10d02842fSSascha Wildner /******************************************************************************
20d02842fSSascha Wildner *
30d02842fSSascha Wildner * Module Name: nsload - namespace loading/expanding/contracting procedures
40d02842fSSascha Wildner *
50d02842fSSascha Wildner *****************************************************************************/
60d02842fSSascha Wildner
7b4315fc7SSascha Wildner /******************************************************************************
8b4315fc7SSascha Wildner *
9b4315fc7SSascha Wildner * 1. Copyright Notice
10b4315fc7SSascha Wildner *
11*383048acSSascha Wildner * Some or all of this work - Copyright (c) 1999 - 2021, Intel Corp.
120d02842fSSascha Wildner * All rights reserved.
130d02842fSSascha Wildner *
14b4315fc7SSascha Wildner * 2. License
15b4315fc7SSascha Wildner *
16b4315fc7SSascha Wildner * 2.1. This is your license from Intel Corp. under its intellectual property
17b4315fc7SSascha Wildner * rights. You may have additional license terms from the party that provided
18b4315fc7SSascha Wildner * you this software, covering your right to use that party's intellectual
19b4315fc7SSascha Wildner * property rights.
20b4315fc7SSascha Wildner *
21b4315fc7SSascha Wildner * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22b4315fc7SSascha Wildner * copy of the source code appearing in this file ("Covered Code") an
23b4315fc7SSascha Wildner * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24b4315fc7SSascha Wildner * base code distributed originally by Intel ("Original Intel Code") to copy,
25b4315fc7SSascha Wildner * make derivatives, distribute, use and display any portion of the Covered
26b4315fc7SSascha Wildner * Code in any form, with the right to sublicense such rights; and
27b4315fc7SSascha Wildner *
28b4315fc7SSascha Wildner * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29b4315fc7SSascha Wildner * license (with the right to sublicense), under only those claims of Intel
30b4315fc7SSascha Wildner * patents that are infringed by the Original Intel Code, to make, use, sell,
31b4315fc7SSascha Wildner * offer to sell, and import the Covered Code and derivative works thereof
32b4315fc7SSascha Wildner * solely to the minimum extent necessary to exercise the above copyright
33b4315fc7SSascha Wildner * license, and in no event shall the patent license extend to any additions
34b4315fc7SSascha Wildner * to or modifications of the Original Intel Code. No other license or right
35b4315fc7SSascha Wildner * is granted directly or by implication, estoppel or otherwise;
36b4315fc7SSascha Wildner *
37b4315fc7SSascha Wildner * The above copyright and patent license is granted only if the following
38b4315fc7SSascha Wildner * conditions are met:
39b4315fc7SSascha Wildner *
40b4315fc7SSascha Wildner * 3. Conditions
41b4315fc7SSascha Wildner *
42b4315fc7SSascha Wildner * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43b4315fc7SSascha Wildner * Redistribution of source code of any substantial portion of the Covered
44b4315fc7SSascha Wildner * Code or modification with rights to further distribute source must include
45b4315fc7SSascha Wildner * the above Copyright Notice, the above License, this list of Conditions,
46b4315fc7SSascha Wildner * and the following Disclaimer and Export Compliance provision. In addition,
47b4315fc7SSascha Wildner * Licensee must cause all Covered Code to which Licensee contributes to
48b4315fc7SSascha Wildner * contain a file documenting the changes Licensee made to create that Covered
49b4315fc7SSascha Wildner * Code and the date of any change. Licensee must include in that file the
50b4315fc7SSascha Wildner * documentation of any changes made by any predecessor Licensee. Licensee
51b4315fc7SSascha Wildner * must include a prominent statement that the modification is derived,
52b4315fc7SSascha Wildner * directly or indirectly, from Original Intel Code.
53b4315fc7SSascha Wildner *
54b4315fc7SSascha Wildner * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55b4315fc7SSascha Wildner * Redistribution of source code of any substantial portion of the Covered
56b4315fc7SSascha Wildner * Code or modification without rights to further distribute source must
57b4315fc7SSascha Wildner * include the following Disclaimer and Export Compliance provision in the
58b4315fc7SSascha Wildner * documentation and/or other materials provided with distribution. In
59b4315fc7SSascha Wildner * addition, Licensee may not authorize further sublicense of source of any
60b4315fc7SSascha Wildner * portion of the Covered Code, and must include terms to the effect that the
61b4315fc7SSascha Wildner * license from Licensee to its licensee is limited to the intellectual
62b4315fc7SSascha Wildner * property embodied in the software Licensee provides to its licensee, and
63b4315fc7SSascha Wildner * not to intellectual property embodied in modifications its licensee may
64b4315fc7SSascha Wildner * make.
65b4315fc7SSascha Wildner *
66b4315fc7SSascha Wildner * 3.3. Redistribution of Executable. Redistribution in executable form of any
67b4315fc7SSascha Wildner * substantial portion of the Covered Code or modification must reproduce the
68b4315fc7SSascha Wildner * above Copyright Notice, and the following Disclaimer and Export Compliance
69b4315fc7SSascha Wildner * provision in the documentation and/or other materials provided with the
70b4315fc7SSascha Wildner * distribution.
71b4315fc7SSascha Wildner *
72b4315fc7SSascha Wildner * 3.4. Intel retains all right, title, and interest in and to the Original
73b4315fc7SSascha Wildner * Intel Code.
74b4315fc7SSascha Wildner *
75b4315fc7SSascha Wildner * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76b4315fc7SSascha Wildner * Intel shall be used in advertising or otherwise to promote the sale, use or
77b4315fc7SSascha Wildner * other dealings in products derived from or relating to the Covered Code
78b4315fc7SSascha Wildner * without prior written authorization from Intel.
79b4315fc7SSascha Wildner *
80b4315fc7SSascha Wildner * 4. Disclaimer and Export Compliance
81b4315fc7SSascha Wildner *
82b4315fc7SSascha Wildner * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83b4315fc7SSascha Wildner * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84b4315fc7SSascha Wildner * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85b4315fc7SSascha Wildner * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86b4315fc7SSascha Wildner * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87b4315fc7SSascha Wildner * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
88b4315fc7SSascha Wildner * PARTICULAR PURPOSE.
89b4315fc7SSascha Wildner *
90b4315fc7SSascha Wildner * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91b4315fc7SSascha Wildner * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92b4315fc7SSascha Wildner * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93b4315fc7SSascha Wildner * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94b4315fc7SSascha Wildner * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95b4315fc7SSascha Wildner * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96b4315fc7SSascha Wildner * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
97b4315fc7SSascha Wildner * LIMITED REMEDY.
98b4315fc7SSascha Wildner *
99b4315fc7SSascha Wildner * 4.3. Licensee shall not export, either directly or indirectly, any of this
100b4315fc7SSascha Wildner * software or system incorporating such software without first obtaining any
101b4315fc7SSascha Wildner * required license or other approval from the U. S. Department of Commerce or
102b4315fc7SSascha Wildner * any other agency or department of the United States Government. In the
103b4315fc7SSascha Wildner * event Licensee exports any such software from the United States or
104b4315fc7SSascha Wildner * re-exports any such software from a foreign destination, Licensee shall
105b4315fc7SSascha Wildner * ensure that the distribution and export/re-export of the software is in
106b4315fc7SSascha Wildner * compliance with all laws, regulations, orders, or other restrictions of the
107b4315fc7SSascha Wildner * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108b4315fc7SSascha Wildner * any of its subsidiaries will export/re-export any technical data, process,
109b4315fc7SSascha Wildner * software, or service, directly or indirectly, to any country for which the
110b4315fc7SSascha Wildner * United States government or any agency thereof requires an export license,
111b4315fc7SSascha Wildner * other governmental approval, or letter of assurance, without first obtaining
112b4315fc7SSascha Wildner * such license, approval or letter.
113b4315fc7SSascha Wildner *
114b4315fc7SSascha Wildner *****************************************************************************
115b4315fc7SSascha Wildner *
116b4315fc7SSascha Wildner * Alternatively, you may choose to be licensed under the terms of the
117b4315fc7SSascha Wildner * following license:
118b4315fc7SSascha Wildner *
1190d02842fSSascha Wildner * Redistribution and use in source and binary forms, with or without
1200d02842fSSascha Wildner * modification, are permitted provided that the following conditions
1210d02842fSSascha Wildner * are met:
1220d02842fSSascha Wildner * 1. Redistributions of source code must retain the above copyright
1230d02842fSSascha Wildner * notice, this list of conditions, and the following disclaimer,
1240d02842fSSascha Wildner * without modification.
1250d02842fSSascha Wildner * 2. Redistributions in binary form must reproduce at minimum a disclaimer
1260d02842fSSascha Wildner * substantially similar to the "NO WARRANTY" disclaimer below
1270d02842fSSascha Wildner * ("Disclaimer") and any redistribution must be conditioned upon
1280d02842fSSascha Wildner * including a substantially similar Disclaimer requirement for further
1290d02842fSSascha Wildner * binary redistribution.
1300d02842fSSascha Wildner * 3. Neither the names of the above-listed copyright holders nor the names
1310d02842fSSascha Wildner * of any contributors may be used to endorse or promote products derived
1320d02842fSSascha Wildner * from this software without specific prior written permission.
1330d02842fSSascha Wildner *
134b4315fc7SSascha Wildner * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
135b4315fc7SSascha Wildner * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136b4315fc7SSascha Wildner * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
137b4315fc7SSascha Wildner * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138b4315fc7SSascha Wildner * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139b4315fc7SSascha Wildner * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140b4315fc7SSascha Wildner * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141b4315fc7SSascha Wildner * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142b4315fc7SSascha Wildner * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143b4315fc7SSascha Wildner * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144b4315fc7SSascha Wildner * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
145b4315fc7SSascha Wildner *
146b4315fc7SSascha Wildner * Alternatively, you may choose to be licensed under the terms of the
1470d02842fSSascha Wildner * GNU General Public License ("GPL") version 2 as published by the Free
1480d02842fSSascha Wildner * Software Foundation.
1490d02842fSSascha Wildner *
150b4315fc7SSascha Wildner *****************************************************************************/
1510d02842fSSascha Wildner
1520d02842fSSascha Wildner #include "acpi.h"
1530d02842fSSascha Wildner #include "accommon.h"
1540d02842fSSascha Wildner #include "acnamesp.h"
1550d02842fSSascha Wildner #include "acdispat.h"
1560d02842fSSascha Wildner #include "actables.h"
157e5e174adSSascha Wildner #include "acinterp.h"
1580d02842fSSascha Wildner
1590d02842fSSascha Wildner
1600d02842fSSascha Wildner #define _COMPONENT ACPI_NAMESPACE
1610d02842fSSascha Wildner ACPI_MODULE_NAME ("nsload")
1620d02842fSSascha Wildner
1630d02842fSSascha Wildner /* Local prototypes */
1640d02842fSSascha Wildner
1650d02842fSSascha Wildner #ifdef ACPI_FUTURE_IMPLEMENTATION
1660d02842fSSascha Wildner ACPI_STATUS
1670d02842fSSascha Wildner AcpiNsUnloadNamespace (
1680d02842fSSascha Wildner ACPI_HANDLE Handle);
1690d02842fSSascha Wildner
1700d02842fSSascha Wildner static ACPI_STATUS
1710d02842fSSascha Wildner AcpiNsDeleteSubtree (
1720d02842fSSascha Wildner ACPI_HANDLE StartHandle);
1730d02842fSSascha Wildner #endif
1740d02842fSSascha Wildner
1750d02842fSSascha Wildner
1760d02842fSSascha Wildner /*******************************************************************************
1770d02842fSSascha Wildner *
1780d02842fSSascha Wildner * FUNCTION: AcpiNsLoadTable
1790d02842fSSascha Wildner *
1800d02842fSSascha Wildner * PARAMETERS: TableIndex - Index for table to be loaded
1810d02842fSSascha Wildner * Node - Owning NS node
1820d02842fSSascha Wildner *
1830d02842fSSascha Wildner * RETURN: Status
1840d02842fSSascha Wildner *
1850d02842fSSascha Wildner * DESCRIPTION: Load one ACPI table into the namespace
1860d02842fSSascha Wildner *
1870d02842fSSascha Wildner ******************************************************************************/
1880d02842fSSascha Wildner
1890d02842fSSascha Wildner ACPI_STATUS
AcpiNsLoadTable(UINT32 TableIndex,ACPI_NAMESPACE_NODE * Node)1900d02842fSSascha Wildner AcpiNsLoadTable (
1910d02842fSSascha Wildner UINT32 TableIndex,
1920d02842fSSascha Wildner ACPI_NAMESPACE_NODE *Node)
1930d02842fSSascha Wildner {
1940d02842fSSascha Wildner ACPI_STATUS Status;
1950d02842fSSascha Wildner
1960d02842fSSascha Wildner
1970d02842fSSascha Wildner ACPI_FUNCTION_TRACE (NsLoadTable);
1980d02842fSSascha Wildner
1990d02842fSSascha Wildner
2000d02842fSSascha Wildner /* If table already loaded into namespace, just return */
2010d02842fSSascha Wildner
2020d02842fSSascha Wildner if (AcpiTbIsTableLoaded (TableIndex))
2030d02842fSSascha Wildner {
2040d02842fSSascha Wildner Status = AE_ALREADY_EXISTS;
2050d02842fSSascha Wildner goto Unlock;
2060d02842fSSascha Wildner }
2070d02842fSSascha Wildner
2080d02842fSSascha Wildner ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
2090d02842fSSascha Wildner "**** Loading table into namespace ****\n"));
2100d02842fSSascha Wildner
2110d02842fSSascha Wildner Status = AcpiTbAllocateOwnerId (TableIndex);
2120d02842fSSascha Wildner if (ACPI_FAILURE (Status))
2130d02842fSSascha Wildner {
2140d02842fSSascha Wildner goto Unlock;
2150d02842fSSascha Wildner }
2160d02842fSSascha Wildner
217e5e174adSSascha Wildner /*
218e5e174adSSascha Wildner * Parse the table and load the namespace with all named
219e5e174adSSascha Wildner * objects found within. Control methods are NOT parsed
220e5e174adSSascha Wildner * at this time. In fact, the control methods cannot be
221e5e174adSSascha Wildner * parsed until the entire namespace is loaded, because
222e5e174adSSascha Wildner * if a control method makes a forward reference (call)
223e5e174adSSascha Wildner * to another control method, we can't continue parsing
224e5e174adSSascha Wildner * because we don't know how many arguments to parse next!
225e5e174adSSascha Wildner */
2260d02842fSSascha Wildner Status = AcpiNsParseTable (TableIndex, Node);
2270d02842fSSascha Wildner if (ACPI_SUCCESS (Status))
2280d02842fSSascha Wildner {
2290d02842fSSascha Wildner AcpiTbSetTableLoadedFlag (TableIndex, TRUE);
2300d02842fSSascha Wildner }
2310d02842fSSascha Wildner else
2320d02842fSSascha Wildner {
2333cc0afc6SSascha Wildner /*
2343cc0afc6SSascha Wildner * On error, delete any namespace objects created by this table.
2353cc0afc6SSascha Wildner * We cannot initialize these objects, so delete them. There are
23600ffa116SSascha Wildner * a couple of especially bad cases:
2373cc0afc6SSascha Wildner * AE_ALREADY_EXISTS - namespace collision.
2383cc0afc6SSascha Wildner * AE_NOT_FOUND - the target of a Scope operator does not
2393cc0afc6SSascha Wildner * exist. This target of Scope must already exist in the
2403cc0afc6SSascha Wildner * namespace, as per the ACPI specification.
2413cc0afc6SSascha Wildner */
2423cc0afc6SSascha Wildner AcpiNsDeleteNamespaceByOwner (
2433cc0afc6SSascha Wildner AcpiGbl_RootTableList.Tables[TableIndex].OwnerId);
244dbd7d990SSascha Wildner
2452ffe9f16SSascha Wildner AcpiTbReleaseOwnerId (TableIndex);
2463cc0afc6SSascha Wildner return_ACPI_STATUS (Status);
2470d02842fSSascha Wildner }
2480d02842fSSascha Wildner
2490d02842fSSascha Wildner Unlock:
2500d02842fSSascha Wildner if (ACPI_FAILURE (Status))
2510d02842fSSascha Wildner {
2520d02842fSSascha Wildner return_ACPI_STATUS (Status);
2530d02842fSSascha Wildner }
2540d02842fSSascha Wildner
2550d02842fSSascha Wildner /*
2560d02842fSSascha Wildner * Now we can parse the control methods. We always parse
2570d02842fSSascha Wildner * them here for a sanity check, and if configured for
2580d02842fSSascha Wildner * just-in-time parsing, we delete the control method
2590d02842fSSascha Wildner * parse trees.
2600d02842fSSascha Wildner */
2610d02842fSSascha Wildner ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
2626a0135c2SSascha Wildner "**** Begin Table Object Initialization\n"));
2630d02842fSSascha Wildner
264a96e04f2SSascha Wildner AcpiExEnterInterpreter ();
2650d02842fSSascha Wildner Status = AcpiDsInitializeObjects (TableIndex, Node);
266a96e04f2SSascha Wildner AcpiExExitInterpreter ();
2670d02842fSSascha Wildner
2680d02842fSSascha Wildner ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
2696a0135c2SSascha Wildner "**** Completed Table Object Initialization\n"));
2700d02842fSSascha Wildner
2710d02842fSSascha Wildner return_ACPI_STATUS (Status);
2720d02842fSSascha Wildner }
2730d02842fSSascha Wildner
2740d02842fSSascha Wildner
2750d02842fSSascha Wildner #ifdef ACPI_OBSOLETE_FUNCTIONS
2760d02842fSSascha Wildner /*******************************************************************************
2770d02842fSSascha Wildner *
2780d02842fSSascha Wildner * FUNCTION: AcpiLoadNamespace
2790d02842fSSascha Wildner *
2800d02842fSSascha Wildner * PARAMETERS: None
2810d02842fSSascha Wildner *
2820d02842fSSascha Wildner * RETURN: Status
2830d02842fSSascha Wildner *
2840d02842fSSascha Wildner * DESCRIPTION: Load the name space from what ever is pointed to by DSDT.
2850d02842fSSascha Wildner * (DSDT points to either the BIOS or a buffer.)
2860d02842fSSascha Wildner *
2870d02842fSSascha Wildner ******************************************************************************/
2880d02842fSSascha Wildner
2890d02842fSSascha Wildner ACPI_STATUS
AcpiNsLoadNamespace(void)2900d02842fSSascha Wildner AcpiNsLoadNamespace (
2910d02842fSSascha Wildner void)
2920d02842fSSascha Wildner {
2930d02842fSSascha Wildner ACPI_STATUS Status;
2940d02842fSSascha Wildner
2950d02842fSSascha Wildner
2960d02842fSSascha Wildner ACPI_FUNCTION_TRACE (AcpiLoadNameSpace);
2970d02842fSSascha Wildner
2980d02842fSSascha Wildner
2990d02842fSSascha Wildner /* There must be at least a DSDT installed */
3000d02842fSSascha Wildner
3010d02842fSSascha Wildner if (AcpiGbl_DSDT == NULL)
3020d02842fSSascha Wildner {
3030d02842fSSascha Wildner ACPI_ERROR ((AE_INFO, "DSDT is not in memory"));
3040d02842fSSascha Wildner return_ACPI_STATUS (AE_NO_ACPI_TABLES);
3050d02842fSSascha Wildner }
3060d02842fSSascha Wildner
3070d02842fSSascha Wildner /*
3080d02842fSSascha Wildner * Load the namespace. The DSDT is required,
3090d02842fSSascha Wildner * but the SSDT and PSDT tables are optional.
3100d02842fSSascha Wildner */
3110d02842fSSascha Wildner Status = AcpiNsLoadTableByType (ACPI_TABLE_ID_DSDT);
3120d02842fSSascha Wildner if (ACPI_FAILURE (Status))
3130d02842fSSascha Wildner {
3140d02842fSSascha Wildner return_ACPI_STATUS (Status);
3150d02842fSSascha Wildner }
3160d02842fSSascha Wildner
3170d02842fSSascha Wildner /* Ignore exceptions from these */
3180d02842fSSascha Wildner
3190d02842fSSascha Wildner (void) AcpiNsLoadTableByType (ACPI_TABLE_ID_SSDT);
3200d02842fSSascha Wildner (void) AcpiNsLoadTableByType (ACPI_TABLE_ID_PSDT);
3210d02842fSSascha Wildner
3220d02842fSSascha Wildner ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
3230d02842fSSascha Wildner "ACPI Namespace successfully loaded at root %p\n",
3240d02842fSSascha Wildner AcpiGbl_RootNode));
3250d02842fSSascha Wildner
3260d02842fSSascha Wildner return_ACPI_STATUS (Status);
3270d02842fSSascha Wildner }
3280d02842fSSascha Wildner #endif
3290d02842fSSascha Wildner
3300d02842fSSascha Wildner #ifdef ACPI_FUTURE_IMPLEMENTATION
3310d02842fSSascha Wildner /*******************************************************************************
3320d02842fSSascha Wildner *
3330d02842fSSascha Wildner * FUNCTION: AcpiNsDeleteSubtree
3340d02842fSSascha Wildner *
3350d02842fSSascha Wildner * PARAMETERS: StartHandle - Handle in namespace where search begins
3360d02842fSSascha Wildner *
3370d02842fSSascha Wildner * RETURNS Status
3380d02842fSSascha Wildner *
3390d02842fSSascha Wildner * DESCRIPTION: Walks the namespace starting at the given handle and deletes
3400d02842fSSascha Wildner * all objects, entries, and scopes in the entire subtree.
3410d02842fSSascha Wildner *
3420d02842fSSascha Wildner * Namespace/Interpreter should be locked or the subsystem should
3430d02842fSSascha Wildner * be in shutdown before this routine is called.
3440d02842fSSascha Wildner *
3450d02842fSSascha Wildner ******************************************************************************/
3460d02842fSSascha Wildner
3470d02842fSSascha Wildner static ACPI_STATUS
AcpiNsDeleteSubtree(ACPI_HANDLE StartHandle)3480d02842fSSascha Wildner AcpiNsDeleteSubtree (
3490d02842fSSascha Wildner ACPI_HANDLE StartHandle)
3500d02842fSSascha Wildner {
3510d02842fSSascha Wildner ACPI_STATUS Status;
3520d02842fSSascha Wildner ACPI_HANDLE ChildHandle;
3530d02842fSSascha Wildner ACPI_HANDLE ParentHandle;
3540d02842fSSascha Wildner ACPI_HANDLE NextChildHandle;
3550d02842fSSascha Wildner ACPI_HANDLE Dummy;
3560d02842fSSascha Wildner UINT32 Level;
3570d02842fSSascha Wildner
3580d02842fSSascha Wildner
3590d02842fSSascha Wildner ACPI_FUNCTION_TRACE (NsDeleteSubtree);
3600d02842fSSascha Wildner
3610d02842fSSascha Wildner
3620d02842fSSascha Wildner ParentHandle = StartHandle;
3630d02842fSSascha Wildner ChildHandle = NULL;
3640d02842fSSascha Wildner Level = 1;
3650d02842fSSascha Wildner
3660d02842fSSascha Wildner /*
3670d02842fSSascha Wildner * Traverse the tree of objects until we bubble back up
3680d02842fSSascha Wildner * to where we started.
3690d02842fSSascha Wildner */
3700d02842fSSascha Wildner while (Level > 0)
3710d02842fSSascha Wildner {
3720d02842fSSascha Wildner /* Attempt to get the next object in this scope */
3730d02842fSSascha Wildner
3740d02842fSSascha Wildner Status = AcpiGetNextObject (ACPI_TYPE_ANY, ParentHandle,
3750d02842fSSascha Wildner ChildHandle, &NextChildHandle);
3760d02842fSSascha Wildner
3770d02842fSSascha Wildner ChildHandle = NextChildHandle;
3780d02842fSSascha Wildner
3790d02842fSSascha Wildner /* Did we get a new object? */
3800d02842fSSascha Wildner
3810d02842fSSascha Wildner if (ACPI_SUCCESS (Status))
3820d02842fSSascha Wildner {
3830d02842fSSascha Wildner /* Check if this object has any children */
3840d02842fSSascha Wildner
3850d02842fSSascha Wildner if (ACPI_SUCCESS (AcpiGetNextObject (ACPI_TYPE_ANY, ChildHandle,
3860d02842fSSascha Wildner NULL, &Dummy)))
3870d02842fSSascha Wildner {
3880d02842fSSascha Wildner /*
3890d02842fSSascha Wildner * There is at least one child of this object,
3900d02842fSSascha Wildner * visit the object
3910d02842fSSascha Wildner */
3920d02842fSSascha Wildner Level++;
3930d02842fSSascha Wildner ParentHandle = ChildHandle;
3940d02842fSSascha Wildner ChildHandle = NULL;
3950d02842fSSascha Wildner }
3960d02842fSSascha Wildner }
3970d02842fSSascha Wildner else
3980d02842fSSascha Wildner {
3990d02842fSSascha Wildner /*
4000d02842fSSascha Wildner * No more children in this object, go back up to
4010d02842fSSascha Wildner * the object's parent
4020d02842fSSascha Wildner */
4030d02842fSSascha Wildner Level--;
4040d02842fSSascha Wildner
4050d02842fSSascha Wildner /* Delete all children now */
4060d02842fSSascha Wildner
4070d02842fSSascha Wildner AcpiNsDeleteChildren (ChildHandle);
4080d02842fSSascha Wildner
4090d02842fSSascha Wildner ChildHandle = ParentHandle;
4100d02842fSSascha Wildner Status = AcpiGetParent (ParentHandle, &ParentHandle);
4110d02842fSSascha Wildner if (ACPI_FAILURE (Status))
4120d02842fSSascha Wildner {
4130d02842fSSascha Wildner return_ACPI_STATUS (Status);
4140d02842fSSascha Wildner }
4150d02842fSSascha Wildner }
4160d02842fSSascha Wildner }
4170d02842fSSascha Wildner
4180d02842fSSascha Wildner /* Now delete the starting object, and we are done */
4190d02842fSSascha Wildner
4200d02842fSSascha Wildner AcpiNsRemoveNode (ChildHandle);
4210d02842fSSascha Wildner return_ACPI_STATUS (AE_OK);
4220d02842fSSascha Wildner }
4230d02842fSSascha Wildner
4240d02842fSSascha Wildner
4250d02842fSSascha Wildner /*******************************************************************************
4260d02842fSSascha Wildner *
4270d02842fSSascha Wildner * FUNCTION: AcpiNsUnloadNameSpace
4280d02842fSSascha Wildner *
4290d02842fSSascha Wildner * PARAMETERS: Handle - Root of namespace subtree to be deleted
4300d02842fSSascha Wildner *
4310d02842fSSascha Wildner * RETURN: Status
4320d02842fSSascha Wildner *
4330d02842fSSascha Wildner * DESCRIPTION: Shrinks the namespace, typically in response to an undocking
4340d02842fSSascha Wildner * event. Deletes an entire subtree starting from (and
4350d02842fSSascha Wildner * including) the given handle.
4360d02842fSSascha Wildner *
4370d02842fSSascha Wildner ******************************************************************************/
4380d02842fSSascha Wildner
4390d02842fSSascha Wildner ACPI_STATUS
AcpiNsUnloadNamespace(ACPI_HANDLE Handle)4400d02842fSSascha Wildner AcpiNsUnloadNamespace (
4410d02842fSSascha Wildner ACPI_HANDLE Handle)
4420d02842fSSascha Wildner {
4430d02842fSSascha Wildner ACPI_STATUS Status;
4440d02842fSSascha Wildner
4450d02842fSSascha Wildner
4460d02842fSSascha Wildner ACPI_FUNCTION_TRACE (NsUnloadNameSpace);
4470d02842fSSascha Wildner
4480d02842fSSascha Wildner
4490d02842fSSascha Wildner /* Parameter validation */
4500d02842fSSascha Wildner
4510d02842fSSascha Wildner if (!AcpiGbl_RootNode)
4520d02842fSSascha Wildner {
4530d02842fSSascha Wildner return_ACPI_STATUS (AE_NO_NAMESPACE);
4540d02842fSSascha Wildner }
4550d02842fSSascha Wildner
4560d02842fSSascha Wildner if (!Handle)
4570d02842fSSascha Wildner {
4580d02842fSSascha Wildner return_ACPI_STATUS (AE_BAD_PARAMETER);
4590d02842fSSascha Wildner }
4600d02842fSSascha Wildner
4610d02842fSSascha Wildner /* This function does the real work */
4620d02842fSSascha Wildner
4630d02842fSSascha Wildner Status = AcpiNsDeleteSubtree (Handle);
4640d02842fSSascha Wildner return_ACPI_STATUS (Status);
4650d02842fSSascha Wildner }
4660d02842fSSascha Wildner #endif
467