linux/drivers/acpi/acpica/exsystem.c

// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
 *
 * Module Name: exsystem - Interface to OS services
 *
 * Copyright (C) 2000 - 2023, Intel Corp.
 *
 *****************************************************************************/

#include <acpi/acpi.h>
#include "accommon.h"
#include "acinterp.h"

#define _COMPONENT …
ACPI_MODULE_NAME("exsystem")

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_system_wait_semaphore
 *
 * PARAMETERS:  semaphore       - Semaphore to wait on
 *              timeout         - Max time to wait
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Implements a semaphore wait with a check to see if the
 *              semaphore is available immediately. If it is not, the
 *              interpreter is released before waiting.
 *
 ******************************************************************************/
acpi_status acpi_ex_system_wait_semaphore(acpi_semaphore semaphore, u16 timeout)
{ … }

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_system_wait_mutex
 *
 * PARAMETERS:  mutex           - Mutex to wait on
 *              timeout         - Max time to wait
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Implements a mutex wait with a check to see if the
 *              mutex is available immediately. If it is not, the
 *              interpreter is released before waiting.
 *
 ******************************************************************************/

acpi_status acpi_ex_system_wait_mutex(acpi_mutex mutex, u16 timeout)
{ … }

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_system_do_stall
 *
 * PARAMETERS:  how_long_us     - The amount of time to stall,
 *                                in microseconds
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Suspend running thread for specified amount of time.
 *              Note: ACPI specification requires that Stall() does not
 *              relinquish the processor, and delays longer than 100 usec
 *              should use Sleep() instead. We allow stalls up to 255 usec
 *              for compatibility with other interpreters and existing BIOSs.
 *
 ******************************************************************************/

acpi_status acpi_ex_system_do_stall(u32 how_long_us)
{ … }

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_system_do_sleep
 *
 * PARAMETERS:  how_long_ms     - The amount of time to sleep,
 *                                in milliseconds
 *
 * RETURN:      None
 *
 * DESCRIPTION: Sleep the running thread for specified amount of time.
 *
 ******************************************************************************/

acpi_status acpi_ex_system_do_sleep(u64 how_long_ms)
{ … }

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_system_signal_event
 *
 * PARAMETERS:  obj_desc        - The object descriptor for this op
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Provides an access point to perform synchronization operations
 *              within the AML.
 *
 ******************************************************************************/

acpi_status acpi_ex_system_signal_event(union acpi_operand_object * obj_desc)
{ … }

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_system_wait_event
 *
 * PARAMETERS:  time_desc       - The 'time to delay' object descriptor
 *              obj_desc        - The object descriptor for this op
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Provides an access point to perform synchronization operations
 *              within the AML. This operation is a request to wait for an
 *              event.
 *
 ******************************************************************************/

acpi_status
acpi_ex_system_wait_event(union acpi_operand_object *time_desc,
			  union acpi_operand_object *obj_desc)
{ … }

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_system_reset_event
 *
 * PARAMETERS:  obj_desc        - The object descriptor for this op
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Reset an event to a known state.
 *
 ******************************************************************************/

acpi_status acpi_ex_system_reset_event(union acpi_operand_object *obj_desc)
{ … }