807 lines
23 KiB
C
807 lines
23 KiB
C
/*******************************************************************************
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*
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* Module Name: cmdelete - object deletion and reference count utilities
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* $Revision: 62 $
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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, 2000, 2001, 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 __CMDELETE_C__
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#include "acpi.h"
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#include "acinterp.h"
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#include "acnamesp.h"
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#include "actables.h"
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#include "acparser.h"
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#define _COMPONENT MISCELLANEOUS
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MODULE_NAME ("cmdelete")
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/*******************************************************************************
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*
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* FUNCTION: AcpiCmDeleteInternalObj
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*
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* PARAMETERS: *Object - Pointer to the list to be deleted
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*
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* RETURN: None
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*
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* DESCRIPTION: Low level object deletion, after reference counts have been
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* updated (All reference counts, including sub-objects!)
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*
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******************************************************************************/
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void
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AcpiCmDeleteInternalObj (
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ACPI_OPERAND_OBJECT *Object)
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{
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void *ObjPointer = NULL;
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ACPI_OPERAND_OBJECT *HandlerDesc;
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FUNCTION_TRACE_PTR ("CmDeleteInternalObj", Object);
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if (!Object)
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{
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return_VOID;
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}
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/*
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* Must delete or free any pointers within the object that are not
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* actual ACPI objects (for example, a raw buffer pointer).
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*/
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switch (Object->Common.Type)
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{
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case ACPI_TYPE_STRING:
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DEBUG_PRINT (ACPI_INFO,
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("CmDeleteInternalObj: **** String %p, ptr %p\n",
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Object, Object->String.Pointer));
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/* Free the actual string buffer */
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ObjPointer = Object->String.Pointer;
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break;
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case ACPI_TYPE_BUFFER:
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DEBUG_PRINT (ACPI_INFO,
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("CmDeleteInternalObj: **** Buffer %p, ptr %p\n",
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Object, Object->Buffer.Pointer));
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/* Free the actual buffer */
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ObjPointer = Object->Buffer.Pointer;
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break;
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case ACPI_TYPE_PACKAGE:
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DEBUG_PRINT (ACPI_INFO,
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("CmDeleteInternalObj: **** Package of count %X\n",
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Object->Package.Count));
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/*
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* Elements of the package are not handled here, they are deleted
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* separately
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*/
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/* Free the (variable length) element pointer array */
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ObjPointer = Object->Package.Elements;
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break;
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case ACPI_TYPE_MUTEX:
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DEBUG_PRINT (ACPI_INFO,
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("CmDeleteInternalObj: ***** Mutex %p, Semaphore %p\n",
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Object, Object->Mutex.Semaphore));
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AcpiOsDeleteSemaphore (Object->Mutex.Semaphore);
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break;
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case ACPI_TYPE_EVENT:
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DEBUG_PRINT (ACPI_INFO,
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("CmDeleteInternalObj: ***** Event %p, Semaphore %p\n",
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Object, Object->Event.Semaphore));
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AcpiOsDeleteSemaphore (Object->Event.Semaphore);
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Object->Event.Semaphore = NULL;
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break;
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case ACPI_TYPE_METHOD:
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DEBUG_PRINT (ACPI_INFO,
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("CmDeleteInternalObj: ***** Method %p\n", Object));
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/* Delete the method semaphore if it exists */
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if (Object->Method.Semaphore)
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{
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AcpiOsDeleteSemaphore (Object->Method.Semaphore);
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Object->Method.Semaphore = NULL;
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}
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break;
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case ACPI_TYPE_REGION:
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DEBUG_PRINT (ACPI_INFO,
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("CmDeleteInternalObj: ***** Region %p\n",
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Object));
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if (Object->Region.Extra)
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{
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/*
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* Free the RegionContext if and only if the handler is one of the
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* default handlers -- and therefore, we created the context object
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* locally, it was not created by an external caller.
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*/
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HandlerDesc = Object->Region.AddrHandler;
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if ((HandlerDesc) &&
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(HandlerDesc->AddrHandler.Hflags == ADDR_HANDLER_DEFAULT_INSTALLED))
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{
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ObjPointer = Object->Region.Extra->Extra.RegionContext;
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}
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/* Now we can free the Extra object */
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AcpiCmDeleteObjectDesc (Object->Region.Extra);
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}
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break;
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case ACPI_TYPE_FIELD_UNIT:
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DEBUG_PRINT (ACPI_INFO,
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("CmDeleteInternalObj: ***** FieldUnit %p\n",
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Object));
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if (Object->FieldUnit.Extra)
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{
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AcpiCmDeleteObjectDesc (Object->FieldUnit.Extra);
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}
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break;
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default:
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break;
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}
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/*
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* Delete any allocated memory found above
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*/
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if (ObjPointer)
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{
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if (!AcpiTbSystemTablePointer (ObjPointer))
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{
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DEBUG_PRINT (ACPI_INFO,
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("CmDeleteInternalObj: Deleting Obj Ptr %p \n", ObjPointer));
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AcpiCmFree (ObjPointer);
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}
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}
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/* Only delete the object if it was dynamically allocated */
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if (Object->Common.Flags & AOPOBJ_STATIC_ALLOCATION)
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{
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DEBUG_PRINT (ACPI_INFO,
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("CmDeleteInternalObj: Object %p [%s] static allocation, no delete\n",
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Object, AcpiCmGetTypeName (Object->Common.Type)));
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}
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if (!(Object->Common.Flags & AOPOBJ_STATIC_ALLOCATION))
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{
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DEBUG_PRINT (ACPI_INFO,
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("CmDeleteInternalObj: Deleting object %p [%s]\n",
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Object, AcpiCmGetTypeName (Object->Common.Type)));
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AcpiCmDeleteObjectDesc (Object);
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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: AcpiCmDeleteInternalObjectList
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*
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* PARAMETERS: *ObjList - Pointer to the list to be deleted
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*
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* RETURN: Status - the status of the call
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*
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* DESCRIPTION: This function deletes an internal object list, including both
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* simple objects and package objects
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiCmDeleteInternalObjectList (
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ACPI_OPERAND_OBJECT **ObjList)
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{
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ACPI_OPERAND_OBJECT **InternalObj;
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FUNCTION_TRACE ("CmDeleteInternalObjectList");
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/* Walk the null-terminated internal list */
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for (InternalObj = ObjList; *InternalObj; InternalObj++)
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{
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/*
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* Check for a package
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* Simple objects are simply stored in the array and do not
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* need to be deleted separately.
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*/
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if (IS_THIS_OBJECT_TYPE ((*InternalObj), ACPI_TYPE_PACKAGE))
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{
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/* Delete the package */
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/*
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* TBD: [Investigate] This might not be the right thing to do,
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* depending on how the internal package object was allocated!!!
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*/
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AcpiCmDeleteInternalObj (*InternalObj);
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}
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}
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/* Free the combined parameter pointer list and object array */
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AcpiCmFree (ObjList);
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiCmUpdateRefCount
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*
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* PARAMETERS: *Object - Object whose ref count is to be updated
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* Action - What to do
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*
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* RETURN: New ref count
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*
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* DESCRIPTION: Modify the ref count and return it.
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*
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******************************************************************************/
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static void
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AcpiCmUpdateRefCount (
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ACPI_OPERAND_OBJECT *Object,
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UINT32 Action)
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{
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UINT16 Count;
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UINT16 NewCount;
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if (!Object)
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{
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return;
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}
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Count = Object->Common.ReferenceCount;
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NewCount = Count;
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/*
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* Reference count action (increment, decrement, or force delete)
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*/
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switch (Action)
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{
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case REF_INCREMENT:
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NewCount++;
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Object->Common.ReferenceCount = NewCount;
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DEBUG_PRINT (ACPI_INFO,
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("CmUpdateRefCount: Obj %p Refs=%X, [Incremented]\n",
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Object, NewCount));
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break;
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case REF_DECREMENT:
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if (Count < 1)
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{
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DEBUG_PRINT (ACPI_INFO,
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("CmUpdateRefCount: Obj %p Refs=%X, can't decrement! (Set to 0)\n",
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Object, NewCount));
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NewCount = 0;
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}
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else
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{
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NewCount--;
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DEBUG_PRINT (ACPI_INFO,
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("CmUpdateRefCount: Obj %p Refs=%X, [Decremented]\n",
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Object, NewCount));
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}
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if (Object->Common.Type == ACPI_TYPE_METHOD)
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{
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DEBUG_PRINT (ACPI_INFO,
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("CmUpdateRefCount: Method Obj %p Refs=%X, [Decremented]\n",
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Object, NewCount));
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}
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Object->Common.ReferenceCount = NewCount;
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if (NewCount == 0)
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{
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AcpiCmDeleteInternalObj (Object);
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}
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break;
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case REF_FORCE_DELETE:
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DEBUG_PRINT (ACPI_INFO,
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("CmUpdateRefCount: Obj %p Refs=%X, Force delete! (Set to 0)\n",
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Object, Count));
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NewCount = 0;
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Object->Common.ReferenceCount = NewCount;
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AcpiCmDeleteInternalObj (Object);
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break;
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default:
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DEBUG_PRINT (ACPI_ERROR,
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("CmUpdateRefCount: Unknown action (%X)\n", Action));
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break;
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}
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/*
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* Sanity check the reference count, for debug purposes only.
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* (A deleted object will have a huge reference count)
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*/
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if (Count > MAX_REFERENCE_COUNT)
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{
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DEBUG_PRINT (ACPI_ERROR,
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("CmUpdateRefCount: **** AE_ERROR **** Invalid Reference Count (%X) in object %p\n\n",
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Count, Object));
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}
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return;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiCmUpdateObjectReference
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*
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* PARAMETERS: *Object - Increment ref count for this object
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* and all sub-objects
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* Action - Either REF_INCREMENT or REF_DECREMENT or
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* REF_FORCE_DELETE
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*
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* RETURN: Status
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*
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* DESCRIPTION: Increment the object reference count
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*
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* Object references are incremented when:
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* 1) An object is attached to a Node (namespace object)
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* 2) An object is copied (all subobjects must be incremented)
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*
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* Object references are decremented when:
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* 1) An object is detached from an Node
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiCmUpdateObjectReference (
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ACPI_OPERAND_OBJECT *Object,
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UINT16 Action)
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{
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ACPI_STATUS Status;
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UINT32 i;
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ACPI_OPERAND_OBJECT *Next;
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ACPI_OPERAND_OBJECT *New;
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ACPI_GENERIC_STATE *StateList = NULL;
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ACPI_GENERIC_STATE *State;
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FUNCTION_TRACE_PTR ("CmUpdateObjectReference", Object);
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/* Ignore a null object ptr */
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if (!Object)
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{
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return_ACPI_STATUS (AE_OK);
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}
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/*
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* Make sure that this isn't a namespace handle or an AML pointer
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*/
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if (VALID_DESCRIPTOR_TYPE (Object, ACPI_DESC_TYPE_NAMED))
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{
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DEBUG_PRINT (ACPI_INFO,
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("CmUpdateObjectReference: Object %p is NS handle\n",
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Object));
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return_ACPI_STATUS (AE_OK);
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}
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if (AcpiTbSystemTablePointer (Object))
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{
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DEBUG_PRINT (ACPI_INFO,
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("CmUpdateObjectReference: **** Object %p is Pcode Ptr\n",
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Object));
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return_ACPI_STATUS (AE_OK);
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}
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State = AcpiCmCreateUpdateState (Object, Action);
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while (State)
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{
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Object = State->Update.Object;
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Action = State->Update.Value;
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AcpiCmDeleteGenericState (State);
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/*
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* All sub-objects must have their reference count incremented also.
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* Different object types have different subobjects.
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*/
|
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switch (Object->Common.Type)
|
|
{
|
|
|
|
case ACPI_TYPE_DEVICE:
|
|
|
|
Status = AcpiCmCreateUpdateStateAndPush (Object->Device.AddrHandler,
|
|
Action, &StateList);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
AcpiCmUpdateRefCount (Object->Device.SysHandler, Action);
|
|
AcpiCmUpdateRefCount (Object->Device.DrvHandler, Action);
|
|
break;
|
|
|
|
|
|
case INTERNAL_TYPE_ADDRESS_HANDLER:
|
|
|
|
/* Must walk list of address handlers */
|
|
|
|
Next = Object->AddrHandler.Next;
|
|
while (Next)
|
|
{
|
|
New = Next->AddrHandler.Next;
|
|
AcpiCmUpdateRefCount (Next, Action);
|
|
|
|
Next = New;
|
|
}
|
|
break;
|
|
|
|
|
|
case ACPI_TYPE_PACKAGE:
|
|
|
|
/*
|
|
* We must update all the sub-objects of the package
|
|
* (Each of whom may have their own sub-objects, etc.
|
|
*/
|
|
for (i = 0; i < Object->Package.Count; i++)
|
|
{
|
|
/*
|
|
* Push each element onto the stack for later processing.
|
|
* Note: There can be null elements within the package,
|
|
* these are simply ignored
|
|
*/
|
|
|
|
Status = AcpiCmCreateUpdateStateAndPush (
|
|
Object->Package.Elements[i], Action, &StateList);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
}
|
|
break;
|
|
|
|
|
|
case ACPI_TYPE_FIELD_UNIT:
|
|
|
|
Status = AcpiCmCreateUpdateStateAndPush (
|
|
Object->FieldUnit.Container, Action, &StateList);
|
|
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
break;
|
|
|
|
|
|
case INTERNAL_TYPE_DEF_FIELD:
|
|
|
|
Status = AcpiCmCreateUpdateStateAndPush (
|
|
Object->Field.Container, Action, &StateList);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
break;
|
|
|
|
|
|
case INTERNAL_TYPE_BANK_FIELD:
|
|
|
|
Status = AcpiCmCreateUpdateStateAndPush (
|
|
Object->BankField.BankSelect, Action, &StateList);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
Status = AcpiCmCreateUpdateStateAndPush (
|
|
Object->BankField.Container, Action, &StateList);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
break;
|
|
|
|
|
|
case ACPI_TYPE_REGION:
|
|
|
|
/* TBD: [Investigate]
|
|
AcpiCmUpdateRefCount (Object->Region.AddrHandler, Action);
|
|
*/
|
|
/*
|
|
Status =
|
|
AcpiCmCreateUpdateStateAndPush (Object->Region.AddrHandler,
|
|
Action, &StateList);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
*/
|
|
break;
|
|
|
|
|
|
case INTERNAL_TYPE_REFERENCE:
|
|
|
|
break;
|
|
}
|
|
|
|
|
|
/*
|
|
* Now we can update the count in the main object. This can only
|
|
* happen after we update the sub-objects in case this causes the
|
|
* main object to be deleted.
|
|
*/
|
|
|
|
AcpiCmUpdateRefCount (Object, Action);
|
|
|
|
|
|
/* Move on to the next object to be updated */
|
|
|
|
State = AcpiCmPopGenericState (&StateList);
|
|
}
|
|
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiCmAddReference
|
|
*
|
|
* PARAMETERS: *Object - Object whose reference count is to be
|
|
* incremented
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Add one reference to an ACPI object
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
AcpiCmAddReference (
|
|
ACPI_OPERAND_OBJECT *Object)
|
|
{
|
|
|
|
FUNCTION_TRACE_PTR ("CmAddReference", Object);
|
|
|
|
|
|
/*
|
|
* Ensure that we have a valid object
|
|
*/
|
|
|
|
if (!AcpiCmValidInternalObject (Object))
|
|
{
|
|
return_VOID;
|
|
}
|
|
|
|
/*
|
|
* We have a valid ACPI internal object, now increment the reference count
|
|
*/
|
|
|
|
AcpiCmUpdateObjectReference (Object, REF_INCREMENT);
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiCmRemoveReference
|
|
*
|
|
* PARAMETERS: *Object - Object whose ref count will be decremented
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Decrement the reference count of an ACPI internal object
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
AcpiCmRemoveReference (
|
|
ACPI_OPERAND_OBJECT *Object)
|
|
{
|
|
|
|
FUNCTION_TRACE_PTR ("CmRemoveReference", Object);
|
|
|
|
|
|
/*
|
|
* Ensure that we have a valid object
|
|
*/
|
|
|
|
if (!AcpiCmValidInternalObject (Object))
|
|
{
|
|
return_VOID;
|
|
}
|
|
|
|
DEBUG_PRINT (ACPI_INFO, ("CmRemoveReference: Obj %p Refs=%X\n",
|
|
Object, Object->Common.ReferenceCount));
|
|
|
|
/*
|
|
* Decrement the reference count, and only actually delete the object
|
|
* if the reference count becomes 0. (Must also decrement the ref count
|
|
* of all subobjects!)
|
|
*/
|
|
|
|
AcpiCmUpdateObjectReference (Object, REF_DECREMENT);
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
|