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/******************************************************************************

 *

 * Module Name: adwalk - Application-level disassembler parse tree walk routines

 *

 *****************************************************************************/

/******************************************************************************

 *

 * 1. Copyright Notice

 *

 * Some or all of this work - Copyright (c) 1999 - 2010, 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.

 *

 *****************************************************************************/

#include "acpi.h"

#include "accommon.h"

#include "acparser.h"

#include "amlcode.h"

#include "acdisasm.h"

#include "acdispat.h"

#include "acnamesp.h"

#include "acapps.h"

#define _COMPONENT          ACPI_TOOLS

        ACPI_MODULE_NAME    ("adwalk")

/*

 * aslmap - opcode mappings and reserved method names

 */

ACPI_OBJECT_TYPE

AslMapNamedOpcodeToDataType (

    UINT16                  Opcode);

/* Local prototypes */

static ACPI_STATUS

AcpiDmFindOrphanDescending (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  Level,

    void                    *Context);

static ACPI_STATUS

AcpiDmDumpDescending (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  Level,

    void                    *Context);

static ACPI_STATUS

AcpiDmXrefDescendingOp (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  Level,

    void                    *Context);

static ACPI_STATUS

AcpiDmCommonAscendingOp (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  Level,

    void                    *Context);

static ACPI_STATUS

AcpiDmLoadDescendingOp (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  Level,

    void                    *Context);

static UINT32

AcpiDmInspectPossibleArgs (

    UINT32                  CurrentOpArgCount,

    UINT32                  TargetCount,

    ACPI_PARSE_OBJECT       *Op);

static ACPI_STATUS

AcpiDmResourceDescendingOp (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  Level,

    void                    *Context);

/*******************************************************************************

 *

 * FUNCTION:    AcpiDmDumpTree

 *

 * PARAMETERS:  Origin              - Starting object

 *

 * RETURN:      None

 *

 * DESCRIPTION: Parse tree walk to format and output the nodes

 *

 ******************************************************************************/

void

AcpiDmDumpTree (

    ACPI_PARSE_OBJECT       *Origin)

{

    ACPI_OP_WALK_INFO       Info;

    if (!Origin)

    {

        return;

    }

    AcpiOsPrintf ("/*\nAML Parse Tree\n\n");

    Info.Flags = 0;

    Info.Count = 0;

    Info.Level = 0;

    Info.WalkState = NULL;

    AcpiDmWalkParseTree (Origin, AcpiDmDumpDescending, NULL, &Info);

    AcpiOsPrintf ("*/\n\n");

}

/*******************************************************************************

 *

 * FUNCTION:    AcpiDmFindOrphanMethods

 *

 * PARAMETERS:  Origin              - Starting object

 *

 * RETURN:      None

 *

 * DESCRIPTION: Parse tree walk to find "orphaned" method invocations -- methods

 *              that are not resolved in the namespace

 *

 ******************************************************************************/

void

AcpiDmFindOrphanMethods (

    ACPI_PARSE_OBJECT       *Origin)

{

    ACPI_OP_WALK_INFO       Info;

    if (!Origin)

    {

        return;

    }

    Info.Flags = 0;

    Info.Level = 0;

    Info.WalkState = NULL;

    AcpiDmWalkParseTree (Origin, AcpiDmFindOrphanDescending, NULL, &Info);

}

/*******************************************************************************

 *

 * FUNCTION:    AcpiDmFinishNamespaceLoad

 *

 * PARAMETERS:  ParseTreeRoot       - Root of the parse tree

 *              NamespaceRoot       - Root of the internal namespace

 *              OwnerId             - OwnerId of the table to be disassembled

 *

 * RETURN:      None

 *

 * DESCRIPTION: Load all namespace items that are created within control

 *              methods. Used before namespace cross reference

 *

 ******************************************************************************/

void

AcpiDmFinishNamespaceLoad (

    ACPI_PARSE_OBJECT       *ParseTreeRoot,

    ACPI_NAMESPACE_NODE     *NamespaceRoot,

    ACPI_OWNER_ID           OwnerId)

{

    ACPI_STATUS             Status;

    ACPI_OP_WALK_INFO       Info;

    ACPI_WALK_STATE         *WalkState;

    if (!ParseTreeRoot)

    {

        return;

    }

    /* Create and initialize a new walk state */

    WalkState = AcpiDsCreateWalkState (OwnerId, ParseTreeRoot, NULL, NULL);

    if (!WalkState)

    {

        return;

    }

    Status = AcpiDsScopeStackPush (NamespaceRoot, NamespaceRoot->Type, WalkState);

    if (ACPI_FAILURE (Status))

    {

        return;

    }

    Info.Flags = 0;

    Info.Level = 0;

    Info.WalkState = WalkState;

    AcpiDmWalkParseTree (ParseTreeRoot, AcpiDmLoadDescendingOp,

        AcpiDmCommonAscendingOp, &Info);

    ACPI_FREE (WalkState);

}

/*******************************************************************************

 *

 * FUNCTION:    AcpiDmCrossReferenceNamespace

 *

 * PARAMETERS:  ParseTreeRoot       - Root of the parse tree

 *              NamespaceRoot       - Root of the internal namespace

 *              OwnerId             - OwnerId of the table to be disassembled

 *

 * RETURN:      None

 *

 * DESCRIPTION: Cross reference the namespace to create externals

 *

 ******************************************************************************/

void

AcpiDmCrossReferenceNamespace (

    ACPI_PARSE_OBJECT       *ParseTreeRoot,

    ACPI_NAMESPACE_NODE     *NamespaceRoot,

    ACPI_OWNER_ID           OwnerId)

{

    ACPI_STATUS             Status;

    ACPI_OP_WALK_INFO       Info;

    ACPI_WALK_STATE         *WalkState;

    if (!ParseTreeRoot)

    {

        return;

    }

    /* Create and initialize a new walk state */

    WalkState = AcpiDsCreateWalkState (OwnerId, ParseTreeRoot, NULL, NULL);

    if (!WalkState)

    {

        return;

    }

    Status = AcpiDsScopeStackPush (NamespaceRoot, NamespaceRoot->Type, WalkState);

    if (ACPI_FAILURE (Status))

    {

        return;

    }

    Info.Flags = 0;

    Info.Level = 0;

    Info.WalkState = WalkState;

    AcpiDmWalkParseTree (ParseTreeRoot, AcpiDmXrefDescendingOp,

        AcpiDmCommonAscendingOp, &Info);

    ACPI_FREE (WalkState);

}

/*******************************************************************************

 *

 * FUNCTION:    AcpiDmConvertResourceIndexes

 *

 * PARAMETERS:  ParseTreeRoot       - Root of the parse tree

 *              NamespaceRoot       - Root of the internal namespace

 *

 * RETURN:      None

 *

 * DESCRIPTION: Convert fixed-offset references to resource descriptors to

 *              symbolic references. Should only be called after namespace has

 *              been cross referenced.

 *

 ******************************************************************************/

void

AcpiDmConvertResourceIndexes (

    ACPI_PARSE_OBJECT       *ParseTreeRoot,

    ACPI_NAMESPACE_NODE     *NamespaceRoot)

{

    ACPI_STATUS             Status;

    ACPI_OP_WALK_INFO       Info;

    ACPI_WALK_STATE         *WalkState;

    if (!ParseTreeRoot)

    {

        return;

    }

    /* Create and initialize a new walk state */

    WalkState = AcpiDsCreateWalkState (0, ParseTreeRoot, NULL, NULL);

    if (!WalkState)

    {

        return;

    }

    Status = AcpiDsScopeStackPush (NamespaceRoot, NamespaceRoot->Type, WalkState);

    if (ACPI_FAILURE (Status))

    {

        return;

    }

    Info.Flags = 0;

    Info.Level = 0;

    Info.WalkState = WalkState;

    AcpiDmWalkParseTree (ParseTreeRoot, AcpiDmResourceDescendingOp,

        AcpiDmCommonAscendingOp, &Info);

    ACPI_FREE (WalkState);

    return;

}

/*******************************************************************************

 *

 * FUNCTION:    AcpiDmDumpDescending

 *

 * PARAMETERS:  ASL_WALK_CALLBACK

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Format and print contents of one parse Op.

 *

 ******************************************************************************/

static ACPI_STATUS

AcpiDmDumpDescending (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  Level,

    void                    *Context)

{

    ACPI_OP_WALK_INFO       *Info = Context;

    char                    *Path;

    if (!Op)

    {

        return (AE_OK);

    }

    /* Most of the information (count, level, name) here */

    Info->Count++;

    AcpiOsPrintf ("% 5d [%2.2d] ", Info->Count, Level);

    AcpiDmIndent (Level);

    AcpiOsPrintf ("%-28s", AcpiPsGetOpcodeName (Op->Common.AmlOpcode));

    /* Extra info is helpful */

    switch (Op->Common.AmlOpcode)

    {

    case AML_BYTE_OP:

    case AML_WORD_OP:

    case AML_DWORD_OP:

        AcpiOsPrintf ("%X", (UINT32) Op->Common.Value.Integer);

        break;

    case AML_INT_NAMEPATH_OP:

        if (Op->Common.Value.String)

        {

            AcpiNsExternalizeName (ACPI_UINT32_MAX, Op->Common.Value.String,

                            NULL, &Path);

            AcpiOsPrintf ("%s %p", Path, Op->Common.Node);

            ACPI_FREE (Path);

        }

        else

        {

            AcpiOsPrintf ("[NULL]");

        }

        break;

    case AML_NAME_OP:

    case AML_METHOD_OP:

    case AML_DEVICE_OP:

    case AML_INT_NAMEDFIELD_OP:

        AcpiOsPrintf ("%4.4s", ACPI_CAST_PTR (char, &Op->Named.Name));

        break;

    default:

        break;

    }

    AcpiOsPrintf ("\n");

    return (AE_OK);

}

/*******************************************************************************

 *

 * FUNCTION:    AcpiDmFindOrphanDescending

 *

 * PARAMETERS:  ASL_WALK_CALLBACK

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Check namepath Ops for orphaned method invocations

 *

 * Note: Experimental.

 *

 ******************************************************************************/

static ACPI_STATUS

AcpiDmFindOrphanDescending (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  Level,

    void                    *Context)

{

    const ACPI_OPCODE_INFO  *OpInfo;

    ACPI_PARSE_OBJECT       *ChildOp;

    ACPI_PARSE_OBJECT       *NextOp;

    ACPI_PARSE_OBJECT       *ParentOp;

    UINT32                  ArgCount;

    if (!Op)

    {

        return (AE_OK);

    }

    OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);

    switch (Op->Common.AmlOpcode)

    {

#ifdef ACPI_UNDER_DEVELOPMENT

    case AML_ADD_OP:

        ChildOp = Op->Common.Value.Arg;

        if ((ChildOp->Common.AmlOpcode == AML_INT_NAMEPATH_OP) &&

            !ChildOp->Common.Node)

        {

            AcpiNsExternalizeName (ACPI_UINT32_MAX, ChildOp->Common.Value.String,

                            NULL, &Path);

            AcpiOsPrintf ("/* %-16s A-NAMEPATH: %s  */\n", Op->Common.AmlOpName, Path);

            ACPI_FREE (Path);

            NextOp = Op->Common.Next;

            if (!NextOp)

            {

                /* This NamePath has no args, assume it is an integer */

                AcpiDmAddToExternalList (ChildOp, ChildOp->Common.Value.String, ACPI_TYPE_INTEGER, 0);

                return (AE_OK);

            }

            ArgCount = AcpiDmInspectPossibleArgs (3, 1, NextOp);

            AcpiOsPrintf ("/* A-CHILDREN: %u Actual %u */\n", ArgCount, AcpiDmCountChildren (Op));

            if (ArgCount < 1)

            {

                /* One Arg means this is just a Store(Name,Target) */

                AcpiDmAddToExternalList (ChildOp, ChildOp->Common.Value.String, ACPI_TYPE_INTEGER, 0);

                return (AE_OK);

            }

            AcpiDmAddToExternalList (ChildOp, ChildOp->Common.Value.String, ACPI_TYPE_METHOD, ArgCount);

        }

        break;

#endif

    case AML_STORE_OP:

        ChildOp = Op->Common.Value.Arg;

        if ((ChildOp->Common.AmlOpcode == AML_INT_NAMEPATH_OP) &&

            !ChildOp->Common.Node)

        {

            NextOp = Op->Common.Next;

            if (!NextOp)

            {

                /* This NamePath has no args, assume it is an integer */

                AcpiDmAddToExternalList (ChildOp, ChildOp->Common.Value.String, ACPI_TYPE_INTEGER, 0);

                return (AE_OK);

            }

            ArgCount = AcpiDmInspectPossibleArgs (2, 1, NextOp);

            if (ArgCount <= 1)

            {

                /* One Arg means this is just a Store(Name,Target) */

                AcpiDmAddToExternalList (ChildOp, ChildOp->Common.Value.String, ACPI_TYPE_INTEGER, 0);

                return (AE_OK);

            }

            AcpiDmAddToExternalList (ChildOp, ChildOp->Common.Value.String, ACPI_TYPE_METHOD, ArgCount);

        }

        break;

    case AML_INT_NAMEPATH_OP:

        /* Must examine parent to see if this namepath is an argument */

        ParentOp = Op->Common.Parent;

        OpInfo = AcpiPsGetOpcodeInfo (ParentOp->Common.AmlOpcode);

        if ((OpInfo->Class != AML_CLASS_EXECUTE) &&

            (OpInfo->Class != AML_CLASS_CREATE) &&

            (ParentOp->Common.AmlOpcode != AML_INT_METHODCALL_OP) &&

            !Op->Common.Node)

        {

            ArgCount = AcpiDmInspectPossibleArgs (0, 0, Op->Common.Next);

            /*

             * Check if namepath is a predicate for if/while or lone parameter to

             * a return.

             */

            if (ArgCount == 0)

            {

                if (((ParentOp->Common.AmlOpcode == AML_IF_OP) ||

                     (ParentOp->Common.AmlOpcode == AML_WHILE_OP) ||

                     (ParentOp->Common.AmlOpcode == AML_RETURN_OP)) &&

                     /* And namepath is the first argument */

                     (ParentOp->Common.Value.Arg == Op))

                {

                    AcpiDmAddToExternalList (Op, Op->Common.Value.String, ACPI_TYPE_INTEGER, 0);

                    break;

                }

            }

            /*

             * This is a standalone namestring (not a parameter to another

             * operator) - it *must* be a method invocation, nothing else is

             * grammatically possible.

             */

            AcpiDmAddToExternalList (Op, Op->Common.Value.String, ACPI_TYPE_METHOD, ArgCount);

        }

        break;

    default:

        break;

    }

    return (AE_OK);

}

/*******************************************************************************

 *

 * FUNCTION:    AcpiDmLoadDescendingOp

 *

 * PARAMETERS:  ASL_WALK_CALLBACK

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Descending handler for namespace control method object load

 *

 ******************************************************************************/

static ACPI_STATUS

AcpiDmLoadDescendingOp (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  Level,

    void                    *Context)

{

    ACPI_OP_WALK_INFO       *Info = Context;

    const ACPI_OPCODE_INFO  *OpInfo;

    ACPI_WALK_STATE         *WalkState;

    ACPI_OBJECT_TYPE        ObjectType;

    ACPI_STATUS             Status;

    char                    *Path = NULL;

    ACPI_PARSE_OBJECT       *NextOp;

    ACPI_NAMESPACE_NODE     *Node;

    char                    FieldPath[5];

    BOOLEAN                 PreDefined = FALSE;

    UINT8                   PreDefineIndex = 0;

    WalkState = Info->WalkState;

    OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);

    ObjectType = OpInfo->ObjectType;

    ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);

    /* Only interested in operators that create new names */

    if (!(OpInfo->Flags & AML_NAMED) &&

        !(OpInfo->Flags & AML_CREATE))

    {

        goto Exit;

    }

    /* Get the NamePath from the appropriate place */

    if (OpInfo->Flags & AML_NAMED)

    {

        /* For all named operators, get the new name */

        Path = (char *) Op->Named.Path;

        if (!Path && Op->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP)

        {

            *ACPI_CAST_PTR (UINT32, &FieldPath[0]) = Op->Named.Name;

            FieldPath[4] = 0;

            Path = FieldPath;

        }

    }

    else if (OpInfo->Flags & AML_CREATE)

    {

        /* New name is the last child */

        NextOp = Op->Common.Value.Arg;

        while (NextOp->Common.Next)

        {

            NextOp = NextOp->Common.Next;

        }

        Path = NextOp->Common.Value.String;

    }

    if (!Path)

    {

        goto Exit;

    }

    /* Insert the name into the namespace */

    Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,

                ACPI_IMODE_LOAD_PASS2, ACPI_NS_DONT_OPEN_SCOPE,

                WalkState, &Node);

    Op->Common.Node = Node;

    if (ACPI_SUCCESS (Status))

    {

        /* Check if it's a predefined node */

        while (AcpiGbl_PreDefinedNames[PreDefineIndex].Name)

        {

            if (!ACPI_STRNCMP (Node->Name.Ascii,

                AcpiGbl_PreDefinedNames[PreDefineIndex].Name, 4))

            {

                PreDefined = TRUE;

                break;

            }

            PreDefineIndex++;

        }

        /*

         * Set node owner id if it satisfies all the following conditions:

         * 1) Not a predefined node, _SB_ etc

         * 2) Not the root node

         * 3) Not a node created by Scope

         */

        if (!PreDefined && Node != AcpiGbl_RootNode &&

            Op->Common.AmlOpcode != AML_SCOPE_OP)

        {

            Node->OwnerId = WalkState->OwnerId;

        }

    }

Exit:

    if (AcpiNsOpensScope (ObjectType))

    {

        if (Op->Common.Node)

        {

            Status = AcpiDsScopeStackPush (Op->Common.Node, ObjectType, WalkState);

            if (ACPI_FAILURE (Status))

            {

                return (Status);

            }

        }

    }

    return (AE_OK);

}

/*******************************************************************************

 *

 * FUNCTION:    AcpiDmXrefDescendingOp

 *

 * PARAMETERS:  ASL_WALK_CALLBACK

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Descending handler for namespace cross reference

 *

 ******************************************************************************/

static ACPI_STATUS

AcpiDmXrefDescendingOp (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  Level,

    void                    *Context)

{

    ACPI_OP_WALK_INFO       *Info = Context;

    const ACPI_OPCODE_INFO  *OpInfo;

    ACPI_WALK_STATE         *WalkState;

    ACPI_OBJECT_TYPE        ObjectType;

    ACPI_OBJECT_TYPE        ObjectType2;

    ACPI_STATUS             Status;

    char                    *Path = NULL;

    ACPI_PARSE_OBJECT       *NextOp;

    ACPI_NAMESPACE_NODE     *Node;

    ACPI_OPERAND_OBJECT     *Object;

    WalkState = Info->WalkState;

    OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);

    ObjectType = OpInfo->ObjectType;

    ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);

    if ((!(OpInfo->Flags & AML_NAMED)) &&

        (!(OpInfo->Flags & AML_CREATE)) &&

        (Op->Common.AmlOpcode != AML_INT_NAMEPATH_OP))

    {

        goto Exit;

    }

    /* Get the NamePath from the appropriate place */

    if (OpInfo->Flags & AML_NAMED)

    {

        if ((Op->Common.AmlOpcode == AML_ALIAS_OP) ||

            (Op->Common.AmlOpcode == AML_SCOPE_OP))

        {

            /*

             * Only these two operators refer to an existing name,

             * first argument

             */

            Path = (char *) Op->Named.Path;

        }

    }

    else if (OpInfo->Flags & AML_CREATE)

    {

        /* Referenced Buffer Name is the first child */

        NextOp = Op->Common.Value.Arg;

        if (NextOp->Common.AmlOpcode == AML_INT_NAMEPATH_OP)

        {

            Path = NextOp->Common.Value.String;

        }

    }

    else

    {

        Path = Op->Common.Value.String;

    }

    if (!Path)

    {

        goto Exit;

    }

    /*

     * Lookup the name in the namespace.  Name must exist at this point, or it

     * is an invalid reference.

     *

     * The namespace is also used as a lookup table for references to resource

     * descriptors and the fields within them.

     */

    Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_ANY,

                ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,

                WalkState, &Node);

    if (ACPI_FAILURE (Status))

    {

        if (Status == AE_NOT_FOUND)

        {

            AcpiDmAddToExternalList (Op, Path, (UINT8) ObjectType, 0);

            /*

             * We could install this into the namespace, but we catch duplicate

             * externals when they are added to the list.

             */

#if 0

            Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_ANY,

                       ACPI_IMODE_LOAD_PASS1, ACPI_NS_DONT_OPEN_SCOPE,

                       WalkState, &Node);

#endif

        }

    }

    /*

     * Found the node in external table, add it to external list

     * Node->OwnerId == 0 indicates built-in ACPI Names, _OS_ etc

     */

    else if (Node->OwnerId && WalkState->OwnerId != Node->OwnerId)

    {

        ObjectType2 = ObjectType;

        Object = AcpiNsGetAttachedObject (Node);

        if (Object)

        {

            ObjectType2 = Object->Common.Type;

        }

        if (ObjectType2 == ACPI_TYPE_METHOD)

        {

            AcpiDmAddToExternalList (Op, Path, ACPI_TYPE_METHOD,

                Object->Method.ParamCount);

        }

        else

        {

            AcpiDmAddToExternalList (Op, Path, (UINT8) ObjectType2, 0);

        }

        Op->Common.Node = Node;

    }

    else

    {

        Op->Common.Node = Node;

    }

Exit:

    /* Open new scope if necessary */

    if (AcpiNsOpensScope (ObjectType))

    {

        if (Op->Common.Node)

        {

            Status = AcpiDsScopeStackPush (Op->Common.Node, ObjectType, WalkState);

            if (ACPI_FAILURE (Status))

            {

                return (Status);

            }

        }

    }

    return (AE_OK);

}

/*******************************************************************************

 *

 * FUNCTION:    AcpiDmResourceDescendingOp

 *

 * PARAMETERS:  ASL_WALK_CALLBACK

 *

 * RETURN:      None

 *

 * DESCRIPTION: Process one parse op during symbolic resource index conversion.

 *

 ******************************************************************************/

static ACPI_STATUS

AcpiDmResourceDescendingOp (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  Level,

    void                    *Context)

{

    ACPI_OP_WALK_INFO       *Info = Context;

    const ACPI_OPCODE_INFO  *OpInfo;

    ACPI_WALK_STATE         *WalkState;

    ACPI_OBJECT_TYPE        ObjectType;

    ACPI_STATUS             Status;

    WalkState = Info->WalkState;

    OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);

    /* Open new scope if necessary */

    ObjectType = OpInfo->ObjectType;

    if (AcpiNsOpensScope (ObjectType))

    {

        if (Op->Common.Node)

        {

            Status = AcpiDsScopeStackPush (Op->Common.Node, ObjectType, WalkState);

            if (ACPI_FAILURE (Status))

            {

                return (Status);

            }

        }

    }

    /*

     * Check if this operator contains a reference to a resource descriptor.

     * If so, convert the reference into a symbolic reference.

     */

    AcpiDmCheckResourceReference (Op, WalkState);

    return (AE_OK);

}

/*******************************************************************************

 *

 * FUNCTION:    AcpiDmCommonAscendingOp

 *

 * PARAMETERS:  ASL_WALK_CALLBACK

 *

 * RETURN:      None

 *

 * DESCRIPTION: Ascending handler for combined parse/namespace walks. Closes

 *              scope if necessary.

 *

 ******************************************************************************/

static ACPI_STATUS

AcpiDmCommonAscendingOp (

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  Level,

    void                    *Context)

{

    ACPI_OP_WALK_INFO       *Info = Context;

    const ACPI_OPCODE_INFO  *OpInfo;

    ACPI_OBJECT_TYPE        ObjectType;

    /* Close scope if necessary */

    OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);

    ObjectType = OpInfo->ObjectType;

    ObjectType = AslMapNamedOpcodeToDataType (Op->Asl.AmlOpcode);

    if (AcpiNsOpensScope (ObjectType))

    {

        (void) AcpiDsScopeStackPop (Info->WalkState);

    }

    return (AE_OK);

}

/*******************************************************************************

 *

 * FUNCTION:    AcpiDmInspectPossibleArgs

 *

 * PARAMETERS:  CurrentOpArgCount   - Which arg of the current op was the

 *                                    possible method invocation found

 *              TargetCount         - Number of targets (0,1,2) for this op

 *              Op                  - Parse op

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Examine following args and next ops for possible arguments

 *              for an unrecognized method invocation.

 *

 ******************************************************************************/

static UINT32

AcpiDmInspectPossibleArgs (

    UINT32                  CurrentOpArgCount,

    UINT32                  TargetCount,

    ACPI_PARSE_OBJECT       *Op)

{

    const ACPI_OPCODE_INFO  *OpInfo;

    UINT32                  i;

    UINT32                  Last = 0;

    UINT32                  Lookahead;

    Lookahead = (ACPI_METHOD_NUM_ARGS + TargetCount) - CurrentOpArgCount;

    /* Lookahead for the maximum number of possible arguments */

    for (i = 0; i < Lookahead; i++)

    {

        if (!Op)

        {

            break;

        }

        OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);

        /*

         * Any one of these operators is "very probably" not a method arg

         */

        if ((Op->Common.AmlOpcode == AML_STORE_OP) ||

            (Op->Common.AmlOpcode == AML_NOTIFY_OP))

        {

            break;

        }

        if ((OpInfo->Class != AML_CLASS_EXECUTE) &&

            (OpInfo->Class != AML_CLASS_CONTROL))

        {

            Last = i+1;

        }

        Op = Op->Common.Next;

    }

    return (Last);

}