13 * All rights reserved.
14 *
15 * 2. License
16 *
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
20 * property rights.
21 *
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
28 *
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;
37 *
38 * The above copyright and patent license is granted only if the following
39 * conditions are met:
40 *
41 * 3. Conditions
42 *
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.
54 *
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
65 * make.
66 *
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
71 * distribution.
72 *
73 * 3.4. Intel retains all right, title, and interest in and to the Original
74 * Intel Code.
75 *
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.
80 *
81 * 4. Disclaimer and Export Compliance
82 *
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
89 * PARTICULAR PURPOSE.
90 *
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
98 * LIMITED REMEDY.
99 *
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.
114 *
115 *****************************************************************************/
116
117#define __NSACCESS_C__
118
119#include "acpi.h"
120#include "amlcode.h"
121#include "acnamesp.h"
122#include "acdispat.h"
123
124
125#define _COMPONENT ACPI_NAMESPACE
126 ACPI_MODULE_NAME ("nsaccess")
127
128
129/*******************************************************************************
130 *
131 * FUNCTION: AcpiNsRootInitialize
132 *
133 * PARAMETERS: None
134 *
135 * RETURN: Status
136 *
137 * DESCRIPTION: Allocate and initialize the default root named objects
138 *
139 * MUTEX: Locks namespace for entire execution
140 *
141 ******************************************************************************/
142
143ACPI_STATUS
144AcpiNsRootInitialize (void)
145{
146 ACPI_STATUS Status;
147 const ACPI_PREDEFINED_NAMES *InitVal = NULL;
148 ACPI_NAMESPACE_NODE *NewNode;
149 ACPI_OPERAND_OBJECT *ObjDesc;
150 ACPI_STRING Val = NULL;
151
152
153 ACPI_FUNCTION_TRACE ("NsRootInitialize");
154
155
156 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
157 if (ACPI_FAILURE (Status))
158 {
159 return_ACPI_STATUS (Status);
160 }
161
162 /*
163 * The global root ptr is initially NULL, so a non-NULL value indicates
164 * that AcpiNsRootInitialize() has already been called; just return.
165 */
166 if (AcpiGbl_RootNode)
167 {
168 Status = AE_OK;
169 goto UnlockAndExit;
170 }
171
172 /*
173 * Tell the rest of the subsystem that the root is initialized
174 * (This is OK because the namespace is locked)
175 */
176 AcpiGbl_RootNode = &AcpiGbl_RootNodeStruct;
177
178 /* Enter the pre-defined names in the name table */
179
180 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
181 "Entering predefined entries into namespace\n"));
182
183 for (InitVal = AcpiGbl_PreDefinedNames; InitVal->Name; InitVal++)
184 {
185 Status = AcpiNsLookup (NULL, InitVal->Name, InitVal->Type,
186 ACPI_IMODE_LOAD_PASS2, ACPI_NS_NO_UPSEARCH, NULL, &NewNode);
187
188 if (ACPI_FAILURE (Status) || (!NewNode)) /* Must be on same line for code converter */
189 {
190 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
191 "Could not create predefined name %s, %s\n",
192 InitVal->Name, AcpiFormatException (Status)));
193 }
194
195 /*
196 * Name entered successfully.
197 * If entry in PreDefinedNames[] specifies an
198 * initial value, create the initial value.
199 */
200 if (InitVal->Val)
201 {
202 Status = AcpiOsPredefinedOverride (InitVal, &Val);
203 if (ACPI_FAILURE (Status))
204 {
205 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not override predefined %s\n",
206 InitVal->Name));
207 }
208
209 if (!Val)
210 {
211 Val = InitVal->Val;
212 }
213
214 /*
215 * Entry requests an initial value, allocate a
216 * descriptor for it.
217 */
218 ObjDesc = AcpiUtCreateInternalObject (InitVal->Type);
219 if (!ObjDesc)
220 {
221 Status = AE_NO_MEMORY;
222 goto UnlockAndExit;
223 }
224
225 /*
226 * Convert value string from table entry to
227 * internal representation. Only types actually
228 * used for initial values are implemented here.
229 */
230 switch (InitVal->Type)
231 {
232 case ACPI_TYPE_METHOD:
233 ObjDesc->Method.ParamCount =
234 (UINT8) ACPI_STRTOUL (Val, NULL, 10);
235 ObjDesc->Common.Flags |= AOPOBJ_DATA_VALID;
236
237#if defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY)
238
239 /* Compiler cheats by putting parameter count in the OwnerID */
240
241 NewNode->OwnerId = ObjDesc->Method.ParamCount;
242#endif
243 break;
244
245 case ACPI_TYPE_INTEGER:
246
247 ObjDesc->Integer.Value =
248 (ACPI_INTEGER) ACPI_STRTOUL (Val, NULL, 10);
249 break;
250
251
252 case ACPI_TYPE_STRING:
253
254 /*
255 * Build an object around the static string
256 */
257 ObjDesc->String.Length = (UINT32) ACPI_STRLEN (Val);
258 ObjDesc->String.Pointer = Val;
259 ObjDesc->Common.Flags |= AOPOBJ_STATIC_POINTER;
260 break;
261
262
263 case ACPI_TYPE_MUTEX:
264
265 ObjDesc->Mutex.Node = NewNode;
266 ObjDesc->Mutex.SyncLevel =
267 (UINT16) ACPI_STRTOUL (Val, NULL, 10);
268
269 if (ACPI_STRCMP (InitVal->Name, "_GL_") == 0)
270 {
271 /*
272 * Create a counting semaphore for the
273 * global lock
274 */
275 Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT,
276 1, &ObjDesc->Mutex.Semaphore);
277 if (ACPI_FAILURE (Status))
278 {
279 goto UnlockAndExit;
280 }
281
282 /*
283 * We just created the mutex for the
284 * global lock, save it
285 */
286 AcpiGbl_GlobalLockSemaphore = ObjDesc->Mutex.Semaphore;
287 }
288 else
289 {
290 /* Create a mutex */
291
292 Status = AcpiOsCreateSemaphore (1, 1,
293 &ObjDesc->Mutex.Semaphore);
294 if (ACPI_FAILURE (Status))
295 {
296 goto UnlockAndExit;
297 }
298 }
299 break;
300
301
302 default:
303 ACPI_REPORT_ERROR (("Unsupported initial type value %X\n",
304 InitVal->Type));
305 AcpiUtRemoveReference (ObjDesc);
306 ObjDesc = NULL;
307 continue;
308 }
309
310 /* Store pointer to value descriptor in the Node */
311
312 Status = AcpiNsAttachObject (NewNode, ObjDesc, ACPI_GET_OBJECT_TYPE (ObjDesc));
313
314 /* Remove local reference to the object */
315
316 AcpiUtRemoveReference (ObjDesc);
317 }
318 }
319
320
321UnlockAndExit:
322 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
323 return_ACPI_STATUS (Status);
324}
325
326
327/*******************************************************************************
328 *
329 * FUNCTION: AcpiNsLookup
330 *
331 * PARAMETERS: PrefixNode - Search scope if name is not fully qualified
332 * Pathname - Search pathname, in internal format
333 * (as represented in the AML stream)
334 * Type - Type associated with name
335 * InterpreterMode - IMODE_LOAD_PASS2 => add name if not found
336 * Flags - Flags describing the search restrictions
337 * WalkState - Current state of the walk
338 * ReturnNode - Where the Node is placed (if found
339 * or created successfully)
340 *
341 * RETURN: Status
342 *
343 * DESCRIPTION: Find or enter the passed name in the name space.
344 * Log an error if name not found in Exec mode.
345 *
346 * MUTEX: Assumes namespace is locked.
347 *
348 ******************************************************************************/
349
350ACPI_STATUS
351AcpiNsLookup (
352 ACPI_GENERIC_STATE *ScopeInfo,
353 char *Pathname,
354 ACPI_OBJECT_TYPE Type,
355 ACPI_INTERPRETER_MODE InterpreterMode,
356 UINT32 Flags,
357 ACPI_WALK_STATE *WalkState,
358 ACPI_NAMESPACE_NODE **ReturnNode)
359{
360 ACPI_STATUS Status;
361 char *Path = Pathname;
362 ACPI_NAMESPACE_NODE *PrefixNode;
363 ACPI_NAMESPACE_NODE *CurrentNode = NULL;
364 ACPI_NAMESPACE_NODE *ThisNode = NULL;
365 UINT32 NumSegments;
366 UINT32 NumCarats;
367 ACPI_NAME SimpleName;
368 ACPI_OBJECT_TYPE TypeToCheckFor;
369 ACPI_OBJECT_TYPE ThisSearchType;
370 UINT32 SearchParentFlag = ACPI_NS_SEARCH_PARENT;
371 UINT32 LocalFlags = Flags & ~(ACPI_NS_ERROR_IF_FOUND |
372 ACPI_NS_SEARCH_PARENT);
373
374
375 ACPI_FUNCTION_TRACE ("NsLookup");
376
377
378 if (!ReturnNode)
379 {
380 return_ACPI_STATUS (AE_BAD_PARAMETER);
381 }
382
383 AcpiGbl_NsLookupCount++;
384 *ReturnNode = ACPI_ENTRY_NOT_FOUND;
385
386 if (!AcpiGbl_RootNode)
387 {
388 return_ACPI_STATUS (AE_NO_NAMESPACE);
389 }
390
391 /*
392 * Get the prefix scope.
393 * A null scope means use the root scope
394 */
395 if ((!ScopeInfo) ||
396 (!ScopeInfo->Scope.Node))
397 {
398 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
399 "Null scope prefix, using root node (%p)\n",
400 AcpiGbl_RootNode));
401
402 PrefixNode = AcpiGbl_RootNode;
403 }
404 else
405 {
406 PrefixNode = ScopeInfo->Scope.Node;
407 if (ACPI_GET_DESCRIPTOR_TYPE (PrefixNode) != ACPI_DESC_TYPE_NAMED)
408 {
| 13 * All rights reserved.
14 *
15 * 2. License
16 *
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
20 * property rights.
21 *
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
28 *
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;
37 *
38 * The above copyright and patent license is granted only if the following
39 * conditions are met:
40 *
41 * 3. Conditions
42 *
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.
54 *
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
65 * make.
66 *
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
71 * distribution.
72 *
73 * 3.4. Intel retains all right, title, and interest in and to the Original
74 * Intel Code.
75 *
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.
80 *
81 * 4. Disclaimer and Export Compliance
82 *
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
89 * PARTICULAR PURPOSE.
90 *
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
98 * LIMITED REMEDY.
99 *
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.
114 *
115 *****************************************************************************/
116
117#define __NSACCESS_C__
118
119#include "acpi.h"
120#include "amlcode.h"
121#include "acnamesp.h"
122#include "acdispat.h"
123
124
125#define _COMPONENT ACPI_NAMESPACE
126 ACPI_MODULE_NAME ("nsaccess")
127
128
129/*******************************************************************************
130 *
131 * FUNCTION: AcpiNsRootInitialize
132 *
133 * PARAMETERS: None
134 *
135 * RETURN: Status
136 *
137 * DESCRIPTION: Allocate and initialize the default root named objects
138 *
139 * MUTEX: Locks namespace for entire execution
140 *
141 ******************************************************************************/
142
143ACPI_STATUS
144AcpiNsRootInitialize (void)
145{
146 ACPI_STATUS Status;
147 const ACPI_PREDEFINED_NAMES *InitVal = NULL;
148 ACPI_NAMESPACE_NODE *NewNode;
149 ACPI_OPERAND_OBJECT *ObjDesc;
150 ACPI_STRING Val = NULL;
151
152
153 ACPI_FUNCTION_TRACE ("NsRootInitialize");
154
155
156 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
157 if (ACPI_FAILURE (Status))
158 {
159 return_ACPI_STATUS (Status);
160 }
161
162 /*
163 * The global root ptr is initially NULL, so a non-NULL value indicates
164 * that AcpiNsRootInitialize() has already been called; just return.
165 */
166 if (AcpiGbl_RootNode)
167 {
168 Status = AE_OK;
169 goto UnlockAndExit;
170 }
171
172 /*
173 * Tell the rest of the subsystem that the root is initialized
174 * (This is OK because the namespace is locked)
175 */
176 AcpiGbl_RootNode = &AcpiGbl_RootNodeStruct;
177
178 /* Enter the pre-defined names in the name table */
179
180 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
181 "Entering predefined entries into namespace\n"));
182
183 for (InitVal = AcpiGbl_PreDefinedNames; InitVal->Name; InitVal++)
184 {
185 Status = AcpiNsLookup (NULL, InitVal->Name, InitVal->Type,
186 ACPI_IMODE_LOAD_PASS2, ACPI_NS_NO_UPSEARCH, NULL, &NewNode);
187
188 if (ACPI_FAILURE (Status) || (!NewNode)) /* Must be on same line for code converter */
189 {
190 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
191 "Could not create predefined name %s, %s\n",
192 InitVal->Name, AcpiFormatException (Status)));
193 }
194
195 /*
196 * Name entered successfully.
197 * If entry in PreDefinedNames[] specifies an
198 * initial value, create the initial value.
199 */
200 if (InitVal->Val)
201 {
202 Status = AcpiOsPredefinedOverride (InitVal, &Val);
203 if (ACPI_FAILURE (Status))
204 {
205 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not override predefined %s\n",
206 InitVal->Name));
207 }
208
209 if (!Val)
210 {
211 Val = InitVal->Val;
212 }
213
214 /*
215 * Entry requests an initial value, allocate a
216 * descriptor for it.
217 */
218 ObjDesc = AcpiUtCreateInternalObject (InitVal->Type);
219 if (!ObjDesc)
220 {
221 Status = AE_NO_MEMORY;
222 goto UnlockAndExit;
223 }
224
225 /*
226 * Convert value string from table entry to
227 * internal representation. Only types actually
228 * used for initial values are implemented here.
229 */
230 switch (InitVal->Type)
231 {
232 case ACPI_TYPE_METHOD:
233 ObjDesc->Method.ParamCount =
234 (UINT8) ACPI_STRTOUL (Val, NULL, 10);
235 ObjDesc->Common.Flags |= AOPOBJ_DATA_VALID;
236
237#if defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY)
238
239 /* Compiler cheats by putting parameter count in the OwnerID */
240
241 NewNode->OwnerId = ObjDesc->Method.ParamCount;
242#endif
243 break;
244
245 case ACPI_TYPE_INTEGER:
246
247 ObjDesc->Integer.Value =
248 (ACPI_INTEGER) ACPI_STRTOUL (Val, NULL, 10);
249 break;
250
251
252 case ACPI_TYPE_STRING:
253
254 /*
255 * Build an object around the static string
256 */
257 ObjDesc->String.Length = (UINT32) ACPI_STRLEN (Val);
258 ObjDesc->String.Pointer = Val;
259 ObjDesc->Common.Flags |= AOPOBJ_STATIC_POINTER;
260 break;
261
262
263 case ACPI_TYPE_MUTEX:
264
265 ObjDesc->Mutex.Node = NewNode;
266 ObjDesc->Mutex.SyncLevel =
267 (UINT16) ACPI_STRTOUL (Val, NULL, 10);
268
269 if (ACPI_STRCMP (InitVal->Name, "_GL_") == 0)
270 {
271 /*
272 * Create a counting semaphore for the
273 * global lock
274 */
275 Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT,
276 1, &ObjDesc->Mutex.Semaphore);
277 if (ACPI_FAILURE (Status))
278 {
279 goto UnlockAndExit;
280 }
281
282 /*
283 * We just created the mutex for the
284 * global lock, save it
285 */
286 AcpiGbl_GlobalLockSemaphore = ObjDesc->Mutex.Semaphore;
287 }
288 else
289 {
290 /* Create a mutex */
291
292 Status = AcpiOsCreateSemaphore (1, 1,
293 &ObjDesc->Mutex.Semaphore);
294 if (ACPI_FAILURE (Status))
295 {
296 goto UnlockAndExit;
297 }
298 }
299 break;
300
301
302 default:
303 ACPI_REPORT_ERROR (("Unsupported initial type value %X\n",
304 InitVal->Type));
305 AcpiUtRemoveReference (ObjDesc);
306 ObjDesc = NULL;
307 continue;
308 }
309
310 /* Store pointer to value descriptor in the Node */
311
312 Status = AcpiNsAttachObject (NewNode, ObjDesc, ACPI_GET_OBJECT_TYPE (ObjDesc));
313
314 /* Remove local reference to the object */
315
316 AcpiUtRemoveReference (ObjDesc);
317 }
318 }
319
320
321UnlockAndExit:
322 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
323 return_ACPI_STATUS (Status);
324}
325
326
327/*******************************************************************************
328 *
329 * FUNCTION: AcpiNsLookup
330 *
331 * PARAMETERS: PrefixNode - Search scope if name is not fully qualified
332 * Pathname - Search pathname, in internal format
333 * (as represented in the AML stream)
334 * Type - Type associated with name
335 * InterpreterMode - IMODE_LOAD_PASS2 => add name if not found
336 * Flags - Flags describing the search restrictions
337 * WalkState - Current state of the walk
338 * ReturnNode - Where the Node is placed (if found
339 * or created successfully)
340 *
341 * RETURN: Status
342 *
343 * DESCRIPTION: Find or enter the passed name in the name space.
344 * Log an error if name not found in Exec mode.
345 *
346 * MUTEX: Assumes namespace is locked.
347 *
348 ******************************************************************************/
349
350ACPI_STATUS
351AcpiNsLookup (
352 ACPI_GENERIC_STATE *ScopeInfo,
353 char *Pathname,
354 ACPI_OBJECT_TYPE Type,
355 ACPI_INTERPRETER_MODE InterpreterMode,
356 UINT32 Flags,
357 ACPI_WALK_STATE *WalkState,
358 ACPI_NAMESPACE_NODE **ReturnNode)
359{
360 ACPI_STATUS Status;
361 char *Path = Pathname;
362 ACPI_NAMESPACE_NODE *PrefixNode;
363 ACPI_NAMESPACE_NODE *CurrentNode = NULL;
364 ACPI_NAMESPACE_NODE *ThisNode = NULL;
365 UINT32 NumSegments;
366 UINT32 NumCarats;
367 ACPI_NAME SimpleName;
368 ACPI_OBJECT_TYPE TypeToCheckFor;
369 ACPI_OBJECT_TYPE ThisSearchType;
370 UINT32 SearchParentFlag = ACPI_NS_SEARCH_PARENT;
371 UINT32 LocalFlags = Flags & ~(ACPI_NS_ERROR_IF_FOUND |
372 ACPI_NS_SEARCH_PARENT);
373
374
375 ACPI_FUNCTION_TRACE ("NsLookup");
376
377
378 if (!ReturnNode)
379 {
380 return_ACPI_STATUS (AE_BAD_PARAMETER);
381 }
382
383 AcpiGbl_NsLookupCount++;
384 *ReturnNode = ACPI_ENTRY_NOT_FOUND;
385
386 if (!AcpiGbl_RootNode)
387 {
388 return_ACPI_STATUS (AE_NO_NAMESPACE);
389 }
390
391 /*
392 * Get the prefix scope.
393 * A null scope means use the root scope
394 */
395 if ((!ScopeInfo) ||
396 (!ScopeInfo->Scope.Node))
397 {
398 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
399 "Null scope prefix, using root node (%p)\n",
400 AcpiGbl_RootNode));
401
402 PrefixNode = AcpiGbl_RootNode;
403 }
404 else
405 {
406 PrefixNode = ScopeInfo->Scope.Node;
407 if (ACPI_GET_DESCRIPTOR_TYPE (PrefixNode) != ACPI_DESC_TYPE_NAMED)
408 {
|
410 PrefixNode, AcpiUtGetDescriptorName (PrefixNode)));
411 return_ACPI_STATUS (AE_AML_INTERNAL);
412 }
413
414 /*
415 * This node might not be a actual "scope" node (such as a
416 * Device/Method, etc.) It could be a Package or other object node.
417 * Backup up the tree to find the containing scope node.
418 */
419 while (!AcpiNsOpensScope (PrefixNode->Type) &&
420 PrefixNode->Type != ACPI_TYPE_ANY)
421 {
422 PrefixNode = AcpiNsGetParentNode (PrefixNode);
423 }
424 }
425
426 /* Save type TBD: may be no longer necessary */
427
428 TypeToCheckFor = Type;
429
430 /*
431 * Begin examination of the actual pathname
432 */
433 if (!Pathname)
434 {
435 /* A Null NamePath is allowed and refers to the root */
436
437 NumSegments = 0;
438 ThisNode = AcpiGbl_RootNode;
439 Path = "";
440
441 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
442 "Null Pathname (Zero segments), Flags=%X\n", Flags));
443 }
444 else
445 {
446 /*
447 * Name pointer is valid (and must be in internal name format)
448 *
449 * Check for scope prefixes:
450 *
451 * As represented in the AML stream, a namepath consists of an
452 * optional scope prefix followed by a name segment part.
453 *
454 * If present, the scope prefix is either a Root Prefix (in
455 * which case the name is fully qualified), or one or more
456 * Parent Prefixes (in which case the name's scope is relative
457 * to the current scope).
458 */
459 if (*Path == (UINT8) AML_ROOT_PREFIX)
460 {
461 /* Pathname is fully qualified, start from the root */
462
463 ThisNode = AcpiGbl_RootNode;
464 SearchParentFlag = ACPI_NS_NO_UPSEARCH;
465
466 /* Point to name segment part */
467
468 Path++;
469
470 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
471 "Path is absolute from root [%p]\n", ThisNode));
472 }
473 else
474 {
475 /* Pathname is relative to current scope, start there */
476
477 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
478 "Searching relative to prefix scope [%4.4s] (%p)\n",
479 AcpiUtGetNodeName (PrefixNode), PrefixNode));
480
481 /*
482 * Handle multiple Parent Prefixes (carat) by just getting
483 * the parent node for each prefix instance.
484 */
485 ThisNode = PrefixNode;
486 NumCarats = 0;
487 while (*Path == (UINT8) AML_PARENT_PREFIX)
488 {
489 /* Name is fully qualified, no search rules apply */
490
491 SearchParentFlag = ACPI_NS_NO_UPSEARCH;
492 /*
493 * Point past this prefix to the name segment
494 * part or the next Parent Prefix
495 */
496 Path++;
497
498 /* Backup to the parent node */
499
500 NumCarats++;
501 ThisNode = AcpiNsGetParentNode (ThisNode);
502 if (!ThisNode)
503 {
504 /* Current scope has no parent scope */
505
506 ACPI_REPORT_ERROR (
507 ("ACPI path has too many parent prefixes (^) - reached beyond root node\n"));
508 return_ACPI_STATUS (AE_NOT_FOUND);
509 }
510 }
511
512 if (SearchParentFlag == ACPI_NS_NO_UPSEARCH)
513 {
514 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
515 "Search scope is [%4.4s], path has %d carat(s)\n",
516 AcpiUtGetNodeName (ThisNode), NumCarats));
517 }
518 }
519
520 /*
521 * Determine the number of ACPI name segments in this pathname.
522 *
523 * The segment part consists of either:
524 * - A Null name segment (0)
525 * - A DualNamePrefix followed by two 4-byte name segments
526 * - A MultiNamePrefix followed by a byte indicating the
527 * number of segments and the segments themselves.
528 * - A single 4-byte name segment
529 *
530 * Examine the name prefix opcode, if any, to determine the number of
531 * segments.
532 */
533 switch (*Path)
534 {
535 case 0:
536 /*
537 * Null name after a root or parent prefixes. We already
538 * have the correct target node and there are no name segments.
539 */
540 NumSegments = 0;
541 Type = ThisNode->Type;
542
543 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
544 "Prefix-only Pathname (Zero name segments), Flags=%X\n", Flags));
545 break;
546
547 case AML_DUAL_NAME_PREFIX:
548
549 /* More than one NameSeg, search rules do not apply */
550
551 SearchParentFlag = ACPI_NS_NO_UPSEARCH;
552
553 /* Two segments, point to first name segment */
554
555 NumSegments = 2;
556 Path++;
557
558 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
559 "Dual Pathname (2 segments, Flags=%X)\n", Flags));
560 break;
561
562 case AML_MULTI_NAME_PREFIX_OP:
563
564 /* More than one NameSeg, search rules do not apply */
565
566 SearchParentFlag = ACPI_NS_NO_UPSEARCH;
567
568 /* Extract segment count, point to first name segment */
569
570 Path++;
571 NumSegments = (UINT32) (UINT8) *Path;
572 Path++;
573
574 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
575 "Multi Pathname (%d Segments, Flags=%X) \n",
576 NumSegments, Flags));
577 break;
578
579 default:
580 /*
581 * Not a Null name, no Dual or Multi prefix, hence there is
582 * only one name segment and Pathname is already pointing to it.
583 */
584 NumSegments = 1;
585
586 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
587 "Simple Pathname (1 segment, Flags=%X)\n", Flags));
588 break;
589 }
590
591 ACPI_DEBUG_EXEC (AcpiNsPrintPathname (NumSegments, Path));
592 }
593
594
595 /*
596 * Search namespace for each segment of the name. Loop through and
597 * verify (or add to the namespace) each name segment.
598 *
599 * The object type is significant only at the last name
600 * segment. (We don't care about the types along the path, only
601 * the type of the final target object.)
602 */
603 ThisSearchType = ACPI_TYPE_ANY;
604 CurrentNode = ThisNode;
605 while (NumSegments && CurrentNode)
606 {
607 NumSegments--;
608 if (!NumSegments)
609 {
610 /*
611 * This is the last segment, enable typechecking
612 */
613 ThisSearchType = Type;
614
615 /*
616 * Only allow automatic parent search (search rules) if the caller
617 * requested it AND we have a single, non-fully-qualified NameSeg
618 */
619 if ((SearchParentFlag != ACPI_NS_NO_UPSEARCH) &&
620 (Flags & ACPI_NS_SEARCH_PARENT))
621 {
622 LocalFlags |= ACPI_NS_SEARCH_PARENT;
623 }
624
625 /* Set error flag according to caller */
626
627 if (Flags & ACPI_NS_ERROR_IF_FOUND)
628 {
629 LocalFlags |= ACPI_NS_ERROR_IF_FOUND;
630 }
631 }
632
633 /* Extract one ACPI name from the front of the pathname */
634
635 ACPI_MOVE_32_TO_32 (&SimpleName, Path);
636
637 /* Try to find the single (4 character) ACPI name */
638
639 Status = AcpiNsSearchAndEnter (SimpleName, WalkState, CurrentNode,
640 InterpreterMode, ThisSearchType, LocalFlags, &ThisNode);
641 if (ACPI_FAILURE (Status))
642 {
643 if (Status == AE_NOT_FOUND)
644 {
645 /* Name not found in ACPI namespace */
646
647 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
648 "Name [%4.4s] not found in scope [%4.4s] %p\n",
649 (char *) &SimpleName, (char *) &CurrentNode->Name,
650 CurrentNode));
651 }
652
653 *ReturnNode = ThisNode;
654 return_ACPI_STATUS (Status);
655 }
656
657 /*
658 * Sanity typecheck of the target object:
659 *
660 * If 1) This is the last segment (NumSegments == 0)
661 * 2) And we are looking for a specific type
662 * (Not checking for TYPE_ANY)
663 * 3) Which is not an alias
664 * 4) Which is not a local type (TYPE_SCOPE)
665 * 5) And the type of target object is known (not TYPE_ANY)
666 * 6) And target object does not match what we are looking for
667 *
668 * Then we have a type mismatch. Just warn and ignore it.
669 */
670 if ((NumSegments == 0) &&
671 (TypeToCheckFor != ACPI_TYPE_ANY) &&
672 (TypeToCheckFor != ACPI_TYPE_LOCAL_ALIAS) &&
673 (TypeToCheckFor != ACPI_TYPE_LOCAL_SCOPE) &&
674 (ThisNode->Type != ACPI_TYPE_ANY) &&
675 (ThisNode->Type != TypeToCheckFor))
676 {
677 /* Complain about a type mismatch */
678
679 ACPI_REPORT_WARNING (
680 ("NsLookup: Type mismatch on %4.4s (%s), searching for (%s)\n",
681 (char *) &SimpleName, AcpiUtGetTypeName (ThisNode->Type),
682 AcpiUtGetTypeName (TypeToCheckFor)));
683 }
684
685 /*
686 * If this is the last name segment and we are not looking for a
687 * specific type, but the type of found object is known, use that type
688 * to see if it opens a scope.
689 */
690 if ((NumSegments == 0) && (Type == ACPI_TYPE_ANY))
691 {
692 Type = ThisNode->Type;
693 }
694
695 /* Point to next name segment and make this node current */
696
697 Path += ACPI_NAME_SIZE;
698 CurrentNode = ThisNode;
699 }
700
701 /*
702 * Always check if we need to open a new scope
703 */
704 if (!(Flags & ACPI_NS_DONT_OPEN_SCOPE) && (WalkState))
705 {
706 /*
707 * If entry is a type which opens a scope, push the new scope on the
708 * scope stack.
709 */
710 if (AcpiNsOpensScope (Type))
711 {
712 Status = AcpiDsScopeStackPush (ThisNode, Type, WalkState);
713 if (ACPI_FAILURE (Status))
714 {
715 return_ACPI_STATUS (Status);
716 }
717 }
718 }
719
720 *ReturnNode = ThisNode;
721 return_ACPI_STATUS (AE_OK);
722}
723
| 410 PrefixNode, AcpiUtGetDescriptorName (PrefixNode)));
411 return_ACPI_STATUS (AE_AML_INTERNAL);
412 }
413
414 /*
415 * This node might not be a actual "scope" node (such as a
416 * Device/Method, etc.) It could be a Package or other object node.
417 * Backup up the tree to find the containing scope node.
418 */
419 while (!AcpiNsOpensScope (PrefixNode->Type) &&
420 PrefixNode->Type != ACPI_TYPE_ANY)
421 {
422 PrefixNode = AcpiNsGetParentNode (PrefixNode);
423 }
424 }
425
426 /* Save type TBD: may be no longer necessary */
427
428 TypeToCheckFor = Type;
429
430 /*
431 * Begin examination of the actual pathname
432 */
433 if (!Pathname)
434 {
435 /* A Null NamePath is allowed and refers to the root */
436
437 NumSegments = 0;
438 ThisNode = AcpiGbl_RootNode;
439 Path = "";
440
441 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
442 "Null Pathname (Zero segments), Flags=%X\n", Flags));
443 }
444 else
445 {
446 /*
447 * Name pointer is valid (and must be in internal name format)
448 *
449 * Check for scope prefixes:
450 *
451 * As represented in the AML stream, a namepath consists of an
452 * optional scope prefix followed by a name segment part.
453 *
454 * If present, the scope prefix is either a Root Prefix (in
455 * which case the name is fully qualified), or one or more
456 * Parent Prefixes (in which case the name's scope is relative
457 * to the current scope).
458 */
459 if (*Path == (UINT8) AML_ROOT_PREFIX)
460 {
461 /* Pathname is fully qualified, start from the root */
462
463 ThisNode = AcpiGbl_RootNode;
464 SearchParentFlag = ACPI_NS_NO_UPSEARCH;
465
466 /* Point to name segment part */
467
468 Path++;
469
470 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
471 "Path is absolute from root [%p]\n", ThisNode));
472 }
473 else
474 {
475 /* Pathname is relative to current scope, start there */
476
477 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
478 "Searching relative to prefix scope [%4.4s] (%p)\n",
479 AcpiUtGetNodeName (PrefixNode), PrefixNode));
480
481 /*
482 * Handle multiple Parent Prefixes (carat) by just getting
483 * the parent node for each prefix instance.
484 */
485 ThisNode = PrefixNode;
486 NumCarats = 0;
487 while (*Path == (UINT8) AML_PARENT_PREFIX)
488 {
489 /* Name is fully qualified, no search rules apply */
490
491 SearchParentFlag = ACPI_NS_NO_UPSEARCH;
492 /*
493 * Point past this prefix to the name segment
494 * part or the next Parent Prefix
495 */
496 Path++;
497
498 /* Backup to the parent node */
499
500 NumCarats++;
501 ThisNode = AcpiNsGetParentNode (ThisNode);
502 if (!ThisNode)
503 {
504 /* Current scope has no parent scope */
505
506 ACPI_REPORT_ERROR (
507 ("ACPI path has too many parent prefixes (^) - reached beyond root node\n"));
508 return_ACPI_STATUS (AE_NOT_FOUND);
509 }
510 }
511
512 if (SearchParentFlag == ACPI_NS_NO_UPSEARCH)
513 {
514 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
515 "Search scope is [%4.4s], path has %d carat(s)\n",
516 AcpiUtGetNodeName (ThisNode), NumCarats));
517 }
518 }
519
520 /*
521 * Determine the number of ACPI name segments in this pathname.
522 *
523 * The segment part consists of either:
524 * - A Null name segment (0)
525 * - A DualNamePrefix followed by two 4-byte name segments
526 * - A MultiNamePrefix followed by a byte indicating the
527 * number of segments and the segments themselves.
528 * - A single 4-byte name segment
529 *
530 * Examine the name prefix opcode, if any, to determine the number of
531 * segments.
532 */
533 switch (*Path)
534 {
535 case 0:
536 /*
537 * Null name after a root or parent prefixes. We already
538 * have the correct target node and there are no name segments.
539 */
540 NumSegments = 0;
541 Type = ThisNode->Type;
542
543 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
544 "Prefix-only Pathname (Zero name segments), Flags=%X\n", Flags));
545 break;
546
547 case AML_DUAL_NAME_PREFIX:
548
549 /* More than one NameSeg, search rules do not apply */
550
551 SearchParentFlag = ACPI_NS_NO_UPSEARCH;
552
553 /* Two segments, point to first name segment */
554
555 NumSegments = 2;
556 Path++;
557
558 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
559 "Dual Pathname (2 segments, Flags=%X)\n", Flags));
560 break;
561
562 case AML_MULTI_NAME_PREFIX_OP:
563
564 /* More than one NameSeg, search rules do not apply */
565
566 SearchParentFlag = ACPI_NS_NO_UPSEARCH;
567
568 /* Extract segment count, point to first name segment */
569
570 Path++;
571 NumSegments = (UINT32) (UINT8) *Path;
572 Path++;
573
574 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
575 "Multi Pathname (%d Segments, Flags=%X) \n",
576 NumSegments, Flags));
577 break;
578
579 default:
580 /*
581 * Not a Null name, no Dual or Multi prefix, hence there is
582 * only one name segment and Pathname is already pointing to it.
583 */
584 NumSegments = 1;
585
586 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
587 "Simple Pathname (1 segment, Flags=%X)\n", Flags));
588 break;
589 }
590
591 ACPI_DEBUG_EXEC (AcpiNsPrintPathname (NumSegments, Path));
592 }
593
594
595 /*
596 * Search namespace for each segment of the name. Loop through and
597 * verify (or add to the namespace) each name segment.
598 *
599 * The object type is significant only at the last name
600 * segment. (We don't care about the types along the path, only
601 * the type of the final target object.)
602 */
603 ThisSearchType = ACPI_TYPE_ANY;
604 CurrentNode = ThisNode;
605 while (NumSegments && CurrentNode)
606 {
607 NumSegments--;
608 if (!NumSegments)
609 {
610 /*
611 * This is the last segment, enable typechecking
612 */
613 ThisSearchType = Type;
614
615 /*
616 * Only allow automatic parent search (search rules) if the caller
617 * requested it AND we have a single, non-fully-qualified NameSeg
618 */
619 if ((SearchParentFlag != ACPI_NS_NO_UPSEARCH) &&
620 (Flags & ACPI_NS_SEARCH_PARENT))
621 {
622 LocalFlags |= ACPI_NS_SEARCH_PARENT;
623 }
624
625 /* Set error flag according to caller */
626
627 if (Flags & ACPI_NS_ERROR_IF_FOUND)
628 {
629 LocalFlags |= ACPI_NS_ERROR_IF_FOUND;
630 }
631 }
632
633 /* Extract one ACPI name from the front of the pathname */
634
635 ACPI_MOVE_32_TO_32 (&SimpleName, Path);
636
637 /* Try to find the single (4 character) ACPI name */
638
639 Status = AcpiNsSearchAndEnter (SimpleName, WalkState, CurrentNode,
640 InterpreterMode, ThisSearchType, LocalFlags, &ThisNode);
641 if (ACPI_FAILURE (Status))
642 {
643 if (Status == AE_NOT_FOUND)
644 {
645 /* Name not found in ACPI namespace */
646
647 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
648 "Name [%4.4s] not found in scope [%4.4s] %p\n",
649 (char *) &SimpleName, (char *) &CurrentNode->Name,
650 CurrentNode));
651 }
652
653 *ReturnNode = ThisNode;
654 return_ACPI_STATUS (Status);
655 }
656
657 /*
658 * Sanity typecheck of the target object:
659 *
660 * If 1) This is the last segment (NumSegments == 0)
661 * 2) And we are looking for a specific type
662 * (Not checking for TYPE_ANY)
663 * 3) Which is not an alias
664 * 4) Which is not a local type (TYPE_SCOPE)
665 * 5) And the type of target object is known (not TYPE_ANY)
666 * 6) And target object does not match what we are looking for
667 *
668 * Then we have a type mismatch. Just warn and ignore it.
669 */
670 if ((NumSegments == 0) &&
671 (TypeToCheckFor != ACPI_TYPE_ANY) &&
672 (TypeToCheckFor != ACPI_TYPE_LOCAL_ALIAS) &&
673 (TypeToCheckFor != ACPI_TYPE_LOCAL_SCOPE) &&
674 (ThisNode->Type != ACPI_TYPE_ANY) &&
675 (ThisNode->Type != TypeToCheckFor))
676 {
677 /* Complain about a type mismatch */
678
679 ACPI_REPORT_WARNING (
680 ("NsLookup: Type mismatch on %4.4s (%s), searching for (%s)\n",
681 (char *) &SimpleName, AcpiUtGetTypeName (ThisNode->Type),
682 AcpiUtGetTypeName (TypeToCheckFor)));
683 }
684
685 /*
686 * If this is the last name segment and we are not looking for a
687 * specific type, but the type of found object is known, use that type
688 * to see if it opens a scope.
689 */
690 if ((NumSegments == 0) && (Type == ACPI_TYPE_ANY))
691 {
692 Type = ThisNode->Type;
693 }
694
695 /* Point to next name segment and make this node current */
696
697 Path += ACPI_NAME_SIZE;
698 CurrentNode = ThisNode;
699 }
700
701 /*
702 * Always check if we need to open a new scope
703 */
704 if (!(Flags & ACPI_NS_DONT_OPEN_SCOPE) && (WalkState))
705 {
706 /*
707 * If entry is a type which opens a scope, push the new scope on the
708 * scope stack.
709 */
710 if (AcpiNsOpensScope (Type))
711 {
712 Status = AcpiDsScopeStackPush (ThisNode, Type, WalkState);
713 if (ACPI_FAILURE (Status))
714 {
715 return_ACPI_STATUS (Status);
716 }
717 }
718 }
719
720 *ReturnNode = ThisNode;
721 return_ACPI_STATUS (AE_OK);
722}
723
|