nsaccess.c revision 107325
1/******************************************************************************* 2 * 3 * Module Name: nsaccess - Top-level functions for accessing ACPI namespace 4 * $Revision: 165 $ 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 = (UINT32) 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.Node = NewNode; 253 ObjDesc->Mutex.SyncLevel = 254 (UINT16) ACPI_STRTOUL (InitVal->Val, NULL, 10); 255 256 if (ACPI_STRCMP (InitVal->Name, "_GL_") == 0) 257 { 258 /* 259 * Create a counting semaphore for the 260 * global lock 261 */ 262 Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT, 263 1, &ObjDesc->Mutex.Semaphore); 264 if (ACPI_FAILURE (Status)) 265 { 266 goto UnlockAndExit; 267 } 268 269 /* 270 * We just created the mutex for the 271 * global lock, save it 272 */ 273 AcpiGbl_GlobalLockSemaphore = ObjDesc->Mutex.Semaphore; 274 } 275 else 276 { 277 /* Create a mutex */ 278 279 Status = AcpiOsCreateSemaphore (1, 1, 280 &ObjDesc->Mutex.Semaphore); 281 if (ACPI_FAILURE (Status)) 282 { 283 goto UnlockAndExit; 284 } 285 } 286 break; 287 288 289 default: 290 ACPI_REPORT_ERROR (("Unsupported initial type value %X\n", 291 InitVal->Type)); 292 AcpiUtRemoveReference (ObjDesc); 293 ObjDesc = NULL; 294 continue; 295 } 296 297 /* Store pointer to value descriptor in the Node */ 298 299 Status = AcpiNsAttachObject (NewNode, ObjDesc, ACPI_GET_OBJECT_TYPE (ObjDesc)); 300 301 /* Remove local reference to the object */ 302 303 AcpiUtRemoveReference (ObjDesc); 304 } 305 } 306 307 308UnlockAndExit: 309 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 310 return_ACPI_STATUS (Status); 311} 312 313 314/******************************************************************************* 315 * 316 * FUNCTION: AcpiNsLookup 317 * 318 * PARAMETERS: PrefixNode - Search scope if name is not fully qualified 319 * Pathname - Search pathname, in internal format 320 * (as represented in the AML stream) 321 * Type - Type associated with name 322 * InterpreterMode - IMODE_LOAD_PASS2 => add name if not found 323 * Flags - Flags describing the search restrictions 324 * WalkState - Current state of the walk 325 * ReturnNode - Where the Node is placed (if found 326 * or created successfully) 327 * 328 * RETURN: Status 329 * 330 * DESCRIPTION: Find or enter the passed name in the name space. 331 * Log an error if name not found in Exec mode. 332 * 333 * MUTEX: Assumes namespace is locked. 334 * 335 ******************************************************************************/ 336 337ACPI_STATUS 338AcpiNsLookup ( 339 ACPI_GENERIC_STATE *ScopeInfo, 340 NATIVE_CHAR *Pathname, 341 ACPI_OBJECT_TYPE Type, 342 ACPI_INTERPRETER_MODE InterpreterMode, 343 UINT32 Flags, 344 ACPI_WALK_STATE *WalkState, 345 ACPI_NAMESPACE_NODE **ReturnNode) 346{ 347 ACPI_STATUS Status; 348 NATIVE_CHAR *Path = Pathname; 349 ACPI_NAMESPACE_NODE *PrefixNode; 350 ACPI_NAMESPACE_NODE *CurrentNode = NULL; 351 ACPI_NAMESPACE_NODE *ThisNode = NULL; 352 UINT32 NumSegments; 353 UINT32 NumCarats; 354 ACPI_NAME SimpleName; 355 ACPI_OBJECT_TYPE TypeToCheckFor; 356 ACPI_OBJECT_TYPE ThisSearchType; 357 UINT32 SearchParentFlag = ACPI_NS_SEARCH_PARENT; 358 UINT32 LocalFlags = Flags & ~(ACPI_NS_ERROR_IF_FOUND | 359 ACPI_NS_SEARCH_PARENT); 360 361 362 ACPI_FUNCTION_TRACE ("NsLookup"); 363 364 365 if (!ReturnNode) 366 { 367 return_ACPI_STATUS (AE_BAD_PARAMETER); 368 } 369 370 AcpiGbl_NsLookupCount++; 371 *ReturnNode = ACPI_ENTRY_NOT_FOUND; 372 373 if (!AcpiGbl_RootNode) 374 { 375 return_ACPI_STATUS (AE_NO_NAMESPACE); 376 } 377 378 /* 379 * Get the prefix scope. 380 * A null scope means use the root scope 381 */ 382 if ((!ScopeInfo) || 383 (!ScopeInfo->Scope.Node)) 384 { 385 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 386 "Null scope prefix, using root node (%p)\n", 387 AcpiGbl_RootNode)); 388 389 PrefixNode = AcpiGbl_RootNode; 390 } 391 else 392 { 393 PrefixNode = ScopeInfo->Scope.Node; 394 if (ACPI_GET_DESCRIPTOR_TYPE (PrefixNode) != ACPI_DESC_TYPE_NAMED) 395 { 396 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "[%p] Not a namespace node\n", 397 PrefixNode)); 398 return_ACPI_STATUS (AE_AML_INTERNAL); 399 } 400 401 /* 402 * This node might not be a actual "scope" node (such as a 403 * Device/Method, etc.) It could be a Package or other object node. 404 * Backup up the tree to find the containing scope node. 405 */ 406 while (!AcpiNsOpensScope (PrefixNode->Type) && 407 PrefixNode->Type != ACPI_TYPE_ANY) 408 { 409 PrefixNode = AcpiNsGetParentNode (PrefixNode); 410 } 411 } 412 413 /* Save type TBD: may be no longer necessary */ 414 415 TypeToCheckFor = Type; 416 417 /* 418 * Begin examination of the actual pathname 419 */ 420 if (!Pathname) 421 { 422 /* A Null NamePath is allowed and refers to the root */ 423 424 NumSegments = 0; 425 ThisNode = AcpiGbl_RootNode; 426 Path = ""; 427 428 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 429 "Null Pathname (Zero segments), Flags=%X\n", Flags)); 430 } 431 else 432 { 433 /* 434 * Name pointer is valid (and must be in internal name format) 435 * 436 * Check for scope prefixes: 437 * 438 * As represented in the AML stream, a namepath consists of an 439 * optional scope prefix followed by a name segment part. 440 * 441 * If present, the scope prefix is either a Root Prefix (in 442 * which case the name is fully qualified), or one or more 443 * Parent Prefixes (in which case the name's scope is relative 444 * to the current scope). 445 */ 446 if (*Path == (UINT8) AML_ROOT_PREFIX) 447 { 448 /* Pathname is fully qualified, start from the root */ 449 450 ThisNode = AcpiGbl_RootNode; 451 SearchParentFlag = ACPI_NS_NO_UPSEARCH; 452 453 /* Point to name segment part */ 454 455 Path++; 456 457 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 458 "Path is absolute from root [%p]\n", ThisNode)); 459 } 460 else 461 { 462 /* Pathname is relative to current scope, start there */ 463 464 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 465 "Searching relative to prefix scope [%4.4s] (%p)\n", 466 PrefixNode->Name.Ascii, PrefixNode)); 467 468 /* 469 * Handle multiple Parent Prefixes (carat) by just getting 470 * the parent node for each prefix instance. 471 */ 472 ThisNode = PrefixNode; 473 NumCarats = 0; 474 while (*Path == (UINT8) AML_PARENT_PREFIX) 475 { 476 /* Name is fully qualified, no search rules apply */ 477 478 SearchParentFlag = ACPI_NS_NO_UPSEARCH; 479 /* 480 * Point past this prefix to the name segment 481 * part or the next Parent Prefix 482 */ 483 Path++; 484 485 /* Backup to the parent node */ 486 487 NumCarats++; 488 ThisNode = AcpiNsGetParentNode (ThisNode); 489 if (!ThisNode) 490 { 491 /* Current scope has no parent scope */ 492 493 ACPI_REPORT_ERROR ( 494 ("ACPI path has too many parent prefixes (^) - reached beyond root node\n")); 495 return_ACPI_STATUS (AE_NOT_FOUND); 496 } 497 } 498 499 if (SearchParentFlag == ACPI_NS_NO_UPSEARCH) 500 { 501 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 502 "Search scope is [%4.4s], path has %d carat(s)\n", 503 ThisNode->Name.Ascii, NumCarats)); 504 } 505 } 506 507 /* 508 * Determine the number of ACPI name segments in this pathname. 509 * 510 * The segment part consists of either: 511 * - A Null name segment (0) 512 * - A DualNamePrefix followed by two 4-byte name segments 513 * - A MultiNamePrefix followed by a byte indicating the 514 * number of segments and the segments themselves. 515 * - A single 4-byte name segment 516 * 517 * Examine the name prefix opcode, if any, to determine the number of 518 * segments. 519 */ 520 switch (*Path) 521 { 522 case 0: 523 /* 524 * Null name after a root or parent prefixes. We already 525 * have the correct target node and there are no name segments. 526 */ 527 NumSegments = 0; 528 Type = ThisNode->Type; 529 530 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 531 "Prefix-only Pathname (Zero name segments), Flags=%X\n", Flags)); 532 break; 533 534 case AML_DUAL_NAME_PREFIX: 535 536 /* More than one NameSeg, search rules do not apply */ 537 538 SearchParentFlag = ACPI_NS_NO_UPSEARCH; 539 540 /* Two segments, point to first name segment */ 541 542 NumSegments = 2; 543 Path++; 544 545 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 546 "Dual Pathname (2 segments, Flags=%X)\n", Flags)); 547 break; 548 549 case AML_MULTI_NAME_PREFIX_OP: 550 551 /* More than one NameSeg, search rules do not apply */ 552 553 SearchParentFlag = ACPI_NS_NO_UPSEARCH; 554 555 /* Extract segment count, point to first name segment */ 556 557 Path++; 558 NumSegments = (UINT32) (UINT8) *Path; 559 Path++; 560 561 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 562 "Multi Pathname (%d Segments, Flags=%X) \n", 563 NumSegments, Flags)); 564 break; 565 566 default: 567 /* 568 * Not a Null name, no Dual or Multi prefix, hence there is 569 * only one name segment and Pathname is already pointing to it. 570 */ 571 NumSegments = 1; 572 573 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 574 "Simple Pathname (1 segment, Flags=%X)\n", Flags)); 575 break; 576 } 577 578 ACPI_DEBUG_EXEC (AcpiNsPrintPathname (NumSegments, Path)); 579 } 580 581 582 /* 583 * Search namespace for each segment of the name. Loop through and 584 * verify (or add to the namespace) each name segment. 585 * 586 * The object type is significant only at the last name 587 * segment. (We don't care about the types along the path, only 588 * the type of the final target object.) 589 */ 590 ThisSearchType = ACPI_TYPE_ANY; 591 CurrentNode = ThisNode; 592 while (NumSegments && CurrentNode) 593 { 594 NumSegments--; 595 if (!NumSegments) 596 { 597 /* 598 * This is the last segment, enable typechecking 599 */ 600 ThisSearchType = Type; 601 602 /* 603 * Only allow automatic parent search (search rules) if the caller 604 * requested it AND we have a single, non-fully-qualified NameSeg 605 */ 606 if ((SearchParentFlag != ACPI_NS_NO_UPSEARCH) && 607 (Flags & ACPI_NS_SEARCH_PARENT)) 608 { 609 LocalFlags |= ACPI_NS_SEARCH_PARENT; 610 } 611 612 /* Set error flag according to caller */ 613 614 if (Flags & ACPI_NS_ERROR_IF_FOUND) 615 { 616 LocalFlags |= ACPI_NS_ERROR_IF_FOUND; 617 } 618 } 619 620 /* Extract one ACPI name from the front of the pathname */ 621 622 ACPI_MOVE_UNALIGNED32_TO_32 (&SimpleName, Path); 623 624 /* Try to find the single (4 character) ACPI name */ 625 626 Status = AcpiNsSearchAndEnter (SimpleName, WalkState, CurrentNode, 627 InterpreterMode, ThisSearchType, LocalFlags, &ThisNode); 628 if (ACPI_FAILURE (Status)) 629 { 630 if (Status == AE_NOT_FOUND) 631 { 632 /* Name not found in ACPI namespace */ 633 634 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 635 "Name [%4.4s] not found in scope [%4.4s] %p\n", 636 (char *) &SimpleName, (char *) &CurrentNode->Name, 637 CurrentNode)); 638 } 639 640 *ReturnNode = ThisNode; 641 return_ACPI_STATUS (Status); 642 } 643 644 /* 645 * Sanity typecheck of the target object: 646 * 647 * If 1) This is the last segment (NumSegments == 0) 648 * 2) And we are looking for a specific type 649 * (Not checking for TYPE_ANY) 650 * 3) Which is not an alias 651 * 4) Which is not a local type (TYPE_SCOPE) 652 * 5) And the type of target object is known (not TYPE_ANY) 653 * 6) And target object does not match what we are looking for 654 * 655 * Then we have a type mismatch. Just warn and ignore it. 656 */ 657 if ((NumSegments == 0) && 658 (TypeToCheckFor != ACPI_TYPE_ANY) && 659 (TypeToCheckFor != ACPI_TYPE_LOCAL_ALIAS) && 660 (TypeToCheckFor != ACPI_TYPE_LOCAL_SCOPE) && 661 (ThisNode->Type != ACPI_TYPE_ANY) && 662 (ThisNode->Type != TypeToCheckFor)) 663 { 664 /* Complain about a type mismatch */ 665 666 ACPI_REPORT_WARNING ( 667 ("NsLookup: Type mismatch on %4.4s (%s), searching for (%s)\n", 668 (char *) &SimpleName, AcpiUtGetTypeName (ThisNode->Type), 669 AcpiUtGetTypeName (TypeToCheckFor))); 670 } 671 672 /* 673 * If this is the last name segment and we are not looking for a 674 * specific type, but the type of found object is known, use that type 675 * to see if it opens a scope. 676 */ 677 if ((NumSegments == 0) && (Type == ACPI_TYPE_ANY)) 678 { 679 Type = ThisNode->Type; 680 } 681 682 /* Point to next name segment and make this node current */ 683 684 Path += ACPI_NAME_SIZE; 685 CurrentNode = ThisNode; 686 } 687 688 /* 689 * Always check if we need to open a new scope 690 */ 691 if (!(Flags & ACPI_NS_DONT_OPEN_SCOPE) && (WalkState)) 692 { 693 /* 694 * If entry is a type which opens a scope, push the new scope on the 695 * scope stack. 696 */ 697 if (AcpiNsOpensScope (Type)) 698 { 699 Status = AcpiDsScopeStackPush (ThisNode, Type, WalkState); 700 if (ACPI_FAILURE (Status)) 701 { 702 return_ACPI_STATUS (Status); 703 } 704 } 705 } 706 707 *ReturnNode = ThisNode; 708 return_ACPI_STATUS (AE_OK); 709} 710 711