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 /******************************************************************************
  *
  * Module Name: excreate - Named object creation
  *
  *****************************************************************************/
 
 /******************************************************************************
  *
  * 1. Copyright Notice
  *
  * Some or all of this work - Copyright (c) 1999 - 2009, 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 __EXCREATE_C__
 
 #include "acpi.h"
 #include "accommon.h"
 #include "acinterp.h"
 #include "amlcode.h"
 #include "acnamesp.h"
 
 
 #define _COMPONENT          ACPI_EXECUTER
         ACPI_MODULE_NAME    ("excreate")
 
 
 #ifndef ACPI_NO_METHOD_EXECUTION
 /*******************************************************************************
  *
  * FUNCTION:    AcpiExCreateAlias
  *
  * PARAMETERS:  WalkState            - Current state, contains operands
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Create a new named alias
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiExCreateAlias (
     ACPI_WALK_STATE         *WalkState)
 {
     ACPI_NAMESPACE_NODE     *TargetNode;
     ACPI_NAMESPACE_NODE     *AliasNode;
     ACPI_STATUS             Status = AE_OK;
 
 
     ACPI_FUNCTION_TRACE (ExCreateAlias);
 
 
     /* Get the source/alias operands (both namespace nodes) */
 
     AliasNode =  (ACPI_NAMESPACE_NODE *) WalkState->Operands[0];
     TargetNode = (ACPI_NAMESPACE_NODE *) WalkState->Operands[1];
 
     if ((TargetNode->Type == ACPI_TYPE_LOCAL_ALIAS)  ||
         (TargetNode->Type == ACPI_TYPE_LOCAL_METHOD_ALIAS))
     {
         /*
          * Dereference an existing alias so that we don't create a chain
          * of aliases.  With this code, we guarantee that an alias is
          * always exactly one level of indirection away from the
          * actual aliased name.
          */
         TargetNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, TargetNode->Object);
     }
 
     /*
      * For objects that can never change (i.e., the NS node will
      * permanently point to the same object), we can simply attach
      * the object to the new NS node.  For other objects (such as
      * Integers, buffers, etc.), we have to point the Alias node
      * to the original Node.
      */
     switch (TargetNode->Type)
     {
 
     /* For these types, the sub-object can change dynamically via a Store */
 
     case ACPI_TYPE_INTEGER:
     case ACPI_TYPE_STRING:
     case ACPI_TYPE_BUFFER:
     case ACPI_TYPE_PACKAGE:
     case ACPI_TYPE_BUFFER_FIELD:
 
     /*
      * These types open a new scope, so we need the NS node in order to access
      * any children.
      */
     case ACPI_TYPE_DEVICE:
     case ACPI_TYPE_POWER:
     case ACPI_TYPE_PROCESSOR:
     case ACPI_TYPE_THERMAL:
     case ACPI_TYPE_LOCAL_SCOPE:
 
         /*
          * The new alias has the type ALIAS and points to the original
          * NS node, not the object itself.
          */
         AliasNode->Type = ACPI_TYPE_LOCAL_ALIAS;
         AliasNode->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode);
         break;
 
     case ACPI_TYPE_METHOD:
 
         /*
          * Control method aliases need to be differentiated
          */
         AliasNode->Type = ACPI_TYPE_LOCAL_METHOD_ALIAS;
         AliasNode->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode);
         break;
 
     default:
 
         /* Attach the original source object to the new Alias Node */
 
         /*
          * The new alias assumes the type of the target, and it points
          * to the same object.  The reference count of the object has an
          * additional reference to prevent deletion out from under either the
          * target node or the alias Node
          */
         Status = AcpiNsAttachObject (AliasNode,
                     AcpiNsGetAttachedObject (TargetNode), TargetNode->Type);
         break;
     }
 
     /* Since both operands are Nodes, we don't need to delete them */
 
     return_ACPI_STATUS (Status);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiExCreateEvent
  *
  * PARAMETERS:  WalkState           - Current state
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Create a new event object
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiExCreateEvent (
     ACPI_WALK_STATE         *WalkState)
 {
     ACPI_STATUS             Status;
     ACPI_OPERAND_OBJECT     *ObjDesc;
 
 
     ACPI_FUNCTION_TRACE (ExCreateEvent);
 
 
     ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_EVENT);
     if (!ObjDesc)
     {
         Status = AE_NO_MEMORY;
         goto Cleanup;
     }
 
     /*
      * Create the actual OS semaphore, with zero initial units -- meaning
      * that the event is created in an unsignalled state
      */
     Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT, 0,
                 &ObjDesc->Event.OsSemaphore);
     if (ACPI_FAILURE (Status))
     {
         goto Cleanup;
     }
 
     /* Attach object to the Node */
 
     Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) WalkState->Operands[0],
                 ObjDesc, ACPI_TYPE_EVENT);
 
 Cleanup:
     /*
      * Remove local reference to the object (on error, will cause deletion
      * of both object and semaphore if present.)
      */
     AcpiUtRemoveReference (ObjDesc);
     return_ACPI_STATUS (Status);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiExCreateMutex
  *
  * PARAMETERS:  WalkState           - Current state
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Create a new mutex object
  *
  *              Mutex (Name[0], SyncLevel[1])
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiExCreateMutex (
     ACPI_WALK_STATE         *WalkState)
 {
     ACPI_STATUS             Status = AE_OK;
     ACPI_OPERAND_OBJECT     *ObjDesc;
 
 
     ACPI_FUNCTION_TRACE_PTR (ExCreateMutex, ACPI_WALK_OPERANDS);
 
 
     /* Create the new mutex object */
 
     ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_MUTEX);
     if (!ObjDesc)
     {
         Status = AE_NO_MEMORY;
         goto Cleanup;
     }
 
     /* Create the actual OS Mutex */
 
     Status = AcpiOsCreateMutex (&ObjDesc->Mutex.OsMutex);
     if (ACPI_FAILURE (Status))
     {
         goto Cleanup;
     }
 
     /* Init object and attach to NS node */
 
     ObjDesc->Mutex.SyncLevel = (UINT8) WalkState->Operands[1]->Integer.Value;
     ObjDesc->Mutex.Node = (ACPI_NAMESPACE_NODE *) WalkState->Operands[0];
 
     Status = AcpiNsAttachObject (ObjDesc->Mutex.Node, ObjDesc, ACPI_TYPE_MUTEX);
 
 
 Cleanup:
     /*
      * Remove local reference to the object (on error, will cause deletion
      * of both object and semaphore if present.)
      */
     AcpiUtRemoveReference (ObjDesc);
     return_ACPI_STATUS (Status);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiExCreateRegion
  *
  * PARAMETERS:  AmlStart            - Pointer to the region declaration AML
  *              AmlLength           - Max length of the declaration AML
  *              RegionSpace         - SpaceID for the region
  *              WalkState           - Current state
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Create a new operation region object
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiExCreateRegion (
     UINT8                   *AmlStart,
     UINT32                  AmlLength,
     UINT8                   RegionSpace,
     ACPI_WALK_STATE         *WalkState)
 {
     ACPI_STATUS             Status;
     ACPI_OPERAND_OBJECT     *ObjDesc;
     ACPI_NAMESPACE_NODE     *Node;
     ACPI_OPERAND_OBJECT     *RegionObj2;
 
 
     ACPI_FUNCTION_TRACE (ExCreateRegion);
 
 
     /* Get the Namespace Node */
 
     Node = WalkState->Op->Common.Node;
 
     /*
      * If the region object is already attached to this node,
      * just return
      */
     if (AcpiNsGetAttachedObject (Node))
     {
         return_ACPI_STATUS (AE_OK);
     }
 
     /*
      * Space ID must be one of the predefined IDs, or in the user-defined
      * range
      */
     if ((RegionSpace >= ACPI_NUM_PREDEFINED_REGIONS) &&
         (RegionSpace < ACPI_USER_REGION_BEGIN))
     {
         ACPI_ERROR ((AE_INFO, "Invalid AddressSpace type %X", RegionSpace));
         return_ACPI_STATUS (AE_AML_INVALID_SPACE_ID);
     }
 
     ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "Region Type - %s (%X)\n",
         AcpiUtGetRegionName (RegionSpace), RegionSpace));
 
     /* Create the region descriptor */
 
     ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_REGION);
     if (!ObjDesc)
     {
         Status = AE_NO_MEMORY;
         goto Cleanup;
     }
 
     /*
      * Remember location in AML stream of address & length
      * operands since they need to be evaluated at run time.
      */
     RegionObj2 = ObjDesc->Common.NextObject;
     RegionObj2->Extra.AmlStart = AmlStart;
     RegionObj2->Extra.AmlLength = AmlLength;
 
     /* Init the region from the operands */
 
     ObjDesc->Region.SpaceId = RegionSpace;
     ObjDesc->Region.Address = 0;
     ObjDesc->Region.Length = 0;
     ObjDesc->Region.Node = Node;
 
     /* Install the new region object in the parent Node */
 
     Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_REGION);
 
 
 Cleanup:
 
     /* Remove local reference to the object */
 
     AcpiUtRemoveReference (ObjDesc);
     return_ACPI_STATUS (Status);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiExCreateProcessor
  *
  * PARAMETERS:  WalkState           - Current state
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Create a new processor object and populate the fields
  *
  *              Processor (Name[0], CpuID[1], PblockAddr[2], PblockLength[3])
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiExCreateProcessor (
     ACPI_WALK_STATE         *WalkState)
 {
     ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
     ACPI_OPERAND_OBJECT     *ObjDesc;
     ACPI_STATUS             Status;
 
 
     ACPI_FUNCTION_TRACE_PTR (ExCreateProcessor, WalkState);
 
 
     /* Create the processor object */
 
     ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_PROCESSOR);
     if (!ObjDesc)
     {
         return_ACPI_STATUS (AE_NO_MEMORY);
     }
 
     /* Initialize the processor object from the operands */
 
     ObjDesc->Processor.ProcId = (UINT8) Operand[1]->Integer.Value;
     ObjDesc->Processor.Length = (UINT8) Operand[3]->Integer.Value;
     ObjDesc->Processor.Address = (ACPI_IO_ADDRESS) Operand[2]->Integer.Value;
 
     /* Install the processor object in the parent Node */
 
     Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0],
                     ObjDesc, ACPI_TYPE_PROCESSOR);
 
     /* Remove local reference to the object */
 
     AcpiUtRemoveReference (ObjDesc);
     return_ACPI_STATUS (Status);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiExCreatePowerResource
  *
  * PARAMETERS:  WalkState           - Current state
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Create a new PowerResource object and populate the fields
  *
  *              PowerResource (Name[0], SystemLevel[1], ResourceOrder[2])
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiExCreatePowerResource (
     ACPI_WALK_STATE         *WalkState)
 {
     ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
     ACPI_STATUS             Status;
     ACPI_OPERAND_OBJECT     *ObjDesc;
 
 
     ACPI_FUNCTION_TRACE_PTR (ExCreatePowerResource, WalkState);
 
 
     /* Create the power resource object */
 
     ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_POWER);
     if (!ObjDesc)
     {
         return_ACPI_STATUS (AE_NO_MEMORY);
     }
 
     /* Initialize the power object from the operands */
 
     ObjDesc->PowerResource.SystemLevel = (UINT8) Operand[1]->Integer.Value;
     ObjDesc->PowerResource.ResourceOrder = (UINT16) Operand[2]->Integer.Value;
 
     /* Install the  power resource object in the parent Node */
 
     Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0],
                     ObjDesc, ACPI_TYPE_POWER);
 
     /* Remove local reference to the object */
 
     AcpiUtRemoveReference (ObjDesc);
     return_ACPI_STATUS (Status);
 }
 #endif
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiExCreateMethod
  *
  * PARAMETERS:  AmlStart        - First byte of the method's AML
  *              AmlLength       - AML byte count for this method
  *              WalkState       - Current state
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Create a new method object
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiExCreateMethod (
     UINT8                   *AmlStart,
     UINT32                  AmlLength,
     ACPI_WALK_STATE         *WalkState)
 {
     ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
     ACPI_OPERAND_OBJECT     *ObjDesc;
     ACPI_STATUS             Status;
     UINT8                   MethodFlags;
 
 
     ACPI_FUNCTION_TRACE_PTR (ExCreateMethod, WalkState);
 
 
     /* Create a new method object */
 
     ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_METHOD);
     if (!ObjDesc)
     {
        Status = AE_NO_MEMORY;
        goto Exit;
     }
 
     /* Save the method's AML pointer and length  */
 
     ObjDesc->Method.AmlStart = AmlStart;
     ObjDesc->Method.AmlLength = AmlLength;
 
     /*
      * Disassemble the method flags. Split off the Arg Count
      * for efficiency
      */
     MethodFlags = (UINT8) Operand[1]->Integer.Value;
 
     ObjDesc->Method.MethodFlags = (UINT8) (MethodFlags & ~AML_METHOD_ARG_COUNT);
     ObjDesc->Method.ParamCount = (UINT8) (MethodFlags & AML_METHOD_ARG_COUNT);
 
     /*
      * Get the SyncLevel. If method is serialized, a mutex will be
      * created for this method when it is parsed.
      */
     if (MethodFlags & AML_METHOD_SERIALIZED)
     {
         /*
          * ACPI 1.0: SyncLevel = 0
          * ACPI 2.0: SyncLevel = SyncLevel in method declaration
          */
         ObjDesc->Method.SyncLevel = (UINT8)
             ((MethodFlags & AML_METHOD_SYNC_LEVEL) >> 4);
     }
 
     /* Attach the new object to the method Node */
 
     Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0],
                     ObjDesc, ACPI_TYPE_METHOD);
 
     /* Remove local reference to the object */
 
     AcpiUtRemoveReference (ObjDesc);
 
 Exit:
     /* Remove a reference to the operand */
 
     AcpiUtRemoveReference (Operand[1]);
     return_ACPI_STATUS (Status);
 }