arch/all-pc/acpica/source/components/parser/pstree.c

   1 /******************************************************************************
   2  *
   3  * Module Name: pstree - Parser op tree manipulation/traversal/search
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2013, Intel Corp.
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions, and the following disclaimer,
  16  *    without modification.
  17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18  *    substantially similar to the "NO WARRANTY" disclaimer below
  19  *    ("Disclaimer") and any redistribution must be conditioned upon
  20  *    including a substantially similar Disclaimer requirement for further
  21  *    binary redistribution.
  22  * 3. Neither the names of the above-listed copyright holders nor the names
  23  *    of any contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * Alternatively, this software may be distributed under the terms of the
  27  * GNU General Public License ("GPL") version 2 as published by the Free
  28  * Software Foundation.
  29  *
  30  * NO WARRANTY
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGES.
  42  */
  43
  44
  45 #define __PSTREE_C__
  46
  47 #include "acpi.h"
  48 #include "accommon.h"
  49 #include "acparser.h"
  50 #include "amlcode.h"
  51
  52 #define _COMPONENT          ACPI_PARSER
  53         ACPI_MODULE_NAME    ("pstree")
  54
  55 /* Local prototypes */
  56
  57 #ifdef ACPI_OBSOLETE_FUNCTIONS
  58 ACPI_PARSE_OBJECT *
  59 AcpiPsGetChild (
  60     ACPI_PARSE_OBJECT       *op);
  61 #endif
  62
  63
  64 /*******************************************************************************
  65  *
  66  * FUNCTION:    AcpiPsGetArg
  67  *
  68  * PARAMETERS:  Op              - Get an argument for this op
  69  *              Argn            - Nth argument to get
  70  *
  71  * RETURN:      The argument (as an Op object). NULL if argument does not exist
  72  *
  73  * DESCRIPTION: Get the specified op's argument.
  74  *
  75  ******************************************************************************/
  76
  77 ACPI_PARSE_OBJECT *
  78 AcpiPsGetArg (
  79     ACPI_PARSE_OBJECT       *Op,
  80     UINT32                  Argn)
  81 {
  82     ACPI_PARSE_OBJECT       *Arg = NULL;
  83     const ACPI_OPCODE_INFO  *OpInfo;
  84
  85
  86     ACPI_FUNCTION_ENTRY ();
  87
  88 /*
  89     if (Op->Common.AmlOpcode == AML_INT_CONNECTION_OP)
  90     {
  91         return (Op->Common.Value.Arg);
  92     }
  93 */
  94     /* Get the info structure for this opcode */
  95
  96     OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
  97     if (OpInfo->Class == AML_CLASS_UNKNOWN)
  98     {
  99         /* Invalid opcode or ASCII character */
 100
 101         return (NULL);
 102     }
 103
 104     /* Check if this opcode requires argument sub-objects */
 105
 106     if (!(OpInfo->Flags & AML_HAS_ARGS))
 107     {
 108         /* Has no linked argument objects */
 109
 110         return (NULL);
 111     }
 112
 113     /* Get the requested argument object */
 114
 115     Arg = Op->Common.Value.Arg;
 116     while (Arg && Argn)
 117     {
 118         Argn--;
 119         Arg = Arg->Common.Next;
 120     }
 121
 122     return (Arg);
 123 }
 124
 125
 126 /*******************************************************************************
 127  *
 128  * FUNCTION:    AcpiPsAppendArg
 129  *
 130  * PARAMETERS:  Op              - Append an argument to this Op.
 131  *              Arg             - Argument Op to append
 132  *
 133  * RETURN:      None.
 134  *
 135  * DESCRIPTION: Append an argument to an op's argument list (a NULL arg is OK)
 136  *
 137  ******************************************************************************/
 138
 139 void
 140 AcpiPsAppendArg (
 141     ACPI_PARSE_OBJECT       *Op,
 142     ACPI_PARSE_OBJECT       *Arg)
 143 {
 144     ACPI_PARSE_OBJECT       *PrevArg;
 145     const ACPI_OPCODE_INFO  *OpInfo;
 146
 147
 148     ACPI_FUNCTION_ENTRY ();
 149
 150
 151     if (!Op)
 152     {
 153         return;
 154     }
 155
 156     /* Get the info structure for this opcode */
 157
 158     OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
 159     if (OpInfo->Class == AML_CLASS_UNKNOWN)
 160     {
 161         /* Invalid opcode */
 162
 163         ACPI_ERROR ((AE_INFO, "Invalid AML Opcode: 0x%2.2X",
 164             Op->Common.AmlOpcode));
 165         return;
 166     }
 167
 168     /* Check if this opcode requires argument sub-objects */
 169
 170     if (!(OpInfo->Flags & AML_HAS_ARGS))
 171     {
 172         /* Has no linked argument objects */
 173
 174         return;
 175     }
 176
 177     /* Append the argument to the linked argument list */
 178
 179     if (Op->Common.Value.Arg)
 180     {
 181         /* Append to existing argument list */
 182
 183         PrevArg = Op->Common.Value.Arg;
 184         while (PrevArg->Common.Next)
 185         {
 186             PrevArg = PrevArg->Common.Next;
 187         }
 188         PrevArg->Common.Next = Arg;
 189     }
 190     else
 191     {
 192         /* No argument list, this will be the first argument */
 193
 194         Op->Common.Value.Arg = Arg;
 195     }
 196
 197     /* Set the parent in this arg and any args linked after it */
 198
 199     while (Arg)
 200     {
 201         Arg->Common.Parent = Op;
 202         Arg = Arg->Common.Next;
 203
 204         Op->Common.ArgListLength++;
 205     }
 206 }
 207
 208
 209 /*******************************************************************************
 210  *
 211  * FUNCTION:    AcpiPsGetDepthNext
 212  *
 213  * PARAMETERS:  Origin          - Root of subtree to search
 214  *              Op              - Last (previous) Op that was found
 215  *
 216  * RETURN:      Next Op found in the search.
 217  *
 218  * DESCRIPTION: Get next op in tree (walking the tree in depth-first order)
 219  *              Return NULL when reaching "origin" or when walking up from root
 220  *
 221  ******************************************************************************/
 222
 223 ACPI_PARSE_OBJECT *
 224 AcpiPsGetDepthNext (
 225     ACPI_PARSE_OBJECT       *Origin,
 226     ACPI_PARSE_OBJECT       *Op)
 227 {
 228     ACPI_PARSE_OBJECT       *Next = NULL;
 229     ACPI_PARSE_OBJECT       *Parent;
 230     ACPI_PARSE_OBJECT       *Arg;
 231
 232
 233     ACPI_FUNCTION_ENTRY ();
 234
 235
 236     if (!Op)
 237     {
 238         return (NULL);
 239     }
 240
 241     /* Look for an argument or child */
 242
 243     Next = AcpiPsGetArg (Op, 0);
 244     if (Next)
 245     {
 246         return (Next);
 247     }
 248
 249     /* Look for a sibling */
 250
 251     Next = Op->Common.Next;
 252     if (Next)
 253     {
 254         return (Next);
 255     }
 256
 257     /* Look for a sibling of parent */
 258
 259     Parent = Op->Common.Parent;
 260
 261     while (Parent)
 262     {
 263         Arg = AcpiPsGetArg (Parent, 0);
 264         while (Arg && (Arg != Origin) && (Arg != Op))
 265         {
 266             Arg = Arg->Common.Next;
 267         }
 268
 269         if (Arg == Origin)
 270         {
 271             /* Reached parent of origin, end search */
 272
 273             return (NULL);
 274         }
 275
 276         if (Parent->Common.Next)
 277         {
 278             /* Found sibling of parent */
 279
 280             return (Parent->Common.Next);
 281         }
 282
 283         Op = Parent;
 284         Parent = Parent->Common.Parent;
 285     }
 286
 287     return (Next);
 288 }
 289
 290
 291 #ifdef ACPI_OBSOLETE_FUNCTIONS
 292 /*******************************************************************************
 293  *
 294  * FUNCTION:    AcpiPsGetChild
 295  *
 296  * PARAMETERS:  Op              - Get the child of this Op
 297  *
 298  * RETURN:      Child Op, Null if none is found.
 299  *
 300  * DESCRIPTION: Get op's children or NULL if none
 301  *
 302  ******************************************************************************/
 303
 304 ACPI_PARSE_OBJECT *
 305 AcpiPsGetChild (
 306     ACPI_PARSE_OBJECT       *Op)
 307 {
 308     ACPI_PARSE_OBJECT       *Child = NULL;
 309
 310
 311     ACPI_FUNCTION_ENTRY ();
 312
 313
 314     switch (Op->Common.AmlOpcode)
 315     {
 316     case AML_SCOPE_OP:
 317     case AML_ELSE_OP:
 318     case AML_DEVICE_OP:
 319     case AML_THERMAL_ZONE_OP:
 320     case AML_INT_METHODCALL_OP:
 321
 322         Child = AcpiPsGetArg (Op, 0);
 323         break;
 324
 325     case AML_BUFFER_OP:
 326     case AML_PACKAGE_OP:
 327     case AML_METHOD_OP:
 328     case AML_IF_OP:
 329     case AML_WHILE_OP:
 330     case AML_FIELD_OP:
 331
 332         Child = AcpiPsGetArg (Op, 1);
 333         break;
 334
 335     case AML_POWER_RES_OP:
 336     case AML_INDEX_FIELD_OP:
 337
 338         Child = AcpiPsGetArg (Op, 2);
 339         break;
 340
 341     case AML_PROCESSOR_OP:
 342     case AML_BANK_FIELD_OP:
 343
 344         Child = AcpiPsGetArg (Op, 3);
 345         break;
 346
 347     default:
 348
 349         /* All others have no children */
 350
 351         break;
 352     }
 353
 354     return (Child);
 355 }
 356 #endif