nsaccess.c revision 102550
1/******************************************************************************* 2 * 3 * Module Name: nsaccess - Top-level functions for accessing ACPI namespace 4 * $Revision: 161 $ 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 __NSACCESS_C__ 118 119#include "acpi.h" 120#include "amlcode.h" 121#include "acnamesp.h" 122#include "acdispat.h" 123 124 125#define _COMPONENT ACPI_NAMESPACE 126 ACPI_MODULE_NAME ("nsaccess") 127 128 129/******************************************************************************* 130 * 131 * FUNCTION: AcpiNsRootInitialize 132 * 133 * PARAMETERS: None 134 * 135 * RETURN: Status 136 * 137 * DESCRIPTION: Allocate and initialize the default root named objects 138 * 139 * MUTEX: Locks namespace for entire execution 140 * 141 ******************************************************************************/ 142 143ACPI_STATUS 144AcpiNsRootInitialize (void) 145{ 146 ACPI_STATUS Status; 147 const ACPI_PREDEFINED_NAMES *InitVal = NULL; 148 ACPI_NAMESPACE_NODE *NewNode; 149 ACPI_OPERAND_OBJECT *ObjDesc; 150 151 152 ACPI_FUNCTION_TRACE ("NsRootInitialize"); 153 154 155 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 156 if (ACPI_FAILURE (Status)) 157 { 158 return_ACPI_STATUS (Status); 159 } 160 161 /* 162 * The global root ptr is initially NULL, so a non-NULL value indicates 163 * that AcpiNsRootInitialize() has already been called; just return. 164 */ 165 if (AcpiGbl_RootNode) 166 { 167 Status = AE_OK; 168 goto UnlockAndExit; 169 } 170 171 /* 172 * Tell the rest of the subsystem that the root is initialized 173 * (This is OK because the namespace is locked) 174 */ 175 AcpiGbl_RootNode = &AcpiGbl_RootNodeStruct; 176 177 /* Enter the pre-defined names in the name table */ 178 179 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 180 "Entering predefined entries into namespace\n")); 181 182 for (InitVal = AcpiGbl_PreDefinedNames; InitVal->Name; InitVal++) 183 { 184 Status = AcpiNsLookup (NULL, InitVal->Name, InitVal->Type, 185 ACPI_IMODE_LOAD_PASS2, ACPI_NS_NO_UPSEARCH, NULL, &NewNode); 186 187 if (ACPI_FAILURE (Status) || (!NewNode)) /* Must be on same line for code converter */ 188 { 189 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 190 "Could not create predefined name %s, %s\n", 191 InitVal->Name, AcpiFormatException (Status))); 192 } 193 194 /* 195 * Name entered successfully. 196 * If entry in PreDefinedNames[] specifies an 197 * initial value, create the initial value. 198 */ 199 if (InitVal->Val) 200 { 201 /* 202 * Entry requests an initial value, allocate a 203 * descriptor for it. 204 */ 205 ObjDesc = AcpiUtCreateInternalObject (InitVal->Type); 206 if (!ObjDesc) 207 { 208 Status = AE_NO_MEMORY; 209 goto UnlockAndExit; 210 } 211 212 /* 213 * Convert value string from table entry to 214 * internal representation. Only types actually 215 * used for initial values are implemented here. 216 */ 217 switch (InitVal->Type) 218 { 219 case ACPI_TYPE_METHOD: 220 ObjDesc->Method.ParamCount = 221 (UINT8) ACPI_STRTOUL (InitVal->Val, NULL, 10); 222 ObjDesc->Common.Flags |= AOPOBJ_DATA_VALID; 223 224#if defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY) 225 226 /* Compiler cheats by putting parameter count in the OwnerID */ 227 228 NewNode->OwnerId = ObjDesc->Method.ParamCount; 229#endif 230 break; 231 232 case ACPI_TYPE_INTEGER: 233 234 ObjDesc->Integer.Value = 235 (ACPI_INTEGER) ACPI_STRTOUL (InitVal->Val, NULL, 10); 236 break; 237 238 239 case ACPI_TYPE_STRING: 240 241 /* 242 * Build an object around the static string 243 */ 244 ObjDesc->String.Length = ACPI_STRLEN (InitVal->Val); 245 ObjDesc->String.Pointer = InitVal->Val; 246 ObjDesc->Common.Flags |= AOPOBJ_STATIC_POINTER; 247 break; 248 249 250 case ACPI_TYPE_MUTEX: 251 252 ObjDesc->Mutex.SyncLevel = 253 (UINT16) ACPI_STRTOUL (InitVal->Val, NULL, 10); 254 255 if (ACPI_STRCMP (InitVal->Name, "_GL_") == 0) 256 { 257 /* 258 * Create a counting semaphore for the 259 * global lock 260 */ 261 Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT, 262 1, &ObjDesc->Mutex.Semaphore); 263 if (ACPI_FAILURE (Status)) 264 { 265 goto UnlockAndExit; 266 } 267 268 /* 269 * We just created the mutex for the 270 * global lock, save it 271 */ 272 AcpiGbl_GlobalLockSemaphore = ObjDesc->Mutex.Semaphore; 273 } 274 else 275 { 276 /* Create a mutex */ 277 278 Status = AcpiOsCreateSemaphore (1, 1, 279 &ObjDesc->Mutex.Semaphore); 280 if (ACPI_FAILURE (Status)) 281 { 282 goto UnlockAndExit; 283 } 284 } 285 break; 286 287 288 default: 289 ACPI_REPORT_ERROR (("Unsupported initial type value %X\n", 290 InitVal->Type)); 291 AcpiUtRemoveReference (ObjDesc); 292 ObjDesc = NULL; 293 continue; 294 } 295 296 /* Store pointer to value descriptor in the Node */ 297 298 Status = AcpiNsAttachObject (NewNode, ObjDesc, ACPI_GET_OBJECT_TYPE (ObjDesc)); 299 300 /* Remove local reference to the object */ 301 302 AcpiUtRemoveReference (ObjDesc); 303 } 304 } 305 306 307UnlockAndExit: 308 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 309 return_ACPI_STATUS (Status); 310} 311 312 313/******************************************************************************* 314 * 315 * FUNCTION: AcpiNsLookup 316 * 317 * PARAMETERS: PrefixNode - Search scope if name is not fully qualified 318 * Pathname - Search pathname, in internal format 319 * (as represented in the AML stream) 320 * Type - Type associated with name 321 * InterpreterMode - IMODE_LOAD_PASS2 => add name if not found 322 * Flags - Flags describing the search restrictions 323 * WalkState - Current state of the walk 324 * ReturnNode - Where the Node is placed (if found 325 * or created successfully) 326 * 327 * RETURN: Status 328 * 329 * DESCRIPTION: Find or enter the passed name in the name space. 330 * Log an error if name not found in Exec mode. 331 * 332 * MUTEX: Assumes namespace is locked. 333 * 334 ******************************************************************************/ 335 336ACPI_STATUS 337AcpiNsLookup ( 338 ACPI_GENERIC_STATE *ScopeInfo, 339 NATIVE_CHAR *Pathname, 340 ACPI_OBJECT_TYPE Type, 341 ACPI_INTERPRETER_MODE InterpreterMode, 342 UINT32 Flags, 343 ACPI_WALK_STATE *WalkState, 344 ACPI_NAMESPACE_NODE **ReturnNode) 345{ 346 ACPI_STATUS Status; 347 NATIVE_CHAR *Path = Pathname; 348 ACPI_NAMESPACE_NODE *PrefixNode; 349 ACPI_NAMESPACE_NODE *CurrentNode = NULL; 350 ACPI_NAMESPACE_NODE *ThisNode = NULL; 351 UINT32 NumSegments; 352 ACPI_NAME SimpleName; 353 ACPI_OBJECT_TYPE TypeToCheckFor; 354 ACPI_OBJECT_TYPE ThisSearchType; 355 UINT32 SearchParentFlag = ACPI_NS_SEARCH_PARENT; 356 UINT32 LocalFlags = Flags & ~(ACPI_NS_ERROR_IF_FOUND | 357 ACPI_NS_SEARCH_PARENT); 358 359 360 ACPI_FUNCTION_TRACE ("NsLookup"); 361 362 363 if (!ReturnNode) 364 { 365 return_ACPI_STATUS (AE_BAD_PARAMETER); 366 } 367 368 AcpiGbl_NsLookupCount++; 369 *ReturnNode = ACPI_ENTRY_NOT_FOUND; 370 371 if (!AcpiGbl_RootNode) 372 { 373 return_ACPI_STATUS (AE_NO_NAMESPACE); 374 } 375 376 /* 377 * Get the prefix scope. 378 * A null scope means use the root scope 379 */ 380 if ((!ScopeInfo) || 381 (!ScopeInfo->Scope.Node)) 382 { 383 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 384 "Null scope prefix, using root node (%p)\n", 385 AcpiGbl_RootNode)); 386 387 PrefixNode = AcpiGbl_RootNode; 388 } 389 else 390 { 391 PrefixNode = ScopeInfo->Scope.Node; 392 if (ACPI_GET_DESCRIPTOR_TYPE (PrefixNode) != ACPI_DESC_TYPE_NAMED) 393 { 394 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "[%p] Not a namespace node\n", 395 PrefixNode)); 396 return_ACPI_STATUS (AE_AML_INTERNAL); 397 } 398 399 /* 400 * This node might not be a actual "scope" node (such as a 401 * Device/Method, etc.) It could be a Package or other object node. 402 * Backup up the tree to find the containing scope node. 403 */ 404 while (!AcpiNsOpensScope (PrefixNode->Type) && 405 PrefixNode->Type != ACPI_TYPE_ANY) 406 { 407 PrefixNode = AcpiNsGetParentNode (PrefixNode); 408 } 409 } 410 411 /* 412 * This check is explicitly split to relax the TypeToCheckFor 413 * conditions for BankFieldDefn. Originally, both BankFieldDefn and 414 * DefFieldDefn caused TypeToCheckFor to be set to ACPI_TYPE_REGION, 415 * but the BankFieldDefn may also check for a Field definition as well 416 * as an OperationRegion. 417 */ 418 if (INTERNAL_TYPE_FIELD_DEFN == Type) 419 { 420 /* DefFieldDefn defines fields in a Region */ 421 422 TypeToCheckFor = ACPI_TYPE_REGION; 423 } 424 else if (INTERNAL_TYPE_BANK_FIELD_DEFN == Type) 425 { 426 /* BankFieldDefn defines data fields in a Field Object */ 427 428 TypeToCheckFor = ACPI_TYPE_ANY; 429 } 430 else 431 { 432 TypeToCheckFor = Type; 433 } 434 435 /* 436 * Begin examination of the actual pathname 437 */ 438 if (!Pathname) 439 { 440 /* A Null NamePath is allowed and refers to the root */ 441 442 NumSegments = 0; 443 ThisNode = AcpiGbl_RootNode; 444 Path = ""; 445 446 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 447 "Null Pathname (Zero segments), Flags=%X\n", Flags)); 448 } 449 else 450 { 451 /* 452 * Name pointer is valid (and must be in internal name format) 453 * 454 * Check for scope prefixes: 455 * 456 * As represented in the AML stream, a namepath consists of an 457 * optional scope prefix followed by a name segment part. 458 * 459 * If present, the scope prefix is either a Root Prefix (in 460 * which case the name is fully qualified), or one or more 461 * Parent Prefixes (in which case the name's scope is relative 462 * to the current scope). 463 */ 464 if (*Path == (UINT8) AML_ROOT_PREFIX) 465 { 466 /* Pathname is fully qualified, start from the root */ 467 468 ThisNode = AcpiGbl_RootNode; 469 SearchParentFlag = ACPI_NS_NO_UPSEARCH; 470 471 /* Point to name segment part */ 472 473 Path++; 474 475 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 476 "Path is absolute from root [%p]\n", ThisNode)); 477 } 478 else 479 { 480 /* Pathname is relative to current scope, start there */ 481 482 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 483 "Searching relative to prefix scope [%p]\n", 484 PrefixNode)); 485 486 /* 487 * Handle multiple Parent Prefixes (carat) by just getting 488 * the parent node for each prefix instance. 489 */ 490 ThisNode = PrefixNode; 491 while (*Path == (UINT8) AML_PARENT_PREFIX) 492 { 493 /* Name is fully qualified, no search rules apply */ 494 495 SearchParentFlag = ACPI_NS_NO_UPSEARCH; 496 /* 497 * Point past this prefix to the name segment 498 * part or the next Parent Prefix 499 */ 500 Path++; 501 502 /* Backup to the parent node */ 503 504 ThisNode = AcpiNsGetParentNode (ThisNode); 505 if (!ThisNode) 506 { 507 /* Current scope has no parent scope */ 508 509 ACPI_REPORT_ERROR ( 510 ("ACPI path has too many parent prefixes (^) - reached beyond root node\n")); 511 return_ACPI_STATUS (AE_NOT_FOUND); 512 } 513 } 514 515 if (SearchParentFlag == ACPI_NS_NO_UPSEARCH) 516 { 517 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 518 "Path is absolute with one or more carats\n")); 519 } 520 } 521 522 /* 523 * Determine the number of ACPI name segments in this pathname. 524 * 525 * The segment part consists of either: 526 * - A Null name segment (0) 527 * - A DualNamePrefix followed by two 4-byte name segments 528 * - A MultiNamePrefix followed by a byte indicating the 529 * number of segments and the segments themselves. 530 * - A single 4-byte name segment 531 * 532 * Examine the name prefix opcode, if any, to determine the number of 533 * segments. 534 */ 535 switch (*Path) 536 { 537 case 0: 538 /* 539 * Null name after a root or parent prefixes. We already 540 * have the correct target node and there are no name segments. 541 */ 542 NumSegments = 0; 543 544 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 545 "Prefix-only Pathname (Zero name segments), Flags=%X\n", Flags)); 546 break; 547 548 case AML_DUAL_NAME_PREFIX: 549 550 /* More than one NameSeg, search rules do not apply */ 551 552 SearchParentFlag = ACPI_NS_NO_UPSEARCH; 553 554 /* Two segments, point to first name segment */ 555 556 NumSegments = 2; 557 Path++; 558 559 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 560 "Dual Pathname (2 segments, Flags=%X)\n", Flags)); 561 break; 562 563 case AML_MULTI_NAME_PREFIX_OP: 564 565 /* More than one NameSeg, search rules do not apply */ 566 567 SearchParentFlag = ACPI_NS_NO_UPSEARCH; 568 569 /* Extract segment count, point to first name segment */ 570 571 Path++; 572 NumSegments = (UINT32) (UINT8) *Path; 573 Path++; 574 575 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 576 "Multi Pathname (%d Segments, Flags=%X) \n", 577 NumSegments, Flags)); 578 break; 579 580 default: 581 /* 582 * Not a Null name, no Dual or Multi prefix, hence there is 583 * only one name segment and Pathname is already pointing to it. 584 */ 585 NumSegments = 1; 586 587 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 588 "Simple Pathname (1 segment, Flags=%X)\n", Flags)); 589 break; 590 } 591 592 ACPI_DEBUG_EXEC (AcpiNsPrintPathname (NumSegments, Path)); 593 } 594 595 596 /* 597 * Search namespace for each segment of the name. Loop through and 598 * verify (or add to the namespace) each name segment. 599 * 600 * The object type is significant only at the last name 601 * segment. (We don't care about the types along the path, only 602 * the type of the final target object.) 603 */ 604 ThisSearchType = ACPI_TYPE_ANY; 605 CurrentNode = ThisNode; 606 while (NumSegments && CurrentNode) 607 { 608 NumSegments--; 609 if (!NumSegments) 610 { 611 /* 612 * This is the last segment, enable typechecking 613 */ 614 ThisSearchType = Type; 615 616 /* 617 * Only allow automatic parent search (search rules) if the caller 618 * requested it AND we have a single, non-fully-qualified NameSeg 619 */ 620 if ((SearchParentFlag != ACPI_NS_NO_UPSEARCH) && 621 (Flags & ACPI_NS_SEARCH_PARENT)) 622 { 623 LocalFlags |= ACPI_NS_SEARCH_PARENT; 624 } 625 626 /* Set error flag according to caller */ 627 628 if (Flags & ACPI_NS_ERROR_IF_FOUND) 629 { 630 LocalFlags |= ACPI_NS_ERROR_IF_FOUND; 631 } 632 } 633 634 /* Extract one ACPI name from the front of the pathname */ 635 636 ACPI_MOVE_UNALIGNED32_TO_32 (&SimpleName, Path); 637 638 /* Try to find the single (4 character) ACPI name */ 639 640 Status = AcpiNsSearchAndEnter (SimpleName, WalkState, CurrentNode, 641 InterpreterMode, ThisSearchType, LocalFlags, &ThisNode); 642 if (ACPI_FAILURE (Status)) 643 { 644 if (Status == AE_NOT_FOUND) 645 { 646 /* Name not found in ACPI namespace */ 647 648 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 649 "Name [%4.4s] not found in scope [%4.4s] %p\n", 650 (char *) &SimpleName, (char *) &CurrentNode->Name, 651 CurrentNode)); 652 } 653 654 return_ACPI_STATUS (Status); 655 } 656 657 /* 658 * Sanity typecheck of the target object: 659 * 660 * If 1) This is the last segment (NumSegments == 0) 661 * 2) And we are looking for a specific type 662 * (Not checking for TYPE_ANY) 663 * 3) Which is not an alias 664 * 4) Which is not a local type (TYPE_DEF_ANY) 665 * 5) Which is not a local type (TYPE_SCOPE) 666 * 6) Which is not a local type (TYPE_INDEX_FIELD_DEFN) 667 * 7) And the type of target object is known (not TYPE_ANY) 668 * 8) And target object does not match what we are looking for 669 * 670 * Then we have a type mismatch. Just warn and ignore it. 671 */ 672 if ((NumSegments == 0) && 673 (TypeToCheckFor != ACPI_TYPE_ANY) && 674 (TypeToCheckFor != INTERNAL_TYPE_ALIAS) && 675 (TypeToCheckFor != INTERNAL_TYPE_DEF_ANY) && 676 (TypeToCheckFor != INTERNAL_TYPE_SCOPE) && 677 (TypeToCheckFor != INTERNAL_TYPE_INDEX_FIELD_DEFN) && 678 (ThisNode->Type != ACPI_TYPE_ANY) && 679 (ThisNode->Type != TypeToCheckFor)) 680 { 681 /* Complain about a type mismatch */ 682 683 ACPI_REPORT_WARNING ( 684 ("NsLookup: %4.4s, type %X, checking for type %X\n", 685 (char *) &SimpleName, ThisNode->Type, TypeToCheckFor)); 686 } 687 688 /* 689 * If this is the last name segment and we are not looking for a 690 * specific type, but the type of found object is known, use that type 691 * to see if it opens a scope. 692 */ 693 if ((NumSegments == 0) && (Type == ACPI_TYPE_ANY)) 694 { 695 Type = ThisNode->Type; 696 } 697 698 /* Point to next name segment and make this node current */ 699 700 Path += ACPI_NAME_SIZE; 701 CurrentNode = ThisNode; 702 } 703 704 /* 705 * Always check if we need to open a new scope 706 */ 707 if (!(Flags & ACPI_NS_DONT_OPEN_SCOPE) && (WalkState)) 708 { 709 /* 710 * If entry is a type which opens a scope, push the new scope on the 711 * scope stack. 712 */ 713 if (AcpiNsOpensScope (TypeToCheckFor)) 714 { 715 Status = AcpiDsScopeStackPush (ThisNode, Type, WalkState); 716 if (ACPI_FAILURE (Status)) 717 { 718 return_ACPI_STATUS (Status); 719 } 720 721 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 722 "Setting current scope to [%4.4s] (%p)\n", 723 ThisNode->Name.Ascii, ThisNode)); 724 } 725 } 726 727 *ReturnNode = ThisNode; 728 return_ACPI_STATUS (AE_OK); 729} 730 731