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 - 2025, 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
os_enter_line_edit_mode(void)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
os_exit_line_edit_mode(void)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
acpi_os_initialize(void)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
acpi_os_terminate(void)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
acpi_os_get_root_pointer(void)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
acpi_os_predefined_override(const struct acpi_predefined_names * init_val,acpi_string * new_val)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
acpi_os_table_override(struct acpi_table_header * existing_table,struct acpi_table_header ** new_table)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
acpi_os_physical_table_override(struct acpi_table_header * existing_table,acpi_physical_address * new_address,u32 * new_table_length)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
acpi_os_enter_sleep(u8 sleep_state,u32 rega_value,u32 regb_value)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
acpi_os_redirect_output(void * destination)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
acpi_os_printf(const char * fmt,...)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
acpi_os_vprintf(const char * fmt,va_list args)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
acpi_os_get_line(char * buffer,u32 buffer_length,u32 * bytes_read)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
acpi_os_map_memory(acpi_physical_address where,acpi_size length)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
acpi_os_unmap_memory(void * where,acpi_size length)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
acpi_os_allocate(acpi_size size)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
acpi_os_allocate_zeroed(acpi_size size)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
acpi_os_free(void * mem)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
acpi_os_create_semaphore(u32 max_units,u32 initial_units,acpi_handle * out_handle)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
acpi_os_delete_semaphore(acpi_handle handle)597 acpi_status acpi_os_delete_semaphore(acpi_handle handle)
598 {
599 return (AE_OK);
600 }
601
acpi_os_wait_semaphore(acpi_handle handle,u32 units,u16 timeout)602 acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
603 {
604 return (AE_OK);
605 }
606
acpi_os_signal_semaphore(acpi_handle handle,u32 units)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
acpi_os_create_semaphore(u32 max_units,u32 initial_units,acpi_handle * out_handle)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
acpi_os_delete_semaphore(acpi_handle handle)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
acpi_os_wait_semaphore(acpi_handle handle,u32 units,u16 msec_timeout)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
acpi_os_signal_semaphore(acpi_handle handle,u32 units)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
acpi_os_create_lock(acpi_spinlock * out_handle)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
acpi_os_delete_lock(acpi_spinlock handle)864 void acpi_os_delete_lock(acpi_spinlock handle)
865 {
866 acpi_os_delete_semaphore(handle);
867 }
868
acpi_os_acquire_lock(acpi_handle handle)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
acpi_os_release_lock(acpi_spinlock handle,acpi_cpu_flags flags)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
acpi_os_install_interrupt_handler(u32 interrupt_number,acpi_osd_handler service_routine,void * context)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
acpi_os_remove_interrupt_handler(u32 interrupt_number,acpi_osd_handler service_routine)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
acpi_os_stall(u32 microseconds)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
acpi_os_sleep(u64 milliseconds)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
acpi_os_get_timer(void)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
acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id,u32 pci_register,u64 * value,u32 width)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
acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id,u32 pci_register,u64 value,u32 width)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
acpi_os_read_port(acpi_io_address address,u32 * value,u32 width)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
acpi_os_write_port(acpi_io_address address,u32 value,u32 width)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
acpi_os_read_memory(acpi_physical_address address,u64 * value,u32 width)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
acpi_os_write_memory(acpi_physical_address address,u64 value,u32 width)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
acpi_os_readable(void * pointer,acpi_size length)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
acpi_os_writable(void * pointer,acpi_size length)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
acpi_os_signal(u32 function,void * info)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
acpi_os_get_thread_id(void)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
acpi_os_execute(acpi_execute_type type,acpi_osd_exec_callback function,void * context)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 */
acpi_os_get_thread_id(void)1284 acpi_thread_id acpi_os_get_thread_id(void)
1285 {
1286 return (1);
1287 }
1288
1289 acpi_status
acpi_os_execute(acpi_execute_type type,acpi_osd_exec_callback function,void * context)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
acpi_os_wait_events_complete(void)1314 void acpi_os_wait_events_complete(void)
1315 {
1316 return;
1317 }
1318