862 lines
27 KiB
C
862 lines
27 KiB
C
/******************************************************************************
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*
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* Module Name: amfldio - Aml Field I/O
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* $Revision: 39 $
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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 __AMFLDIO_C__
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#include "acpi.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 INTERPRETER
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MODULE_NAME ("amfldio")
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/*******************************************************************************
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*
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* FUNCTION: AcpiAmlReadFieldData
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*
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* PARAMETERS: *ObjDesc - Field to be read
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* *Value - Where to store value
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* FieldBitWidth - Field Width in bits (8, 16, or 32)
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*
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* RETURN: Status
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*
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* DESCRIPTION: Retrieve the value of the given field
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiAmlReadFieldData (
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ACPI_OPERAND_OBJECT *ObjDesc,
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UINT32 FieldByteOffset,
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UINT32 FieldBitWidth,
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UINT32 *Value)
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{
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ACPI_STATUS Status;
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ACPI_OPERAND_OBJECT *RgnDesc = NULL;
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ACPI_PHYSICAL_ADDRESS Address;
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UINT32 LocalValue = 0;
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UINT32 FieldByteWidth;
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FUNCTION_TRACE ("AmlReadFieldData");
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/* ObjDesc is validated by callers */
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if (ObjDesc)
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{
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RgnDesc = ObjDesc->Field.Container;
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}
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FieldByteWidth = DIV_8 (FieldBitWidth);
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Status = AcpiAmlSetupField (ObjDesc, RgnDesc, FieldBitWidth);
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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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/* SetupField validated RgnDesc and FieldBitWidth */
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if (!Value)
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{
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Value = &LocalValue; /* support reads without saving value */
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}
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/*
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* Set offset to next multiple of field width,
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* add region base address and offset within the field
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*/
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Address = RgnDesc->Region.Address +
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(ObjDesc->Field.Offset * FieldByteWidth) +
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FieldByteOffset;
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DEBUG_PRINT (TRACE_OPREGION,
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("AmlReadFieldData: Region %s(%X) at %08lx width %X\n",
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AcpiCmGetRegionName (RgnDesc->Region.SpaceId),
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RgnDesc->Region.SpaceId, Address,
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FieldBitWidth));
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/* Invoke the appropriate AddressSpace/OpRegion handler */
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Status = AcpiEvAddressSpaceDispatch (RgnDesc, ADDRESS_SPACE_READ,
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Address, FieldBitWidth, Value);
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if (Status == AE_NOT_IMPLEMENTED)
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{
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DEBUG_PRINT (ACPI_ERROR,
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("AmlReadFieldData: **** Region %s(%X) not implemented\n",
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AcpiCmGetRegionName (RgnDesc->Region.SpaceId),
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RgnDesc->Region.SpaceId));
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}
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else if (Status == AE_NOT_EXIST)
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{
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DEBUG_PRINT (ACPI_ERROR,
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("AmlReadFieldData: **** Region %s(%X) has no handler\n",
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AcpiCmGetRegionName (RgnDesc->Region.SpaceId),
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RgnDesc->Region.SpaceId));
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}
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DEBUG_PRINT (TRACE_OPREGION,
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("AmlReadField: Returned value=%08lx \n", *Value));
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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: AcpiAmlReadField
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*
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* PARAMETERS: *ObjDesc - Field to be read
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* *Value - Where to store value
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* FieldBitWidth - Field Width in bits (8, 16, or 32)
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*
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* RETURN: Status
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*
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* DESCRIPTION: Retrieve the value of the given field
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiAmlReadField (
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ACPI_OPERAND_OBJECT *ObjDesc,
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void *Buffer,
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UINT32 BufferLength,
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UINT32 ByteLength,
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UINT32 DatumLength,
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UINT32 BitGranularity,
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UINT32 ByteGranularity)
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{
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ACPI_STATUS Status;
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UINT32 ThisFieldByteOffset;
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UINT32 ThisFieldDatumOffset;
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UINT32 PreviousRawDatum;
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UINT32 ThisRawDatum = 0;
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UINT32 ValidFieldBits;
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UINT32 Mask;
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UINT32 MergedDatum = 0;
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FUNCTION_TRACE ("AmlReadField");
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/*
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* Clear the caller's buffer (the whole buffer length as given)
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* This is very important, especially in the cases where a byte is read,
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* but the buffer is really a UINT32 (4 bytes).
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*/
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MEMSET (Buffer, 0, BufferLength);
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/* Read the first raw datum to prime the loop */
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ThisFieldByteOffset = 0;
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ThisFieldDatumOffset= 0;
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Status = AcpiAmlReadFieldData (ObjDesc, ThisFieldByteOffset, BitGranularity,
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&PreviousRawDatum);
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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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/* We might actually be done if the request fits in one datum */
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if ((DatumLength == 1) &&
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((ObjDesc->Field.BitOffset + ObjDesc->FieldUnit.Length) <=
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(UINT16) BitGranularity))
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{
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MergedDatum = PreviousRawDatum;
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MergedDatum = (MergedDatum >> ObjDesc->Field.BitOffset);
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ValidFieldBits = ObjDesc->FieldUnit.Length % BitGranularity;
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if (ValidFieldBits)
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{
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Mask = (((UINT32) 1 << ValidFieldBits) - (UINT32) 1);
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MergedDatum &= Mask;
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}
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/*
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* Place the MergedDatum into the proper format and return buffer
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* field
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*/
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switch (ByteGranularity)
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{
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case 1:
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((UINT8 *) Buffer) [ThisFieldDatumOffset] = (UINT8) MergedDatum;
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break;
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case 2:
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MOVE_UNALIGNED16_TO_16 (&(((UINT16 *) Buffer)[ThisFieldDatumOffset]), &MergedDatum);
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break;
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case 4:
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MOVE_UNALIGNED32_TO_32 (&(((UINT32 *) Buffer)[ThisFieldDatumOffset]), &MergedDatum);
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break;
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}
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ThisFieldByteOffset = 1;
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ThisFieldDatumOffset = 1;
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}
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else
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{
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/* We need to get more raw data to complete one or more field data */
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while (ThisFieldDatumOffset < DatumLength)
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{
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/*
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* If the field is aligned on a byte boundary, we don't want
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* to perform a final read, since this would potentially read
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* past the end of the region.
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*
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* TBD: [Investigate] It may make more sense to just split the aligned
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* and non-aligned cases since the aligned case is so very simple,
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*/
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if ((ObjDesc->Field.BitOffset != 0) ||
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((ObjDesc->Field.BitOffset == 0) &&
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(ThisFieldDatumOffset < (DatumLength -1))))
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{
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/*
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* Get the next raw datum, it contains some or all bits
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* of the current field datum
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*/
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Status = AcpiAmlReadFieldData (ObjDesc,
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ThisFieldByteOffset + ByteGranularity,
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BitGranularity, &ThisRawDatum);
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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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/* Before merging the data, make sure the unused bits are clear */
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switch (ByteGranularity)
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{
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case 1:
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ThisRawDatum &= 0x000000FF;
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PreviousRawDatum &= 0x000000FF;
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break;
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case 2:
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ThisRawDatum &= 0x0000FFFF;
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PreviousRawDatum &= 0x0000FFFF;
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break;
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}
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}
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/*
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* Put together bits of the two raw data to make a complete
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* field datum
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*/
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if (ObjDesc->Field.BitOffset != 0)
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{
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MergedDatum =
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(PreviousRawDatum >> ObjDesc->Field.BitOffset) |
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(ThisRawDatum << (BitGranularity - ObjDesc->Field.BitOffset));
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}
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else
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{
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MergedDatum = PreviousRawDatum;
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}
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/*
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* Prepare the merged datum for storing into the caller's
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* buffer. It is possible to have a 32-bit buffer
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* (ByteGranularity == 4), but a ObjDesc->Field.Length
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* of 8 or 16, meaning that the upper bytes of merged data
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* are undesired. This section fixes that.
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*/
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switch (ObjDesc->Field.Length)
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{
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case 8:
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MergedDatum &= 0x000000FF;
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break;
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case 16:
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MergedDatum &= 0x0000FFFF;
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break;
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}
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/*
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* Now store the datum in the caller's buffer, according to
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* the data type
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*/
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switch (ByteGranularity)
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{
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case 1:
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((UINT8 *) Buffer) [ThisFieldDatumOffset] = (UINT8) MergedDatum;
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break;
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case 2:
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MOVE_UNALIGNED16_TO_16 (&(((UINT16 *) Buffer) [ThisFieldDatumOffset]), &MergedDatum);
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break;
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case 4:
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MOVE_UNALIGNED32_TO_32 (&(((UINT32 *) Buffer) [ThisFieldDatumOffset]), &MergedDatum);
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break;
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}
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/*
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* Save the most recent datum since it contains bits of
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* the *next* field datum
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*/
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PreviousRawDatum = ThisRawDatum;
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ThisFieldByteOffset += ByteGranularity;
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ThisFieldDatumOffset++;
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} /* while */
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}
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Cleanup:
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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: AcpiAmlWriteFieldData
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*
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* PARAMETERS: *ObjDesc - Field to be set
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* Value - Value to store
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* FieldBitWidth - Field Width in bits (8, 16, or 32)
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*
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* RETURN: Status
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*
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* DESCRIPTION: Store the value into the given field
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiAmlWriteFieldData (
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ACPI_OPERAND_OBJECT *ObjDesc,
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UINT32 FieldByteOffset,
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UINT32 FieldBitWidth,
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UINT32 Value)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_OPERAND_OBJECT *RgnDesc = NULL;
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ACPI_PHYSICAL_ADDRESS Address;
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UINT32 FieldByteWidth;
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FUNCTION_TRACE ("AmlWriteFieldData");
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|
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/* ObjDesc is validated by callers */
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if (ObjDesc)
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{
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RgnDesc = ObjDesc->Field.Container;
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}
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FieldByteWidth = DIV_8 (FieldBitWidth);
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Status = AcpiAmlSetupField (ObjDesc, RgnDesc, FieldBitWidth);
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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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* Set offset to next multiple of field width,
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* add region base address and offset within the field
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*/
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Address = RgnDesc->Region.Address +
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(ObjDesc->Field.Offset * FieldByteWidth) +
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FieldByteOffset;
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DEBUG_PRINT (TRACE_OPREGION,
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("AmlWriteField: Store %lx in Region %s(%X) at %p width %X\n",
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Value, AcpiCmGetRegionName (RgnDesc->Region.SpaceId),
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RgnDesc->Region.SpaceId, Address,
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FieldBitWidth));
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/* Invoke the appropriate AddressSpace/OpRegion handler */
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Status = AcpiEvAddressSpaceDispatch (RgnDesc, ADDRESS_SPACE_WRITE,
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Address, FieldBitWidth, &Value);
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if (Status == AE_NOT_IMPLEMENTED)
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{
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DEBUG_PRINT (ACPI_ERROR,
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("AmlWriteField: **** Region type %s(%X) not implemented\n",
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AcpiCmGetRegionName (RgnDesc->Region.SpaceId),
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RgnDesc->Region.SpaceId));
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}
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else if (Status == AE_NOT_EXIST)
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{
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DEBUG_PRINT (ACPI_ERROR,
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("AmlWriteField: **** Region type %s(%X) does not have a handler\n",
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AcpiCmGetRegionName (RgnDesc->Region.SpaceId),
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RgnDesc->Region.SpaceId));
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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: AcpiAmlWriteFieldDataWithUpdateRule
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*
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* PARAMETERS: *ObjDesc - Field to be set
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* Value - Value to store
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* FieldBitWidth - Field Width in bits (8, 16, or 32)
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*
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* RETURN: Status
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*
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* DESCRIPTION: Apply the field update rule to a field write
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*
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****************************************************************************/
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static ACPI_STATUS
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AcpiAmlWriteFieldDataWithUpdateRule (
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|
ACPI_OPERAND_OBJECT *ObjDesc,
|
|
UINT32 Mask,
|
|
UINT32 FieldValue,
|
|
UINT32 ThisFieldByteOffset,
|
|
UINT32 BitGranularity)
|
|
{
|
|
ACPI_STATUS Status = AE_OK;
|
|
UINT32 MergedValue;
|
|
UINT32 CurrentValue;
|
|
|
|
|
|
/* Start with the new bits */
|
|
|
|
MergedValue = FieldValue;
|
|
|
|
|
|
|
|
/* Decode the update rule */
|
|
|
|
switch (ObjDesc->Field.UpdateRule)
|
|
{
|
|
|
|
case UPDATE_PRESERVE:
|
|
|
|
/* Check if update rule needs to be applied (not if mask is all ones) */
|
|
|
|
/* The left shift drops the bits we want to ignore. */
|
|
if ((~Mask << (sizeof(Mask)*8 - BitGranularity)) != 0)
|
|
{
|
|
/*
|
|
* Read the current contents of the byte/word/dword containing
|
|
* the field, and merge with the new field value.
|
|
*/
|
|
Status = AcpiAmlReadFieldData (ObjDesc, ThisFieldByteOffset,
|
|
BitGranularity, &CurrentValue);
|
|
MergedValue |= (CurrentValue & ~Mask);
|
|
}
|
|
break;
|
|
|
|
|
|
case UPDATE_WRITE_AS_ONES:
|
|
|
|
/* Set positions outside the field to all ones */
|
|
|
|
MergedValue |= ~Mask;
|
|
break;
|
|
|
|
|
|
case UPDATE_WRITE_AS_ZEROS:
|
|
|
|
/* Set positions outside the field to all zeros */
|
|
|
|
MergedValue &= Mask;
|
|
break;
|
|
|
|
|
|
default:
|
|
DEBUG_PRINT (ACPI_ERROR,
|
|
("WriteFieldDataWithUpdateRule: Unknown UpdateRule setting: %x\n",
|
|
ObjDesc->Field.UpdateRule));
|
|
Status = AE_AML_OPERAND_VALUE;
|
|
}
|
|
|
|
|
|
/* Write the merged value */
|
|
|
|
if (ACPI_SUCCESS (Status))
|
|
{
|
|
Status = AcpiAmlWriteFieldData (ObjDesc, ThisFieldByteOffset,
|
|
BitGranularity, MergedValue);
|
|
}
|
|
|
|
return (Status);
|
|
}
|
|
|
|
|
|
/*****************************************************************************
|
|
*
|
|
* FUNCTION: AcpiAmlWriteField
|
|
*
|
|
* PARAMETERS: *ObjDesc - Field to be set
|
|
* Value - Value to store
|
|
* FieldBitWidth - Field Width in bits (8, 16, or 32)
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Store the value into the given field
|
|
*
|
|
****************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiAmlWriteField (
|
|
ACPI_OPERAND_OBJECT *ObjDesc,
|
|
void *Buffer,
|
|
UINT32 BufferLength,
|
|
UINT32 ByteLength,
|
|
UINT32 DatumLength,
|
|
UINT32 BitGranularity,
|
|
UINT32 ByteGranularity)
|
|
{
|
|
ACPI_STATUS Status;
|
|
UINT32 ThisFieldByteOffset;
|
|
UINT32 ThisFieldDatumOffset;
|
|
UINT32 Mask;
|
|
UINT32 MergedDatum;
|
|
UINT32 PreviousRawDatum;
|
|
UINT32 ThisRawDatum;
|
|
UINT32 FieldValue;
|
|
UINT32 ValidFieldBits;
|
|
|
|
|
|
FUNCTION_TRACE ("AmlWriteField");
|
|
|
|
|
|
/*
|
|
* Break the request into up to three parts:
|
|
* non-aligned part at start, aligned part in middle, non-aligned part
|
|
* at end --- Just like an I/O request ---
|
|
*/
|
|
|
|
ThisFieldByteOffset = 0;
|
|
ThisFieldDatumOffset= 0;
|
|
|
|
/* Get a datum */
|
|
|
|
switch (ByteGranularity)
|
|
{
|
|
case 1:
|
|
PreviousRawDatum = ((UINT8 *) Buffer) [ThisFieldDatumOffset];
|
|
break;
|
|
|
|
case 2:
|
|
MOVE_UNALIGNED16_TO_32 (&PreviousRawDatum, &(((UINT16 *) Buffer) [ThisFieldDatumOffset]));
|
|
break;
|
|
|
|
case 4:
|
|
MOVE_UNALIGNED32_TO_32 (&PreviousRawDatum, &(((UINT32 *) Buffer) [ThisFieldDatumOffset]));
|
|
break;
|
|
|
|
default:
|
|
DEBUG_PRINT (ACPI_ERROR, ("AmlWriteField: Invalid granularity: %x\n",
|
|
ByteGranularity));
|
|
Status = AE_AML_OPERAND_VALUE;
|
|
goto Cleanup;
|
|
}
|
|
|
|
|
|
/*
|
|
* Write a partial field datum if field does not begin on a datum boundary
|
|
*
|
|
* Construct Mask with 1 bits where the field is, 0 bits elsewhere
|
|
*
|
|
* 1) Bits above the field
|
|
*/
|
|
|
|
Mask = (((UINT32)(-1)) << (UINT32)ObjDesc->Field.BitOffset);
|
|
|
|
/* 2) Only the bottom 5 bits are valid for a shift operation. */
|
|
|
|
if ((ObjDesc->Field.BitOffset + ObjDesc->FieldUnit.Length) < 32)
|
|
{
|
|
/* Bits above the field */
|
|
|
|
Mask &= (~(((UINT32)(-1)) << ((UINT32)ObjDesc->Field.BitOffset +
|
|
(UINT32)ObjDesc->FieldUnit.Length)));
|
|
}
|
|
|
|
/* 3) Shift and mask the value into the field position */
|
|
|
|
FieldValue = (PreviousRawDatum << ObjDesc->Field.BitOffset) & Mask;
|
|
|
|
Status = AcpiAmlWriteFieldDataWithUpdateRule (ObjDesc, Mask, FieldValue,
|
|
ThisFieldByteOffset,
|
|
BitGranularity);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto Cleanup;
|
|
}
|
|
|
|
|
|
/* If the field fits within one datum, we are done. */
|
|
|
|
if ((DatumLength == 1) &&
|
|
((ObjDesc->Field.BitOffset + ObjDesc->FieldUnit.Length) <=
|
|
(UINT16) BitGranularity))
|
|
{
|
|
goto Cleanup;
|
|
}
|
|
|
|
/*
|
|
* We don't need to worry about the update rule for these data, because
|
|
* all of the bits are part of the field.
|
|
*
|
|
* Can't write the last datum, however, because it might contain bits that
|
|
* are not part of the field -- the update rule must be applied.
|
|
*/
|
|
|
|
while (ThisFieldDatumOffset < (DatumLength - 1))
|
|
{
|
|
ThisFieldDatumOffset++;
|
|
|
|
/* Get the next raw datum, it contains bits of the current field datum... */
|
|
|
|
switch (ByteGranularity)
|
|
{
|
|
case 1:
|
|
ThisRawDatum = ((UINT8 *) Buffer) [ThisFieldDatumOffset];
|
|
break;
|
|
|
|
case 2:
|
|
MOVE_UNALIGNED16_TO_32 (&ThisRawDatum, &(((UINT16 *) Buffer) [ThisFieldDatumOffset]));
|
|
break;
|
|
|
|
case 4:
|
|
MOVE_UNALIGNED32_TO_32 (&ThisRawDatum, &(((UINT32 *) Buffer) [ThisFieldDatumOffset]));
|
|
break;
|
|
|
|
default:
|
|
DEBUG_PRINT (ACPI_ERROR, ("AmlWriteField: Invalid Byte Granularity: %x\n",
|
|
ByteGranularity));
|
|
Status = AE_AML_OPERAND_VALUE;
|
|
goto Cleanup;
|
|
}
|
|
|
|
/*
|
|
* Put together bits of the two raw data to make a complete field
|
|
* datum
|
|
*/
|
|
|
|
if (ObjDesc->Field.BitOffset != 0)
|
|
{
|
|
MergedDatum =
|
|
(PreviousRawDatum >> (BitGranularity - ObjDesc->Field.BitOffset)) |
|
|
(ThisRawDatum << ObjDesc->Field.BitOffset);
|
|
}
|
|
|
|
else
|
|
{
|
|
MergedDatum = ThisRawDatum;
|
|
}
|
|
|
|
/* Now write the completed datum */
|
|
|
|
|
|
Status = AcpiAmlWriteFieldData (ObjDesc,
|
|
ThisFieldByteOffset + ByteGranularity,
|
|
BitGranularity, MergedDatum);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto Cleanup;
|
|
}
|
|
|
|
|
|
/*
|
|
* Save the most recent datum since it contains bits of
|
|
* the *next* field datum
|
|
*/
|
|
|
|
PreviousRawDatum = ThisRawDatum;
|
|
|
|
ThisFieldByteOffset += ByteGranularity;
|
|
|
|
} /* while */
|
|
|
|
|
|
/* Write a partial field datum if field does not end on a datum boundary */
|
|
|
|
if ((ObjDesc->FieldUnit.Length + ObjDesc->FieldUnit.BitOffset) %
|
|
BitGranularity)
|
|
{
|
|
switch (ByteGranularity)
|
|
{
|
|
case 1:
|
|
ThisRawDatum = ((UINT8 *) Buffer) [ThisFieldDatumOffset];
|
|
break;
|
|
|
|
case 2:
|
|
MOVE_UNALIGNED16_TO_32 (&ThisRawDatum, &(((UINT16 *) Buffer) [ThisFieldDatumOffset]));
|
|
break;
|
|
|
|
case 4:
|
|
MOVE_UNALIGNED32_TO_32 (&ThisRawDatum, &(((UINT32 *) Buffer) [ThisFieldDatumOffset]));
|
|
break;
|
|
}
|
|
|
|
/* Construct Mask with 1 bits where the field is, 0 bits elsewhere */
|
|
|
|
ValidFieldBits = ((ObjDesc->FieldUnit.Length % BitGranularity) +
|
|
ObjDesc->Field.BitOffset);
|
|
|
|
Mask = (((UINT32) 1 << ValidFieldBits) - (UINT32) 1);
|
|
|
|
/* Shift and mask the value into the field position */
|
|
|
|
FieldValue = (PreviousRawDatum >>
|
|
(BitGranularity - ObjDesc->Field.BitOffset)) & Mask;
|
|
|
|
Status = AcpiAmlWriteFieldDataWithUpdateRule (ObjDesc, Mask, FieldValue,
|
|
ThisFieldByteOffset + ByteGranularity,
|
|
BitGranularity);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto Cleanup;
|
|
}
|
|
}
|
|
|
|
|
|
Cleanup:
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|