763 lines
22 KiB
C
763 lines
22 KiB
C
/*******************************************************************************
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*
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* Module Name: nsalloc - Namespace allocation and deletion utilities
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* $Revision: 77 $
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*
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******************************************************************************/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999 - 2002, Intel Corp.
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* All rights reserved.
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*
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* 2. License
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*
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* 2.1. This is your license from Intel Corp. under its intellectual property
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* rights. You may have additional license terms from the party that provided
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* you this software, covering your right to use that party's intellectual
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* property rights.
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*
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* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") an
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* irrevocable, perpetual, worldwide license under Intel's copyrights in the
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* base code distributed originally by Intel ("Original Intel Code") to copy,
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* make derivatives, distribute, use and display any portion of the Covered
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* Code in any form, with the right to sublicense such rights; and
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*
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* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (with the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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* license, and in no event shall the patent license extend to any additions
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* to or modifications of the Original Intel Code. No other license or right
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* is granted directly or by implication, estoppel or otherwise;
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*
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* The above copyright and patent license is granted only if the following
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* conditions are met:
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*
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* 3. Conditions
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*
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* 3.1. Redistribution of Source with Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification with rights to further distribute source must include
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* the above Copyright Notice, the above License, this list of Conditions,
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* and the following Disclaimer and Export Compliance provision. In addition,
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* Licensee must cause all Covered Code to which Licensee contributes to
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* contain a file documenting the changes Licensee made to create that Covered
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* Code and the date of any change. Licensee must include in that file the
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* documentation of any changes made by any predecessor Licensee. Licensee
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* must include a prominent statement that the modification is derived,
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* directly or indirectly, from Original Intel Code.
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*
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* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification without rights to further distribute source must
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* include the following Disclaimer and Export Compliance provision in the
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* documentation and/or other materials provided with distribution. In
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* addition, Licensee may not authorize further sublicense of source of any
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* portion of the Covered Code, and must include terms to the effect that the
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* license from Licensee to its licensee is limited to the intellectual
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* property embodied in the software Licensee provides to its licensee, and
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* not to intellectual property embodied in modifications its licensee may
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* make.
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*
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* 3.3. Redistribution of Executable. Redistribution in executable form of any
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* substantial portion of the Covered Code or modification must reproduce the
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* above Copyright Notice, and the following Disclaimer and Export Compliance
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* provision in the documentation and/or other materials provided with the
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* distribution.
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*
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* 3.4. Intel retains all right, title, and interest in and to the Original
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* Intel Code.
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*
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* 3.5. Neither the name Intel nor any other trademark owned or controlled by
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* Intel shall be used in advertising or otherwise to promote the sale, use or
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* other dealings in products derived from or relating to the Covered Code
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* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
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*
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* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
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* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
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* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
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* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
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* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
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* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
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* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
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* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
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* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
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* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
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* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
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* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
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* LIMITED REMEDY.
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*
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* 4.3. Licensee shall not export, either directly or indirectly, any of this
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* software or system incorporating such software without first obtaining any
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* required license or other approval from the U. S. Department of Commerce or
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* any other agency or department of the United States Government. In the
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* event Licensee exports any such software from the United States or
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* re-exports any such software from a foreign destination, Licensee shall
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* ensure that the distribution and export/re-export of the software is in
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* compliance with all laws, regulations, orders, or other restrictions of the
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* U.S. Export Administration Regulations. Licensee agrees that neither it nor
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* any of its subsidiaries will export/re-export any technical data, process,
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* software, or service, directly or indirectly, to any country for which the
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* United States government or any agency thereof requires an export license,
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* other governmental approval, or letter of assurance, without first obtaining
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* such license, approval or letter.
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*
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*****************************************************************************/
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#define __NSALLOC_C__
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#include "acpi.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME ("nsalloc")
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsCreateNode
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*
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* PARAMETERS: AcpiName - Name of the new node
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*
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* RETURN: None
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*
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* DESCRIPTION: Create a namespace node
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*
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******************************************************************************/
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ACPI_NAMESPACE_NODE *
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AcpiNsCreateNode (
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UINT32 Name)
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{
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ACPI_NAMESPACE_NODE *Node;
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ACPI_FUNCTION_TRACE ("NsCreateNode");
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Node = ACPI_MEM_CALLOCATE (sizeof (ACPI_NAMESPACE_NODE));
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if (!Node)
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{
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return_PTR (NULL);
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}
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ACPI_MEM_TRACKING (AcpiGbl_MemoryLists[ACPI_MEM_LIST_NSNODE].TotalAllocated++);
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Node->Name.Integer = Name;
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Node->ReferenceCount = 1;
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ACPI_SET_DESCRIPTOR_TYPE (Node, ACPI_DESC_TYPE_NAMED);
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return_PTR (Node);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsDeleteNode
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*
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* PARAMETERS: Node - Node to be deleted
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*
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* RETURN: None
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*
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* DESCRIPTION: Delete a namespace node
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*
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******************************************************************************/
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void
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AcpiNsDeleteNode (
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ACPI_NAMESPACE_NODE *Node)
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{
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ACPI_NAMESPACE_NODE *ParentNode;
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ACPI_NAMESPACE_NODE *PrevNode;
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ACPI_NAMESPACE_NODE *NextNode;
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ACPI_FUNCTION_TRACE_PTR ("NsDeleteNode", Node);
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ParentNode = AcpiNsGetParentNode (Node);
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PrevNode = NULL;
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NextNode = ParentNode->Child;
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while (NextNode != Node)
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{
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PrevNode = NextNode;
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NextNode = PrevNode->Peer;
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}
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if (PrevNode)
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{
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PrevNode->Peer = NextNode->Peer;
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if (NextNode->Flags & ANOBJ_END_OF_PEER_LIST)
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{
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PrevNode->Flags |= ANOBJ_END_OF_PEER_LIST;
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}
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}
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else
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{
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ParentNode->Child = NextNode->Peer;
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}
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ACPI_MEM_TRACKING (AcpiGbl_MemoryLists[ACPI_MEM_LIST_NSNODE].TotalFreed++);
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/*
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* Detach an object if there is one then delete the node
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*/
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AcpiNsDetachObject (Node);
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ACPI_MEM_FREE (Node);
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return_VOID;
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}
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#ifdef ACPI_ALPHABETIC_NAMESPACE
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsCompareNames
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*
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* PARAMETERS: Name1 - First name to compare
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* Name2 - Second name to compare
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*
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* RETURN: value from strncmp
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*
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* DESCRIPTION: Compare two ACPI names. Names that are prefixed with an
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* underscore are forced to be alphabetically first.
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*
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******************************************************************************/
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int
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AcpiNsCompareNames (
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char *Name1,
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char *Name2)
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{
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char ReversedName1[ACPI_NAME_SIZE];
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char ReversedName2[ACPI_NAME_SIZE];
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UINT32 i;
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UINT32 j;
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/*
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* Replace all instances of "underscore" with a value that is smaller so
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* that all names that are prefixed with underscore(s) are alphabetically
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* first.
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*
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* Reverse the name bytewise so we can just do a 32-bit compare instead
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* of a strncmp.
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*/
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for (i = 0, j= (ACPI_NAME_SIZE - 1); i < ACPI_NAME_SIZE; i++, j--)
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{
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ReversedName1[j] = Name1[i];
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if (Name1[i] == '_')
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{
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ReversedName1[j] = '*';
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}
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ReversedName2[j] = Name2[i];
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if (Name2[i] == '_')
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{
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ReversedName2[j] = '*';
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}
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}
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return (*(int *) ReversedName1 - *(int *) ReversedName2);
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}
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#endif
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsInstallNode
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*
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* PARAMETERS: WalkState - Current state of the walk
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* ParentNode - The parent of the new Node
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* Node - The new Node to install
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* Type - ACPI object type of the new Node
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*
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* RETURN: None
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*
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* DESCRIPTION: Initialize a new namespace node and install it amongst
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* its peers.
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*
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* Note: Current namespace lookup is linear search. However, the
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* nodes are linked in alphabetical order to 1) put all reserved
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* names (start with underscore) first, and to 2) make a readable
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* namespace dump.
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*
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******************************************************************************/
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void
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AcpiNsInstallNode (
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ACPI_WALK_STATE *WalkState,
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ACPI_NAMESPACE_NODE *ParentNode, /* Parent */
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ACPI_NAMESPACE_NODE *Node, /* New Child*/
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ACPI_OBJECT_TYPE Type)
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{
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UINT16 OwnerId = TABLE_ID_DSDT;
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ACPI_NAMESPACE_NODE *ChildNode;
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#ifdef ACPI_ALPHABETIC_NAMESPACE
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ACPI_NAMESPACE_NODE *PreviousChildNode;
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#endif
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ACPI_FUNCTION_TRACE ("NsInstallNode");
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/*
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* Get the owner ID from the Walk state
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* The owner ID is used to track table deletion and
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* deletion of objects created by methods
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*/
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if (WalkState)
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{
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OwnerId = WalkState->OwnerId;
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}
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/* Link the new entry into the parent and existing children */
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ChildNode = ParentNode->Child;
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if (!ChildNode)
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{
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ParentNode->Child = Node;
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Node->Flags |= ANOBJ_END_OF_PEER_LIST;
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Node->Peer = ParentNode;
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}
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else
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{
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#ifdef ACPI_ALPHABETIC_NAMESPACE
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/*
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* Walk the list whilst searching for the the correct
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* alphabetic placement.
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*/
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PreviousChildNode = NULL;
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while (AcpiNsCompareNames (ChildNode->Name.Ascii, Node->Name.Ascii) < 0)
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{
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if (ChildNode->Flags & ANOBJ_END_OF_PEER_LIST)
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{
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/* Last peer; Clear end-of-list flag */
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ChildNode->Flags &= ~ANOBJ_END_OF_PEER_LIST;
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/* This node is the new peer to the child node */
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ChildNode->Peer = Node;
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/* This node is the new end-of-list */
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Node->Flags |= ANOBJ_END_OF_PEER_LIST;
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Node->Peer = ParentNode;
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break;
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}
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/* Get next peer */
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PreviousChildNode = ChildNode;
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ChildNode = ChildNode->Peer;
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}
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/* Did the node get inserted at the end-of-list? */
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if (!(Node->Flags & ANOBJ_END_OF_PEER_LIST))
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{
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/*
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* Loop above terminated without reaching the end-of-list.
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* Insert the new node at the current location
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*/
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if (PreviousChildNode)
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{
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/* Insert node alphabetically */
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Node->Peer = ChildNode;
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PreviousChildNode->Peer = Node;
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}
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else
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{
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/* Insert node alphabetically at start of list */
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Node->Peer = ChildNode;
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ParentNode->Child = Node;
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}
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}
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#else
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while (!(ChildNode->Flags & ANOBJ_END_OF_PEER_LIST))
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{
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ChildNode = ChildNode->Peer;
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}
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ChildNode->Peer = Node;
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/* Clear end-of-list flag */
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ChildNode->Flags &= ~ANOBJ_END_OF_PEER_LIST;
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Node->Flags |= ANOBJ_END_OF_PEER_LIST;
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Node->Peer = ParentNode;
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#endif
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}
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/* Init the new entry */
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Node->OwnerId = OwnerId;
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Node->Type = (UINT8) Type;
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ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "%4.4s (%s) added to %4.4s (%s) %p at %p\n",
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Node->Name.Ascii, AcpiUtGetTypeName (Node->Type),
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ParentNode->Name.Ascii, AcpiUtGetTypeName (ParentNode->Type), ParentNode, Node));
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/*
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* Increment the reference count(s) of all parents up to
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* the root!
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*/
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while ((Node = AcpiNsGetParentNode (Node)) != NULL)
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{
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Node->ReferenceCount++;
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}
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsDeleteChildren
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*
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* PARAMETERS: ParentNode - Delete this objects children
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*
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* RETURN: None.
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*
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* DESCRIPTION: Delete all children of the parent object. In other words,
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* deletes a "scope".
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*
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******************************************************************************/
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void
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AcpiNsDeleteChildren (
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ACPI_NAMESPACE_NODE *ParentNode)
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{
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ACPI_NAMESPACE_NODE *ChildNode;
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ACPI_NAMESPACE_NODE *NextNode;
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UINT8 Flags;
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ACPI_FUNCTION_TRACE_PTR ("NsDeleteChildren", ParentNode);
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if (!ParentNode)
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{
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return_VOID;
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}
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/* If no children, all done! */
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ChildNode = ParentNode->Child;
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if (!ChildNode)
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{
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return_VOID;
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}
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/*
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* Deallocate all children at this level
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*/
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do
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{
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/* Get the things we need */
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NextNode = ChildNode->Peer;
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Flags = ChildNode->Flags;
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/* Grandchildren should have all been deleted already */
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if (ChildNode->Child)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Found a grandchild! P=%p C=%p\n",
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ParentNode, ChildNode));
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}
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/* Now we can free this child object */
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ACPI_MEM_TRACKING (AcpiGbl_MemoryLists[ACPI_MEM_LIST_NSNODE].TotalFreed++);
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ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Object %p, Remaining %X\n",
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ChildNode, AcpiGbl_CurrentNodeCount));
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/*
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* Detach an object if there is one, then free the child node
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*/
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AcpiNsDetachObject (ChildNode);
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ACPI_MEM_FREE (ChildNode);
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/* And move on to the next child in the list */
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ChildNode = NextNode;
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} while (!(Flags & ANOBJ_END_OF_PEER_LIST));
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/* Clear the parent's child pointer */
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ParentNode->Child = NULL;
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsDeleteNamespaceSubtree
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*
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* PARAMETERS: ParentNode - Root of the subtree to be deleted
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*
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* RETURN: None.
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*
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* DESCRIPTION: Delete a subtree of the namespace. This includes all objects
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* stored within the subtree.
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*
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******************************************************************************/
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void
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AcpiNsDeleteNamespaceSubtree (
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ACPI_NAMESPACE_NODE *ParentNode)
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{
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ACPI_NAMESPACE_NODE *ChildNode = NULL;
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UINT32 Level = 1;
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ACPI_FUNCTION_TRACE ("NsDeleteNamespaceSubtree");
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if (!ParentNode)
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{
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return_VOID;
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}
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/*
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* Traverse the tree of objects until we bubble back up
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* to where we started.
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*/
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while (Level > 0)
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{
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/* Get the next node in this scope (NULL if none) */
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ChildNode = AcpiNsGetNextNode (ACPI_TYPE_ANY, ParentNode,
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ChildNode);
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if (ChildNode)
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{
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/* Found a child node - detach any attached object */
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AcpiNsDetachObject (ChildNode);
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/* Check if this node has any children */
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if (AcpiNsGetNextNode (ACPI_TYPE_ANY, ChildNode, 0))
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{
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/*
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* There is at least one child of this node,
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* visit the node
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*/
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Level++;
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|
ParentNode = ChildNode;
|
|
ChildNode = 0;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* No more children of this parent node.
|
|
* Move up to the grandparent.
|
|
*/
|
|
Level--;
|
|
|
|
/*
|
|
* Now delete all of the children of this parent
|
|
* all at the same time.
|
|
*/
|
|
AcpiNsDeleteChildren (ParentNode);
|
|
|
|
/* New "last child" is this parent node */
|
|
|
|
ChildNode = ParentNode;
|
|
|
|
/* Move up the tree to the grandparent */
|
|
|
|
ParentNode = AcpiNsGetParentNode (ParentNode);
|
|
}
|
|
}
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsRemoveReference
|
|
*
|
|
* PARAMETERS: Node - Named node whose reference count is to be
|
|
* decremented
|
|
*
|
|
* RETURN: None.
|
|
*
|
|
* DESCRIPTION: Remove a Node reference. Decrements the reference count
|
|
* of all parent Nodes up to the root. Any node along
|
|
* the way that reaches zero references is freed.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static void
|
|
AcpiNsRemoveReference (
|
|
ACPI_NAMESPACE_NODE *Node)
|
|
{
|
|
ACPI_NAMESPACE_NODE *ParentNode;
|
|
ACPI_NAMESPACE_NODE *ThisNode;
|
|
|
|
|
|
ACPI_FUNCTION_ENTRY ();
|
|
|
|
|
|
/*
|
|
* Decrement the reference count(s) of this node and all
|
|
* nodes up to the root, Delete anything with zero remaining references.
|
|
*/
|
|
ThisNode = Node;
|
|
while (ThisNode)
|
|
{
|
|
/* Prepare to move up to parent */
|
|
|
|
ParentNode = AcpiNsGetParentNode (ThisNode);
|
|
|
|
/* Decrement the reference count on this node */
|
|
|
|
ThisNode->ReferenceCount--;
|
|
|
|
/* Delete the node if no more references */
|
|
|
|
if (!ThisNode->ReferenceCount)
|
|
{
|
|
/* Delete all children and delete the node */
|
|
|
|
AcpiNsDeleteChildren (ThisNode);
|
|
AcpiNsDeleteNode (ThisNode);
|
|
}
|
|
|
|
ThisNode = ParentNode;
|
|
}
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsDeleteNamespaceByOwner
|
|
*
|
|
* PARAMETERS: OwnerId - All nodes with this owner will be deleted
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Delete entries within the namespace that are owned by a
|
|
* specific ID. Used to delete entire ACPI tables. All
|
|
* reference counts are updated.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
AcpiNsDeleteNamespaceByOwner (
|
|
UINT16 OwnerId)
|
|
{
|
|
ACPI_NAMESPACE_NODE *ChildNode;
|
|
ACPI_NAMESPACE_NODE *DeletionNode;
|
|
UINT32 Level;
|
|
ACPI_NAMESPACE_NODE *ParentNode;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_U32 ("NsDeleteNamespaceByOwner", OwnerId);
|
|
|
|
|
|
ParentNode = AcpiGbl_RootNode;
|
|
ChildNode = NULL;
|
|
DeletionNode = NULL;
|
|
Level = 1;
|
|
|
|
/*
|
|
* Traverse the tree of nodes until we bubble back up
|
|
* to where we started.
|
|
*/
|
|
while (Level > 0)
|
|
{
|
|
/*
|
|
* Get the next child of this parent node. When ChildNode is NULL,
|
|
* the first child of the parent is returned
|
|
*/
|
|
ChildNode = AcpiNsGetNextNode (ACPI_TYPE_ANY, ParentNode, ChildNode);
|
|
|
|
if (DeletionNode)
|
|
{
|
|
AcpiNsRemoveReference (DeletionNode);
|
|
DeletionNode = NULL;
|
|
}
|
|
|
|
if (ChildNode)
|
|
{
|
|
if (ChildNode->OwnerId == OwnerId)
|
|
{
|
|
/* Found a matching child node - detach any attached object */
|
|
|
|
AcpiNsDetachObject (ChildNode);
|
|
}
|
|
|
|
/* Check if this node has any children */
|
|
|
|
if (AcpiNsGetNextNode (ACPI_TYPE_ANY, ChildNode, NULL))
|
|
{
|
|
/*
|
|
* There is at least one child of this node,
|
|
* visit the node
|
|
*/
|
|
Level++;
|
|
ParentNode = ChildNode;
|
|
ChildNode = NULL;
|
|
}
|
|
else if (ChildNode->OwnerId == OwnerId)
|
|
{
|
|
DeletionNode = ChildNode;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* No more children of this parent node.
|
|
* Move up to the grandparent.
|
|
*/
|
|
Level--;
|
|
if (Level != 0)
|
|
{
|
|
if (ParentNode->OwnerId == OwnerId)
|
|
{
|
|
DeletionNode = ParentNode;
|
|
}
|
|
}
|
|
|
|
/* New "last child" is this parent node */
|
|
|
|
ChildNode = ParentNode;
|
|
|
|
/* Move up the tree to the grandparent */
|
|
|
|
ParentNode = AcpiNsGetParentNode (ParentNode);
|
|
}
|
|
}
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
|