464 lines
16 KiB
C
464 lines
16 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: exfield - ACPI AML (p-code) execution - field manipulation
|
|
* $Revision: 118 $
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/******************************************************************************
|
|
*
|
|
* 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 __EXFIELD_C__
|
|
|
|
#include "acpi.h"
|
|
#include "acdispat.h"
|
|
#include "acinterp.h"
|
|
|
|
|
|
#define _COMPONENT ACPI_EXECUTER
|
|
ACPI_MODULE_NAME ("exfield")
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiExReadDataFromField
|
|
*
|
|
* PARAMETERS: WalkState - Current execution state
|
|
* ObjDesc - The named field
|
|
* RetBufferDesc - Where the return data object is stored
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Read from a named field. Returns either an Integer or a
|
|
* Buffer, depending on the size of the field.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiExReadDataFromField (
|
|
ACPI_WALK_STATE *WalkState,
|
|
ACPI_OPERAND_OBJECT *ObjDesc,
|
|
ACPI_OPERAND_OBJECT **RetBufferDesc)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_OPERAND_OBJECT *BufferDesc;
|
|
ACPI_SIZE Length;
|
|
void *Buffer;
|
|
BOOLEAN Locked;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR ("ExReadDataFromField", ObjDesc);
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
if (!ObjDesc)
|
|
{
|
|
return_ACPI_STATUS (AE_AML_NO_OPERAND);
|
|
}
|
|
|
|
if (ACPI_GET_OBJECT_TYPE (ObjDesc) == 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);
|
|
}
|
|
}
|
|
}
|
|
else if ((ACPI_GET_OBJECT_TYPE (ObjDesc) == ACPI_TYPE_LOCAL_REGION_FIELD) &&
|
|
(ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_SMBUS))
|
|
{
|
|
/*
|
|
* This is an SMBus read. We must create a buffer to hold the data
|
|
* and directly access the region handler.
|
|
*/
|
|
BufferDesc = AcpiUtCreateBufferObject (ACPI_SMBUS_BUFFER_SIZE);
|
|
if (!BufferDesc)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
|
|
/* Lock entire transaction if requested */
|
|
|
|
Locked = AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags);
|
|
|
|
/*
|
|
* Perform the read.
|
|
* Note: Smbus protocol value is passed in upper 16-bits of Function
|
|
*/
|
|
Status = AcpiExAccessRegion (ObjDesc, 0,
|
|
ACPI_CAST_PTR (ACPI_INTEGER, BufferDesc->Buffer.Pointer),
|
|
ACPI_READ | (ObjDesc->Field.Attribute << 16));
|
|
AcpiExReleaseGlobalLock (Locked);
|
|
goto Exit;
|
|
}
|
|
|
|
/*
|
|
* Allocate a buffer for the contents of the field.
|
|
*
|
|
* If the field is larger than the size of an ACPI_INTEGER, create
|
|
* a BUFFER to hold it. Otherwise, use an INTEGER. This allows
|
|
* the use of arithmetic operators on the returned value if the
|
|
* field size is equal or smaller than an Integer.
|
|
*
|
|
* Note: Field.length is in bits.
|
|
*/
|
|
Length = (ACPI_SIZE) ACPI_ROUND_BITS_UP_TO_BYTES (ObjDesc->Field.BitLength);
|
|
if (Length > AcpiGbl_IntegerByteWidth)
|
|
{
|
|
/* Field is too large for an Integer, create a Buffer instead */
|
|
|
|
BufferDesc = AcpiUtCreateBufferObject (Length);
|
|
if (!BufferDesc)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
Buffer = BufferDesc->Buffer.Pointer;
|
|
}
|
|
else
|
|
{
|
|
/* Field will fit within an Integer (normal case) */
|
|
|
|
BufferDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
|
|
if (!BufferDesc)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
|
|
Length = AcpiGbl_IntegerByteWidth;
|
|
BufferDesc->Integer.Value = 0;
|
|
Buffer = &BufferDesc->Integer.Value;
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD,
|
|
"Obj=%p Type=%X Buf=%p Len=%X\n",
|
|
ObjDesc, ACPI_GET_OBJECT_TYPE (ObjDesc), Buffer, (UINT32) Length));
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD,
|
|
"FieldWrite: BitLen=%X BitOff=%X ByteOff=%X\n",
|
|
ObjDesc->CommonField.BitLength,
|
|
ObjDesc->CommonField.StartFieldBitOffset,
|
|
ObjDesc->CommonField.BaseByteOffset));
|
|
|
|
/* Lock entire transaction if requested */
|
|
|
|
Locked = AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags);
|
|
|
|
/* Read from the field */
|
|
|
|
Status = AcpiExExtractFromField (ObjDesc, Buffer, (UINT32) Length);
|
|
AcpiExReleaseGlobalLock (Locked);
|
|
|
|
|
|
Exit:
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
AcpiUtRemoveReference (BufferDesc);
|
|
}
|
|
else if (RetBufferDesc)
|
|
{
|
|
*RetBufferDesc = BufferDesc;
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiExWriteDataToField
|
|
*
|
|
* PARAMETERS: SourceDesc - Contains data to write
|
|
* ObjDesc - The named field
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Write to a named field
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiExWriteDataToField (
|
|
ACPI_OPERAND_OBJECT *SourceDesc,
|
|
ACPI_OPERAND_OBJECT *ObjDesc,
|
|
ACPI_OPERAND_OBJECT **ResultDesc)
|
|
{
|
|
ACPI_STATUS Status;
|
|
UINT32 Length;
|
|
UINT32 RequiredLength;
|
|
void *Buffer;
|
|
void *NewBuffer;
|
|
BOOLEAN Locked;
|
|
ACPI_OPERAND_OBJECT *BufferDesc;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR ("ExWriteDataToField", ObjDesc);
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
if (!SourceDesc || !ObjDesc)
|
|
{
|
|
return_ACPI_STATUS (AE_AML_NO_OPERAND);
|
|
}
|
|
|
|
if (ACPI_GET_OBJECT_TYPE (ObjDesc) == 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);
|
|
}
|
|
}
|
|
}
|
|
else if ((ACPI_GET_OBJECT_TYPE (ObjDesc) == ACPI_TYPE_LOCAL_REGION_FIELD) &&
|
|
(ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_SMBUS))
|
|
{
|
|
/*
|
|
* This is an SMBus write. We will bypass the entire field mechanism
|
|
* and handoff the buffer directly to the handler.
|
|
*
|
|
* Source must be a buffer of sufficient size (ACPI_SMBUS_BUFFER_SIZE).
|
|
*/
|
|
if (ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_TYPE_BUFFER)
|
|
{
|
|
ACPI_REPORT_ERROR (("SMBus write requires Buffer, found type %s\n",
|
|
AcpiUtGetObjectTypeName (SourceDesc)));
|
|
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
|
|
}
|
|
|
|
if (SourceDesc->Buffer.Length < ACPI_SMBUS_BUFFER_SIZE)
|
|
{
|
|
ACPI_REPORT_ERROR (("SMBus write requires Buffer of length %X, found length %X\n",
|
|
ACPI_SMBUS_BUFFER_SIZE, SourceDesc->Buffer.Length));
|
|
return_ACPI_STATUS (AE_AML_BUFFER_LIMIT);
|
|
}
|
|
|
|
BufferDesc = AcpiUtCreateBufferObject (ACPI_SMBUS_BUFFER_SIZE);
|
|
if (!BufferDesc)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
|
|
Buffer = BufferDesc->Buffer.Pointer;
|
|
ACPI_MEMCPY (Buffer, SourceDesc->Buffer.Pointer, ACPI_SMBUS_BUFFER_SIZE);
|
|
|
|
/* Lock entire transaction if requested */
|
|
|
|
Locked = AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags);
|
|
|
|
/*
|
|
* Perform the write (returns status and perhaps data in the same buffer)
|
|
* Note: SMBus protocol type is passed in upper 16-bits of Function.
|
|
*/
|
|
Status = AcpiExAccessRegion (ObjDesc, 0,
|
|
(ACPI_INTEGER *) Buffer,
|
|
ACPI_WRITE | (ObjDesc->Field.Attribute << 16));
|
|
AcpiExReleaseGlobalLock (Locked);
|
|
|
|
*ResultDesc = BufferDesc;
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/*
|
|
* Get a pointer to the data to be written
|
|
*/
|
|
switch (ACPI_GET_OBJECT_TYPE (SourceDesc))
|
|
{
|
|
case ACPI_TYPE_INTEGER:
|
|
Buffer = &SourceDesc->Integer.Value;
|
|
Length = sizeof (SourceDesc->Integer.Value);
|
|
break;
|
|
|
|
case ACPI_TYPE_BUFFER:
|
|
Buffer = SourceDesc->Buffer.Pointer;
|
|
Length = SourceDesc->Buffer.Length;
|
|
break;
|
|
|
|
case ACPI_TYPE_STRING:
|
|
Buffer = SourceDesc->String.Pointer;
|
|
Length = SourceDesc->String.Length;
|
|
break;
|
|
|
|
default:
|
|
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
|
|
}
|
|
|
|
/*
|
|
* We must have a buffer that is at least as long as the field
|
|
* we are writing to. This is because individual fields are
|
|
* indivisible and partial writes are not supported -- as per
|
|
* the ACPI specification.
|
|
*/
|
|
NewBuffer = NULL;
|
|
RequiredLength = ACPI_ROUND_BITS_UP_TO_BYTES (ObjDesc->CommonField.BitLength);
|
|
|
|
if (Length < RequiredLength)
|
|
{
|
|
/* We need to create a new buffer */
|
|
|
|
NewBuffer = ACPI_MEM_CALLOCATE (RequiredLength);
|
|
if (!NewBuffer)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
|
|
/*
|
|
* Copy the original data to the new buffer, starting
|
|
* at Byte zero. All unused (upper) bytes of the
|
|
* buffer will be 0.
|
|
*/
|
|
ACPI_MEMCPY ((char *) NewBuffer, (char *) Buffer, Length);
|
|
Buffer = NewBuffer;
|
|
Length = RequiredLength;
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD,
|
|
"Obj=%p Type=%X Buf=%p Len=%X\n",
|
|
ObjDesc, ACPI_GET_OBJECT_TYPE (ObjDesc), Buffer, Length));
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD,
|
|
"FieldRead: BitLen=%X BitOff=%X ByteOff=%X\n",
|
|
ObjDesc->CommonField.BitLength,
|
|
ObjDesc->CommonField.StartFieldBitOffset,
|
|
ObjDesc->CommonField.BaseByteOffset));
|
|
|
|
/* Lock entire transaction if requested */
|
|
|
|
Locked = AcpiExAcquireGlobalLock (ObjDesc->CommonField.FieldFlags);
|
|
|
|
/* Write to the field */
|
|
|
|
Status = AcpiExInsertIntoField (ObjDesc, Buffer, Length);
|
|
AcpiExReleaseGlobalLock (Locked);
|
|
|
|
/* Free temporary buffer if we used one */
|
|
|
|
if (NewBuffer)
|
|
{
|
|
ACPI_MEM_FREE (NewBuffer);
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|