| Current Path : /sys/contrib/dev/acpica/namespace/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/contrib/dev/acpica/namespace/nsobject.c |
/*******************************************************************************
*
* Module Name: nsobject - Utilities for objects attached to namespace
* table entries
*
******************************************************************************/
/*
* Copyright (C) 2000 - 2011, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#define __NSOBJECT_C__
#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>
#include <contrib/dev/acpica/include/acnamesp.h>
#define _COMPONENT ACPI_NAMESPACE
ACPI_MODULE_NAME ("nsobject")
/*******************************************************************************
*
* FUNCTION: AcpiNsAttachObject
*
* PARAMETERS: Node - Parent Node
* Object - Object to be attached
* Type - Type of object, or ACPI_TYPE_ANY if not
* known
*
* RETURN: Status
*
* DESCRIPTION: Record the given object as the value associated with the
* name whose ACPI_HANDLE is passed. If Object is NULL
* and Type is ACPI_TYPE_ANY, set the name as having no value.
* Note: Future may require that the Node->Flags field be passed
* as a parameter.
*
* MUTEX: Assumes namespace is locked
*
******************************************************************************/
ACPI_STATUS
AcpiNsAttachObject (
ACPI_NAMESPACE_NODE *Node,
ACPI_OPERAND_OBJECT *Object,
ACPI_OBJECT_TYPE Type)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_OPERAND_OBJECT *LastObjDesc;
ACPI_OBJECT_TYPE ObjectType = ACPI_TYPE_ANY;
ACPI_FUNCTION_TRACE (NsAttachObject);
/*
* Parameter validation
*/
if (!Node)
{
/* Invalid handle */
ACPI_ERROR ((AE_INFO, "Null NamedObj handle"));
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
if (!Object && (ACPI_TYPE_ANY != Type))
{
/* Null object */
ACPI_ERROR ((AE_INFO,
"Null object, but type not ACPI_TYPE_ANY"));
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED)
{
/* Not a name handle */
ACPI_ERROR ((AE_INFO, "Invalid handle %p [%s]",
Node, AcpiUtGetDescriptorName (Node)));
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Check if this object is already attached */
if (Node->Object == Object)
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Obj %p already installed in NameObj %p\n",
Object, Node));
return_ACPI_STATUS (AE_OK);
}
/* If null object, we will just install it */
if (!Object)
{
ObjDesc = NULL;
ObjectType = ACPI_TYPE_ANY;
}
/*
* If the source object is a namespace Node with an attached object,
* we will use that (attached) object
*/
else if ((ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_NAMED) &&
((ACPI_NAMESPACE_NODE *) Object)->Object)
{
/*
* Value passed is a name handle and that name has a
* non-null value. Use that name's value and type.
*/
ObjDesc = ((ACPI_NAMESPACE_NODE *) Object)->Object;
ObjectType = ((ACPI_NAMESPACE_NODE *) Object)->Type;
}
/*
* Otherwise, we will use the parameter object, but we must type
* it first
*/
else
{
ObjDesc = (ACPI_OPERAND_OBJECT *) Object;
/* Use the given type */
ObjectType = Type;
}
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Installing %p into Node %p [%4.4s]\n",
ObjDesc, Node, AcpiUtGetNodeName (Node)));
/* Detach an existing attached object if present */
if (Node->Object)
{
AcpiNsDetachObject (Node);
}
if (ObjDesc)
{
/*
* Must increment the new value's reference count
* (if it is an internal object)
*/
AcpiUtAddReference (ObjDesc);
/*
* Handle objects with multiple descriptors - walk
* to the end of the descriptor list
*/
LastObjDesc = ObjDesc;
while (LastObjDesc->Common.NextObject)
{
LastObjDesc = LastObjDesc->Common.NextObject;
}
/* Install the object at the front of the object list */
LastObjDesc->Common.NextObject = Node->Object;
}
Node->Type = (UINT8) ObjectType;
Node->Object = ObjDesc;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsDetachObject
*
* PARAMETERS: Node - A Namespace node whose object will be detached
*
* RETURN: None.
*
* DESCRIPTION: Detach/delete an object associated with a namespace node.
* if the object is an allocated object, it is freed.
* Otherwise, the field is simply cleared.
*
******************************************************************************/
void
AcpiNsDetachObject (
ACPI_NAMESPACE_NODE *Node)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_FUNCTION_TRACE (NsDetachObject);
ObjDesc = Node->Object;
if (!ObjDesc ||
(ObjDesc->Common.Type == ACPI_TYPE_LOCAL_DATA))
{
return_VOID;
}
if (Node->Flags & ANOBJ_ALLOCATED_BUFFER)
{
/* Free the dynamic aml buffer */
if (ObjDesc->Common.Type == ACPI_TYPE_METHOD)
{
ACPI_FREE (ObjDesc->Method.AmlStart);
}
}
/* Clear the entry in all cases */
Node->Object = NULL;
if (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc) == ACPI_DESC_TYPE_OPERAND)
{
Node->Object = ObjDesc->Common.NextObject;
if (Node->Object &&
((Node->Object)->Common.Type != ACPI_TYPE_LOCAL_DATA))
{
Node->Object = Node->Object->Common.NextObject;
}
}
/* Reset the node type to untyped */
Node->Type = ACPI_TYPE_ANY;
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Node %p [%4.4s] Object %p\n",
Node, AcpiUtGetNodeName (Node), ObjDesc));
/* Remove one reference on the object (and all subobjects) */
AcpiUtRemoveReference (ObjDesc);
return_VOID;
}
/*******************************************************************************
*
* FUNCTION: AcpiNsGetAttachedObject
*
* PARAMETERS: Node - Namespace node
*
* RETURN: Current value of the object field from the Node whose
* handle is passed
*
* DESCRIPTION: Obtain the object attached to a namespace node.
*
******************************************************************************/
ACPI_OPERAND_OBJECT *
AcpiNsGetAttachedObject (
ACPI_NAMESPACE_NODE *Node)
{
ACPI_FUNCTION_TRACE_PTR (NsGetAttachedObject, Node);
if (!Node)
{
ACPI_WARNING ((AE_INFO, "Null Node ptr"));
return_PTR (NULL);
}
if (!Node->Object ||
((ACPI_GET_DESCRIPTOR_TYPE (Node->Object) != ACPI_DESC_TYPE_OPERAND) &&
(ACPI_GET_DESCRIPTOR_TYPE (Node->Object) != ACPI_DESC_TYPE_NAMED)) ||
((Node->Object)->Common.Type == ACPI_TYPE_LOCAL_DATA))
{
return_PTR (NULL);
}
return_PTR (Node->Object);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsGetSecondaryObject
*
* PARAMETERS: Node - Namespace node
*
* RETURN: Current value of the object field from the Node whose
* handle is passed.
*
* DESCRIPTION: Obtain a secondary object associated with a namespace node.
*
******************************************************************************/
ACPI_OPERAND_OBJECT *
AcpiNsGetSecondaryObject (
ACPI_OPERAND_OBJECT *ObjDesc)
{
ACPI_FUNCTION_TRACE_PTR (NsGetSecondaryObject, ObjDesc);
if ((!ObjDesc) ||
(ObjDesc->Common.Type== ACPI_TYPE_LOCAL_DATA) ||
(!ObjDesc->Common.NextObject) ||
((ObjDesc->Common.NextObject)->Common.Type == ACPI_TYPE_LOCAL_DATA))
{
return_PTR (NULL);
}
return_PTR (ObjDesc->Common.NextObject);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsAttachData
*
* PARAMETERS: Node - Namespace node
* Handler - Handler to be associated with the data
* Data - Data to be attached
*
* RETURN: Status
*
* DESCRIPTION: Low-level attach data. Create and attach a Data object.
*
******************************************************************************/
ACPI_STATUS
AcpiNsAttachData (
ACPI_NAMESPACE_NODE *Node,
ACPI_OBJECT_HANDLER Handler,
void *Data)
{
ACPI_OPERAND_OBJECT *PrevObjDesc;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_OPERAND_OBJECT *DataDesc;
/* We only allow one attachment per handler */
PrevObjDesc = NULL;
ObjDesc = Node->Object;
while (ObjDesc)
{
if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_DATA) &&
(ObjDesc->Data.Handler == Handler))
{
return (AE_ALREADY_EXISTS);
}
PrevObjDesc = ObjDesc;
ObjDesc = ObjDesc->Common.NextObject;
}
/* Create an internal object for the data */
DataDesc = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_DATA);
if (!DataDesc)
{
return (AE_NO_MEMORY);
}
DataDesc->Data.Handler = Handler;
DataDesc->Data.Pointer = Data;
/* Install the data object */
if (PrevObjDesc)
{
PrevObjDesc->Common.NextObject = DataDesc;
}
else
{
Node->Object = DataDesc;
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsDetachData
*
* PARAMETERS: Node - Namespace node
* Handler - Handler associated with the data
*
* RETURN: Status
*
* DESCRIPTION: Low-level detach data. Delete the data node, but the caller
* is responsible for the actual data.
*
******************************************************************************/
ACPI_STATUS
AcpiNsDetachData (
ACPI_NAMESPACE_NODE *Node,
ACPI_OBJECT_HANDLER Handler)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_OPERAND_OBJECT *PrevObjDesc;
PrevObjDesc = NULL;
ObjDesc = Node->Object;
while (ObjDesc)
{
if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_DATA) &&
(ObjDesc->Data.Handler == Handler))
{
if (PrevObjDesc)
{
PrevObjDesc->Common.NextObject = ObjDesc->Common.NextObject;
}
else
{
Node->Object = ObjDesc->Common.NextObject;
}
AcpiUtRemoveReference (ObjDesc);
return (AE_OK);
}
PrevObjDesc = ObjDesc;
ObjDesc = ObjDesc->Common.NextObject;
}
return (AE_NOT_FOUND);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsGetAttachedData
*
* PARAMETERS: Node - Namespace node
* Handler - Handler associated with the data
* Data - Where the data is returned
*
* RETURN: Status
*
* DESCRIPTION: Low level interface to obtain data previously associated with
* a namespace node.
*
******************************************************************************/
ACPI_STATUS
AcpiNsGetAttachedData (
ACPI_NAMESPACE_NODE *Node,
ACPI_OBJECT_HANDLER Handler,
void **Data)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ObjDesc = Node->Object;
while (ObjDesc)
{
if ((ObjDesc->Common.Type == ACPI_TYPE_LOCAL_DATA) &&
(ObjDesc->Data.Handler == Handler))
{
*Data = ObjDesc->Data.Pointer;
return (AE_OK);
}
ObjDesc = ObjDesc->Common.NextObject;
}
return (AE_NOT_FOUND);
}