575 lines
18 KiB
C
575 lines
18 KiB
C
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/******************************************************************************
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*
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* Module Name: exutils - interpreter/scanner utilities
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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 - 2011, 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 __EXUTILS_C__
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/*
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* DEFINE_AML_GLOBALS is tested in amlcode.h
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* to determine whether certain global names should be "defined" or only
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* "declared" in the current compilation. This enhances maintainability
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* by enabling a single header file to embody all knowledge of the names
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* in question.
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*
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* Exactly one module of any executable should #define DEFINE_GLOBALS
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* before #including the header files which use this convention. The
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* names in question will be defined and initialized in that module,
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* and declared as extern in all other modules which #include those
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* header files.
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*/
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#define DEFINE_AML_GLOBALS
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#include "acpi.h"
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#include "accommon.h"
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#include "acinterp.h"
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#include "amlcode.h"
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME ("exutils")
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/* Local prototypes */
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static UINT32
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AcpiExDigitsNeeded (
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UINT64 Value,
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UINT32 Base);
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#ifndef ACPI_NO_METHOD_EXECUTION
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/*******************************************************************************
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*
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* FUNCTION: AcpiExEnterInterpreter
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*
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* PARAMETERS: None
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*
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* RETURN: None
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*
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* DESCRIPTION: Enter the interpreter execution region. Failure to enter
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* the interpreter region is a fatal system error. Used in
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* conjunction with ExitInterpreter.
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*
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******************************************************************************/
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void
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AcpiExEnterInterpreter (
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void)
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{
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (ExEnterInterpreter);
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Status = AcpiUtAcquireMutex (ACPI_MTX_INTERPRETER);
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if (ACPI_FAILURE (Status))
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{
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ACPI_ERROR ((AE_INFO, "Could not acquire AML Interpreter mutex"));
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}
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExReacquireInterpreter
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*
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* PARAMETERS: None
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*
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* RETURN: None
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*
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* DESCRIPTION: Reacquire the interpreter execution region from within the
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* interpreter code. Failure to enter the interpreter region is a
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* fatal system error. Used in conjuction with
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* RelinquishInterpreter
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*
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******************************************************************************/
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void
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AcpiExReacquireInterpreter (
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void)
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{
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ACPI_FUNCTION_TRACE (ExReacquireInterpreter);
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/*
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* If the global serialized flag is set, do not release the interpreter,
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* since it was not actually released by AcpiExRelinquishInterpreter.
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* This forces the interpreter to be single threaded.
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*/
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if (!AcpiGbl_AllMethodsSerialized)
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{
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AcpiExEnterInterpreter ();
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}
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExExitInterpreter
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*
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* PARAMETERS: None
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*
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* RETURN: None
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*
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* DESCRIPTION: Exit the interpreter execution region. This is the top level
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* routine used to exit the interpreter when all processing has
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* been completed.
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*
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******************************************************************************/
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void
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AcpiExExitInterpreter (
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void)
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{
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (ExExitInterpreter);
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Status = AcpiUtReleaseMutex (ACPI_MTX_INTERPRETER);
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if (ACPI_FAILURE (Status))
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{
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ACPI_ERROR ((AE_INFO, "Could not release AML Interpreter mutex"));
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}
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExRelinquishInterpreter
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*
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* PARAMETERS: None
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*
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* RETURN: None
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*
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* DESCRIPTION: Exit the interpreter execution region, from within the
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* interpreter - before attempting an operation that will possibly
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* block the running thread.
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*
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* Cases where the interpreter is unlocked internally
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* 1) Method to be blocked on a Sleep() AML opcode
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* 2) Method to be blocked on an Acquire() AML opcode
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* 3) Method to be blocked on a Wait() AML opcode
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* 4) Method to be blocked to acquire the global lock
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* 5) Method to be blocked waiting to execute a serialized control method
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* that is currently executing
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* 6) About to invoke a user-installed opregion handler
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*
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******************************************************************************/
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void
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AcpiExRelinquishInterpreter (
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void)
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{
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ACPI_FUNCTION_TRACE (ExRelinquishInterpreter);
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/*
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* If the global serialized flag is set, do not release the interpreter.
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* This forces the interpreter to be single threaded.
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*/
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if (!AcpiGbl_AllMethodsSerialized)
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{
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AcpiExExitInterpreter ();
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}
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExTruncateFor32bitTable
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*
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* PARAMETERS: ObjDesc - Object to be truncated
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*
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* RETURN: none
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*
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* DESCRIPTION: Truncate an ACPI Integer to 32 bits if the execution mode is
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* 32-bit, as determined by the revision of the DSDT.
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*
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******************************************************************************/
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void
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AcpiExTruncateFor32bitTable (
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ACPI_OPERAND_OBJECT *ObjDesc)
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{
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ACPI_FUNCTION_ENTRY ();
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/*
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* Object must be a valid number and we must be executing
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* a control method. NS node could be there for AML_INT_NAMEPATH_OP.
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*/
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if ((!ObjDesc) ||
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(ACPI_GET_DESCRIPTOR_TYPE (ObjDesc) != ACPI_DESC_TYPE_OPERAND) ||
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(ObjDesc->Common.Type != ACPI_TYPE_INTEGER))
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{
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return;
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}
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if (AcpiGbl_IntegerByteWidth == 4)
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{
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/*
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* We are running a method that exists in a 32-bit ACPI table.
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* Truncate the value to 32 bits by zeroing out the upper 32-bit field
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*/
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ObjDesc->Integer.Value &= (UINT64) ACPI_UINT32_MAX;
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExAcquireGlobalLock
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*
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* PARAMETERS: FieldFlags - Flags with Lock rule:
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* AlwaysLock or NeverLock
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*
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* RETURN: None
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*
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* DESCRIPTION: Obtain the ACPI hardware Global Lock, only if the field
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* flags specifiy that it is to be obtained before field access.
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*
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******************************************************************************/
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void
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AcpiExAcquireGlobalLock (
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UINT32 FieldFlags)
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{
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (ExAcquireGlobalLock);
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/* Only use the lock if the AlwaysLock bit is set */
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if (!(FieldFlags & AML_FIELD_LOCK_RULE_MASK))
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{
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return_VOID;
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}
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/* Attempt to get the global lock, wait forever */
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Status = AcpiExAcquireMutexObject (ACPI_WAIT_FOREVER,
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AcpiGbl_GlobalLockMutex, AcpiOsGetThreadId ());
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if (ACPI_FAILURE (Status))
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{
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ACPI_EXCEPTION ((AE_INFO, Status,
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"Could not acquire Global Lock"));
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}
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExReleaseGlobalLock
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*
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* PARAMETERS: FieldFlags - Flags with Lock rule:
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* AlwaysLock or NeverLock
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*
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* RETURN: None
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*
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* DESCRIPTION: Release the ACPI hardware Global Lock
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*
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******************************************************************************/
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void
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AcpiExReleaseGlobalLock (
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UINT32 FieldFlags)
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{
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (ExReleaseGlobalLock);
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/* Only use the lock if the AlwaysLock bit is set */
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if (!(FieldFlags & AML_FIELD_LOCK_RULE_MASK))
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{
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return_VOID;
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}
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/* Release the global lock */
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Status = AcpiExReleaseMutexObject (AcpiGbl_GlobalLockMutex);
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if (ACPI_FAILURE (Status))
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{
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/* Report the error, but there isn't much else we can do */
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ACPI_EXCEPTION ((AE_INFO, Status,
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"Could not release Global Lock"));
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}
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExDigitsNeeded
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*
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* PARAMETERS: Value - Value to be represented
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* Base - Base of representation
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*
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* RETURN: The number of digits.
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*
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* DESCRIPTION: Calculate the number of digits needed to represent the Value
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* in the given Base (Radix)
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*
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******************************************************************************/
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static UINT32
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AcpiExDigitsNeeded (
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UINT64 Value,
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UINT32 Base)
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{
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UINT32 NumDigits;
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UINT64 CurrentValue;
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ACPI_FUNCTION_TRACE (ExDigitsNeeded);
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/* UINT64 is unsigned, so we don't worry about a '-' prefix */
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if (Value == 0)
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{
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return_UINT32 (1);
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}
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CurrentValue = Value;
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NumDigits = 0;
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/* Count the digits in the requested base */
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while (CurrentValue)
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{
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(void) AcpiUtShortDivide (CurrentValue, Base, &CurrentValue, NULL);
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NumDigits++;
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}
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return_UINT32 (NumDigits);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExEisaIdToString
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*
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* PARAMETERS: CompressedId - EISAID to be converted
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* OutString - Where to put the converted string (8 bytes)
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*
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* RETURN: None
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*
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* DESCRIPTION: Convert a numeric EISAID to string representation. Return
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* buffer must be large enough to hold the string. The string
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* returned is always exactly of length ACPI_EISAID_STRING_SIZE
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* (includes null terminator). The EISAID is always 32 bits.
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*
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******************************************************************************/
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void
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AcpiExEisaIdToString (
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char *OutString,
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UINT64 CompressedId)
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{
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UINT32 SwappedId;
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ACPI_FUNCTION_ENTRY ();
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/* The EISAID should be a 32-bit integer */
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if (CompressedId > ACPI_UINT32_MAX)
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{
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ACPI_WARNING ((AE_INFO,
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"Expected EISAID is larger than 32 bits: 0x%8.8X%8.8X, truncating",
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ACPI_FORMAT_UINT64 (CompressedId)));
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}
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/* Swap ID to big-endian to get contiguous bits */
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SwappedId = AcpiUtDwordByteSwap ((UINT32) CompressedId);
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/* First 3 bytes are uppercase letters. Next 4 bytes are hexadecimal */
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OutString[0] = (char) (0x40 + (((unsigned long) SwappedId >> 26) & 0x1F));
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OutString[1] = (char) (0x40 + ((SwappedId >> 21) & 0x1F));
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OutString[2] = (char) (0x40 + ((SwappedId >> 16) & 0x1F));
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OutString[3] = AcpiUtHexToAsciiChar ((UINT64) SwappedId, 12);
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OutString[4] = AcpiUtHexToAsciiChar ((UINT64) SwappedId, 8);
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OutString[5] = AcpiUtHexToAsciiChar ((UINT64) SwappedId, 4);
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OutString[6] = AcpiUtHexToAsciiChar ((UINT64) SwappedId, 0);
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OutString[7] = 0;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExIntegerToString
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*
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* PARAMETERS: OutString - Where to put the converted string. At least
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* 21 bytes are needed to hold the largest
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* possible 64-bit integer.
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* Value - Value to be converted
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*
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* RETURN: None, string
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*
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* DESCRIPTION: Convert a 64-bit integer to decimal string representation.
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* Assumes string buffer is large enough to hold the string. The
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* largest string is (ACPI_MAX64_DECIMAL_DIGITS + 1).
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*
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******************************************************************************/
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void
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AcpiExIntegerToString (
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char *OutString,
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UINT64 Value)
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{
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UINT32 Count;
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UINT32 DigitsNeeded;
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UINT32 Remainder;
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ACPI_FUNCTION_ENTRY ();
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DigitsNeeded = AcpiExDigitsNeeded (Value, 10);
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OutString[DigitsNeeded] = 0;
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for (Count = DigitsNeeded; Count > 0; Count--)
|
|
{
|
|
(void) AcpiUtShortDivide (Value, 10, &Value, &Remainder);
|
|
OutString[Count-1] = (char) ('0' + Remainder);\
|
|
}
|
|
}
|
|
|
|
#endif
|