NetBSD-5.0.2/sys/dist/acpica/uteval.c
/******************************************************************************
*
* Module Name: uteval - Object evaluation
* $Revision: 1.5 $
*
*****************************************************************************/
/******************************************************************************
*
* 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 __UTEVAL_C__
#include "acpi.h"
#include "acnamesp.h"
#include "acinterp.h"
#define _COMPONENT ACPI_UTILITIES
ACPI_MODULE_NAME ("uteval")
/* Local prototypes */
static void
AcpiUtCopyIdString (
char *Destination,
char *Source,
ACPI_SIZE MaxLength);
static ACPI_STATUS
AcpiUtTranslateOneCid (
ACPI_OPERAND_OBJECT *ObjDesc,
ACPI_COMPATIBLE_ID *OneCid);
/*
* Strings supported by the _OSI predefined (internal) method.
*/
static const char *AcpiInterfacesSupported[] =
{
/* Operating System Vendor Strings */
"Linux",
"Windows 2000", /* Windows 2000 */
"Windows 2001", /* Windows XP */
"Windows 2001 SP1", /* Windows XP SP1 */
"Windows 2001 SP2", /* Windows XP SP2 */
"Windows 2001.1", /* Windows Server 2003 */
"Windows 2001.1 SP1", /* Windows Server 2003 SP1 - Added 03/2006 */
"Windows 2006", /* Windows Vista - Added 03/2006 */
/* Feature Group Strings */
"Extended Address Space Descriptor"
/*
* All "optional" feature group strings (features that are implemented
* by the host) should be implemented in the host version of
* AcpiOsValidateInterface and should not be added here.
*/
};
/*******************************************************************************
*
* FUNCTION: AcpiUtOsiImplementation
*
* PARAMETERS: WalkState - Current walk state
*
* RETURN: Status
*
* DESCRIPTION: Implementation of the _OSI predefined control method
*
******************************************************************************/
ACPI_STATUS
AcpiUtOsiImplementation (
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status;
ACPI_OPERAND_OBJECT *StringDesc;
ACPI_OPERAND_OBJECT *ReturnDesc;
ACPI_NATIVE_UINT i;
ACPI_FUNCTION_TRACE (UtOsiImplementation);
/* Validate the string input argument */
StringDesc = WalkState->Arguments[0].Object;
if (!StringDesc || (StringDesc->Common.Type != ACPI_TYPE_STRING))
{
return_ACPI_STATUS (AE_TYPE);
}
/* Create a return object */
ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
if (!ReturnDesc)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Default return value is SUPPORTED */
ReturnDesc->Integer.Value = ACPI_UINT32_MAX;
WalkState->ReturnDesc = ReturnDesc;
/* Compare input string to static table of supported interfaces */
for (i = 0; i < ACPI_ARRAY_LENGTH (AcpiInterfacesSupported); i++)
{
if (!ACPI_STRCMP (StringDesc->String.Pointer, AcpiInterfacesSupported[i]))
{
/* The interface is supported */
return_ACPI_STATUS (AE_CTRL_TERMINATE);
}
}
/*
* Did not match the string in the static table, call the host OSL to
* check for a match with one of the optional strings (such as
* "Module Device", "3.0 Thermal Model", etc.)
*/
Status = AcpiOsValidateInterface (StringDesc->String.Pointer);
if (ACPI_SUCCESS (Status))
{
/* The interface is supported */
return_ACPI_STATUS (AE_CTRL_TERMINATE);
}
/* The interface is not supported */
ReturnDesc->Integer.Value = 0;
return_ACPI_STATUS (AE_CTRL_TERMINATE);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtEvaluateObject
*
* PARAMETERS: PrefixNode - Starting node
* Path - Path to object from starting node
* ExpectedReturnTypes - Bitmap of allowed return types
* ReturnDesc - Where a return value is stored
*
* RETURN: Status
*
* DESCRIPTION: Evaluates a namespace object and verifies the type of the
* return object. Common code that simplifies accessing objects
* that have required return objects of fixed types.
*
* NOTE: Internal function, no parameter validation
*
******************************************************************************/
ACPI_STATUS
AcpiUtEvaluateObject (
ACPI_NAMESPACE_NODE *PrefixNode,
const char *Path,
UINT32 ExpectedReturnBtypes,
ACPI_OPERAND_OBJECT **ReturnDesc)
{
ACPI_EVALUATE_INFO *Info;
ACPI_STATUS Status;
UINT32 ReturnBtype;
ACPI_FUNCTION_TRACE (UtEvaluateObject);
/* Allocate the evaluation information block */
Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
if (!Info)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
Info->PrefixNode = PrefixNode;
Info->Pathname = Path;
Info->ParameterType = ACPI_PARAM_ARGS;
/* Evaluate the object/method */
Status = AcpiNsEvaluate (Info);
if (ACPI_FAILURE (Status))
{
if (Status == AE_NOT_FOUND)
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[%4.4s.%s] was not found\n",
AcpiUtGetNodeName (PrefixNode), Path));
}
else
{
ACPI_ERROR_METHOD ("Method execution failed",
PrefixNode, Path, Status);
}
goto Cleanup;
}
/* Did we get a return object? */
if (!Info->ReturnObject)
{
if (ExpectedReturnBtypes)
{
ACPI_ERROR_METHOD ("No object was returned from",
PrefixNode, Path, AE_NOT_EXIST);
Status = AE_NOT_EXIST;
}
goto Cleanup;
}
/* Map the return object type to the bitmapped type */
switch (ACPI_GET_OBJECT_TYPE (Info->ReturnObject))
{
case ACPI_TYPE_INTEGER:
ReturnBtype = ACPI_BTYPE_INTEGER;
break;
case ACPI_TYPE_BUFFER:
ReturnBtype = ACPI_BTYPE_BUFFER;
break;
case ACPI_TYPE_STRING:
ReturnBtype = ACPI_BTYPE_STRING;
break;
case ACPI_TYPE_PACKAGE:
ReturnBtype = ACPI_BTYPE_PACKAGE;
break;
default:
ReturnBtype = 0;
break;
}
if ((AcpiGbl_EnableInterpreterSlack) &&
(!ExpectedReturnBtypes))
{
/*
* We received a return object, but one was not expected. This can
* happen frequently if the "implicit return" feature is enabled.
* Just delete the return object and return AE_OK.
*/
AcpiUtRemoveReference (Info->ReturnObject);
goto Cleanup;
}
/* Is the return object one of the expected types? */
if (!(ExpectedReturnBtypes & ReturnBtype))
{
ACPI_ERROR_METHOD ("Return object type is incorrect",
PrefixNode, Path, AE_TYPE);
ACPI_ERROR ((AE_INFO,
"Type returned from %s was incorrect: %s, expected Btypes: %X",
Path, AcpiUtGetObjectTypeName (Info->ReturnObject),
ExpectedReturnBtypes));
/* On error exit, we must delete the return object */
AcpiUtRemoveReference (Info->ReturnObject);
Status = AE_TYPE;
goto Cleanup;
}
/* Object type is OK, return it */
*ReturnDesc = Info->ReturnObject;
Cleanup:
ACPI_FREE (Info);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtEvaluateNumericObject
*
* PARAMETERS: ObjectName - Object name to be evaluated
* DeviceNode - Node for the device
* Address - Where the value is returned
*
* RETURN: Status
*
* DESCRIPTION: Evaluates a numeric namespace object for a selected device
* and stores result in *Address.
*
* NOTE: Internal function, no parameter validation
*
******************************************************************************/
ACPI_STATUS
AcpiUtEvaluateNumericObject (
const char *ObjectName,
ACPI_NAMESPACE_NODE *DeviceNode,
ACPI_INTEGER *Address)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (UtEvaluateNumericObject);
Status = AcpiUtEvaluateObject (DeviceNode, ObjectName,
ACPI_BTYPE_INTEGER, &ObjDesc);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Get the returned Integer */
*Address = ObjDesc->Integer.Value;
/* On exit, we must delete the return object */
AcpiUtRemoveReference (ObjDesc);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtCopyIdString
*
* PARAMETERS: Destination - Where to copy the string
* Source - Source string
* MaxLength - Length of the destination buffer
*
* RETURN: None
*
* DESCRIPTION: Copies an ID string for the _HID, _CID, and _UID methods.
* Performs removal of a leading asterisk if present -- workaround
* for a known issue on a bunch of machines.
*
******************************************************************************/
static void
AcpiUtCopyIdString (
char *Destination,
char *Source,
ACPI_SIZE MaxLength)
{
/*
* Workaround for ID strings that have a leading asterisk. This construct
* is not allowed by the ACPI specification (ID strings must be
* alphanumeric), but enough existing machines have this embedded in their
* ID strings that the following code is useful.
*/
if (*Source == '*')
{
Source++;
}
/* Do the actual copy */
ACPI_STRNCPY (Destination, Source, MaxLength);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtExecute_HID
*
* PARAMETERS: DeviceNode - Node for the device
* Hid - Where the HID is returned
*
* RETURN: Status
*
* DESCRIPTION: Executes the _HID control method that returns the hardware
* ID of the device.
*
* NOTE: Internal function, no parameter validation
*
******************************************************************************/
ACPI_STATUS
AcpiUtExecute_HID (
ACPI_NAMESPACE_NODE *DeviceNode,
ACPI_DEVICE_ID *Hid)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (UtExecute_HID);
Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__HID,
ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING, &ObjDesc);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
if (ACPI_GET_OBJECT_TYPE (ObjDesc) == ACPI_TYPE_INTEGER)
{
/* Convert the Numeric HID to string */
AcpiExEisaIdToString ((UINT32) ObjDesc->Integer.Value, Hid->Value);
}
else
{
/* Copy the String HID from the returned object */
AcpiUtCopyIdString (Hid->Value, ObjDesc->String.Pointer,
sizeof (Hid->Value));
}
/* On exit, we must delete the return object */
AcpiUtRemoveReference (ObjDesc);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtTranslateOneCid
*
* PARAMETERS: ObjDesc - _CID object, must be integer or string
* OneCid - Where the CID string is returned
*
* RETURN: Status
*
* DESCRIPTION: Return a numeric or string _CID value as a string.
* (Compatible ID)
*
* NOTE: Assumes a maximum _CID string length of
* ACPI_MAX_CID_LENGTH.
*
******************************************************************************/
static ACPI_STATUS
AcpiUtTranslateOneCid (
ACPI_OPERAND_OBJECT *ObjDesc,
ACPI_COMPATIBLE_ID *OneCid)
{
switch (ACPI_GET_OBJECT_TYPE (ObjDesc))
{
case ACPI_TYPE_INTEGER:
/* Convert the Numeric CID to string */
AcpiExEisaIdToString ((UINT32) ObjDesc->Integer.Value, OneCid->Value);
return (AE_OK);
case ACPI_TYPE_STRING:
if (ObjDesc->String.Length > ACPI_MAX_CID_LENGTH)
{
return (AE_AML_STRING_LIMIT);
}
/* Copy the String CID from the returned object */
AcpiUtCopyIdString (OneCid->Value, ObjDesc->String.Pointer,
ACPI_MAX_CID_LENGTH);
return (AE_OK);
default:
return (AE_TYPE);
}
}
/*******************************************************************************
*
* FUNCTION: AcpiUtExecute_CID
*
* PARAMETERS: DeviceNode - Node for the device
* ReturnCidList - Where the CID list is returned
*
* RETURN: Status
*
* DESCRIPTION: Executes the _CID control method that returns one or more
* compatible hardware IDs for the device.
*
* NOTE: Internal function, no parameter validation
*
******************************************************************************/
ACPI_STATUS
AcpiUtExecute_CID (
ACPI_NAMESPACE_NODE *DeviceNode,
ACPI_COMPATIBLE_ID_LIST **ReturnCidList)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_STATUS Status;
UINT32 Count;
UINT32 Size;
ACPI_COMPATIBLE_ID_LIST *CidList;
ACPI_NATIVE_UINT i;
ACPI_FUNCTION_TRACE (UtExecute_CID);
/* Evaluate the _CID method for this device */
Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__CID,
ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING | ACPI_BTYPE_PACKAGE,
&ObjDesc);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Get the number of _CIDs returned */
Count = 1;
if (ACPI_GET_OBJECT_TYPE (ObjDesc) == ACPI_TYPE_PACKAGE)
{
Count = ObjDesc->Package.Count;
}
/* Allocate a worst-case buffer for the _CIDs */
Size = (((Count - 1) * sizeof (ACPI_COMPATIBLE_ID)) +
sizeof (ACPI_COMPATIBLE_ID_LIST));
CidList = ACPI_ALLOCATE_ZEROED ((ACPI_SIZE) Size);
if (!CidList)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Init CID list */
CidList->Count = Count;
CidList->Size = Size;
/*
* A _CID can return either a single compatible ID or a package of
* compatible IDs. Each compatible ID can be one of the following:
* 1) Integer (32 bit compressed EISA ID) or
* 2) String (PCI ID format, e.g. "PCI\VEN_vvvv&DEV_dddd&SUBSYS_ssssssss")
*/
/* The _CID object can be either a single CID or a package (list) of CIDs */
if (ACPI_GET_OBJECT_TYPE (ObjDesc) == ACPI_TYPE_PACKAGE)
{
/* Translate each package element */
for (i = 0; i < Count; i++)
{
Status = AcpiUtTranslateOneCid (ObjDesc->Package.Elements[i],
&CidList->Id[i]);
if (ACPI_FAILURE (Status))
{
break;
}
}
}
else
{
/* Only one CID, translate to a string */
Status = AcpiUtTranslateOneCid (ObjDesc, CidList->Id);
}
/* Cleanup on error */
if (ACPI_FAILURE (Status))
{
ACPI_FREE (CidList);
}
else
{
*ReturnCidList = CidList;
}
/* On exit, we must delete the _CID return object */
AcpiUtRemoveReference (ObjDesc);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtExecute_UID
*
* PARAMETERS: DeviceNode - Node for the device
* Uid - Where the UID is returned
*
* RETURN: Status
*
* DESCRIPTION: Executes the _UID control method that returns the hardware
* ID of the device.
*
* NOTE: Internal function, no parameter validation
*
******************************************************************************/
ACPI_STATUS
AcpiUtExecute_UID (
ACPI_NAMESPACE_NODE *DeviceNode,
ACPI_DEVICE_ID *Uid)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (UtExecute_UID);
Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__UID,
ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING, &ObjDesc);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
if (ACPI_GET_OBJECT_TYPE (ObjDesc) == ACPI_TYPE_INTEGER)
{
/* Convert the Numeric UID to string */
AcpiExUnsignedIntegerToString (ObjDesc->Integer.Value, Uid->Value);
}
else
{
/* Copy the String UID from the returned object */
AcpiUtCopyIdString (Uid->Value, ObjDesc->String.Pointer,
sizeof (Uid->Value));
}
/* On exit, we must delete the return object */
AcpiUtRemoveReference (ObjDesc);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtExecute_STA
*
* PARAMETERS: DeviceNode - Node for the device
* Flags - Where the status flags are returned
*
* RETURN: Status
*
* DESCRIPTION: Executes _STA for selected device and stores results in
* *Flags.
*
* NOTE: Internal function, no parameter validation
*
******************************************************************************/
ACPI_STATUS
AcpiUtExecute_STA (
ACPI_NAMESPACE_NODE *DeviceNode,
UINT32 *Flags)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (UtExecute_STA);
Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__STA,
ACPI_BTYPE_INTEGER, &ObjDesc);
if (ACPI_FAILURE (Status))
{
if (AE_NOT_FOUND == Status)
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"_STA on %4.4s was not found, assuming device is present\n",
AcpiUtGetNodeName (DeviceNode)));
*Flags = ACPI_UINT32_MAX;
Status = AE_OK;
}
return_ACPI_STATUS (Status);
}
/* Extract the status flags */
*Flags = (UINT32) ObjDesc->Integer.Value;
/* On exit, we must delete the return object */
AcpiUtRemoveReference (ObjDesc);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtExecute_Sxds
*
* PARAMETERS: DeviceNode - Node for the device
* Flags - Where the status flags are returned
*
* RETURN: Status
*
* DESCRIPTION: Executes _STA for selected device and stores results in
* *Flags.
*
* NOTE: Internal function, no parameter validation
*
******************************************************************************/
ACPI_STATUS
AcpiUtExecute_Sxds (
ACPI_NAMESPACE_NODE *DeviceNode,
UINT8 *Highest)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_STATUS Status;
UINT32 i;
ACPI_FUNCTION_TRACE (UtExecute_Sxds);
for (i = 0; i < 4; i++)
{
Highest[i] = 0xFF;
Status = AcpiUtEvaluateObject (DeviceNode,
ACPI_CAST_CONST_PTR (char, AcpiGbl_HighestDstateNames[i]),
ACPI_BTYPE_INTEGER, &ObjDesc);
if (ACPI_FAILURE (Status))
{
if (Status != AE_NOT_FOUND)
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"%s on Device %4.4s, %s\n",
ACPI_CAST_CONST_PTR (char, AcpiGbl_HighestDstateNames[i]),
AcpiUtGetNodeName (DeviceNode),
AcpiFormatException (Status)));
return_ACPI_STATUS (Status);
}
}
else
{
/* Extract the Dstate value */
Highest[i] = (UINT8) ObjDesc->Integer.Value;
/* Delete the return object */
AcpiUtRemoveReference (ObjDesc);
}
}
return_ACPI_STATUS (AE_OK);
}