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 - 2017, 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 * Alternatively, you may choose to be licensed under the terms of the 118 * following license: 119 * 120 * Redistribution and use in source and binary forms, with or without 121 * modification, are permitted provided that the following conditions 122 * are met: 123 * 1. Redistributions of source code must retain the above copyright 124 * notice, this list of conditions, and the following disclaimer, 125 * without modification. 126 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 127 * substantially similar to the "NO WARRANTY" disclaimer below 128 * ("Disclaimer") and any redistribution must be conditioned upon 129 * including a substantially similar Disclaimer requirement for further 130 * binary redistribution. 131 * 3. Neither the names of the above-listed copyright holders nor the names 132 * of any contributors may be used to endorse or promote products derived 133 * from this software without specific prior written permission. 134 * 135 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 136 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 137 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 138 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 139 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 140 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 141 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 142 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 143 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 144 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 145 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 146 * 147 * Alternatively, you may choose to be licensed under the terms of the 148 * GNU General Public License ("GPL") version 2 as published by the Free 149 * Software Foundation. 150 * 151 *****************************************************************************/ 152 153 #include <contrib/dev/acpica/include/acpi.h> 154 #include <contrib/dev/acpica/include/accommon.h> 155 #include <contrib/dev/acpica/include/acnamesp.h> 156 #include <contrib/dev/acpica/include/amlcode.h> 157 158 #define _COMPONENT ACPI_NAMESPACE 159 ACPI_MODULE_NAME ("nsutils") 160 161 /* Local prototypes */ 162 163 #ifdef ACPI_OBSOLETE_FUNCTIONS 164 ACPI_NAME 165 AcpiNsFindParentName ( 166 ACPI_NAMESPACE_NODE *NodeToSearch); 167 #endif 168 169 170 /******************************************************************************* 171 * 172 * FUNCTION: AcpiNsPrintNodePathname 173 * 174 * PARAMETERS: Node - Object 175 * Message - Prefix message 176 * 177 * DESCRIPTION: Print an object's full namespace pathname 178 * Manages allocation/freeing of a pathname buffer 179 * 180 ******************************************************************************/ 181 182 void 183 AcpiNsPrintNodePathname ( 184 ACPI_NAMESPACE_NODE *Node, 185 const char *Message) 186 { 187 ACPI_BUFFER Buffer; 188 ACPI_STATUS Status; 189 190 191 if (!Node) 192 { 193 AcpiOsPrintf ("[NULL NAME]"); 194 return; 195 } 196 197 /* Convert handle to full pathname and print it (with supplied message) */ 198 199 Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER; 200 201 Status = AcpiNsHandleToPathname (Node, &Buffer, TRUE); 202 if (ACPI_SUCCESS (Status)) 203 { 204 if (Message) 205 { 206 AcpiOsPrintf ("%s ", Message); 207 } 208 209 AcpiOsPrintf ("%s", (char *) Buffer.Pointer); 210 ACPI_FREE (Buffer.Pointer); 211 } 212 } 213 214 215 /******************************************************************************* 216 * 217 * FUNCTION: AcpiNsGetType 218 * 219 * PARAMETERS: Node - Parent Node to be examined 220 * 221 * RETURN: Type field from Node whose handle is passed 222 * 223 * DESCRIPTION: Return the type of a Namespace node 224 * 225 ******************************************************************************/ 226 227 ACPI_OBJECT_TYPE 228 AcpiNsGetType ( 229 ACPI_NAMESPACE_NODE *Node) 230 { 231 ACPI_FUNCTION_TRACE (NsGetType); 232 233 234 if (!Node) 235 { 236 ACPI_WARNING ((AE_INFO, "Null Node parameter")); 237 return_UINT8 (ACPI_TYPE_ANY); 238 } 239 240 return_UINT8 (Node->Type); 241 } 242 243 244 /******************************************************************************* 245 * 246 * FUNCTION: AcpiNsLocal 247 * 248 * PARAMETERS: Type - A namespace object type 249 * 250 * RETURN: LOCAL if names must be found locally in objects of the 251 * passed type, 0 if enclosing scopes should be searched 252 * 253 * DESCRIPTION: Returns scope rule for the given object type. 254 * 255 ******************************************************************************/ 256 257 UINT32 258 AcpiNsLocal ( 259 ACPI_OBJECT_TYPE Type) 260 { 261 ACPI_FUNCTION_TRACE (NsLocal); 262 263 264 if (!AcpiUtValidObjectType (Type)) 265 { 266 /* Type code out of range */ 267 268 ACPI_WARNING ((AE_INFO, "Invalid Object Type 0x%X", Type)); 269 return_UINT32 (ACPI_NS_NORMAL); 270 } 271 272 return_UINT32 (AcpiGbl_NsProperties[Type] & ACPI_NS_LOCAL); 273 } 274 275 276 /******************************************************************************* 277 * 278 * FUNCTION: AcpiNsGetInternalNameLength 279 * 280 * PARAMETERS: Info - Info struct initialized with the 281 * external name pointer. 282 * 283 * RETURN: None 284 * 285 * DESCRIPTION: Calculate the length of the internal (AML) namestring 286 * corresponding to the external (ASL) namestring. 287 * 288 ******************************************************************************/ 289 290 void 291 AcpiNsGetInternalNameLength ( 292 ACPI_NAMESTRING_INFO *Info) 293 { 294 const char *NextExternalChar; 295 UINT32 i; 296 297 298 ACPI_FUNCTION_ENTRY (); 299 300 301 NextExternalChar = Info->ExternalName; 302 Info->NumCarats = 0; 303 Info->NumSegments = 0; 304 Info->FullyQualified = FALSE; 305 306 /* 307 * For the internal name, the required length is 4 bytes per segment, 308 * plus 1 each for RootPrefix, MultiNamePrefixOp, segment count, 309 * trailing null (which is not really needed, but no there's harm in 310 * putting it there) 311 * 312 * strlen() + 1 covers the first NameSeg, which has no path separator 313 */ 314 if (ACPI_IS_ROOT_PREFIX (*NextExternalChar)) 315 { 316 Info->FullyQualified = TRUE; 317 NextExternalChar++; 318 319 /* Skip redundant RootPrefix, like \\_SB.PCI0.SBRG.EC0 */ 320 321 while (ACPI_IS_ROOT_PREFIX (*NextExternalChar)) 322 { 323 NextExternalChar++; 324 } 325 } 326 else 327 { 328 /* Handle Carat prefixes */ 329 330 while (ACPI_IS_PARENT_PREFIX (*NextExternalChar)) 331 { 332 Info->NumCarats++; 333 NextExternalChar++; 334 } 335 } 336 337 /* 338 * Determine the number of ACPI name "segments" by counting the number of 339 * path separators within the string. Start with one segment since the 340 * segment count is [(# separators) + 1], and zero separators is ok. 341 */ 342 if (*NextExternalChar) 343 { 344 Info->NumSegments = 1; 345 for (i = 0; NextExternalChar[i]; i++) 346 { 347 if (ACPI_IS_PATH_SEPARATOR (NextExternalChar[i])) 348 { 349 Info->NumSegments++; 350 } 351 } 352 } 353 354 Info->Length = (ACPI_NAME_SIZE * Info->NumSegments) + 355 4 + Info->NumCarats; 356 357 Info->NextExternalChar = NextExternalChar; 358 } 359 360 361 /******************************************************************************* 362 * 363 * FUNCTION: AcpiNsBuildInternalName 364 * 365 * PARAMETERS: Info - Info struct fully initialized 366 * 367 * RETURN: Status 368 * 369 * DESCRIPTION: Construct the internal (AML) namestring 370 * corresponding to the external (ASL) namestring. 371 * 372 ******************************************************************************/ 373 374 ACPI_STATUS 375 AcpiNsBuildInternalName ( 376 ACPI_NAMESTRING_INFO *Info) 377 { 378 UINT32 NumSegments = Info->NumSegments; 379 char *InternalName = Info->InternalName; 380 const char *ExternalName = Info->NextExternalChar; 381 char *Result = NULL; 382 UINT32 i; 383 384 385 ACPI_FUNCTION_TRACE (NsBuildInternalName); 386 387 388 /* Setup the correct prefixes, counts, and pointers */ 389 390 if (Info->FullyQualified) 391 { 392 InternalName[0] = AML_ROOT_PREFIX; 393 394 if (NumSegments <= 1) 395 { 396 Result = &InternalName[1]; 397 } 398 else if (NumSegments == 2) 399 { 400 InternalName[1] = AML_DUAL_NAME_PREFIX; 401 Result = &InternalName[2]; 402 } 403 else 404 { 405 InternalName[1] = AML_MULTI_NAME_PREFIX; 406 InternalName[2] = (char) NumSegments; 407 Result = &InternalName[3]; 408 } 409 } 410 else 411 { 412 /* 413 * Not fully qualified. 414 * Handle Carats first, then append the name segments 415 */ 416 i = 0; 417 if (Info->NumCarats) 418 { 419 for (i = 0; i < Info->NumCarats; i++) 420 { 421 InternalName[i] = AML_PARENT_PREFIX; 422 } 423 } 424 425 if (NumSegments <= 1) 426 { 427 Result = &InternalName[i]; 428 } 429 else if (NumSegments == 2) 430 { 431 InternalName[i] = AML_DUAL_NAME_PREFIX; 432 Result = &InternalName[(ACPI_SIZE) i+1]; 433 } 434 else 435 { 436 InternalName[i] = AML_MULTI_NAME_PREFIX; 437 InternalName[(ACPI_SIZE) i+1] = (char) NumSegments; 438 Result = &InternalName[(ACPI_SIZE) i+2]; 439 } 440 } 441 442 /* Build the name (minus path separators) */ 443 444 for (; NumSegments; NumSegments--) 445 { 446 for (i = 0; i < ACPI_NAME_SIZE; i++) 447 { 448 if (ACPI_IS_PATH_SEPARATOR (*ExternalName) || 449 (*ExternalName == 0)) 450 { 451 /* Pad the segment with underscore(s) if segment is short */ 452 453 Result[i] = '_'; 454 } 455 else 456 { 457 /* Convert the character to uppercase and save it */ 458 459 Result[i] = (char) toupper ((int) *ExternalName); 460 ExternalName++; 461 } 462 } 463 464 /* Now we must have a path separator, or the pathname is bad */ 465 466 if (!ACPI_IS_PATH_SEPARATOR (*ExternalName) && 467 (*ExternalName != 0)) 468 { 469 return_ACPI_STATUS (AE_BAD_PATHNAME); 470 } 471 472 /* Move on the next segment */ 473 474 ExternalName++; 475 Result += ACPI_NAME_SIZE; 476 } 477 478 /* Terminate the string */ 479 480 *Result = 0; 481 482 if (Info->FullyQualified) 483 { 484 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Returning [%p] (abs) \"\\%s\"\n", 485 InternalName, InternalName)); 486 } 487 else 488 { 489 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Returning [%p] (rel) \"%s\"\n", 490 InternalName, InternalName)); 491 } 492 493 return_ACPI_STATUS (AE_OK); 494 } 495 496 497 /******************************************************************************* 498 * 499 * FUNCTION: AcpiNsInternalizeName 500 * 501 * PARAMETERS: *ExternalName - External representation of name 502 * **Converted Name - Where to return the resulting 503 * internal represention of the name 504 * 505 * RETURN: Status 506 * 507 * DESCRIPTION: Convert an external representation (e.g. "\_PR_.CPU0") 508 * to internal form (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30) 509 * 510 *******************************************************************************/ 511 512 ACPI_STATUS 513 AcpiNsInternalizeName ( 514 const char *ExternalName, 515 char **ConvertedName) 516 { 517 char *InternalName; 518 ACPI_NAMESTRING_INFO Info; 519 ACPI_STATUS Status; 520 521 522 ACPI_FUNCTION_TRACE (NsInternalizeName); 523 524 525 if ((!ExternalName) || 526 (*ExternalName == 0) || 527 (!ConvertedName)) 528 { 529 return_ACPI_STATUS (AE_BAD_PARAMETER); 530 } 531 532 /* Get the length of the new internal name */ 533 534 Info.ExternalName = ExternalName; 535 AcpiNsGetInternalNameLength (&Info); 536 537 /* We need a segment to store the internal name */ 538 539 InternalName = ACPI_ALLOCATE_ZEROED (Info.Length); 540 if (!InternalName) 541 { 542 return_ACPI_STATUS (AE_NO_MEMORY); 543 } 544 545 /* Build the name */ 546 547 Info.InternalName = InternalName; 548 Status = AcpiNsBuildInternalName (&Info); 549 if (ACPI_FAILURE (Status)) 550 { 551 ACPI_FREE (InternalName); 552 return_ACPI_STATUS (Status); 553 } 554 555 *ConvertedName = InternalName; 556 return_ACPI_STATUS (AE_OK); 557 } 558 559 560 /******************************************************************************* 561 * 562 * FUNCTION: AcpiNsExternalizeName 563 * 564 * PARAMETERS: InternalNameLength - Lenth of the internal name below 565 * InternalName - Internal representation of name 566 * ConvertedNameLength - Where the length is returned 567 * ConvertedName - Where the resulting external name 568 * is returned 569 * 570 * RETURN: Status 571 * 572 * DESCRIPTION: Convert internal name (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30) 573 * to its external (printable) form (e.g. "\_PR_.CPU0") 574 * 575 ******************************************************************************/ 576 577 ACPI_STATUS 578 AcpiNsExternalizeName ( 579 UINT32 InternalNameLength, 580 const char *InternalName, 581 UINT32 *ConvertedNameLength, 582 char **ConvertedName) 583 { 584 UINT32 NamesIndex = 0; 585 UINT32 NumSegments = 0; 586 UINT32 RequiredLength; 587 UINT32 PrefixLength = 0; 588 UINT32 i = 0; 589 UINT32 j = 0; 590 591 592 ACPI_FUNCTION_TRACE (NsExternalizeName); 593 594 595 if (!InternalNameLength || 596 !InternalName || 597 !ConvertedName) 598 { 599 return_ACPI_STATUS (AE_BAD_PARAMETER); 600 } 601 602 /* Check for a prefix (one '\' | one or more '^') */ 603 604 switch (InternalName[0]) 605 { 606 case AML_ROOT_PREFIX: 607 608 PrefixLength = 1; 609 break; 610 611 case AML_PARENT_PREFIX: 612 613 for (i = 0; i < InternalNameLength; i++) 614 { 615 if (ACPI_IS_PARENT_PREFIX (InternalName[i])) 616 { 617 PrefixLength = i + 1; 618 } 619 else 620 { 621 break; 622 } 623 } 624 625 if (i == InternalNameLength) 626 { 627 PrefixLength = i; 628 } 629 630 break; 631 632 default: 633 634 break; 635 } 636 637 /* 638 * Check for object names. Note that there could be 0-255 of these 639 * 4-byte elements. 640 */ 641 if (PrefixLength < InternalNameLength) 642 { 643 switch (InternalName[PrefixLength]) 644 { 645 case AML_MULTI_NAME_PREFIX: 646 647 /* <count> 4-byte names */ 648 649 NamesIndex = PrefixLength + 2; 650 NumSegments = (UINT8) 651 InternalName[(ACPI_SIZE) PrefixLength + 1]; 652 break; 653 654 case AML_DUAL_NAME_PREFIX: 655 656 /* Two 4-byte names */ 657 658 NamesIndex = PrefixLength + 1; 659 NumSegments = 2; 660 break; 661 662 case 0: 663 664 /* NullName */ 665 666 NamesIndex = 0; 667 NumSegments = 0; 668 break; 669 670 default: 671 672 /* one 4-byte name */ 673 674 NamesIndex = PrefixLength; 675 NumSegments = 1; 676 break; 677 } 678 } 679 680 /* 681 * Calculate the length of ConvertedName, which equals the length 682 * of the prefix, length of all object names, length of any required 683 * punctuation ('.') between object names, plus the NULL terminator. 684 */ 685 RequiredLength = PrefixLength + (4 * NumSegments) + 686 ((NumSegments > 0) ? (NumSegments - 1) : 0) + 1; 687 688 /* 689 * Check to see if we're still in bounds. If not, there's a problem 690 * with InternalName (invalid format). 691 */ 692 if (RequiredLength > InternalNameLength) 693 { 694 ACPI_ERROR ((AE_INFO, "Invalid internal name")); 695 return_ACPI_STATUS (AE_BAD_PATHNAME); 696 } 697 698 /* Build the ConvertedName */ 699 700 *ConvertedName = ACPI_ALLOCATE_ZEROED (RequiredLength); 701 if (!(*ConvertedName)) 702 { 703 return_ACPI_STATUS (AE_NO_MEMORY); 704 } 705 706 j = 0; 707 708 for (i = 0; i < PrefixLength; i++) 709 { 710 (*ConvertedName)[j++] = InternalName[i]; 711 } 712 713 if (NumSegments > 0) 714 { 715 for (i = 0; i < NumSegments; i++) 716 { 717 if (i > 0) 718 { 719 (*ConvertedName)[j++] = '.'; 720 } 721 722 /* Copy and validate the 4-char name segment */ 723 724 ACPI_MOVE_NAME (&(*ConvertedName)[j], 725 &InternalName[NamesIndex]); 726 AcpiUtRepairName (&(*ConvertedName)[j]); 727 728 j += ACPI_NAME_SIZE; 729 NamesIndex += ACPI_NAME_SIZE; 730 } 731 } 732 733 if (ConvertedNameLength) 734 { 735 *ConvertedNameLength = (UINT32) RequiredLength; 736 } 737 738 return_ACPI_STATUS (AE_OK); 739 } 740 741 742 /******************************************************************************* 743 * 744 * FUNCTION: AcpiNsValidateHandle 745 * 746 * PARAMETERS: Handle - Handle to be validated and typecast to a 747 * namespace node. 748 * 749 * RETURN: A pointer to a namespace node 750 * 751 * DESCRIPTION: Convert a namespace handle to a namespace node. Handles special 752 * cases for the root node. 753 * 754 * NOTE: Real integer handles would allow for more verification 755 * and keep all pointers within this subsystem - however this introduces 756 * more overhead and has not been necessary to this point. Drivers 757 * holding handles are typically notified before a node becomes invalid 758 * due to a table unload. 759 * 760 ******************************************************************************/ 761 762 ACPI_NAMESPACE_NODE * 763 AcpiNsValidateHandle ( 764 ACPI_HANDLE Handle) 765 { 766 767 ACPI_FUNCTION_ENTRY (); 768 769 770 /* Parameter validation */ 771 772 if ((!Handle) || (Handle == ACPI_ROOT_OBJECT)) 773 { 774 return (AcpiGbl_RootNode); 775 } 776 777 /* We can at least attempt to verify the handle */ 778 779 if (ACPI_GET_DESCRIPTOR_TYPE (Handle) != ACPI_DESC_TYPE_NAMED) 780 { 781 return (NULL); 782 } 783 784 return (ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Handle)); 785 } 786 787 788 /******************************************************************************* 789 * 790 * FUNCTION: AcpiNsTerminate 791 * 792 * PARAMETERS: none 793 * 794 * RETURN: none 795 * 796 * DESCRIPTION: free memory allocated for namespace and ACPI table storage. 797 * 798 ******************************************************************************/ 799 800 void 801 AcpiNsTerminate ( 802 void) 803 { 804 ACPI_STATUS Status; 805 ACPI_OPERAND_OBJECT *Prev; 806 ACPI_OPERAND_OBJECT *Next; 807 808 809 ACPI_FUNCTION_TRACE (NsTerminate); 810 811 812 /* Delete any module-level code blocks */ 813 814 Next = AcpiGbl_ModuleCodeList; 815 while (Next) 816 { 817 Prev = Next; 818 Next = Next->Method.Mutex; 819 Prev->Method.Mutex = NULL; /* Clear the Mutex (cheated) field */ 820 AcpiUtRemoveReference (Prev); 821 } 822 823 /* 824 * Free the entire namespace -- all nodes and all objects 825 * attached to the nodes 826 */ 827 AcpiNsDeleteNamespaceSubtree (AcpiGbl_RootNode); 828 829 /* Delete any objects attached to the root node */ 830 831 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 832 if (ACPI_FAILURE (Status)) 833 { 834 return_VOID; 835 } 836 837 AcpiNsDeleteNode (AcpiGbl_RootNode); 838 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 839 840 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Namespace freed\n")); 841 return_VOID; 842 } 843 844 845 /******************************************************************************* 846 * 847 * FUNCTION: AcpiNsOpensScope 848 * 849 * PARAMETERS: Type - A valid namespace type 850 * 851 * RETURN: NEWSCOPE if the passed type "opens a name scope" according 852 * to the ACPI specification, else 0 853 * 854 ******************************************************************************/ 855 856 UINT32 857 AcpiNsOpensScope ( 858 ACPI_OBJECT_TYPE Type) 859 { 860 ACPI_FUNCTION_ENTRY (); 861 862 863 if (Type > ACPI_TYPE_LOCAL_MAX) 864 { 865 /* type code out of range */ 866 867 ACPI_WARNING ((AE_INFO, "Invalid Object Type 0x%X", Type)); 868 return (ACPI_NS_NORMAL); 869 } 870 871 return (((UINT32) AcpiGbl_NsProperties[Type]) & ACPI_NS_NEWSCOPE); 872 } 873 874 875 /******************************************************************************* 876 * 877 * FUNCTION: AcpiNsGetNodeUnlocked 878 * 879 * PARAMETERS: *Pathname - Name to be found, in external (ASL) format. The 880 * \ (backslash) and ^ (carat) prefixes, and the 881 * . (period) to separate segments are supported. 882 * PrefixNode - Root of subtree to be searched, or NS_ALL for the 883 * root of the name space. If Name is fully 884 * qualified (first INT8 is '\'), the passed value 885 * of Scope will not be accessed. 886 * Flags - Used to indicate whether to perform upsearch or 887 * not. 888 * ReturnNode - Where the Node is returned 889 * 890 * DESCRIPTION: Look up a name relative to a given scope and return the 891 * corresponding Node. NOTE: Scope can be null. 892 * 893 * MUTEX: Doesn't locks namespace 894 * 895 ******************************************************************************/ 896 897 ACPI_STATUS 898 AcpiNsGetNodeUnlocked ( 899 ACPI_NAMESPACE_NODE *PrefixNode, 900 const char *Pathname, 901 UINT32 Flags, 902 ACPI_NAMESPACE_NODE **ReturnNode) 903 { 904 ACPI_GENERIC_STATE ScopeInfo; 905 ACPI_STATUS Status; 906 char *InternalPath; 907 908 909 ACPI_FUNCTION_TRACE_PTR (NsGetNodeUnlocked, ACPI_CAST_PTR (char, Pathname)); 910 911 912 /* Simplest case is a null pathname */ 913 914 if (!Pathname) 915 { 916 *ReturnNode = PrefixNode; 917 if (!PrefixNode) 918 { 919 *ReturnNode = AcpiGbl_RootNode; 920 } 921 922 return_ACPI_STATUS (AE_OK); 923 } 924 925 /* Quick check for a reference to the root */ 926 927 if (ACPI_IS_ROOT_PREFIX (Pathname[0]) && (!Pathname[1])) 928 { 929 *ReturnNode = AcpiGbl_RootNode; 930 return_ACPI_STATUS (AE_OK); 931 } 932 933 /* Convert path to internal representation */ 934 935 Status = AcpiNsInternalizeName (Pathname, &InternalPath); 936 if (ACPI_FAILURE (Status)) 937 { 938 return_ACPI_STATUS (Status); 939 } 940 941 /* Setup lookup scope (search starting point) */ 942 943 ScopeInfo.Scope.Node = PrefixNode; 944 945 /* Lookup the name in the namespace */ 946 947 Status = AcpiNsLookup (&ScopeInfo, InternalPath, ACPI_TYPE_ANY, 948 ACPI_IMODE_EXECUTE, (Flags | ACPI_NS_DONT_OPEN_SCOPE), 949 NULL, ReturnNode); 950 if (ACPI_FAILURE (Status)) 951 { 952 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "%s, %s\n", 953 Pathname, AcpiFormatException (Status))); 954 } 955 956 ACPI_FREE (InternalPath); 957 return_ACPI_STATUS (Status); 958 } 959 960 961 /******************************************************************************* 962 * 963 * FUNCTION: AcpiNsGetNode 964 * 965 * PARAMETERS: *Pathname - Name to be found, in external (ASL) format. The 966 * \ (backslash) and ^ (carat) prefixes, and the 967 * . (period) to separate segments are supported. 968 * PrefixNode - Root of subtree to be searched, or NS_ALL for the 969 * root of the name space. If Name is fully 970 * qualified (first INT8 is '\'), the passed value 971 * of Scope will not be accessed. 972 * Flags - Used to indicate whether to perform upsearch or 973 * not. 974 * ReturnNode - Where the Node is returned 975 * 976 * DESCRIPTION: Look up a name relative to a given scope and return the 977 * corresponding Node. NOTE: Scope can be null. 978 * 979 * MUTEX: Locks namespace 980 * 981 ******************************************************************************/ 982 983 ACPI_STATUS 984 AcpiNsGetNode ( 985 ACPI_NAMESPACE_NODE *PrefixNode, 986 const char *Pathname, 987 UINT32 Flags, 988 ACPI_NAMESPACE_NODE **ReturnNode) 989 { 990 ACPI_STATUS Status; 991 992 993 ACPI_FUNCTION_TRACE_PTR (NsGetNode, ACPI_CAST_PTR (char, Pathname)); 994 995 996 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 997 if (ACPI_FAILURE (Status)) 998 { 999 return_ACPI_STATUS (Status); 1000 } 1001 1002 Status = AcpiNsGetNodeUnlocked (PrefixNode, Pathname, 1003 Flags, ReturnNode); 1004 1005 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 1006 return_ACPI_STATUS (Status); 1007 } 1008