1/****************************************************************************** 2 * 3 * Module Name: nsxfname - Public interfaces to the ACPI subsystem 4 * ACPI Namespace oriented interfaces 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 __NSXFNAME_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/acparser.h> 123#include <contrib/dev/acpica/include/amlcode.h> 124 125 126#define _COMPONENT ACPI_NAMESPACE 127 ACPI_MODULE_NAME ("nsxfname") 128 129/* Local prototypes */ 130 131static char * 132AcpiNsCopyDeviceId ( 133 ACPI_DEVICE_ID *Dest, 134 ACPI_DEVICE_ID *Source, 135 char *StringArea); 136 137 138/****************************************************************************** 139 * 140 * FUNCTION: AcpiGetHandle 141 * 142 * PARAMETERS: Parent - Object to search under (search scope). 143 * Pathname - Pointer to an asciiz string containing the 144 * name 145 * RetHandle - Where the return handle is returned 146 * 147 * RETURN: Status 148 * 149 * DESCRIPTION: This routine will search for a caller specified name in the 150 * name space. The caller can restrict the search region by 151 * specifying a non NULL parent. The parent value is itself a 152 * namespace handle. 153 * 154 ******************************************************************************/ 155 156ACPI_STATUS 157AcpiGetHandle ( 158 ACPI_HANDLE Parent, 159 ACPI_STRING Pathname, 160 ACPI_HANDLE *RetHandle) 161{ 162 ACPI_STATUS Status; 163 ACPI_NAMESPACE_NODE *Node = NULL; 164 ACPI_NAMESPACE_NODE *PrefixNode = NULL; 165 166 167 ACPI_FUNCTION_ENTRY (); 168 169 170 /* Parameter Validation */ 171 172 if (!RetHandle || !Pathname) 173 { 174 return (AE_BAD_PARAMETER); 175 } 176 177 /* Convert a parent handle to a prefix node */ 178 179 if (Parent) 180 {
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181 PrefixNode = AcpiNsMapHandleToNode (Parent);
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181 PrefixNode = AcpiNsValidateHandle (Parent); |
182 if (!PrefixNode) 183 { 184 return (AE_BAD_PARAMETER); 185 } 186 } 187 188 /* 189 * Valid cases are: 190 * 1) Fully qualified pathname 191 * 2) Parent + Relative pathname 192 * 193 * Error for <null Parent + relative path> 194 */ 195 if (AcpiNsValidRootPrefix (Pathname[0])) 196 { 197 /* Pathname is fully qualified (starts with '\') */ 198 199 /* Special case for root-only, since we can't search for it */ 200 201 if (!ACPI_STRCMP (Pathname, ACPI_NS_ROOT_PATH)) 202 {
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203 *RetHandle = AcpiNsConvertEntryToHandle (AcpiGbl_RootNode);
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203 *RetHandle = ACPI_CAST_PTR (ACPI_HANDLE, AcpiGbl_RootNode); |
204 return (AE_OK); 205 } 206 } 207 else if (!PrefixNode) 208 { 209 /* Relative path with null prefix is disallowed */ 210 211 return (AE_BAD_PARAMETER); 212 } 213 214 /* Find the Node and convert to a handle */ 215 216 Status = AcpiNsGetNode (PrefixNode, Pathname, ACPI_NS_NO_UPSEARCH, &Node); 217 if (ACPI_SUCCESS (Status)) 218 {
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219 *RetHandle = AcpiNsConvertEntryToHandle (Node);
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219 *RetHandle = ACPI_CAST_PTR (ACPI_HANDLE, Node); |
220 } 221 222 return (Status); 223} 224 225ACPI_EXPORT_SYMBOL (AcpiGetHandle) 226 227 228/****************************************************************************** 229 * 230 * FUNCTION: AcpiGetName 231 * 232 * PARAMETERS: Handle - Handle to be converted to a pathname 233 * NameType - Full pathname or single segment 234 * Buffer - Buffer for returned path 235 * 236 * RETURN: Pointer to a string containing the fully qualified Name. 237 * 238 * DESCRIPTION: This routine returns the fully qualified name associated with 239 * the Handle parameter. This and the AcpiPathnameToHandle are 240 * complementary functions. 241 * 242 ******************************************************************************/ 243 244ACPI_STATUS 245AcpiGetName ( 246 ACPI_HANDLE Handle, 247 UINT32 NameType, 248 ACPI_BUFFER *Buffer) 249{ 250 ACPI_STATUS Status; 251 ACPI_NAMESPACE_NODE *Node; 252 253 254 /* Parameter validation */ 255 256 if (NameType > ACPI_NAME_TYPE_MAX) 257 { 258 return (AE_BAD_PARAMETER); 259 } 260 261 Status = AcpiUtValidateBuffer (Buffer); 262 if (ACPI_FAILURE (Status)) 263 { 264 return (Status); 265 } 266 267 if (NameType == ACPI_FULL_PATHNAME) 268 { 269 /* Get the full pathname (From the namespace root) */ 270 271 Status = AcpiNsHandleToPathname (Handle, Buffer); 272 return (Status); 273 } 274 275 /* 276 * Wants the single segment ACPI name. 277 * Validate handle and convert to a namespace Node 278 */ 279 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 280 if (ACPI_FAILURE (Status)) 281 { 282 return (Status); 283 } 284
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285 Node = AcpiNsMapHandleToNode (Handle);
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285 Node = AcpiNsValidateHandle (Handle); |
286 if (!Node) 287 { 288 Status = AE_BAD_PARAMETER; 289 goto UnlockAndExit; 290 } 291 292 /* Validate/Allocate/Clear caller buffer */ 293 294 Status = AcpiUtInitializeBuffer (Buffer, ACPI_PATH_SEGMENT_LENGTH); 295 if (ACPI_FAILURE (Status)) 296 { 297 goto UnlockAndExit; 298 } 299 300 /* Just copy the ACPI name from the Node and zero terminate it */ 301 302 ACPI_STRNCPY (Buffer->Pointer, AcpiUtGetNodeName (Node), 303 ACPI_NAME_SIZE); 304 ((char *) Buffer->Pointer) [ACPI_NAME_SIZE] = 0; 305 Status = AE_OK; 306 307 308UnlockAndExit: 309 310 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 311 return (Status); 312} 313 314ACPI_EXPORT_SYMBOL (AcpiGetName) 315 316 317/****************************************************************************** 318 * 319 * FUNCTION: AcpiNsCopyDeviceId 320 * 321 * PARAMETERS: Dest - Pointer to the destination DEVICE_ID 322 * Source - Pointer to the source DEVICE_ID 323 * StringArea - Pointer to where to copy the dest string 324 * 325 * RETURN: Pointer to the next string area 326 * 327 * DESCRIPTION: Copy a single DEVICE_ID, including the string data. 328 * 329 ******************************************************************************/ 330 331static char * 332AcpiNsCopyDeviceId ( 333 ACPI_DEVICE_ID *Dest, 334 ACPI_DEVICE_ID *Source, 335 char *StringArea) 336{ 337 /* Create the destination DEVICE_ID */ 338 339 Dest->String = StringArea; 340 Dest->Length = Source->Length; 341 342 /* Copy actual string and return a pointer to the next string area */ 343 344 ACPI_MEMCPY (StringArea, Source->String, Source->Length); 345 return (StringArea + Source->Length); 346} 347 348 349/****************************************************************************** 350 * 351 * FUNCTION: AcpiGetObjectInfo 352 * 353 * PARAMETERS: Handle - Object Handle 354 * ReturnBuffer - Where the info is returned 355 * 356 * RETURN: Status 357 * 358 * DESCRIPTION: Returns information about an object as gleaned from the 359 * namespace node and possibly by running several standard 360 * control methods (Such as in the case of a device.) 361 * 362 * For Device and Processor objects, run the Device _HID, _UID, _CID, _STA, 363 * _ADR, _SxW, and _SxD methods. 364 * 365 * Note: Allocates the return buffer, must be freed by the caller. 366 * 367 ******************************************************************************/ 368 369ACPI_STATUS 370AcpiGetObjectInfo ( 371 ACPI_HANDLE Handle, 372 ACPI_DEVICE_INFO **ReturnBuffer) 373{ 374 ACPI_NAMESPACE_NODE *Node; 375 ACPI_DEVICE_INFO *Info; 376 ACPI_DEVICE_ID_LIST *CidList = NULL; 377 ACPI_DEVICE_ID *Hid = NULL; 378 ACPI_DEVICE_ID *Uid = NULL; 379 char *NextIdString; 380 ACPI_OBJECT_TYPE Type; 381 ACPI_NAME Name; 382 UINT8 ParamCount= 0; 383 UINT8 Valid = 0; 384 UINT32 InfoSize; 385 UINT32 i; 386 ACPI_STATUS Status; 387 388 389 /* Parameter validation */ 390 391 if (!Handle || !ReturnBuffer) 392 { 393 return (AE_BAD_PARAMETER); 394 } 395 396 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 397 if (ACPI_FAILURE (Status)) 398 { 399 goto Cleanup; 400 } 401
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402 Node = AcpiNsMapHandleToNode (Handle);
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402 Node = AcpiNsValidateHandle (Handle); |
403 if (!Node) 404 { 405 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 406 return (AE_BAD_PARAMETER); 407 } 408 409 /* Get the namespace node data while the namespace is locked */ 410 411 InfoSize = sizeof (ACPI_DEVICE_INFO); 412 Type = Node->Type; 413 Name = Node->Name.Integer; 414 415 if (Node->Type == ACPI_TYPE_METHOD) 416 { 417 ParamCount = Node->Object->Method.ParamCount; 418 } 419 420 Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 421 if (ACPI_FAILURE (Status)) 422 { 423 return (Status); 424 } 425 426 if ((Type == ACPI_TYPE_DEVICE) || 427 (Type == ACPI_TYPE_PROCESSOR)) 428 { 429 /* 430 * Get extra info for ACPI Device/Processor objects only: 431 * Run the Device _HID, _UID, and _CID methods. 432 * 433 * Note: none of these methods are required, so they may or may 434 * not be present for this device. The Info->Valid bitfield is used 435 * to indicate which methods were found and run successfully. 436 */ 437 438 /* Execute the Device._HID method */ 439 440 Status = AcpiUtExecute_HID (Node, &Hid); 441 if (ACPI_SUCCESS (Status)) 442 { 443 InfoSize += Hid->Length; 444 Valid |= ACPI_VALID_HID; 445 } 446 447 /* Execute the Device._UID method */ 448 449 Status = AcpiUtExecute_UID (Node, &Uid); 450 if (ACPI_SUCCESS (Status)) 451 { 452 InfoSize += Uid->Length; 453 Valid |= ACPI_VALID_UID; 454 } 455 456 /* Execute the Device._CID method */ 457 458 Status = AcpiUtExecute_CID (Node, &CidList); 459 if (ACPI_SUCCESS (Status)) 460 { 461 /* Add size of CID strings and CID pointer array */ 462 463 InfoSize += (CidList->ListSize - sizeof (ACPI_DEVICE_ID_LIST)); 464 Valid |= ACPI_VALID_CID; 465 } 466 } 467 468 /* 469 * Now that we have the variable-length data, we can allocate the 470 * return buffer 471 */ 472 Info = ACPI_ALLOCATE_ZEROED (InfoSize); 473 if (!Info) 474 { 475 Status = AE_NO_MEMORY; 476 goto Cleanup; 477 } 478 479 /* Get the fixed-length data */ 480 481 if ((Type == ACPI_TYPE_DEVICE) || 482 (Type == ACPI_TYPE_PROCESSOR)) 483 { 484 /* 485 * Get extra info for ACPI Device/Processor objects only: 486 * Run the _STA, _ADR and, SxW, and _SxD methods. 487 * 488 * Note: none of these methods are required, so they may or may 489 * not be present for this device. The Info->Valid bitfield is used 490 * to indicate which methods were found and run successfully. 491 */ 492 493 /* Execute the Device._STA method */ 494 495 Status = AcpiUtExecute_STA (Node, &Info->CurrentStatus); 496 if (ACPI_SUCCESS (Status)) 497 { 498 Valid |= ACPI_VALID_STA; 499 } 500 501 /* Execute the Device._ADR method */ 502 503 Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR, Node, 504 &Info->Address); 505 if (ACPI_SUCCESS (Status)) 506 { 507 Valid |= ACPI_VALID_ADR; 508 } 509 510 /* Execute the Device._SxW methods */ 511 512 Status = AcpiUtExecutePowerMethods (Node, 513 AcpiGbl_LowestDstateNames, ACPI_NUM_SxW_METHODS, 514 Info->LowestDstates); 515 if (ACPI_SUCCESS (Status)) 516 { 517 Valid |= ACPI_VALID_SXWS; 518 } 519 520 /* Execute the Device._SxD methods */ 521 522 Status = AcpiUtExecutePowerMethods (Node, 523 AcpiGbl_HighestDstateNames, ACPI_NUM_SxD_METHODS, 524 Info->HighestDstates); 525 if (ACPI_SUCCESS (Status)) 526 { 527 Valid |= ACPI_VALID_SXDS; 528 } 529 } 530 531 /* 532 * Create a pointer to the string area of the return buffer. 533 * Point to the end of the base ACPI_DEVICE_INFO structure. 534 */ 535 NextIdString = ACPI_CAST_PTR (char, Info->CompatibleIdList.Ids); 536 if (CidList) 537 { 538 /* Point past the CID DEVICE_ID array */ 539 540 NextIdString += ((ACPI_SIZE) CidList->Count * sizeof (ACPI_DEVICE_ID)); 541 } 542 543 /* 544 * Copy the HID, UID, and CIDs to the return buffer. The variable-length 545 * strings are copied to the reserved area at the end of the buffer. 546 * 547 * For HID and CID, check if the ID is a PCI Root Bridge. 548 */ 549 if (Hid) 550 { 551 NextIdString = AcpiNsCopyDeviceId (&Info->HardwareId, 552 Hid, NextIdString); 553 554 if (AcpiUtIsPciRootBridge (Hid->String)) 555 { 556 Info->Flags |= ACPI_PCI_ROOT_BRIDGE; 557 } 558 } 559 560 if (Uid) 561 { 562 NextIdString = AcpiNsCopyDeviceId (&Info->UniqueId, 563 Uid, NextIdString); 564 } 565 566 if (CidList) 567 { 568 Info->CompatibleIdList.Count = CidList->Count; 569 Info->CompatibleIdList.ListSize = CidList->ListSize; 570 571 /* Copy each CID */ 572 573 for (i = 0; i < CidList->Count; i++) 574 { 575 NextIdString = AcpiNsCopyDeviceId (&Info->CompatibleIdList.Ids[i], 576 &CidList->Ids[i], NextIdString); 577 578 if (AcpiUtIsPciRootBridge (CidList->Ids[i].String)) 579 { 580 Info->Flags |= ACPI_PCI_ROOT_BRIDGE; 581 } 582 } 583 } 584 585 /* Copy the fixed-length data */ 586 587 Info->InfoSize = InfoSize; 588 Info->Type = Type; 589 Info->Name = Name; 590 Info->ParamCount = ParamCount; 591 Info->Valid = Valid; 592 593 *ReturnBuffer = Info; 594 Status = AE_OK; 595 596 597Cleanup: 598 if (Hid) 599 { 600 ACPI_FREE (Hid); 601 } 602 if (Uid) 603 { 604 ACPI_FREE (Uid); 605 } 606 if (CidList) 607 { 608 ACPI_FREE (CidList); 609 } 610 return (Status); 611} 612 613ACPI_EXPORT_SYMBOL (AcpiGetObjectInfo) 614 615 616/****************************************************************************** 617 * 618 * FUNCTION: AcpiInstallMethod 619 * 620 * PARAMETERS: Buffer - An ACPI table containing one control method 621 * 622 * RETURN: Status 623 * 624 * DESCRIPTION: Install a control method into the namespace. If the method 625 * name already exists in the namespace, it is overwritten. The 626 * input buffer must contain a valid DSDT or SSDT containing a 627 * single control method. 628 * 629 ******************************************************************************/ 630 631ACPI_STATUS 632AcpiInstallMethod ( 633 UINT8 *Buffer) 634{ 635 ACPI_TABLE_HEADER *Table = ACPI_CAST_PTR (ACPI_TABLE_HEADER, Buffer); 636 UINT8 *AmlBuffer; 637 UINT8 *AmlStart; 638 char *Path; 639 ACPI_NAMESPACE_NODE *Node; 640 ACPI_OPERAND_OBJECT *MethodObj; 641 ACPI_PARSE_STATE ParserState; 642 UINT32 AmlLength; 643 UINT16 Opcode; 644 UINT8 MethodFlags; 645 ACPI_STATUS Status; 646 647 648 /* Parameter validation */ 649 650 if (!Buffer) 651 { 652 return (AE_BAD_PARAMETER); 653 } 654 655 /* Table must be a DSDT or SSDT */ 656 657 if (!ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_DSDT) && 658 !ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_SSDT)) 659 { 660 return (AE_BAD_HEADER); 661 } 662 663 /* First AML opcode in the table must be a control method */ 664 665 ParserState.Aml = Buffer + sizeof (ACPI_TABLE_HEADER); 666 Opcode = AcpiPsPeekOpcode (&ParserState); 667 if (Opcode != AML_METHOD_OP) 668 { 669 return (AE_BAD_PARAMETER); 670 } 671 672 /* Extract method information from the raw AML */ 673 674 ParserState.Aml += AcpiPsGetOpcodeSize (Opcode); 675 ParserState.PkgEnd = AcpiPsGetNextPackageEnd (&ParserState); 676 Path = AcpiPsGetNextNamestring (&ParserState); 677 MethodFlags = *ParserState.Aml++; 678 AmlStart = ParserState.Aml; 679 AmlLength = ACPI_PTR_DIFF (ParserState.PkgEnd, AmlStart); 680 681 /* 682 * Allocate resources up-front. We don't want to have to delete a new 683 * node from the namespace if we cannot allocate memory. 684 */ 685 AmlBuffer = ACPI_ALLOCATE (AmlLength); 686 if (!AmlBuffer) 687 { 688 return (AE_NO_MEMORY); 689 } 690 691 MethodObj = AcpiUtCreateInternalObject (ACPI_TYPE_METHOD); 692 if (!MethodObj) 693 { 694 ACPI_FREE (AmlBuffer); 695 return (AE_NO_MEMORY); 696 } 697 698 /* Lock namespace for AcpiNsLookup, we may be creating a new node */ 699 700 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 701 if (ACPI_FAILURE (Status)) 702 { 703 goto ErrorExit; 704 } 705 706 /* The lookup either returns an existing node or creates a new one */ 707 708 Status = AcpiNsLookup (NULL, Path, ACPI_TYPE_METHOD, ACPI_IMODE_LOAD_PASS1, 709 ACPI_NS_DONT_OPEN_SCOPE | ACPI_NS_ERROR_IF_FOUND, NULL, &Node); 710 711 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 712 713 if (ACPI_FAILURE (Status)) /* NsLookup */ 714 { 715 if (Status != AE_ALREADY_EXISTS) 716 { 717 goto ErrorExit; 718 } 719 720 /* Node existed previously, make sure it is a method node */ 721 722 if (Node->Type != ACPI_TYPE_METHOD) 723 { 724 Status = AE_TYPE; 725 goto ErrorExit; 726 } 727 } 728 729 /* Copy the method AML to the local buffer */ 730 731 ACPI_MEMCPY (AmlBuffer, AmlStart, AmlLength); 732 733 /* Initialize the method object with the new method's information */ 734 735 MethodObj->Method.AmlStart = AmlBuffer; 736 MethodObj->Method.AmlLength = AmlLength; 737 738 MethodObj->Method.ParamCount = (UINT8) 739 (MethodFlags & AML_METHOD_ARG_COUNT); 740 741 MethodObj->Method.MethodFlags = (UINT8) 742 (MethodFlags & ~AML_METHOD_ARG_COUNT); 743 744 if (MethodFlags & AML_METHOD_SERIALIZED) 745 { 746 MethodObj->Method.SyncLevel = (UINT8) 747 ((MethodFlags & AML_METHOD_SYNC_LEVEL) >> 4); 748 } 749 750 /* 751 * Now that it is complete, we can attach the new method object to 752 * the method Node (detaches/deletes any existing object) 753 */ 754 Status = AcpiNsAttachObject (Node, MethodObj, 755 ACPI_TYPE_METHOD); 756 757 /* 758 * Flag indicates AML buffer is dynamic, must be deleted later. 759 * Must be set only after attach above. 760 */ 761 Node->Flags |= ANOBJ_ALLOCATED_BUFFER; 762 763 /* Remove local reference to the method object */ 764 765 AcpiUtRemoveReference (MethodObj); 766 return (Status); 767 768 769ErrorExit: 770 771 ACPI_FREE (AmlBuffer); 772 ACPI_FREE (MethodObj); 773 return (Status); 774} 775 776ACPI_EXPORT_SYMBOL (AcpiInstallMethod)
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