minix/drivers/acpi/executer/exstore.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

603 lines
20 KiB
C

/******************************************************************************
*
* Module Name: exstore - AML Interpreter object store support
*
*****************************************************************************/
/******************************************************************************
*
* 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 __EXSTORE_C__
#include "acpi.h"
#include "accommon.h"
#include "acdispat.h"
#include "acinterp.h"
#include "amlcode.h"
#include "acnamesp.h"
#define _COMPONENT ACPI_EXECUTER
ACPI_MODULE_NAME ("exstore")
/* Local prototypes */
static ACPI_STATUS
AcpiExStoreObjectToIndex (
ACPI_OPERAND_OBJECT *ValDesc,
ACPI_OPERAND_OBJECT *DestDesc,
ACPI_WALK_STATE *WalkState);
/*******************************************************************************
*
* FUNCTION: AcpiExStore
*
* PARAMETERS: *SourceDesc - Value to be stored
* *DestDesc - Where to store it. Must be an NS node
* or an ACPI_OPERAND_OBJECT of type
* Reference;
* WalkState - Current walk state
*
* RETURN: Status
*
* DESCRIPTION: Store the value described by SourceDesc into the location
* described by DestDesc. Called by various interpreter
* functions to store the result of an operation into
* the destination operand -- not just simply the actual "Store"
* ASL operator.
*
******************************************************************************/
ACPI_STATUS
AcpiExStore (
ACPI_OPERAND_OBJECT *SourceDesc,
ACPI_OPERAND_OBJECT *DestDesc,
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status = AE_OK;
ACPI_OPERAND_OBJECT *RefDesc = DestDesc;
ACPI_FUNCTION_TRACE_PTR (ExStore, DestDesc);
/* Validate parameters */
if (!SourceDesc || !DestDesc)
{
ACPI_ERROR ((AE_INFO, "Null parameter"));
return_ACPI_STATUS (AE_AML_NO_OPERAND);
}
/* DestDesc can be either a namespace node or an ACPI object */
if (ACPI_GET_DESCRIPTOR_TYPE (DestDesc) == ACPI_DESC_TYPE_NAMED)
{
/*
* Dest is a namespace node,
* Storing an object into a Named node.
*/
Status = AcpiExStoreObjectToNode (SourceDesc,
(ACPI_NAMESPACE_NODE *) DestDesc, WalkState,
ACPI_IMPLICIT_CONVERSION);
return_ACPI_STATUS (Status);
}
/* Destination object must be a Reference or a Constant object */
switch (DestDesc->Common.Type)
{
case ACPI_TYPE_LOCAL_REFERENCE:
break;
case ACPI_TYPE_INTEGER:
/* Allow stores to Constants -- a Noop as per ACPI spec */
if (DestDesc->Common.Flags & AOPOBJ_AML_CONSTANT)
{
return_ACPI_STATUS (AE_OK);
}
/*lint -fallthrough */
default:
/* Destination is not a Reference object */
ACPI_ERROR ((AE_INFO,
"Target is not a Reference or Constant object - %s [%p]",
AcpiUtGetObjectTypeName (DestDesc), DestDesc));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
/*
* Examine the Reference class. These cases are handled:
*
* 1) Store to Name (Change the object associated with a name)
* 2) Store to an indexed area of a Buffer or Package
* 3) Store to a Method Local or Arg
* 4) Store to the debug object
*/
switch (RefDesc->Reference.Class)
{
case ACPI_REFCLASS_REFOF:
/* Storing an object into a Name "container" */
Status = AcpiExStoreObjectToNode (SourceDesc,
RefDesc->Reference.Object,
WalkState, ACPI_IMPLICIT_CONVERSION);
break;
case ACPI_REFCLASS_INDEX:
/* Storing to an Index (pointer into a packager or buffer) */
Status = AcpiExStoreObjectToIndex (SourceDesc, RefDesc, WalkState);
break;
case ACPI_REFCLASS_LOCAL:
case ACPI_REFCLASS_ARG:
/* Store to a method local/arg */
Status = AcpiDsStoreObjectToLocal (RefDesc->Reference.Class,
RefDesc->Reference.Value, SourceDesc, WalkState);
break;
case ACPI_REFCLASS_DEBUG:
/*
* Storing to the Debug object causes the value stored to be
* displayed and otherwise has no effect -- see ACPI Specification
*/
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"**** Write to Debug Object: Object %p %s ****:\n\n",
SourceDesc, AcpiUtGetObjectTypeName (SourceDesc)));
ACPI_DEBUG_OBJECT (SourceDesc, 0, 0);
break;
default:
ACPI_ERROR ((AE_INFO, "Unknown Reference Class 0x%2.2X",
RefDesc->Reference.Class));
ACPI_DUMP_ENTRY (RefDesc, ACPI_LV_INFO);
Status = AE_AML_INTERNAL;
break;
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiExStoreObjectToIndex
*
* PARAMETERS: *SourceDesc - Value to be stored
* *DestDesc - Named object to receive the value
* WalkState - Current walk state
*
* RETURN: Status
*
* DESCRIPTION: Store the object to indexed Buffer or Package element
*
******************************************************************************/
static ACPI_STATUS
AcpiExStoreObjectToIndex (
ACPI_OPERAND_OBJECT *SourceDesc,
ACPI_OPERAND_OBJECT *IndexDesc,
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status = AE_OK;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_OPERAND_OBJECT *NewDesc;
UINT8 Value = 0;
UINT32 i;
ACPI_FUNCTION_TRACE (ExStoreObjectToIndex);
/*
* Destination must be a reference pointer, and
* must point to either a buffer or a package
*/
switch (IndexDesc->Reference.TargetType)
{
case ACPI_TYPE_PACKAGE:
/*
* Storing to a package element. Copy the object and replace
* any existing object with the new object. No implicit
* conversion is performed.
*
* The object at *(IndexDesc->Reference.Where) is the
* element within the package that is to be modified.
* The parent package object is at IndexDesc->Reference.Object
*/
ObjDesc = *(IndexDesc->Reference.Where);
if (SourceDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE &&
SourceDesc->Reference.Class == ACPI_REFCLASS_TABLE)
{
/* This is a DDBHandle, just add a reference to it */
AcpiUtAddReference (SourceDesc);
NewDesc = SourceDesc;
}
else
{
/* Normal object, copy it */
Status = AcpiUtCopyIobjectToIobject (SourceDesc, &NewDesc, WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
if (ObjDesc)
{
/* Decrement reference count by the ref count of the parent package */
for (i = 0;
i < ((ACPI_OPERAND_OBJECT *)
IndexDesc->Reference.Object)->Common.ReferenceCount;
i++)
{
AcpiUtRemoveReference (ObjDesc);
}
}
*(IndexDesc->Reference.Where) = NewDesc;
/* Increment ref count by the ref count of the parent package-1 */
for (i = 1;
i < ((ACPI_OPERAND_OBJECT *)
IndexDesc->Reference.Object)->Common.ReferenceCount;
i++)
{
AcpiUtAddReference (NewDesc);
}
break;
case ACPI_TYPE_BUFFER_FIELD:
/*
* Store into a Buffer or String (not actually a real BufferField)
* at a location defined by an Index.
*
* The first 8-bit element of the source object is written to the
* 8-bit Buffer location defined by the Index destination object,
* according to the ACPI 2.0 specification.
*/
/*
* Make sure the target is a Buffer or String. An error should
* not happen here, since the ReferenceObject was constructed
* by the INDEX_OP code.
*/
ObjDesc = IndexDesc->Reference.Object;
if ((ObjDesc->Common.Type != ACPI_TYPE_BUFFER) &&
(ObjDesc->Common.Type != ACPI_TYPE_STRING))
{
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
/*
* The assignment of the individual elements will be slightly
* different for each source type.
*/
switch (SourceDesc->Common.Type)
{
case ACPI_TYPE_INTEGER:
/* Use the least-significant byte of the integer */
Value = (UINT8) (SourceDesc->Integer.Value);
break;
case ACPI_TYPE_BUFFER:
case ACPI_TYPE_STRING:
/* Note: Takes advantage of common string/buffer fields */
Value = SourceDesc->Buffer.Pointer[0];
break;
default:
/* All other types are invalid */
ACPI_ERROR ((AE_INFO,
"Source must be Integer/Buffer/String type, not %s",
AcpiUtGetObjectTypeName (SourceDesc)));
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
/* Store the source value into the target buffer byte */
ObjDesc->Buffer.Pointer[IndexDesc->Reference.Value] = Value;
break;
default:
ACPI_ERROR ((AE_INFO,
"Target is not a Package or BufferField"));
Status = AE_AML_OPERAND_TYPE;
break;
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiExStoreObjectToNode
*
* PARAMETERS: SourceDesc - Value to be stored
* Node - Named object to receive the value
* WalkState - Current walk state
* ImplicitConversion - Perform implicit conversion (yes/no)
*
* RETURN: Status
*
* DESCRIPTION: Store the object to the named object.
*
* The Assignment of an object to a named object is handled here
* The value passed in will replace the current value (if any)
* with the input value.
*
* When storing into an object the data is converted to the
* target object type then stored in the object. This means
* that the target object type (for an initialized target) will
* not be changed by a store operation.
*
* Assumes parameters are already validated.
*
******************************************************************************/
ACPI_STATUS
AcpiExStoreObjectToNode (
ACPI_OPERAND_OBJECT *SourceDesc,
ACPI_NAMESPACE_NODE *Node,
ACPI_WALK_STATE *WalkState,
UINT8 ImplicitConversion)
{
ACPI_STATUS Status = AE_OK;
ACPI_OPERAND_OBJECT *TargetDesc;
ACPI_OPERAND_OBJECT *NewDesc;
ACPI_OBJECT_TYPE TargetType;
ACPI_FUNCTION_TRACE_PTR (ExStoreObjectToNode, SourceDesc);
/* Get current type of the node, and object attached to Node */
TargetType = AcpiNsGetType (Node);
TargetDesc = AcpiNsGetAttachedObject (Node);
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Storing %p(%s) into node %p(%s)\n",
SourceDesc, AcpiUtGetObjectTypeName (SourceDesc),
Node, AcpiUtGetTypeName (TargetType)));
/*
* Resolve the source object to an actual value
* (If it is a reference object)
*/
Status = AcpiExResolveObject (&SourceDesc, TargetType, WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* If no implicit conversion, drop into the default case below */
if ((!ImplicitConversion) ||
((WalkState->Opcode == AML_COPY_OP) &&
(TargetType != ACPI_TYPE_LOCAL_REGION_FIELD) &&
(TargetType != ACPI_TYPE_LOCAL_BANK_FIELD) &&
(TargetType != ACPI_TYPE_LOCAL_INDEX_FIELD)))
{
/*
* Force execution of default (no implicit conversion). Note:
* CopyObject does not perform an implicit conversion, as per the ACPI
* spec -- except in case of region/bank/index fields -- because these
* objects must retain their original type permanently.
*/
TargetType = ACPI_TYPE_ANY;
}
/* Do the actual store operation */
switch (TargetType)
{
case ACPI_TYPE_BUFFER_FIELD:
case ACPI_TYPE_LOCAL_REGION_FIELD:
case ACPI_TYPE_LOCAL_BANK_FIELD:
case ACPI_TYPE_LOCAL_INDEX_FIELD:
/* For fields, copy the source data to the target field. */
Status = AcpiExWriteDataToField (SourceDesc, TargetDesc,
&WalkState->ResultObj);
break;
case ACPI_TYPE_INTEGER:
case ACPI_TYPE_STRING:
case ACPI_TYPE_BUFFER:
/*
* These target types are all of type Integer/String/Buffer, and
* therefore support implicit conversion before the store.
*
* Copy and/or convert the source object to a new target object
*/
Status = AcpiExStoreObjectToObject (SourceDesc, TargetDesc,
&NewDesc, WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
if (NewDesc != TargetDesc)
{
/*
* Store the new NewDesc as the new value of the Name, and set
* the Name's type to that of the value being stored in it.
* SourceDesc reference count is incremented by AttachObject.
*
* Note: This may change the type of the node if an explicit store
* has been performed such that the node/object type has been
* changed.
*/
Status = AcpiNsAttachObject (Node, NewDesc, NewDesc->Common.Type);
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Store %s into %s via Convert/Attach\n",
AcpiUtGetObjectTypeName (SourceDesc),
AcpiUtGetObjectTypeName (NewDesc)));
}
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Storing %s (%p) directly into node (%p) with no implicit conversion\n",
AcpiUtGetObjectTypeName (SourceDesc), SourceDesc, Node));
/* No conversions for all other types. Just attach the source object */
Status = AcpiNsAttachObject (Node, SourceDesc,
SourceDesc->Common.Type);
break;
}
return_ACPI_STATUS (Status);
}