NetBSD-5.0.2/sys/dist/acpica/utobject.c
/******************************************************************************
*
* Module Name: utobject - ACPI object create/delete/size/cache routines
* $Revision: 1.6 $
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2008, 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 __UTOBJECT_C__
#include "acpi.h"
#include "acnamesp.h"
#include "amlcode.h"
#define _COMPONENT ACPI_UTILITIES
ACPI_MODULE_NAME ("utobject")
/* Local prototypes */
static ACPI_STATUS
AcpiUtGetSimpleObjectSize (
ACPI_OPERAND_OBJECT *Obj,
ACPI_SIZE *ObjLength);
static ACPI_STATUS
AcpiUtGetPackageObjectSize (
ACPI_OPERAND_OBJECT *Obj,
ACPI_SIZE *ObjLength);
static ACPI_STATUS
AcpiUtGetElementLength (
UINT8 ObjectType,
ACPI_OPERAND_OBJECT *SourceObject,
ACPI_GENERIC_STATE *State,
void *Context);
/*******************************************************************************
*
* FUNCTION: AcpiUtCreateInternalObjectDbg
*
* PARAMETERS: ModuleName - Source file name of caller
* LineNumber - Line number of caller
* ComponentId - Component type of caller
* Type - ACPI Type of the new object
*
* RETURN: A new internal object, null on failure
*
* DESCRIPTION: Create and initialize a new internal object.
*
* NOTE: We always allocate the worst-case object descriptor because
* these objects are cached, and we want them to be
* one-size-satisifies-any-request. This in itself may not be
* the most memory efficient, but the efficiency of the object
* cache should more than make up for this!
*
******************************************************************************/
ACPI_OPERAND_OBJECT *
AcpiUtCreateInternalObjectDbg (
const char *ModuleName,
UINT32 LineNumber,
UINT32 ComponentId,
ACPI_OBJECT_TYPE Type)
{
ACPI_OPERAND_OBJECT *Object;
ACPI_OPERAND_OBJECT *SecondObject;
ACPI_FUNCTION_TRACE_STR (UtCreateInternalObjectDbg,
AcpiUtGetTypeName (Type));
/* Allocate the raw object descriptor */
Object = AcpiUtAllocateObjectDescDbg (ModuleName, LineNumber, ComponentId);
if (!Object)
{
return_PTR (NULL);
}
switch (Type)
{
case ACPI_TYPE_REGION:
case ACPI_TYPE_BUFFER_FIELD:
case ACPI_TYPE_LOCAL_BANK_FIELD:
/* These types require a secondary object */
SecondObject = AcpiUtAllocateObjectDescDbg (ModuleName,
LineNumber, ComponentId);
if (!SecondObject)
{
AcpiUtDeleteObjectDesc (Object);
return_PTR (NULL);
}
SecondObject->Common.Type = ACPI_TYPE_LOCAL_EXTRA;
SecondObject->Common.ReferenceCount = 1;
/* Link the second object to the first */
Object->Common.NextObject = SecondObject;
break;
default:
/* All others have no secondary object */
break;
}
/* Save the object type in the object descriptor */
Object->Common.Type = (UINT8) Type;
/* Init the reference count */
Object->Common.ReferenceCount = 1;
/* Any per-type initialization should go here */
return_PTR (Object);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtCreatePackageObject
*
* PARAMETERS: Count - Number of package elements
*
* RETURN: Pointer to a new Package object, null on failure
*
* DESCRIPTION: Create a fully initialized package object
*
******************************************************************************/
ACPI_OPERAND_OBJECT *
AcpiUtCreatePackageObject (
UINT32 Count)
{
ACPI_OPERAND_OBJECT *PackageDesc;
ACPI_OPERAND_OBJECT **PackageElements;
ACPI_FUNCTION_TRACE_U32 (UtCreatePackageObject, Count);
/* Create a new Package object */
PackageDesc = AcpiUtCreateInternalObject (ACPI_TYPE_PACKAGE);
if (!PackageDesc)
{
return_PTR (NULL);
}
/*
* Create the element array. Count+1 allows the array to be null
* terminated.
*/
PackageElements = ACPI_ALLOCATE_ZEROED ((ACPI_SIZE)
(Count + 1) * sizeof (void *));
if (!PackageElements)
{
ACPI_FREE (PackageDesc);
return_PTR (NULL);
}
PackageDesc->Package.Count = Count;
PackageDesc->Package.Elements = PackageElements;
return_PTR (PackageDesc);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtCreateBufferObject
*
* PARAMETERS: BufferSize - Size of buffer to be created
*
* RETURN: Pointer to a new Buffer object, null on failure
*
* DESCRIPTION: Create a fully initialized buffer object
*
******************************************************************************/
ACPI_OPERAND_OBJECT *
AcpiUtCreateBufferObject (
ACPI_SIZE BufferSize)
{
ACPI_OPERAND_OBJECT *BufferDesc;
UINT8 *Buffer = NULL;
ACPI_FUNCTION_TRACE_U32 (UtCreateBufferObject, BufferSize);
/* Create a new Buffer object */
BufferDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER);
if (!BufferDesc)
{
return_PTR (NULL);
}
/* Create an actual buffer only if size > 0 */
if (BufferSize > 0)
{
/* Allocate the actual buffer */
Buffer = ACPI_ALLOCATE_ZEROED (BufferSize);
if (!Buffer)
{
ACPI_ERROR ((AE_INFO, "Could not allocate size %X",
(UINT32) BufferSize));
AcpiUtRemoveReference (BufferDesc);
return_PTR (NULL);
}
}
/* Complete buffer object initialization */
BufferDesc->Buffer.Flags |= AOPOBJ_DATA_VALID;
BufferDesc->Buffer.Pointer = Buffer;
BufferDesc->Buffer.Length = (UINT32) BufferSize;
/* Return the new buffer descriptor */
return_PTR (BufferDesc);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtCreateStringObject
*
* PARAMETERS: StringSize - Size of string to be created. Does not
* include NULL terminator, this is added
* automatically.
*
* RETURN: Pointer to a new String object
*
* DESCRIPTION: Create a fully initialized string object
*
******************************************************************************/
ACPI_OPERAND_OBJECT *
AcpiUtCreateStringObject (
ACPI_SIZE StringSize)
{
ACPI_OPERAND_OBJECT *StringDesc;
char *String;
ACPI_FUNCTION_TRACE_U32 (UtCreateStringObject, StringSize);
/* Create a new String object */
StringDesc = AcpiUtCreateInternalObject (ACPI_TYPE_STRING);
if (!StringDesc)
{
return_PTR (NULL);
}
/*
* Allocate the actual string buffer -- (Size + 1) for NULL terminator.
* NOTE: Zero-length strings are NULL terminated
*/
String = ACPI_ALLOCATE_ZEROED (StringSize + 1);
if (!String)
{
ACPI_ERROR ((AE_INFO, "Could not allocate size %X",
(UINT32) StringSize));
AcpiUtRemoveReference (StringDesc);
return_PTR (NULL);
}
/* Complete string object initialization */
StringDesc->String.Pointer = String;
StringDesc->String.Length = (UINT32) StringSize;
/* Return the new string descriptor */
return_PTR (StringDesc);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtValidInternalObject
*
* PARAMETERS: Object - Object to be validated
*
* RETURN: TRUE if object is valid, FALSE otherwise
*
* DESCRIPTION: Validate a pointer to be an ACPI_OPERAND_OBJECT
*
******************************************************************************/
BOOLEAN
AcpiUtValidInternalObject (
void *Object)
{
ACPI_FUNCTION_NAME (UtValidInternalObject);
/* Check for a null pointer */
if (!Object)
{
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "**** Null Object Ptr\n"));
return (FALSE);
}
/* Check the descriptor type field */
switch (ACPI_GET_DESCRIPTOR_TYPE (Object))
{
case ACPI_DESC_TYPE_OPERAND:
/* The object appears to be a valid ACPI_OPERAND_OBJECT */
return (TRUE);
default:
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"%p is not not an ACPI operand obj [%s]\n",
Object, AcpiUtGetDescriptorName (Object)));
break;
}
return (FALSE);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtAllocateObjectDescDbg
*
* PARAMETERS: ModuleName - Caller's module name (for error output)
* LineNumber - Caller's line number (for error output)
* ComponentId - Caller's component ID (for error output)
*
* RETURN: Pointer to newly allocated object descriptor. Null on error
*
* DESCRIPTION: Allocate a new object descriptor. Gracefully handle
* error conditions.
*
******************************************************************************/
void *
AcpiUtAllocateObjectDescDbg (
const char *ModuleName,
UINT32 LineNumber,
UINT32 ComponentId)
{
ACPI_OPERAND_OBJECT *Object;
ACPI_FUNCTION_TRACE (UtAllocateObjectDescDbg);
Object = AcpiOsAcquireObject (AcpiGbl_OperandCache);
if (!Object)
{
ACPI_ERROR ((ModuleName, LineNumber,
"Could not allocate an object descriptor"));
return_PTR (NULL);
}
/* Mark the descriptor type */
ACPI_SET_DESCRIPTOR_TYPE (Object, ACPI_DESC_TYPE_OPERAND);
ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "%p Size %X\n",
Object, (UINT32) sizeof (ACPI_OPERAND_OBJECT)));
return_PTR (Object);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtDeleteObjectDesc
*
* PARAMETERS: Object - An Acpi internal object to be deleted
*
* RETURN: None.
*
* DESCRIPTION: Free an ACPI object descriptor or add it to the object cache
*
******************************************************************************/
void
AcpiUtDeleteObjectDesc (
ACPI_OPERAND_OBJECT *Object)
{
ACPI_FUNCTION_TRACE_PTR (UtDeleteObjectDesc, Object);
/* Object must be an ACPI_OPERAND_OBJECT */
if (ACPI_GET_DESCRIPTOR_TYPE (Object) != ACPI_DESC_TYPE_OPERAND)
{
ACPI_ERROR ((AE_INFO,
"%p is not an ACPI Operand object [%s]", Object,
AcpiUtGetDescriptorName (Object)));
return_VOID;
}
(void) AcpiOsReleaseObject (AcpiGbl_OperandCache, Object);
return_VOID;
}
/*******************************************************************************
*
* FUNCTION: AcpiUtGetSimpleObjectSize
*
* PARAMETERS: InternalObject - An ACPI operand object
* ObjLength - Where the length is returned
*
* RETURN: Status
*
* DESCRIPTION: This function is called to determine the space required to
* contain a simple object for return to an external user.
*
* The length includes the object structure plus any additional
* needed space.
*
******************************************************************************/
static ACPI_STATUS
AcpiUtGetSimpleObjectSize (
ACPI_OPERAND_OBJECT *InternalObject,
ACPI_SIZE *ObjLength)
{
ACPI_SIZE Length;
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE_PTR (UtGetSimpleObjectSize, InternalObject);
/* Start with the length of the (external) Acpi object */
Length = sizeof (ACPI_OBJECT);
/* A NULL object is allowed, can be a legal uninitialized package element */
if (!InternalObject)
{
/*
* Object is NULL, just return the length of ACPI_OBJECT
* (A NULL ACPI_OBJECT is an object of all zeroes.)
*/
*ObjLength = ACPI_ROUND_UP_TO_NATIVE_WORD (Length);
return_ACPI_STATUS (AE_OK);
}
/* A Namespace Node should never appear here */
if (ACPI_GET_DESCRIPTOR_TYPE (InternalObject) == ACPI_DESC_TYPE_NAMED)
{
/* A namespace node should never get here */
return_ACPI_STATUS (AE_AML_INTERNAL);
}
/*
* The final length depends on the object type
* Strings and Buffers are packed right up against the parent object and
* must be accessed bytewise or there may be alignment problems on
* certain processors
*/
switch (ACPI_GET_OBJECT_TYPE (InternalObject))
{
case ACPI_TYPE_STRING:
Length += (ACPI_SIZE) InternalObject->String.Length + 1;
break;
case ACPI_TYPE_BUFFER:
Length += (ACPI_SIZE) InternalObject->Buffer.Length;
break;
case ACPI_TYPE_INTEGER:
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_POWER:
/* No extra data for these types */
break;
case ACPI_TYPE_LOCAL_REFERENCE:
switch (InternalObject->Reference.Opcode)
{
case AML_INT_NAMEPATH_OP:
/*
* Get the actual length of the full pathname to this object.
* The reference will be converted to the pathname to the object
*/
Length += ACPI_ROUND_UP_TO_NATIVE_WORD (
AcpiNsGetPathnameLength (InternalObject->Reference.Node));
break;
default:
/*
* No other reference opcodes are supported.
* Notably, Locals and Args are not supported, but this may be
* required eventually.
*/
ACPI_ERROR ((AE_INFO,
"Unsupported Reference opcode=%X in object %p",
InternalObject->Reference.Opcode, InternalObject));
Status = AE_TYPE;
break;
}
break;
default:
ACPI_ERROR ((AE_INFO, "Unsupported type=%X in object %p",
ACPI_GET_OBJECT_TYPE (InternalObject), InternalObject));
Status = AE_TYPE;
break;
}
/*
* Account for the space required by the object rounded up to the next
* multiple of the machine word size. This keeps each object aligned
* on a machine word boundary. (preventing alignment faults on some
* machines.)
*/
*ObjLength = ACPI_ROUND_UP_TO_NATIVE_WORD (Length);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtGetElementLength
*
* PARAMETERS: ACPI_PKG_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Get the length of one package element.
*
******************************************************************************/
static ACPI_STATUS
AcpiUtGetElementLength (
UINT8 ObjectType,
ACPI_OPERAND_OBJECT *SourceObject,
ACPI_GENERIC_STATE *State,
void *Context)
{
ACPI_STATUS Status = AE_OK;
ACPI_PKG_INFO *Info = (ACPI_PKG_INFO *) Context;
ACPI_SIZE ObjectSpace;
switch (ObjectType)
{
case ACPI_COPY_TYPE_SIMPLE:
/*
* Simple object - just get the size (Null object/entry is handled
* here also) and sum it into the running package length
*/
Status = AcpiUtGetSimpleObjectSize (SourceObject, &ObjectSpace);
if (ACPI_FAILURE (Status))
{
return (Status);
}
Info->Length += ObjectSpace;
break;
case ACPI_COPY_TYPE_PACKAGE:
/* Package object - nothing much to do here, let the walk handle it */
Info->NumPackages++;
State->Pkg.ThisTargetObj = NULL;
break;
default:
/* No other types allowed */
return (AE_BAD_PARAMETER);
}
return (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtGetPackageObjectSize
*
* PARAMETERS: InternalObject - An ACPI internal object
* ObjLength - Where the length is returned
*
* RETURN: Status
*
* DESCRIPTION: This function is called to determine the space required to
* contain a package object for return to an external user.
*
* This is moderately complex since a package contains other
* objects including packages.
*
******************************************************************************/
static ACPI_STATUS
AcpiUtGetPackageObjectSize (
ACPI_OPERAND_OBJECT *InternalObject,
ACPI_SIZE *ObjLength)
{
ACPI_STATUS Status;
ACPI_PKG_INFO Info;
ACPI_FUNCTION_TRACE_PTR (UtGetPackageObjectSize, InternalObject);
Info.Length = 0;
Info.ObjectSpace = 0;
Info.NumPackages = 1;
Status = AcpiUtWalkPackageTree (InternalObject, NULL,
AcpiUtGetElementLength, &Info);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* We have handled all of the objects in all levels of the package.
* just add the length of the package objects themselves.
* Round up to the next machine word.
*/
Info.Length += ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (ACPI_OBJECT)) *
(ACPI_SIZE) Info.NumPackages;
/* Return the total package length */
*ObjLength = Info.Length;
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtGetObjectSize
*
* PARAMETERS: InternalObject - An ACPI internal object
* ObjLength - Where the length will be returned
*
* RETURN: Status
*
* DESCRIPTION: This function is called to determine the space required to
* contain an object for return to an API user.
*
******************************************************************************/
ACPI_STATUS
AcpiUtGetObjectSize (
ACPI_OPERAND_OBJECT *InternalObject,
ACPI_SIZE *ObjLength)
{
ACPI_STATUS Status;
ACPI_FUNCTION_ENTRY ();
if ((ACPI_GET_DESCRIPTOR_TYPE (InternalObject) == ACPI_DESC_TYPE_OPERAND) &&
(ACPI_GET_OBJECT_TYPE (InternalObject) == ACPI_TYPE_PACKAGE))
{
Status = AcpiUtGetPackageObjectSize (InternalObject, ObjLength);
}
else
{
Status = AcpiUtGetSimpleObjectSize (InternalObject, ObjLength);
}
return (Status);
}