1 /*******************************************************************************
3 * Module Name: nssearch - Namespace search
6 ******************************************************************************/
8 /******************************************************************************
12 * Some or all of this work - Copyright (c) 1999 - 2003, Intel Corp.
13 * All rights reserved.
17 * 2.1. This is your license from Intel Corp. under its intellectual property
18 * rights. You may have additional license terms from the party that provided
19 * you this software, covering your right to use that party's intellectual
22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
23 * copy of the source code appearing in this file ("Covered Code") an
24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
25 * base code distributed originally by Intel ("Original Intel Code") to copy,
26 * make derivatives, distribute, use and display any portion of the Covered
27 * Code in any form, with the right to sublicense such rights; and
29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
30 * license (with the right to sublicense), under only those claims of Intel
31 * patents that are infringed by the Original Intel Code, to make, use, sell,
32 * offer to sell, and import the Covered Code and derivative works thereof
33 * solely to the minimum extent necessary to exercise the above copyright
34 * license, and in no event shall the patent license extend to any additions
35 * to or modifications of the Original Intel Code. No other license or right
36 * is granted directly or by implication, estoppel or otherwise;
38 * The above copyright and patent license is granted only if the following
43 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
44 * Redistribution of source code of any substantial portion of the Covered
45 * Code or modification with rights to further distribute source must include
46 * the above Copyright Notice, the above License, this list of Conditions,
47 * and the following Disclaimer and Export Compliance provision. In addition,
48 * Licensee must cause all Covered Code to which Licensee contributes to
49 * contain a file documenting the changes Licensee made to create that Covered
50 * Code and the date of any change. Licensee must include in that file the
51 * documentation of any changes made by any predecessor Licensee. Licensee
52 * must include a prominent statement that the modification is derived,
53 * directly or indirectly, from Original Intel Code.
55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
56 * Redistribution of source code of any substantial portion of the Covered
57 * Code or modification without rights to further distribute source must
58 * include the following Disclaimer and Export Compliance provision in the
59 * documentation and/or other materials provided with distribution. In
60 * addition, Licensee may not authorize further sublicense of source of any
61 * portion of the Covered Code, and must include terms to the effect that the
62 * license from Licensee to its licensee is limited to the intellectual
63 * property embodied in the software Licensee provides to its licensee, and
64 * not to intellectual property embodied in modifications its licensee may
67 * 3.3. Redistribution of Executable. Redistribution in executable form of any
68 * substantial portion of the Covered Code or modification must reproduce the
69 * above Copyright Notice, and the following Disclaimer and Export Compliance
70 * provision in the documentation and/or other materials provided with the
73 * 3.4. Intel retains all right, title, and interest in and to the Original
76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
77 * Intel shall be used in advertising or otherwise to promote the sale, use or
78 * other dealings in products derived from or relating to the Covered Code
79 * without prior written authorization from Intel.
81 * 4. Disclaimer and Export Compliance
83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
100 * 4.3. Licensee shall not export, either directly or indirectly, any of this
101 * software or system incorporating such software without first obtaining any
102 * required license or other approval from the U. S. Department of Commerce or
103 * any other agency or department of the United States Government. In the
104 * event Licensee exports any such software from the United States or
105 * re-exports any such software from a foreign destination, Licensee shall
106 * ensure that the distribution and export/re-export of the software is in
107 * compliance with all laws, regulations, orders, or other restrictions of the
108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
109 * any of its subsidiaries will export/re-export any technical data, process,
110 * software, or service, directly or indirectly, to any country for which the
111 * United States government or any agency thereof requires an export license,
112 * other governmental approval, or letter of assurance, without first obtaining
113 * such license, approval or letter.
115 *****************************************************************************/
116 /* $DragonFly: src/sys/contrib/dev/acpica/Attic/nssearch.c,v 1.1 2003/09/24 03:32:16 drhodus Exp $ */
118 #define __NSSEARCH_C__
121 #include "acnamesp.h"
124 #define _COMPONENT ACPI_NAMESPACE
125 ACPI_MODULE_NAME ("nssearch")
128 /*******************************************************************************
130 * FUNCTION: AcpiNsSearchNode
132 * PARAMETERS: *TargetName - Ascii ACPI name to search for
133 * *Node - Starting node where search will begin
134 * Type - Object type to match
135 * **ReturnNode - Where the matched Named obj is returned
139 * DESCRIPTION: Search a single level of the namespace. Performs a
140 * simple search of the specified level, and does not add
141 * entries or search parents.
144 * Named object lists are built (and subsequently dumped) in the
145 * order in which the names are encountered during the namespace load;
147 * All namespace searching is linear in this implementation, but
148 * could be easily modified to support any improved search
149 * algorithm. However, the linear search was chosen for simplicity
150 * and because the trees are small and the other interpreter
151 * execution overhead is relatively high.
153 ******************************************************************************/
158 ACPI_NAMESPACE_NODE *Node,
159 ACPI_OBJECT_TYPE Type,
160 ACPI_NAMESPACE_NODE **ReturnNode)
162 ACPI_NAMESPACE_NODE *NextNode;
165 ACPI_FUNCTION_TRACE ("NsSearchNode");
168 #ifdef ACPI_DEBUG_OUTPUT
169 if (ACPI_LV_NAMES & AcpiDbgLevel)
173 ScopeName = AcpiNsGetExternalPathname (Node);
176 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Searching %s [%p] For %4.4s (%s)\n",
177 ScopeName, Node, (char *) &TargetName, AcpiUtGetTypeName (Type)));
179 ACPI_MEM_FREE (ScopeName);
185 * Search for name at this namespace level, which is to say that we
186 * must search for the name among the children of this object
188 NextNode = Node->Child;
191 /* Check for match against the name */
193 if (NextNode->Name.Integer == TargetName)
196 * Found matching entry.
198 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
199 "Name %4.4s Type [%s] found at %p\n",
200 (char *) &TargetName, AcpiUtGetTypeName (NextNode->Type), NextNode));
202 *ReturnNode = NextNode;
203 return_ACPI_STATUS (AE_OK);
207 * The last entry in the list points back to the parent,
208 * so a flag is used to indicate the end-of-list
210 if (NextNode->Flags & ANOBJ_END_OF_PEER_LIST)
212 /* Searched entire list, we are done */
217 /* Didn't match name, move on to the next peer object */
219 NextNode = NextNode->Peer;
222 /* Searched entire namespace level, not found */
224 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Name %4.4s Type [%s] not found at %p\n",
225 (char *) &TargetName, AcpiUtGetTypeName (Type), NextNode));
227 return_ACPI_STATUS (AE_NOT_FOUND);
231 /*******************************************************************************
233 * FUNCTION: AcpiNsSearchParentTree
235 * PARAMETERS: *TargetName - Ascii ACPI name to search for
236 * *Node - Starting node where search will begin
237 * Type - Object type to match
238 * **ReturnNode - Where the matched Named Obj is returned
242 * DESCRIPTION: Called when a name has not been found in the current namespace
243 * level. Before adding it or giving up, ACPI scope rules require
244 * searching enclosing scopes in cases identified by AcpiNsLocal().
246 * "A name is located by finding the matching name in the current
247 * name space, and then in the parent name space. If the parent
248 * name space does not contain the name, the search continues
249 * recursively until either the name is found or the name space
250 * does not have a parent (the root of the name space). This
251 * indicates that the name is not found" (From ACPI Specification,
254 ******************************************************************************/
257 AcpiNsSearchParentTree (
259 ACPI_NAMESPACE_NODE *Node,
260 ACPI_OBJECT_TYPE Type,
261 ACPI_NAMESPACE_NODE **ReturnNode)
264 ACPI_NAMESPACE_NODE *ParentNode;
267 ACPI_FUNCTION_TRACE ("NsSearchParentTree");
270 ParentNode = AcpiNsGetParentNode (Node);
273 * If there is no parent (i.e., we are at the root) or
274 * type is "local", we won't be searching the parent tree.
278 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "[%4.4s] has no parent\n",
279 (char *) &TargetName));
280 return_ACPI_STATUS (AE_NOT_FOUND);
283 if (AcpiNsLocal (Type))
285 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
286 "[%4.4s] type [%s] must be local to this scope (no parent search)\n",
287 (char *) &TargetName, AcpiUtGetTypeName (Type)));
288 return_ACPI_STATUS (AE_NOT_FOUND);
291 /* Search the parent tree */
293 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Searching parent for %4.4s\n", (char *) &TargetName));
296 * Search parents until found the target or we have backed up to
302 * Search parent scope. Use TYPE_ANY because we don't care about the
303 * object type at this point, we only care about the existence of
304 * the actual name we are searching for. Typechecking comes later.
306 Status = AcpiNsSearchNode (TargetName, ParentNode,
307 ACPI_TYPE_ANY, ReturnNode);
308 if (ACPI_SUCCESS (Status))
310 return_ACPI_STATUS (Status);
314 * Not found here, go up another level
315 * (until we reach the root)
317 ParentNode = AcpiNsGetParentNode (ParentNode);
320 /* Not found in parent tree */
322 return_ACPI_STATUS (AE_NOT_FOUND);
326 /*******************************************************************************
328 * FUNCTION: AcpiNsSearchAndEnter
330 * PARAMETERS: TargetName - Ascii ACPI name to search for (4 chars)
331 * WalkState - Current state of the walk
332 * *Node - Starting node where search will begin
333 * InterpreterMode - Add names only in ACPI_MODE_LOAD_PASS_x.
334 * Otherwise,search only.
335 * Type - Object type to match
336 * Flags - Flags describing the search restrictions
337 * **ReturnNode - Where the Node is returned
341 * DESCRIPTION: Search for a name segment in a single namespace level,
342 * optionally adding it if it is not found. If the passed
343 * Type is not Any and the type previously stored in the
344 * entry was Any (i.e. unknown), update the stored type.
346 * In ACPI_IMODE_EXECUTE, search only.
347 * In other modes, search and add if not found.
349 ******************************************************************************/
352 AcpiNsSearchAndEnter (
354 ACPI_WALK_STATE *WalkState,
355 ACPI_NAMESPACE_NODE *Node,
356 ACPI_INTERPRETER_MODE InterpreterMode,
357 ACPI_OBJECT_TYPE Type,
359 ACPI_NAMESPACE_NODE **ReturnNode)
362 ACPI_NAMESPACE_NODE *NewNode;
365 ACPI_FUNCTION_TRACE ("NsSearchAndEnter");
368 /* Parameter validation */
370 if (!Node || !TargetName || !ReturnNode)
372 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null param: Node %p Name %X ReturnNode %p\n",
373 Node, TargetName, ReturnNode));
375 ACPI_REPORT_ERROR (("NsSearchAndEnter: Null parameter\n"));
376 return_ACPI_STATUS (AE_BAD_PARAMETER);
379 /* Name must consist of printable characters */
381 if (!AcpiUtValidAcpiName (TargetName))
383 ACPI_REPORT_ERROR (("NsSearchAndEnter: Bad character in ACPI Name: %X\n",
385 return_ACPI_STATUS (AE_BAD_CHARACTER);
388 /* Try to find the name in the namespace level specified by the caller */
390 *ReturnNode = ACPI_ENTRY_NOT_FOUND;
391 Status = AcpiNsSearchNode (TargetName, Node, Type, ReturnNode);
392 if (Status != AE_NOT_FOUND)
395 * If we found it AND the request specifies that a find is an error,
398 if ((Status == AE_OK) &&
399 (Flags & ACPI_NS_ERROR_IF_FOUND))
401 Status = AE_ALREADY_EXISTS;
405 * Either found it or there was an error
406 * -- finished either way
408 return_ACPI_STATUS (Status);
412 * The name was not found. If we are NOT performing the
413 * first pass (name entry) of loading the namespace, search
414 * the parent tree (all the way to the root if necessary.)
415 * We don't want to perform the parent search when the
416 * namespace is actually being loaded. We want to perform
417 * the search when namespace references are being resolved
418 * (load pass 2) and during the execution phase.
420 if ((InterpreterMode != ACPI_IMODE_LOAD_PASS1) &&
421 (Flags & ACPI_NS_SEARCH_PARENT))
424 * Not found at this level - search parent tree according
425 * to ACPI specification
427 Status = AcpiNsSearchParentTree (TargetName, Node,
429 if (ACPI_SUCCESS (Status))
431 return_ACPI_STATUS (Status);
436 * In execute mode, just search, never add names. Exit now.
438 if (InterpreterMode == ACPI_IMODE_EXECUTE)
440 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "%4.4s Not found in %p [Not adding]\n",
441 (char *) &TargetName, Node));
443 return_ACPI_STATUS (AE_NOT_FOUND);
446 /* Create the new named object */
448 NewNode = AcpiNsCreateNode (TargetName);
451 return_ACPI_STATUS (AE_NO_MEMORY);
454 /* Install the new object into the parent's list of children */
456 AcpiNsInstallNode (WalkState, Node, NewNode, Type);
457 *ReturnNode = NewNode;
459 return_ACPI_STATUS (AE_OK);