FreeBSD/Linux Kernel Cross Reference
sys/contrib/dev/acpica/components/dispatcher/dsfield.c

     /******************************************************************************
      *
      * Module Name: dsfield - Dispatcher field routines
      *
      *****************************************************************************/
     
     /******************************************************************************
      *
      * 1. Copyright Notice
     *
     * Some or all of this work - Copyright (c) 1999 - 2022, 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.
    *
    *****************************************************************************
    *
    * Alternatively, you may choose to be licensed under the terms of the
    * following license:
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions
    * are met:
    * 1. Redistributions of source code must retain the above copyright
    *    notice, this list of conditions, and the following disclaimer,
    *    without modification.
    * 2. Redistributions in binary form must reproduce at minimum a disclaimer
    *    substantially similar to the "NO WARRANTY" disclaimer below
    *    ("Disclaimer") and any redistribution must be conditioned upon
    *    including a substantially similar Disclaimer requirement for further
    *    binary redistribution.
    * 3. Neither the names of the above-listed copyright holders nor the names
    *    of any contributors may be used to endorse or promote products derived
    *    from this software without specific prior written permission.
    *
    * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
    * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    *
    * Alternatively, you may choose to be licensed under the terms of the
    * GNU General Public License ("GPL") version 2 as published by the Free
    * Software Foundation.
    *
    *****************************************************************************/
   
   #include <contrib/dev/acpica/include/acpi.h>
   #include <contrib/dev/acpica/include/accommon.h>
   #include <contrib/dev/acpica/include/amlcode.h>
   #include <contrib/dev/acpica/include/acdispat.h>
   #include <contrib/dev/acpica/include/acinterp.h>
   #include <contrib/dev/acpica/include/acnamesp.h>
   #include <contrib/dev/acpica/include/acparser.h>
   
   #if !defined(ACPI_DB_APP) && defined(ACPI_EXEC_APP)
   #include "aecommon.h"
   #endif
   
   
   #define _COMPONENT          ACPI_DISPATCHER
           ACPI_MODULE_NAME    ("dsfield")
   
   /* Local prototypes */
   
   #ifdef ACPI_ASL_COMPILER
   #include <contrib/dev/acpica/include/acdisasm.h>
   
   static ACPI_STATUS
   AcpiDsCreateExternalRegion (
       ACPI_STATUS             LookupStatus,
       ACPI_PARSE_OBJECT       *Op,
       char                    *Path,
       ACPI_WALK_STATE         *WalkState,
       ACPI_NAMESPACE_NODE     **Node);
   #endif
   
   static ACPI_STATUS
   AcpiDsGetFieldNames (
       ACPI_CREATE_FIELD_INFO  *Info,
       ACPI_WALK_STATE         *WalkState,
       ACPI_PARSE_OBJECT       *Arg);
   
   
   #ifdef ACPI_ASL_COMPILER
   /*******************************************************************************
    *
    * FUNCTION:    AcpiDsCreateExternalRegion (iASL Disassembler only)
    *
    * PARAMETERS:  LookupStatus    - Status from NsLookup operation
    *              Op              - Op containing the Field definition and args
    *              Path            - Pathname of the region
    *  `           WalkState       - Current method state
    *              Node            - Where the new region node is returned
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Add region to the external list if NOT_FOUND. Create a new
    *              region node/object.
    *
    ******************************************************************************/
   
   static ACPI_STATUS
   AcpiDsCreateExternalRegion (
       ACPI_STATUS             LookupStatus,
       ACPI_PARSE_OBJECT       *Op,
       char                    *Path,
       ACPI_WALK_STATE         *WalkState,
       ACPI_NAMESPACE_NODE     **Node)
   {
       ACPI_STATUS             Status;
       ACPI_OPERAND_OBJECT     *ObjDesc;
   
   
       if (LookupStatus != AE_NOT_FOUND)
       {
           return (LookupStatus);
       }
   
       /*
        * Table disassembly:
        * OperationRegion not found. Generate an External for it, and
        * insert the name into the namespace.
        */
       AcpiDmAddOpToExternalList (Op, Path, ACPI_TYPE_REGION, 0, 0);
   
       Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_REGION,
          ACPI_IMODE_LOAD_PASS1, ACPI_NS_SEARCH_PARENT, WalkState, Node);
       if (ACPI_FAILURE (Status))
       {
           return (Status);
       }
   
       /* Must create and install a region object for the new node */
   
       ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_REGION);
       if (!ObjDesc)
       {
           return (AE_NO_MEMORY);
       }
   
       ObjDesc->Region.Node = *Node;
       Status = AcpiNsAttachObject (*Node, ObjDesc, ACPI_TYPE_REGION);
       return (Status);
   }
   #endif
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiDsCreateBufferField
    *
    * PARAMETERS:  Op                  - Current parse op (CreateXXField)
    *              WalkState           - Current state
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Execute the CreateField operators:
    *              CreateBitFieldOp,
    *              CreateByteFieldOp,
    *              CreateWordFieldOp,
    *              CreateDwordFieldOp,
    *              CreateQwordFieldOp,
    *              CreateFieldOp       (all of which define a field in a buffer)
    *
    ******************************************************************************/
   
   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;
   
   
       ACPI_FUNCTION_TRACE (DsCreateBufferField);
   
   
       /*
        * Get the NameString argument (name of the new BufferField)
        */
       if (Op->Common.AmlOpcode == AML_CREATE_FIELD_OP)
       {
           /* For CreateField, name is the 4th argument */
   
           Arg = AcpiPsGetArg (Op, 3);
       }
       else
       {
           /* For all other CreateXXXField operators, name is the 3rd argument */
   
           Arg = AcpiPsGetArg (Op, 2);
       }
   
       if (!Arg)
       {
           return_ACPI_STATUS (AE_AML_NO_OPERAND);
       }
   
       if (WalkState->DeferredNode)
       {
           Node = WalkState->DeferredNode;
       }
       else
       {
           /* Execute flag should always be set when this function is entered */
   
           if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE))
           {
               ACPI_ERROR ((AE_INFO,
                   "Parse execute mode is not set"));
               return_ACPI_STATUS (AE_AML_INTERNAL);
           }
   
           /* Creating new namespace node, should not already exist */
   
           Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
               ACPI_NS_ERROR_IF_FOUND;
   
           /*
            * Mark node temporary if we are executing a normal control
            * method. (Don't mark if this is a module-level code method)
            */
           if (WalkState->MethodNode &&
               !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL))
           {
               Flags |= ACPI_NS_TEMPORARY;
           }
   
           /* Enter the NameString into the namespace */
   
           Status = AcpiNsLookup (WalkState->ScopeInfo,
               Arg->Common.Value.String, ACPI_TYPE_ANY,
               ACPI_IMODE_LOAD_PASS1, Flags, WalkState, &Node);
           if ((WalkState->ParseFlags & ACPI_PARSE_DISASSEMBLE) &&
               Status == AE_ALREADY_EXISTS)
           {
               Status = AE_OK;
           }
           else if (ACPI_FAILURE (Status))
           {
               ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo,
                   Arg->Common.Value.String, 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->Common.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 = Op->Named.Data;
       SecondDesc->Extra.AmlLength = Op->Named.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.
    *
    ******************************************************************************/
   
   static ACPI_STATUS
   AcpiDsGetFieldNames (
       ACPI_CREATE_FIELD_INFO  *Info,
       ACPI_WALK_STATE         *WalkState,
       ACPI_PARSE_OBJECT       *Arg)
   {
       ACPI_STATUS             Status;
       UINT64                  Position;
       ACPI_PARSE_OBJECT       *Child;
   
   #if !defined(ACPI_DB_APP) && defined(ACPI_EXEC_APP)
       ACPI_OPERAND_OBJECT     *ResultDesc;
       ACPI_OPERAND_OBJECT     *ObjDesc;
       char                    *NamePath;
   #endif
   
   
       ACPI_FUNCTION_TRACE_PTR (DsGetFieldNames, Info);
   
   
       /* First field starts at bit zero */
   
       Info->FieldBitPosition = 0;
   
       /* Process all elements in the field list (of parse nodes) */
   
       while (Arg)
       {
           /*
            * Four types of field elements are handled:
            * 1) Name - Enters a new named field into the namespace
            * 2) Offset - specifies a bit offset
            * 3) AccessAs - changes the access mode/attributes
            * 4) Connection - Associate a resource template with the field
            */
           switch (Arg->Common.AmlOpcode)
           {
           case AML_INT_RESERVEDFIELD_OP:
   
               Position = (UINT64) Info->FieldBitPosition +
                   (UINT64) Arg->Common.Value.Size;
   
               if (Position > ACPI_UINT32_MAX)
               {
                   ACPI_ERROR ((AE_INFO,
                       "Bit offset within field too large (> 0xFFFFFFFF)"));
                   return_ACPI_STATUS (AE_SUPPORT);
               }
   
               Info->FieldBitPosition = (UINT32) Position;
               break;
   
           case AML_INT_ACCESSFIELD_OP:
           case AML_INT_EXTACCESSFIELD_OP:
               /*
                * Get new AccessType, AccessAttribute, and AccessLength fields
                * -- to be used for all field units that follow, until the
                * end-of-field or another AccessAs keyword is encountered.
                * NOTE. These three bytes are encoded in the integer value
                * of the parseop for convenience.
                *
                * In FieldFlags, preserve the flag bits other than the
                * ACCESS_TYPE bits.
                */
   
               /* AccessType (ByteAcc, WordAcc, etc.) */
   
               Info->FieldFlags = (UINT8)
                   ((Info->FieldFlags & ~(AML_FIELD_ACCESS_TYPE_MASK)) |
                   ((UINT8) ((UINT32) (Arg->Common.Value.Integer & 0x07))));
   
               /* AccessAttribute (AttribQuick, AttribByte, etc.) */
   
               Info->Attribute = (UINT8)
                   ((Arg->Common.Value.Integer >> 8) & 0xFF);
   
               /* AccessLength (for serial/buffer protocols) */
   
               Info->AccessLength = (UINT8)
                   ((Arg->Common.Value.Integer >> 16) & 0xFF);
               break;
   
           case AML_INT_CONNECTION_OP:
               /*
                * Clear any previous connection. New connection is used for all
                * fields that follow, similar to AccessAs
                */
               Info->ResourceBuffer = NULL;
               Info->ConnectionNode = NULL;
               Info->PinNumberIndex = 0;
   
               /*
                * A Connection() is either an actual resource descriptor (buffer)
                * or a named reference to a resource template
                */
               Child = Arg->Common.Value.Arg;
               if (Child->Common.AmlOpcode == AML_INT_BYTELIST_OP)
               {
                   Info->ResourceBuffer = Child->Named.Data;
                   Info->ResourceLength = (UINT16) Child->Named.Value.Integer;
               }
               else
               {
                   /* Lookup the Connection() namepath, it should already exist */
   
                   Status = AcpiNsLookup (WalkState->ScopeInfo,
                       Child->Common.Value.Name, ACPI_TYPE_ANY,
                       ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE,
                       WalkState, &Info->ConnectionNode);
                   if (ACPI_FAILURE (Status))
                   {
                       ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo,
                           Child->Common.Value.Name, Status);
                       return_ACPI_STATUS (Status);
                   }
               }
               break;
   
           case AML_INT_NAMEDFIELD_OP:
   
               /* Lookup the name, it should already exist */
   
               Status = AcpiNsLookup (WalkState->ScopeInfo,
                   (char *) &Arg->Named.Name, Info->FieldType,
                   ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE,
                   WalkState, &Info->FieldNode);
               if (ACPI_FAILURE (Status))
               {
                   ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo,
                       (char *) &Arg->Named.Name, Status);
                   return_ACPI_STATUS (Status);
               }
               else
               {
                   Arg->Common.Node = Info->FieldNode;
                   Info->FieldBitLength = Arg->Common.Value.Size;
   
                   /*
                    * 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.
                    */
                   if (!AcpiNsGetAttachedObject (Info->FieldNode))
                   {
                       Status = AcpiExPrepFieldValue (Info);
                       if (ACPI_FAILURE (Status))
                       {
                           return_ACPI_STATUS (Status);
                       }
   #if !defined(ACPI_DB_APP) && defined(ACPI_EXEC_APP)
                       NamePath = AcpiNsGetExternalPathname (Info->FieldNode);
                       if (ACPI_SUCCESS (AeLookupInitFileEntry (NamePath, &ObjDesc)))
                       {
                           AcpiExWriteDataToField (ObjDesc,
                               AcpiNsGetAttachedObject (Info->FieldNode),
                               &ResultDesc);
                           AcpiUtRemoveReference (ObjDesc);
                       }
                       ACPI_FREE (NamePath);
   #endif
                   }
               }
   
               /* Keep track of bit position for the next field */
   
               Position = (UINT64) Info->FieldBitPosition +
                   (UINT64) Arg->Common.Value.Size;
   
               if (Position > ACPI_UINT32_MAX)
               {
                   ACPI_ERROR ((AE_INFO,
                       "Field [%4.4s] bit offset too large (> 0xFFFFFFFF)",
                       ACPI_CAST_PTR (char, &Info->FieldNode->Name)));
                   return_ACPI_STATUS (AE_SUPPORT);
               }
   
               Info->FieldBitPosition += Info->FieldBitLength;
               Info->PinNumberIndex++; /* Index relative to previous Connection() */
               break;
   
           default:
   
               ACPI_ERROR ((AE_INFO,
                   "Invalid opcode in field list: 0x%X",
                   Arg->Common.AmlOpcode));
               return_ACPI_STATUS (AE_AML_BAD_OPCODE);
           }
   
           Arg = Arg->Common.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;
       ACPI_PARSE_OBJECT       *Arg;
       ACPI_CREATE_FIELD_INFO  Info;
   
   
       ACPI_FUNCTION_TRACE_PTR (DsCreateField, Op);
   
   
       /* First arg is the name of the parent OpRegion (must already exist) */
   
       Arg = Op->Common.Value.Arg;
   
       if (!RegionNode)
       {
           Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name,
               ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE,
               ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode);
   #ifdef ACPI_ASL_COMPILER
           Status = AcpiDsCreateExternalRegion (Status, Arg,
               Arg->Common.Value.Name, WalkState, &RegionNode);
   #endif
           if (ACPI_FAILURE (Status))
           {
               ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo,
                   Arg->Common.Value.Name, Status);
               return_ACPI_STATUS (Status);
           }
       }
   
       memset (&Info, 0, sizeof (ACPI_CREATE_FIELD_INFO));
   
       /* Second arg is the field flags */
   
       Arg = Arg->Common.Next;
       Info.FieldFlags = (UINT8) Arg->Common.Value.Integer;
       Info.Attribute = 0;
   
       /* Each remaining arg is a Named Field */
   
       Info.FieldType = ACPI_TYPE_LOCAL_REGION_FIELD;
       Info.RegionNode = RegionNode;
   
       Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next);
       if (ACPI_FAILURE (Status))
       {
           return_ACPI_STATUS (Status);
       }
   
       if (Info.RegionNode->Object->Region.SpaceId == ACPI_ADR_SPACE_PLATFORM_COMM)
       {
           RegionNode->Object->Field.InternalPccBuffer =
               ACPI_ALLOCATE_ZEROED(Info.RegionNode->Object->Region.Length);
           if (!RegionNode->Object->Field.InternalPccBuffer)
           {
               return_ACPI_STATUS (AE_NO_MEMORY);
           }
       }
   
       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;
       ACPI_PARSE_OBJECT       *Arg = NULL;
       ACPI_NAMESPACE_NODE     *Node;
       UINT8                   Type = 0;
       UINT32                  Flags;
   
   
       ACPI_FUNCTION_TRACE_PTR (DsInitFieldObjects, Op);
   
   
       /* Execute flag should always be set when this function is entered */
   
       if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE))
       {
           if (WalkState->ParseFlags & ACPI_PARSE_DEFERRED_OP)
           {
               /* BankField Op is deferred, just return OK */
   
               return_ACPI_STATUS (AE_OK);
           }
   
           ACPI_ERROR ((AE_INFO,
               "Parse deferred mode is not set"));
           return_ACPI_STATUS (AE_AML_INTERNAL);
       }
   
       /*
        * Get the FieldList argument for this opcode. This is the start of the
        * list of field elements.
        */
       switch (WalkState->Opcode)
       {
       case AML_FIELD_OP:
   
           Arg = AcpiPsGetArg (Op, 2);
           Type = ACPI_TYPE_LOCAL_REGION_FIELD;
           break;
   
       case AML_BANK_FIELD_OP:
   
           Arg = AcpiPsGetArg (Op, 4);
           Type = ACPI_TYPE_LOCAL_BANK_FIELD;
           break;
   
       case AML_INDEX_FIELD_OP:
   
           Arg = AcpiPsGetArg (Op, 3);
           Type = ACPI_TYPE_LOCAL_INDEX_FIELD;
           break;
   
       default:
   
           return_ACPI_STATUS (AE_BAD_PARAMETER);
       }
   
       /* Creating new namespace node(s), should not already exist */
   
       Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
           ACPI_NS_ERROR_IF_FOUND;
   
       /*
        * Mark node(s) temporary if we are executing a normal control
        * method. (Don't mark if this is a module-level code method)
        */
       if (WalkState->MethodNode &&
           !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL))
       {
           Flags |= ACPI_NS_TEMPORARY;
       }
   
   #ifdef ACPI_EXEC_APP
       Flags |= ACPI_NS_OVERRIDE_IF_FOUND;
   #endif
       /*
        * Walk the list of entries in the FieldList
        * Note: FieldList can be of zero length. In this case, Arg will be NULL.
        */
       while (Arg)
       {
           /*
            * Ignore OFFSET/ACCESSAS/CONNECTION terms here; we are only interested
            * in the field names in order to enter them into the namespace.
            */
           if (Arg->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP)
           {
               Status = AcpiNsLookup (WalkState->ScopeInfo,
                   (char *) &Arg->Named.Name, Type, ACPI_IMODE_LOAD_PASS1,
                   Flags, WalkState, &Node);
               if (ACPI_FAILURE (Status))
               {
                   ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo,
                       (char *) &Arg->Named.Name, Status);
                   if (Status != AE_ALREADY_EXISTS)
                   {
                       return_ACPI_STATUS (Status);
                   }
   
                   /* Name already exists, just ignore this error */
               }
   
               Arg->Common.Node = Node;
           }
   
           /* Get the next field element in the list */
   
           Arg = Arg->Common.Next;
       }
   
       return_ACPI_STATUS (AE_OK);
   }
   
   
   /*******************************************************************************
    *
    * 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;
       ACPI_PARSE_OBJECT       *Arg;
       ACPI_CREATE_FIELD_INFO  Info;
   
   
       ACPI_FUNCTION_TRACE_PTR (DsCreateBankField, Op);
   
   
       /* First arg is the name of the parent OpRegion (must already exist) */
   
       Arg = Op->Common.Value.Arg;
       if (!RegionNode)
       {
           Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name,
               ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE,
               ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode);
   #ifdef ACPI_ASL_COMPILER
           Status = AcpiDsCreateExternalRegion (Status, Arg,
               Arg->Common.Value.Name, WalkState, &RegionNode);
   #endif
           if (ACPI_FAILURE (Status))
           {
               ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo,
                   Arg->Common.Value.Name, Status);
               return_ACPI_STATUS (Status);
           }
       }
   
       /* Second arg is the Bank Register (Field) (must already exist) */
   
       Arg = Arg->Common.Next;
       Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
           ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
           ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode);
       if (ACPI_FAILURE (Status))
       {
           ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo,
               Arg->Common.Value.String, Status);
           return_ACPI_STATUS (Status);
       }
   
       /*
        * Third arg is the BankValue
        * This arg is a TermArg, not a constant
        * It will be evaluated later, by AcpiDsEvalBankFieldOperands
        */
       Arg = Arg->Common.Next;
   
       /* Fourth arg is the field flags */
   
       Arg = Arg->Common.Next;
       Info.FieldFlags = (UINT8) Arg->Common.Value.Integer;
   
       /* Each remaining arg is a Named Field */
   
       Info.FieldType = ACPI_TYPE_LOCAL_BANK_FIELD;
       Info.RegionNode = RegionNode;
   
       /*
        * Use Info.DataRegisterNode to store BankField Op
        * It's safe because DataRegisterNode will never be used when create
        * bank field \we store AmlStart and AmlLength in the BankField Op for
        * late evaluation. Used in AcpiExPrepFieldValue(Info)
        *
        * TBD: Or, should we add a field in ACPI_CREATE_FIELD_INFO, like
        * "void *ParentOp"?
        */
       Info.DataRegisterNode = (ACPI_NAMESPACE_NODE*) Op;
   
       Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.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;
   
   
       ACPI_FUNCTION_TRACE_PTR (DsCreateIndexField, Op);
   
   
       /* First arg is the name of the Index register (must already exist) */
   
       Arg = Op->Common.Value.Arg;
       Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
           ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
           ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode);
       if (ACPI_FAILURE (Status))
       {
           ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo,
               Arg->Common.Value.String, Status);
           return_ACPI_STATUS (Status);
       }
   
       /* Second arg is the data register (must already exist) */
   
       Arg = Arg->Common.Next;
       Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
           ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
           ACPI_NS_SEARCH_PARENT, WalkState, &Info.DataRegisterNode);
       if (ACPI_FAILURE (Status))
       {
           ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo,
               Arg->Common.Value.String, Status);
           return_ACPI_STATUS (Status);
       }
   
       /* Next arg is the field flags */
   
       Arg = Arg->Common.Next;
       Info.FieldFlags = (UINT8) Arg->Common.Value.Integer;
   
       /* Each remaining arg is a Named Field */
   
       Info.FieldType = ACPI_TYPE_LOCAL_INDEX_FIELD;
       Info.RegionNode = RegionNode;
   
       Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next);
      return_ACPI_STATUS (Status);
  }

Cache object: 72e5f144172392f3126441601c2ebe64