sys/contrib/dev/acpica-unix-20061109/namespace/nsxfobj.c

   1 /*******************************************************************************
   2  *
   3  * Module Name: nsxfobj - Public interfaces to the ACPI subsystem
   4  *                         ACPI Object oriented interfaces
   5  *              $Revision: 1.121 $
   6  *
   7  ******************************************************************************/
   8
   9 /******************************************************************************
  10  *
  11  * 1. Copyright Notice
  12  *
  13  * Some or all of this work - Copyright (c) 1999 - 2006, Intel Corp.
  14  * All rights reserved.
  15  *
  16  * 2. License
  17  *
  18  * 2.1. This is your license from Intel Corp. under its intellectual property
  19  * rights.  You may have additional license terms from the party that provided
  20  * you this software, covering your right to use that party's intellectual
  21  * property rights.
  22  *
  23  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  24  * copy of the source code appearing in this file ("Covered Code") an
  25  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  26  * base code distributed originally by Intel ("Original Intel Code") to copy,
  27  * make derivatives, distribute, use and display any portion of the Covered
  28  * Code in any form, with the right to sublicense such rights; and
  29  *
  30  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  31  * license (with the right to sublicense), under only those claims of Intel
  32  * patents that are infringed by the Original Intel Code, to make, use, sell,
  33  * offer to sell, and import the Covered Code and derivative works thereof
  34  * solely to the minimum extent necessary to exercise the above copyright
  35  * license, and in no event shall the patent license extend to any additions
  36  * to or modifications of the Original Intel Code.  No other license or right
  37  * is granted directly or by implication, estoppel or otherwise;
  38  *
  39  * The above copyright and patent license is granted only if the following
  40  * conditions are met:
  41  *
  42  * 3. Conditions
  43  *
  44  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  45  * Redistribution of source code of any substantial portion of the Covered
  46  * Code or modification with rights to further distribute source must include
  47  * the above Copyright Notice, the above License, this list of Conditions,
  48  * and the following Disclaimer and Export Compliance provision.  In addition,
  49  * Licensee must cause all Covered Code to which Licensee contributes to
  50  * contain a file documenting the changes Licensee made to create that Covered
  51  * Code and the date of any change.  Licensee must include in that file the
  52  * documentation of any changes made by any predecessor Licensee.  Licensee
  53  * must include a prominent statement that the modification is derived,
  54  * directly or indirectly, from Original Intel Code.
  55  *
  56  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  57  * Redistribution of source code of any substantial portion of the Covered
  58  * Code or modification without rights to further distribute source must
  59  * include the following Disclaimer and Export Compliance provision in the
  60  * documentation and/or other materials provided with distribution.  In
  61  * addition, Licensee may not authorize further sublicense of source of any
  62  * portion of the Covered Code, and must include terms to the effect that the
  63  * license from Licensee to its licensee is limited to the intellectual
  64  * property embodied in the software Licensee provides to its licensee, and
  65  * not to intellectual property embodied in modifications its licensee may
  66  * make.
  67  *
  68  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  69  * substantial portion of the Covered Code or modification must reproduce the
  70  * above Copyright Notice, and the following Disclaimer and Export Compliance
  71  * provision in the documentation and/or other materials provided with the
  72  * distribution.
  73  *
  74  * 3.4. Intel retains all right, title, and interest in and to the Original
  75  * Intel Code.
  76  *
  77  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  78  * Intel shall be used in advertising or otherwise to promote the sale, use or
  79  * other dealings in products derived from or relating to the Covered Code
  80  * without prior written authorization from Intel.
  81  *
  82  * 4. Disclaimer and Export Compliance
  83  *
  84  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  85  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  86  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
  87  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
  88  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
  89  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  90  * PARTICULAR PURPOSE.
  91  *
  92  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  93  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  94  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  95  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  96  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  97  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
  98  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
  99  * LIMITED REMEDY.
 100  *
 101  * 4.3. Licensee shall not export, either directly or indirectly, any of this
 102  * software or system incorporating such software without first obtaining any
 103  * required license or other approval from the U. S. Department of Commerce or
 104  * any other agency or department of the United States Government.  In the
 105  * event Licensee exports any such software from the United States or
 106  * re-exports any such software from a foreign destination, Licensee shall
 107  * ensure that the distribution and export/re-export of the software is in
 108  * compliance with all laws, regulations, orders, or other restrictions of the
 109  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
 110  * any of its subsidiaries will export/re-export any technical data, process,
 111  * software, or service, directly or indirectly, to any country for which the
 112  * United States government or any agency thereof requires an export license,
 113  * other governmental approval, or letter of assurance, without first obtaining
 114  * such license, approval or letter.
 115  *
 116  *****************************************************************************/
 117
 118
 119 #define __NSXFOBJ_C__
 120
 121 #include "acpi.h"
 122 #include "acnamesp.h"
 123
 124
 125 #define _COMPONENT          ACPI_NAMESPACE
 126         ACPI_MODULE_NAME    ("nsxfobj")
 127
 128 /*******************************************************************************
 129  *
 130  * FUNCTION:    AcpiGetType
 131  *
 132  * PARAMETERS:  Handle          - Handle of object whose type is desired
 133  *              RetType         - Where the type will be placed
 134  *
 135  * RETURN:      Status
 136  *
 137  * DESCRIPTION: This routine returns the type associatd with a particular handle
 138  *
 139  ******************************************************************************/
 140
 141 ACPI_STATUS
 142 AcpiGetType (
 143     ACPI_HANDLE             Handle,
 144     ACPI_OBJECT_TYPE        *RetType)
 145 {
 146     ACPI_NAMESPACE_NODE     *Node;
 147     ACPI_STATUS             Status;
 148
 149
 150     /* Parameter Validation */
 151
 152     if (!RetType)
 153     {
 154         return (AE_BAD_PARAMETER);
 155     }
 156
 157     /*
 158      * Special case for the predefined Root Node
 159      * (return type ANY)
 160      */
 161     if (Handle == ACPI_ROOT_OBJECT)
 162     {
 163         *RetType = ACPI_TYPE_ANY;
 164         return (AE_OK);
 165     }
 166
 167     Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
 168     if (ACPI_FAILURE (Status))
 169     {
 170         return (Status);
 171     }
 172
 173     /* Convert and validate the handle */
 174
 175     Node = AcpiNsMapHandleToNode (Handle);
 176     if (!Node)
 177     {
 178         (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
 179         return (AE_BAD_PARAMETER);
 180     }
 181
 182     *RetType = Node->Type;
 183
 184
 185     Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
 186     return (Status);
 187 }
 188
 189 ACPI_EXPORT_SYMBOL (AcpiGetType)
 190
 191
 192 /*******************************************************************************
 193  *
 194  * FUNCTION:    AcpiGetParent
 195  *
 196  * PARAMETERS:  Handle          - Handle of object whose parent is desired
 197  *              RetHandle       - Where the parent handle will be placed
 198  *
 199  * RETURN:      Status
 200  *
 201  * DESCRIPTION: Returns a handle to the parent of the object represented by
 202  *              Handle.
 203  *
 204  ******************************************************************************/
 205
 206 ACPI_STATUS
 207 AcpiGetParent (
 208     ACPI_HANDLE             Handle,
 209     ACPI_HANDLE             *RetHandle)
 210 {
 211     ACPI_NAMESPACE_NODE     *Node;
 212     ACPI_STATUS             Status;
 213
 214
 215     if (!RetHandle)
 216     {
 217         return (AE_BAD_PARAMETER);
 218     }
 219
 220     /* Special case for the predefined Root Node (no parent) */
 221
 222     if (Handle == ACPI_ROOT_OBJECT)
 223     {
 224         return (AE_NULL_ENTRY);
 225     }
 226
 227     Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
 228     if (ACPI_FAILURE (Status))
 229     {
 230         return (Status);
 231     }
 232
 233     /* Convert and validate the handle */
 234
 235     Node = AcpiNsMapHandleToNode (Handle);
 236     if (!Node)
 237     {
 238         Status = AE_BAD_PARAMETER;
 239         goto UnlockAndExit;
 240     }
 241
 242     /* Get the parent entry */
 243
 244     *RetHandle =
 245         AcpiNsConvertEntryToHandle (AcpiNsGetParentNode (Node));
 246
 247     /* Return exception if parent is null */
 248
 249     if (!AcpiNsGetParentNode (Node))
 250     {
 251         Status = AE_NULL_ENTRY;
 252     }
 253
 254
 255 UnlockAndExit:
 256
 257     (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
 258     return (Status);
 259 }
 260
 261 ACPI_EXPORT_SYMBOL (AcpiGetParent)
 262
 263
 264 /*******************************************************************************
 265  *
 266  * FUNCTION:    AcpiGetNextObject
 267  *
 268  * PARAMETERS:  Type            - Type of object to be searched for
 269  *              Parent          - Parent object whose children we are getting
 270  *              LastChild       - Previous child that was found.
 271  *                                The NEXT child will be returned
 272  *              RetHandle       - Where handle to the next object is placed
 273  *
 274  * RETURN:      Status
 275  *
 276  * DESCRIPTION: Return the next peer object within the namespace.  If Handle is
 277  *              valid, Scope is ignored.  Otherwise, the first object within
 278  *              Scope is returned.
 279  *
 280  ******************************************************************************/
 281
 282 ACPI_STATUS
 283 AcpiGetNextObject (
 284     ACPI_OBJECT_TYPE        Type,
 285     ACPI_HANDLE             Parent,
 286     ACPI_HANDLE             Child,
 287     ACPI_HANDLE             *RetHandle)
 288 {
 289     ACPI_STATUS             Status;
 290     ACPI_NAMESPACE_NODE     *Node;
 291     ACPI_NAMESPACE_NODE     *ParentNode = NULL;
 292     ACPI_NAMESPACE_NODE     *ChildNode = NULL;
 293
 294
 295     /* Parameter validation */
 296
 297     if (Type > ACPI_TYPE_EXTERNAL_MAX)
 298     {
 299         return (AE_BAD_PARAMETER);
 300     }
 301
 302     Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
 303     if (ACPI_FAILURE (Status))
 304     {
 305         return (Status);
 306     }
 307
 308     /* If null handle, use the parent */
 309
 310     if (!Child)
 311     {
 312         /* Start search at the beginning of the specified scope */
 313
 314         ParentNode = AcpiNsMapHandleToNode (Parent);
 315         if (!ParentNode)
 316         {
 317             Status = AE_BAD_PARAMETER;
 318             goto UnlockAndExit;
 319         }
 320     }
 321     else
 322     {
 323         /* Non-null handle, ignore the parent */
 324         /* Convert and validate the handle */
 325
 326         ChildNode = AcpiNsMapHandleToNode (Child);
 327         if (!ChildNode)
 328         {
 329             Status = AE_BAD_PARAMETER;
 330             goto UnlockAndExit;
 331         }
 332     }
 333
 334     /* Internal function does the real work */
 335
 336     Node = AcpiNsGetNextNode (Type, ParentNode, ChildNode);
 337     if (!Node)
 338     {
 339         Status = AE_NOT_FOUND;
 340         goto UnlockAndExit;
 341     }
 342
 343     if (RetHandle)
 344     {
 345         *RetHandle = AcpiNsConvertEntryToHandle (Node);
 346     }
 347
 348
 349 UnlockAndExit:
 350
 351     (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
 352     return (Status);
 353 }
 354
 355 ACPI_EXPORT_SYMBOL (AcpiGetNextObject)
 356