464 lines
15 KiB
C
464 lines
15 KiB
C
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/******************************************************************************
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*
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* Module Name: amsystem - Interface to OS services
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* $Revision: 53 $
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*
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*****************************************************************************/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999, 2000, Intel Corp.
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* All rights reserved.
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*
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* 2. License
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*
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* 2.1. This is your license from Intel Corp. under its intellectual property
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* rights. You may have additional license terms from the party that provided
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* you this software, covering your right to use that party's intellectual
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* property rights.
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*
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* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") an
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* irrevocable, perpetual, worldwide license under Intel's copyrights in the
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* base code distributed originally by Intel ("Original Intel Code") to copy,
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* make derivatives, distribute, use and display any portion of the Covered
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* Code in any form, with the right to sublicense such rights; and
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*
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* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (with the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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* license, and in no event shall the patent license extend to any additions
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* to or modifications of the Original Intel Code. No other license or right
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* is granted directly or by implication, estoppel or otherwise;
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*
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* The above copyright and patent license is granted only if the following
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* conditions are met:
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*
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* 3. Conditions
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*
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* 3.1. Redistribution of Source with Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification with rights to further distribute source must include
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* the above Copyright Notice, the above License, this list of Conditions,
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* and the following Disclaimer and Export Compliance provision. In addition,
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* Licensee must cause all Covered Code to which Licensee contributes to
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* contain a file documenting the changes Licensee made to create that Covered
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* Code and the date of any change. Licensee must include in that file the
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* documentation of any changes made by any predecessor Licensee. Licensee
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* must include a prominent statement that the modification is derived,
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* directly or indirectly, from Original Intel Code.
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*
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* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification without rights to further distribute source must
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* include the following Disclaimer and Export Compliance provision in the
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* documentation and/or other materials provided with distribution. In
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* addition, Licensee may not authorize further sublicense of source of any
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* portion of the Covered Code, and must include terms to the effect that the
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* license from Licensee to its licensee is limited to the intellectual
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* property embodied in the software Licensee provides to its licensee, and
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* not to intellectual property embodied in modifications its licensee may
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* make.
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*
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* 3.3. Redistribution of Executable. Redistribution in executable form of any
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* substantial portion of the Covered Code or modification must reproduce the
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* above Copyright Notice, and the following Disclaimer and Export Compliance
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* provision in the documentation and/or other materials provided with the
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* distribution.
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*
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* 3.4. Intel retains all right, title, and interest in and to the Original
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* Intel Code.
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*
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* 3.5. Neither the name Intel nor any other trademark owned or controlled by
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* Intel shall be used in advertising or otherwise to promote the sale, use or
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* other dealings in products derived from or relating to the Covered Code
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* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
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*
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* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
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* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
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* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
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* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
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* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
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* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
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* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
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* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
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* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
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* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
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* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
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* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
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* LIMITED REMEDY.
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*
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* 4.3. Licensee shall not export, either directly or indirectly, any of this
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* software or system incorporating such software without first obtaining any
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* required license or other approval from the U. S. Department of Commerce or
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* any other agency or department of the United States Government. In the
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* event Licensee exports any such software from the United States or
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* re-exports any such software from a foreign destination, Licensee shall
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* ensure that the distribution and export/re-export of the software is in
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* compliance with all laws, regulations, orders, or other restrictions of the
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* U.S. Export Administration Regulations. Licensee agrees that neither it nor
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* any of its subsidiaries will export/re-export any technical data, process,
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* software, or service, directly or indirectly, to any country for which the
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* United States government or any agency thereof requires an export license,
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* other governmental approval, or letter of assurance, without first obtaining
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* such license, approval or letter.
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*
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*****************************************************************************/
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#define __AMSYSTEM_C__
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#include "acpi.h"
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#include "acinterp.h"
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#include "acnamesp.h"
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#include "achware.h"
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#include "acevents.h"
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#define _COMPONENT INTERPRETER
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MODULE_NAME ("amsystem")
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/*******************************************************************************
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*
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* FUNCTION: AcpiAmlSystemThreadId
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*
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* PARAMETERS: None
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*
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* RETURN: Current Thread ID (for this implementation a 1 is returned)
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*
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* DESCRIPTION: An invocation is identified by its Thread ID. In a single
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* threaded OS the Thread ID is undefined so a 1 will be
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* returned.
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*
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******************************************************************************/
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UINT16
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AcpiAmlSystemThreadId (void)
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{
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return (1);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiAmlSystemWaitSemaphore
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*
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* PARAMETERS: Semaphore - OSD semaphore to wait on
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* Timeout - Max time to wait
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*
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* RETURN: Status
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*
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* DESCRIPTION: Implements a semaphore wait with a check to see if the
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* semaphore is available immediately. If it is not, the
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* interpreter is released.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiAmlSystemWaitSemaphore (
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ACPI_HANDLE Semaphore,
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UINT32 Timeout)
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{
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ACPI_STATUS Status;
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FUNCTION_TRACE ("AcpiAmlSystemWaitSemaphore");
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Status = AcpiOsWaitSemaphore (Semaphore, 1, 0);
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if (ACPI_SUCCESS (Status))
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{
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return_ACPI_STATUS (Status);
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}
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if (Status == AE_TIME)
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{
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/* We must wait, so unlock the interpreter */
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AcpiAmlExitInterpreter ();
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Status = AcpiOsWaitSemaphore (Semaphore, 1, Timeout);
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/* Reacquire the interpreter */
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AcpiAmlEnterInterpreter ();
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DEBUG_PRINT (TRACE_EXEC,
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("*** Thread awake and inside interpreter after blocking, %s\n",
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AcpiCmFormatException (Status)));
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}
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiAmlSystemDoStall
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*
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* PARAMETERS: HowLong - The amount of time to stall
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*
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* RETURN: None
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*
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* DESCRIPTION: Suspend running thread for specified amount of time.
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*
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******************************************************************************/
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void
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AcpiAmlSystemDoStall (
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UINT32 HowLong)
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{
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if (HowLong > 1000) /* 1 millisecond */
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{
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/* Since this thread will sleep, we must release the interpreter */
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AcpiAmlExitInterpreter ();
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AcpiOsSleepUsec (HowLong);
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/* And now we must get the interpreter again */
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AcpiAmlEnterInterpreter ();
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}
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else
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{
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AcpiOsSleepUsec (HowLong);
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiAmlSystemDoSuspend
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*
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* PARAMETERS: HowLong - The amount of time to suspend
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*
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* RETURN: None
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*
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* DESCRIPTION: Suspend running thread for specified amount of time.
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*
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******************************************************************************/
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void
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AcpiAmlSystemDoSuspend (
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UINT32 HowLong)
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{
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/* Since this thread will sleep, we must release the interpreter */
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AcpiAmlExitInterpreter ();
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AcpiOsSleep ((UINT16) (HowLong / (UINT32) 1000),
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(UINT16) (HowLong % (UINT32) 1000));
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/* And now we must get the interpreter again */
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AcpiAmlEnterInterpreter ();
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiAmlSystemAcquireMutex
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*
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* PARAMETERS: *TimeDesc - The 'time to delay' object descriptor
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* *ObjDesc - The object descriptor for this op
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*
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* RETURN: Status
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*
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* DESCRIPTION: Provides an access point to perform synchronization operations
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* within the AML. This function will cause a lock to be generated
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* for the Mutex pointed to by ObjDesc.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiAmlSystemAcquireMutex (
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ACPI_OPERAND_OBJECT *TimeDesc,
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ACPI_OPERAND_OBJECT *ObjDesc)
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{
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ACPI_STATUS Status = AE_OK;
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FUNCTION_TRACE_PTR ("AcpiAmlSystemAcquireMutex", ObjDesc);
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if (!ObjDesc)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/*
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* Support for the _GL_ Mutex object -- go get the global lock
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*/
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if (ObjDesc->Mutex.Semaphore == AcpiGbl_GlobalLockSemaphore)
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{
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Status = AcpiEvAcquireGlobalLock ();
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return_ACPI_STATUS (Status);
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}
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Status = AcpiAmlSystemWaitSemaphore (ObjDesc->Mutex.Semaphore,
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(UINT32) TimeDesc->Number.Value);
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiAmlSystemReleaseMutex
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*
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* PARAMETERS: *ObjDesc - The object descriptor for this op
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*
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* RETURN: Status
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*
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* DESCRIPTION: Provides an access point to perform synchronization operations
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* within the AML. This operation is a request to release a
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* previously acquired Mutex. If the Mutex variable is set then
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* it will be decremented.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiAmlSystemReleaseMutex (
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ACPI_OPERAND_OBJECT *ObjDesc)
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{
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ACPI_STATUS Status = AE_OK;
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FUNCTION_TRACE ("AcpiAmlSystemReleaseMutex");
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if (!ObjDesc)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/*
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* Support for the _GL_ Mutex object -- release the global lock
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*/
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if (ObjDesc->Mutex.Semaphore == AcpiGbl_GlobalLockSemaphore)
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{
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AcpiEvReleaseGlobalLock ();
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return_ACPI_STATUS (AE_OK);
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}
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Status = AcpiOsSignalSemaphore (ObjDesc->Mutex.Semaphore, 1);
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiAmlSystemSignalEvent
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*
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* PARAMETERS: *ObjDesc - The object descriptor for this op
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*
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* RETURN: AE_OK
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*
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* DESCRIPTION: Provides an access point to perform synchronization operations
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* within the AML.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiAmlSystemSignalEvent (
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ACPI_OPERAND_OBJECT *ObjDesc)
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{
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ACPI_STATUS Status = AE_OK;
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FUNCTION_TRACE ("AcpiAmlSystemSignalEvent");
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if (ObjDesc)
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{
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Status = AcpiOsSignalSemaphore (ObjDesc->Event.Semaphore, 1);
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}
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiAmlSystemWaitEvent
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*
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* PARAMETERS: *TimeDesc - The 'time to delay' object descriptor
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* *ObjDesc - The object descriptor for this op
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*
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* RETURN: Status
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*
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* DESCRIPTION: Provides an access point to perform synchronization operations
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* within the AML. This operation is a request to wait for an
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* event.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiAmlSystemWaitEvent (
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ACPI_OPERAND_OBJECT *TimeDesc,
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ACPI_OPERAND_OBJECT *ObjDesc)
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{
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ACPI_STATUS Status = AE_OK;
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FUNCTION_TRACE ("AcpiAmlSystemWaitEvent");
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if (ObjDesc)
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{
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Status = AcpiAmlSystemWaitSemaphore (ObjDesc->Event.Semaphore,
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(UINT32) TimeDesc->Number.Value);
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}
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiAmlSystemResetEvent
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*
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* PARAMETERS: *ObjDesc - The object descriptor for this op
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*
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* RETURN: Status
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*
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* DESCRIPTION: Provides an access point to perform synchronization operations
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* within the AML.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiAmlSystemResetEvent (
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ACPI_OPERAND_OBJECT *ObjDesc)
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{
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ACPI_STATUS Status = AE_OK;
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void *TempSemaphore;
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/*
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* We are going to simply delete the existing semaphore and
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* create a new one!
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*/
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Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT, 0, &TempSemaphore);
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if (ACPI_SUCCESS (Status))
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{
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AcpiOsDeleteSemaphore (ObjDesc->Mutex.Semaphore);
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ObjDesc->Mutex.Semaphore = TempSemaphore;
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}
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return (Status);
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}
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