389 lines
15 KiB
C
389 lines
15 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: nswalk - Functions for walking the ACPI namespace
|
|
* $Revision: 1.46 $
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/******************************************************************************
|
|
*
|
|
* 1. Copyright Notice
|
|
*
|
|
* Some or all of this work - Copyright (c) 1999 - 2007, 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 __NSWALK_C__
|
|
|
|
#include <contrib/dev/acpica/acpi.h>
|
|
#include <contrib/dev/acpica/acnamesp.h>
|
|
|
|
|
|
#define _COMPONENT ACPI_NAMESPACE
|
|
ACPI_MODULE_NAME ("nswalk")
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsGetNextNode
|
|
*
|
|
* PARAMETERS: Type - Type of node to be searched for
|
|
* ParentNode - Parent node whose children we are
|
|
* getting
|
|
* ChildNode - Previous child that was found.
|
|
* The NEXT child will be returned
|
|
*
|
|
* RETURN: ACPI_NAMESPACE_NODE - Pointer to the NEXT child or NULL if
|
|
* none is found.
|
|
*
|
|
* DESCRIPTION: Return the next peer node within the namespace. If Handle
|
|
* is valid, Scope is ignored. Otherwise, the first node
|
|
* within Scope is returned.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_NAMESPACE_NODE *
|
|
AcpiNsGetNextNode (
|
|
ACPI_OBJECT_TYPE Type,
|
|
ACPI_NAMESPACE_NODE *ParentNode,
|
|
ACPI_NAMESPACE_NODE *ChildNode)
|
|
{
|
|
ACPI_NAMESPACE_NODE *NextNode = NULL;
|
|
|
|
|
|
ACPI_FUNCTION_ENTRY ();
|
|
|
|
|
|
if (!ChildNode)
|
|
{
|
|
/* It's really the parent's _scope_ that we want */
|
|
|
|
NextNode = ParentNode->Child;
|
|
}
|
|
|
|
else
|
|
{
|
|
/* Start search at the NEXT node */
|
|
|
|
NextNode = AcpiNsGetNextValidNode (ChildNode);
|
|
}
|
|
|
|
/* If any type is OK, we are done */
|
|
|
|
if (Type == ACPI_TYPE_ANY)
|
|
{
|
|
/* NextNode is NULL if we are at the end-of-list */
|
|
|
|
return (NextNode);
|
|
}
|
|
|
|
/* Must search for the node -- but within this scope only */
|
|
|
|
while (NextNode)
|
|
{
|
|
/* If type matches, we are done */
|
|
|
|
if (NextNode->Type == Type)
|
|
{
|
|
return (NextNode);
|
|
}
|
|
|
|
/* Otherwise, move on to the next node */
|
|
|
|
NextNode = AcpiNsGetNextValidNode (NextNode);
|
|
}
|
|
|
|
/* Not found */
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsWalkNamespace
|
|
*
|
|
* PARAMETERS: Type - ACPI_OBJECT_TYPE to search for
|
|
* StartNode - Handle in namespace where search begins
|
|
* MaxDepth - Depth to which search is to reach
|
|
* Flags - Whether to unlock the NS before invoking
|
|
* the callback routine
|
|
* UserFunction - Called when an object of "Type" is found
|
|
* Context - Passed to user function
|
|
* ReturnValue - from the UserFunction if terminated early.
|
|
* Otherwise, returns NULL.
|
|
* RETURNS: Status
|
|
*
|
|
* DESCRIPTION: Performs a modified depth-first walk of the namespace tree,
|
|
* starting (and ending) at the node specified by StartHandle.
|
|
* The UserFunction is called whenever a node that matches
|
|
* the type parameter is found. If the user function returns
|
|
* a non-zero value, the search is terminated immediately and this
|
|
* value is returned to the caller.
|
|
*
|
|
* The point of this procedure is to provide a generic namespace
|
|
* walk routine that can be called from multiple places to
|
|
* provide multiple services; the User Function can be tailored
|
|
* to each task, whether it is a print function, a compare
|
|
* function, etc.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiNsWalkNamespace (
|
|
ACPI_OBJECT_TYPE Type,
|
|
ACPI_HANDLE StartNode,
|
|
UINT32 MaxDepth,
|
|
UINT32 Flags,
|
|
ACPI_WALK_CALLBACK UserFunction,
|
|
void *Context,
|
|
void **ReturnValue)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_STATUS MutexStatus;
|
|
ACPI_NAMESPACE_NODE *ChildNode;
|
|
ACPI_NAMESPACE_NODE *ParentNode;
|
|
ACPI_OBJECT_TYPE ChildType;
|
|
UINT32 Level;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (NsWalkNamespace);
|
|
|
|
|
|
/* Special case for the namespace Root Node */
|
|
|
|
if (StartNode == ACPI_ROOT_OBJECT)
|
|
{
|
|
StartNode = AcpiGbl_RootNode;
|
|
}
|
|
|
|
/* Null child means "get first node" */
|
|
|
|
ParentNode = StartNode;
|
|
ChildNode = NULL;
|
|
ChildType = ACPI_TYPE_ANY;
|
|
Level = 1;
|
|
|
|
/*
|
|
* Traverse the tree of nodes until we bubble back up to where we
|
|
* started. When Level is zero, the loop is done because we have
|
|
* bubbled up to (and passed) the original parent handle (StartEntry)
|
|
*/
|
|
while (Level > 0)
|
|
{
|
|
/* Get the next node in this scope. Null if not found */
|
|
|
|
Status = AE_OK;
|
|
ChildNode = AcpiNsGetNextNode (ACPI_TYPE_ANY, ParentNode, ChildNode);
|
|
if (ChildNode)
|
|
{
|
|
/* Found next child, get the type if we are not searching for ANY */
|
|
|
|
if (Type != ACPI_TYPE_ANY)
|
|
{
|
|
ChildType = ChildNode->Type;
|
|
}
|
|
|
|
/*
|
|
* Ignore all temporary namespace nodes (created during control
|
|
* method execution) unless told otherwise. These temporary nodes
|
|
* can cause a race condition because they can be deleted during the
|
|
* execution of the user function (if the namespace is unlocked before
|
|
* invocation of the user function.) Only the debugger namespace dump
|
|
* will examine the temporary nodes.
|
|
*/
|
|
if ((ChildNode->Flags & ANOBJ_TEMPORARY) &&
|
|
!(Flags & ACPI_NS_WALK_TEMP_NODES))
|
|
{
|
|
Status = AE_CTRL_DEPTH;
|
|
}
|
|
|
|
/* Type must match requested type */
|
|
|
|
else if (ChildType == Type)
|
|
{
|
|
/*
|
|
* Found a matching node, invoke the user callback function.
|
|
* Unlock the namespace if flag is set.
|
|
*/
|
|
if (Flags & ACPI_NS_WALK_UNLOCK)
|
|
{
|
|
MutexStatus = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (MutexStatus))
|
|
{
|
|
return_ACPI_STATUS (MutexStatus);
|
|
}
|
|
}
|
|
|
|
Status = UserFunction (ChildNode, Level, Context, ReturnValue);
|
|
|
|
if (Flags & ACPI_NS_WALK_UNLOCK)
|
|
{
|
|
MutexStatus = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (MutexStatus))
|
|
{
|
|
return_ACPI_STATUS (MutexStatus);
|
|
}
|
|
}
|
|
|
|
switch (Status)
|
|
{
|
|
case AE_OK:
|
|
case AE_CTRL_DEPTH:
|
|
|
|
/* Just keep going */
|
|
break;
|
|
|
|
case AE_CTRL_TERMINATE:
|
|
|
|
/* Exit now, with OK status */
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
|
|
default:
|
|
|
|
/* All others are valid exceptions */
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Depth first search: Attempt to go down another level in the
|
|
* namespace if we are allowed to. Don't go any further if we have
|
|
* reached the caller specified maximum depth or if the user
|
|
* function has specified that the maximum depth has been reached.
|
|
*/
|
|
if ((Level < MaxDepth) && (Status != AE_CTRL_DEPTH))
|
|
{
|
|
if (AcpiNsGetNextNode (ACPI_TYPE_ANY, ChildNode, NULL))
|
|
{
|
|
/* There is at least one child of this node, visit it */
|
|
|
|
Level++;
|
|
ParentNode = ChildNode;
|
|
ChildNode = NULL;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* No more children of this node (AcpiNsGetNextNode failed), go
|
|
* back upwards in the namespace tree to the node's parent.
|
|
*/
|
|
Level--;
|
|
ChildNode = ParentNode;
|
|
ParentNode = AcpiNsGetParentNode (ParentNode);
|
|
}
|
|
}
|
|
|
|
/* Complete walk, not terminated by user function */
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|