mirrors/acpica
1
0
Fork 0
mirror of https://github.com/acpica/acpica/ synced 2025-04-23 22:03:30 +03:00
Code Issues Packages Projects Releases Wiki Activity
acpica/source/components/namespace/nsalloc.c
aystarik 78c790147d Clear NTEs as they are deleted 
date	2000.05.08.16.02.00;	author rmoore1;	state Exp;
2005-06-29 18:19:05 +00:00

520 lines
16 KiB
C
Raw Blame History

/******************************************************************************
*
* Module Name: nsalloc - Namespace allocation and deletion utilities
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999, Intel Corp. All rights
* reserved.
*
* 2. License
*
* 2.1. This is your license from Intel Corp. under its intellectual property
* rights. You may have additional license terms from the party that provided
* you this software, covering your right to use that party's intellectual
* property rights.
*
* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
* copy of the source code appearing in this file ("Covered Code") an
* irrevocable, perpetual, worldwide license under Intel's copyrights in the
* base code distributed originally by Intel ("Original Intel Code") to copy,
* make derivatives, distribute, use and display any portion of the Covered
* Code in any form, with the right to sublicense such rights; and
*
* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
* license (with the right to sublicense), under only those claims of Intel
* patents that are infringed by the Original Intel Code, to make, use, sell,
* offer to sell, and import the Covered Code and derivative works thereof
* solely to the minimum extent necessary to exercise the above copyright
* license, and in no event shall the patent license extend to any additions
* to or modifications of the Original Intel Code. No other license or right
* is granted directly or by implication, estoppel or otherwise;
*
* The above copyright and patent license is granted only if the following
* conditions are met:
*
* 3. Conditions
*
* 3.1. Redistribution of Source with Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification with rights to further distribute source must include
* the above Copyright Notice, the above License, this list of Conditions,
* and the following Disclaimer and Export Compliance provision. In addition,
* Licensee must cause all Covered Code to which Licensee contributes to
* contain a file documenting the changes Licensee made to create that Covered
* Code and the date of any change. Licensee must include in that file the
* documentation of any changes made by any predecessor Licensee. Licensee
* must include a prominent statement that the modification is derived,
* directly or indirectly, from Original Intel Code.
*
* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification without rights to further distribute source must
* include the following Disclaimer and Export Compliance provision in the
* documentation and/or other materials provided with distribution. In
* addition, Licensee may not authorize further sublicense of source of any
* portion of the Covered Code, and must include terms to the effect that the
* license from Licensee to its licensee is limited to the intellectual
* property embodied in the software Licensee provides to its licensee, and
* not to intellectual property embodied in modifications its licensee may
* make.
*
* 3.3. Redistribution of Executable. Redistribution in executable form of any
* substantial portion of the Covered Code or modification must reproduce the
* above Copyright Notice, and the following Disclaimer and Export Compliance
* provision in the documentation and/or other materials provided with the
* distribution.
*
* 3.4. Intel retains all right, title, and interest in and to the Original
* Intel Code.
*
* 3.5. Neither the name Intel nor any other trademark owned or controlled by
* Intel shall be used in advertising or otherwise to promote the sale, use or
* other dealings in products derived from or relating to the Covered Code
* without prior written authorization from Intel.
*
* 4. Disclaimer and Export Compliance
*
* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
* PARTICULAR PURPOSE.
*
* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
* LIMITED REMEDY.
*
* 4.3. Licensee shall not export, either directly or indirectly, any of this
* software or system incorporating such software without first obtaining any
* required license or other approval from the U. S. Department of Commerce or
* any other agency or department of the United States Government. In the
* event Licensee exports any such software from the United States or
* re-exports any such software from a foreign destination, Licensee shall
* ensure that the distribution and export/re-export of the software is in
* compliance with all laws, regulations, orders, or other restrictions of the
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
* any of its subsidiaries will export/re-export any technical data, process,
* software, or service, directly or indirectly, to any country for which the
* United States government or any agency thereof requires an export license,
* other governmental approval, or letter of assurance, without first obtaining
* such license, approval or letter.
*
*****************************************************************************/
#define __NSALLOC_C__
#include <acpi.h>
#include <namesp.h>
#include <interp.h>
#define _COMPONENT NAMESPACE
MODULE_NAME ("nsalloc");
/****************************************************************************
*
* FUNCTION: NsAllocateNameTable
*
* PARAMETERS: NteCount - Count of NTEs to allocate
*
* RETURN: The address of the first nte in the array, or NULL
*
* DESCRIPTION: Allocate an array of nte, including prepended link space
* Array is set to all zeros via OsdCallcate().
*
***************************************************************************/
NAME_TABLE_ENTRY *
NsAllocateNameTable (
INT32 NteCount)
{
NAME_TABLE_ENTRY *NameTable = NULL;
ACPI_SIZE AllocSize;
FUNCTION_TRACE ("NsAllocateNameTable");
AllocSize = (ACPI_SIZE) NteCount * sizeof (NAME_TABLE_ENTRY);
/* Allow room for link to appendage */
AllocSize += sizeof (NAME_TABLE_ENTRY *);
NameTable = CmCallocate (AllocSize);
if (NameTable)
{
/* Move past the appendage pointer */
NameTable = (NAME_TABLE_ENTRY *) (((UINT8 *) NameTable) +
sizeof (NAME_TABLE_ENTRY *));
}
DEBUG_PRINT (TRACE_EXEC, ("NsAllocateNameTable: NameTable=%p\n", NameTable));
return_VALUE (NameTable);
}
/****************************************************************************
*
* FUNCTION: NsDeleteNamespaceSubtree
*
* PARAMETERS: None.
*
* RETURN: None.
*
* DESCRIPTION: Delete a subtree of the namespace. This includes all objects stored
* within the subtree. Scope tables are deleted also
*
***************************************************************************/
ACPI_STATUS
NsDeleteNamespaceSubtree (
NAME_TABLE_ENTRY *ParentHandle)
{
NAME_TABLE_ENTRY *ChildHandle;
UINT32 Level;
ACPI_OBJECT_INTERNAL *ObjDesc;
FUNCTION_TRACE ("NsDeleteNamespaceSubtree");
ChildHandle = 0;
Level = 1;
/*
* Traverse the tree of objects until we bubble back up
* to where we started.
*/
while (Level > 0)
{
/* Get the next typed object in this scope. Null returned if not found */
ChildHandle = NsGetNextObject (ACPI_TYPE_Any, ParentHandle, ChildHandle);
if (ChildHandle)
{
/* Found an object - delete the object within the Value field */
ObjDesc = NsGetAttachedObject (ChildHandle);
if (ObjDesc)
{
NsDetachObject (ChildHandle);
CmRemoveReference (ObjDesc);
}
/* Clear the NTE in case this scope is reused (e.g., a control method scope) */
ChildHandle->Type = ACPI_TYPE_Any;
ChildHandle->Name = 0;
/* Check if this object has any children */
if (NsGetNextObject (ACPI_TYPE_Any, ChildHandle, 0))
{
/* There is at least one child of this object, visit the object */
Level++;
ParentHandle = ChildHandle;
ChildHandle = 0;
}
else
{
/* There may be a name table even if there are no children */
NsDeleteScope (((NAME_TABLE_ENTRY *) ChildHandle)->Scope);
((NAME_TABLE_ENTRY *) ChildHandle)->Scope = NULL;
}
}
else
{
/*
* No more children in this object.
* We will move up to the grandparent.
*/
Level--;
/* Delete the scope (Name Table) associated with the parent object */
/* Don't delete the top level scope, this allows the dynamic deletion of
* objects created underneath control methods!
*/
if (Level != 0)
{
NsDeleteScope (((NAME_TABLE_ENTRY *) ParentHandle)->Scope);
((NAME_TABLE_ENTRY *) ParentHandle)->Scope = NULL;
}
/* New "last child" is this parent object */
ChildHandle = ParentHandle;
/* Now we can move up the tree to the grandparent */
ParentHandle = ParentHandle->ParentEntry;
}
}
return_ACPI_STATUS (AE_OK);
}
/****************************************************************************
*
* FUNCTION: NsRemoveReference
*
* PARAMETERS: Entry - NTE whose reference count is to be decremented
*
* RETURN: None.
*
* DESCRIPTION: Remove an NTE reference. Decrements the reference count of
* all parent NTEs up to the root. Any NTE along the way that
* reaches zero references is freed.
*
***************************************************************************/
void
NsRemoveReference (
NAME_TABLE_ENTRY *Entry)
{
NAME_TABLE_ENTRY *ThisEntry;
/* There may be a name table even if there are no children */
NsDeleteScope (Entry->Scope);
Entry->Scope = NULL;
/*
* Decrement the reference count(s) of all parents up to the root,
* And delete anything with zero remaining references.
*/
ThisEntry = Entry;
while (ThisEntry)
{
/* Decrement the reference */
ThisEntry->ReferenceCount--;
/* Delete entry if no more references */
if (!ThisEntry->ReferenceCount)
{
/* Delete the scope if present */
if (ThisEntry->Scope)
{
NsDeleteScope (ThisEntry->Scope);
ThisEntry->Scope = NULL;
}
/* Mark the entry free (This doesn't deallocate anything) */
NsFreeTableEntry (ThisEntry);
}
/* Move up to parent */
ThisEntry = ThisEntry->ParentEntry;
}
}
/****************************************************************************
*
* FUNCTION: NsDeleteNamespaceByOwner
*
* PARAMETERS: None.
*
* RETURN: None.
*
* DESCRIPTION: Delete entries within the namespace that are owned by a
* specific ID. Used to delete entire ACPI tables. All
* reference counts are updated.
*
***************************************************************************/
ACPI_STATUS
NsDeleteNamespaceByOwner (
UINT16 OwnerId)
{
NAME_TABLE_ENTRY *ChildHandle;
UINT32 Level;
ACPI_OBJECT_INTERNAL *ObjDesc;
NAME_TABLE_ENTRY *ParentHandle;
FUNCTION_TRACE ("NsDeleteNamespaceSubtree");
ParentHandle = Gbl_RootObject;
ChildHandle = 0;
Level = 1;
/*
* Traverse the tree of objects until we bubble back up
* to where we started.
*/
while (Level > 0)
{
/* Get the next typed object in this scope. Null returned if not found */
ChildHandle = NsGetNextObject (ACPI_TYPE_Any, ParentHandle, ChildHandle);
if (ChildHandle)
{
if (ChildHandle->OwnerId == OwnerId)
{
/* Found an object - delete the object within the Value field */
ObjDesc = NsGetAttachedObject (ChildHandle);
if (ObjDesc)
{
NsDetachObject (ChildHandle);
CmRemoveReference (ObjDesc);
}
}
/* Check if this object has any children */
if (NsGetNextObject (ACPI_TYPE_Any, ChildHandle, 0))
{
/* There is at least one child of this object, visit the object */
Level++;
ParentHandle = ChildHandle;
ChildHandle = 0;
}
else if (ChildHandle->OwnerId == OwnerId)
{
NsRemoveReference (ChildHandle);
}
}
else
{
/*
* No more children in this object.
* We will move up to the grandparent.
*/
Level--;
/* Delete the scope (Name Table) associated with the parent object */
/* Don't delete the top level scope, this allows the dynamic deletion of
* objects created underneath control methods!
*/
if (Level != 0)
{
if (ParentHandle->OwnerId == OwnerId)
{
NsRemoveReference (ParentHandle);
}
}
/* New "last child" is this parent object */
ChildHandle = ParentHandle;
/* Now we can move up the tree to the grandparent */
ParentHandle = ParentHandle->ParentEntry;
}
}
return_ACPI_STATUS (AE_OK);
}
/****************************************************************************
*
* FUNCTION: NsDeleteScope
*
* PARAMETERS: Scope - A handle to the scope to be deleted
*
* RETURN: None.
*
* DESCRIPTION: Delete a namespace scope, which is a Name Table with zero or
* more appendages. The table and all appendages are deleted.
*
***************************************************************************/
void
NsDeleteScope (
ACPI_HANDLE Scope)
{
NAME_TABLE_ENTRY *ThisTable;
char *AllocatedTable;
FUNCTION_TRACE_PTR ("NsDeleteScope", Scope);
if (!Scope)
{
return_VOID;
}
ThisTable = (NAME_TABLE_ENTRY *) Scope;
/*
* Deallocate the name table and all appendages
*/
do
{
/*
* Create the original allocated pointer (backup to before appendage ptr),
* and get the next appendage pointer. This ptr is null at end-of-list.
*/
AllocatedTable = (((char *) ThisTable) - sizeof (NAME_TABLE_ENTRY *));
ThisTable = NEXTSEG (ThisTable);
DEBUG_PRINT (ACPI_INFO, ("NsDeleteScope: Deleting Name Table at %p \n", AllocatedTable));
/* Now we can free the table */
CmFree (AllocatedTable);
} while (ThisTable);
return_VOID;
}
Reference in New Issue View Git Blame Copy Permalink