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 /******************************************************************************
  *
  * Module Name: nsparse - namespace interface to AML parser
  *
  *****************************************************************************/
 
 /******************************************************************************
  *
  * 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 __NSPARSE_C__
 
 #include "acpi.h"
 #include "accommon.h"
 #include "acnamesp.h"
 #include "acparser.h"
 #include "acdispat.h"
 #include "actables.h"
 
 
 #define _COMPONENT          ACPI_NAMESPACE
         ACPI_MODULE_NAME    ("nsparse")
 
 
 /*******************************************************************************
  *
  * FUNCTION:    NsOneCompleteParse
  *
  * PARAMETERS:  PassNumber              - 1 or 2
  *              TableDesc               - The table to be parsed.
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Perform one complete parse of an ACPI/AML table.
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiNsOneCompleteParse (
     UINT32                  PassNumber,
     UINT32                  TableIndex,
     ACPI_NAMESPACE_NODE     *StartNode)
 {
     ACPI_PARSE_OBJECT       *ParseRoot;
     ACPI_STATUS             Status;
     UINT32                  AmlLength;
     UINT8                   *AmlStart;
     ACPI_WALK_STATE         *WalkState;
     ACPI_TABLE_HEADER       *Table;
     ACPI_OWNER_ID           OwnerId;
 
 
     ACPI_FUNCTION_TRACE (NsOneCompleteParse);
 
 
     Status = AcpiTbGetOwnerId (TableIndex, &OwnerId);
     if (ACPI_FAILURE (Status))
     {
         return_ACPI_STATUS (Status);
     }
 
     /* Create and init a Root Node */
 
     ParseRoot = AcpiPsCreateScopeOp ();
     if (!ParseRoot)
     {
         return_ACPI_STATUS (AE_NO_MEMORY);
     }
 
     /* Create and initialize a new walk state */
 
     WalkState = AcpiDsCreateWalkState (OwnerId, NULL, NULL, NULL);
     if (!WalkState)
     {
         AcpiPsFreeOp (ParseRoot);
         return_ACPI_STATUS (AE_NO_MEMORY);
     }
 
     Status = AcpiGetTableByIndex (TableIndex, &Table);
     if (ACPI_FAILURE (Status))
     {
         AcpiDsDeleteWalkState (WalkState);
         AcpiPsFreeOp (ParseRoot);
         return_ACPI_STATUS (Status);
     }
 
     /* Table must consist of at least a complete header */
 
     if (Table->Length < sizeof (ACPI_TABLE_HEADER))
     {
         Status = AE_BAD_HEADER;
     }
     else
     {
         AmlStart = (UINT8 *) Table + sizeof (ACPI_TABLE_HEADER);
         AmlLength = Table->Length - sizeof (ACPI_TABLE_HEADER);
         Status = AcpiDsInitAmlWalk (WalkState, ParseRoot, NULL,
                     AmlStart, AmlLength, NULL, (UINT8) PassNumber);
     }
 
     if (ACPI_FAILURE (Status))
     {
         AcpiDsDeleteWalkState (WalkState);
         goto Cleanup;
     }
 
     /* StartNode is the default location to load the table  */
 
     if (StartNode && StartNode != AcpiGbl_RootNode)
     {
         Status = AcpiDsScopeStackPush (StartNode, ACPI_TYPE_METHOD, WalkState);
         if (ACPI_FAILURE (Status))
         {
             AcpiDsDeleteWalkState (WalkState);
             goto Cleanup;
         }
     }
 
     /* Parse the AML */
 
     ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "*PARSE* pass %d parse\n", PassNumber));
     Status = AcpiPsParseAml (WalkState);
 
 Cleanup:
     AcpiPsDeleteParseTree (ParseRoot);
     return_ACPI_STATUS (Status);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiNsParseTable
  *
  * PARAMETERS:  TableDesc       - An ACPI table descriptor for table to parse
  *              StartNode       - Where to enter the table into the namespace
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Parse AML within an ACPI table and return a tree of ops
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiNsParseTable (
     UINT32                  TableIndex,
     ACPI_NAMESPACE_NODE     *StartNode)
 {
     ACPI_STATUS             Status;
 
 
     ACPI_FUNCTION_TRACE (NsParseTable);
 
 
     /*
      * AML Parse, pass 1
      *
      * In this pass, we load most of the namespace.  Control methods
      * are not parsed until later.  A parse tree is not created.  Instead,
      * each Parser Op subtree is deleted when it is finished.  This saves
      * a great deal of memory, and allows a small cache of parse objects
      * to service the entire parse.  The second pass of the parse then
      * performs another complete parse of the AML.
      */
     ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "**** Start pass 1\n"));
     Status = AcpiNsOneCompleteParse (ACPI_IMODE_LOAD_PASS1,
                 TableIndex, StartNode);
     if (ACPI_FAILURE (Status))
     {
         return_ACPI_STATUS (Status);
     }
 
     /*
      * AML Parse, pass 2
      *
      * In this pass, we resolve forward references and other things
      * that could not be completed during the first pass.
      * Another complete parse of the AML is performed, but the
      * overhead of this is compensated for by the fact that the
      * parse objects are all cached.
      */
     ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "**** Start pass 2\n"));
     Status = AcpiNsOneCompleteParse (ACPI_IMODE_LOAD_PASS2,
                 TableIndex, StartNode);
     if (ACPI_FAILURE (Status))
     {
         return_ACPI_STATUS (Status);
     }
 
     return_ACPI_STATUS (Status);
 }