1/****************************************************************************** 2 * 3 * Module Name: nsutils - Utilities for accessing ACPI namespace, accessing 4 * parents and siblings and Scope manipulation 5 * 6 *****************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2009, 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 __NSUTILS_C__ 118 119#include <contrib/dev/acpica/include/acpi.h> 120#include <contrib/dev/acpica/include/accommon.h> 121#include <contrib/dev/acpica/include/acnamesp.h> 122#include <contrib/dev/acpica/include/amlcode.h> 123 124#define _COMPONENT ACPI_NAMESPACE 125 ACPI_MODULE_NAME ("nsutils") 126 127/* Local prototypes */ 128 129static BOOLEAN 130AcpiNsValidPathSeparator ( 131 char Sep); 132 133#ifdef ACPI_OBSOLETE_FUNCTIONS 134ACPI_NAME 135AcpiNsFindParentName ( 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 155void 156AcpiNsReportError ( 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, ACPI_CAST_PTR (UINT32, 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 222void 223AcpiNsReportMethodError ( 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 264void 265AcpiNsPrintNodePathname ( 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 309BOOLEAN 310AcpiNsValidRootPrefix ( 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 330static BOOLEAN 331AcpiNsValidPathSeparator ( 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 351ACPI_OBJECT_TYPE 352AcpiNsGetType ( 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 381UINT32 382AcpiNsLocal ( 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 414void 415AcpiNsGetInternalNameLength ( 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)) 438 { 439 Info->FullyQualified = TRUE; 440 NextExternalChar++; 441 442 /* Skip redundant RootPrefix, like \\_SB.PCI0.SBRG.EC0 */ 443 444 while (AcpiNsValidRootPrefix (*NextExternalChar)) 445 { 446 NextExternalChar++; 447 } 448 } 449 else 450 { 451 /* Handle Carat prefixes */ 452 453 while (*NextExternalChar == '^') 454 { 455 Info->NumCarats++; 456 NextExternalChar++; 457 } 458 } 459 460 /* 461 * Determine the number of ACPI name "segments" by counting the number of 462 * path separators within the string. Start with one segment since the 463 * segment count is [(# separators) + 1], and zero separators is ok. 464 */ 465 if (*NextExternalChar) 466 { 467 Info->NumSegments = 1; 468 for (i = 0; NextExternalChar[i]; i++) 469 { 470 if (AcpiNsValidPathSeparator (NextExternalChar[i])) 471 { 472 Info->NumSegments++; 473 } 474 } 475 } 476 477 Info->Length = (ACPI_NAME_SIZE * Info->NumSegments) + 478 4 + Info->NumCarats; 479 480 Info->NextExternalChar = NextExternalChar; 481} 482 483 484/******************************************************************************* 485 * 486 * FUNCTION: AcpiNsBuildInternalName 487 * 488 * PARAMETERS: Info - Info struct fully initialized 489 * 490 * RETURN: Status 491 * 492 * DESCRIPTION: Construct the internal (AML) namestring 493 * corresponding to the external (ASL) namestring. 494 * 495 ******************************************************************************/ 496 497ACPI_STATUS 498AcpiNsBuildInternalName ( 499 ACPI_NAMESTRING_INFO *Info) 500{ 501 UINT32 NumSegments = Info->NumSegments; 502 char *InternalName = Info->InternalName; 503 const char *ExternalName = Info->NextExternalChar; 504 char *Result = NULL; 505 UINT32 i; 506 507 508 ACPI_FUNCTION_TRACE (NsBuildInternalName); 509 510 511 /* Setup the correct prefixes, counts, and pointers */ 512 513 if (Info->FullyQualified) 514 { 515 InternalName[0] = '\\'; 516 517 if (NumSegments <= 1) 518 { 519 Result = &InternalName[1]; 520 } 521 else if (NumSegments == 2) 522 { 523 InternalName[1] = AML_DUAL_NAME_PREFIX; 524 Result = &InternalName[2]; 525 } 526 else 527 { 528 InternalName[1] = AML_MULTI_NAME_PREFIX_OP; 529 InternalName[2] = (char) NumSegments; 530 Result = &InternalName[3]; 531 } 532 } 533 else 534 { 535 /* 536 * Not fully qualified. 537 * Handle Carats first, then append the name segments 538 */ 539 i = 0; 540 if (Info->NumCarats) 541 { 542 for (i = 0; i < Info->NumCarats; i++) 543 { 544 InternalName[i] = '^'; 545 } 546 } 547 548 if (NumSegments <= 1) 549 { 550 Result = &InternalName[i]; 551 } 552 else if (NumSegments == 2) 553 { 554 InternalName[i] = AML_DUAL_NAME_PREFIX; 555 Result = &InternalName[(ACPI_SIZE) i+1]; 556 } 557 else 558 { 559 InternalName[i] = AML_MULTI_NAME_PREFIX_OP; 560 InternalName[(ACPI_SIZE) i+1] = (char) NumSegments; 561 Result = &InternalName[(ACPI_SIZE) i+2]; 562 } 563 } 564 565 /* Build the name (minus path separators) */ 566 567 for (; NumSegments; NumSegments--) 568 { 569 for (i = 0; i < ACPI_NAME_SIZE; i++) 570 { 571 if (AcpiNsValidPathSeparator (*ExternalName) || 572 (*ExternalName == 0)) 573 { 574 /* Pad the segment with underscore(s) if segment is short */ 575 576 Result[i] = '_'; 577 } 578 else 579 { 580 /* Convert the character to uppercase and save it */ 581 582 Result[i] = (char) ACPI_TOUPPER ((int) *ExternalName); 583 ExternalName++; 584 } 585 } 586 587 /* Now we must have a path separator, or the pathname is bad */ 588 589 if (!AcpiNsValidPathSeparator (*ExternalName) && 590 (*ExternalName != 0)) 591 { 592 return_ACPI_STATUS (AE_BAD_PARAMETER); 593 } 594 595 /* Move on the next segment */ 596 597 ExternalName++; 598 Result += ACPI_NAME_SIZE; 599 } 600 601 /* Terminate the string */ 602 603 *Result = 0; 604 605 if (Info->FullyQualified) 606 { 607 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Returning [%p] (abs) \"\\%s\"\n", 608 InternalName, InternalName)); 609 } 610 else 611 { 612 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Returning [%p] (rel) \"%s\"\n", 613 InternalName, InternalName)); 614 } 615 616 return_ACPI_STATUS (AE_OK); 617} 618 619 620/******************************************************************************* 621 * 622 * FUNCTION: AcpiNsInternalizeName 623 * 624 * PARAMETERS: *ExternalName - External representation of name 625 * **Converted Name - Where to return the resulting 626 * internal represention of the name 627 * 628 * RETURN: Status 629 * 630 * DESCRIPTION: Convert an external representation (e.g. "\_PR_.CPU0") 631 * to internal form (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30) 632 * 633 *******************************************************************************/ 634 635ACPI_STATUS 636AcpiNsInternalizeName ( 637 const char *ExternalName, 638 char **ConvertedName) 639{ 640 char *InternalName; 641 ACPI_NAMESTRING_INFO Info; 642 ACPI_STATUS Status; 643 644 645 ACPI_FUNCTION_TRACE (NsInternalizeName); 646 647 648 if ((!ExternalName) || 649 (*ExternalName == 0) || 650 (!ConvertedName)) 651 { 652 return_ACPI_STATUS (AE_BAD_PARAMETER); 653 } 654 655 /* Get the length of the new internal name */ 656 657 Info.ExternalName = ExternalName; 658 AcpiNsGetInternalNameLength (&Info); 659 660 /* We need a segment to store the internal name */ 661 662 InternalName = ACPI_ALLOCATE_ZEROED (Info.Length); 663 if (!InternalName) 664 { 665 return_ACPI_STATUS (AE_NO_MEMORY); 666 } 667 668 /* Build the name */ 669 670 Info.InternalName = InternalName; 671 Status = AcpiNsBuildInternalName (&Info); 672 if (ACPI_FAILURE (Status)) 673 { 674 ACPI_FREE (InternalName); 675 return_ACPI_STATUS (Status); 676 } 677 678 *ConvertedName = InternalName; 679 return_ACPI_STATUS (AE_OK); 680} 681 682 683/******************************************************************************* 684 * 685 * FUNCTION: AcpiNsExternalizeName 686 * 687 * PARAMETERS: InternalNameLength - Lenth of the internal name below 688 * InternalName - Internal representation of name 689 * ConvertedNameLength - Where the length is returned 690 * ConvertedName - Where the resulting external name 691 * is returned 692 * 693 * RETURN: Status 694 * 695 * DESCRIPTION: Convert internal name (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30) 696 * to its external (printable) form (e.g. "\_PR_.CPU0") 697 * 698 ******************************************************************************/ 699 700ACPI_STATUS 701AcpiNsExternalizeName ( 702 UINT32 InternalNameLength, 703 const char *InternalName, 704 UINT32 *ConvertedNameLength, 705 char **ConvertedName) 706{ 707 UINT32 NamesIndex = 0; 708 UINT32 NumSegments = 0; 709 UINT32 RequiredLength; 710 UINT32 PrefixLength = 0; 711 UINT32 i = 0; 712 UINT32 j = 0; 713 714 715 ACPI_FUNCTION_TRACE (NsExternalizeName); 716 717 718 if (!InternalNameLength || 719 !InternalName || 720 !ConvertedName) 721 { 722 return_ACPI_STATUS (AE_BAD_PARAMETER); 723 } 724 725 /* Check for a prefix (one '\' | one or more '^') */ 726 727 switch (InternalName[0]) 728 { 729 case '\\': 730 PrefixLength = 1; 731 break; 732 733 case '^': 734 for (i = 0; i < InternalNameLength; i++) 735 { 736 if (InternalName[i] == '^') 737 { 738 PrefixLength = i + 1; 739 } 740 else 741 { 742 break; 743 } 744 } 745 746 if (i == InternalNameLength) 747 { 748 PrefixLength = i; 749 } 750 751 break; 752 753 default: 754 break; 755 } 756 757 /* 758 * Check for object names. Note that there could be 0-255 of these 759 * 4-byte elements. 760 */ 761 if (PrefixLength < InternalNameLength) 762 { 763 switch (InternalName[PrefixLength]) 764 { 765 case AML_MULTI_NAME_PREFIX_OP: 766 767 /* <count> 4-byte names */ 768 769 NamesIndex = PrefixLength + 2; 770 NumSegments = (UINT8) 771 InternalName[(ACPI_SIZE) PrefixLength + 1]; 772 break; 773 774 case AML_DUAL_NAME_PREFIX: 775 776 /* Two 4-byte names */ 777 778 NamesIndex = PrefixLength + 1; 779 NumSegments = 2; 780 break; 781 782 case 0: 783 784 /* NullName */ 785 786 NamesIndex = 0; 787 NumSegments = 0; 788 break; 789 790 default: 791 792 /* one 4-byte name */ 793 794 NamesIndex = PrefixLength; 795 NumSegments = 1; 796 break; 797 } 798 } 799 800 /* 801 * Calculate the length of ConvertedName, which equals the length 802 * of the prefix, length of all object names, length of any required 803 * punctuation ('.') between object names, plus the NULL terminator. 804 */ 805 RequiredLength = PrefixLength + (4 * NumSegments) + 806 ((NumSegments > 0) ? (NumSegments - 1) : 0) + 1; 807 808 /* 809 * Check to see if we're still in bounds. If not, there's a problem 810 * with InternalName (invalid format). 811 */ 812 if (RequiredLength > InternalNameLength) 813 { 814 ACPI_ERROR ((AE_INFO, "Invalid internal name")); 815 return_ACPI_STATUS (AE_BAD_PATHNAME); 816 } 817 818 /* Build the ConvertedName */ 819 820 *ConvertedName = ACPI_ALLOCATE_ZEROED (RequiredLength); 821 if (!(*ConvertedName)) 822 { 823 return_ACPI_STATUS (AE_NO_MEMORY); 824 } 825 826 j = 0; 827 828 for (i = 0; i < PrefixLength; i++) 829 { 830 (*ConvertedName)[j++] = InternalName[i]; 831 } 832 833 if (NumSegments > 0) 834 { 835 for (i = 0; i < NumSegments; i++) 836 { 837 if (i > 0) 838 { 839 (*ConvertedName)[j++] = '.'; 840 } 841 842 (*ConvertedName)[j++] = InternalName[NamesIndex++]; 843 (*ConvertedName)[j++] = InternalName[NamesIndex++]; 844 (*ConvertedName)[j++] = InternalName[NamesIndex++]; 845 (*ConvertedName)[j++] = InternalName[NamesIndex++]; 846 } 847 } 848 849 if (ConvertedNameLength) 850 { 851 *ConvertedNameLength = (UINT32) RequiredLength; 852 } 853 854 return_ACPI_STATUS (AE_OK); 855} 856 857 858/******************************************************************************* 859 *
|
906 * FUNCTION: AcpiNsTerminate 907 * 908 * PARAMETERS: none 909 * 910 * RETURN: none 911 * 912 * DESCRIPTION: free memory allocated for namespace and ACPI table storage. 913 * 914 ******************************************************************************/ 915 916void 917AcpiNsTerminate ( 918 void) 919{ 920 ACPI_OPERAND_OBJECT *ObjDesc; 921 922 923 ACPI_FUNCTION_TRACE (NsTerminate); 924 925 926 /* 927 * 1) Free the entire namespace -- all nodes and objects 928 * 929 * Delete all object descriptors attached to namepsace nodes 930 */ 931 AcpiNsDeleteNamespaceSubtree (AcpiGbl_RootNode); 932 933 /* Detach any objects attached to the root */ 934 935 ObjDesc = AcpiNsGetAttachedObject (AcpiGbl_RootNode); 936 if (ObjDesc) 937 { 938 AcpiNsDetachObject (AcpiGbl_RootNode); 939 } 940 941 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Namespace freed\n")); 942 return_VOID; 943} 944 945 946/******************************************************************************* 947 * 948 * FUNCTION: AcpiNsOpensScope 949 * 950 * PARAMETERS: Type - A valid namespace type 951 * 952 * RETURN: NEWSCOPE if the passed type "opens a name scope" according 953 * to the ACPI specification, else 0 954 * 955 ******************************************************************************/ 956 957UINT32 958AcpiNsOpensScope ( 959 ACPI_OBJECT_TYPE Type) 960{ 961 ACPI_FUNCTION_TRACE_STR (NsOpensScope, AcpiUtGetTypeName (Type)); 962 963 964 if (!AcpiUtValidObjectType (Type)) 965 { 966 /* type code out of range */ 967 968 ACPI_WARNING ((AE_INFO, "Invalid Object Type %X", Type)); 969 return_UINT32 (ACPI_NS_NORMAL); 970 } 971 972 return_UINT32 (((UINT32) AcpiGbl_NsProperties[Type]) & ACPI_NS_NEWSCOPE); 973} 974 975 976/******************************************************************************* 977 * 978 * FUNCTION: AcpiNsGetNode 979 * 980 * PARAMETERS: *Pathname - Name to be found, in external (ASL) format. The 981 * \ (backslash) and ^ (carat) prefixes, and the 982 * . (period) to separate segments are supported. 983 * PrefixNode - Root of subtree to be searched, or NS_ALL for the 984 * root of the name space. If Name is fully 985 * qualified (first INT8 is '\'), the passed value 986 * of Scope will not be accessed. 987 * Flags - Used to indicate whether to perform upsearch or 988 * not. 989 * ReturnNode - Where the Node is returned 990 * 991 * DESCRIPTION: Look up a name relative to a given scope and return the 992 * corresponding Node. NOTE: Scope can be null. 993 * 994 * MUTEX: Locks namespace 995 * 996 ******************************************************************************/ 997 998ACPI_STATUS 999AcpiNsGetNode ( 1000 ACPI_NAMESPACE_NODE *PrefixNode, 1001 const char *Pathname, 1002 UINT32 Flags, 1003 ACPI_NAMESPACE_NODE **ReturnNode) 1004{ 1005 ACPI_GENERIC_STATE ScopeInfo; 1006 ACPI_STATUS Status; 1007 char *InternalPath; 1008 1009 1010 ACPI_FUNCTION_TRACE_PTR (NsGetNode, ACPI_CAST_PTR (char, Pathname)); 1011 1012 1013 if (!Pathname) 1014 { 1015 *ReturnNode = PrefixNode; 1016 if (!PrefixNode) 1017 { 1018 *ReturnNode = AcpiGbl_RootNode; 1019 } 1020 return_ACPI_STATUS (AE_OK); 1021 } 1022 1023 /* Convert path to internal representation */ 1024 1025 Status = AcpiNsInternalizeName (Pathname, &InternalPath); 1026 if (ACPI_FAILURE (Status)) 1027 { 1028 return_ACPI_STATUS (Status); 1029 } 1030 1031 /* Must lock namespace during lookup */ 1032 1033 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 1034 if (ACPI_FAILURE (Status)) 1035 { 1036 goto Cleanup; 1037 } 1038 1039 /* Setup lookup scope (search starting point) */ 1040 1041 ScopeInfo.Scope.Node = PrefixNode; 1042 1043 /* Lookup the name in the namespace */ 1044 1045 Status = AcpiNsLookup (&ScopeInfo, InternalPath, ACPI_TYPE_ANY, 1046 ACPI_IMODE_EXECUTE, (Flags | ACPI_NS_DONT_OPEN_SCOPE), 1047 NULL, ReturnNode); 1048 if (ACPI_FAILURE (Status)) 1049 { 1050 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "%s, %s\n", 1051 Pathname, AcpiFormatException (Status))); 1052 } 1053 1054 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 1055 1056Cleanup: 1057 ACPI_FREE (InternalPath); 1058 return_ACPI_STATUS (Status); 1059} 1060 1061 1062/******************************************************************************* 1063 * 1064 * FUNCTION: AcpiNsGetParentNode 1065 * 1066 * PARAMETERS: Node - Current table entry 1067 * 1068 * RETURN: Parent entry of the given entry 1069 * 1070 * DESCRIPTION: Obtain the parent entry for a given entry in the namespace. 1071 * 1072 ******************************************************************************/ 1073 1074ACPI_NAMESPACE_NODE * 1075AcpiNsGetParentNode ( 1076 ACPI_NAMESPACE_NODE *Node) 1077{ 1078 ACPI_FUNCTION_ENTRY (); 1079 1080 1081 if (!Node) 1082 { 1083 return (NULL); 1084 } 1085 1086 /* 1087 * Walk to the end of this peer list. The last entry is marked with a flag 1088 * and the peer pointer is really a pointer back to the parent. This saves 1089 * putting a parent back pointer in each and every named object! 1090 */ 1091 while (!(Node->Flags & ANOBJ_END_OF_PEER_LIST)) 1092 { 1093 Node = Node->Peer; 1094 } 1095 1096 return (Node->Peer); 1097} 1098 1099 1100/******************************************************************************* 1101 * 1102 * FUNCTION: AcpiNsGetNextValidNode 1103 * 1104 * PARAMETERS: Node - Current table entry 1105 * 1106 * RETURN: Next valid Node in the linked node list. NULL if no more valid 1107 * nodes. 1108 * 1109 * DESCRIPTION: Find the next valid node within a name table. 1110 * Useful for implementing NULL-end-of-list loops. 1111 * 1112 ******************************************************************************/ 1113 1114ACPI_NAMESPACE_NODE * 1115AcpiNsGetNextValidNode ( 1116 ACPI_NAMESPACE_NODE *Node) 1117{ 1118 1119 /* If we are at the end of this peer list, return NULL */ 1120 1121 if (Node->Flags & ANOBJ_END_OF_PEER_LIST) 1122 { 1123 return NULL; 1124 } 1125 1126 /* Otherwise just return the next peer */ 1127 1128 return (Node->Peer); 1129} 1130 1131 1132#ifdef ACPI_OBSOLETE_FUNCTIONS 1133/******************************************************************************* 1134 * 1135 * FUNCTION: AcpiNsFindParentName 1136 * 1137 * PARAMETERS: *ChildNode - Named Obj whose name is to be found 1138 * 1139 * RETURN: The ACPI name 1140 * 1141 * DESCRIPTION: Search for the given obj in its parent scope and return the 1142 * name segment, or "????" if the parent name can't be found 1143 * (which "should not happen"). 1144 * 1145 ******************************************************************************/ 1146 1147ACPI_NAME 1148AcpiNsFindParentName ( 1149 ACPI_NAMESPACE_NODE *ChildNode) 1150{ 1151 ACPI_NAMESPACE_NODE *ParentNode; 1152 1153 1154 ACPI_FUNCTION_TRACE (NsFindParentName); 1155 1156 1157 if (ChildNode) 1158 { 1159 /* Valid entry. Get the parent Node */ 1160 1161 ParentNode = AcpiNsGetParentNode (ChildNode); 1162 if (ParentNode) 1163 { 1164 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 1165 "Parent of %p [%4.4s] is %p [%4.4s]\n", 1166 ChildNode, AcpiUtGetNodeName (ChildNode), 1167 ParentNode, AcpiUtGetNodeName (ParentNode))); 1168 1169 if (ParentNode->Name.Integer) 1170 { 1171 return_VALUE ((ACPI_NAME) ParentNode->Name.Integer); 1172 } 1173 } 1174 1175 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 1176 "Unable to find parent of %p (%4.4s)\n", 1177 ChildNode, AcpiUtGetNodeName (ChildNode))); 1178 } 1179 1180 return_VALUE (ACPI_UNKNOWN_NAME); 1181} 1182#endif 1183 1184
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