309 lines
9.1 KiB
C
309 lines
9.1 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: exsystem - Interface to OS services
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* Copyright (C) 2000 - 2016, Intel Corp.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions, and the following disclaimer,
|
|
* without modification.
|
|
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
|
|
* substantially similar to the "NO WARRANTY" disclaimer below
|
|
* ("Disclaimer") and any redistribution must be conditioned upon
|
|
* including a substantially similar Disclaimer requirement for further
|
|
* binary redistribution.
|
|
* 3. Neither the names of the above-listed copyright holders nor the names
|
|
* of any contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* Alternatively, this software may be distributed under the terms of the
|
|
* GNU General Public License ("GPL") version 2 as published by the Free
|
|
* Software Foundation.
|
|
*
|
|
* NO WARRANTY
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
|
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGES.
|
|
*/
|
|
|
|
#include <acpi/acpi.h>
|
|
#include "accommon.h"
|
|
#include "acinterp.h"
|
|
|
|
#define _COMPONENT ACPI_EXECUTER
|
|
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)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(ex_system_wait_semaphore);
|
|
|
|
status = acpi_os_wait_semaphore(semaphore, 1, ACPI_DO_NOT_WAIT);
|
|
if (ACPI_SUCCESS(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
if (status == AE_TIME) {
|
|
|
|
/* We must wait, so unlock the interpreter */
|
|
|
|
acpi_ex_exit_interpreter();
|
|
status = acpi_os_wait_semaphore(semaphore, 1, timeout);
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
|
|
"*** Thread awake after blocking, %s\n",
|
|
acpi_format_exception(status)));
|
|
|
|
/* Reacquire the interpreter */
|
|
|
|
acpi_ex_enter_interpreter();
|
|
}
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* 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)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(ex_system_wait_mutex);
|
|
|
|
status = acpi_os_acquire_mutex(mutex, ACPI_DO_NOT_WAIT);
|
|
if (ACPI_SUCCESS(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
if (status == AE_TIME) {
|
|
|
|
/* We must wait, so unlock the interpreter */
|
|
|
|
acpi_ex_exit_interpreter();
|
|
status = acpi_os_acquire_mutex(mutex, timeout);
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
|
|
"*** Thread awake after blocking, %s\n",
|
|
acpi_format_exception(status)));
|
|
|
|
/* Reacquire the interpreter */
|
|
|
|
acpi_ex_enter_interpreter();
|
|
}
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ex_system_do_stall
|
|
*
|
|
* PARAMETERS: how_long - 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)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
if (how_long > 255) { /* 255 microseconds */
|
|
/*
|
|
* Longer than 255 usec, this is an error
|
|
*
|
|
* (ACPI specifies 100 usec as max, but this gives some slack in
|
|
* order to support existing BIOSs)
|
|
*/
|
|
ACPI_ERROR((AE_INFO,
|
|
"Time parameter is too large (%u)", how_long));
|
|
status = AE_AML_OPERAND_VALUE;
|
|
} else {
|
|
acpi_os_stall(how_long);
|
|
}
|
|
|
|
return (status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ex_system_do_sleep
|
|
*
|
|
* PARAMETERS: how_long - 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)
|
|
{
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
/* Since this thread will sleep, we must release the interpreter */
|
|
|
|
acpi_ex_exit_interpreter();
|
|
|
|
/*
|
|
* For compatibility with other ACPI implementations and to prevent
|
|
* accidental deep sleeps, limit the sleep time to something reasonable.
|
|
*/
|
|
if (how_long > ACPI_MAX_SLEEP) {
|
|
how_long = ACPI_MAX_SLEEP;
|
|
}
|
|
|
|
acpi_os_sleep(how_long);
|
|
|
|
/* And now we must get the interpreter again */
|
|
|
|
acpi_ex_enter_interpreter();
|
|
return (AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* 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)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
|
|
ACPI_FUNCTION_TRACE(ex_system_signal_event);
|
|
|
|
if (obj_desc) {
|
|
status =
|
|
acpi_os_signal_semaphore(obj_desc->event.os_semaphore, 1);
|
|
}
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* 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)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
|
|
ACPI_FUNCTION_TRACE(ex_system_wait_event);
|
|
|
|
if (obj_desc) {
|
|
status =
|
|
acpi_ex_system_wait_semaphore(obj_desc->event.os_semaphore,
|
|
(u16) time_desc->integer.
|
|
value);
|
|
}
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* 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)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
acpi_semaphore temp_semaphore;
|
|
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
/*
|
|
* We are going to simply delete the existing semaphore and
|
|
* create a new one!
|
|
*/
|
|
status =
|
|
acpi_os_create_semaphore(ACPI_NO_UNIT_LIMIT, 0, &temp_semaphore);
|
|
if (ACPI_SUCCESS(status)) {
|
|
(void)acpi_os_delete_semaphore(obj_desc->event.os_semaphore);
|
|
obj_desc->event.os_semaphore = temp_semaphore;
|
|
}
|
|
|
|
return (status);
|
|
}
|