948 lines
27 KiB
C
948 lines
27 KiB
C
/******************************************************************************
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*
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* Module Name: nsutils - Utilities for accessing ACPI namespace, accessing
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* parents and siblings and Scope manipulation
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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 - 2011, 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
|
|
* 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
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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 __NSUTILS_C__
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#include "acpi.h"
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#include "accommon.h"
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#include "acnamesp.h"
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#include "amlcode.h"
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME ("nsutils")
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/* Local prototypes */
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static BOOLEAN
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AcpiNsValidPathSeparator (
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char Sep);
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#ifdef ACPI_OBSOLETE_FUNCTIONS
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ACPI_NAME
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AcpiNsFindParentName (
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ACPI_NAMESPACE_NODE *NodeToSearch);
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#endif
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsPrintNodePathname
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*
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* PARAMETERS: Node - Object
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* Message - Prefix message
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*
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* DESCRIPTION: Print an object's full namespace pathname
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* Manages allocation/freeing of a pathname buffer
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*
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******************************************************************************/
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void
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AcpiNsPrintNodePathname (
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ACPI_NAMESPACE_NODE *Node,
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const char *Message)
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{
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ACPI_BUFFER Buffer;
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ACPI_STATUS Status;
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if (!Node)
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{
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AcpiOsPrintf ("[NULL NAME]");
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return;
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}
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/* Convert handle to full pathname and print it (with supplied message) */
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Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER;
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Status = AcpiNsHandleToPathname (Node, &Buffer);
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if (ACPI_SUCCESS (Status))
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{
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if (Message)
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{
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AcpiOsPrintf ("%s ", Message);
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}
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AcpiOsPrintf ("[%s] (Node %p)", (char *) Buffer.Pointer, Node);
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ACPI_FREE (Buffer.Pointer);
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsValidRootPrefix
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*
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* PARAMETERS: Prefix - Character to be checked
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*
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* RETURN: TRUE if a valid prefix
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*
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* DESCRIPTION: Check if a character is a valid ACPI Root prefix
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*
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******************************************************************************/
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BOOLEAN
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AcpiNsValidRootPrefix (
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char Prefix)
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{
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return ((BOOLEAN) (Prefix == '\\'));
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsValidPathSeparator
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*
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* PARAMETERS: Sep - Character to be checked
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*
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* RETURN: TRUE if a valid path separator
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*
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* DESCRIPTION: Check if a character is a valid ACPI path separator
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*
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******************************************************************************/
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static BOOLEAN
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AcpiNsValidPathSeparator (
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char Sep)
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{
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return ((BOOLEAN) (Sep == '.'));
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsGetType
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*
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* PARAMETERS: Node - Parent Node to be examined
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*
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* RETURN: Type field from Node whose handle is passed
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*
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* DESCRIPTION: Return the type of a Namespace node
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*
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******************************************************************************/
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ACPI_OBJECT_TYPE
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AcpiNsGetType (
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ACPI_NAMESPACE_NODE *Node)
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{
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ACPI_FUNCTION_TRACE (NsGetType);
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if (!Node)
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{
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ACPI_WARNING ((AE_INFO, "Null Node parameter"));
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return_UINT32 (ACPI_TYPE_ANY);
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}
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return_UINT32 ((ACPI_OBJECT_TYPE) Node->Type);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsLocal
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*
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* PARAMETERS: Type - A namespace object type
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*
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* RETURN: LOCAL if names must be found locally in objects of the
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* passed type, 0 if enclosing scopes should be searched
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*
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* DESCRIPTION: Returns scope rule for the given object type.
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*
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******************************************************************************/
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UINT32
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AcpiNsLocal (
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ACPI_OBJECT_TYPE Type)
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{
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ACPI_FUNCTION_TRACE (NsLocal);
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if (!AcpiUtValidObjectType (Type))
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{
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/* Type code out of range */
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ACPI_WARNING ((AE_INFO, "Invalid Object Type 0x%X", Type));
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return_UINT32 (ACPI_NS_NORMAL);
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}
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return_UINT32 ((UINT32) AcpiGbl_NsProperties[Type] & ACPI_NS_LOCAL);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsGetInternalNameLength
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*
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* PARAMETERS: Info - Info struct initialized with the
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* external name pointer.
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*
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* RETURN: None
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*
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* DESCRIPTION: Calculate the length of the internal (AML) namestring
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* corresponding to the external (ASL) namestring.
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*
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******************************************************************************/
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void
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AcpiNsGetInternalNameLength (
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ACPI_NAMESTRING_INFO *Info)
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{
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const char *NextExternalChar;
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UINT32 i;
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ACPI_FUNCTION_ENTRY ();
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NextExternalChar = Info->ExternalName;
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Info->NumCarats = 0;
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Info->NumSegments = 0;
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Info->FullyQualified = FALSE;
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/*
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* For the internal name, the required length is 4 bytes per segment, plus
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* 1 each for RootPrefix, MultiNamePrefixOp, segment count, trailing null
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* (which is not really needed, but no there's harm in putting it there)
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*
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* strlen() + 1 covers the first NameSeg, which has no path separator
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*/
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if (AcpiNsValidRootPrefix (*NextExternalChar))
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{
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Info->FullyQualified = TRUE;
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NextExternalChar++;
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/* Skip redundant RootPrefix, like \\_SB.PCI0.SBRG.EC0 */
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while (AcpiNsValidRootPrefix (*NextExternalChar))
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{
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NextExternalChar++;
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}
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}
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else
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{
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/* Handle Carat prefixes */
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while (*NextExternalChar == '^')
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{
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Info->NumCarats++;
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NextExternalChar++;
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}
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}
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|
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/*
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* Determine the number of ACPI name "segments" by counting the number of
|
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* path separators within the string. Start with one segment since the
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* segment count is [(# separators) + 1], and zero separators is ok.
|
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*/
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if (*NextExternalChar)
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{
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Info->NumSegments = 1;
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for (i = 0; NextExternalChar[i]; i++)
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{
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if (AcpiNsValidPathSeparator (NextExternalChar[i]))
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{
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Info->NumSegments++;
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}
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}
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}
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Info->Length = (ACPI_NAME_SIZE * Info->NumSegments) +
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4 + Info->NumCarats;
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Info->NextExternalChar = NextExternalChar;
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}
|
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|
|
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsBuildInternalName
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*
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* PARAMETERS: Info - Info struct fully initialized
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*
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* RETURN: Status
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*
|
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* DESCRIPTION: Construct the internal (AML) namestring
|
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* corresponding to the external (ASL) namestring.
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*
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******************************************************************************/
|
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ACPI_STATUS
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AcpiNsBuildInternalName (
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ACPI_NAMESTRING_INFO *Info)
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{
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UINT32 NumSegments = Info->NumSegments;
|
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char *InternalName = Info->InternalName;
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const char *ExternalName = Info->NextExternalChar;
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char *Result = NULL;
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UINT32 i;
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|
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ACPI_FUNCTION_TRACE (NsBuildInternalName);
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|
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/* Setup the correct prefixes, counts, and pointers */
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if (Info->FullyQualified)
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{
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InternalName[0] = '\\';
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|
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if (NumSegments <= 1)
|
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{
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Result = &InternalName[1];
|
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}
|
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else if (NumSegments == 2)
|
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{
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InternalName[1] = AML_DUAL_NAME_PREFIX;
|
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Result = &InternalName[2];
|
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}
|
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else
|
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{
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InternalName[1] = AML_MULTI_NAME_PREFIX_OP;
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InternalName[2] = (char) NumSegments;
|
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Result = &InternalName[3];
|
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}
|
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}
|
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else
|
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{
|
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/*
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* Not fully qualified.
|
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* Handle Carats first, then append the name segments
|
|
*/
|
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i = 0;
|
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if (Info->NumCarats)
|
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{
|
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for (i = 0; i < Info->NumCarats; i++)
|
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{
|
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InternalName[i] = '^';
|
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}
|
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}
|
|
|
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if (NumSegments <= 1)
|
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{
|
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Result = &InternalName[i];
|
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}
|
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else if (NumSegments == 2)
|
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{
|
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InternalName[i] = AML_DUAL_NAME_PREFIX;
|
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Result = &InternalName[(ACPI_SIZE) i+1];
|
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}
|
|
else
|
|
{
|
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InternalName[i] = AML_MULTI_NAME_PREFIX_OP;
|
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InternalName[(ACPI_SIZE) i+1] = (char) NumSegments;
|
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Result = &InternalName[(ACPI_SIZE) i+2];
|
|
}
|
|
}
|
|
|
|
/* Build the name (minus path separators) */
|
|
|
|
for (; NumSegments; NumSegments--)
|
|
{
|
|
for (i = 0; i < ACPI_NAME_SIZE; i++)
|
|
{
|
|
if (AcpiNsValidPathSeparator (*ExternalName) ||
|
|
(*ExternalName == 0))
|
|
{
|
|
/* Pad the segment with underscore(s) if segment is short */
|
|
|
|
Result[i] = '_';
|
|
}
|
|
else
|
|
{
|
|
/* Convert the character to uppercase and save it */
|
|
|
|
Result[i] = (char) ACPI_TOUPPER ((int) *ExternalName);
|
|
ExternalName++;
|
|
}
|
|
}
|
|
|
|
/* Now we must have a path separator, or the pathname is bad */
|
|
|
|
if (!AcpiNsValidPathSeparator (*ExternalName) &&
|
|
(*ExternalName != 0))
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Move on the next segment */
|
|
|
|
ExternalName++;
|
|
Result += ACPI_NAME_SIZE;
|
|
}
|
|
|
|
/* Terminate the string */
|
|
|
|
*Result = 0;
|
|
|
|
if (Info->FullyQualified)
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Returning [%p] (abs) \"\\%s\"\n",
|
|
InternalName, InternalName));
|
|
}
|
|
else
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Returning [%p] (rel) \"%s\"\n",
|
|
InternalName, InternalName));
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsInternalizeName
|
|
*
|
|
* PARAMETERS: *ExternalName - External representation of name
|
|
* **Converted Name - Where to return the resulting
|
|
* internal represention of the name
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Convert an external representation (e.g. "\_PR_.CPU0")
|
|
* to internal form (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30)
|
|
*
|
|
*******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiNsInternalizeName (
|
|
const char *ExternalName,
|
|
char **ConvertedName)
|
|
{
|
|
char *InternalName;
|
|
ACPI_NAMESTRING_INFO Info;
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (NsInternalizeName);
|
|
|
|
|
|
if ((!ExternalName) ||
|
|
(*ExternalName == 0) ||
|
|
(!ConvertedName))
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Get the length of the new internal name */
|
|
|
|
Info.ExternalName = ExternalName;
|
|
AcpiNsGetInternalNameLength (&Info);
|
|
|
|
/* We need a segment to store the internal name */
|
|
|
|
InternalName = ACPI_ALLOCATE_ZEROED (Info.Length);
|
|
if (!InternalName)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
|
|
/* Build the name */
|
|
|
|
Info.InternalName = InternalName;
|
|
Status = AcpiNsBuildInternalName (&Info);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_FREE (InternalName);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
*ConvertedName = InternalName;
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsExternalizeName
|
|
*
|
|
* PARAMETERS: InternalNameLength - Lenth of the internal name below
|
|
* InternalName - Internal representation of name
|
|
* ConvertedNameLength - Where the length is returned
|
|
* ConvertedName - Where the resulting external name
|
|
* is returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Convert internal name (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30)
|
|
* to its external (printable) form (e.g. "\_PR_.CPU0")
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiNsExternalizeName (
|
|
UINT32 InternalNameLength,
|
|
const char *InternalName,
|
|
UINT32 *ConvertedNameLength,
|
|
char **ConvertedName)
|
|
{
|
|
UINT32 NamesIndex = 0;
|
|
UINT32 NumSegments = 0;
|
|
UINT32 RequiredLength;
|
|
UINT32 PrefixLength = 0;
|
|
UINT32 i = 0;
|
|
UINT32 j = 0;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (NsExternalizeName);
|
|
|
|
|
|
if (!InternalNameLength ||
|
|
!InternalName ||
|
|
!ConvertedName)
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Check for a prefix (one '\' | one or more '^') */
|
|
|
|
switch (InternalName[0])
|
|
{
|
|
case '\\':
|
|
PrefixLength = 1;
|
|
break;
|
|
|
|
case '^':
|
|
for (i = 0; i < InternalNameLength; i++)
|
|
{
|
|
if (InternalName[i] == '^')
|
|
{
|
|
PrefixLength = i + 1;
|
|
}
|
|
else
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (i == InternalNameLength)
|
|
{
|
|
PrefixLength = i;
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Check for object names. Note that there could be 0-255 of these
|
|
* 4-byte elements.
|
|
*/
|
|
if (PrefixLength < InternalNameLength)
|
|
{
|
|
switch (InternalName[PrefixLength])
|
|
{
|
|
case AML_MULTI_NAME_PREFIX_OP:
|
|
|
|
/* <count> 4-byte names */
|
|
|
|
NamesIndex = PrefixLength + 2;
|
|
NumSegments = (UINT8)
|
|
InternalName[(ACPI_SIZE) PrefixLength + 1];
|
|
break;
|
|
|
|
case AML_DUAL_NAME_PREFIX:
|
|
|
|
/* Two 4-byte names */
|
|
|
|
NamesIndex = PrefixLength + 1;
|
|
NumSegments = 2;
|
|
break;
|
|
|
|
case 0:
|
|
|
|
/* NullName */
|
|
|
|
NamesIndex = 0;
|
|
NumSegments = 0;
|
|
break;
|
|
|
|
default:
|
|
|
|
/* one 4-byte name */
|
|
|
|
NamesIndex = PrefixLength;
|
|
NumSegments = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Calculate the length of ConvertedName, which equals the length
|
|
* of the prefix, length of all object names, length of any required
|
|
* punctuation ('.') between object names, plus the NULL terminator.
|
|
*/
|
|
RequiredLength = PrefixLength + (4 * NumSegments) +
|
|
((NumSegments > 0) ? (NumSegments - 1) : 0) + 1;
|
|
|
|
/*
|
|
* Check to see if we're still in bounds. If not, there's a problem
|
|
* with InternalName (invalid format).
|
|
*/
|
|
if (RequiredLength > InternalNameLength)
|
|
{
|
|
ACPI_ERROR ((AE_INFO, "Invalid internal name"));
|
|
return_ACPI_STATUS (AE_BAD_PATHNAME);
|
|
}
|
|
|
|
/* Build the ConvertedName */
|
|
|
|
*ConvertedName = ACPI_ALLOCATE_ZEROED (RequiredLength);
|
|
if (!(*ConvertedName))
|
|
{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
|
|
j = 0;
|
|
|
|
for (i = 0; i < PrefixLength; i++)
|
|
{
|
|
(*ConvertedName)[j++] = InternalName[i];
|
|
}
|
|
|
|
if (NumSegments > 0)
|
|
{
|
|
for (i = 0; i < NumSegments; i++)
|
|
{
|
|
if (i > 0)
|
|
{
|
|
(*ConvertedName)[j++] = '.';
|
|
}
|
|
|
|
(*ConvertedName)[j++] = InternalName[NamesIndex++];
|
|
(*ConvertedName)[j++] = InternalName[NamesIndex++];
|
|
(*ConvertedName)[j++] = InternalName[NamesIndex++];
|
|
(*ConvertedName)[j++] = InternalName[NamesIndex++];
|
|
}
|
|
}
|
|
|
|
if (ConvertedNameLength)
|
|
{
|
|
*ConvertedNameLength = (UINT32) RequiredLength;
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsValidateHandle
|
|
*
|
|
* PARAMETERS: Handle - Handle to be validated and typecast to a
|
|
* namespace node.
|
|
*
|
|
* RETURN: A pointer to a namespace node
|
|
*
|
|
* DESCRIPTION: Convert a namespace handle to a namespace node. Handles special
|
|
* cases for the root node.
|
|
*
|
|
* NOTE: Real integer handles would allow for more verification
|
|
* and keep all pointers within this subsystem - however this introduces
|
|
* more overhead and has not been necessary to this point. Drivers
|
|
* holding handles are typically notified before a node becomes invalid
|
|
* due to a table unload.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_NAMESPACE_NODE *
|
|
AcpiNsValidateHandle (
|
|
ACPI_HANDLE Handle)
|
|
{
|
|
|
|
ACPI_FUNCTION_ENTRY ();
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
if ((!Handle) || (Handle == ACPI_ROOT_OBJECT))
|
|
{
|
|
return (AcpiGbl_RootNode);
|
|
}
|
|
|
|
/* We can at least attempt to verify the handle */
|
|
|
|
if (ACPI_GET_DESCRIPTOR_TYPE (Handle) != ACPI_DESC_TYPE_NAMED)
|
|
{
|
|
return (NULL);
|
|
}
|
|
|
|
return (ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Handle));
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsTerminate
|
|
*
|
|
* PARAMETERS: none
|
|
*
|
|
* RETURN: none
|
|
*
|
|
* DESCRIPTION: free memory allocated for namespace and ACPI table storage.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
AcpiNsTerminate (
|
|
void)
|
|
{
|
|
ACPI_OPERAND_OBJECT *ObjDesc;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (NsTerminate);
|
|
|
|
|
|
/*
|
|
* 1) Free the entire namespace -- all nodes and objects
|
|
*
|
|
* Delete all object descriptors attached to namepsace nodes
|
|
*/
|
|
AcpiNsDeleteNamespaceSubtree (AcpiGbl_RootNode);
|
|
|
|
/* Detach any objects attached to the root */
|
|
|
|
ObjDesc = AcpiNsGetAttachedObject (AcpiGbl_RootNode);
|
|
if (ObjDesc)
|
|
{
|
|
AcpiNsDetachObject (AcpiGbl_RootNode);
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Namespace freed\n"));
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsOpensScope
|
|
*
|
|
* PARAMETERS: Type - A valid namespace type
|
|
*
|
|
* RETURN: NEWSCOPE if the passed type "opens a name scope" according
|
|
* to the ACPI specification, else 0
|
|
*
|
|
******************************************************************************/
|
|
|
|
UINT32
|
|
AcpiNsOpensScope (
|
|
ACPI_OBJECT_TYPE Type)
|
|
{
|
|
ACPI_FUNCTION_TRACE_STR (NsOpensScope, AcpiUtGetTypeName (Type));
|
|
|
|
|
|
if (!AcpiUtValidObjectType (Type))
|
|
{
|
|
/* type code out of range */
|
|
|
|
ACPI_WARNING ((AE_INFO, "Invalid Object Type 0x%X", Type));
|
|
return_UINT32 (ACPI_NS_NORMAL);
|
|
}
|
|
|
|
return_UINT32 (((UINT32) AcpiGbl_NsProperties[Type]) & ACPI_NS_NEWSCOPE);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsGetNode
|
|
*
|
|
* PARAMETERS: *Pathname - Name to be found, in external (ASL) format. The
|
|
* \ (backslash) and ^ (carat) prefixes, and the
|
|
* . (period) to separate segments are supported.
|
|
* PrefixNode - Root of subtree to be searched, or NS_ALL for the
|
|
* root of the name space. If Name is fully
|
|
* qualified (first INT8 is '\'), the passed value
|
|
* of Scope will not be accessed.
|
|
* Flags - Used to indicate whether to perform upsearch or
|
|
* not.
|
|
* ReturnNode - Where the Node is returned
|
|
*
|
|
* DESCRIPTION: Look up a name relative to a given scope and return the
|
|
* corresponding Node. NOTE: Scope can be null.
|
|
*
|
|
* MUTEX: Locks namespace
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiNsGetNode (
|
|
ACPI_NAMESPACE_NODE *PrefixNode,
|
|
const char *Pathname,
|
|
UINT32 Flags,
|
|
ACPI_NAMESPACE_NODE **ReturnNode)
|
|
{
|
|
ACPI_GENERIC_STATE ScopeInfo;
|
|
ACPI_STATUS Status;
|
|
char *InternalPath;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR (NsGetNode, ACPI_CAST_PTR (char, Pathname));
|
|
|
|
|
|
if (!Pathname)
|
|
{
|
|
*ReturnNode = PrefixNode;
|
|
if (!PrefixNode)
|
|
{
|
|
*ReturnNode = AcpiGbl_RootNode;
|
|
}
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
/* Convert path to internal representation */
|
|
|
|
Status = AcpiNsInternalizeName (Pathname, &InternalPath);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Must lock namespace during lookup */
|
|
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto Cleanup;
|
|
}
|
|
|
|
/* Setup lookup scope (search starting point) */
|
|
|
|
ScopeInfo.Scope.Node = PrefixNode;
|
|
|
|
/* Lookup the name in the namespace */
|
|
|
|
Status = AcpiNsLookup (&ScopeInfo, InternalPath, ACPI_TYPE_ANY,
|
|
ACPI_IMODE_EXECUTE, (Flags | ACPI_NS_DONT_OPEN_SCOPE),
|
|
NULL, ReturnNode);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "%s, %s\n",
|
|
Pathname, AcpiFormatException (Status)));
|
|
}
|
|
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
|
|
Cleanup:
|
|
ACPI_FREE (InternalPath);
|
|
return_ACPI_STATUS (Status);
|
|
}
|