osunixxf.c revision 316303 
1/******************************************************************************
2 *
3 * Module Name: osunixxf - UNIX OSL interfaces
4 *
5 *****************************************************************************/
6
7/******************************************************************************
8 *
9 * 1. Copyright Notice
10 *
11 * Some or all of this work - Copyright (c) 1999 - 2017, 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/*
153 * These interfaces are required in order to compile the ASL compiler and the
154 * various ACPICA tools under Linux or other Unix-like system.
155 */
156#include <contrib/dev/acpica/include/acpi.h>
157#include <contrib/dev/acpica/include/accommon.h>
158#include <contrib/dev/acpica/include/amlcode.h>
159#include <contrib/dev/acpica/include/acparser.h>
160#include <contrib/dev/acpica/include/acdebug.h>
161
162#include <stdio.h>
163#include <stdlib.h>
164#include <stdarg.h>
165#include <unistd.h>
166#include <sys/time.h>
167#include <semaphore.h>
168#include <pthread.h>
169#include <errno.h>
170
171#define _COMPONENT          ACPI_OS_SERVICES
172        ACPI_MODULE_NAME    ("osunixxf")
173
174
175/* Upcalls to AcpiExec */
176
177void
178AeTableOverride (
179    ACPI_TABLE_HEADER       *ExistingTable,
180    ACPI_TABLE_HEADER       **NewTable);
181
182typedef void* (*PTHREAD_CALLBACK) (void *);
183
184/* Buffer used by AcpiOsVprintf */
185
186#define ACPI_VPRINTF_BUFFER_SIZE    512
187#define _ASCII_NEWLINE              '\n'
188
189/* Terminal support for AcpiExec only */
190
191#ifdef ACPI_EXEC_APP
192#include <termios.h>
193
194struct termios              OriginalTermAttributes;
195int                         TermAttributesWereSet = 0;
196
197ACPI_STATUS
198AcpiUtReadLine (
199    char                    *Buffer,
200    UINT32                  BufferLength,
201    UINT32                  *BytesRead);
202
203static void
204OsEnterLineEditMode (
205    void);
206
207static void
208OsExitLineEditMode (
209    void);
210
211
212/******************************************************************************
213 *
214 * FUNCTION:    OsEnterLineEditMode, OsExitLineEditMode
215 *
216 * PARAMETERS:  None
217 *
218 * RETURN:      None
219 *
220 * DESCRIPTION: Enter/Exit the raw character input mode for the terminal.
221 *
222 * Interactive line-editing support for the AML debugger. Used with the
223 * common/acgetline module.
224 *
225 * readline() is not used because of non-portability. It is not available
226 * on all systems, and if it is, often the package must be manually installed.
227 *
228 * Therefore, we use the POSIX tcgetattr/tcsetattr and do the minimal line
229 * editing that we need in AcpiOsGetLine.
230 *
231 * If the POSIX tcgetattr/tcsetattr interfaces are unavailable, these
232 * calls will also work:
233 *     For OsEnterLineEditMode: system ("stty cbreak -echo")
234 *     For OsExitLineEditMode:  system ("stty cooked echo")
235 *
236 *****************************************************************************/
237
238static void
239OsEnterLineEditMode (
240    void)
241{
242    struct termios          LocalTermAttributes;
243
244
245    TermAttributesWereSet = 0;
246
247    /* STDIN must be a terminal */
248
249    if (!isatty (STDIN_FILENO))
250    {
251        return;
252    }
253
254    /* Get and keep the original attributes */
255
256    if (tcgetattr (STDIN_FILENO, &OriginalTermAttributes))
257    {
258        fprintf (stderr, "Could not get terminal attributes!\n");
259        return;
260    }
261
262    /* Set the new attributes to enable raw character input */
263
264    memcpy (&LocalTermAttributes, &OriginalTermAttributes,
265        sizeof (struct termios));
266
267    LocalTermAttributes.c_lflag &= ~(ICANON | ECHO);
268    LocalTermAttributes.c_cc[VMIN] = 1;
269    LocalTermAttributes.c_cc[VTIME] = 0;
270
271    if (tcsetattr (STDIN_FILENO, TCSANOW, &LocalTermAttributes))
272    {
273        fprintf (stderr, "Could not set terminal attributes!\n");
274        return;
275    }
276
277    TermAttributesWereSet = 1;
278}
279
280
281static void
282OsExitLineEditMode (
283    void)
284{
285
286    if (!TermAttributesWereSet)
287    {
288        return;
289    }
290
291    /* Set terminal attributes back to the original values */
292
293    if (tcsetattr (STDIN_FILENO, TCSANOW, &OriginalTermAttributes))
294    {
295        fprintf (stderr, "Could not restore terminal attributes!\n");
296    }
297}
298
299
300#else
301
302/* These functions are not needed for other ACPICA utilities */
303
304#define OsEnterLineEditMode()
305#define OsExitLineEditMode()
306#endif
307
308
309/******************************************************************************
310 *
311 * FUNCTION:    AcpiOsInitialize, AcpiOsTerminate
312 *
313 * PARAMETERS:  None
314 *
315 * RETURN:      Status
316 *
317 * DESCRIPTION: Initialize and terminate this module.
318 *
319 *****************************************************************************/
320
321ACPI_STATUS
322AcpiOsInitialize (
323    void)
324{
325    ACPI_STATUS            Status;
326
327
328    AcpiGbl_OutputFile = stdout;
329
330    OsEnterLineEditMode ();
331
332    Status = AcpiOsCreateLock (&AcpiGbl_PrintLock);
333    if (ACPI_FAILURE (Status))
334    {
335        return (Status);
336    }
337
338    return (AE_OK);
339}
340
341ACPI_STATUS
342AcpiOsTerminate (
343    void)
344{
345
346    OsExitLineEditMode ();
347    return (AE_OK);
348}
349
350
351#ifndef ACPI_USE_NATIVE_RSDP_POINTER
352/******************************************************************************
353 *
354 * FUNCTION:    AcpiOsGetRootPointer
355 *
356 * PARAMETERS:  None
357 *
358 * RETURN:      RSDP physical address
359 *
360 * DESCRIPTION: Gets the ACPI root pointer (RSDP)
361 *
362 *****************************************************************************/
363
364ACPI_PHYSICAL_ADDRESS
365AcpiOsGetRootPointer (
366    void)
367{
368
369    return (0);
370}
371#endif
372
373
374/******************************************************************************
375 *
376 * FUNCTION:    AcpiOsPredefinedOverride
377 *
378 * PARAMETERS:  InitVal             - Initial value of the predefined object
379 *              NewVal              - The new value for the object
380 *
381 * RETURN:      Status, pointer to value. Null pointer returned if not
382 *              overriding.
383 *
384 * DESCRIPTION: Allow the OS to override predefined names
385 *
386 *****************************************************************************/
387
388ACPI_STATUS
389AcpiOsPredefinedOverride (
390    const ACPI_PREDEFINED_NAMES *InitVal,
391    ACPI_STRING                 *NewVal)
392{
393
394    if (!InitVal || !NewVal)
395    {
396        return (AE_BAD_PARAMETER);
397    }
398
399    *NewVal = NULL;
400    return (AE_OK);
401}
402
403
404/******************************************************************************
405 *
406 * FUNCTION:    AcpiOsTableOverride
407 *
408 * PARAMETERS:  ExistingTable       - Header of current table (probably
409 *                                    firmware)
410 *              NewTable            - Where an entire new table is returned.
411 *
412 * RETURN:      Status, pointer to new table. Null pointer returned if no
413 *              table is available to override
414 *
415 * DESCRIPTION: Return a different version of a table if one is available
416 *
417 *****************************************************************************/
418
419ACPI_STATUS
420AcpiOsTableOverride (
421    ACPI_TABLE_HEADER       *ExistingTable,
422    ACPI_TABLE_HEADER       **NewTable)
423{
424
425    if (!ExistingTable || !NewTable)
426    {
427        return (AE_BAD_PARAMETER);
428    }
429
430    *NewTable = NULL;
431
432#ifdef ACPI_EXEC_APP
433
434    AeTableOverride (ExistingTable, NewTable);
435    return (AE_OK);
436#else
437
438    return (AE_NO_ACPI_TABLES);
439#endif
440}
441
442
443/******************************************************************************
444 *
445 * FUNCTION:    AcpiOsPhysicalTableOverride
446 *
447 * PARAMETERS:  ExistingTable       - Header of current table (probably firmware)
448 *              NewAddress          - Where new table address is returned
449 *                                    (Physical address)
450 *              NewTableLength      - Where new table length is returned
451 *
452 * RETURN:      Status, address/length of new table. Null pointer returned
453 *              if no table is available to override.
454 *
455 * DESCRIPTION: Returns AE_SUPPORT, function not used in user space.
456 *
457 *****************************************************************************/
458
459ACPI_STATUS
460AcpiOsPhysicalTableOverride (
461    ACPI_TABLE_HEADER       *ExistingTable,
462    ACPI_PHYSICAL_ADDRESS   *NewAddress,
463    UINT32                  *NewTableLength)
464{
465
466    return (AE_SUPPORT);
467}
468
469
470/******************************************************************************
471 *
472 * FUNCTION:    AcpiOsEnterSleep
473 *
474 * PARAMETERS:  SleepState          - Which sleep state to enter
475 *              RegaValue           - Register A value
476 *              RegbValue           - Register B value
477 *
478 * RETURN:      Status
479 *
480 * DESCRIPTION: A hook before writing sleep registers to enter the sleep
481 *              state. Return AE_CTRL_TERMINATE to skip further sleep register
482 *              writes.
483 *
484 *****************************************************************************/
485
486ACPI_STATUS
487AcpiOsEnterSleep (
488    UINT8                   SleepState,
489    UINT32                  RegaValue,
490    UINT32                  RegbValue)
491{
492
493    return (AE_OK);
494}
495
496
497/******************************************************************************
498 *
499 * FUNCTION:    AcpiOsRedirectOutput
500 *
501 * PARAMETERS:  Destination         - An open file handle/pointer
502 *
503 * RETURN:      None
504 *
505 * DESCRIPTION: Causes redirect of AcpiOsPrintf and AcpiOsVprintf
506 *
507 *****************************************************************************/
508
509void
510AcpiOsRedirectOutput (
511    void                    *Destination)
512{
513
514    AcpiGbl_OutputFile = Destination;
515}
516
517
518/******************************************************************************
519 *
520 * FUNCTION:    AcpiOsPrintf
521 *
522 * PARAMETERS:  fmt, ...            - Standard printf format
523 *
524 * RETURN:      None
525 *
526 * DESCRIPTION: Formatted output. Note: very similar to AcpiOsVprintf
527 *              (performance), changes should be tracked in both functions.
528 *
529 *****************************************************************************/
530
531void ACPI_INTERNAL_VAR_XFACE
532AcpiOsPrintf (
533    const char              *Fmt,
534    ...)
535{
536    va_list                 Args;
537    UINT8                   Flags;
538
539
540    Flags = AcpiGbl_DbOutputFlags;
541    if (Flags & ACPI_DB_REDIRECTABLE_OUTPUT)
542    {
543        /* Output is directable to either a file (if open) or the console */
544
545        if (AcpiGbl_DebugFile)
546        {
547            /* Output file is open, send the output there */
548
549            va_start (Args, Fmt);
550            vfprintf (AcpiGbl_DebugFile, Fmt, Args);
551            va_end (Args);
552        }
553        else
554        {
555            /* No redirection, send output to console (once only!) */
556
557            Flags |= ACPI_DB_CONSOLE_OUTPUT;
558        }
559    }
560
561    if (Flags & ACPI_DB_CONSOLE_OUTPUT)
562    {
563        va_start (Args, Fmt);
564        vfprintf (AcpiGbl_OutputFile, Fmt, Args);
565        va_end (Args);
566    }
567}
568
569
570/******************************************************************************
571 *
572 * FUNCTION:    AcpiOsVprintf
573 *
574 * PARAMETERS:  fmt                 - Standard printf format
575 *              args                - Argument list
576 *
577 * RETURN:      None
578 *
579 * DESCRIPTION: Formatted output with argument list pointer. Note: very
580 *              similar to AcpiOsPrintf, changes should be tracked in both
581 *              functions.
582 *
583 *****************************************************************************/
584
585void
586AcpiOsVprintf (
587    const char              *Fmt,
588    va_list                 Args)
589{
590    UINT8                   Flags;
591    char                    Buffer[ACPI_VPRINTF_BUFFER_SIZE];
592
593
594    /*
595     * We build the output string in a local buffer because we may be
596     * outputting the buffer twice. Using vfprintf is problematic because
597     * some implementations modify the args pointer/structure during
598     * execution. Thus, we use the local buffer for portability.
599     *
600     * Note: Since this module is intended for use by the various ACPICA
601     * utilities/applications, we can safely declare the buffer on the stack.
602     * Also, This function is used for relatively small error messages only.
603     */
604    vsnprintf (Buffer, ACPI_VPRINTF_BUFFER_SIZE, Fmt, Args);
605
606    Flags = AcpiGbl_DbOutputFlags;
607    if (Flags & ACPI_DB_REDIRECTABLE_OUTPUT)
608    {
609        /* Output is directable to either a file (if open) or the console */
610
611        if (AcpiGbl_DebugFile)
612        {
613            /* Output file is open, send the output there */
614
615            fputs (Buffer, AcpiGbl_DebugFile);
616        }
617        else
618        {
619            /* No redirection, send output to console (once only!) */
620
621            Flags |= ACPI_DB_CONSOLE_OUTPUT;
622        }
623    }
624
625    if (Flags & ACPI_DB_CONSOLE_OUTPUT)
626    {
627        fputs (Buffer, AcpiGbl_OutputFile);
628    }
629}
630
631
632#ifndef ACPI_EXEC_APP
633/******************************************************************************
634 *
635 * FUNCTION:    AcpiOsGetLine
636 *
637 * PARAMETERS:  Buffer              - Where to return the command line
638 *              BufferLength        - Maximum length of Buffer
639 *              BytesRead           - Where the actual byte count is returned
640 *
641 * RETURN:      Status and actual bytes read
642 *
643 * DESCRIPTION: Get the next input line from the terminal. NOTE: For the
644 *              AcpiExec utility, we use the acgetline module instead to
645 *              provide line-editing and history support.
646 *
647 *****************************************************************************/
648
649ACPI_STATUS
650AcpiOsGetLine (
651    char                    *Buffer,
652    UINT32                  BufferLength,
653    UINT32                  *BytesRead)
654{
655    int                     InputChar;
656    UINT32                  EndOfLine;
657
658
659    /* Standard AcpiOsGetLine for all utilities except AcpiExec */
660
661    for (EndOfLine = 0; ; EndOfLine++)
662    {
663        if (EndOfLine >= BufferLength)
664        {
665            return (AE_BUFFER_OVERFLOW);
666        }
667
668        if ((InputChar = getchar ()) == EOF)
669        {
670            return (AE_ERROR);
671        }
672
673        if (!InputChar || InputChar == _ASCII_NEWLINE)
674        {
675            break;
676        }
677
678        Buffer[EndOfLine] = (char) InputChar;
679    }
680
681    /* Null terminate the buffer */
682
683    Buffer[EndOfLine] = 0;
684
685    /* Return the number of bytes in the string */
686
687    if (BytesRead)
688    {
689        *BytesRead = EndOfLine;
690    }
691
692    return (AE_OK);
693}
694#endif
695
696
697#ifndef ACPI_USE_NATIVE_MEMORY_MAPPING
698/******************************************************************************
699 *
700 * FUNCTION:    AcpiOsMapMemory
701 *
702 * PARAMETERS:  where               - Physical address of memory to be mapped
703 *              length              - How much memory to map
704 *
705 * RETURN:      Pointer to mapped memory. Null on error.
706 *
707 * DESCRIPTION: Map physical memory into caller's address space
708 *
709 *****************************************************************************/
710
711void *
712AcpiOsMapMemory (
713    ACPI_PHYSICAL_ADDRESS   where,
714    ACPI_SIZE               length)
715{
716
717    return (ACPI_TO_POINTER ((ACPI_SIZE) where));
718}
719
720
721/******************************************************************************
722 *
723 * FUNCTION:    AcpiOsUnmapMemory
724 *
725 * PARAMETERS:  where               - Logical address of memory to be unmapped
726 *              length              - How much memory to unmap
727 *
728 * RETURN:      None.
729 *
730 * DESCRIPTION: Delete a previously created mapping. Where and Length must
731 *              correspond to a previous mapping exactly.
732 *
733 *****************************************************************************/
734
735void
736AcpiOsUnmapMemory (
737    void                    *where,
738    ACPI_SIZE               length)
739{
740
741    return;
742}
743#endif
744
745
746/******************************************************************************
747 *
748 * FUNCTION:    AcpiOsAllocate
749 *
750 * PARAMETERS:  Size                - Amount to allocate, in bytes
751 *
752 * RETURN:      Pointer to the new allocation. Null on error.
753 *
754 * DESCRIPTION: Allocate memory. Algorithm is dependent on the OS.
755 *
756 *****************************************************************************/
757
758void *
759AcpiOsAllocate (
760    ACPI_SIZE               size)
761{
762    void                    *Mem;
763
764
765    Mem = (void *) malloc ((size_t) size);
766    return (Mem);
767}
768
769
770#ifdef USE_NATIVE_ALLOCATE_ZEROED
771/******************************************************************************
772 *
773 * FUNCTION:    AcpiOsAllocateZeroed
774 *
775 * PARAMETERS:  Size                - Amount to allocate, in bytes
776 *
777 * RETURN:      Pointer to the new allocation. Null on error.
778 *
779 * DESCRIPTION: Allocate and zero memory. Algorithm is dependent on the OS.
780 *
781 *****************************************************************************/
782
783void *
784AcpiOsAllocateZeroed (
785    ACPI_SIZE               size)
786{
787    void                    *Mem;
788
789
790    Mem = (void *) calloc (1, (size_t) size);
791    return (Mem);
792}
793#endif
794
795
796/******************************************************************************
797 *
798 * FUNCTION:    AcpiOsFree
799 *
800 * PARAMETERS:  mem                 - Pointer to previously allocated memory
801 *
802 * RETURN:      None.
803 *
804 * DESCRIPTION: Free memory allocated via AcpiOsAllocate
805 *
806 *****************************************************************************/
807
808void
809AcpiOsFree (
810    void                    *mem)
811{
812
813    free (mem);
814}
815
816
817#ifdef ACPI_SINGLE_THREADED
818/******************************************************************************
819 *
820 * FUNCTION:    Semaphore stub functions
821 *
822 * DESCRIPTION: Stub functions used for single-thread applications that do
823 *              not require semaphore synchronization. Full implementations
824 *              of these functions appear after the stubs.
825 *
826 *****************************************************************************/
827
828ACPI_STATUS
829AcpiOsCreateSemaphore (
830    UINT32              MaxUnits,
831    UINT32              InitialUnits,
832    ACPI_HANDLE         *OutHandle)
833{
834    *OutHandle = (ACPI_HANDLE) 1;
835    return (AE_OK);
836}
837
838ACPI_STATUS
839AcpiOsDeleteSemaphore (
840    ACPI_HANDLE         Handle)
841{
842    return (AE_OK);
843}
844
845ACPI_STATUS
846AcpiOsWaitSemaphore (
847    ACPI_HANDLE         Handle,
848    UINT32              Units,
849    UINT16              Timeout)
850{
851    return (AE_OK);
852}
853
854ACPI_STATUS
855AcpiOsSignalSemaphore (
856    ACPI_HANDLE         Handle,
857    UINT32              Units)
858{
859    return (AE_OK);
860}
861
862#else
863/******************************************************************************
864 *
865 * FUNCTION:    AcpiOsCreateSemaphore
866 *
867 * PARAMETERS:  InitialUnits        - Units to be assigned to the new semaphore
868 *              OutHandle           - Where a handle will be returned
869 *
870 * RETURN:      Status
871 *
872 * DESCRIPTION: Create an OS semaphore
873 *
874 *****************************************************************************/
875
876ACPI_STATUS
877AcpiOsCreateSemaphore (
878    UINT32              MaxUnits,
879    UINT32              InitialUnits,
880    ACPI_HANDLE         *OutHandle)
881{
882    sem_t               *Sem;
883
884
885    if (!OutHandle)
886    {
887        return (AE_BAD_PARAMETER);
888    }
889
890#ifdef __APPLE__
891    {
892        static int      SemaphoreCount = 0;
893        char            SemaphoreName[32];
894
895        snprintf (SemaphoreName, sizeof (SemaphoreName), "acpi_sem_%d",
896            SemaphoreCount++);
897        printf ("%s\n", SemaphoreName);
898        Sem = sem_open (SemaphoreName, O_EXCL|O_CREAT, 0755, InitialUnits);
899        if (!Sem)
900        {
901            return (AE_NO_MEMORY);
902        }
903        sem_unlink (SemaphoreName); /* This just deletes the name */
904    }
905
906#else
907    Sem = AcpiOsAllocate (sizeof (sem_t));
908    if (!Sem)
909    {
910        return (AE_NO_MEMORY);
911    }
912
913    if (sem_init (Sem, 0, InitialUnits) == -1)
914    {
915        AcpiOsFree (Sem);
916        return (AE_BAD_PARAMETER);
917    }
918#endif
919
920    *OutHandle = (ACPI_HANDLE) Sem;
921    return (AE_OK);
922}
923
924
925/******************************************************************************
926 *
927 * FUNCTION:    AcpiOsDeleteSemaphore
928 *
929 * PARAMETERS:  Handle              - Handle returned by AcpiOsCreateSemaphore
930 *
931 * RETURN:      Status
932 *
933 * DESCRIPTION: Delete an OS semaphore
934 *
935 *****************************************************************************/
936
937ACPI_STATUS
938AcpiOsDeleteSemaphore (
939    ACPI_HANDLE         Handle)
940{
941    sem_t               *Sem = (sem_t *) Handle;
942
943
944    if (!Sem)
945    {
946        return (AE_BAD_PARAMETER);
947    }
948
949#ifdef __APPLE__
950    if (sem_close (Sem) == -1)
951    {
952        return (AE_BAD_PARAMETER);
953    }
954#else
955    if (sem_destroy (Sem) == -1)
956    {
957        return (AE_BAD_PARAMETER);
958    }
959#endif
960
961    return (AE_OK);
962}
963
964
965/******************************************************************************
966 *
967 * FUNCTION:    AcpiOsWaitSemaphore
968 *
969 * PARAMETERS:  Handle              - Handle returned by AcpiOsCreateSemaphore
970 *              Units               - How many units to wait for
971 *              MsecTimeout         - How long to wait (milliseconds)
972 *
973 * RETURN:      Status
974 *
975 * DESCRIPTION: Wait for units
976 *
977 *****************************************************************************/
978
979ACPI_STATUS
980AcpiOsWaitSemaphore (
981    ACPI_HANDLE         Handle,
982    UINT32              Units,
983    UINT16              MsecTimeout)
984{
985    ACPI_STATUS         Status = AE_OK;
986    sem_t               *Sem = (sem_t *) Handle;
987#ifndef ACPI_USE_ALTERNATE_TIMEOUT
988    struct timespec     Time;
989    int                 RetVal;
990#endif
991
992
993    if (!Sem)
994    {
995        return (AE_BAD_PARAMETER);
996    }
997
998    switch (MsecTimeout)
999    {
1000    /*
1001     * No Wait:
1002     * --------
1003     * A zero timeout value indicates that we shouldn't wait - just
1004     * acquire the semaphore if available otherwise return AE_TIME
1005     * (a.k.a. 'would block').
1006     */
1007    case 0:
1008
1009        if (sem_trywait(Sem) == -1)
1010        {
1011            Status = (AE_TIME);
1012        }
1013        break;
1014
1015    /* Wait Indefinitely */
1016
1017    case ACPI_WAIT_FOREVER:
1018
1019        if (sem_wait (Sem))
1020        {
1021            Status = (AE_TIME);
1022        }
1023        break;
1024
1025    /* Wait with MsecTimeout */
1026
1027    default:
1028
1029#ifdef ACPI_USE_ALTERNATE_TIMEOUT
1030        /*
1031         * Alternate timeout mechanism for environments where
1032         * sem_timedwait is not available or does not work properly.
1033         */
1034        while (MsecTimeout)
1035        {
1036            if (sem_trywait (Sem) == 0)
1037            {
1038                /* Got the semaphore */
1039                return (AE_OK);
1040            }
1041
1042            if (MsecTimeout >= 10)
1043            {
1044                MsecTimeout -= 10;
1045                usleep (10 * ACPI_USEC_PER_MSEC); /* ten milliseconds */
1046            }
1047            else
1048            {
1049                MsecTimeout--;
1050                usleep (ACPI_USEC_PER_MSEC); /* one millisecond */
1051            }
1052        }
1053        Status = (AE_TIME);
1054#else
1055        /*
1056         * The interface to sem_timedwait is an absolute time, so we need to
1057         * get the current time, then add in the millisecond Timeout value.
1058         */
1059        if (clock_gettime (CLOCK_REALTIME, &Time) == -1)
1060        {
1061            perror ("clock_gettime");
1062            return (AE_TIME);
1063        }
1064
1065        Time.tv_sec += (MsecTimeout / ACPI_MSEC_PER_SEC);
1066        Time.tv_nsec += ((MsecTimeout % ACPI_MSEC_PER_SEC) * ACPI_NSEC_PER_MSEC);
1067
1068        /* Handle nanosecond overflow (field must be less than one second) */
1069
1070        if (Time.tv_nsec >= ACPI_NSEC_PER_SEC)
1071        {
1072            Time.tv_sec += (Time.tv_nsec / ACPI_NSEC_PER_SEC);
1073            Time.tv_nsec = (Time.tv_nsec % ACPI_NSEC_PER_SEC);
1074        }
1075
1076        while (((RetVal = sem_timedwait (Sem, &Time)) == -1) && (errno == EINTR))
1077        {
1078            continue;
1079        }
1080
1081        if (RetVal != 0)
1082        {
1083            if (errno != ETIMEDOUT)
1084            {
1085                perror ("sem_timedwait");
1086            }
1087            Status = (AE_TIME);
1088        }
1089#endif
1090        break;
1091    }
1092
1093    return (Status);
1094}
1095
1096
1097/******************************************************************************
1098 *
1099 * FUNCTION:    AcpiOsSignalSemaphore
1100 *
1101 * PARAMETERS:  Handle              - Handle returned by AcpiOsCreateSemaphore
1102 *              Units               - Number of units to send
1103 *
1104 * RETURN:      Status
1105 *
1106 * DESCRIPTION: Send units
1107 *
1108 *****************************************************************************/
1109
1110ACPI_STATUS
1111AcpiOsSignalSemaphore (
1112    ACPI_HANDLE         Handle,
1113    UINT32              Units)
1114{
1115    sem_t               *Sem = (sem_t *)Handle;
1116
1117
1118    if (!Sem)
1119    {
1120        return (AE_BAD_PARAMETER);
1121    }
1122
1123    if (sem_post (Sem) == -1)
1124    {
1125        return (AE_LIMIT);
1126    }
1127
1128    return (AE_OK);
1129}
1130
1131#endif /* ACPI_SINGLE_THREADED */
1132
1133
1134/******************************************************************************
1135 *
1136 * FUNCTION:    Spinlock interfaces
1137 *
1138 * DESCRIPTION: Map these interfaces to semaphore interfaces
1139 *
1140 *****************************************************************************/
1141
1142ACPI_STATUS
1143AcpiOsCreateLock (
1144    ACPI_SPINLOCK           *OutHandle)
1145{
1146
1147    return (AcpiOsCreateSemaphore (1, 1, OutHandle));
1148}
1149
1150
1151void
1152AcpiOsDeleteLock (
1153    ACPI_SPINLOCK           Handle)
1154{
1155    AcpiOsDeleteSemaphore (Handle);
1156}
1157
1158
1159ACPI_CPU_FLAGS
1160AcpiOsAcquireLock (
1161    ACPI_HANDLE             Handle)
1162{
1163    AcpiOsWaitSemaphore (Handle, 1, 0xFFFF);
1164    return (0);
1165}
1166
1167
1168void
1169AcpiOsReleaseLock (
1170    ACPI_SPINLOCK           Handle,
1171    ACPI_CPU_FLAGS          Flags)
1172{
1173    AcpiOsSignalSemaphore (Handle, 1);
1174}
1175
1176
1177/******************************************************************************
1178 *
1179 * FUNCTION:    AcpiOsInstallInterruptHandler
1180 *
1181 * PARAMETERS:  InterruptNumber     - Level handler should respond to.
1182 *              Isr                 - Address of the ACPI interrupt handler
1183 *              ExceptPtr           - Where status is returned
1184 *
1185 * RETURN:      Handle to the newly installed handler.
1186 *
1187 * DESCRIPTION: Install an interrupt handler. Used to install the ACPI
1188 *              OS-independent handler.
1189 *
1190 *****************************************************************************/
1191
1192UINT32
1193AcpiOsInstallInterruptHandler (
1194    UINT32                  InterruptNumber,
1195    ACPI_OSD_HANDLER        ServiceRoutine,
1196    void                    *Context)
1197{
1198
1199    return (AE_OK);
1200}
1201
1202
1203/******************************************************************************
1204 *
1205 * FUNCTION:    AcpiOsRemoveInterruptHandler
1206 *
1207 * PARAMETERS:  Handle              - Returned when handler was installed
1208 *
1209 * RETURN:      Status
1210 *
1211 * DESCRIPTION: Uninstalls an interrupt handler.
1212 *
1213 *****************************************************************************/
1214
1215ACPI_STATUS
1216AcpiOsRemoveInterruptHandler (
1217    UINT32                  InterruptNumber,
1218    ACPI_OSD_HANDLER        ServiceRoutine)
1219{
1220
1221    return (AE_OK);
1222}
1223
1224
1225/******************************************************************************
1226 *
1227 * FUNCTION:    AcpiOsStall
1228 *
1229 * PARAMETERS:  microseconds        - Time to sleep
1230 *
1231 * RETURN:      Blocks until sleep is completed.
1232 *
1233 * DESCRIPTION: Sleep at microsecond granularity
1234 *
1235 *****************************************************************************/
1236
1237void
1238AcpiOsStall (
1239    UINT32                  microseconds)
1240{
1241
1242    if (microseconds)
1243    {
1244        usleep (microseconds);
1245    }
1246}
1247
1248
1249/******************************************************************************
1250 *
1251 * FUNCTION:    AcpiOsSleep
1252 *
1253 * PARAMETERS:  milliseconds        - Time to sleep
1254 *
1255 * RETURN:      Blocks until sleep is completed.
1256 *
1257 * DESCRIPTION: Sleep at millisecond granularity
1258 *
1259 *****************************************************************************/
1260
1261void
1262AcpiOsSleep (
1263    UINT64                  milliseconds)
1264{
1265
1266    /* Sleep for whole seconds */
1267
1268    sleep (milliseconds / ACPI_MSEC_PER_SEC);
1269
1270    /*
1271     * Sleep for remaining microseconds.
1272     * Arg to usleep() is in usecs and must be less than 1,000,000 (1 second).
1273     */
1274    usleep ((milliseconds % ACPI_MSEC_PER_SEC) * ACPI_USEC_PER_MSEC);
1275}
1276
1277
1278/******************************************************************************
1279 *
1280 * FUNCTION:    AcpiOsGetTimer
1281 *
1282 * PARAMETERS:  None
1283 *
1284 * RETURN:      Current time in 100 nanosecond units
1285 *
1286 * DESCRIPTION: Get the current system time
1287 *
1288 *****************************************************************************/
1289
1290UINT64
1291AcpiOsGetTimer (
1292    void)
1293{
1294    struct timeval          time;
1295
1296
1297    /* This timer has sufficient resolution for user-space application code */
1298
1299    gettimeofday (&time, NULL);
1300
1301    /* (Seconds * 10^7 = 100ns(10^-7)) + (Microseconds(10^-6) * 10^1 = 100ns) */
1302
1303    return (((UINT64) time.tv_sec * ACPI_100NSEC_PER_SEC) +
1304            ((UINT64) time.tv_usec * ACPI_100NSEC_PER_USEC));
1305}
1306
1307
1308/******************************************************************************
1309 *
1310 * FUNCTION:    AcpiOsReadPciConfiguration
1311 *
1312 * PARAMETERS:  PciId               - Seg/Bus/Dev
1313 *              PciRegister         - Device Register
1314 *              Value               - Buffer where value is placed
1315 *              Width               - Number of bits
1316 *
1317 * RETURN:      Status
1318 *
1319 * DESCRIPTION: Read data from PCI configuration space
1320 *
1321 *****************************************************************************/
1322
1323ACPI_STATUS
1324AcpiOsReadPciConfiguration (
1325    ACPI_PCI_ID             *PciId,
1326    UINT32                  PciRegister,
1327    UINT64                  *Value,
1328    UINT32                  Width)
1329{
1330
1331    *Value = 0;
1332    return (AE_OK);
1333}
1334
1335
1336/******************************************************************************
1337 *
1338 * FUNCTION:    AcpiOsWritePciConfiguration
1339 *
1340 * PARAMETERS:  PciId               - Seg/Bus/Dev
1341 *              PciRegister         - Device Register
1342 *              Value               - Value to be written
1343 *              Width               - Number of bits
1344 *
1345 * RETURN:      Status.
1346 *
1347 * DESCRIPTION: Write data to PCI configuration space
1348 *
1349 *****************************************************************************/
1350
1351ACPI_STATUS
1352AcpiOsWritePciConfiguration (
1353    ACPI_PCI_ID             *PciId,
1354    UINT32                  PciRegister,
1355    UINT64                  Value,
1356    UINT32                  Width)
1357{
1358
1359    return (AE_OK);
1360}
1361
1362
1363/******************************************************************************
1364 *
1365 * FUNCTION:    AcpiOsReadPort
1366 *
1367 * PARAMETERS:  Address             - Address of I/O port/register to read
1368 *              Value               - Where value is placed
1369 *              Width               - Number of bits
1370 *
1371 * RETURN:      Value read from port
1372 *
1373 * DESCRIPTION: Read data from an I/O port or register
1374 *
1375 *****************************************************************************/
1376
1377ACPI_STATUS
1378AcpiOsReadPort (
1379    ACPI_IO_ADDRESS         Address,
1380    UINT32                  *Value,
1381    UINT32                  Width)
1382{
1383
1384    switch (Width)
1385    {
1386    case 8:
1387
1388        *Value = 0xFF;
1389        break;
1390
1391    case 16:
1392
1393        *Value = 0xFFFF;
1394        break;
1395
1396    case 32:
1397
1398        *Value = 0xFFFFFFFF;
1399        break;
1400
1401    default:
1402
1403        return (AE_BAD_PARAMETER);
1404    }
1405
1406    return (AE_OK);
1407}
1408
1409
1410/******************************************************************************
1411 *
1412 * FUNCTION:    AcpiOsWritePort
1413 *
1414 * PARAMETERS:  Address             - Address of I/O port/register to write
1415 *              Value               - Value to write
1416 *              Width               - Number of bits
1417 *
1418 * RETURN:      None
1419 *
1420 * DESCRIPTION: Write data to an I/O port or register
1421 *
1422 *****************************************************************************/
1423
1424ACPI_STATUS
1425AcpiOsWritePort (
1426    ACPI_IO_ADDRESS         Address,
1427    UINT32                  Value,
1428    UINT32                  Width)
1429{
1430
1431    return (AE_OK);
1432}
1433
1434
1435/******************************************************************************
1436 *
1437 * FUNCTION:    AcpiOsReadMemory
1438 *
1439 * PARAMETERS:  Address             - Physical Memory Address to read
1440 *              Value               - Where value is placed
1441 *              Width               - Number of bits (8,16,32, or 64)
1442 *
1443 * RETURN:      Value read from physical memory address. Always returned
1444 *              as a 64-bit integer, regardless of the read width.
1445 *
1446 * DESCRIPTION: Read data from a physical memory address
1447 *
1448 *****************************************************************************/
1449
1450ACPI_STATUS
1451AcpiOsReadMemory (
1452    ACPI_PHYSICAL_ADDRESS   Address,
1453    UINT64                  *Value,
1454    UINT32                  Width)
1455{
1456
1457    switch (Width)
1458    {
1459    case 8:
1460    case 16:
1461    case 32:
1462    case 64:
1463
1464        *Value = 0;
1465        break;
1466
1467    default:
1468
1469        return (AE_BAD_PARAMETER);
1470    }
1471    return (AE_OK);
1472}
1473
1474
1475/******************************************************************************
1476 *
1477 * FUNCTION:    AcpiOsWriteMemory
1478 *
1479 * PARAMETERS:  Address             - Physical Memory Address to write
1480 *              Value               - Value to write
1481 *              Width               - Number of bits (8,16,32, or 64)
1482 *
1483 * RETURN:      None
1484 *
1485 * DESCRIPTION: Write data to a physical memory address
1486 *
1487 *****************************************************************************/
1488
1489ACPI_STATUS
1490AcpiOsWriteMemory (
1491    ACPI_PHYSICAL_ADDRESS   Address,
1492    UINT64                  Value,
1493    UINT32                  Width)
1494{
1495
1496    return (AE_OK);
1497}
1498
1499
1500/******************************************************************************
1501 *
1502 * FUNCTION:    AcpiOsReadable
1503 *
1504 * PARAMETERS:  Pointer             - Area to be verified
1505 *              Length              - Size of area
1506 *
1507 * RETURN:      TRUE if readable for entire length
1508 *
1509 * DESCRIPTION: Verify that a pointer is valid for reading
1510 *
1511 *****************************************************************************/
1512
1513BOOLEAN
1514AcpiOsReadable (
1515    void                    *Pointer,
1516    ACPI_SIZE               Length)
1517{
1518
1519    return (TRUE);
1520}
1521
1522
1523/******************************************************************************
1524 *
1525 * FUNCTION:    AcpiOsWritable
1526 *
1527 * PARAMETERS:  Pointer             - Area to be verified
1528 *              Length              - Size of area
1529 *
1530 * RETURN:      TRUE if writable for entire length
1531 *
1532 * DESCRIPTION: Verify that a pointer is valid for writing
1533 *
1534 *****************************************************************************/
1535
1536BOOLEAN
1537AcpiOsWritable (
1538    void                    *Pointer,
1539    ACPI_SIZE               Length)
1540{
1541
1542    return (TRUE);
1543}
1544
1545
1546/******************************************************************************
1547 *
1548 * FUNCTION:    AcpiOsSignal
1549 *
1550 * PARAMETERS:  Function            - ACPI A signal function code
1551 *              Info                - Pointer to function-dependent structure
1552 *
1553 * RETURN:      Status
1554 *
1555 * DESCRIPTION: Miscellaneous functions. Example implementation only.
1556 *
1557 *****************************************************************************/
1558
1559ACPI_STATUS
1560AcpiOsSignal (
1561    UINT32                  Function,
1562    void                    *Info)
1563{
1564
1565    switch (Function)
1566    {
1567    case ACPI_SIGNAL_FATAL:
1568
1569        break;
1570
1571    case ACPI_SIGNAL_BREAKPOINT:
1572
1573        break;
1574
1575    default:
1576
1577        break;
1578    }
1579
1580    return (AE_OK);
1581}
1582
1583/* Optional multi-thread support */
1584
1585#ifndef ACPI_SINGLE_THREADED
1586/******************************************************************************
1587 *
1588 * FUNCTION:    AcpiOsGetThreadId
1589 *
1590 * PARAMETERS:  None
1591 *
1592 * RETURN:      Id of the running thread
1593 *
1594 * DESCRIPTION: Get the ID of the current (running) thread
1595 *
1596 *****************************************************************************/
1597
1598ACPI_THREAD_ID
1599AcpiOsGetThreadId (
1600    void)
1601{
1602    pthread_t               thread;
1603
1604
1605    thread = pthread_self();
1606    return (ACPI_CAST_PTHREAD_T (thread));
1607}
1608
1609
1610/******************************************************************************
1611 *
1612 * FUNCTION:    AcpiOsExecute
1613 *
1614 * PARAMETERS:  Type                - Type of execution
1615 *              Function            - Address of the function to execute
1616 *              Context             - Passed as a parameter to the function
1617 *
1618 * RETURN:      Status.
1619 *
1620 * DESCRIPTION: Execute a new thread
1621 *
1622 *****************************************************************************/
1623
1624ACPI_STATUS
1625AcpiOsExecute (
1626    ACPI_EXECUTE_TYPE       Type,
1627    ACPI_OSD_EXEC_CALLBACK  Function,
1628    void                    *Context)
1629{
1630    pthread_t               thread;
1631    int                     ret;
1632
1633
1634    ret = pthread_create (&thread, NULL, (PTHREAD_CALLBACK) Function, Context);
1635    if (ret)
1636    {
1637        AcpiOsPrintf("Create thread failed");
1638    }
1639    return (0);
1640}
1641
1642#else /* ACPI_SINGLE_THREADED */
1643ACPI_THREAD_ID
1644AcpiOsGetThreadId (
1645    void)
1646{
1647    return (1);
1648}
1649
1650ACPI_STATUS
1651AcpiOsExecute (
1652    ACPI_EXECUTE_TYPE       Type,
1653    ACPI_OSD_EXEC_CALLBACK  Function,
1654    void                    *Context)
1655{
1656
1657    Function (Context);
1658
1659    return (AE_OK);
1660}
1661
1662#endif /* ACPI_SINGLE_THREADED */
1663
1664
1665/******************************************************************************
1666 *
1667 * FUNCTION:    AcpiOsWaitEventsComplete
1668 *
1669 * PARAMETERS:  None
1670 *
1671 * RETURN:      None
1672 *
1673 * DESCRIPTION: Wait for all asynchronous events to complete. This
1674 *              implementation does nothing.
1675 *
1676 *****************************************************************************/
1677
1678void
1679AcpiOsWaitEventsComplete (
1680    void)
1681{
1682    return;
1683}
1684