nsxfname.c revision 193341
167754Smsmith/****************************************************************************** 267754Smsmith * 367754Smsmith * Module Name: nsxfname - Public interfaces to the ACPI subsystem 467754Smsmith * ACPI Namespace oriented interfaces 567754Smsmith * 667754Smsmith *****************************************************************************/ 767754Smsmith 867754Smsmith/****************************************************************************** 967754Smsmith * 1067754Smsmith * 1. Copyright Notice 1167754Smsmith * 12193267Sjkim * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp. 1370243Smsmith * All rights reserved. 1467754Smsmith * 1567754Smsmith * 2. License 1667754Smsmith * 1767754Smsmith * 2.1. This is your license from Intel Corp. under its intellectual property 1867754Smsmith * rights. You may have additional license terms from the party that provided 1967754Smsmith * you this software, covering your right to use that party's intellectual 2067754Smsmith * property rights. 2167754Smsmith * 2267754Smsmith * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 2367754Smsmith * copy of the source code appearing in this file ("Covered Code") an 2467754Smsmith * irrevocable, perpetual, worldwide license under Intel's copyrights in the 2567754Smsmith * base code distributed originally by Intel ("Original Intel Code") to copy, 2667754Smsmith * make derivatives, distribute, use and display any portion of the Covered 2767754Smsmith * Code in any form, with the right to sublicense such rights; and 2867754Smsmith * 2967754Smsmith * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 3067754Smsmith * license (with the right to sublicense), under only those claims of Intel 3167754Smsmith * patents that are infringed by the Original Intel Code, to make, use, sell, 3267754Smsmith * offer to sell, and import the Covered Code and derivative works thereof 3367754Smsmith * solely to the minimum extent necessary to exercise the above copyright 3467754Smsmith * license, and in no event shall the patent license extend to any additions 3567754Smsmith * to or modifications of the Original Intel Code. No other license or right 3667754Smsmith * is granted directly or by implication, estoppel or otherwise; 3767754Smsmith * 3867754Smsmith * The above copyright and patent license is granted only if the following 3967754Smsmith * conditions are met: 4067754Smsmith * 4167754Smsmith * 3. Conditions 4267754Smsmith * 4367754Smsmith * 3.1. Redistribution of Source with Rights to Further Distribute Source. 4467754Smsmith * Redistribution of source code of any substantial portion of the Covered 4567754Smsmith * Code or modification with rights to further distribute source must include 4667754Smsmith * the above Copyright Notice, the above License, this list of Conditions, 4767754Smsmith * and the following Disclaimer and Export Compliance provision. In addition, 4867754Smsmith * Licensee must cause all Covered Code to which Licensee contributes to 4967754Smsmith * contain a file documenting the changes Licensee made to create that Covered 5067754Smsmith * Code and the date of any change. Licensee must include in that file the 5167754Smsmith * documentation of any changes made by any predecessor Licensee. Licensee 5267754Smsmith * must include a prominent statement that the modification is derived, 5367754Smsmith * directly or indirectly, from Original Intel Code. 5467754Smsmith * 5567754Smsmith * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 5667754Smsmith * Redistribution of source code of any substantial portion of the Covered 5767754Smsmith * Code or modification without rights to further distribute source must 5867754Smsmith * include the following Disclaimer and Export Compliance provision in the 5967754Smsmith * documentation and/or other materials provided with distribution. In 6067754Smsmith * addition, Licensee may not authorize further sublicense of source of any 6167754Smsmith * portion of the Covered Code, and must include terms to the effect that the 6267754Smsmith * license from Licensee to its licensee is limited to the intellectual 6367754Smsmith * property embodied in the software Licensee provides to its licensee, and 6467754Smsmith * not to intellectual property embodied in modifications its licensee may 6567754Smsmith * make. 6667754Smsmith * 6767754Smsmith * 3.3. Redistribution of Executable. Redistribution in executable form of any 6867754Smsmith * substantial portion of the Covered Code or modification must reproduce the 6967754Smsmith * above Copyright Notice, and the following Disclaimer and Export Compliance 7067754Smsmith * provision in the documentation and/or other materials provided with the 7167754Smsmith * distribution. 7267754Smsmith * 7367754Smsmith * 3.4. Intel retains all right, title, and interest in and to the Original 7467754Smsmith * Intel Code. 7567754Smsmith * 7667754Smsmith * 3.5. Neither the name Intel nor any other trademark owned or controlled by 7767754Smsmith * Intel shall be used in advertising or otherwise to promote the sale, use or 7867754Smsmith * other dealings in products derived from or relating to the Covered Code 7967754Smsmith * without prior written authorization from Intel. 8067754Smsmith * 8167754Smsmith * 4. Disclaimer and Export Compliance 8267754Smsmith * 8367754Smsmith * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 8467754Smsmith * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 8567754Smsmith * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 8667754Smsmith * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 8767754Smsmith * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 8867754Smsmith * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 8967754Smsmith * PARTICULAR PURPOSE. 9067754Smsmith * 9167754Smsmith * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 9267754Smsmith * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 9367754Smsmith * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 9467754Smsmith * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 9567754Smsmith * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 9667754Smsmith * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 9767754Smsmith * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 9867754Smsmith * LIMITED REMEDY. 9967754Smsmith * 10067754Smsmith * 4.3. Licensee shall not export, either directly or indirectly, any of this 10167754Smsmith * software or system incorporating such software without first obtaining any 10267754Smsmith * required license or other approval from the U. S. Department of Commerce or 10367754Smsmith * any other agency or department of the United States Government. In the 10467754Smsmith * event Licensee exports any such software from the United States or 10567754Smsmith * re-exports any such software from a foreign destination, Licensee shall 10667754Smsmith * ensure that the distribution and export/re-export of the software is in 10767754Smsmith * compliance with all laws, regulations, orders, or other restrictions of the 10867754Smsmith * U.S. Export Administration Regulations. Licensee agrees that neither it nor 10967754Smsmith * any of its subsidiaries will export/re-export any technical data, process, 11067754Smsmith * software, or service, directly or indirectly, to any country for which the 11167754Smsmith * United States government or any agency thereof requires an export license, 11267754Smsmith * other governmental approval, or letter of assurance, without first obtaining 11367754Smsmith * such license, approval or letter. 11467754Smsmith * 11567754Smsmith *****************************************************************************/ 11667754Smsmith 11767754Smsmith#define __NSXFNAME_C__ 11867754Smsmith 119193341Sjkim#include <contrib/dev/acpica/include/acpi.h> 120193341Sjkim#include <contrib/dev/acpica/include/accommon.h> 121193341Sjkim#include <contrib/dev/acpica/include/acnamesp.h> 122193341Sjkim#include <contrib/dev/acpica/include/acparser.h> 123193341Sjkim#include <contrib/dev/acpica/include/amlcode.h> 12467754Smsmith 12567754Smsmith 12677424Smsmith#define _COMPONENT ACPI_NAMESPACE 12791116Smsmith ACPI_MODULE_NAME ("nsxfname") 12867754Smsmith 12967754Smsmith 130117521Snjl/****************************************************************************** 13167754Smsmith * 13267754Smsmith * FUNCTION: AcpiGetHandle 13367754Smsmith * 13467754Smsmith * PARAMETERS: Parent - Object to search under (search scope). 135151937Sjkim * Pathname - Pointer to an asciiz string containing the 136151937Sjkim * name 137151937Sjkim * RetHandle - Where the return handle is returned 13867754Smsmith * 13967754Smsmith * RETURN: Status 14067754Smsmith * 14167754Smsmith * DESCRIPTION: This routine will search for a caller specified name in the 14267754Smsmith * name space. The caller can restrict the search region by 14367754Smsmith * specifying a non NULL parent. The parent value is itself a 14467754Smsmith * namespace handle. 14567754Smsmith * 14667754Smsmith ******************************************************************************/ 14767754Smsmith 14867754SmsmithACPI_STATUS 14967754SmsmithAcpiGetHandle ( 15067754Smsmith ACPI_HANDLE Parent, 15167754Smsmith ACPI_STRING Pathname, 15267754Smsmith ACPI_HANDLE *RetHandle) 15367754Smsmith{ 15467754Smsmith ACPI_STATUS Status; 15569450Smsmith ACPI_NAMESPACE_NODE *Node = NULL; 15667754Smsmith ACPI_NAMESPACE_NODE *PrefixNode = NULL; 15767754Smsmith 15867754Smsmith 15991116Smsmith ACPI_FUNCTION_ENTRY (); 16083174Smsmith 16183174Smsmith 16277424Smsmith /* Parameter Validation */ 16377424Smsmith 16467754Smsmith if (!RetHandle || !Pathname) 16567754Smsmith { 16667754Smsmith return (AE_BAD_PARAMETER); 16767754Smsmith } 16867754Smsmith 16969746Smsmith /* Convert a parent handle to a prefix node */ 17069746Smsmith 17167754Smsmith if (Parent) 17267754Smsmith { 17385756Smsmith PrefixNode = AcpiNsMapHandleToNode (Parent); 17469450Smsmith if (!PrefixNode) 17567754Smsmith { 17667754Smsmith return (AE_BAD_PARAMETER); 17767754Smsmith } 178167802Sjkim } 17967754Smsmith 180167802Sjkim /* 181167802Sjkim * Valid cases are: 182167802Sjkim * 1) Fully qualified pathname 183167802Sjkim * 2) Parent + Relative pathname 184167802Sjkim * 185167802Sjkim * Error for <null Parent + relative path> 186167802Sjkim */ 187167802Sjkim if (AcpiNsValidRootPrefix (Pathname[0])) 188167802Sjkim { 189167802Sjkim /* Pathname is fully qualified (starts with '\') */ 190167802Sjkim 191167802Sjkim /* Special case for root-only, since we can't search for it */ 192167802Sjkim 193167802Sjkim if (!ACPI_STRCMP (Pathname, ACPI_NS_ROOT_PATH)) 19491116Smsmith { 195167802Sjkim *RetHandle = AcpiNsConvertEntryToHandle (AcpiGbl_RootNode); 196167802Sjkim return (AE_OK); 19791116Smsmith } 19867754Smsmith } 199167802Sjkim else if (!PrefixNode) 200167802Sjkim { 201167802Sjkim /* Relative path with null prefix is disallowed */ 20267754Smsmith 203167802Sjkim return (AE_BAD_PARAMETER); 20467754Smsmith } 20567754Smsmith 206167802Sjkim /* Find the Node and convert to a handle */ 20767754Smsmith 208167802Sjkim Status = AcpiNsGetNode (PrefixNode, Pathname, ACPI_NS_NO_UPSEARCH, &Node); 20969746Smsmith if (ACPI_SUCCESS (Status)) 21067754Smsmith { 21167754Smsmith *RetHandle = AcpiNsConvertEntryToHandle (Node); 21267754Smsmith } 21367754Smsmith 21467754Smsmith return (Status); 21567754Smsmith} 21667754Smsmith 217167802SjkimACPI_EXPORT_SYMBOL (AcpiGetHandle) 21867754Smsmith 219167802Sjkim 220117521Snjl/****************************************************************************** 22167754Smsmith * 22283174Smsmith * FUNCTION: AcpiGetName 22367754Smsmith * 22467754Smsmith * PARAMETERS: Handle - Handle to be converted to a pathname 22567754Smsmith * NameType - Full pathname or single segment 22691116Smsmith * Buffer - Buffer for returned path 22767754Smsmith * 22867754Smsmith * RETURN: Pointer to a string containing the fully qualified Name. 22967754Smsmith * 23067754Smsmith * DESCRIPTION: This routine returns the fully qualified name associated with 23167754Smsmith * the Handle parameter. This and the AcpiPathnameToHandle are 23267754Smsmith * complementary functions. 23367754Smsmith * 23467754Smsmith ******************************************************************************/ 23567754Smsmith 23667754SmsmithACPI_STATUS 23767754SmsmithAcpiGetName ( 23867754Smsmith ACPI_HANDLE Handle, 23967754Smsmith UINT32 NameType, 24091116Smsmith ACPI_BUFFER *Buffer) 24167754Smsmith{ 24267754Smsmith ACPI_STATUS Status; 24367754Smsmith ACPI_NAMESPACE_NODE *Node; 24467754Smsmith 24567754Smsmith 24691116Smsmith /* Parameter validation */ 24767754Smsmith 24891116Smsmith if (NameType > ACPI_NAME_TYPE_MAX) 24967754Smsmith { 25067754Smsmith return (AE_BAD_PARAMETER); 25167754Smsmith } 25267754Smsmith 25391116Smsmith Status = AcpiUtValidateBuffer (Buffer); 25491116Smsmith if (ACPI_FAILURE (Status)) 25567754Smsmith { 25691116Smsmith return (Status); 25767754Smsmith } 25867754Smsmith 25967754Smsmith if (NameType == ACPI_FULL_PATHNAME) 26067754Smsmith { 26167754Smsmith /* Get the full pathname (From the namespace root) */ 26267754Smsmith 26391116Smsmith Status = AcpiNsHandleToPathname (Handle, Buffer); 26467754Smsmith return (Status); 26567754Smsmith } 26667754Smsmith 26767754Smsmith /* 26867754Smsmith * Wants the single segment ACPI name. 26991116Smsmith * Validate handle and convert to a namespace Node 27067754Smsmith */ 27191116Smsmith Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 27291116Smsmith if (ACPI_FAILURE (Status)) 27391116Smsmith { 27491116Smsmith return (Status); 27591116Smsmith } 27691116Smsmith 27785756Smsmith Node = AcpiNsMapHandleToNode (Handle); 27867754Smsmith if (!Node) 27967754Smsmith { 28067754Smsmith Status = AE_BAD_PARAMETER; 28167754Smsmith goto UnlockAndExit; 28267754Smsmith } 28367754Smsmith 28491116Smsmith /* Validate/Allocate/Clear caller buffer */ 28567754Smsmith 286114237Snjl Status = AcpiUtInitializeBuffer (Buffer, ACPI_PATH_SEGMENT_LENGTH); 28791116Smsmith if (ACPI_FAILURE (Status)) 28867754Smsmith { 28967754Smsmith goto UnlockAndExit; 29067754Smsmith } 29167754Smsmith 29267754Smsmith /* Just copy the ACPI name from the Node and zero terminate it */ 29367754Smsmith 294123315Snjl ACPI_STRNCPY (Buffer->Pointer, AcpiUtGetNodeName (Node), 29567754Smsmith ACPI_NAME_SIZE); 296114237Snjl ((char *) Buffer->Pointer) [ACPI_NAME_SIZE] = 0; 29767754Smsmith Status = AE_OK; 29867754Smsmith 29967754Smsmith 30067754SmsmithUnlockAndExit: 30167754Smsmith 30291116Smsmith (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 30367754Smsmith return (Status); 30467754Smsmith} 30567754Smsmith 306167802SjkimACPI_EXPORT_SYMBOL (AcpiGetName) 30767754Smsmith 308167802Sjkim 309117521Snjl/****************************************************************************** 31067754Smsmith * 31167754Smsmith * FUNCTION: AcpiGetObjectInfo 31267754Smsmith * 31367754Smsmith * PARAMETERS: Handle - Object Handle 314151937Sjkim * Buffer - Where the info is returned 31567754Smsmith * 31667754Smsmith * RETURN: Status 31767754Smsmith * 31867754Smsmith * DESCRIPTION: Returns information about an object as gleaned from the 31967754Smsmith * namespace node and possibly by running several standard 32067754Smsmith * control methods (Such as in the case of a device.) 32167754Smsmith * 32267754Smsmith ******************************************************************************/ 32367754Smsmith 32467754SmsmithACPI_STATUS 32567754SmsmithAcpiGetObjectInfo ( 32667754Smsmith ACPI_HANDLE Handle, 327117521Snjl ACPI_BUFFER *Buffer) 32867754Smsmith{ 32967754Smsmith ACPI_STATUS Status; 33067754Smsmith ACPI_NAMESPACE_NODE *Node; 331151937Sjkim ACPI_DEVICE_INFO *Info; 332117521Snjl ACPI_DEVICE_INFO *ReturnInfo; 333117521Snjl ACPI_COMPATIBLE_ID_LIST *CidList = NULL; 334117521Snjl ACPI_SIZE Size; 33567754Smsmith 33667754Smsmith 33767754Smsmith /* Parameter validation */ 33867754Smsmith 339117521Snjl if (!Handle || !Buffer) 34067754Smsmith { 34167754Smsmith return (AE_BAD_PARAMETER); 34267754Smsmith } 34367754Smsmith 344117521Snjl Status = AcpiUtValidateBuffer (Buffer); 345117521Snjl if (ACPI_FAILURE (Status)) 346117521Snjl { 347117521Snjl return (Status); 348117521Snjl } 349117521Snjl 350167802Sjkim Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_DEVICE_INFO)); 351151937Sjkim if (!Info) 352151937Sjkim { 353151937Sjkim return (AE_NO_MEMORY); 354151937Sjkim } 355151937Sjkim 35691116Smsmith Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 35791116Smsmith if (ACPI_FAILURE (Status)) 35891116Smsmith { 359151937Sjkim goto Cleanup; 36091116Smsmith } 36167754Smsmith 36285756Smsmith Node = AcpiNsMapHandleToNode (Handle); 36367754Smsmith if (!Node) 36467754Smsmith { 36591116Smsmith (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 366193267Sjkim Status = AE_BAD_PARAMETER; 367151937Sjkim goto Cleanup; 36867754Smsmith } 36967754Smsmith 370117521Snjl /* Init return structure */ 37167754Smsmith 372117521Snjl Size = sizeof (ACPI_DEVICE_INFO); 373117521Snjl 374151937Sjkim Info->Type = Node->Type; 375151937Sjkim Info->Name = Node->Name.Integer; 376151937Sjkim Info->Valid = 0; 377117521Snjl 378193267Sjkim if (Node->Type == ACPI_TYPE_METHOD) 379193267Sjkim { 380193267Sjkim Info->ParamCount = Node->Object->Method.ParamCount; 381193267Sjkim } 382193267Sjkim 38391116Smsmith Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 38491116Smsmith if (ACPI_FAILURE (Status)) 38591116Smsmith { 386151937Sjkim goto Cleanup; 38791116Smsmith } 38867754Smsmith 389117521Snjl /* If not a device, we are all done */ 390117521Snjl 391151937Sjkim if (Info->Type == ACPI_TYPE_DEVICE) 39267754Smsmith { 393117521Snjl /* 394117521Snjl * Get extra info for ACPI Devices objects only: 395129684Snjl * Run the Device _HID, _UID, _CID, _STA, _ADR and _SxD methods. 396123315Snjl * 397117521Snjl * Note: none of these methods are required, so they may or may 398151937Sjkim * not be present for this device. The Info->Valid bitfield is used 399117521Snjl * to indicate which methods were found and ran successfully. 400117521Snjl */ 40167754Smsmith 402117521Snjl /* Execute the Device._HID method */ 40367754Smsmith 404151937Sjkim Status = AcpiUtExecute_HID (Node, &Info->HardwareId); 405117521Snjl if (ACPI_SUCCESS (Status)) 406117521Snjl { 407151937Sjkim Info->Valid |= ACPI_VALID_HID; 408117521Snjl } 40967754Smsmith 410117521Snjl /* Execute the Device._UID method */ 41167754Smsmith 412151937Sjkim Status = AcpiUtExecute_UID (Node, &Info->UniqueId); 413117521Snjl if (ACPI_SUCCESS (Status)) 414117521Snjl { 415151937Sjkim Info->Valid |= ACPI_VALID_UID; 416117521Snjl } 417117521Snjl 418117521Snjl /* Execute the Device._CID method */ 419117521Snjl 420117521Snjl Status = AcpiUtExecute_CID (Node, &CidList); 421117521Snjl if (ACPI_SUCCESS (Status)) 422117521Snjl { 423167802Sjkim Size += CidList->Size; 424151937Sjkim Info->Valid |= ACPI_VALID_CID; 425117521Snjl } 426117521Snjl 427117521Snjl /* Execute the Device._STA method */ 428117521Snjl 429151937Sjkim Status = AcpiUtExecute_STA (Node, &Info->CurrentStatus); 430117521Snjl if (ACPI_SUCCESS (Status)) 431117521Snjl { 432151937Sjkim Info->Valid |= ACPI_VALID_STA; 433117521Snjl } 434117521Snjl 435117521Snjl /* Execute the Device._ADR method */ 436117521Snjl 437123315Snjl Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR, Node, 438151937Sjkim &Info->Address); 439117521Snjl if (ACPI_SUCCESS (Status)) 440117521Snjl { 441151937Sjkim Info->Valid |= ACPI_VALID_ADR; 442117521Snjl } 443117521Snjl 444126372Snjl /* Execute the Device._SxD methods */ 445126372Snjl 446151937Sjkim Status = AcpiUtExecute_Sxds (Node, Info->HighestDstates); 447126372Snjl if (ACPI_SUCCESS (Status)) 448126372Snjl { 449151937Sjkim Info->Valid |= ACPI_VALID_SXDS; 450126372Snjl } 45167754Smsmith } 45267754Smsmith 453117521Snjl /* Validate/Allocate/Clear caller buffer */ 45467754Smsmith 455117521Snjl Status = AcpiUtInitializeBuffer (Buffer, Size); 456117521Snjl if (ACPI_FAILURE (Status)) 45767754Smsmith { 458117521Snjl goto Cleanup; 45967754Smsmith } 46067754Smsmith 461117521Snjl /* Populate the return buffer */ 462117521Snjl 463117521Snjl ReturnInfo = Buffer->Pointer; 464151937Sjkim ACPI_MEMCPY (ReturnInfo, Info, sizeof (ACPI_DEVICE_INFO)); 465117521Snjl 466117521Snjl if (CidList) 46767754Smsmith { 468117521Snjl ACPI_MEMCPY (&ReturnInfo->CompatibilityId, CidList, CidList->Size); 46967754Smsmith } 47067754Smsmith 47167754Smsmith 472117521SnjlCleanup: 473167802Sjkim ACPI_FREE (Info); 474117521Snjl if (CidList) 47567754Smsmith { 476167802Sjkim ACPI_FREE (CidList); 47767754Smsmith } 478117521Snjl return (Status); 47967754Smsmith} 48067754Smsmith 481167802SjkimACPI_EXPORT_SYMBOL (AcpiGetObjectInfo) 482167802Sjkim 483193267Sjkim 484193267Sjkim/****************************************************************************** 485193267Sjkim * 486193267Sjkim * FUNCTION: AcpiInstallMethod 487193267Sjkim * 488193267Sjkim * PARAMETERS: Buffer - An ACPI table containing one control method 489193267Sjkim * 490193267Sjkim * RETURN: Status 491193267Sjkim * 492193267Sjkim * DESCRIPTION: Install a control method into the namespace. If the method 493193267Sjkim * name already exists in the namespace, it is overwritten. The 494193267Sjkim * input buffer must contain a valid DSDT or SSDT containing a 495193267Sjkim * single control method. 496193267Sjkim * 497193267Sjkim ******************************************************************************/ 498193267Sjkim 499193267SjkimACPI_STATUS 500193267SjkimAcpiInstallMethod ( 501193267Sjkim UINT8 *Buffer) 502193267Sjkim{ 503193267Sjkim ACPI_TABLE_HEADER *Table = ACPI_CAST_PTR (ACPI_TABLE_HEADER, Buffer); 504193267Sjkim UINT8 *AmlBuffer; 505193267Sjkim UINT8 *AmlStart; 506193267Sjkim char *Path; 507193267Sjkim ACPI_NAMESPACE_NODE *Node; 508193267Sjkim ACPI_OPERAND_OBJECT *MethodObj; 509193267Sjkim ACPI_PARSE_STATE ParserState; 510193267Sjkim UINT32 AmlLength; 511193267Sjkim UINT16 Opcode; 512193267Sjkim UINT8 MethodFlags; 513193267Sjkim ACPI_STATUS Status; 514193267Sjkim 515193267Sjkim 516193267Sjkim /* Parameter validation */ 517193267Sjkim 518193267Sjkim if (!Buffer) 519193267Sjkim { 520193267Sjkim return (AE_BAD_PARAMETER); 521193267Sjkim } 522193267Sjkim 523193267Sjkim /* Table must be a DSDT or SSDT */ 524193267Sjkim 525193267Sjkim if (!ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_DSDT) && 526193267Sjkim !ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_SSDT)) 527193267Sjkim { 528193267Sjkim return (AE_BAD_HEADER); 529193267Sjkim } 530193267Sjkim 531193267Sjkim /* First AML opcode in the table must be a control method */ 532193267Sjkim 533193267Sjkim ParserState.Aml = Buffer + sizeof (ACPI_TABLE_HEADER); 534193267Sjkim Opcode = AcpiPsPeekOpcode (&ParserState); 535193267Sjkim if (Opcode != AML_METHOD_OP) 536193267Sjkim { 537193267Sjkim return (AE_BAD_PARAMETER); 538193267Sjkim } 539193267Sjkim 540193267Sjkim /* Extract method information from the raw AML */ 541193267Sjkim 542193267Sjkim ParserState.Aml += AcpiPsGetOpcodeSize (Opcode); 543193267Sjkim ParserState.PkgEnd = AcpiPsGetNextPackageEnd (&ParserState); 544193267Sjkim Path = AcpiPsGetNextNamestring (&ParserState); 545193267Sjkim MethodFlags = *ParserState.Aml++; 546193267Sjkim AmlStart = ParserState.Aml; 547193267Sjkim AmlLength = ACPI_PTR_DIFF (ParserState.PkgEnd, AmlStart); 548193267Sjkim 549193267Sjkim /* 550193267Sjkim * Allocate resources up-front. We don't want to have to delete a new 551193267Sjkim * node from the namespace if we cannot allocate memory. 552193267Sjkim */ 553193267Sjkim AmlBuffer = ACPI_ALLOCATE (AmlLength); 554193267Sjkim if (!AmlBuffer) 555193267Sjkim { 556193267Sjkim return (AE_NO_MEMORY); 557193267Sjkim } 558193267Sjkim 559193267Sjkim MethodObj = AcpiUtCreateInternalObject (ACPI_TYPE_METHOD); 560193267Sjkim if (!MethodObj) 561193267Sjkim { 562193267Sjkim ACPI_FREE (AmlBuffer); 563193267Sjkim return (AE_NO_MEMORY); 564193267Sjkim } 565193267Sjkim 566193267Sjkim /* Lock namespace for AcpiNsLookup, we may be creating a new node */ 567193267Sjkim 568193267Sjkim Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 569193267Sjkim if (ACPI_FAILURE (Status)) 570193267Sjkim { 571193267Sjkim goto ErrorExit; 572193267Sjkim } 573193267Sjkim 574193267Sjkim /* The lookup either returns an existing node or creates a new one */ 575193267Sjkim 576193267Sjkim Status = AcpiNsLookup (NULL, Path, ACPI_TYPE_METHOD, ACPI_IMODE_LOAD_PASS1, 577193267Sjkim ACPI_NS_DONT_OPEN_SCOPE | ACPI_NS_ERROR_IF_FOUND, NULL, &Node); 578193267Sjkim 579193267Sjkim (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 580193267Sjkim 581193267Sjkim if (ACPI_FAILURE (Status)) /* NsLookup */ 582193267Sjkim { 583193267Sjkim if (Status != AE_ALREADY_EXISTS) 584193267Sjkim { 585193267Sjkim goto ErrorExit; 586193267Sjkim } 587193267Sjkim 588193267Sjkim /* Node existed previously, make sure it is a method node */ 589193267Sjkim 590193267Sjkim if (Node->Type != ACPI_TYPE_METHOD) 591193267Sjkim { 592193267Sjkim Status = AE_TYPE; 593193267Sjkim goto ErrorExit; 594193267Sjkim } 595193267Sjkim } 596193267Sjkim 597193267Sjkim /* Copy the method AML to the local buffer */ 598193267Sjkim 599193267Sjkim ACPI_MEMCPY (AmlBuffer, AmlStart, AmlLength); 600193267Sjkim 601193267Sjkim /* Initialize the method object with the new method's information */ 602193267Sjkim 603193267Sjkim MethodObj->Method.AmlStart = AmlBuffer; 604193267Sjkim MethodObj->Method.AmlLength = AmlLength; 605193267Sjkim 606193267Sjkim MethodObj->Method.ParamCount = (UINT8) 607193267Sjkim (MethodFlags & AML_METHOD_ARG_COUNT); 608193267Sjkim 609193267Sjkim MethodObj->Method.MethodFlags = (UINT8) 610193267Sjkim (MethodFlags & ~AML_METHOD_ARG_COUNT); 611193267Sjkim 612193267Sjkim if (MethodFlags & AML_METHOD_SERIALIZED) 613193267Sjkim { 614193267Sjkim MethodObj->Method.SyncLevel = (UINT8) 615193267Sjkim ((MethodFlags & AML_METHOD_SYNC_LEVEL) >> 4); 616193267Sjkim } 617193267Sjkim 618193267Sjkim /* 619193267Sjkim * Now that it is complete, we can attach the new method object to 620193267Sjkim * the method Node (detaches/deletes any existing object) 621193267Sjkim */ 622193267Sjkim Status = AcpiNsAttachObject (Node, MethodObj, 623193267Sjkim ACPI_TYPE_METHOD); 624193267Sjkim 625193267Sjkim /* 626193267Sjkim * Flag indicates AML buffer is dynamic, must be deleted later. 627193267Sjkim * Must be set only after attach above. 628193267Sjkim */ 629193267Sjkim Node->Flags |= ANOBJ_ALLOCATED_BUFFER; 630193267Sjkim 631193267Sjkim /* Remove local reference to the method object */ 632193267Sjkim 633193267Sjkim AcpiUtRemoveReference (MethodObj); 634193267Sjkim return (Status); 635193267Sjkim 636193267Sjkim 637193267SjkimErrorExit: 638193267Sjkim 639193267Sjkim ACPI_FREE (AmlBuffer); 640193267Sjkim ACPI_FREE (MethodObj); 641193267Sjkim return (Status); 642193267Sjkim} 643193267Sjkim 644193267SjkimACPI_EXPORT_SYMBOL (AcpiInstallMethod) 645