nsalloc.c revision 209746
167754Smsmith/******************************************************************************* 267754Smsmith * 367754Smsmith * Module Name: nsalloc - Namespace allocation and deletion utilities 467754Smsmith * 567754Smsmith ******************************************************************************/ 667754Smsmith 767754Smsmith/****************************************************************************** 867754Smsmith * 967754Smsmith * 1. Copyright Notice 1067754Smsmith * 11202771Sjkim * Some or all of this work - Copyright (c) 1999 - 2010, Intel Corp. 1270243Smsmith * All rights reserved. 1367754Smsmith * 1467754Smsmith * 2. License 1567754Smsmith * 1667754Smsmith * 2.1. This is your license from Intel Corp. under its intellectual property 1767754Smsmith * rights. You may have additional license terms from the party that provided 1867754Smsmith * you this software, covering your right to use that party's intellectual 1967754Smsmith * property rights. 2067754Smsmith * 2167754Smsmith * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 2267754Smsmith * copy of the source code appearing in this file ("Covered Code") an 2367754Smsmith * irrevocable, perpetual, worldwide license under Intel's copyrights in the 2467754Smsmith * base code distributed originally by Intel ("Original Intel Code") to copy, 2567754Smsmith * make derivatives, distribute, use and display any portion of the Covered 2667754Smsmith * Code in any form, with the right to sublicense such rights; and 2767754Smsmith * 2867754Smsmith * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 2967754Smsmith * license (with the right to sublicense), under only those claims of Intel 3067754Smsmith * patents that are infringed by the Original Intel Code, to make, use, sell, 3167754Smsmith * offer to sell, and import the Covered Code and derivative works thereof 3267754Smsmith * solely to the minimum extent necessary to exercise the above copyright 3367754Smsmith * license, and in no event shall the patent license extend to any additions 3467754Smsmith * to or modifications of the Original Intel Code. No other license or right 3567754Smsmith * is granted directly or by implication, estoppel or otherwise; 3667754Smsmith * 3767754Smsmith * The above copyright and patent license is granted only if the following 3867754Smsmith * conditions are met: 3967754Smsmith * 4067754Smsmith * 3. Conditions 4167754Smsmith * 4267754Smsmith * 3.1. Redistribution of Source with Rights to Further Distribute Source. 4367754Smsmith * Redistribution of source code of any substantial portion of the Covered 4467754Smsmith * Code or modification with rights to further distribute source must include 4567754Smsmith * the above Copyright Notice, the above License, this list of Conditions, 4667754Smsmith * and the following Disclaimer and Export Compliance provision. In addition, 4767754Smsmith * Licensee must cause all Covered Code to which Licensee contributes to 4867754Smsmith * contain a file documenting the changes Licensee made to create that Covered 4967754Smsmith * Code and the date of any change. Licensee must include in that file the 5067754Smsmith * documentation of any changes made by any predecessor Licensee. Licensee 5167754Smsmith * must include a prominent statement that the modification is derived, 5267754Smsmith * directly or indirectly, from Original Intel Code. 5367754Smsmith * 5467754Smsmith * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 5567754Smsmith * Redistribution of source code of any substantial portion of the Covered 5667754Smsmith * Code or modification without rights to further distribute source must 5767754Smsmith * include the following Disclaimer and Export Compliance provision in the 5867754Smsmith * documentation and/or other materials provided with distribution. In 5967754Smsmith * addition, Licensee may not authorize further sublicense of source of any 6067754Smsmith * portion of the Covered Code, and must include terms to the effect that the 6167754Smsmith * license from Licensee to its licensee is limited to the intellectual 6267754Smsmith * property embodied in the software Licensee provides to its licensee, and 6367754Smsmith * not to intellectual property embodied in modifications its licensee may 6467754Smsmith * make. 6567754Smsmith * 6667754Smsmith * 3.3. Redistribution of Executable. Redistribution in executable form of any 6767754Smsmith * substantial portion of the Covered Code or modification must reproduce the 6867754Smsmith * above Copyright Notice, and the following Disclaimer and Export Compliance 6967754Smsmith * provision in the documentation and/or other materials provided with the 7067754Smsmith * distribution. 7167754Smsmith * 7267754Smsmith * 3.4. Intel retains all right, title, and interest in and to the Original 7367754Smsmith * Intel Code. 7467754Smsmith * 7567754Smsmith * 3.5. Neither the name Intel nor any other trademark owned or controlled by 7667754Smsmith * Intel shall be used in advertising or otherwise to promote the sale, use or 7767754Smsmith * other dealings in products derived from or relating to the Covered Code 7867754Smsmith * without prior written authorization from Intel. 7967754Smsmith * 8067754Smsmith * 4. Disclaimer and Export Compliance 8167754Smsmith * 8267754Smsmith * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 8367754Smsmith * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 8467754Smsmith * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 8567754Smsmith * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 8667754Smsmith * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 8767754Smsmith * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 8867754Smsmith * PARTICULAR PURPOSE. 8967754Smsmith * 9067754Smsmith * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 9167754Smsmith * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 9267754Smsmith * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 9367754Smsmith * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 9467754Smsmith * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 9567754Smsmith * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 9667754Smsmith * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 9767754Smsmith * LIMITED REMEDY. 9867754Smsmith * 9967754Smsmith * 4.3. Licensee shall not export, either directly or indirectly, any of this 10067754Smsmith * software or system incorporating such software without first obtaining any 10167754Smsmith * required license or other approval from the U. S. Department of Commerce or 10267754Smsmith * any other agency or department of the United States Government. In the 10367754Smsmith * event Licensee exports any such software from the United States or 10467754Smsmith * re-exports any such software from a foreign destination, Licensee shall 10567754Smsmith * ensure that the distribution and export/re-export of the software is in 10667754Smsmith * compliance with all laws, regulations, orders, or other restrictions of the 10767754Smsmith * U.S. Export Administration Regulations. Licensee agrees that neither it nor 10867754Smsmith * any of its subsidiaries will export/re-export any technical data, process, 10967754Smsmith * software, or service, directly or indirectly, to any country for which the 11067754Smsmith * United States government or any agency thereof requires an export license, 11167754Smsmith * other governmental approval, or letter of assurance, without first obtaining 11267754Smsmith * such license, approval or letter. 11367754Smsmith * 11467754Smsmith *****************************************************************************/ 11567754Smsmith 11667754Smsmith 11767754Smsmith#define __NSALLOC_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> 12267754Smsmith 12367754Smsmith 12477424Smsmith#define _COMPONENT ACPI_NAMESPACE 12591116Smsmith ACPI_MODULE_NAME ("nsalloc") 12667754Smsmith 12767754Smsmith 12867754Smsmith/******************************************************************************* 12967754Smsmith * 13067754Smsmith * FUNCTION: AcpiNsCreateNode 13167754Smsmith * 132151937Sjkim * PARAMETERS: Name - Name of the new node (4 char ACPI name) 13367754Smsmith * 134151937Sjkim * RETURN: New namespace node (Null on failure) 13567754Smsmith * 13683174Smsmith * DESCRIPTION: Create a namespace node 13767754Smsmith * 13867754Smsmith ******************************************************************************/ 13967754Smsmith 14067754SmsmithACPI_NAMESPACE_NODE * 14167754SmsmithAcpiNsCreateNode ( 14284491Smsmith UINT32 Name) 14367754Smsmith{ 14467754Smsmith ACPI_NAMESPACE_NODE *Node; 145167802Sjkim#ifdef ACPI_DBG_TRACK_ALLOCATIONS 146167802Sjkim UINT32 Temp; 147167802Sjkim#endif 14867754Smsmith 14983174Smsmith 150167802Sjkim ACPI_FUNCTION_TRACE (NsCreateNode); 15167754Smsmith 15267754Smsmith 153167802Sjkim Node = AcpiOsAcquireObject (AcpiGbl_NamespaceCache); 15467754Smsmith if (!Node) 15567754Smsmith { 15667754Smsmith return_PTR (NULL); 15767754Smsmith } 15867754Smsmith 159151937Sjkim ACPI_MEM_TRACKING (AcpiGbl_NsNodeList->TotalAllocated++); 16067754Smsmith 161167802Sjkim#ifdef ACPI_DBG_TRACK_ALLOCATIONS 162193267Sjkim Temp = AcpiGbl_NsNodeList->TotalAllocated - 163193267Sjkim AcpiGbl_NsNodeList->TotalFreed; 164167802Sjkim if (Temp > AcpiGbl_NsNodeList->MaxOccupied) 165167802Sjkim { 166167802Sjkim AcpiGbl_NsNodeList->MaxOccupied = Temp; 167167802Sjkim } 168167802Sjkim#endif 169167802Sjkim 170167802Sjkim Node->Name.Integer = Name; 17191116Smsmith ACPI_SET_DESCRIPTOR_TYPE (Node, ACPI_DESC_TYPE_NAMED); 17267754Smsmith return_PTR (Node); 17367754Smsmith} 17467754Smsmith 17567754Smsmith 17667754Smsmith/******************************************************************************* 17767754Smsmith * 17867754Smsmith * FUNCTION: AcpiNsDeleteNode 17967754Smsmith * 18083174Smsmith * PARAMETERS: Node - Node to be deleted 18167754Smsmith * 18267754Smsmith * RETURN: None 18367754Smsmith * 184197104Sjkim * DESCRIPTION: Delete a namespace node. All node deletions must come through 185197104Sjkim * here. Detaches any attached objects, including any attached 186197104Sjkim * data. If a handler is associated with attached data, it is 187197104Sjkim * invoked before the node is deleted. 18867754Smsmith * 18967754Smsmith ******************************************************************************/ 19067754Smsmith 19167754Smsmithvoid 19267754SmsmithAcpiNsDeleteNode ( 19367754Smsmith ACPI_NAMESPACE_NODE *Node) 19467754Smsmith{ 195197104Sjkim ACPI_OPERAND_OBJECT *ObjDesc; 196197104Sjkim 197197104Sjkim 198197104Sjkim ACPI_FUNCTION_NAME (NsDeleteNode); 199197104Sjkim 200197104Sjkim 201197104Sjkim /* Detach an object if there is one */ 202197104Sjkim 203197104Sjkim AcpiNsDetachObject (Node); 204197104Sjkim 205197104Sjkim /* 206197104Sjkim * Delete an attached data object if present (an object that was created 207197104Sjkim * and attached via AcpiAttachData). Note: After any normal object is 208197104Sjkim * detached above, the only possible remaining object is a data object. 209197104Sjkim */ 210197104Sjkim ObjDesc = Node->Object; 211197104Sjkim if (ObjDesc && 212197104Sjkim (ObjDesc->Common.Type == ACPI_TYPE_LOCAL_DATA)) 213197104Sjkim { 214197104Sjkim /* Invoke the attached data deletion handler if present */ 215197104Sjkim 216197104Sjkim if (ObjDesc->Data.Handler) 217197104Sjkim { 218197104Sjkim ObjDesc->Data.Handler (Node, ObjDesc->Data.Pointer); 219197104Sjkim } 220197104Sjkim 221197104Sjkim AcpiUtRemoveReference (ObjDesc); 222197104Sjkim } 223197104Sjkim 224197104Sjkim /* Now we can delete the node */ 225197104Sjkim 226197104Sjkim (void) AcpiOsReleaseObject (AcpiGbl_NamespaceCache, Node); 227197104Sjkim 228197104Sjkim ACPI_MEM_TRACKING (AcpiGbl_NsNodeList->TotalFreed++); 229197104Sjkim ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Node %p, Remaining %X\n", 230197104Sjkim Node, AcpiGbl_CurrentNodeCount)); 231197104Sjkim} 232197104Sjkim 233197104Sjkim 234197104Sjkim/******************************************************************************* 235197104Sjkim * 236197104Sjkim * FUNCTION: AcpiNsRemoveNode 237197104Sjkim * 238197104Sjkim * PARAMETERS: Node - Node to be removed/deleted 239197104Sjkim * 240197104Sjkim * RETURN: None 241197104Sjkim * 242197104Sjkim * DESCRIPTION: Remove (unlink) and delete a namespace node 243197104Sjkim * 244197104Sjkim ******************************************************************************/ 245197104Sjkim 246197104Sjkimvoid 247197104SjkimAcpiNsRemoveNode ( 248197104Sjkim ACPI_NAMESPACE_NODE *Node) 249197104Sjkim{ 25067754Smsmith ACPI_NAMESPACE_NODE *ParentNode; 25167754Smsmith ACPI_NAMESPACE_NODE *PrevNode; 25267754Smsmith ACPI_NAMESPACE_NODE *NextNode; 25367754Smsmith 25467754Smsmith 255197104Sjkim ACPI_FUNCTION_TRACE_PTR (NsRemoveNode, Node); 25667754Smsmith 25783174Smsmith 258209746Sjkim ParentNode = Node->Parent; 25967754Smsmith 26067754Smsmith PrevNode = NULL; 26167754Smsmith NextNode = ParentNode->Child; 26267754Smsmith 263115351Snjl /* Find the node that is the previous peer in the parent's child list */ 264115351Snjl 26567754Smsmith while (NextNode != Node) 26667754Smsmith { 26767754Smsmith PrevNode = NextNode; 268209746Sjkim NextNode = NextNode->Peer; 26967754Smsmith } 27067754Smsmith 27167754Smsmith if (PrevNode) 27267754Smsmith { 273115351Snjl /* Node is not first child, unlink it */ 274115351Snjl 275209746Sjkim PrevNode->Peer = Node->Peer; 27667754Smsmith } 27767754Smsmith else 27867754Smsmith { 279209746Sjkim /* 280209746Sjkim * Node is first child (has no previous peer). 281209746Sjkim * Link peer list to parent 282209746Sjkim */ 283209746Sjkim ParentNode->Child = Node->Peer; 28467754Smsmith } 28567754Smsmith 286197104Sjkim /* Delete the node and any attached objects */ 28767754Smsmith 288197104Sjkim AcpiNsDeleteNode (Node); 28967754Smsmith return_VOID; 29067754Smsmith} 29167754Smsmith 29267754Smsmith 29367754Smsmith/******************************************************************************* 29467754Smsmith * 29567754Smsmith * FUNCTION: AcpiNsInstallNode 29667754Smsmith * 29767754Smsmith * PARAMETERS: WalkState - Current state of the walk 29867754Smsmith * ParentNode - The parent of the new Node 29983174Smsmith * Node - The new Node to install 30067754Smsmith * Type - ACPI object type of the new Node 30167754Smsmith * 30267754Smsmith * RETURN: None 30367754Smsmith * 30487031Smsmith * DESCRIPTION: Initialize a new namespace node and install it amongst 30587031Smsmith * its peers. 30667754Smsmith * 307151937Sjkim * Note: Current namespace lookup is linear search. This appears 308151937Sjkim * to be sufficient as namespace searches consume only a small 309151937Sjkim * fraction of the execution time of the ACPI subsystem. 31087031Smsmith * 31167754Smsmith ******************************************************************************/ 31267754Smsmith 31367754Smsmithvoid 31467754SmsmithAcpiNsInstallNode ( 31567754Smsmith ACPI_WALK_STATE *WalkState, 31667754Smsmith ACPI_NAMESPACE_NODE *ParentNode, /* Parent */ 31783174Smsmith ACPI_NAMESPACE_NODE *Node, /* New Child*/ 31891116Smsmith ACPI_OBJECT_TYPE Type) 31967754Smsmith{ 320151937Sjkim ACPI_OWNER_ID OwnerId = 0; 32167754Smsmith ACPI_NAMESPACE_NODE *ChildNode; 32267754Smsmith 32367754Smsmith 324167802Sjkim ACPI_FUNCTION_TRACE (NsInstallNode); 32567754Smsmith 32667754Smsmith 32767754Smsmith if (WalkState) 32867754Smsmith { 329209746Sjkim /* 330209746Sjkim * Get the owner ID from the Walk state. The owner ID is used to 331209746Sjkim * track table deletion and deletion of objects created by methods. 332209746Sjkim */ 33367754Smsmith OwnerId = WalkState->OwnerId; 334209746Sjkim 335209746Sjkim if ((WalkState->MethodDesc) && 336209746Sjkim (ParentNode != WalkState->MethodNode)) 337209746Sjkim { 338209746Sjkim /* 339209746Sjkim * A method is creating a new node that is not a child of the 340209746Sjkim * method (it is non-local). Mark the executing method as having 341209746Sjkim * modified the namespace. This is used for cleanup when the 342209746Sjkim * method exits. 343209746Sjkim */ 344209746Sjkim WalkState->MethodDesc->Method.Flags |= AOPOBJ_MODIFIED_NAMESPACE; 345209746Sjkim } 34667754Smsmith } 34767754Smsmith 34887031Smsmith /* Link the new entry into the parent and existing children */ 34967754Smsmith 350209746Sjkim Node->Peer = NULL; 351209746Sjkim Node->Parent = ParentNode; 35267754Smsmith ChildNode = ParentNode->Child; 353209746Sjkim 35467754Smsmith if (!ChildNode) 35567754Smsmith { 35667754Smsmith ParentNode->Child = Node; 35767754Smsmith } 35867754Smsmith else 35967754Smsmith { 360209746Sjkim /* Add node to the end of the peer list */ 361209746Sjkim 362209746Sjkim while (ChildNode->Peer) 36367754Smsmith { 36467754Smsmith ChildNode = ChildNode->Peer; 36567754Smsmith } 36667754Smsmith 36767754Smsmith ChildNode->Peer = Node; 36867754Smsmith } 36967754Smsmith 37067754Smsmith /* Init the new entry */ 37167754Smsmith 372107325Siwasaki Node->OwnerId = OwnerId; 373107325Siwasaki Node->Type = (UINT8) Type; 37467754Smsmith 375129684Snjl ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, 376127175Snjl "%4.4s (%s) [Node %p Owner %X] added to %4.4s (%s) [Node %p]\n", 377127175Snjl AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Node->Type), Node, OwnerId, 378123315Snjl AcpiUtGetNodeName (ParentNode), AcpiUtGetTypeName (ParentNode->Type), 379127175Snjl ParentNode)); 38067754Smsmith 38167754Smsmith return_VOID; 38267754Smsmith} 38367754Smsmith 38467754Smsmith 38567754Smsmith/******************************************************************************* 38667754Smsmith * 38767754Smsmith * FUNCTION: AcpiNsDeleteChildren 38867754Smsmith * 38967754Smsmith * PARAMETERS: ParentNode - Delete this objects children 39067754Smsmith * 39167754Smsmith * RETURN: None. 39267754Smsmith * 39391116Smsmith * DESCRIPTION: Delete all children of the parent object. In other words, 39491116Smsmith * deletes a "scope". 39567754Smsmith * 39667754Smsmith ******************************************************************************/ 39767754Smsmith 39867754Smsmithvoid 39967754SmsmithAcpiNsDeleteChildren ( 40067754Smsmith ACPI_NAMESPACE_NODE *ParentNode) 40167754Smsmith{ 40267754Smsmith ACPI_NAMESPACE_NODE *NextNode; 403209746Sjkim ACPI_NAMESPACE_NODE *NodeToDelete; 40467754Smsmith 40567754Smsmith 406167802Sjkim ACPI_FUNCTION_TRACE_PTR (NsDeleteChildren, ParentNode); 40767754Smsmith 40867754Smsmith 40967754Smsmith if (!ParentNode) 41067754Smsmith { 41167754Smsmith return_VOID; 41267754Smsmith } 41367754Smsmith 414193267Sjkim /* Deallocate all children at this level */ 415193267Sjkim 416209746Sjkim NextNode = ParentNode->Child; 417209746Sjkim while (NextNode) 41867754Smsmith { 41967754Smsmith /* Grandchildren should have all been deleted already */ 42067754Smsmith 421209746Sjkim if (NextNode->Child) 42267754Smsmith { 423167802Sjkim ACPI_ERROR ((AE_INFO, "Found a grandchild! P=%p C=%p", 424209746Sjkim ParentNode, NextNode)); 42567754Smsmith } 42667754Smsmith 427197104Sjkim /* 428197104Sjkim * Delete this child node and move on to the next child in the list. 429197104Sjkim * No need to unlink the node since we are deleting the entire branch. 430197104Sjkim */ 431209746Sjkim NodeToDelete = NextNode; 432209746Sjkim NextNode = NextNode->Peer; 433209746Sjkim AcpiNsDeleteNode (NodeToDelete); 434209746Sjkim }; 43567754Smsmith 43667754Smsmith /* Clear the parent's child pointer */ 43767754Smsmith 43867754Smsmith ParentNode->Child = NULL; 43967754Smsmith return_VOID; 44067754Smsmith} 44167754Smsmith 44267754Smsmith 44367754Smsmith/******************************************************************************* 44467754Smsmith * 44567754Smsmith * FUNCTION: AcpiNsDeleteNamespaceSubtree 44667754Smsmith * 44783174Smsmith * PARAMETERS: ParentNode - Root of the subtree to be deleted 44867754Smsmith * 44967754Smsmith * RETURN: None. 45067754Smsmith * 45167754Smsmith * DESCRIPTION: Delete a subtree of the namespace. This includes all objects 45291116Smsmith * stored within the subtree. 45367754Smsmith * 45467754Smsmith ******************************************************************************/ 45567754Smsmith 45699679Siwasakivoid 45767754SmsmithAcpiNsDeleteNamespaceSubtree ( 45867754Smsmith ACPI_NAMESPACE_NODE *ParentNode) 45967754Smsmith{ 46084491Smsmith ACPI_NAMESPACE_NODE *ChildNode = NULL; 46184491Smsmith UINT32 Level = 1; 46267754Smsmith 46367754Smsmith 464167802Sjkim ACPI_FUNCTION_TRACE (NsDeleteNamespaceSubtree); 46567754Smsmith 46667754Smsmith 46767754Smsmith if (!ParentNode) 46867754Smsmith { 46999679Siwasaki return_VOID; 47067754Smsmith } 47167754Smsmith 47267754Smsmith /* 47367754Smsmith * Traverse the tree of objects until we bubble back up 47467754Smsmith * to where we started. 47567754Smsmith */ 47667754Smsmith while (Level > 0) 47767754Smsmith { 47885756Smsmith /* Get the next node in this scope (NULL if none) */ 47985756Smsmith 480193267Sjkim ChildNode = AcpiNsGetNextNode (ParentNode, ChildNode); 48167754Smsmith if (ChildNode) 48267754Smsmith { 48385756Smsmith /* Found a child node - detach any attached object */ 48467754Smsmith 48585756Smsmith AcpiNsDetachObject (ChildNode); 48667754Smsmith 48785756Smsmith /* Check if this node has any children */ 48867754Smsmith 489193267Sjkim if (ChildNode->Child) 49067754Smsmith { 49167754Smsmith /* 49285756Smsmith * There is at least one child of this node, 49385756Smsmith * visit the node 49467754Smsmith */ 49567754Smsmith Level++; 496138287Smarks ParentNode = ChildNode; 497138287Smarks ChildNode = NULL; 49867754Smsmith } 49967754Smsmith } 50067754Smsmith else 50167754Smsmith { 50267754Smsmith /* 50385756Smsmith * No more children of this parent node. 50485756Smsmith * Move up to the grandparent. 50567754Smsmith */ 50667754Smsmith Level--; 50767754Smsmith 50867754Smsmith /* 50967754Smsmith * Now delete all of the children of this parent 51067754Smsmith * all at the same time. 51167754Smsmith */ 51267754Smsmith AcpiNsDeleteChildren (ParentNode); 51367754Smsmith 51485756Smsmith /* New "last child" is this parent node */ 51567754Smsmith 51667754Smsmith ChildNode = ParentNode; 51767754Smsmith 51885756Smsmith /* Move up the tree to the grandparent */ 51967754Smsmith 520209746Sjkim ParentNode = ParentNode->Parent; 52167754Smsmith } 52267754Smsmith } 52367754Smsmith 52499679Siwasaki return_VOID; 52567754Smsmith} 52667754Smsmith 52767754Smsmith 52867754Smsmith/******************************************************************************* 52967754Smsmith * 53067754Smsmith * FUNCTION: AcpiNsDeleteNamespaceByOwner 53167754Smsmith * 53283174Smsmith * PARAMETERS: OwnerId - All nodes with this owner will be deleted 53367754Smsmith * 53483174Smsmith * RETURN: Status 53567754Smsmith * 53667754Smsmith * DESCRIPTION: Delete entries within the namespace that are owned by a 53767754Smsmith * specific ID. Used to delete entire ACPI tables. All 53867754Smsmith * reference counts are updated. 53967754Smsmith * 540167802Sjkim * MUTEX: Locks namespace during deletion walk. 541167802Sjkim * 54267754Smsmith ******************************************************************************/ 54367754Smsmith 54499679Siwasakivoid 54567754SmsmithAcpiNsDeleteNamespaceByOwner ( 546151937Sjkim ACPI_OWNER_ID OwnerId) 54767754Smsmith{ 54867754Smsmith ACPI_NAMESPACE_NODE *ChildNode; 54991116Smsmith ACPI_NAMESPACE_NODE *DeletionNode; 550167802Sjkim ACPI_NAMESPACE_NODE *ParentNode; 55167754Smsmith UINT32 Level; 552167802Sjkim ACPI_STATUS Status; 55367754Smsmith 55467754Smsmith 555167802Sjkim ACPI_FUNCTION_TRACE_U32 (NsDeleteNamespaceByOwner, OwnerId); 55667754Smsmith 55767754Smsmith 558151937Sjkim if (OwnerId == 0) 559151937Sjkim { 560151937Sjkim return_VOID; 561151937Sjkim } 562151937Sjkim 563167802Sjkim /* Lock namespace for possible update */ 56467754Smsmith 565167802Sjkim Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 566167802Sjkim if (ACPI_FAILURE (Status)) 567167802Sjkim { 568167802Sjkim return_VOID; 569167802Sjkim } 570167802Sjkim 571167802Sjkim DeletionNode = NULL; 572167802Sjkim ParentNode = AcpiGbl_RootNode; 573167802Sjkim ChildNode = NULL; 574167802Sjkim Level = 1; 575167802Sjkim 57667754Smsmith /* 57785756Smsmith * Traverse the tree of nodes until we bubble back up 57867754Smsmith * to where we started. 57967754Smsmith */ 58067754Smsmith while (Level > 0) 58167754Smsmith { 58291116Smsmith /* 58391116Smsmith * Get the next child of this parent node. When ChildNode is NULL, 58491116Smsmith * the first child of the parent is returned 58591116Smsmith */ 586193267Sjkim ChildNode = AcpiNsGetNextNode (ParentNode, ChildNode); 58785756Smsmith 58891116Smsmith if (DeletionNode) 58991116Smsmith { 590167802Sjkim AcpiNsDeleteChildren (DeletionNode); 591197104Sjkim AcpiNsRemoveNode (DeletionNode); 59291116Smsmith DeletionNode = NULL; 59391116Smsmith } 59491116Smsmith 59567754Smsmith if (ChildNode) 59667754Smsmith { 59767754Smsmith if (ChildNode->OwnerId == OwnerId) 59867754Smsmith { 59991116Smsmith /* Found a matching child node - detach any attached object */ 60085756Smsmith 60185756Smsmith AcpiNsDetachObject (ChildNode); 60267754Smsmith } 60367754Smsmith 60485756Smsmith /* Check if this node has any children */ 60567754Smsmith 606193267Sjkim if (ChildNode->Child) 60767754Smsmith { 60867754Smsmith /* 60985756Smsmith * There is at least one child of this node, 61085756Smsmith * visit the node 61167754Smsmith */ 61267754Smsmith Level++; 613138287Smarks ParentNode = ChildNode; 614138287Smarks ChildNode = NULL; 61567754Smsmith } 61667754Smsmith else if (ChildNode->OwnerId == OwnerId) 61767754Smsmith { 61891116Smsmith DeletionNode = ChildNode; 61967754Smsmith } 62067754Smsmith } 62167754Smsmith else 62267754Smsmith { 62367754Smsmith /* 62485756Smsmith * No more children of this parent node. 62585756Smsmith * Move up to the grandparent. 62667754Smsmith */ 62767754Smsmith Level--; 62867754Smsmith if (Level != 0) 62967754Smsmith { 63067754Smsmith if (ParentNode->OwnerId == OwnerId) 63167754Smsmith { 63291116Smsmith DeletionNode = ParentNode; 63367754Smsmith } 63467754Smsmith } 63567754Smsmith 63685756Smsmith /* New "last child" is this parent node */ 63767754Smsmith 63867754Smsmith ChildNode = ParentNode; 63967754Smsmith 64085756Smsmith /* Move up the tree to the grandparent */ 64167754Smsmith 642209746Sjkim ParentNode = ParentNode->Parent; 64367754Smsmith } 64467754Smsmith } 64567754Smsmith 646167802Sjkim (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 64799679Siwasaki return_VOID; 64867754Smsmith} 64967754Smsmith 65067754Smsmith 651