771 lines
25 KiB
C
771 lines
25 KiB
C
/******************************************************************************
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*
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* Module Name: dsfield - Dispatcher field routines
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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 - 2009, 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 __DSFIELD_C__
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#include <contrib/dev/acpica/include/acpi.h>
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#include <contrib/dev/acpica/include/accommon.h>
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#include <contrib/dev/acpica/include/amlcode.h>
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#include <contrib/dev/acpica/include/acdispat.h>
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#include <contrib/dev/acpica/include/acinterp.h>
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#include <contrib/dev/acpica/include/acnamesp.h>
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#include <contrib/dev/acpica/include/acparser.h>
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#define _COMPONENT ACPI_DISPATCHER
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ACPI_MODULE_NAME ("dsfield")
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/* Local prototypes */
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static ACPI_STATUS
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AcpiDsGetFieldNames (
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ACPI_CREATE_FIELD_INFO *Info,
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ACPI_WALK_STATE *WalkState,
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ACPI_PARSE_OBJECT *Arg);
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsCreateBufferField
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*
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* PARAMETERS: Op - Current parse op (CreateXXField)
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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: Execute the CreateField operators:
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* CreateBitFieldOp,
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* CreateByteFieldOp,
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* CreateWordFieldOp,
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* CreateDWordFieldOp,
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* CreateQWordFieldOp,
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* CreateFieldOp (all of which define a field in a buffer)
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiDsCreateBufferField (
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ACPI_PARSE_OBJECT *Op,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_PARSE_OBJECT *Arg;
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ACPI_NAMESPACE_NODE *Node;
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ACPI_STATUS Status;
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_OPERAND_OBJECT *SecondDesc = NULL;
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UINT32 Flags;
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ACPI_FUNCTION_TRACE (DsCreateBufferField);
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/*
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* Get the NameString argument (name of the new BufferField)
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*/
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if (Op->Common.AmlOpcode == AML_CREATE_FIELD_OP)
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{
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/* For CreateField, name is the 4th argument */
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Arg = AcpiPsGetArg (Op, 3);
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}
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else
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{
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/* For all other CreateXXXField operators, name is the 3rd argument */
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Arg = AcpiPsGetArg (Op, 2);
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}
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if (!Arg)
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{
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return_ACPI_STATUS (AE_AML_NO_OPERAND);
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}
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if (WalkState->DeferredNode)
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{
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Node = WalkState->DeferredNode;
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Status = AE_OK;
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}
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else
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{
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/* Execute flag should always be set when this function is entered */
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if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE))
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{
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return_ACPI_STATUS (AE_AML_INTERNAL);
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}
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/* Creating new namespace node, should not already exist */
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Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
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ACPI_NS_ERROR_IF_FOUND;
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/* Mark node temporary if we are executing a method */
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if (WalkState->MethodNode)
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{
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Flags |= ACPI_NS_TEMPORARY;
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}
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/* Enter the NameString into the namespace */
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Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
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ACPI_TYPE_ANY, ACPI_IMODE_LOAD_PASS1,
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Flags, WalkState, &Node);
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if (ACPI_FAILURE (Status))
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{
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ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status);
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return_ACPI_STATUS (Status);
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}
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}
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/*
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* We could put the returned object (Node) on the object stack for later,
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* but for now, we will put it in the "op" object that the parser uses,
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* so we can get it again at the end of this scope.
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*/
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Op->Common.Node = Node;
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/*
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* If there is no object attached to the node, this node was just created
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* and we need to create the field object. Otherwise, this was a lookup
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* of an existing node and we don't want to create the field object again.
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*/
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ObjDesc = AcpiNsGetAttachedObject (Node);
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if (ObjDesc)
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{
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return_ACPI_STATUS (AE_OK);
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}
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/*
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* The Field definition is not fully parsed at this time.
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* (We must save the address of the AML for the buffer and index operands)
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*/
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/* Create the buffer field object */
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ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER_FIELD);
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if (!ObjDesc)
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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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/*
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* Remember location in AML stream of the field unit opcode and operands --
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* since the buffer and index operands must be evaluated.
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*/
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SecondDesc = ObjDesc->Common.NextObject;
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SecondDesc->Extra.AmlStart = Op->Named.Data;
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SecondDesc->Extra.AmlLength = Op->Named.Length;
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ObjDesc->BufferField.Node = Node;
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/* Attach constructed field descriptors to parent node */
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Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_BUFFER_FIELD);
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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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Cleanup:
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/* Remove local reference to the 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: AcpiDsGetFieldNames
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*
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* PARAMETERS: Info - CreateField info structure
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* ` WalkState - Current method state
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* Arg - First parser arg for the field name list
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*
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* RETURN: Status
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*
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* DESCRIPTION: Process all named fields in a field declaration. Names are
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* entered into the namespace.
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiDsGetFieldNames (
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ACPI_CREATE_FIELD_INFO *Info,
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ACPI_WALK_STATE *WalkState,
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ACPI_PARSE_OBJECT *Arg)
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{
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ACPI_STATUS Status;
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ACPI_INTEGER Position;
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ACPI_FUNCTION_TRACE_PTR (DsGetFieldNames, Info);
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/* First field starts at bit zero */
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Info->FieldBitPosition = 0;
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/* Process all elements in the field list (of parse nodes) */
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while (Arg)
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{
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/*
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* Three types of field elements are handled:
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* 1) Offset - specifies a bit offset
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* 2) AccessAs - changes the access mode
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* 3) Name - Enters a new named field into the namespace
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*/
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switch (Arg->Common.AmlOpcode)
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{
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case AML_INT_RESERVEDFIELD_OP:
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Position = (ACPI_INTEGER) Info->FieldBitPosition
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+ (ACPI_INTEGER) Arg->Common.Value.Size;
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if (Position > ACPI_UINT32_MAX)
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{
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ACPI_ERROR ((AE_INFO,
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"Bit offset within field too large (> 0xFFFFFFFF)"));
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return_ACPI_STATUS (AE_SUPPORT);
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}
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Info->FieldBitPosition = (UINT32) Position;
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break;
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case AML_INT_ACCESSFIELD_OP:
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/*
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* Get a new AccessType and AccessAttribute -- to be used for all
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* field units that follow, until field end or another AccessAs
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* keyword.
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*
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* In FieldFlags, preserve the flag bits other than the
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* ACCESS_TYPE bits
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*/
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Info->FieldFlags = (UINT8)
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((Info->FieldFlags & ~(AML_FIELD_ACCESS_TYPE_MASK)) |
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((UINT8) ((UINT32) Arg->Common.Value.Integer >> 8)));
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Info->Attribute = (UINT8) (Arg->Common.Value.Integer);
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break;
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case AML_INT_NAMEDFIELD_OP:
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/* Lookup the name, it should already exist */
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Status = AcpiNsLookup (WalkState->ScopeInfo,
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(char *) &Arg->Named.Name, Info->FieldType,
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ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE,
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WalkState, &Info->FieldNode);
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if (ACPI_FAILURE (Status))
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{
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ACPI_ERROR_NAMESPACE ((char *) &Arg->Named.Name, Status);
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return_ACPI_STATUS (Status);
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}
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else
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{
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Arg->Common.Node = Info->FieldNode;
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Info->FieldBitLength = Arg->Common.Value.Size;
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/*
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* If there is no object attached to the node, this node was
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* just created and we need to create the field object.
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* Otherwise, this was a lookup of an existing node and we
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* don't want to create the field object again.
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*/
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if (!AcpiNsGetAttachedObject (Info->FieldNode))
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{
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Status = AcpiExPrepFieldValue (Info);
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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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}
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}
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/* Keep track of bit position for the next field */
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Position = (ACPI_INTEGER) Info->FieldBitPosition
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+ (ACPI_INTEGER) Arg->Common.Value.Size;
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if (Position > ACPI_UINT32_MAX)
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{
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ACPI_ERROR ((AE_INFO,
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"Field [%4.4s] bit offset too large (> 0xFFFFFFFF)",
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ACPI_CAST_PTR (char, &Info->FieldNode->Name)));
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return_ACPI_STATUS (AE_SUPPORT);
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}
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Info->FieldBitPosition += Info->FieldBitLength;
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break;
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default:
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ACPI_ERROR ((AE_INFO,
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"Invalid opcode in field list: %X", Arg->Common.AmlOpcode));
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return_ACPI_STATUS (AE_AML_BAD_OPCODE);
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}
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Arg = Arg->Common.Next;
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}
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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: AcpiDsCreateField
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*
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* PARAMETERS: Op - Op containing the Field definition and args
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* RegionNode - Object for the containing Operation Region
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* ` WalkState - Current method state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Create a new field in the specified operation region
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiDsCreateField (
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ACPI_PARSE_OBJECT *Op,
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ACPI_NAMESPACE_NODE *RegionNode,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_STATUS Status;
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ACPI_PARSE_OBJECT *Arg;
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ACPI_CREATE_FIELD_INFO Info;
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ACPI_FUNCTION_TRACE_PTR (DsCreateField, Op);
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/* First arg is the name of the parent OpRegion (must already exist) */
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Arg = Op->Common.Value.Arg;
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if (!RegionNode)
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{
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Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name,
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ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE,
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ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode);
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if (ACPI_FAILURE (Status))
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{
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ACPI_ERROR_NAMESPACE (Arg->Common.Value.Name, Status);
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return_ACPI_STATUS (Status);
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}
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}
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/* Second arg is the field flags */
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Arg = Arg->Common.Next;
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Info.FieldFlags = (UINT8) Arg->Common.Value.Integer;
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Info.Attribute = 0;
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/* Each remaining arg is a Named Field */
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Info.FieldType = ACPI_TYPE_LOCAL_REGION_FIELD;
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Info.RegionNode = RegionNode;
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Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next);
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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: AcpiDsInitFieldObjects
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*
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* PARAMETERS: Op - Op containing the Field definition and args
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* ` WalkState - Current method state
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*
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* RETURN: Status
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*
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* DESCRIPTION: For each "Field Unit" name in the argument list that is
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* part of the field declaration, enter the name into the
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* namespace.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiDsInitFieldObjects (
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ACPI_PARSE_OBJECT *Op,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_STATUS Status;
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ACPI_PARSE_OBJECT *Arg = NULL;
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ACPI_NAMESPACE_NODE *Node;
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UINT8 Type = 0;
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UINT32 Flags;
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ACPI_FUNCTION_TRACE_PTR (DsInitFieldObjects, Op);
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/* Execute flag should always be set when this function is entered */
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if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE))
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{
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if (WalkState->ParseFlags & ACPI_PARSE_DEFERRED_OP)
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{
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/* BankField Op is deferred, just return OK */
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return_ACPI_STATUS (AE_OK);
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}
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return_ACPI_STATUS (AE_AML_INTERNAL);
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}
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/*
|
|
* Get the FieldList argument for this opcode. This is the start of the
|
|
* list of field elements.
|
|
*/
|
|
switch (WalkState->Opcode)
|
|
{
|
|
case AML_FIELD_OP:
|
|
Arg = AcpiPsGetArg (Op, 2);
|
|
Type = ACPI_TYPE_LOCAL_REGION_FIELD;
|
|
break;
|
|
|
|
case AML_BANK_FIELD_OP:
|
|
Arg = AcpiPsGetArg (Op, 4);
|
|
Type = ACPI_TYPE_LOCAL_BANK_FIELD;
|
|
break;
|
|
|
|
case AML_INDEX_FIELD_OP:
|
|
Arg = AcpiPsGetArg (Op, 3);
|
|
Type = ACPI_TYPE_LOCAL_INDEX_FIELD;
|
|
break;
|
|
|
|
default:
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Creating new namespace node(s), should not already exist */
|
|
|
|
Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
|
|
ACPI_NS_ERROR_IF_FOUND;
|
|
|
|
/* Mark node(s) temporary if we are executing a method */
|
|
|
|
if (WalkState->MethodNode)
|
|
{
|
|
Flags |= ACPI_NS_TEMPORARY;
|
|
}
|
|
|
|
/*
|
|
* Walk the list of entries in the FieldList
|
|
* Note: FieldList can be of zero length. In this case, Arg will be NULL.
|
|
*/
|
|
while (Arg)
|
|
{
|
|
/*
|
|
* Ignore OFFSET and ACCESSAS terms here; we are only interested in the
|
|
* field names in order to enter them into the namespace.
|
|
*/
|
|
if (Arg->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP)
|
|
{
|
|
Status = AcpiNsLookup (WalkState->ScopeInfo,
|
|
(char *) &Arg->Named.Name, Type, ACPI_IMODE_LOAD_PASS1,
|
|
Flags, WalkState, &Node);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_ERROR_NAMESPACE ((char *) &Arg->Named.Name, Status);
|
|
if (Status != AE_ALREADY_EXISTS)
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Name already exists, just ignore this error */
|
|
|
|
Status = AE_OK;
|
|
}
|
|
|
|
Arg->Common.Node = Node;
|
|
}
|
|
|
|
/* Get the next field element in the list */
|
|
|
|
Arg = Arg->Common.Next;
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsCreateBankField
|
|
*
|
|
* PARAMETERS: Op - Op containing the Field definition and args
|
|
* RegionNode - Object for the containing Operation Region
|
|
* WalkState - Current method state
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Create a new bank field in the specified operation region
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiDsCreateBankField (
|
|
ACPI_PARSE_OBJECT *Op,
|
|
ACPI_NAMESPACE_NODE *RegionNode,
|
|
ACPI_WALK_STATE *WalkState)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_PARSE_OBJECT *Arg;
|
|
ACPI_CREATE_FIELD_INFO Info;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR (DsCreateBankField, Op);
|
|
|
|
|
|
/* First arg is the name of the parent OpRegion (must already exist) */
|
|
|
|
Arg = Op->Common.Value.Arg;
|
|
if (!RegionNode)
|
|
{
|
|
Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name,
|
|
ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE,
|
|
ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_ERROR_NAMESPACE (Arg->Common.Value.Name, Status);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
}
|
|
|
|
/* Second arg is the Bank Register (Field) (must already exist) */
|
|
|
|
Arg = Arg->Common.Next;
|
|
Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
|
|
ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
|
|
ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/*
|
|
* Third arg is the BankValue
|
|
* This arg is a TermArg, not a constant
|
|
* It will be evaluated later, by AcpiDsEvalBankFieldOperands
|
|
*/
|
|
Arg = Arg->Common.Next;
|
|
|
|
/* Fourth arg is the field flags */
|
|
|
|
Arg = Arg->Common.Next;
|
|
Info.FieldFlags = (UINT8) Arg->Common.Value.Integer;
|
|
|
|
/* Each remaining arg is a Named Field */
|
|
|
|
Info.FieldType = ACPI_TYPE_LOCAL_BANK_FIELD;
|
|
Info.RegionNode = RegionNode;
|
|
|
|
/*
|
|
* Use Info.DataRegisterNode to store BankField Op
|
|
* It's safe because DataRegisterNode will never be used when create bank field
|
|
* We store AmlStart and AmlLength in the BankField Op for late evaluation
|
|
* Used in AcpiExPrepFieldValue(Info)
|
|
*
|
|
* TBD: Or, should we add a field in ACPI_CREATE_FIELD_INFO, like "void *ParentOp"?
|
|
*/
|
|
Info.DataRegisterNode = (ACPI_NAMESPACE_NODE*) Op;
|
|
|
|
Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsCreateIndexField
|
|
*
|
|
* PARAMETERS: Op - Op containing the Field definition and args
|
|
* RegionNode - Object for the containing Operation Region
|
|
* ` WalkState - Current method state
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Create a new index field in the specified operation region
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiDsCreateIndexField (
|
|
ACPI_PARSE_OBJECT *Op,
|
|
ACPI_NAMESPACE_NODE *RegionNode,
|
|
ACPI_WALK_STATE *WalkState)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_PARSE_OBJECT *Arg;
|
|
ACPI_CREATE_FIELD_INFO Info;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR (DsCreateIndexField, Op);
|
|
|
|
|
|
/* First arg is the name of the Index register (must already exist) */
|
|
|
|
Arg = Op->Common.Value.Arg;
|
|
Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
|
|
ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
|
|
ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Second arg is the data register (must already exist) */
|
|
|
|
Arg = Arg->Common.Next;
|
|
Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
|
|
ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
|
|
ACPI_NS_SEARCH_PARENT, WalkState, &Info.DataRegisterNode);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Next arg is the field flags */
|
|
|
|
Arg = Arg->Common.Next;
|
|
Info.FieldFlags = (UINT8) Arg->Common.Value.Integer;
|
|
|
|
/* Each remaining arg is a Named Field */
|
|
|
|
Info.FieldType = ACPI_TYPE_LOCAL_INDEX_FIELD;
|
|
Info.RegionNode = RegionNode;
|
|
|
|
Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next);
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|