nsaccess.c revision 85756
1/******************************************************************************* 2 * 3 * Module Name: nsaccess - Top-level functions for accessing ACPI namespace 4 * $Revision: 135 $ 5 * 6 ******************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999, 2000, 2001, 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 "acinterp.h" 122#include "acnamesp.h" 123#include "acdispat.h" 124 125 126#define _COMPONENT ACPI_NAMESPACE 127 MODULE_NAME ("nsaccess") 128 129 130/******************************************************************************* 131 * 132 * FUNCTION: AcpiNsRootInitialize 133 * 134 * PARAMETERS: None 135 * 136 * RETURN: Status 137 * 138 * DESCRIPTION: Allocate and initialize the default root named objects 139 * 140 * MUTEX: Locks namespace for entire execution 141 * 142 ******************************************************************************/ 143 144ACPI_STATUS 145AcpiNsRootInitialize (void) 146{ 147 ACPI_STATUS Status = AE_OK; 148 const PREDEFINED_NAMES *InitVal = NULL; 149 ACPI_NAMESPACE_NODE *NewNode; 150 ACPI_OPERAND_OBJECT *ObjDesc; 151 152 153 FUNCTION_TRACE ("NsRootInitialize"); 154 155 156 AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 157 158 /* 159 * The global root ptr is initially NULL, so a non-NULL value indicates 160 * that AcpiNsRootInitialize() has already been called; just return. 161 */ 162 if (AcpiGbl_RootNode) 163 { 164 Status = AE_OK; 165 goto UnlockAndExit; 166 } 167 168 169 /* 170 * Tell the rest of the subsystem that the root is initialized 171 * (This is OK because the namespace is locked) 172 */ 173 AcpiGbl_RootNode = &AcpiGbl_RootNodeStruct; 174 175 176 /* Enter the pre-defined names in the name table */ 177 178 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Entering predefined entries into namespace\n")); 179 180 for (InitVal = AcpiGbl_PreDefinedNames; InitVal->Name; InitVal++) 181 { 182 Status = AcpiNsLookup (NULL, InitVal->Name, InitVal->Type, 183 IMODE_LOAD_PASS2, NS_NO_UPSEARCH, 184 NULL, &NewNode); 185 186 if (ACPI_FAILURE (Status) || (!NewNode)) /* Must be on same line for code converter */ 187 { 188 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 189 "Could not create predefined name %s, %s\n", 190 InitVal->Name, AcpiFormatException (Status))); 191 } 192 193 /* 194 * Name entered successfully. 195 * If entry in PreDefinedNames[] specifies an 196 * initial value, create the initial value. 197 */ 198 if (InitVal->Val) 199 { 200 /* 201 * Entry requests an initial value, allocate a 202 * descriptor for it. 203 */ 204 ObjDesc = AcpiUtCreateInternalObject (InitVal->Type); 205 if (!ObjDesc) 206 { 207 Status = AE_NO_MEMORY; 208 goto UnlockAndExit; 209 } 210 211 /* 212 * Convert value string from table entry to 213 * internal representation. Only types actually 214 * used for initial values are implemented here. 215 */ 216 217 switch (InitVal->Type) 218 { 219 220 case ACPI_TYPE_INTEGER: 221 222 ObjDesc->Integer.Value = 223 (ACPI_INTEGER) STRTOUL (InitVal->Val, NULL, 10); 224 break; 225 226 227 case ACPI_TYPE_STRING: 228 229 /* 230 * Build an object around the static string 231 */ 232 ObjDesc->String.Length = STRLEN (InitVal->Val); 233 ObjDesc->String.Pointer = InitVal->Val; 234 ObjDesc->Common.Flags |= AOPOBJ_STATIC_POINTER; 235 break; 236 237 238 case ACPI_TYPE_MUTEX: 239 240 ObjDesc->Mutex.SyncLevel = 241 (UINT16) STRTOUL (InitVal->Val, NULL, 10); 242 243 if (STRCMP (InitVal->Name, "_GL_") == 0) 244 { 245 /* 246 * Create a counting semaphore for the 247 * global lock 248 */ 249 Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT, 250 1, &ObjDesc->Mutex.Semaphore); 251 252 if (ACPI_FAILURE (Status)) 253 { 254 goto UnlockAndExit; 255 } 256 257 /* 258 * We just created the mutex for the 259 * global lock, save it 260 */ 261 AcpiGbl_GlobalLockSemaphore = ObjDesc->Mutex.Semaphore; 262 } 263 264 else 265 { 266 /* Create a mutex */ 267 268 Status = AcpiOsCreateSemaphore (1, 1, 269 &ObjDesc->Mutex.Semaphore); 270 271 if (ACPI_FAILURE (Status)) 272 { 273 goto UnlockAndExit; 274 } 275 } 276 break; 277 278 279 default: 280 REPORT_ERROR (("Unsupported initial type value %X\n", 281 InitVal->Type)); 282 AcpiUtRemoveReference (ObjDesc); 283 ObjDesc = NULL; 284 continue; 285 } 286 287 /* Store pointer to value descriptor in the Node */ 288 289 AcpiNsAttachObject (NewNode, ObjDesc, ObjDesc->Common.Type); 290 291 /* Remove local reference to the object */ 292 293 AcpiUtRemoveReference (ObjDesc); 294 } 295 } 296 297 298UnlockAndExit: 299 AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 300 return_ACPI_STATUS (Status); 301} 302 303 304/******************************************************************************* 305 * 306 * FUNCTION: AcpiNsLookup 307 * 308 * PARAMETERS: PrefixNode - Search scope if name is not fully qualified 309 * Pathname - Search pathname, in internal format 310 * (as represented in the AML stream) 311 * Type - Type associated with name 312 * InterpreterMode - IMODE_LOAD_PASS2 => add name if not found 313 * Flags - Flags describing the search restrictions 314 * WalkState - Current state of the walk 315 * ReturnNode - Where the Node is placed (if found 316 * or created successfully) 317 * 318 * RETURN: Status 319 * 320 * DESCRIPTION: Find or enter the passed name in the name space. 321 * Log an error if name not found in Exec mode. 322 * 323 * MUTEX: Assumes namespace is locked. 324 * 325 ******************************************************************************/ 326 327ACPI_STATUS 328AcpiNsLookup ( 329 ACPI_GENERIC_STATE *ScopeInfo, 330 NATIVE_CHAR *Pathname, 331 ACPI_OBJECT_TYPE8 Type, 332 OPERATING_MODE InterpreterMode, 333 UINT32 Flags, 334 ACPI_WALK_STATE *WalkState, 335 ACPI_NAMESPACE_NODE **ReturnNode) 336{ 337 ACPI_STATUS Status; 338 ACPI_NAMESPACE_NODE *PrefixNode; 339 ACPI_NAMESPACE_NODE *CurrentNode = NULL; 340 ACPI_NAMESPACE_NODE *ScopeToPush = NULL; 341 ACPI_NAMESPACE_NODE *ThisNode = NULL; 342 UINT32 NumSegments; 343 ACPI_NAME SimpleName; 344 BOOLEAN NullNamePath = FALSE; 345 ACPI_OBJECT_TYPE8 TypeToCheckFor; 346 ACPI_OBJECT_TYPE8 ThisSearchType; 347 UINT32 LocalFlags = Flags & ~NS_ERROR_IF_FOUND; 348 349 DEBUG_EXEC (UINT32 i;) 350 351 352 FUNCTION_TRACE ("NsLookup"); 353 354 355 if (!ReturnNode) 356 { 357 return_ACPI_STATUS (AE_BAD_PARAMETER); 358 } 359 360 361 AcpiGbl_NsLookupCount++; 362 363 *ReturnNode = ENTRY_NOT_FOUND; 364 365 366 if (!AcpiGbl_RootNode) 367 { 368 return (AE_NO_NAMESPACE); 369 } 370 371 /* 372 * Get the prefix scope. 373 * A null scope means use the root scope 374 */ 375 if ((!ScopeInfo) || 376 (!ScopeInfo->Scope.Node)) 377 { 378 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Null scope prefix, using root node (%p)\n", 379 AcpiGbl_RootNode)); 380 381 PrefixNode = AcpiGbl_RootNode; 382 } 383 else 384 { 385 PrefixNode = ScopeInfo->Scope.Node; 386 } 387 388 389 /* 390 * This check is explicitly split to relax the TypeToCheckFor 391 * conditions for BankFieldDefn. Originally, both BankFieldDefn and 392 * DefFieldDefn caused TypeToCheckFor to be set to ACPI_TYPE_REGION, 393 * but the BankFieldDefn may also check for a Field definition as well 394 * as an OperationRegion. 395 */ 396 if (INTERNAL_TYPE_FIELD_DEFN == Type) 397 { 398 /* DefFieldDefn defines fields in a Region */ 399 400 TypeToCheckFor = ACPI_TYPE_REGION; 401 } 402 403 else if (INTERNAL_TYPE_BANK_FIELD_DEFN == Type) 404 { 405 /* BankFieldDefn defines data fields in a Field Object */ 406 407 TypeToCheckFor = ACPI_TYPE_ANY; 408 } 409 410 else 411 { 412 TypeToCheckFor = Type; 413 } 414 415 416 /* TBD: [Restructure] - Move the pathname stuff into a new procedure */ 417 418 /* Examine the name pointer */ 419 420 if (!Pathname) 421 { 422 /* 8-12-98 ASL Grammar Update supports null NamePath */ 423 424 NullNamePath = TRUE; 425 NumSegments = 0; 426 ThisNode = AcpiGbl_RootNode; 427 428 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 429 "Null Pathname (Zero segments), Flags=%x\n", Flags)); 430 } 431 432 else 433 { 434 /* 435 * Valid name pointer (Internal name format) 436 * 437 * Check for prefixes. As represented in the AML stream, a 438 * Pathname consists of an optional scope prefix followed by 439 * a segment part. 440 * 441 * If present, the scope prefix is either a RootPrefix (in 442 * which case the name is fully qualified), or zero or more 443 * ParentPrefixes (in which case the name's scope is relative 444 * to the current scope). 445 * 446 * The segment part consists of either: 447 * - A single 4-byte name segment, or 448 * - A DualNamePrefix followed by two 4-byte name segments, or 449 * - A MultiNamePrefixOp, followed by a byte indicating the 450 * number of segments and the segments themselves. 451 */ 452 if (*Pathname == AML_ROOT_PREFIX) 453 { 454 /* Pathname is fully qualified, look in root name table */ 455 456 CurrentNode = AcpiGbl_RootNode; 457 458 /* point to segment part */ 459 460 Pathname++; 461 462 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Searching from root [%p]\n", 463 CurrentNode)); 464 465 /* Direct reference to root, "\" */ 466 467 if (!(*Pathname)) 468 { 469 ThisNode = AcpiGbl_RootNode; 470 goto CheckForNewScopeAndExit; 471 } 472 } 473 474 else 475 { 476 /* Pathname is relative to current scope, start there */ 477 478 CurrentNode = PrefixNode; 479 480 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Searching relative to pfx scope [%p]\n", 481 PrefixNode)); 482 483 /* 484 * Handle up-prefix (carat). More than one prefix 485 * is supported 486 */ 487 while (*Pathname == AML_PARENT_PREFIX) 488 { 489 /* Point to segment part or next ParentPrefix */ 490 491 Pathname++; 492 493 /* Backup to the parent's scope */ 494 495 ThisNode = AcpiNsGetParentObject (CurrentNode); 496 if (!ThisNode) 497 { 498 /* Current scope has no parent scope */ 499 500 REPORT_ERROR ( 501 ("Too many parent prefixes (^) - reached root\n")); 502 return_ACPI_STATUS (AE_NOT_FOUND); 503 } 504 505 CurrentNode = ThisNode; 506 } 507 } 508 509 510 /* 511 * Examine the name prefix opcode, if any, 512 * to determine the number of segments 513 */ 514 if (*Pathname == AML_DUAL_NAME_PREFIX) 515 { 516 NumSegments = 2; 517 518 /* point to first segment */ 519 520 Pathname++; 521 522 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 523 "Dual Pathname (2 segments, Flags=%X)\n", Flags)); 524 } 525 526 else if (*Pathname == AML_MULTI_NAME_PREFIX_OP) 527 { 528 NumSegments = (UINT32)* (UINT8 *) ++Pathname; 529 530 /* point to first segment */ 531 532 Pathname++; 533 534 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 535 "Multi Pathname (%d Segments, Flags=%X) \n", 536 NumSegments, Flags)); 537 } 538 539 else 540 { 541 /* 542 * No Dual or Multi prefix, hence there is only one 543 * segment and Pathname is already pointing to it. 544 */ 545 NumSegments = 1; 546 547 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 548 "Simple Pathname (1 segment, Flags=%X)\n", Flags)); 549 } 550 551#ifdef ACPI_DEBUG 552 553 /* TBD: [Restructure] Make this a procedure */ 554 555 /* Debug only: print the entire name that we are about to lookup */ 556 557 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "[")); 558 559 for (i = 0; i < NumSegments; i++) 560 { 561 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_NAMES, "%4.4s/", (char*)&Pathname[i * 4])); 562 } 563 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_NAMES, "]\n")); 564#endif 565 } 566 567 568 /* 569 * Search namespace for each segment of the name. 570 * Loop through and verify/add each name segment. 571 */ 572 while (NumSegments-- && CurrentNode) 573 { 574 /* 575 * Search for the current name segment under the current 576 * named object. The Type is significant only at the last (topmost) 577 * level. (We don't care about the types along the path, only 578 * the type of the final target object.) 579 */ 580 ThisSearchType = ACPI_TYPE_ANY; 581 if (!NumSegments) 582 { 583 ThisSearchType = Type; 584 LocalFlags = Flags; 585 } 586 587 /* Pluck one ACPI name from the front of the pathname */ 588 589 MOVE_UNALIGNED32_TO_32 (&SimpleName, Pathname); 590 591 /* Try to find the ACPI name */ 592 593 Status = AcpiNsSearchAndEnter (SimpleName, WalkState, 594 CurrentNode, InterpreterMode, 595 ThisSearchType, LocalFlags, 596 &ThisNode); 597 598 if (ACPI_FAILURE (Status)) 599 { 600 if (Status == AE_NOT_FOUND) 601 { 602 /* Name not found in ACPI namespace */ 603 604 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 605 "Name [%4.4s] not found in scope %p\n", 606 (char*)&SimpleName, CurrentNode)); 607 } 608 609 return_ACPI_STATUS (Status); 610 } 611 612 613 /* 614 * If 1) This is the last segment (NumSegments == 0) 615 * 2) and looking for a specific type 616 * (Not checking for TYPE_ANY) 617 * 3) Which is not an alias 618 * 4) which is not a local type (TYPE_DEF_ANY) 619 * 5) which is not a local type (TYPE_SCOPE) 620 * 6) which is not a local type (TYPE_INDEX_FIELD_DEFN) 621 * 7) and type of object is known (not TYPE_ANY) 622 * 8) and object does not match request 623 * 624 * Then we have a type mismatch. Just warn and ignore it. 625 */ 626 if ((NumSegments == 0) && 627 (TypeToCheckFor != ACPI_TYPE_ANY) && 628 (TypeToCheckFor != INTERNAL_TYPE_ALIAS) && 629 (TypeToCheckFor != INTERNAL_TYPE_DEF_ANY) && 630 (TypeToCheckFor != INTERNAL_TYPE_SCOPE) && 631 (TypeToCheckFor != INTERNAL_TYPE_INDEX_FIELD_DEFN) && 632 (ThisNode->Type != ACPI_TYPE_ANY) && 633 (ThisNode->Type != TypeToCheckFor)) 634 { 635 /* Complain about a type mismatch */ 636 637 REPORT_WARNING ( 638 ("NsLookup: %4.4s, type %X, checking for type %X\n", 639 (char*)&SimpleName, ThisNode->Type, TypeToCheckFor)); 640 } 641 642 /* 643 * If this is the last name segment and we are not looking for a 644 * specific type, but the type of found object is known, use that type 645 * to see if it opens a scope. 646 */ 647 if ((0 == NumSegments) && (ACPI_TYPE_ANY == Type)) 648 { 649 Type = ThisNode->Type; 650 } 651 652 if ((NumSegments || AcpiNsOpensScope (Type)) && 653 (ThisNode->Child == NULL)) 654 { 655 /* 656 * More segments or the type implies enclosed scope, 657 * and the next scope has not been allocated. 658 */ 659 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Load mode=%X ThisNode=%p\n", 660 InterpreterMode, ThisNode)); 661 } 662 663 CurrentNode = ThisNode; 664 665 /* point to next name segment */ 666 667 Pathname += ACPI_NAME_SIZE; 668 } 669 670 671 /* 672 * Always check if we need to open a new scope 673 */ 674CheckForNewScopeAndExit: 675 676 if (!(Flags & NS_DONT_OPEN_SCOPE) && (WalkState)) 677 { 678 /* 679 * If entry is a type which opens a scope, 680 * push the new scope on the scope stack. 681 */ 682 if (AcpiNsOpensScope (TypeToCheckFor)) 683 { 684 /* 8-12-98 ASL Grammar Update supports null NamePath */ 685 686 if (NullNamePath) 687 { 688 /* TBD: [Investigate] - is this the correct thing to do? */ 689 690 ScopeToPush = NULL; 691 } 692 else 693 { 694 ScopeToPush = ThisNode; 695 } 696 697 Status = AcpiDsScopeStackPush (ScopeToPush, Type, 698 WalkState); 699 if (ACPI_FAILURE (Status)) 700 { 701 return_ACPI_STATUS (Status); 702 } 703 704 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Set global scope to %p\n", ScopeToPush)); 705 } 706 } 707 708 *ReturnNode = ThisNode; 709 return_ACPI_STATUS (AE_OK); 710} 711 712