1 /****************************************************************************** 2 * 3 * Module Name: nsutils - Utilities for accessing ACPI namespace, accessing 4 * parents and siblings and Scope manipulation 5 * $Revision: 1.157 $ 6 * 7 *****************************************************************************/ 8 9 /****************************************************************************** 10 * 11 * 1. Copyright Notice 12 * 13 * Some or all of this work - Copyright (c) 1999 - 2008, 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" 123 124 #define _COMPONENT ACPI_NAMESPACE 125 ACPI_MODULE_NAME ("nsutils") 126 127 /* Local prototypes */ 128 129 static BOOLEAN 130 AcpiNsValidPathSeparator ( 131 char Sep); 132 133 #ifdef ACPI_OBSOLETE_FUNCTIONS 134 ACPI_NAME 135 AcpiNsFindParentName ( 136 ACPI_NAMESPACE_NODE *NodeToSearch); 137 #endif 138 139 140 /******************************************************************************* 141 * 142 * FUNCTION: AcpiNsReportError 143 * 144 * PARAMETERS: ModuleName - Caller's module name (for error output) 145 * LineNumber - Caller's line number (for error output) 146 * InternalName - Name or path of the namespace node 147 * LookupStatus - Exception code from NS lookup 148 * 149 * RETURN: None 150 * 151 * DESCRIPTION: Print warning message with full pathname 152 * 153 ******************************************************************************/ 154 155 void 156 AcpiNsReportError ( 157 const char *ModuleName, 158 UINT32 LineNumber, 159 const char *InternalName, 160 ACPI_STATUS LookupStatus) 161 { 162 ACPI_STATUS Status; 163 UINT32 BadName; 164 char *Name = NULL; 165 166 167 AcpiOsPrintf ("ACPI Error (%s-%04d): ", ModuleName, LineNumber); 168 169 if (LookupStatus == AE_BAD_CHARACTER) 170 { 171 /* There is a non-ascii character in the name */ 172 173 ACPI_MOVE_32_TO_32 (&BadName, InternalName); 174 AcpiOsPrintf ("[0x%4.4X] (NON-ASCII)", BadName); 175 } 176 else 177 { 178 /* Convert path to external format */ 179 180 Status = AcpiNsExternalizeName (ACPI_UINT32_MAX, 181 InternalName, NULL, &Name); 182 183 /* Print target name */ 184 185 if (ACPI_SUCCESS (Status)) 186 { 187 AcpiOsPrintf ("[%s]", Name); 188 } 189 else 190 { 191 AcpiOsPrintf ("[COULD NOT EXTERNALIZE NAME]"); 192 } 193 194 if (Name) 195 { 196 ACPI_FREE (Name); 197 } 198 } 199 200 AcpiOsPrintf (" Namespace lookup failure, %s\n", 201 AcpiFormatException (LookupStatus)); 202 } 203 204 205 /******************************************************************************* 206 * 207 * FUNCTION: AcpiNsReportMethodError 208 * 209 * PARAMETERS: ModuleName - Caller's module name (for error output) 210 * LineNumber - Caller's line number (for error output) 211 * Message - Error message to use on failure 212 * PrefixNode - Prefix relative to the path 213 * Path - Path to the node (optional) 214 * MethodStatus - Execution status 215 * 216 * RETURN: None 217 * 218 * DESCRIPTION: Print warning message with full pathname 219 * 220 ******************************************************************************/ 221 222 void 223 AcpiNsReportMethodError ( 224 const char *ModuleName, 225 UINT32 LineNumber, 226 const char *Message, 227 ACPI_NAMESPACE_NODE *PrefixNode, 228 const char *Path, 229 ACPI_STATUS MethodStatus) 230 { 231 ACPI_STATUS Status; 232 ACPI_NAMESPACE_NODE *Node = PrefixNode; 233 234 235 AcpiOsPrintf ("ACPI Error (%s-%04d): ", ModuleName, LineNumber); 236 237 if (Path) 238 { 239 Status = AcpiNsGetNode (PrefixNode, Path, ACPI_NS_NO_UPSEARCH, 240 &Node); 241 if (ACPI_FAILURE (Status)) 242 { 243 AcpiOsPrintf ("[Could not get node by pathname]"); 244 } 245 } 246 247 AcpiNsPrintNodePathname (Node, Message); 248 AcpiOsPrintf (", %s\n", AcpiFormatException (MethodStatus)); 249 } 250 251 252 /******************************************************************************* 253 * 254 * FUNCTION: AcpiNsPrintNodePathname 255 * 256 * PARAMETERS: Node - Object 257 * Message - Prefix message 258 * 259 * DESCRIPTION: Print an object's full namespace pathname 260 * Manages allocation/freeing of a pathname buffer 261 * 262 ******************************************************************************/ 263 264 void 265 AcpiNsPrintNodePathname ( 266 ACPI_NAMESPACE_NODE *Node, 267 const char *Message) 268 { 269 ACPI_BUFFER Buffer; 270 ACPI_STATUS Status; 271 272 273 if (!Node) 274 { 275 AcpiOsPrintf ("[NULL NAME]"); 276 return; 277 } 278 279 /* Convert handle to full pathname and print it (with supplied message) */ 280 281 Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER; 282 283 Status = AcpiNsHandleToPathname (Node, &Buffer); 284 if (ACPI_SUCCESS (Status)) 285 { 286 if (Message) 287 { 288 AcpiOsPrintf ("%s ", Message); 289 } 290 291 AcpiOsPrintf ("[%s] (Node %p)", (char *) Buffer.Pointer, Node); 292 ACPI_FREE (Buffer.Pointer); 293 } 294 } 295 296 297 /******************************************************************************* 298 * 299 * FUNCTION: AcpiNsValidRootPrefix 300 * 301 * PARAMETERS: Prefix - Character to be checked 302 * 303 * RETURN: TRUE if a valid prefix 304 * 305 * DESCRIPTION: Check if a character is a valid ACPI Root prefix 306 * 307 ******************************************************************************/ 308 309 BOOLEAN 310 AcpiNsValidRootPrefix ( 311 char Prefix) 312 { 313 314 return ((BOOLEAN) (Prefix == '\\')); 315 } 316 317 318 /******************************************************************************* 319 * 320 * FUNCTION: AcpiNsValidPathSeparator 321 * 322 * PARAMETERS: Sep - Character to be checked 323 * 324 * RETURN: TRUE if a valid path separator 325 * 326 * DESCRIPTION: Check if a character is a valid ACPI path separator 327 * 328 ******************************************************************************/ 329 330 static BOOLEAN 331 AcpiNsValidPathSeparator ( 332 char Sep) 333 { 334 335 return ((BOOLEAN) (Sep == '.')); 336 } 337 338 339 /******************************************************************************* 340 * 341 * FUNCTION: AcpiNsGetType 342 * 343 * PARAMETERS: Node - Parent Node to be examined 344 * 345 * RETURN: Type field from Node whose handle is passed 346 * 347 * DESCRIPTION: Return the type of a Namespace node 348 * 349 ******************************************************************************/ 350 351 ACPI_OBJECT_TYPE 352 AcpiNsGetType ( 353 ACPI_NAMESPACE_NODE *Node) 354 { 355 ACPI_FUNCTION_TRACE (NsGetType); 356 357 358 if (!Node) 359 { 360 ACPI_WARNING ((AE_INFO, "Null Node parameter")); 361 return_UINT32 (ACPI_TYPE_ANY); 362 } 363 364 return_UINT32 ((ACPI_OBJECT_TYPE) Node->Type); 365 } 366 367 368 /******************************************************************************* 369 * 370 * FUNCTION: AcpiNsLocal 371 * 372 * PARAMETERS: Type - A namespace object type 373 * 374 * RETURN: LOCAL if names must be found locally in objects of the 375 * passed type, 0 if enclosing scopes should be searched 376 * 377 * DESCRIPTION: Returns scope rule for the given object type. 378 * 379 ******************************************************************************/ 380 381 UINT32 382 AcpiNsLocal ( 383 ACPI_OBJECT_TYPE Type) 384 { 385 ACPI_FUNCTION_TRACE (NsLocal); 386 387 388 if (!AcpiUtValidObjectType (Type)) 389 { 390 /* Type code out of range */ 391 392 ACPI_WARNING ((AE_INFO, "Invalid Object Type %X", Type)); 393 return_UINT32 (ACPI_NS_NORMAL); 394 } 395 396 return_UINT32 ((UINT32) AcpiGbl_NsProperties[Type] & ACPI_NS_LOCAL); 397 } 398 399 400 /******************************************************************************* 401 * 402 * FUNCTION: AcpiNsGetInternalNameLength 403 * 404 * PARAMETERS: Info - Info struct initialized with the 405 * external name pointer. 406 * 407 * RETURN: None 408 * 409 * DESCRIPTION: Calculate the length of the internal (AML) namestring 410 * corresponding to the external (ASL) namestring. 411 * 412 ******************************************************************************/ 413 414 void 415 AcpiNsGetInternalNameLength ( 416 ACPI_NAMESTRING_INFO *Info) 417 { 418 const char *NextExternalChar; 419 UINT32 i; 420 421 422 ACPI_FUNCTION_ENTRY (); 423 424 425 NextExternalChar = Info->ExternalName; 426 Info->NumCarats = 0; 427 Info->NumSegments = 0; 428 Info->FullyQualified = FALSE; 429 430 /* 431 * For the internal name, the required length is 4 bytes per segment, plus 432 * 1 each for RootPrefix, MultiNamePrefixOp, segment count, trailing null 433 * (which is not really needed, but no there's harm in putting it there) 434 * 435 * strlen() + 1 covers the first NameSeg, which has no path separator 436 */ 437 if (AcpiNsValidRootPrefix (NextExternalChar[0])) 438 { 439 Info->FullyQualified = TRUE; 440 NextExternalChar++; 441 } 442 else 443 { 444 /* 445 * Handle Carat prefixes 446 */ 447 while (*NextExternalChar == '^') 448 { 449 Info->NumCarats++; 450 NextExternalChar++; 451 } 452 } 453 454 /* 455 * Determine the number of ACPI name "segments" by counting the number of 456 * path separators within the string. Start with one segment since the 457 * segment count is [(# separators) + 1], and zero separators is ok. 458 */ 459 if (*NextExternalChar) 460 { 461 Info->NumSegments = 1; 462 for (i = 0; NextExternalChar[i]; i++) 463 { 464 if (AcpiNsValidPathSeparator (NextExternalChar[i])) 465 { 466 Info->NumSegments++; 467 } 468 } 469 } 470 471 Info->Length = (ACPI_NAME_SIZE * Info->NumSegments) + 472 4 + Info->NumCarats; 473 474 Info->NextExternalChar = NextExternalChar; 475 } 476 477 478 /******************************************************************************* 479 * 480 * FUNCTION: AcpiNsBuildInternalName 481 * 482 * PARAMETERS: Info - Info struct fully initialized 483 * 484 * RETURN: Status 485 * 486 * DESCRIPTION: Construct the internal (AML) namestring 487 * corresponding to the external (ASL) namestring. 488 * 489 ******************************************************************************/ 490 491 ACPI_STATUS 492 AcpiNsBuildInternalName ( 493 ACPI_NAMESTRING_INFO *Info) 494 { 495 UINT32 NumSegments = Info->NumSegments; 496 char *InternalName = Info->InternalName; 497 const char *ExternalName = Info->NextExternalChar; 498 char *Result = NULL; 499 UINT32 i; 500 501 502 ACPI_FUNCTION_TRACE (NsBuildInternalName); 503 504 505 /* Setup the correct prefixes, counts, and pointers */ 506 507 if (Info->FullyQualified) 508 { 509 InternalName[0] = '\\'; 510 511 if (NumSegments <= 1) 512 { 513 Result = &InternalName[1]; 514 } 515 else if (NumSegments == 2) 516 { 517 InternalName[1] = AML_DUAL_NAME_PREFIX; 518 Result = &InternalName[2]; 519 } 520 else 521 { 522 InternalName[1] = AML_MULTI_NAME_PREFIX_OP; 523 InternalName[2] = (char) NumSegments; 524 Result = &InternalName[3]; 525 } 526 } 527 else 528 { 529 /* 530 * Not fully qualified. 531 * Handle Carats first, then append the name segments 532 */ 533 i = 0; 534 if (Info->NumCarats) 535 { 536 for (i = 0; i < Info->NumCarats; i++) 537 { 538 InternalName[i] = '^'; 539 } 540 } 541 542 if (NumSegments <= 1) 543 { 544 Result = &InternalName[i]; 545 } 546 else if (NumSegments == 2) 547 { 548 InternalName[i] = AML_DUAL_NAME_PREFIX; 549 Result = &InternalName[(ACPI_SIZE) i+1]; 550 } 551 else 552 { 553 InternalName[i] = AML_MULTI_NAME_PREFIX_OP; 554 InternalName[(ACPI_SIZE) i+1] = (char) NumSegments; 555 Result = &InternalName[(ACPI_SIZE) i+2]; 556 } 557 } 558 559 /* Build the name (minus path separators) */ 560 561 for (; NumSegments; NumSegments--) 562 { 563 for (i = 0; i < ACPI_NAME_SIZE; i++) 564 { 565 if (AcpiNsValidPathSeparator (*ExternalName) || 566 (*ExternalName == 0)) 567 { 568 /* Pad the segment with underscore(s) if segment is short */ 569 570 Result[i] = '_'; 571 } 572 else 573 { 574 /* Convert the character to uppercase and save it */ 575 576 Result[i] = (char) ACPI_TOUPPER ((int) *ExternalName); 577 ExternalName++; 578 } 579 } 580 581 /* Now we must have a path separator, or the pathname is bad */ 582 583 if (!AcpiNsValidPathSeparator (*ExternalName) && 584 (*ExternalName != 0)) 585 { 586 return_ACPI_STATUS (AE_BAD_PARAMETER); 587 } 588 589 /* Move on the next segment */ 590 591 ExternalName++; 592 Result += ACPI_NAME_SIZE; 593 } 594 595 /* Terminate the string */ 596 597 *Result = 0; 598 599 if (Info->FullyQualified) 600 { 601 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Returning [%p] (abs) \"\\%s\"\n", 602 InternalName, InternalName)); 603 } 604 else 605 { 606 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Returning [%p] (rel) \"%s\"\n", 607 InternalName, InternalName)); 608 } 609 610 return_ACPI_STATUS (AE_OK); 611 } 612 613 614 /******************************************************************************* 615 * 616 * FUNCTION: AcpiNsInternalizeName 617 * 618 * PARAMETERS: *ExternalName - External representation of name 619 * **Converted Name - Where to return the resulting 620 * internal represention of the name 621 * 622 * RETURN: Status 623 * 624 * DESCRIPTION: Convert an external representation (e.g. "\_PR_.CPU0") 625 * to internal form (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30) 626 * 627 *******************************************************************************/ 628 629 ACPI_STATUS 630 AcpiNsInternalizeName ( 631 const char *ExternalName, 632 char **ConvertedName) 633 { 634 char *InternalName; 635 ACPI_NAMESTRING_INFO Info; 636 ACPI_STATUS Status; 637 638 639 ACPI_FUNCTION_TRACE (NsInternalizeName); 640 641 642 if ((!ExternalName) || 643 (*ExternalName == 0) || 644 (!ConvertedName)) 645 { 646 return_ACPI_STATUS (AE_BAD_PARAMETER); 647 } 648 649 /* Get the length of the new internal name */ 650 651 Info.ExternalName = ExternalName; 652 AcpiNsGetInternalNameLength (&Info); 653 654 /* We need a segment to store the internal name */ 655 656 InternalName = ACPI_ALLOCATE_ZEROED (Info.Length); 657 if (!InternalName) 658 { 659 return_ACPI_STATUS (AE_NO_MEMORY); 660 } 661 662 /* Build the name */ 663 664 Info.InternalName = InternalName; 665 Status = AcpiNsBuildInternalName (&Info); 666 if (ACPI_FAILURE (Status)) 667 { 668 ACPI_FREE (InternalName); 669 return_ACPI_STATUS (Status); 670 } 671 672 *ConvertedName = InternalName; 673 return_ACPI_STATUS (AE_OK); 674 } 675 676 677 /******************************************************************************* 678 * 679 * FUNCTION: AcpiNsExternalizeName 680 * 681 * PARAMETERS: InternalNameLength - Lenth of the internal name below 682 * InternalName - Internal representation of name 683 * ConvertedNameLength - Where the length is returned 684 * ConvertedName - Where the resulting external name 685 * is returned 686 * 687 * RETURN: Status 688 * 689 * DESCRIPTION: Convert internal name (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30) 690 * to its external (printable) form (e.g. "\_PR_.CPU0") 691 * 692 ******************************************************************************/ 693 694 ACPI_STATUS 695 AcpiNsExternalizeName ( 696 UINT32 InternalNameLength, 697 const char *InternalName, 698 UINT32 *ConvertedNameLength, 699 char **ConvertedName) 700 { 701 UINT32 NamesIndex = 0; 702 UINT32 NumSegments = 0; 703 UINT32 RequiredLength; 704 UINT32 PrefixLength = 0; 705 UINT32 i = 0; 706 UINT32 j = 0; 707 708 709 ACPI_FUNCTION_TRACE (NsExternalizeName); 710 711 712 if (!InternalNameLength || 713 !InternalName || 714 !ConvertedName) 715 { 716 return_ACPI_STATUS (AE_BAD_PARAMETER); 717 } 718 719 /* 720 * Check for a prefix (one '\' | one or more '^'). 721 */ 722 switch (InternalName[0]) 723 { 724 case '\\': 725 PrefixLength = 1; 726 break; 727 728 case '^': 729 for (i = 0; i < InternalNameLength; i++) 730 { 731 if (InternalName[i] == '^') 732 { 733 PrefixLength = i + 1; 734 } 735 else 736 { 737 break; 738 } 739 } 740 741 if (i == InternalNameLength) 742 { 743 PrefixLength = i; 744 } 745 746 break; 747 748 default: 749 break; 750 } 751 752 /* 753 * Check for object names. Note that there could be 0-255 of these 754 * 4-byte elements. 755 */ 756 if (PrefixLength < InternalNameLength) 757 { 758 switch (InternalName[PrefixLength]) 759 { 760 case AML_MULTI_NAME_PREFIX_OP: 761 762 /* <count> 4-byte names */ 763 764 NamesIndex = PrefixLength + 2; 765 NumSegments = (UINT8) 766 InternalName[(ACPI_SIZE) PrefixLength + 1]; 767 break; 768 769 case AML_DUAL_NAME_PREFIX: 770 771 /* Two 4-byte names */ 772 773 NamesIndex = PrefixLength + 1; 774 NumSegments = 2; 775 break; 776 777 case 0: 778 779 /* NullName */ 780 781 NamesIndex = 0; 782 NumSegments = 0; 783 break; 784 785 default: 786 787 /* one 4-byte name */ 788 789 NamesIndex = PrefixLength; 790 NumSegments = 1; 791 break; 792 } 793 } 794 795 /* 796 * Calculate the length of ConvertedName, which equals the length 797 * of the prefix, length of all object names, length of any required 798 * punctuation ('.') between object names, plus the NULL terminator. 799 */ 800 RequiredLength = PrefixLength + (4 * NumSegments) + 801 ((NumSegments > 0) ? (NumSegments - 1) : 0) + 1; 802 803 /* 804 * Check to see if we're still in bounds. If not, there's a problem 805 * with InternalName (invalid format). 806 */ 807 if (RequiredLength > InternalNameLength) 808 { 809 ACPI_ERROR ((AE_INFO, "Invalid internal name")); 810 return_ACPI_STATUS (AE_BAD_PATHNAME); 811 } 812 813 /* 814 * Build ConvertedName 815 */ 816 *ConvertedName = ACPI_ALLOCATE_ZEROED (RequiredLength); 817 if (!(*ConvertedName)) 818 { 819 return_ACPI_STATUS (AE_NO_MEMORY); 820 } 821 822 j = 0; 823 824 for (i = 0; i < PrefixLength; i++) 825 { 826 (*ConvertedName)[j++] = InternalName[i]; 827 } 828 829 if (NumSegments > 0) 830 { 831 for (i = 0; i < NumSegments; i++) 832 { 833 if (i > 0) 834 { 835 (*ConvertedName)[j++] = '.'; 836 } 837 838 (*ConvertedName)[j++] = InternalName[NamesIndex++]; 839 (*ConvertedName)[j++] = InternalName[NamesIndex++]; 840 (*ConvertedName)[j++] = InternalName[NamesIndex++]; 841 (*ConvertedName)[j++] = InternalName[NamesIndex++]; 842 } 843 } 844 845 if (ConvertedNameLength) 846 { 847 *ConvertedNameLength = (UINT32) RequiredLength; 848 } 849 850 return_ACPI_STATUS (AE_OK); 851 } 852 853 854 /******************************************************************************* 855 * 856 * FUNCTION: AcpiNsMapHandleToNode 857 * 858 * PARAMETERS: Handle - Handle to be converted to an Node 859 * 860 * RETURN: A Name table entry pointer 861 * 862 * DESCRIPTION: Convert a namespace handle to a real Node 863 * 864 * Note: Real integer handles would allow for more verification 865 * and keep all pointers within this subsystem - however this introduces 866 * more (and perhaps unnecessary) overhead. 867 * 868 ******************************************************************************/ 869 870 ACPI_NAMESPACE_NODE * 871 AcpiNsMapHandleToNode ( 872 ACPI_HANDLE Handle) 873 { 874 875 ACPI_FUNCTION_ENTRY (); 876 877 878 /* 879 * Simple implementation 880 */ 881 if ((!Handle) || (Handle == ACPI_ROOT_OBJECT)) 882 { 883 return (AcpiGbl_RootNode); 884 } 885 886 /* We can at least attempt to verify the handle */ 887 888 if (ACPI_GET_DESCRIPTOR_TYPE (Handle) != ACPI_DESC_TYPE_NAMED) 889 { 890 return (NULL); 891 } 892 893 return (ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Handle)); 894 } 895 896 897 /******************************************************************************* 898 * 899 * FUNCTION: AcpiNsConvertEntryToHandle 900 * 901 * PARAMETERS: Node - Node to be converted to a Handle 902 * 903 * RETURN: A user handle 904 * 905 * DESCRIPTION: Convert a real Node to a namespace handle 906 * 907 ******************************************************************************/ 908 909 ACPI_HANDLE 910 AcpiNsConvertEntryToHandle ( 911 ACPI_NAMESPACE_NODE *Node) 912 { 913 914 915 /* 916 * Simple implementation for now; 917 */ 918 return ((ACPI_HANDLE) Node); 919 920 921 /* Example future implementation --------------------- 922 923 if (!Node) 924 { 925 return (NULL); 926 } 927 928 if (Node == AcpiGbl_RootNode) 929 { 930 return (ACPI_ROOT_OBJECT); 931 } 932 933 934 return ((ACPI_HANDLE) Node); 935 ------------------------------------------------------*/ 936 } 937 938 939 /******************************************************************************* 940 * 941 * FUNCTION: AcpiNsTerminate 942 * 943 * PARAMETERS: none 944 * 945 * RETURN: none 946 * 947 * DESCRIPTION: free memory allocated for namespace and ACPI table storage. 948 * 949 ******************************************************************************/ 950 951 void 952 AcpiNsTerminate ( 953 void) 954 { 955 ACPI_OPERAND_OBJECT *ObjDesc; 956 957 958 ACPI_FUNCTION_TRACE (NsTerminate); 959 960 961 /* 962 * 1) Free the entire namespace -- all nodes and objects 963 * 964 * Delete all object descriptors attached to namepsace nodes 965 */ 966 AcpiNsDeleteNamespaceSubtree (AcpiGbl_RootNode); 967 968 /* Detach any objects attached to the root */ 969 970 ObjDesc = AcpiNsGetAttachedObject (AcpiGbl_RootNode); 971 if (ObjDesc) 972 { 973 AcpiNsDetachObject (AcpiGbl_RootNode); 974 } 975 976 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Namespace freed\n")); 977 return_VOID; 978 } 979 980 981 /******************************************************************************* 982 * 983 * FUNCTION: AcpiNsOpensScope 984 * 985 * PARAMETERS: Type - A valid namespace type 986 * 987 * RETURN: NEWSCOPE if the passed type "opens a name scope" according 988 * to the ACPI specification, else 0 989 * 990 ******************************************************************************/ 991 992 UINT32 993 AcpiNsOpensScope ( 994 ACPI_OBJECT_TYPE Type) 995 { 996 ACPI_FUNCTION_TRACE_STR (NsOpensScope, AcpiUtGetTypeName (Type)); 997 998 999 if (!AcpiUtValidObjectType (Type)) 1000 { 1001 /* type code out of range */ 1002 1003 ACPI_WARNING ((AE_INFO, "Invalid Object Type %X", Type)); 1004 return_UINT32 (ACPI_NS_NORMAL); 1005 } 1006 1007 return_UINT32 (((UINT32) AcpiGbl_NsProperties[Type]) & ACPI_NS_NEWSCOPE); 1008 } 1009 1010 1011 /******************************************************************************* 1012 * 1013 * FUNCTION: AcpiNsGetNode 1014 * 1015 * PARAMETERS: *Pathname - Name to be found, in external (ASL) format. The 1016 * \ (backslash) and ^ (carat) prefixes, and the 1017 * . (period) to separate segments are supported. 1018 * PrefixNode - Root of subtree to be searched, or NS_ALL for the 1019 * root of the name space. If Name is fully 1020 * qualified (first INT8 is '\'), the passed value 1021 * of Scope will not be accessed. 1022 * Flags - Used to indicate whether to perform upsearch or 1023 * not. 1024 * ReturnNode - Where the Node is returned 1025 * 1026 * DESCRIPTION: Look up a name relative to a given scope and return the 1027 * corresponding Node. NOTE: Scope can be null. 1028 * 1029 * MUTEX: Locks namespace 1030 * 1031 ******************************************************************************/ 1032 1033 ACPI_STATUS 1034 AcpiNsGetNode ( 1035 ACPI_NAMESPACE_NODE *PrefixNode, 1036 const char *Pathname, 1037 UINT32 Flags, 1038 ACPI_NAMESPACE_NODE **ReturnNode) 1039 { 1040 ACPI_GENERIC_STATE ScopeInfo; 1041 ACPI_STATUS Status; 1042 char *InternalPath; 1043 1044 1045 ACPI_FUNCTION_TRACE_PTR (NsGetNode, Pathname); 1046 1047 1048 if (!Pathname) 1049 { 1050 *ReturnNode = PrefixNode; 1051 if (!PrefixNode) 1052 { 1053 *ReturnNode = AcpiGbl_RootNode; 1054 } 1055 return_ACPI_STATUS (AE_OK); 1056 } 1057 1058 /* Convert path to internal representation */ 1059 1060 Status = AcpiNsInternalizeName (Pathname, &InternalPath); 1061 if (ACPI_FAILURE (Status)) 1062 { 1063 return_ACPI_STATUS (Status); 1064 } 1065 1066 /* Must lock namespace during lookup */ 1067 1068 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 1069 if (ACPI_FAILURE (Status)) 1070 { 1071 goto Cleanup; 1072 } 1073 1074 /* Setup lookup scope (search starting point) */ 1075 1076 ScopeInfo.Scope.Node = PrefixNode; 1077 1078 /* Lookup the name in the namespace */ 1079 1080 Status = AcpiNsLookup (&ScopeInfo, InternalPath, ACPI_TYPE_ANY, 1081 ACPI_IMODE_EXECUTE, (Flags | ACPI_NS_DONT_OPEN_SCOPE), 1082 NULL, ReturnNode); 1083 if (ACPI_FAILURE (Status)) 1084 { 1085 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "%s, %s\n", 1086 Pathname, AcpiFormatException (Status))); 1087 } 1088 1089 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 1090 1091 Cleanup: 1092 ACPI_FREE (InternalPath); 1093 return_ACPI_STATUS (Status); 1094 } 1095 1096 1097 /******************************************************************************* 1098 * 1099 * FUNCTION: AcpiNsGetParentNode 1100 * 1101 * PARAMETERS: Node - Current table entry 1102 * 1103 * RETURN: Parent entry of the given entry 1104 * 1105 * DESCRIPTION: Obtain the parent entry for a given entry in the namespace. 1106 * 1107 ******************************************************************************/ 1108 1109 ACPI_NAMESPACE_NODE * 1110 AcpiNsGetParentNode ( 1111 ACPI_NAMESPACE_NODE *Node) 1112 { 1113 ACPI_FUNCTION_ENTRY (); 1114 1115 1116 if (!Node) 1117 { 1118 return (NULL); 1119 } 1120 1121 /* 1122 * Walk to the end of this peer list. The last entry is marked with a flag 1123 * and the peer pointer is really a pointer back to the parent. This saves 1124 * putting a parent back pointer in each and every named object! 1125 */ 1126 while (!(Node->Flags & ANOBJ_END_OF_PEER_LIST)) 1127 { 1128 Node = Node->Peer; 1129 } 1130 1131 return (Node->Peer); 1132 } 1133 1134 1135 /******************************************************************************* 1136 * 1137 * FUNCTION: AcpiNsGetNextValidNode 1138 * 1139 * PARAMETERS: Node - Current table entry 1140 * 1141 * RETURN: Next valid Node in the linked node list. NULL if no more valid 1142 * nodes. 1143 * 1144 * DESCRIPTION: Find the next valid node within a name table. 1145 * Useful for implementing NULL-end-of-list loops. 1146 * 1147 ******************************************************************************/ 1148 1149 ACPI_NAMESPACE_NODE * 1150 AcpiNsGetNextValidNode ( 1151 ACPI_NAMESPACE_NODE *Node) 1152 { 1153 1154 /* If we are at the end of this peer list, return NULL */ 1155 1156 if (Node->Flags & ANOBJ_END_OF_PEER_LIST) 1157 { 1158 return NULL; 1159 } 1160 1161 /* Otherwise just return the next peer */ 1162 1163 return (Node->Peer); 1164 } 1165 1166 1167 #ifdef ACPI_OBSOLETE_FUNCTIONS 1168 /******************************************************************************* 1169 * 1170 * FUNCTION: AcpiNsFindParentName 1171 * 1172 * PARAMETERS: *ChildNode - Named Obj whose name is to be found 1173 * 1174 * RETURN: The ACPI name 1175 * 1176 * DESCRIPTION: Search for the given obj in its parent scope and return the 1177 * name segment, or "????" if the parent name can't be found 1178 * (which "should not happen"). 1179 * 1180 ******************************************************************************/ 1181 1182 ACPI_NAME 1183 AcpiNsFindParentName ( 1184 ACPI_NAMESPACE_NODE *ChildNode) 1185 { 1186 ACPI_NAMESPACE_NODE *ParentNode; 1187 1188 1189 ACPI_FUNCTION_TRACE (NsFindParentName); 1190 1191 1192 if (ChildNode) 1193 { 1194 /* Valid entry. Get the parent Node */ 1195 1196 ParentNode = AcpiNsGetParentNode (ChildNode); 1197 if (ParentNode) 1198 { 1199 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 1200 "Parent of %p [%4.4s] is %p [%4.4s]\n", 1201 ChildNode, AcpiUtGetNodeName (ChildNode), 1202 ParentNode, AcpiUtGetNodeName (ParentNode))); 1203 1204 if (ParentNode->Name.Integer) 1205 { 1206 return_VALUE ((ACPI_NAME) ParentNode->Name.Integer); 1207 } 1208 } 1209 1210 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 1211 "Unable to find parent of %p (%4.4s)\n", 1212 ChildNode, AcpiUtGetNodeName (ChildNode))); 1213 } 1214 1215 return_VALUE (ACPI_UNKNOWN_NAME); 1216 } 1217 #endif 1218 1219 1220