ArgType) 561 { 562 563 case ARGP_BYTEDATA: 564 565 AcpiPsInitOp (Arg, AML_BYTE_OP); 566 Arg->Value.Integer = (UINT32) ACPI_GET8 (ParserState->Aml); 567 ParserState->Aml++; 568 break; 569 570 571 case ARGP_WORDDATA: 572 573 AcpiPsInitOp (Arg, AML_WORD_OP); 574 575 /* Get 2 bytes from the AML stream */ 576 577 ACPI_MOVE_UNALIGNED16_TO_32 (&Arg->Value.Integer, ParserState->Aml); 578 ParserState->Aml += 2; 579 break; 580 581 582 case ARGP_DWORDDATA: 583 584 AcpiPsInitOp (Arg, AML_DWORD_OP); 585 586 /* Get 4 bytes from the AML stream */ 587 588 ACPI_MOVE_UNALIGNED32_TO_32 (&Arg->Value.Integer, ParserState->Aml); 589 ParserState->Aml += 4; 590 break; 591 592 593 case ARGP_QWORDDATA: 594 595 AcpiPsInitOp (Arg, AML_QWORD_OP); 596 597 /* Get 8 bytes from the AML stream */ 598 599 ACPI_MOVE_UNALIGNED64_TO_64 (&Arg->Value.Integer, ParserState->Aml); 600 ParserState->Aml += 8; 601 break; 602 603 604 case ARGP_CHARLIST: 605 606 AcpiPsInitOp (Arg, AML_STRING_OP); 607 Arg->Value.String = (char *) ParserState->Aml; 608 609 while (ACPI_GET8 (ParserState->Aml) != '\0') 610 { 611 ParserState->Aml++; 612 } 613 ParserState->Aml++; 614 break; 615 616 617 case ARGP_NAME: 618 case ARGP_NAMESTRING: 619 620 AcpiPsInitOp (Arg, AML_INT_NAMEPATH_OP); 621 Arg->Value.Name = AcpiPsGetNextNamestring (ParserState); 622 break; 623 } 624 625 return_VOID; 626} 627 628 629/******************************************************************************* 630 * 631 * FUNCTION: AcpiPsGetNextField 632 * 633 * PARAMETERS: ParserState - Current parser state object 634 * 635 * RETURN: A newly allocated FIELD op 636 * 637 * DESCRIPTION: Get next field (NamedField, ReservedField, or AccessField) 638 * 639 ******************************************************************************/ 640 641ACPI_PARSE_OBJECT * 642AcpiPsGetNextField ( 643 ACPI_PARSE_STATE *ParserState) 644{ 645 UINT32 AmlOffset = ParserState->Aml - 646 ParserState->AmlStart; 647 ACPI_PARSE_OBJECT *Field; 648 UINT16 Opcode; 649 UINT32 Name; 650 651 652 ACPI_FUNCTION_TRACE ("PsGetNextField"); 653 654 655 /* determine field type */ 656 657 switch (ACPI_GET8 (ParserState->Aml)) 658 { 659 660 default: 661 662 Opcode = AML_INT_NAMEDFIELD_OP; 663 break; 664 665 666 case 0x00: 667 668 Opcode = AML_INT_RESERVEDFIELD_OP; 669 ParserState->Aml++; 670 break; 671 672 673 case 0x01: 674 675 Opcode = AML_INT_ACCESSFIELD_OP; 676 ParserState->Aml++; 677 break; 678 } 679 680 681 /* Allocate a new field op */ 682 683 Field = AcpiPsAllocOp (Opcode); 684 if (Field) 685 { 686 Field->AmlOffset = AmlOffset; 687 688 /* Decode the field type */ 689 690 switch (Opcode) 691 { 692 case AML_INT_NAMEDFIELD_OP: 693 694 /* Get the 4-character name */ 695 696 ACPI_MOVE_UNALIGNED32_TO_32 (&Name, ParserState->Aml); 697 AcpiPsSetName (Field, Name); 698 ParserState->Aml += 4; 699 700 /* Get the length which is encoded as a package length */ 701 702 Field->Value.Size = AcpiPsGetNextPackageLength (ParserState); 703 break; 704 705 706 case AML_INT_RESERVEDFIELD_OP: 707 708 /* Get the length which is encoded as a package length */ 709 710 Field->Value.Size = AcpiPsGetNextPackageLength (ParserState); 711 break; 712 713 714 case AML_INT_ACCESSFIELD_OP: 715 716 /* 717 * Get AccessType and AccessAttrib and merge into the field Op 718 * AccessType is first operand, AccessAttribute is second 719 */ 720 Field->Value.Integer32 = (ACPI_GET8 (ParserState->Aml) << 8); 721 ParserState->Aml++; 722 Field->Value.Integer32 |= ACPI_GET8 (ParserState->Aml); 723 ParserState->Aml++; 724 break; 725 } 726 } 727 728 return_PTR (Field); 729} 730 731 732/******************************************************************************* 733 * 734 * FUNCTION: AcpiPsGetNextArg 735 * 736 * PARAMETERS: ParserState - Current parser state object 737 * ArgType - The argument type (AML_*_ARG) 738 * ArgCount - If the argument points to a control method 739 * the method's argument is returned here. 740 * 741 * RETURN: An op object containing the next argument. 742 * 743 * DESCRIPTION: Get next argument (including complex list arguments that require 744 * pushing the parser stack) 745 * 746 ******************************************************************************/ 747 748ACPI_PARSE_OBJECT * 749AcpiPsGetNextArg ( 750 ACPI_PARSE_STATE *ParserState, 751 UINT32 ArgType, 752 UINT32 *ArgCount) 753{ 754 ACPI_PARSE_OBJECT *Arg = NULL; 755 ACPI_PARSE_OBJECT *Prev = NULL; 756 ACPI_PARSE_OBJECT *Field; 757 UINT32 Subop; 758 759 760 ACPI_FUNCTION_TRACE_PTR ("PsGetNextArg", ParserState); 761 762 763 switch (ArgType) 764 { 765 case ARGP_BYTEDATA: 766 case ARGP_WORDDATA: 767 case ARGP_DWORDDATA: 768 case ARGP_CHARLIST: 769 case ARGP_NAME: 770 case ARGP_NAMESTRING: 771 772 /* constants, strings, and namestrings are all the same size */ 773 774 Arg = AcpiPsAllocOp (AML_BYTE_OP); 775 if (Arg) 776 { 777 AcpiPsGetNextSimpleArg (ParserState, ArgType, Arg); 778 } 779 break; 780 781 782 case ARGP_PKGLENGTH: 783 784 /* package length, nothing returned */ 785 786 ParserState->PkgEnd = AcpiPsGetNextPackageEnd (ParserState); 787 break; 788 789 790 case ARGP_FIELDLIST: 791 792 if (ParserState->Aml < ParserState->PkgEnd) 793 { 794 /* non-empty list */ 795 796 while (ParserState->Aml < ParserState->PkgEnd) 797 { 798 Field = AcpiPsGetNextField (ParserState); 799 if (!Field) 800 { 801 break; 802 } 803 804 if (Prev) 805 { 806 Prev->Next = Field; 807 } 808 809 else 810 { 811 Arg = Field; 812 } 813 814 Prev = Field; 815 } 816 817 /* skip to End of byte data */ 818 819 ParserState->Aml = ParserState->PkgEnd; 820 } 821 break; 822 823 824 case ARGP_BYTELIST: 825 826 if (ParserState->Aml < ParserState->PkgEnd) 827 { 828 /* non-empty list */ 829 830 Arg = AcpiPsAllocOp (AML_INT_BYTELIST_OP); 831 if (Arg) 832 { 833 /* fill in bytelist data */ 834 835 Arg->Value.Size = (ParserState->PkgEnd - ParserState->Aml); 836 ((ACPI_PARSE2_OBJECT *) Arg)->Data = ParserState->Aml; 837 } 838 839 /* skip to End of byte data */ 840 841 ParserState->Aml = ParserState->PkgEnd; 842 } 843 break; 844 845 846 case ARGP_TARGET: 847 case ARGP_SUPERNAME: 848 case ARGP_SIMPLENAME: 849 { 850 Subop = AcpiPsPeekOpcode (ParserState); 851 if (Subop == 0 || 852 AcpiPsIsLeadingChar (Subop) || 853 AcpiPsIsPrefixChar (Subop)) 854 { 855 /* NullName or NameString */ 856 857 Arg = AcpiPsAllocOp (AML_INT_NAMEPATH_OP); 858 if (Arg) 859 { 860 AcpiPsGetNextNamepath (ParserState, Arg, ArgCount, 0); 861 } 862 } 863 864 else 865 { 866 /* single complex argument, nothing returned */ 867 868 *ArgCount = 1; 869 } 870 } 871 break; 872 873 874 case ARGP_DATAOBJ: 875 case ARGP_TERMARG: 876 877 /* single complex argument, nothing returned */ 878 879 *ArgCount = 1; 880 break; 881 882 883 case ARGP_DATAOBJLIST: 884 case ARGP_TERMLIST: 885 case ARGP_OBJLIST: 886 887 if (ParserState->Aml < ParserState->PkgEnd) 888 { 889 /* non-empty list of variable arguments, nothing returned */ 890 891 *ArgCount = ACPI_VAR_ARGS; 892 } 893 break; 894 } 895 896 return_PTR (Arg); 897} 898