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 /******************************************************************************
  *
  * 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 - 2024, 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.
  *
  *****************************************************************************
  *
  * Alternatively, you may choose to be licensed under the terms of the
  * following license:
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions, and the following disclaimer,
  *    without modification.
  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  *    substantially similar to the "NO WARRANTY" disclaimer below
  *    ("Disclaimer") and any redistribution must be conditioned upon
  *    including a substantially similar Disclaimer requirement for further
  *    binary redistribution.
  * 3. Neither the names of the above-listed copyright holders nor the names
  *    of any contributors may be used to endorse or promote products derived
  *    from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  * Alternatively, you may choose to be licensed under the terms of the
  * GNU General Public License ("GPL") version 2 as published by the Free
  * Software Foundation.
  *
  *****************************************************************************/
 
 #define EXPORT_ACPI_INTERFACES
 
 #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_PNP_DEVICE_ID      *Dest,
     ACPI_PNP_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,
     const char              *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 (ACPI_IS_ROOT_PREFIX (Pathname[0]))
     {
         /* Pathname is fully qualified (starts with '\') */
 
         /* Special case for root-only, since we can't search for it */
 
         if (!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;
 
 
     /* Parameter validation */
 
     if (NameType > ACPI_NAME_TYPE_MAX)
     {
         return (AE_BAD_PARAMETER);
     }
 
     Status = AcpiUtValidateBuffer (Buffer);
     if (ACPI_FAILURE (Status))
     {
         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);
     }
 
     if (NameType == ACPI_FULL_PATHNAME ||
         NameType == ACPI_FULL_PATHNAME_NO_TRAILING)
     {
         /* Get the full pathname (From the namespace root) */
 
         Status = AcpiNsHandleToPathname (Handle, Buffer,
             NameType == ACPI_FULL_PATHNAME ? FALSE : TRUE);
     }
     else
     {
         /* Get the single name */
 
         Status = AcpiNsHandleToName (Handle, Buffer);
     }
 
     (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
     return (Status);
 }
 
 ACPI_EXPORT_SYMBOL (AcpiGetName)
 
 
 /******************************************************************************
  *
  * FUNCTION:    AcpiNsCopyDeviceId
  *
  * PARAMETERS:  Dest                - Pointer to the destination PNP_DEVICE_ID
  *              Source              - Pointer to the source PNP_DEVICE_ID
  *              StringArea          - Pointer to where to copy the dest string
  *
  * RETURN:      Pointer to the next string area
  *
  * DESCRIPTION: Copy a single PNP_DEVICE_ID, including the string data.
  *
  ******************************************************************************/
 
 static char *
 AcpiNsCopyDeviceId (
     ACPI_PNP_DEVICE_ID      *Dest,
     ACPI_PNP_DEVICE_ID      *Source,
     char                    *StringArea)
 {
     /* Create the destination PNP_DEVICE_ID */
 
     Dest->String = StringArea;
     Dest->Length = Source->Length;
 
     /* Copy actual string and return a pointer to the next string area */
 
     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,
  * _CLS, _ADR, _SxW, and _SxD methods.
  *
  * Note: Allocates the return buffer, must be freed by the caller.
  *
  * Note: This interface is intended to be used during the initial device
  * discovery namespace traversal. Therefore, no complex methods can be
  * executed, especially those that access operation regions. Therefore, do
  * not add any additional methods that could cause problems in this area.
  * Because of this reason support for the following methods has been removed:
  * 1) _SUB method was removed (11/2015)
  * 2) _STA method was removed (02/2018)
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiGetObjectInfo (
     ACPI_HANDLE             Handle,
     ACPI_DEVICE_INFO        **ReturnBuffer)
 {
     ACPI_NAMESPACE_NODE     *Node;
     ACPI_DEVICE_INFO        *Info;
     ACPI_PNP_DEVICE_ID_LIST *CidList = NULL;
     ACPI_PNP_DEVICE_ID      *Hid = NULL;
     ACPI_PNP_DEVICE_ID      *Uid = NULL;
     ACPI_PNP_DEVICE_ID      *Cls = NULL;
     char                    *NextIdString;
     ACPI_OBJECT_TYPE        Type;
     ACPI_NAME               Name;
     UINT8                   ParamCount= 0;
     UINT16                  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))
     {
         return (Status);
     }
 
     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, _CLS, 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_PNP_DEVICE_ID_LIST));
             Valid |= ACPI_VALID_CID;
         }
 
         /* Execute the Device._CLS method */
 
         Status = AcpiUtExecute_CLS (Node, &Cls);
         if (ACPI_SUCCESS (Status))
         {
             InfoSize += Cls->Length;
             Valid |= ACPI_VALID_CLS;
         }
     }
 
     /*
      * 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 _ADR and, SxW, and _SxD methods.
          *
          * Notes: 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._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 PNP_DEVICE_ID array */
 
         NextIdString += ((ACPI_SIZE) CidList->Count * sizeof (ACPI_PNP_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;
             }
         }
     }
 
     if (Cls)
     {
        (void) AcpiNsCopyDeviceId (&Info->ClassCode,
             Cls, NextIdString);
     }
 
     /* 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);
     }
     if (Cls)
     {
         ACPI_FREE (Cls);
     }
     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_NAMESEG (Table->Signature, ACPI_SIG_DSDT) &&
         !ACPI_COMPARE_NAMESEG (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 = (UINT32) 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 */
 
     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);
 
     if (MethodFlags & AML_METHOD_SERIALIZED)
     {
         MethodObj->Method.InfoFlags = ACPI_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)

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