640 lines
20 KiB
C
640 lines
20 KiB
C
/******************************************************************************
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*
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* Module Name: exfield - ACPI AML (p-code) execution - field manipulation
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* $Revision: 91 $
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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, 2000, 2001, 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 __EXFIELD_C__
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#include "acpi.h"
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#include "acdispat.h"
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#include "acinterp.h"
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#include "amlcode.h"
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#include "acnamesp.h"
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#include "achware.h"
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#include "acevents.h"
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#define _COMPONENT ACPI_EXECUTER
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MODULE_NAME ("exfield")
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/*******************************************************************************
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*
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* FUNCTION: AcpiExReadDataFromField
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*
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* PARAMETERS: Mode - ACPI_READ or ACPI_WRITE
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* *FieldNode - Parent node for field to be accessed
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* *Buffer - Value(s) to be read or written
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* BufferLength - Number of bytes to transfer
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*
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* RETURN: Status3
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*
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* DESCRIPTION: Read or write a named field
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExReadDataFromField (
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ACPI_OPERAND_OBJECT *ObjDesc,
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ACPI_OPERAND_OBJECT **RetBufferDesc)
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{
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ACPI_STATUS Status;
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ACPI_OPERAND_OBJECT *BufferDesc;
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UINT32 Length;
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void *Buffer;
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FUNCTION_TRACE_PTR ("ExReadDataFromField", ObjDesc);
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/* Parameter validation */
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if (!ObjDesc)
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{
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return_ACPI_STATUS (AE_AML_NO_OPERAND);
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}
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/*
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* Allocate a buffer for the contents of the field.
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*
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* If the field is larger than the size of an ACPI_INTEGER, create
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* a BUFFER to hold it. Otherwise, use an INTEGER. This allows
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* the use of arithmetic operators on the returned value if the
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* field size is equal or smaller than an Integer.
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*
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* Note: Field.length is in bits.
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*/
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Length = ROUND_BITS_UP_TO_BYTES (ObjDesc->Field.BitLength);
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if (Length > sizeof (ACPI_INTEGER))
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{
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/* Field is too large for an Integer, create a Buffer instead */
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BufferDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER);
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if (!BufferDesc)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/* Create the actual read buffer */
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BufferDesc->Buffer.Pointer = ACPI_MEM_CALLOCATE (Length);
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if (!BufferDesc->Buffer.Pointer)
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{
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AcpiUtRemoveReference (BufferDesc);
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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BufferDesc->Buffer.Length = Length;
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Buffer = BufferDesc->Buffer.Pointer;
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}
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else
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{
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/* Field will fit within an Integer (normal case) */
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BufferDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
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if (!BufferDesc)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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Length = sizeof (BufferDesc->Integer.Value);
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Buffer = &BufferDesc->Integer.Value;
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}
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/* Read from the appropriate field */
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switch (ObjDesc->Common.Type)
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{
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case ACPI_TYPE_BUFFER_FIELD:
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Status = AcpiExAccessBufferField (ACPI_READ, ObjDesc, Buffer, Length);
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break;
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case INTERNAL_TYPE_REGION_FIELD:
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Status = AcpiExAccessRegionField (ACPI_READ, ObjDesc, Buffer, Length);
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break;
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case INTERNAL_TYPE_BANK_FIELD:
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Status = AcpiExAccessBankField (ACPI_READ, ObjDesc, Buffer, Length);
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break;
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case INTERNAL_TYPE_INDEX_FIELD:
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Status = AcpiExAccessIndexField (ACPI_READ, ObjDesc, Buffer, Length);
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break;
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default:
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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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AcpiUtRemoveReference (BufferDesc);
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}
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else if (RetBufferDesc)
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{
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*RetBufferDesc = BufferDesc;
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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: AcpiExWriteDataToField
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*
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* PARAMETERS: Mode - ACPI_READ or ACPI_WRITE
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* *FieldNode - Parent node for field to be accessed
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* *Buffer - Value(s) to be read or written
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* BufferLength - Number of bytes to transfer
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*
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* RETURN: Status
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*
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* DESCRIPTION: Read or write a named field
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExWriteDataToField (
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ACPI_OPERAND_OBJECT *SourceDesc,
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ACPI_OPERAND_OBJECT *ObjDesc)
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{
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ACPI_STATUS Status;
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UINT32 Length;
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void *Buffer;
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FUNCTION_TRACE_PTR ("ExWriteDataToField", ObjDesc);
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/* Parameter validation */
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if (!SourceDesc || !ObjDesc)
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{
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return_ACPI_STATUS (AE_AML_NO_OPERAND);
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}
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/*
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* Get a pointer to the data to be written
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*/
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switch (SourceDesc->Common.Type)
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{
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case ACPI_TYPE_INTEGER:
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Buffer = &SourceDesc->Integer.Value;
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Length = sizeof (SourceDesc->Integer.Value);
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break;
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case ACPI_TYPE_BUFFER:
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Buffer = SourceDesc->Buffer.Pointer;
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Length = SourceDesc->Buffer.Length;
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break;
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case ACPI_TYPE_STRING:
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Buffer = SourceDesc->String.Pointer;
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Length = SourceDesc->String.Length;
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break;
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default:
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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/*
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* Decode the type of field to be written
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*/
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switch (ObjDesc->Common.Type)
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{
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case ACPI_TYPE_BUFFER_FIELD:
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Status = AcpiExAccessBufferField (ACPI_WRITE, ObjDesc, Buffer, Length);
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break;
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case INTERNAL_TYPE_REGION_FIELD:
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Status = AcpiExAccessRegionField (ACPI_WRITE, ObjDesc, Buffer, Length);
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break;
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case INTERNAL_TYPE_BANK_FIELD:
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Status = AcpiExAccessBankField (ACPI_WRITE, ObjDesc, Buffer, Length);
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break;
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case INTERNAL_TYPE_INDEX_FIELD:
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Status = AcpiExAccessIndexField (ACPI_WRITE, ObjDesc, Buffer, Length);
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break;
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default:
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return_ACPI_STATUS (AE_AML_INTERNAL);
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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: AcpiExAccessBufferField
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*
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* PARAMETERS: Mode - ACPI_READ or ACPI_WRITE
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* *FieldNode - Parent node for field to be accessed
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* *Buffer - Value(s) to be read or written
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* BufferLength - Number of bytes to transfer
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*
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* RETURN: Status
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*
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* DESCRIPTION: Read or write a named field
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExAccessBufferField (
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UINT32 Mode,
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ACPI_OPERAND_OBJECT *ObjDesc,
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void *Buffer,
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UINT32 BufferLength)
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{
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ACPI_STATUS Status;
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FUNCTION_TRACE_PTR ("AcpiExAccessBufferField", ObjDesc);
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/*
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* If the BufferField arguments have not been previously evaluated,
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* evaluate them now and save the results.
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*/
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if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID))
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{
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Status = AcpiDsGetBufferFieldArguments (ObjDesc);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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}
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Status = AcpiExCommonAccessField (Mode, ObjDesc, Buffer, BufferLength);
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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: AcpiExAccessRegionField
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*
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* PARAMETERS: Mode - ACPI_READ or ACPI_WRITE
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* *FieldNode - Parent node for field to be accessed
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* *Buffer - Value(s) to be read or written
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* BufferLength - Number of bytes to transfer
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*
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* RETURN: Status
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*
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* DESCRIPTION: Read or write a named field
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExAccessRegionField (
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UINT32 Mode,
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ACPI_OPERAND_OBJECT *ObjDesc,
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void *Buffer,
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UINT32 BufferLength)
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{
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ACPI_STATUS Status;
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BOOLEAN Locked;
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FUNCTION_TRACE_PTR ("ExAccessRegionField", ObjDesc);
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/*
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* Get the global lock if needed
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*/
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Locked = AcpiExAcquireGlobalLock (ObjDesc->Field.LockRule);
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Status = AcpiExCommonAccessField (Mode, ObjDesc, Buffer, BufferLength);
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/*
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* Release global lock if we acquired it earlier
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*/
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AcpiExReleaseGlobalLock (Locked);
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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: AcpiExAccessBankField
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*
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* PARAMETERS: Mode - ACPI_READ or ACPI_WRITE
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* *FieldNode - Parent node for field to be accessed
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* *Buffer - Value(s) to be read or written
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* BufferLength - Number of bytes to transfer
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*
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* RETURN: Status
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*
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* DESCRIPTION: Read or write a Bank Field
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExAccessBankField (
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UINT32 Mode,
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ACPI_OPERAND_OBJECT *ObjDesc,
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void *Buffer,
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UINT32 BufferLength)
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{
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ACPI_STATUS Status;
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BOOLEAN Locked;
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FUNCTION_TRACE_PTR ("ExAccessBankField", ObjDesc);
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/*
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* Get the global lock if needed
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*/
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Locked = AcpiExAcquireGlobalLock (ObjDesc->BankField.LockRule);
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/*
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* Write the BankValue to the BankRegister to select the bank.
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* The BankValue for this BankField is specified in the
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* BankField ASL declaration. The BankRegister is always a Field in
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* an operation region.
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*/
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Status = AcpiExCommonAccessField (ACPI_WRITE,
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ObjDesc->BankField.BankRegisterObj,
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&ObjDesc->BankField.Value,
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sizeof (ObjDesc->BankField.Value));
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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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* The bank was successfully selected, now read or write the actual
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* data.
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*/
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Status = AcpiExCommonAccessField (Mode, ObjDesc, Buffer, BufferLength);
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Cleanup:
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/*
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* Release global lock if we acquired it earlier
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*/
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AcpiExReleaseGlobalLock (Locked);
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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: AcpiExAccessIndexField
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*
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* PARAMETERS: Mode - ACPI_READ or ACPI_WRITE
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* *FieldNode - Parent node for field to be accessed
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* *Buffer - Value(s) to be read or written
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* BufferLength - Number of bytes to transfer
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*
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* RETURN: Status
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*
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* DESCRIPTION: Read or write a Index Field
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExAccessIndexField (
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UINT32 Mode,
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ACPI_OPERAND_OBJECT *ObjDesc,
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void *Buffer,
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UINT32 BufferLength)
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{
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ACPI_STATUS Status;
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BOOLEAN Locked;
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FUNCTION_TRACE_PTR ("ExAccessIndexField", ObjDesc);
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/*
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* Get the global lock if needed
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*/
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Locked = AcpiExAcquireGlobalLock (ObjDesc->IndexField.LockRule);
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/*
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* Set Index value to select proper Data register
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*/
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Status = AcpiExCommonAccessField (ACPI_WRITE,
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ObjDesc->IndexField.IndexObj,
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&ObjDesc->IndexField.Value,
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sizeof (ObjDesc->IndexField.Value));
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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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/* Now read/write the data register */
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Status = AcpiExCommonAccessField (Mode, ObjDesc->IndexField.DataObj,
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Buffer, BufferLength);
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Cleanup:
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/*
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* Release global lock if we acquired it earlier
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*/
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AcpiExReleaseGlobalLock (Locked);
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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: AcpiExCommonAccessField
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*
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* PARAMETERS: Mode - ACPI_READ or ACPI_WRITE
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* *FieldNode - Parent node for field to be accessed
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* *Buffer - Value(s) to be read or written
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* BufferLength - Size of buffer, in bytes. Must be large
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* enough for all bits of the field.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Read or write a named field
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExCommonAccessField (
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UINT32 Mode,
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ACPI_OPERAND_OBJECT *ObjDesc,
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void *Buffer,
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UINT32 BufferLength)
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{
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ACPI_STATUS Status;
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FUNCTION_TRACE_PTR ("ExCommonAccessField", ObjDesc);
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DEBUG_PRINTP (ACPI_INFO, ("Obj=%p Type=%X Buf=%p Len=%X\n",
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ObjDesc, ObjDesc->Common.Type, Buffer, BufferLength));
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DEBUG_PRINTP (ACPI_INFO, ("Mode=%d BitLen=%X BitOff=%X ByteOff=%X\n",
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Mode, ObjDesc->CommonField.BitLength,
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ObjDesc->CommonField.StartFieldBitOffset,
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ObjDesc->CommonField.BaseByteOffset));
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/* Perform the actual read or write of the field */
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switch (Mode)
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{
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case ACPI_READ:
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Status = AcpiExExtractFromField (ObjDesc, Buffer, BufferLength);
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break;
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case ACPI_WRITE:
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Status = AcpiExInsertIntoField (ObjDesc, Buffer, BufferLength);
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break;
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default:
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DEBUG_PRINTP (ACPI_ERROR, ("Unknown I/O Mode: %X\n", Mode));
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Status = AE_BAD_PARAMETER;
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break;
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}
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return_ACPI_STATUS (Status);
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}
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