FreeBSD/Linux Kernel Cross Reference
sys/contrib/dev/acpica/components/events/evrgnini.c

     /******************************************************************************
      *
      * Module Name: evrgnini- ACPI AddressSpace (OpRegion) init
      *
      *****************************************************************************/
     
     /******************************************************************************
      *
      * 1. Copyright Notice
     *
     * Some or all of this work - Copyright (c) 1999 - 2022, 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 <contrib/dev/acpica/include/acpi.h>
   #include <contrib/dev/acpica/include/accommon.h>
   #include <contrib/dev/acpica/include/acevents.h>
   #include <contrib/dev/acpica/include/acnamesp.h>
   #include <contrib/dev/acpica/include/acinterp.h>
   
   #define _COMPONENT          ACPI_EVENTS
           ACPI_MODULE_NAME    ("evrgnini")
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiEvSystemMemoryRegionSetup
    *
    * PARAMETERS:  Handle              - Region we are interested in
    *              Function            - Start or stop
    *              HandlerContext      - Address space handler context
    *              RegionContext       - Region specific context
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Setup a SystemMemory operation region
    *
    ******************************************************************************/
   
   ACPI_STATUS
   AcpiEvSystemMemoryRegionSetup (
       ACPI_HANDLE             Handle,
       UINT32                  Function,
       void                    *HandlerContext,
       void                    **RegionContext)
   {
       ACPI_OPERAND_OBJECT     *RegionDesc = (ACPI_OPERAND_OBJECT *) Handle;
       ACPI_MEM_SPACE_CONTEXT  *LocalRegionContext;
       ACPI_MEM_MAPPING        *Mm;
   
   
       ACPI_FUNCTION_TRACE (EvSystemMemoryRegionSetup);
   
   
       if (Function == ACPI_REGION_DEACTIVATE)
       {
           if (*RegionContext)
           {
               LocalRegionContext = (ACPI_MEM_SPACE_CONTEXT *) *RegionContext;
   
               /* Delete memory mappings if present */
   
               while (LocalRegionContext->FirstMm)
               {
                   Mm = LocalRegionContext->FirstMm;
                   LocalRegionContext->FirstMm = Mm->NextMm;
                   AcpiOsUnmapMemory(Mm->LogicalAddress, Mm->Length);
                   ACPI_FREE(Mm);
               }
               ACPI_FREE (LocalRegionContext);
               *RegionContext = NULL;
           }
           return_ACPI_STATUS (AE_OK);
       }
   
       /* Create a new context */
   
       LocalRegionContext = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_MEM_SPACE_CONTEXT));
       if (!(LocalRegionContext))
       {
           return_ACPI_STATUS (AE_NO_MEMORY);
       }
   
       /* Save the region length and address for use in the handler */
   
       LocalRegionContext->Length  = RegionDesc->Region.Length;
       LocalRegionContext->Address = RegionDesc->Region.Address;
   
       *RegionContext = LocalRegionContext;
       return_ACPI_STATUS (AE_OK);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiEvIoSpaceRegionSetup
    *
    * PARAMETERS:  Handle              - Region we are interested in
    *              Function            - Start or stop
    *              HandlerContext      - Address space handler context
    *              RegionContext       - Region specific context
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Setup a IO operation region
    *
    ******************************************************************************/
   
   ACPI_STATUS
   AcpiEvIoSpaceRegionSetup (
       ACPI_HANDLE             Handle,
       UINT32                  Function,
       void                    *HandlerContext,
       void                    **RegionContext)
   {
       ACPI_FUNCTION_TRACE (EvIoSpaceRegionSetup);
   
   
       if (Function == ACPI_REGION_DEACTIVATE)
       {
           *RegionContext = NULL;
       }
       else
       {
           *RegionContext = HandlerContext;
       }
   
       return_ACPI_STATUS (AE_OK);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiEvPciConfigRegionSetup
    *
    * PARAMETERS:  Handle              - Region we are interested in
    *              Function            - Start or stop
    *              HandlerContext      - Address space handler context
    *              RegionContext       - Region specific context
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Setup a PCI_Config operation region
    *
    * MUTEX:       Assumes namespace is not locked
    *
    ******************************************************************************/
   
   ACPI_STATUS
   AcpiEvPciConfigRegionSetup (
       ACPI_HANDLE             Handle,
       UINT32                  Function,
       void                    *HandlerContext,
       void                    **RegionContext)
   {
       ACPI_STATUS             Status = AE_OK;
       UINT64                  PciValue;
       ACPI_PCI_ID             *PciId = *RegionContext;
       ACPI_OPERAND_OBJECT     *HandlerObj;
       ACPI_NAMESPACE_NODE     *ParentNode;
       ACPI_NAMESPACE_NODE     *PciRootNode;
       ACPI_NAMESPACE_NODE     *PciDeviceNode;
       ACPI_OPERAND_OBJECT     *RegionObj = (ACPI_OPERAND_OBJECT  *) Handle;
   
   
       ACPI_FUNCTION_TRACE (EvPciConfigRegionSetup);
   
   
       HandlerObj = RegionObj->Region.Handler;
       if (!HandlerObj)
       {
           /*
            * No installed handler. This shouldn't happen because the dispatch
            * routine checks before we get here, but we check again just in case.
            */
           ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
               "Attempting to init a region %p, with no handler\n", RegionObj));
           return_ACPI_STATUS (AE_NOT_EXIST);
       }
   
       *RegionContext = NULL;
       if (Function == ACPI_REGION_DEACTIVATE)
       {
           if (PciId)
           {
               ACPI_FREE (PciId);
           }
           return_ACPI_STATUS (Status);
       }
   
       ParentNode = RegionObj->Region.Node->Parent;
   
       /*
        * Get the _SEG and _BBN values from the device upon which the handler
        * is installed.
        *
        * We need to get the _SEG and _BBN objects relative to the PCI BUS device.
        * This is the device the handler has been registered to handle.
        */
   
       /*
        * If the AddressSpace.Node is still pointing to the root, we need
        * to scan upward for a PCI Root bridge and re-associate the OpRegion
        * handlers with that device.
        */
       if (HandlerObj->AddressSpace.Node == AcpiGbl_RootNode)
       {
           /* Start search from the parent object */
   
           PciRootNode = ParentNode;
           while (PciRootNode != AcpiGbl_RootNode)
           {
               /* Get the _HID/_CID in order to detect a RootBridge */
   
               if (AcpiEvIsPciRootBridge (PciRootNode))
               {
                   /* Install a handler for this PCI root bridge */
   
                   Status = AcpiInstallAddressSpaceHandler (
                       (ACPI_HANDLE) PciRootNode,
                       ACPI_ADR_SPACE_PCI_CONFIG,
                       ACPI_DEFAULT_HANDLER, NULL, NULL);
                   if (ACPI_FAILURE (Status))
                   {
                       if (Status == AE_SAME_HANDLER)
                       {
                           /*
                            * It is OK if the handler is already installed on the
                            * root bridge. Still need to return a context object
                            * for the new PCI_Config operation region, however.
                            */
                       }
                       else
                       {
                           ACPI_EXCEPTION ((AE_INFO, Status,
                               "Could not install PciConfig handler "
                               "for Root Bridge %4.4s",
                               AcpiUtGetNodeName (PciRootNode)));
                       }
                   }
                   break;
               }
   
               PciRootNode = PciRootNode->Parent;
           }
   
           /* PCI root bridge not found, use namespace root node */
       }
       else
       {
           PciRootNode = HandlerObj->AddressSpace.Node;
       }
   
       /*
        * If this region is now initialized, we are done.
        * (InstallAddressSpaceHandler could have initialized it)
        */
       if (RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE)
       {
           return_ACPI_STATUS (AE_OK);
       }
   
       /* Region is still not initialized. Create a new context */
   
       PciId = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_PCI_ID));
       if (!PciId)
       {
           return_ACPI_STATUS (AE_NO_MEMORY);
       }
   
       /*
        * For PCI_Config space access, we need the segment, bus, device and
        * function numbers. Acquire them here.
        *
        * Find the parent device object. (This allows the operation region to be
        * within a subscope under the device, such as a control method.)
        */
       PciDeviceNode = RegionObj->Region.Node;
       while (PciDeviceNode && (PciDeviceNode->Type != ACPI_TYPE_DEVICE))
       {
           PciDeviceNode = PciDeviceNode->Parent;
       }
   
       if (!PciDeviceNode)
       {
           ACPI_FREE (PciId);
           return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
       }
   
       /*
        * Get the PCI device and function numbers from the _ADR object
        * contained in the parent's scope.
        */
       Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR,
           PciDeviceNode, &PciValue);
   
       /*
        * The default is zero, and since the allocation above zeroed the data,
        * just do nothing on failure.
        */
       if (ACPI_SUCCESS (Status))
       {
           PciId->Device   = ACPI_HIWORD (ACPI_LODWORD (PciValue));
           PciId->Function = ACPI_LOWORD (ACPI_LODWORD (PciValue));
       }
   
       /* The PCI segment number comes from the _SEG method */
   
       Status = AcpiUtEvaluateNumericObject (METHOD_NAME__SEG,
           PciRootNode, &PciValue);
       if (ACPI_SUCCESS (Status))
       {
           PciId->Segment = ACPI_LOWORD (PciValue);
       }
   
       /* The PCI bus number comes from the _BBN method */
   
       Status = AcpiUtEvaluateNumericObject (METHOD_NAME__BBN,
           PciRootNode, &PciValue);
       if (ACPI_SUCCESS (Status))
       {
           PciId->Bus = ACPI_LOWORD (PciValue);
       }
   
       /* Complete/update the PCI ID for this device */
   
       Status = AcpiHwDerivePciId (PciId, PciRootNode, RegionObj->Region.Node);
       if (ACPI_FAILURE (Status))
       {
           ACPI_FREE (PciId);
           return_ACPI_STATUS (Status);
       }
   
       *RegionContext = PciId;
       return_ACPI_STATUS (AE_OK);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiEvIsPciRootBridge
    *
    * PARAMETERS:  Node            - Device node being examined
    *
    * RETURN:      TRUE if device is a PCI/PCI-Express Root Bridge
    *
    * DESCRIPTION: Determine if the input device represents a PCI Root Bridge by
    *              examining the _HID and _CID for the device.
    *
    ******************************************************************************/
   
   BOOLEAN
   AcpiEvIsPciRootBridge (
       ACPI_NAMESPACE_NODE     *Node)
   {
       ACPI_STATUS             Status;
       ACPI_PNP_DEVICE_ID      *Hid;
       ACPI_PNP_DEVICE_ID_LIST *Cid;
       UINT32                  i;
       BOOLEAN                 Match;
   
   
       /* Get the _HID and check for a PCI Root Bridge */
   
       Status = AcpiUtExecute_HID (Node, &Hid);
       if (ACPI_FAILURE (Status))
       {
           return (FALSE);
       }
   
       Match = AcpiUtIsPciRootBridge (Hid->String);
       ACPI_FREE (Hid);
   
       if (Match)
       {
           return (TRUE);
       }
   
       /* The _HID did not match. Get the _CID and check for a PCI Root Bridge */
   
       Status = AcpiUtExecute_CID (Node, &Cid);
       if (ACPI_FAILURE (Status))
       {
           return (FALSE);
       }
   
       /* Check all _CIDs in the returned list */
   
       for (i = 0; i < Cid->Count; i++)
       {
           if (AcpiUtIsPciRootBridge (Cid->Ids[i].String))
           {
               ACPI_FREE (Cid);
               return (TRUE);
           }
       }
   
       ACPI_FREE (Cid);
       return (FALSE);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiEvPciBarRegionSetup
    *
    * PARAMETERS:  Handle              - Region we are interested in
    *              Function            - Start or stop
    *              HandlerContext      - Address space handler context
    *              RegionContext       - Region specific context
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Setup a PciBAR operation region
    *
    * MUTEX:       Assumes namespace is not locked
    *
    ******************************************************************************/
   
   ACPI_STATUS
   AcpiEvPciBarRegionSetup (
       ACPI_HANDLE             Handle,
       UINT32                  Function,
       void                    *HandlerContext,
       void                    **RegionContext)
   {
       ACPI_FUNCTION_TRACE (EvPciBarRegionSetup);
   
   
       return_ACPI_STATUS (AE_OK);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiEvCmosRegionSetup
    *
    * PARAMETERS:  Handle              - Region we are interested in
    *              Function            - Start or stop
    *              HandlerContext      - Address space handler context
    *              RegionContext       - Region specific context
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Setup a CMOS operation region
    *
    * MUTEX:       Assumes namespace is not locked
    *
    ******************************************************************************/
   
   ACPI_STATUS
   AcpiEvCmosRegionSetup (
       ACPI_HANDLE             Handle,
       UINT32                  Function,
       void                    *HandlerContext,
       void                    **RegionContext)
   {
       ACPI_FUNCTION_TRACE (EvCmosRegionSetup);
   
   
       return_ACPI_STATUS (AE_OK);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiEvDataTableRegionSetup
    *
    * PARAMETERS:  Handle              - Region we are interested in
    *              Function            - Start or stop
    *              HandlerContext      - Address space handler context
    *              RegionContext       - Region specific context
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Setup a DataTableRegion
    *
    * MUTEX:       Assumes namespace is not locked
    *
    ******************************************************************************/
   
   ACPI_STATUS
   AcpiEvDataTableRegionSetup (
       ACPI_HANDLE             Handle,
       UINT32                  Function,
       void                    *HandlerContext,
       void                    **RegionContext)
   {
       ACPI_OPERAND_OBJECT     *RegionDesc = (ACPI_OPERAND_OBJECT *) Handle;
       ACPI_DATA_TABLE_MAPPING *LocalRegionContext;
   
   
       ACPI_FUNCTION_TRACE (EvDataTableRegionSetup);
   
   
       if (Function == ACPI_REGION_DEACTIVATE)
       {
           if (*RegionContext)
           {
               ACPI_FREE (*RegionContext);
               *RegionContext = NULL;
           }
           return_ACPI_STATUS (AE_OK);
       }
   
       /* Create a new context */
   
       LocalRegionContext = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_DATA_TABLE_MAPPING));
       if (!(LocalRegionContext))
       {
           return_ACPI_STATUS (AE_NO_MEMORY);
       }
   
       /* Save the data table pointer for use in the handler */
   
       LocalRegionContext->Pointer = RegionDesc->Region.Pointer;
   
       *RegionContext = LocalRegionContext;
       return_ACPI_STATUS (AE_OK);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiEvDefaultRegionSetup
    *
    * PARAMETERS:  Handle              - Region we are interested in
    *              Function            - Start or stop
    *              HandlerContext      - Address space handler context
    *              RegionContext       - Region specific context
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Default region initialization
    *
    ******************************************************************************/
   
   ACPI_STATUS
   AcpiEvDefaultRegionSetup (
       ACPI_HANDLE             Handle,
       UINT32                  Function,
       void                    *HandlerContext,
       void                    **RegionContext)
   {
       ACPI_FUNCTION_TRACE (EvDefaultRegionSetup);
   
   
       if (Function == ACPI_REGION_DEACTIVATE)
       {
           *RegionContext = NULL;
       }
       else
       {
           *RegionContext = HandlerContext;
       }
   
       return_ACPI_STATUS (AE_OK);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiEvInitializeRegion
    *
    * PARAMETERS:  RegionObj       - Region we are initializing
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Initializes the region, finds any _REG methods and saves them
    *              for execution at a later time
    *
    *              Get the appropriate address space handler for a newly
    *              created region.
    *
    *              This also performs address space specific initialization. For
    *              example, PCI regions must have an _ADR object that contains
    *              a PCI address in the scope of the definition. This address is
    *              required to perform an access to PCI config space.
    *
    * MUTEX:       Interpreter should be unlocked, because we may run the _REG
    *              method for this region.
    *
    * NOTE:        Possible incompliance:
    *              There is a behavior conflict in automatic _REG execution:
    *              1. When the interpreter is evaluating a method, we can only
    *                 automatically run _REG for the following case:
    *                   Method(_REG, 2) {}
    *                   OperationRegion (OPR1, 0x80, 0x1000010, 0x4)
    *              2. When the interpreter is loading a table, we can also
    *                 automatically run _REG for the following case:
    *                   OperationRegion (OPR1, 0x80, 0x1000010, 0x4)
    *                   Method(_REG, 2) {}
    *              Though this may not be compliant to the de-facto standard, the
    *              logic is kept in order not to trigger regressions. And keeping
    *              this logic should be taken care by the caller of this function.
    *
    ******************************************************************************/
   
   ACPI_STATUS
   AcpiEvInitializeRegion (
       ACPI_OPERAND_OBJECT     *RegionObj)
   {
       ACPI_OPERAND_OBJECT     *HandlerObj;
       ACPI_OPERAND_OBJECT     *ObjDesc;
       ACPI_ADR_SPACE_TYPE     SpaceId;
       ACPI_NAMESPACE_NODE     *Node;
   
   
       ACPI_FUNCTION_TRACE (EvInitializeRegion);
   
   
       if (!RegionObj)
       {
           return_ACPI_STATUS (AE_BAD_PARAMETER);
       }
   
       if (RegionObj->Common.Flags & AOPOBJ_OBJECT_INITIALIZED)
       {
           return_ACPI_STATUS (AE_OK);
       }
   
       RegionObj->Common.Flags |= AOPOBJ_OBJECT_INITIALIZED;
   
       Node = RegionObj->Region.Node->Parent;
       SpaceId = RegionObj->Region.SpaceId;
   
       /*
        * The following loop depends upon the root Node having no parent
        * ie: AcpiGbl_RootNode->Parent being set to NULL
        */
       while (Node)
       {
           /* Check to see if a handler exists */
   
           HandlerObj = NULL;
           ObjDesc = AcpiNsGetAttachedObject (Node);
           if (ObjDesc)
           {
               /* Can only be a handler if the object exists */
   
               switch (Node->Type)
               {
               case ACPI_TYPE_DEVICE:
               case ACPI_TYPE_PROCESSOR:
               case ACPI_TYPE_THERMAL:
   
                   HandlerObj = ObjDesc->CommonNotify.Handler;
                   break;
   
               default:
   
                   /* Ignore other objects */
   
                   break;
               }
   
               HandlerObj = AcpiEvFindRegionHandler (SpaceId, HandlerObj);
               if (HandlerObj)
               {
                   /* Found correct handler */
   
                   ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
                       "Found handler %p for region %p in obj %p\n",
                       HandlerObj, RegionObj, ObjDesc));
   
                   (void) AcpiEvAttachRegion (HandlerObj, RegionObj, FALSE);
   
                   /*
                    * Tell all users that this region is usable by
                    * running the _REG method
                    */
                   AcpiExExitInterpreter ();
                   (void) AcpiEvExecuteRegMethod (RegionObj, ACPI_REG_CONNECT);
                   AcpiExEnterInterpreter ();
                   return_ACPI_STATUS (AE_OK);
               }
           }
   
           /* This node does not have the handler we need; Pop up one level */
   
           Node = Node->Parent;
       }
   
       /*
        * If we get here, there is no handler for this region. This is not
        * fatal because many regions get created before a handler is installed
        * for said region.
        */
       ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
           "No handler for RegionType %s(%X) (RegionObj %p)\n",
           AcpiUtGetRegionName (SpaceId), SpaceId, RegionObj));
   
       return_ACPI_STATUS (AE_OK);
   }

Cache object: d114b5e71b435130b5e4a86edd3ae976