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 /******************************************************************************
  *
  * Module Name: nsinit - namespace initialization
  *
  *****************************************************************************/
 
 /******************************************************************************
  *
  * 1. Copyright Notice
  *
  * Some or all of this work - Copyright (c) 1999 - 2024, 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.
  *
  *****************************************************************************
  *
  * Alternatively, you may choose to be licensed under the terms of the
  * following license:
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions, and the following disclaimer,
  *    without modification.
  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  *    substantially similar to the "NO WARRANTY" disclaimer below
  *    ("Disclaimer") and any redistribution must be conditioned upon
  *    including a substantially similar Disclaimer requirement for further
  *    binary redistribution.
  * 3. Neither the names of the above-listed copyright holders nor the names
  *    of any contributors may be used to endorse or promote products derived
  *    from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  * Alternatively, you may choose to be licensed under the terms of the
  * GNU General Public License ("GPL") version 2 as published by the Free
  * Software Foundation.
  *
  *****************************************************************************/
 
 #include "acpi.h"
 #include "accommon.h"
 #include "acnamesp.h"
 #include "acdispat.h"
 #include "acinterp.h"
 #include "acevents.h"
 
 #define _COMPONENT          ACPI_NAMESPACE
         ACPI_MODULE_NAME    ("nsinit")
 
 /* Local prototypes */
 
 static ACPI_STATUS
 AcpiNsInitOneObject (
     ACPI_HANDLE             ObjHandle,
     UINT32                  Level,
     void                    *Context,
     void                    **ReturnValue);
 
 static ACPI_STATUS
 AcpiNsInitOneDevice (
     ACPI_HANDLE             ObjHandle,
     UINT32                  NestingLevel,
     void                    *Context,
     void                    **ReturnValue);
 
 static ACPI_STATUS
 AcpiNsFindIniMethods (
     ACPI_HANDLE             ObjHandle,
     UINT32                  NestingLevel,
     void                    *Context,
     void                    **ReturnValue);
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiNsInitializeObjects
  *
  * PARAMETERS:  None
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Walk the entire namespace and perform any necessary
  *              initialization on the objects found therein
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiNsInitializeObjects (
     void)
 {
     ACPI_STATUS             Status;
     ACPI_INIT_WALK_INFO     Info;
 
 
     ACPI_FUNCTION_TRACE (NsInitializeObjects);
 
 
     ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
         "[Init] Completing Initialization of ACPI Objects\n"));
     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
         "**** Starting initialization of namespace objects ****\n"));
     ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
         "Final data object initialization: "));
 
     /* Clear the info block */
 
     memset (&Info, 0, sizeof (ACPI_INIT_WALK_INFO));
 
     /* Walk entire namespace from the supplied root */
 
     /*
      * TBD: will become ACPI_TYPE_PACKAGE as this type object
      * is now the only one that supports deferred initialization
      * (forward references).
      */
     Status = AcpiWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
         ACPI_UINT32_MAX, AcpiNsInitOneObject, NULL, &Info, NULL);
     if (ACPI_FAILURE (Status))
     {
         ACPI_EXCEPTION ((AE_INFO, Status, "During WalkNamespace"));
     }
 
     ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
         "Namespace contains %u (0x%X) objects\n",
         Info.ObjectCount,
         Info.ObjectCount));
 
     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
         "%u Control Methods found\n%u Op Regions found\n",
         Info.MethodCount, Info.OpRegionCount));
 
     return_ACPI_STATUS (AE_OK);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiNsInitializeDevices
  *
  * PARAMETERS:  None
  *
  * RETURN:      ACPI_STATUS
  *
  * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices.
  *              This means running _INI on all present devices.
  *
  *              Note: We install PCI config space handler on region access,
  *              not here.
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiNsInitializeDevices (
     UINT32                  Flags)
 {
     ACPI_STATUS             Status = AE_OK;
     ACPI_DEVICE_WALK_INFO   Info;
     ACPI_HANDLE             Handle;
 
 
     ACPI_FUNCTION_TRACE (NsInitializeDevices);
 
 
     if (!(Flags & ACPI_NO_DEVICE_INIT))
     {
         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
             "[Init] Initializing ACPI Devices\n"));
 
         /* Init counters */
 
         Info.DeviceCount = 0;
         Info.Num_STA = 0;
         Info.Num_INI = 0;
 
         ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
             "Initializing Device/Processor/Thermal objects "
             "and executing _INI/_STA methods:\n"));
 
         /* Tree analysis: find all subtrees that contain _INI methods */
 
         Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
             ACPI_UINT32_MAX, FALSE, AcpiNsFindIniMethods, NULL, &Info, NULL);
         if (ACPI_FAILURE (Status))
         {
             goto ErrorExit;
         }
 
         /* Allocate the evaluation information block */
 
         Info.EvaluateInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
         if (!Info.EvaluateInfo)
         {
             Status = AE_NO_MEMORY;
             goto ErrorExit;
         }
 
         /*
          * Execute the "global" _INI method that may appear at the root.
          * This support is provided for Windows compatibility (Vista+) and
          * is not part of the ACPI specification.
          */
         Info.EvaluateInfo->PrefixNode = AcpiGbl_RootNode;
         Info.EvaluateInfo->RelativePathname = METHOD_NAME__INI;
         Info.EvaluateInfo->Parameters = NULL;
         Info.EvaluateInfo->Flags = ACPI_IGNORE_RETURN_VALUE;
 
         Status = AcpiNsEvaluate (Info.EvaluateInfo);
         if (ACPI_SUCCESS (Status))
         {
             Info.Num_INI++;
         }
 
         /*
          * Execute \_SB._INI.
          * There appears to be a strict order requirement for \_SB._INI,
          * which should be evaluated before any _REG evaluations.
          */
         Status = AcpiGetHandle (NULL, "\\_SB", &Handle);
         if (ACPI_SUCCESS (Status))
         {
             memset (Info.EvaluateInfo, 0, sizeof (ACPI_EVALUATE_INFO));
             Info.EvaluateInfo->PrefixNode = Handle;
             Info.EvaluateInfo->RelativePathname = METHOD_NAME__INI;
             Info.EvaluateInfo->Parameters = NULL;
             Info.EvaluateInfo->Flags = ACPI_IGNORE_RETURN_VALUE;
 
             Status = AcpiNsEvaluate (Info.EvaluateInfo);
             if (ACPI_SUCCESS (Status))
             {
                 Info.Num_INI++;
             }
         }
     }
 
     /*
      * Run all _REG methods
      *
      * Note: Any objects accessed by the _REG methods will be automatically
      * initialized, even if they contain executable AML (see the call to
      * AcpiNsInitializeObjects below).
      *
      * Note: According to the ACPI specification, we actually needn't execute
      * _REG for SystemMemory/SystemIo operation regions, but for PCI_Config
      * operation regions, it is required to evaluate _REG for those on a PCI
      * root bus that doesn't contain _BBN object. So this code is kept here
      * in order not to break things.
      */
     if (!(Flags & ACPI_NO_ADDRESS_SPACE_INIT))
     {
         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
             "[Init] Executing _REG OpRegion methods\n"));
 
         Status = AcpiEvInitializeOpRegions ();
         if (ACPI_FAILURE (Status))
         {
             goto ErrorExit;
         }
     }
 
     if (!(Flags & ACPI_NO_DEVICE_INIT))
     {
         /* Walk namespace to execute all _INIs on present devices */
 
         Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
             ACPI_UINT32_MAX, FALSE, AcpiNsInitOneDevice, NULL, &Info, NULL);
 
         /*
          * Any _OSI requests should be completed by now. If the BIOS has
          * requested any Windows OSI strings, we will always truncate
          * I/O addresses to 16 bits -- for Windows compatibility.
          */
         if (AcpiGbl_OsiData >= ACPI_OSI_WIN_2000)
         {
             AcpiGbl_TruncateIoAddresses = TRUE;
         }
 
         ACPI_FREE (Info.EvaluateInfo);
         if (ACPI_FAILURE (Status))
         {
             goto ErrorExit;
         }
 
         ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
             "    Executed %u _INI methods requiring %u _STA executions "
             "(examined %u objects)\n",
             Info.Num_INI, Info.Num_STA, Info.DeviceCount));
     }
 
     return_ACPI_STATUS (Status);
 
 
 ErrorExit:
     ACPI_EXCEPTION ((AE_INFO, Status, "During device initialization"));
     return_ACPI_STATUS (Status);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiNsInitOnePackage
  *
  * PARAMETERS:  ObjHandle       - Node
  *              Level           - Current nesting level
  *              Context         - Not used
  *              ReturnValue     - Not used
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Callback from AcpiWalkNamespace. Invoked for every package
  *              within the namespace. Used during dynamic load of an SSDT.
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiNsInitOnePackage (
     ACPI_HANDLE             ObjHandle,
     UINT32                  Level,
     void                    *Context,
     void                    **ReturnValue)
 {
     ACPI_STATUS             Status;
     ACPI_OPERAND_OBJECT     *ObjDesc;
     ACPI_NAMESPACE_NODE     *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
 
 
     ObjDesc = AcpiNsGetAttachedObject (Node);
     if (!ObjDesc)
     {
         return (AE_OK);
     }
 
     /* Exit if package is already initialized */
 
     if (ObjDesc->Package.Flags & AOPOBJ_DATA_VALID)
     {
         return (AE_OK);
     }
 
     Status = AcpiDsGetPackageArguments (ObjDesc);
     if (ACPI_FAILURE (Status))
     {
         return (AE_OK);
     }
 
     Status = AcpiUtWalkPackageTree (ObjDesc, NULL, AcpiDsInitPackageElement,
         NULL);
     if (ACPI_FAILURE (Status))
     {
         return (AE_OK);
     }
 
     ObjDesc->Package.Flags |= AOPOBJ_DATA_VALID;
     return (AE_OK);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiNsInitOneObject
  *
  * PARAMETERS:  ObjHandle       - Node
  *              Level           - Current nesting level
  *              Context         - Points to a init info struct
  *              ReturnValue     - Not used
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Callback from AcpiWalkNamespace. Invoked for every object
  *              within the namespace.
  *
  *              Currently, the only objects that require initialization are:
  *              1) Methods
  *              2) Op Regions
  *
  ******************************************************************************/
 
 static ACPI_STATUS
 AcpiNsInitOneObject (
     ACPI_HANDLE             ObjHandle,
     UINT32                  Level,
     void                    *Context,
     void                    **ReturnValue)
 {
     ACPI_OBJECT_TYPE        Type;
     ACPI_STATUS             Status = AE_OK;
     ACPI_INIT_WALK_INFO     *Info = (ACPI_INIT_WALK_INFO *) Context;
     ACPI_NAMESPACE_NODE     *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
     ACPI_OPERAND_OBJECT     *ObjDesc;
 
 
     ACPI_FUNCTION_NAME (NsInitOneObject);
 
 
     Info->ObjectCount++;
 
     /* And even then, we are only interested in a few object types */
 
     Type = AcpiNsGetType (ObjHandle);
     ObjDesc = AcpiNsGetAttachedObject (Node);
     if (!ObjDesc)
     {
         return (AE_OK);
     }
 
     /* Increment counters for object types we are looking for */
 
     switch (Type)
     {
     case ACPI_TYPE_REGION:
 
         Info->OpRegionCount++;
         break;
 
     case ACPI_TYPE_BUFFER_FIELD:
 
         Info->FieldCount++;
         break;
 
     case ACPI_TYPE_LOCAL_BANK_FIELD:
 
         Info->FieldCount++;
         break;
 
     case ACPI_TYPE_BUFFER:
 
         Info->BufferCount++;
         break;
 
     case ACPI_TYPE_PACKAGE:
 
         Info->PackageCount++;
         break;
 
     default:
 
         /* No init required, just exit now */
 
         return (AE_OK);
     }
 
     /* If the object is already initialized, nothing else to do */
 
     if (ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)
     {
         return (AE_OK);
     }
 
     /* Must lock the interpreter before executing AML code */
 
     AcpiExEnterInterpreter ();
 
     /*
      * Only initialization of Package objects can be deferred, in order
      * to support forward references.
      */
     switch (Type)
     {
     case ACPI_TYPE_LOCAL_BANK_FIELD:
 
         /* TBD: BankFields do not require deferred init, remove this code */
 
         Info->FieldInit++;
         Status = AcpiDsGetBankFieldArguments (ObjDesc);
         break;
 
     case ACPI_TYPE_PACKAGE:
 
         /* Complete the initialization/resolution of the package object */
 
         Info->PackageInit++;
         Status = AcpiNsInitOnePackage (ObjHandle, Level, NULL, NULL);
         break;
 
     default:
 
         /* No other types should get here */
 
         Status = AE_TYPE;
         ACPI_EXCEPTION ((AE_INFO, Status,
             "Opcode is not deferred [%4.4s] (%s)",
             AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Type)));
         break;
     }
 
     if (ACPI_FAILURE (Status))
     {
         ACPI_EXCEPTION ((AE_INFO, Status,
             "Could not execute arguments for [%4.4s] (%s)",
             AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Type)));
     }
 
     /*
      * We ignore errors from above, and always return OK, since we don't want
      * to abort the walk on any single error.
      */
     AcpiExExitInterpreter ();
     return (AE_OK);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiNsFindIniMethods
  *
  * PARAMETERS:  ACPI_WALK_CALLBACK
  *
  * RETURN:      ACPI_STATUS
  *
  * DESCRIPTION: Called during namespace walk. Finds objects named _INI under
  *              device/processor/thermal objects, and marks the entire subtree
  *              with a SUBTREE_HAS_INI flag. This flag is used during the
  *              subsequent device initialization walk to avoid entire subtrees
  *              that do not contain an _INI.
  *
  ******************************************************************************/
 
 static ACPI_STATUS
 AcpiNsFindIniMethods (
     ACPI_HANDLE             ObjHandle,
     UINT32                  NestingLevel,
     void                    *Context,
     void                    **ReturnValue)
 {
     ACPI_DEVICE_WALK_INFO   *Info = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context);
     ACPI_NAMESPACE_NODE     *Node;
     ACPI_NAMESPACE_NODE     *ParentNode;
 
 
     /* Keep count of device/processor/thermal objects */
 
     Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
     if ((Node->Type == ACPI_TYPE_DEVICE)    ||
         (Node->Type == ACPI_TYPE_PROCESSOR) ||
         (Node->Type == ACPI_TYPE_THERMAL))
     {
         Info->DeviceCount++;
         return (AE_OK);
     }
 
     /* We are only looking for methods named _INI */
 
     if (!ACPI_COMPARE_NAMESEG (Node->Name.Ascii, METHOD_NAME__INI))
     {
         return (AE_OK);
     }
 
     /*
      * The only _INI methods that we care about are those that are
      * present under Device, Processor, and Thermal objects.
      */
     ParentNode = Node->Parent;
     switch (ParentNode->Type)
     {
     case ACPI_TYPE_DEVICE:
     case ACPI_TYPE_PROCESSOR:
     case ACPI_TYPE_THERMAL:
 
         /* Mark parent and bubble up the INI present flag to the root */
 
         while (ParentNode)
         {
             ParentNode->Flags |= ANOBJ_SUBTREE_HAS_INI;
             ParentNode = ParentNode->Parent;
         }
         break;
 
     default:
 
         break;
     }
 
     return (AE_OK);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiNsInitOneDevice
  *
  * PARAMETERS:  ACPI_WALK_CALLBACK
  *
  * RETURN:      ACPI_STATUS
  *
  * DESCRIPTION: This is called once per device soon after ACPI is enabled
  *              to initialize each device. It determines if the device is
  *              present, and if so, calls _INI.
  *
  ******************************************************************************/
 
 static ACPI_STATUS
 AcpiNsInitOneDevice (
     ACPI_HANDLE             ObjHandle,
     UINT32                  NestingLevel,
     void                    *Context,
     void                    **ReturnValue)
 {
     ACPI_DEVICE_WALK_INFO   *WalkInfo = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context);
     ACPI_EVALUATE_INFO      *Info = WalkInfo->EvaluateInfo;
     UINT32                  Flags;
     ACPI_STATUS             Status;
     ACPI_NAMESPACE_NODE     *DeviceNode;
 
 
     ACPI_FUNCTION_TRACE (NsInitOneDevice);
 
 
     /* We are interested in Devices, Processors and ThermalZones only */
 
     DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
     if ((DeviceNode->Type != ACPI_TYPE_DEVICE)    &&
         (DeviceNode->Type != ACPI_TYPE_PROCESSOR) &&
         (DeviceNode->Type != ACPI_TYPE_THERMAL))
     {
         return_ACPI_STATUS (AE_OK);
     }
 
     /*
      * Because of an earlier namespace analysis, all subtrees that contain an
      * _INI method are tagged.
      *
      * If this device subtree does not contain any _INI methods, we
      * can exit now and stop traversing this entire subtree.
      */
     if (!(DeviceNode->Flags & ANOBJ_SUBTREE_HAS_INI))
     {
         return_ACPI_STATUS (AE_CTRL_DEPTH);
     }
 
     /*
      * Run _STA to determine if this device is present and functioning. We
      * must know this information for two important reasons (from ACPI spec):
      *
      * 1) We can only run _INI if the device is present.
      * 2) We must abort the device tree walk on this subtree if the device is
      *    not present and is not functional (we will not examine the children)
      *
      * The _STA method is not required to be present under the device, we
      * assume the device is present if _STA does not exist.
      */
     ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname (
         ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__STA));
 
     Status = AcpiUtExecute_STA (DeviceNode, &Flags);
     if (ACPI_FAILURE (Status))
     {
         /* Ignore error and move on to next device */
 
         return_ACPI_STATUS (AE_OK);
     }
 
     /*
      * Flags == -1 means that _STA was not found. In this case, we assume that
      * the device is both present and functional.
      *
      * From the ACPI spec, description of _STA:
      *
      * "If a device object (including the processor object) does not have an
      * _STA object, then OSPM assumes that all of the above bits are set (in
      * other words, the device is present, ..., and functioning)"
      */
     if (Flags != ACPI_UINT32_MAX)
     {
         WalkInfo->Num_STA++;
     }
 
     /*
      * Examine the PRESENT and FUNCTIONING status bits
      *
      * Note: ACPI spec does not seem to specify behavior for the present but
      * not functioning case, so we assume functioning if present.
      */
     if (!(Flags & ACPI_STA_DEVICE_PRESENT))
     {
         /* Device is not present, we must examine the Functioning bit */
 
         if (Flags & ACPI_STA_DEVICE_FUNCTIONING)
         {
             /*
              * Device is not present but is "functioning". In this case,
              * we will not run _INI, but we continue to examine the children
              * of this device.
              *
              * From the ACPI spec, description of _STA: (Note - no mention
              * of whether to run _INI or not on the device in question)
              *
              * "_STA may return bit 0 clear (not present) with bit 3 set
              * (device is functional). This case is used to indicate a valid
              * device for which no device driver should be loaded (for example,
              * a bridge device.) Children of this device may be present and
              * valid. OSPM should continue enumeration below a device whose
              * _STA returns this bit combination"
              */
             return_ACPI_STATUS (AE_OK);
         }
         else
         {
             /*
              * Device is not present and is not functioning. We must abort the
              * walk of this subtree immediately -- don't look at the children
              * of such a device.
              *
              * From the ACPI spec, description of _INI:
              *
              * "If the _STA method indicates that the device is not present,
              * OSPM will not run the _INI and will not examine the children
              * of the device for _INI methods"
              */
             return_ACPI_STATUS (AE_CTRL_DEPTH);
         }
     }
 
     /*
      * The device is present or is assumed present if no _STA exists.
      * Run the _INI if it exists (not required to exist)
      *
      * Note: We know there is an _INI within this subtree, but it may not be
      * under this particular device, it may be lower in the branch.
      */
     if (!ACPI_COMPARE_NAMESEG (DeviceNode->Name.Ascii, "_SB_") ||
         DeviceNode->Parent != AcpiGbl_RootNode)
     {
         ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname (
             ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__INI));
 
         memset (Info, 0, sizeof (ACPI_EVALUATE_INFO));
         Info->PrefixNode = DeviceNode;
         Info->RelativePathname = METHOD_NAME__INI;
         Info->Parameters = NULL;
         Info->Flags = ACPI_IGNORE_RETURN_VALUE;
 
         Status = AcpiNsEvaluate (Info);
         if (ACPI_SUCCESS (Status))
         {
             WalkInfo->Num_INI++;
         }
 
 #ifdef ACPI_DEBUG_OUTPUT
         else if (Status != AE_NOT_FOUND)
         {
             /* Ignore error and move on to next device */
 
             char *ScopeName = AcpiNsGetNormalizedPathname (DeviceNode, TRUE);
 
             ACPI_EXCEPTION ((AE_INFO, Status, "during %s._INI execution",
                 ScopeName));
             ACPI_FREE (ScopeName);
         }
 #endif
     }
 
     /* Ignore errors from above */
 
     Status = AE_OK;
 
     /*
      * The _INI method has been run if present; call the Global Initialization
      * Handler for this device.
      */
     if (AcpiGbl_InitHandler)
     {
         Status = AcpiGbl_InitHandler (DeviceNode, ACPI_INIT_DEVICE_INI);
     }
 
     return_ACPI_STATUS (Status);
 }

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