428 lines
14 KiB
C
428 lines
14 KiB
C
|
|
/******************************************************************************
|
|
*
|
|
* Module Name: exsystem - Interface to OS services
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/******************************************************************************
|
|
*
|
|
* 1. Copyright Notice
|
|
*
|
|
* Some or all of this work - Copyright (c) 1999 - 2010, Intel Corp.
|
|
* All rights reserved.
|
|
*
|
|
* 2. License
|
|
*
|
|
* 2.1. This is your license from Intel Corp. under its intellectual property
|
|
* rights. You may have additional license terms from the party that provided
|
|
* you this software, covering your right to use that party's intellectual
|
|
* property rights.
|
|
*
|
|
* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
|
|
* copy of the source code appearing in this file ("Covered Code") an
|
|
* irrevocable, perpetual, worldwide license under Intel's copyrights in the
|
|
* base code distributed originally by Intel ("Original Intel Code") to copy,
|
|
* make derivatives, distribute, use and display any portion of the Covered
|
|
* Code in any form, with the right to sublicense such rights; and
|
|
*
|
|
* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
|
|
* license (with the right to sublicense), under only those claims of Intel
|
|
* patents that are infringed by the Original Intel Code, to make, use, sell,
|
|
* offer to sell, and import the Covered Code and derivative works thereof
|
|
* solely to the minimum extent necessary to exercise the above copyright
|
|
* license, and in no event shall the patent license extend to any additions
|
|
* to or modifications of the Original Intel Code. No other license or right
|
|
* is granted directly or by implication, estoppel or otherwise;
|
|
*
|
|
* The above copyright and patent license is granted only if the following
|
|
* conditions are met:
|
|
*
|
|
* 3. Conditions
|
|
*
|
|
* 3.1. Redistribution of Source with Rights to Further Distribute Source.
|
|
* Redistribution of source code of any substantial portion of the Covered
|
|
* Code or modification with rights to further distribute source must include
|
|
* the above Copyright Notice, the above License, this list of Conditions,
|
|
* and the following Disclaimer and Export Compliance provision. In addition,
|
|
* Licensee must cause all Covered Code to which Licensee contributes to
|
|
* contain a file documenting the changes Licensee made to create that Covered
|
|
* Code and the date of any change. Licensee must include in that file the
|
|
* documentation of any changes made by any predecessor Licensee. Licensee
|
|
* must include a prominent statement that the modification is derived,
|
|
* directly or indirectly, from Original Intel Code.
|
|
*
|
|
* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
|
|
* Redistribution of source code of any substantial portion of the Covered
|
|
* Code or modification without rights to further distribute source must
|
|
* include the following Disclaimer and Export Compliance provision in the
|
|
* documentation and/or other materials provided with distribution. In
|
|
* addition, Licensee may not authorize further sublicense of source of any
|
|
* portion of the Covered Code, and must include terms to the effect that the
|
|
* license from Licensee to its licensee is limited to the intellectual
|
|
* property embodied in the software Licensee provides to its licensee, and
|
|
* not to intellectual property embodied in modifications its licensee may
|
|
* make.
|
|
*
|
|
* 3.3. Redistribution of Executable. Redistribution in executable form of any
|
|
* substantial portion of the Covered Code or modification must reproduce the
|
|
* above Copyright Notice, and the following Disclaimer and Export Compliance
|
|
* provision in the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* 3.4. Intel retains all right, title, and interest in and to the Original
|
|
* Intel Code.
|
|
*
|
|
* 3.5. Neither the name Intel nor any other trademark owned or controlled by
|
|
* Intel shall be used in advertising or otherwise to promote the sale, use or
|
|
* other dealings in products derived from or relating to the Covered Code
|
|
* without prior written authorization from Intel.
|
|
*
|
|
* 4. Disclaimer and Export Compliance
|
|
*
|
|
* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
|
|
* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
|
|
* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
|
|
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
|
|
* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
|
|
* PARTICULAR PURPOSE.
|
|
*
|
|
* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
|
|
* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
|
|
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
|
|
* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
|
|
* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
|
|
* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
|
|
* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
|
|
* LIMITED REMEDY.
|
|
*
|
|
* 4.3. Licensee shall not export, either directly or indirectly, any of this
|
|
* software or system incorporating such software without first obtaining any
|
|
* required license or other approval from the U. S. Department of Commerce or
|
|
* any other agency or department of the United States Government. In the
|
|
* event Licensee exports any such software from the United States or
|
|
* re-exports any such software from a foreign destination, Licensee shall
|
|
* ensure that the distribution and export/re-export of the software is in
|
|
* compliance with all laws, regulations, orders, or other restrictions of the
|
|
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
|
|
* any of its subsidiaries will export/re-export any technical data, process,
|
|
* software, or service, directly or indirectly, to any country for which the
|
|
* United States government or any agency thereof requires an export license,
|
|
* other governmental approval, or letter of assurance, without first obtaining
|
|
* such license, approval or letter.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#define __EXSYSTEM_C__
|
|
|
|
#include "acpi.h"
|
|
#include "accommon.h"
|
|
#include "acinterp.h"
|
|
|
|
#define _COMPONENT ACPI_EXECUTER
|
|
ACPI_MODULE_NAME ("exsystem")
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiExSystemWaitSemaphore
|
|
*
|
|
* 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
|
|
AcpiExSystemWaitSemaphore (
|
|
ACPI_SEMAPHORE Semaphore,
|
|
UINT16 Timeout)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (ExSystemWaitSemaphore);
|
|
|
|
|
|
Status = AcpiOsWaitSemaphore (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 */
|
|
|
|
AcpiExRelinquishInterpreter ();
|
|
|
|
Status = AcpiOsWaitSemaphore (Semaphore, 1, Timeout);
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
|
|
"*** Thread awake after blocking, %s\n",
|
|
AcpiFormatException (Status)));
|
|
|
|
/* Reacquire the interpreter */
|
|
|
|
AcpiExReacquireInterpreter ();
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiExSystemWaitMutex
|
|
*
|
|
* 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
|
|
AcpiExSystemWaitMutex (
|
|
ACPI_MUTEX Mutex,
|
|
UINT16 Timeout)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (ExSystemWaitMutex);
|
|
|
|
|
|
Status = AcpiOsAcquireMutex (Mutex, ACPI_DO_NOT_WAIT);
|
|
if (ACPI_SUCCESS (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
if (Status == AE_TIME)
|
|
{
|
|
/* We must wait, so unlock the interpreter */
|
|
|
|
AcpiExRelinquishInterpreter ();
|
|
|
|
Status = AcpiOsAcquireMutex (Mutex, Timeout);
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
|
|
"*** Thread awake after blocking, %s\n",
|
|
AcpiFormatException (Status)));
|
|
|
|
/* Reacquire the interpreter */
|
|
|
|
AcpiExReacquireInterpreter ();
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiExSystemDoStall
|
|
*
|
|
* PARAMETERS: HowLong - 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
|
|
AcpiExSystemDoStall (
|
|
UINT32 HowLong)
|
|
{
|
|
ACPI_STATUS Status = AE_OK;
|
|
|
|
|
|
ACPI_FUNCTION_ENTRY ();
|
|
|
|
|
|
if (HowLong > 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)",
|
|
HowLong));
|
|
Status = AE_AML_OPERAND_VALUE;
|
|
}
|
|
else
|
|
{
|
|
AcpiOsStall (HowLong);
|
|
}
|
|
|
|
return (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiExSystemDoSleep
|
|
*
|
|
* PARAMETERS: HowLong - The amount of time to sleep,
|
|
* in milliseconds
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Sleep the running thread for specified amount of time.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiExSystemDoSleep (
|
|
UINT64 HowLong)
|
|
{
|
|
ACPI_FUNCTION_ENTRY ();
|
|
|
|
|
|
/* Since this thread will sleep, we must release the interpreter */
|
|
|
|
AcpiExRelinquishInterpreter ();
|
|
|
|
/*
|
|
* For compatibility with other ACPI implementations and to prevent
|
|
* accidental deep sleeps, limit the sleep time to something reasonable.
|
|
*/
|
|
if (HowLong > ACPI_MAX_SLEEP)
|
|
{
|
|
HowLong = ACPI_MAX_SLEEP;
|
|
}
|
|
|
|
AcpiOsSleep (HowLong);
|
|
|
|
/* And now we must get the interpreter again */
|
|
|
|
AcpiExReacquireInterpreter ();
|
|
return (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiExSystemSignalEvent
|
|
*
|
|
* PARAMETERS: ObjDesc - The object descriptor for this op
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Provides an access point to perform synchronization operations
|
|
* within the AML.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiExSystemSignalEvent (
|
|
ACPI_OPERAND_OBJECT *ObjDesc)
|
|
{
|
|
ACPI_STATUS Status = AE_OK;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (ExSystemSignalEvent);
|
|
|
|
|
|
if (ObjDesc)
|
|
{
|
|
Status = AcpiOsSignalSemaphore (ObjDesc->Event.OsSemaphore, 1);
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiExSystemWaitEvent
|
|
*
|
|
* PARAMETERS: TimeDesc - The 'time to delay' object descriptor
|
|
* ObjDesc - 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
|
|
AcpiExSystemWaitEvent (
|
|
ACPI_OPERAND_OBJECT *TimeDesc,
|
|
ACPI_OPERAND_OBJECT *ObjDesc)
|
|
{
|
|
ACPI_STATUS Status = AE_OK;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (ExSystemWaitEvent);
|
|
|
|
|
|
if (ObjDesc)
|
|
{
|
|
Status = AcpiExSystemWaitSemaphore (ObjDesc->Event.OsSemaphore,
|
|
(UINT16) TimeDesc->Integer.Value);
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiExSystemResetEvent
|
|
*
|
|
* PARAMETERS: ObjDesc - The object descriptor for this op
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Reset an event to a known state.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiExSystemResetEvent (
|
|
ACPI_OPERAND_OBJECT *ObjDesc)
|
|
{
|
|
ACPI_STATUS Status = AE_OK;
|
|
ACPI_SEMAPHORE TempSemaphore;
|
|
|
|
|
|
ACPI_FUNCTION_ENTRY ();
|
|
|
|
|
|
/*
|
|
* We are going to simply delete the existing semaphore and
|
|
* create a new one!
|
|
*/
|
|
Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT, 0, &TempSemaphore);
|
|
if (ACPI_SUCCESS (Status))
|
|
{
|
|
(void) AcpiOsDeleteSemaphore (ObjDesc->Event.OsSemaphore);
|
|
ObjDesc->Event.OsSemaphore = TempSemaphore;
|
|
}
|
|
|
|
return (Status);
|
|
}
|
|
|