usr/src/boot/sys/contrib/dev/acpica/compiler/dtutils.c - illumos-gate - Gitiles

 /******************************************************************************
  *
  * Module Name: dtutils.c - Utility routines for the data table compiler
  *
  *****************************************************************************/

 /*
  * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * 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.
  *
  * Alternatively, this software may be distributed under the terms of the
  * GNU General Public License ("GPL") version 2 as published by the Free
  * Software Foundation.
  *
  * NO WARRANTY
  * 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 MERCHANTIBILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
  */

 #include <contrib/dev/acpica/compiler/aslcompiler.h>
 #include <contrib/dev/acpica/compiler/dtcompiler.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)
 {

     /* Check if user wants to ignore this exception */

     if (AslIsExceptionDisabled (Level, MessageId))
     {
         return;
     }

     if (FieldObject)
     {
         AslCommonError (Level, MessageId,
             FieldObject->Line,
             FieldObject->Line,
             FieldObject->ByteOffset,
             FieldObject->Column,
             Gbl_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 (Gbl_WarningLevel < Level)
         {
             return;
         }
         break;

     default:

         break;
     }

     if (FieldObject)
     {
         AslCommonError (Level, MessageId,
             FieldObject->Line,
             FieldObject->Line,
             FieldObject->ByteOffset,
             FieldObject->NameColumn,
             Gbl_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:    DtStrtoul64
  *
  * PARAMETERS:  String              - Null terminated string
  *              ReturnInteger       - Where the converted integer is returned
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Simple conversion of a string hex integer constant to unsigned
  *              value. Assumes no leading "0x" for the constant.
  *
  * Portability note: The reason this function exists is because a 64-bit
  * sscanf is not available in all environments.
  *
  *****************************************************************************/

 ACPI_STATUS
 DtStrtoul64 (
     char                    *String,
     UINT64                  *ReturnInteger)
 {
     char                    *ThisChar = String;
     UINT32                  ThisDigit;
     UINT64                  ReturnValue = 0;
     int                     DigitCount = 0;


     /* Skip over any white space in the buffer */

     while ((*ThisChar == ' ') || (*ThisChar == '\t'))
     {
         ThisChar++;
     }

     /* Skip leading zeros */

     while ((*ThisChar) == '0')
     {
         ThisChar++;
     }

     /* Convert character-by-character */

     while (*ThisChar)
     {
         if (isdigit ((int) *ThisChar))
         {
             /* Convert ASCII 0-9 to Decimal value */

             ThisDigit = ((UINT8) *ThisChar) - '0';
         }
         else /* Letter */
         {
             ThisDigit = (UINT32) toupper ((int) *ThisChar);
             if (!isxdigit ((int) ThisDigit))
             {
                 /* Not A-F */

                 return (AE_BAD_CHARACTER);
             }

             /* Convert ASCII Hex char (A-F) to value */

             ThisDigit = (ThisDigit - 'A') + 10;
         }

         /* Insert the 4-bit hex digit */

         ReturnValue <<= 4;
         ReturnValue += ThisDigit;

         ThisChar++;
         DigitCount++;
         if (DigitCount > 16)
         {
             /* Value is too large (> 64 bits/8 bytes/16 hex digits) */

             return (AE_LIMIT);
         }
     }

     *ReturnInteger = ReturnValue;
     return (AE_OK);
 }


 /******************************************************************************
  *
  * 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_FLAGS4:

         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:

         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_BUF16:
     case ACPI_DMT_BUF128:
     case ACPI_DMT_PCI_PATH:

         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:

         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_FLAGS4:
     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_IVRS:
     case ACPI_DMT_GTDT:
     case ACPI_DMT_MADT:
     case ACPI_DMT_PCCT:
     case ACPI_DMT_PMTT:
     case ACPI_DMT_SRAT:
     case ACPI_DMT_ASF:
     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:

         ByteLength = 1;
         break;

     case ACPI_DMT_UINT16:
     case ACPI_DMT_DMAR:
     case ACPI_DMT_HEST:
     case ACPI_DMT_NFIT:
     case ACPI_DMT_PCI_PATH:

         ByteLength = 2;
         break;

     case ACPI_DMT_UINT24:

         ByteLength = 3;
         break;

     case ACPI_DMT_UINT32:
     case ACPI_DMT_NAME4:
     case ACPI_DMT_SIG:
     case ACPI_DMT_LPIT:

         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 (MsgBuffer, "Expected \"%s\"", Info->Name);
             DtFatal (ASL_MSG_COMPILER_INTERNAL, NULL, 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:

         Value = DtGetFieldValue (Field);
         if (Value)
         {
             ByteLength = DtGetBufferLength (Value);
         }
         else
         {   /* At this point, this is a fatal error */

             sprintf (MsgBuffer, "Expected \"%s\"", Info->Name);
             DtFatal (ASL_MSG_COMPILER_INTERNAL, NULL, MsgBuffer);
             return (0);
         }
         break;

     case ACPI_DMT_BUF10:

         ByteLength = 10;
         break;

     case ACPI_DMT_BUF16:
     case ACPI_DMT_UUID:

         ByteLength = 16;
         break;

     case ACPI_DMT_BUF128:

         ByteLength = 128;
         break;

     case ACPI_DMT_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 = AcpiTbChecksum (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 (Gbl_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 = Gbl_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 == Gbl_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 == Gbl_RootTable)
             {
                 break;
             }

             ParentTable = DtGetParentSubtable (ParentTable);

             if (ChildTable->Peer == StartTable)
             {
                 break;
             }
         }
     }
 }


 /*******************************************************************************
  *
  * FUNCTION:    UtSubtableCacheCalloc
  *
  * PARAMETERS:  None
  *
  * RETURN:      Pointer to the buffer. Aborts on allocation failure
  *
  * DESCRIPTION: Allocate a subtable object buffer. Bypass the local
  *              dynamic memory manager for performance reasons (This has a
  *              major impact on the speed of the compiler.)
  *
  ******************************************************************************/

 DT_SUBTABLE *
 UtSubtableCacheCalloc (
     void)
 {
     ASL_CACHE_INFO          *Cache;


     if (Gbl_SubtableCacheNext >= Gbl_SubtableCacheLast)
     {
         /* Allocate a new buffer */

         Cache = UtLocalCalloc (sizeof (Cache->Next) +
             (sizeof (DT_SUBTABLE) * ASL_SUBTABLE_CACHE_SIZE));

         /* Link new cache buffer to head of list */

         Cache->Next = Gbl_SubtableCacheList;
         Gbl_SubtableCacheList = Cache;

         /* Setup cache management pointers */

         Gbl_SubtableCacheNext = ACPI_CAST_PTR (DT_SUBTABLE, Cache->Buffer);
         Gbl_SubtableCacheLast = Gbl_SubtableCacheNext + ASL_SUBTABLE_CACHE_SIZE;
     }

     Gbl_SubtableCount++;
     return (Gbl_SubtableCacheNext++);
 }


 /*******************************************************************************
  *
  * FUNCTION:    UtFieldCacheCalloc
  *
  * PARAMETERS:  None
  *
  * RETURN:      Pointer to the buffer. Aborts on allocation failure
  *
  * DESCRIPTION: Allocate a field object buffer. Bypass the local
  *              dynamic memory manager for performance reasons (This has a
  *              major impact on the speed of the compiler.)
  *
  ******************************************************************************/

 DT_FIELD *
 UtFieldCacheCalloc (
     void)
 {
     ASL_CACHE_INFO          *Cache;


     if (Gbl_FieldCacheNext >= Gbl_FieldCacheLast)
     {
         /* Allocate a new buffer */

         Cache = UtLocalCalloc (sizeof (Cache->Next) +
             (sizeof (DT_FIELD) * ASL_FIELD_CACHE_SIZE));

         /* Link new cache buffer to head of list */

         Cache->Next = Gbl_FieldCacheList;
         Gbl_FieldCacheList = Cache;

         /* Setup cache management pointers */

         Gbl_FieldCacheNext = ACPI_CAST_PTR (DT_FIELD, Cache->Buffer);
         Gbl_FieldCacheLast = Gbl_FieldCacheNext + ASL_FIELD_CACHE_SIZE;
     }

     Gbl_FieldCount++;
     return (Gbl_FieldCacheNext++);
 }


 /*******************************************************************************
  *
  * FUNCTION:    DtDeleteCaches
  *
  * PARAMETERS:  None
  *
  * RETURN:      None
  *
  * DESCRIPTION: Delete all local cache buffer blocks
  *
  ******************************************************************************/

 void
 DtDeleteCaches (
     void)
 {
     UINT32                  BufferCount;
     ASL_CACHE_INFO          *Next;


     /* Field cache */

     BufferCount = 0;
     while (Gbl_FieldCacheList)
     {
         Next = Gbl_FieldCacheList->Next;
         ACPI_FREE (Gbl_FieldCacheList);
         Gbl_FieldCacheList = Next;
         BufferCount++;
     }

     DbgPrint (ASL_DEBUG_OUTPUT,
         "%u Fields, Buffer size: %u fields (%u bytes), %u Buffers\n",
         Gbl_FieldCount, ASL_FIELD_CACHE_SIZE,
         (sizeof (DT_FIELD) * ASL_FIELD_CACHE_SIZE), BufferCount);

     Gbl_FieldCount = 0;
     Gbl_FieldCacheNext = NULL;
     Gbl_FieldCacheLast = NULL;

     /* Subtable cache */

     BufferCount = 0;
     while (Gbl_SubtableCacheList)
     {
         Next = Gbl_SubtableCacheList->Next;
         ACPI_FREE (Gbl_SubtableCacheList);
         Gbl_SubtableCacheList = Next;
         BufferCount++;
     }

     DbgPrint (ASL_DEBUG_OUTPUT,
         "%u Subtables, Buffer size: %u subtables (%u bytes), %u Buffers\n",
         Gbl_SubtableCount, ASL_SUBTABLE_CACHE_SIZE,
         (sizeof (DT_SUBTABLE) * ASL_SUBTABLE_CACHE_SIZE), BufferCount);

     Gbl_SubtableCount = 0;
     Gbl_SubtableCacheNext = NULL;
     Gbl_SubtableCacheLast = NULL;
 }
	/******************************************************************************
	*
	* Module Name: dtutils.c - Utility routines for the data table compiler
	*
	*****************************************************************************/

	/*
	* Copyright (C) 2000 - 2015, Intel Corp.
	* All rights reserved.
	*
	* 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.
	*
	* Alternatively, this software may be distributed under the terms of the
	* GNU General Public License ("GPL") version 2 as published by the Free
	* Software Foundation.
	*
	* NO WARRANTY
	* 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 MERCHANTIBILITY AND FITNESS FOR
	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	* HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
	*/

	#include <contrib/dev/acpica/compiler/aslcompiler.h>
	#include <contrib/dev/acpica/compiler/dtcompiler.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)
	{

	/* Check if user wants to ignore this exception */

	if (AslIsExceptionDisabled (Level, MessageId))
	{
	return;
	}

	if (FieldObject)
	{
	AslCommonError (Level, MessageId,
	FieldObject->Line,
	FieldObject->Line,
	FieldObject->ByteOffset,
	FieldObject->Column,
	Gbl_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 (Gbl_WarningLevel < Level)
	{
	return;
	}
	break;

	default:

	break;
	}

	if (FieldObject)
	{
	AslCommonError (Level, MessageId,
	FieldObject->Line,
	FieldObject->Line,
	FieldObject->ByteOffset,
	FieldObject->NameColumn,
	Gbl_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: DtStrtoul64
	*
	* PARAMETERS: String - Null terminated string
	* ReturnInteger - Where the converted integer is returned
	*
	* RETURN: Status
	*
	* DESCRIPTION: Simple conversion of a string hex integer constant to unsigned
	* value. Assumes no leading "0x" for the constant.
	*
	* Portability note: The reason this function exists is because a 64-bit
	* sscanf is not available in all environments.
	*
	*****************************************************************************/

	ACPI_STATUS
	DtStrtoul64 (
	char *String,
	UINT64 *ReturnInteger)
	{
	char *ThisChar = String;
	UINT32 ThisDigit;
	UINT64 ReturnValue = 0;
	int DigitCount = 0;


	/* Skip over any white space in the buffer */

	while ((ThisChar == ' ') \|\| (ThisChar == '\t'))
	{
	ThisChar++;
	}

	/* Skip leading zeros */

	while ((*ThisChar) == '0')
	{
	ThisChar++;
	}

	/* Convert character-by-character */

	while (*ThisChar)
	{
	if (isdigit ((int) *ThisChar))
	{
	/* Convert ASCII 0-9 to Decimal value */

	ThisDigit = ((UINT8) *ThisChar) - '0';
	}
	else /* Letter */
	{
	ThisDigit = (UINT32) toupper ((int) *ThisChar);
	if (!isxdigit ((int) ThisDigit))
	{
	/* Not A-F */

	return (AE_BAD_CHARACTER);
	}

	/* Convert ASCII Hex char (A-F) to value */

	ThisDigit = (ThisDigit - 'A') + 10;
	}

	/* Insert the 4-bit hex digit */

	ReturnValue <<= 4;
	ReturnValue += ThisDigit;

	ThisChar++;
	DigitCount++;
	if (DigitCount > 16)
	{
	/* Value is too large (> 64 bits/8 bytes/16 hex digits) */

	return (AE_LIMIT);
	}
	}

	*ReturnInteger = ReturnValue;
	return (AE_OK);
	}


	/******************************************************************************
	*
	* 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_FLAGS4:

	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:

	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_BUF16:
	case ACPI_DMT_BUF128:
	case ACPI_DMT_PCI_PATH:

	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:

	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_FLAGS4:
	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_IVRS:
	case ACPI_DMT_GTDT:
	case ACPI_DMT_MADT:
	case ACPI_DMT_PCCT:
	case ACPI_DMT_PMTT:
	case ACPI_DMT_SRAT:
	case ACPI_DMT_ASF:
	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:

	ByteLength = 1;
	break;

	case ACPI_DMT_UINT16:
	case ACPI_DMT_DMAR:
	case ACPI_DMT_HEST:
	case ACPI_DMT_NFIT:
	case ACPI_DMT_PCI_PATH:

	ByteLength = 2;
	break;

	case ACPI_DMT_UINT24:

	ByteLength = 3;
	break;

	case ACPI_DMT_UINT32:
	case ACPI_DMT_NAME4:
	case ACPI_DMT_SIG:
	case ACPI_DMT_LPIT:

	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 (MsgBuffer, "Expected \"%s\"", Info->Name);
	DtFatal (ASL_MSG_COMPILER_INTERNAL, NULL, 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:

	Value = DtGetFieldValue (Field);
	if (Value)
	{
	ByteLength = DtGetBufferLength (Value);
	}
	else
	{ /* At this point, this is a fatal error */

	sprintf (MsgBuffer, "Expected \"%s\"", Info->Name);
	DtFatal (ASL_MSG_COMPILER_INTERNAL, NULL, MsgBuffer);
	return (0);
	}
	break;

	case ACPI_DMT_BUF10:

	ByteLength = 10;
	break;

	case ACPI_DMT_BUF16:
	case ACPI_DMT_UUID:

	ByteLength = 16;
	break;

	case ACPI_DMT_BUF128:

	ByteLength = 128;
	break;

	case ACPI_DMT_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 = AcpiTbChecksum (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 (Gbl_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 = Gbl_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 == Gbl_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 == Gbl_RootTable)
	{
	break;
	}

	ParentTable = DtGetParentSubtable (ParentTable);

	if (ChildTable->Peer == StartTable)
	{
	break;
	}
	}
	}
	}


	/*******************************************************************************
	*
	* FUNCTION: UtSubtableCacheCalloc
	*
	* PARAMETERS: None
	*
	* RETURN: Pointer to the buffer. Aborts on allocation failure
	*
	* DESCRIPTION: Allocate a subtable object buffer. Bypass the local
	* dynamic memory manager for performance reasons (This has a
	* major impact on the speed of the compiler.)
	*
	******************************************************************************/

	DT_SUBTABLE *
	UtSubtableCacheCalloc (
	void)
	{
	ASL_CACHE_INFO *Cache;


	if (Gbl_SubtableCacheNext >= Gbl_SubtableCacheLast)
	{
	/* Allocate a new buffer */

	Cache = UtLocalCalloc (sizeof (Cache->Next) +
	(sizeof (DT_SUBTABLE) * ASL_SUBTABLE_CACHE_SIZE));

	/* Link new cache buffer to head of list */

	Cache->Next = Gbl_SubtableCacheList;
	Gbl_SubtableCacheList = Cache;

	/* Setup cache management pointers */

	Gbl_SubtableCacheNext = ACPI_CAST_PTR (DT_SUBTABLE, Cache->Buffer);
	Gbl_SubtableCacheLast = Gbl_SubtableCacheNext + ASL_SUBTABLE_CACHE_SIZE;
	}

	Gbl_SubtableCount++;
	return (Gbl_SubtableCacheNext++);
	}


	/*******************************************************************************
	*
	* FUNCTION: UtFieldCacheCalloc
	*
	* PARAMETERS: None
	*
	* RETURN: Pointer to the buffer. Aborts on allocation failure
	*
	* DESCRIPTION: Allocate a field object buffer. Bypass the local
	* dynamic memory manager for performance reasons (This has a
	* major impact on the speed of the compiler.)
	*
	******************************************************************************/

	DT_FIELD *
	UtFieldCacheCalloc (
	void)
	{
	ASL_CACHE_INFO *Cache;


	if (Gbl_FieldCacheNext >= Gbl_FieldCacheLast)
	{
	/* Allocate a new buffer */

	Cache = UtLocalCalloc (sizeof (Cache->Next) +
	(sizeof (DT_FIELD) * ASL_FIELD_CACHE_SIZE));

	/* Link new cache buffer to head of list */

	Cache->Next = Gbl_FieldCacheList;
	Gbl_FieldCacheList = Cache;

	/* Setup cache management pointers */

	Gbl_FieldCacheNext = ACPI_CAST_PTR (DT_FIELD, Cache->Buffer);
	Gbl_FieldCacheLast = Gbl_FieldCacheNext + ASL_FIELD_CACHE_SIZE;
	}

	Gbl_FieldCount++;
	return (Gbl_FieldCacheNext++);
	}


	/*******************************************************************************
	*
	* FUNCTION: DtDeleteCaches
	*
	* PARAMETERS: None
	*
	* RETURN: None
	*
	* DESCRIPTION: Delete all local cache buffer blocks
	*
	******************************************************************************/

	void
	DtDeleteCaches (
	void)
	{
	UINT32 BufferCount;
	ASL_CACHE_INFO *Next;


	/* Field cache */

	BufferCount = 0;
	while (Gbl_FieldCacheList)
	{
	Next = Gbl_FieldCacheList->Next;
	ACPI_FREE (Gbl_FieldCacheList);
	Gbl_FieldCacheList = Next;
	BufferCount++;
	}

	DbgPrint (ASL_DEBUG_OUTPUT,
	"%u Fields, Buffer size: %u fields (%u bytes), %u Buffers\n",
	Gbl_FieldCount, ASL_FIELD_CACHE_SIZE,
	(sizeof (DT_FIELD) * ASL_FIELD_CACHE_SIZE), BufferCount);

	Gbl_FieldCount = 0;
	Gbl_FieldCacheNext = NULL;
	Gbl_FieldCacheLast = NULL;

	/* Subtable cache */

	BufferCount = 0;
	while (Gbl_SubtableCacheList)
	{
	Next = Gbl_SubtableCacheList->Next;
	ACPI_FREE (Gbl_SubtableCacheList);
	Gbl_SubtableCacheList = Next;
	BufferCount++;
	}

	DbgPrint (ASL_DEBUG_OUTPUT,
	"%u Subtables, Buffer size: %u subtables (%u bytes), %u Buffers\n",
	Gbl_SubtableCount, ASL_SUBTABLE_CACHE_SIZE,
	(sizeof (DT_SUBTABLE) * ASL_SUBTABLE_CACHE_SIZE), BufferCount);

	Gbl_SubtableCount = 0;
	Gbl_SubtableCacheNext = NULL;
	Gbl_SubtableCacheLast = NULL;
	}