ACPI_STATUS
AcpiDsMethodError (
ACPI_STATUS Status,
ACPI_WALK_STATE *WalkState)
{
ACPI_FUNCTION_ENTRY ();
/* Ignore AE_OK and control exception codes */
if (ACPI_SUCCESS (Status) ||
(Status & AE_CODE_CONTROL))
{
return (Status);
}
/* Invoke the global exception handler */
if (AcpiGbl_ExceptionHandler)
{
/* Exit the interpreter, allow handler to execute methods */
AcpiExExitInterpreter ();
/*
* Handler can map the exception code to anything it wants, including
* AE_OK, in which case the executing method will not be aborted.
*/
Status = AcpiGbl_ExceptionHandler (Status,
WalkState->MethodNode ?
WalkState->MethodNode->Name.Integer : 0,
WalkState->Opcode, WalkState->AmlOffset, NULL);
AcpiExEnterInterpreter ();
}
AcpiDsClearImplicitReturn (WalkState);
#ifdef ACPI_DISASSEMBLER
if (ACPI_FAILURE (Status))
{
/* Display method locals/args if disassembler is present */
AcpiDmDumpMethodInfo (Status, WalkState, WalkState->Op);
}
#endif
return (Status);
}
//.........这里部分代码省略.........
Status = AE_TYPE;
goto Cleanup;
case ACPI_TYPE_METHOD:
/*
* 2) Object is a control method - execute it
*/
/* Verify that there is a method object associated with this node */
if (!Info->ObjDesc)
{
ACPI_ERROR ((AE_INFO, "%s: Method has no attached sub-object",
Info->FullPathname));
Status = AE_NULL_OBJECT;
goto Cleanup;
}
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"**** Execute method [%s] at AML address %p length %X\n",
Info->FullPathname,
Info->ObjDesc->Method.AmlStart + 1,
Info->ObjDesc->Method.AmlLength - 1));
/*
* Any namespace deletion must acquire both the namespace and
* interpreter locks to ensure that no thread is using the portion of
* the namespace that is being deleted.
*
* Execute the method via the interpreter. The interpreter is locked
* here before calling into the AML parser
*/
AcpiExEnterInterpreter ();
Status = AcpiPsExecuteMethod (Info);
AcpiExExitInterpreter ();
break;
default:
/*
* 3) All other non-method objects -- get the current object value
*/
/*
* Some objects require additional resolution steps (e.g., the Node
* may be a field that must be read, etc.) -- we can't just grab
* the object out of the node.
*
* Use ResolveNodeToValue() to get the associated value.
*
* NOTE: we can get away with passing in NULL for a walk state because
* the Node is guaranteed to not be a reference to either a method
* local or a method argument (because this interface is never called
* from a running method.)
*
* Even though we do not directly invoke the interpreter for object
* resolution, we must lock it because we could access an OpRegion.
* The OpRegion access code assumes that the interpreter is locked.
*/
AcpiExEnterInterpreter ();
/* TBD: ResolveNodeToValue has a strange interface, fix */
Info->ReturnObject = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Info->Node);
Status = AcpiExResolveNodeToValue (ACPI_CAST_INDIRECT_PTR (
ACPI_STATUS
AcpiNsLoadTable (
UINT32 TableIndex,
ACPI_NAMESPACE_NODE *Node)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (NsLoadTable);
/* If table already loaded into namespace, just return */
if (AcpiTbIsTableLoaded (TableIndex))
{
Status = AE_ALREADY_EXISTS;
goto Unlock;
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"**** Loading table into namespace ****\n"));
Status = AcpiTbAllocateOwnerId (TableIndex);
if (ACPI_FAILURE (Status))
{
goto Unlock;
}
/*
* Parse the table and load the namespace with all named
* objects found within. Control methods are NOT parsed
* at this time. In fact, the control methods cannot be
* parsed until the entire namespace is loaded, because
* if a control method makes a forward reference (call)
* to another control method, we can't continue parsing
* because we don't know how many arguments to parse next!
*/
Status = AcpiNsParseTable (TableIndex, Node);
if (ACPI_SUCCESS (Status))
{
AcpiTbSetTableLoadedFlag (TableIndex, TRUE);
}
else
{
/*
* On error, delete any namespace objects created by this table.
* We cannot initialize these objects, so delete them. There are
* a couple of expecially bad cases:
* AE_ALREADY_EXISTS - namespace collision.
* AE_NOT_FOUND - the target of a Scope operator does not
* exist. This target of Scope must already exist in the
* namespace, as per the ACPI specification.
*/
AcpiNsDeleteNamespaceByOwner (
AcpiGbl_RootTableList.Tables[TableIndex].OwnerId);
AcpiTbReleaseOwnerId (TableIndex);
return_ACPI_STATUS (Status);
}
Unlock:
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* Now we can parse the control methods. We always parse
* them here for a sanity check, and if configured for
* just-in-time parsing, we delete the control method
* parse trees.
*/
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"**** Begin Table Object Initialization\n"));
AcpiExEnterInterpreter ();
Status = AcpiDsInitializeObjects (TableIndex, Node);
AcpiExExitInterpreter ();
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"**** Completed Table Object Initialization\n"));
/*
* Execute any module-level code that was detected during the table load
* phase. Although illegal since ACPI 2.0, there are many machines that
* contain this type of code. Each block of detected executable AML code
* outside of any control method is wrapped with a temporary control
* method object and placed on a global list. The methods on this list
* are executed below.
*
* This case executes the module-level code for each table immediately
* after the table has been loaded. This provides compatibility with
* other ACPI implementations. Optionally, the execution can be deferred
* until later, see AcpiInitializeObjects.
*/
if (!AcpiGbl_ParseTableAsTermList && !AcpiGbl_GroupModuleLevelCode)
{
AcpiNsExecModuleCodeList ();
}
//.........这里部分代码省略.........
ACPI_STATUS
AcpiEvAddressSpaceDispatch (
ACPI_OPERAND_OBJECT *RegionObj,
UINT32 Function,
UINT32 RegionOffset,
UINT32 BitWidth,
UINT64 *Value)
{
ACPI_STATUS Status;
ACPI_ADR_SPACE_HANDLER Handler;
ACPI_ADR_SPACE_SETUP RegionSetup;
ACPI_OPERAND_OBJECT *HandlerDesc;
ACPI_OPERAND_OBJECT *RegionObj2;
void *RegionContext = NULL;
ACPI_FUNCTION_TRACE (EvAddressSpaceDispatch);
RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
if (!RegionObj2)
{
return_ACPI_STATUS (AE_NOT_EXIST);
}
/* Ensure that there is a handler associated with this region */
HandlerDesc = RegionObj->Region.Handler;
if (!HandlerDesc)
{
ACPI_ERROR ((AE_INFO,
"No handler for Region [%4.4s] (%p) [%s]",
AcpiUtGetNodeName (RegionObj->Region.Node),
RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
return_ACPI_STATUS (AE_NOT_EXIST);
}
/*
* It may be the case that the region has never been initialized.
* Some types of regions require special init code
*/
if (!(RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE))
{
/* This region has not been initialized yet, do it */
RegionSetup = HandlerDesc->AddressSpace.Setup;
if (!RegionSetup)
{
/* No initialization routine, exit with error */
ACPI_ERROR ((AE_INFO,
"No init routine for region(%p) [%s]",
RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
return_ACPI_STATUS (AE_NOT_EXIST);
}
/*
* We must exit the interpreter because the region setup will
* potentially execute control methods (for example, the _REG method
* for this region)
*/
AcpiExExitInterpreter ();
Status = RegionSetup (RegionObj, ACPI_REGION_ACTIVATE,
HandlerDesc->AddressSpace.Context, &RegionContext);
/* Re-enter the interpreter */
AcpiExEnterInterpreter ();
/* Check for failure of the Region Setup */
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"During region initialization: [%s]",
AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
return_ACPI_STATUS (Status);
}
/* Region initialization may have been completed by RegionSetup */
if (!(RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE))
{
RegionObj->Region.Flags |= AOPOBJ_SETUP_COMPLETE;
if (RegionObj2->Extra.RegionContext)
{
/* The handler for this region was already installed */
ACPI_FREE (RegionContext);
}
else
{
/*
* Save the returned context for use in all accesses to
* this particular region
*/
RegionObj2->Extra.RegionContext = RegionContext;
//.........这里部分代码省略.........
//.........这里部分代码省略.........
/* Now we can evaluate the object */
Status = AcpiNsEvaluate (Info);
/*
* If we are expecting a return value, and all went well above,
* copy the return value to an external object.
*/
if (ReturnBuffer)
{
if (!Info->ReturnObject)
{
ReturnBuffer->Length = 0;
}
else
{
if (ACPI_GET_DESCRIPTOR_TYPE (Info->ReturnObject) ==
ACPI_DESC_TYPE_NAMED)
{
/*
* If we received a NS Node as a return object, this means that
* the object we are evaluating has nothing interesting to
* return (such as a mutex, etc.) We return an error because
* these types are essentially unsupported by this interface.
* We don't check up front because this makes it easier to add
* support for various types at a later date if necessary.
*/
Status = AE_TYPE;
Info->ReturnObject = NULL; /* No need to delete a NS Node */
ReturnBuffer->Length = 0;
}
if (ACPI_SUCCESS (Status))
{
/* Dereference Index and RefOf references */
AcpiNsResolveReferences (Info);
/* Get the size of the returned object */
Status = AcpiUtGetObjectSize (Info->ReturnObject,
&BufferSpaceNeeded);
if (ACPI_SUCCESS (Status))
{
/* Validate/Allocate/Clear caller buffer */
Status = AcpiUtInitializeBuffer (ReturnBuffer,
BufferSpaceNeeded);
if (ACPI_FAILURE (Status))
{
/*
* Caller's buffer is too small or a new one can't
* be allocated
*/
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Needed buffer size %X, %s\n",
(UINT32) BufferSpaceNeeded,
AcpiFormatException (Status)));
}
else
{
/* We have enough space for the object, build it */
Status = AcpiUtCopyIobjectToEobject (
Info->ReturnObject, ReturnBuffer);
}
}
}
}
}
if (Info->ReturnObject)
{
/*
* Delete the internal return object. NOTE: Interpreter must be
* locked to avoid race condition.
*/
AcpiExEnterInterpreter ();
/* Remove one reference on the return object (should delete it) */
AcpiUtRemoveReference (Info->ReturnObject);
AcpiExExitInterpreter ();
}
Cleanup:
/* Free the input parameter list (if we created one) */
if (Info->Parameters)
{
/* Free the allocated parameter block */
AcpiUtDeleteInternalObjectList (Info->Parameters);
}
ACPI_FREE (Info);
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiNsLoadTable (
UINT32 TableIndex,
ACPI_NAMESPACE_NODE *Node)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (NsLoadTable);
/* If table already loaded into namespace, just return */
if (AcpiTbIsTableLoaded (TableIndex))
{
Status = AE_ALREADY_EXISTS;
goto Unlock;
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"**** Loading table into namespace ****\n"));
Status = AcpiTbAllocateOwnerId (TableIndex);
if (ACPI_FAILURE (Status))
{
goto Unlock;
}
/*
* Parse the table and load the namespace with all named
* objects found within. Control methods are NOT parsed
* at this time. In fact, the control methods cannot be
* parsed until the entire namespace is loaded, because
* if a control method makes a forward reference (call)
* to another control method, we can't continue parsing
* because we don't know how many arguments to parse next!
*/
Status = AcpiNsParseTable (TableIndex, Node);
if (ACPI_SUCCESS (Status))
{
AcpiTbSetTableLoadedFlag (TableIndex, TRUE);
}
else
{
/*
* On error, delete any namespace objects created by this table.
* We cannot initialize these objects, so delete them. There are
* a couple of expecially bad cases:
* AE_ALREADY_EXISTS - namespace collision.
* AE_NOT_FOUND - the target of a Scope operator does not
* exist. This target of Scope must already exist in the
* namespace, as per the ACPI specification.
*/
AcpiNsDeleteNamespaceByOwner (
AcpiGbl_RootTableList.Tables[TableIndex].OwnerId);
AcpiTbReleaseOwnerId (TableIndex);
return_ACPI_STATUS (Status);
}
Unlock:
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* Now we can parse the control methods. We always parse
* them here for a sanity check, and if configured for
* just-in-time parsing, we delete the control method
* parse trees.
*/
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"**** Begin Table Object Initialization\n"));
AcpiExEnterInterpreter ();
Status = AcpiDsInitializeObjects (TableIndex, Node);
AcpiExExitInterpreter ();
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"**** Completed Table Object Initialization\n"));
/*
* This case handles the legacy option that groups all module-level
* code blocks together and defers execution until all of the tables
* are loaded. Execute all of these blocks at this time.
* Execute any module-level code that was detected during the table
* load phase.
*
* Note: this option is deprecated and will be eliminated in the
* future. Use of this option can cause problems with AML code that
* depends upon in-order immediate execution of module-level code.
*/
AcpiNsExecModuleCodeList ();
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiEvAddressSpaceDispatch (
ACPI_OPERAND_OBJECT *RegionObj,
ACPI_OPERAND_OBJECT *FieldObj,
UINT32 Function,
UINT32 RegionOffset,
UINT32 BitWidth,
UINT64 *Value)
{
ACPI_STATUS Status;
ACPI_ADR_SPACE_HANDLER Handler;
ACPI_ADR_SPACE_SETUP RegionSetup;
ACPI_OPERAND_OBJECT *HandlerDesc;
ACPI_OPERAND_OBJECT *RegionObj2;
void *RegionContext = NULL;
ACPI_CONNECTION_INFO *Context;
ACPI_PHYSICAL_ADDRESS Address;
ACPI_FUNCTION_TRACE (EvAddressSpaceDispatch);
RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
if (!RegionObj2)
{
return_ACPI_STATUS (AE_NOT_EXIST);
}
/* Ensure that there is a handler associated with this region */
HandlerDesc = RegionObj->Region.Handler;
if (!HandlerDesc)
{
ACPI_ERROR ((AE_INFO,
"No handler for Region [%4.4s] (%p) [%s]",
AcpiUtGetNodeName (RegionObj->Region.Node),
RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
return_ACPI_STATUS (AE_NOT_EXIST);
}
Context = HandlerDesc->AddressSpace.Context;
/*
* It may be the case that the region has never been initialized.
* Some types of regions require special init code
*/
if (!(RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE))
{
/* This region has not been initialized yet, do it */
RegionSetup = HandlerDesc->AddressSpace.Setup;
if (!RegionSetup)
{
/* No initialization routine, exit with error */
ACPI_ERROR ((AE_INFO,
"No init routine for region(%p) [%s]",
RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
return_ACPI_STATUS (AE_NOT_EXIST);
}
/*
* We must exit the interpreter because the region setup will
* potentially execute control methods (for example, the _REG method
* for this region)
*/
AcpiExExitInterpreter ();
Status = RegionSetup (RegionObj, ACPI_REGION_ACTIVATE,
Context, &RegionContext);
/* Re-enter the interpreter */
AcpiExEnterInterpreter ();
/* Check for failure of the Region Setup */
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"During region initialization: [%s]",
AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
return_ACPI_STATUS (Status);
}
/* Region initialization may have been completed by RegionSetup */
if (!(RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE))
{
RegionObj->Region.Flags |= AOPOBJ_SETUP_COMPLETE;
/*
* Save the returned context for use in all accesses to
* the handler for this particular region
*/
if (!(RegionObj2->Extra.RegionContext))
{
RegionObj2->Extra.RegionContext = RegionContext;
}
//.........这里部分代码省略.........
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;
case ACPI_TYPE_METHOD:
/*
* If we are executing module level code, the original
* Node's object was replaced by this Method object and we
* saved the handler in the method object.
*
* See AcpiNsExecModuleCode
*/
if (!AcpiGbl_ParseTableAsTermList &&
ObjDesc->Method.InfoFlags & ACPI_METHOD_MODULE_LEVEL)
{
HandlerObj = ObjDesc->Method.Dispatch.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;
}
//.........这里部分代码省略.........
ACPI_STATUS
AcpiDsMethodError (
ACPI_STATUS Status,
ACPI_WALK_STATE *WalkState)
{
UINT32 AmlOffset;
ACPI_NAME Name = 0;
ACPI_FUNCTION_ENTRY ();
/* Ignore AE_OK and control exception codes */
if (ACPI_SUCCESS (Status) ||
(Status & AE_CODE_CONTROL))
{
return (Status);
}
/* Invoke the global exception handler */
if (AcpiGbl_ExceptionHandler)
{
/* Exit the interpreter, allow handler to execute methods */
AcpiExExitInterpreter ();
/*
* Handler can map the exception code to anything it wants, including
* AE_OK, in which case the executing method will not be aborted.
*/
AmlOffset = (UINT32) ACPI_PTR_DIFF (WalkState->Aml,
WalkState->ParserState.AmlStart);
if (WalkState->MethodNode)
{
Name = WalkState->MethodNode->Name.Integer;
}
else if (WalkState->DeferredNode)
{
Name = WalkState->DeferredNode->Name.Integer;
}
Status = AcpiGbl_ExceptionHandler (Status, Name,
WalkState->Opcode, AmlOffset, NULL);
AcpiExEnterInterpreter ();
}
AcpiDsClearImplicitReturn (WalkState);
if (ACPI_FAILURE (Status))
{
AcpiDsDumpMethodStack (Status, WalkState, WalkState->Op);
/* Display method locals/args if debugger is present */
#ifdef ACPI_DEBUGGER
AcpiDbDumpMethodInfo (Status, WalkState);
#endif
}
return (Status);
}
//.........这里部分代码省略.........
return_ACPI_STATUS (AE_NULL_OBJECT);
}
/* Count the number of arguments being passed to the method */
if (Info->Parameters)
{
while (Info->Parameters[Info->ParamCount])
{
if (Info->ParamCount > ACPI_METHOD_MAX_ARG)
{
return_ACPI_STATUS (AE_LIMIT);
}
Info->ParamCount++;
}
}
ACPI_DUMP_PATHNAME (Info->ResolvedNode, "ACPI: Execute Method",
ACPI_LV_INFO, _COMPONENT);
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Method at AML address %p Length %X\n",
Info->ObjDesc->Method.AmlStart + 1,
Info->ObjDesc->Method.AmlLength - 1));
/*
* Any namespace deletion must acquire both the namespace and
* interpreter locks to ensure that no thread is using the portion of
* the namespace that is being deleted.
*
* Execute the method via the interpreter. The interpreter is locked
* here before calling into the AML parser
*/
AcpiExEnterInterpreter ();
Status = AcpiPsExecuteMethod (Info);
AcpiExExitInterpreter ();
}
else
{
/*
* 2) Object is not a method, return its current value
*
* Disallow certain object types. For these, "evaluation" is undefined.
*/
switch (Info->ResolvedNode->Type)
{
case ACPI_TYPE_DEVICE:
case ACPI_TYPE_EVENT:
case ACPI_TYPE_MUTEX:
case ACPI_TYPE_REGION:
case ACPI_TYPE_THERMAL:
case ACPI_TYPE_LOCAL_SCOPE:
ACPI_ERROR ((AE_INFO,
"[%4.4s] Evaluation of object type [%s] is not supported",
Info->ResolvedNode->Name.Ascii,
AcpiUtGetTypeName (Info->ResolvedNode->Type)));
return_ACPI_STATUS (AE_TYPE);
default:
break;
}
/*
* Objects require additional resolution steps (e.g., the Node may be
ACPI_STATUS
AcpiEvAddressSpaceDispatch (
ACPI_OPERAND_OBJECT *RegionObj,
UINT32 Function,
ACPI_PHYSICAL_ADDRESS Address,
UINT32 BitWidth,
void *Value)
{
ACPI_STATUS Status;
ACPI_STATUS Status2;
ACPI_ADR_SPACE_HANDLER Handler;
ACPI_ADR_SPACE_SETUP RegionSetup;
ACPI_OPERAND_OBJECT *HandlerDesc;
ACPI_OPERAND_OBJECT *RegionObj2;
void *RegionContext = NULL;
ACPI_FUNCTION_TRACE ("EvAddressSpaceDispatch");
RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
if (!RegionObj2)
{
return_ACPI_STATUS (AE_NOT_EXIST);
}
/*
* Ensure that there is a handler associated with this region
*/
HandlerDesc = RegionObj->Region.AddrHandler;
if (!HandlerDesc)
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "no handler for region(%p) [%s]\n",
RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
return_ACPI_STATUS (AE_NOT_EXIST);
}
/*
* It may be the case that the region has never been initialized
* Some types of regions require special init code
*/
if (!(RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE))
{
/*
* This region has not been initialized yet, do it
*/
RegionSetup = HandlerDesc->AddrHandler.Setup;
if (!RegionSetup)
{
/*
* Bad news, no init routine and not init'd
*/
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No init routine for region(%p) [%s]\n",
RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
return_ACPI_STATUS (AE_UNKNOWN_STATUS);
}
/*
* We must exit the interpreter because the region setup will potentially
* execute control methods
*/
AcpiExExitInterpreter ();
Status = RegionSetup (RegionObj, ACPI_REGION_ACTIVATE,
HandlerDesc->AddrHandler.Context, &RegionContext);
/* Re-enter the interpreter */
Status2 = AcpiExEnterInterpreter ();
if (ACPI_FAILURE (Status2))
{
return_ACPI_STATUS (Status2);
}
/*
* Init routine may fail
*/
if (ACPI_FAILURE (Status))
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Region Init: %s [%s]\n",
AcpiFormatException (Status),
AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
return_ACPI_STATUS (Status);
}
RegionObj->Region.Flags |= AOPOBJ_SETUP_COMPLETE;
/*
* Save the returned context for use in all accesses to
* this particular region.
*/
RegionObj2->Extra.RegionContext = RegionContext;
}
/*
* We have everything we need, begin the process
*/
Handler = HandlerDesc->AddrHandler.Handler;
//.........这里部分代码省略.........
void
AcpiEvUpdateGpes (
ACPI_OWNER_ID TableOwnerId)
{
ACPI_GPE_XRUPT_INFO *GpeXruptInfo;
ACPI_GPE_BLOCK_INFO *GpeBlock;
ACPI_GPE_WALK_INFO WalkInfo;
ACPI_STATUS Status = AE_OK;
UINT32 NewWakeGpeCount = 0;
/* We will examine only _PRW/_Lxx/_Exx methods owned by this table */
WalkInfo.OwnerId = TableOwnerId;
WalkInfo.ExecuteByOwnerId = TRUE;
WalkInfo.Count = 0;
if (AcpiGbl_LeaveWakeGpesDisabled)
{
/*
* 1) Run any newly-loaded _PRW methods to find any GPEs that
* can now be marked as CAN_WAKE GPEs. Note: We must run the
* _PRW methods before we process the _Lxx/_Exx methods because
* we will enable all runtime GPEs associated with the new
* _Lxx/_Exx methods at the time we process those methods.
*
* Unlock interpreter so that we can run the _PRW methods.
*/
WalkInfo.GpeBlock = NULL;
WalkInfo.GpeDevice = NULL;
AcpiExExitInterpreter ();
Status = AcpiNsWalkNamespace (ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK,
AcpiEvMatchPrwAndGpe, NULL, &WalkInfo, NULL);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"While executing _PRW methods"));
}
AcpiExEnterInterpreter ();
NewWakeGpeCount = WalkInfo.Count;
}
/*
* 2) Find any _Lxx/_Exx GPE methods that have just been loaded.
*
* Any GPEs that correspond to new _Lxx/_Exx methods and are not
* marked as CAN_WAKE are immediately enabled.
*
* Examine the namespace underneath each GpeDevice within the
* GpeBlock lists.
*/
Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
if (ACPI_FAILURE (Status))
{
return;
}
WalkInfo.Count = 0;
WalkInfo.EnableThisGpe = TRUE;
/* Walk the interrupt level descriptor list */
GpeXruptInfo = AcpiGbl_GpeXruptListHead;
while (GpeXruptInfo)
{
/* Walk all Gpe Blocks attached to this interrupt level */
GpeBlock = GpeXruptInfo->GpeBlockListHead;
while (GpeBlock)
{
WalkInfo.GpeBlock = GpeBlock;
WalkInfo.GpeDevice = GpeBlock->Node;
Status = AcpiNsWalkNamespace (ACPI_TYPE_METHOD,
WalkInfo.GpeDevice, ACPI_UINT32_MAX,
ACPI_NS_WALK_NO_UNLOCK, AcpiEvMatchGpeMethod,
NULL, &WalkInfo, NULL);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"While decoding _Lxx/_Exx methods"));
}
GpeBlock = GpeBlock->Next;
}
GpeXruptInfo = GpeXruptInfo->Next;
}
if (WalkInfo.Count || NewWakeGpeCount)
{
ACPI_INFO ((AE_INFO,
"Enabled %u new runtime GPEs, added %u new wakeup GPEs",
WalkInfo.Count, NewWakeGpeCount));
}
//.........这里部分代码省略.........
//.........这里部分代码省略.........
Status = AcpiNsEvaluate (Info);
}
/*
* If we are expecting a return value, and all went well above,
* copy the return value to an external object.
*/
if (ReturnBuffer)
{
if (!Info->ReturnObject)
{
ReturnBuffer->Length = 0;
}
else
{
if (ACPI_GET_DESCRIPTOR_TYPE (Info->ReturnObject) ==
ACPI_DESC_TYPE_NAMED)
{
/*
* If we received a NS Node as a return object, this means that
* the object we are evaluating has nothing interesting to
* return (such as a mutex, etc.) We return an error because
* these types are essentially unsupported by this interface.
* We don't check up front because this makes it easier to add
* support for various types at a later date if necessary.
*/
Status = AE_TYPE;
Info->ReturnObject = NULL; /* No need to delete a NS Node */
ReturnBuffer->Length = 0;
}
if (ACPI_SUCCESS (Status))
{
/* Dereference Index and RefOf references */
AcpiNsResolveReferences (Info);
/* Get the size of the returned object */
Status = AcpiUtGetObjectSize (Info->ReturnObject,
&BufferSpaceNeeded);
if (ACPI_SUCCESS (Status))
{
/* Validate/Allocate/Clear caller buffer */
Status = AcpiUtInitializeBuffer (ReturnBuffer,
BufferSpaceNeeded);
if (ACPI_FAILURE (Status))
{
/*
* Caller's buffer is too small or a new one can't
* be allocated
*/
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Needed buffer size %X, %s\n",
(UINT32) BufferSpaceNeeded,
AcpiFormatException (Status)));
}
else
{
/* We have enough space for the object, build it */
Status = AcpiUtCopyIobjectToEobject (Info->ReturnObject,
ReturnBuffer);
}
}
}
}
}
if (Info->ReturnObject)
{
/*
* Delete the internal return object. NOTE: Interpreter must be
* locked to avoid race condition.
*/
AcpiExEnterInterpreter ();
/* Remove one reference on the return object (should delete it) */
AcpiUtRemoveReference (Info->ReturnObject);
AcpiExExitInterpreter ();
}
Cleanup:
/* Free the input parameter list (if we created one) */
if (Info->Parameters)
{
/* Free the allocated parameter block */
AcpiUtDeleteInternalObjectList (Info->Parameters);
}
ACPI_FREE (Info);
return_ACPI_STATUS (Status);
}
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