738 lines
		
	
	
		
			24 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
			
		
		
	
	
			738 lines
		
	
	
		
			24 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
| /******************************************************************************
 | |
|  *
 | |
|  * Module Name: nsinit - namespace initialization
 | |
|  *
 | |
|  *****************************************************************************/
 | |
| 
 | |
| /******************************************************************************
 | |
|  *
 | |
|  * 1. Copyright Notice
 | |
|  *
 | |
|  * Some or all of this work - Copyright (c) 1999 - 2010, Intel Corp.
 | |
|  * All rights reserved.
 | |
|  *
 | |
|  * 2. License
 | |
|  *
 | |
|  * 2.1. This is your license from Intel Corp. under its intellectual property
 | |
|  * rights.  You may have additional license terms from the party that provided
 | |
|  * you this software, covering your right to use that party's intellectual
 | |
|  * property rights.
 | |
|  *
 | |
|  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
 | |
|  * copy of the source code appearing in this file ("Covered Code") an
 | |
|  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
 | |
|  * base code distributed originally by Intel ("Original Intel Code") to copy,
 | |
|  * make derivatives, distribute, use and display any portion of the Covered
 | |
|  * Code in any form, with the right to sublicense such rights; and
 | |
|  *
 | |
|  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
 | |
|  * license (with the right to sublicense), under only those claims of Intel
 | |
|  * patents that are infringed by the Original Intel Code, to make, use, sell,
 | |
|  * offer to sell, and import the Covered Code and derivative works thereof
 | |
|  * solely to the minimum extent necessary to exercise the above copyright
 | |
|  * license, and in no event shall the patent license extend to any additions
 | |
|  * to or modifications of the Original Intel Code.  No other license or right
 | |
|  * is granted directly or by implication, estoppel or otherwise;
 | |
|  *
 | |
|  * The above copyright and patent license is granted only if the following
 | |
|  * conditions are met:
 | |
|  *
 | |
|  * 3. Conditions
 | |
|  *
 | |
|  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
 | |
|  * Redistribution of source code of any substantial portion of the Covered
 | |
|  * Code or modification with rights to further distribute source must include
 | |
|  * the above Copyright Notice, the above License, this list of Conditions,
 | |
|  * and the following Disclaimer and Export Compliance provision.  In addition,
 | |
|  * Licensee must cause all Covered Code to which Licensee contributes to
 | |
|  * contain a file documenting the changes Licensee made to create that Covered
 | |
|  * Code and the date of any change.  Licensee must include in that file the
 | |
|  * documentation of any changes made by any predecessor Licensee.  Licensee
 | |
|  * must include a prominent statement that the modification is derived,
 | |
|  * directly or indirectly, from Original Intel Code.
 | |
|  *
 | |
|  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
 | |
|  * Redistribution of source code of any substantial portion of the Covered
 | |
|  * Code or modification without rights to further distribute source must
 | |
|  * include the following Disclaimer and Export Compliance provision in the
 | |
|  * documentation and/or other materials provided with distribution.  In
 | |
|  * addition, Licensee may not authorize further sublicense of source of any
 | |
|  * portion of the Covered Code, and must include terms to the effect that the
 | |
|  * license from Licensee to its licensee is limited to the intellectual
 | |
|  * property embodied in the software Licensee provides to its licensee, and
 | |
|  * not to intellectual property embodied in modifications its licensee may
 | |
|  * make.
 | |
|  *
 | |
|  * 3.3. Redistribution of Executable. Redistribution in executable form of any
 | |
|  * substantial portion of the Covered Code or modification must reproduce the
 | |
|  * above Copyright Notice, and the following Disclaimer and Export Compliance
 | |
|  * provision in the documentation and/or other materials provided with the
 | |
|  * distribution.
 | |
|  *
 | |
|  * 3.4. Intel retains all right, title, and interest in and to the Original
 | |
|  * Intel Code.
 | |
|  *
 | |
|  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
 | |
|  * Intel shall be used in advertising or otherwise to promote the sale, use or
 | |
|  * other dealings in products derived from or relating to the Covered Code
 | |
|  * without prior written authorization from Intel.
 | |
|  *
 | |
|  * 4. Disclaimer and Export Compliance
 | |
|  *
 | |
|  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
 | |
|  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
 | |
|  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
 | |
|  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
 | |
|  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
 | |
|  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
 | |
|  * PARTICULAR PURPOSE.
 | |
|  *
 | |
|  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
 | |
|  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
 | |
|  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
 | |
|  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
 | |
|  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
 | |
|  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
 | |
|  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
 | |
|  * LIMITED REMEDY.
 | |
|  *
 | |
|  * 4.3. Licensee shall not export, either directly or indirectly, any of this
 | |
|  * software or system incorporating such software without first obtaining any
 | |
|  * required license or other approval from the U. S. Department of Commerce or
 | |
|  * any other agency or department of the United States Government.  In the
 | |
|  * event Licensee exports any such software from the United States or
 | |
|  * re-exports any such software from a foreign destination, Licensee shall
 | |
|  * ensure that the distribution and export/re-export of the software is in
 | |
|  * compliance with all laws, regulations, orders, or other restrictions of the
 | |
|  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
 | |
|  * any of its subsidiaries will export/re-export any technical data, process,
 | |
|  * software, or service, directly or indirectly, to any country for which the
 | |
|  * United States government or any agency thereof requires an export license,
 | |
|  * other governmental approval, or letter of assurance, without first obtaining
 | |
|  * such license, approval or letter.
 | |
|  *
 | |
|  *****************************************************************************/
 | |
| 
 | |
| 
 | |
| #define __NSXFINIT_C__
 | |
| 
 | |
| #include "acpi.h"
 | |
| #include "accommon.h"
 | |
| #include "acnamesp.h"
 | |
| #include "acdispat.h"
 | |
| #include "acinterp.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_DISPATCH,
 | |
|         "**** Starting initialization of namespace objects ****\n"));
 | |
|     ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
 | |
|         "Completing Region/Field/Buffer/Package initialization:"));
 | |
| 
 | |
|     /* Set all init info to zero */
 | |
| 
 | |
|     ACPI_MEMSET (&Info, 0, sizeof (ACPI_INIT_WALK_INFO));
 | |
| 
 | |
|     /* Walk entire namespace from the supplied root */
 | |
| 
 | |
|     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,
 | |
|         "\nInitialized %u/%u Regions %u/%u Fields %u/%u "
 | |
|         "Buffers %u/%u Packages (%u nodes)\n",
 | |
|         Info.OpRegionInit,  Info.OpRegionCount,
 | |
|         Info.FieldInit,     Info.FieldCount,
 | |
|         Info.BufferInit,    Info.BufferCount,
 | |
|         Info.PackageInit,   Info.PackageCount, Info.ObjectCount));
 | |
| 
 | |
|     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 | |
|         "%u Control Methods found\n", Info.MethodCount));
 | |
|     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 | |
|         "%u Op Regions found\n", 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 (
 | |
|     void)
 | |
| {
 | |
|     ACPI_STATUS             Status;
 | |
|     ACPI_DEVICE_WALK_INFO   Info;
 | |
| 
 | |
| 
 | |
|     ACPI_FUNCTION_TRACE (NsInitializeDevices);
 | |
| 
 | |
| 
 | |
|     /* 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 "
 | |
|         "by executing _INI methods:"));
 | |
| 
 | |
|     /* 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->Pathname = 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++;
 | |
|     }
 | |
| 
 | |
|     /* 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,
 | |
|         "\nExecuted %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:    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 ();
 | |
| 
 | |
|     /*
 | |
|      * Each of these types can contain executable AML code within the
 | |
|      * declaration.
 | |
|      */
 | |
|     switch (Type)
 | |
|     {
 | |
|     case ACPI_TYPE_REGION:
 | |
| 
 | |
|         Info->OpRegionInit++;
 | |
|         Status = AcpiDsGetRegionArguments (ObjDesc);
 | |
|         break;
 | |
| 
 | |
|     case ACPI_TYPE_BUFFER_FIELD:
 | |
| 
 | |
|         Info->FieldInit++;
 | |
|         Status = AcpiDsGetBufferFieldArguments (ObjDesc);
 | |
|         break;
 | |
| 
 | |
|     case ACPI_TYPE_LOCAL_BANK_FIELD:
 | |
| 
 | |
|         Info->FieldInit++;
 | |
|         Status = AcpiDsGetBankFieldArguments (ObjDesc);
 | |
|         break;
 | |
| 
 | |
|     case ACPI_TYPE_BUFFER:
 | |
| 
 | |
|         Info->BufferInit++;
 | |
|         Status = AcpiDsGetBufferArguments (ObjDesc);
 | |
|         break;
 | |
| 
 | |
|     case ACPI_TYPE_PACKAGE:
 | |
| 
 | |
|         Info->PackageInit++;
 | |
|         Status = AcpiDsGetPackageArguments (ObjDesc);
 | |
|         break;
 | |
| 
 | |
|     default:
 | |
|         /* No other types can get here */
 | |
|         break;
 | |
|     }
 | |
| 
 | |
|     if (ACPI_FAILURE (Status))
 | |
|     {
 | |
|         ACPI_EXCEPTION ((AE_INFO, Status,
 | |
|             "Could not execute arguments for [%4.4s] (%s)",
 | |
|             AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Type)));
 | |
|     }
 | |
| 
 | |
|     /*
 | |
|      * Print a dot for each object unless we are going to print the entire
 | |
|      * pathname
 | |
|      */
 | |
|     if (!(AcpiDbgLevel & ACPI_LV_INIT_NAMES))
 | |
|     {
 | |
|         ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "."));
 | |
|     }
 | |
| 
 | |
|     /*
 | |
|      * 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_NAME (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.
 | |
|      */
 | |
|     ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname (
 | |
|         ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__INI));
 | |
| 
 | |
|     Info->PrefixNode = DeviceNode;
 | |
|     Info->Pathname = METHOD_NAME__INI;
 | |
|     Info->Parameters = NULL;
 | |
|     Info->Flags = ACPI_IGNORE_RETURN_VALUE;
 | |
| 
 | |
|     Status = AcpiNsEvaluate (Info);
 | |
|     if (ACPI_SUCCESS (Status))
 | |
|     {
 | |
|         WalkInfo->Num_INI++;
 | |
| 
 | |
|         if ((AcpiDbgLevel <= ACPI_LV_ALL_EXCEPTIONS) &&
 | |
|             (!(AcpiDbgLevel & ACPI_LV_INFO)))
 | |
|         {
 | |
|             ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "."));
 | |
|         }
 | |
|     }
 | |
| 
 | |
| #ifdef ACPI_DEBUG_OUTPUT
 | |
|     else if (Status != AE_NOT_FOUND)
 | |
|     {
 | |
|         /* Ignore error and move on to next device */
 | |
| 
 | |
|         char *ScopeName = AcpiNsGetExternalPathname (Info->ResolvedNode);
 | |
| 
 | |
|         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);
 | |
| }
 | 
