nsutils.c revision 99679
1/****************************************************************************** 2 * 3 * Module Name: nsutils - Utilities for accessing ACPI namespace, accessing 4 * parents and siblings and Scope manipulation 5 * $Revision: 110 $ 6 * 7 *****************************************************************************/ 8 9/****************************************************************************** 10 * 11 * 1. Copyright Notice 12 * 13 * Some or all of this work - Copyright (c) 1999 - 2002, Intel Corp. 14 * All rights reserved. 15 * 16 * 2. License 17 * 18 * 2.1. This is your license from Intel Corp. under its intellectual property 19 * rights. You may have additional license terms from the party that provided 20 * you this software, covering your right to use that party's intellectual 21 * property rights. 22 * 23 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 24 * copy of the source code appearing in this file ("Covered Code") an 25 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 26 * base code distributed originally by Intel ("Original Intel Code") to copy, 27 * make derivatives, distribute, use and display any portion of the Covered 28 * Code in any form, with the right to sublicense such rights; and 29 * 30 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 31 * license (with the right to sublicense), under only those claims of Intel 32 * patents that are infringed by the Original Intel Code, to make, use, sell, 33 * offer to sell, and import the Covered Code and derivative works thereof 34 * solely to the minimum extent necessary to exercise the above copyright 35 * license, and in no event shall the patent license extend to any additions 36 * to or modifications of the Original Intel Code. No other license or right 37 * is granted directly or by implication, estoppel or otherwise; 38 * 39 * The above copyright and patent license is granted only if the following 40 * conditions are met: 41 * 42 * 3. Conditions 43 * 44 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 45 * Redistribution of source code of any substantial portion of the Covered 46 * Code or modification with rights to further distribute source must include 47 * the above Copyright Notice, the above License, this list of Conditions, 48 * and the following Disclaimer and Export Compliance provision. In addition, 49 * Licensee must cause all Covered Code to which Licensee contributes to 50 * contain a file documenting the changes Licensee made to create that Covered 51 * Code and the date of any change. Licensee must include in that file the 52 * documentation of any changes made by any predecessor Licensee. Licensee 53 * must include a prominent statement that the modification is derived, 54 * directly or indirectly, from Original Intel Code. 55 * 56 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 57 * Redistribution of source code of any substantial portion of the Covered 58 * Code or modification without rights to further distribute source must 59 * include the following Disclaimer and Export Compliance provision in the 60 * documentation and/or other materials provided with distribution. In 61 * addition, Licensee may not authorize further sublicense of source of any 62 * portion of the Covered Code, and must include terms to the effect that the 63 * license from Licensee to its licensee is limited to the intellectual 64 * property embodied in the software Licensee provides to its licensee, and 65 * not to intellectual property embodied in modifications its licensee may 66 * make. 67 * 68 * 3.3. Redistribution of Executable. Redistribution in executable form of any 69 * substantial portion of the Covered Code or modification must reproduce the 70 * above Copyright Notice, and the following Disclaimer and Export Compliance 71 * provision in the documentation and/or other materials provided with the 72 * distribution. 73 * 74 * 3.4. Intel retains all right, title, and interest in and to the Original 75 * Intel Code. 76 * 77 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 78 * Intel shall be used in advertising or otherwise to promote the sale, use or 79 * other dealings in products derived from or relating to the Covered Code 80 * without prior written authorization from Intel. 81 * 82 * 4. Disclaimer and Export Compliance 83 * 84 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 85 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 86 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 87 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 88 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 89 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 90 * PARTICULAR PURPOSE. 91 * 92 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 93 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 94 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 95 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 96 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 97 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 98 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 99 * LIMITED REMEDY. 100 * 101 * 4.3. Licensee shall not export, either directly or indirectly, any of this 102 * software or system incorporating such software without first obtaining any 103 * required license or other approval from the U. S. Department of Commerce or 104 * any other agency or department of the United States Government. In the 105 * event Licensee exports any such software from the United States or 106 * re-exports any such software from a foreign destination, Licensee shall 107 * ensure that the distribution and export/re-export of the software is in 108 * compliance with all laws, regulations, orders, or other restrictions of the 109 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 110 * any of its subsidiaries will export/re-export any technical data, process, 111 * software, or service, directly or indirectly, to any country for which the 112 * United States government or any agency thereof requires an export license, 113 * other governmental approval, or letter of assurance, without first obtaining 114 * such license, approval or letter. 115 * 116 *****************************************************************************/ 117 118#define __NSUTILS_C__ 119 120#include "acpi.h" 121#include "acnamesp.h" 122#include "amlcode.h" 123#include "actables.h" 124 125#define _COMPONENT ACPI_NAMESPACE 126 ACPI_MODULE_NAME ("nsutils") 127 128 129/******************************************************************************* 130 * 131 * FUNCTION: AcpiNsValidRootPrefix 132 * 133 * PARAMETERS: Prefix - Character to be checked 134 * 135 * RETURN: TRUE if a valid prefix 136 * 137 * DESCRIPTION: Check if a character is a valid ACPI Root prefix 138 * 139 ******************************************************************************/ 140 141BOOLEAN 142AcpiNsValidRootPrefix ( 143 NATIVE_CHAR Prefix) 144{ 145 146 return ((BOOLEAN) (Prefix == '\\')); 147} 148 149 150/******************************************************************************* 151 * 152 * FUNCTION: AcpiNsValidPathSeparator 153 * 154 * PARAMETERS: Sep - Character to be checked 155 * 156 * RETURN: TRUE if a valid path separator 157 * 158 * DESCRIPTION: Check if a character is a valid ACPI path separator 159 * 160 ******************************************************************************/ 161 162BOOLEAN 163AcpiNsValidPathSeparator ( 164 NATIVE_CHAR Sep) 165{ 166 167 return ((BOOLEAN) (Sep == '.')); 168} 169 170 171/******************************************************************************* 172 * 173 * FUNCTION: AcpiNsGetType 174 * 175 * PARAMETERS: Handle - Parent Node to be examined 176 * 177 * RETURN: Type field from Node whose handle is passed 178 * 179 ******************************************************************************/ 180 181ACPI_OBJECT_TYPE 182AcpiNsGetType ( 183 ACPI_NAMESPACE_NODE *Node) 184{ 185 ACPI_FUNCTION_TRACE ("NsGetType"); 186 187 188 if (!Node) 189 { 190 ACPI_REPORT_WARNING (("NsGetType: Null Node ptr")); 191 return_VALUE (ACPI_TYPE_ANY); 192 } 193 194 return_VALUE ((ACPI_OBJECT_TYPE) Node->Type); 195} 196 197 198/******************************************************************************* 199 * 200 * FUNCTION: AcpiNsLocal 201 * 202 * PARAMETERS: Type - A namespace object type 203 * 204 * RETURN: LOCAL if names must be found locally in objects of the 205 * passed type, 0 if enclosing scopes should be searched 206 * 207 ******************************************************************************/ 208 209UINT32 210AcpiNsLocal ( 211 ACPI_OBJECT_TYPE Type) 212{ 213 ACPI_FUNCTION_TRACE ("NsLocal"); 214 215 216 if (!AcpiUtValidObjectType (Type)) 217 { 218 /* Type code out of range */ 219 220 ACPI_REPORT_WARNING (("NsLocal: Invalid Object Type\n")); 221 return_VALUE (ACPI_NS_NORMAL); 222 } 223 224 return_VALUE ((UINT32) AcpiGbl_NsProperties[Type] & ACPI_NS_LOCAL); 225} 226 227 228/******************************************************************************* 229 * 230 * FUNCTION: AcpiNsGetInternalNameLength 231 * 232 * PARAMETERS: Info - Info struct initialized with the 233 * external name pointer. 234 * 235 * RETURN: Status 236 * 237 * DESCRIPTION: Calculate the length of the internal (AML) namestring 238 * corresponding to the external (ASL) namestring. 239 * 240 ******************************************************************************/ 241 242void 243AcpiNsGetInternalNameLength ( 244 ACPI_NAMESTRING_INFO *Info) 245{ 246 NATIVE_CHAR *NextExternalChar; 247 UINT32 i; 248 249 250 ACPI_FUNCTION_ENTRY (); 251 252 253 NextExternalChar = Info->ExternalName; 254 Info->NumCarats = 0; 255 Info->NumSegments = 0; 256 Info->FullyQualified = FALSE; 257 258 /* 259 * For the internal name, the required length is 4 bytes 260 * per segment, plus 1 each for RootPrefix, MultiNamePrefixOp, 261 * segment count, trailing null (which is not really needed, 262 * but no there's harm in putting it there) 263 * 264 * strlen() + 1 covers the first NameSeg, which has no 265 * path separator 266 */ 267 if (AcpiNsValidRootPrefix (NextExternalChar[0])) 268 { 269 Info->FullyQualified = TRUE; 270 NextExternalChar++; 271 } 272 else 273 { 274 /* 275 * Handle Carat prefixes 276 */ 277 while (*NextExternalChar == '^') 278 { 279 Info->NumCarats++; 280 NextExternalChar++; 281 } 282 } 283 284 /* 285 * Determine the number of ACPI name "segments" by counting 286 * the number of path separators within the string. Start 287 * with one segment since the segment count is (# separators) 288 * + 1, and zero separators is ok. 289 */ 290 if (*NextExternalChar) 291 { 292 Info->NumSegments = 1; 293 for (i = 0; NextExternalChar[i]; i++) 294 { 295 if (AcpiNsValidPathSeparator (NextExternalChar[i])) 296 { 297 Info->NumSegments++; 298 } 299 } 300 } 301 302 Info->Length = (ACPI_NAME_SIZE * Info->NumSegments) + 303 4 + Info->NumCarats; 304 305 Info->NextExternalChar = NextExternalChar; 306} 307 308 309/******************************************************************************* 310 * 311 * FUNCTION: AcpiNsBuildInternalName 312 * 313 * PARAMETERS: Info - Info struct fully initialized 314 * 315 * RETURN: Status 316 * 317 * DESCRIPTION: Construct the internal (AML) namestring 318 * corresponding to the external (ASL) namestring. 319 * 320 ******************************************************************************/ 321 322ACPI_STATUS 323AcpiNsBuildInternalName ( 324 ACPI_NAMESTRING_INFO *Info) 325{ 326 UINT32 NumSegments = Info->NumSegments; 327 NATIVE_CHAR *InternalName = Info->InternalName; 328 NATIVE_CHAR *ExternalName = Info->NextExternalChar; 329 NATIVE_CHAR *Result = NULL; 330 NATIVE_UINT i; 331 332 333 ACPI_FUNCTION_TRACE ("NsBuildInternalName"); 334 335 336 /* Setup the correct prefixes, counts, and pointers */ 337 338 if (Info->FullyQualified) 339 { 340 InternalName[0] = '\\'; 341 342 if (NumSegments <= 1) 343 { 344 Result = &InternalName[1]; 345 } 346 else if (NumSegments == 2) 347 { 348 InternalName[1] = AML_DUAL_NAME_PREFIX; 349 Result = &InternalName[2]; 350 } 351 else 352 { 353 InternalName[1] = AML_MULTI_NAME_PREFIX_OP; 354 InternalName[2] = (char) NumSegments; 355 Result = &InternalName[3]; 356 } 357 } 358 else 359 { 360 /* 361 * Not fully qualified. 362 * Handle Carats first, then append the name segments 363 */ 364 i = 0; 365 if (Info->NumCarats) 366 { 367 for (i = 0; i < Info->NumCarats; i++) 368 { 369 InternalName[i] = '^'; 370 } 371 } 372 373 if (NumSegments <= 1) 374 { 375 Result = &InternalName[i]; 376 } 377 else if (NumSegments == 2) 378 { 379 InternalName[i] = AML_DUAL_NAME_PREFIX; 380 Result = &InternalName[i+1]; 381 } 382 else 383 { 384 InternalName[i] = AML_MULTI_NAME_PREFIX_OP; 385 InternalName[i+1] = (char) NumSegments; 386 Result = &InternalName[i+2]; 387 } 388 } 389 390 /* Build the name (minus path separators) */ 391 392 for (; NumSegments; NumSegments--) 393 { 394 for (i = 0; i < ACPI_NAME_SIZE; i++) 395 { 396 if (AcpiNsValidPathSeparator (*ExternalName) || 397 (*ExternalName == 0)) 398 { 399 /* Pad the segment with underscore(s) if segment is short */ 400 401 Result[i] = '_'; 402 } 403 else 404 { 405 /* Convert the character to uppercase and save it */ 406 407 Result[i] = (char) ACPI_TOUPPER ((int) *ExternalName); 408 ExternalName++; 409 } 410 } 411 412 /* Now we must have a path separator, or the pathname is bad */ 413 414 if (!AcpiNsValidPathSeparator (*ExternalName) && 415 (*ExternalName != 0)) 416 { 417 return_ACPI_STATUS (AE_BAD_PARAMETER); 418 } 419 420 /* Move on the next segment */ 421 422 ExternalName++; 423 Result += ACPI_NAME_SIZE; 424 } 425 426 /* Terminate the string */ 427 428 *Result = 0; 429 430 if (Info->FullyQualified) 431 { 432 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "returning [%p] (abs) \"\\%s\"\n", 433 InternalName, InternalName)); 434 } 435 else 436 { 437 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "returning [%p] (rel) \"%s\"\n", 438 InternalName, InternalName)); 439 } 440 441 return_ACPI_STATUS (AE_OK); 442} 443 444 445/******************************************************************************* 446 * 447 * FUNCTION: AcpiNsInternalizeName 448 * 449 * PARAMETERS: *ExternalName - External representation of name 450 * **Converted Name - Where to return the resulting 451 * internal represention of the name 452 * 453 * RETURN: Status 454 * 455 * DESCRIPTION: Convert an external representation (e.g. "\_PR_.CPU0") 456 * to internal form (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30) 457 * 458 *******************************************************************************/ 459 460ACPI_STATUS 461AcpiNsInternalizeName ( 462 NATIVE_CHAR *ExternalName, 463 NATIVE_CHAR **ConvertedName) 464{ 465 NATIVE_CHAR *InternalName; 466 ACPI_NAMESTRING_INFO Info; 467 ACPI_STATUS Status; 468 469 470 ACPI_FUNCTION_TRACE ("NsInternalizeName"); 471 472 473 if ((!ExternalName) || 474 (*ExternalName == 0) || 475 (!ConvertedName)) 476 { 477 return_ACPI_STATUS (AE_BAD_PARAMETER); 478 } 479 480 /* Get the length of the new internal name */ 481 482 Info.ExternalName = ExternalName; 483 AcpiNsGetInternalNameLength (&Info); 484 485 /* We need a segment to store the internal name */ 486 487 InternalName = ACPI_MEM_CALLOCATE (Info.Length); 488 if (!InternalName) 489 { 490 return_ACPI_STATUS (AE_NO_MEMORY); 491 } 492 493 /* Build the name */ 494 495 Info.InternalName = InternalName; 496 Status = AcpiNsBuildInternalName (&Info); 497 if (ACPI_FAILURE (Status)) 498 { 499 ACPI_MEM_FREE (InternalName); 500 return_ACPI_STATUS (Status); 501 } 502 503 *ConvertedName = InternalName; 504 return_ACPI_STATUS (AE_OK); 505} 506 507 508/******************************************************************************* 509 * 510 * FUNCTION: AcpiNsExternalizeName 511 * 512 * PARAMETERS: *InternalName - Internal representation of name 513 * **ConvertedName - Where to return the resulting 514 * external representation of name 515 * 516 * RETURN: Status 517 * 518 * DESCRIPTION: Convert internal name (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30) 519 * to its external form (e.g. "\_PR_.CPU0") 520 * 521 ******************************************************************************/ 522 523ACPI_STATUS 524AcpiNsExternalizeName ( 525 UINT32 InternalNameLength, 526 char *InternalName, 527 UINT32 *ConvertedNameLength, 528 char **ConvertedName) 529{ 530 NATIVE_UINT_MIN32 PrefixLength = 0; 531 NATIVE_UINT_MIN32 NamesIndex = 0; 532 NATIVE_UINT_MIN32 NumSegments = 0; 533 NATIVE_UINT_MIN32 i = 0; 534 NATIVE_UINT_MIN32 j = 0; 535 NATIVE_UINT_MIN32 RequiredLength; 536 537 538 ACPI_FUNCTION_TRACE ("NsExternalizeName"); 539 540 541 if (!InternalNameLength || 542 !InternalName || 543 !ConvertedName) 544 { 545 return_ACPI_STATUS (AE_BAD_PARAMETER); 546 } 547 548 /* 549 * Check for a prefix (one '\' | one or more '^'). 550 */ 551 switch (InternalName[0]) 552 { 553 case '\\': 554 PrefixLength = 1; 555 break; 556 557 case '^': 558 for (i = 0; i < InternalNameLength; i++) 559 { 560 if (InternalName[i] != '^') 561 { 562 PrefixLength = i + 1; 563 } 564 } 565 566 if (i == InternalNameLength) 567 { 568 PrefixLength = i; 569 } 570 571 break; 572 573 default: 574 break; 575 } 576 577 /* 578 * Check for object names. Note that there could be 0-255 of these 579 * 4-byte elements. 580 */ 581 if (PrefixLength < InternalNameLength) 582 { 583 switch (InternalName[PrefixLength]) 584 { 585 case AML_MULTI_NAME_PREFIX_OP: 586 587 /* <count> 4-byte names */ 588 589 NamesIndex = PrefixLength + 2; 590 NumSegments = (UINT32) (UINT8) InternalName[PrefixLength + 1]; 591 break; 592 593 case AML_DUAL_NAME_PREFIX: 594 595 /* Two 4-byte names */ 596 597 NamesIndex = PrefixLength + 1; 598 NumSegments = 2; 599 break; 600 601 case 0: 602 603 /* NullName */ 604 605 NamesIndex = 0; 606 NumSegments = 0; 607 break; 608 609 default: 610 611 /* one 4-byte name */ 612 613 NamesIndex = PrefixLength; 614 NumSegments = 1; 615 break; 616 } 617 } 618 619 /* 620 * Calculate the length of ConvertedName, which equals the length 621 * of the prefix, length of all object names, length of any required 622 * punctuation ('.') between object names, plus the NULL terminator. 623 */ 624 RequiredLength = PrefixLength + (4 * NumSegments) + 625 ((NumSegments > 0) ? (NumSegments - 1) : 0) + 1; 626 627 /* 628 * Check to see if we're still in bounds. If not, there's a problem 629 * with InternalName (invalid format). 630 */ 631 if (RequiredLength > InternalNameLength) 632 { 633 ACPI_REPORT_ERROR (("NsExternalizeName: Invalid internal name\n")); 634 return_ACPI_STATUS (AE_BAD_PATHNAME); 635 } 636 637 /* 638 * Build ConvertedName... 639 */ 640 *ConvertedName = ACPI_MEM_CALLOCATE (RequiredLength); 641 if (!(*ConvertedName)) 642 { 643 return_ACPI_STATUS (AE_NO_MEMORY); 644 } 645 646 j = 0; 647 648 for (i = 0; i < PrefixLength; i++) 649 { 650 (*ConvertedName)[j++] = InternalName[i]; 651 } 652 653 if (NumSegments > 0) 654 { 655 for (i = 0; i < NumSegments; i++) 656 { 657 if (i > 0) 658 { 659 (*ConvertedName)[j++] = '.'; 660 } 661 662 (*ConvertedName)[j++] = InternalName[NamesIndex++]; 663 (*ConvertedName)[j++] = InternalName[NamesIndex++]; 664 (*ConvertedName)[j++] = InternalName[NamesIndex++]; 665 (*ConvertedName)[j++] = InternalName[NamesIndex++]; 666 } 667 } 668 669 if (ConvertedNameLength) 670 { 671 *ConvertedNameLength = (UINT32) RequiredLength; 672 } 673 674 return_ACPI_STATUS (AE_OK); 675} 676 677 678/******************************************************************************* 679 * 680 * FUNCTION: AcpiNsMapHandleToNode 681 * 682 * PARAMETERS: Handle - Handle to be converted to an Node 683 * 684 * RETURN: A Name table entry pointer 685 * 686 * DESCRIPTION: Convert a namespace handle to a real Node 687 * 688 * Note: Real integer handles allow for more verification 689 * and keep all pointers within this subsystem. 690 * 691 ******************************************************************************/ 692 693ACPI_NAMESPACE_NODE * 694AcpiNsMapHandleToNode ( 695 ACPI_HANDLE Handle) 696{ 697 698 ACPI_FUNCTION_ENTRY (); 699 700 701 /* 702 * Simple implementation. 703 */ 704 if (!Handle) 705 { 706 return (NULL); 707 } 708 709 if (Handle == ACPI_ROOT_OBJECT) 710 { 711 return (AcpiGbl_RootNode); 712 } 713 714 /* We can at least attempt to verify the handle */ 715 716 if (ACPI_GET_DESCRIPTOR_TYPE (Handle) != ACPI_DESC_TYPE_NAMED) 717 { 718 return (NULL); 719 } 720 721 return ((ACPI_NAMESPACE_NODE *) Handle); 722} 723 724 725/******************************************************************************* 726 * 727 * FUNCTION: AcpiNsConvertEntryToHandle 728 * 729 * PARAMETERS: Node - Node to be converted to a Handle 730 * 731 * RETURN: An USER ACPI_HANDLE 732 * 733 * DESCRIPTION: Convert a real Node to a namespace handle 734 * 735 ******************************************************************************/ 736 737ACPI_HANDLE 738AcpiNsConvertEntryToHandle ( 739 ACPI_NAMESPACE_NODE *Node) 740{ 741 742 743 /* 744 * Simple implementation for now; 745 */ 746 return ((ACPI_HANDLE) Node); 747 748 749/* --------------------------------------------------- 750 751 if (!Node) 752 { 753 return (NULL); 754 } 755 756 if (Node == AcpiGbl_RootNode) 757 { 758 return (ACPI_ROOT_OBJECT); 759 } 760 761 762 return ((ACPI_HANDLE) Node); 763------------------------------------------------------*/ 764} 765 766 767/******************************************************************************* 768 * 769 * FUNCTION: AcpiNsTerminate 770 * 771 * PARAMETERS: none 772 * 773 * RETURN: none 774 * 775 * DESCRIPTION: free memory allocated for table storage. 776 * 777 ******************************************************************************/ 778 779void 780AcpiNsTerminate (void) 781{ 782 ACPI_OPERAND_OBJECT *ObjDesc; 783 ACPI_NAMESPACE_NODE *ThisNode; 784 785 786 ACPI_FUNCTION_TRACE ("NsTerminate"); 787 788 789 ThisNode = AcpiGbl_RootNode; 790 791 /* 792 * 1) Free the entire namespace -- all objects, tables, and stacks 793 * 794 * Delete all objects linked to the root 795 * (additional table descriptors) 796 */ 797 AcpiNsDeleteNamespaceSubtree (ThisNode); 798 799 /* Detach any object(s) attached to the root */ 800 801 ObjDesc = AcpiNsGetAttachedObject (ThisNode); 802 if (ObjDesc) 803 { 804 AcpiNsDetachObject (ThisNode); 805 AcpiUtRemoveReference (ObjDesc); 806 } 807 808 AcpiNsDeleteChildren (ThisNode); 809 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Namespace freed\n")); 810 811 812 /* 813 * 2) Now we can delete the ACPI tables 814 */ 815 AcpiTbDeleteAcpiTables (); 816 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "ACPI Tables freed\n")); 817 818 return_VOID; 819} 820 821 822/******************************************************************************* 823 * 824 * FUNCTION: AcpiNsOpensScope 825 * 826 * PARAMETERS: Type - A valid namespace type 827 * 828 * RETURN: NEWSCOPE if the passed type "opens a name scope" according 829 * to the ACPI specification, else 0 830 * 831 ******************************************************************************/ 832 833UINT32 834AcpiNsOpensScope ( 835 ACPI_OBJECT_TYPE Type) 836{ 837 ACPI_FUNCTION_TRACE_U32 ("NsOpensScope", Type); 838 839 840 if (!AcpiUtValidObjectType (Type)) 841 { 842 /* type code out of range */ 843 844 ACPI_REPORT_WARNING (("NsOpensScope: Invalid Object Type %X\n", Type)); 845 return_VALUE (ACPI_NS_NORMAL); 846 } 847 848 return_VALUE (((UINT32) AcpiGbl_NsProperties[Type]) & ACPI_NS_NEWSCOPE); 849} 850 851 852/******************************************************************************* 853 * 854 * FUNCTION: AcpiNsGetNodeByPath 855 * 856 * PARAMETERS: *Pathname - Name to be found, in external (ASL) format. The 857 * \ (backslash) and ^ (carat) prefixes, and the 858 * . (period) to separate segments are supported. 859 * StartNode - Root of subtree to be searched, or NS_ALL for the 860 * root of the name space. If Name is fully 861 * qualified (first INT8 is '\'), the passed value 862 * of Scope will not be accessed. 863 * Flags - Used to indicate whether to perform upsearch or 864 * not. 865 * ReturnNode - Where the Node is returned 866 * 867 * DESCRIPTION: Look up a name relative to a given scope and return the 868 * corresponding Node. NOTE: Scope can be null. 869 * 870 * MUTEX: Locks namespace 871 * 872 ******************************************************************************/ 873 874ACPI_STATUS 875AcpiNsGetNodeByPath ( 876 NATIVE_CHAR *Pathname, 877 ACPI_NAMESPACE_NODE *StartNode, 878 UINT32 Flags, 879 ACPI_NAMESPACE_NODE **ReturnNode) 880{ 881 ACPI_GENERIC_STATE ScopeInfo; 882 ACPI_STATUS Status; 883 NATIVE_CHAR *InternalPath = NULL; 884 885 886 ACPI_FUNCTION_TRACE_PTR ("NsGetNodeByPath", Pathname); 887 888 889 if (!Pathname) 890 { 891 return_ACPI_STATUS (AE_BAD_PARAMETER); 892 } 893 894 /* Convert path to internal representation */ 895 896 Status = AcpiNsInternalizeName (Pathname, &InternalPath); 897 if (ACPI_FAILURE (Status)) 898 { 899 return_ACPI_STATUS (Status); 900 } 901 902 /* Must lock namespace during lookup */ 903 904 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 905 if (ACPI_FAILURE (Status)) 906 { 907 return_ACPI_STATUS (Status); 908 } 909 910 /* Setup lookup scope (search starting point) */ 911 912 ScopeInfo.Scope.Node = StartNode; 913 914 /* Lookup the name in the namespace */ 915 916 Status = AcpiNsLookup (&ScopeInfo, InternalPath, 917 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 918 (Flags | ACPI_NS_DONT_OPEN_SCOPE), 919 NULL, ReturnNode); 920 if (ACPI_FAILURE (Status)) 921 { 922 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "%s, %s\n", 923 InternalPath, AcpiFormatException (Status))); 924 } 925 926 /* Cleanup */ 927 928 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 929 ACPI_MEM_FREE (InternalPath); 930 return_ACPI_STATUS (Status); 931} 932 933 934/******************************************************************************* 935 * 936 * FUNCTION: AcpiNsFindParentName 937 * 938 * PARAMETERS: *ChildNode - Named Obj whose name is to be found 939 * 940 * RETURN: The ACPI name 941 * 942 * DESCRIPTION: Search for the given obj in its parent scope and return the 943 * name segment, or "????" if the parent name can't be found 944 * (which "should not happen"). 945 * 946 ******************************************************************************/ 947 948ACPI_NAME 949AcpiNsFindParentName ( 950 ACPI_NAMESPACE_NODE *ChildNode) 951{ 952 ACPI_NAMESPACE_NODE *ParentNode; 953 954 955 ACPI_FUNCTION_TRACE ("NsFindParentName"); 956 957 958 if (ChildNode) 959 { 960 /* Valid entry. Get the parent Node */ 961 962 ParentNode = AcpiNsGetParentNode (ChildNode); 963 if (ParentNode) 964 { 965 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Parent of %p [%4.4s] is %p [%4.4s]\n", 966 ChildNode, ChildNode->Name.Ascii, 967 ParentNode, ParentNode->Name.Ascii)); 968 969 if (ParentNode->Name.Integer) 970 { 971 return_VALUE ((ACPI_NAME) ParentNode->Name.Integer); 972 } 973 } 974 975 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "unable to find parent of %p (%4.4s)\n", 976 ChildNode, ChildNode->Name.Ascii)); 977 } 978 979 return_VALUE (ACPI_UNKNOWN_NAME); 980} 981 982 983#if defined(ACPI_DEBUG) || defined(ENABLE_DEBUGGER) 984 985/******************************************************************************* 986 * 987 * FUNCTION: AcpiNsExistDownstreamSibling 988 * 989 * PARAMETERS: *Node - pointer to first Node to examine 990 * 991 * RETURN: TRUE if sibling is found, FALSE otherwise 992 * 993 * DESCRIPTION: Searches remainder of scope being processed to determine 994 * whether there is a downstream sibling to the current 995 * object. This function is used to determine what type of 996 * line drawing character to use when displaying namespace 997 * trees. 998 * 999 ******************************************************************************/ 1000 1001BOOLEAN 1002AcpiNsExistDownstreamSibling ( 1003 ACPI_NAMESPACE_NODE *Node) 1004{ 1005 1006 if (!Node) 1007 { 1008 return (FALSE); 1009 } 1010 1011 if (Node->Name.Integer) 1012 { 1013 return (TRUE); 1014 } 1015 1016 return (FALSE); 1017} 1018 1019#endif /* ACPI_DEBUG */ 1020 1021 1022/******************************************************************************* 1023 * 1024 * FUNCTION: AcpiNsGetParentNode 1025 * 1026 * PARAMETERS: Node - Current table entry 1027 * 1028 * RETURN: Parent entry of the given entry 1029 * 1030 * DESCRIPTION: Obtain the parent entry for a given entry in the namespace. 1031 * 1032 ******************************************************************************/ 1033 1034 1035ACPI_NAMESPACE_NODE * 1036AcpiNsGetParentNode ( 1037 ACPI_NAMESPACE_NODE *Node) 1038{ 1039 ACPI_FUNCTION_ENTRY (); 1040 1041 1042 if (!Node) 1043 { 1044 return (NULL); 1045 } 1046 1047 /* 1048 * Walk to the end of this peer list. 1049 * The last entry is marked with a flag and the peer 1050 * pointer is really a pointer back to the parent. 1051 * This saves putting a parent back pointer in each and 1052 * every named object! 1053 */ 1054 while (!(Node->Flags & ANOBJ_END_OF_PEER_LIST)) 1055 { 1056 Node = Node->Peer; 1057 } 1058 1059 1060 return (Node->Peer); 1061} 1062 1063 1064/******************************************************************************* 1065 * 1066 * FUNCTION: AcpiNsGetNextValidNode 1067 * 1068 * PARAMETERS: Node - Current table entry 1069 * 1070 * RETURN: Next valid Node in the linked node list. NULL if no more valid 1071 * nodess 1072 * 1073 * DESCRIPTION: Find the next valid node within a name table. 1074 * Useful for implementing NULL-end-of-list loops. 1075 * 1076 ******************************************************************************/ 1077 1078 1079ACPI_NAMESPACE_NODE * 1080AcpiNsGetNextValidNode ( 1081 ACPI_NAMESPACE_NODE *Node) 1082{ 1083 1084 /* If we are at the end of this peer list, return NULL */ 1085 1086 if (Node->Flags & ANOBJ_END_OF_PEER_LIST) 1087 { 1088 return NULL; 1089 } 1090 1091 /* Otherwise just return the next peer */ 1092 1093 return (Node->Peer); 1094} 1095 1096 1097