drivers/acpica/evrgnini.c

0001 /******************************************************************************
0002  *
0003  * Module Name: evrgnini- ACPI AddressSpace (OpRegion) init
0004  *
0005  *****************************************************************************/
0006
0007 /******************************************************************************
0008  *
0009  * 1. Copyright Notice
0010  *
0011  * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp.
0012  * All rights reserved.
0013  *
0014  * 2. License
0015  *
0016  * 2.1. This is your license from Intel Corp. under its intellectual property
0017  * rights.  You may have additional license terms from the party that provided
0018  * you this software, covering your right to use that party's intellectual
0019  * property rights.
0020  *
0021  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
0022  * copy of the source code appearing in this file ("Covered Code") an
0023  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
0024  * base code distributed originally by Intel ("Original Intel Code") to copy,
0025  * make derivatives, distribute, use and display any portion of the Covered
0026  * Code in any form, with the right to sublicense such rights; and
0027  *
0028  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
0029  * license (with the right to sublicense), under only those claims of Intel
0030  * patents that are infringed by the Original Intel Code, to make, use, sell,
0031  * offer to sell, and import the Covered Code and derivative works thereof
0032  * solely to the minimum extent necessary to exercise the above copyright
0033  * license, and in no event shall the patent license extend to any additions
0034  * to or modifications of the Original Intel Code.  No other license or right
0035  * is granted directly or by implication, estoppel or otherwise;
0036  *
0037  * The above copyright and patent license is granted only if the following
0038  * conditions are met:
0039  *
0040  * 3. Conditions
0041  *
0042  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
0043  * Redistribution of source code of any substantial portion of the Covered
0044  * Code or modification with rights to further distribute source must include
0045  * the above Copyright Notice, the above License, this list of Conditions,
0046  * and the following Disclaimer and Export Compliance provision.  In addition,
0047  * Licensee must cause all Covered Code to which Licensee contributes to
0048  * contain a file documenting the changes Licensee made to create that Covered
0049  * Code and the date of any change.  Licensee must include in that file the
0050  * documentation of any changes made by any predecessor Licensee.  Licensee
0051  * must include a prominent statement that the modification is derived,
0052  * directly or indirectly, from Original Intel Code.
0053  *
0054  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
0055  * Redistribution of source code of any substantial portion of the Covered
0056  * Code or modification without rights to further distribute source must
0057  * include the following Disclaimer and Export Compliance provision in the
0058  * documentation and/or other materials provided with distribution.  In
0059  * addition, Licensee may not authorize further sublicense of source of any
0060  * portion of the Covered Code, and must include terms to the effect that the
0061  * license from Licensee to its licensee is limited to the intellectual
0062  * property embodied in the software Licensee provides to its licensee, and
0063  * not to intellectual property embodied in modifications its licensee may
0064  * make.
0065  *
0066  * 3.3. Redistribution of Executable. Redistribution in executable form of any
0067  * substantial portion of the Covered Code or modification must reproduce the
0068  * above Copyright Notice, and the following Disclaimer and Export Compliance
0069  * provision in the documentation and/or other materials provided with the
0070  * distribution.
0071  *
0072  * 3.4. Intel retains all right, title, and interest in and to the Original
0073  * Intel Code.
0074  *
0075  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
0076  * Intel shall be used in advertising or otherwise to promote the sale, use or
0077  * other dealings in products derived from or relating to the Covered Code
0078  * without prior written authorization from Intel.
0079  *
0080  * 4. Disclaimer and Export Compliance
0081  *
0082  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
0083  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
0084  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
0085  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
0086  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
0087  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
0088  * PARTICULAR PURPOSE.
0089  *
0090  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
0091  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
0092  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
0093  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
0094  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
0095  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
0096  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
0097  * LIMITED REMEDY.
0098  *
0099  * 4.3. Licensee shall not export, either directly or indirectly, any of this
0100  * software or system incorporating such software without first obtaining any
0101  * required license or other approval from the U. S. Department of Commerce or
0102  * any other agency or department of the United States Government.  In the
0103  * event Licensee exports any such software from the United States or
0104  * re-exports any such software from a foreign destination, Licensee shall
0105  * ensure that the distribution and export/re-export of the software is in
0106  * compliance with all laws, regulations, orders, or other restrictions of the
0107  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
0108  * any of its subsidiaries will export/re-export any technical data, process,
0109  * software, or service, directly or indirectly, to any country for which the
0110  * United States government or any agency thereof requires an export license,
0111  * other governmental approval, or letter of assurance, without first obtaining
0112  * such license, approval or letter.
0113  *
0114  *****************************************************************************/
0115
0116
0117 #define __EVRGNINI_C__
0118
0119 #include "acpi.h"
0120 #include "accommon.h"
0121 #include "acevents.h"
0122 #include "acnamesp.h"
0123
0124 #define _COMPONENT          ACPI_EVENTS
0125         ACPI_MODULE_NAME    ("evrgnini")
0126
0127 /* Local prototypes */
0128
0129 static BOOLEAN
0130 AcpiEvIsPciRootBridge (
0131     ACPI_NAMESPACE_NODE     *Node);
0132
0133
0134 /*******************************************************************************
0135  *
0136  * FUNCTION:    AcpiEvSystemMemoryRegionSetup
0137  *
0138  * PARAMETERS:  Handle              - Region we are interested in
0139  *              Function            - Start or stop
0140  *              HandlerContext      - Address space handler context
0141  *              RegionContext       - Region specific context
0142  *
0143  * RETURN:      Status
0144  *
0145  * DESCRIPTION: Setup a SystemMemory operation region
0146  *
0147  ******************************************************************************/
0148
0149 ACPI_STATUS
0150 AcpiEvSystemMemoryRegionSetup (
0151     ACPI_HANDLE             Handle,
0152     UINT32                  Function,
0153     void                    *HandlerContext,
0154     void                    **RegionContext)
0155 {
0156     ACPI_OPERAND_OBJECT     *RegionDesc = (ACPI_OPERAND_OBJECT *) Handle;
0157     ACPI_MEM_SPACE_CONTEXT  *LocalRegionContext;
0158
0159
0160     ACPI_FUNCTION_TRACE (EvSystemMemoryRegionSetup);
0161
0162
0163     if (Function == ACPI_REGION_DEACTIVATE)
0164     {
0165         if (*RegionContext)
0166         {
0167             LocalRegionContext = (ACPI_MEM_SPACE_CONTEXT *) *RegionContext;
0168
0169             /* Delete a cached mapping if present */
0170
0171             if (LocalRegionContext->MappedLength)
0172             {
0173                 AcpiOsUnmapMemory (LocalRegionContext->MappedLogicalAddress,
0174                     LocalRegionContext->MappedLength);
0175             }
0176             ACPI_FREE (LocalRegionContext);
0177             *RegionContext = NULL;
0178         }
0179         return_ACPI_STATUS (AE_OK);
0180     }
0181
0182     /* Create a new context */
0183
0184     LocalRegionContext = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_MEM_SPACE_CONTEXT));
0185     if (!(LocalRegionContext))
0186     {
0187         return_ACPI_STATUS (AE_NO_MEMORY);
0188     }
0189
0190     /* Save the region length and address for use in the handler */
0191
0192     LocalRegionContext->Length  = RegionDesc->Region.Length;
0193     LocalRegionContext->Address = RegionDesc->Region.Address;
0194
0195     *RegionContext = LocalRegionContext;
0196     return_ACPI_STATUS (AE_OK);
0197 }
0198
0199
0200 /*******************************************************************************
0201  *
0202  * FUNCTION:    AcpiEvIoSpaceRegionSetup
0203  *
0204  * PARAMETERS:  Handle              - Region we are interested in
0205  *              Function            - Start or stop
0206  *              HandlerContext      - Address space handler context
0207  *              RegionContext       - Region specific context
0208  *
0209  * RETURN:      Status
0210  *
0211  * DESCRIPTION: Setup a IO operation region
0212  *
0213  ******************************************************************************/
0214
0215 ACPI_STATUS
0216 AcpiEvIoSpaceRegionSetup (
0217     ACPI_HANDLE             Handle,
0218     UINT32                  Function,
0219     void                    *HandlerContext,
0220     void                    **RegionContext)
0221 {
0222     ACPI_FUNCTION_TRACE (EvIoSpaceRegionSetup);
0223
0224
0225     if (Function == ACPI_REGION_DEACTIVATE)
0226     {
0227         *RegionContext = NULL;
0228     }
0229     else
0230     {
0231         *RegionContext = HandlerContext;
0232     }
0233
0234     return_ACPI_STATUS (AE_OK);
0235 }
0236
0237
0238 /*******************************************************************************
0239  *
0240  * FUNCTION:    AcpiEvPciConfigRegionSetup
0241  *
0242  * PARAMETERS:  Handle              - Region we are interested in
0243  *              Function            - Start or stop
0244  *              HandlerContext      - Address space handler context
0245  *              RegionContext       - Region specific context
0246  *
0247  * RETURN:      Status
0248  *
0249  * DESCRIPTION: Setup a PCI_Config operation region
0250  *
0251  * MUTEX:       Assumes namespace is not locked
0252  *
0253  ******************************************************************************/
0254
0255 ACPI_STATUS
0256 AcpiEvPciConfigRegionSetup (
0257     ACPI_HANDLE             Handle,
0258     UINT32                  Function,
0259     void                    *HandlerContext,
0260     void                    **RegionContext)
0261 {
0262     ACPI_STATUS             Status = AE_OK;
0263     ACPI_INTEGER            PciValue;
0264     ACPI_PCI_ID             *PciId = *RegionContext;
0265     ACPI_OPERAND_OBJECT     *HandlerObj;
0266     ACPI_NAMESPACE_NODE     *ParentNode;
0267     ACPI_NAMESPACE_NODE     *PciRootNode;
0268     ACPI_NAMESPACE_NODE     *PciDeviceNode;
0269     ACPI_OPERAND_OBJECT     *RegionObj = (ACPI_OPERAND_OBJECT  *) Handle;
0270
0271
0272     ACPI_FUNCTION_TRACE (EvPciConfigRegionSetup);
0273
0274
0275     HandlerObj = RegionObj->Region.Handler;
0276     if (!HandlerObj)
0277     {
0278         /*
0279          * No installed handler. This shouldn't happen because the dispatch
0280          * routine checks before we get here, but we check again just in case.
0281          */
0282         ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
0283             "Attempting to init a region %p, with no handler\n", RegionObj));
0284         return_ACPI_STATUS (AE_NOT_EXIST);
0285     }
0286
0287     *RegionContext = NULL;
0288     if (Function == ACPI_REGION_DEACTIVATE)
0289     {
0290         if (PciId)
0291         {
0292             ACPI_FREE (PciId);
0293         }
0294         return_ACPI_STATUS (Status);
0295     }
0296
0297     ParentNode = AcpiNsGetParentNode (RegionObj->Region.Node);
0298
0299     /*
0300      * Get the _SEG and _BBN values from the device upon which the handler
0301      * is installed.
0302      *
0303      * We need to get the _SEG and _BBN objects relative to the PCI BUS device.
0304      * This is the device the handler has been registered to handle.
0305      */
0306
0307     /*
0308      * If the AddressSpace.Node is still pointing to the root, we need
0309      * to scan upward for a PCI Root bridge and re-associate the OpRegion
0310      * handlers with that device.
0311      */
0312     if (HandlerObj->AddressSpace.Node == AcpiGbl_RootNode)
0313     {
0314         /* Start search from the parent object */
0315
0316         PciRootNode = ParentNode;
0317         while (PciRootNode != AcpiGbl_RootNode)
0318         {
0319             /* Get the _HID/_CID in order to detect a RootBridge */
0320
0321             if (AcpiEvIsPciRootBridge (PciRootNode))
0322             {
0323                 /* Install a handler for this PCI root bridge */
0324
0325                 Status = AcpiInstallAddressSpaceHandler (
0326                             (ACPI_HANDLE) PciRootNode,
0327                             ACPI_ADR_SPACE_PCI_CONFIG,
0328                             ACPI_DEFAULT_HANDLER, NULL, NULL);
0329                 if (ACPI_FAILURE (Status))
0330                 {
0331                     if (Status == AE_SAME_HANDLER)
0332                     {
0333                         /*
0334                          * It is OK if the handler is already installed on the
0335                          * root bridge. Still need to return a context object
0336                          * for the new PCI_Config operation region, however.
0337                          */
0338                         Status = AE_OK;
0339                     }
0340                     else
0341                     {
0342                         ACPI_EXCEPTION ((AE_INFO, Status,
0343                             "Could not install PciConfig handler "
0344                             "for Root Bridge %4.4s",
0345                             AcpiUtGetNodeName (PciRootNode)));
0346                     }
0347                 }
0348                 break;
0349             }
0350
0351             PciRootNode = AcpiNsGetParentNode (PciRootNode);
0352         }
0353
0354         /* PCI root bridge not found, use namespace root node */
0355     }
0356     else
0357     {
0358         PciRootNode = HandlerObj->AddressSpace.Node;
0359     }
0360
0361     /*
0362      * If this region is now initialized, we are done.
0363      * (InstallAddressSpaceHandler could have initialized it)
0364      */
0365     if (RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE)
0366     {
0367         return_ACPI_STATUS (AE_OK);
0368     }
0369
0370     /* Region is still not initialized. Create a new context */
0371
0372     PciId = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_PCI_ID));
0373     if (!PciId)
0374     {
0375         return_ACPI_STATUS (AE_NO_MEMORY);
0376     }
0377
0378     /*
0379      * For PCI_Config space access, we need the segment, bus, device and
0380      * function numbers. Acquire them here.
0381      *
0382      * Find the parent device object. (This allows the operation region to be
0383      * within a subscope under the device, such as a control method.)
0384      */
0385     PciDeviceNode = RegionObj->Region.Node;
0386     while (PciDeviceNode && (PciDeviceNode->Type != ACPI_TYPE_DEVICE))
0387     {
0388         PciDeviceNode = AcpiNsGetParentNode (PciDeviceNode);
0389     }
0390
0391     if (!PciDeviceNode)
0392     {
0393         ACPI_FREE (PciId);
0394         return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
0395     }
0396
0397     /*
0398      * Get the PCI device and function numbers from the _ADR object contained
0399      * in the parent's scope.
0400      */
0401     Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR,
0402                 PciDeviceNode, &PciValue);
0403
0404     /*
0405      * The default is zero, and since the allocation above zeroed the data,
0406      * just do nothing on failure.
0407      */
0408     if (ACPI_SUCCESS (Status))
0409     {
0410         PciId->Device   = ACPI_HIWORD (ACPI_LODWORD (PciValue));
0411         PciId->Function = ACPI_LOWORD (ACPI_LODWORD (PciValue));
0412     }
0413
0414     /* The PCI segment number comes from the _SEG method */
0415
0416     Status = AcpiUtEvaluateNumericObject (METHOD_NAME__SEG,
0417                 PciRootNode, &PciValue);
0418     if (ACPI_SUCCESS (Status))
0419     {
0420         PciId->Segment = ACPI_LOWORD (PciValue);
0421     }
0422
0423     /* The PCI bus number comes from the _BBN method */
0424
0425     Status = AcpiUtEvaluateNumericObject (METHOD_NAME__BBN,
0426                 PciRootNode, &PciValue);
0427     if (ACPI_SUCCESS (Status))
0428     {
0429         PciId->Bus = ACPI_LOWORD (PciValue);
0430     }
0431
0432     /* Complete this device's PciId */
0433
0434     AcpiOsDerivePciId (PciRootNode, RegionObj->Region.Node, &PciId);
0435
0436     *RegionContext = PciId;
0437     return_ACPI_STATUS (AE_OK);
0438 }
0439
0440
0441 /*******************************************************************************
0442  *
0443  * FUNCTION:    AcpiEvIsPciRootBridge
0444  *
0445  * PARAMETERS:  Node            - Device node being examined
0446  *
0447  * RETURN:      TRUE if device is a PCI/PCI-Express Root Bridge
0448  *
0449  * DESCRIPTION: Determine if the input device represents a PCI Root Bridge by
0450  *              examining the _HID and _CID for the device.
0451  *
0452  ******************************************************************************/
0453
0454 static BOOLEAN
0455 AcpiEvIsPciRootBridge (
0456     ACPI_NAMESPACE_NODE     *Node)
0457 {
0458     ACPI_STATUS             Status;
0459     ACPI_DEVICE_ID          *Hid;
0460     ACPI_DEVICE_ID_LIST     *Cid;
0461     UINT32                  i;
0462     BOOLEAN                 Match;
0463
0464
0465     /* Get the _HID and check for a PCI Root Bridge */
0466
0467     Status = AcpiUtExecute_HID (Node, &Hid);
0468     if (ACPI_FAILURE (Status))
0469     {
0470         return (FALSE);
0471     }
0472
0473     Match = AcpiUtIsPciRootBridge (Hid->String);
0474     ACPI_FREE (Hid);
0475
0476     if (Match)
0477     {
0478         return (TRUE);
0479     }
0480
0481     /* The _HID did not match. Get the _CID and check for a PCI Root Bridge */
0482
0483     Status = AcpiUtExecute_CID (Node, &Cid);
0484     if (ACPI_FAILURE (Status))
0485     {
0486         return (FALSE);
0487     }
0488
0489     /* Check all _CIDs in the returned list */
0490
0491     for (i = 0; i < Cid->Count; i++)
0492     {
0493         if (AcpiUtIsPciRootBridge (Cid->Ids[i].String))
0494         {
0495             ACPI_FREE (Cid);
0496             return (TRUE);
0497         }
0498     }
0499
0500     ACPI_FREE (Cid);
0501     return (FALSE);
0502 }
0503
0504
0505 /*******************************************************************************
0506  *
0507  * FUNCTION:    AcpiEvPciBarRegionSetup
0508  *
0509  * PARAMETERS:  Handle              - Region we are interested in
0510  *              Function            - Start or stop
0511  *              HandlerContext      - Address space handler context
0512  *              RegionContext       - Region specific context
0513  *
0514  * RETURN:      Status
0515  *
0516  * DESCRIPTION: Setup a PciBAR operation region
0517  *
0518  * MUTEX:       Assumes namespace is not locked
0519  *
0520  ******************************************************************************/
0521
0522 ACPI_STATUS
0523 AcpiEvPciBarRegionSetup (
0524     ACPI_HANDLE             Handle,
0525     UINT32                  Function,
0526     void                    *HandlerContext,
0527     void                    **RegionContext)
0528 {
0529     ACPI_FUNCTION_TRACE (EvPciBarRegionSetup);
0530
0531
0532     return_ACPI_STATUS (AE_OK);
0533 }
0534
0535
0536 /*******************************************************************************
0537  *
0538  * FUNCTION:    AcpiEvCmosRegionSetup
0539  *
0540  * PARAMETERS:  Handle              - Region we are interested in
0541  *              Function            - Start or stop
0542  *              HandlerContext      - Address space handler context
0543  *              RegionContext       - Region specific context
0544  *
0545  * RETURN:      Status
0546  *
0547  * DESCRIPTION: Setup a CMOS operation region
0548  *
0549  * MUTEX:       Assumes namespace is not locked
0550  *
0551  ******************************************************************************/
0552
0553 ACPI_STATUS
0554 AcpiEvCmosRegionSetup (
0555     ACPI_HANDLE             Handle,
0556     UINT32                  Function,
0557     void                    *HandlerContext,
0558     void                    **RegionContext)
0559 {
0560     ACPI_FUNCTION_TRACE (EvCmosRegionSetup);
0561
0562
0563     return_ACPI_STATUS (AE_OK);
0564 }
0565
0566
0567 /*******************************************************************************
0568  *
0569  * FUNCTION:    AcpiEvDefaultRegionSetup
0570  *
0571  * PARAMETERS:  Handle              - Region we are interested in
0572  *              Function            - Start or stop
0573  *              HandlerContext      - Address space handler context
0574  *              RegionContext       - Region specific context
0575  *
0576  * RETURN:      Status
0577  *
0578  * DESCRIPTION: Default region initialization
0579  *
0580  ******************************************************************************/
0581
0582 ACPI_STATUS
0583 AcpiEvDefaultRegionSetup (
0584     ACPI_HANDLE             Handle,
0585     UINT32                  Function,
0586     void                    *HandlerContext,
0587     void                    **RegionContext)
0588 {
0589     ACPI_FUNCTION_TRACE (EvDefaultRegionSetup);
0590
0591
0592     if (Function == ACPI_REGION_DEACTIVATE)
0593     {
0594         *RegionContext = NULL;
0595     }
0596     else
0597     {
0598         *RegionContext = HandlerContext;
0599     }
0600
0601     return_ACPI_STATUS (AE_OK);
0602 }
0603
0604
0605 /*******************************************************************************
0606  *
0607  * FUNCTION:    AcpiEvInitializeRegion
0608  *
0609  * PARAMETERS:  RegionObj       - Region we are initializing
0610  *              AcpiNsLocked    - Is namespace locked?
0611  *
0612  * RETURN:      Status
0613  *
0614  * DESCRIPTION: Initializes the region, finds any _REG methods and saves them
0615  *              for execution at a later time
0616  *
0617  *              Get the appropriate address space handler for a newly
0618  *              created region.
0619  *
0620  *              This also performs address space specific initialization. For
0621  *              example, PCI regions must have an _ADR object that contains
0622  *              a PCI address in the scope of the definition. This address is
0623  *              required to perform an access to PCI config space.
0624  *
0625  * MUTEX:       Interpreter should be unlocked, because we may run the _REG
0626  *              method for this region.
0627  *
0628  ******************************************************************************/
0629
0630 ACPI_STATUS
0631 AcpiEvInitializeRegion (
0632     ACPI_OPERAND_OBJECT     *RegionObj,
0633     BOOLEAN                 AcpiNsLocked)
0634 {
0635     ACPI_OPERAND_OBJECT     *HandlerObj;
0636     ACPI_OPERAND_OBJECT     *ObjDesc;
0637     ACPI_ADR_SPACE_TYPE     SpaceId;
0638     ACPI_NAMESPACE_NODE     *Node;
0639     ACPI_STATUS             Status;
0640     ACPI_NAMESPACE_NODE     *MethodNode;
0641     ACPI_NAME               *RegNamePtr = (ACPI_NAME *) METHOD_NAME__REG;
0642     ACPI_OPERAND_OBJECT     *RegionObj2;
0643
0644
0645     ACPI_FUNCTION_TRACE_U32 (EvInitializeRegion, AcpiNsLocked);
0646
0647
0648     if (!RegionObj)
0649     {
0650         return_ACPI_STATUS (AE_BAD_PARAMETER);
0651     }
0652
0653     if (RegionObj->Common.Flags & AOPOBJ_OBJECT_INITIALIZED)
0654     {
0655         return_ACPI_STATUS (AE_OK);
0656     }
0657
0658     RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
0659     if (!RegionObj2)
0660     {
0661         return_ACPI_STATUS (AE_NOT_EXIST);
0662     }
0663
0664     Node = AcpiNsGetParentNode (RegionObj->Region.Node);
0665     SpaceId = RegionObj->Region.SpaceId;
0666
0667     /* Setup defaults */
0668
0669     RegionObj->Region.Handler = NULL;
0670     RegionObj2->Extra.Method_REG = NULL;
0671     RegionObj->Common.Flags &= ~(AOPOBJ_SETUP_COMPLETE);
0672     RegionObj->Common.Flags |= AOPOBJ_OBJECT_INITIALIZED;
0673
0674     /* Find any "_REG" method associated with this region definition */
0675
0676     Status = AcpiNsSearchOneScope (
0677                 *RegNamePtr, Node, ACPI_TYPE_METHOD, &MethodNode);
0678     if (ACPI_SUCCESS (Status))
0679     {
0680         /*
0681          * The _REG method is optional and there can be only one per region
0682          * definition. This will be executed when the handler is attached
0683          * or removed
0684          */
0685         RegionObj2->Extra.Method_REG = MethodNode;
0686     }
0687
0688     /*
0689      * The following loop depends upon the root Node having no parent
0690      * ie: AcpiGbl_RootNode->ParentEntry being set to NULL
0691      */
0692     while (Node)
0693     {
0694         /* Check to see if a handler exists */
0695
0696         HandlerObj = NULL;
0697         ObjDesc = AcpiNsGetAttachedObject (Node);
0698         if (ObjDesc)
0699         {
0700             /* Can only be a handler if the object exists */
0701
0702             switch (Node->Type)
0703             {
0704             case ACPI_TYPE_DEVICE:
0705
0706                 HandlerObj = ObjDesc->Device.Handler;
0707                 break;
0708
0709             case ACPI_TYPE_PROCESSOR:
0710
0711                 HandlerObj = ObjDesc->Processor.Handler;
0712                 break;
0713
0714             case ACPI_TYPE_THERMAL:
0715
0716                 HandlerObj = ObjDesc->ThermalZone.Handler;
0717                 break;
0718
0719             default:
0720                 /* Ignore other objects */
0721                 break;
0722             }
0723
0724             while (HandlerObj)
0725             {
0726                 /* Is this handler of the correct type? */
0727
0728                 if (HandlerObj->AddressSpace.SpaceId == SpaceId)
0729                 {
0730                     /* Found correct handler */
0731
0732                     ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
0733                         "Found handler %p for region %p in obj %p\n",
0734                         HandlerObj, RegionObj, ObjDesc));
0735
0736                     Status = AcpiEvAttachRegion (HandlerObj, RegionObj,
0737                                 AcpiNsLocked);
0738
0739                     /*
0740                      * Tell all users that this region is usable by
0741                      * running the _REG method
0742                      */
0743                     if (AcpiNsLocked)
0744                     {
0745                         Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
0746                         if (ACPI_FAILURE (Status))
0747                         {
0748                             return_ACPI_STATUS (Status);
0749                         }
0750                     }
0751
0752                     Status = AcpiEvExecuteRegMethod (RegionObj, 1);
0753
0754                     if (AcpiNsLocked)
0755                     {
0756                         Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
0757                         if (ACPI_FAILURE (Status))
0758                         {
0759                             return_ACPI_STATUS (Status);
0760                         }
0761                     }
0762
0763                     return_ACPI_STATUS (AE_OK);
0764                 }
0765
0766                 /* Try next handler in the list */
0767
0768                 HandlerObj = HandlerObj->AddressSpace.Next;
0769             }
0770         }
0771
0772         /* This node does not have the handler we need; Pop up one level */
0773
0774         Node = AcpiNsGetParentNode (Node);
0775     }
0776
0777     /* If we get here, there is no handler for this region */
0778
0779     ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
0780         "No handler for RegionType %s(%X) (RegionObj %p)\n",
0781         AcpiUtGetRegionName (SpaceId), SpaceId, RegionObj));
0782
0783     return_ACPI_STATUS (AE_NOT_EXIST);
0784 }
0785