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

     /******************************************************************************
      *
      * Module Name: aslcodegen - AML code generation
      *
      *****************************************************************************/
     
     /******************************************************************************
      *
      * 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 "aslcompiler.y.h"
   #include <contrib/dev/acpica/include/amlcode.h>
   #include <contrib/dev/acpica/include/acconvert.h>
   #include <contrib/dev/acpica/include/actbinfo.h>
   
   #define _COMPONENT          ACPI_COMPILER
           ACPI_MODULE_NAME    ("aslcodegen")
   
   /* Local prototypes */
   
   static ACPI_STATUS
   CgAmlWriteWalk (
       ACPI_PARSE_OBJECT       *Op,
       UINT32                  Level,
       void                    *Context);
   
   static void
   CgWriteAmlOpcode (
       ACPI_PARSE_OBJECT       *Op);
   
   static void
   CgWriteTableHeader (
       ACPI_PARSE_OBJECT       *Op);
   
   static void
   CgWriteNode (
       ACPI_PARSE_OBJECT       *Op);
   
   static void
   CgUpdateHeader (
       ACPI_PARSE_OBJECT       *Op);
   
   static void
   CgUpdateCdatHeader (
       ACPI_PARSE_OBJECT       *Op);
   
   
   /*******************************************************************************
    *
    * FUNCTION:    CgGenerateAmlOutput
    *
    * PARAMETERS:  None.
    *
    * RETURN:      None
    *
    * DESCRIPTION: Generate AML code. Currently generates the listing file
    *              simultaneously.
    *
    ******************************************************************************/
   
   void
   CgGenerateAmlOutput (
       void)
   {
   
       /* Generate the AML output file */
   
       TrWalkParseTree (AslGbl_CurrentDB,
           ASL_WALK_VISIT_DOWNWARD | ASL_WALK_VISIT_DB_SEPARATELY,
           CgAmlWriteWalk, NULL, NULL);
   
       DbgPrint (ASL_TREE_OUTPUT, ASL_PARSE_TREE_HEADER2);
       if (AcpiGbl_CDAT)
       {
           CgUpdateCdatHeader (AslGbl_CurrentDB);
       }
       else
       {
           CgUpdateHeader (AslGbl_CurrentDB);
       }
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    CgAmlWriteWalk
    *
    * PARAMETERS:  ASL_WALK_CALLBACK
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Parse tree walk to generate the AML code.
    *
    ******************************************************************************/
   
   static ACPI_STATUS
   CgAmlWriteWalk (
       ACPI_PARSE_OBJECT       *Op,
       UINT32                  Level,
       void                    *Context)
   {
   
       /* Generate the AML for this node */
   
       CgWriteNode (Op);
   
       if (!AslGbl_DebugFlag)
       {
           return (AE_OK);
       }
   
       /* Print header at level 0. Alignment assumes 32-bit pointers */
   
       if (!Level)
       {
           DbgPrint (ASL_TREE_OUTPUT,
               "\nFinal parse tree used for AML output:\n");
           DbgPrint (ASL_TREE_OUTPUT, ASL_PARSE_TREE_HEADER2);
       }
   
       /* Dump ParseOp name and possible value */
   
       switch (Op->Asl.ParseOpcode)
       {
       case PARSEOP_NAMESEG:
       case PARSEOP_NAMESTRING:
       case PARSEOP_METHODCALL:
       case PARSEOP_STRING_LITERAL:
   
           UtDumpStringOp (Op, Level);
           break;
   
       default:
   
           UtDumpBasicOp (Op, Level);
           break;
       }
   
       DbgPrint (ASL_TREE_OUTPUT, ASL_PARSE_TREE_DEBUG2,
           /* 1  */ (UINT32) Op->Asl.Value.Integer,
           /* 2  */ Op->Asl.ParseOpcode,
           /* 3  */ Op->Asl.AmlOpcode,
           /* 4  */ Op->Asl.AmlOpcodeLength,
           /* 5  */ Op->Asl.AmlPkgLenBytes,
           /* 6  */ Op->Asl.AmlLength,
           /* 7  */ Op->Asl.AmlSubtreeLength,
           /* 8  */ Op->Asl.Parent ? Op->Asl.Parent->Asl.AmlSubtreeLength : 0,
           /* 9  */ Op,
           /* 10 */ Op->Asl.Parent,
           /* 11 */ Op->Asl.Child,
           /* 12 */ Op->Asl.Next,
           /* 13 */ Op->Asl.CompileFlags,
           /* 14 */ Op->Asl.AcpiBtype,
           /* 15 */ Op->Asl.FinalAmlLength,
           /* 16 */ Op->Asl.Column,
           /* 17 */ Op->Asl.LineNumber,
           /* 18 */ Op->Asl.EndLine,
           /* 19 */ Op->Asl.LogicalLineNumber,
           /* 20 */ Op->Asl.EndLogicalLine);
   
       TrPrintOpFlags (Op->Asl.CompileFlags, ASL_TREE_OUTPUT);
       DbgPrint (ASL_TREE_OUTPUT, "\n");
       return (AE_OK);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    CgLocalWriteAmlData
    *
    * PARAMETERS:  Op              - Current parse op
    *              Buffer          - Buffer to write
    *              Length          - Size of data in buffer
    *
    * RETURN:      None
    *
    * DESCRIPTION: Write a buffer of AML data to the AML output file.
    *
    ******************************************************************************/
   
   void
   CgLocalWriteAmlData (
       ACPI_PARSE_OBJECT       *Op,
       void                    *Buffer,
       UINT32                  Length)
   {
   
       /* Write the raw data to the AML file */
   
       FlWriteFile (ASL_FILE_AML_OUTPUT, Buffer, Length);
   
       /* Update the final AML length for this node (used for listings) */
   
       if (Op)
       {
           Op->Asl.FinalAmlLength += Length;
       }
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    CgWriteAmlOpcode
    *
    * PARAMETERS:  Op            - Parse node with an AML opcode
    *
    * RETURN:      None.
    *
    * DESCRIPTION: Write the AML opcode corresponding to a parse node.
    *
    ******************************************************************************/
   
   static void
   CgWriteAmlOpcode (
       ACPI_PARSE_OBJECT       *Op)
   {
       UINT8                   PkgLenFirstByte;
       UINT32                  i;
       union {
           UINT16                  Opcode;
           UINT8                   OpcodeBytes[2];
       } Aml;
       union {
           UINT32                  Len;
           UINT8                   LenBytes[4];
       } PkgLen;
   
   
       /* We expect some DEFAULT_ARGs, just ignore them */
   
       if (Op->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG)
       {
           return;
       }
   
       /*
        * Before printing the bytecode, generate comment byte codes
        * associated with this node.
        */
       if (AcpiGbl_CaptureComments)
       {
           CgWriteAmlComment(Op);
       }
   
       switch (Op->Asl.AmlOpcode)
       {
       case AML_UNASSIGNED_OPCODE:
   
           /* These opcodes should not get here */
   
           printf ("Found a node with an unassigned AML opcode\n");
           FlPrintFile (ASL_FILE_STDERR,
               "Found a node with an unassigned AML opcode\n");
           return;
   
       case AML_INT_RESERVEDFIELD_OP:
   
           /* Special opcodes for within a field definition */
   
           Aml.Opcode = AML_FIELD_OFFSET_OP;
           break;
   
       case AML_INT_ACCESSFIELD_OP:
   
           Aml.Opcode = AML_FIELD_ACCESS_OP;
           break;
   
       case AML_INT_CONNECTION_OP:
   
           Aml.Opcode = AML_FIELD_CONNECTION_OP;
           break;
   
       default:
   
           Aml.Opcode = Op->Asl.AmlOpcode;
           break;
       }
   
   
       switch (Aml.Opcode)
       {
       case AML_PACKAGE_LENGTH:
   
           /* Value is the length to be encoded (Used in field definitions) */
   
           PkgLen.Len = (UINT32) Op->Asl.Value.Integer;
           break;
   
       default:
   
           /* Check for two-byte opcode */
   
           if (Aml.Opcode > 0x00FF)
           {
               /* Write the high byte first */
   
               CgLocalWriteAmlData (Op, &Aml.OpcodeBytes[1], 1);
           }
   
           CgLocalWriteAmlData (Op, &Aml.OpcodeBytes[0], 1);
   
           /* Subtreelength doesn't include length of package length bytes */
   
           PkgLen.Len = Op->Asl.AmlSubtreeLength + Op->Asl.AmlPkgLenBytes;
           break;
       }
   
       /* Does this opcode have an associated "PackageLength" field? */
   
       if (Op->Asl.CompileFlags & OP_AML_PACKAGE)
       {
           if (Op->Asl.AmlPkgLenBytes == 1)
           {
               /* Simplest case -- no bytes to follow, just write the count */
   
               CgLocalWriteAmlData (Op, &PkgLen.LenBytes[0], 1);
           }
           else if (Op->Asl.AmlPkgLenBytes != 0)
           {
               /*
                * Encode the "bytes to follow" in the first byte, top two bits.
                * The low-order nybble of the length is in the bottom 4 bits
                */
               PkgLenFirstByte = (UINT8)
                   (((UINT32) (Op->Asl.AmlPkgLenBytes - 1) << 6) |
                   (PkgLen.LenBytes[0] & 0x0F));
   
               CgLocalWriteAmlData (Op, &PkgLenFirstByte, 1);
   
               /*
                * Shift the length over by the 4 bits we just stuffed
                * in the first byte
                */
               PkgLen.Len >>= 4;
   
               /*
                * Now we can write the remaining bytes -
                * either 1, 2, or 3 bytes
                */
               for (i = 0; i < (UINT32) (Op->Asl.AmlPkgLenBytes - 1); i++)
               {
                   CgLocalWriteAmlData (Op, &PkgLen.LenBytes[i], 1);
               }
           }
       }
   
       switch (Aml.Opcode)
       {
       case AML_BYTE_OP:
   
           CgLocalWriteAmlData (Op, &Op->Asl.Value.Integer, 1);
           break;
   
       case AML_WORD_OP:
   
           CgLocalWriteAmlData (Op, &Op->Asl.Value.Integer, 2);
          break;
   
       case AML_DWORD_OP:
   
           CgLocalWriteAmlData (Op, &Op->Asl.Value.Integer, 4);
           break;
   
       case AML_QWORD_OP:
   
           CgLocalWriteAmlData (Op, &Op->Asl.Value.Integer, 8);
           break;
   
       case AML_STRING_OP:
   
           CgLocalWriteAmlData (Op, Op->Asl.Value.String, Op->Asl.AmlLength);
           break;
   
       default:
   
           /* All data opcodes must appear above */
   
           break;
       }
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    CgWriteTableHeader
    *
    * PARAMETERS:  Op        - The DEFINITIONBLOCK node
    *
    * RETURN:      None
    *
    * DESCRIPTION: Write a table header corresponding to the DEFINITIONBLOCK
    *
    * NOTE: Input strings should be validated before this function is invoked.
    *
    ******************************************************************************/
   
   static void
   CgWriteTableHeader (
       ACPI_PARSE_OBJECT       *Op)
   {
       ACPI_PARSE_OBJECT       *Child;
       UINT32                  CommentLength;
       ACPI_COMMENT_NODE       *Current;
   
   
       memset (&AslGbl_TableHeader, 0, sizeof (ACPI_TABLE_HEADER));
   
       /* AML filename */
   
       Child = Op->Asl.Child;
   
       /* Signature */
   
       Child = Child->Asl.Next;
   
       /*
        * For ASL-/ASL+ converter: replace the table signature with
        * "XXXX" and save the original table signature. This results in an AML
        * file with the signature "XXXX". The converter should remove this AML
        * file. In the event where this AML file does not get deleted, the
        * "XXXX" table signature prevents this AML file from running on the AML
        * interpreter.
        */
       if (AcpiGbl_CaptureComments)
       {
           ACPI_COPY_NAMESEG (AcpiGbl_TableSig, Child->Asl.Value.String);
           Child->Asl.Value.String = ACPI_SIG_XXXX;
       }
   
       ACPI_COPY_NAMESEG (AslGbl_TableHeader.Signature, Child->Asl.Value.String);
   
       /* Revision */
   
       Child = Child->Asl.Next;
       AslGbl_TableHeader.Revision = (UINT8) Child->Asl.Value.Integer;
   
       /* Command-line Revision override */
   
       if (AslGbl_RevisionOverride)
       {
           AslGbl_TableHeader.Revision = AslGbl_RevisionOverride;
       }
   
       /* OEMID */
   
       Child = Child->Asl.Next;
       memcpy (AslGbl_TableHeader.OemId, Child->Asl.Value.String,
           strlen (Child->Asl.Value.String));
   
       /* OEM TableID */
   
       Child = Child->Asl.Next;
       memcpy (AslGbl_TableHeader.OemTableId, Child->Asl.Value.String,
           strlen (Child->Asl.Value.String));
   
       /* OEM Revision */
   
       Child = Child->Asl.Next;
       AslGbl_TableHeader.OemRevision = (UINT32) Child->Asl.Value.Integer;
   
       /* Compiler ID */
   
       ACPI_COPY_NAMESEG (AslGbl_TableHeader.AslCompilerId, ASL_CREATOR_ID);
   
       /* Compiler version */
   
       AslGbl_TableHeader.AslCompilerRevision = ACPI_CA_VERSION;
   
       /* Table length. Checksum zero for now, will rewrite later */
   
       AslGbl_TableHeader.Length = sizeof (ACPI_TABLE_HEADER) +
           Op->Asl.AmlSubtreeLength;
   
       /* Calculate the comment lengths for this definition block parseOp */
   
       if (AcpiGbl_CaptureComments)
       {
           CvDbgPrint ("Calculating comment lengths for %s in write header\n",
               Op->Asl.ParseOpName);
   
           /*
            * Take the filename without extensions, add 3 for the new extension
            * and another 3 for the a908 bytecode and null terminator.
            */
           AslGbl_TableHeader.Length += strrchr (AslGbl_ParseTreeRoot->Asl.Filename, '.')
               - AslGbl_ParseTreeRoot->Asl.Filename + 1 + 3 + 3;
   
           Op->Asl.AmlSubtreeLength +=
               strlen (AslGbl_ParseTreeRoot->Asl.Filename) + 3;
   
           CvDbgPrint ("     Length: %u\n",
               (UINT32) strlen (AslGbl_ParseTreeRoot->Asl.Filename) + 3);
   
           if (Op->Asl.CommentList)
           {
               Current = Op->Asl.CommentList;
               while (Current)
               {
                   CommentLength = strlen (Current->Comment)+3;
                   CvDbgPrint ("Length of standard comment): %d\n", CommentLength);
                   CvDbgPrint ("    Comment string: %s\n\n", Current->Comment);
                   AslGbl_TableHeader.Length += CommentLength;
                   Op->Asl.AmlSubtreeLength += CommentLength;
                   Current = Current->Next;
                   CvDbgPrint ("    Length: %u\n", CommentLength);
               }
           }
           if (Op->Asl.CloseBraceComment)
           {
               CommentLength = strlen (Op->Asl.CloseBraceComment)+3;
               CvDbgPrint ("Length of inline comment +3: %d\n", CommentLength);
               CvDbgPrint ("    Comment string: %s\n\n", Op->Asl.CloseBraceComment);
               AslGbl_TableHeader.Length += CommentLength;
               Op->Asl.AmlSubtreeLength += CommentLength;
               CvDbgPrint ("    Length: %u\n", CommentLength);
           }
       }
   
       AslGbl_TableHeader.Checksum = 0;
       Op->Asl.FinalAmlOffset = ftell (AslGbl_Files[ASL_FILE_AML_OUTPUT].Handle);
   
       /* Write entire header and clear the table header global */
   
       CgLocalWriteAmlData (Op, &AslGbl_TableHeader, sizeof (ACPI_TABLE_HEADER));
       memset (&AslGbl_TableHeader, 0, sizeof (ACPI_TABLE_HEADER));
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    CgUpdateCdatHeader
    *
    * PARAMETERS:  Op                  - Op for the Definition Block
    *
    * RETURN:      None.
    *
    * DESCRIPTION: Complete the ACPI table by calculating the checksum and
    *              re-writing the header for the input definition block
    *
    ******************************************************************************/
   
   static void
   CgUpdateCdatHeader (
       ACPI_PARSE_OBJECT       *Op)
   {
       signed char             Sum;
       UINT32                  i;
       UINT32                  Length;
       UINT8                   FileByte;
       UINT8                   Checksum;
   
   
       /* Calculate the checksum over the entire definition block */
   
       Sum = 0;
       Length = sizeof (ACPI_TABLE_CDAT) + Op->Asl.AmlSubtreeLength;
       FlSeekFile (ASL_FILE_AML_OUTPUT, Op->Asl.FinalAmlOffset);
   
       for (i = 0; i < Length; i++)
       {
           if (FlReadFile (ASL_FILE_AML_OUTPUT, &FileByte, 1) != AE_OK)
           {
               AslError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, NULL,
                   "Table length is greater than size of the input file");
               return;
           }
   
           Sum = (signed char) (Sum + FileByte);
       }
   
       Checksum = (UINT8) (0 - Sum);
   
       DbgPrint (ASL_DEBUG_OUTPUT, "Computed checksum = %X\n", Checksum);
   
       /* Re-write the checksum byte */
   
       FlSeekFile (ASL_FILE_AML_OUTPUT, Op->Asl.FinalAmlOffset +
           ACPI_CDAT_OFFSET (Checksum));
   
       FlWriteFile (ASL_FILE_AML_OUTPUT, &Checksum, 1);
   
       /*
        * Seek to the end of the file. This is done to support multiple file
        * compilation. Doing this simplifies other parts of the codebase because
        * it eliminates the need to seek for a different starting place.
        */
       FlSeekFile (ASL_FILE_AML_OUTPUT, Op->Asl.FinalAmlOffset + Length);
   }
   
   /*******************************************************************************
    *
    * FUNCTION:    CgUpdateHeader
    *
    * PARAMETERS:  Op                  - Op for the Definition Block
    *
    * RETURN:      None.
    *
    * DESCRIPTION: Complete the ACPI table by calculating the checksum and
    *              re-writing the header for the input definition block
    *
    ******************************************************************************/
   
   static void
   CgUpdateHeader (
       ACPI_PARSE_OBJECT       *Op)
   {
       signed char             Sum;
       UINT32                  i;
       UINT32                  Length;
       UINT8                   FileByte;
       UINT8                   Checksum;
   
   
       /* Calculate the checksum over the entire definition block */
   
       Sum = 0;
       Length = sizeof (ACPI_TABLE_HEADER) + Op->Asl.AmlSubtreeLength;
       FlSeekFile (ASL_FILE_AML_OUTPUT, Op->Asl.FinalAmlOffset);
   
       for (i = 0; i < Length; i++)
       {
           if (FlReadFile (ASL_FILE_AML_OUTPUT, &FileByte, 1) != AE_OK)
           {
               AslError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, NULL,
                   "Table length is greater than size of the input file");
               return;
           }
   
           Sum = (signed char) (Sum + FileByte);
       }
   
       Checksum = (UINT8) (0 - Sum);
   
       /* Re-write the checksum byte */
   
       FlSeekFile (ASL_FILE_AML_OUTPUT, Op->Asl.FinalAmlOffset +
           ACPI_OFFSET (ACPI_TABLE_HEADER, Checksum));
   
       FlWriteFile (ASL_FILE_AML_OUTPUT, &Checksum, 1);
   
       /*
        * Seek to the end of the file. This is done to support multiple file
        * compilation. Doing this simplifies other parts of the codebase because
        * it eliminates the need to seek for a different starting place.
        */
       FlSeekFile (ASL_FILE_AML_OUTPUT, Op->Asl.FinalAmlOffset + Length);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    CgWriteNode
    *
    * PARAMETERS:  Op            - Parse node to write.
    *
    * RETURN:      None.
    *
    * DESCRIPTION: Write the AML that corresponds to a parse node.
    *
    ******************************************************************************/
   
   static void
   CgWriteNode (
       ACPI_PARSE_OBJECT       *Op)
   {
       ASL_RESOURCE_NODE       *Rnode;
   
   
       /* Write all comments here. */
   
       if (AcpiGbl_CaptureComments)
       {
           CgWriteAmlComment(Op);
       }
   
       /* Always check for DEFAULT_ARG and other "Noop" nodes */
       /* TBD: this may not be the best place for this check */
   
       if ((Op->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG)  ||
           (Op->Asl.ParseOpcode == PARSEOP_INCLUDE)      ||
           (Op->Asl.ParseOpcode == PARSEOP_INCLUDE_END))
       {
           return;
       }
   
       Op->Asl.FinalAmlLength = 0;
   
       switch (Op->Asl.AmlOpcode)
       {
       case AML_RAW_DATA_BYTE:
       case AML_RAW_DATA_WORD:
       case AML_RAW_DATA_DWORD:
       case AML_RAW_DATA_QWORD:
   
           CgLocalWriteAmlData (Op, &Op->Asl.Value.Integer, Op->Asl.AmlLength);
           return;
   
   
       case AML_RAW_DATA_BUFFER:
   
           CgLocalWriteAmlData (Op, Op->Asl.Value.Buffer, Op->Asl.AmlLength);
           return;
   
   
       case AML_RAW_DATA_CHAIN:
   
           Rnode = ACPI_CAST_PTR (ASL_RESOURCE_NODE, Op->Asl.Value.Buffer);
           while (Rnode)
           {
               CgLocalWriteAmlData (Op, Rnode->Buffer, Rnode->BufferLength);
               Rnode = Rnode->Next;
           }
           return;
   
       default:
   
           /* Internal data opcodes must all appear above */
   
           break;
       }
   
       switch (Op->Asl.ParseOpcode)
       {
       case PARSEOP_DEFAULT_ARG:
   
           break;
   
       case PARSEOP_DEFINITION_BLOCK:
   
           CgWriteTableHeader (Op);
           if (AcpiGbl_CaptureComments)
           {
               CgWriteAmlDefBlockComment (Op);
           }
           break;
   
       case PARSEOP_NAMESEG:
       case PARSEOP_NAMESTRING:
       case PARSEOP_METHODCALL:
   
           CgLocalWriteAmlData (Op, Op->Asl.Value.String, Op->Asl.AmlLength);
           break;
   
       default:
   
           CgWriteAmlOpcode (Op);
           break;
       }
   }

Cache object: 3ab4f4cda9a8a78fdbc5891ae2c5cd59