sys/contrib/dev/acpica-unix-20050211/interpreter/parser/pstree.c

   1 /******************************************************************************
   2  *
   3  * Module Name: pstree - Parser op tree manipulation/traversal/search
   4  *              $Revision: 43 $
   5  *
   6  *****************************************************************************/
   7
   8 /******************************************************************************
   9  *
  10  * 1. Copyright Notice
  11  *
  12  * Some or all of this work - Copyright (c) 1999 - 2005, Intel Corp.
  13  * All rights reserved.
  14  *
  15  * 2. License
  16  *
  17  * 2.1. This is your license from Intel Corp. under its intellectual property
  18  * rights.  You may have additional license terms from the party that provided
  19  * you this software, covering your right to use that party's intellectual
  20  * property rights.
  21  *
  22  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  23  * copy of the source code appearing in this file ("Covered Code") an
  24  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  25  * base code distributed originally by Intel ("Original Intel Code") to copy,
  26  * make derivatives, distribute, use and display any portion of the Covered
  27  * Code in any form, with the right to sublicense such rights; and
  28  *
  29  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  30  * license (with the right to sublicense), under only those claims of Intel
  31  * patents that are infringed by the Original Intel Code, to make, use, sell,
  32  * offer to sell, and import the Covered Code and derivative works thereof
  33  * solely to the minimum extent necessary to exercise the above copyright
  34  * license, and in no event shall the patent license extend to any additions
  35  * to or modifications of the Original Intel Code.  No other license or right
  36  * is granted directly or by implication, estoppel or otherwise;
  37  *
  38  * The above copyright and patent license is granted only if the following
  39  * conditions are met:
  40  *
  41  * 3. Conditions
  42  *
  43  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  44  * Redistribution of source code of any substantial portion of the Covered
  45  * Code or modification with rights to further distribute source must include
  46  * the above Copyright Notice, the above License, this list of Conditions,
  47  * and the following Disclaimer and Export Compliance provision.  In addition,
  48  * Licensee must cause all Covered Code to which Licensee contributes to
  49  * contain a file documenting the changes Licensee made to create that Covered
  50  * Code and the date of any change.  Licensee must include in that file the
  51  * documentation of any changes made by any predecessor Licensee.  Licensee
  52  * must include a prominent statement that the modification is derived,
  53  * directly or indirectly, from Original Intel Code.
  54  *
  55  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  56  * Redistribution of source code of any substantial portion of the Covered
  57  * Code or modification without rights to further distribute source must
  58  * include the following Disclaimer and Export Compliance provision in the
  59  * documentation and/or other materials provided with distribution.  In
  60  * addition, Licensee may not authorize further sublicense of source of any
  61  * portion of the Covered Code, and must include terms to the effect that the
  62  * license from Licensee to its licensee is limited to the intellectual
  63  * property embodied in the software Licensee provides to its licensee, and
  64  * not to intellectual property embodied in modifications its licensee may
  65  * make.
  66  *
  67  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  68  * substantial portion of the Covered Code or modification must reproduce the
  69  * above Copyright Notice, and the following Disclaimer and Export Compliance
  70  * provision in the documentation and/or other materials provided with the
  71  * distribution.
  72  *
  73  * 3.4. Intel retains all right, title, and interest in and to the Original
  74  * Intel Code.
  75  *
  76  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  77  * Intel shall be used in advertising or otherwise to promote the sale, use or
  78  * other dealings in products derived from or relating to the Covered Code
  79  * without prior written authorization from Intel.
  80  *
  81  * 4. Disclaimer and Export Compliance
  82  *
  83  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  84  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  85  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
  86  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
  87  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
  88  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  89  * PARTICULAR PURPOSE.
  90  *
  91  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  92  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  93  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  94  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  95  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  96  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
  97  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
  98  * LIMITED REMEDY.
  99  *
 100  * 4.3. Licensee shall not export, either directly or indirectly, any of this
 101  * software or system incorporating such software without first obtaining any
 102  * required license or other approval from the U. S. Department of Commerce or
 103  * any other agency or department of the United States Government.  In the
 104  * event Licensee exports any such software from the United States or
 105  * re-exports any such software from a foreign destination, Licensee shall
 106  * ensure that the distribution and export/re-export of the software is in
 107  * compliance with all laws, regulations, orders, or other restrictions of the
 108  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
 109  * any of its subsidiaries will export/re-export any technical data, process,
 110  * software, or service, directly or indirectly, to any country for which the
 111  * United States government or any agency thereof requires an export license,
 112  * other governmental approval, or letter of assurance, without first obtaining
 113  * such license, approval or letter.
 114  *
 115  *****************************************************************************/
 116
 117
 118 #define __PSTREE_C__
 119
 120 #include "acpi.h"
 121 #include "acparser.h"
 122 #include "amlcode.h"
 123
 124 #define _COMPONENT          ACPI_PARSER
 125         ACPI_MODULE_NAME    ("pstree")
 126
 127
 128 /*******************************************************************************
 129  *
 130  * FUNCTION:    AcpiPsGetArg
 131  *
 132  * PARAMETERS:  Op              - Get an argument for this op
 133  *              Argn            - Nth argument to get
 134  *
 135  * RETURN:      The argument (as an Op object).  NULL if argument does not exist
 136  *
 137  * DESCRIPTION: Get the specified op's argument.
 138  *
 139  ******************************************************************************/
 140
 141 ACPI_PARSE_OBJECT *
 142 AcpiPsGetArg (
 143     ACPI_PARSE_OBJECT       *Op,
 144     UINT32                  Argn)
 145 {
 146     ACPI_PARSE_OBJECT       *Arg = NULL;
 147     const ACPI_OPCODE_INFO  *OpInfo;
 148
 149
 150     ACPI_FUNCTION_ENTRY ();
 151
 152
 153     /* Get the info structure for this opcode */
 154
 155     OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
 156     if (OpInfo->Class == AML_CLASS_UNKNOWN)
 157     {
 158         /* Invalid opcode or ASCII character */
 159
 160         return (NULL);
 161     }
 162
 163     /* Check if this opcode requires argument sub-objects */
 164
 165     if (!(OpInfo->Flags & AML_HAS_ARGS))
 166     {
 167         /* Has no linked argument objects */
 168
 169         return (NULL);
 170     }
 171
 172     /* Get the requested argument object */
 173
 174     Arg = Op->Common.Value.Arg;
 175     while (Arg && Argn)
 176     {
 177         Argn--;
 178         Arg = Arg->Common.Next;
 179     }
 180
 181     return (Arg);
 182 }
 183
 184
 185 /*******************************************************************************
 186  *
 187  * FUNCTION:    AcpiPsAppendArg
 188  *
 189  * PARAMETERS:  Op              - Append an argument to this Op.
 190  *              Arg             - Argument Op to append
 191  *
 192  * RETURN:      None.
 193  *
 194  * DESCRIPTION: Append an argument to an op's argument list (a NULL arg is OK)
 195  *
 196  ******************************************************************************/
 197
 198 void
 199 AcpiPsAppendArg (
 200     ACPI_PARSE_OBJECT       *Op,
 201     ACPI_PARSE_OBJECT       *Arg)
 202 {
 203     ACPI_PARSE_OBJECT       *PrevArg;
 204     const ACPI_OPCODE_INFO  *OpInfo;
 205
 206
 207     ACPI_FUNCTION_ENTRY ();
 208
 209
 210     if (!Op)
 211     {
 212         return;
 213     }
 214
 215     /* Get the info structure for this opcode */
 216
 217     OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
 218     if (OpInfo->Class == AML_CLASS_UNKNOWN)
 219     {
 220         /* Invalid opcode */
 221
 222         ACPI_REPORT_ERROR (("PsAppendArg: Invalid AML Opcode: 0x%2.2X\n",
 223             Op->Common.AmlOpcode));
 224         return;
 225     }
 226
 227     /* Check if this opcode requires argument sub-objects */
 228
 229     if (!(OpInfo->Flags & AML_HAS_ARGS))
 230     {
 231         /* Has no linked argument objects */
 232
 233         return;
 234     }
 235
 236
 237     /* Append the argument to the linked argument list */
 238
 239     if (Op->Common.Value.Arg)
 240     {
 241         /* Append to existing argument list */
 242
 243         PrevArg = Op->Common.Value.Arg;
 244         while (PrevArg->Common.Next)
 245         {
 246             PrevArg = PrevArg->Common.Next;
 247         }
 248         PrevArg->Common.Next = Arg;
 249     }
 250
 251     else
 252     {
 253         /* No argument list, this will be the first argument */
 254
 255         Op->Common.Value.Arg = Arg;
 256     }
 257
 258
 259     /* Set the parent in this arg and any args linked after it */
 260
 261     while (Arg)
 262     {
 263         Arg->Common.Parent = Op;
 264         Arg = Arg->Common.Next;
 265     }
 266 }
 267
 268
 269 /*******************************************************************************
 270  *
 271  * FUNCTION:    AcpiPsGetChild
 272  *
 273  * PARAMETERS:  Op              - Get the child of this Op
 274  *
 275  * RETURN:      Child Op, Null if none is found.
 276  *
 277  * DESCRIPTION: Get op's children or NULL if none
 278  *
 279  ******************************************************************************/
 280
 281 ACPI_PARSE_OBJECT *
 282 AcpiPsGetChild (
 283     ACPI_PARSE_OBJECT       *Op)
 284 {
 285     ACPI_PARSE_OBJECT       *Child = NULL;
 286
 287
 288     ACPI_FUNCTION_ENTRY ();
 289
 290
 291     switch (Op->Common.AmlOpcode)
 292     {
 293     case AML_SCOPE_OP:
 294     case AML_ELSE_OP:
 295     case AML_DEVICE_OP:
 296     case AML_THERMAL_ZONE_OP:
 297     case AML_INT_METHODCALL_OP:
 298
 299         Child = AcpiPsGetArg (Op, 0);
 300         break;
 301
 302
 303     case AML_BUFFER_OP:
 304     case AML_PACKAGE_OP:
 305     case AML_METHOD_OP:
 306     case AML_IF_OP:
 307     case AML_WHILE_OP:
 308     case AML_FIELD_OP:
 309
 310         Child = AcpiPsGetArg (Op, 1);
 311         break;
 312
 313
 314     case AML_POWER_RES_OP:
 315     case AML_INDEX_FIELD_OP:
 316
 317         Child = AcpiPsGetArg (Op, 2);
 318         break;
 319
 320
 321     case AML_PROCESSOR_OP:
 322     case AML_BANK_FIELD_OP:
 323
 324         Child = AcpiPsGetArg (Op, 3);
 325         break;
 326
 327
 328     default:
 329         /* All others have no children */
 330         break;
 331     }
 332
 333     return (Child);
 334 }
 335
 336
 337 /*******************************************************************************
 338  *
 339  * FUNCTION:    AcpiPsGetDepthNext
 340  *
 341  * PARAMETERS:  Origin          - Root of subtree to search
 342  *              Op              - Last (previous) Op that was found
 343  *
 344  * RETURN:      Next Op found in the search.
 345  *
 346  * DESCRIPTION: Get next op in tree (walking the tree in depth-first order)
 347  *              Return NULL when reaching "origin" or when walking up from root
 348  *
 349  ******************************************************************************/
 350
 351 ACPI_PARSE_OBJECT *
 352 AcpiPsGetDepthNext (
 353     ACPI_PARSE_OBJECT       *Origin,
 354     ACPI_PARSE_OBJECT       *Op)
 355 {
 356     ACPI_PARSE_OBJECT       *Next = NULL;
 357     ACPI_PARSE_OBJECT       *Parent;
 358     ACPI_PARSE_OBJECT       *Arg;
 359
 360
 361     ACPI_FUNCTION_ENTRY ();
 362
 363
 364     if (!Op)
 365     {
 366         return (NULL);
 367     }
 368
 369     /* look for an argument or child */
 370
 371     Next = AcpiPsGetArg (Op, 0);
 372     if (Next)
 373     {
 374         return (Next);
 375     }
 376
 377     /* look for a sibling */
 378
 379     Next = Op->Common.Next;
 380     if (Next)
 381     {
 382         return (Next);
 383     }
 384
 385     /* look for a sibling of parent */
 386
 387     Parent = Op->Common.Parent;
 388
 389     while (Parent)
 390     {
 391         Arg = AcpiPsGetArg (Parent, 0);
 392         while (Arg && (Arg != Origin) && (Arg != Op))
 393         {
 394             Arg = Arg->Common.Next;
 395         }
 396
 397         if (Arg == Origin)
 398         {
 399             /* reached parent of origin, end search */
 400
 401             return (NULL);
 402         }
 403
 404         if (Parent->Common.Next)
 405         {
 406             /* found sibling of parent */
 407
 408             return (Parent->Common.Next);
 409         }
 410
 411         Op = Parent;
 412         Parent = Parent->Common.Parent;
 413     }
 414
 415     return (Next);
 416 }
 417
 418