arch/all-pc/acpica/source/os_specific/service_layers/osunixxf.c

   1 /******************************************************************************
   2  *
   3  * Module Name: osunixxf - UNIX OSL interfaces
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2013, Intel Corp.
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions, and the following disclaimer,
  16  *    without modification.
  17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18  *    substantially similar to the "NO WARRANTY" disclaimer below
  19  *    ("Disclaimer") and any redistribution must be conditioned upon
  20  *    including a substantially similar Disclaimer requirement for further
  21  *    binary redistribution.
  22  * 3. Neither the names of the above-listed copyright holders nor the names
  23  *    of any contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * Alternatively, this software may be distributed under the terms of the
  27  * GNU General Public License ("GPL") version 2 as published by the Free
  28  * Software Foundation.
  29  *
  30  * NO WARRANTY
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGES.
  42  */
  43
  44
  45 /*
  46  * These interfaces are required in order to compile the ASL compiler and the
  47  * various ACPICA tools under Linux or other Unix-like system.
  48  */
  49 #include "acpi.h"
  50 #include "accommon.h"
  51 #include "amlcode.h"
  52 #include "acparser.h"
  53 #include "acdebug.h"
  54
  55 #include <stdio.h>
  56 #include <stdlib.h>
  57 #include <stdarg.h>
  58 #include <unistd.h>
  59 #include <sys/time.h>
  60 #include <semaphore.h>
  61 #include <pthread.h>
  62 #include <errno.h>
  63
  64 #define _COMPONENT          ACPI_OS_SERVICES
  65         ACPI_MODULE_NAME    ("osunixxf")
  66
  67
  68 extern FILE                    *AcpiGbl_DebugFile;
  69 FILE                           *AcpiGbl_OutputFile;
  70 BOOLEAN                        AcpiGbl_DebugTimeout = FALSE;
  71
  72
  73 /* Upcalls to AcpiExec */
  74
  75 ACPI_PHYSICAL_ADDRESS
  76 AeLocalGetRootPointer (
  77     void);
  78
  79 void
  80 AeTableOverride (
  81     ACPI_TABLE_HEADER       *ExistingTable,
  82     ACPI_TABLE_HEADER       **NewTable);
  83
  84 typedef void* (*PTHREAD_CALLBACK) (void *);
  85
  86 /* Buffer used by AcpiOsVprintf */
  87
  88 #define ACPI_VPRINTF_BUFFER_SIZE    512
  89 #define _ASCII_NEWLINE              '\n'
  90
  91 /* Terminal support for AcpiExec only */
  92
  93 #ifdef ACPI_EXEC_APP
  94 #include <termios.h>
  95
  96 struct termios              OriginalTermAttributes;
  97
  98 ACPI_STATUS
  99 AcpiUtReadLine (
 100     char                    *Buffer,
 101     UINT32                  BufferLength,
 102     UINT32                  *BytesRead);
 103
 104 static void
 105 OsEnterLineEditMode (
 106     void);
 107
 108 static void
 109 OsExitLineEditMode (
 110     void);
 111
 112
 113 /******************************************************************************
 114  *
 115  * FUNCTION:    OsEnterLineEditMode, OsExitLineEditMode
 116  *
 117  * PARAMETERS:  None
 118  *
 119  * RETURN:      None
 120  *
 121  * DESCRIPTION: Enter/Exit the raw character input mode for the terminal.
 122  *
 123  * Interactive line-editing support for the AML debugger. Used with the
 124  * common/acgetline module.
 125  *
 126  * readline() is not used because of non-portability. It is not available
 127  * on all systems, and if it is, often the package must be manually installed.
 128  *
 129  * Therefore, we use the POSIX tcgetattr/tcsetattr and do the minimal line
 130  * editing that we need in AcpiOsGetLine.
 131  *
 132  * If the POSIX tcgetattr/tcsetattr interfaces are unavailable, these
 133  * calls will also work:
 134  *     For OsEnterLineEditMode: system ("stty cbreak -echo")
 135  *     For OsExitLineEditMode:  system ("stty cooked echo")
 136  *
 137  *****************************************************************************/
 138
 139 static void
 140 OsEnterLineEditMode (
 141     void)
 142 {
 143     struct termios          LocalTermAttributes;
 144
 145
 146     /* Get and keep the original attributes */
 147
 148     if (tcgetattr (STDIN_FILENO, &OriginalTermAttributes))
 149     {
 150         fprintf (stderr, "Could not get/set terminal attributes!\n");
 151         return;
 152     }
 153
 154     /* Set the new attributes to enable raw character input */
 155
 156     memcpy (&LocalTermAttributes, &OriginalTermAttributes,
 157         sizeof (struct termios));
 158
 159     LocalTermAttributes.c_lflag &= ~(ICANON | ECHO);
 160     LocalTermAttributes.c_cc[VMIN] = 1;
 161     LocalTermAttributes.c_cc[VTIME] = 0;
 162
 163     tcsetattr (STDIN_FILENO, TCSANOW, &LocalTermAttributes);
 164 }
 165
 166 static void
 167 OsExitLineEditMode (
 168     void)
 169 {
 170     /* Set terminal attributes back to the original values */
 171
 172     tcsetattr (STDIN_FILENO, TCSANOW, &OriginalTermAttributes);
 173 }
 174
 175
 176 #else
 177
 178 /* These functions are not needed for other ACPICA utilities */
 179
 180 #define OsEnterLineEditMode()
 181 #define OsExitLineEditMode()
 182 #endif
 183
 184
 185 /******************************************************************************
 186  *
 187  * FUNCTION:    AcpiOsInitialize, AcpiOsTerminate
 188  *
 189  * PARAMETERS:  None
 190  *
 191  * RETURN:      Status
 192  *
 193  * DESCRIPTION: Initialize and terminate this module.
 194  *
 195  *****************************************************************************/
 196
 197 ACPI_STATUS
 198 AcpiOsInitialize (
 199     void)
 200 {
 201
 202     AcpiGbl_OutputFile = stdout;
 203
 204     OsEnterLineEditMode ();
 205     return (AE_OK);
 206 }
 207
 208 ACPI_STATUS
 209 AcpiOsTerminate (
 210     void)
 211 {
 212
 213     OsExitLineEditMode ();
 214     return (AE_OK);
 215 }
 216
 217
 218 /******************************************************************************
 219  *
 220  * FUNCTION:    AcpiOsGetRootPointer
 221  *
 222  * PARAMETERS:  None
 223  *
 224  * RETURN:      RSDP physical address
 225  *
 226  * DESCRIPTION: Gets the ACPI root pointer (RSDP)
 227  *
 228  *****************************************************************************/
 229
 230 ACPI_PHYSICAL_ADDRESS
 231 AcpiOsGetRootPointer (
 232     void)
 233 {
 234
 235     return (AeLocalGetRootPointer ());
 236 }
 237
 238
 239 /******************************************************************************
 240  *
 241  * FUNCTION:    AcpiOsPredefinedOverride
 242  *
 243  * PARAMETERS:  InitVal             - Initial value of the predefined object
 244  *              NewVal              - The new value for the object
 245  *
 246  * RETURN:      Status, pointer to value. Null pointer returned if not
 247  *              overriding.
 248  *
 249  * DESCRIPTION: Allow the OS to override predefined names
 250  *
 251  *****************************************************************************/
 252
 253 ACPI_STATUS
 254 AcpiOsPredefinedOverride (
 255     const ACPI_PREDEFINED_NAMES *InitVal,
 256     ACPI_STRING                 *NewVal)
 257 {
 258
 259     if (!InitVal || !NewVal)
 260     {
 261         return (AE_BAD_PARAMETER);
 262     }
 263
 264     *NewVal = NULL;
 265     return (AE_OK);
 266 }
 267
 268
 269 /******************************************************************************
 270  *
 271  * FUNCTION:    AcpiOsTableOverride
 272  *
 273  * PARAMETERS:  ExistingTable       - Header of current table (probably
 274  *                                    firmware)
 275  *              NewTable            - Where an entire new table is returned.
 276  *
 277  * RETURN:      Status, pointer to new table. Null pointer returned if no
 278  *              table is available to override
 279  *
 280  * DESCRIPTION: Return a different version of a table if one is available
 281  *
 282  *****************************************************************************/
 283
 284 ACPI_STATUS
 285 AcpiOsTableOverride (
 286     ACPI_TABLE_HEADER       *ExistingTable,
 287     ACPI_TABLE_HEADER       **NewTable)
 288 {
 289
 290     if (!ExistingTable || !NewTable)
 291     {
 292         return (AE_BAD_PARAMETER);
 293     }
 294
 295     *NewTable = NULL;
 296
 297 #ifdef ACPI_EXEC_APP
 298
 299     AeTableOverride (ExistingTable, NewTable);
 300     return (AE_OK);
 301 #else
 302
 303     return (AE_NO_ACPI_TABLES);
 304 #endif
 305 }
 306
 307
 308 /******************************************************************************
 309  *
 310  * FUNCTION:    AcpiOsPhysicalTableOverride
 311  *
 312  * PARAMETERS:  ExistingTable       - Header of current table (probably firmware)
 313  *              NewAddress          - Where new table address is returned
 314  *                                    (Physical address)
 315  *              NewTableLength      - Where new table length is returned
 316  *
 317  * RETURN:      Status, address/length of new table. Null pointer returned
 318  *              if no table is available to override.
 319  *
 320  * DESCRIPTION: Returns AE_SUPPORT, function not used in user space.
 321  *
 322  *****************************************************************************/
 323
 324 ACPI_STATUS
 325 AcpiOsPhysicalTableOverride (
 326     ACPI_TABLE_HEADER       *ExistingTable,
 327     ACPI_PHYSICAL_ADDRESS   *NewAddress,
 328     UINT32                  *NewTableLength)
 329 {
 330
 331     return (AE_SUPPORT);
 332 }
 333
 334
 335 /******************************************************************************
 336  *
 337  * FUNCTION:    AcpiOsRedirectOutput
 338  *
 339  * PARAMETERS:  Destination         - An open file handle/pointer
 340  *
 341  * RETURN:      None
 342  *
 343  * DESCRIPTION: Causes redirect of AcpiOsPrintf and AcpiOsVprintf
 344  *
 345  *****************************************************************************/
 346
 347 void
 348 AcpiOsRedirectOutput (
 349     void                    *Destination)
 350 {
 351
 352     AcpiGbl_OutputFile = Destination;
 353 }
 354
 355
 356 /******************************************************************************
 357  *
 358  * FUNCTION:    AcpiOsPrintf
 359  *
 360  * PARAMETERS:  fmt, ...            - Standard printf format
 361  *
 362  * RETURN:      None
 363  *
 364  * DESCRIPTION: Formatted output. Note: very similar to AcpiOsVprintf
 365  *              (performance), changes should be tracked in both functions.
 366  *
 367  *****************************************************************************/
 368
 369 void ACPI_INTERNAL_VAR_XFACE
 370 AcpiOsPrintf (
 371     const char              *Fmt,
 372     ...)
 373 {
 374     va_list                 Args;
 375     UINT8                   Flags;
 376
 377
 378     Flags = AcpiGbl_DbOutputFlags;
 379     if (Flags & ACPI_DB_REDIRECTABLE_OUTPUT)
 380     {
 381         /* Output is directable to either a file (if open) or the console */
 382
 383         if (AcpiGbl_DebugFile)
 384         {
 385             /* Output file is open, send the output there */
 386
 387             va_start (Args, Fmt);
 388             vfprintf (AcpiGbl_DebugFile, Fmt, Args);
 389             va_end (Args);
 390         }
 391         else
 392         {
 393             /* No redirection, send output to console (once only!) */
 394
 395             Flags |= ACPI_DB_CONSOLE_OUTPUT;
 396         }
 397     }
 398
 399     if (Flags & ACPI_DB_CONSOLE_OUTPUT)
 400     {
 401         va_start (Args, Fmt);
 402         vfprintf (AcpiGbl_OutputFile, Fmt, Args);
 403         va_end (Args);
 404     }
 405 }
 406
 407
 408 /******************************************************************************
 409  *
 410  * FUNCTION:    AcpiOsVprintf
 411  *
 412  * PARAMETERS:  fmt                 - Standard printf format
 413  *              args                - Argument list
 414  *
 415  * RETURN:      None
 416  *
 417  * DESCRIPTION: Formatted output with argument list pointer. Note: very
 418  *              similar to AcpiOsPrintf, changes should be tracked in both
 419  *              functions.
 420  *
 421  *****************************************************************************/
 422
 423 void
 424 AcpiOsVprintf (
 425     const char              *Fmt,
 426     va_list                 Args)
 427 {
 428     UINT8                   Flags;
 429     char                    Buffer[ACPI_VPRINTF_BUFFER_SIZE];
 430
 431
 432     /*
 433      * We build the output string in a local buffer because we may be
 434      * outputting the buffer twice. Using vfprintf is problematic because
 435      * some implementations modify the args pointer/structure during
 436      * execution. Thus, we use the local buffer for portability.
 437      *
 438      * Note: Since this module is intended for use by the various ACPICA
 439      * utilities/applications, we can safely declare the buffer on the stack.
 440      * Also, This function is used for relatively small error messages only.
 441      */
 442     vsnprintf (Buffer, ACPI_VPRINTF_BUFFER_SIZE, Fmt, Args);
 443
 444     Flags = AcpiGbl_DbOutputFlags;
 445     if (Flags & ACPI_DB_REDIRECTABLE_OUTPUT)
 446     {
 447         /* Output is directable to either a file (if open) or the console */
 448
 449         if (AcpiGbl_DebugFile)
 450         {
 451             /* Output file is open, send the output there */
 452
 453             fputs (Buffer, AcpiGbl_DebugFile);
 454         }
 455         else
 456         {
 457             /* No redirection, send output to console (once only!) */
 458
 459             Flags |= ACPI_DB_CONSOLE_OUTPUT;
 460         }
 461     }
 462
 463     if (Flags & ACPI_DB_CONSOLE_OUTPUT)
 464     {
 465         fputs (Buffer, AcpiGbl_OutputFile);
 466     }
 467 }
 468
 469
 470 #ifndef ACPI_EXEC_APP
 471 /******************************************************************************
 472  *
 473  * FUNCTION:    AcpiOsGetLine
 474  *
 475  * PARAMETERS:  Buffer              - Where to return the command line
 476  *              BufferLength        - Maximum length of Buffer
 477  *              BytesRead           - Where the actual byte count is returned
 478  *
 479  * RETURN:      Status and actual bytes read
 480  *
 481  * DESCRIPTION: Get the next input line from the terminal. NOTE: For the
 482  *              AcpiExec utility, we use the acgetline module instead to
 483  *              provide line-editing and history support.
 484  *
 485  *****************************************************************************/
 486
 487 ACPI_STATUS
 488 AcpiOsGetLine (
 489     char                    *Buffer,
 490     UINT32                  BufferLength,
 491     UINT32                  *BytesRead)
 492 {
 493     int                     InputChar;
 494     UINT32                  EndOfLine;
 495
 496
 497     /* Standard AcpiOsGetLine for all utilities except AcpiExec */
 498
 499     for (EndOfLine = 0; ; EndOfLine++)
 500     {
 501         if (EndOfLine >= BufferLength)
 502         {
 503             return (AE_BUFFER_OVERFLOW);
 504         }
 505
 506         if ((InputChar = getchar ()) == EOF)
 507         {
 508             return (AE_ERROR);
 509         }
 510
 511         if (!InputChar || InputChar == _ASCII_NEWLINE)
 512         {
 513             break;
 514         }
 515
 516         Buffer[EndOfLine] = (char) InputChar;
 517     }
 518
 519     /* Null terminate the buffer */
 520
 521     Buffer[EndOfLine] = 0;
 522
 523     /* Return the number of bytes in the string */
 524
 525     if (BytesRead)
 526     {
 527         *BytesRead = EndOfLine;
 528     }
 529
 530     return (AE_OK);
 531 }
 532 #endif
 533
 534
 535 /******************************************************************************
 536  *
 537  * FUNCTION:    AcpiOsMapMemory
 538  *
 539  * PARAMETERS:  where               - Physical address of memory to be mapped
 540  *              length              - How much memory to map
 541  *
 542  * RETURN:      Pointer to mapped memory. Null on error.
 543  *
 544  * DESCRIPTION: Map physical memory into caller's address space
 545  *
 546  *****************************************************************************/
 547
 548 void *
 549 AcpiOsMapMemory (
 550     ACPI_PHYSICAL_ADDRESS   where,
 551     ACPI_SIZE               length)
 552 {
 553
 554     return (ACPI_TO_POINTER ((ACPI_SIZE) where));
 555 }
 556
 557
 558 /******************************************************************************
 559  *
 560  * FUNCTION:    AcpiOsUnmapMemory
 561  *
 562  * PARAMETERS:  where               - Logical address of memory to be unmapped
 563  *              length              - How much memory to unmap
 564  *
 565  * RETURN:      None.
 566  *
 567  * DESCRIPTION: Delete a previously created mapping. Where and Length must
 568  *              correspond to a previous mapping exactly.
 569  *
 570  *****************************************************************************/
 571
 572 void
 573 AcpiOsUnmapMemory (
 574     void                    *where,
 575     ACPI_SIZE               length)
 576 {
 577
 578     return;
 579 }
 580
 581
 582 /******************************************************************************
 583  *
 584  * FUNCTION:    AcpiOsAllocate
 585  *
 586  * PARAMETERS:  Size                - Amount to allocate, in bytes
 587  *
 588  * RETURN:      Pointer to the new allocation. Null on error.
 589  *
 590  * DESCRIPTION: Allocate memory. Algorithm is dependent on the OS.
 591  *
 592  *****************************************************************************/
 593
 594 void *
 595 AcpiOsAllocate (
 596     ACPI_SIZE               size)
 597 {
 598     void                    *Mem;
 599
 600
 601     Mem = (void *) malloc ((size_t) size);
 602     return (Mem);
 603 }
 604
 605
 606 /******************************************************************************
 607  *
 608  * FUNCTION:    AcpiOsFree
 609  *
 610  * PARAMETERS:  mem                 - Pointer to previously allocated memory
 611  *
 612  * RETURN:      None.
 613  *
 614  * DESCRIPTION: Free memory allocated via AcpiOsAllocate
 615  *
 616  *****************************************************************************/
 617
 618 void
 619 AcpiOsFree (
 620     void                    *mem)
 621 {
 622
 623     free (mem);
 624 }
 625
 626
 627 #ifdef ACPI_SINGLE_THREADED
 628 /******************************************************************************
 629  *
 630  * FUNCTION:    Semaphore stub functions
 631  *
 632  * DESCRIPTION: Stub functions used for single-thread applications that do
 633  *              not require semaphore synchronization. Full implementations
 634  *              of these functions appear after the stubs.
 635  *
 636  *****************************************************************************/
 637
 638 ACPI_STATUS
 639 AcpiOsCreateSemaphore (
 640     UINT32              MaxUnits,
 641     UINT32              InitialUnits,
 642     ACPI_HANDLE         *OutHandle)
 643 {
 644     *OutHandle = (ACPI_HANDLE) 1;
 645     return (AE_OK);
 646 }
 647
 648 ACPI_STATUS
 649 AcpiOsDeleteSemaphore (
 650     ACPI_HANDLE         Handle)
 651 {
 652     return (AE_OK);
 653 }
 654
 655 ACPI_STATUS
 656 AcpiOsWaitSemaphore (
 657     ACPI_HANDLE         Handle,
 658     UINT32              Units,
 659     UINT16              Timeout)
 660 {
 661     return (AE_OK);
 662 }
 663
 664 ACPI_STATUS
 665 AcpiOsSignalSemaphore (
 666     ACPI_HANDLE         Handle,
 667     UINT32              Units)
 668 {
 669     return (AE_OK);
 670 }
 671
 672 #else
 673 /******************************************************************************
 674  *
 675  * FUNCTION:    AcpiOsCreateSemaphore
 676  *
 677  * PARAMETERS:  InitialUnits        - Units to be assigned to the new semaphore
 678  *              OutHandle           - Where a handle will be returned
 679  *
 680  * RETURN:      Status
 681  *
 682  * DESCRIPTION: Create an OS semaphore
 683  *
 684  *****************************************************************************/
 685
 686 ACPI_STATUS
 687 AcpiOsCreateSemaphore (
 688     UINT32              MaxUnits,
 689     UINT32              InitialUnits,
 690     ACPI_HANDLE         *OutHandle)
 691 {
 692     sem_t               *Sem;
 693
 694
 695     if (!OutHandle)
 696     {
 697         return (AE_BAD_PARAMETER);
 698     }
 699
 700 #ifdef __APPLE__
 701     {
 702         char            *SemaphoreName = tmpnam (NULL);
 703
 704         Sem = sem_open (SemaphoreName, O_EXCL|O_CREAT, 0755, InitialUnits);
 705         if (!Sem)
 706         {
 707             return (AE_NO_MEMORY);
 708         }
 709         sem_unlink (SemaphoreName); /* This just deletes the name */
 710     }
 711
 712 #else
 713     Sem = AcpiOsAllocate (sizeof (sem_t));
 714     if (!Sem)
 715     {
 716         return (AE_NO_MEMORY);
 717     }
 718
 719     if (sem_init (Sem, 0, InitialUnits) == -1)
 720     {
 721         AcpiOsFree (Sem);
 722         return (AE_BAD_PARAMETER);
 723     }
 724 #endif
 725
 726     *OutHandle = (ACPI_HANDLE) Sem;
 727     return (AE_OK);
 728 }
 729
 730
 731 /******************************************************************************
 732  *
 733  * FUNCTION:    AcpiOsDeleteSemaphore
 734  *
 735  * PARAMETERS:  Handle              - Handle returned by AcpiOsCreateSemaphore
 736  *
 737  * RETURN:      Status
 738  *
 739  * DESCRIPTION: Delete an OS semaphore
 740  *
 741  *****************************************************************************/
 742
 743 ACPI_STATUS
 744 AcpiOsDeleteSemaphore (
 745     ACPI_HANDLE         Handle)
 746 {
 747     sem_t               *Sem = (sem_t *) Handle;
 748
 749
 750     if (!Sem)
 751     {
 752         return (AE_BAD_PARAMETER);
 753     }
 754
 755     if (sem_destroy (Sem) == -1)
 756     {
 757         return (AE_BAD_PARAMETER);
 758     }
 759
 760     return (AE_OK);
 761 }
 762
 763
 764 /******************************************************************************
 765  *
 766  * FUNCTION:    AcpiOsWaitSemaphore
 767  *
 768  * PARAMETERS:  Handle              - Handle returned by AcpiOsCreateSemaphore
 769  *              Units               - How many units to wait for
 770  *              MsecTimeout         - How long to wait (milliseconds)
 771  *
 772  * RETURN:      Status
 773  *
 774  * DESCRIPTION: Wait for units
 775  *
 776  *****************************************************************************/
 777
 778 ACPI_STATUS
 779 AcpiOsWaitSemaphore (
 780     ACPI_HANDLE         Handle,
 781     UINT32              Units,
 782     UINT16              MsecTimeout)
 783 {
 784     ACPI_STATUS         Status = AE_OK;
 785     sem_t               *Sem = (sem_t *) Handle;
 786 #ifndef ACPI_USE_ALTERNATE_TIMEOUT
 787     struct timespec     Time;
 788     int                 RetVal;
 789 #endif
 790
 791
 792     if (!Sem)
 793     {
 794         return (AE_BAD_PARAMETER);
 795     }
 796
 797     switch (MsecTimeout)
 798     {
 799     /*
 800      * No Wait:
 801      * --------
 802      * A zero timeout value indicates that we shouldn't wait - just
 803      * acquire the semaphore if available otherwise return AE_TIME
 804      * (a.k.a. 'would block').
 805      */
 806     case 0:
 807
 808         if (sem_trywait(Sem) == -1)
 809         {
 810             Status = (AE_TIME);
 811         }
 812         break;
 813
 814     /* Wait Indefinitely */
 815
 816     case ACPI_WAIT_FOREVER:
 817
 818         if (sem_wait (Sem))
 819         {
 820             Status = (AE_TIME);
 821         }
 822         break;
 823
 824     /* Wait with MsecTimeout */
 825
 826     default:
 827
 828 #ifdef ACPI_USE_ALTERNATE_TIMEOUT
 829         /*
 830          * Alternate timeout mechanism for environments where
 831          * sem_timedwait is not available or does not work properly.
 832          */
 833         while (MsecTimeout)
 834         {
 835             if (sem_trywait (Sem) == 0)
 836             {
 837                 /* Got the semaphore */
 838                 return (AE_OK);
 839             }
 840
 841             if (MsecTimeout >= 10)
 842             {
 843                 MsecTimeout -= 10;
 844                 usleep (10 * ACPI_USEC_PER_MSEC); /* ten milliseconds */
 845             }
 846             else
 847             {
 848                 MsecTimeout--;
 849                 usleep (ACPI_USEC_PER_MSEC); /* one millisecond */
 850             }
 851         }
 852         Status = (AE_TIME);
 853 #else
 854         /*
 855          * The interface to sem_timedwait is an absolute time, so we need to
 856          * get the current time, then add in the millisecond Timeout value.
 857          */
 858         if (clock_gettime (CLOCK_REALTIME, &Time) == -1)
 859         {
 860             perror ("clock_gettime");
 861             return (AE_TIME);
 862         }
 863
 864         Time.tv_sec += (MsecTimeout / ACPI_MSEC_PER_SEC);
 865         Time.tv_nsec += ((MsecTimeout % ACPI_MSEC_PER_SEC) * ACPI_NSEC_PER_MSEC);
 866
 867         /* Handle nanosecond overflow (field must be less than one second) */
 868
 869         if (Time.tv_nsec >= ACPI_NSEC_PER_SEC)
 870         {
 871             Time.tv_sec += (Time.tv_nsec / ACPI_NSEC_PER_SEC);
 872             Time.tv_nsec = (Time.tv_nsec % ACPI_NSEC_PER_SEC);
 873         }
 874
 875         while (((RetVal = sem_timedwait (Sem, &Time)) == -1) && (errno == EINTR))
 876         {
 877             continue;
 878         }
 879
 880         if (RetVal != 0)
 881         {
 882             if (errno != ETIMEDOUT)
 883             {
 884                 perror ("sem_timedwait");
 885             }
 886             Status = (AE_TIME);
 887         }
 888 #endif
 889         break;
 890     }
 891
 892     return (Status);
 893 }
 894
 895
 896 /******************************************************************************
 897  *
 898  * FUNCTION:    AcpiOsSignalSemaphore
 899  *
 900  * PARAMETERS:  Handle              - Handle returned by AcpiOsCreateSemaphore
 901  *              Units               - Number of units to send
 902  *
 903  * RETURN:      Status
 904  *
 905  * DESCRIPTION: Send units
 906  *
 907  *****************************************************************************/
 908
 909 ACPI_STATUS
 910 AcpiOsSignalSemaphore (
 911     ACPI_HANDLE         Handle,
 912     UINT32              Units)
 913 {
 914     sem_t               *Sem = (sem_t *)Handle;
 915
 916
 917     if (!Sem)
 918     {
 919         return (AE_BAD_PARAMETER);
 920     }
 921
 922     if (sem_post (Sem) == -1)
 923     {
 924         return (AE_LIMIT);
 925     }
 926
 927     return (AE_OK);
 928 }
 929
 930 #endif /* ACPI_SINGLE_THREADED */
 931
 932
 933 /******************************************************************************
 934  *
 935  * FUNCTION:    Spinlock interfaces
 936  *
 937  * DESCRIPTION: Map these interfaces to semaphore interfaces
 938  *
 939  *****************************************************************************/
 940
 941 ACPI_STATUS
 942 AcpiOsCreateLock (
 943     ACPI_SPINLOCK           *OutHandle)
 944 {
 945
 946     return (AcpiOsCreateSemaphore (1, 1, OutHandle));
 947 }
 948
 949
 950 void
 951 AcpiOsDeleteLock (
 952     ACPI_SPINLOCK           Handle)
 953 {
 954     AcpiOsDeleteSemaphore (Handle);
 955 }
 956
 957
 958 ACPI_CPU_FLAGS
 959 AcpiOsAcquireLock (
 960     ACPI_HANDLE             Handle)
 961 {
 962     AcpiOsWaitSemaphore (Handle, 1, 0xFFFF);
 963     return (0);
 964 }
 965
 966
 967 void
 968 AcpiOsReleaseLock (
 969     ACPI_SPINLOCK           Handle,
 970     ACPI_CPU_FLAGS          Flags)
 971 {
 972     AcpiOsSignalSemaphore (Handle, 1);
 973 }
 974
 975
 976 /******************************************************************************
 977  *
 978  * FUNCTION:    AcpiOsInstallInterruptHandler
 979  *
 980  * PARAMETERS:  InterruptNumber     - Level handler should respond to.
 981  *              Isr                 - Address of the ACPI interrupt handler
 982  *              ExceptPtr           - Where status is returned
 983  *
 984  * RETURN:      Handle to the newly installed handler.
 985  *
 986  * DESCRIPTION: Install an interrupt handler. Used to install the ACPI
 987  *              OS-independent handler.
 988  *
 989  *****************************************************************************/
 990
 991 UINT32
 992 AcpiOsInstallInterruptHandler (
 993     UINT32                  InterruptNumber,
 994     ACPI_OSD_HANDLER        ServiceRoutine,
 995     void                    *Context)
 996 {
 997
 998     return (AE_OK);
 999 }
1000
1001
1002 /******************************************************************************
1003  *
1004  * FUNCTION:    AcpiOsRemoveInterruptHandler
1005  *
1006  * PARAMETERS:  Handle              - Returned when handler was installed
1007  *
1008  * RETURN:      Status
1009  *
1010  * DESCRIPTION: Uninstalls an interrupt handler.
1011  *
1012  *****************************************************************************/
1013
1014 ACPI_STATUS
1015 AcpiOsRemoveInterruptHandler (
1016     UINT32                  InterruptNumber,
1017     ACPI_OSD_HANDLER        ServiceRoutine)
1018 {
1019
1020     return (AE_OK);
1021 }
1022
1023
1024 /******************************************************************************
1025  *
1026  * FUNCTION:    AcpiOsStall
1027  *
1028  * PARAMETERS:  microseconds        - Time to sleep
1029  *
1030  * RETURN:      Blocks until sleep is completed.
1031  *
1032  * DESCRIPTION: Sleep at microsecond granularity
1033  *
1034  *****************************************************************************/
1035
1036 void
1037 AcpiOsStall (
1038     UINT32                  microseconds)
1039 {
1040
1041     if (microseconds)
1042     {
1043         usleep (microseconds);
1044     }
1045 }
1046
1047
1048 /******************************************************************************
1049  *
1050  * FUNCTION:    AcpiOsSleep
1051  *
1052  * PARAMETERS:  milliseconds        - Time to sleep
1053  *
1054  * RETURN:      Blocks until sleep is completed.
1055  *
1056  * DESCRIPTION: Sleep at millisecond granularity
1057  *
1058  *****************************************************************************/
1059
1060 void
1061 AcpiOsSleep (
1062     UINT64                  milliseconds)
1063 {
1064
1065     /* Sleep for whole seconds */
1066
1067     sleep (milliseconds / ACPI_MSEC_PER_SEC);
1068
1069     /*
1070      * Sleep for remaining microseconds.
1071      * Arg to usleep() is in usecs and must be less than 1,000,000 (1 second).
1072      */
1073     usleep ((milliseconds % ACPI_MSEC_PER_SEC) * ACPI_USEC_PER_MSEC);
1074 }
1075
1076
1077 /******************************************************************************
1078  *
1079  * FUNCTION:    AcpiOsGetTimer
1080  *
1081  * PARAMETERS:  None
1082  *
1083  * RETURN:      Current time in 100 nanosecond units
1084  *
1085  * DESCRIPTION: Get the current system time
1086  *
1087  *****************************************************************************/
1088
1089 UINT64
1090 AcpiOsGetTimer (
1091     void)
1092 {
1093     struct timeval          time;
1094
1095
1096     /* This timer has sufficient resolution for user-space application code */
1097
1098     gettimeofday (&time, NULL);
1099
1100     /* (Seconds * 10^7 = 100ns(10^-7)) + (Microseconds(10^-6) * 10^1 = 100ns) */
1101
1102     return (((UINT64) time.tv_sec * ACPI_100NSEC_PER_SEC) +
1103             ((UINT64) time.tv_usec * ACPI_100NSEC_PER_USEC));
1104 }
1105
1106
1107 /******************************************************************************
1108  *
1109  * FUNCTION:    AcpiOsReadPciConfiguration
1110  *
1111  * PARAMETERS:  PciId               - Seg/Bus/Dev
1112  *              Register            - Device Register
1113  *              Value               - Buffer where value is placed
1114  *              Width               - Number of bits
1115  *
1116  * RETURN:      Status
1117  *
1118  * DESCRIPTION: Read data from PCI configuration space
1119  *
1120  *****************************************************************************/
1121
1122 ACPI_STATUS
1123 AcpiOsReadPciConfiguration (
1124     ACPI_PCI_ID             *PciId,
1125     UINT32                  Register,
1126     UINT64                  *Value,
1127     UINT32                  Width)
1128 {
1129
1130     *Value = 0;
1131     return (AE_OK);
1132 }
1133
1134
1135 /******************************************************************************
1136  *
1137  * FUNCTION:    AcpiOsWritePciConfiguration
1138  *
1139  * PARAMETERS:  PciId               - Seg/Bus/Dev
1140  *              Register            - Device Register
1141  *              Value               - Value to be written
1142  *              Width               - Number of bits
1143  *
1144  * RETURN:      Status.
1145  *
1146  * DESCRIPTION: Write data to PCI configuration space
1147  *
1148  *****************************************************************************/
1149
1150 ACPI_STATUS
1151 AcpiOsWritePciConfiguration (
1152     ACPI_PCI_ID             *PciId,
1153     UINT32                  Register,
1154     UINT64                  Value,
1155     UINT32                  Width)
1156 {
1157
1158     return (AE_OK);
1159 }
1160
1161
1162 /******************************************************************************
1163  *
1164  * FUNCTION:    AcpiOsReadPort
1165  *
1166  * PARAMETERS:  Address             - Address of I/O port/register to read
1167  *              Value               - Where value is placed
1168  *              Width               - Number of bits
1169  *
1170  * RETURN:      Value read from port
1171  *
1172  * DESCRIPTION: Read data from an I/O port or register
1173  *
1174  *****************************************************************************/
1175
1176 ACPI_STATUS
1177 AcpiOsReadPort (
1178     ACPI_IO_ADDRESS         Address,
1179     UINT32                  *Value,
1180     UINT32                  Width)
1181 {
1182
1183     switch (Width)
1184     {
1185     case 8:
1186
1187         *Value = 0xFF;
1188         break;
1189
1190     case 16:
1191
1192         *Value = 0xFFFF;
1193         break;
1194
1195     case 32:
1196
1197         *Value = 0xFFFFFFFF;
1198         break;
1199
1200     default:
1201
1202         return (AE_BAD_PARAMETER);
1203     }
1204
1205     return (AE_OK);
1206 }
1207
1208
1209 /******************************************************************************
1210  *
1211  * FUNCTION:    AcpiOsWritePort
1212  *
1213  * PARAMETERS:  Address             - Address of I/O port/register to write
1214  *              Value               - Value to write
1215  *              Width               - Number of bits
1216  *
1217  * RETURN:      None
1218  *
1219  * DESCRIPTION: Write data to an I/O port or register
1220  *
1221  *****************************************************************************/
1222
1223 ACPI_STATUS
1224 AcpiOsWritePort (
1225     ACPI_IO_ADDRESS         Address,
1226     UINT32                  Value,
1227     UINT32                  Width)
1228 {
1229
1230     return (AE_OK);
1231 }
1232
1233
1234 /******************************************************************************
1235  *
1236  * FUNCTION:    AcpiOsReadMemory
1237  *
1238  * PARAMETERS:  Address             - Physical Memory Address to read
1239  *              Value               - Where value is placed
1240  *              Width               - Number of bits (8,16,32, or 64)
1241  *
1242  * RETURN:      Value read from physical memory address. Always returned
1243  *              as a 64-bit integer, regardless of the read width.
1244  *
1245  * DESCRIPTION: Read data from a physical memory address
1246  *
1247  *****************************************************************************/
1248
1249 ACPI_STATUS
1250 AcpiOsReadMemory (
1251     ACPI_PHYSICAL_ADDRESS   Address,
1252     UINT64                  *Value,
1253     UINT32                  Width)
1254 {
1255
1256     switch (Width)
1257     {
1258     case 8:
1259     case 16:
1260     case 32:
1261     case 64:
1262
1263         *Value = 0;
1264         break;
1265
1266     default:
1267
1268         return (AE_BAD_PARAMETER);
1269     }
1270     return (AE_OK);
1271 }
1272
1273
1274 /******************************************************************************
1275  *
1276  * FUNCTION:    AcpiOsWriteMemory
1277  *
1278  * PARAMETERS:  Address             - Physical Memory Address to write
1279  *              Value               - Value to write
1280  *              Width               - Number of bits (8,16,32, or 64)
1281  *
1282  * RETURN:      None
1283  *
1284  * DESCRIPTION: Write data to a physical memory address
1285  *
1286  *****************************************************************************/
1287
1288 ACPI_STATUS
1289 AcpiOsWriteMemory (
1290     ACPI_PHYSICAL_ADDRESS   Address,
1291     UINT64                  Value,
1292     UINT32                  Width)
1293 {
1294
1295     return (AE_OK);
1296 }
1297
1298
1299 /******************************************************************************
1300  *
1301  * FUNCTION:    AcpiOsReadable
1302  *
1303  * PARAMETERS:  Pointer             - Area to be verified
1304  *              Length              - Size of area
1305  *
1306  * RETURN:      TRUE if readable for entire length
1307  *
1308  * DESCRIPTION: Verify that a pointer is valid for reading
1309  *
1310  *****************************************************************************/
1311
1312 BOOLEAN
1313 AcpiOsReadable (
1314     void                    *Pointer,
1315     ACPI_SIZE               Length)
1316 {
1317
1318     return (TRUE);
1319 }
1320
1321
1322 /******************************************************************************
1323  *
1324  * FUNCTION:    AcpiOsWritable
1325  *
1326  * PARAMETERS:  Pointer             - Area to be verified
1327  *              Length              - Size of area
1328  *
1329  * RETURN:      TRUE if writable for entire length
1330  *
1331  * DESCRIPTION: Verify that a pointer is valid for writing
1332  *
1333  *****************************************************************************/
1334
1335 BOOLEAN
1336 AcpiOsWritable (
1337     void                    *Pointer,
1338     ACPI_SIZE               Length)
1339 {
1340
1341     return (TRUE);
1342 }
1343
1344
1345 /******************************************************************************
1346  *
1347  * FUNCTION:    AcpiOsSignal
1348  *
1349  * PARAMETERS:  Function            - ACPI CA signal function code
1350  *              Info                - Pointer to function-dependent structure
1351  *
1352  * RETURN:      Status
1353  *
1354  * DESCRIPTION: Miscellaneous functions. Example implementation only.
1355  *
1356  *****************************************************************************/
1357
1358 ACPI_STATUS
1359 AcpiOsSignal (
1360     UINT32                  Function,
1361     void                    *Info)
1362 {
1363
1364     switch (Function)
1365     {
1366     case ACPI_SIGNAL_FATAL:
1367
1368         break;
1369
1370     case ACPI_SIGNAL_BREAKPOINT:
1371
1372         break;
1373
1374     default:
1375
1376         break;
1377     }
1378
1379     return (AE_OK);
1380 }
1381
1382 /* Optional multi-thread support */
1383
1384 #ifndef ACPI_SINGLE_THREADED
1385 /******************************************************************************
1386  *
1387  * FUNCTION:    AcpiOsGetThreadId
1388  *
1389  * PARAMETERS:  None
1390  *
1391  * RETURN:      Id of the running thread
1392  *
1393  * DESCRIPTION: Get the ID of the current (running) thread
1394  *
1395  *****************************************************************************/
1396
1397 ACPI_THREAD_ID
1398 AcpiOsGetThreadId (
1399     void)
1400 {
1401     pthread_t               thread;
1402
1403
1404     thread = pthread_self();
1405     return (ACPI_CAST_PTHREAD_T (thread));
1406 }
1407
1408
1409 /******************************************************************************
1410  *
1411  * FUNCTION:    AcpiOsExecute
1412  *
1413  * PARAMETERS:  Type                - Type of execution
1414  *              Function            - Address of the function to execute
1415  *              Context             - Passed as a parameter to the function
1416  *
1417  * RETURN:      Status.
1418  *
1419  * DESCRIPTION: Execute a new thread
1420  *
1421  *****************************************************************************/
1422
1423 ACPI_STATUS
1424 AcpiOsExecute (
1425     ACPI_EXECUTE_TYPE       Type,
1426     ACPI_OSD_EXEC_CALLBACK  Function,
1427     void                    *Context)
1428 {
1429     pthread_t               thread;
1430     int                     ret;
1431
1432
1433     ret = pthread_create (&thread, NULL, (PTHREAD_CALLBACK) Function, Context);
1434     if (ret)
1435     {
1436         AcpiOsPrintf("Create thread failed");
1437     }
1438     return (0);
1439 }
1440
1441 #endif /* ACPI_SINGLE_THREADED */
1442
1443
1444 /******************************************************************************
1445  *
1446  * FUNCTION:    AcpiOsWaitEventsComplete
1447  *
1448  * PARAMETERS:  None
1449  *
1450  * RETURN:      None
1451  *
1452  * DESCRIPTION: Wait for all asynchronous events to complete. This
1453  *              implementation does nothing.
1454  *
1455  *****************************************************************************/
1456
1457 void
1458 AcpiOsWaitEventsComplete (
1459     void)
1460 {
1461     return;
1462 }