acpi_status
acpi_ex_do_logical_op (
	u16                             opcode,
	union acpi_operand_object       *operand0,
	union acpi_operand_object       *operand1,
	u8                              *logical_result)
{
	union acpi_operand_object       *local_operand1 = operand1;
	acpi_integer                    integer0;
	acpi_integer                    integer1;
	u32                             length0;
	u32                             length1;
	acpi_status                     status = AE_OK;
	u8                              local_result = FALSE;
	int                             compare;


	ACPI_FUNCTION_TRACE ("ex_do_logical_op");


	/*
	 * Convert the second operand if necessary.  The first operand
	 * determines the type of the second operand, (See the Data Types
	 * section of the ACPI 3.0+ specification.)  Both object types are
	 * guaranteed to be either Integer/String/Buffer by the operand
	 * resolution mechanism.
	 */
	switch (ACPI_GET_OBJECT_TYPE (operand0)) {
	case ACPI_TYPE_INTEGER:
		status = acpi_ex_convert_to_integer (operand1, &local_operand1, 16);
		break;

	case ACPI_TYPE_STRING:
		status = acpi_ex_convert_to_string (operand1, &local_operand1,
				 ACPI_IMPLICIT_CONVERT_HEX);
		break;

	case ACPI_TYPE_BUFFER:
		status = acpi_ex_convert_to_buffer (operand1, &local_operand1);
		break;

	default:
		status = AE_AML_INTERNAL;
		break;
	}

	if (ACPI_FAILURE (status)) {
		goto cleanup;
	}

	/*
	 * Two cases: 1) Both Integers, 2) Both Strings or Buffers
	 */
	if (ACPI_GET_OBJECT_TYPE (operand0) == ACPI_TYPE_INTEGER) {
		/*
		 * 1) Both operands are of type integer
		 *    Note: local_operand1 may have changed above
		 */
		integer0 = operand0->integer.value;
		integer1 = local_operand1->integer.value;

		switch (opcode) {
		case AML_LEQUAL_OP:             /* LEqual (Operand0, Operand1) */

			if (integer0 == integer1) {
				local_result = TRUE;
			}
			break;

		case AML_LGREATER_OP:           /* LGreater (Operand0, Operand1) */

			if (integer0 > integer1) {
				local_result = TRUE;
			}
			break;

		case AML_LLESS_OP:              /* LLess (Operand0, Operand1) */

			if (integer0 < integer1) {
				local_result = TRUE;
			}
			break;

		default:
			status = AE_AML_INTERNAL;
			break;
		}
	}
	else {
		/*
		 * 2) Both operands are Strings or both are Buffers
		 *    Note: Code below takes advantage of common Buffer/String
		 *          object fields. local_operand1 may have changed above. Use
		 *          memcmp to handle nulls in buffers.
		 */
		length0 = operand0->buffer.length;
		length1 = local_operand1->buffer.length;

		/* Lexicographic compare: compare the data bytes */

//.........这里部分代码省略.........

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_load_namespace
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in
 *              the RSDT/XSDT.
 *
 ******************************************************************************/
static acpi_status acpi_tb_load_namespace(void)
{
	acpi_status status;
	u32 i;
	struct acpi_table_header *new_dsdt;

	ACPI_FUNCTION_TRACE(tb_load_namespace);

	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);

	/*
	 * Load the namespace. The DSDT is required, but any SSDT and
	 * PSDT tables are optional. Verify the DSDT.
	 */
	if (!acpi_gbl_root_table_list.current_table_count ||
	    !ACPI_COMPARE_NAME(&
			       (acpi_gbl_root_table_list.
				tables[ACPI_TABLE_INDEX_DSDT].signature),
			       ACPI_SIG_DSDT)
	    ||
	    ACPI_FAILURE(acpi_tb_verify_table
			 (&acpi_gbl_root_table_list.
			  tables[ACPI_TABLE_INDEX_DSDT]))) {
		status = AE_NO_ACPI_TABLES;
		goto unlock_and_exit;
	}

	/*
	 * Save the DSDT pointer for simple access. This is the mapped memory
	 * address. We must take care here because the address of the .Tables
	 * array can change dynamically as tables are loaded at run-time. Note:
	 * .Pointer field is not validated until after call to acpi_tb_verify_table.
	 */
	acpi_gbl_DSDT =
	    acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].pointer;

	/*
	 * Optionally copy the entire DSDT to local memory (instead of simply
	 * mapping it.) There are some BIOSs that corrupt or replace the original
	 * DSDT, creating the need for this option. Default is FALSE, do not copy
	 * the DSDT.
	 */
	if (acpi_gbl_copy_dsdt_locally) {
		new_dsdt = acpi_tb_copy_dsdt(ACPI_TABLE_INDEX_DSDT);
		if (new_dsdt) {
			acpi_gbl_DSDT = new_dsdt;
		}
	}

	/*
	 * Save the original DSDT header for detection of table corruption
	 * and/or replacement of the DSDT from outside the OS.
	 */
	ACPI_MEMCPY(&acpi_gbl_original_dsdt_header, acpi_gbl_DSDT,
		    sizeof(struct acpi_table_header));

	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);

	/* Load and parse tables */

	status = acpi_ns_load_table(ACPI_TABLE_INDEX_DSDT, acpi_gbl_root_node);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */

	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
	for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
		if ((!ACPI_COMPARE_NAME
		     (&(acpi_gbl_root_table_list.tables[i].signature),
		      ACPI_SIG_SSDT)
		     &&
		     !ACPI_COMPARE_NAME(&
					(acpi_gbl_root_table_list.tables[i].
					 signature), ACPI_SIG_PSDT))
		    ||
		    ACPI_FAILURE(acpi_tb_verify_table
				 (&acpi_gbl_root_table_list.tables[i]))) {
			continue;
		}

		if (no_auto_ssdt) {
#ifdef CONFIG_DEBUG_PRINTK
			printk(KERN_WARNING "ACPI: SSDT ignored due to \"acpi_no_auto_ssdt\"\n");
#else
			;
#endif
//.........这里部分代码省略.........

ACPI_STATUS
AcpiDsScopeStackPush (
    ACPI_NAMESPACE_NODE     *Node,
    ACPI_OBJECT_TYPE        Type,
    ACPI_WALK_STATE         *WalkState)
{
    ACPI_GENERIC_STATE      *ScopeInfo;
    ACPI_GENERIC_STATE      *OldScopeInfo;


    ACPI_FUNCTION_TRACE (DsScopeStackPush);


    if (!Node)
    {
        /* Invalid scope   */

        ACPI_ERROR ((AE_INFO, "Null scope parameter"));
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }

    /* Make sure object type is valid */

    if (!AcpiUtValidObjectType (Type))
    {
        ACPI_WARNING ((AE_INFO,
            "Invalid object type: 0x%X", Type));
    }

    /* Allocate a new scope object */

    ScopeInfo = AcpiUtCreateGenericState ();
    if (!ScopeInfo)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    /* Init new scope object */

    ScopeInfo->Common.DescriptorType = ACPI_DESC_TYPE_STATE_WSCOPE;
    ScopeInfo->Scope.Node = Node;
    ScopeInfo->Common.Value = (UINT16) Type;

    WalkState->ScopeDepth++;

    ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
        "[%.2d] Pushed scope ", (UINT32) WalkState->ScopeDepth));

    OldScopeInfo = WalkState->ScopeInfo;
    if (OldScopeInfo)
    {
        ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC,
            "[%4.4s] (%s)",
            AcpiUtGetNodeName (OldScopeInfo->Scope.Node),
            AcpiUtGetTypeName (OldScopeInfo->Common.Value)));
    }
    else
    {
        ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC,
            "[\\___] (%s)", "ROOT"));
    }

    ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC,
        ", New scope -> [%4.4s] (%s)\n",
        AcpiUtGetNodeName (ScopeInfo->Scope.Node),
        AcpiUtGetTypeName (ScopeInfo->Common.Value)));

    /* Push new scope object onto stack */

    AcpiUtPushGenericState (&WalkState->ScopeInfo, ScopeInfo);
    return_ACPI_STATUS (AE_OK);
}

ACPI_STATUS
AcpiPsExecuteMethod (
    ACPI_EVALUATE_INFO      *Info)
{
    ACPI_STATUS             Status;
    ACPI_PARSE_OBJECT       *Op;
    ACPI_WALK_STATE         *WalkState;


    ACPI_FUNCTION_TRACE (PsExecuteMethod);


    /* Quick validation of DSDT header */

    AcpiTbCheckDsdtHeader ();

    /* Validate the Info and method Node */

    if (!Info || !Info->ResolvedNode)
    {
        return_ACPI_STATUS (AE_NULL_ENTRY);
    }

    /* Init for new method, wait on concurrency semaphore */

    Status = AcpiDsBeginMethodExecution (Info->ResolvedNode, Info->ObjDesc, NULL);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /*
     * The caller "owns" the parameters, so give each one an extra reference
     */
    AcpiPsUpdateParameterList (Info, REF_INCREMENT);

    /* Begin tracing if requested */

    AcpiPsStartTrace (Info);

    /*
     * Execute the method. Performs parse simultaneously
     */
    ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
        "**** Begin Method Parse/Execute [%4.4s] **** Node=%p Obj=%p\n",
        Info->ResolvedNode->Name.Ascii, Info->ResolvedNode, Info->ObjDesc));

    /* Create and init a Root Node */

    Op = AcpiPsCreateScopeOp ();
    if (!Op)
    {
        Status = AE_NO_MEMORY;
        goto Cleanup;
    }

    /* Create and initialize a new walk state */

    Info->PassNumber = ACPI_IMODE_EXECUTE;
    WalkState = AcpiDsCreateWalkState (
                    Info->ObjDesc->Method.OwnerId, NULL, NULL, NULL);
    if (!WalkState)
    {
        Status = AE_NO_MEMORY;
        goto Cleanup;
    }

    Status = AcpiDsInitAmlWalk (WalkState, Op, Info->ResolvedNode,
                Info->ObjDesc->Method.AmlStart,
                Info->ObjDesc->Method.AmlLength, Info, Info->PassNumber);
    if (ACPI_FAILURE (Status))
    {
        AcpiDsDeleteWalkState (WalkState);
        goto Cleanup;
    }

    if (Info->ObjDesc->Method.InfoFlags & ACPI_METHOD_MODULE_LEVEL)
    {
        WalkState->ParseFlags |= ACPI_PARSE_MODULE_LEVEL;
    }

    /* Invoke an internal method if necessary */

    if (Info->ObjDesc->Method.InfoFlags & ACPI_METHOD_INTERNAL_ONLY)
    {
        Status = Info->ObjDesc->Method.Dispatch.Implementation (WalkState);
        Info->ReturnObject = WalkState->ReturnDesc;

        /* Cleanup states */

        AcpiDsScopeStackClear (WalkState);
        AcpiPsCleanupScope (&WalkState->ParserState);
        AcpiDsTerminateControlMethod (WalkState->MethodDesc, WalkState);
        AcpiDsDeleteWalkState (WalkState);
        goto Cleanup;
    }

    /*
     * Start method evaluation with an implicit return of zero. This is done
     * for Windows compatibility.
//.........这里部分代码省略.........

acpi_status
acpi_ex_release_mutex(union acpi_operand_object *obj_desc,
                      struct acpi_walk_state *walk_state)
{
    acpi_status status = AE_OK;
    u8 previous_sync_level;
    struct acpi_thread_state *owner_thread;

    ACPI_FUNCTION_TRACE(ex_release_mutex);

    if (!obj_desc) {
        return_ACPI_STATUS(AE_BAD_PARAMETER);
    }

    owner_thread = obj_desc->mutex.owner_thread;

    /* The mutex must have been previously acquired in order to release it */

    if (!owner_thread) {
        ACPI_ERROR((AE_INFO,
                    "Cannot release Mutex [%4.4s], not acquired",
                    acpi_ut_get_node_name(obj_desc->mutex.node)));
        return_ACPI_STATUS(AE_AML_MUTEX_NOT_ACQUIRED);
    }

    /* Must have a valid thread ID */

    if (!walk_state->thread) {
        ACPI_ERROR((AE_INFO,
                    "Cannot release Mutex [%4.4s], null thread info",
                    acpi_ut_get_node_name(obj_desc->mutex.node)));
        return_ACPI_STATUS(AE_AML_INTERNAL);
    }

    /*
     * The Mutex is owned, but this thread must be the owner.
     * Special case for Global Lock, any thread can release
     */
    if ((owner_thread->thread_id != walk_state->thread->thread_id) &&
            (obj_desc != acpi_gbl_global_lock_mutex)) {
        ACPI_ERROR((AE_INFO,
                    "Thread %u cannot release Mutex [%4.4s] acquired by thread %u",
                    (u32)walk_state->thread->thread_id,
                    acpi_ut_get_node_name(obj_desc->mutex.node),
                    (u32)owner_thread->thread_id));
        return_ACPI_STATUS(AE_AML_NOT_OWNER);
    }

    /*
     * The sync level of the mutex must be equal to the current sync level. In
     * other words, the current level means that at least one mutex at that
     * level is currently being held. Attempting to release a mutex of a
     * different level can only mean that the mutex ordering rule is being
     * violated. This behavior is clarified in ACPI 4.0 specification.
     */
    if (obj_desc->mutex.sync_level != owner_thread->current_sync_level) {
        ACPI_ERROR((AE_INFO,
                    "Cannot release Mutex [%4.4s], SyncLevel mismatch: mutex %u current %u",
                    acpi_ut_get_node_name(obj_desc->mutex.node),
                    obj_desc->mutex.sync_level,
                    walk_state->thread->current_sync_level));
        return_ACPI_STATUS(AE_AML_MUTEX_ORDER);
    }

    /*
     * Get the previous sync_level from the head of the acquired mutex list.
     * This handles the case where several mutexes at the same level have been
     * acquired, but are not released in reverse order.
     */
    previous_sync_level =
        owner_thread->acquired_mutex_list->mutex.original_sync_level;

    status = acpi_ex_release_mutex_object(obj_desc);
    if (ACPI_FAILURE(status)) {
        return_ACPI_STATUS(status);
    }

    if (obj_desc->mutex.acquisition_depth == 0) {

        /* Restore the previous sync_level */

        owner_thread->current_sync_level = previous_sync_level;
    }

    return_ACPI_STATUS(status);
}

ACPI_STATUS
AcpiNsLookup (
    ACPI_GENERIC_STATE      *ScopeInfo,
    char                    *Pathname,
    ACPI_OBJECT_TYPE        Type,
    ACPI_INTERPRETER_MODE   InterpreterMode,
    UINT32                  Flags,
    ACPI_WALK_STATE         *WalkState,
    ACPI_NAMESPACE_NODE     **ReturnNode)
{
    ACPI_STATUS             Status;
    char                    *Path = Pathname;
    ACPI_NAMESPACE_NODE     *PrefixNode;
    ACPI_NAMESPACE_NODE     *CurrentNode = NULL;
    ACPI_NAMESPACE_NODE     *ThisNode = NULL;
    UINT32                  NumSegments;
    UINT32                  NumCarats;
    ACPI_NAME               SimpleName;
    ACPI_OBJECT_TYPE        TypeToCheckFor;
    ACPI_OBJECT_TYPE        ThisSearchType;
    UINT32                  SearchParentFlag = ACPI_NS_SEARCH_PARENT;
    UINT32                  LocalFlags;


    ACPI_FUNCTION_TRACE (NsLookup);


    if (!ReturnNode)
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }

    LocalFlags = Flags &
        ~(ACPI_NS_ERROR_IF_FOUND | ACPI_NS_OVERRIDE_IF_FOUND |
          ACPI_NS_SEARCH_PARENT);
    *ReturnNode = ACPI_ENTRY_NOT_FOUND;
    AcpiGbl_NsLookupCount++;

    if (!AcpiGbl_RootNode)
    {
        return_ACPI_STATUS (AE_NO_NAMESPACE);
    }

    /* Get the prefix scope. A null scope means use the root scope */

    if ((!ScopeInfo) ||
        (!ScopeInfo->Scope.Node))
    {
        ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
            "Null scope prefix, using root node (%p)\n",
            AcpiGbl_RootNode));

        PrefixNode = AcpiGbl_RootNode;
    }
    else
    {
        PrefixNode = ScopeInfo->Scope.Node;
        if (ACPI_GET_DESCRIPTOR_TYPE (PrefixNode) != ACPI_DESC_TYPE_NAMED)
        {
            ACPI_ERROR ((AE_INFO, "%p is not a namespace node [%s]",
                PrefixNode, AcpiUtGetDescriptorName (PrefixNode)));
            return_ACPI_STATUS (AE_AML_INTERNAL);
        }

        if (!(Flags & ACPI_NS_PREFIX_IS_SCOPE))
        {
            /*
             * This node might not be a actual "scope" node (such as a
             * Device/Method, etc.)  It could be a Package or other object
             * node. Backup up the tree to find the containing scope node.
             */
            while (!AcpiNsOpensScope (PrefixNode->Type) &&
                    PrefixNode->Type != ACPI_TYPE_ANY)
            {
                PrefixNode = PrefixNode->Parent;
            }
        }
    }

    /* Save type. TBD: may be no longer necessary */

    TypeToCheckFor = Type;

    /*
     * Begin examination of the actual pathname
     */
    if (!Pathname)
    {
        /* A Null NamePath is allowed and refers to the root */

        NumSegments = 0;
        ThisNode = AcpiGbl_RootNode;
        Path = "";

        ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
            "Null Pathname (Zero segments), Flags=%X\n", Flags));
    }
    else
    {
        /*
//.........这里部分代码省略.........

ACPI_STATUS
AcpiDsStoreObjectToLocal (
    UINT8                   Type,
    UINT32                  Index,
    ACPI_OPERAND_OBJECT     *ObjDesc,
    ACPI_WALK_STATE         *WalkState)
{
    ACPI_STATUS             Status;
    ACPI_NAMESPACE_NODE     *Node;
    ACPI_OPERAND_OBJECT     *CurrentObjDesc;
    ACPI_OPERAND_OBJECT     *NewObjDesc;


    ACPI_FUNCTION_TRACE (DsStoreObjectToLocal);
    ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Type=%2.2X Index=%u Obj=%p\n",
        Type, Index, ObjDesc));

    /* Parameter validation */

    if (!ObjDesc)
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }

    /* Get the namespace node for the arg/local */

    Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    CurrentObjDesc = AcpiNsGetAttachedObject (Node);
    if (CurrentObjDesc == ObjDesc)
    {
        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p already installed!\n",
            ObjDesc));
        return_ACPI_STATUS (Status);
    }

    /*
     * If the reference count on the object is more than one, we must
     * take a copy of the object before we store. A reference count
     * of exactly 1 means that the object was just created during the
     * evaluation of an expression, and we can safely use it since it
     * is not used anywhere else.
     */
    NewObjDesc = ObjDesc;
    if (ObjDesc->Common.ReferenceCount > 1)
    {
        Status = AcpiUtCopyIobjectToIobject (
            ObjDesc, &NewObjDesc, WalkState);
        if (ACPI_FAILURE (Status))
        {
            return_ACPI_STATUS (Status);
        }
    }

    /*
     * If there is an object already in this slot, we either
     * have to delete it, or if this is an argument and there
     * is an object reference stored there, we have to do
     * an indirect store!
     */
    if (CurrentObjDesc)
    {
        /*
         * Check for an indirect store if an argument
         * contains an object reference (stored as an Node).
         * We don't allow this automatic dereferencing for
         * locals, since a store to a local should overwrite
         * anything there, including an object reference.
         *
         * If both Arg0 and Local0 contain RefOf (Local4):
         *
         * Store (1, Arg0)             - Causes indirect store to local4
         * Store (1, Local0)           - Stores 1 in local0, overwriting
         *                                  the reference to local4
         * Store (1, DeRefof (Local0)) - Causes indirect store to local4
         *
         * Weird, but true.
         */
        if (Type == ACPI_REFCLASS_ARG)
        {
            /*
             * If we have a valid reference object that came from RefOf(),
             * do the indirect store
             */
            if ((ACPI_GET_DESCRIPTOR_TYPE (CurrentObjDesc) ==
                    ACPI_DESC_TYPE_OPERAND) &&
                (CurrentObjDesc->Common.Type ==
                    ACPI_TYPE_LOCAL_REFERENCE) &&
                (CurrentObjDesc->Reference.Class ==
                    ACPI_REFCLASS_REFOF))
            {
                ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
                    "Arg (%p) is an ObjRef(Node), storing in node %p\n",
                    NewObjDesc, CurrentObjDesc));

                /*
//.........这里部分代码省略.........

ACPI_STATUS
AcpiEvPciConfigRegionSetup (
    ACPI_HANDLE             Handle,
    UINT32                  Function,
    void                    *HandlerContext,
    void                    **RegionContext)
{
    ACPI_STATUS             Status = AE_OK;
    ACPI_INTEGER            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 = AcpiNsGetParentNode (RegionObj->Region.Node);

    /*
     * 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.
                         */
                        Status = AE_OK;
                    }
                    else
                    {
                        ACPI_EXCEPTION ((AE_INFO, Status,
                            "Could not install PciConfig handler for Root Bridge %4.4s",
                            AcpiUtGetNodeName (PciRootNode)));
                    }
                }
                break;
            }

            PciRootNode = AcpiNsGetParentNode (PciRootNode);
        }

        /* PCI root bridge not found, use namespace root node */
    }
//.........这里部分代码省略.........

ACPI_STATUS
AcpiDsMethodDataGetValue (
    UINT8                   Type,
    UINT32                  Index,
    ACPI_WALK_STATE         *WalkState,
    ACPI_OPERAND_OBJECT     **DestDesc)
{
    ACPI_STATUS             Status;
    ACPI_NAMESPACE_NODE     *Node;
    ACPI_OPERAND_OBJECT     *Object;


    ACPI_FUNCTION_TRACE (DsMethodDataGetValue);


    /* Validate the object descriptor */

    if (!DestDesc)
    {
        ACPI_ERROR ((AE_INFO, "Null object descriptor pointer"));
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }

    /* Get the namespace node for the arg/local */

    Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Get the object from the node */

    Object = Node->Object;

    /* Examine the returned object, it must be valid. */

    if (!Object)
    {
        /*
         * Index points to uninitialized object.
         * This means that either 1) The expected argument was
         * not passed to the method, or 2) A local variable
         * was referenced by the method (via the ASL)
         * before it was initialized. Either case is an error.
         */

        /* If slack enabled, init the LocalX/ArgX to an Integer of value zero */

        if (AcpiGbl_EnableInterpreterSlack)
        {
            Object = AcpiUtCreateIntegerObject ((UINT64) 0);
            if (!Object)
            {
                return_ACPI_STATUS (AE_NO_MEMORY);
            }

            Node->Object = Object;
        }

        /* Otherwise, return the error */

        else switch (Type)
        {
        case ACPI_REFCLASS_ARG:

            ACPI_ERROR ((AE_INFO,
                "Uninitialized Arg[%u] at node %p",
                Index, Node));

            return_ACPI_STATUS (AE_AML_UNINITIALIZED_ARG);

        case ACPI_REFCLASS_LOCAL:
            /*
             * No error message for this case, will be trapped again later to
             * detect and ignore cases of Store(LocalX,LocalX)
             */
            return_ACPI_STATUS (AE_AML_UNINITIALIZED_LOCAL);

        default:

            ACPI_ERROR ((AE_INFO, "Not a Arg/Local opcode: 0x%X", Type));
            return_ACPI_STATUS (AE_AML_INTERNAL);
        }
    }

    /*
     * The Index points to an initialized and valid object.
     * Return an additional reference to the object
     */
    *DestDesc = Object;
    AcpiUtAddReference (Object);

    return_ACPI_STATUS (AE_OK);
}

u32
acpi_ev_gpe_dispatch(struct acpi_gpe_event_info *gpe_event_info, u32 gpe_number)
{
	acpi_status status;

	ACPI_FUNCTION_TRACE(ev_gpe_dispatch);

	acpi_os_gpe_count(gpe_number);

	/*
	 * If edge-triggered, clear the GPE status bit now. Note that
	 * level-triggered events are cleared after the GPE is serviced.
	 */
	if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
	    ACPI_GPE_EDGE_TRIGGERED) {
		status = acpi_hw_clear_gpe(gpe_event_info);
		if (ACPI_FAILURE(status)) {
			ACPI_EXCEPTION((AE_INFO, status,
					"Unable to clear GPE[%2X]",
					gpe_number));
			return_UINT32(ACPI_INTERRUPT_NOT_HANDLED);
		}
	}

	/*
	 * Dispatch the GPE to either an installed handler, or the control method
	 * associated with this GPE (_Lxx or _Exx). If a handler exists, we invoke
	 * it and do not attempt to run the method. If there is neither a handler
	 * nor a method, we disable this GPE to prevent further such pointless
	 * events from firing.
	 */
	switch (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) {
	case ACPI_GPE_DISPATCH_HANDLER:

		/*
		 * Invoke the installed handler (at interrupt level)
		 * Ignore return status for now.
		 * TBD: leave GPE disabled on error?
		 */
		(void)gpe_event_info->dispatch.handler->address(gpe_event_info->
								dispatch.
								handler->
								context);

		/* It is now safe to clear level-triggered events. */

		if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
		    ACPI_GPE_LEVEL_TRIGGERED) {
			status = acpi_hw_clear_gpe(gpe_event_info);
			if (ACPI_FAILURE(status)) {
				ACPI_EXCEPTION((AE_INFO, status,
						"Unable to clear GPE[%2X]",
						gpe_number));
				return_UINT32(ACPI_INTERRUPT_NOT_HANDLED);
			}
		}
		break;

	case ACPI_GPE_DISPATCH_METHOD:

		/*
		 * Disable the GPE, so it doesn't keep firing before the method has a
		 * chance to run (it runs asynchronously with interrupts enabled).
		 */
		status = acpi_ev_disable_gpe(gpe_event_info);
		if (ACPI_FAILURE(status)) {
			ACPI_EXCEPTION((AE_INFO, status,
					"Unable to disable GPE[%2X]",
					gpe_number));
			return_UINT32(ACPI_INTERRUPT_NOT_HANDLED);
		}

		/*
		 * Execute the method associated with the GPE
		 * NOTE: Level-triggered GPEs are cleared after the method completes.
		 */
		status = acpi_os_execute(OSL_GPE_HANDLER,
					 acpi_ev_asynch_execute_gpe_method,
					 gpe_event_info);
		if (ACPI_FAILURE(status)) {
			ACPI_EXCEPTION((AE_INFO, status,
					"Unable to queue handler for GPE[%2X] - event disabled",
					gpe_number));
		}
		break;

	default:

		/* No handler or method to run! */

		ACPI_ERROR((AE_INFO,
			    "No handler or method for GPE[%2X], disabling event",
			    gpe_number));

		/*
		 * Disable the GPE. The GPE will remain disabled until the ACPICA
		 * Core Subsystem is restarted, or a handler is installed.
		 */
		status = acpi_ev_disable_gpe(gpe_event_info);
		if (ACPI_FAILURE(status)) {
//.........这里部分代码省略.........

static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
{
	struct acpi_gpe_event_info *gpe_event_info = (void *)context;
	acpi_status status;
	struct acpi_gpe_event_info local_gpe_event_info;
	struct acpi_evaluate_info *info;

	ACPI_FUNCTION_TRACE(ev_asynch_execute_gpe_method);

	status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
	if (ACPI_FAILURE(status)) {
		return_VOID;
	}

	/* Must revalidate the gpe_number/gpe_block */

	if (!acpi_ev_valid_gpe_event(gpe_event_info)) {
		status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
		return_VOID;
	}

	/* Set the GPE flags for return to enabled state */

	(void)acpi_ev_enable_gpe(gpe_event_info, FALSE);

	/*
	 * Take a snapshot of the GPE info for this level - we copy the info to
	 * prevent a race condition with remove_handler/remove_block.
	 */
	ACPI_MEMCPY(&local_gpe_event_info, gpe_event_info,
		    sizeof(struct acpi_gpe_event_info));

	status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
	if (ACPI_FAILURE(status)) {
		return_VOID;
	}

	/*
	 * Must check for control method type dispatch one more time to avoid a
	 * race with ev_gpe_install_handler
	 */
	if ((local_gpe_event_info.flags & ACPI_GPE_DISPATCH_MASK) ==
	    ACPI_GPE_DISPATCH_METHOD) {

		/* Allocate the evaluation information block */

		info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
		if (!info) {
			status = AE_NO_MEMORY;
		} else {
			/*
			 * Invoke the GPE Method (_Lxx, _Exx) i.e., evaluate the _Lxx/_Exx
			 * control method that corresponds to this GPE
			 */
			info->prefix_node =
			    local_gpe_event_info.dispatch.method_node;
			info->flags = ACPI_IGNORE_RETURN_VALUE;

			status = acpi_ns_evaluate(info);
			ACPI_FREE(info);
		}

		if (ACPI_FAILURE(status)) {
			ACPI_EXCEPTION((AE_INFO, status,
					"while evaluating GPE method [%4.4s]",
					acpi_ut_get_node_name
					(local_gpe_event_info.dispatch.
					 method_node)));
		}
	}
	/* Defer enabling of GPE until all notify handlers are done */
	acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_ev_asynch_enable_gpe,
				gpe_event_info);
	return_VOID;
}

acpi_status
acpi_ns_search_node (
	u32                             target_name,
	struct acpi_namespace_node      *node,
	acpi_object_type                type,
	struct acpi_namespace_node      **return_node)
{
	struct acpi_namespace_node      *next_node;


	ACPI_FUNCTION_TRACE ("ns_search_node");


#ifdef ACPI_DEBUG_OUTPUT
	if (ACPI_LV_NAMES & acpi_dbg_level) {
		char                        *scope_name;

		scope_name = acpi_ns_get_external_pathname (node);
		if (scope_name) {
			ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
				"Searching %s (%p) For [%4.4s] (%s)\n",
				scope_name, node, (char *) &target_name,
				acpi_ut_get_type_name (type)));

			ACPI_MEM_FREE (scope_name);
		}
	}
#endif

	/*
	 * Search for name at this namespace level, which is to say that we
	 * must search for the name among the children of this object
	 */
	next_node = node->child;
	while (next_node) {
		/* Check for match against the name */

		if (next_node->name.integer == target_name) {
			/* Resolve a control method alias if any */

			if (acpi_ns_get_type (next_node) == ACPI_TYPE_LOCAL_METHOD_ALIAS) {
				next_node = ACPI_CAST_PTR (struct acpi_namespace_node, next_node->object);
			}

			/*
			 * Found matching entry.
			 */
			ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
				"Name [%4.4s] (%s) %p found in scope [%4.4s] %p\n",
				(char *) &target_name, acpi_ut_get_type_name (next_node->type),
				next_node, acpi_ut_get_node_name (node), node));

			*return_node = next_node;
			return_ACPI_STATUS (AE_OK);
		}

		/*
		 * The last entry in the list points back to the parent,
		 * so a flag is used to indicate the end-of-list
		 */
		if (next_node->flags & ANOBJ_END_OF_PEER_LIST) {
			/* Searched entire list, we are done */

			break;
		}

		/* Didn't match name, move on to the next peer object */

		next_node = next_node->peer;
	}

ACPI_STATUS
AcpiEvMatchGpeMethod (
    ACPI_HANDLE             ObjHandle,
    UINT32                  Level,
    void                    *Context,
    void                    **ReturnValue)
{
    ACPI_NAMESPACE_NODE     *MethodNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
    ACPI_GPE_WALK_INFO      *WalkInfo = ACPI_CAST_PTR (ACPI_GPE_WALK_INFO, Context);
    ACPI_GPE_EVENT_INFO     *GpeEventInfo;
    UINT32                  GpeNumber;
    char                    Name[ACPI_NAME_SIZE + 1];
    UINT8                   Type;


    ACPI_FUNCTION_TRACE (EvMatchGpeMethod);


    /* Check if requested OwnerId matches this OwnerId */

    if ((WalkInfo->ExecuteByOwnerId) &&
        (MethodNode->OwnerId != WalkInfo->OwnerId))
    {
        return_ACPI_STATUS (AE_OK);
    }

    /*
     * Match and decode the _Lxx and _Exx GPE method names
     *
     * 1) Extract the method name and null terminate it
     */
    ACPI_MOVE_32_TO_32 (Name, &MethodNode->Name.Integer);
    Name[ACPI_NAME_SIZE] = 0;

    /* 2) Name must begin with an underscore */

    if (Name[0] != '_')
    {
        return_ACPI_STATUS (AE_OK); /* Ignore this method */
    }

    /*
     * 3) Edge/Level determination is based on the 2nd character
     *    of the method name
     */
    switch (Name[1])
    {
    case 'L':

        Type = ACPI_GPE_LEVEL_TRIGGERED;
        break;

    case 'E':

        Type = ACPI_GPE_EDGE_TRIGGERED;
        break;

    default:

        /* Unknown method type, just ignore it */

        ACPI_DEBUG_PRINT ((ACPI_DB_LOAD,
            "Ignoring unknown GPE method type: %s "
            "(name not of form _Lxx or _Exx)", Name));
        return_ACPI_STATUS (AE_OK);
    }

    /* 4) The last two characters of the name are the hex GPE Number */

    GpeNumber = strtoul (&Name[2], NULL, 16);
    if (GpeNumber == ACPI_UINT32_MAX)
    {
        /* Conversion failed; invalid method, just ignore it */

        ACPI_DEBUG_PRINT ((ACPI_DB_LOAD,
            "Could not extract GPE number from name: %s "
            "(name is not of form _Lxx or _Exx)", Name));
        return_ACPI_STATUS (AE_OK);
    }

    /* Ensure that we have a valid GPE number for this GPE block */

    GpeEventInfo = AcpiEvLowGetGpeInfo (GpeNumber, WalkInfo->GpeBlock);
    if (!GpeEventInfo)
    {
        /*
         * This GpeNumber is not valid for this GPE block, just ignore it.
         * However, it may be valid for a different GPE block, since GPE0
         * and GPE1 methods both appear under \_GPE.
         */
        return_ACPI_STATUS (AE_OK);
    }

    if ((ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
            ACPI_GPE_DISPATCH_HANDLER) ||
        (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
            ACPI_GPE_DISPATCH_RAW_HANDLER))
    {
        /* If there is already a handler, ignore this GPE method */

//.........这里部分代码省略.........

ACPI_STATUS
AcpiEvGpeInitialize (
    void)
{
    UINT32                  RegisterCount0 = 0;
    UINT32                  RegisterCount1 = 0;
    UINT32                  GpeNumberMax = 0;
    ACPI_STATUS             Status;


    ACPI_FUNCTION_TRACE (EvGpeInitialize);


    ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
        "Initializing General Purpose Events (GPEs):\n"));

    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /*
     * Initialize the GPE Block(s) defined in the FADT
     *
     * Why the GPE register block lengths are divided by 2:  From the ACPI
     * Spec, section "General-Purpose Event Registers", we have:
     *
     * "Each register block contains two registers of equal length
     *  GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the
     *  GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN
     *  The length of the GPE1_STS and GPE1_EN registers is equal to
     *  half the GPE1_LEN. If a generic register block is not supported
     *  then its respective block pointer and block length values in the
     *  FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need
     *  to be the same size."
     */

    /*
     * Determine the maximum GPE number for this machine.
     *
     * Note: both GPE0 and GPE1 are optional, and either can exist without
     * the other.
     *
     * If EITHER the register length OR the block address are zero, then that
     * particular block is not supported.
     */
    if (AcpiGbl_FADT.Gpe0BlockLength &&
        AcpiGbl_FADT.XGpe0Block.Address)
    {
        /* GPE block 0 exists (has both length and address > 0) */

        RegisterCount0 = (UINT16) (AcpiGbl_FADT.Gpe0BlockLength / 2);
        GpeNumberMax = (RegisterCount0 * ACPI_GPE_REGISTER_WIDTH) - 1;

        /* Install GPE Block 0 */

        Status = AcpiEvCreateGpeBlock (AcpiGbl_FadtGpeDevice,
                    AcpiGbl_FADT.XGpe0Block.Address,
                    AcpiGbl_FADT.XGpe0Block.SpaceId,
                    RegisterCount0, 0,
                    AcpiGbl_FADT.SciInterrupt, &AcpiGbl_GpeFadtBlocks[0]);

        if (ACPI_FAILURE (Status))
        {
            ACPI_EXCEPTION ((AE_INFO, Status,
                "Could not create GPE Block 0"));
        }
    }

    if (AcpiGbl_FADT.Gpe1BlockLength &&
        AcpiGbl_FADT.XGpe1Block.Address)
    {
        /* GPE block 1 exists (has both length and address > 0) */

        RegisterCount1 = (UINT16) (AcpiGbl_FADT.Gpe1BlockLength / 2);

        /* Check for GPE0/GPE1 overlap (if both banks exist) */

        if ((RegisterCount0) &&
            (GpeNumberMax >= AcpiGbl_FADT.Gpe1Base))
        {
            ACPI_ERROR ((AE_INFO,
                "GPE0 block (GPE 0 to %u) overlaps the GPE1 block "
                "(GPE %u to %u) - Ignoring GPE1",
                GpeNumberMax, AcpiGbl_FADT.Gpe1Base,
                AcpiGbl_FADT.Gpe1Base +
                ((RegisterCount1 * ACPI_GPE_REGISTER_WIDTH) - 1)));

            /* Ignore GPE1 block by setting the register count to zero */

            RegisterCount1 = 0;
        }
        else
        {
            /* Install GPE Block 1 */

            Status = AcpiEvCreateGpeBlock (AcpiGbl_FadtGpeDevice,
                        AcpiGbl_FADT.XGpe1Block.Address,
                        AcpiGbl_FADT.XGpe1Block.SpaceId,
//.........这里部分代码省略.........

ACPI_STATUS
AcpiTbInstallAndLoadTable (
    ACPI_TABLE_HEADER       *Table,
    ACPI_PHYSICAL_ADDRESS   Address,
    UINT8                   Flags,
    BOOLEAN                 Override,
    UINT32                  *TableIndex)
{
    ACPI_STATUS             Status;
    UINT32                  i;
    ACPI_OWNER_ID           OwnerId;


    ACPI_FUNCTION_TRACE (AcpiLoadTable);


    (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);

    /* Install the table and load it into the namespace */

    Status = AcpiTbInstallStandardTable (Address, Flags, TRUE,
        Override, &i);
    if (ACPI_FAILURE (Status))
    {
        goto UnlockAndExit;
    }

    /*
     * Note: Now table is "INSTALLED", it must be validated before
     * using.
     */
    Status = AcpiTbValidateTable (&AcpiGbl_RootTableList.Tables[i]);
    if (ACPI_FAILURE (Status))
    {
        goto UnlockAndExit;
    }

    (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
    Status = AcpiNsLoadTable (i, AcpiGbl_RootNode);

    /* Execute any module-level code that was found in the table */

    if (!AcpiGbl_ParseTableAsTermList && AcpiGbl_GroupModuleLevelCode)
    {
        AcpiNsExecModuleCodeList ();
    }

    /*
     * Update GPEs for any new _Lxx/_Exx methods. Ignore errors. The host is
     * responsible for discovering any new wake GPEs by running _PRW methods
     * that may have been loaded by this table.
     */
    Status = AcpiTbGetOwnerId (i, &OwnerId);
    if (ACPI_SUCCESS (Status))
    {
        AcpiEvUpdateGpes (OwnerId);
    }

    /* Invoke table handler if present */

    if (AcpiGbl_TableHandler)
    {
        (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_LOAD, Table,
            AcpiGbl_TableHandlerContext);
    }
    (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);

UnlockAndExit:
    *TableIndex = i;
    (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
    return_ACPI_STATUS (Status);
}

ACPI_STATUS
AcpiExSystemMemorySpaceHandler (
    UINT32                  Function,
    ACPI_PHYSICAL_ADDRESS   Address,
    UINT32                  BitWidth,
    UINT64                  *Value,
    void                    *HandlerContext,
    void                    *RegionContext)
{
    ACPI_STATUS             Status = AE_OK;
    void                    *LogicalAddrPtr = NULL;
    ACPI_MEM_SPACE_CONTEXT  *MemInfo = RegionContext;
    UINT32                  Length;
    ACPI_SIZE               MapLength;
    ACP