1 /*******************************************************************************
2 *
3 * Module Name: utstate - state object support procedures
4 *
5 ******************************************************************************/
6
7 /******************************************************************************
8 *
9 * 1. Copyright Notice
10 *
11 * Some or all of this work - Copyright (c) 1999 - 2018, Intel Corp.
12 * All rights reserved.
13 *
14 * 2. License
15 *
16 * 2.1. This is your license from Intel Corp. under its intellectual property
17 * rights. You may have additional license terms from the party that provided
18 * you this software, covering your right to use that party's intellectual
19 * property rights.
20 *
21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22 * copy of the source code appearing in this file ("Covered Code") an
23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24 * base code distributed originally by Intel ("Original Intel Code") to copy,
25 * make derivatives, distribute, use and display any portion of the Covered
26 * Code in any form, with the right to sublicense such rights; and
27 *
28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29 * license (with the right to sublicense), under only those claims of Intel
30 * patents that are infringed by the Original Intel Code, to make, use, sell,
31 * offer to sell, and import the Covered Code and derivative works thereof
32 * solely to the minimum extent necessary to exercise the above copyright
33 * license, and in no event shall the patent license extend to any additions
34 * to or modifications of the Original Intel Code. No other license or right
35 * is granted directly or by implication, estoppel or otherwise;
36 *
37 * The above copyright and patent license is granted only if the following
38 * conditions are met:
39 *
40 * 3. Conditions
41 *
42 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43 * Redistribution of source code of any substantial portion of the Covered
44 * Code or modification with rights to further distribute source must include
45 * the above Copyright Notice, the above License, this list of Conditions,
46 * and the following Disclaimer and Export Compliance provision. In addition,
47 * Licensee must cause all Covered Code to which Licensee contributes to
48 * contain a file documenting the changes Licensee made to create that Covered
49 * Code and the date of any change. Licensee must include in that file the
50 * documentation of any changes made by any predecessor Licensee. Licensee
51 * must include a prominent statement that the modification is derived,
52 * directly or indirectly, from Original Intel Code.
53 *
54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55 * Redistribution of source code of any substantial portion of the Covered
56 * Code or modification without rights to further distribute source must
57 * include the following Disclaimer and Export Compliance provision in the
58 * documentation and/or other materials provided with distribution. In
59 * addition, Licensee may not authorize further sublicense of source of any
60 * portion of the Covered Code, and must include terms to the effect that the
61 * license from Licensee to its licensee is limited to the intellectual
62 * property embodied in the software Licensee provides to its licensee, and
63 * not to intellectual property embodied in modifications its licensee may
64 * make.
65 *
66 * 3.3. Redistribution of Executable. Redistribution in executable form of any
67 * substantial portion of the Covered Code or modification must reproduce the
68 * above Copyright Notice, and the following Disclaimer and Export Compliance
69 * provision in the documentation and/or other materials provided with the
70 * distribution.
71 *
72 * 3.4. Intel retains all right, title, and interest in and to the Original
73 * Intel Code.
74 *
75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76 * Intel shall be used in advertising or otherwise to promote the sale, use or
77 * other dealings in products derived from or relating to the Covered Code
78 * without prior written authorization from Intel.
79 *
80 * 4. Disclaimer and Export Compliance
81 *
82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
88 * PARTICULAR PURPOSE.
89 *
90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
97 * LIMITED REMEDY.
98 *
99 * 4.3. Licensee shall not export, either directly or indirectly, any of this
100 * software or system incorporating such software without first obtaining any
101 * required license or other approval from the U. S. Department of Commerce or
102 * any other agency or department of the United States Government. In the
103 * event Licensee exports any such software from the United States or
104 * re-exports any such software from a foreign destination, Licensee shall
105 * ensure that the distribution and export/re-export of the software is in
106 * compliance with all laws, regulations, orders, or other restrictions of the
107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108 * any of its subsidiaries will export/re-export any technical data, process,
109 * software, or service, directly or indirectly, to any country for which the
110 * United States government or any agency thereof requires an export license,
111 * other governmental approval, or letter of assurance, without first obtaining
112 * such license, approval or letter.
113 *
114 *****************************************************************************
115 *
116 * Alternatively, you may choose to be licensed under the terms of the
117 * following license:
118 *
119 * Redistribution and use in source and binary forms, with or without
120 * modification, are permitted provided that the following conditions
121 * are met:
122 * 1. Redistributions of source code must retain the above copyright
123 * notice, this list of conditions, and the following disclaimer,
124 * without modification.
125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
126 * substantially similar to the "NO WARRANTY" disclaimer below
127 * ("Disclaimer") and any redistribution must be conditioned upon
128 * including a substantially similar Disclaimer requirement for further
129 * binary redistribution.
130 * 3. Neither the names of the above-listed copyright holders nor the names
131 * of any contributors may be used to endorse or promote products derived
132 * from this software without specific prior written permission.
133 *
134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
145 *
146 * Alternatively, you may choose to be licensed under the terms of the
147 * GNU General Public License ("GPL") version 2 as published by the Free
148 * Software Foundation.
149 *
150 *****************************************************************************/
151
152 #include "acpi.h"
153 #include "accommon.h"
154
155 #define _COMPONENT ACPI_UTILITIES
156 ACPI_MODULE_NAME ("utstate")
157
158
159 /*******************************************************************************
160 *
161 * FUNCTION: AcpiUtPushGenericState
162 *
163 * PARAMETERS: ListHead - Head of the state stack
164 * State - State object to push
165 *
166 * RETURN: None
167 *
168 * DESCRIPTION: Push a state object onto a state stack
169 *
170 ******************************************************************************/
171
172 void
AcpiUtPushGenericState(ACPI_GENERIC_STATE ** ListHead,ACPI_GENERIC_STATE * State)173 AcpiUtPushGenericState (
174 ACPI_GENERIC_STATE **ListHead,
175 ACPI_GENERIC_STATE *State)
176 {
177 ACPI_FUNCTION_ENTRY ();
178
179
180 /* Push the state object onto the front of the list (stack) */
181
182 State->Common.Next = *ListHead;
183 *ListHead = State;
184 return;
185 }
186
187
188 /*******************************************************************************
189 *
190 * FUNCTION: AcpiUtPopGenericState
191 *
192 * PARAMETERS: ListHead - Head of the state stack
193 *
194 * RETURN: The popped state object
195 *
196 * DESCRIPTION: Pop a state object from a state stack
197 *
198 ******************************************************************************/
199
200 ACPI_GENERIC_STATE *
AcpiUtPopGenericState(ACPI_GENERIC_STATE ** ListHead)201 AcpiUtPopGenericState (
202 ACPI_GENERIC_STATE **ListHead)
203 {
204 ACPI_GENERIC_STATE *State;
205
206
207 ACPI_FUNCTION_ENTRY ();
208
209
210 /* Remove the state object at the head of the list (stack) */
211
212 State = *ListHead;
213 if (State)
214 {
215 /* Update the list head */
216
217 *ListHead = State->Common.Next;
218 }
219
220 return (State);
221 }
222
223
224 /*******************************************************************************
225 *
226 * FUNCTION: AcpiUtCreateGenericState
227 *
228 * PARAMETERS: None
229 *
230 * RETURN: The new state object. NULL on failure.
231 *
232 * DESCRIPTION: Create a generic state object. Attempt to obtain one from
233 * the global state cache; If none available, create a new one.
234 *
235 ******************************************************************************/
236
237 ACPI_GENERIC_STATE *
AcpiUtCreateGenericState(void)238 AcpiUtCreateGenericState (
239 void)
240 {
241 ACPI_GENERIC_STATE *State;
242
243
244 ACPI_FUNCTION_ENTRY ();
245
246
247 State = AcpiOsAcquireObject (AcpiGbl_StateCache);
248 if (State)
249 {
250 /* Initialize */
251 State->Common.DescriptorType = ACPI_DESC_TYPE_STATE;
252 }
253
254 return (State);
255 }
256
257
258 /*******************************************************************************
259 *
260 * FUNCTION: AcpiUtCreateThreadState
261 *
262 * PARAMETERS: None
263 *
264 * RETURN: New Thread State. NULL on failure
265 *
266 * DESCRIPTION: Create a "Thread State" - a flavor of the generic state used
267 * to track per-thread info during method execution
268 *
269 ******************************************************************************/
270
271 ACPI_THREAD_STATE *
AcpiUtCreateThreadState(void)272 AcpiUtCreateThreadState (
273 void)
274 {
275 ACPI_GENERIC_STATE *State;
276
277
278 ACPI_FUNCTION_ENTRY ();
279
280
281 /* Create the generic state object */
282
283 State = AcpiUtCreateGenericState ();
284 if (!State)
285 {
286 return (NULL);
287 }
288
289 /* Init fields specific to the update struct */
290
291 State->Common.DescriptorType = ACPI_DESC_TYPE_STATE_THREAD;
292 State->Thread.ThreadId = AcpiOsGetThreadId ();
293
294 /* Check for invalid thread ID - zero is very bad, it will break things */
295
296 if (!State->Thread.ThreadId)
297 {
298 ACPI_ERROR ((AE_INFO, "Invalid zero ID from AcpiOsGetThreadId"));
299 State->Thread.ThreadId = (ACPI_THREAD_ID) 1;
300 }
301
302 return ((ACPI_THREAD_STATE *) State);
303 }
304
305
306 /*******************************************************************************
307 *
308 * FUNCTION: AcpiUtCreateUpdateState
309 *
310 * PARAMETERS: Object - Initial Object to be installed in the state
311 * Action - Update action to be performed
312 *
313 * RETURN: New state object, null on failure
314 *
315 * DESCRIPTION: Create an "Update State" - a flavor of the generic state used
316 * to update reference counts and delete complex objects such
317 * as packages.
318 *
319 ******************************************************************************/
320
321 ACPI_GENERIC_STATE *
AcpiUtCreateUpdateState(ACPI_OPERAND_OBJECT * Object,UINT16 Action)322 AcpiUtCreateUpdateState (
323 ACPI_OPERAND_OBJECT *Object,
324 UINT16 Action)
325 {
326 ACPI_GENERIC_STATE *State;
327
328
329 ACPI_FUNCTION_ENTRY ();
330
331
332 /* Create the generic state object */
333
334 State = AcpiUtCreateGenericState ();
335 if (!State)
336 {
337 return (NULL);
338 }
339
340 /* Init fields specific to the update struct */
341
342 State->Common.DescriptorType = ACPI_DESC_TYPE_STATE_UPDATE;
343 State->Update.Object = Object;
344 State->Update.Value = Action;
345 return (State);
346 }
347
348
349 /*******************************************************************************
350 *
351 * FUNCTION: AcpiUtCreatePkgState
352 *
353 * PARAMETERS: Object - Initial Object to be installed in the state
354 * Action - Update action to be performed
355 *
356 * RETURN: New state object, null on failure
357 *
358 * DESCRIPTION: Create a "Package State"
359 *
360 ******************************************************************************/
361
362 ACPI_GENERIC_STATE *
AcpiUtCreatePkgState(void * InternalObject,void * ExternalObject,UINT32 Index)363 AcpiUtCreatePkgState (
364 void *InternalObject,
365 void *ExternalObject,
366 UINT32 Index)
367 {
368 ACPI_GENERIC_STATE *State;
369
370
371 ACPI_FUNCTION_ENTRY ();
372
373
374 /* Create the generic state object */
375
376 State = AcpiUtCreateGenericState ();
377 if (!State)
378 {
379 return (NULL);
380 }
381
382 /* Init fields specific to the update struct */
383
384 State->Common.DescriptorType = ACPI_DESC_TYPE_STATE_PACKAGE;
385 State->Pkg.SourceObject = (ACPI_OPERAND_OBJECT *) InternalObject;
386 State->Pkg.DestObject = ExternalObject;
387 State->Pkg.Index= Index;
388 State->Pkg.NumPackages = 1;
389
390 return (State);
391 }
392
393
394 /*******************************************************************************
395 *
396 * FUNCTION: AcpiUtCreateControlState
397 *
398 * PARAMETERS: None
399 *
400 * RETURN: New state object, null on failure
401 *
402 * DESCRIPTION: Create a "Control State" - a flavor of the generic state used
403 * to support nested IF/WHILE constructs in the AML.
404 *
405 ******************************************************************************/
406
407 ACPI_GENERIC_STATE *
AcpiUtCreateControlState(void)408 AcpiUtCreateControlState (
409 void)
410 {
411 ACPI_GENERIC_STATE *State;
412
413
414 ACPI_FUNCTION_ENTRY ();
415
416
417 /* Create the generic state object */
418
419 State = AcpiUtCreateGenericState ();
420 if (!State)
421 {
422 return (NULL);
423 }
424
425 /* Init fields specific to the control struct */
426
427 State->Common.DescriptorType = ACPI_DESC_TYPE_STATE_CONTROL;
428 State->Common.State = ACPI_CONTROL_CONDITIONAL_EXECUTING;
429
430 return (State);
431 }
432
433
434 /*******************************************************************************
435 *
436 * FUNCTION: AcpiUtDeleteGenericState
437 *
438 * PARAMETERS: State - The state object to be deleted
439 *
440 * RETURN: None
441 *
442 * DESCRIPTION: Release a state object to the state cache. NULL state objects
443 * are ignored.
444 *
445 ******************************************************************************/
446
447 void
AcpiUtDeleteGenericState(ACPI_GENERIC_STATE * State)448 AcpiUtDeleteGenericState (
449 ACPI_GENERIC_STATE *State)
450 {
451 ACPI_FUNCTION_ENTRY ();
452
453
454 /* Ignore null state */
455
456 if (State)
457 {
458 (void) AcpiOsReleaseObject (AcpiGbl_StateCache, State);
459 }
460
461 return;
462 }
463