1 /******************************************************************************
3 * Module Name: osunixxf - UNIX OSL interfaces
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2014, Intel Corp.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
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.
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.
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.
45 * These interfaces are required in order to compile the ASL compiler and the
46 * various ACPICA tools under Linux or other Unix-like system.
48 #include <acpi/acpi.h>
59 #include <semaphore.h>
63 #define _COMPONENT ACPI_OS_SERVICES
64 ACPI_MODULE_NAME("osunixxf")
66 u8 acpi_gbl_debug_timeout
= FALSE
;
68 /* Upcalls to acpi_exec */
71 ae_table_override(struct acpi_table_header
*existing_table
,
72 struct acpi_table_header
**new_table
);
74 typedef void *(*PTHREAD_CALLBACK
) (void *);
76 /* Buffer used by acpi_os_vprintf */
78 #define ACPI_VPRINTF_BUFFER_SIZE 512
79 #define _ASCII_NEWLINE '\n'
81 /* Terminal support for acpi_exec only */
86 struct termios original_term_attributes
;
87 int term_attributes_were_set
= 0;
89 acpi_status
acpi_ut_read_line(char *buffer
, u32 buffer_length
, u32
*bytes_read
);
91 static void os_enter_line_edit_mode(void);
93 static void os_exit_line_edit_mode(void);
95 /******************************************************************************
97 * FUNCTION: os_enter_line_edit_mode, os_exit_line_edit_mode
103 * DESCRIPTION: Enter/Exit the raw character input mode for the terminal.
105 * Interactive line-editing support for the AML debugger. Used with the
106 * common/acgetline module.
108 * readline() is not used because of non-portability. It is not available
109 * on all systems, and if it is, often the package must be manually installed.
111 * Therefore, we use the POSIX tcgetattr/tcsetattr and do the minimal line
112 * editing that we need in acpi_os_get_line.
114 * If the POSIX tcgetattr/tcsetattr interfaces are unavailable, these
115 * calls will also work:
116 * For os_enter_line_edit_mode: system ("stty cbreak -echo")
117 * For os_exit_line_edit_mode: system ("stty cooked echo")
119 *****************************************************************************/
121 static void os_enter_line_edit_mode(void)
123 struct termios local_term_attributes
;
125 /* Get and keep the original attributes */
127 if (tcgetattr(STDIN_FILENO
, &original_term_attributes
)) {
128 fprintf(stderr
, "Could not get terminal attributes!\n");
132 /* Set the new attributes to enable raw character input */
134 memcpy(&local_term_attributes
, &original_term_attributes
,
135 sizeof(struct termios
));
137 local_term_attributes
.c_lflag
&= ~(ICANON
| ECHO
);
138 local_term_attributes
.c_cc
[VMIN
] = 1;
139 local_term_attributes
.c_cc
[VTIME
] = 0;
141 if (tcsetattr(STDIN_FILENO
, TCSANOW
, &local_term_attributes
)) {
142 fprintf(stderr
, "Could not set terminal attributes!\n");
146 term_attributes_were_set
= 1;
149 static void os_exit_line_edit_mode(void)
152 if (!term_attributes_were_set
) {
156 /* Set terminal attributes back to the original values */
158 if (tcsetattr(STDIN_FILENO
, TCSANOW
, &original_term_attributes
)) {
159 fprintf(stderr
, "Could not restore terminal attributes!\n");
165 /* These functions are not needed for other ACPICA utilities */
167 #define os_enter_line_edit_mode()
168 #define os_exit_line_edit_mode()
171 /******************************************************************************
173 * FUNCTION: acpi_os_initialize, acpi_os_terminate
179 * DESCRIPTION: Initialize and terminate this module.
181 *****************************************************************************/
183 acpi_status
acpi_os_initialize(void)
187 acpi_gbl_output_file
= stdout
;
189 os_enter_line_edit_mode();
191 status
= acpi_os_create_lock(&acpi_gbl_print_lock
);
192 if (ACPI_FAILURE(status
)) {
199 acpi_status
acpi_os_terminate(void)
202 os_exit_line_edit_mode();
206 #ifndef ACPI_USE_NATIVE_RSDP_POINTER
207 /******************************************************************************
209 * FUNCTION: acpi_os_get_root_pointer
213 * RETURN: RSDP physical address
215 * DESCRIPTION: Gets the ACPI root pointer (RSDP)
217 *****************************************************************************/
219 acpi_physical_address
acpi_os_get_root_pointer(void)
226 /******************************************************************************
228 * FUNCTION: acpi_os_predefined_override
230 * PARAMETERS: init_val - Initial value of the predefined object
231 * new_val - The new value for the object
233 * RETURN: Status, pointer to value. Null pointer returned if not
236 * DESCRIPTION: Allow the OS to override predefined names
238 *****************************************************************************/
241 acpi_os_predefined_override(const struct acpi_predefined_names
* init_val
,
242 acpi_string
* new_val
)
245 if (!init_val
|| !new_val
) {
246 return (AE_BAD_PARAMETER
);
253 /******************************************************************************
255 * FUNCTION: acpi_os_table_override
257 * PARAMETERS: existing_table - Header of current table (probably
259 * new_table - Where an entire new table is returned.
261 * RETURN: Status, pointer to new table. Null pointer returned if no
262 * table is available to override
264 * DESCRIPTION: Return a different version of a table if one is available
266 *****************************************************************************/
269 acpi_os_table_override(struct acpi_table_header
* existing_table
,
270 struct acpi_table_header
** new_table
)
273 if (!existing_table
|| !new_table
) {
274 return (AE_BAD_PARAMETER
);
281 ae_table_override(existing_table
, new_table
);
285 return (AE_NO_ACPI_TABLES
);
289 /******************************************************************************
291 * FUNCTION: acpi_os_physical_table_override
293 * PARAMETERS: existing_table - Header of current table (probably firmware)
294 * new_address - Where new table address is returned
296 * new_table_length - Where new table length is returned
298 * RETURN: Status, address/length of new table. Null pointer returned
299 * if no table is available to override.
301 * DESCRIPTION: Returns AE_SUPPORT, function not used in user space.
303 *****************************************************************************/
306 acpi_os_physical_table_override(struct acpi_table_header
* existing_table
,
307 acpi_physical_address
* new_address
,
308 u32
*new_table_length
)
314 /******************************************************************************
316 * FUNCTION: acpi_os_redirect_output
318 * PARAMETERS: destination - An open file handle/pointer
322 * DESCRIPTION: Causes redirect of acpi_os_printf and acpi_os_vprintf
324 *****************************************************************************/
326 void acpi_os_redirect_output(void *destination
)
329 acpi_gbl_output_file
= destination
;
332 /******************************************************************************
334 * FUNCTION: acpi_os_printf
336 * PARAMETERS: fmt, ... - Standard printf format
340 * DESCRIPTION: Formatted output. Note: very similar to acpi_os_vprintf
341 * (performance), changes should be tracked in both functions.
343 *****************************************************************************/
345 void ACPI_INTERNAL_VAR_XFACE
acpi_os_printf(const char *fmt
, ...)
350 flags
= acpi_gbl_db_output_flags
;
351 if (flags
& ACPI_DB_REDIRECTABLE_OUTPUT
) {
353 /* Output is directable to either a file (if open) or the console */
355 if (acpi_gbl_debug_file
) {
357 /* Output file is open, send the output there */
360 vfprintf(acpi_gbl_debug_file
, fmt
, args
);
363 /* No redirection, send output to console (once only!) */
365 flags
|= ACPI_DB_CONSOLE_OUTPUT
;
369 if (flags
& ACPI_DB_CONSOLE_OUTPUT
) {
371 vfprintf(acpi_gbl_output_file
, fmt
, args
);
376 /******************************************************************************
378 * FUNCTION: acpi_os_vprintf
380 * PARAMETERS: fmt - Standard printf format
381 * args - Argument list
385 * DESCRIPTION: Formatted output with argument list pointer. Note: very
386 * similar to acpi_os_printf, changes should be tracked in both
389 *****************************************************************************/
391 void acpi_os_vprintf(const char *fmt
, va_list args
)
394 char buffer
[ACPI_VPRINTF_BUFFER_SIZE
];
397 * We build the output string in a local buffer because we may be
398 * outputting the buffer twice. Using vfprintf is problematic because
399 * some implementations modify the args pointer/structure during
400 * execution. Thus, we use the local buffer for portability.
402 * Note: Since this module is intended for use by the various ACPICA
403 * utilities/applications, we can safely declare the buffer on the stack.
404 * Also, This function is used for relatively small error messages only.
406 vsnprintf(buffer
, ACPI_VPRINTF_BUFFER_SIZE
, fmt
, args
);
408 flags
= acpi_gbl_db_output_flags
;
409 if (flags
& ACPI_DB_REDIRECTABLE_OUTPUT
) {
411 /* Output is directable to either a file (if open) or the console */
413 if (acpi_gbl_debug_file
) {
415 /* Output file is open, send the output there */
417 fputs(buffer
, acpi_gbl_debug_file
);
419 /* No redirection, send output to console (once only!) */
421 flags
|= ACPI_DB_CONSOLE_OUTPUT
;
425 if (flags
& ACPI_DB_CONSOLE_OUTPUT
) {
426 fputs(buffer
, acpi_gbl_output_file
);
430 #ifndef ACPI_EXEC_APP
431 /******************************************************************************
433 * FUNCTION: acpi_os_get_line
435 * PARAMETERS: buffer - Where to return the command line
436 * buffer_length - Maximum length of Buffer
437 * bytes_read - Where the actual byte count is returned
439 * RETURN: Status and actual bytes read
441 * DESCRIPTION: Get the next input line from the terminal. NOTE: For the
442 * acpi_exec utility, we use the acgetline module instead to
443 * provide line-editing and history support.
445 *****************************************************************************/
447 acpi_status
acpi_os_get_line(char *buffer
, u32 buffer_length
, u32
*bytes_read
)
452 /* Standard acpi_os_get_line for all utilities except acpi_exec */
454 for (end_of_line
= 0;; end_of_line
++) {
455 if (end_of_line
>= buffer_length
) {
456 return (AE_BUFFER_OVERFLOW
);
459 if ((input_char
= getchar()) == EOF
) {
463 if (!input_char
|| input_char
== _ASCII_NEWLINE
) {
467 buffer
[end_of_line
] = (char)input_char
;
470 /* Null terminate the buffer */
472 buffer
[end_of_line
] = 0;
474 /* Return the number of bytes in the string */
477 *bytes_read
= end_of_line
;
484 #ifndef ACPI_USE_NATIVE_MEMORY_MAPPING
485 /******************************************************************************
487 * FUNCTION: acpi_os_map_memory
489 * PARAMETERS: where - Physical address of memory to be mapped
490 * length - How much memory to map
492 * RETURN: Pointer to mapped memory. Null on error.
494 * DESCRIPTION: Map physical memory into caller's address space
496 *****************************************************************************/
498 void *acpi_os_map_memory(acpi_physical_address where
, acpi_size length
)
501 return (ACPI_TO_POINTER((acpi_size
) where
));
504 /******************************************************************************
506 * FUNCTION: acpi_os_unmap_memory
508 * PARAMETERS: where - Logical address of memory to be unmapped
509 * length - How much memory to unmap
513 * DESCRIPTION: Delete a previously created mapping. Where and Length must
514 * correspond to a previous mapping exactly.
516 *****************************************************************************/
518 void acpi_os_unmap_memory(void *where
, acpi_size length
)
525 /******************************************************************************
527 * FUNCTION: acpi_os_allocate
529 * PARAMETERS: size - Amount to allocate, in bytes
531 * RETURN: Pointer to the new allocation. Null on error.
533 * DESCRIPTION: Allocate memory. Algorithm is dependent on the OS.
535 *****************************************************************************/
537 void *acpi_os_allocate(acpi_size size
)
541 mem
= (void *)malloc((size_t) size
);
545 #ifdef USE_NATIVE_ALLOCATE_ZEROED
546 /******************************************************************************
548 * FUNCTION: acpi_os_allocate_zeroed
550 * PARAMETERS: size - Amount to allocate, in bytes
552 * RETURN: Pointer to the new allocation. Null on error.
554 * DESCRIPTION: Allocate and zero memory. Algorithm is dependent on the OS.
556 *****************************************************************************/
558 void *acpi_os_allocate_zeroed(acpi_size size
)
562 mem
= (void *)calloc(1, (size_t) size
);
567 /******************************************************************************
569 * FUNCTION: acpi_os_free
571 * PARAMETERS: mem - Pointer to previously allocated memory
575 * DESCRIPTION: Free memory allocated via acpi_os_allocate
577 *****************************************************************************/
579 void acpi_os_free(void *mem
)
585 #ifdef ACPI_SINGLE_THREADED
586 /******************************************************************************
588 * FUNCTION: Semaphore stub functions
590 * DESCRIPTION: Stub functions used for single-thread applications that do
591 * not require semaphore synchronization. Full implementations
592 * of these functions appear after the stubs.
594 *****************************************************************************/
597 acpi_os_create_semaphore(u32 max_units
,
598 u32 initial_units
, acpi_handle
* out_handle
)
600 *out_handle
= (acpi_handle
) 1;
604 acpi_status
acpi_os_delete_semaphore(acpi_handle handle
)
609 acpi_status
acpi_os_wait_semaphore(acpi_handle handle
, u32 units
, u16 timeout
)
614 acpi_status
acpi_os_signal_semaphore(acpi_handle handle
, u32 units
)
620 /******************************************************************************
622 * FUNCTION: acpi_os_create_semaphore
624 * PARAMETERS: initial_units - Units to be assigned to the new semaphore
625 * out_handle - Where a handle will be returned
629 * DESCRIPTION: Create an OS semaphore
631 *****************************************************************************/
634 acpi_os_create_semaphore(u32 max_units
,
635 u32 initial_units
, acpi_handle
* out_handle
)
640 return (AE_BAD_PARAMETER
);
644 char *semaphore_name
= tmpnam(NULL
);
647 sem_open(semaphore_name
, O_EXCL
| O_CREAT
, 0755,
650 return (AE_NO_MEMORY
);
652 sem_unlink(semaphore_name
); /* This just deletes the name */
656 sem
= acpi_os_allocate(sizeof(sem_t
));
658 return (AE_NO_MEMORY
);
661 if (sem_init(sem
, 0, initial_units
) == -1) {
663 return (AE_BAD_PARAMETER
);
667 *out_handle
= (acpi_handle
) sem
;
671 /******************************************************************************
673 * FUNCTION: acpi_os_delete_semaphore
675 * PARAMETERS: handle - Handle returned by acpi_os_create_semaphore
679 * DESCRIPTION: Delete an OS semaphore
681 *****************************************************************************/
683 acpi_status
acpi_os_delete_semaphore(acpi_handle handle
)
685 sem_t
*sem
= (sem_t
*) handle
;
688 return (AE_BAD_PARAMETER
);
691 if (sem_destroy(sem
) == -1) {
692 return (AE_BAD_PARAMETER
);
698 /******************************************************************************
700 * FUNCTION: acpi_os_wait_semaphore
702 * PARAMETERS: handle - Handle returned by acpi_os_create_semaphore
703 * units - How many units to wait for
704 * msec_timeout - How long to wait (milliseconds)
708 * DESCRIPTION: Wait for units
710 *****************************************************************************/
713 acpi_os_wait_semaphore(acpi_handle handle
, u32 units
, u16 msec_timeout
)
715 acpi_status status
= AE_OK
;
716 sem_t
*sem
= (sem_t
*) handle
;
717 #ifndef ACPI_USE_ALTERNATE_TIMEOUT
718 struct timespec time
;
723 return (AE_BAD_PARAMETER
);
726 switch (msec_timeout
) {
730 * A zero timeout value indicates that we shouldn't wait - just
731 * acquire the semaphore if available otherwise return AE_TIME
732 * (a.k.a. 'would block').
736 if (sem_trywait(sem
) == -1) {
741 /* Wait Indefinitely */
743 case ACPI_WAIT_FOREVER
:
750 /* Wait with msec_timeout */
754 #ifdef ACPI_USE_ALTERNATE_TIMEOUT
756 * Alternate timeout mechanism for environments where
757 * sem_timedwait is not available or does not work properly.
759 while (msec_timeout
) {
760 if (sem_trywait(sem
) == 0) {
762 /* Got the semaphore */
766 if (msec_timeout
>= 10) {
768 usleep(10 * ACPI_USEC_PER_MSEC
); /* ten milliseconds */
771 usleep(ACPI_USEC_PER_MSEC
); /* one millisecond */
777 * The interface to sem_timedwait is an absolute time, so we need to
778 * get the current time, then add in the millisecond Timeout value.
780 if (clock_gettime(CLOCK_REALTIME
, &time
) == -1) {
781 perror("clock_gettime");
785 time
.tv_sec
+= (msec_timeout
/ ACPI_MSEC_PER_SEC
);
787 ((msec_timeout
% ACPI_MSEC_PER_SEC
) * ACPI_NSEC_PER_MSEC
);
789 /* Handle nanosecond overflow (field must be less than one second) */
791 if (time
.tv_nsec
>= ACPI_NSEC_PER_SEC
) {
792 time
.tv_sec
+= (time
.tv_nsec
/ ACPI_NSEC_PER_SEC
);
793 time
.tv_nsec
= (time
.tv_nsec
% ACPI_NSEC_PER_SEC
);
796 while (((ret_val
= sem_timedwait(sem
, &time
)) == -1)
797 && (errno
== EINTR
)) {
802 if (errno
!= ETIMEDOUT
) {
803 perror("sem_timedwait");
814 /******************************************************************************
816 * FUNCTION: acpi_os_signal_semaphore
818 * PARAMETERS: handle - Handle returned by acpi_os_create_semaphore
819 * units - Number of units to send
823 * DESCRIPTION: Send units
825 *****************************************************************************/
827 acpi_status
acpi_os_signal_semaphore(acpi_handle handle
, u32 units
)
829 sem_t
*sem
= (sem_t
*) handle
;
832 return (AE_BAD_PARAMETER
);
835 if (sem_post(sem
) == -1) {
842 #endif /* ACPI_SINGLE_THREADED */
844 /******************************************************************************
846 * FUNCTION: Spinlock interfaces
848 * DESCRIPTION: Map these interfaces to semaphore interfaces
850 *****************************************************************************/
852 acpi_status
acpi_os_create_lock(acpi_spinlock
* out_handle
)
855 return (acpi_os_create_semaphore(1, 1, out_handle
));
858 void acpi_os_delete_lock(acpi_spinlock handle
)
860 acpi_os_delete_semaphore(handle
);
863 acpi_cpu_flags
acpi_os_acquire_lock(acpi_handle handle
)
865 acpi_os_wait_semaphore(handle
, 1, 0xFFFF);
869 void acpi_os_release_lock(acpi_spinlock handle
, acpi_cpu_flags flags
)
871 acpi_os_signal_semaphore(handle
, 1);
874 /******************************************************************************
876 * FUNCTION: acpi_os_install_interrupt_handler
878 * PARAMETERS: interrupt_number - Level handler should respond to.
879 * isr - Address of the ACPI interrupt handler
880 * except_ptr - Where status is returned
882 * RETURN: Handle to the newly installed handler.
884 * DESCRIPTION: Install an interrupt handler. Used to install the ACPI
885 * OS-independent handler.
887 *****************************************************************************/
890 acpi_os_install_interrupt_handler(u32 interrupt_number
,
891 acpi_osd_handler service_routine
,
898 /******************************************************************************
900 * FUNCTION: acpi_os_remove_interrupt_handler
902 * PARAMETERS: handle - Returned when handler was installed
906 * DESCRIPTION: Uninstalls an interrupt handler.
908 *****************************************************************************/
911 acpi_os_remove_interrupt_handler(u32 interrupt_number
,
912 acpi_osd_handler service_routine
)
918 /******************************************************************************
920 * FUNCTION: acpi_os_stall
922 * PARAMETERS: microseconds - Time to sleep
924 * RETURN: Blocks until sleep is completed.
926 * DESCRIPTION: Sleep at microsecond granularity
928 *****************************************************************************/
930 void acpi_os_stall(u32 microseconds
)
934 usleep(microseconds
);
938 /******************************************************************************
940 * FUNCTION: acpi_os_sleep
942 * PARAMETERS: milliseconds - Time to sleep
944 * RETURN: Blocks until sleep is completed.
946 * DESCRIPTION: Sleep at millisecond granularity
948 *****************************************************************************/
950 void acpi_os_sleep(u64 milliseconds
)
953 /* Sleep for whole seconds */
955 sleep(milliseconds
/ ACPI_MSEC_PER_SEC
);
958 * Sleep for remaining microseconds.
959 * Arg to usleep() is in usecs and must be less than 1,000,000 (1 second).
961 usleep((milliseconds
% ACPI_MSEC_PER_SEC
) * ACPI_USEC_PER_MSEC
);
964 /******************************************************************************
966 * FUNCTION: acpi_os_get_timer
970 * RETURN: Current time in 100 nanosecond units
972 * DESCRIPTION: Get the current system time
974 *****************************************************************************/
976 u64
acpi_os_get_timer(void)
980 /* This timer has sufficient resolution for user-space application code */
982 gettimeofday(&time
, NULL
);
984 /* (Seconds * 10^7 = 100ns(10^-7)) + (Microseconds(10^-6) * 10^1 = 100ns) */
986 return (((u64
)time
.tv_sec
* ACPI_100NSEC_PER_SEC
) +
987 ((u64
)time
.tv_usec
* ACPI_100NSEC_PER_USEC
));
990 /******************************************************************************
992 * FUNCTION: acpi_os_read_pci_configuration
994 * PARAMETERS: pci_id - Seg/Bus/Dev
995 * pci_register - Device Register
996 * value - Buffer where value is placed
997 * width - Number of bits
1001 * DESCRIPTION: Read data from PCI configuration space
1003 *****************************************************************************/
1006 acpi_os_read_pci_configuration(struct acpi_pci_id
*pci_id
,
1007 u32 pci_register
, u64
*value
, u32 width
)
1014 /******************************************************************************
1016 * FUNCTION: acpi_os_write_pci_configuration
1018 * PARAMETERS: pci_id - Seg/Bus/Dev
1019 * pci_register - Device Register
1020 * value - Value to be written
1021 * width - Number of bits
1025 * DESCRIPTION: Write data to PCI configuration space
1027 *****************************************************************************/
1030 acpi_os_write_pci_configuration(struct acpi_pci_id
* pci_id
,
1031 u32 pci_register
, u64 value
, u32 width
)
1037 /******************************************************************************
1039 * FUNCTION: acpi_os_read_port
1041 * PARAMETERS: address - Address of I/O port/register to read
1042 * value - Where value is placed
1043 * width - Number of bits
1045 * RETURN: Value read from port
1047 * DESCRIPTION: Read data from an I/O port or register
1049 *****************************************************************************/
1051 acpi_status
acpi_os_read_port(acpi_io_address address
, u32
*value
, u32 width
)
1067 *value
= 0xFFFFFFFF;
1072 return (AE_BAD_PARAMETER
);
1078 /******************************************************************************
1080 * FUNCTION: acpi_os_write_port
1082 * PARAMETERS: address - Address of I/O port/register to write
1083 * value - Value to write
1084 * width - Number of bits
1088 * DESCRIPTION: Write data to an I/O port or register
1090 *****************************************************************************/
1092 acpi_status
acpi_os_write_port(acpi_io_address address
, u32 value
, u32 width
)
1098 /******************************************************************************
1100 * FUNCTION: acpi_os_read_memory
1102 * PARAMETERS: address - Physical Memory Address to read
1103 * value - Where value is placed
1104 * width - Number of bits (8,16,32, or 64)
1106 * RETURN: Value read from physical memory address. Always returned
1107 * as a 64-bit integer, regardless of the read width.
1109 * DESCRIPTION: Read data from a physical memory address
1111 *****************************************************************************/
1114 acpi_os_read_memory(acpi_physical_address address
, u64
*value
, u32 width
)
1128 return (AE_BAD_PARAMETER
);
1133 /******************************************************************************
1135 * FUNCTION: acpi_os_write_memory
1137 * PARAMETERS: address - Physical Memory Address to write
1138 * value - Value to write
1139 * width - Number of bits (8,16,32, or 64)
1143 * DESCRIPTION: Write data to a physical memory address
1145 *****************************************************************************/
1148 acpi_os_write_memory(acpi_physical_address address
, u64 value
, u32 width
)
1154 /******************************************************************************
1156 * FUNCTION: acpi_os_readable
1158 * PARAMETERS: pointer - Area to be verified
1159 * length - Size of area
1161 * RETURN: TRUE if readable for entire length
1163 * DESCRIPTION: Verify that a pointer is valid for reading
1165 *****************************************************************************/
1167 u8
acpi_os_readable(void *pointer
, acpi_size length
)
1173 /******************************************************************************
1175 * FUNCTION: acpi_os_writable
1177 * PARAMETERS: pointer - Area to be verified
1178 * length - Size of area
1180 * RETURN: TRUE if writable for entire length
1182 * DESCRIPTION: Verify that a pointer is valid for writing
1184 *****************************************************************************/
1186 u8
acpi_os_writable(void *pointer
, acpi_size length
)
1192 /******************************************************************************
1194 * FUNCTION: acpi_os_signal
1196 * PARAMETERS: function - ACPI A signal function code
1197 * info - Pointer to function-dependent structure
1201 * DESCRIPTION: Miscellaneous functions. Example implementation only.
1203 *****************************************************************************/
1205 acpi_status
acpi_os_signal(u32 function
, void *info
)
1209 case ACPI_SIGNAL_FATAL
:
1213 case ACPI_SIGNAL_BREAKPOINT
:
1225 /* Optional multi-thread support */
1227 #ifndef ACPI_SINGLE_THREADED
1228 /******************************************************************************
1230 * FUNCTION: acpi_os_get_thread_id
1234 * RETURN: Id of the running thread
1236 * DESCRIPTION: Get the ID of the current (running) thread
1238 *****************************************************************************/
1240 acpi_thread_id
acpi_os_get_thread_id(void)
1244 thread
= pthread_self();
1245 return (ACPI_CAST_PTHREAD_T(thread
));
1248 /******************************************************************************
1250 * FUNCTION: acpi_os_execute
1252 * PARAMETERS: type - Type of execution
1253 * function - Address of the function to execute
1254 * context - Passed as a parameter to the function
1258 * DESCRIPTION: Execute a new thread
1260 *****************************************************************************/
1263 acpi_os_execute(acpi_execute_type type
,
1264 acpi_osd_exec_callback function
, void *context
)
1270 pthread_create(&thread
, NULL
, (PTHREAD_CALLBACK
) function
, context
);
1272 acpi_os_printf("Create thread failed");
1277 #else /* ACPI_SINGLE_THREADED */
1278 acpi_thread_id
acpi_os_get_thread_id(void)
1284 acpi_os_execute(acpi_execute_type type
,
1285 acpi_osd_exec_callback function
, void *context
)
1293 #endif /* ACPI_SINGLE_THREADED */
1295 /******************************************************************************
1297 * FUNCTION: acpi_os_wait_events_complete
1303 * DESCRIPTION: Wait for all asynchronous events to complete. This
1304 * implementation does nothing.
1306 *****************************************************************************/
1308 void acpi_os_wait_events_complete(void)