| 0,0 → 1,776 |
|---|
| /****************************************************************************** |
| * |
| * Module Name: nsxfname - Public interfaces to the ACPI subsystem |
| * ACPI Namespace oriented interfaces |
| * |
| *****************************************************************************/ |
| |
| /****************************************************************************** |
| * |
| * 1. Copyright Notice |
| * |
| * Some or all of this work - Copyright (c) 1999 - 2010, Intel Corp. |
| * All rights reserved. |
| * |
| * 2. License |
| * |
| * 2.1. This is your license from Intel Corp. under its intellectual property |
| * rights. You may have additional license terms from the party that provided |
| * you this software, covering your right to use that party's intellectual |
| * property rights. |
| * |
| * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a |
| * copy of the source code appearing in this file ("Covered Code") an |
| * irrevocable, perpetual, worldwide license under Intel's copyrights in the |
| * base code distributed originally by Intel ("Original Intel Code") to copy, |
| * make derivatives, distribute, use and display any portion of the Covered |
| * Code in any form, with the right to sublicense such rights; and |
| * |
| * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent |
| * license (with the right to sublicense), under only those claims of Intel |
| * patents that are infringed by the Original Intel Code, to make, use, sell, |
| * offer to sell, and import the Covered Code and derivative works thereof |
| * solely to the minimum extent necessary to exercise the above copyright |
| * license, and in no event shall the patent license extend to any additions |
| * to or modifications of the Original Intel Code. No other license or right |
| * is granted directly or by implication, estoppel or otherwise; |
| * |
| * The above copyright and patent license is granted only if the following |
| * conditions are met: |
| * |
| * 3. Conditions |
| * |
| * 3.1. Redistribution of Source with Rights to Further Distribute Source. |
| * Redistribution of source code of any substantial portion of the Covered |
| * Code or modification with rights to further distribute source must include |
| * the above Copyright Notice, the above License, this list of Conditions, |
| * and the following Disclaimer and Export Compliance provision. In addition, |
| * Licensee must cause all Covered Code to which Licensee contributes to |
| * contain a file documenting the changes Licensee made to create that Covered |
| * Code and the date of any change. Licensee must include in that file the |
| * documentation of any changes made by any predecessor Licensee. Licensee |
| * must include a prominent statement that the modification is derived, |
| * directly or indirectly, from Original Intel Code. |
| * |
| * 3.2. Redistribution of Source with no Rights to Further Distribute Source. |
| * Redistribution of source code of any substantial portion of the Covered |
| * Code or modification without rights to further distribute source must |
| * include the following Disclaimer and Export Compliance provision in the |
| * documentation and/or other materials provided with distribution. In |
| * addition, Licensee may not authorize further sublicense of source of any |
| * portion of the Covered Code, and must include terms to the effect that the |
| * license from Licensee to its licensee is limited to the intellectual |
| * property embodied in the software Licensee provides to its licensee, and |
| * not to intellectual property embodied in modifications its licensee may |
| * make. |
| * |
| * 3.3. Redistribution of Executable. Redistribution in executable form of any |
| * substantial portion of the Covered Code or modification must reproduce the |
| * above Copyright Notice, and the following Disclaimer and Export Compliance |
| * provision in the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3.4. Intel retains all right, title, and interest in and to the Original |
| * Intel Code. |
| * |
| * 3.5. Neither the name Intel nor any other trademark owned or controlled by |
| * Intel shall be used in advertising or otherwise to promote the sale, use or |
| * other dealings in products derived from or relating to the Covered Code |
| * without prior written authorization from Intel. |
| * |
| * 4. Disclaimer and Export Compliance |
| * |
| * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED |
| * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE |
| * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, |
| * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY |
| * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY |
| * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A |
| * PARTICULAR PURPOSE. |
| * |
| * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES |
| * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR |
| * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, |
| * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY |
| * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL |
| * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS |
| * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY |
| * LIMITED REMEDY. |
| * |
| * 4.3. Licensee shall not export, either directly or indirectly, any of this |
| * software or system incorporating such software without first obtaining any |
| * required license or other approval from the U. S. Department of Commerce or |
| * any other agency or department of the United States Government. In the |
| * event Licensee exports any such software from the United States or |
| * re-exports any such software from a foreign destination, Licensee shall |
| * ensure that the distribution and export/re-export of the software is in |
| * compliance with all laws, regulations, orders, or other restrictions of the |
| * U.S. Export Administration Regulations. Licensee agrees that neither it nor |
| * any of its subsidiaries will export/re-export any technical data, process, |
| * software, or service, directly or indirectly, to any country for which the |
| * United States government or any agency thereof requires an export license, |
| * other governmental approval, or letter of assurance, without first obtaining |
| * such license, approval or letter. |
| * |
| *****************************************************************************/ |
| |
| #define __NSXFNAME_C__ |
| |
| #include "acpi.h" |
| #include "accommon.h" |
| #include "acnamesp.h" |
| #include "acparser.h" |
| #include "amlcode.h" |
| |
| |
| #define _COMPONENT ACPI_NAMESPACE |
| ACPI_MODULE_NAME ("nsxfname") |
| |
| /* Local prototypes */ |
| |
| static char * |
| AcpiNsCopyDeviceId ( |
| ACPI_DEVICE_ID *Dest, |
| ACPI_DEVICE_ID *Source, |
| char *StringArea); |
| |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: AcpiGetHandle |
| * |
| * PARAMETERS: Parent - Object to search under (search scope). |
| * Pathname - Pointer to an asciiz string containing the |
| * name |
| * RetHandle - Where the return handle is returned |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: This routine will search for a caller specified name in the |
| * name space. The caller can restrict the search region by |
| * specifying a non NULL parent. The parent value is itself a |
| * namespace handle. |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiGetHandle ( |
| ACPI_HANDLE Parent, |
| ACPI_STRING Pathname, |
| ACPI_HANDLE *RetHandle) |
| { |
| ACPI_STATUS Status; |
| ACPI_NAMESPACE_NODE *Node = NULL; |
| ACPI_NAMESPACE_NODE *PrefixNode = NULL; |
| |
| |
| ACPI_FUNCTION_ENTRY (); |
| |
| |
| /* Parameter Validation */ |
| |
| if (!RetHandle || !Pathname) |
| { |
| return (AE_BAD_PARAMETER); |
| } |
| |
| /* Convert a parent handle to a prefix node */ |
| |
| if (Parent) |
| { |
| PrefixNode = AcpiNsValidateHandle (Parent); |
| if (!PrefixNode) |
| { |
| return (AE_BAD_PARAMETER); |
| } |
| } |
| |
| /* |
| * Valid cases are: |
| * 1) Fully qualified pathname |
| * 2) Parent + Relative pathname |
| * |
| * Error for <null Parent + relative path> |
| */ |
| if (AcpiNsValidRootPrefix (Pathname[0])) |
| { |
| /* Pathname is fully qualified (starts with '\') */ |
| |
| /* Special case for root-only, since we can't search for it */ |
| |
| if (!ACPI_STRCMP (Pathname, ACPI_NS_ROOT_PATH)) |
| { |
| *RetHandle = ACPI_CAST_PTR (ACPI_HANDLE, AcpiGbl_RootNode); |
| return (AE_OK); |
| } |
| } |
| else if (!PrefixNode) |
| { |
| /* Relative path with null prefix is disallowed */ |
| |
| return (AE_BAD_PARAMETER); |
| } |
| |
| /* Find the Node and convert to a handle */ |
| |
| Status = AcpiNsGetNode (PrefixNode, Pathname, ACPI_NS_NO_UPSEARCH, &Node); |
| if (ACPI_SUCCESS (Status)) |
| { |
| *RetHandle = ACPI_CAST_PTR (ACPI_HANDLE, Node); |
| } |
| |
| return (Status); |
| } |
| |
| ACPI_EXPORT_SYMBOL (AcpiGetHandle) |
| |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: AcpiGetName |
| * |
| * PARAMETERS: Handle - Handle to be converted to a pathname |
| * NameType - Full pathname or single segment |
| * Buffer - Buffer for returned path |
| * |
| * RETURN: Pointer to a string containing the fully qualified Name. |
| * |
| * DESCRIPTION: This routine returns the fully qualified name associated with |
| * the Handle parameter. This and the AcpiPathnameToHandle are |
| * complementary functions. |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiGetName ( |
| ACPI_HANDLE Handle, |
| UINT32 NameType, |
| ACPI_BUFFER *Buffer) |
| { |
| ACPI_STATUS Status; |
| ACPI_NAMESPACE_NODE *Node; |
| |
| |
| /* Parameter validation */ |
| |
| if (NameType > ACPI_NAME_TYPE_MAX) |
| { |
| return (AE_BAD_PARAMETER); |
| } |
| |
| Status = AcpiUtValidateBuffer (Buffer); |
| if (ACPI_FAILURE (Status)) |
| { |
| return (Status); |
| } |
| |
| if (NameType == ACPI_FULL_PATHNAME) |
| { |
| /* Get the full pathname (From the namespace root) */ |
| |
| Status = AcpiNsHandleToPathname (Handle, Buffer); |
| return (Status); |
| } |
| |
| /* |
| * Wants the single segment ACPI name. |
| * Validate handle and convert to a namespace Node |
| */ |
| Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); |
| if (ACPI_FAILURE (Status)) |
| { |
| return (Status); |
| } |
| |
| Node = AcpiNsValidateHandle (Handle); |
| if (!Node) |
| { |
| Status = AE_BAD_PARAMETER; |
| goto UnlockAndExit; |
| } |
| |
| /* Validate/Allocate/Clear caller buffer */ |
| |
| Status = AcpiUtInitializeBuffer (Buffer, ACPI_PATH_SEGMENT_LENGTH); |
| if (ACPI_FAILURE (Status)) |
| { |
| goto UnlockAndExit; |
| } |
| |
| /* Just copy the ACPI name from the Node and zero terminate it */ |
| |
| ACPI_STRNCPY (Buffer->Pointer, AcpiUtGetNodeName (Node), |
| ACPI_NAME_SIZE); |
| ((char *) Buffer->Pointer) [ACPI_NAME_SIZE] = 0; |
| Status = AE_OK; |
| |
| |
| UnlockAndExit: |
| |
| (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
| return (Status); |
| } |
| |
| ACPI_EXPORT_SYMBOL (AcpiGetName) |
| |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: AcpiNsCopyDeviceId |
| * |
| * PARAMETERS: Dest - Pointer to the destination DEVICE_ID |
| * Source - Pointer to the source DEVICE_ID |
| * StringArea - Pointer to where to copy the dest string |
| * |
| * RETURN: Pointer to the next string area |
| * |
| * DESCRIPTION: Copy a single DEVICE_ID, including the string data. |
| * |
| ******************************************************************************/ |
| |
| static char * |
| AcpiNsCopyDeviceId ( |
| ACPI_DEVICE_ID *Dest, |
| ACPI_DEVICE_ID *Source, |
| char *StringArea) |
| { |
| /* Create the destination DEVICE_ID */ |
| |
| Dest->String = StringArea; |
| Dest->Length = Source->Length; |
| |
| /* Copy actual string and return a pointer to the next string area */ |
| |
| ACPI_MEMCPY (StringArea, Source->String, Source->Length); |
| return (StringArea + Source->Length); |
| } |
| |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: AcpiGetObjectInfo |
| * |
| * PARAMETERS: Handle - Object Handle |
| * ReturnBuffer - Where the info is returned |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Returns information about an object as gleaned from the |
| * namespace node and possibly by running several standard |
| * control methods (Such as in the case of a device.) |
| * |
| * For Device and Processor objects, run the Device _HID, _UID, _CID, _STA, |
| * _ADR, _SxW, and _SxD methods. |
| * |
| * Note: Allocates the return buffer, must be freed by the caller. |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiGetObjectInfo ( |
| ACPI_HANDLE Handle, |
| ACPI_DEVICE_INFO **ReturnBuffer) |
| { |
| ACPI_NAMESPACE_NODE *Node; |
| ACPI_DEVICE_INFO *Info; |
| ACPI_DEVICE_ID_LIST *CidList = NULL; |
| ACPI_DEVICE_ID *Hid = NULL; |
| ACPI_DEVICE_ID *Uid = NULL; |
| char *NextIdString; |
| ACPI_OBJECT_TYPE Type; |
| ACPI_NAME Name; |
| UINT8 ParamCount= 0; |
| UINT8 Valid = 0; |
| UINT32 InfoSize; |
| UINT32 i; |
| ACPI_STATUS Status; |
| |
| |
| /* Parameter validation */ |
| |
| if (!Handle || !ReturnBuffer) |
| { |
| return (AE_BAD_PARAMETER); |
| } |
| |
| Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); |
| if (ACPI_FAILURE (Status)) |
| { |
| goto Cleanup; |
| } |
| |
| Node = AcpiNsValidateHandle (Handle); |
| if (!Node) |
| { |
| (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
| return (AE_BAD_PARAMETER); |
| } |
| |
| /* Get the namespace node data while the namespace is locked */ |
| |
| InfoSize = sizeof (ACPI_DEVICE_INFO); |
| Type = Node->Type; |
| Name = Node->Name.Integer; |
| |
| if (Node->Type == ACPI_TYPE_METHOD) |
| { |
| ParamCount = Node->Object->Method.ParamCount; |
| } |
| |
| Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
| if (ACPI_FAILURE (Status)) |
| { |
| return (Status); |
| } |
| |
| if ((Type == ACPI_TYPE_DEVICE) || |
| (Type == ACPI_TYPE_PROCESSOR)) |
| { |
| /* |
| * Get extra info for ACPI Device/Processor objects only: |
| * Run the Device _HID, _UID, and _CID methods. |
| * |
| * Note: none of these methods are required, so they may or may |
| * not be present for this device. The Info->Valid bitfield is used |
| * to indicate which methods were found and run successfully. |
| */ |
| |
| /* Execute the Device._HID method */ |
| |
| Status = AcpiUtExecute_HID (Node, &Hid); |
| if (ACPI_SUCCESS (Status)) |
| { |
| InfoSize += Hid->Length; |
| Valid |= ACPI_VALID_HID; |
| } |
| |
| /* Execute the Device._UID method */ |
| |
| Status = AcpiUtExecute_UID (Node, &Uid); |
| if (ACPI_SUCCESS (Status)) |
| { |
| InfoSize += Uid->Length; |
| Valid |= ACPI_VALID_UID; |
| } |
| |
| /* Execute the Device._CID method */ |
| |
| Status = AcpiUtExecute_CID (Node, &CidList); |
| if (ACPI_SUCCESS (Status)) |
| { |
| /* Add size of CID strings and CID pointer array */ |
| |
| InfoSize += (CidList->ListSize - sizeof (ACPI_DEVICE_ID_LIST)); |
| Valid |= ACPI_VALID_CID; |
| } |
| } |
| |
| /* |
| * Now that we have the variable-length data, we can allocate the |
| * return buffer |
| */ |
| Info = ACPI_ALLOCATE_ZEROED (InfoSize); |
| if (!Info) |
| { |
| Status = AE_NO_MEMORY; |
| goto Cleanup; |
| } |
| |
| /* Get the fixed-length data */ |
| |
| if ((Type == ACPI_TYPE_DEVICE) || |
| (Type == ACPI_TYPE_PROCESSOR)) |
| { |
| /* |
| * Get extra info for ACPI Device/Processor objects only: |
| * Run the _STA, _ADR and, SxW, and _SxD methods. |
| * |
| * Note: none of these methods are required, so they may or may |
| * not be present for this device. The Info->Valid bitfield is used |
| * to indicate which methods were found and run successfully. |
| */ |
| |
| /* Execute the Device._STA method */ |
| |
| Status = AcpiUtExecute_STA (Node, &Info->CurrentStatus); |
| if (ACPI_SUCCESS (Status)) |
| { |
| Valid |= ACPI_VALID_STA; |
| } |
| |
| /* Execute the Device._ADR method */ |
| |
| Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR, Node, |
| &Info->Address); |
| if (ACPI_SUCCESS (Status)) |
| { |
| Valid |= ACPI_VALID_ADR; |
| } |
| |
| /* Execute the Device._SxW methods */ |
| |
| Status = AcpiUtExecutePowerMethods (Node, |
| AcpiGbl_LowestDstateNames, ACPI_NUM_SxW_METHODS, |
| Info->LowestDstates); |
| if (ACPI_SUCCESS (Status)) |
| { |
| Valid |= ACPI_VALID_SXWS; |
| } |
| |
| /* Execute the Device._SxD methods */ |
| |
| Status = AcpiUtExecutePowerMethods (Node, |
| AcpiGbl_HighestDstateNames, ACPI_NUM_SxD_METHODS, |
| Info->HighestDstates); |
| if (ACPI_SUCCESS (Status)) |
| { |
| Valid |= ACPI_VALID_SXDS; |
| } |
| } |
| |
| /* |
| * Create a pointer to the string area of the return buffer. |
| * Point to the end of the base ACPI_DEVICE_INFO structure. |
| */ |
| NextIdString = ACPI_CAST_PTR (char, Info->CompatibleIdList.Ids); |
| if (CidList) |
| { |
| /* Point past the CID DEVICE_ID array */ |
| |
| NextIdString += ((ACPI_SIZE) CidList->Count * sizeof (ACPI_DEVICE_ID)); |
| } |
| |
| /* |
| * Copy the HID, UID, and CIDs to the return buffer. The variable-length |
| * strings are copied to the reserved area at the end of the buffer. |
| * |
| * For HID and CID, check if the ID is a PCI Root Bridge. |
| */ |
| if (Hid) |
| { |
| NextIdString = AcpiNsCopyDeviceId (&Info->HardwareId, |
| Hid, NextIdString); |
| |
| if (AcpiUtIsPciRootBridge (Hid->String)) |
| { |
| Info->Flags |= ACPI_PCI_ROOT_BRIDGE; |
| } |
| } |
| |
| if (Uid) |
| { |
| NextIdString = AcpiNsCopyDeviceId (&Info->UniqueId, |
| Uid, NextIdString); |
| } |
| |
| if (CidList) |
| { |
| Info->CompatibleIdList.Count = CidList->Count; |
| Info->CompatibleIdList.ListSize = CidList->ListSize; |
| |
| /* Copy each CID */ |
| |
| for (i = 0; i < CidList->Count; i++) |
| { |
| NextIdString = AcpiNsCopyDeviceId (&Info->CompatibleIdList.Ids[i], |
| &CidList->Ids[i], NextIdString); |
| |
| if (AcpiUtIsPciRootBridge (CidList->Ids[i].String)) |
| { |
| Info->Flags |= ACPI_PCI_ROOT_BRIDGE; |
| } |
| } |
| } |
| |
| /* Copy the fixed-length data */ |
| |
| Info->InfoSize = InfoSize; |
| Info->Type = Type; |
| Info->Name = Name; |
| Info->ParamCount = ParamCount; |
| Info->Valid = Valid; |
| |
| *ReturnBuffer = Info; |
| Status = AE_OK; |
| |
| |
| Cleanup: |
| if (Hid) |
| { |
| ACPI_FREE (Hid); |
| } |
| if (Uid) |
| { |
| ACPI_FREE (Uid); |
| } |
| if (CidList) |
| { |
| ACPI_FREE (CidList); |
| } |
| return (Status); |
| } |
| |
| ACPI_EXPORT_SYMBOL (AcpiGetObjectInfo) |
| |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: AcpiInstallMethod |
| * |
| * PARAMETERS: Buffer - An ACPI table containing one control method |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Install a control method into the namespace. If the method |
| * name already exists in the namespace, it is overwritten. The |
| * input buffer must contain a valid DSDT or SSDT containing a |
| * single control method. |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiInstallMethod ( |
| UINT8 *Buffer) |
| { |
| ACPI_TABLE_HEADER *Table = ACPI_CAST_PTR (ACPI_TABLE_HEADER, Buffer); |
| UINT8 *AmlBuffer; |
| UINT8 *AmlStart; |
| char *Path; |
| ACPI_NAMESPACE_NODE *Node; |
| ACPI_OPERAND_OBJECT *MethodObj; |
| ACPI_PARSE_STATE ParserState; |
| UINT32 AmlLength; |
| UINT16 Opcode; |
| UINT8 MethodFlags; |
| ACPI_STATUS Status; |
| |
| |
| /* Parameter validation */ |
| |
| if (!Buffer) |
| { |
| return (AE_BAD_PARAMETER); |
| } |
| |
| /* Table must be a DSDT or SSDT */ |
| |
| if (!ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_DSDT) && |
| !ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_SSDT)) |
| { |
| return (AE_BAD_HEADER); |
| } |
| |
| /* First AML opcode in the table must be a control method */ |
| |
| ParserState.Aml = Buffer + sizeof (ACPI_TABLE_HEADER); |
| Opcode = AcpiPsPeekOpcode (&ParserState); |
| if (Opcode != AML_METHOD_OP) |
| { |
| return (AE_BAD_PARAMETER); |
| } |
| |
| /* Extract method information from the raw AML */ |
| |
| ParserState.Aml += AcpiPsGetOpcodeSize (Opcode); |
| ParserState.PkgEnd = AcpiPsGetNextPackageEnd (&ParserState); |
| Path = AcpiPsGetNextNamestring (&ParserState); |
| MethodFlags = *ParserState.Aml++; |
| AmlStart = ParserState.Aml; |
| AmlLength = ACPI_PTR_DIFF (ParserState.PkgEnd, AmlStart); |
| |
| /* |
| * Allocate resources up-front. We don't want to have to delete a new |
| * node from the namespace if we cannot allocate memory. |
| */ |
| AmlBuffer = ACPI_ALLOCATE (AmlLength); |
| if (!AmlBuffer) |
| { |
| return (AE_NO_MEMORY); |
| } |
| |
| MethodObj = AcpiUtCreateInternalObject (ACPI_TYPE_METHOD); |
| if (!MethodObj) |
| { |
| ACPI_FREE (AmlBuffer); |
| return (AE_NO_MEMORY); |
| } |
| |
| /* Lock namespace for AcpiNsLookup, we may be creating a new node */ |
| |
| Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); |
| if (ACPI_FAILURE (Status)) |
| { |
| goto ErrorExit; |
| } |
| |
| /* The lookup either returns an existing node or creates a new one */ |
| |
| Status = AcpiNsLookup (NULL, Path, ACPI_TYPE_METHOD, ACPI_IMODE_LOAD_PASS1, |
| ACPI_NS_DONT_OPEN_SCOPE | ACPI_NS_ERROR_IF_FOUND, NULL, &Node); |
| |
| (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
| |
| if (ACPI_FAILURE (Status)) /* NsLookup */ |
| { |
| if (Status != AE_ALREADY_EXISTS) |
| { |
| goto ErrorExit; |
| } |
| |
| /* Node existed previously, make sure it is a method node */ |
| |
| if (Node->Type != ACPI_TYPE_METHOD) |
| { |
| Status = AE_TYPE; |
| goto ErrorExit; |
| } |
| } |
| |
| /* Copy the method AML to the local buffer */ |
| |
| ACPI_MEMCPY (AmlBuffer, AmlStart, AmlLength); |
| |
| /* Initialize the method object with the new method's information */ |
| |
| MethodObj->Method.AmlStart = AmlBuffer; |
| MethodObj->Method.AmlLength = AmlLength; |
| |
| MethodObj->Method.ParamCount = (UINT8) |
| (MethodFlags & AML_METHOD_ARG_COUNT); |
| |
| MethodObj->Method.MethodFlags = (UINT8) |
| (MethodFlags & ~AML_METHOD_ARG_COUNT); |
| |
| if (MethodFlags & AML_METHOD_SERIALIZED) |
| { |
| MethodObj->Method.SyncLevel = (UINT8) |
| ((MethodFlags & AML_METHOD_SYNC_LEVEL) >> 4); |
| } |
| |
| /* |
| * Now that it is complete, we can attach the new method object to |
| * the method Node (detaches/deletes any existing object) |
| */ |
| Status = AcpiNsAttachObject (Node, MethodObj, |
| ACPI_TYPE_METHOD); |
| |
| /* |
| * Flag indicates AML buffer is dynamic, must be deleted later. |
| * Must be set only after attach above. |
| */ |
| Node->Flags |= ANOBJ_ALLOCATED_BUFFER; |
| |
| /* Remove local reference to the method object */ |
| |
| AcpiUtRemoveReference (MethodObj); |
| return (Status); |
| |
| |
| ErrorExit: |
| |
| ACPI_FREE (AmlBuffer); |
| ACPI_FREE (MethodObj); |
| return (Status); |
| } |
| |
| ACPI_EXPORT_SYMBOL (AcpiInstallMethod) |