nsalloc.c revision 80062
167754Smsmith/******************************************************************************* 267754Smsmith * 367754Smsmith * Module Name: nsalloc - Namespace allocation and deletion utilities 480062Smsmith * $Revision: 51 $ 567754Smsmith * 667754Smsmith ******************************************************************************/ 767754Smsmith 867754Smsmith/****************************************************************************** 967754Smsmith * 1067754Smsmith * 1. Copyright Notice 1167754Smsmith * 1271867Smsmith * Some or all of this work - Copyright (c) 1999, 2000, 2001, Intel Corp. 1370243Smsmith * All rights reserved. 1467754Smsmith * 1567754Smsmith * 2. License 1667754Smsmith * 1767754Smsmith * 2.1. This is your license from Intel Corp. under its intellectual property 1867754Smsmith * rights. You may have additional license terms from the party that provided 1967754Smsmith * you this software, covering your right to use that party's intellectual 2067754Smsmith * property rights. 2167754Smsmith * 2267754Smsmith * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 2367754Smsmith * copy of the source code appearing in this file ("Covered Code") an 2467754Smsmith * irrevocable, perpetual, worldwide license under Intel's copyrights in the 2567754Smsmith * base code distributed originally by Intel ("Original Intel Code") to copy, 2667754Smsmith * make derivatives, distribute, use and display any portion of the Covered 2767754Smsmith * Code in any form, with the right to sublicense such rights; and 2867754Smsmith * 2967754Smsmith * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 3067754Smsmith * license (with the right to sublicense), under only those claims of Intel 3167754Smsmith * patents that are infringed by the Original Intel Code, to make, use, sell, 3267754Smsmith * offer to sell, and import the Covered Code and derivative works thereof 3367754Smsmith * solely to the minimum extent necessary to exercise the above copyright 3467754Smsmith * license, and in no event shall the patent license extend to any additions 3567754Smsmith * to or modifications of the Original Intel Code. No other license or right 3667754Smsmith * is granted directly or by implication, estoppel or otherwise; 3767754Smsmith * 3867754Smsmith * The above copyright and patent license is granted only if the following 3967754Smsmith * conditions are met: 4067754Smsmith * 4167754Smsmith * 3. Conditions 4267754Smsmith * 4367754Smsmith * 3.1. Redistribution of Source with Rights to Further Distribute Source. 4467754Smsmith * Redistribution of source code of any substantial portion of the Covered 4567754Smsmith * Code or modification with rights to further distribute source must include 4667754Smsmith * the above Copyright Notice, the above License, this list of Conditions, 4767754Smsmith * and the following Disclaimer and Export Compliance provision. In addition, 4867754Smsmith * Licensee must cause all Covered Code to which Licensee contributes to 4967754Smsmith * contain a file documenting the changes Licensee made to create that Covered 5067754Smsmith * Code and the date of any change. Licensee must include in that file the 5167754Smsmith * documentation of any changes made by any predecessor Licensee. Licensee 5267754Smsmith * must include a prominent statement that the modification is derived, 5367754Smsmith * directly or indirectly, from Original Intel Code. 5467754Smsmith * 5567754Smsmith * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 5667754Smsmith * Redistribution of source code of any substantial portion of the Covered 5767754Smsmith * Code or modification without rights to further distribute source must 5867754Smsmith * include the following Disclaimer and Export Compliance provision in the 5967754Smsmith * documentation and/or other materials provided with distribution. In 6067754Smsmith * addition, Licensee may not authorize further sublicense of source of any 6167754Smsmith * portion of the Covered Code, and must include terms to the effect that the 6267754Smsmith * license from Licensee to its licensee is limited to the intellectual 6367754Smsmith * property embodied in the software Licensee provides to its licensee, and 6467754Smsmith * not to intellectual property embodied in modifications its licensee may 6567754Smsmith * make. 6667754Smsmith * 6767754Smsmith * 3.3. Redistribution of Executable. Redistribution in executable form of any 6867754Smsmith * substantial portion of the Covered Code or modification must reproduce the 6967754Smsmith * above Copyright Notice, and the following Disclaimer and Export Compliance 7067754Smsmith * provision in the documentation and/or other materials provided with the 7167754Smsmith * distribution. 7267754Smsmith * 7367754Smsmith * 3.4. Intel retains all right, title, and interest in and to the Original 7467754Smsmith * Intel Code. 7567754Smsmith * 7667754Smsmith * 3.5. Neither the name Intel nor any other trademark owned or controlled by 7767754Smsmith * Intel shall be used in advertising or otherwise to promote the sale, use or 7867754Smsmith * other dealings in products derived from or relating to the Covered Code 7967754Smsmith * without prior written authorization from Intel. 8067754Smsmith * 8167754Smsmith * 4. Disclaimer and Export Compliance 8267754Smsmith * 8367754Smsmith * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 8467754Smsmith * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 8567754Smsmith * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 8667754Smsmith * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 8767754Smsmith * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 8867754Smsmith * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 8967754Smsmith * PARTICULAR PURPOSE. 9067754Smsmith * 9167754Smsmith * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 9267754Smsmith * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 9367754Smsmith * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 9467754Smsmith * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 9567754Smsmith * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 9667754Smsmith * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 9767754Smsmith * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 9867754Smsmith * LIMITED REMEDY. 9967754Smsmith * 10067754Smsmith * 4.3. Licensee shall not export, either directly or indirectly, any of this 10167754Smsmith * software or system incorporating such software without first obtaining any 10267754Smsmith * required license or other approval from the U. S. Department of Commerce or 10367754Smsmith * any other agency or department of the United States Government. In the 10467754Smsmith * event Licensee exports any such software from the United States or 10567754Smsmith * re-exports any such software from a foreign destination, Licensee shall 10667754Smsmith * ensure that the distribution and export/re-export of the software is in 10767754Smsmith * compliance with all laws, regulations, orders, or other restrictions of the 10867754Smsmith * U.S. Export Administration Regulations. Licensee agrees that neither it nor 10967754Smsmith * any of its subsidiaries will export/re-export any technical data, process, 11067754Smsmith * software, or service, directly or indirectly, to any country for which the 11167754Smsmith * United States government or any agency thereof requires an export license, 11267754Smsmith * other governmental approval, or letter of assurance, without first obtaining 11367754Smsmith * such license, approval or letter. 11467754Smsmith * 11567754Smsmith *****************************************************************************/ 11667754Smsmith 11767754Smsmith 11867754Smsmith#define __NSALLOC_C__ 11967754Smsmith 12067754Smsmith#include "acpi.h" 12167754Smsmith#include "acnamesp.h" 12267754Smsmith#include "acinterp.h" 12367754Smsmith 12467754Smsmith 12577424Smsmith#define _COMPONENT ACPI_NAMESPACE 12667754Smsmith MODULE_NAME ("nsalloc") 12767754Smsmith 12867754Smsmith 12967754Smsmith/******************************************************************************* 13067754Smsmith * 13167754Smsmith * FUNCTION: AcpiNsCreateNode 13267754Smsmith * 13367754Smsmith * PARAMETERS: 13467754Smsmith * 13567754Smsmith * RETURN: None 13667754Smsmith * 13767754Smsmith * DESCRIPTION: 13867754Smsmith * 13967754Smsmith ******************************************************************************/ 14067754Smsmith 14167754SmsmithACPI_NAMESPACE_NODE * 14267754SmsmithAcpiNsCreateNode ( 14367754Smsmith UINT32 AcpiName) 14467754Smsmith{ 14567754Smsmith ACPI_NAMESPACE_NODE *Node; 14667754Smsmith 14767754Smsmith FUNCTION_TRACE ("NsCreateNode"); 14867754Smsmith 14967754Smsmith 15080062Smsmith Node = ACPI_MEM_CALLOCATE (sizeof (ACPI_NAMESPACE_NODE)); 15167754Smsmith if (!Node) 15267754Smsmith { 15367754Smsmith return_PTR (NULL); 15467754Smsmith } 15567754Smsmith 15667754Smsmith INCREMENT_NAME_TABLE_METRICS (sizeof (ACPI_NAMESPACE_NODE)); 15767754Smsmith 15867754Smsmith Node->DataType = ACPI_DESC_TYPE_NAMED; 15967754Smsmith Node->Name = AcpiName; 16067754Smsmith Node->ReferenceCount = 1; 16167754Smsmith 16267754Smsmith return_PTR (Node); 16367754Smsmith} 16467754Smsmith 16567754Smsmith 16667754Smsmith/******************************************************************************* 16767754Smsmith * 16867754Smsmith * FUNCTION: AcpiNsDeleteNode 16967754Smsmith * 17067754Smsmith * PARAMETERS: 17167754Smsmith * 17267754Smsmith * RETURN: None 17367754Smsmith * 17467754Smsmith * DESCRIPTION: 17567754Smsmith * 17667754Smsmith ******************************************************************************/ 17767754Smsmith 17867754Smsmithvoid 17967754SmsmithAcpiNsDeleteNode ( 18067754Smsmith ACPI_NAMESPACE_NODE *Node) 18167754Smsmith{ 18267754Smsmith ACPI_NAMESPACE_NODE *ParentNode; 18367754Smsmith ACPI_NAMESPACE_NODE *PrevNode; 18467754Smsmith ACPI_NAMESPACE_NODE *NextNode; 18567754Smsmith 18667754Smsmith 18767754Smsmith FUNCTION_TRACE_PTR ("NsDeleteNode", Node); 18867754Smsmith 18967754Smsmith ParentNode = AcpiNsGetParentObject (Node); 19067754Smsmith 19167754Smsmith PrevNode = NULL; 19267754Smsmith NextNode = ParentNode->Child; 19367754Smsmith 19467754Smsmith while (NextNode != Node) 19567754Smsmith { 19667754Smsmith PrevNode = NextNode; 19767754Smsmith NextNode = PrevNode->Peer; 19867754Smsmith } 19967754Smsmith 20067754Smsmith if (PrevNode) 20167754Smsmith { 20267754Smsmith PrevNode->Peer = NextNode->Peer; 20367754Smsmith if (NextNode->Flags & ANOBJ_END_OF_PEER_LIST) 20467754Smsmith { 20567754Smsmith PrevNode->Flags |= ANOBJ_END_OF_PEER_LIST; 20667754Smsmith } 20767754Smsmith } 20867754Smsmith else 20967754Smsmith { 21067754Smsmith ParentNode->Child = NextNode->Peer; 21167754Smsmith } 21267754Smsmith 21367754Smsmith 21467754Smsmith DECREMENT_NAME_TABLE_METRICS (sizeof (ACPI_NAMESPACE_NODE)); 21567754Smsmith 21667754Smsmith /* 21767754Smsmith * Detach an object if there is one 21867754Smsmith */ 21967754Smsmith 22067754Smsmith if (Node->Object) 22167754Smsmith { 22267754Smsmith AcpiNsDetachObject (Node); 22367754Smsmith } 22467754Smsmith 22580062Smsmith ACPI_MEM_FREE (Node); 22667754Smsmith return_VOID; 22767754Smsmith} 22867754Smsmith 22967754Smsmith 23067754Smsmith/******************************************************************************* 23167754Smsmith * 23267754Smsmith * FUNCTION: AcpiNsInstallNode 23367754Smsmith * 23467754Smsmith * PARAMETERS: WalkState - Current state of the walk 23567754Smsmith * ParentNode - The parent of the new Node 23667754Smsmith * Node - The new Node to install 23767754Smsmith * Type - ACPI object type of the new Node 23867754Smsmith * 23967754Smsmith * RETURN: None 24067754Smsmith * 24167754Smsmith * DESCRIPTION: Initialize a new entry within a namespace table. 24267754Smsmith * 24367754Smsmith ******************************************************************************/ 24467754Smsmith 24567754Smsmithvoid 24667754SmsmithAcpiNsInstallNode ( 24767754Smsmith ACPI_WALK_STATE *WalkState, 24867754Smsmith ACPI_NAMESPACE_NODE *ParentNode, /* Parent */ 24967754Smsmith ACPI_NAMESPACE_NODE *Node, /* New Child*/ 25077424Smsmith ACPI_OBJECT_TYPE8 Type) 25167754Smsmith{ 25267754Smsmith UINT16 OwnerId = TABLE_ID_DSDT; 25367754Smsmith ACPI_NAMESPACE_NODE *ChildNode; 25467754Smsmith 25567754Smsmith 25667754Smsmith FUNCTION_TRACE ("NsInstallNode"); 25767754Smsmith 25867754Smsmith 25967754Smsmith /* 26067754Smsmith * Get the owner ID from the Walk state 26167754Smsmith * The owner ID is used to track table deletion and 26267754Smsmith * deletion of objects created by methods 26367754Smsmith */ 26467754Smsmith if (WalkState) 26567754Smsmith { 26667754Smsmith OwnerId = WalkState->OwnerId; 26767754Smsmith } 26867754Smsmith 26967754Smsmith 27067754Smsmith /* link the new entry into the parent and existing children */ 27167754Smsmith 27267754Smsmith /* TBD: Could be first, last, or alphabetic */ 27367754Smsmith 27467754Smsmith ChildNode = ParentNode->Child; 27567754Smsmith if (!ChildNode) 27667754Smsmith { 27767754Smsmith ParentNode->Child = Node; 27867754Smsmith } 27967754Smsmith 28067754Smsmith else 28167754Smsmith { 28267754Smsmith while (!(ChildNode->Flags & ANOBJ_END_OF_PEER_LIST)) 28367754Smsmith { 28467754Smsmith ChildNode = ChildNode->Peer; 28567754Smsmith } 28667754Smsmith 28767754Smsmith ChildNode->Peer = Node; 28867754Smsmith 28967754Smsmith /* Clear end-of-list flag */ 29067754Smsmith 29167754Smsmith ChildNode->Flags &= ~ANOBJ_END_OF_PEER_LIST; 29267754Smsmith } 29367754Smsmith 29467754Smsmith /* Init the new entry */ 29567754Smsmith 29667754Smsmith Node->OwnerId = OwnerId; 29767754Smsmith Node->Flags |= ANOBJ_END_OF_PEER_LIST; 29867754Smsmith Node->Peer = ParentNode; 29967754Smsmith 30067754Smsmith 30167754Smsmith /* 30267754Smsmith * If adding a name with unknown type, or having to 30367754Smsmith * add the region in order to define fields in it, we 30467754Smsmith * have a forward reference. 30567754Smsmith */ 30667754Smsmith if ((ACPI_TYPE_ANY == Type) || 30777424Smsmith (INTERNAL_TYPE_FIELD_DEFN == Type) || 30867754Smsmith (INTERNAL_TYPE_BANK_FIELD_DEFN == Type)) 30967754Smsmith { 31067754Smsmith /* 31167754Smsmith * We don't want to abort here, however! 31267754Smsmith * We will fill in the actual type when the 31367754Smsmith * real definition is found later. 31467754Smsmith */ 31577424Smsmith DEBUG_PRINTP (ACPI_INFO, ("[%4.4s] is a forward reference\n", 31667754Smsmith &Node->Name)); 31767754Smsmith } 31867754Smsmith 31967754Smsmith /* 32067754Smsmith * The DefFieldDefn and BankFieldDefn cases are actually 32167754Smsmith * looking up the Region in which the field will be defined 32267754Smsmith */ 32377424Smsmith if ((INTERNAL_TYPE_FIELD_DEFN == Type) || 32467754Smsmith (INTERNAL_TYPE_BANK_FIELD_DEFN == Type)) 32567754Smsmith { 32667754Smsmith Type = ACPI_TYPE_REGION; 32767754Smsmith } 32867754Smsmith 32967754Smsmith /* 33067754Smsmith * Scope, DefAny, and IndexFieldDefn are bogus "types" which do 33167754Smsmith * not actually have anything to do with the type of the name 33267754Smsmith * being looked up. Save any other value of Type as the type of 33367754Smsmith * the entry. 33467754Smsmith */ 33567754Smsmith if ((Type != INTERNAL_TYPE_SCOPE) && 33667754Smsmith (Type != INTERNAL_TYPE_DEF_ANY) && 33767754Smsmith (Type != INTERNAL_TYPE_INDEX_FIELD_DEFN)) 33867754Smsmith { 33967754Smsmith Node->Type = (UINT8) Type; 34067754Smsmith } 34167754Smsmith 34277424Smsmith DEBUG_PRINTP (TRACE_NAMES, ("%4.4s added to %p at %p\n", 34367754Smsmith &Node->Name, ParentNode, Node)); 34467754Smsmith 34567754Smsmith /* 34667754Smsmith * Increment the reference count(s) of all parents up to 34767754Smsmith * the root! 34867754Smsmith */ 34967754Smsmith while ((Node = AcpiNsGetParentObject (Node)) != NULL) 35067754Smsmith { 35167754Smsmith Node->ReferenceCount++; 35267754Smsmith } 35367754Smsmith 35467754Smsmith return_VOID; 35567754Smsmith} 35667754Smsmith 35767754Smsmith 35867754Smsmith/******************************************************************************* 35967754Smsmith * 36067754Smsmith * FUNCTION: AcpiNsDeleteChildren 36167754Smsmith * 36267754Smsmith * PARAMETERS: ParentNode - Delete this objects children 36367754Smsmith * 36467754Smsmith * RETURN: None. 36567754Smsmith * 36667754Smsmith * DESCRIPTION: Delete all children of the parent object. Deletes a 36767754Smsmith * "scope". 36867754Smsmith * 36967754Smsmith ******************************************************************************/ 37067754Smsmith 37167754Smsmithvoid 37267754SmsmithAcpiNsDeleteChildren ( 37367754Smsmith ACPI_NAMESPACE_NODE *ParentNode) 37467754Smsmith{ 37567754Smsmith ACPI_NAMESPACE_NODE *ChildNode; 37667754Smsmith ACPI_NAMESPACE_NODE *NextNode; 37767754Smsmith UINT8 Flags; 37867754Smsmith 37967754Smsmith 38067754Smsmith FUNCTION_TRACE_PTR ("AcpiNsDeleteChildren", ParentNode); 38167754Smsmith 38267754Smsmith 38367754Smsmith if (!ParentNode) 38467754Smsmith { 38567754Smsmith return_VOID; 38667754Smsmith } 38767754Smsmith 38867754Smsmith /* If no children, all done! */ 38967754Smsmith 39067754Smsmith ChildNode = ParentNode->Child; 39167754Smsmith if (!ChildNode) 39267754Smsmith { 39367754Smsmith return_VOID; 39467754Smsmith } 39567754Smsmith 39667754Smsmith /* 39767754Smsmith * Deallocate all children at this level 39867754Smsmith */ 39967754Smsmith do 40067754Smsmith { 40167754Smsmith /* Get the things we need */ 40267754Smsmith 40367754Smsmith NextNode = ChildNode->Peer; 40467754Smsmith Flags = ChildNode->Flags; 40567754Smsmith 40667754Smsmith /* Grandchildren should have all been deleted already */ 40767754Smsmith 40867754Smsmith if (ChildNode->Child) 40967754Smsmith { 41077424Smsmith DEBUG_PRINTP (ACPI_ERROR, ("Found a grandchild! P=%X C=%X\n", 41167754Smsmith ParentNode, ChildNode)); 41267754Smsmith } 41367754Smsmith 41467754Smsmith /* Now we can free this child object */ 41567754Smsmith 41667754Smsmith DECREMENT_NAME_TABLE_METRICS (sizeof (ACPI_NAMESPACE_NODE)); 41767754Smsmith 41877424Smsmith DEBUG_PRINTP (ACPI_INFO, ("Object %p, Remaining %X\n", 41967754Smsmith ChildNode, AcpiGbl_CurrentNodeCount)); 42067754Smsmith 42167754Smsmith /* 42267754Smsmith * Detach an object if there is one 42367754Smsmith */ 42467754Smsmith 42567754Smsmith if (ChildNode->Object) 42667754Smsmith { 42767754Smsmith AcpiNsDetachObject (ChildNode); 42867754Smsmith } 42967754Smsmith 43080062Smsmith ACPI_MEM_FREE (ChildNode); 43167754Smsmith 43267754Smsmith /* And move on to the next child in the list */ 43367754Smsmith 43467754Smsmith ChildNode = NextNode; 43567754Smsmith 43667754Smsmith } while (!(Flags & ANOBJ_END_OF_PEER_LIST)); 43767754Smsmith 43867754Smsmith 43967754Smsmith /* Clear the parent's child pointer */ 44067754Smsmith 44167754Smsmith ParentNode->Child = NULL; 44267754Smsmith 44367754Smsmith return_VOID; 44467754Smsmith} 44567754Smsmith 44667754Smsmith 44767754Smsmith/******************************************************************************* 44867754Smsmith * 44967754Smsmith * FUNCTION: AcpiNsDeleteNamespaceSubtree 45067754Smsmith * 45167754Smsmith * PARAMETERS: None. 45267754Smsmith * 45367754Smsmith * RETURN: None. 45467754Smsmith * 45567754Smsmith * DESCRIPTION: Delete a subtree of the namespace. This includes all objects 45667754Smsmith * stored within the subtree. Scope tables are deleted also 45767754Smsmith * 45867754Smsmith ******************************************************************************/ 45967754Smsmith 46067754SmsmithACPI_STATUS 46167754SmsmithAcpiNsDeleteNamespaceSubtree ( 46267754Smsmith ACPI_NAMESPACE_NODE *ParentNode) 46367754Smsmith{ 46467754Smsmith ACPI_NAMESPACE_NODE *ChildNode; 46567754Smsmith ACPI_OPERAND_OBJECT *ObjDesc; 46667754Smsmith UINT32 Level; 46767754Smsmith 46867754Smsmith 46967754Smsmith FUNCTION_TRACE ("NsDeleteNamespaceSubtree"); 47067754Smsmith 47167754Smsmith 47267754Smsmith if (!ParentNode) 47367754Smsmith { 47467754Smsmith return_ACPI_STATUS (AE_OK); 47567754Smsmith } 47667754Smsmith 47767754Smsmith 47867754Smsmith ChildNode = 0; 47967754Smsmith Level = 1; 48067754Smsmith 48167754Smsmith /* 48267754Smsmith * Traverse the tree of objects until we bubble back up 48367754Smsmith * to where we started. 48467754Smsmith */ 48567754Smsmith 48667754Smsmith while (Level > 0) 48767754Smsmith { 48867754Smsmith /* 48967754Smsmith * Get the next typed object in this scope. 49067754Smsmith * Null returned if not found 49167754Smsmith */ 49267754Smsmith 49367754Smsmith ChildNode = AcpiNsGetNextObject (ACPI_TYPE_ANY, ParentNode, 49467754Smsmith ChildNode); 49567754Smsmith if (ChildNode) 49667754Smsmith { 49767754Smsmith /* 49867754Smsmith * Found an object - delete the object within 49967754Smsmith * the Value field 50067754Smsmith */ 50167754Smsmith 50267754Smsmith ObjDesc = AcpiNsGetAttachedObject (ChildNode); 50367754Smsmith if (ObjDesc) 50467754Smsmith { 50567754Smsmith AcpiNsDetachObject (ChildNode); 50677424Smsmith AcpiUtRemoveReference (ObjDesc); 50767754Smsmith } 50867754Smsmith 50967754Smsmith 51067754Smsmith /* Check if this object has any children */ 51167754Smsmith 51267754Smsmith if (AcpiNsGetNextObject (ACPI_TYPE_ANY, ChildNode, 0)) 51367754Smsmith { 51467754Smsmith /* 51567754Smsmith * There is at least one child of this object, 51667754Smsmith * visit the object 51767754Smsmith */ 51867754Smsmith 51967754Smsmith Level++; 52067754Smsmith ParentNode = ChildNode; 52167754Smsmith ChildNode = 0; 52267754Smsmith } 52367754Smsmith } 52467754Smsmith 52567754Smsmith else 52667754Smsmith { 52767754Smsmith /* 52867754Smsmith * No more children in this object. 52967754Smsmith * We will move up to the grandparent. 53067754Smsmith */ 53167754Smsmith Level--; 53267754Smsmith 53367754Smsmith /* 53467754Smsmith * Now delete all of the children of this parent 53567754Smsmith * all at the same time. 53667754Smsmith */ 53767754Smsmith AcpiNsDeleteChildren (ParentNode); 53867754Smsmith 53967754Smsmith /* New "last child" is this parent object */ 54067754Smsmith 54167754Smsmith ChildNode = ParentNode; 54267754Smsmith 54367754Smsmith /* Now we can move up the tree to the grandparent */ 54467754Smsmith 54567754Smsmith ParentNode = AcpiNsGetParentObject (ParentNode); 54667754Smsmith } 54767754Smsmith } 54867754Smsmith 54967754Smsmith 55067754Smsmith return_ACPI_STATUS (AE_OK); 55167754Smsmith} 55267754Smsmith 55367754Smsmith 55467754Smsmith/******************************************************************************* 55567754Smsmith * 55667754Smsmith * FUNCTION: AcpiNsRemoveReference 55767754Smsmith * 55867754Smsmith * PARAMETERS: Node - Named object whose reference count is to be 55967754Smsmith * decremented 56067754Smsmith * 56167754Smsmith * RETURN: None. 56267754Smsmith * 56367754Smsmith * DESCRIPTION: Remove a Node reference. Decrements the reference count 56467754Smsmith * of all parent Nodes up to the root. Any object along 56567754Smsmith * the way that reaches zero references is freed. 56667754Smsmith * 56767754Smsmith ******************************************************************************/ 56867754Smsmith 56969450Smsmithstatic void 57067754SmsmithAcpiNsRemoveReference ( 57167754Smsmith ACPI_NAMESPACE_NODE *Node) 57267754Smsmith{ 57367754Smsmith ACPI_NAMESPACE_NODE *NextNode; 57467754Smsmith 57567754Smsmith 57667754Smsmith /* 57767754Smsmith * Decrement the reference count(s) of this object and all 57867754Smsmith * objects up to the root, Delete anything with zero remaining references. 57967754Smsmith */ 58067754Smsmith NextNode = Node; 58167754Smsmith while (NextNode) 58267754Smsmith { 58367754Smsmith /* Decrement the reference count on this object*/ 58467754Smsmith 58567754Smsmith NextNode->ReferenceCount--; 58667754Smsmith 58767754Smsmith /* Delete the object if no more references */ 58867754Smsmith 58967754Smsmith if (!NextNode->ReferenceCount) 59067754Smsmith { 59167754Smsmith /* Delete all children and delete the object */ 59267754Smsmith 59367754Smsmith AcpiNsDeleteChildren (NextNode); 59467754Smsmith AcpiNsDeleteNode (NextNode); 59567754Smsmith } 59667754Smsmith 59767754Smsmith /* Move up to parent */ 59867754Smsmith 59967754Smsmith NextNode = AcpiNsGetParentObject (NextNode); 60067754Smsmith } 60167754Smsmith} 60267754Smsmith 60367754Smsmith 60467754Smsmith/******************************************************************************* 60567754Smsmith * 60667754Smsmith * FUNCTION: AcpiNsDeleteNamespaceByOwner 60767754Smsmith * 60867754Smsmith * PARAMETERS: None. 60967754Smsmith * 61067754Smsmith * RETURN: None. 61167754Smsmith * 61267754Smsmith * DESCRIPTION: Delete entries within the namespace that are owned by a 61367754Smsmith * specific ID. Used to delete entire ACPI tables. All 61467754Smsmith * reference counts are updated. 61567754Smsmith * 61667754Smsmith ******************************************************************************/ 61767754Smsmith 61867754SmsmithACPI_STATUS 61967754SmsmithAcpiNsDeleteNamespaceByOwner ( 62067754Smsmith UINT16 OwnerId) 62167754Smsmith{ 62267754Smsmith ACPI_NAMESPACE_NODE *ChildNode; 62367754Smsmith UINT32 Level; 62467754Smsmith ACPI_OPERAND_OBJECT *ObjDesc; 62567754Smsmith ACPI_NAMESPACE_NODE *ParentNode; 62667754Smsmith 62767754Smsmith 62867754Smsmith FUNCTION_TRACE ("NsDeleteNamespaceSubtree"); 62967754Smsmith 63067754Smsmith 63167754Smsmith ParentNode = AcpiGbl_RootNode; 63267754Smsmith ChildNode = 0; 63367754Smsmith Level = 1; 63467754Smsmith 63567754Smsmith /* 63667754Smsmith * Traverse the tree of objects until we bubble back up 63767754Smsmith * to where we started. 63867754Smsmith */ 63967754Smsmith 64067754Smsmith while (Level > 0) 64167754Smsmith { 64267754Smsmith /* 64367754Smsmith * Get the next typed object in this scope. 64467754Smsmith * Null returned if not found 64567754Smsmith */ 64667754Smsmith 64767754Smsmith ChildNode = AcpiNsGetNextObject (ACPI_TYPE_ANY, ParentNode, 64867754Smsmith ChildNode); 64967754Smsmith 65067754Smsmith if (ChildNode) 65167754Smsmith { 65267754Smsmith if (ChildNode->OwnerId == OwnerId) 65367754Smsmith { 65467754Smsmith /* 65567754Smsmith * Found an object - delete the object within 65667754Smsmith * the Value field 65767754Smsmith */ 65867754Smsmith 65967754Smsmith ObjDesc = AcpiNsGetAttachedObject (ChildNode); 66067754Smsmith if (ObjDesc) 66167754Smsmith { 66267754Smsmith AcpiNsDetachObject (ChildNode); 66377424Smsmith AcpiUtRemoveReference (ObjDesc); 66467754Smsmith } 66567754Smsmith } 66667754Smsmith 66767754Smsmith /* Check if this object has any children */ 66867754Smsmith 66967754Smsmith if (AcpiNsGetNextObject (ACPI_TYPE_ANY, ChildNode, 0)) 67067754Smsmith { 67167754Smsmith /* 67267754Smsmith * There is at least one child of this object, 67367754Smsmith * visit the object 67467754Smsmith */ 67567754Smsmith 67667754Smsmith Level++; 67767754Smsmith ParentNode = ChildNode; 67867754Smsmith ChildNode = 0; 67967754Smsmith } 68067754Smsmith 68167754Smsmith else if (ChildNode->OwnerId == OwnerId) 68267754Smsmith { 68367754Smsmith AcpiNsRemoveReference (ChildNode); 68467754Smsmith } 68567754Smsmith } 68667754Smsmith 68767754Smsmith else 68867754Smsmith { 68967754Smsmith /* 69067754Smsmith * No more children in this object. Move up to grandparent. 69167754Smsmith */ 69267754Smsmith Level--; 69367754Smsmith 69467754Smsmith if (Level != 0) 69567754Smsmith { 69667754Smsmith if (ParentNode->OwnerId == OwnerId) 69767754Smsmith { 69867754Smsmith AcpiNsRemoveReference (ParentNode); 69967754Smsmith } 70067754Smsmith } 70167754Smsmith 70267754Smsmith /* New "last child" is this parent object */ 70367754Smsmith 70467754Smsmith ChildNode = ParentNode; 70567754Smsmith 70667754Smsmith /* Now we can move up the tree to the grandparent */ 70767754Smsmith 70867754Smsmith ParentNode = AcpiNsGetParentObject (ParentNode); 70967754Smsmith } 71067754Smsmith } 71167754Smsmith 71267754Smsmith 71367754Smsmith return_ACPI_STATUS (AE_OK); 71467754Smsmith} 71567754Smsmith 71667754Smsmith 717