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

     /******************************************************************************
      *
      * Module Name: aslmapoutput - Output/emit the resource descriptor/device maps
      *
      *****************************************************************************/
     
     /******************************************************************************
      *
      * 1. Copyright Notice
     *
     * Some or all of this work - Copyright (c) 1999 - 2022, Intel Corp.
     * All rights reserved.
     *
     * 2. License
     *
     * 2.1. This is your license from Intel Corp. under its intellectual property
     * rights. You may have additional license terms from the party that provided
     * you this software, covering your right to use that party's intellectual
     * property rights.
     *
     * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
     * copy of the source code appearing in this file ("Covered Code") an
     * irrevocable, perpetual, worldwide license under Intel's copyrights in the
     * base code distributed originally by Intel ("Original Intel Code") to copy,
     * make derivatives, distribute, use and display any portion of the Covered
     * Code in any form, with the right to sublicense such rights; and
     *
     * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
     * license (with the right to sublicense), under only those claims of Intel
     * patents that are infringed by the Original Intel Code, to make, use, sell,
     * offer to sell, and import the Covered Code and derivative works thereof
     * solely to the minimum extent necessary to exercise the above copyright
     * license, and in no event shall the patent license extend to any additions
     * to or modifications of the Original Intel Code. No other license or right
     * is granted directly or by implication, estoppel or otherwise;
     *
     * The above copyright and patent license is granted only if the following
     * conditions are met:
     *
     * 3. Conditions
     *
     * 3.1. Redistribution of Source with Rights to Further Distribute Source.
     * Redistribution of source code of any substantial portion of the Covered
     * Code or modification with rights to further distribute source must include
     * the above Copyright Notice, the above License, this list of Conditions,
     * and the following Disclaimer and Export Compliance provision. In addition,
     * Licensee must cause all Covered Code to which Licensee contributes to
     * contain a file documenting the changes Licensee made to create that Covered
     * Code and the date of any change. Licensee must include in that file the
     * documentation of any changes made by any predecessor Licensee. Licensee
     * must include a prominent statement that the modification is derived,
     * directly or indirectly, from Original Intel Code.
     *
     * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
     * Redistribution of source code of any substantial portion of the Covered
     * Code or modification without rights to further distribute source must
     * include the following Disclaimer and Export Compliance provision in the
     * documentation and/or other materials provided with distribution. In
     * addition, Licensee may not authorize further sublicense of source of any
     * portion of the Covered Code, and must include terms to the effect that the
     * license from Licensee to its licensee is limited to the intellectual
     * property embodied in the software Licensee provides to its licensee, and
     * not to intellectual property embodied in modifications its licensee may
     * make.
     *
     * 3.3. Redistribution of Executable. Redistribution in executable form of any
     * substantial portion of the Covered Code or modification must reproduce the
     * above Copyright Notice, and the following Disclaimer and Export Compliance
     * provision in the documentation and/or other materials provided with the
     * distribution.
     *
     * 3.4. Intel retains all right, title, and interest in and to the Original
     * Intel Code.
     *
     * 3.5. Neither the name Intel nor any other trademark owned or controlled by
     * Intel shall be used in advertising or otherwise to promote the sale, use or
     * other dealings in products derived from or relating to the Covered Code
     * without prior written authorization from Intel.
     *
     * 4. Disclaimer and Export Compliance
     *
     * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
     * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
     * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
     * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
     * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
     * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
     * PARTICULAR PURPOSE.
     *
     * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
     * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
     * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
     * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
     * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
     * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
     * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
     * LIMITED REMEDY.
     *
     * 4.3. Licensee shall not export, either directly or indirectly, any of this
    * software or system incorporating such software without first obtaining any
    * required license or other approval from the U. S. Department of Commerce or
    * any other agency or department of the United States Government. In the
    * event Licensee exports any such software from the United States or
    * re-exports any such software from a foreign destination, Licensee shall
    * ensure that the distribution and export/re-export of the software is in
    * compliance with all laws, regulations, orders, or other restrictions of the
    * U.S. Export Administration Regulations. Licensee agrees that neither it nor
    * any of its subsidiaries will export/re-export any technical data, process,
    * software, or service, directly or indirectly, to any country for which the
    * United States government or any agency thereof requires an export license,
    * other governmental approval, or letter of assurance, without first obtaining
    * such license, approval or letter.
    *
    *****************************************************************************
    *
    * Alternatively, you may choose to be licensed under the terms of the
    * following license:
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions
    * are met:
    * 1. Redistributions of source code must retain the above copyright
    *    notice, this list of conditions, and the following disclaimer,
    *    without modification.
    * 2. Redistributions in binary form must reproduce at minimum a disclaimer
    *    substantially similar to the "NO WARRANTY" disclaimer below
    *    ("Disclaimer") and any redistribution must be conditioned upon
    *    including a substantially similar Disclaimer requirement for further
    *    binary redistribution.
    * 3. Neither the names of the above-listed copyright holders nor the names
    *    of any contributors may be used to endorse or promote products derived
    *    from this software without specific prior written permission.
    *
    * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
    * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    *
    * Alternatively, you may choose to be licensed under the terms of the
    * GNU General Public License ("GPL") version 2 as published by the Free
    * Software Foundation.
    *
    *****************************************************************************/
   
   #include <contrib/dev/acpica/include/acpi.h>
   #include <contrib/dev/acpica/include/accommon.h>
   #include <contrib/dev/acpica/include/acapps.h>
   #include <contrib/dev/acpica/compiler/aslcompiler.h>
   #include "aslcompiler.y.h"
   #include <contrib/dev/acpica/include/acinterp.h>
   #include <contrib/dev/acpica/include/acparser.h>
   #include <contrib/dev/acpica/include/acnamesp.h>
   #include <contrib/dev/acpica/include/amlcode.h>
   
   /* This module used for application-level code only */
   
   #define _COMPONENT          ACPI_COMPILER
           ACPI_MODULE_NAME    ("aslmapoutput")
   
   /* Local prototypes */
   
   static void
   MpEmitGpioInfo (
       void);
   
   static void
   MpEmitSerialInfo (
       void);
   
   static void
   MpEmitDeviceTree (
       void);
   
   static ACPI_STATUS
   MpEmitOneDevice (
       ACPI_HANDLE             ObjHandle,
       UINT32                  NestingLevel,
       void                    *Context,
       void                    **ReturnValue);
   
   static void
   MpXrefDevices (
       ACPI_GPIO_INFO          *Info);
   
   static ACPI_STATUS
   MpNamespaceXrefBegin (
       ACPI_PARSE_OBJECT       *Op,
       UINT32                  Level,
       void                    *Context);
   
   
   /* Strings used to decode flag bits */
   
   const char                  *DirectionDecode[] =
   {
       "Both I/O   ",
       "InputOnly  ",
       "OutputOnly ",
       "Preserve   "
   };
   
   const char                  *PolarityDecode[] =
   {
       "ActiveHigh",
       "ActiveLow ",
       "ActiveBoth",
       "Reserved  "
   };
   
   
   /*******************************************************************************
    *
    * FUNCTION:    MpEmitMappingInfo
    *
    * PARAMETERS:  None
    *
    * RETURN:      None
    *
    * DESCRIPTION: External interface.
    *              Map file has already been opened. Emit all of the collected
    *              hardware mapping information. Includes: GPIO information,
    *              Serial information, and a dump of the entire ACPI device tree.
    *
    ******************************************************************************/
   
   void
   MpEmitMappingInfo (
       void)
   {
   
       /* Mapfile option enabled? */
   
       if (!AslGbl_MapfileFlag)
       {
           return;
       }
   
       if (!AslGbl_GpioList)
       {
           FlPrintFile (ASL_FILE_MAP_OUTPUT,
               "\nNo GPIO devices found\n");
       }
   
       if (!AslGbl_SerialList)
       {
           FlPrintFile (ASL_FILE_MAP_OUTPUT,
               "\nNo Serial devices found (I2C/SPI/UART)\n");
       }
   
       if (!AslGbl_GpioList && !AslGbl_SerialList)
       {
           return;
       }
   
       /* Headers */
   
       FlPrintFile (ASL_FILE_MAP_OUTPUT, "\nResource Descriptor Connectivity Map\n");
       FlPrintFile (ASL_FILE_MAP_OUTPUT,   "------------------------------------\n");
   
       /* Emit GPIO and Serial descriptors, then entire ACPI device tree */
   
       MpEmitGpioInfo ();
       MpEmitSerialInfo ();
       MpEmitDeviceTree ();
   
       /* Clear the lists - no need to free memory here */
   
       AslGbl_SerialList = NULL;
       AslGbl_GpioList = NULL;
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    MpEmitGpioInfo
    *
    * PARAMETERS:  None
    *
    * RETURN:      None
    *
    * DESCRIPTION: Emit the info about all GPIO devices found during the
    *              compile or disassembly.
    *
    ******************************************************************************/
   
   static void
   MpEmitGpioInfo (
       void)
   {
       ACPI_GPIO_INFO          *Info;
       char                    *Type;
       char                    *PrevDeviceName = NULL;
       const char              *Direction;
       const char              *Polarity;
       char                    *ParentPathname;
       const char              *Description;
       char                    *HidString;
       const AH_DEVICE_ID      *HidInfo;
   
   
       /* Walk the GPIO descriptor list */
   
       Info = AslGbl_GpioList;
       while (Info)
       {
           HidString = MpGetHidViaNamestring (Info->DeviceName);
   
           /* Print header info for the controller itself */
   
           if (!PrevDeviceName ||
               strcmp (PrevDeviceName, Info->DeviceName))
           {
               FlPrintFile (ASL_FILE_MAP_OUTPUT,
                   "\n\nGPIO Controller:  %-8s  %-28s",
                   HidString, Info->DeviceName);
   
               HidInfo = AcpiAhMatchHardwareId (HidString);
               if (HidInfo)
               {
                   FlPrintFile (ASL_FILE_MAP_OUTPUT, "  // %s",
                       HidInfo->Description);
               }
   
               FlPrintFile (ASL_FILE_MAP_OUTPUT,
                   "\n\nPin   Type     Direction    Polarity"
                   "    Dest _HID  Destination\n");
           }
   
           PrevDeviceName = Info->DeviceName;
   
           /* Setup various strings based upon the type (GpioInt or GpioIo) */
   
           switch (Info->Type)
           {
           case AML_RESOURCE_GPIO_TYPE_INT:
   
               Type = "GpioInt";
               Direction = "-Interrupt-";
               Polarity = PolarityDecode[Info->Polarity];
               break;
   
           case AML_RESOURCE_GPIO_TYPE_IO:
   
               Type = "GpioIo ";
               Direction = DirectionDecode[Info->Direction];
               Polarity = "          ";
               break;
   
           default:
               continue;
           }
   
           /* Emit the GPIO info */
   
           FlPrintFile (ASL_FILE_MAP_OUTPUT, "%4.4X  %s  %s  %s  ",
               Info->PinNumber, Type, Direction, Polarity);
   
           ParentPathname = NULL;
           HidString = MpGetConnectionInfo (Info->Op, Info->PinIndex,
               &Info->TargetNode, &ParentPathname);
           if (HidString)
           {
               /*
                * This is a Connection() field
                * Attempt to find all references to the field.
                */
               FlPrintFile (ASL_FILE_MAP_OUTPUT, "%8s   %-28s",
                   HidString, ParentPathname);
   
               MpXrefDevices (Info);
           }
           else
           {
               /*
                * For Devices, attempt to get the _HID description string.
                * Failing that (many _HIDs are not recognized), attempt to
                * get the _DDN description string.
                */
               HidString = MpGetParentDeviceHid (Info->Op, &Info->TargetNode,
                   &ParentPathname);
   
               FlPrintFile (ASL_FILE_MAP_OUTPUT, "%8s   %-28s",
                   HidString, ParentPathname);
   
               /* Get the _HID description or _DDN string */
   
               HidInfo = AcpiAhMatchHardwareId (HidString);
               if (HidInfo)
               {
                   FlPrintFile (ASL_FILE_MAP_OUTPUT, "  // %s",
                       HidInfo->Description);
               }
               else if ((Description = MpGetDdnValue (ParentPathname)))
               {
                   FlPrintFile (ASL_FILE_MAP_OUTPUT, "  // %s (_DDN)",
                       Description);
               }
           }
   
           FlPrintFile (ASL_FILE_MAP_OUTPUT, "\n");
           ACPI_FREE (ParentPathname);
           Info = Info->Next;
       }
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    MpEmitSerialInfo
    *
    * PARAMETERS:  None
    *
    * RETURN:      None
    *
    * DESCRIPTION: Emit the info about all Serial devices found during the
    *              compile or disassembly.
    *
    ******************************************************************************/
   
   static void
   MpEmitSerialInfo (
       void)
   {
       ACPI_SERIAL_INFO        *Info;
       char                    *Type;
       char                    *ParentPathname;
       char                    *PrevDeviceName = NULL;
       char                    *HidString;
       const AH_DEVICE_ID      *HidInfo;
       const char              *Description;
       AML_RESOURCE            *Resource;
   
   
       /* Walk the constructed serial descriptor list */
   
       Info = AslGbl_SerialList;
       while (Info)
       {
           Resource = Info->Resource;
           switch (Resource->CommonSerialBus.Type)
           {
           case AML_RESOURCE_I2C_SERIALBUSTYPE:
               Type = "I2C ";
               break;
   
           case AML_RESOURCE_SPI_SERIALBUSTYPE:
               Type = "SPI ";
               break;
   
           case AML_RESOURCE_UART_SERIALBUSTYPE:
               Type = "UART";
               break;
   
           default:
               Type = "UNKN";
               break;
           }
   
           HidString = MpGetHidViaNamestring (Info->DeviceName);
   
           /* Print header info for the controller itself */
   
           if (!PrevDeviceName ||
               strcmp (PrevDeviceName, Info->DeviceName))
           {
               FlPrintFile (ASL_FILE_MAP_OUTPUT, "\n\n%s Controller:  ",
                   Type);
               FlPrintFile (ASL_FILE_MAP_OUTPUT, "%-8s  %-28s",
                   HidString, Info->DeviceName);
   
               HidInfo = AcpiAhMatchHardwareId (HidString);
               if (HidInfo)
               {
                   FlPrintFile (ASL_FILE_MAP_OUTPUT, "  // %s",
                       HidInfo->Description);
               }
   
               FlPrintFile (ASL_FILE_MAP_OUTPUT, "\n\n");
               FlPrintFile (ASL_FILE_MAP_OUTPUT,
                   "Type  Address   Speed      Dest _HID  Destination\n");
           }
   
           PrevDeviceName = Info->DeviceName;
   
           FlPrintFile (ASL_FILE_MAP_OUTPUT, "%s   %4.4X    %8.8X    ",
               Type, Info->Address, Info->Speed);
   
           ParentPathname = NULL;
           HidString = MpGetConnectionInfo (Info->Op, 0, &Info->TargetNode,
               &ParentPathname);
           if (HidString)
           {
               /*
                * This is a Connection() field
                * Attempt to find all references to the field.
                */
               FlPrintFile (ASL_FILE_MAP_OUTPUT, "%8s   %-28s",
                   HidString, ParentPathname);
           }
           else
           {
               /* Normal resource template */
   
               HidString = MpGetParentDeviceHid (Info->Op, &Info->TargetNode,
                   &ParentPathname);
               FlPrintFile (ASL_FILE_MAP_OUTPUT, "%8s   %-28s",
                   HidString, ParentPathname);
   
               /* Get the _HID description or _DDN string */
   
               HidInfo = AcpiAhMatchHardwareId (HidString);
               if (HidInfo)
               {
                   FlPrintFile (ASL_FILE_MAP_OUTPUT, "  // %s",
                       HidInfo->Description);
               }
               else if ((Description = MpGetDdnValue (ParentPathname)))
               {
                   FlPrintFile (ASL_FILE_MAP_OUTPUT, "  // %s (_DDN)",
                       Description);
               }
           }
   
           FlPrintFile (ASL_FILE_MAP_OUTPUT, "\n");
           ACPI_FREE (ParentPathname);
           Info = Info->Next;
       }
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    MpEmitDeviceTree
    *
    * PARAMETERS:  None
    *
    * RETURN:      None
    *
    * DESCRIPTION: Emit information about all devices within the ACPI namespace.
    *
    ******************************************************************************/
   
   static void
   MpEmitDeviceTree (
       void)
   {
   
       FlPrintFile (ASL_FILE_MAP_OUTPUT, "\n\nACPI Device Tree\n");
       FlPrintFile (ASL_FILE_MAP_OUTPUT,     "----------------\n\n");
   
       FlPrintFile (ASL_FILE_MAP_OUTPUT, "Device Pathname                   "
           "_HID      Description\n\n");
   
       /* Walk the namespace from the root */
   
       (void) AcpiNsWalkNamespace (ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
           ACPI_UINT32_MAX, FALSE, MpEmitOneDevice, NULL, NULL, NULL);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    MpEmitOneDevice
    *
    * PARAMETERS:  ACPI_NAMESPACE_WALK callback
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Emit information about one ACPI device in the namespace. Used
    *              during dump of all device objects within the namespace.
    *
    ******************************************************************************/
   
   static ACPI_STATUS
   MpEmitOneDevice (
       ACPI_HANDLE             ObjHandle,
       UINT32                  NestingLevel,
       void                    *Context,
       void                    **ReturnValue)
   {
       char                    *DevicePathname;
       char                    *DdnString;
       char                    *HidString;
       const AH_DEVICE_ID      *HidInfo;
   
   
       /* Device pathname */
   
       DevicePathname = AcpiNsGetExternalPathname (
           ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle));
   
       FlPrintFile (ASL_FILE_MAP_OUTPUT, "%-32s", DevicePathname);
   
       /* _HID or _DDN */
   
       HidString = MpGetHidValue (
           ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle));
       FlPrintFile (ASL_FILE_MAP_OUTPUT, "%8s", HidString);
   
       HidInfo = AcpiAhMatchHardwareId (HidString);
       if (HidInfo)
       {
           FlPrintFile (ASL_FILE_MAP_OUTPUT, "    // %s",
               HidInfo->Description);
       }
       else if ((DdnString = MpGetDdnValue (DevicePathname)))
       {
           FlPrintFile (ASL_FILE_MAP_OUTPUT, "    // %s (_DDN)", DdnString);
       }
   
       FlPrintFile (ASL_FILE_MAP_OUTPUT, "\n");
       ACPI_FREE (DevicePathname);
       return (AE_OK);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    MpXrefDevices
    *
    * PARAMETERS:  Info                    - A GPIO Info block
    *
    * RETURN:      None
    *
    * DESCRIPTION: Cross-reference the parse tree and find all references to the
    *              specified GPIO device.
    *
    ******************************************************************************/
   
   static void
   MpXrefDevices (
       ACPI_GPIO_INFO          *Info)
   {
   
       /* Walk the entire parse tree */
   
       TrWalkParseTree (AslGbl_ParseTreeRoot, ASL_WALK_VISIT_DOWNWARD,
           MpNamespaceXrefBegin, NULL, Info);
   
       if (!Info->References)
       {
           FlPrintFile (ASL_FILE_MAP_OUTPUT, "  // **** No references in table");
       }
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    MpNamespaceXrefBegin
    *
    * PARAMETERS:  WALK_PARSE_TREE callback
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Walk parse tree callback used to cross-reference GPIO pins.
    *
    ******************************************************************************/
   
   static ACPI_STATUS
   MpNamespaceXrefBegin (
       ACPI_PARSE_OBJECT       *Op,
       UINT32                  Level,
       void                    *Context)
   {
       ACPI_GPIO_INFO          *Info = ACPI_CAST_PTR (ACPI_GPIO_INFO, Context);
       const ACPI_OPCODE_INFO  *OpInfo;
       char                    *DevicePathname;
       ACPI_PARSE_OBJECT       *ParentOp;
       char                    *HidString;
   
   
       ACPI_FUNCTION_TRACE_PTR (MpNamespaceXrefBegin, Op);
   
       /*
        * If this node is the actual declaration of a name
        * [such as the XXXX name in "Method (XXXX)"],
        * we are not interested in it here. We only care about names that
        * are references to other objects within the namespace and the
        * parent objects of name declarations
        */
       if (Op->Asl.CompileFlags & OP_IS_NAME_DECLARATION)
       {
           return (AE_OK);
       }
   
       /* We are only interested in opcodes that have an associated name */
   
       OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode);
   
       if ((OpInfo->Flags & AML_NAMED) ||
           (OpInfo->Flags & AML_CREATE))
       {
           return (AE_OK);
       }
   
       if ((Op->Asl.ParseOpcode != PARSEOP_NAMESTRING) &&
           (Op->Asl.ParseOpcode != PARSEOP_NAMESEG)    &&
           (Op->Asl.ParseOpcode != PARSEOP_METHODCALL))
       {
           return (AE_OK);
       }
   
       if (!Op->Asl.Node)
       {
           return (AE_OK);
       }
   
       ParentOp = Op->Asl.Parent;
       if (ParentOp->Asl.ParseOpcode == PARSEOP_FIELD)
       {
           return (AE_OK);
       }
   
       if (Op->Asl.Node == Info->TargetNode)
       {
           while (ParentOp && (!ParentOp->Asl.Node))
           {
               ParentOp = ParentOp->Asl.Parent;
           }
   
           if (ParentOp)
           {
               DevicePathname = AcpiNsGetExternalPathname (
                   ParentOp->Asl.Node);
   
               if (!Info->References)
               {
                   FlPrintFile (ASL_FILE_MAP_OUTPUT, "  // References:");
               }
   
               HidString = MpGetHidViaNamestring (DevicePathname);
   
               FlPrintFile (ASL_FILE_MAP_OUTPUT, " %s [%s]",
                   DevicePathname, HidString);
   
               Info->References++;
   
               ACPI_FREE (DevicePathname);
           }
       }
   
       return (AE_OK);
   }

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