443 lines
15 KiB
C
443 lines
15 KiB
C
/******************************************************************************
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*
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* Module Name: uteval - Object evaluation
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*
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*****************************************************************************/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
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* All rights reserved.
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*
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* 2. License
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*
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* 2.1. This is your license from Intel Corp. under its intellectual property
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* rights. You may have additional license terms from the party that provided
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* you this software, covering your right to use that party's intellectual
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* property rights.
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*
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* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") an
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* irrevocable, perpetual, worldwide license under Intel's copyrights in the
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* base code distributed originally by Intel ("Original Intel Code") to copy,
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* make derivatives, distribute, use and display any portion of the Covered
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* Code in any form, with the right to sublicense such rights; and
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*
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* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (with the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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* license, and in no event shall the patent license extend to any additions
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* to or modifications of the Original Intel Code. No other license or right
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* is granted directly or by implication, estoppel or otherwise;
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*
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* The above copyright and patent license is granted only if the following
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* conditions are met:
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*
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* 3. Conditions
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*
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* 3.1. Redistribution of Source with Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification with rights to further distribute source must include
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* the above Copyright Notice, the above License, this list of Conditions,
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* and the following Disclaimer and Export Compliance provision. In addition,
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* Licensee must cause all Covered Code to which Licensee contributes to
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* contain a file documenting the changes Licensee made to create that Covered
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* Code and the date of any change. Licensee must include in that file the
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* documentation of any changes made by any predecessor Licensee. Licensee
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* must include a prominent statement that the modification is derived,
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* directly or indirectly, from Original Intel Code.
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*
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* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification without rights to further distribute source must
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* include the following Disclaimer and Export Compliance provision in the
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* documentation and/or other materials provided with distribution. In
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* addition, Licensee may not authorize further sublicense of source of any
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* portion of the Covered Code, and must include terms to the effect that the
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* license from Licensee to its licensee is limited to the intellectual
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* property embodied in the software Licensee provides to its licensee, and
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* not to intellectual property embodied in modifications its licensee may
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* make.
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*
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* 3.3. Redistribution of Executable. Redistribution in executable form of any
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* substantial portion of the Covered Code or modification must reproduce the
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* above Copyright Notice, and the following Disclaimer and Export Compliance
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* provision in the documentation and/or other materials provided with the
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* distribution.
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*
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* 3.4. Intel retains all right, title, and interest in and to the Original
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* Intel Code.
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*
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* 3.5. Neither the name Intel nor any other trademark owned or controlled by
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* Intel shall be used in advertising or otherwise to promote the sale, use or
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* other dealings in products derived from or relating to the Covered Code
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* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
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*
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* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
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* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
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* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
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* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
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* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
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* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
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* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
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* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
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* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
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* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
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* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
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* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
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* LIMITED REMEDY.
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*
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* 4.3. Licensee shall not export, either directly or indirectly, any of this
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* software or system incorporating such software without first obtaining any
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* required license or other approval from the U. S. Department of Commerce or
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* any other agency or department of the United States Government. In the
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* event Licensee exports any such software from the United States or
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* re-exports any such software from a foreign destination, Licensee shall
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* ensure that the distribution and export/re-export of the software is in
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* compliance with all laws, regulations, orders, or other restrictions of the
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* U.S. Export Administration Regulations. Licensee agrees that neither it nor
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* any of its subsidiaries will export/re-export any technical data, process,
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* software, or service, directly or indirectly, to any country for which the
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* United States government or any agency thereof requires an export license,
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* other governmental approval, or letter of assurance, without first obtaining
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* such license, approval or letter.
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*
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*****************************************************************************/
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#define __UTEVAL_C__
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#include "acpi.h"
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#include "accommon.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_UTILITIES
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ACPI_MODULE_NAME ("uteval")
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtEvaluateObject
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*
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* PARAMETERS: PrefixNode - Starting node
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* Path - Path to object from starting node
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* ExpectedReturnTypes - Bitmap of allowed return types
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* ReturnDesc - Where a return value is stored
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*
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* RETURN: Status
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*
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* DESCRIPTION: Evaluates a namespace object and verifies the type of the
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* return object. Common code that simplifies accessing objects
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* that have required return objects of fixed types.
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*
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* NOTE: Internal function, no parameter validation
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiUtEvaluateObject (
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ACPI_NAMESPACE_NODE *PrefixNode,
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char *Path,
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UINT32 ExpectedReturnBtypes,
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ACPI_OPERAND_OBJECT **ReturnDesc)
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{
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ACPI_EVALUATE_INFO *Info;
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ACPI_STATUS Status;
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UINT32 ReturnBtype;
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ACPI_FUNCTION_TRACE (UtEvaluateObject);
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/* Allocate the evaluation information block */
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Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
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if (!Info)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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Info->PrefixNode = PrefixNode;
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Info->Pathname = Path;
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/* Evaluate the object/method */
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Status = AcpiNsEvaluate (Info);
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if (ACPI_FAILURE (Status))
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{
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if (Status == AE_NOT_FOUND)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[%4.4s.%s] was not found\n",
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AcpiUtGetNodeName (PrefixNode), Path));
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}
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else
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{
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ACPI_ERROR_METHOD ("Method execution failed",
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PrefixNode, Path, Status);
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}
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goto Cleanup;
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}
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/* Did we get a return object? */
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if (!Info->ReturnObject)
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{
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if (ExpectedReturnBtypes)
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{
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ACPI_ERROR_METHOD ("No object was returned from",
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PrefixNode, Path, AE_NOT_EXIST);
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Status = AE_NOT_EXIST;
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}
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goto Cleanup;
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}
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/* Map the return object type to the bitmapped type */
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switch ((Info->ReturnObject)->Common.Type)
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{
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case ACPI_TYPE_INTEGER:
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ReturnBtype = ACPI_BTYPE_INTEGER;
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break;
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case ACPI_TYPE_BUFFER:
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ReturnBtype = ACPI_BTYPE_BUFFER;
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break;
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case ACPI_TYPE_STRING:
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ReturnBtype = ACPI_BTYPE_STRING;
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break;
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case ACPI_TYPE_PACKAGE:
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ReturnBtype = ACPI_BTYPE_PACKAGE;
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break;
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default:
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ReturnBtype = 0;
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break;
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}
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if ((AcpiGbl_EnableInterpreterSlack) &&
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(!ExpectedReturnBtypes))
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{
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/*
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* We received a return object, but one was not expected. This can
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* happen frequently if the "implicit return" feature is enabled.
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* Just delete the return object and return AE_OK.
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*/
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AcpiUtRemoveReference (Info->ReturnObject);
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goto Cleanup;
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}
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/* Is the return object one of the expected types? */
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if (!(ExpectedReturnBtypes & ReturnBtype))
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{
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ACPI_ERROR_METHOD ("Return object type is incorrect",
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PrefixNode, Path, AE_TYPE);
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ACPI_ERROR ((AE_INFO,
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"Type returned from %s was incorrect: %s, expected Btypes: 0x%X",
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Path, AcpiUtGetObjectTypeName (Info->ReturnObject),
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ExpectedReturnBtypes));
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/* On error exit, we must delete the return object */
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AcpiUtRemoveReference (Info->ReturnObject);
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Status = AE_TYPE;
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goto Cleanup;
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}
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/* Object type is OK, return it */
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*ReturnDesc = Info->ReturnObject;
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Cleanup:
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ACPI_FREE (Info);
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtEvaluateNumericObject
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*
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* PARAMETERS: ObjectName - Object name to be evaluated
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* DeviceNode - Node for the device
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* Value - Where the value is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Evaluates a numeric namespace object for a selected device
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* and stores result in *Value.
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*
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* NOTE: Internal function, no parameter validation
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiUtEvaluateNumericObject (
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char *ObjectName,
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ACPI_NAMESPACE_NODE *DeviceNode,
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UINT64 *Value)
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{
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (UtEvaluateNumericObject);
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Status = AcpiUtEvaluateObject (DeviceNode, ObjectName,
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ACPI_BTYPE_INTEGER, &ObjDesc);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/* Get the returned Integer */
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*Value = ObjDesc->Integer.Value;
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/* On exit, we must delete the return object */
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AcpiUtRemoveReference (ObjDesc);
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtExecute_STA
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*
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* PARAMETERS: DeviceNode - Node for the device
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* Flags - Where the status flags are returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Executes _STA for selected device and stores results in
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* *Flags.
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*
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* NOTE: Internal function, no parameter validation
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiUtExecute_STA (
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ACPI_NAMESPACE_NODE *DeviceNode,
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UINT32 *Flags)
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{
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (UtExecute_STA);
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Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__STA,
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ACPI_BTYPE_INTEGER, &ObjDesc);
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if (ACPI_FAILURE (Status))
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{
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if (AE_NOT_FOUND == Status)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
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"_STA on %4.4s was not found, assuming device is present\n",
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AcpiUtGetNodeName (DeviceNode)));
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*Flags = ACPI_UINT32_MAX;
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Status = AE_OK;
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}
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return_ACPI_STATUS (Status);
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}
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/* Extract the status flags */
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*Flags = (UINT32) ObjDesc->Integer.Value;
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/* On exit, we must delete the return object */
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AcpiUtRemoveReference (ObjDesc);
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtExecutePowerMethods
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*
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* PARAMETERS: DeviceNode - Node for the device
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* MethodNames - Array of power method names
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* MethodCount - Number of methods to execute
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* OutValues - Where the power method values are returned
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*
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* RETURN: Status, OutValues
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*
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* DESCRIPTION: Executes the specified power methods for the device and returns
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* the result(s).
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*
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* NOTE: Internal function, no parameter validation
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiUtExecutePowerMethods (
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ACPI_NAMESPACE_NODE *DeviceNode,
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const char **MethodNames,
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UINT8 MethodCount,
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UINT8 *OutValues)
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{
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_STATUS Status;
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ACPI_STATUS FinalStatus = AE_NOT_FOUND;
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UINT32 i;
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ACPI_FUNCTION_TRACE (UtExecutePowerMethods);
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for (i = 0; i < MethodCount; i++)
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{
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/*
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* Execute the power method (_SxD or _SxW). The only allowable
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* return type is an Integer.
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*/
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Status = AcpiUtEvaluateObject (DeviceNode,
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ACPI_CAST_PTR (char, MethodNames[i]),
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ACPI_BTYPE_INTEGER, &ObjDesc);
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if (ACPI_SUCCESS (Status))
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{
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OutValues[i] = (UINT8) ObjDesc->Integer.Value;
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/* Delete the return object */
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AcpiUtRemoveReference (ObjDesc);
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FinalStatus = AE_OK; /* At least one value is valid */
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continue;
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}
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OutValues[i] = ACPI_UINT8_MAX;
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if (Status == AE_NOT_FOUND)
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{
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continue; /* Ignore if not found */
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Failed %s on Device %4.4s, %s\n",
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ACPI_CAST_PTR (char, MethodNames[i]),
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AcpiUtGetNodeName (DeviceNode), AcpiFormatException (Status)));
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}
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return_ACPI_STATUS (FinalStatus);
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}
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