488 lines
15 KiB
C
488 lines
15 KiB
C
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/******************************************************************************
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*
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* Module Name: exutils - interpreter/scanner utilities
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* $Revision: 82 $
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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, 2001, 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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#include "acpi.h"
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#include "acparser.h"
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#include "acinterp.h"
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#include "amlcode.h"
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#include "acnamesp.h"
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#include "acevents.h"
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#define _COMPONENT ACPI_EXECUTER
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MODULE_NAME ("exutils")
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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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* DESCRIPTION: Enter the interpreter execution region
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* TBD: should be a macro
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExEnterInterpreter (void)
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{
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ACPI_STATUS Status;
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FUNCTION_TRACE ("ExEnterInterpreter");
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Status = AcpiUtAcquireMutex (ACPI_MTX_EXECUTE);
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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: AcpiExExitInterpreter
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*
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* PARAMETERS: None
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*
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* DESCRIPTION: Exit the interpreter execution region
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*
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* Cases where the interpreter is unlocked:
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* 1) Completion of the execution of a control method
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* 2) Method blocked on a Sleep() AML opcode
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* 3) Method blocked on an Acquire() AML opcode
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* 4) Method blocked on a Wait() AML opcode
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* 5) Method blocked to acquire the global lock
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* 6) Method blocked to execute a serialized control method that is
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* already executing
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* 7) About to invoke a user-installed opregion handler
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*
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* TBD: should be a macro
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*
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******************************************************************************/
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void
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AcpiExExitInterpreter (void)
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{
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FUNCTION_TRACE ("ExExitInterpreter");
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AcpiUtReleaseMutex (ACPI_MTX_EXECUTE);
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExValidateObjectType
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*
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* PARAMETERS: Type Object type to validate
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*
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* DESCRIPTION: Determine if a type is a valid ACPI object type
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*
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******************************************************************************/
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BOOLEAN
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AcpiExValidateObjectType (
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ACPI_OBJECT_TYPE Type)
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{
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if ((Type > ACPI_TYPE_MAX && Type < INTERNAL_TYPE_BEGIN) ||
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(Type > INTERNAL_TYPE_MAX))
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{
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return (FALSE);
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}
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return (TRUE);
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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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* WalkState - Current walk state
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* (A method must be executing)
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*
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* RETURN: none
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*
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* DESCRIPTION: Truncate a number to 32-bits if the currently executing method
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* belongs to a 32-bit ACPI table.
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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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ACPI_WALK_STATE *WalkState)
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{
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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
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*/
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if ((!ObjDesc) ||
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(ObjDesc->Common.Type != ACPI_TYPE_INTEGER) ||
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(!WalkState->MethodNode))
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{
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return;
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}
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if (WalkState->MethodNode->Flags & ANOBJ_DATA_WIDTH_32)
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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 &= (ACPI_INTEGER) 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: Rule - Lock rule: AlwaysLock, NeverLock
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*
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* RETURN: TRUE/FALSE indicating whether the lock was actually acquired
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*
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* DESCRIPTION: Obtain the global lock and keep track of this fact via two
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* methods. A global variable keeps the state of the lock, and
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* the state is returned to the caller.
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*
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******************************************************************************/
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BOOLEAN
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AcpiExAcquireGlobalLock (
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UINT32 Rule)
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{
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BOOLEAN Locked = FALSE;
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ACPI_STATUS Status;
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FUNCTION_TRACE ("ExAcquireGlobalLock");
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/* Only attempt lock if the Rule says so */
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if (Rule == (UINT32) GLOCK_ALWAYS_LOCK)
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{
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/* We should attempt to get the lock */
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Status = AcpiEvAcquireGlobalLock ();
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if (ACPI_SUCCESS (Status))
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{
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Locked = TRUE;
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}
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else
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not acquire Global Lock, %s\n",
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AcpiFormatException (Status)));
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}
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}
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return_VALUE (Locked);
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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: LockedByMe - Return value from corresponding call to
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* AcquireGlobalLock.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Release the global lock if it is locked.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExReleaseGlobalLock (
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BOOLEAN LockedByMe)
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{
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FUNCTION_TRACE ("ExReleaseGlobalLock");
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/* Only attempt unlock if the caller locked it */
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if (LockedByMe)
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{
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/* OK, now release the lock */
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AcpiEvReleaseGlobalLock ();
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}
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return_ACPI_STATUS (AE_OK);
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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: val - 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 needed to represent val in base
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*
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******************************************************************************/
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UINT32
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AcpiExDigitsNeeded (
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ACPI_INTEGER val,
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UINT32 base)
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{
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UINT32 NumDigits = 0;
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FUNCTION_TRACE ("ExDigitsNeeded");
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if (base < 1)
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{
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REPORT_ERROR (("ExDigitsNeeded: Internal error - Invalid base\n"));
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}
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else
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{
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/*
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* ACPI_INTEGER is unsigned, which is why we don't worry about the '-'
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*/
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for (NumDigits = 1; (val = ACPI_DIVIDE (val,base)); ++NumDigits)
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{ ; }
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}
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return_VALUE (NumDigits);
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}
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/*******************************************************************************
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*
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* FUNCTION: ntohl
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*
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* PARAMETERS: Value - Value to be converted
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*
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* DESCRIPTION: Convert a 32-bit value to big-endian (swap the bytes)
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*
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******************************************************************************/
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static UINT32
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_ntohl (
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UINT32 Value)
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{
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union
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{
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UINT32 Value;
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UINT8 Bytes[4];
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} Out;
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union
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{
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UINT32 Value;
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UINT8 Bytes[4];
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} In;
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In.Value = Value;
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Out.Bytes[0] = In.Bytes[3];
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Out.Bytes[1] = In.Bytes[2];
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Out.Bytes[2] = In.Bytes[1];
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Out.Bytes[3] = In.Bytes[0];
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return (Out.Value);
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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: NumericId - EISA ID to be converted
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* OutString - Where to put the converted string (8 bytes)
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*
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* DESCRIPTION: Convert a numeric EISA ID to string representation
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExEisaIdToString (
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UINT32 NumericId,
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NATIVE_CHAR *OutString)
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{
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UINT32 id;
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/* swap to big-endian to get contiguous bits */
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id = _ntohl (NumericId);
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OutString[0] = (char) ('@' + ((id >> 26) & 0x1f));
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OutString[1] = (char) ('@' + ((id >> 21) & 0x1f));
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OutString[2] = (char) ('@' + ((id >> 16) & 0x1f));
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OutString[3] = AcpiUtHexToAsciiChar (id, 12);
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OutString[4] = AcpiUtHexToAsciiChar (id, 8);
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OutString[5] = AcpiUtHexToAsciiChar (id, 4);
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OutString[6] = AcpiUtHexToAsciiChar (id, 0);
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OutString[7] = 0;
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExUnsignedIntegerToString
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*
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* PARAMETERS: Value - Value 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: Convert a number to string representation
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExUnsignedIntegerToString (
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ACPI_INTEGER Value,
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NATIVE_CHAR *OutString)
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{
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UINT32 Count;
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UINT32 DigitsNeeded;
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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--)
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{
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OutString[Count-1] = (NATIVE_CHAR) ('0' + (ACPI_MODULO (Value, 10)));
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Value = ACPI_DIVIDE (Value, 10);
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}
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return (AE_OK);
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}
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