847c562d46
fixes an interrupt storm for certain users. This is done on the vendor branch since the code is already in the 20031029 ACPI-CA dist and will be imported after 5.2R. Tested by: sebastian ssmoller <sebastian.ssmoller@gmx.net> PR: i386/57909 Approved by: re (jhb)
1215 lines
40 KiB
C
1215 lines
40 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: exfldio - Aml Field I/O
|
|
* $Revision: 96 $
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/******************************************************************************
|
|
*
|
|
* 1. Copyright Notice
|
|
*
|
|
* Some or all of this work - Copyright (c) 1999 - 2003, Intel Corp.
|
|
* All rights reserved.
|
|
*
|
|
* 2. License
|
|
*
|
|
* 2.1. This is your license from Intel Corp. under its intellectual property
|
|
* rights. You may have additional license terms from the party that provided
|
|
* you this software, covering your right to use that party's intellectual
|
|
* property rights.
|
|
*
|
|
* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
|
|
* copy of the source code appearing in this file ("Covered Code") an
|
|
* irrevocable, perpetual, worldwide license under Intel's copyrights in the
|
|
* base code distributed originally by Intel ("Original Intel Code") to copy,
|
|
* make derivatives, distribute, use and display any portion of the Covered
|
|
* Code in any form, with the right to sublicense such rights; and
|
|
*
|
|
* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
|
|
* license (with the right to sublicense), under only those claims of Intel
|
|
* patents that are infringed by the Original Intel Code, to make, use, sell,
|
|
* offer to sell, and import the Covered Code and derivative works thereof
|
|
* solely to the minimum extent necessary to exercise the above copyright
|
|
* license, and in no event shall the patent license extend to any additions
|
|
* to or modifications of the Original Intel Code. No other license or right
|
|
* is granted directly or by implication, estoppel or otherwise;
|
|
*
|
|
* The above copyright and patent license is granted only if the following
|
|
* conditions are met:
|
|
*
|
|
* 3. Conditions
|
|
*
|
|
* 3.1. Redistribution of Source with Rights to Further Distribute Source.
|
|
* Redistribution of source code of any substantial portion of the Covered
|
|
* Code or modification with rights to further distribute source must include
|
|
* the above Copyright Notice, the above License, this list of Conditions,
|
|
* and the following Disclaimer and Export Compliance provision. In addition,
|
|
* Licensee must cause all Covered Code to which Licensee contributes to
|
|
* contain a file documenting the changes Licensee made to create that Covered
|
|
* Code and the date of any change. Licensee must include in that file the
|
|
* documentation of any changes made by any predecessor Licensee. Licensee
|
|
* must include a prominent statement that the modification is derived,
|
|
* directly or indirectly, from Original Intel Code.
|
|
*
|
|
* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
|
|
* Redistribution of source code of any substantial portion of the Covered
|
|
* Code or modification without rights to further distribute source must
|
|
* include the following Disclaimer and Export Compliance provision in the
|
|
* documentation and/or other materials provided with distribution. In
|
|
* addition, Licensee may not authorize further sublicense of source of any
|
|
* portion of the Covered Code, and must include terms to the effect that the
|
|
* license from Licensee to its licensee is limited to the intellectual
|
|
* property embodied in the software Licensee provides to its licensee, and
|
|
* not to intellectual property embodied in modifications its licensee may
|
|
* make.
|
|
*
|
|
* 3.3. Redistribution of Executable. Redistribution in executable form of any
|
|
* substantial portion of the Covered Code or modification must reproduce the
|
|
* above Copyright Notice, and the following Disclaimer and Export Compliance
|
|
* provision in the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* 3.4. Intel retains all right, title, and interest in and to the Original
|
|
* Intel Code.
|
|
*
|
|
* 3.5. Neither the name Intel nor any other trademark owned or controlled by
|
|
* Intel shall be used in advertising or otherwise to promote the sale, use or
|
|
* other dealings in products derived from or relating to the Covered Code
|
|
* without prior written authorization from Intel.
|
|
*
|
|
* 4. Disclaimer and Export Compliance
|
|
*
|
|
* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
|
|
* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
|
|
* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
|
|
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
|
|
* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
|
|
* PARTICULAR PURPOSE.
|
|
*
|
|
* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
|
|
* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
|
|
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
|
|
* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
|
|
* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
|
|
* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
|
|
* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
|
|
* LIMITED REMEDY.
|
|
*
|
|
* 4.3. Licensee shall not export, either directly or indirectly, any of this
|
|
* software or system incorporating such software without first obtaining any
|
|
* required license or other approval from the U. S. Department of Commerce or
|
|
* any other agency or department of the United States Government. In the
|
|
* event Licensee exports any such software from the United States or
|
|
* re-exports any such software from a foreign destination, Licensee shall
|
|
* ensure that the distribution and export/re-export of the software is in
|
|
* compliance with all laws, regulations, orders, or other restrictions of the
|
|
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
|
|
* any of its subsidiaries will export/re-export any technical data, process,
|
|
* software, or service, directly or indirectly, to any country for which the
|
|
* United States government or any agency thereof requires an export license,
|
|
* other governmental approval, or letter of assurance, without first obtaining
|
|
* such license, approval or letter.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
|
|
#define __EXFLDIO_C__
|
|
|
|
#include "acpi.h"
|
|
#include "acinterp.h"
|
|
#include "amlcode.h"
|
|
#include "acevents.h"
|
|
#include "acdispat.h"
|
|
|
|
|
|
#define _COMPONENT ACPI_EXECUTER
|
|
ACPI_MODULE_NAME ("exfldio")
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiExSetupRegion
|
|
*
|
|
* PARAMETERS: *ObjDesc - Field to be read or written
|
|
* FieldDatumByteOffset - Byte offset of this datum within the
|
|
* parent field
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Common processing for AcpiExExtractFromField and
|
|
* AcpiExInsertIntoField. Initialize the
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiExSetupRegion (
|
|
ACPI_OPERAND_OBJECT *ObjDesc,
|
|
UINT32 FieldDatumByteOffset)
|
|
{
|
|
ACPI_STATUS Status = AE_OK;
|
|
ACPI_OPERAND_OBJECT *RgnDesc;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_U32 ("ExSetupRegion", FieldDatumByteOffset);
|
|
|
|
|
|
RgnDesc = ObjDesc->CommonField.RegionObj;
|
|
|
|
/* We must have a valid region */
|
|
|
|
if (ACPI_GET_OBJECT_TYPE (RgnDesc) != ACPI_TYPE_REGION)
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Needed Region, found type %X (%s)\n",
|
|
ACPI_GET_OBJECT_TYPE (RgnDesc),
|
|
AcpiUtGetObjectTypeName (RgnDesc)));
|
|
|
|
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
|
|
}
|
|
|
|
/*
|
|
* If the Region Address and Length have not been previously evaluated,
|
|
* evaluate them now and save the results.
|
|
*/
|
|
if (!(RgnDesc->Region.Flags & AOPOBJ_DATA_VALID))
|
|
{
|
|
Status = AcpiDsGetRegionArguments (RgnDesc);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
}
|
|
|
|
if (RgnDesc->Region.SpaceId == ACPI_ADR_SPACE_SMBUS)
|
|
{
|
|
/* SMBus has a non-linear address space */
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
/*
|
|
* Validate the request. The entire request from the byte offset for a
|
|
* length of one field datum (access width) must fit within the region.
|
|
* (Region length is specified in bytes)
|
|
*/
|
|
if (RgnDesc->Region.Length < (ObjDesc->CommonField.BaseByteOffset
|
|
+ FieldDatumByteOffset
|
|
+ ObjDesc->CommonField.AccessByteWidth))
|
|
{
|
|
if (RgnDesc->Region.Length < ObjDesc->CommonField.AccessByteWidth)
|
|
{
|
|
/*
|
|
* This is the case where the AccessType (AccWord, etc.) is wider
|
|
* than the region itself. For example, a region of length one
|
|
* byte, and a field with Dword access specified.
|
|
*/
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
|
"Field [%4.4s] access width (%d bytes) too large for region [%4.4s] (length %X)\n",
|
|
ObjDesc->CommonField.Node->Name.Ascii, ObjDesc->CommonField.AccessByteWidth,
|
|
RgnDesc->Region.Node->Name.Ascii, RgnDesc->Region.Length));
|
|
}
|
|
|
|
/*
|
|
* Offset rounded up to next multiple of field width
|
|
* exceeds region length, indicate an error
|
|
*/
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
|
"Field [%4.4s] Base+Offset+Width %X+%X+%X is beyond end of region [%4.4s] (length %X)\n",
|
|
ObjDesc->CommonField.Node->Name.Ascii, ObjDesc->CommonField.BaseByteOffset,
|
|
FieldDatumByteOffset, ObjDesc->CommonField.AccessByteWidth,
|
|
RgnDesc->Region.Node->Name.Ascii, RgnDesc->Region.Length));
|
|
|
|
return_ACPI_STATUS (AE_AML_REGION_LIMIT);
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiExAccessRegion
|
|
*
|
|
* PARAMETERS: *ObjDesc - Field to be read
|
|
* FieldDatumByteOffset - Byte offset of this datum within the
|
|
* parent field
|
|
* *Value - Where to store value (must at least
|
|
* the size of ACPI_INTEGER)
|
|
* Function - Read or Write flag plus other region-
|
|
* dependent flags
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Read or Write a single field datum to an Operation Region.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiExAccessRegion (
|
|
ACPI_OPERAND_OBJECT *ObjDesc,
|
|
UINT32 FieldDatumByteOffset,
|
|
ACPI_INTEGER *Value,
|
|
UINT32 Function)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_OPERAND_OBJECT *RgnDesc;
|
|
ACPI_PHYSICAL_ADDRESS Address;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("ExAccessRegion");
|
|
|
|
|
|
/*
|
|
* Ensure that the region operands are fully evaluated and verify
|
|
* the validity of the request
|
|
*/
|
|
Status = AcpiExSetupRegion (ObjDesc, FieldDatumByteOffset);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/*
|
|
* The physical address of this field datum is:
|
|
*
|
|
* 1) The base of the region, plus
|
|
* 2) The base offset of the field, plus
|
|
* 3) The current offset into the field
|
|
*/
|
|
RgnDesc = ObjDesc->CommonField.RegionObj;
|
|
Address = RgnDesc->Region.Address
|
|
+ ObjDesc->CommonField.BaseByteOffset
|
|
+ FieldDatumByteOffset;
|
|
|
|
if ((Function & ACPI_IO_MASK) == ACPI_READ)
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "[READ]"));
|
|
}
|
|
else
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "[WRITE]"));
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_BFIELD,
|
|
" Region[%s-%X] Access %X Base:Off %X:%X at %8.8X%8.8X\n",
|
|
AcpiUtGetRegionName (RgnDesc->Region.SpaceId),
|
|
RgnDesc->Region.SpaceId,
|
|
ObjDesc->CommonField.AccessByteWidth,
|
|
ObjDesc->CommonField.BaseByteOffset,
|
|
FieldDatumByteOffset,
|
|
ACPI_HIDWORD (Address), ACPI_LODWORD (Address)));
|
|
|
|
/* Invoke the appropriate AddressSpace/OpRegion handler */
|
|
|
|
Status = AcpiEvAddressSpaceDispatch (RgnDesc, Function,
|
|
Address, ACPI_MUL_8 (ObjDesc->CommonField.AccessByteWidth), Value);
|
|
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
if (Status == AE_NOT_IMPLEMENTED)
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
|
"Region %s(%X) not implemented\n",
|
|
AcpiUtGetRegionName (RgnDesc->Region.SpaceId),
|
|
RgnDesc->Region.SpaceId));
|
|
}
|
|
else if (Status == AE_NOT_EXIST)
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
|
"Region %s(%X) has no handler\n",
|
|
AcpiUtGetRegionName (RgnDesc->Region.SpaceId),
|
|
RgnDesc->Region.SpaceId));
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiExRegisterOverflow
|
|
*
|
|
* PARAMETERS: *ObjDesc - Register(Field) to be written
|
|
* Value - Value to be stored
|
|
*
|
|
* RETURN: TRUE if value overflows the field, FALSE otherwise
|
|
*
|
|
* DESCRIPTION: Check if a value is out of range of the field being written.
|
|
* Used to check if the values written to Index and Bank registers
|
|
* are out of range. Normally, the value is simply truncated
|
|
* to fit the field, but this case is most likely a serious
|
|
* coding error in the ASL.
|
|
*
|
|
******************************************************************************/
|
|
|
|
BOOLEAN
|
|
AcpiExRegisterOverflow (
|
|
ACPI_OPERAND_OBJECT *ObjDesc,
|
|
ACPI_INTEGER Value)
|
|
{
|
|
|
|
if (ObjDesc->CommonField.BitLength >= ACPI_INTEGER_BIT_SIZE)
|
|
{
|
|
/*
|
|
* The field is large enough to hold the maximum integer, so we can
|
|
* never overflow it.
|
|
*/
|
|
return (FALSE);
|
|
}
|
|
|
|
if (Value >= ((ACPI_INTEGER) 1 << ObjDesc->CommonField.BitLength))
|
|
{
|
|
/*
|
|
* The Value is larger than the maximum value that can fit into
|
|
* the register.
|
|
*/
|
|
return (TRUE);
|
|
}
|
|
|
|
/* The Value will fit into the field with no truncation */
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiExFieldDatumIo
|
|
*
|
|
* PARAMETERS: *ObjDesc - Field to be read
|
|
* FieldDatumByteOffset - Byte offset of this datum within the
|
|
* parent field
|
|
* *Value - Where to store value (must be 64 bits)
|
|
* ReadWrite - Read or Write flag
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Read or Write a single datum of a field. The FieldType is
|
|
* demultiplexed here to handle the different types of fields
|
|
* (BufferField, RegionField, IndexField, BankField)
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiExFieldDatumIo (
|
|
ACPI_OPERAND_OBJECT *ObjDesc,
|
|
UINT32 FieldDatumByteOffset,
|
|
ACPI_INTEGER *Value,
|
|
UINT32 ReadWrite)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_INTEGER LocalValue;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_U32 ("ExFieldDatumIo", FieldDatumByteOffset);
|
|
|
|
|
|
if (ReadWrite == ACPI_READ)
|
|
{
|
|
if (!Value)
|
|
{
|
|
LocalValue = 0;
|
|
Value = &LocalValue; /* To support reads without saving return value */
|
|
}
|
|
|
|
/* Clear the entire return buffer first, [Very Important!] */
|
|
|
|
*Value = 0;
|
|
}
|
|
|
|
/*
|
|
* The four types of fields are:
|
|
*
|
|
* BufferField - Read/write from/to a Buffer
|
|
* RegionField - Read/write from/to a Operation Region.
|
|
* BankField - Write to a Bank Register, then read/write from/to an OpRegion
|
|
* IndexField - Write to an Index Register, then read/write from/to a Data Register
|
|
*/
|
|
switch (ACPI_GET_OBJECT_TYPE (ObjDesc))
|
|
{
|
|
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 ACPI_TYPE_LOCAL_BANK_FIELD:
|
|
|
|
/* Ensure that the BankValue is not beyond the capacity of the register */
|
|
|
|
if (AcpiExRegisterOverflow (ObjDesc->BankField.BankObj,
|
|
(ACPI_INTEGER) 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
|
|
*/
|
|
|
|
/*lint -fallthrough */
|
|
|
|
|
|
case ACPI_TYPE_LOCAL_REGION_FIELD:
|
|
/*
|
|
* For simple RegionFields, we just directly access the owning
|
|
* Operation Region.
|
|
*/
|
|
Status = AcpiExAccessRegion (ObjDesc, FieldDatumByteOffset, Value,
|
|
ReadWrite);
|
|
break;
|
|
|
|
|
|
case ACPI_TYPE_LOCAL_INDEX_FIELD:
|
|
|
|
|
|
/* Ensure that the IndexValue is not beyond the capacity of the register */
|
|
|
|
if (AcpiExRegisterOverflow (ObjDesc->IndexField.IndexObj,
|
|
(ACPI_INTEGER) ObjDesc->IndexField.Value))
|
|
{
|
|
return_ACPI_STATUS (AE_AML_REGISTER_LIMIT);
|
|
}
|
|
|
|
/* Write the index value to the IndexRegister (itself a RegionField) */
|
|
|
|
FieldDatumByteOffset += ObjDesc->IndexField.Value;
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD,
|
|
"Write to Index Register: Value %8.8X\n",
|
|
FieldDatumByteOffset));
|
|
|
|
Status = AcpiExInsertIntoField (ObjDesc->IndexField.IndexObj,
|
|
&FieldDatumByteOffset,
|
|
sizeof (FieldDatumByteOffset));
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD,
|
|
"I/O to Data Register: ValuePtr %p\n",
|
|
Value));
|
|
|
|
if (ReadWrite == ACPI_READ)
|
|
{
|
|
/* Read the datum from the DataRegister */
|
|
|
|
Status = AcpiExExtractFromField (ObjDesc->IndexField.DataObj,
|
|
Value, sizeof (ACPI_INTEGER));
|
|
}
|
|
else
|
|
{
|
|
/* Write the datum to the DataRegister */
|
|
|
|
Status = AcpiExInsertIntoField (ObjDesc->IndexField.DataObj,
|
|
Value, sizeof (ACPI_INTEGER));
|
|
}
|
|
break;
|
|
|
|
|
|
default:
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "%p, Wrong object type - %s\n",
|
|
ObjDesc, AcpiUtGetObjectTypeName (ObjDesc)));
|
|
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_INTEGER_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
|
|
* BufferLength - Entire length (used for big-endian only)
|
|
* ByteGranularity - 1/2/4/8 Granularity of the field
|
|
* (aka Datum Size)
|
|
* BufferOffset - 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 BufferLength,
|
|
UINT32 ByteGranularity,
|
|
UINT32 BufferOffset)
|
|
{
|
|
UINT32 Index;
|
|
|
|
|
|
ACPI_FUNCTION_ENTRY ();
|
|
|
|
|
|
/* Get proper index into buffer (handles big/little endian) */
|
|
|
|
Index = ACPI_BUFFER_INDEX (BufferLength, BufferOffset, ByteGranularity);
|
|
|
|
/* Move the requested number of bytes */
|
|
|
|
switch (ByteGranularity)
|
|
{
|
|
case ACPI_FIELD_BYTE_GRANULARITY:
|
|
|
|
*Datum = ((UINT8 *) Buffer) [Index];
|
|
break;
|
|
|
|
case ACPI_FIELD_WORD_GRANULARITY:
|
|
|
|
ACPI_MOVE_16_TO_64 (Datum, &(((UINT16 *) Buffer) [Index]));
|
|
break;
|
|
|
|
case ACPI_FIELD_DWORD_GRANULARITY:
|
|
|
|
ACPI_MOVE_32_TO_64 (Datum, &(((UINT32 *) Buffer) [Index]));
|
|
break;
|
|
|
|
case ACPI_FIELD_QWORD_GRANULARITY:
|
|
|
|
ACPI_MOVE_64_TO_64 (Datum, &(((UINT64 *) Buffer) [Index]));
|
|
break;
|
|
|
|
default:
|
|
/* Should not get here */
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiExSetBufferDatum
|
|
*
|
|
* PARAMETERS: MergedDatum - Value to store
|
|
* Buffer - Receiving buffer
|
|
* BufferLength - Entire length (used for big-endian only)
|
|
* ByteGranularity - 1/2/4/8 Granularity of the field
|
|
* (aka Datum Size)
|
|
* BufferOffset - 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 BufferLength,
|
|
UINT32 ByteGranularity,
|
|
UINT32 BufferOffset)
|
|
{
|
|
UINT32 Index;
|
|
|
|
ACPI_FUNCTION_ENTRY ();
|
|
|
|
|
|
/* Get proper index into buffer (handles big/little endian) */
|
|
|
|
Index = ACPI_BUFFER_INDEX (BufferLength, BufferOffset, ByteGranularity);
|
|
|
|
/* Move the requested number of bytes */
|
|
|
|
switch (ByteGranularity)
|
|
{
|
|
case ACPI_FIELD_BYTE_GRANULARITY:
|
|
|
|
((UINT8 *) Buffer) [Index] = (UINT8) MergedDatum;
|
|
break;
|
|
|
|
case ACPI_FIELD_WORD_GRANULARITY:
|
|
|
|
ACPI_MOVE_64_TO_16 (&(((UINT16 *) Buffer)[Index]), &MergedDatum);
|
|
break;
|
|
|
|
case ACPI_FIELD_DWORD_GRANULARITY:
|
|
|
|
ACPI_MOVE_64_TO_32 (&(((UINT32 *) Buffer)[Index]), &MergedDatum);
|
|
break;
|
|
|
|
case ACPI_FIELD_QWORD_GRANULARITY:
|
|
|
|
ACPI_MOVE_64_TO_64 (&(((UINT64 *) Buffer)[Index]), &MergedDatum);
|
|
break;
|
|
|
|
default:
|
|
/* Should not get here */
|
|
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_BFIELD,
|
|
"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_BFIELD,
|
|
"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, BufferLength,
|
|
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, BufferLength,
|
|
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_BFIELD, "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_BFIELD,
|
|
"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, BufferLength,
|
|
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, BufferLength,
|
|
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);
|
|
}
|
|
|
|
|