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 /******************************************************************************
  *
  * Module Name: psxface - Parser external interfaces
  *
  *****************************************************************************/
 
 /******************************************************************************
  *
  * 1. Copyright Notice
  *
  * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp.
  * All rights reserved.
  *
  * 2. License
  *
  * 2.1. This is your license from Intel Corp. under its intellectual property
  * rights.  You may have additional license terms from the party that provided
  * you this software, covering your right to use that party's intellectual
  * property rights.
  *
  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  * copy of the source code appearing in this file ("Covered Code") an
  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  * base code distributed originally by Intel ("Original Intel Code") to copy,
  * make derivatives, distribute, use and display any portion of the Covered
  * Code in any form, with the right to sublicense such rights; and
  *
  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  * license (with the right to sublicense), under only those claims of Intel
  * patents that are infringed by the Original Intel Code, to make, use, sell,
  * offer to sell, and import the Covered Code and derivative works thereof
  * solely to the minimum extent necessary to exercise the above copyright
  * license, and in no event shall the patent license extend to any additions
  * to or modifications of the Original Intel Code.  No other license or right
  * is granted directly or by implication, estoppel or otherwise;
  *
  * The above copyright and patent license is granted only if the following
  * conditions are met:
  *
  * 3. Conditions
  *
  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  * Redistribution of source code of any substantial portion of the Covered
  * Code or modification with rights to further distribute source must include
  * the above Copyright Notice, the above License, this list of Conditions,
  * and the following Disclaimer and Export Compliance provision.  In addition,
  * Licensee must cause all Covered Code to which Licensee contributes to
  * contain a file documenting the changes Licensee made to create that Covered
  * Code and the date of any change.  Licensee must include in that file the
  * documentation of any changes made by any predecessor Licensee.  Licensee
  * must include a prominent statement that the modification is derived,
  * directly or indirectly, from Original Intel Code.
  *
  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  * Redistribution of source code of any substantial portion of the Covered
  * Code or modification without rights to further distribute source must
  * include the following Disclaimer and Export Compliance provision in the
  * documentation and/or other materials provided with distribution.  In
  * addition, Licensee may not authorize further sublicense of source of any
  * portion of the Covered Code, and must include terms to the effect that the
  * license from Licensee to its licensee is limited to the intellectual
  * property embodied in the software Licensee provides to its licensee, and
  * not to intellectual property embodied in modifications its licensee may
  * make.
  *
  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  * substantial portion of the Covered Code or modification must reproduce the
  * above Copyright Notice, and the following Disclaimer and Export Compliance
  * provision in the documentation and/or other materials provided with the
  * distribution.
  *
  * 3.4. Intel retains all right, title, and interest in and to the Original
  * Intel Code.
  *
  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  * Intel shall be used in advertising or otherwise to promote the sale, use or
  * other dealings in products derived from or relating to the Covered Code
  * without prior written authorization from Intel.
  *
  * 4. Disclaimer and Export Compliance
  *
  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  * PARTICULAR PURPOSE.
  *
  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
  * LIMITED REMEDY.
  *
  * 4.3. Licensee shall not export, either directly or indirectly, any of this
  * software or system incorporating such software without first obtaining any
  * required license or other approval from the U. S. Department of Commerce or
  * any other agency or department of the United States Government.  In the
  * event Licensee exports any such software from the United States or
  * re-exports any such software from a foreign destination, Licensee shall
  * ensure that the distribution and export/re-export of the software is in
  * compliance with all laws, regulations, orders, or other restrictions of the
  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
  * any of its subsidiaries will export/re-export any technical data, process,
  * software, or service, directly or indirectly, to any country for which the
  * United States government or any agency thereof requires an export license,
  * other governmental approval, or letter of assurance, without first obtaining
  * such license, approval or letter.
  *
  *****************************************************************************/
 
 #define __PSXFACE_C__
 
 #include "acpi.h"
 #include "accommon.h"
 #include "acparser.h"
 #include "acdispat.h"
 #include "acinterp.h"
 #include "amlcode.h"
 
 
 #define _COMPONENT          ACPI_PARSER
         ACPI_MODULE_NAME    ("psxface")
 
 /* Local Prototypes */
 
 static void
 AcpiPsStartTrace (
     ACPI_EVALUATE_INFO      *Info);
 
 static void
 AcpiPsStopTrace (
     ACPI_EVALUATE_INFO      *Info);
 
 static void
 AcpiPsUpdateParameterList (
     ACPI_EVALUATE_INFO      *Info,
     UINT16                  Action);
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiDebugTrace
  *
  * PARAMETERS:  MethodName      - Valid ACPI name string
  *              DebugLevel      - Optional level mask. 0 to use default
  *              DebugLayer      - Optional layer mask. 0 to use default
  *              Flags           - bit 1: one shot(1) or persistent(0)
  *
  * RETURN:      Status
  *
  * DESCRIPTION: External interface to enable debug tracing during control
  *              method execution
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiDebugTrace (
     char                    *Name,
     UINT32                  DebugLevel,
     UINT32                  DebugLayer,
     UINT32                  Flags)
 {
     ACPI_STATUS             Status;
 
 
     Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
     if (ACPI_FAILURE (Status))
     {
         return (Status);
     }
 
     /* TBDs: Validate name, allow full path or just nameseg */
 
     AcpiGbl_TraceMethodName = *ACPI_CAST_PTR (UINT32, Name);
     AcpiGbl_TraceFlags = Flags;
 
     if (DebugLevel)
     {
         AcpiGbl_TraceDbgLevel = DebugLevel;
     }
     if (DebugLayer)
     {
         AcpiGbl_TraceDbgLayer = DebugLayer;
     }
 
     (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
     return (AE_OK);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiPsStartTrace
  *
  * PARAMETERS:  Info        - Method info struct
  *
  * RETURN:      None
  *
  * DESCRIPTION: Start control method execution trace
  *
  ******************************************************************************/
 
 static void
 AcpiPsStartTrace (
     ACPI_EVALUATE_INFO      *Info)
 {
     ACPI_STATUS             Status;
 
 
     ACPI_FUNCTION_ENTRY ();
 
 
     Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
     if (ACPI_FAILURE (Status))
     {
         return;
     }
 
     if ((!AcpiGbl_TraceMethodName) ||
         (AcpiGbl_TraceMethodName != Info->ResolvedNode->Name.Integer))
     {
         goto Exit;
     }
 
     AcpiGbl_OriginalDbgLevel = AcpiDbgLevel;
     AcpiGbl_OriginalDbgLayer = AcpiDbgLayer;
 
     AcpiDbgLevel = 0x00FFFFFF;
     AcpiDbgLayer = ACPI_UINT32_MAX;
 
     if (AcpiGbl_TraceDbgLevel)
     {
         AcpiDbgLevel = AcpiGbl_TraceDbgLevel;
     }
     if (AcpiGbl_TraceDbgLayer)
     {
         AcpiDbgLayer = AcpiGbl_TraceDbgLayer;
     }
 
 
 Exit:
     (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiPsStopTrace
  *
  * PARAMETERS:  Info        - Method info struct
  *
  * RETURN:      None
  *
  * DESCRIPTION: Stop control method execution trace
  *
  ******************************************************************************/
 
 static void
 AcpiPsStopTrace (
     ACPI_EVALUATE_INFO      *Info)
 {
     ACPI_STATUS             Status;
 
 
     ACPI_FUNCTION_ENTRY ();
 
 
     Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
     if (ACPI_FAILURE (Status))
     {
         return;
     }
 
     if ((!AcpiGbl_TraceMethodName) ||
         (AcpiGbl_TraceMethodName != Info->ResolvedNode->Name.Integer))
     {
         goto Exit;
     }
 
     /* Disable further tracing if type is one-shot */
 
     if (AcpiGbl_TraceFlags & 1)
     {
         AcpiGbl_TraceMethodName = 0;
         AcpiGbl_TraceDbgLevel = 0;
         AcpiGbl_TraceDbgLayer = 0;
     }
 
     AcpiDbgLevel = AcpiGbl_OriginalDbgLevel;
     AcpiDbgLayer = AcpiGbl_OriginalDbgLayer;
 
 Exit:
     (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiPsExecuteMethod
  *
  * PARAMETERS:  Info            - Method info block, contains:
  *                  Node            - Method Node to execute
  *                  ObjDesc         - Method object
  *                  Parameters      - List of parameters to pass to the method,
  *                                    terminated by NULL. Params itself may be
  *                                    NULL if no parameters are being passed.
  *                  ReturnObject    - Where to put method's return value (if
  *                                    any). If NULL, no value is returned.
  *                  ParameterType   - Type of Parameter list
  *                  ReturnObject    - Where to put method's return value (if
  *                                    any). If NULL, no value is returned.
  *                  PassNumber      - Parse or execute pass
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Execute a control method
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiPsExecuteMethod (
     ACPI_EVALUATE_INFO      *Info)
 {
     ACPI_STATUS             Status;
     ACPI_PARSE_OBJECT       *Op;
     ACPI_WALK_STATE         *WalkState;
 
 
     ACPI_FUNCTION_TRACE (PsExecuteMethod);
 
 
     /* Validate the Info and method Node */
 
     if (!Info || !Info->ResolvedNode)
     {
         return_ACPI_STATUS (AE_NULL_ENTRY);
     }
 
     /* Init for new method, wait on concurrency semaphore */
 
     Status = AcpiDsBeginMethodExecution (Info->ResolvedNode, Info->ObjDesc, NULL);
     if (ACPI_FAILURE (Status))
     {
         return_ACPI_STATUS (Status);
     }
 
     /*
      * The caller "owns" the parameters, so give each one an extra reference
      */
     AcpiPsUpdateParameterList (Info, REF_INCREMENT);
 
     /* Begin tracing if requested */
 
     AcpiPsStartTrace (Info);
 
     /*
      * Execute the method. Performs parse simultaneously
      */
     ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
         "**** Begin Method Parse/Execute [%4.4s] **** Node=%p Obj=%p\n",
         Info->ResolvedNode->Name.Ascii, Info->ResolvedNode, Info->ObjDesc));
 
     /* Create and init a Root Node */
 
     Op = AcpiPsCreateScopeOp ();
     if (!Op)
     {
         Status = AE_NO_MEMORY;
         goto Cleanup;
     }
 
     /* Create and initialize a new walk state */
 
     Info->PassNumber = ACPI_IMODE_EXECUTE;
     WalkState = AcpiDsCreateWalkState (
                     Info->ObjDesc->Method.OwnerId, NULL, NULL, NULL);
     if (!WalkState)
     {
         Status = AE_NO_MEMORY;
         goto Cleanup;
     }
 
     Status = AcpiDsInitAmlWalk (WalkState, Op, Info->ResolvedNode,
                 Info->ObjDesc->Method.AmlStart,
                 Info->ObjDesc->Method.AmlLength, Info, Info->PassNumber);
     if (ACPI_FAILURE (Status))
     {
         AcpiDsDeleteWalkState (WalkState);
         goto Cleanup;
     }
 
     /* Invoke an internal method if necessary */
 
     if (Info->ObjDesc->Method.MethodFlags & AML_METHOD_INTERNAL_ONLY)
     {
         Status = Info->ObjDesc->Method.Implementation (WalkState);
         Info->ReturnObject = WalkState->ReturnDesc;
 
         /* Cleanup states */
 
         AcpiDsScopeStackClear (WalkState);
         AcpiPsCleanupScope (&WalkState->ParserState);
         AcpiDsTerminateControlMethod (WalkState->MethodDesc, WalkState);
         AcpiDsDeleteWalkState (WalkState);
         goto Cleanup;
     }
 
     /*
      * Start method evaluation with an implicit return of zero. This is done
      * for Windows compatibility.
      */
     if (AcpiGbl_EnableInterpreterSlack)
     {
         WalkState->ImplicitReturnObj =
             AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
         if (!WalkState->ImplicitReturnObj)
         {
             Status = AE_NO_MEMORY;
             AcpiDsDeleteWalkState (WalkState);
             goto Cleanup;
         }
 
         WalkState->ImplicitReturnObj->Integer.Value = 0;
     }
 
     /* Parse the AML */
 
     Status = AcpiPsParseAml (WalkState);
 
     /* WalkState was deleted by ParseAml */
 
 Cleanup:
     AcpiPsDeleteParseTree (Op);
 
     /* End optional tracing */
 
     AcpiPsStopTrace (Info);
 
     /* Take away the extra reference that we gave the parameters above */
 
     AcpiPsUpdateParameterList (Info, REF_DECREMENT);
 
     /* Exit now if error above */
 
     if (ACPI_FAILURE (Status))
     {
         return_ACPI_STATUS (Status);
     }
 
     /*
      * If the method has returned an object, signal this to the caller with
      * a control exception code
      */
     if (Info->ReturnObject)
     {
         ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Method returned ObjDesc=%p\n",
             Info->ReturnObject));
         ACPI_DUMP_STACK_ENTRY (Info->ReturnObject);
 
         Status = AE_CTRL_RETURN_VALUE;
     }
 
     return_ACPI_STATUS (Status);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiPsUpdateParameterList
  *
  * PARAMETERS:  Info            - See ACPI_EVALUATE_INFO
  *                                (Used: ParameterType and Parameters)
  *              Action          - Add or Remove reference
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Update reference count on all method parameter objects
  *
  ******************************************************************************/
 
 static void
 AcpiPsUpdateParameterList (
     ACPI_EVALUATE_INFO      *Info,
     UINT16                  Action)
 {
     UINT32                  i;
 
 
     if (Info->Parameters)
     {
         /* Update reference count for each parameter */
 
         for (i = 0; Info->Parameters[i]; i++)
         {
             /* Ignore errors, just do them all */
 
             (void) AcpiUtUpdateObjectReference (Info->Parameters[i], Action);
         }
     }
 }