874 lines
27 KiB
C
874 lines
27 KiB
C
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/******************************************************************************
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*
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* Module Name: exmisc - ACPI AML (p-code) execution - specific opcodes
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* $Revision: 1.144 $
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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 - 2007, 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 __EXMISC_C__
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#include <contrib/dev/acpica/acpi.h>
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#include <contrib/dev/acpica/acinterp.h>
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#include <contrib/dev/acpica/amlcode.h>
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#include <contrib/dev/acpica/amlresrc.h>
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME ("exmisc")
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/*******************************************************************************
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*
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* FUNCTION: AcpiExGetObjectReference
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*
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* PARAMETERS: ObjDesc - Create a reference to this object
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* ReturnDesc - Where to store the reference
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* WalkState - Current state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Obtain and return a "reference" to the target object
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* Common code for the RefOfOp and the CondRefOfOp.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExGetObjectReference (
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ACPI_OPERAND_OBJECT *ObjDesc,
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ACPI_OPERAND_OBJECT **ReturnDesc,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_OPERAND_OBJECT *ReferenceObj;
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ACPI_OPERAND_OBJECT *ReferencedObj;
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ACPI_FUNCTION_TRACE_PTR (ExGetObjectReference, ObjDesc);
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*ReturnDesc = NULL;
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switch (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc))
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{
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case ACPI_DESC_TYPE_OPERAND:
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if (ACPI_GET_OBJECT_TYPE (ObjDesc) != ACPI_TYPE_LOCAL_REFERENCE)
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{
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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/*
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* Must be a reference to a Local or Arg
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*/
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switch (ObjDesc->Reference.Opcode)
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{
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case AML_LOCAL_OP:
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case AML_ARG_OP:
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case AML_DEBUG_OP:
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/* The referenced object is the pseudo-node for the local/arg */
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ReferencedObj = ObjDesc->Reference.Object;
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break;
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default:
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ACPI_ERROR ((AE_INFO, "Unknown Reference opcode %X",
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ObjDesc->Reference.Opcode));
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return_ACPI_STATUS (AE_AML_INTERNAL);
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}
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break;
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case ACPI_DESC_TYPE_NAMED:
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/*
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* A named reference that has already been resolved to a Node
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*/
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ReferencedObj = ObjDesc;
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break;
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default:
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ACPI_ERROR ((AE_INFO, "Invalid descriptor type %X",
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ACPI_GET_DESCRIPTOR_TYPE (ObjDesc)));
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return_ACPI_STATUS (AE_TYPE);
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}
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/* Create a new reference object */
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ReferenceObj = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_REFERENCE);
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if (!ReferenceObj)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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ReferenceObj->Reference.Opcode = AML_REF_OF_OP;
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ReferenceObj->Reference.Object = ReferencedObj;
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*ReturnDesc = ReferenceObj;
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
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"Object %p Type [%s], returning Reference %p\n",
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ObjDesc, AcpiUtGetObjectTypeName (ObjDesc), *ReturnDesc));
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExConcatTemplate
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*
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* PARAMETERS: Operand0 - First source object
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* Operand1 - Second source object
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* ActualReturnDesc - Where to place the return object
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* WalkState - Current walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Concatenate two resource templates
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExConcatTemplate (
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ACPI_OPERAND_OBJECT *Operand0,
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ACPI_OPERAND_OBJECT *Operand1,
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ACPI_OPERAND_OBJECT **ActualReturnDesc,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_STATUS Status;
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ACPI_OPERAND_OBJECT *ReturnDesc;
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UINT8 *NewBuf;
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UINT8 *EndTag;
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ACPI_SIZE Length0;
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ACPI_SIZE Length1;
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ACPI_SIZE NewLength;
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ACPI_FUNCTION_TRACE (ExConcatTemplate);
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/*
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* Find the EndTag descriptor in each resource template.
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* Note1: returned pointers point TO the EndTag, not past it.
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* Note2: zero-length buffers are allowed; treated like one EndTag
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*/
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/* Get the length of the first resource template */
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Status = AcpiUtGetResourceEndTag (Operand0, &EndTag);
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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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Length0 = ACPI_PTR_DIFF (EndTag, Operand0->Buffer.Pointer);
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/* Get the length of the second resource template */
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Status = AcpiUtGetResourceEndTag (Operand1, &EndTag);
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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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Length1 = ACPI_PTR_DIFF (EndTag, Operand1->Buffer.Pointer);
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/* Combine both lengths, minimum size will be 2 for EndTag */
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NewLength = Length0 + Length1 + sizeof (AML_RESOURCE_END_TAG);
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/* Create a new buffer object for the result (with one EndTag) */
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ReturnDesc = AcpiUtCreateBufferObject (NewLength);
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if (!ReturnDesc)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/*
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* Copy the templates to the new buffer, 0 first, then 1 follows. One
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* EndTag descriptor is copied from Operand1.
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*/
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NewBuf = ReturnDesc->Buffer.Pointer;
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ACPI_MEMCPY (NewBuf, Operand0->Buffer.Pointer, Length0);
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ACPI_MEMCPY (NewBuf + Length0, Operand1->Buffer.Pointer, Length1);
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/* Insert EndTag and set the checksum to zero, means "ignore checksum" */
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NewBuf[NewLength - 1] = 0;
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NewBuf[NewLength - 2] = ACPI_RESOURCE_NAME_END_TAG | 1;
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/* Return the completed resource template */
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*ActualReturnDesc = ReturnDesc;
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiExDoConcatenate
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*
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* PARAMETERS: Operand0 - First source object
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* Operand1 - Second source object
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* ActualReturnDesc - Where to place the return object
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* WalkState - Current walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Concatenate two objects OF THE SAME TYPE.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExDoConcatenate (
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ACPI_OPERAND_OBJECT *Operand0,
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ACPI_OPERAND_OBJECT *Operand1,
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ACPI_OPERAND_OBJECT **ActualReturnDesc,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_OPERAND_OBJECT *LocalOperand1 = Operand1;
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ACPI_OPERAND_OBJECT *ReturnDesc;
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char *NewBuf;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (ExDoConcatenate);
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/*
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* Convert the second operand if necessary. The first operand
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* determines the type of the second operand, (See the Data Types
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* section of the ACPI specification.) Both object types are
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* guaranteed to be either Integer/String/Buffer by the operand
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* resolution mechanism.
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*/
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switch (ACPI_GET_OBJECT_TYPE (Operand0))
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{
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case ACPI_TYPE_INTEGER:
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Status = AcpiExConvertToInteger (Operand1, &LocalOperand1, 16);
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break;
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case ACPI_TYPE_STRING:
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Status = AcpiExConvertToString (Operand1, &LocalOperand1,
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ACPI_IMPLICIT_CONVERT_HEX);
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break;
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case ACPI_TYPE_BUFFER:
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Status = AcpiExConvertToBuffer (Operand1, &LocalOperand1);
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break;
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default:
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ACPI_ERROR ((AE_INFO, "Invalid object type: %X",
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ACPI_GET_OBJECT_TYPE (Operand0)));
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Status = AE_AML_INTERNAL;
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}
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if (ACPI_FAILURE (Status))
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{
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goto Cleanup;
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}
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/*
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* Both operands are now known to be the same object type
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* (Both are Integer, String, or Buffer), and we can now perform the
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* concatenation.
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*/
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/*
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* There are three cases to handle:
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*
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* 1) Two Integers concatenated to produce a new Buffer
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* 2) Two Strings concatenated to produce a new String
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* 3) Two Buffers concatenated to produce a new Buffer
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*/
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switch (ACPI_GET_OBJECT_TYPE (Operand0))
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{
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case ACPI_TYPE_INTEGER:
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/* Result of two Integers is a Buffer */
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/* Need enough buffer space for two integers */
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ReturnDesc = AcpiUtCreateBufferObject ((ACPI_SIZE)
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ACPI_MUL_2 (AcpiGbl_IntegerByteWidth));
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if (!ReturnDesc)
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{
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Status = AE_NO_MEMORY;
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goto Cleanup;
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}
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NewBuf = (char *) ReturnDesc->Buffer.Pointer;
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/* Copy the first integer, LSB first */
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ACPI_MEMCPY (NewBuf, &Operand0->Integer.Value,
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AcpiGbl_IntegerByteWidth);
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/* Copy the second integer (LSB first) after the first */
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ACPI_MEMCPY (NewBuf + AcpiGbl_IntegerByteWidth,
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&LocalOperand1->Integer.Value,
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AcpiGbl_IntegerByteWidth);
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break;
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case ACPI_TYPE_STRING:
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/* Result of two Strings is a String */
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ReturnDesc = AcpiUtCreateStringObject ((ACPI_SIZE)
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(Operand0->String.Length +
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LocalOperand1->String.Length));
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if (!ReturnDesc)
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{
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Status = AE_NO_MEMORY;
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goto Cleanup;
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}
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NewBuf = ReturnDesc->String.Pointer;
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/* Concatenate the strings */
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ACPI_STRCPY (NewBuf, Operand0->String.Pointer);
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ACPI_STRCPY (NewBuf + Operand0->String.Length,
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LocalOperand1->String.Pointer);
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break;
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case ACPI_TYPE_BUFFER:
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/* Result of two Buffers is a Buffer */
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ReturnDesc = AcpiUtCreateBufferObject ((ACPI_SIZE)
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(Operand0->Buffer.Length +
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LocalOperand1->Buffer.Length));
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if (!ReturnDesc)
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{
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Status = AE_NO_MEMORY;
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goto Cleanup;
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}
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NewBuf = (char *) ReturnDesc->Buffer.Pointer;
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/* Concatenate the buffers */
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ACPI_MEMCPY (NewBuf, Operand0->Buffer.Pointer,
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Operand0->Buffer.Length);
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ACPI_MEMCPY (NewBuf + Operand0->Buffer.Length,
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LocalOperand1->Buffer.Pointer,
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LocalOperand1->Buffer.Length);
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break;
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default:
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/* Invalid object type, should not happen here */
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ACPI_ERROR ((AE_INFO, "Invalid object type: %X",
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ACPI_GET_OBJECT_TYPE (Operand0)));
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Status =AE_AML_INTERNAL;
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goto Cleanup;
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}
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*ActualReturnDesc = ReturnDesc;
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Cleanup:
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if (LocalOperand1 != Operand1)
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{
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AcpiUtRemoveReference (LocalOperand1);
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}
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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: AcpiExDoMathOp
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*
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* PARAMETERS: Opcode - AML opcode
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* Integer0 - Integer operand #0
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* Integer1 - Integer operand #1
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*
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* RETURN: Integer result of the operation
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*
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* DESCRIPTION: Execute a math AML opcode. The purpose of having all of the
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* math functions here is to prevent a lot of pointer dereferencing
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* to obtain the operands.
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*
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******************************************************************************/
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ACPI_INTEGER
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AcpiExDoMathOp (
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UINT16 Opcode,
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ACPI_INTEGER Integer0,
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ACPI_INTEGER Integer1)
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{
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ACPI_FUNCTION_ENTRY ();
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switch (Opcode)
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{
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case AML_ADD_OP: /* Add (Integer0, Integer1, Result) */
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return (Integer0 + Integer1);
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case AML_BIT_AND_OP: /* And (Integer0, Integer1, Result) */
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return (Integer0 & Integer1);
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case AML_BIT_NAND_OP: /* NAnd (Integer0, Integer1, Result) */
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return (~(Integer0 & Integer1));
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case AML_BIT_OR_OP: /* Or (Integer0, Integer1, Result) */
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return (Integer0 | Integer1);
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case AML_BIT_NOR_OP: /* NOr (Integer0, Integer1, Result) */
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|
|
return (~(Integer0 | Integer1));
|
|
|
|
|
|
case AML_BIT_XOR_OP: /* XOr (Integer0, Integer1, Result) */
|
|
|
|
return (Integer0 ^ Integer1);
|
|
|
|
|
|
case AML_MULTIPLY_OP: /* Multiply (Integer0, Integer1, Result) */
|
|
|
|
return (Integer0 * Integer1);
|
|
|
|
|
|
case AML_SHIFT_LEFT_OP: /* ShiftLeft (Operand, ShiftCount, Result)*/
|
|
|
|
/*
|
|
* We need to check if the shiftcount is larger than the integer bit
|
|
* width since the behavior of this is not well-defined in the C language.
|
|
*/
|
|
if (Integer1 >= AcpiGbl_IntegerBitWidth)
|
|
{
|
|
return (0);
|
|
}
|
|
return (Integer0 << Integer1);
|
|
|
|
|
|
case AML_SHIFT_RIGHT_OP: /* ShiftRight (Operand, ShiftCount, Result) */
|
|
|
|
/*
|
|
* We need to check if the shiftcount is larger than the integer bit
|
|
* width since the behavior of this is not well-defined in the C language.
|
|
*/
|
|
if (Integer1 >= AcpiGbl_IntegerBitWidth)
|
|
{
|
|
return (0);
|
|
}
|
|
return (Integer0 >> Integer1);
|
|
|
|
|
|
case AML_SUBTRACT_OP: /* Subtract (Integer0, Integer1, Result) */
|
|
|
|
return (Integer0 - Integer1);
|
|
|
|
default:
|
|
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiExDoLogicalNumericOp
|
|
*
|
|
* PARAMETERS: Opcode - AML opcode
|
|
* Integer0 - Integer operand #0
|
|
* Integer1 - Integer operand #1
|
|
* LogicalResult - TRUE/FALSE result of the operation
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Execute a logical "Numeric" AML opcode. For these Numeric
|
|
* operators (LAnd and LOr), both operands must be integers.
|
|
*
|
|
* Note: cleanest machine code seems to be produced by the code
|
|
* below, rather than using statements of the form:
|
|
* Result = (Integer0 && Integer1);
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiExDoLogicalNumericOp (
|
|
UINT16 Opcode,
|
|
ACPI_INTEGER Integer0,
|
|
ACPI_INTEGER Integer1,
|
|
BOOLEAN *LogicalResult)
|
|
{
|
|
ACPI_STATUS Status = AE_OK;
|
|
BOOLEAN LocalResult = FALSE;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (ExDoLogicalNumericOp);
|
|
|
|
|
|
switch (Opcode)
|
|
{
|
|
case AML_LAND_OP: /* LAnd (Integer0, Integer1) */
|
|
|
|
if (Integer0 && Integer1)
|
|
{
|
|
LocalResult = TRUE;
|
|
}
|
|
break;
|
|
|
|
case AML_LOR_OP: /* LOr (Integer0, Integer1) */
|
|
|
|
if (Integer0 || Integer1)
|
|
{
|
|
LocalResult = TRUE;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
Status = AE_AML_INTERNAL;
|
|
break;
|
|
}
|
|
|
|
/* Return the logical result and status */
|
|
|
|
*LogicalResult = LocalResult;
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiExDoLogicalOp
|
|
*
|
|
* PARAMETERS: Opcode - AML opcode
|
|
* Operand0 - operand #0
|
|
* Operand1 - operand #1
|
|
* LogicalResult - TRUE/FALSE result of the operation
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Execute a logical AML opcode. The purpose of having all of the
|
|
* functions here is to prevent a lot of pointer dereferencing
|
|
* to obtain the operands and to simplify the generation of the
|
|
* logical value. For the Numeric operators (LAnd and LOr), both
|
|
* operands must be integers. For the other logical operators,
|
|
* operands can be any combination of Integer/String/Buffer. The
|
|
* first operand determines the type to which the second operand
|
|
* will be converted.
|
|
*
|
|
* Note: cleanest machine code seems to be produced by the code
|
|
* below, rather than using statements of the form:
|
|
* Result = (Operand0 == Operand1);
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiExDoLogicalOp (
|
|
UINT16 Opcode,
|
|
ACPI_OPERAND_OBJECT *Operand0,
|
|
ACPI_OPERAND_OBJECT *Operand1,
|
|
BOOLEAN *LogicalResult)
|
|
{
|
|
ACPI_OPERAND_OBJECT *LocalOperand1 = Operand1;
|
|
ACPI_INTEGER Integer0;
|
|
ACPI_INTEGER Integer1;
|
|
UINT32 Length0;
|
|
UINT32 Length1;
|
|
ACPI_STATUS Status = AE_OK;
|
|
BOOLEAN LocalResult = FALSE;
|
|
int Compare;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (ExDoLogicalOp);
|
|
|
|
|
|
/*
|
|
* Convert the second operand if necessary. The first operand
|
|
* determines the type of the second operand, (See the Data Types
|
|
* section of the ACPI 3.0+ specification.) Both object types are
|
|
* guaranteed to be either Integer/String/Buffer by the operand
|
|
* resolution mechanism.
|
|
*/
|
|
switch (ACPI_GET_OBJECT_TYPE (Operand0))
|
|
{
|
|
case ACPI_TYPE_INTEGER:
|
|
Status = AcpiExConvertToInteger (Operand1, &LocalOperand1, 16);
|
|
break;
|
|
|
|
case ACPI_TYPE_STRING:
|
|
Status = AcpiExConvertToString (Operand1, &LocalOperand1,
|
|
ACPI_IMPLICIT_CONVERT_HEX);
|
|
break;
|
|
|
|
case ACPI_TYPE_BUFFER:
|
|
Status = AcpiExConvertToBuffer (Operand1, &LocalOperand1);
|
|
break;
|
|
|
|
default:
|
|
Status = AE_AML_INTERNAL;
|
|
break;
|
|
}
|
|
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto Cleanup;
|
|
}
|
|
|
|
/*
|
|
* Two cases: 1) Both Integers, 2) Both Strings or Buffers
|
|
*/
|
|
if (ACPI_GET_OBJECT_TYPE (Operand0) == ACPI_TYPE_INTEGER)
|
|
{
|
|
/*
|
|
* 1) Both operands are of type integer
|
|
* Note: LocalOperand1 may have changed above
|
|
*/
|
|
Integer0 = Operand0->Integer.Value;
|
|
Integer1 = LocalOperand1->Integer.Value;
|
|
|
|
switch (Opcode)
|
|
{
|
|
case AML_LEQUAL_OP: /* LEqual (Operand0, Operand1) */
|
|
|
|
if (Integer0 == Integer1)
|
|
{
|
|
LocalResult = TRUE;
|
|
}
|
|
break;
|
|
|
|
case AML_LGREATER_OP: /* LGreater (Operand0, Operand1) */
|
|
|
|
if (Integer0 > Integer1)
|
|
{
|
|
LocalResult = TRUE;
|
|
}
|
|
break;
|
|
|
|
case AML_LLESS_OP: /* LLess (Operand0, Operand1) */
|
|
|
|
if (Integer0 < Integer1)
|
|
{
|
|
LocalResult = TRUE;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
Status = AE_AML_INTERNAL;
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* 2) Both operands are Strings or both are Buffers
|
|
* Note: Code below takes advantage of common Buffer/String
|
|
* object fields. LocalOperand1 may have changed above. Use
|
|
* memcmp to handle nulls in buffers.
|
|
*/
|
|
Length0 = Operand0->Buffer.Length;
|
|
Length1 = LocalOperand1->Buffer.Length;
|
|
|
|
/* Lexicographic compare: compare the data bytes */
|
|
|
|
Compare = ACPI_MEMCMP (Operand0->Buffer.Pointer,
|
|
LocalOperand1->Buffer.Pointer,
|
|
(Length0 > Length1) ? Length1 : Length0);
|
|
|
|
switch (Opcode)
|
|
{
|
|
case AML_LEQUAL_OP: /* LEqual (Operand0, Operand1) */
|
|
|
|
/* Length and all bytes must be equal */
|
|
|
|
if ((Length0 == Length1) &&
|
|
(Compare == 0))
|
|
{
|
|
/* Length and all bytes match ==> TRUE */
|
|
|
|
LocalResult = TRUE;
|
|
}
|
|
break;
|
|
|
|
case AML_LGREATER_OP: /* LGreater (Operand0, Operand1) */
|
|
|
|
if (Compare > 0)
|
|
{
|
|
LocalResult = TRUE;
|
|
goto Cleanup; /* TRUE */
|
|
}
|
|
if (Compare < 0)
|
|
{
|
|
goto Cleanup; /* FALSE */
|
|
}
|
|
|
|
/* Bytes match (to shortest length), compare lengths */
|
|
|
|
if (Length0 > Length1)
|
|
{
|
|
LocalResult = TRUE;
|
|
}
|
|
break;
|
|
|
|
case AML_LLESS_OP: /* LLess (Operand0, Operand1) */
|
|
|
|
if (Compare > 0)
|
|
{
|
|
goto Cleanup; /* FALSE */
|
|
}
|
|
if (Compare < 0)
|
|
{
|
|
LocalResult = TRUE;
|
|
goto Cleanup; /* TRUE */
|
|
}
|
|
|
|
/* Bytes match (to shortest length), compare lengths */
|
|
|
|
if (Length0 < Length1)
|
|
{
|
|
LocalResult = TRUE;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
Status = AE_AML_INTERNAL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
Cleanup:
|
|
|
|
/* New object was created if implicit conversion performed - delete */
|
|
|
|
if (LocalOperand1 != Operand1)
|
|
{
|
|
AcpiUtRemoveReference (LocalOperand1);
|
|
}
|
|
|
|
/* Return the logical result and status */
|
|
|
|
*LogicalResult = LocalResult;
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|