2 /******************************************************************************
4 * Module Name: exsystem - Interface to OS services
7 *****************************************************************************/
9 /******************************************************************************
13 * Some or all of this work - Copyright (c) 1999 - 2007, Intel Corp.
14 * All rights reserved.
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
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
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;
39 * The above copyright and patent license is granted only if the following
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.
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
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
74 * 3.4. Intel retains all right, title, and interest in and to the Original
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.
82 * 4. Disclaimer and Export Compliance
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
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
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.
116 *****************************************************************************/
118 #define __EXSYSTEM_C__
120 #include <contrib/dev/acpica/acpi.h>
121 #include <contrib/dev/acpica/acinterp.h>
122 #include <contrib/dev/acpica/acevents.h>
124 #define _COMPONENT ACPI_EXECUTER
125 ACPI_MODULE_NAME ("exsystem")
128 /*******************************************************************************
130 * FUNCTION: AcpiExSystemWaitSemaphore
132 * PARAMETERS: Semaphore - Semaphore to wait on
133 * Timeout - Max time to wait
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 before waiting.
141 ******************************************************************************/
144 AcpiExSystemWaitSemaphore (
145 ACPI_SEMAPHORE Semaphore,
151 ACPI_FUNCTION_TRACE (ExSystemWaitSemaphore);
154 Status = AcpiOsWaitSemaphore (Semaphore, 1, ACPI_DO_NOT_WAIT);
155 if (ACPI_SUCCESS (Status))
157 return_ACPI_STATUS (Status);
160 if (Status == AE_TIME)
162 /* We must wait, so unlock the interpreter */
164 AcpiExRelinquishInterpreter ();
166 Status = AcpiOsWaitSemaphore (Semaphore, 1, Timeout);
168 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
169 "*** Thread awake after blocking, %s\n",
170 AcpiFormatException (Status)));
172 /* Reacquire the interpreter */
174 AcpiExReacquireInterpreter ();
177 return_ACPI_STATUS (Status);
181 /*******************************************************************************
183 * FUNCTION: AcpiExSystemWaitMutex
185 * PARAMETERS: Mutex - Mutex to wait on
186 * Timeout - Max time to wait
190 * DESCRIPTION: Implements a mutex wait with a check to see if the
191 * mutex is available immediately. If it is not, the
192 * interpreter is released before waiting.
194 ******************************************************************************/
197 AcpiExSystemWaitMutex (
204 ACPI_FUNCTION_TRACE (ExSystemWaitMutex);
207 Status = AcpiOsAcquireMutex (Mutex, ACPI_DO_NOT_WAIT);
208 if (ACPI_SUCCESS (Status))
210 return_ACPI_STATUS (Status);
213 if (Status == AE_TIME)
215 /* We must wait, so unlock the interpreter */
217 AcpiExRelinquishInterpreter ();
219 Status = AcpiOsAcquireMutex (Mutex, Timeout);
221 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
222 "*** Thread awake after blocking, %s\n",
223 AcpiFormatException (Status)));
225 /* Reacquire the interpreter */
227 AcpiExReacquireInterpreter ();
230 return_ACPI_STATUS (Status);
234 /*******************************************************************************
236 * FUNCTION: AcpiExSystemDoStall
238 * PARAMETERS: HowLong - The amount of time to stall,
243 * DESCRIPTION: Suspend running thread for specified amount of time.
244 * Note: ACPI specification requires that Stall() does not
245 * relinquish the processor, and delays longer than 100 usec
246 * should use Sleep() instead. We allow stalls up to 255 usec
247 * for compatibility with other interpreters and existing BIOSs.
249 ******************************************************************************/
252 AcpiExSystemDoStall (
255 ACPI_STATUS Status = AE_OK;
258 ACPI_FUNCTION_ENTRY ();
261 if (HowLong > 255) /* 255 microseconds */
264 * Longer than 255 usec, this is an error
266 * (ACPI specifies 100 usec as max, but this gives some slack in
267 * order to support existing BIOSs)
269 ACPI_ERROR ((AE_INFO, "Time parameter is too large (%d)",
271 Status = AE_AML_OPERAND_VALUE;
275 AcpiOsStall (HowLong);
282 /*******************************************************************************
284 * FUNCTION: AcpiExSystemDoSuspend
286 * PARAMETERS: HowLong - The amount of time to suspend,
291 * DESCRIPTION: Suspend running thread for specified amount of time.
293 ******************************************************************************/
296 AcpiExSystemDoSuspend (
297 ACPI_INTEGER HowLong)
299 ACPI_FUNCTION_ENTRY ();
302 /* Since this thread will sleep, we must release the interpreter */
304 AcpiExRelinquishInterpreter ();
306 AcpiOsSleep (HowLong);
308 /* And now we must get the interpreter again */
310 AcpiExReacquireInterpreter ();
315 /*******************************************************************************
317 * FUNCTION: AcpiExSystemSignalEvent
319 * PARAMETERS: ObjDesc - The object descriptor for this op
323 * DESCRIPTION: Provides an access point to perform synchronization operations
326 ******************************************************************************/
329 AcpiExSystemSignalEvent (
330 ACPI_OPERAND_OBJECT *ObjDesc)
332 ACPI_STATUS Status = AE_OK;
335 ACPI_FUNCTION_TRACE (ExSystemSignalEvent);
340 Status = AcpiOsSignalSemaphore (ObjDesc->Event.OsSemaphore, 1);
343 return_ACPI_STATUS (Status);
347 /*******************************************************************************
349 * FUNCTION: AcpiExSystemWaitEvent
351 * PARAMETERS: TimeDesc - The 'time to delay' object descriptor
352 * ObjDesc - The object descriptor for this op
356 * DESCRIPTION: Provides an access point to perform synchronization operations
357 * within the AML. This operation is a request to wait for an
360 ******************************************************************************/
363 AcpiExSystemWaitEvent (
364 ACPI_OPERAND_OBJECT *TimeDesc,
365 ACPI_OPERAND_OBJECT *ObjDesc)
367 ACPI_STATUS Status = AE_OK;
370 ACPI_FUNCTION_TRACE (ExSystemWaitEvent);
375 Status = AcpiExSystemWaitSemaphore (ObjDesc->Event.OsSemaphore,
376 (UINT16) TimeDesc->Integer.Value);
379 return_ACPI_STATUS (Status);
383 /*******************************************************************************
385 * FUNCTION: AcpiExSystemResetEvent
387 * PARAMETERS: ObjDesc - The object descriptor for this op
391 * DESCRIPTION: Reset an event to a known state.
393 ******************************************************************************/
396 AcpiExSystemResetEvent (
397 ACPI_OPERAND_OBJECT *ObjDesc)
399 ACPI_STATUS Status = AE_OK;
400 ACPI_SEMAPHORE TempSemaphore;
403 ACPI_FUNCTION_ENTRY ();
407 * We are going to simply delete the existing semaphore and
410 Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT, 0, &TempSemaphore);
411 if (ACPI_SUCCESS (Status))
413 (void) AcpiOsDeleteSemaphore (ObjDesc->Event.OsSemaphore);
414 ObjDesc->Event.OsSemaphore = TempSemaphore;