tools/power/acpi/os_specific/service_layers/osunixxf.c

   1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
   2 /******************************************************************************
   3  *
   4  * Module Name: osunixxf - UNIX OSL interfaces
   5  *
   6  * Copyright (C) 2000 - 2020, Intel Corp.
   7  *
   8  *****************************************************************************/
   9
  10 /*
  11  * These interfaces are required in order to compile the ASL compiler and the
  12  * various ACPICA tools under Linux or other Unix-like system.
  13  */
  14 #include <acpi/acpi.h>
  15 #include "accommon.h"
  16 #include "amlcode.h"
  17 #include "acparser.h"
  18 #include "acdebug.h"
  19
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <stdarg.h>
  23 #include <unistd.h>
  24 #include <sys/time.h>
  25 #include <semaphore.h>
  26 #include <pthread.h>
  27 #include <errno.h>
  28
  29 #define _COMPONENT          ACPI_OS_SERVICES
  30 ACPI_MODULE_NAME("osunixxf")
  31
  32 /* Upcalls to acpi_exec */
  33 void
  34 ae_table_override(struct acpi_table_header *existing_table,
  35                   struct acpi_table_header **new_table);
  36
  37 typedef void *(*PTHREAD_CALLBACK) (void *);
  38
  39 /* Buffer used by acpi_os_vprintf */
  40
  41 #define ACPI_VPRINTF_BUFFER_SIZE    512
  42 #define _ASCII_NEWLINE              '\n'
  43
  44 /* Terminal support for acpi_exec only */
  45
  46 #ifdef ACPI_EXEC_APP
  47 #include <termios.h>
  48
  49 struct termios original_term_attributes;
  50 int term_attributes_were_set = 0;
  51
  52 acpi_status acpi_ut_read_line(char *buffer, u32 buffer_length, u32 *bytes_read);
  53
  54 static void os_enter_line_edit_mode(void);
  55
  56 static void os_exit_line_edit_mode(void);
  57
  58 /******************************************************************************
  59  *
  60  * FUNCTION:    os_enter_line_edit_mode, os_exit_line_edit_mode
  61  *
  62  * PARAMETERS:  None
  63  *
  64  * RETURN:      None
  65  *
  66  * DESCRIPTION: Enter/Exit the raw character input mode for the terminal.
  67  *
  68  * Interactive line-editing support for the AML debugger. Used with the
  69  * common/acgetline module.
  70  *
  71  * readline() is not used because of non-portability. It is not available
  72  * on all systems, and if it is, often the package must be manually installed.
  73  *
  74  * Therefore, we use the POSIX tcgetattr/tcsetattr and do the minimal line
  75  * editing that we need in acpi_os_get_line.
  76  *
  77  * If the POSIX tcgetattr/tcsetattr interfaces are unavailable, these
  78  * calls will also work:
  79  *     For os_enter_line_edit_mode: system ("stty cbreak -echo")
  80  *     For os_exit_line_edit_mode: system ("stty cooked echo")
  81  *
  82  *****************************************************************************/
  83
  84 static void os_enter_line_edit_mode(void)
  85 {
  86         struct termios local_term_attributes;
  87
  88         term_attributes_were_set = 0;
  89
  90         /* STDIN must be a terminal */
  91
  92         if (!isatty(STDIN_FILENO)) {
  93                 return;
  94         }
  95
  96         /* Get and keep the original attributes */
  97
  98         if (tcgetattr(STDIN_FILENO, &original_term_attributes)) {
  99                 fprintf(stderr, "Could not get terminal attributes!\n");
 100                 return;
 101         }
 102
 103         /* Set the new attributes to enable raw character input */
 104
 105         memcpy(&local_term_attributes, &original_term_attributes,
 106                sizeof(struct termios));
 107
 108         local_term_attributes.c_lflag &= ~(ICANON | ECHO);
 109         local_term_attributes.c_cc[VMIN] = 1;
 110         local_term_attributes.c_cc[VTIME] = 0;
 111
 112         if (tcsetattr(STDIN_FILENO, TCSANOW, &local_term_attributes)) {
 113                 fprintf(stderr, "Could not set terminal attributes!\n");
 114                 return;
 115         }
 116
 117         term_attributes_were_set = 1;
 118 }
 119
 120 static void os_exit_line_edit_mode(void)
 121 {
 122
 123         if (!term_attributes_were_set) {
 124                 return;
 125         }
 126
 127         /* Set terminal attributes back to the original values */
 128
 129         if (tcsetattr(STDIN_FILENO, TCSANOW, &original_term_attributes)) {
 130                 fprintf(stderr, "Could not restore terminal attributes!\n");
 131         }
 132 }
 133
 134 #else
 135
 136 /* These functions are not needed for other ACPICA utilities */
 137
 138 #define os_enter_line_edit_mode()
 139 #define os_exit_line_edit_mode()
 140 #endif
 141
 142 /******************************************************************************
 143  *
 144  * FUNCTION:    acpi_os_initialize, acpi_os_terminate
 145  *
 146  * PARAMETERS:  None
 147  *
 148  * RETURN:      Status
 149  *
 150  * DESCRIPTION: Initialize and terminate this module.
 151  *
 152  *****************************************************************************/
 153
 154 acpi_status acpi_os_initialize(void)
 155 {
 156         acpi_status status;
 157
 158         acpi_gbl_output_file = stdout;
 159
 160         os_enter_line_edit_mode();
 161
 162         status = acpi_os_create_lock(&acpi_gbl_print_lock);
 163         if (ACPI_FAILURE(status)) {
 164                 return (status);
 165         }
 166
 167         return (AE_OK);
 168 }
 169
 170 acpi_status acpi_os_terminate(void)
 171 {
 172
 173         os_exit_line_edit_mode();
 174         return (AE_OK);
 175 }
 176
 177 #ifndef ACPI_USE_NATIVE_RSDP_POINTER
 178 /******************************************************************************
 179  *
 180  * FUNCTION:    acpi_os_get_root_pointer
 181  *
 182  * PARAMETERS:  None
 183  *
 184  * RETURN:      RSDP physical address
 185  *
 186  * DESCRIPTION: Gets the ACPI root pointer (RSDP)
 187  *
 188  *****************************************************************************/
 189
 190 acpi_physical_address acpi_os_get_root_pointer(void)
 191 {
 192
 193         return (0);
 194 }
 195 #endif
 196
 197 /******************************************************************************
 198  *
 199  * FUNCTION:    acpi_os_predefined_override
 200  *
 201  * PARAMETERS:  init_val            - Initial value of the predefined object
 202  *              new_val             - The new value for the object
 203  *
 204  * RETURN:      Status, pointer to value. Null pointer returned if not
 205  *              overriding.
 206  *
 207  * DESCRIPTION: Allow the OS to override predefined names
 208  *
 209  *****************************************************************************/
 210
 211 acpi_status
 212 acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
 213                             acpi_string *new_val)
 214 {
 215
 216         if (!init_val || !new_val) {
 217                 return (AE_BAD_PARAMETER);
 218         }
 219
 220         *new_val = NULL;
 221         return (AE_OK);
 222 }
 223
 224 /******************************************************************************
 225  *
 226  * FUNCTION:    acpi_os_table_override
 227  *
 228  * PARAMETERS:  existing_table      - Header of current table (probably
 229  *                                    firmware)
 230  *              new_table           - Where an entire new table is returned.
 231  *
 232  * RETURN:      Status, pointer to new table. Null pointer returned if no
 233  *              table is available to override
 234  *
 235  * DESCRIPTION: Return a different version of a table if one is available
 236  *
 237  *****************************************************************************/
 238
 239 acpi_status
 240 acpi_os_table_override(struct acpi_table_header *existing_table,
 241                        struct acpi_table_header **new_table)
 242 {
 243
 244         if (!existing_table || !new_table) {
 245                 return (AE_BAD_PARAMETER);
 246         }
 247
 248         *new_table = NULL;
 249
 250 #ifdef ACPI_EXEC_APP
 251
 252         ae_table_override(existing_table, new_table);
 253         return (AE_OK);
 254 #else
 255
 256         return (AE_NO_ACPI_TABLES);
 257 #endif
 258 }
 259
 260 /******************************************************************************
 261  *
 262  * FUNCTION:    acpi_os_physical_table_override
 263  *
 264  * PARAMETERS:  existing_table      - Header of current table (probably firmware)
 265  *              new_address         - Where new table address is returned
 266  *                                    (Physical address)
 267  *              new_table_length    - Where new table length is returned
 268  *
 269  * RETURN:      Status, address/length of new table. Null pointer returned
 270  *              if no table is available to override.
 271  *
 272  * DESCRIPTION: Returns AE_SUPPORT, function not used in user space.
 273  *
 274  *****************************************************************************/
 275
 276 acpi_status
 277 acpi_os_physical_table_override(struct acpi_table_header *existing_table,
 278                                 acpi_physical_address *new_address,
 279                                 u32 *new_table_length)
 280 {
 281
 282         return (AE_SUPPORT);
 283 }
 284
 285 /******************************************************************************
 286  *
 287  * FUNCTION:    acpi_os_enter_sleep
 288  *
 289  * PARAMETERS:  sleep_state         - Which sleep state to enter
 290  *              rega_value          - Register A value
 291  *              regb_value          - Register B value
 292  *
 293  * RETURN:      Status
 294  *
 295  * DESCRIPTION: A hook before writing sleep registers to enter the sleep
 296  *              state. Return AE_CTRL_TERMINATE to skip further sleep register
 297  *              writes.
 298  *
 299  *****************************************************************************/
 300
 301 acpi_status acpi_os_enter_sleep(u8 sleep_state, u32 rega_value, u32 regb_value)
 302 {
 303
 304         return (AE_OK);
 305 }
 306
 307 /******************************************************************************
 308  *
 309  * FUNCTION:    acpi_os_redirect_output
 310  *
 311  * PARAMETERS:  destination         - An open file handle/pointer
 312  *
 313  * RETURN:      None
 314  *
 315  * DESCRIPTION: Causes redirect of acpi_os_printf and acpi_os_vprintf
 316  *
 317  *****************************************************************************/
 318
 319 void acpi_os_redirect_output(void *destination)
 320 {
 321
 322         acpi_gbl_output_file = destination;
 323 }
 324
 325 /******************************************************************************
 326  *
 327  * FUNCTION:    acpi_os_printf
 328  *
 329  * PARAMETERS:  fmt, ...            - Standard printf format
 330  *
 331  * RETURN:      None
 332  *
 333  * DESCRIPTION: Formatted output. Note: very similar to acpi_os_vprintf
 334  *              (performance), changes should be tracked in both functions.
 335  *
 336  *****************************************************************************/
 337
 338 void ACPI_INTERNAL_VAR_XFACE acpi_os_printf(const char *fmt, ...)
 339 {
 340         va_list args;
 341         u8 flags;
 342
 343         flags = acpi_gbl_db_output_flags;
 344         if (flags & ACPI_DB_REDIRECTABLE_OUTPUT) {
 345
 346                 /* Output is directable to either a file (if open) or the console */
 347
 348                 if (acpi_gbl_debug_file) {
 349
 350                         /* Output file is open, send the output there */
 351
 352                         va_start(args, fmt);
 353                         vfprintf(acpi_gbl_debug_file, fmt, args);
 354                         va_end(args);
 355                 } else {
 356                         /* No redirection, send output to console (once only!) */
 357
 358                         flags |= ACPI_DB_CONSOLE_OUTPUT;
 359                 }
 360         }
 361
 362         if (flags & ACPI_DB_CONSOLE_OUTPUT) {
 363                 va_start(args, fmt);
 364                 vfprintf(acpi_gbl_output_file, fmt, args);
 365                 va_end(args);
 366         }
 367 }
 368
 369 /******************************************************************************
 370  *
 371  * FUNCTION:    acpi_os_vprintf
 372  *
 373  * PARAMETERS:  fmt                 - Standard printf format
 374  *              args                - Argument list
 375  *
 376  * RETURN:      None
 377  *
 378  * DESCRIPTION: Formatted output with argument list pointer. Note: very
 379  *              similar to acpi_os_printf, changes should be tracked in both
 380  *              functions.
 381  *
 382  *****************************************************************************/
 383
 384 void acpi_os_vprintf(const char *fmt, va_list args)
 385 {
 386         u8 flags;
 387         char buffer[ACPI_VPRINTF_BUFFER_SIZE];
 388
 389         /*
 390          * We build the output string in a local buffer because we may be
 391          * outputting the buffer twice. Using vfprintf is problematic because
 392          * some implementations modify the args pointer/structure during
 393          * execution. Thus, we use the local buffer for portability.
 394          *
 395          * Note: Since this module is intended for use by the various ACPICA
 396          * utilities/applications, we can safely declare the buffer on the stack.
 397          * Also, This function is used for relatively small error messages only.
 398          */
 399         vsnprintf(buffer, ACPI_VPRINTF_BUFFER_SIZE, fmt, args);
 400
 401         flags = acpi_gbl_db_output_flags;
 402         if (flags & ACPI_DB_REDIRECTABLE_OUTPUT) {
 403
 404                 /* Output is directable to either a file (if open) or the console */
 405
 406                 if (acpi_gbl_debug_file) {
 407
 408                         /* Output file is open, send the output there */
 409
 410                         fputs(buffer, acpi_gbl_debug_file);
 411                 } else {
 412                         /* No redirection, send output to console (once only!) */
 413
 414                         flags |= ACPI_DB_CONSOLE_OUTPUT;
 415                 }
 416         }
 417
 418         if (flags & ACPI_DB_CONSOLE_OUTPUT) {
 419                 fputs(buffer, acpi_gbl_output_file);
 420         }
 421 }
 422
 423 #ifndef ACPI_EXEC_APP
 424 /******************************************************************************
 425  *
 426  * FUNCTION:    acpi_os_get_line
 427  *
 428  * PARAMETERS:  buffer              - Where to return the command line
 429  *              buffer_length       - Maximum length of Buffer
 430  *              bytes_read          - Where the actual byte count is returned
 431  *
 432  * RETURN:      Status and actual bytes read
 433  *
 434  * DESCRIPTION: Get the next input line from the terminal. NOTE: For the
 435  *              acpi_exec utility, we use the acgetline module instead to
 436  *              provide line-editing and history support.
 437  *
 438  *****************************************************************************/
 439
 440 acpi_status acpi_os_get_line(char *buffer, u32 buffer_length, u32 *bytes_read)
 441 {
 442         int input_char;
 443         u32 end_of_line;
 444
 445         /* Standard acpi_os_get_line for all utilities except acpi_exec */
 446
 447         for (end_of_line = 0;; end_of_line++) {
 448                 if (end_of_line >= buffer_length) {
 449                         return (AE_BUFFER_OVERFLOW);
 450                 }
 451
 452                 if ((input_char = getchar()) == EOF) {
 453                         return (AE_ERROR);
 454                 }
 455
 456                 if (!input_char || input_char == _ASCII_NEWLINE) {
 457                         break;
 458                 }
 459
 460                 buffer[end_of_line] = (char)input_char;
 461         }
 462
 463         /* Null terminate the buffer */
 464
 465         buffer[end_of_line] = 0;
 466
 467         /* Return the number of bytes in the string */
 468
 469         if (bytes_read) {
 470                 *bytes_read = end_of_line;
 471         }
 472
 473         return (AE_OK);
 474 }
 475 #endif
 476
 477 #ifndef ACPI_USE_NATIVE_MEMORY_MAPPING
 478 /******************************************************************************
 479  *
 480  * FUNCTION:    acpi_os_map_memory
 481  *
 482  * PARAMETERS:  where               - Physical address of memory to be mapped
 483  *              length              - How much memory to map
 484  *
 485  * RETURN:      Pointer to mapped memory. Null on error.
 486  *
 487  * DESCRIPTION: Map physical memory into caller's address space
 488  *
 489  *****************************************************************************/
 490
 491 void *acpi_os_map_memory(acpi_physical_address where, acpi_size length)
 492 {
 493
 494         return (ACPI_TO_POINTER((acpi_size)where));
 495 }
 496
 497 /******************************************************************************
 498  *
 499  * FUNCTION:    acpi_os_unmap_memory
 500  *
 501  * PARAMETERS:  where               - Logical address of memory to be unmapped
 502  *              length              - How much memory to unmap
 503  *
 504  * RETURN:      None.
 505  *
 506  * DESCRIPTION: Delete a previously created mapping. Where and Length must
 507  *              correspond to a previous mapping exactly.
 508  *
 509  *****************************************************************************/
 510
 511 void acpi_os_unmap_memory(void *where, acpi_size length)
 512 {
 513
 514         return;
 515 }
 516 #endif
 517
 518 /******************************************************************************
 519  *
 520  * FUNCTION:    acpi_os_allocate
 521  *
 522  * PARAMETERS:  size                - Amount to allocate, in bytes
 523  *
 524  * RETURN:      Pointer to the new allocation. Null on error.
 525  *
 526  * DESCRIPTION: Allocate memory. Algorithm is dependent on the OS.
 527  *
 528  *****************************************************************************/
 529
 530 void *acpi_os_allocate(acpi_size size)
 531 {
 532         void *mem;
 533
 534         mem = (void *)malloc((size_t) size);
 535         return (mem);
 536 }
 537
 538 #ifdef USE_NATIVE_ALLOCATE_ZEROED
 539 /******************************************************************************
 540  *
 541  * FUNCTION:    acpi_os_allocate_zeroed
 542  *
 543  * PARAMETERS:  size                - Amount to allocate, in bytes
 544  *
 545  * RETURN:      Pointer to the new allocation. Null on error.
 546  *
 547  * DESCRIPTION: Allocate and zero memory. Algorithm is dependent on the OS.
 548  *
 549  *****************************************************************************/
 550
 551 void *acpi_os_allocate_zeroed(acpi_size size)
 552 {
 553         void *mem;
 554
 555         mem = (void *)calloc(1, (size_t) size);
 556         return (mem);
 557 }
 558 #endif
 559
 560 /******************************************************************************
 561  *
 562  * FUNCTION:    acpi_os_free
 563  *
 564  * PARAMETERS:  mem                 - Pointer to previously allocated memory
 565  *
 566  * RETURN:      None.
 567  *
 568  * DESCRIPTION: Free memory allocated via acpi_os_allocate
 569  *
 570  *****************************************************************************/
 571
 572 void acpi_os_free(void *mem)
 573 {
 574
 575         free(mem);
 576 }
 577
 578 #ifdef ACPI_SINGLE_THREADED
 579 /******************************************************************************
 580  *
 581  * FUNCTION:    Semaphore stub functions
 582  *
 583  * DESCRIPTION: Stub functions used for single-thread applications that do
 584  *              not require semaphore synchronization. Full implementations
 585  *              of these functions appear after the stubs.
 586  *
 587  *****************************************************************************/
 588
 589 acpi_status
 590 acpi_os_create_semaphore(u32 max_units,
 591                          u32 initial_units, acpi_handle *out_handle)
 592 {
 593         *out_handle = (acpi_handle)1;
 594         return (AE_OK);
 595 }
 596
 597 acpi_status acpi_os_delete_semaphore(acpi_handle handle)
 598 {
 599         return (AE_OK);
 600 }
 601
 602 acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
 603 {
 604         return (AE_OK);
 605 }
 606
 607 acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
 608 {
 609         return (AE_OK);
 610 }
 611
 612 #else
 613 /******************************************************************************
 614  *
 615  * FUNCTION:    acpi_os_create_semaphore
 616  *
 617  * PARAMETERS:  initial_units       - Units to be assigned to the new semaphore
 618  *              out_handle          - Where a handle will be returned
 619  *
 620  * RETURN:      Status
 621  *
 622  * DESCRIPTION: Create an OS semaphore
 623  *
 624  *****************************************************************************/
 625
 626 acpi_status
 627 acpi_os_create_semaphore(u32 max_units,
 628                          u32 initial_units, acpi_handle *out_handle)
 629 {
 630         sem_t *sem;
 631
 632         if (!out_handle) {
 633                 return (AE_BAD_PARAMETER);
 634         }
 635 #ifdef __APPLE__
 636         {
 637                 static int semaphore_count = 0;
 638                 char semaphore_name[32];
 639
 640                 snprintf(semaphore_name, sizeof(semaphore_name), "acpi_sem_%d",
 641                          semaphore_count++);
 642                 printf("%s\n", semaphore_name);
 643                 sem =
 644                     sem_open(semaphore_name, O_EXCL | O_CREAT, 0755,
 645                              initial_units);
 646                 if (!sem) {
 647                         return (AE_NO_MEMORY);
 648                 }
 649                 sem_unlink(semaphore_name);     /* This just deletes the name */
 650         }
 651
 652 #else
 653         sem = acpi_os_allocate(sizeof(sem_t));
 654         if (!sem) {
 655                 return (AE_NO_MEMORY);
 656         }
 657
 658         if (sem_init(sem, 0, initial_units) == -1) {
 659                 acpi_os_free(sem);
 660                 return (AE_BAD_PARAMETER);
 661         }
 662 #endif
 663
 664         *out_handle = (acpi_handle)sem;
 665         return (AE_OK);
 666 }
 667
 668 /******************************************************************************
 669  *
 670  * FUNCTION:    acpi_os_delete_semaphore
 671  *
 672  * PARAMETERS:  handle              - Handle returned by acpi_os_create_semaphore
 673  *
 674  * RETURN:      Status
 675  *
 676  * DESCRIPTION: Delete an OS semaphore
 677  *
 678  *****************************************************************************/
 679
 680 acpi_status acpi_os_delete_semaphore(acpi_handle handle)
 681 {
 682         sem_t *sem = (sem_t *) handle;
 683
 684         if (!sem) {
 685                 return (AE_BAD_PARAMETER);
 686         }
 687 #ifdef __APPLE__
 688         if (sem_close(sem) == -1) {
 689                 return (AE_BAD_PARAMETER);
 690         }
 691 #else
 692         if (sem_destroy(sem) == -1) {
 693                 return (AE_BAD_PARAMETER);
 694         }
 695 #endif
 696
 697         return (AE_OK);
 698 }
 699
 700 /******************************************************************************
 701  *
 702  * FUNCTION:    acpi_os_wait_semaphore
 703  *
 704  * PARAMETERS:  handle              - Handle returned by acpi_os_create_semaphore
 705  *              units               - How many units to wait for
 706  *              msec_timeout        - How long to wait (milliseconds)
 707  *
 708  * RETURN:      Status
 709  *
 710  * DESCRIPTION: Wait for units
 711  *
 712  *****************************************************************************/
 713
 714 acpi_status
 715 acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 msec_timeout)
 716 {
 717         acpi_status status = AE_OK;
 718         sem_t *sem = (sem_t *) handle;
 719         int ret_val;
 720 #ifndef ACPI_USE_ALTERNATE_TIMEOUT
 721         struct timespec time;
 722 #endif
 723
 724         if (!sem) {
 725                 return (AE_BAD_PARAMETER);
 726         }
 727
 728         switch (msec_timeout) {
 729                 /*
 730                  * No Wait:
 731                  * --------
 732                  * A zero timeout value indicates that we shouldn't wait - just
 733                  * acquire the semaphore if available otherwise return AE_TIME
 734                  * (a.k.a. 'would block').
 735                  */
 736         case 0:
 737
 738                 if (sem_trywait(sem) == -1) {
 739                         status = (AE_TIME);
 740                 }
 741                 break;
 742
 743                 /* Wait Indefinitely */
 744
 745         case ACPI_WAIT_FOREVER:
 746
 747                 while (((ret_val = sem_wait(sem)) == -1) && (errno == EINTR)) {
 748                         continue;       /* Restart if interrupted */
 749                 }
 750                 if (ret_val != 0) {
 751                         status = (AE_TIME);
 752                 }
 753                 break;
 754
 755                 /* Wait with msec_timeout */
 756
 757         default:
 758
 759 #ifdef ACPI_USE_ALTERNATE_TIMEOUT
 760                 /*
 761                  * Alternate timeout mechanism for environments where
 762                  * sem_timedwait is not available or does not work properly.
 763                  */
 764                 while (msec_timeout) {
 765                         if (sem_trywait(sem) == 0) {
 766
 767                                 /* Got the semaphore */
 768                                 return (AE_OK);
 769                         }
 770
 771                         if (msec_timeout >= 10) {
 772                                 msec_timeout -= 10;
 773                                 usleep(10 * ACPI_USEC_PER_MSEC);        /* ten milliseconds */
 774                         } else {
 775                                 msec_timeout--;
 776                                 usleep(ACPI_USEC_PER_MSEC);     /* one millisecond */
 777                         }
 778                 }
 779                 status = (AE_TIME);
 780 #else
 781                 /*
 782                  * The interface to sem_timedwait is an absolute time, so we need to
 783                  * get the current time, then add in the millisecond Timeout value.
 784                  */
 785                 if (clock_gettime(CLOCK_REALTIME, &time) == -1) {
 786                         perror("clock_gettime");
 787                         return (AE_TIME);
 788                 }
 789
 790                 time.tv_sec += (msec_timeout / ACPI_MSEC_PER_SEC);
 791                 time.tv_nsec +=
 792                     ((msec_timeout % ACPI_MSEC_PER_SEC) * ACPI_NSEC_PER_MSEC);
 793
 794                 /* Handle nanosecond overflow (field must be less than one second) */
 795
 796                 if (time.tv_nsec >= ACPI_NSEC_PER_SEC) {
 797                         time.tv_sec += (time.tv_nsec / ACPI_NSEC_PER_SEC);
 798                         time.tv_nsec = (time.tv_nsec % ACPI_NSEC_PER_SEC);
 799                 }
 800
 801                 while (((ret_val = sem_timedwait(sem, &time)) == -1)
 802                        && (errno == EINTR)) {
 803                         continue;       /* Restart if interrupted */
 804
 805                 }
 806
 807                 if (ret_val != 0) {
 808                         if (errno != ETIMEDOUT) {
 809                                 perror("sem_timedwait");
 810                         }
 811                         status = (AE_TIME);
 812                 }
 813 #endif
 814                 break;
 815         }
 816
 817         return (status);
 818 }
 819
 820 /******************************************************************************
 821  *
 822  * FUNCTION:    acpi_os_signal_semaphore
 823  *
 824  * PARAMETERS:  handle              - Handle returned by acpi_os_create_semaphore
 825  *              units               - Number of units to send
 826  *
 827  * RETURN:      Status
 828  *
 829  * DESCRIPTION: Send units
 830  *
 831  *****************************************************************************/
 832
 833 acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
 834 {
 835         sem_t *sem = (sem_t *) handle;
 836
 837         if (!sem) {
 838                 return (AE_BAD_PARAMETER);
 839         }
 840
 841         if (sem_post(sem) == -1) {
 842                 return (AE_LIMIT);
 843         }
 844
 845         return (AE_OK);
 846 }
 847
 848 #endif                          /* ACPI_SINGLE_THREADED */
 849
 850 /******************************************************************************
 851  *
 852  * FUNCTION:    Spinlock interfaces
 853  *
 854  * DESCRIPTION: Map these interfaces to semaphore interfaces
 855  *
 856  *****************************************************************************/
 857
 858 acpi_status acpi_os_create_lock(acpi_spinlock * out_handle)
 859 {
 860
 861         return (acpi_os_create_semaphore(1, 1, out_handle));
 862 }
 863
 864 void acpi_os_delete_lock(acpi_spinlock handle)
 865 {
 866         acpi_os_delete_semaphore(handle);
 867 }
 868
 869 acpi_cpu_flags acpi_os_acquire_lock(acpi_handle handle)
 870 {
 871         acpi_os_wait_semaphore(handle, 1, 0xFFFF);
 872         return (0);
 873 }
 874
 875 void acpi_os_release_lock(acpi_spinlock handle, acpi_cpu_flags flags)
 876 {
 877         acpi_os_signal_semaphore(handle, 1);
 878 }
 879
 880 /******************************************************************************
 881  *
 882  * FUNCTION:    acpi_os_install_interrupt_handler
 883  *
 884  * PARAMETERS:  interrupt_number    - Level handler should respond to.
 885  *              isr                 - Address of the ACPI interrupt handler
 886  *              except_ptr          - Where status is returned
 887  *
 888  * RETURN:      Handle to the newly installed handler.
 889  *
 890  * DESCRIPTION: Install an interrupt handler. Used to install the ACPI
 891  *              OS-independent handler.
 892  *
 893  *****************************************************************************/
 894
 895 u32
 896 acpi_os_install_interrupt_handler(u32 interrupt_number,
 897                                   acpi_osd_handler service_routine,
 898                                   void *context)
 899 {
 900
 901         return (AE_OK);
 902 }
 903
 904 /******************************************************************************
 905  *
 906  * FUNCTION:    acpi_os_remove_interrupt_handler
 907  *
 908  * PARAMETERS:  handle              - Returned when handler was installed
 909  *
 910  * RETURN:      Status
 911  *
 912  * DESCRIPTION: Uninstalls an interrupt handler.
 913  *
 914  *****************************************************************************/
 915
 916 acpi_status
 917 acpi_os_remove_interrupt_handler(u32 interrupt_number,
 918                                  acpi_osd_handler service_routine)
 919 {
 920
 921         return (AE_OK);
 922 }
 923
 924 /******************************************************************************
 925  *
 926  * FUNCTION:    acpi_os_stall
 927  *
 928  * PARAMETERS:  microseconds        - Time to sleep
 929  *
 930  * RETURN:      Blocks until sleep is completed.
 931  *
 932  * DESCRIPTION: Sleep at microsecond granularity
 933  *
 934  *****************************************************************************/
 935
 936 void acpi_os_stall(u32 microseconds)
 937 {
 938
 939         if (microseconds) {
 940                 usleep(microseconds);
 941         }
 942 }
 943
 944 /******************************************************************************
 945  *
 946  * FUNCTION:    acpi_os_sleep
 947  *
 948  * PARAMETERS:  milliseconds        - Time to sleep
 949  *
 950  * RETURN:      Blocks until sleep is completed.
 951  *
 952  * DESCRIPTION: Sleep at millisecond granularity
 953  *
 954  *****************************************************************************/
 955
 956 void acpi_os_sleep(u64 milliseconds)
 957 {
 958
 959         /* Sleep for whole seconds */
 960
 961         sleep(milliseconds / ACPI_MSEC_PER_SEC);
 962
 963         /*
 964          * Sleep for remaining microseconds.
 965          * Arg to usleep() is in usecs and must be less than 1,000,000 (1 second).
 966          */
 967         usleep((milliseconds % ACPI_MSEC_PER_SEC) * ACPI_USEC_PER_MSEC);
 968 }
 969
 970 /******************************************************************************
 971  *
 972  * FUNCTION:    acpi_os_get_timer
 973  *
 974  * PARAMETERS:  None
 975  *
 976  * RETURN:      Current time in 100 nanosecond units
 977  *
 978  * DESCRIPTION: Get the current system time
 979  *
 980  *****************************************************************************/
 981
 982 u64 acpi_os_get_timer(void)
 983 {
 984         struct timeval time;
 985
 986         /* This timer has sufficient resolution for user-space application code */
 987
 988         gettimeofday(&time, NULL);
 989
 990         /* (Seconds * 10^7 = 100ns(10^-7)) + (Microseconds(10^-6) * 10^1 = 100ns) */
 991
 992         return (((u64)time.tv_sec * ACPI_100NSEC_PER_SEC) +
 993                 ((u64)time.tv_usec * ACPI_100NSEC_PER_USEC));
 994 }
 995
 996 /******************************************************************************
 997  *
 998  * FUNCTION:    acpi_os_read_pci_configuration
 999  *
1000  * PARAMETERS:  pci_id              - Seg/Bus/Dev
1001  *              pci_register        - Device Register
1002  *              value               - Buffer where value is placed
1003  *              width               - Number of bits
1004  *
1005  * RETURN:      Status
1006  *
1007  * DESCRIPTION: Read data from PCI configuration space
1008  *
1009  *****************************************************************************/
1010
1011 acpi_status
1012 acpi_os_read_pci_configuration(struct acpi_pci_id *pci_id,
1013                                u32 pci_register, u64 *value, u32 width)
1014 {
1015
1016         *value = 0;
1017         return (AE_OK);
1018 }
1019
1020 /******************************************************************************
1021  *
1022  * FUNCTION:    acpi_os_write_pci_configuration
1023  *
1024  * PARAMETERS:  pci_id              - Seg/Bus/Dev
1025  *              pci_register        - Device Register
1026  *              value               - Value to be written
1027  *              width               - Number of bits
1028  *
1029  * RETURN:      Status.
1030  *
1031  * DESCRIPTION: Write data to PCI configuration space
1032  *
1033  *****************************************************************************/
1034
1035 acpi_status
1036 acpi_os_write_pci_configuration(struct acpi_pci_id *pci_id,
1037                                 u32 pci_register, u64 value, u32 width)
1038 {
1039
1040         return (AE_OK);
1041 }
1042
1043 /******************************************************************************
1044  *
1045  * FUNCTION:    acpi_os_read_port
1046  *
1047  * PARAMETERS:  address             - Address of I/O port/register to read
1048  *              value               - Where value is placed
1049  *              width               - Number of bits
1050  *
1051  * RETURN:      Value read from port
1052  *
1053  * DESCRIPTION: Read data from an I/O port or register
1054  *
1055  *****************************************************************************/
1056
1057 acpi_status acpi_os_read_port(acpi_io_address address, u32 *value, u32 width)
1058 {
1059
1060         switch (width) {
1061         case 8:
1062
1063                 *value = 0xFF;
1064                 break;
1065
1066         case 16:
1067
1068                 *value = 0xFFFF;
1069                 break;
1070
1071         case 32:
1072
1073                 *value = 0xFFFFFFFF;
1074                 break;
1075
1076         default:
1077
1078                 return (AE_BAD_PARAMETER);
1079         }
1080
1081         return (AE_OK);
1082 }
1083
1084 /******************************************************************************
1085  *
1086  * FUNCTION:    acpi_os_write_port
1087  *
1088  * PARAMETERS:  address             - Address of I/O port/register to write
1089  *              value               - Value to write
1090  *              width               - Number of bits
1091  *
1092  * RETURN:      None
1093  *
1094  * DESCRIPTION: Write data to an I/O port or register
1095  *
1096  *****************************************************************************/
1097
1098 acpi_status acpi_os_write_port(acpi_io_address address, u32 value, u32 width)
1099 {
1100
1101         return (AE_OK);
1102 }
1103
1104 /******************************************************************************
1105  *
1106  * FUNCTION:    acpi_os_read_memory
1107  *
1108  * PARAMETERS:  address             - Physical Memory Address to read
1109  *              value               - Where value is placed
1110  *              width               - Number of bits (8,16,32, or 64)
1111  *
1112  * RETURN:      Value read from physical memory address. Always returned
1113  *              as a 64-bit integer, regardless of the read width.
1114  *
1115  * DESCRIPTION: Read data from a physical memory address
1116  *
1117  *****************************************************************************/
1118
1119 acpi_status
1120 acpi_os_read_memory(acpi_physical_address address, u64 *value, u32 width)
1121 {
1122
1123         switch (width) {
1124         case 8:
1125         case 16:
1126         case 32:
1127         case 64:
1128
1129                 *value = 0;
1130                 break;
1131
1132         default:
1133
1134                 return (AE_BAD_PARAMETER);
1135         }
1136         return (AE_OK);
1137 }
1138
1139 /******************************************************************************
1140  *
1141  * FUNCTION:    acpi_os_write_memory
1142  *
1143  * PARAMETERS:  address             - Physical Memory Address to write
1144  *              value               - Value to write
1145  *              width               - Number of bits (8,16,32, or 64)
1146  *
1147  * RETURN:      None
1148  *
1149  * DESCRIPTION: Write data to a physical memory address
1150  *
1151  *****************************************************************************/
1152
1153 acpi_status
1154 acpi_os_write_memory(acpi_physical_address address, u64 value, u32 width)
1155 {
1156
1157         return (AE_OK);
1158 }
1159
1160 /******************************************************************************
1161  *
1162  * FUNCTION:    acpi_os_readable
1163  *
1164  * PARAMETERS:  pointer             - Area to be verified
1165  *              length              - Size of area
1166  *
1167  * RETURN:      TRUE if readable for entire length
1168  *
1169  * DESCRIPTION: Verify that a pointer is valid for reading
1170  *
1171  *****************************************************************************/
1172
1173 u8 acpi_os_readable(void *pointer, acpi_size length)
1174 {
1175
1176         return (TRUE);
1177 }
1178
1179 /******************************************************************************
1180  *
1181  * FUNCTION:    acpi_os_writable
1182  *
1183  * PARAMETERS:  pointer             - Area to be verified
1184  *              length              - Size of area
1185  *
1186  * RETURN:      TRUE if writable for entire length
1187  *
1188  * DESCRIPTION: Verify that a pointer is valid for writing
1189  *
1190  *****************************************************************************/
1191
1192 u8 acpi_os_writable(void *pointer, acpi_size length)
1193 {
1194
1195         return (TRUE);
1196 }
1197
1198 /******************************************************************************
1199  *
1200  * FUNCTION:    acpi_os_signal
1201  *
1202  * PARAMETERS:  function            - ACPI A signal function code
1203  *              info                - Pointer to function-dependent structure
1204  *
1205  * RETURN:      Status
1206  *
1207  * DESCRIPTION: Miscellaneous functions. Example implementation only.
1208  *
1209  *****************************************************************************/
1210
1211 acpi_status acpi_os_signal(u32 function, void *info)
1212 {
1213
1214         switch (function) {
1215         case ACPI_SIGNAL_FATAL:
1216
1217                 break;
1218
1219         case ACPI_SIGNAL_BREAKPOINT:
1220
1221                 break;
1222
1223         default:
1224
1225                 break;
1226         }
1227
1228         return (AE_OK);
1229 }
1230
1231 /* Optional multi-thread support */
1232
1233 #ifndef ACPI_SINGLE_THREADED
1234 /******************************************************************************
1235  *
1236  * FUNCTION:    acpi_os_get_thread_id
1237  *
1238  * PARAMETERS:  None
1239  *
1240  * RETURN:      Id of the running thread
1241  *
1242  * DESCRIPTION: Get the ID of the current (running) thread
1243  *
1244  *****************************************************************************/
1245
1246 acpi_thread_id acpi_os_get_thread_id(void)
1247 {
1248         pthread_t thread;
1249
1250         thread = pthread_self();
1251         return (ACPI_CAST_PTHREAD_T(thread));
1252 }
1253
1254 /******************************************************************************
1255  *
1256  * FUNCTION:    acpi_os_execute
1257  *
1258  * PARAMETERS:  type                - Type of execution
1259  *              function            - Address of the function to execute
1260  *              context             - Passed as a parameter to the function
1261  *
1262  * RETURN:      Status.
1263  *
1264  * DESCRIPTION: Execute a new thread
1265  *
1266  *****************************************************************************/
1267
1268 acpi_status
1269 acpi_os_execute(acpi_execute_type type,
1270                 acpi_osd_exec_callback function, void *context)
1271 {
1272         pthread_t thread;
1273         int ret;
1274
1275         ret =
1276             pthread_create(&thread, NULL, (PTHREAD_CALLBACK) function, context);
1277         if (ret) {
1278                 acpi_os_printf("Create thread failed");
1279         }
1280         return (0);
1281 }
1282
1283 #else                           /* ACPI_SINGLE_THREADED */
1284 acpi_thread_id acpi_os_get_thread_id(void)
1285 {
1286         return (1);
1287 }
1288
1289 acpi_status
1290 acpi_os_execute(acpi_execute_type type,
1291                 acpi_osd_exec_callback function, void *context)
1292 {
1293
1294         function(context);
1295
1296         return (AE_OK);
1297 }
1298
1299 #endif                          /* ACPI_SINGLE_THREADED */
1300
1301 /******************************************************************************
1302  *
1303  * FUNCTION:    acpi_os_wait_events_complete
1304  *
1305  * PARAMETERS:  None
1306  *
1307  * RETURN:      None
1308  *
1309  * DESCRIPTION: Wait for all asynchronous events to complete. This
1310  *              implementation does nothing.
1311  *
1312  *****************************************************************************/
1313
1314 void acpi_os_wait_events_complete(void)
1315 {
1316         return;
1317 }