10d02842fSSascha Wildner /*******************************************************************************
20d02842fSSascha Wildner *
30d02842fSSascha Wildner * Module Name: nssearch - Namespace search
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
1560d02842fSSascha Wildner #ifdef ACPI_ASL_COMPILER
1570d02842fSSascha Wildner #include "amlcode.h"
1580d02842fSSascha Wildner #endif
1590d02842fSSascha Wildner
1600d02842fSSascha Wildner #define _COMPONENT ACPI_NAMESPACE
1610d02842fSSascha Wildner ACPI_MODULE_NAME ("nssearch")
1620d02842fSSascha Wildner
1630d02842fSSascha Wildner /* Local prototypes */
1640d02842fSSascha Wildner
1650d02842fSSascha Wildner static ACPI_STATUS
1660d02842fSSascha Wildner AcpiNsSearchParentTree (
1670d02842fSSascha Wildner UINT32 TargetName,
1680d02842fSSascha Wildner ACPI_NAMESPACE_NODE *Node,
1690d02842fSSascha Wildner ACPI_OBJECT_TYPE Type,
1700d02842fSSascha Wildner ACPI_NAMESPACE_NODE **ReturnNode);
1710d02842fSSascha Wildner
1720d02842fSSascha Wildner
1730d02842fSSascha Wildner /*******************************************************************************
1740d02842fSSascha Wildner *
1750d02842fSSascha Wildner * FUNCTION: AcpiNsSearchOneScope
1760d02842fSSascha Wildner *
1770d02842fSSascha Wildner * PARAMETERS: TargetName - Ascii ACPI name to search for
1780d02842fSSascha Wildner * ParentNode - Starting node where search will begin
1790d02842fSSascha Wildner * Type - Object type to match
1800d02842fSSascha Wildner * ReturnNode - Where the matched Named obj is returned
1810d02842fSSascha Wildner *
1820d02842fSSascha Wildner * RETURN: Status
1830d02842fSSascha Wildner *
1840d02842fSSascha Wildner * DESCRIPTION: Search a single level of the namespace. Performs a
1850d02842fSSascha Wildner * simple search of the specified level, and does not add
1860d02842fSSascha Wildner * entries or search parents.
1870d02842fSSascha Wildner *
1880d02842fSSascha Wildner *
1890d02842fSSascha Wildner * Named object lists are built (and subsequently dumped) in the
1900d02842fSSascha Wildner * order in which the names are encountered during the namespace load;
1910d02842fSSascha Wildner *
1920d02842fSSascha Wildner * All namespace searching is linear in this implementation, but
1930d02842fSSascha Wildner * could be easily modified to support any improved search
1940d02842fSSascha Wildner * algorithm. However, the linear search was chosen for simplicity
1950d02842fSSascha Wildner * and because the trees are small and the other interpreter
1960d02842fSSascha Wildner * execution overhead is relatively high.
1970d02842fSSascha Wildner *
1980d02842fSSascha Wildner * Note: CPU execution analysis has shown that the AML interpreter spends
1990d02842fSSascha Wildner * a very small percentage of its time searching the namespace. Therefore,
2000d02842fSSascha Wildner * the linear search seems to be sufficient, as there would seem to be
2010d02842fSSascha Wildner * little value in improving the search.
2020d02842fSSascha Wildner *
2030d02842fSSascha Wildner ******************************************************************************/
2040d02842fSSascha Wildner
2050d02842fSSascha Wildner ACPI_STATUS
AcpiNsSearchOneScope(UINT32 TargetName,ACPI_NAMESPACE_NODE * ParentNode,ACPI_OBJECT_TYPE Type,ACPI_NAMESPACE_NODE ** ReturnNode)2060d02842fSSascha Wildner AcpiNsSearchOneScope (
2070d02842fSSascha Wildner UINT32 TargetName,
2080d02842fSSascha Wildner ACPI_NAMESPACE_NODE *ParentNode,
2090d02842fSSascha Wildner ACPI_OBJECT_TYPE Type,
2100d02842fSSascha Wildner ACPI_NAMESPACE_NODE **ReturnNode)
2110d02842fSSascha Wildner {
2120d02842fSSascha Wildner ACPI_NAMESPACE_NODE *Node;
2130d02842fSSascha Wildner
2140d02842fSSascha Wildner
2150d02842fSSascha Wildner ACPI_FUNCTION_TRACE (NsSearchOneScope);
2160d02842fSSascha Wildner
2170d02842fSSascha Wildner
2180d02842fSSascha Wildner #ifdef ACPI_DEBUG_OUTPUT
2190d02842fSSascha Wildner if (ACPI_LV_NAMES & AcpiDbgLevel)
2200d02842fSSascha Wildner {
2210d02842fSSascha Wildner char *ScopeName;
2220d02842fSSascha Wildner
223820c5b08SSascha Wildner ScopeName = AcpiNsGetNormalizedPathname (ParentNode, TRUE);
2240d02842fSSascha Wildner if (ScopeName)
2250d02842fSSascha Wildner {
2260d02842fSSascha Wildner ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
2270d02842fSSascha Wildner "Searching %s (%p) For [%4.4s] (%s)\n",
2280d02842fSSascha Wildner ScopeName, ParentNode, ACPI_CAST_PTR (char, &TargetName),
2290d02842fSSascha Wildner AcpiUtGetTypeName (Type)));
2300d02842fSSascha Wildner
2310d02842fSSascha Wildner ACPI_FREE (ScopeName);
2320d02842fSSascha Wildner }
2330d02842fSSascha Wildner }
2340d02842fSSascha Wildner #endif
2350d02842fSSascha Wildner
2360d02842fSSascha Wildner /*
2370d02842fSSascha Wildner * Search for name at this namespace level, which is to say that we
2380d02842fSSascha Wildner * must search for the name among the children of this object
2390d02842fSSascha Wildner */
2400d02842fSSascha Wildner Node = ParentNode->Child;
2410d02842fSSascha Wildner while (Node)
2420d02842fSSascha Wildner {
2430d02842fSSascha Wildner /* Check for match against the name */
2440d02842fSSascha Wildner
2450d02842fSSascha Wildner if (Node->Name.Integer == TargetName)
2460d02842fSSascha Wildner {
2470d02842fSSascha Wildner /* Resolve a control method alias if any */
2480d02842fSSascha Wildner
2490d02842fSSascha Wildner if (AcpiNsGetType (Node) == ACPI_TYPE_LOCAL_METHOD_ALIAS)
2500d02842fSSascha Wildner {
2510d02842fSSascha Wildner Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Node->Object);
2520d02842fSSascha Wildner }
2530d02842fSSascha Wildner
2540d02842fSSascha Wildner /* Found matching entry */
2550d02842fSSascha Wildner
2560d02842fSSascha Wildner ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
2570d02842fSSascha Wildner "Name [%4.4s] (%s) %p found in scope [%4.4s] %p\n",
2580d02842fSSascha Wildner ACPI_CAST_PTR (char, &TargetName),
2590d02842fSSascha Wildner AcpiUtGetTypeName (Node->Type),
2600d02842fSSascha Wildner Node, AcpiUtGetNodeName (ParentNode), ParentNode));
2610d02842fSSascha Wildner
2620d02842fSSascha Wildner *ReturnNode = Node;
2630d02842fSSascha Wildner return_ACPI_STATUS (AE_OK);
2640d02842fSSascha Wildner }
2650d02842fSSascha Wildner
2660d02842fSSascha Wildner /* Didn't match name, move on to the next peer object */
2670d02842fSSascha Wildner
2680d02842fSSascha Wildner Node = Node->Peer;
2690d02842fSSascha Wildner }
2700d02842fSSascha Wildner
2710d02842fSSascha Wildner /* Searched entire namespace level, not found */
2720d02842fSSascha Wildner
2730d02842fSSascha Wildner ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
2740d02842fSSascha Wildner "Name [%4.4s] (%s) not found in search in scope [%4.4s] "
2750d02842fSSascha Wildner "%p first child %p\n",
2760d02842fSSascha Wildner ACPI_CAST_PTR (char, &TargetName), AcpiUtGetTypeName (Type),
2770d02842fSSascha Wildner AcpiUtGetNodeName (ParentNode), ParentNode, ParentNode->Child));
2780d02842fSSascha Wildner
2790d02842fSSascha Wildner return_ACPI_STATUS (AE_NOT_FOUND);
2800d02842fSSascha Wildner }
2810d02842fSSascha Wildner
2820d02842fSSascha Wildner
2830d02842fSSascha Wildner /*******************************************************************************
2840d02842fSSascha Wildner *
2850d02842fSSascha Wildner * FUNCTION: AcpiNsSearchParentTree
2860d02842fSSascha Wildner *
2870d02842fSSascha Wildner * PARAMETERS: TargetName - Ascii ACPI name to search for
2880d02842fSSascha Wildner * Node - Starting node where search will begin
2890d02842fSSascha Wildner * Type - Object type to match
2900d02842fSSascha Wildner * ReturnNode - Where the matched Node is returned
2910d02842fSSascha Wildner *
2920d02842fSSascha Wildner * RETURN: Status
2930d02842fSSascha Wildner *
2940d02842fSSascha Wildner * DESCRIPTION: Called when a name has not been found in the current namespace
2950d02842fSSascha Wildner * level. Before adding it or giving up, ACPI scope rules require
2960d02842fSSascha Wildner * searching enclosing scopes in cases identified by AcpiNsLocal().
2970d02842fSSascha Wildner *
2980d02842fSSascha Wildner * "A name is located by finding the matching name in the current
2990d02842fSSascha Wildner * name space, and then in the parent name space. If the parent
3000d02842fSSascha Wildner * name space does not contain the name, the search continues
3010d02842fSSascha Wildner * recursively until either the name is found or the name space
3020d02842fSSascha Wildner * does not have a parent (the root of the name space). This
3030d02842fSSascha Wildner * indicates that the name is not found" (From ACPI Specification,
3040d02842fSSascha Wildner * section 5.3)
3050d02842fSSascha Wildner *
3060d02842fSSascha Wildner ******************************************************************************/
3070d02842fSSascha Wildner
3080d02842fSSascha Wildner static ACPI_STATUS
AcpiNsSearchParentTree(UINT32 TargetName,ACPI_NAMESPACE_NODE * Node,ACPI_OBJECT_TYPE Type,ACPI_NAMESPACE_NODE ** ReturnNode)3090d02842fSSascha Wildner AcpiNsSearchParentTree (
3100d02842fSSascha Wildner UINT32 TargetName,
3110d02842fSSascha Wildner ACPI_NAMESPACE_NODE *Node,
3120d02842fSSascha Wildner ACPI_OBJECT_TYPE Type,
3130d02842fSSascha Wildner ACPI_NAMESPACE_NODE **ReturnNode)
3140d02842fSSascha Wildner {
3150d02842fSSascha Wildner ACPI_STATUS Status;
3160d02842fSSascha Wildner ACPI_NAMESPACE_NODE *ParentNode;
3170d02842fSSascha Wildner
3180d02842fSSascha Wildner
3190d02842fSSascha Wildner ACPI_FUNCTION_TRACE (NsSearchParentTree);
3200d02842fSSascha Wildner
3210d02842fSSascha Wildner
3220d02842fSSascha Wildner ParentNode = Node->Parent;
3230d02842fSSascha Wildner
3240d02842fSSascha Wildner /*
3250d02842fSSascha Wildner * If there is no parent (i.e., we are at the root) or type is "local",
3260d02842fSSascha Wildner * we won't be searching the parent tree.
3270d02842fSSascha Wildner */
3280d02842fSSascha Wildner if (!ParentNode)
3290d02842fSSascha Wildner {
3300d02842fSSascha Wildner ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "[%4.4s] has no parent\n",
3310d02842fSSascha Wildner ACPI_CAST_PTR (char, &TargetName)));
3320d02842fSSascha Wildner return_ACPI_STATUS (AE_NOT_FOUND);
3330d02842fSSascha Wildner }
3340d02842fSSascha Wildner
3350d02842fSSascha Wildner if (AcpiNsLocal (Type))
3360d02842fSSascha Wildner {
3370d02842fSSascha Wildner ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
3380d02842fSSascha Wildner "[%4.4s] type [%s] must be local to this scope (no parent search)\n",
3390d02842fSSascha Wildner ACPI_CAST_PTR (char, &TargetName), AcpiUtGetTypeName (Type)));
3400d02842fSSascha Wildner return_ACPI_STATUS (AE_NOT_FOUND);
3410d02842fSSascha Wildner }
3420d02842fSSascha Wildner
3430d02842fSSascha Wildner /* Search the parent tree */
3440d02842fSSascha Wildner
3450d02842fSSascha Wildner ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
3460d02842fSSascha Wildner "Searching parent [%4.4s] for [%4.4s]\n",
3470d02842fSSascha Wildner AcpiUtGetNodeName (ParentNode), ACPI_CAST_PTR (char, &TargetName)));
3480d02842fSSascha Wildner
3490d02842fSSascha Wildner /* Search parents until target is found or we have backed up to the root */
3500d02842fSSascha Wildner
3510d02842fSSascha Wildner while (ParentNode)
3520d02842fSSascha Wildner {
3530d02842fSSascha Wildner /*
3540d02842fSSascha Wildner * Search parent scope. Use TYPE_ANY because we don't care about the
3550d02842fSSascha Wildner * object type at this point, we only care about the existence of
3560d02842fSSascha Wildner * the actual name we are searching for. Typechecking comes later.
3570d02842fSSascha Wildner */
3580d02842fSSascha Wildner Status = AcpiNsSearchOneScope (
3590d02842fSSascha Wildner TargetName, ParentNode, ACPI_TYPE_ANY, ReturnNode);
3600d02842fSSascha Wildner if (ACPI_SUCCESS (Status))
3610d02842fSSascha Wildner {
3620d02842fSSascha Wildner return_ACPI_STATUS (Status);
3630d02842fSSascha Wildner }
3640d02842fSSascha Wildner
3650d02842fSSascha Wildner /* Not found here, go up another level (until we reach the root) */
3660d02842fSSascha Wildner
3670d02842fSSascha Wildner ParentNode = ParentNode->Parent;
3680d02842fSSascha Wildner }
3690d02842fSSascha Wildner
3700d02842fSSascha Wildner /* Not found in parent tree */
3710d02842fSSascha Wildner
3720d02842fSSascha Wildner return_ACPI_STATUS (AE_NOT_FOUND);
3730d02842fSSascha Wildner }
3740d02842fSSascha Wildner
3750d02842fSSascha Wildner
3760d02842fSSascha Wildner /*******************************************************************************
3770d02842fSSascha Wildner *
3780d02842fSSascha Wildner * FUNCTION: AcpiNsSearchAndEnter
3790d02842fSSascha Wildner *
3800d02842fSSascha Wildner * PARAMETERS: TargetName - Ascii ACPI name to search for (4 chars)
3810d02842fSSascha Wildner * WalkState - Current state of the walk
3820d02842fSSascha Wildner * Node - Starting node where search will begin
3830d02842fSSascha Wildner * InterpreterMode - Add names only in ACPI_MODE_LOAD_PASS_x.
3840d02842fSSascha Wildner * Otherwise,search only.
3850d02842fSSascha Wildner * Type - Object type to match
3860d02842fSSascha Wildner * Flags - Flags describing the search restrictions
3870d02842fSSascha Wildner * ReturnNode - Where the Node is returned
3880d02842fSSascha Wildner *
3890d02842fSSascha Wildner * RETURN: Status
3900d02842fSSascha Wildner *
3910d02842fSSascha Wildner * DESCRIPTION: Search for a name segment in a single namespace level,
3920d02842fSSascha Wildner * optionally adding it if it is not found. If the passed
3930d02842fSSascha Wildner * Type is not Any and the type previously stored in the
3940d02842fSSascha Wildner * entry was Any (i.e. unknown), update the stored type.
3950d02842fSSascha Wildner *
3960d02842fSSascha Wildner * In ACPI_IMODE_EXECUTE, search only.
3970d02842fSSascha Wildner * In other modes, search and add if not found.
3980d02842fSSascha Wildner *
3990d02842fSSascha Wildner ******************************************************************************/
4000d02842fSSascha Wildner
4010d02842fSSascha Wildner ACPI_STATUS
AcpiNsSearchAndEnter(UINT32 TargetName,ACPI_WALK_STATE * WalkState,ACPI_NAMESPACE_NODE * Node,ACPI_INTERPRETER_MODE InterpreterMode,ACPI_OBJECT_TYPE Type,UINT32 Flags,ACPI_NAMESPACE_NODE ** ReturnNode)4020d02842fSSascha Wildner AcpiNsSearchAndEnter (
4030d02842fSSascha Wildner UINT32 TargetName,
4040d02842fSSascha Wildner ACPI_WALK_STATE *WalkState,
4050d02842fSSascha Wildner ACPI_NAMESPACE_NODE *Node,
4060d02842fSSascha Wildner ACPI_INTERPRETER_MODE InterpreterMode,
4070d02842fSSascha Wildner ACPI_OBJECT_TYPE Type,
4080d02842fSSascha Wildner UINT32 Flags,
4090d02842fSSascha Wildner ACPI_NAMESPACE_NODE **ReturnNode)
4100d02842fSSascha Wildner {
4110d02842fSSascha Wildner ACPI_STATUS Status;
4120d02842fSSascha Wildner ACPI_NAMESPACE_NODE *NewNode;
4130d02842fSSascha Wildner
4140d02842fSSascha Wildner
4150d02842fSSascha Wildner ACPI_FUNCTION_TRACE (NsSearchAndEnter);
4160d02842fSSascha Wildner
4170d02842fSSascha Wildner
4180d02842fSSascha Wildner /* Parameter validation */
4190d02842fSSascha Wildner
4200d02842fSSascha Wildner if (!Node || !TargetName || !ReturnNode)
4210d02842fSSascha Wildner {
4220d02842fSSascha Wildner ACPI_ERROR ((AE_INFO,
4230d02842fSSascha Wildner "Null parameter: Node %p Name 0x%X ReturnNode %p",
4240d02842fSSascha Wildner Node, TargetName, ReturnNode));
4250d02842fSSascha Wildner return_ACPI_STATUS (AE_BAD_PARAMETER);
4260d02842fSSascha Wildner }
4270d02842fSSascha Wildner
4280d02842fSSascha Wildner /*
4290d02842fSSascha Wildner * Name must consist of valid ACPI characters. We will repair the name if
4300d02842fSSascha Wildner * necessary because we don't want to abort because of this, but we want
4310d02842fSSascha Wildner * all namespace names to be printable. A warning message is appropriate.
4320d02842fSSascha Wildner *
4330d02842fSSascha Wildner * This issue came up because there are in fact machines that exhibit
4340d02842fSSascha Wildner * this problem, and we want to be able to enable ACPI support for them,
4350d02842fSSascha Wildner * even though there are a few bad names.
4360d02842fSSascha Wildner */
4370d02842fSSascha Wildner AcpiUtRepairName (ACPI_CAST_PTR (char, &TargetName));
4380d02842fSSascha Wildner
4390d02842fSSascha Wildner /* Try to find the name in the namespace level specified by the caller */
4400d02842fSSascha Wildner
4410d02842fSSascha Wildner *ReturnNode = ACPI_ENTRY_NOT_FOUND;
4420d02842fSSascha Wildner Status = AcpiNsSearchOneScope (TargetName, Node, Type, ReturnNode);
4430d02842fSSascha Wildner if (Status != AE_NOT_FOUND)
4440d02842fSSascha Wildner {
4450d02842fSSascha Wildner /*
4460d02842fSSascha Wildner * If we found it AND the request specifies that a find is an error,
4470d02842fSSascha Wildner * return the error
4480d02842fSSascha Wildner */
44925ca8c79SSascha Wildner if (Status == AE_OK)
45025ca8c79SSascha Wildner {
45125ca8c79SSascha Wildner /* The node was found in the namespace */
45225ca8c79SSascha Wildner
45325ca8c79SSascha Wildner /*
45425ca8c79SSascha Wildner * If the namespace override feature is enabled for this node,
45525ca8c79SSascha Wildner * delete any existing attached sub-object and make the node
45625ca8c79SSascha Wildner * look like a new node that is owned by the override table.
45725ca8c79SSascha Wildner */
45825ca8c79SSascha Wildner if (Flags & ACPI_NS_OVERRIDE_IF_FOUND)
45925ca8c79SSascha Wildner {
46025ca8c79SSascha Wildner ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
46125ca8c79SSascha Wildner "Namespace override: %4.4s pass %u type %X Owner %X\n",
46225ca8c79SSascha Wildner ACPI_CAST_PTR(char, &TargetName), InterpreterMode,
46325ca8c79SSascha Wildner (*ReturnNode)->Type, WalkState->OwnerId));
46425ca8c79SSascha Wildner
46525ca8c79SSascha Wildner AcpiNsDeleteChildren (*ReturnNode);
46625ca8c79SSascha Wildner if (AcpiGbl_RuntimeNamespaceOverride)
46725ca8c79SSascha Wildner {
46825ca8c79SSascha Wildner AcpiUtRemoveReference ((*ReturnNode)->Object);
46925ca8c79SSascha Wildner (*ReturnNode)->Object = NULL;
47025ca8c79SSascha Wildner (*ReturnNode)->OwnerId = WalkState->OwnerId;
47125ca8c79SSascha Wildner }
47225ca8c79SSascha Wildner else
47325ca8c79SSascha Wildner {
47425ca8c79SSascha Wildner AcpiNsRemoveNode (*ReturnNode);
47525ca8c79SSascha Wildner *ReturnNode = ACPI_ENTRY_NOT_FOUND;
47625ca8c79SSascha Wildner }
47725ca8c79SSascha Wildner }
47825ca8c79SSascha Wildner
47925ca8c79SSascha Wildner /* Return an error if we don't expect to find the object */
48025ca8c79SSascha Wildner
48125ca8c79SSascha Wildner else if (Flags & ACPI_NS_ERROR_IF_FOUND)
4820d02842fSSascha Wildner {
4830d02842fSSascha Wildner Status = AE_ALREADY_EXISTS;
4840d02842fSSascha Wildner }
48525ca8c79SSascha Wildner }
4860d02842fSSascha Wildner
4870d02842fSSascha Wildner #ifdef ACPI_ASL_COMPILER
4880d02842fSSascha Wildner if (*ReturnNode && (*ReturnNode)->Type == ACPI_TYPE_ANY)
4890d02842fSSascha Wildner {
4900d02842fSSascha Wildner (*ReturnNode)->Flags |= ANOBJ_IS_EXTERNAL;
4910d02842fSSascha Wildner }
4920d02842fSSascha Wildner #endif
4930d02842fSSascha Wildner
4940d02842fSSascha Wildner /* Either found it or there was an error: finished either way */
4950d02842fSSascha Wildner
4960d02842fSSascha Wildner return_ACPI_STATUS (Status);
4970d02842fSSascha Wildner }
4980d02842fSSascha Wildner
4990d02842fSSascha Wildner /*
5000d02842fSSascha Wildner * The name was not found. If we are NOT performing the first pass
5010d02842fSSascha Wildner * (name entry) of loading the namespace, search the parent tree (all the
5020d02842fSSascha Wildner * way to the root if necessary.) We don't want to perform the parent
5030d02842fSSascha Wildner * search when the namespace is actually being loaded. We want to perform
5040d02842fSSascha Wildner * the search when namespace references are being resolved (load pass 2)
5050d02842fSSascha Wildner * and during the execution phase.
5060d02842fSSascha Wildner */
5070d02842fSSascha Wildner if ((InterpreterMode != ACPI_IMODE_LOAD_PASS1) &&
5080d02842fSSascha Wildner (Flags & ACPI_NS_SEARCH_PARENT))
5090d02842fSSascha Wildner {
5100d02842fSSascha Wildner /*
5110d02842fSSascha Wildner * Not found at this level - search parent tree according to the
5120d02842fSSascha Wildner * ACPI specification
5130d02842fSSascha Wildner */
5140d02842fSSascha Wildner Status = AcpiNsSearchParentTree (TargetName, Node, Type, ReturnNode);
5150d02842fSSascha Wildner if (ACPI_SUCCESS (Status))
5160d02842fSSascha Wildner {
5170d02842fSSascha Wildner return_ACPI_STATUS (Status);
5180d02842fSSascha Wildner }
5190d02842fSSascha Wildner }
5200d02842fSSascha Wildner
5210d02842fSSascha Wildner /* In execute mode, just search, never add names. Exit now */
5220d02842fSSascha Wildner
5230d02842fSSascha Wildner if (InterpreterMode == ACPI_IMODE_EXECUTE)
5240d02842fSSascha Wildner {
5250d02842fSSascha Wildner ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
5260d02842fSSascha Wildner "%4.4s Not found in %p [Not adding]\n",
5270d02842fSSascha Wildner ACPI_CAST_PTR (char, &TargetName), Node));
5280d02842fSSascha Wildner
5290d02842fSSascha Wildner return_ACPI_STATUS (AE_NOT_FOUND);
5300d02842fSSascha Wildner }
5310d02842fSSascha Wildner
5320d02842fSSascha Wildner /* Create the new named object */
5330d02842fSSascha Wildner
5340d02842fSSascha Wildner NewNode = AcpiNsCreateNode (TargetName);
5350d02842fSSascha Wildner if (!NewNode)
5360d02842fSSascha Wildner {
5370d02842fSSascha Wildner return_ACPI_STATUS (AE_NO_MEMORY);
5380d02842fSSascha Wildner }
5390d02842fSSascha Wildner
5400d02842fSSascha Wildner #ifdef ACPI_ASL_COMPILER
5410d02842fSSascha Wildner
5420d02842fSSascha Wildner /* Node is an object defined by an External() statement */
5430d02842fSSascha Wildner
5440d02842fSSascha Wildner if (Flags & ACPI_NS_EXTERNAL ||
5450d02842fSSascha Wildner (WalkState && WalkState->Opcode == AML_SCOPE_OP))
5460d02842fSSascha Wildner {
5470d02842fSSascha Wildner NewNode->Flags |= ANOBJ_IS_EXTERNAL;
5480d02842fSSascha Wildner }
5490d02842fSSascha Wildner #endif
5500d02842fSSascha Wildner
5510d02842fSSascha Wildner if (Flags & ACPI_NS_TEMPORARY)
5520d02842fSSascha Wildner {
5530d02842fSSascha Wildner NewNode->Flags |= ANOBJ_TEMPORARY;
5540d02842fSSascha Wildner }
5550d02842fSSascha Wildner
5560d02842fSSascha Wildner /* Install the new object into the parent's list of children */
5570d02842fSSascha Wildner
5580d02842fSSascha Wildner AcpiNsInstallNode (WalkState, Node, NewNode, Type);
5590d02842fSSascha Wildner *ReturnNode = NewNode;
5600d02842fSSascha Wildner return_ACPI_STATUS (AE_OK);
5610d02842fSSascha Wildner }
562