NetBSD-5.0.2/sys/dist/acpica/dsobject.c
/******************************************************************************
*
* Module Name: dsobject - Dispatcher object management routines
* $Revision: 1.7 $
*
*****************************************************************************/
/******************************************************************************
*
* 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 __DSOBJECT_C__
#include "acpi.h"
#include "acparser.h"
#include "amlcode.h"
#include "acdispat.h"
#include "acnamesp.h"
#include "acinterp.h"
#define _COMPONENT ACPI_DISPATCHER
ACPI_MODULE_NAME ("dsobject")
/* Local prototypes */
static ACPI_STATUS
AcpiDsBuildInternalObject (
ACPI_WALK_STATE *WalkState,
ACPI_PARSE_OBJECT *Op,
ACPI_OPERAND_OBJECT **ObjDescPtr);
#ifndef ACPI_NO_METHOD_EXECUTION
/*******************************************************************************
*
* FUNCTION: AcpiDsBuildInternalObject
*
* PARAMETERS: WalkState - Current walk state
* Op - Parser object to be translated
* ObjDescPtr - Where the ACPI internal object is returned
*
* RETURN: Status
*
* DESCRIPTION: Translate a parser Op object to the equivalent namespace object
* Simple objects are any objects other than a package object!
*
******************************************************************************/
static ACPI_STATUS
AcpiDsBuildInternalObject (
ACPI_WALK_STATE *WalkState,
ACPI_PARSE_OBJECT *Op,
ACPI_OPERAND_OBJECT **ObjDescPtr)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (DsBuildInternalObject);
*ObjDescPtr = NULL;
if (Op->Common.AmlOpcode == AML_INT_NAMEPATH_OP)
{
/*
* This is a named object reference. If this name was
* previously looked up in the namespace, it was stored in this op.
* Otherwise, go ahead and look it up now
*/
if (!Op->Common.Node)
{
Status = AcpiNsLookup (WalkState->ScopeInfo,
Op->Common.Value.String,
ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL,
ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, &(Op->Common.Node)));
if (ACPI_FAILURE (Status))
{
/* Check if we are resolving a named reference within a package */
if ((Status == AE_NOT_FOUND) && (AcpiGbl_EnableInterpreterSlack) &&
((Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
(Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP)))
{
/*
* We didn't find the target and we are populating elements
* of a package - ignore if slack enabled. Some ASL code
* contains dangling invalid references in packages and
* expects that no exception will be issued. Leave the
* element as a null element. It cannot be used, but it
* can be overwritten by subsequent ASL code - this is
* typically the case.
*/
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Ignoring unresolved reference in package [%4.4s]\n",
WalkState->ScopeInfo->Scope.Node->Name.Ascii));
return_ACPI_STATUS (AE_OK);
}
else
{
ACPI_ERROR_NAMESPACE (Op->Common.Value.String, Status);
}
return_ACPI_STATUS (Status);
}
}
/* Special object resolution for elements of a package */
if ((Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
(Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP))
{
/*
* Attempt to resolve the node to a value before we insert it into
* the package. If this is a reference to a common data type,
* resolve it immediately. According to the ACPI spec, package
* elements can only be "data objects" or method references.
* Attempt to resolve to an Integer, Buffer, String or Package.
* If cannot, return the named reference (for things like Devices,
* Methods, etc.) Buffer Fields and Fields will resolve to simple
* objects (int/buf/str/pkg).
*
* NOTE: References to things like Devices, Methods, Mutexes, etc.
* will remain as named references. This behavior is not described
* in the ACPI spec, but it appears to be an oversight.
*/
ObjDesc = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Op->Common.Node);
Status = AcpiExResolveNodeToValue (
ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, &ObjDesc),
WalkState);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
switch (Op->Common.Node->Type)
{
/*
* For these types, we need the actual node, not the subobject.
* However, the subobject did not get an extra reference count above.
*
* TBD: should ExResolveNodeToValue be changed to fix this?
*/
case ACPI_TYPE_DEVICE:
case ACPI_TYPE_THERMAL:
AcpiUtAddReference (Op->Common.Node->Object);
/*lint -fallthrough */
/*
* For these types, we need the actual node, not the subobject.
* The subobject got an extra reference count in ExResolveNodeToValue.
*/
case ACPI_TYPE_MUTEX:
case ACPI_TYPE_METHOD:
case ACPI_TYPE_POWER:
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_EVENT:
case ACPI_TYPE_REGION:
/* We will create a reference object for these types below */
break;
default:
/*
* All other types - the node was resolved to an actual
* object, we are done.
*/
goto Exit;
}
}
}
/* Create and init a new internal ACPI object */
ObjDesc = AcpiUtCreateInternalObject (
(AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode))->ObjectType);
if (!ObjDesc)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
Status = AcpiDsInitObjectFromOp (WalkState, Op, Op->Common.AmlOpcode,
&ObjDesc);
if (ACPI_FAILURE (Status))
{
AcpiUtRemoveReference (ObjDesc);
return_ACPI_STATUS (Status);
}
Exit:
*ObjDescPtr = ObjDesc;
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiDsBuildInternalBufferObj
*
* PARAMETERS: WalkState - Current walk state
* Op - Parser object to be translated
* BufferLength - Length of the buffer
* ObjDescPtr - Where the ACPI internal object is returned
*
* RETURN: Status
*
* DESCRIPTION: Translate a parser Op package object to the equivalent
* namespace object
*
******************************************************************************/
ACPI_STATUS
AcpiDsBuildInternalBufferObj (
ACPI_WALK_STATE *WalkState,
ACPI_PARSE_OBJECT *Op,
UINT32 BufferLength,
ACPI_OPERAND_OBJECT **ObjDescPtr)
{
ACPI_PARSE_OBJECT *Arg;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_PARSE_OBJECT *ByteList;
UINT32 ByteListLength = 0;
ACPI_FUNCTION_TRACE (DsBuildInternalBufferObj);
/*
* If we are evaluating a Named buffer object "Name (xxxx, Buffer)".
* The buffer object already exists (from the NS node), otherwise it must
* be created.
*/
ObjDesc = *ObjDescPtr;
if (!ObjDesc)
{
/* Create a new buffer object */
ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER);
*ObjDescPtr = ObjDesc;
if (!ObjDesc)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
}
/*
* Second arg is the buffer data (optional) ByteList can be either
* individual bytes or a string initializer. In either case, a
* ByteList appears in the AML.
*/
Arg = Op->Common.Value.Arg; /* skip first arg */
ByteList = Arg->Named.Next;
if (ByteList)
{
if (ByteList->Common.AmlOpcode != AML_INT_BYTELIST_OP)
{
ACPI_ERROR ((AE_INFO,
"Expecting bytelist, got AML opcode %X in op %p",
ByteList->Common.AmlOpcode, ByteList));
AcpiUtRemoveReference (ObjDesc);
return (AE_TYPE);
}
ByteListLength = (UINT32) ByteList->Common.Value.Integer;
}
/*
* The buffer length (number of bytes) will be the larger of:
* 1) The specified buffer length and
* 2) The length of the initializer byte list
*/
ObjDesc->Buffer.Length = BufferLength;
if (ByteListLength > BufferLength)
{
ObjDesc->Buffer.Length = ByteListLength;
}
/* Allocate the buffer */
if (ObjDesc->Buffer.Length == 0)
{
ObjDesc->Buffer.Pointer = NULL;
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Buffer defined with zero length in AML, creating\n"));
}
else
{
ObjDesc->Buffer.Pointer = ACPI_ALLOCATE_ZEROED (
ObjDesc->Buffer.Length);
if (!ObjDesc->Buffer.Pointer)
{
AcpiUtDeleteObjectDesc (ObjDesc);
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Initialize buffer from the ByteList (if present) */
if (ByteList)
{
ACPI_MEMCPY (ObjDesc->Buffer.Pointer, ByteList->Named.Data,
ByteListLength);
}
}
ObjDesc->Buffer.Flags |= AOPOBJ_DATA_VALID;
Op->Common.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjDesc);
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiDsBuildInternalPackageObj
*
* PARAMETERS: WalkState - Current walk state
* Op - Parser object to be translated
* ElementCount - Number of elements in the package - this is
* the NumElements argument to Package()
* ObjDescPtr - Where the ACPI internal object is returned
*
* RETURN: Status
*
* DESCRIPTION: Translate a parser Op package object to the equivalent
* namespace object
*
* NOTE: The number of elements in the package will be always be the NumElements
* count, regardless of the number of elements in the package list. If
* NumElements is smaller, only that many package list elements are used.
* if NumElements is larger, the Package object is padded out with
* objects of type Uninitialized (as per ACPI spec.)
*
* Even though the ASL compilers do not allow NumElements to be smaller
* than the Package list length (for the fixed length package opcode), some
* BIOS code modifies the AML on the fly to adjust the NumElements, and
* this code compensates for that. This also provides compatibility with
* other AML interpreters.
*
******************************************************************************/
ACPI_STATUS
AcpiDsBuildInternalPackageObj (
ACPI_WALK_STATE *WalkState,
ACPI_PARSE_OBJECT *Op,
UINT32 ElementCount,
ACPI_OPERAND_OBJECT **ObjDescPtr)
{
ACPI_PARSE_OBJECT *Arg;
ACPI_PARSE_OBJECT *Parent;
ACPI_OPERAND_OBJECT *ObjDesc = NULL;
ACPI_STATUS Status = AE_OK;
ACPI_NATIVE_UINT i;
UINT16 Index;
UINT16 ReferenceCount;
ACPI_FUNCTION_TRACE (DsBuildInternalPackageObj);
/* Find the parent of a possibly nested package */
Parent = Op->Common.Parent;
while ((Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
(Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP))
{
Parent = Parent->Common.Parent;
}
/*
* If we are evaluating a Named package object "Name (xxxx, Package)",
* the package object already exists, otherwise it must be created.
*/
ObjDesc = *ObjDescPtr;
if (!ObjDesc)
{
ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_PACKAGE);
*ObjDescPtr = ObjDesc;
if (!ObjDesc)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
ObjDesc->Package.Node = Parent->Common.Node;
}
/*
* Allocate the element array (array of pointers to the individual
* objects) based on the NumElements parameter. Add an extra pointer slot
* so that the list is always null terminated.
*/
ObjDesc->Package.Elements = ACPI_ALLOCATE_ZEROED (
((ACPI_SIZE) ElementCount + 1) * sizeof (void *));
if (!ObjDesc->Package.Elements)
{
AcpiUtDeleteObjectDesc (ObjDesc);
return_ACPI_STATUS (AE_NO_MEMORY);
}
ObjDesc->Package.Count = ElementCount;
/*
* Initialize the elements of the package, up to the NumElements count.
* Package is automatically padded with uninitialized (NULL) elements
* if NumElements is greater than the package list length. Likewise,
* Package is truncated if NumElements is less than the list length.
*/
Arg = Op->Common.Value.Arg;
Arg = Arg->Common.Next;
for (i = 0; Arg && (i < ElementCount); i++)
{
if (Arg->Common.AmlOpcode == AML_INT_RETURN_VALUE_OP)
{
if (Arg->Common.Node->Type == ACPI_TYPE_METHOD)
{
/*
* A method reference "looks" to the parser to be a method
* invocation, so we special case it here
*/
Arg->Common.AmlOpcode = AML_INT_NAMEPATH_OP;
Status = AcpiDsBuildInternalObject (WalkState, Arg,
&ObjDesc->Package.Elements[i]);
}
else
{
/* This package element is already built, just get it */
ObjDesc->Package.Elements[i] =
ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Arg->Common.Node);
}
}
else
{
Status = AcpiDsBuildInternalObject (WalkState, Arg,
&ObjDesc->Package.Elements[i]);
}
if (*ObjDescPtr)
{
/* Existing package, get existing reference count */
ReferenceCount = (*ObjDescPtr)->Common.ReferenceCount;
if (ReferenceCount > 1)
{
/* Make new element ref count match original ref count */
for (Index = 0; Index < (ReferenceCount - 1); Index++)
{
AcpiUtAddReference ((ObjDesc->Package.Elements[i]));
}
}
}
Arg = Arg->Common.Next;
}
/* Check for match between NumElements and actual length of PackageList */
if (Arg)
{
/*
* NumElements was exhausted, but there are remaining elements in the
* PackageList.
*
* Note: technically, this is an error, from ACPI spec: "It is an error
* for NumElements to be less than the number of elements in the
* PackageList". However, for now, we just print an error message and
* no exception is returned.
*/
while (Arg)
{
/* Find out how many elements there really are */
i++;
Arg = Arg->Common.Next;
}
ACPI_ERROR ((AE_INFO,
"Package List length larger than NumElements count (%X), truncated\n",
ElementCount));
}
else if (i < ElementCount)
{
/*
* Arg list (elements) was exhausted, but we did not reach NumElements count.
* Note: this is not an error, the package is padded out with NULLs.
*/
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Package List length (%X) smaller than NumElements count (%X), padded with null elements\n",
(UINT32) i, ElementCount));
}
ObjDesc->Package.Flags |= AOPOBJ_DATA_VALID;
Op->Common.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjDesc);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiDsCreateNode
*
* PARAMETERS: WalkState - Current walk state
* Node - NS Node to be initialized
* Op - Parser object to be translated
*
* RETURN: Status
*
* DESCRIPTION: Create the object to be associated with a namespace node
*
******************************************************************************/
ACPI_STATUS
AcpiDsCreateNode (
ACPI_WALK_STATE *WalkState,
ACPI_NAMESPACE_NODE *Node,
ACPI_PARSE_OBJECT *Op)
{
ACPI_STATUS Status;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_FUNCTION_TRACE_PTR (DsCreateNode, Op);
/*
* Because of the execution pass through the non-control-method
* parts of the table, we can arrive here twice. Only init
* the named object node the first time through
*/
if (AcpiNsGetAttachedObject (Node))
{
return_ACPI_STATUS (AE_OK);
}
if (!Op->Common.Value.Arg)
{
/* No arguments, there is nothing to do */
return_ACPI_STATUS (AE_OK);
}
/* Build an internal object for the argument(s) */
Status = AcpiDsBuildInternalObject (WalkState, Op->Common.Value.Arg,
&ObjDesc);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Re-type the object according to its argument */
Node->Type = ACPI_GET_OBJECT_TYPE (ObjDesc);
/* Attach obj to node */
Status = AcpiNsAttachObject (Node, ObjDesc, Node->Type);
/* Remove local reference to the object */
AcpiUtRemoveReference (ObjDesc);
return_ACPI_STATUS (Status);
}
#endif /* ACPI_NO_METHOD_EXECUTION */
/*******************************************************************************
*
* FUNCTION: AcpiDsInitObjectFromOp
*
* PARAMETERS: WalkState - Current walk state
* Op - Parser op used to init the internal object
* Opcode - AML opcode associated with the object
* RetObjDesc - Namespace object to be initialized
*
* RETURN: Status
*
* DESCRIPTION: Initialize a namespace object from a parser Op and its
* associated arguments. The namespace object is a more compact
* representation of the Op and its arguments.
*
******************************************************************************/
ACPI_STATUS
AcpiDsInitObjectFromOp (
ACPI_WALK_STATE *WalkState,
ACPI_PARSE_OBJECT *Op,
UINT16 Opcode,
ACPI_OPERAND_OBJECT **RetObjDesc)
{
const ACPI_OPCODE_INFO *OpInfo;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (DsInitObjectFromOp);
ObjDesc = *RetObjDesc;
OpInfo = AcpiPsGetOpcodeInfo (Opcode);
if (OpInfo->Class == AML_CLASS_UNKNOWN)
{
/* Unknown opcode */
return_ACPI_STATUS (AE_TYPE);
}
/* Perform per-object initialization */
switch (ACPI_GET_OBJECT_TYPE (ObjDesc))
{
case ACPI_TYPE_BUFFER:
/*
* Defer evaluation of Buffer TermArg operand
*/
ObjDesc->Buffer.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE,
WalkState->Operands[0]);
ObjDesc->Buffer.AmlStart = Op->Named.Data;
ObjDesc->Buffer.AmlLength = Op->Named.Length;
break;
case ACPI_TYPE_PACKAGE:
/*
* Defer evaluation of Package TermArg operand
*/
ObjDesc->Package.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE,
WalkState->Operands[0]);
ObjDesc->Package.AmlStart = Op->Named.Data;
ObjDesc->Package.AmlLength = Op->Named.Length;
break;
case ACPI_TYPE_INTEGER:
switch (OpInfo->Type)
{
case AML_TYPE_CONSTANT:
/*
* Resolve AML Constants here - AND ONLY HERE!
* All constants are integers.
* We mark the integer with a flag that indicates that it started
* life as a constant -- so that stores to constants will perform
* as expected (noop). ZeroOp is used as a placeholder for optional
* target operands.
*/
ObjDesc->Common.Flags = AOPOBJ_AML_CONSTANT;
switch (Opcode)
{
case AML_ZERO_OP:
ObjDesc->Integer.Value = 0;
break;
case AML_ONE_OP:
ObjDesc->Integer.Value = 1;
break;
case AML_ONES_OP:
ObjDesc->Integer.Value = ACPI_INTEGER_MAX;
/* Truncate value if we are executing from a 32-bit ACPI table */
#ifndef ACPI_NO_METHOD_EXECUTION
AcpiExTruncateFor32bitTable (ObjDesc);
#endif
break;
case AML_REVISION_OP:
ObjDesc->Integer.Value = ACPI_CA_VERSION;
break;
default:
ACPI_ERROR ((AE_INFO,
"Unknown constant opcode %X", Opcode));
Status = AE_AML_OPERAND_TYPE;
break;
}
break;
case AML_TYPE_LITERAL:
ObjDesc->Integer.Value = Op->Common.Value.Integer;
#ifndef ACPI_NO_METHOD_EXECUTION
AcpiExTruncateFor32bitTable (ObjDesc);
#endif
break;
default:
ACPI_ERROR ((AE_INFO, "Unknown Integer type %X",
OpInfo->Type));
Status = AE_AML_OPERAND_TYPE;
break;
}
break;
case ACPI_TYPE_STRING:
ObjDesc->String.Pointer = Op->Common.Value.String;
ObjDesc->String.Length = (UINT32) ACPI_STRLEN (Op->Common.Value.String);
/*
* The string is contained in the ACPI table, don't ever try
* to delete it
*/
ObjDesc->Common.Flags |= AOPOBJ_STATIC_POINTER;
break;
case ACPI_TYPE_METHOD:
break;
case ACPI_TYPE_LOCAL_REFERENCE:
switch (OpInfo->Type)
{
case AML_TYPE_LOCAL_VARIABLE:
/* Split the opcode into a base opcode + offset */
ObjDesc->Reference.Opcode = AML_LOCAL_OP;
ObjDesc->Reference.Offset = Opcode - AML_LOCAL_OP;
#ifndef ACPI_NO_METHOD_EXECUTION
Status = AcpiDsMethodDataGetNode (AML_LOCAL_OP,
ObjDesc->Reference.Offset,
WalkState,
(ACPI_NAMESPACE_NODE **) &ObjDesc->Reference.Object);
#endif
break;
case AML_TYPE_METHOD_ARGUMENT:
/* Split the opcode into a base opcode + offset */
ObjDesc->Reference.Opcode = AML_ARG_OP;
ObjDesc->Reference.Offset = Opcode - AML_ARG_OP;
#ifndef ACPI_NO_METHOD_EXECUTION
Status = AcpiDsMethodDataGetNode (AML_ARG_OP,
ObjDesc->Reference.Offset,
WalkState,
(ACPI_NAMESPACE_NODE **) &ObjDesc->Reference.Object);
#endif
break;
default: /* Other literals, etc.. */
if (Op->Common.AmlOpcode == AML_INT_NAMEPATH_OP)
{
/* Node was saved in Op */
ObjDesc->Reference.Node = Op->Common.Node;
ObjDesc->Reference.Object = Op->Common.Node->Object;
}
ObjDesc->Reference.Opcode = Opcode;
break;
}
break;
default:
ACPI_ERROR ((AE_INFO, "Unimplemented data type: %X",
ACPI_GET_OBJECT_TYPE (ObjDesc)));
Status = AE_AML_OPERAND_TYPE;
break;
}
return_ACPI_STATUS (Status);
}