743 lines
24 KiB
C
743 lines
24 KiB
C
/*******************************************************************************
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*
|
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* Module Name: nsaccess - Top-level functions for accessing ACPI namespace
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* $Revision: 119 $
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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
|
|
* 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.
|
|
* 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.
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|
*
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|
* 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.
|
|
*
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|
* 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.
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|
*
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|
* 3.4. Intel retains all right, title, and interest in and to the Original
|
|
* 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
|
|
* other dealings in products derived from or relating to the Covered Code
|
|
* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
|
|
*
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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,
|
|
* 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.
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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
|
|
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
|
|
* 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
|
|
* LIMITED REMEDY.
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*
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* 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
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|
* 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
|
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* such license, approval or letter.
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*
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*****************************************************************************/
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#define __NSACCESS_C__
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#include "acpi.h"
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#include "amlcode.h"
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#include "acinterp.h"
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#include "acnamesp.h"
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|
#include "acdispat.h"
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#define _COMPONENT NAMESPACE
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MODULE_NAME ("nsaccess")
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|
|
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|
/*******************************************************************************
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*
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|
* FUNCTION: AcpiNsRootInitialize
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|
*
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|
* PARAMETERS: None
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|
*
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|
* RETURN: Status
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*
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|
* DESCRIPTION: Allocate and initialize the default root named objects
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|
*
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* MUTEX: Locks namespace for entire execution
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|
*
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|
******************************************************************************/
|
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|
ACPI_STATUS
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|
AcpiNsRootInitialize (void)
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|
{
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|
ACPI_STATUS Status = AE_OK;
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|
PREDEFINED_NAMES *InitVal = NULL;
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ACPI_NAMESPACE_NODE *NewNode;
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ACPI_OPERAND_OBJECT *ObjDesc;
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|
|
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FUNCTION_TRACE ("NsRootInitialize");
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|
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|
AcpiCmAcquireMutex (ACPI_MTX_NAMESPACE);
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|
/*
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|
* The global root ptr is initially NULL, so a non-NULL value indicates
|
|
* that AcpiNsRootInitialize() has already been called; just return.
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|
*/
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|
|
|
if (AcpiGbl_RootNode)
|
|
{
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|
Status = AE_OK;
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|
goto UnlockAndExit;
|
|
}
|
|
|
|
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|
/*
|
|
* Tell the rest of the subsystem that the root is initialized
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* (This is OK because the namespace is locked)
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|
*/
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|
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AcpiGbl_RootNode = &AcpiGbl_RootNodeStruct;
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|
|
|
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/* Enter the pre-defined names in the name table */
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|
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|
DEBUG_PRINT (ACPI_INFO,
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|
("Entering predefined name table entries into namespace\n"));
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|
|
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for (InitVal = AcpiGbl_PreDefinedNames; InitVal->Name; InitVal++)
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|
{
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|
Status = AcpiNsLookup (NULL, InitVal->Name,
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(OBJECT_TYPE_INTERNAL) InitVal->Type,
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IMODE_LOAD_PASS2, NS_NO_UPSEARCH,
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NULL, &NewNode);
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if (ACPI_FAILURE (Status) || (!NewNode)) /* Must be on same line for code converter */
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{
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DEBUG_PRINT (ACPI_ERROR,
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|
("Could not create predefined name %s, %s\n",
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InitVal->Name, AcpiCmFormatException (Status)));
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}
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/*
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|
* Name entered successfully.
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* If entry in PreDefinedNames[] specifies an
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* initial value, create the initial value.
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*/
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|
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if (InitVal->Val)
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{
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/*
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* Entry requests an initial value, allocate a
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* descriptor for it.
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*/
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|
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ObjDesc = AcpiCmCreateInternalObject (
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(OBJECT_TYPE_INTERNAL) InitVal->Type);
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if (!ObjDesc)
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{
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Status = AE_NO_MEMORY;
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goto UnlockAndExit;
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}
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/*
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* Convert value string from table entry to
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* internal representation. Only types actually
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* used for initial values are implemented here.
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*/
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switch (InitVal->Type)
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{
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case ACPI_TYPE_INTEGER:
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ObjDesc->Integer.Value =
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(ACPI_INTEGER) STRTOUL (InitVal->Val, NULL, 10);
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break;
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|
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case ACPI_TYPE_STRING:
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|
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ObjDesc->String.Length =
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(UINT16) STRLEN (InitVal->Val);
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/*
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* Allocate a buffer for the string. All
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* String.Pointers must be allocated buffers!
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* (makes deletion simpler)
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*/
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ObjDesc->String.Pointer = AcpiCmAllocate (
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(ObjDesc->String.Length + 1));
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if (!ObjDesc->String.Pointer)
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{
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AcpiCmRemoveReference (ObjDesc);
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Status = AE_NO_MEMORY;
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goto UnlockAndExit;
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}
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STRCPY (ObjDesc->String.Pointer, InitVal->Val);
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break;
|
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|
|
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case ACPI_TYPE_MUTEX:
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ObjDesc->Mutex.SyncLevel =
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(UINT16) STRTOUL (InitVal->Val, NULL, 10);
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|
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if (STRCMP (InitVal->Name, "_GL_") == 0)
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{
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/*
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* Create a counting semaphore for the
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* global lock
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*/
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Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT,
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1, &ObjDesc->Mutex.Semaphore);
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|
|
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if (ACPI_FAILURE (Status))
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{
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goto UnlockAndExit;
|
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}
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/*
|
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* We just created the mutex for the
|
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* global lock, save it
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*/
|
|
|
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AcpiGbl_GlobalLockSemaphore = ObjDesc->Mutex.Semaphore;
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}
|
|
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|
else
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{
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/* Create a mutex */
|
|
|
|
Status = AcpiOsCreateSemaphore (1, 1,
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&ObjDesc->Mutex.Semaphore);
|
|
|
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if (ACPI_FAILURE (Status))
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{
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goto UnlockAndExit;
|
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}
|
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}
|
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break;
|
|
|
|
|
|
default:
|
|
REPORT_ERROR (("Unsupported initial type value %X\n",
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InitVal->Type));
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AcpiCmRemoveReference (ObjDesc);
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ObjDesc = NULL;
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continue;
|
|
}
|
|
|
|
/* Store pointer to value descriptor in the Node */
|
|
|
|
AcpiNsAttachObject (NewNode, ObjDesc,
|
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ObjDesc->Common.Type);
|
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}
|
|
}
|
|
|
|
|
|
UnlockAndExit:
|
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AcpiCmReleaseMutex (ACPI_MTX_NAMESPACE);
|
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return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiNsLookup
|
|
*
|
|
* PARAMETERS: PrefixNode - Search scope if name is not fully qualified
|
|
* Pathname - Search pathname, in internal format
|
|
* (as represented in the AML stream)
|
|
* Type - Type associated with name
|
|
* InterpreterMode - IMODE_LOAD_PASS2 => add name if not found
|
|
* Flags - Flags describing the search restrictions
|
|
* WalkState - Current state of the walk
|
|
* ReturnNode - Where the Node is placed (if found
|
|
* or created successfully)
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Find or enter the passed name in the name space.
|
|
* Log an error if name not found in Exec mode.
|
|
*
|
|
* MUTEX: Assumes namespace is locked.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiNsLookup (
|
|
ACPI_GENERIC_STATE *ScopeInfo,
|
|
NATIVE_CHAR *Pathname,
|
|
OBJECT_TYPE_INTERNAL Type,
|
|
OPERATING_MODE InterpreterMode,
|
|
UINT32 Flags,
|
|
ACPI_WALK_STATE *WalkState,
|
|
ACPI_NAMESPACE_NODE **ReturnNode)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_NAMESPACE_NODE *PrefixNode;
|
|
ACPI_NAMESPACE_NODE *CurrentNode = NULL;
|
|
ACPI_NAMESPACE_NODE *ScopeToPush = NULL;
|
|
ACPI_NAMESPACE_NODE *ThisNode = NULL;
|
|
UINT32 NumSegments;
|
|
ACPI_NAME SimpleName;
|
|
BOOLEAN NullNamePath = FALSE;
|
|
OBJECT_TYPE_INTERNAL TypeToCheckFor;
|
|
OBJECT_TYPE_INTERNAL ThisSearchType;
|
|
UINT32 LocalFlags = Flags & ~NS_ERROR_IF_FOUND;
|
|
|
|
DEBUG_EXEC (UINT32 i;)
|
|
|
|
|
|
FUNCTION_TRACE ("NsLookup");
|
|
|
|
|
|
if (!ReturnNode)
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
|
|
AcpiGbl_NsLookupCount++;
|
|
|
|
*ReturnNode = ENTRY_NOT_FOUND;
|
|
|
|
|
|
if (!AcpiGbl_RootNode)
|
|
{
|
|
return (AE_NO_NAMESPACE);
|
|
}
|
|
|
|
/*
|
|
* Get the prefix scope.
|
|
* A null scope means use the root scope
|
|
*/
|
|
|
|
if ((!ScopeInfo) ||
|
|
(!ScopeInfo->Scope.Node))
|
|
{
|
|
DEBUG_PRINT (TRACE_NAMES,
|
|
("NsLookup: Null scope prefix, using root node (%p)\n", AcpiGbl_RootNode));
|
|
|
|
PrefixNode = AcpiGbl_RootNode;
|
|
}
|
|
else
|
|
{
|
|
PrefixNode = ScopeInfo->Scope.Node;
|
|
}
|
|
|
|
|
|
/*
|
|
* This check is explicitly split provide relax the TypeToCheckFor
|
|
* conditions for BankFieldDefn. Originally, both BankFieldDefn and
|
|
* DefFieldDefn caused TypeToCheckFor to be set to ACPI_TYPE_REGION,
|
|
* but the BankFieldDefn may also check for a Field definition as well
|
|
* as an OperationRegion.
|
|
*/
|
|
|
|
if (INTERNAL_TYPE_DEF_FIELD_DEFN == Type)
|
|
{
|
|
/* DefFieldDefn defines fields in a Region */
|
|
|
|
TypeToCheckFor = ACPI_TYPE_REGION;
|
|
}
|
|
|
|
else if (INTERNAL_TYPE_BANK_FIELD_DEFN == Type)
|
|
{
|
|
/* BankFieldDefn defines data fields in a Field Object */
|
|
|
|
TypeToCheckFor = ACPI_TYPE_ANY;
|
|
}
|
|
|
|
else
|
|
{
|
|
TypeToCheckFor = Type;
|
|
}
|
|
|
|
|
|
/* TBD: [Restructure] - Move the pathname stuff into a new procedure */
|
|
|
|
/* Examine the name pointer */
|
|
|
|
if (!Pathname)
|
|
{
|
|
/* 8-12-98 ASL Grammar Update supports null NamePath */
|
|
|
|
NullNamePath = TRUE;
|
|
NumSegments = 0;
|
|
ThisNode = AcpiGbl_RootNode;
|
|
|
|
DEBUG_PRINT (TRACE_NAMES,
|
|
("NsLookup: Null Pathname (Zero segments), Flags=%x\n", Flags));
|
|
}
|
|
|
|
else
|
|
{
|
|
/*
|
|
* Valid name pointer (Internal name format)
|
|
*
|
|
* Check for prefixes. As represented in the AML stream, a
|
|
* Pathname consists of an optional scope prefix followed by
|
|
* a segment part.
|
|
*
|
|
* If present, the scope prefix is either a RootPrefix (in
|
|
* which case the name is fully qualified), or zero or more
|
|
* ParentPrefixes (in which case the name's scope is relative
|
|
* to the current scope).
|
|
*
|
|
* The segment part consists of either:
|
|
* - A single 4-byte name segment, or
|
|
* - A DualNamePrefix followed by two 4-byte name segments, or
|
|
* - A MultiNamePrefixOp, followed by a byte indicating the
|
|
* number of segments and the segments themselves.
|
|
*/
|
|
|
|
if (*Pathname == AML_ROOT_PREFIX)
|
|
{
|
|
/* Pathname is fully qualified, look in root name table */
|
|
|
|
CurrentNode = AcpiGbl_RootNode;
|
|
|
|
/* point to segment part */
|
|
|
|
Pathname++;
|
|
|
|
DEBUG_PRINT (TRACE_NAMES,
|
|
("NsLookup: Searching from root [%p]\n",
|
|
CurrentNode));
|
|
|
|
/* Direct reference to root, "\" */
|
|
|
|
if (!(*Pathname))
|
|
{
|
|
ThisNode = AcpiGbl_RootNode;
|
|
goto CheckForNewScopeAndExit;
|
|
}
|
|
}
|
|
|
|
else
|
|
{
|
|
/* Pathname is relative to current scope, start there */
|
|
|
|
CurrentNode = PrefixNode;
|
|
|
|
DEBUG_PRINT (TRACE_NAMES,
|
|
("NsLookup: Searching relative to pfx scope [%p]\n",
|
|
PrefixNode));
|
|
|
|
/*
|
|
* Handle up-prefix (carat). More than one prefix
|
|
* is supported
|
|
*/
|
|
|
|
while (*Pathname == AML_PARENT_PREFIX)
|
|
{
|
|
/* Point to segment part or next ParentPrefix */
|
|
|
|
Pathname++;
|
|
|
|
/* Backup to the parent's scope */
|
|
|
|
ThisNode = AcpiNsGetParentObject (CurrentNode);
|
|
if (!ThisNode)
|
|
{
|
|
/* Current scope has no parent scope */
|
|
|
|
REPORT_ERROR (("Too many parent prefixes (^) - reached root\n"));
|
|
return_ACPI_STATUS (AE_NOT_FOUND);
|
|
}
|
|
|
|
CurrentNode = ThisNode;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Examine the name prefix opcode, if any,
|
|
* to determine the number of segments
|
|
*/
|
|
|
|
if (*Pathname == AML_DUAL_NAME_PREFIX)
|
|
{
|
|
NumSegments = 2;
|
|
|
|
/* point to first segment */
|
|
|
|
Pathname++;
|
|
|
|
DEBUG_PRINT (TRACE_NAMES,
|
|
("NsLookup: Dual Pathname (2 segments, Flags=%X)\n", Flags));
|
|
}
|
|
|
|
else if (*Pathname == AML_MULTI_NAME_PREFIX_OP)
|
|
{
|
|
NumSegments = (UINT32)* (UINT8 *) ++Pathname;
|
|
|
|
/* point to first segment */
|
|
|
|
Pathname++;
|
|
|
|
DEBUG_PRINT (TRACE_NAMES,
|
|
("NsLookup: Multi Pathname (%d Segments, Flags=%X) \n",
|
|
NumSegments, Flags));
|
|
}
|
|
|
|
else
|
|
{
|
|
/*
|
|
* No Dual or Multi prefix, hence there is only one
|
|
* segment and Pathname is already pointing to it.
|
|
*/
|
|
NumSegments = 1;
|
|
|
|
DEBUG_PRINT (TRACE_NAMES,
|
|
("NsLookup: Simple Pathname (1 segment, Flags=%X)\n", Flags));
|
|
}
|
|
|
|
#ifdef ACPI_DEBUG
|
|
|
|
/* TBD: [Restructure] Make this a procedure */
|
|
|
|
/* Debug only: print the entire name that we are about to lookup */
|
|
|
|
DEBUG_PRINT (TRACE_NAMES, ("NsLookup: ["));
|
|
|
|
for (i = 0; i < NumSegments; i++)
|
|
{
|
|
DEBUG_PRINT_RAW (TRACE_NAMES, ("%4.4s/", &Pathname[i * 4]));
|
|
}
|
|
DEBUG_PRINT_RAW (TRACE_NAMES, ("]\n"));
|
|
#endif
|
|
}
|
|
|
|
|
|
/*
|
|
* Search namespace for each segment of the name.
|
|
* Loop through and verify/add each name segment.
|
|
*/
|
|
|
|
|
|
while (NumSegments-- && CurrentNode)
|
|
{
|
|
/*
|
|
* Search for the current name segment under the current
|
|
* named object. The Type is significant only at the last (topmost)
|
|
* level. (We don't care about the types along the path, only
|
|
* the type of the final target object.)
|
|
*/
|
|
ThisSearchType = ACPI_TYPE_ANY;
|
|
if (!NumSegments)
|
|
{
|
|
ThisSearchType = Type;
|
|
LocalFlags = Flags;
|
|
}
|
|
|
|
/* Pluck one ACPI name from the front of the pathname */
|
|
|
|
MOVE_UNALIGNED32_TO_32 (&SimpleName, Pathname);
|
|
|
|
/* Try to find the ACPI name */
|
|
|
|
Status = AcpiNsSearchAndEnter (SimpleName, WalkState,
|
|
CurrentNode, InterpreterMode,
|
|
ThisSearchType, LocalFlags,
|
|
&ThisNode);
|
|
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
if (Status == AE_NOT_FOUND)
|
|
{
|
|
/* Name not found in ACPI namespace */
|
|
|
|
DEBUG_PRINT (TRACE_NAMES,
|
|
("NsLookup: Name [%4.4s] not found in scope %X\n",
|
|
&SimpleName, CurrentNode));
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*
|
|
* If 1) This is the last segment (NumSegments == 0)
|
|
* 2) and looking for a specific type
|
|
* (Not checking for TYPE_ANY)
|
|
* 3) Which is not an alias
|
|
* 4) which is not a local type (TYPE_DEF_ANY)
|
|
* 5) which is not a local type (TYPE_SCOPE)
|
|
* 6) which is not a local type (TYPE_INDEX_FIELD_DEFN)
|
|
* 7) and type of object is known (not TYPE_ANY)
|
|
* 8) and object does not match request
|
|
*
|
|
* Then we have a type mismatch. Just warn and ignore it.
|
|
*/
|
|
if ((NumSegments == 0) &&
|
|
(TypeToCheckFor != ACPI_TYPE_ANY) &&
|
|
(TypeToCheckFor != INTERNAL_TYPE_ALIAS) &&
|
|
(TypeToCheckFor != INTERNAL_TYPE_DEF_ANY) &&
|
|
(TypeToCheckFor != INTERNAL_TYPE_SCOPE) &&
|
|
(TypeToCheckFor != INTERNAL_TYPE_INDEX_FIELD_DEFN) &&
|
|
(ThisNode->Type != ACPI_TYPE_ANY) &&
|
|
(ThisNode->Type != TypeToCheckFor))
|
|
{
|
|
/* Complain about a type mismatch */
|
|
|
|
REPORT_WARNING (
|
|
("NsLookup: %4.4s, type %X, checking for type %X\n",
|
|
&SimpleName, ThisNode->Type, TypeToCheckFor));
|
|
}
|
|
|
|
/*
|
|
* If this is the last name segment and we are not looking for a
|
|
* specific type, but the type of found object is known, use that type
|
|
* to see if it opens a scope.
|
|
*/
|
|
|
|
if ((0 == NumSegments) && (ACPI_TYPE_ANY == Type))
|
|
{
|
|
Type = ThisNode->Type;
|
|
}
|
|
|
|
if ((NumSegments || AcpiNsOpensScope (Type)) &&
|
|
(ThisNode->Child == NULL))
|
|
{
|
|
/*
|
|
* More segments or the type implies enclosed scope,
|
|
* and the next scope has not been allocated.
|
|
*/
|
|
|
|
DEBUG_PRINT (ACPI_INFO,
|
|
("NsLookup: Load mode=%X ThisNode=%X\n",
|
|
InterpreterMode, ThisNode));
|
|
}
|
|
|
|
CurrentNode = ThisNode;
|
|
|
|
/* point to next name segment */
|
|
|
|
Pathname += ACPI_NAME_SIZE;
|
|
}
|
|
|
|
|
|
/*
|
|
* Always check if we need to open a new scope
|
|
*/
|
|
|
|
CheckForNewScopeAndExit:
|
|
|
|
if (!(Flags & NS_DONT_OPEN_SCOPE) && (WalkState))
|
|
{
|
|
/*
|
|
* If entry is a type which opens a scope,
|
|
* push the new scope on the scope stack.
|
|
*/
|
|
|
|
if (AcpiNsOpensScope (TypeToCheckFor))
|
|
{
|
|
/* 8-12-98 ASL Grammar Update supports null NamePath */
|
|
|
|
if (NullNamePath)
|
|
{
|
|
/* TBD: [Investigate] - is this the correct thing to do? */
|
|
|
|
ScopeToPush = NULL;
|
|
}
|
|
else
|
|
{
|
|
ScopeToPush = ThisNode;
|
|
}
|
|
|
|
Status = AcpiDsScopeStackPush (ScopeToPush, Type,
|
|
WalkState);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
DEBUG_PRINT (ACPI_INFO,
|
|
("NsLookup: Set global scope to %p\n", ScopeToPush));
|
|
}
|
|
}
|
|
|
|
*ReturnNode = ThisNode;
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|