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minix/drivers/acpi/utilities/utcopy.c
Tomas Hruby 9560b6dea8 ACPI driver 
- 99% of the code is Intel's ACPICA. The license is compliant with BSD
  and GNU and virtually all systems that use ACPI use this code, For
  instance it is part of the Linux kernel.

- The only minix specific files are

  acpi.c
  osminixxf.c
  platform/acminix.h

  and

  include/minix/acpi.h

- At the moment the driver does not register interrupt hooks which I
  believe is mainly for handling PnP, events like "battery level is
  low" and power management. Should not be difficult to add it if need
  be.

- The interface to the outside world is virtually non-existent except
  a trivial message based service for PCI driver to query which device
  is connected to what IRQ line. This will evolve as more components
  start using this driver. VM, Scheduler and IOMMU are the possible
  users right now.

- because of dependency on a native 64bit (long long, part of c99) it
  is compiled only with a gnu-like compilers which in case of Minix
  includes gcc llvm-gcc and clang
2010-09-02 15:44:04 +00:00

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/******************************************************************************
*
* Module Name: utcopy - Internal to external object translation utilities
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2010, Intel Corp.
* All rights reserved.
*
* 2. License
*
* 2.1. This is your license from Intel Corp. under its intellectual property
* rights. You may have additional license terms from the party that provided
* you this software, covering your right to use that party's intellectual
* property rights.
*
* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
* copy of the source code appearing in this file ("Covered Code") an
* irrevocable, perpetual, worldwide license under Intel's copyrights in the
* base code distributed originally by Intel ("Original Intel Code") to copy,
* make derivatives, distribute, use and display any portion of the Covered
* Code in any form, with the right to sublicense such rights; and
*
* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
* license (with the right to sublicense), under only those claims of Intel
* patents that are infringed by the Original Intel Code, to make, use, sell,
* offer to sell, and import the Covered Code and derivative works thereof
* solely to the minimum extent necessary to exercise the above copyright
* license, and in no event shall the patent license extend to any additions
* to or modifications of the Original Intel Code. No other license or right
* is granted directly or by implication, estoppel or otherwise;
*
* The above copyright and patent license is granted only if the following
* conditions are met:
*
* 3. Conditions
*
* 3.1. Redistribution of Source with Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification with rights to further distribute source must include
* the above Copyright Notice, the above License, this list of Conditions,
* and the following Disclaimer and Export Compliance provision. In addition,
* Licensee must cause all Covered Code to which Licensee contributes to
* contain a file documenting the changes Licensee made to create that Covered
* Code and the date of any change. Licensee must include in that file the
* documentation of any changes made by any predecessor Licensee. Licensee
* must include a prominent statement that the modification is derived,
* directly or indirectly, from Original Intel Code.
*
* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification without rights to further distribute source must
* include the following Disclaimer and Export Compliance provision in the
* documentation and/or other materials provided with distribution. In
* addition, Licensee may not authorize further sublicense of source of any
* portion of the Covered Code, and must include terms to the effect that the
* license from Licensee to its licensee is limited to the intellectual
* property embodied in the software Licensee provides to its licensee, and
* not to intellectual property embodied in modifications its licensee may
* make.
*
* 3.3. Redistribution of Executable. Redistribution in executable form of any
* substantial portion of the Covered Code or modification must reproduce the
* above Copyright Notice, and the following Disclaimer and Export Compliance
* provision in the documentation and/or other materials provided with the
* distribution.
*
* 3.4. Intel retains all right, title, and interest in and to the Original
* Intel Code.
*
* 3.5. Neither the name Intel nor any other trademark owned or controlled by
* Intel shall be used in advertising or otherwise to promote the sale, use or
* other dealings in products derived from or relating to the Covered Code
* without prior written authorization from Intel.
*
* 4. Disclaimer and Export Compliance
*
* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
* PARTICULAR PURPOSE.
*
* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
* LIMITED REMEDY.
*
* 4.3. Licensee shall not export, either directly or indirectly, any of this
* software or system incorporating such software without first obtaining any
* required license or other approval from the U. S. Department of Commerce or
* any other agency or department of the United States Government. In the
* event Licensee exports any such software from the United States or
* re-exports any such software from a foreign destination, Licensee shall
* ensure that the distribution and export/re-export of the software is in
* compliance with all laws, regulations, orders, or other restrictions of the
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
* any of its subsidiaries will export/re-export any technical data, process,
* software, or service, directly or indirectly, to any country for which the
* United States government or any agency thereof requires an export license,
* other governmental approval, or letter of assurance, without first obtaining
* such license, approval or letter.
*
*****************************************************************************/
#define __UTCOPY_C__
#include "acpi.h"
#include "accommon.h"
#include "acnamesp.h"
#define _COMPONENT ACPI_UTILITIES
ACPI_MODULE_NAME ("utcopy")
/* Local prototypes */
static ACPI_STATUS
AcpiUtCopyIsimpleToEsimple (
ACPI_OPERAND_OBJECT *InternalObject,
ACPI_OBJECT *ExternalObject,
UINT8 *DataSpace,
ACPI_SIZE *BufferSpaceUsed);
static ACPI_STATUS
AcpiUtCopyIelementToIelement (
UINT8 ObjectType,
ACPI_OPERAND_OBJECT *SourceObject,
ACPI_GENERIC_STATE *State,
void *Context);
static ACPI_STATUS
AcpiUtCopyIpackageToEpackage (
ACPI_OPERAND_OBJECT *InternalObject,
UINT8 *Buffer,
ACPI_SIZE *SpaceUsed);
static ACPI_STATUS
AcpiUtCopyEsimpleToIsimple(
ACPI_OBJECT *UserObj,
ACPI_OPERAND_OBJECT **ReturnObj);
static ACPI_STATUS
AcpiUtCopyEpackageToIpackage (
ACPI_OBJECT *ExternalObject,
ACPI_OPERAND_OBJECT **InternalObject);
static ACPI_STATUS
AcpiUtCopySimpleObject (
ACPI_OPERAND_OBJECT *SourceDesc,
ACPI_OPERAND_OBJECT *DestDesc);
static ACPI_STATUS
AcpiUtCopyIelementToEelement (
UINT8 ObjectType,
ACPI_OPERAND_OBJECT *SourceObject,
ACPI_GENERIC_STATE *State,
void *Context);
static ACPI_STATUS
AcpiUtCopyIpackageToIpackage (
ACPI_OPERAND_OBJECT *SourceObj,
ACPI_OPERAND_OBJECT *DestObj,
ACPI_WALK_STATE *WalkState);
/*******************************************************************************
*
* FUNCTION: AcpiUtCopyIsimpleToEsimple
*
* PARAMETERS: InternalObject - Source object to be copied
* ExternalObject - Where to return the copied object
* DataSpace - Where object data is returned (such as
* buffer and string data)
* BufferSpaceUsed - Length of DataSpace that was used
*
* RETURN: Status
*
* DESCRIPTION: This function is called to copy a simple internal object to
* an external object.
*
* The DataSpace buffer is assumed to have sufficient space for
* the object.
*
******************************************************************************/
static ACPI_STATUS
AcpiUtCopyIsimpleToEsimple (
ACPI_OPERAND_OBJECT *InternalObject,
ACPI_OBJECT *ExternalObject,
UINT8 *DataSpace,
ACPI_SIZE *BufferSpaceUsed)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (UtCopyIsimpleToEsimple);
*BufferSpaceUsed = 0;
/*
* Check for NULL object case (could be an uninitialized
* package element)
*/
if (!InternalObject)
{
return_ACPI_STATUS (AE_OK);
}
/* Always clear the external object */
ACPI_MEMSET (ExternalObject, 0, sizeof (ACPI_OBJECT));
/*
* In general, the external object will be the same type as
* the internal object
*/
ExternalObject->Type = InternalObject->Common.Type;
/* However, only a limited number of external types are supported */
switch (InternalObject->Common.Type)
{
case ACPI_TYPE_STRING:
ExternalObject->String.Pointer = (char *) DataSpace;
ExternalObject->String.Length = InternalObject->String.Length;
*BufferSpaceUsed = ACPI_ROUND_UP_TO_NATIVE_WORD (
(ACPI_SIZE) InternalObject->String.Length + 1);
ACPI_MEMCPY ((void *) DataSpace,
(void *) InternalObject->String.Pointer,
(ACPI_SIZE) InternalObject->String.Length + 1);
break;
case ACPI_TYPE_BUFFER:
ExternalObject->Buffer.Pointer = DataSpace;
ExternalObject->Buffer.Length = InternalObject->Buffer.Length;
*BufferSpaceUsed = ACPI_ROUND_UP_TO_NATIVE_WORD (
InternalObject->String.Length);
ACPI_MEMCPY ((void *) DataSpace,
(void *) InternalObject->Buffer.Pointer,
InternalObject->Buffer.Length);
break;
case ACPI_TYPE_INTEGER:
ExternalObject->Integer.Value = InternalObject->Integer.Value;
break;
case ACPI_TYPE_LOCAL_REFERENCE:
/* This is an object reference. */
switch (InternalObject->Reference.Class)
{
case ACPI_REFCLASS_NAME:
/*
* For namepath, return the object handle ("reference")
* We are referring to the namespace node
*/
ExternalObject->Reference.Handle =
InternalObject->Reference.Node;
ExternalObject->Reference.ActualType =
AcpiNsGetType (InternalObject->Reference.Node);
break;
default:
/* All other reference types are unsupported */
return_ACPI_STATUS (AE_TYPE);
}
break;
case ACPI_TYPE_PROCESSOR:
ExternalObject->Processor.ProcId =
InternalObject->Processor.ProcId;
ExternalObject->Processor.PblkAddress =
InternalObject->Processor.Address;
ExternalObject->Processor.PblkLength =
InternalObject->Processor.Length;
break;
case ACPI_TYPE_POWER:
ExternalObject->PowerResource.SystemLevel =
InternalObject->PowerResource.SystemLevel;
ExternalObject->PowerResource.ResourceOrder =
InternalObject->PowerResource.ResourceOrder;
break;
default:
/*
* There is no corresponding external object type
*/
ACPI_ERROR ((AE_INFO,
"Unsupported object type, cannot convert to external object: %s",
AcpiUtGetTypeName (InternalObject->Common.Type)));
return_ACPI_STATUS (AE_SUPPORT);
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtCopyIelementToEelement
*
* PARAMETERS: ACPI_PKG_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Copy one package element to another package element
*
******************************************************************************/
static ACPI_STATUS
AcpiUtCopyIelementToEelement (
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;
UINT32 ThisIndex;
ACPI_OBJECT *TargetObject;
ACPI_FUNCTION_ENTRY ();
ThisIndex = State->Pkg.Index;
TargetObject = (ACPI_OBJECT *)
&((ACPI_OBJECT *)(State->Pkg.DestObject))->Package.Elements[ThisIndex];
switch (ObjectType)
{
case ACPI_COPY_TYPE_SIMPLE:
/*
* This is a simple or null object
*/
Status = AcpiUtCopyIsimpleToEsimple (SourceObject,
TargetObject, Info->FreeSpace, &ObjectSpace);
if (ACPI_FAILURE (Status))
{
return (Status);
}
break;
case ACPI_COPY_TYPE_PACKAGE:
/*
* Build the package object
*/
TargetObject->Type = ACPI_TYPE_PACKAGE;
TargetObject->Package.Count = SourceObject->Package.Count;
TargetObject->Package.Elements =
ACPI_CAST_PTR (ACPI_OBJECT, Info->FreeSpace);
/*
* Pass the new package object back to the package walk routine
*/
State->Pkg.ThisTargetObj = TargetObject;
/*
* Save space for the array of objects (Package elements)
* update the buffer length counter
*/
ObjectSpace = ACPI_ROUND_UP_TO_NATIVE_WORD (
(ACPI_SIZE) TargetObject->Package.Count *
sizeof (ACPI_OBJECT));
break;
default:
return (AE_BAD_PARAMETER);
}
Info->FreeSpace += ObjectSpace;
Info->Length += ObjectSpace;
return (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtCopyIpackageToEpackage
*
* PARAMETERS: InternalObject - Pointer to the object we are returning
* Buffer - Where the object is returned
* SpaceUsed - Where the object length is returned
*
* RETURN: Status
*
* DESCRIPTION: This function is called to place a package object in a user
* buffer. A package object by definition contains other objects.
*
* The buffer is assumed to have sufficient space for the object.
* The caller must have verified the buffer length needed using
* the AcpiUtGetObjectSize function before calling this function.
*
******************************************************************************/
static ACPI_STATUS
AcpiUtCopyIpackageToEpackage (
ACPI_OPERAND_OBJECT *InternalObject,
UINT8 *Buffer,
ACPI_SIZE *SpaceUsed)
{
ACPI_OBJECT *ExternalObject;
ACPI_STATUS Status;
ACPI_PKG_INFO Info;
ACPI_FUNCTION_TRACE (UtCopyIpackageToEpackage);
/*
* First package at head of the buffer
*/
ExternalObject = ACPI_CAST_PTR (ACPI_OBJECT, Buffer);
/*
* Free space begins right after the first package
*/
Info.Length = ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (ACPI_OBJECT));
Info.FreeSpace = Buffer + ACPI_ROUND_UP_TO_NATIVE_WORD (
sizeof (ACPI_OBJECT));
Info.ObjectSpace = 0;
Info.NumPackages = 1;
ExternalObject->Type = InternalObject->Common.Type;
ExternalObject->Package.Count = InternalObject->Package.Count;
ExternalObject->Package.Elements = ACPI_CAST_PTR (ACPI_OBJECT,
Info.FreeSpace);
/*
* Leave room for an array of ACPI_OBJECTS in the buffer
* and move the free space past it
*/
Info.Length += (ACPI_SIZE) ExternalObject->Package.Count *
ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (ACPI_OBJECT));
Info.FreeSpace += ExternalObject->Package.Count *
ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (ACPI_OBJECT));
Status = AcpiUtWalkPackageTree (InternalObject, ExternalObject,
AcpiUtCopyIelementToEelement, &Info);
*SpaceUsed = Info.Length;
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtCopyIobjectToEobject
*
* PARAMETERS: InternalObject - The internal object to be converted
* RetBuffer - Where the object is returned
*
* RETURN: Status
*
* DESCRIPTION: This function is called to build an API object to be returned
* to the caller.
*
******************************************************************************/
ACPI_STATUS
AcpiUtCopyIobjectToEobject (
ACPI_OPERAND_OBJECT *InternalObject,
ACPI_BUFFER *RetBuffer)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (UtCopyIobjectToEobject);
if (InternalObject->Common.Type == ACPI_TYPE_PACKAGE)
{
/*
* Package object: Copy all subobjects (including
* nested packages)
*/
Status = AcpiUtCopyIpackageToEpackage (InternalObject,
RetBuffer->Pointer, &RetBuffer->Length);
}
else
{
/*
* Build a simple object (no nested objects)
*/
Status = AcpiUtCopyIsimpleToEsimple (InternalObject,
ACPI_CAST_PTR (ACPI_OBJECT, RetBuffer->Pointer),
ACPI_ADD_PTR (UINT8, RetBuffer->Pointer,
ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (ACPI_OBJECT))),
&RetBuffer->Length);
/*
* build simple does not include the object size in the length
* so we add it in here
*/
RetBuffer->Length += sizeof (ACPI_OBJECT);
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtCopyEsimpleToIsimple
*
* PARAMETERS: ExternalObject - The external object to be converted
* RetInternalObject - Where the internal object is returned
*
* RETURN: Status
*
* DESCRIPTION: This function copies an external object to an internal one.
* NOTE: Pointers can be copied, we don't need to copy data.
* (The pointers have to be valid in our address space no matter
* what we do with them!)
*
******************************************************************************/
static ACPI_STATUS
AcpiUtCopyEsimpleToIsimple (
ACPI_OBJECT *ExternalObject,
ACPI_OPERAND_OBJECT **RetInternalObject)
{
ACPI_OPERAND_OBJECT *InternalObject;
ACPI_FUNCTION_TRACE (UtCopyEsimpleToIsimple);
/*
* Simple types supported are: String, Buffer, Integer
*/
switch (ExternalObject->Type)
{
case ACPI_TYPE_STRING:
case ACPI_TYPE_BUFFER:
case ACPI_TYPE_INTEGER:
case ACPI_TYPE_LOCAL_REFERENCE:
InternalObject = AcpiUtCreateInternalObject (
(UINT8) ExternalObject->Type);
if (!InternalObject)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
break;
case ACPI_TYPE_ANY: /* This is the case for a NULL object */
*RetInternalObject = NULL;
return_ACPI_STATUS (AE_OK);
default:
/* All other types are not supported */
ACPI_ERROR ((AE_INFO,
"Unsupported object type, cannot convert to internal object: %s",
AcpiUtGetTypeName (ExternalObject->Type)));
return_ACPI_STATUS (AE_SUPPORT);
}
/* Must COPY string and buffer contents */
switch (ExternalObject->Type)
{
case ACPI_TYPE_STRING:
InternalObject->String.Pointer =
ACPI_ALLOCATE_ZEROED ((ACPI_SIZE)
ExternalObject->String.Length + 1);
if (!InternalObject->String.Pointer)
{
goto ErrorExit;
}
ACPI_MEMCPY (InternalObject->String.Pointer,
ExternalObject->String.Pointer,
ExternalObject->String.Length);
InternalObject->String.Length = ExternalObject->String.Length;
break;
case ACPI_TYPE_BUFFER:
InternalObject->Buffer.Pointer =
ACPI_ALLOCATE_ZEROED (ExternalObject->Buffer.Length);
if (!InternalObject->Buffer.Pointer)
{
goto ErrorExit;
}
ACPI_MEMCPY (InternalObject->Buffer.Pointer,
ExternalObject->Buffer.Pointer,
ExternalObject->Buffer.Length);
InternalObject->Buffer.Length = ExternalObject->Buffer.Length;
/* Mark buffer data valid */
InternalObject->Buffer.Flags |= AOPOBJ_DATA_VALID;
break;
case ACPI_TYPE_INTEGER:
InternalObject->Integer.Value = ExternalObject->Integer.Value;
break;
case ACPI_TYPE_LOCAL_REFERENCE:
/* TBD: should validate incoming handle */
InternalObject->Reference.Class = ACPI_REFCLASS_NAME;
InternalObject->Reference.Node = ExternalObject->Reference.Handle;
break;
default:
/* Other types can't get here */
break;
}
*RetInternalObject = InternalObject;
return_ACPI_STATUS (AE_OK);
ErrorExit:
AcpiUtRemoveReference (InternalObject);
return_ACPI_STATUS (AE_NO_MEMORY);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtCopyEpackageToIpackage
*
* PARAMETERS: ExternalObject - The external object to be converted
* InternalObject - Where the internal object is returned
*
* RETURN: Status
*
* DESCRIPTION: Copy an external package object to an internal package.
* Handles nested packages.
*
******************************************************************************/
static ACPI_STATUS
AcpiUtCopyEpackageToIpackage (
ACPI_OBJECT *ExternalObject,
ACPI_OPERAND_OBJECT **InternalObject)
{
ACPI_STATUS Status = AE_OK;
ACPI_OPERAND_OBJECT *PackageObject;
ACPI_OPERAND_OBJECT **PackageElements;
UINT32 i;
ACPI_FUNCTION_TRACE (UtCopyEpackageToIpackage);
/* Create the package object */
PackageObject = AcpiUtCreatePackageObject (ExternalObject->Package.Count);
if (!PackageObject)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
PackageElements = PackageObject->Package.Elements;
/*
* Recursive implementation. Probably ok, since nested external packages
* as parameters should be very rare.
*/
for (i = 0; i < ExternalObject->Package.Count; i++)
{
Status = AcpiUtCopyEobjectToIobject (
&ExternalObject->Package.Elements[i],
&PackageElements[i]);
if (ACPI_FAILURE (Status))
{
/* Truncate package and delete it */
PackageObject->Package.Count = i;
PackageElements[i] = NULL;
AcpiUtRemoveReference (PackageObject);
return_ACPI_STATUS (Status);
}
}
/* Mark package data valid */
PackageObject->Package.Flags |= AOPOBJ_DATA_VALID;
*InternalObject = PackageObject;
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtCopyEobjectToIobject
*
* PARAMETERS: ExternalObject - The external object to be converted
* InternalObject - Where the internal object is returned
*
* RETURN: Status
*
* DESCRIPTION: Converts an external object to an internal object.
*
******************************************************************************/
ACPI_STATUS
AcpiUtCopyEobjectToIobject (
ACPI_OBJECT *ExternalObject,
ACPI_OPERAND_OBJECT **InternalObject)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (UtCopyEobjectToIobject);
if (ExternalObject->Type == ACPI_TYPE_PACKAGE)
{
Status = AcpiUtCopyEpackageToIpackage (ExternalObject, InternalObject);
}
else
{
/*
* Build a simple object (no nested objects)
*/
Status = AcpiUtCopyEsimpleToIsimple (ExternalObject, InternalObject);
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtCopySimpleObject
*
* PARAMETERS: SourceDesc - The internal object to be copied
* DestDesc - New target object
*
* RETURN: Status
*
* DESCRIPTION: Simple copy of one internal object to another. Reference count
* of the destination object is preserved.
*
******************************************************************************/
static ACPI_STATUS
AcpiUtCopySimpleObject (
ACPI_OPERAND_OBJECT *SourceDesc,
ACPI_OPERAND_OBJECT *DestDesc)
{
UINT16 ReferenceCount;
ACPI_OPERAND_OBJECT *NextObject;
ACPI_STATUS Status;
ACPI_SIZE CopySize;
/* Save fields from destination that we don't want to overwrite */
ReferenceCount = DestDesc->Common.ReferenceCount;
NextObject = DestDesc->Common.NextObject;
/*
* Copy the entire source object over the destination object.
* Note: Source can be either an operand object or namespace node.
*/
CopySize = sizeof (ACPI_OPERAND_OBJECT);
if (ACPI_GET_DESCRIPTOR_TYPE (SourceDesc) == ACPI_DESC_TYPE_NAMED)
{
CopySize = sizeof (ACPI_NAMESPACE_NODE);
}
ACPI_MEMCPY (ACPI_CAST_PTR (char, DestDesc),
ACPI_CAST_PTR (char, SourceDesc), CopySize);
/* Restore the saved fields */
DestDesc->Common.ReferenceCount = ReferenceCount;
DestDesc->Common.NextObject = NextObject;
/* New object is not static, regardless of source */
DestDesc->Common.Flags &= ~AOPOBJ_STATIC_POINTER;
/* Handle the objects with extra data */
switch (DestDesc->Common.Type)
{
case ACPI_TYPE_BUFFER:
/*
* Allocate and copy the actual buffer if and only if:
* 1) There is a valid buffer pointer
* 2) The buffer has a length > 0
*/
if ((SourceDesc->Buffer.Pointer) &&
(SourceDesc->Buffer.Length))
{
DestDesc->Buffer.Pointer =
ACPI_ALLOCATE (SourceDesc->Buffer.Length);
if (!DestDesc->Buffer.Pointer)
{
return (AE_NO_MEMORY);
}
/* Copy the actual buffer data */
ACPI_MEMCPY (DestDesc->Buffer.Pointer,
SourceDesc->Buffer.Pointer, SourceDesc->Buffer.Length);
}
break;
case ACPI_TYPE_STRING:
/*
* Allocate and copy the actual string if and only if:
* 1) There is a valid string pointer
* (Pointer to a NULL string is allowed)
*/
if (SourceDesc->String.Pointer)
{
DestDesc->String.Pointer =
ACPI_ALLOCATE ((ACPI_SIZE) SourceDesc->String.Length + 1);
if (!DestDesc->String.Pointer)
{
return (AE_NO_MEMORY);
}
/* Copy the actual string data */
ACPI_MEMCPY (DestDesc->String.Pointer, SourceDesc->String.Pointer,
(ACPI_SIZE) SourceDesc->String.Length + 1);
}
break;
case ACPI_TYPE_LOCAL_REFERENCE:
/*
* We copied the reference object, so we now must add a reference
* to the object pointed to by the reference
*
* DDBHandle reference (from Load/LoadTable) is a special reference,
* it does not have a Reference.Object, so does not need to
* increase the reference count
*/
if (SourceDesc->Reference.Class == ACPI_REFCLASS_TABLE)
{
break;
}
AcpiUtAddReference (SourceDesc->Reference.Object);
break;
case ACPI_TYPE_REGION:
/*
* We copied the Region Handler, so we now must add a reference
*/
if (DestDesc->Region.Handler)
{
AcpiUtAddReference (DestDesc->Region.Handler);
}
break;
/*
* For Mutex and Event objects, we cannot simply copy the underlying
* OS object. We must create a new one.
*/
case ACPI_TYPE_MUTEX:
Status = AcpiOsCreateMutex (&DestDesc->Mutex.OsMutex);
if (ACPI_FAILURE (Status))
{
return (Status);
}
break;
case ACPI_TYPE_EVENT:
Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT, 0,
&DestDesc->Event.OsSemaphore);
if (ACPI_FAILURE (Status))
{
return (Status);
}
break;
default:
/* Nothing to do for other simple objects */
break;
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtCopyIelementToIelement
*
* PARAMETERS: ACPI_PKG_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Copy one package element to another package element
*
******************************************************************************/
static ACPI_STATUS
AcpiUtCopyIelementToIelement (
UINT8 ObjectType,
ACPI_OPERAND_OBJECT *SourceObject,
ACPI_GENERIC_STATE *State,
void *Context)
{
ACPI_STATUS Status = AE_OK;
UINT32 ThisIndex;
ACPI_OPERAND_OBJECT **ThisTargetPtr;
ACPI_OPERAND_OBJECT *TargetObject;
ACPI_FUNCTION_ENTRY ();
ThisIndex = State->Pkg.Index;
ThisTargetPtr = (ACPI_OPERAND_OBJECT **)
&State->Pkg.DestObject->Package.Elements[ThisIndex];
switch (ObjectType)
{
case ACPI_COPY_TYPE_SIMPLE:
/* A null source object indicates a (legal) null package element */
if (SourceObject)
{
/*
* This is a simple object, just copy it
*/
TargetObject = AcpiUtCreateInternalObject (
SourceObject->Common.Type);
if (!TargetObject)
{
return (AE_NO_MEMORY);
}
Status = AcpiUtCopySimpleObject (SourceObject, TargetObject);
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
*ThisTargetPtr = TargetObject;
}
else
{
/* Pass through a null element */
*ThisTargetPtr = NULL;
}
break;
case ACPI_COPY_TYPE_PACKAGE:
/*
* This object is a package - go down another nesting level
* Create and build the package object
*/
TargetObject = AcpiUtCreatePackageObject (SourceObject->Package.Count);
if (!TargetObject)
{
return (AE_NO_MEMORY);
}
TargetObject->Common.Flags = SourceObject->Common.Flags;
/* Pass the new package object back to the package walk routine */
State->Pkg.ThisTargetObj = TargetObject;
/* Store the object pointer in the parent package object */
*ThisTargetPtr = TargetObject;
break;
default:
return (AE_BAD_PARAMETER);
}
return (Status);
ErrorExit:
AcpiUtRemoveReference (TargetObject);
return (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtCopyIpackageToIpackage
*
* PARAMETERS: SourceObj - Pointer to the source package object
* DestObj - Where the internal object is returned
* WalkState - Current Walk state descriptor
*
* RETURN: Status
*
* DESCRIPTION: This function is called to copy an internal package object
* into another internal package object.
*
******************************************************************************/
static ACPI_STATUS
AcpiUtCopyIpackageToIpackage (
ACPI_OPERAND_OBJECT *SourceObj,
ACPI_OPERAND_OBJECT *DestObj,
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (UtCopyIpackageToIpackage);
DestObj->Common.Type = SourceObj->Common.Type;
DestObj->Common.Flags = SourceObj->Common.Flags;
DestObj->Package.Count = SourceObj->Package.Count;
/*
* Create the object array and walk the source package tree
*/
DestObj->Package.Elements = ACPI_ALLOCATE_ZEROED (
((ACPI_SIZE) SourceObj->Package.Count + 1) *
sizeof (void *));
if (!DestObj->Package.Elements)
{
ACPI_ERROR ((AE_INFO, "Package allocation failure"));
return_ACPI_STATUS (AE_NO_MEMORY);
}
/*
* Copy the package element-by-element by walking the package "tree".
* This handles nested packages of arbitrary depth.
*/
Status = AcpiUtWalkPackageTree (SourceObj, DestObj,
AcpiUtCopyIelementToIelement, WalkState);
if (ACPI_FAILURE (Status))
{
/* On failure, delete the destination package object */
AcpiUtRemoveReference (DestObj);
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtCopyIobjectToIobject
*
* PARAMETERS: SourceDesc - The internal object to be copied
* DestDesc - Where the copied object is returned
* WalkState - Current walk state
*
* RETURN: Status
*
* DESCRIPTION: Copy an internal object to a new internal object
*
******************************************************************************/
ACPI_STATUS
AcpiUtCopyIobjectToIobject (
ACPI_OPERAND_OBJECT *SourceDesc,
ACPI_OPERAND_OBJECT **DestDesc,
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (UtCopyIobjectToIobject);
/* Create the top level object */
*DestDesc = AcpiUtCreateInternalObject (SourceDesc->Common.Type);
if (!*DestDesc)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Copy the object and possible subobjects */
if (SourceDesc->Common.Type == ACPI_TYPE_PACKAGE)
{
Status = AcpiUtCopyIpackageToIpackage (SourceDesc, *DestDesc,
WalkState);
}
else
{
Status = AcpiUtCopySimpleObject (SourceDesc, *DestDesc);
}
return_ACPI_STATUS (Status);
}
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