14 * All rights reserved.
15 *
16 * 2. License
17 *
18 * 2.1. This is your license from Intel Corp. under its intellectual property
19 * rights. You may have additional license terms from the party that provided
20 * you this software, covering your right to use that party's intellectual
21 * property rights.
22 *
23 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
24 * copy of the source code appearing in this file ("Covered Code") an
25 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
26 * base code distributed originally by Intel ("Original Intel Code") to copy,
27 * make derivatives, distribute, use and display any portion of the Covered
28 * Code in any form, with the right to sublicense such rights; and
29 *
30 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
31 * license (with the right to sublicense), under only those claims of Intel
32 * patents that are infringed by the Original Intel Code, to make, use, sell,
33 * offer to sell, and import the Covered Code and derivative works thereof
34 * solely to the minimum extent necessary to exercise the above copyright
35 * license, and in no event shall the patent license extend to any additions
36 * to or modifications of the Original Intel Code. No other license or right
37 * is granted directly or by implication, estoppel or otherwise;
38 *
39 * The above copyright and patent license is granted only if the following
40 * conditions are met:
41 *
42 * 3. Conditions
43 *
44 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
45 * Redistribution of source code of any substantial portion of the Covered
46 * Code or modification with rights to further distribute source must include
47 * the above Copyright Notice, the above License, this list of Conditions,
48 * and the following Disclaimer and Export Compliance provision. In addition,
49 * Licensee must cause all Covered Code to which Licensee contributes to
50 * contain a file documenting the changes Licensee made to create that Covered
51 * Code and the date of any change. Licensee must include in that file the
52 * documentation of any changes made by any predecessor Licensee. Licensee
53 * must include a prominent statement that the modification is derived,
54 * directly or indirectly, from Original Intel Code.
55 *
56 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
57 * Redistribution of source code of any substantial portion of the Covered
58 * Code or modification without rights to further distribute source must
59 * include the following Disclaimer and Export Compliance provision in the
60 * documentation and/or other materials provided with distribution. In
61 * addition, Licensee may not authorize further sublicense of source of any
62 * portion of the Covered Code, and must include terms to the effect that the
63 * license from Licensee to its licensee is limited to the intellectual
64 * property embodied in the software Licensee provides to its licensee, and
65 * not to intellectual property embodied in modifications its licensee may
66 * make.
67 *
68 * 3.3. Redistribution of Executable. Redistribution in executable form of any
69 * substantial portion of the Covered Code or modification must reproduce the
70 * above Copyright Notice, and the following Disclaimer and Export Compliance
71 * provision in the documentation and/or other materials provided with the
72 * distribution.
73 *
74 * 3.4. Intel retains all right, title, and interest in and to the Original
75 * Intel Code.
76 *
77 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
78 * Intel shall be used in advertising or otherwise to promote the sale, use or
79 * other dealings in products derived from or relating to the Covered Code
80 * without prior written authorization from Intel.
81 *
82 * 4. Disclaimer and Export Compliance
83 *
84 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
85 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
86 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
87 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
88 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
89 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
90 * PARTICULAR PURPOSE.
91 *
92 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
93 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
94 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
95 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
96 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
97 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
98 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
99 * LIMITED REMEDY.
100 *
101 * 4.3. Licensee shall not export, either directly or indirectly, any of this
102 * software or system incorporating such software without first obtaining any
103 * required license or other approval from the U. S. Department of Commerce or
104 * any other agency or department of the United States Government. In the
105 * event Licensee exports any such software from the United States or
106 * re-exports any such software from a foreign destination, Licensee shall
107 * ensure that the distribution and export/re-export of the software is in
108 * compliance with all laws, regulations, orders, or other restrictions of the
109 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
110 * any of its subsidiaries will export/re-export any technical data, process,
111 * software, or service, directly or indirectly, to any country for which the
112 * United States government or any agency thereof requires an export license,
113 * other governmental approval, or letter of assurance, without first obtaining
114 * such license, approval or letter.
115 *
116 *****************************************************************************/
117
118#define __EXSYSTEM_C__
119
120#include "acpi.h"
121#include "acinterp.h"
122#include "acevents.h"
123
124#define _COMPONENT ACPI_EXECUTER
125 ACPI_MODULE_NAME ("exsystem")
126
127
128/*******************************************************************************
129 *
130 * FUNCTION: AcpiExSystemWaitSemaphore
131 *
132 * PARAMETERS: Semaphore - OSD semaphore to wait on
133 * Timeout - Max time to wait
134 *
135 * RETURN: Status
136 *
137 * DESCRIPTION: Implements a semaphore wait with a check to see if the
138 * semaphore is available immediately. If it is not, the
139 * interpreter is released.
140 *
141 ******************************************************************************/
142
143ACPI_STATUS
144AcpiExSystemWaitSemaphore (
145 ACPI_HANDLE Semaphore,
146 UINT16 Timeout)
147{
148 ACPI_STATUS Status;
149 ACPI_STATUS Status2;
150
151
152 ACPI_FUNCTION_TRACE ("ExSystemWaitSemaphore");
153
154
155 Status = AcpiOsWaitSemaphore (Semaphore, 1, 0);
156 if (ACPI_SUCCESS (Status))
157 {
158 return_ACPI_STATUS (Status);
159 }
160
161 if (Status == AE_TIME)
162 {
163 /* We must wait, so unlock the interpreter */
164
165 AcpiExExitInterpreter ();
166
167 Status = AcpiOsWaitSemaphore (Semaphore, 1, Timeout);
168
169 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "*** Thread awake after blocking, %s\n",
170 AcpiFormatException (Status)));
171
172 /* Reacquire the interpreter */
173
174 Status2 = AcpiExEnterInterpreter ();
175 if (ACPI_FAILURE (Status2))
176 {
177 /* Report fatal error, could not acquire interpreter */
178
179 return_ACPI_STATUS (Status2);
180 }
181 }
182
183 return_ACPI_STATUS (Status);
184}
185
186
187/*******************************************************************************
188 *
189 * FUNCTION: AcpiExSystemDoStall
190 *
191 * PARAMETERS: HowLong - The amount of time to stall,
192 * in microseconds
193 *
194 * RETURN: Status
195 *
196 * DESCRIPTION: Suspend running thread for specified amount of time.
197 * Note: ACPI specification requires that Stall() does not
198 * relinquish the processor, and delays longer than 100 usec
199 * should use Sleep() instead. We allow stalls up to 255 usec
200 * for compatibility with other interpreters and existing BIOSs.
201 *
202 ******************************************************************************/
203
204ACPI_STATUS
205AcpiExSystemDoStall (
206 UINT32 HowLong)
207{
208 ACPI_STATUS Status = AE_OK;
209
210
211 ACPI_FUNCTION_ENTRY ();
212
213
214 if (HowLong > 255) /* 255 microseconds */
215 {
216 /*
217 * Longer than 255 usec, this is an error
218 *
219 * (ACPI specifies 100 usec as max, but this gives some slack in
220 * order to support existing BIOSs)
221 */
222 ACPI_REPORT_ERROR (("Stall: Time parameter is too large (%d)\n", HowLong));
223 Status = AE_AML_OPERAND_VALUE;
224 }
225 else
226 {
227 AcpiOsStall (HowLong);
228 }
229
230 return (Status);
231}
232
233
234/*******************************************************************************
235 *
236 * FUNCTION: AcpiExSystemDoSuspend
237 *
238 * PARAMETERS: HowLong - The amount of time to suspend,
239 * in milliseconds
240 *
241 * RETURN: None
242 *
243 * DESCRIPTION: Suspend running thread for specified amount of time.
244 *
245 ******************************************************************************/
246
247ACPI_STATUS
248AcpiExSystemDoSuspend (
249 UINT32 HowLong)
250{
251 ACPI_STATUS Status;
252
253
254 ACPI_FUNCTION_ENTRY ();
255
256
257 /* Since this thread will sleep, we must release the interpreter */
258
259 AcpiExExitInterpreter ();
260
261 AcpiOsSleep ((UINT16) (HowLong / (UINT32) 1000),
262 (UINT16) (HowLong % (UINT32) 1000));
263
264 /* And now we must get the interpreter again */
265
266 Status = AcpiExEnterInterpreter ();
267 return (Status);
268}
269
270
271/*******************************************************************************
272 *
273 * FUNCTION: AcpiExSystemAcquireMutex
274 *
275 * PARAMETERS: *TimeDesc - The 'time to delay' object descriptor
276 * *ObjDesc - The object descriptor for this op
277 *
278 * RETURN: Status
279 *
280 * DESCRIPTION: Provides an access point to perform synchronization operations
281 * within the AML. This function will cause a lock to be generated
282 * for the Mutex pointed to by ObjDesc.
283 *
284 ******************************************************************************/
285
286ACPI_STATUS
287AcpiExSystemAcquireMutex (
288 ACPI_OPERAND_OBJECT *TimeDesc,
289 ACPI_OPERAND_OBJECT *ObjDesc)
290{
291 ACPI_STATUS Status = AE_OK;
292
293
294 ACPI_FUNCTION_TRACE_PTR ("ExSystemAcquireMutex", ObjDesc);
295
296
297 if (!ObjDesc)
298 {
299 return_ACPI_STATUS (AE_BAD_PARAMETER);
300 }
301
302 /*
303 * Support for the _GL_ Mutex object -- go get the global lock
304 */
305 if (ObjDesc->Mutex.Semaphore == AcpiGbl_GlobalLockSemaphore)
306 {
307 Status = AcpiEvAcquireGlobalLock ((UINT16) TimeDesc->Integer.Value);
308 return_ACPI_STATUS (Status);
309 }
310
311 Status = AcpiExSystemWaitSemaphore (ObjDesc->Mutex.Semaphore,
312 (UINT16) TimeDesc->Integer.Value);
313 return_ACPI_STATUS (Status);
314}
315
316
317/*******************************************************************************
318 *
319 * FUNCTION: AcpiExSystemReleaseMutex
320 *
321 * PARAMETERS: *ObjDesc - The object descriptor for this op
322 *
323 * RETURN: Status
324 *
325 * DESCRIPTION: Provides an access point to perform synchronization operations
326 * within the AML. This operation is a request to release a
327 * previously acquired Mutex. If the Mutex variable is set then
328 * it will be decremented.
329 *
330 ******************************************************************************/
331
332ACPI_STATUS
333AcpiExSystemReleaseMutex (
334 ACPI_OPERAND_OBJECT *ObjDesc)
335{
336 ACPI_STATUS Status = AE_OK;
337
338
339 ACPI_FUNCTION_TRACE ("ExSystemReleaseMutex");
340
341
342 if (!ObjDesc)
343 {
344 return_ACPI_STATUS (AE_BAD_PARAMETER);
345 }
346
347 /*
348 * Support for the _GL_ Mutex object -- release the global lock
349 */
350 if (ObjDesc->Mutex.Semaphore == AcpiGbl_GlobalLockSemaphore)
351 {
352 Status = AcpiEvReleaseGlobalLock ();
353 return_ACPI_STATUS (Status);
354 }
355
356 Status = AcpiOsSignalSemaphore (ObjDesc->Mutex.Semaphore, 1);
357 return_ACPI_STATUS (Status);
358}
359
360
361/*******************************************************************************
362 *
363 * FUNCTION: AcpiExSystemSignalEvent
364 *
365 * PARAMETERS: *ObjDesc - The object descriptor for this op
366 *
367 * RETURN: AE_OK
368 *
369 * DESCRIPTION: Provides an access point to perform synchronization operations
370 * within the AML.
371 *
372 ******************************************************************************/
373
374ACPI_STATUS
375AcpiExSystemSignalEvent (
376 ACPI_OPERAND_OBJECT *ObjDesc)
377{
378 ACPI_STATUS Status = AE_OK;
379
380
381 ACPI_FUNCTION_TRACE ("ExSystemSignalEvent");
382
383
384 if (ObjDesc)
385 {
386 Status = AcpiOsSignalSemaphore (ObjDesc->Event.Semaphore, 1);
387 }
388
389 return_ACPI_STATUS (Status);
390}
391
392
393/*******************************************************************************
394 *
395 * FUNCTION: AcpiExSystemWaitEvent
396 *
397 * PARAMETERS: *TimeDesc - The 'time to delay' object descriptor
398 * *ObjDesc - The object descriptor for this op
399 *
400 * RETURN: Status
401 *
402 * DESCRIPTION: Provides an access point to perform synchronization operations
403 * within the AML. This operation is a request to wait for an
404 * event.
405 *
406 ******************************************************************************/
407
408ACPI_STATUS
409AcpiExSystemWaitEvent (
410 ACPI_OPERAND_OBJECT *TimeDesc,
411 ACPI_OPERAND_OBJECT *ObjDesc)
412{
413 ACPI_STATUS Status = AE_OK;
414
415
416 ACPI_FUNCTION_TRACE ("ExSystemWaitEvent");
417
418
419 if (ObjDesc)
420 {
421 Status = AcpiExSystemWaitSemaphore (ObjDesc->Event.Semaphore,
422 (UINT16) TimeDesc->Integer.Value);
423 }
424
425 return_ACPI_STATUS (Status);
426}
427
428
429/*******************************************************************************
430 *
431 * FUNCTION: AcpiExSystemResetEvent
432 *
433 * PARAMETERS: *ObjDesc - The object descriptor for this op
434 *
435 * RETURN: Status
436 *
437 * DESCRIPTION: Reset an event to a known state.
438 *
439 ******************************************************************************/
440
441ACPI_STATUS
442AcpiExSystemResetEvent (
443 ACPI_OPERAND_OBJECT *ObjDesc)
444{
445 ACPI_STATUS Status = AE_OK;
446 void *TempSemaphore;
447
448
449 ACPI_FUNCTION_ENTRY ();
450
451
452 /*
453 * We are going to simply delete the existing semaphore and
454 * create a new one!
455 */
456 Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT, 0, &TempSemaphore);
457 if (ACPI_SUCCESS (Status))
458 {
459 (void) AcpiOsDeleteSemaphore (ObjDesc->Event.Semaphore);
460 ObjDesc->Event.Semaphore = TempSemaphore;
461 }
462
463 return (Status);
464}
465
| 14 * All rights reserved.
15 *
16 * 2. License
17 *
18 * 2.1. This is your license from Intel Corp. under its intellectual property
19 * rights. You may have additional license terms from the party that provided
20 * you this software, covering your right to use that party's intellectual
21 * property rights.
22 *
23 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
24 * copy of the source code appearing in this file ("Covered Code") an
25 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
26 * base code distributed originally by Intel ("Original Intel Code") to copy,
27 * make derivatives, distribute, use and display any portion of the Covered
28 * Code in any form, with the right to sublicense such rights; and
29 *
30 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
31 * license (with the right to sublicense), under only those claims of Intel
32 * patents that are infringed by the Original Intel Code, to make, use, sell,
33 * offer to sell, and import the Covered Code and derivative works thereof
34 * solely to the minimum extent necessary to exercise the above copyright
35 * license, and in no event shall the patent license extend to any additions
36 * to or modifications of the Original Intel Code. No other license or right
37 * is granted directly or by implication, estoppel or otherwise;
38 *
39 * The above copyright and patent license is granted only if the following
40 * conditions are met:
41 *
42 * 3. Conditions
43 *
44 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
45 * Redistribution of source code of any substantial portion of the Covered
46 * Code or modification with rights to further distribute source must include
47 * the above Copyright Notice, the above License, this list of Conditions,
48 * and the following Disclaimer and Export Compliance provision. In addition,
49 * Licensee must cause all Covered Code to which Licensee contributes to
50 * contain a file documenting the changes Licensee made to create that Covered
51 * Code and the date of any change. Licensee must include in that file the
52 * documentation of any changes made by any predecessor Licensee. Licensee
53 * must include a prominent statement that the modification is derived,
54 * directly or indirectly, from Original Intel Code.
55 *
56 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
57 * Redistribution of source code of any substantial portion of the Covered
58 * Code or modification without rights to further distribute source must
59 * include the following Disclaimer and Export Compliance provision in the
60 * documentation and/or other materials provided with distribution. In
61 * addition, Licensee may not authorize further sublicense of source of any
62 * portion of the Covered Code, and must include terms to the effect that the
63 * license from Licensee to its licensee is limited to the intellectual
64 * property embodied in the software Licensee provides to its licensee, and
65 * not to intellectual property embodied in modifications its licensee may
66 * make.
67 *
68 * 3.3. Redistribution of Executable. Redistribution in executable form of any
69 * substantial portion of the Covered Code or modification must reproduce the
70 * above Copyright Notice, and the following Disclaimer and Export Compliance
71 * provision in the documentation and/or other materials provided with the
72 * distribution.
73 *
74 * 3.4. Intel retains all right, title, and interest in and to the Original
75 * Intel Code.
76 *
77 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
78 * Intel shall be used in advertising or otherwise to promote the sale, use or
79 * other dealings in products derived from or relating to the Covered Code
80 * without prior written authorization from Intel.
81 *
82 * 4. Disclaimer and Export Compliance
83 *
84 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
85 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
86 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
87 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
88 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
89 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
90 * PARTICULAR PURPOSE.
91 *
92 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
93 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
94 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
95 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
96 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
97 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
98 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
99 * LIMITED REMEDY.
100 *
101 * 4.3. Licensee shall not export, either directly or indirectly, any of this
102 * software or system incorporating such software without first obtaining any
103 * required license or other approval from the U. S. Department of Commerce or
104 * any other agency or department of the United States Government. In the
105 * event Licensee exports any such software from the United States or
106 * re-exports any such software from a foreign destination, Licensee shall
107 * ensure that the distribution and export/re-export of the software is in
108 * compliance with all laws, regulations, orders, or other restrictions of the
109 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
110 * any of its subsidiaries will export/re-export any technical data, process,
111 * software, or service, directly or indirectly, to any country for which the
112 * United States government or any agency thereof requires an export license,
113 * other governmental approval, or letter of assurance, without first obtaining
114 * such license, approval or letter.
115 *
116 *****************************************************************************/
117
118#define __EXSYSTEM_C__
119
120#include "acpi.h"
121#include "acinterp.h"
122#include "acevents.h"
123
124#define _COMPONENT ACPI_EXECUTER
125 ACPI_MODULE_NAME ("exsystem")
126
127
128/*******************************************************************************
129 *
130 * FUNCTION: AcpiExSystemWaitSemaphore
131 *
132 * PARAMETERS: Semaphore - OSD semaphore to wait on
133 * Timeout - Max time to wait
134 *
135 * RETURN: Status
136 *
137 * DESCRIPTION: Implements a semaphore wait with a check to see if the
138 * semaphore is available immediately. If it is not, the
139 * interpreter is released.
140 *
141 ******************************************************************************/
142
143ACPI_STATUS
144AcpiExSystemWaitSemaphore (
145 ACPI_HANDLE Semaphore,
146 UINT16 Timeout)
147{
148 ACPI_STATUS Status;
149 ACPI_STATUS Status2;
150
151
152 ACPI_FUNCTION_TRACE ("ExSystemWaitSemaphore");
153
154
155 Status = AcpiOsWaitSemaphore (Semaphore, 1, 0);
156 if (ACPI_SUCCESS (Status))
157 {
158 return_ACPI_STATUS (Status);
159 }
160
161 if (Status == AE_TIME)
162 {
163 /* We must wait, so unlock the interpreter */
164
165 AcpiExExitInterpreter ();
166
167 Status = AcpiOsWaitSemaphore (Semaphore, 1, Timeout);
168
169 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "*** Thread awake after blocking, %s\n",
170 AcpiFormatException (Status)));
171
172 /* Reacquire the interpreter */
173
174 Status2 = AcpiExEnterInterpreter ();
175 if (ACPI_FAILURE (Status2))
176 {
177 /* Report fatal error, could not acquire interpreter */
178
179 return_ACPI_STATUS (Status2);
180 }
181 }
182
183 return_ACPI_STATUS (Status);
184}
185
186
187/*******************************************************************************
188 *
189 * FUNCTION: AcpiExSystemDoStall
190 *
191 * PARAMETERS: HowLong - The amount of time to stall,
192 * in microseconds
193 *
194 * RETURN: Status
195 *
196 * DESCRIPTION: Suspend running thread for specified amount of time.
197 * Note: ACPI specification requires that Stall() does not
198 * relinquish the processor, and delays longer than 100 usec
199 * should use Sleep() instead. We allow stalls up to 255 usec
200 * for compatibility with other interpreters and existing BIOSs.
201 *
202 ******************************************************************************/
203
204ACPI_STATUS
205AcpiExSystemDoStall (
206 UINT32 HowLong)
207{
208 ACPI_STATUS Status = AE_OK;
209
210
211 ACPI_FUNCTION_ENTRY ();
212
213
214 if (HowLong > 255) /* 255 microseconds */
215 {
216 /*
217 * Longer than 255 usec, this is an error
218 *
219 * (ACPI specifies 100 usec as max, but this gives some slack in
220 * order to support existing BIOSs)
221 */
222 ACPI_REPORT_ERROR (("Stall: Time parameter is too large (%d)\n", HowLong));
223 Status = AE_AML_OPERAND_VALUE;
224 }
225 else
226 {
227 AcpiOsStall (HowLong);
228 }
229
230 return (Status);
231}
232
233
234/*******************************************************************************
235 *
236 * FUNCTION: AcpiExSystemDoSuspend
237 *
238 * PARAMETERS: HowLong - The amount of time to suspend,
239 * in milliseconds
240 *
241 * RETURN: None
242 *
243 * DESCRIPTION: Suspend running thread for specified amount of time.
244 *
245 ******************************************************************************/
246
247ACPI_STATUS
248AcpiExSystemDoSuspend (
249 UINT32 HowLong)
250{
251 ACPI_STATUS Status;
252
253
254 ACPI_FUNCTION_ENTRY ();
255
256
257 /* Since this thread will sleep, we must release the interpreter */
258
259 AcpiExExitInterpreter ();
260
261 AcpiOsSleep ((UINT16) (HowLong / (UINT32) 1000),
262 (UINT16) (HowLong % (UINT32) 1000));
263
264 /* And now we must get the interpreter again */
265
266 Status = AcpiExEnterInterpreter ();
267 return (Status);
268}
269
270
271/*******************************************************************************
272 *
273 * FUNCTION: AcpiExSystemAcquireMutex
274 *
275 * PARAMETERS: *TimeDesc - The 'time to delay' object descriptor
276 * *ObjDesc - The object descriptor for this op
277 *
278 * RETURN: Status
279 *
280 * DESCRIPTION: Provides an access point to perform synchronization operations
281 * within the AML. This function will cause a lock to be generated
282 * for the Mutex pointed to by ObjDesc.
283 *
284 ******************************************************************************/
285
286ACPI_STATUS
287AcpiExSystemAcquireMutex (
288 ACPI_OPERAND_OBJECT *TimeDesc,
289 ACPI_OPERAND_OBJECT *ObjDesc)
290{
291 ACPI_STATUS Status = AE_OK;
292
293
294 ACPI_FUNCTION_TRACE_PTR ("ExSystemAcquireMutex", ObjDesc);
295
296
297 if (!ObjDesc)
298 {
299 return_ACPI_STATUS (AE_BAD_PARAMETER);
300 }
301
302 /*
303 * Support for the _GL_ Mutex object -- go get the global lock
304 */
305 if (ObjDesc->Mutex.Semaphore == AcpiGbl_GlobalLockSemaphore)
306 {
307 Status = AcpiEvAcquireGlobalLock ((UINT16) TimeDesc->Integer.Value);
308 return_ACPI_STATUS (Status);
309 }
310
311 Status = AcpiExSystemWaitSemaphore (ObjDesc->Mutex.Semaphore,
312 (UINT16) TimeDesc->Integer.Value);
313 return_ACPI_STATUS (Status);
314}
315
316
317/*******************************************************************************
318 *
319 * FUNCTION: AcpiExSystemReleaseMutex
320 *
321 * PARAMETERS: *ObjDesc - The object descriptor for this op
322 *
323 * RETURN: Status
324 *
325 * DESCRIPTION: Provides an access point to perform synchronization operations
326 * within the AML. This operation is a request to release a
327 * previously acquired Mutex. If the Mutex variable is set then
328 * it will be decremented.
329 *
330 ******************************************************************************/
331
332ACPI_STATUS
333AcpiExSystemReleaseMutex (
334 ACPI_OPERAND_OBJECT *ObjDesc)
335{
336 ACPI_STATUS Status = AE_OK;
337
338
339 ACPI_FUNCTION_TRACE ("ExSystemReleaseMutex");
340
341
342 if (!ObjDesc)
343 {
344 return_ACPI_STATUS (AE_BAD_PARAMETER);
345 }
346
347 /*
348 * Support for the _GL_ Mutex object -- release the global lock
349 */
350 if (ObjDesc->Mutex.Semaphore == AcpiGbl_GlobalLockSemaphore)
351 {
352 Status = AcpiEvReleaseGlobalLock ();
353 return_ACPI_STATUS (Status);
354 }
355
356 Status = AcpiOsSignalSemaphore (ObjDesc->Mutex.Semaphore, 1);
357 return_ACPI_STATUS (Status);
358}
359
360
361/*******************************************************************************
362 *
363 * FUNCTION: AcpiExSystemSignalEvent
364 *
365 * PARAMETERS: *ObjDesc - The object descriptor for this op
366 *
367 * RETURN: AE_OK
368 *
369 * DESCRIPTION: Provides an access point to perform synchronization operations
370 * within the AML.
371 *
372 ******************************************************************************/
373
374ACPI_STATUS
375AcpiExSystemSignalEvent (
376 ACPI_OPERAND_OBJECT *ObjDesc)
377{
378 ACPI_STATUS Status = AE_OK;
379
380
381 ACPI_FUNCTION_TRACE ("ExSystemSignalEvent");
382
383
384 if (ObjDesc)
385 {
386 Status = AcpiOsSignalSemaphore (ObjDesc->Event.Semaphore, 1);
387 }
388
389 return_ACPI_STATUS (Status);
390}
391
392
393/*******************************************************************************
394 *
395 * FUNCTION: AcpiExSystemWaitEvent
396 *
397 * PARAMETERS: *TimeDesc - The 'time to delay' object descriptor
398 * *ObjDesc - The object descriptor for this op
399 *
400 * RETURN: Status
401 *
402 * DESCRIPTION: Provides an access point to perform synchronization operations
403 * within the AML. This operation is a request to wait for an
404 * event.
405 *
406 ******************************************************************************/
407
408ACPI_STATUS
409AcpiExSystemWaitEvent (
410 ACPI_OPERAND_OBJECT *TimeDesc,
411 ACPI_OPERAND_OBJECT *ObjDesc)
412{
413 ACPI_STATUS Status = AE_OK;
414
415
416 ACPI_FUNCTION_TRACE ("ExSystemWaitEvent");
417
418
419 if (ObjDesc)
420 {
421 Status = AcpiExSystemWaitSemaphore (ObjDesc->Event.Semaphore,
422 (UINT16) TimeDesc->Integer.Value);
423 }
424
425 return_ACPI_STATUS (Status);
426}
427
428
429/*******************************************************************************
430 *
431 * FUNCTION: AcpiExSystemResetEvent
432 *
433 * PARAMETERS: *ObjDesc - The object descriptor for this op
434 *
435 * RETURN: Status
436 *
437 * DESCRIPTION: Reset an event to a known state.
438 *
439 ******************************************************************************/
440
441ACPI_STATUS
442AcpiExSystemResetEvent (
443 ACPI_OPERAND_OBJECT *ObjDesc)
444{
445 ACPI_STATUS Status = AE_OK;
446 void *TempSemaphore;
447
448
449 ACPI_FUNCTION_ENTRY ();
450
451
452 /*
453 * We are going to simply delete the existing semaphore and
454 * create a new one!
455 */
456 Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT, 0, &TempSemaphore);
457 if (ACPI_SUCCESS (Status))
458 {
459 (void) AcpiOsDeleteSemaphore (ObjDesc->Event.Semaphore);
460 ObjDesc->Event.Semaphore = TempSemaphore;
461 }
462
463 return (Status);
464}
465
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