1164 lines
39 KiB
C
1164 lines
39 KiB
C
/******************************************************************************
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*
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* Module Name: exfldio - Aml Field I/O
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* $Revision: 82 $
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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 - 2002, 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 __EXFLDIO_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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#include "acdispat.h"
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME ("exfldio")
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/*******************************************************************************
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*
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* FUNCTION: AcpiExSetupRegion
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*
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* PARAMETERS: *ObjDesc - Field to be read or written
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* FieldDatumByteOffset - Byte offset of this datum within the
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* parent field
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*
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* RETURN: Status
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*
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* DESCRIPTION: Common processing for AcpiExExtractFromField and
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* AcpiExInsertIntoField. Initialize the
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExSetupRegion (
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ACPI_OPERAND_OBJECT *ObjDesc,
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UINT32 FieldDatumByteOffset)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_OPERAND_OBJECT *RgnDesc;
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ACPI_FUNCTION_TRACE_U32 ("ExSetupRegion", FieldDatumByteOffset);
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RgnDesc = ObjDesc->CommonField.RegionObj;
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if (ACPI_TYPE_REGION != RgnDesc->Common.Type)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Needed Region, found type %x %s\n",
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RgnDesc->Common.Type, AcpiUtGetTypeName (RgnDesc->Common.Type)));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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/*
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* If the Region Address and Length 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 (!(RgnDesc->Region.Flags & AOPOBJ_DATA_VALID))
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{
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Status = AcpiDsGetRegionArguments (RgnDesc);
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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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* Validate the request. The entire request from the byte offset for a
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* length of one field datum (access width) must fit within the region.
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* (Region length is specified in bytes)
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*/
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if (RgnDesc->Region.Length < (ObjDesc->CommonField.BaseByteOffset
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+ FieldDatumByteOffset
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+ ObjDesc->CommonField.AccessByteWidth))
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{
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if (RgnDesc->Region.Length < ObjDesc->CommonField.AccessByteWidth)
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{
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/*
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* This is the case where the AccessType (AccWord, etc.) is wider
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* than the region itself. For example, a region of length one
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* byte, and a field with Dword access specified.
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*/
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Field [%4.4s] access width (%d bytes) too large for region [%4.4s] (length %X)\n",
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(char *) &ObjDesc->CommonField.Node->Name, ObjDesc->CommonField.AccessByteWidth,
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(char *) &RgnDesc->Region.Node->Name, RgnDesc->Region.Length));
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}
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/*
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* Offset rounded up to next multiple of field width
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* exceeds region length, indicate an error
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*/
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Field [%4.4s] Base+Offset+Width %X+%X+%X is beyond end of region [%4.4s] (length %X)\n",
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(char *) &ObjDesc->CommonField.Node->Name, ObjDesc->CommonField.BaseByteOffset,
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FieldDatumByteOffset, ObjDesc->CommonField.AccessByteWidth,
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(char *) &RgnDesc->Region.Node->Name, RgnDesc->Region.Length));
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return_ACPI_STATUS (AE_AML_REGION_LIMIT);
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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: AcpiExAccessRegion
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*
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* PARAMETERS: *ObjDesc - Field to be read
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* FieldDatumByteOffset - Byte offset of this datum within the
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* parent field
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* *Value - Where to store value (must be 32 bits)
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* ReadWrite - Read or Write flag
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*
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* RETURN: Status
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*
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* DESCRIPTION: Read or Write a single field datum to an Operation Region.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiExAccessRegion (
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ACPI_OPERAND_OBJECT *ObjDesc,
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UINT32 FieldDatumByteOffset,
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ACPI_INTEGER *Value,
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UINT32 ReadWrite)
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{
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ACPI_STATUS Status;
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ACPI_OPERAND_OBJECT *RgnDesc;
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ACPI_PHYSICAL_ADDRESS Address;
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ACPI_FUNCTION_TRACE ("AcpiExAccessRegion");
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/*
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* The physical address of this field datum is:
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*
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* 1) The base of the region, plus
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* 2) The base offset of the field, plus
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* 3) The current offset into the field
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*/
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RgnDesc = ObjDesc->CommonField.RegionObj;
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Address = RgnDesc->Region.Address
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+ ObjDesc->CommonField.BaseByteOffset
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+ FieldDatumByteOffset;
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if (ReadWrite == ACPI_READ)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "[READ]"));
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}
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else
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "[WRITE]"));
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}
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ACPI_DEBUG_PRINT_RAW ((ACPI_DB_BFIELD,
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" Region[%s-%X] Access %X Base:Off %X:%X at %8.8X%8.8X\n",
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AcpiUtGetRegionName (RgnDesc->Region.SpaceId),
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RgnDesc->Region.SpaceId,
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ObjDesc->CommonField.AccessByteWidth,
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ObjDesc->CommonField.BaseByteOffset,
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FieldDatumByteOffset,
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ACPI_HIDWORD (Address), ACPI_LODWORD (Address)));
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/* Invoke the appropriate AddressSpace/OpRegion handler */
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Status = AcpiEvAddressSpaceDispatch (RgnDesc, ReadWrite,
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Address, ACPI_MUL_8 (ObjDesc->CommonField.AccessByteWidth), Value);
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if (ACPI_FAILURE (Status))
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{
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if (Status == AE_NOT_IMPLEMENTED)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Region %s(%X) not implemented\n",
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AcpiUtGetRegionName (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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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Region %s(%X) has no handler\n",
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AcpiUtGetRegionName (RgnDesc->Region.SpaceId),
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RgnDesc->Region.SpaceId));
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}
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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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*
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* FUNCTION: AcpiExRegisterOverflow
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*
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* PARAMETERS: *ObjDesc - Register(Field) to be written
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* Value - Value to be stored
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*
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* RETURN: TRUE if value overflows the field, FALSE otherwise
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*
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* DESCRIPTION: Check if a value is out of range of the field being written.
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* Used to check if the values written to Index and Bank registers
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* are out of range. Normally, the value is simply truncated
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* to fit the field, but this case is most likely a serious
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* coding error in the ASL.
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*
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******************************************************************************/
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BOOLEAN
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AcpiExRegisterOverflow (
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ACPI_OPERAND_OBJECT *ObjDesc,
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ACPI_INTEGER Value)
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{
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if (ObjDesc->CommonField.BitLength >= ACPI_INTEGER_BIT_SIZE)
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{
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/*
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* The field is large enough to hold the maximum integer, so we can
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* never overflow it.
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*/
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return (FALSE);
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}
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if (Value >= (ACPI_INTEGER) (1 << ObjDesc->CommonField.BitLength))
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{
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/*
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* The Value is larger than the maximum value that can fit into
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* the register.
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*/
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return (TRUE);
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}
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|
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/* The Value will fit into the field with no truncation */
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return (FALSE);
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}
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|
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/*******************************************************************************
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*
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* FUNCTION: AcpiExFieldDatumIo
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*
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* PARAMETERS: *ObjDesc - Field to be read
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* FieldDatumByteOffset - Byte offset of this datum within the
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* parent field
|
|
* *Value - Where to store value (must be 64 bits)
|
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* ReadWrite - Read or Write flag
|
|
*
|
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* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Read or Write a single datum of a field. The FieldType is
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* demultiplexed here to handle the different types of fields
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* (BufferField, RegionField, IndexField, BankField)
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*
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******************************************************************************/
|
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ACPI_STATUS
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AcpiExFieldDatumIo (
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ACPI_OPERAND_OBJECT *ObjDesc,
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UINT32 FieldDatumByteOffset,
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ACPI_INTEGER *Value,
|
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UINT32 ReadWrite)
|
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{
|
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ACPI_STATUS Status;
|
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ACPI_INTEGER LocalValue;
|
|
|
|
|
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ACPI_FUNCTION_TRACE_U32 ("ExFieldDatumIo", FieldDatumByteOffset);
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|
|
|
|
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if (ReadWrite == ACPI_READ)
|
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{
|
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if (!Value)
|
|
{
|
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LocalValue = 0;
|
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Value = &LocalValue; /* To support reads without saving return value */
|
|
}
|
|
|
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/* Clear the entire return buffer first, [Very Important!] */
|
|
|
|
*Value = 0;
|
|
}
|
|
|
|
/*
|
|
* The four types of fields are:
|
|
*
|
|
* BufferFields - Read/write from/to a Buffer
|
|
* RegionFields - Read/write from/to a Operation Region.
|
|
* BankFields - Write to a Bank Register, then read/write from/to an OpRegion
|
|
* IndexFields - Write to an Index Register, then read/write from/to a Data Register
|
|
*/
|
|
switch (ObjDesc->Common.Type)
|
|
{
|
|
case ACPI_TYPE_BUFFER_FIELD:
|
|
/*
|
|
* If the BufferField arguments have not been previously evaluated,
|
|
* evaluate them now and save the results.
|
|
*/
|
|
if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID))
|
|
{
|
|
Status = AcpiDsGetBufferFieldArguments (ObjDesc);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
}
|
|
|
|
if (ReadWrite == ACPI_READ)
|
|
{
|
|
/*
|
|
* Copy the data from the source buffer.
|
|
* Length is the field width in bytes.
|
|
*/
|
|
ACPI_MEMCPY (Value, (ObjDesc->BufferField.BufferObj)->Buffer.Pointer
|
|
+ ObjDesc->BufferField.BaseByteOffset
|
|
+ FieldDatumByteOffset,
|
|
ObjDesc->CommonField.AccessByteWidth);
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* Copy the data to the target buffer.
|
|
* Length is the field width in bytes.
|
|
*/
|
|
ACPI_MEMCPY ((ObjDesc->BufferField.BufferObj)->Buffer.Pointer
|
|
+ ObjDesc->BufferField.BaseByteOffset
|
|
+ FieldDatumByteOffset,
|
|
Value, ObjDesc->CommonField.AccessByteWidth);
|
|
}
|
|
|
|
Status = AE_OK;
|
|
break;
|
|
|
|
|
|
case INTERNAL_TYPE_BANK_FIELD:
|
|
|
|
/* Ensure that the BankValue is not beyond the capacity of the register */
|
|
|
|
if (AcpiExRegisterOverflow (ObjDesc->BankField.BankObj,
|
|
ObjDesc->BankField.Value))
|
|
{
|
|
return_ACPI_STATUS (AE_AML_REGISTER_LIMIT);
|
|
}
|
|
|
|
/*
|
|
* For BankFields, we must write the BankValue to the BankRegister
|
|
* (itself a RegionField) before we can access the data.
|
|
*/
|
|
Status = AcpiExInsertIntoField (ObjDesc->BankField.BankObj,
|
|
&ObjDesc->BankField.Value,
|
|
sizeof (ObjDesc->BankField.Value));
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/*
|
|
* Now that the Bank has been selected, fall through to the
|
|
* RegionField case and write the datum to the Operation Region
|
|
*/
|
|
|
|
/* No break; ! */
|
|
|
|
|
|
case INTERNAL_TYPE_REGION_FIELD:
|
|
/*
|
|
* For simple RegionFields, we just directly access the owning
|
|
* Operation Region.
|
|
*/
|
|
Status = AcpiExSetupRegion (ObjDesc, FieldDatumByteOffset);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
Status = AcpiExAccessRegion (ObjDesc, FieldDatumByteOffset, Value,
|
|
ReadWrite);
|
|
break;
|
|
|
|
|
|
case INTERNAL_TYPE_INDEX_FIELD:
|
|
|
|
|
|
/* Ensure that the IndexValue is not beyond the capacity of the register */
|
|
|
|
if (AcpiExRegisterOverflow (ObjDesc->IndexField.IndexObj,
|
|
ObjDesc->IndexField.Value))
|
|
{
|
|
return_ACPI_STATUS (AE_AML_REGISTER_LIMIT);
|
|
}
|
|
|
|
/* Write the index value to the IndexRegister (itself a RegionField) */
|
|
|
|
Status = AcpiExInsertIntoField (ObjDesc->IndexField.IndexObj,
|
|
&ObjDesc->IndexField.Value,
|
|
sizeof (ObjDesc->IndexField.Value));
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
if (ReadWrite == ACPI_READ)
|
|
{
|
|
/* Read the datum from the DataRegister */
|
|
|
|
Status = AcpiExExtractFromField (ObjDesc->IndexField.DataObj,
|
|
Value, ObjDesc->CommonField.AccessByteWidth);
|
|
}
|
|
else
|
|
{
|
|
/* Write the datum to the Data register */
|
|
|
|
Status = AcpiExInsertIntoField (ObjDesc->IndexField.DataObj,
|
|
Value, ObjDesc->CommonField.AccessByteWidth);
|
|
}
|
|
break;
|
|
|
|
|
|
default:
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "%p, Wrong object type - %s\n",
|
|
ObjDesc, AcpiUtGetTypeName (ObjDesc->Common.Type)));
|
|
Status = AE_AML_INTERNAL;
|
|
break;
|
|
}
|
|
|
|
if (ACPI_SUCCESS (Status))
|
|
{
|
|
if (ReadWrite == ACPI_READ)
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "Value Read=%8.8X%8.8X\n",
|
|
ACPI_HIDWORD (*Value), ACPI_LODWORD (*Value)));
|
|
}
|
|
else
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "Value Written=%8.8X%8.8X\n",
|
|
ACPI_HIDWORD (*Value), ACPI_LODWORD (*Value)));
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiExWriteWithUpdateRule
|
|
*
|
|
* PARAMETERS: *ObjDesc - Field to be set
|
|
* Value - Value to store
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Apply the field update rule to a field write
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiExWriteWithUpdateRule (
|
|
ACPI_OPERAND_OBJECT *ObjDesc,
|
|
ACPI_INTEGER Mask,
|
|
ACPI_INTEGER FieldValue,
|
|
UINT32 FieldDatumByteOffset)
|
|
{
|
|
ACPI_STATUS Status = AE_OK;
|
|
ACPI_INTEGER MergedValue;
|
|
ACPI_INTEGER CurrentValue;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_U32 ("ExWriteWithUpdateRule", Mask);
|
|
|
|
|
|
/* Start with the new bits */
|
|
|
|
MergedValue = FieldValue;
|
|
|
|
/* If the mask is all ones, we don't need to worry about the update rule */
|
|
|
|
if (Mask != ACPI_UINT32_MAX)
|
|
{
|
|
/* Decode the update rule */
|
|
|
|
switch (ObjDesc->CommonField.FieldFlags & AML_FIELD_UPDATE_RULE_MASK)
|
|
{
|
|
case AML_FIELD_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 << (ACPI_MUL_8 (sizeof (Mask)) -
|
|
ACPI_MUL_8 (ObjDesc->CommonField.AccessByteWidth))) != 0)
|
|
{
|
|
/*
|
|
* Read the current contents of the byte/word/dword containing
|
|
* the field, and merge with the new field value.
|
|
*/
|
|
Status = AcpiExFieldDatumIo (ObjDesc, FieldDatumByteOffset,
|
|
&CurrentValue, ACPI_READ);
|
|
MergedValue |= (CurrentValue & ~Mask);
|
|
}
|
|
break;
|
|
|
|
case AML_FIELD_UPDATE_WRITE_AS_ONES:
|
|
|
|
/* Set positions outside the field to all ones */
|
|
|
|
MergedValue |= ~Mask;
|
|
break;
|
|
|
|
case AML_FIELD_UPDATE_WRITE_AS_ZEROS:
|
|
|
|
/* Set positions outside the field to all zeros */
|
|
|
|
MergedValue &= Mask;
|
|
break;
|
|
|
|
default:
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
|
"WriteWithUpdateRule: Unknown UpdateRule setting: %x\n",
|
|
(ObjDesc->CommonField.FieldFlags & AML_FIELD_UPDATE_RULE_MASK)));
|
|
return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
|
|
}
|
|
}
|
|
|
|
/* Write the merged value */
|
|
|
|
Status = AcpiExFieldDatumIo (ObjDesc, FieldDatumByteOffset,
|
|
&MergedValue, ACPI_WRITE);
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD,
|
|
"Mask %8.8X%8.8X DatumOffset %X Value %8.8X%8.8X, MergedValue %8.8X%8.8X\n",
|
|
ACPI_HIDWORD (Mask), ACPI_LODWORD (Mask),
|
|
FieldDatumByteOffset,
|
|
ACPI_HIDWORD (FieldValue), ACPI_LODWORD (FieldValue),
|
|
ACPI_HIDWORD (MergedValue),ACPI_LODWORD (MergedValue)));
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiExGetBufferDatum
|
|
*
|
|
* PARAMETERS: Datum - Where the Datum is returned
|
|
* Buffer - Raw field buffer
|
|
* ByteGranularity - 1/2/4/8 Granularity of the field
|
|
* (aka Datum Size)
|
|
* Offset - Datum offset into the buffer
|
|
*
|
|
* RETURN: none
|
|
*
|
|
* DESCRIPTION: Get a datum from the buffer according to the buffer field
|
|
* byte granularity
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
AcpiExGetBufferDatum(
|
|
ACPI_INTEGER *Datum,
|
|
void *Buffer,
|
|
UINT32 ByteGranularity,
|
|
UINT32 Offset)
|
|
{
|
|
|
|
ACPI_FUNCTION_ENTRY ();
|
|
|
|
|
|
switch (ByteGranularity)
|
|
{
|
|
case ACPI_FIELD_BYTE_GRANULARITY:
|
|
|
|
*Datum = ((UINT8 *) Buffer) [Offset];
|
|
break;
|
|
|
|
case ACPI_FIELD_WORD_GRANULARITY:
|
|
|
|
ACPI_MOVE_UNALIGNED16_TO_32 (Datum, &(((UINT16 *) Buffer) [Offset]));
|
|
break;
|
|
|
|
case ACPI_FIELD_DWORD_GRANULARITY:
|
|
|
|
ACPI_MOVE_UNALIGNED32_TO_32 (Datum, &(((UINT32 *) Buffer) [Offset]));
|
|
break;
|
|
|
|
case ACPI_FIELD_QWORD_GRANULARITY:
|
|
|
|
ACPI_MOVE_UNALIGNED64_TO_64 (Datum, &(((UINT64 *) Buffer) [Offset]));
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiExSetBufferDatum
|
|
*
|
|
* PARAMETERS: MergedDatum - Value to store
|
|
* Buffer - Receiving buffer
|
|
* ByteGranularity - 1/2/4/8 Granularity of the field
|
|
* (aka Datum Size)
|
|
* Offset - Datum offset into the buffer
|
|
*
|
|
* RETURN: none
|
|
*
|
|
* DESCRIPTION: Store the merged datum to the buffer according to the
|
|
* byte granularity
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
AcpiExSetBufferDatum (
|
|
ACPI_INTEGER MergedDatum,
|
|
void *Buffer,
|
|
UINT32 ByteGranularity,
|
|
UINT32 Offset)
|
|
{
|
|
|
|
ACPI_FUNCTION_ENTRY ();
|
|
|
|
|
|
switch (ByteGranularity)
|
|
{
|
|
case ACPI_FIELD_BYTE_GRANULARITY:
|
|
|
|
((UINT8 *) Buffer) [Offset] = (UINT8) MergedDatum;
|
|
break;
|
|
|
|
case ACPI_FIELD_WORD_GRANULARITY:
|
|
|
|
ACPI_MOVE_UNALIGNED16_TO_16 (&(((UINT16 *) Buffer)[Offset]), &MergedDatum);
|
|
break;
|
|
|
|
case ACPI_FIELD_DWORD_GRANULARITY:
|
|
|
|
ACPI_MOVE_UNALIGNED32_TO_32 (&(((UINT32 *) Buffer)[Offset]), &MergedDatum);
|
|
break;
|
|
|
|
case ACPI_FIELD_QWORD_GRANULARITY:
|
|
|
|
ACPI_MOVE_UNALIGNED64_TO_64 (&(((UINT64 *) Buffer)[Offset]), &MergedDatum);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiExExtractFromField
|
|
*
|
|
* PARAMETERS: *ObjDesc - Field to be read
|
|
* *Value - Where to store value
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Retrieve the value of the given field
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiExExtractFromField (
|
|
ACPI_OPERAND_OBJECT *ObjDesc,
|
|
void *Buffer,
|
|
UINT32 BufferLength)
|
|
{
|
|
ACPI_STATUS Status;
|
|
UINT32 FieldDatumByteOffset;
|
|
UINT32 DatumOffset;
|
|
ACPI_INTEGER PreviousRawDatum;
|
|
ACPI_INTEGER ThisRawDatum = 0;
|
|
ACPI_INTEGER MergedDatum = 0;
|
|
UINT32 ByteFieldLength;
|
|
UINT32 DatumCount;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("ExExtractFromField");
|
|
|
|
|
|
/*
|
|
* The field must fit within the caller's buffer
|
|
*/
|
|
ByteFieldLength = ACPI_ROUND_BITS_UP_TO_BYTES (ObjDesc->CommonField.BitLength);
|
|
if (ByteFieldLength > BufferLength)
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
|
|
"Field size %X (bytes) too large for buffer (%X)\n",
|
|
ByteFieldLength, BufferLength));
|
|
|
|
return_ACPI_STATUS (AE_BUFFER_OVERFLOW);
|
|
}
|
|
|
|
/* Convert field byte count to datum count, round up if necessary */
|
|
|
|
DatumCount = ACPI_ROUND_UP_TO (ByteFieldLength,
|
|
ObjDesc->CommonField.AccessByteWidth);
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
|
|
"ByteLen=%x, DatumLen=%x, ByteGran=%x\n",
|
|
ByteFieldLength, DatumCount,ObjDesc->CommonField.AccessByteWidth));
|
|
|
|
/*
|
|
* Clear the caller's buffer (the whole buffer length as given)
|
|
* This is very important, especially in the cases where a byte is read,
|
|
* but the buffer is really a UINT32 (4 bytes).
|
|
*/
|
|
ACPI_MEMSET (Buffer, 0, BufferLength);
|
|
|
|
/* Read the first raw datum to prime the loop */
|
|
|
|
FieldDatumByteOffset = 0;
|
|
DatumOffset= 0;
|
|
|
|
Status = AcpiExFieldDatumIo (ObjDesc, FieldDatumByteOffset,
|
|
&PreviousRawDatum, ACPI_READ);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/* We might actually be done if the request fits in one datum */
|
|
|
|
if ((DatumCount == 1) &&
|
|
(ObjDesc->CommonField.Flags & AOPOBJ_SINGLE_DATUM))
|
|
{
|
|
/* 1) Shift the valid data bits down to start at bit 0 */
|
|
|
|
MergedDatum = (PreviousRawDatum >> ObjDesc->CommonField.StartFieldBitOffset);
|
|
|
|
/* 2) Mask off any upper unused bits (bits not part of the field) */
|
|
|
|
if (ObjDesc->CommonField.EndBufferValidBits)
|
|
{
|
|
MergedDatum &= ACPI_MASK_BITS_ABOVE (ObjDesc->CommonField.EndBufferValidBits);
|
|
}
|
|
|
|
/* Store the datum to the caller buffer */
|
|
|
|
AcpiExSetBufferDatum (MergedDatum, Buffer, ObjDesc->CommonField.AccessByteWidth,
|
|
DatumOffset);
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/* We need to get more raw data to complete one or more field data */
|
|
|
|
while (DatumOffset < DatumCount)
|
|
{
|
|
FieldDatumByteOffset += ObjDesc->CommonField.AccessByteWidth;
|
|
|
|
/*
|
|
* If the field is aligned on a byte boundary, we don't want
|
|
* to perform a final read, since this would potentially read
|
|
* past the end of the region.
|
|
*
|
|
* We could just split the aligned and non-aligned cases since the
|
|
* aligned case is so very simple, but this would require more code.
|
|
*/
|
|
if ((ObjDesc->CommonField.StartFieldBitOffset != 0) ||
|
|
((ObjDesc->CommonField.StartFieldBitOffset == 0) &&
|
|
(DatumOffset < (DatumCount -1))))
|
|
{
|
|
/*
|
|
* Get the next raw datum, it contains some or all bits
|
|
* of the current field datum
|
|
*/
|
|
Status = AcpiExFieldDatumIo (ObjDesc, FieldDatumByteOffset,
|
|
&ThisRawDatum, ACPI_READ);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Create the (possibly) merged datum to be stored to the caller buffer
|
|
*/
|
|
if (ObjDesc->CommonField.StartFieldBitOffset == 0)
|
|
{
|
|
/* Field is not skewed and we can just copy the datum */
|
|
|
|
MergedDatum = PreviousRawDatum;
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* Put together the appropriate bits of the two raw data to make a
|
|
* single complete field datum
|
|
*
|
|
* 1) Normalize the first datum down to bit 0
|
|
*/
|
|
MergedDatum = (PreviousRawDatum >> ObjDesc->CommonField.StartFieldBitOffset);
|
|
|
|
/* 2) Insert the second datum "above" the first datum */
|
|
|
|
MergedDatum |= (ThisRawDatum << ObjDesc->CommonField.DatumValidBits);
|
|
|
|
if ((DatumOffset >= (DatumCount -1)))
|
|
{
|
|
/*
|
|
* This is the last iteration of the loop. We need to clear
|
|
* any unused bits (bits that are not part of this field) that
|
|
* came from the last raw datum before we store the final
|
|
* merged datum into the caller buffer.
|
|
*/
|
|
if (ObjDesc->CommonField.EndBufferValidBits)
|
|
{
|
|
MergedDatum &=
|
|
ACPI_MASK_BITS_ABOVE (ObjDesc->CommonField.EndBufferValidBits);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Store the merged field datum in the caller's buffer, according to
|
|
* the granularity of the field (size of each datum).
|
|
*/
|
|
AcpiExSetBufferDatum (MergedDatum, Buffer,
|
|
ObjDesc->CommonField.AccessByteWidth, DatumOffset);
|
|
|
|
/*
|
|
* Save the raw datum that was just acquired since it may contain bits
|
|
* of the *next* field datum. Update offsets
|
|
*/
|
|
PreviousRawDatum = ThisRawDatum;
|
|
DatumOffset++;
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiExInsertIntoField
|
|
*
|
|
* PARAMETERS: *ObjDesc - Field to be set
|
|
* Buffer - Value to store
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Store the value into the given field
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiExInsertIntoField (
|
|
ACPI_OPERAND_OBJECT *ObjDesc,
|
|
void *Buffer,
|
|
UINT32 BufferLength)
|
|
{
|
|
ACPI_STATUS Status;
|
|
UINT32 FieldDatumByteOffset;
|
|
UINT32 DatumOffset;
|
|
ACPI_INTEGER Mask;
|
|
ACPI_INTEGER MergedDatum;
|
|
ACPI_INTEGER PreviousRawDatum;
|
|
ACPI_INTEGER ThisRawDatum;
|
|
UINT32 ByteFieldLength;
|
|
UINT32 DatumCount;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("ExInsertIntoField");
|
|
|
|
|
|
/*
|
|
* Incoming buffer must be at least as long as the field, we do not
|
|
* allow "partial" field writes. We do not care if the buffer is
|
|
* larger than the field, this typically happens when an integer is
|
|
* written to a field that is actually smaller than an integer.
|
|
*/
|
|
ByteFieldLength = ACPI_ROUND_BITS_UP_TO_BYTES (ObjDesc->CommonField.BitLength);
|
|
if (BufferLength < ByteFieldLength)
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Buffer length %X too small for field %X\n",
|
|
BufferLength, ByteFieldLength));
|
|
|
|
return_ACPI_STATUS (AE_BUFFER_OVERFLOW);
|
|
}
|
|
|
|
/* Convert byte count to datum count, round up if necessary */
|
|
|
|
DatumCount = ACPI_ROUND_UP_TO (ByteFieldLength, ObjDesc->CommonField.AccessByteWidth);
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
|
|
"ByteLen=%x, DatumLen=%x, ByteGran=%x\n",
|
|
ByteFieldLength, DatumCount, ObjDesc->CommonField.AccessByteWidth));
|
|
|
|
/*
|
|
* Break the request into up to three parts (similar to an I/O request):
|
|
* 1) non-aligned part at start
|
|
* 2) aligned part in middle
|
|
* 3) non-aligned part at the end
|
|
*/
|
|
FieldDatumByteOffset = 0;
|
|
DatumOffset= 0;
|
|
|
|
/* Get a single datum from the caller's buffer */
|
|
|
|
AcpiExGetBufferDatum (&PreviousRawDatum, Buffer,
|
|
ObjDesc->CommonField.AccessByteWidth, DatumOffset);
|
|
|
|
/*
|
|
* Part1:
|
|
* Write a partial field datum if field does not begin on a datum boundary
|
|
* Note: The code in this section also handles the aligned case
|
|
*
|
|
* Construct Mask with 1 bits where the field is, 0 bits elsewhere
|
|
* (Only the bottom 5 bits of BitLength are valid for a shift operation)
|
|
*
|
|
* Mask off bits that are "below" the field (if any)
|
|
*/
|
|
Mask = ACPI_MASK_BITS_BELOW (ObjDesc->CommonField.StartFieldBitOffset);
|
|
|
|
/* If the field fits in one datum, may need to mask upper bits */
|
|
|
|
if ((ObjDesc->CommonField.Flags & AOPOBJ_SINGLE_DATUM) &&
|
|
ObjDesc->CommonField.EndFieldValidBits)
|
|
{
|
|
/* There are bits above the field, mask them off also */
|
|
|
|
Mask &= ACPI_MASK_BITS_ABOVE (ObjDesc->CommonField.EndFieldValidBits);
|
|
}
|
|
|
|
/* Shift and mask the value into the field position */
|
|
|
|
MergedDatum = (PreviousRawDatum << ObjDesc->CommonField.StartFieldBitOffset);
|
|
MergedDatum &= Mask;
|
|
|
|
/* Apply the update rule (if necessary) and write the datum to the field */
|
|
|
|
Status = AcpiExWriteWithUpdateRule (ObjDesc, Mask, MergedDatum,
|
|
FieldDatumByteOffset);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* If the entire field fits within one datum, we are done. */
|
|
|
|
if ((DatumCount == 1) &&
|
|
(ObjDesc->CommonField.Flags & AOPOBJ_SINGLE_DATUM))
|
|
{
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
/*
|
|
* Part2:
|
|
* Write the aligned data.
|
|
*
|
|
* We don't need to worry about the update rule for these data, because
|
|
* all of the bits in each datum are part of the field.
|
|
*
|
|
* The last datum must be special cased because it might contain bits
|
|
* that are not part of the field -- therefore the "update rule" must be
|
|
* applied in Part3 below.
|
|
*/
|
|
while (DatumOffset < DatumCount)
|
|
{
|
|
DatumOffset++;
|
|
FieldDatumByteOffset += ObjDesc->CommonField.AccessByteWidth;
|
|
|
|
/*
|
|
* Get the next raw buffer datum. It may contain bits of the previous
|
|
* field datum
|
|
*/
|
|
AcpiExGetBufferDatum (&ThisRawDatum, Buffer,
|
|
ObjDesc->CommonField.AccessByteWidth, DatumOffset);
|
|
|
|
/* Create the field datum based on the field alignment */
|
|
|
|
if (ObjDesc->CommonField.StartFieldBitOffset != 0)
|
|
{
|
|
/*
|
|
* Put together appropriate bits of the two raw buffer data to make
|
|
* a single complete field datum
|
|
*/
|
|
MergedDatum =
|
|
(PreviousRawDatum >> ObjDesc->CommonField.DatumValidBits) |
|
|
(ThisRawDatum << ObjDesc->CommonField.StartFieldBitOffset);
|
|
}
|
|
else
|
|
{
|
|
/* Field began aligned on datum boundary */
|
|
|
|
MergedDatum = ThisRawDatum;
|
|
}
|
|
|
|
/*
|
|
* Special handling for the last datum if the field does NOT end on
|
|
* a datum boundary. Update Rule must be applied to the bits outside
|
|
* the field.
|
|
*/
|
|
if (DatumOffset == DatumCount)
|
|
{
|
|
/*
|
|
* If there are dangling non-aligned bits, perform one more merged write
|
|
* Else - field is aligned at the end, no need for any more writes
|
|
*/
|
|
if (ObjDesc->CommonField.EndFieldValidBits)
|
|
{
|
|
/*
|
|
* Part3:
|
|
* This is the last datum and the field does not end on a datum boundary.
|
|
* Build the partial datum and write with the update rule.
|
|
*
|
|
* Mask off the unused bits above (after) the end-of-field
|
|
*/
|
|
Mask = ACPI_MASK_BITS_ABOVE (ObjDesc->CommonField.EndFieldValidBits);
|
|
MergedDatum &= Mask;
|
|
|
|
/* Write the last datum with the update rule */
|
|
|
|
Status = AcpiExWriteWithUpdateRule (ObjDesc, Mask, MergedDatum,
|
|
FieldDatumByteOffset);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Normal case -- write the completed datum */
|
|
|
|
Status = AcpiExFieldDatumIo (ObjDesc, FieldDatumByteOffset,
|
|
&MergedDatum, ACPI_WRITE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Save the most recent datum since it may contain bits of the *next*
|
|
* field datum. Update current byte offset.
|
|
*/
|
|
PreviousRawDatum = ThisRawDatum;
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|