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freebsd/sys/contrib/dev/acpica/dsfield.c

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/******************************************************************************
*
* Module Name: dsfield - Dispatcher field routines
* $Revision: 56 $
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999, 2000, 2001, 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 __DSFIELD_C__
#include "acpi.h"
#include "amlcode.h"
#include "acdispat.h"
#include "acinterp.h"
#include "acnamesp.h"
#include "acparser.h"
#define _COMPONENT ACPI_DISPATCHER
MODULE_NAME ("dsfield")
/*******************************************************************************
*
* FUNCTION: AcpiDsCreateBufferField
*
* PARAMETERS: Opcode - The opcode to be executed
* Operands - List of operands for the opcode
* WalkState - Current state
*
* RETURN: Status
*
* DESCRIPTION: Execute the CreateField operators:
* CreateBitFieldOp,
* CreateByteFieldOp,
* CreateWordFieldOp,
* CreateDWordFieldOp,
* CreateQWordFieldOp,
* CreateFieldOp (all of which define fields in buffers)
*
******************************************************************************/
ACPI_STATUS
AcpiDsCreateBufferField (
ACPI_PARSE_OBJECT *Op,
ACPI_WALK_STATE *WalkState)
{
ACPI_PARSE_OBJECT *Arg;
ACPI_NAMESPACE_NODE *Node;
ACPI_STATUS Status;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_OPERAND_OBJECT *SecondDesc = NULL;
UINT32 Flags;
FUNCTION_TRACE ("DsCreateBufferField");
/* Get the NameString argument */
if (Op->Opcode == AML_CREATE_FIELD_OP)
{
Arg = AcpiPsGetArg (Op, 3);
}
else
{
/* Create Bit/Byte/Word/Dword field */
Arg = AcpiPsGetArg (Op, 2);
}
if (!Arg)
{
return_ACPI_STATUS (AE_AML_NO_OPERAND);
}
/*
* During the load phase, we want to enter the name of the field into
* the namespace. During the execute phase (when we evaluate the size
* operand), we want to lookup the name
*/
if (WalkState->ParseFlags & ACPI_PARSE_EXECUTE)
{
Flags = NS_NO_UPSEARCH | NS_DONT_OPEN_SCOPE;
}
else
{
Flags = NS_NO_UPSEARCH | NS_DONT_OPEN_SCOPE | NS_ERROR_IF_FOUND;
}
/*
* Enter the NameString into the namespace
*/
Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Value.String,
INTERNAL_TYPE_DEF_ANY, IMODE_LOAD_PASS1,
Flags,
WalkState, &(Node));
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* We could put the returned object (Node) on the object stack for later, but
* for now, we will put it in the "op" object that the parser uses, so we
* can get it again at the end of this scope
*/
Op->Node = Node;
/*
* If there is no object attached to the node, this node was just created and
* we need to create the field object. Otherwise, this was a lookup of an
* existing node and we don't want to create the field object again.
*/
ObjDesc = AcpiNsGetAttachedObject (Node);
if (ObjDesc)
{
return_ACPI_STATUS (AE_OK);
}
/*
* The Field definition is not fully parsed at this time.
* (We must save the address of the AML for the buffer and index operands)
*/
/* Create the buffer field object */
ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER_FIELD);
if (!ObjDesc)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
/*
* Remember location in AML stream of the field unit
* opcode and operands -- since the buffer and index
* operands must be evaluated.
*/
SecondDesc = ObjDesc->Common.NextObject;
SecondDesc->Extra.AmlStart = ((ACPI_PARSE2_OBJECT *) Op)->Data;
SecondDesc->Extra.AmlLength = ((ACPI_PARSE2_OBJECT *) Op)->Length;
ObjDesc->BufferField.Node = Node;
/* Attach constructed field descriptors to parent node */
Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_BUFFER_FIELD);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
Cleanup:
/* Remove local reference to the object */
AcpiUtRemoveReference (ObjDesc);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiDsGetFieldNames
*
* PARAMETERS: Info - CreateField info structure
* ` WalkState - Current method state
* Arg - First parser arg for the field name list
*
* RETURN: Status
*
* DESCRIPTION: Process all named fields in a field declaration. Names are
* entered into the namespace.
*
******************************************************************************/
ACPI_STATUS
AcpiDsGetFieldNames (
ACPI_CREATE_FIELD_INFO *Info,
ACPI_WALK_STATE *WalkState,
ACPI_PARSE_OBJECT *Arg)
{
ACPI_STATUS Status;
FUNCTION_TRACE_U32 ("DsGetFieldNames", Info);
/* First field starts at bit zero */
Info->FieldBitPosition = 0;
/* Process all elements in the field list (of parse nodes) */
while (Arg)
{
/*
* Three types of field elements are handled:
* 1) Offset - specifies a bit offset
* 2) AccessAs - changes the access mode
* 3) Name - Enters a new named field into the namespace
*/
switch (Arg->Opcode)
{
case AML_INT_RESERVEDFIELD_OP:
Info->FieldBitPosition += Arg->Value.Size;
break;
case AML_INT_ACCESSFIELD_OP:
/*
* Get a new AccessType and AccessAttribute -- to be used for all
* field units that follow, until field end or another AccessAs keyword.
*
* In FieldFlags, preserve the flag bits other than the ACCESS_TYPE bits
*/
Info->FieldFlags = (UINT8) ((Info->FieldFlags & ~(AML_FIELD_ACCESS_TYPE_MASK)) |
((UINT8) (Arg->Value.Integer32 >> 8)));
Info->Attribute = (UINT8) (Arg->Value.Integer32);
break;
case AML_INT_NAMEDFIELD_OP:
/* Lookup the name */
Status = AcpiNsLookup (WalkState->ScopeInfo,
(NATIVE_CHAR *) &((ACPI_PARSE2_OBJECT *)Arg)->Name,
Info->FieldType, IMODE_EXECUTE, NS_DONT_OPEN_SCOPE,
NULL, &Info->FieldNode);
if (ACPI_FAILURE (Status))
{
if (Status != AE_ALREADY_EXISTS)
{
return_ACPI_STATUS (Status);
}
REPORT_ERROR (("Field name [%4.4s] already exists in current scope\n",
&((ACPI_PARSE2_OBJECT *)Arg)->Name));
}
else
{
Arg->Node = Info->FieldNode;
Info->FieldBitLength = Arg->Value.Size;
/* Create and initialize an object for the new Field Node */
Status = AcpiExPrepFieldValue (Info);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
/* Keep track of bit position for the next field */
Info->FieldBitPosition += Info->FieldBitLength;
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid opcode in field list: %X\n",
Arg->Opcode));
return_ACPI_STATUS (AE_AML_ERROR);
break;
}
Arg = Arg->Next;
}
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiDsCreateField
*
* PARAMETERS: Op - Op containing the Field definition and args
* RegionNode - Object for the containing Operation Region
* ` WalkState - Current method state
*
* RETURN: Status
*
* DESCRIPTION: Create a new field in the specified operation region
*
******************************************************************************/
ACPI_STATUS
AcpiDsCreateField (
ACPI_PARSE_OBJECT *Op,
ACPI_NAMESPACE_NODE *RegionNode,
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status = AE_AML_ERROR;
ACPI_PARSE_OBJECT *Arg;
ACPI_CREATE_FIELD_INFO Info;
FUNCTION_TRACE_PTR ("DsCreateField", Op);
/* First arg is the name of the parent OpRegion (must already exist) */
Arg = Op->Value.Arg;
if (!RegionNode)
{
Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Value.Name,
ACPI_TYPE_REGION, IMODE_EXECUTE,
NS_SEARCH_PARENT, WalkState, &RegionNode);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
/* Second arg is the field flags */
Arg = Arg->Next;
Info.FieldFlags = Arg->Value.Integer8;
Info.Attribute = 0;
/* Each remaining arg is a Named Field */
Info.FieldType = INTERNAL_TYPE_REGION_FIELD;
Info.RegionNode = RegionNode;
Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Next);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiDsInitFieldObjects
*
* PARAMETERS: Op - Op containing the Field definition and args
* ` WalkState - Current method state
*
* RETURN: Status
*
* DESCRIPTION: For each "Field Unit" name in the argument list that is
* part of the field declaration, enter the name into the
* namespace.
*
******************************************************************************/
ACPI_STATUS
AcpiDsInitFieldObjects (
ACPI_PARSE_OBJECT *Op,
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status = AE_AML_ERROR;
ACPI_PARSE_OBJECT *Arg = NULL;
ACPI_NAMESPACE_NODE *Node;
UINT8 Type = 0;
FUNCTION_TRACE_PTR ("DsInitFieldObjects", Op);
switch (WalkState->Opcode)
{
case AML_FIELD_OP:
Arg = AcpiPsGetArg (Op, 2);
Type = INTERNAL_TYPE_REGION_FIELD;
break;
case AML_BANK_FIELD_OP:
Arg = AcpiPsGetArg (Op, 4);
Type = INTERNAL_TYPE_BANK_FIELD;
break;
case AML_INDEX_FIELD_OP:
Arg = AcpiPsGetArg (Op, 3);
Type = INTERNAL_TYPE_INDEX_FIELD;
break;
}
/*
* Walk the list of entries in the FieldList
*/
while (Arg)
{
/* Ignore OFFSET and ACCESSAS terms here */
if (Arg->Opcode == AML_INT_NAMEDFIELD_OP)
{
Status = AcpiNsLookup (WalkState->ScopeInfo,
(NATIVE_CHAR *) &((ACPI_PARSE2_OBJECT *)Arg)->Name,
Type, IMODE_LOAD_PASS1,
NS_NO_UPSEARCH | NS_DONT_OPEN_SCOPE | NS_ERROR_IF_FOUND,
NULL, &Node);
if (ACPI_FAILURE (Status))
{
if (Status != AE_ALREADY_EXISTS)
{
return_ACPI_STATUS (Status);
}
REPORT_ERROR (("Field name [%4.4s] already exists in current scope\n",
&((ACPI_PARSE2_OBJECT *)Arg)->Name));
}
Arg->Node = Node;
}
/* Move on to next field in the list */
Arg = Arg->Next;
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiDsCreateBankField
*
* PARAMETERS: Op - Op containing the Field definition and args
* RegionNode - Object for the containing Operation Region
* ` WalkState - Current method state
*
* RETURN: Status
*
* DESCRIPTION: Create a new bank field in the specified operation region
*
******************************************************************************/
ACPI_STATUS
AcpiDsCreateBankField (
ACPI_PARSE_OBJECT *Op,
ACPI_NAMESPACE_NODE *RegionNode,
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status = AE_AML_ERROR;
ACPI_PARSE_OBJECT *Arg;
ACPI_CREATE_FIELD_INFO Info;
FUNCTION_TRACE_PTR ("DsCreateBankField", Op);
/* First arg is the name of the parent OpRegion (must already exist) */
Arg = Op->Value.Arg;
if (!RegionNode)
{
Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Value.Name,
ACPI_TYPE_REGION, IMODE_EXECUTE,
NS_SEARCH_PARENT, WalkState, &RegionNode);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
/* Second arg is the Bank Register (must already exist) */
Arg = Arg->Next;
Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Value.String,
INTERNAL_TYPE_BANK_FIELD_DEFN, IMODE_EXECUTE,
NS_SEARCH_PARENT, WalkState, &Info.RegisterNode);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Third arg is the BankValue */
Arg = Arg->Next;
Info.BankValue = Arg->Value.Integer32;
/* Fourth arg is the field flags */
Arg = Arg->Next;
Info.FieldFlags = Arg->Value.Integer8;
/* Each remaining arg is a Named Field */
Info.FieldType = INTERNAL_TYPE_BANK_FIELD;
Info.RegionNode = RegionNode;
Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Next);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiDsCreateIndexField
*
* PARAMETERS: Op - Op containing the Field definition and args
* RegionNode - Object for the containing Operation Region
* ` WalkState - Current method state
*
* RETURN: Status
*
* DESCRIPTION: Create a new index field in the specified operation region
*
******************************************************************************/
ACPI_STATUS
AcpiDsCreateIndexField (
ACPI_PARSE_OBJECT *Op,
ACPI_NAMESPACE_NODE *RegionNode,
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status;
ACPI_PARSE_OBJECT *Arg;
ACPI_CREATE_FIELD_INFO Info;
FUNCTION_TRACE_PTR ("DsCreateIndexField", Op);
/* First arg is the name of the Index register (must already exist) */
Arg = Op->Value.Arg;
Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Value.String,
ACPI_TYPE_ANY, IMODE_EXECUTE,
NS_SEARCH_PARENT, WalkState, &Info.RegisterNode);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Second arg is the data register (must already exist) */
Arg = Arg->Next;
Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Value.String,
INTERNAL_TYPE_INDEX_FIELD_DEFN, IMODE_EXECUTE,
NS_SEARCH_PARENT, WalkState, &Info.DataRegisterNode);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Next arg is the field flags */
Arg = Arg->Next;
Info.FieldFlags = Arg->Value.Integer8;
/* Each remaining arg is a Named Field */
Info.FieldType = INTERNAL_TYPE_INDEX_FIELD;
Info.RegionNode = RegionNode;
Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Next);
return_ACPI_STATUS (Status);
}
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