FreeBSD/Linux Kernel Cross Reference
sys/contrib/dev/acpica/compiler/dtutils.c

     /******************************************************************************
      *
      * Module Name: dtutils.c - Utility routines for the data table compiler
      *
      *****************************************************************************/
     
     /******************************************************************************
      *
      * 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/compiler/aslcompiler.h>
   #include <contrib/dev/acpica/include/actables.h>
   
   #define _COMPONENT          DT_COMPILER
           ACPI_MODULE_NAME    ("dtutils")
   
   /* Local prototypes */
   
   static void
   DtSum (
       DT_SUBTABLE             *Subtable,
       void                    *Context,
       void                    *ReturnValue);
   
   
   /******************************************************************************
    *
    * FUNCTION:    DtError
    *
    * PARAMETERS:  Level               - Seriousness (Warning/error, etc.)
    *              MessageId           - Index into global message buffer
    *              Op                  - Parse node where error happened
    *              ExtraMessage        - additional error message
    *
    * RETURN:      None
    *
    * DESCRIPTION: Common error interface for data table compiler
    *
    *****************************************************************************/
   
   void
   DtError (
       UINT8                   Level,
       UINT16                  MessageId,
       DT_FIELD                *FieldObject,
       char                    *ExtraMessage)
   {
       UINT32                  Line = 0;
   
   
       /* Field object could be NULL */
   
       if (FieldObject)
       {
           Line = FieldObject->Line;
       }
   
       /* Check if user wants to ignore this exception */
   
       if (AslIsExceptionIgnored (AslGbl_Files[ASL_FILE_INPUT].Filename,
           Line, Level, MessageId))
       {
           return;
       }
   
       if (FieldObject)
       {
           AslCommonError (Level, MessageId,
               FieldObject->Line,
               FieldObject->Line,
               FieldObject->ByteOffset,
               FieldObject->Column,
               AslGbl_Files[ASL_FILE_INPUT].Filename, ExtraMessage);
       }
       else
       {
           AslCommonError (Level, MessageId, 0,
               0, 0, 0, 0, ExtraMessage);
       }
   }
   
   
   /******************************************************************************
    *
    * FUNCTION:    DtNameError
    *
    * PARAMETERS:  Level               - Seriousness (Warning/error, etc.)
    *              MessageId           - Index into global message buffer
    *              Op                  - Parse node where error happened
    *              ExtraMessage        - additional error message
    *
    * RETURN:      None
    *
    * DESCRIPTION: Error interface for named objects
    *
    *****************************************************************************/
   
   void
   DtNameError (
       UINT8                   Level,
       UINT16                  MessageId,
       DT_FIELD                *FieldObject,
       char                    *ExtraMessage)
   {
   
       switch (Level)
       {
       case ASL_WARNING2:
       case ASL_WARNING3:
   
           if (AslGbl_WarningLevel < Level)
           {
               return;
           }
           break;
   
       default:
   
           break;
       }
   
       if (FieldObject)
       {
           AslCommonError (Level, MessageId,
               FieldObject->Line,
               FieldObject->Line,
               FieldObject->ByteOffset,
               FieldObject->NameColumn,
               AslGbl_Files[ASL_FILE_INPUT].Filename, ExtraMessage);
       }
       else
       {
           AslCommonError (Level, MessageId, 0,
               0, 0, 0, 0, ExtraMessage);
       }
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    DtFatal
    *
    * PARAMETERS:  None
    *
    * RETURN:      None
    *
    * DESCRIPTION: Dump the error log and abort the compiler. Used for serious
    *              compile or I/O errors
    *
    ******************************************************************************/
   
   void
   DtFatal (
       UINT16                  MessageId,
       DT_FIELD                *FieldObject,
       char                    *ExtraMessage)
   {
   
       DtError (ASL_ERROR, MessageId, FieldObject, ExtraMessage);
   
   /*
    * TBD: remove this entire function, DtFatal
    *
    * We cannot abort the compiler on error, because we may be compiling a
    * list of files. We must move on to the next file.
    */
   #ifdef __OBSOLETE
       CmCleanupAndExit ();
       exit (1);
   #endif
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    DtDoConstant
    *
    * PARAMETERS:  String              - Only hex constants are supported,
    *                                    regardless of whether the 0x prefix
    *                                    is used
    *
    * RETURN:      Converted Integer
    *
    * DESCRIPTION: Convert a string to an integer, with overflow/error checking.
    *
    ******************************************************************************/
   
   UINT64
   DtDoConstant (
       char                    *String)
   {
       UINT64                  ConvertedInteger;
   
   
       /*
        * TBD: The ImplicitStrtoul64 function does not report overflow
        * conditions. The input string is simply truncated. If it is
        * desired to report overflow to the table compiler, this should
        * somehow be added here. Note: integers that are prefixed with 0x
        * or not are both hex integers.
        */
       ConvertedInteger = AcpiUtImplicitStrtoul64 (String);
       return (ConvertedInteger);
   }
   
   /******************************************************************************
    *
    * FUNCTION:    DtGetFieldValue
    *
    * PARAMETERS:  Field               - Current field list pointer
    *
    * RETURN:      Field value
    *
    * DESCRIPTION: Get field value
    *
    *****************************************************************************/
   
   char *
   DtGetFieldValue (
       DT_FIELD                *Field)
   {
       if (!Field)
       {
           return (NULL);
       }
   
       return (Field->Value);
   }
   
   
   /******************************************************************************
    *
    * FUNCTION:    DtGetFieldType
    *
    * PARAMETERS:  Info                - Data table info
    *
    * RETURN:      Field type
    *
    * DESCRIPTION: Get field type
    *
    *****************************************************************************/
   
   UINT8
   DtGetFieldType (
       ACPI_DMTABLE_INFO       *Info)
   {
       UINT8                   Type;
   
   
       /* DT_FLAG means that this is the start of a block of flag bits */
       /* TBD - we can make these a separate opcode later */
   
       if (Info->Flags & DT_FLAG)
       {
           return (DT_FIELD_TYPE_FLAGS_INTEGER);
       }
   
       /* Type is based upon the opcode for this field in the info table */
   
       switch (Info->Opcode)
       {
       case ACPI_DMT_FLAG0:
       case ACPI_DMT_FLAG1:
       case ACPI_DMT_FLAG2:
       case ACPI_DMT_FLAG3:
       case ACPI_DMT_FLAG4:
       case ACPI_DMT_FLAG5:
       case ACPI_DMT_FLAG6:
       case ACPI_DMT_FLAG7:
       case ACPI_DMT_FLAGS0:
       case ACPI_DMT_FLAGS1:
       case ACPI_DMT_FLAGS2:
       case ACPI_DMT_FLAGS8_2:
       case ACPI_DMT_FLAGS4:
       case ACPI_DMT_FLAGS4_0:
       case ACPI_DMT_FLAGS4_4:
       case ACPI_DMT_FLAGS4_8:
       case ACPI_DMT_FLAGS4_12:
       case ACPI_DMT_FLAGS16_16:
   
           Type = DT_FIELD_TYPE_FLAG;
           break;
   
       case ACPI_DMT_NAME4:
       case ACPI_DMT_SIG:
       case ACPI_DMT_NAME6:
       case ACPI_DMT_NAME8:
       case ACPI_DMT_STRING:
       case ACPI_DMT_IVRS_UNTERMINATED_STRING:
   
           Type = DT_FIELD_TYPE_STRING;
           break;
   
       case ACPI_DMT_BUFFER:
       case ACPI_DMT_RAW_BUFFER:
       case ACPI_DMT_BUF7:
       case ACPI_DMT_BUF10:
       case ACPI_DMT_BUF12:
       case ACPI_DMT_BUF16:
       case ACPI_DMT_BUF18:
       case ACPI_DMT_BUF128:
       case ACPI_DMT_PCI_PATH:
       case ACPI_DMT_PMTT_VENDOR:
   
           Type = DT_FIELD_TYPE_BUFFER;
           break;
   
       case ACPI_DMT_GAS:
       case ACPI_DMT_HESTNTFY:
       case ACPI_DMT_IORTMEM:
   
           Type = DT_FIELD_TYPE_INLINE_SUBTABLE;
           break;
   
       case ACPI_DMT_UNICODE:
       case ACPI_DMT_WPBT_UNICODE:
   
           Type = DT_FIELD_TYPE_UNICODE;
           break;
   
       case ACPI_DMT_UUID:
   
           Type = DT_FIELD_TYPE_UUID;
           break;
   
       case ACPI_DMT_DEVICE_PATH:
   
           Type = DT_FIELD_TYPE_DEVICE_PATH;
           break;
   
       case ACPI_DMT_LABEL:
   
           Type = DT_FIELD_TYPE_LABEL;
           break;
   
       default:
   
           Type = DT_FIELD_TYPE_INTEGER;
           break;
       }
   
       return (Type);
   }
   
   
   /******************************************************************************
    *
    * FUNCTION:    DtGetBufferLength
    *
    * PARAMETERS:  Buffer              - List of integers,
    *                                    for example "10 3A 4F 2E"
    *
    * RETURN:      Count of integer
    *
    * DESCRIPTION: Get length of bytes needed to store the integers
    *
    *****************************************************************************/
   
   UINT32
   DtGetBufferLength (
       char                    *Buffer)
   {
       UINT32                  ByteLength = 0;
   
   
       while (*Buffer)
       {
           if (*Buffer == ' ')
           {
               ByteLength++;
   
               while (*Buffer == ' ')
               {
                   Buffer++;
               }
           }
   
           Buffer++;
       }
   
       return (++ByteLength);
   }
   
   
   /******************************************************************************
    *
    * FUNCTION:    DtGetFieldLength
    *
    * PARAMETERS:  Field               - Current field
    *              Info                - Data table info
    *
    * RETURN:      Field length
    *
    * DESCRIPTION: Get length of bytes needed to compile the field
    *
    * Note: This function must remain in sync with AcpiDmDumpTable.
    *
    *****************************************************************************/
   
   UINT32
   DtGetFieldLength (
       DT_FIELD                *Field,
       ACPI_DMTABLE_INFO       *Info)
   {
       UINT32                  ByteLength = 0;
       char                    *Value;
   
   
       /* Length is based upon the opcode for this field in the info table */
   
       switch (Info->Opcode)
       {
       case ACPI_DMT_FLAG0:
       case ACPI_DMT_FLAG1:
       case ACPI_DMT_FLAG2:
       case ACPI_DMT_FLAG3:
       case ACPI_DMT_FLAG4:
       case ACPI_DMT_FLAG5:
       case ACPI_DMT_FLAG6:
       case ACPI_DMT_FLAG7:
       case ACPI_DMT_FLAGS0:
       case ACPI_DMT_FLAGS1:
       case ACPI_DMT_FLAGS2:
       case ACPI_DMT_FLAGS8_2:
       case ACPI_DMT_FLAGS4:
       case ACPI_DMT_FLAGS4_0:
       case ACPI_DMT_FLAGS4_4:
       case ACPI_DMT_FLAGS4_8:
       case ACPI_DMT_FLAGS4_12:
       case ACPI_DMT_FLAGS16_16:
       case ACPI_DMT_LABEL:
       case ACPI_DMT_EXTRA_TEXT:
   
           ByteLength = 0;
           break;
   
       case ACPI_DMT_UINT8:
       case ACPI_DMT_CHKSUM:
       case ACPI_DMT_SPACEID:
       case ACPI_DMT_ACCWIDTH:
       case ACPI_DMT_CEDT:
       case ACPI_DMT_IVRS:
       case ACPI_DMT_IVRS_DE:
       case ACPI_DMT_GTDT:
       case ACPI_DMT_MADT:
       case ACPI_DMT_NHLT1:
       case ACPI_DMT_NHLT1a:
       case ACPI_DMT_NHLT1b:
       case ACPI_DMT_NHLT1c:
       case ACPI_DMT_NHLT1d:
       case ACPI_DMT_NHLT1f:
       case ACPI_DMT_PCCT:
       case ACPI_DMT_PMTT:
       case ACPI_DMT_PPTT:
       case ACPI_DMT_RGRT:
       case ACPI_DMT_SDEV:
       case ACPI_DMT_SRAT:
       case ACPI_DMT_AEST:
       case ACPI_DMT_AEST_RES:
       case ACPI_DMT_AEST_XFACE:
       case ACPI_DMT_AEST_XRUPT:
       case ACPI_DMT_ASF:
       case ACPI_DMT_CDAT:
       case ACPI_DMT_HESTNTYP:
       case ACPI_DMT_FADTPM:
       case ACPI_DMT_EINJACT:
       case ACPI_DMT_EINJINST:
       case ACPI_DMT_ERSTACT:
       case ACPI_DMT_ERSTINST:
       case ACPI_DMT_DMAR_SCOPE:
       case ACPI_DMT_VIOT:
   
           ByteLength = 1;
           break;
   
       case ACPI_DMT_UINT16:
       case ACPI_DMT_DMAR:
       case ACPI_DMT_HEST:
       case ACPI_DMT_HMAT:
       case ACPI_DMT_NFIT:
       case ACPI_DMT_NHLT1e:
       case ACPI_DMT_PCI_PATH:
       case ACPI_DMT_PHAT:
   
           ByteLength = 2;
           break;
   
       case ACPI_DMT_UINT24:
   
           ByteLength = 3;
           break;
   
       case ACPI_DMT_UINT32:
       case ACPI_DMT_AEST_CACHE:
       case ACPI_DMT_AEST_GIC:
       case ACPI_DMT_NAME4:
       case ACPI_DMT_SIG:
       case ACPI_DMT_LPIT:
       case ACPI_DMT_TPM2:
   
           ByteLength = 4;
           break;
   
       case ACPI_DMT_UINT40:
   
           ByteLength = 5;
           break;
   
       case ACPI_DMT_UINT48:
       case ACPI_DMT_NAME6:
   
           ByteLength = 6;
           break;
   
       case ACPI_DMT_UINT56:
       case ACPI_DMT_BUF7:
   
           ByteLength = 7;
           break;
   
       case ACPI_DMT_UINT64:
       case ACPI_DMT_NAME8:
   
           ByteLength = 8;
           break;
   
       case ACPI_DMT_STRING:
   
           Value = DtGetFieldValue (Field);
           if (Value)
           {
               ByteLength = strlen (Value) + 1;
           }
           else
           {   /* At this point, this is a fatal error */
   
               sprintf (AslGbl_MsgBuffer, "Expected \"%s\"", Info->Name);
               DtFatal (ASL_MSG_COMPILER_INTERNAL, NULL, AslGbl_MsgBuffer);
               return (0);
           }
           break;
   
       case ACPI_DMT_IVRS_UNTERMINATED_STRING:
   
           Value = DtGetFieldValue (Field);
           if (Value)
           {
               ByteLength = strlen (Value);
           }
           else
           {   /* At this point, this is a fatal error */
   
               sprintf (AslGbl_MsgBuffer, "Expected \"%s\"", Info->Name);
               DtFatal (ASL_MSG_COMPILER_INTERNAL, NULL, AslGbl_MsgBuffer);
               return (0);
           }
           break;
   
       case ACPI_DMT_GAS:
   
           ByteLength = sizeof (ACPI_GENERIC_ADDRESS);
           break;
   
       case ACPI_DMT_HESTNTFY:
   
           ByteLength = sizeof (ACPI_HEST_NOTIFY);
           break;
   
       case ACPI_DMT_IORTMEM:
   
           ByteLength = sizeof (ACPI_IORT_MEMORY_ACCESS);
           break;
   
       case ACPI_DMT_BUFFER:
       case ACPI_DMT_RAW_BUFFER:
       case ACPI_DMT_PMTT_VENDOR:
   
           Value = DtGetFieldValue (Field);
           if (Value)
           {
               ByteLength = DtGetBufferLength (Value);
           }
           else
           {   /* At this point, this is a fatal error */
   
               sprintf (AslGbl_MsgBuffer, "Expected \"%s\"", Info->Name);
               DtFatal (ASL_MSG_COMPILER_INTERNAL, NULL, AslGbl_MsgBuffer);
               return (0);
           }
           break;
   
       case ACPI_DMT_BUF10:
   
           ByteLength = 10;
           break;
   
       case ACPI_DMT_BUF12:
   
           ByteLength = 12;
           break;
   
       case ACPI_DMT_BUF16:
       case ACPI_DMT_UUID:
   
           ByteLength = 16;
           break;
   
       case ACPI_DMT_BUF18:
   
           ByteLength = 18;
           break;
   
       case ACPI_DMT_BUF128:
   
           ByteLength = 128;
           break;
   
       case ACPI_DMT_UNICODE:
       case ACPI_DMT_WPBT_UNICODE:
   
           Value = DtGetFieldValue (Field);
   
           /* TBD: error if Value is NULL? (as below?) */
   
           ByteLength = (strlen (Value) + 1) * sizeof (UINT16);
           break;
   
       default:
   
           DtFatal (ASL_MSG_COMPILER_INTERNAL, Field, "Invalid table opcode");
           return (0);
       }
   
       return (ByteLength);
   }
   
   
   /******************************************************************************
    *
    * FUNCTION:    DtSum
    *
    * PARAMETERS:  DT_WALK_CALLBACK:
    *              Subtable            - Subtable
    *              Context             - Unused
    *              ReturnValue         - Store the checksum of subtable
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Get the checksum of subtable
    *
    *****************************************************************************/
   
   static void
   DtSum (
       DT_SUBTABLE             *Subtable,
       void                    *Context,
       void                    *ReturnValue)
   {
       UINT8                   Checksum;
       UINT8                   *Sum = ReturnValue;
   
   
       Checksum = AcpiUtChecksum (Subtable->Buffer, Subtable->Length);
       *Sum = (UINT8) (*Sum + Checksum);
   }
   
   
   /******************************************************************************
    *
    * FUNCTION:    DtSetTableChecksum
    *
    * PARAMETERS:  ChecksumPointer     - Where to return the checksum
    *
    * RETURN:      None
    *
    * DESCRIPTION: Set checksum of the whole data table into the checksum field
    *
    *****************************************************************************/
   
   void
   DtSetTableChecksum (
       UINT8                   *ChecksumPointer)
   {
       UINT8                   Checksum = 0;
       UINT8                   OldSum;
   
   
       DtWalkTableTree (AslGbl_RootTable, DtSum, NULL, &Checksum);
   
       OldSum = *ChecksumPointer;
       Checksum = (UINT8) (Checksum - OldSum);
   
       /* Compute the final checksum */
   
       Checksum = (UINT8) (0 - Checksum);
       *ChecksumPointer = Checksum;
   }
   
   
   /******************************************************************************
    *
    * FUNCTION:    DtSetTableLength
    *
    * PARAMETERS:  None
    *
    * RETURN:      None
    *
    * DESCRIPTION: Walk the subtables and set all the length fields
    *
    *****************************************************************************/
   
   void
   DtSetTableLength (
       void)
   {
       DT_SUBTABLE             *ParentTable;
       DT_SUBTABLE             *ChildTable;
   
   
       ParentTable = AslGbl_RootTable;
       ChildTable = NULL;
   
       if (!ParentTable)
       {
           return;
       }
   
       DtSetSubtableLength (ParentTable);
   
       while (1)
       {
           ChildTable = DtGetNextSubtable (ParentTable, ChildTable);
           if (ChildTable)
           {
               if (ChildTable->LengthField)
               {
                   DtSetSubtableLength (ChildTable);
               }
   
               if (ChildTable->Child)
               {
                   ParentTable = ChildTable;
                   ChildTable = NULL;
               }
               else
               {
                   ParentTable->TotalLength += ChildTable->TotalLength;
                   if (ParentTable->LengthField)
                   {
                       DtSetSubtableLength (ParentTable);
                   }
               }
           }
           else
           {
               ChildTable = ParentTable;
   
               if (ChildTable == AslGbl_RootTable)
               {
                   break;
               }
   
               ParentTable = DtGetParentSubtable (ParentTable);
   
               ParentTable->TotalLength += ChildTable->TotalLength;
               if (ParentTable->LengthField)
               {
                   DtSetSubtableLength (ParentTable);
               }
           }
       }
   }
   
   
   /******************************************************************************
    *
    * FUNCTION:    DtWalkTableTree
    *
    * PARAMETERS:  StartTable          - Subtable in the tree where walking begins
    *              UserFunction        - Called during the walk
    *              Context             - Passed to user function
    *              ReturnValue         - The return value of UserFunction
    *
    * RETURN:      None
    *
    * DESCRIPTION: Performs a depth-first walk of the subtable tree
    *
    *****************************************************************************/
   
   void
   DtWalkTableTree (
       DT_SUBTABLE             *StartTable,
       DT_WALK_CALLBACK        UserFunction,
       void                    *Context,
       void                    *ReturnValue)
   {
       DT_SUBTABLE             *ParentTable;
       DT_SUBTABLE             *ChildTable;
   
   
       ParentTable = StartTable;
       ChildTable = NULL;
   
       if (!ParentTable)
       {
           return;
       }
   
       UserFunction (ParentTable, Context, ReturnValue);
   
       while (1)
       {
           ChildTable = DtGetNextSubtable (ParentTable, ChildTable);
           if (ChildTable)
           {
               UserFunction (ChildTable, Context, ReturnValue);
   
               if (ChildTable->Child)
               {
                   ParentTable = ChildTable;
                   ChildTable = NULL;
               }
           }
           else
           {
               ChildTable = ParentTable;
               if (ChildTable == AslGbl_RootTable)
               {
                   break;
               }
   
               ParentTable = DtGetParentSubtable (ParentTable);
   
               if (ChildTable->Peer == StartTable)
               {
                   break;
               }
           }
       }
   }

Cache object: 601dfe2d95cfddfc6b03dffc0db3275c