drivers/acpi/acpica/dswexec.c

   1 /******************************************************************************
   2  *
   3  * Module Name: dswexec - Dispatcher method execution callbacks;
   4  *                        dispatch to interpreter.
   5  *
   6  *****************************************************************************/
   7
   8 /*
   9  * Copyright (C) 2000 - 2010, Intel Corp.
  10  * All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions, and the following disclaimer,
  17  *    without modification.
  18  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  19  *    substantially similar to the "NO WARRANTY" disclaimer below
  20  *    ("Disclaimer") and any redistribution must be conditioned upon
  21  *    including a substantially similar Disclaimer requirement for further
  22  *    binary redistribution.
  23  * 3. Neither the names of the above-listed copyright holders nor the names
  24  *    of any contributors may be used to endorse or promote products derived
  25  *    from this software without specific prior written permission.
  26  *
  27  * Alternatively, this software may be distributed under the terms of the
  28  * GNU General Public License ("GPL") version 2 as published by the Free
  29  * Software Foundation.
  30  *
  31  * NO WARRANTY
  32  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  33  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  34  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  35  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  36  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  40  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  41  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  42  * POSSIBILITY OF SUCH DAMAGES.
  43  */
  44
  45 #include <acpi/acpi.h>
  46 #include "accommon.h"
  47 #include "acparser.h"
  48 #include "amlcode.h"
  49 #include "acdispat.h"
  50 #include "acinterp.h"
  51 #include "acnamesp.h"
  52 #include "acdebug.h"
  53
  54 #define _COMPONENT          ACPI_DISPATCHER
  55 ACPI_MODULE_NAME("dswexec")
  56
  57 /*
  58  * Dispatch table for opcode classes
  59  */
  60 static ACPI_EXECUTE_OP acpi_gbl_op_type_dispatch[] = {
  61         acpi_ex_opcode_0A_0T_1R,
  62         acpi_ex_opcode_1A_0T_0R,
  63         acpi_ex_opcode_1A_0T_1R,
  64         acpi_ex_opcode_1A_1T_0R,
  65         acpi_ex_opcode_1A_1T_1R,
  66         acpi_ex_opcode_2A_0T_0R,
  67         acpi_ex_opcode_2A_0T_1R,
  68         acpi_ex_opcode_2A_1T_1R,
  69         acpi_ex_opcode_2A_2T_1R,
  70         acpi_ex_opcode_3A_0T_0R,
  71         acpi_ex_opcode_3A_1T_1R,
  72         acpi_ex_opcode_6A_0T_1R
  73 };
  74
  75 /*****************************************************************************
  76  *
  77  * FUNCTION:    acpi_ds_get_predicate_value
  78  *
  79  * PARAMETERS:  walk_state      - Current state of the parse tree walk
  80  *              result_obj      - if non-zero, pop result from result stack
  81  *
  82  * RETURN:      Status
  83  *
  84  * DESCRIPTION: Get the result of a predicate evaluation
  85  *
  86  ****************************************************************************/
  87
  88 acpi_status
  89 acpi_ds_get_predicate_value(struct acpi_walk_state *walk_state,
  90                             union acpi_operand_object *result_obj)
  91 {
  92         acpi_status status = AE_OK;
  93         union acpi_operand_object *obj_desc;
  94         union acpi_operand_object *local_obj_desc = NULL;
  95
  96         ACPI_FUNCTION_TRACE_PTR(ds_get_predicate_value, walk_state);
  97
  98         walk_state->control_state->common.state = 0;
  99
 100         if (result_obj) {
 101                 status = acpi_ds_result_pop(&obj_desc, walk_state);
 102                 if (ACPI_FAILURE(status)) {
 103                         ACPI_EXCEPTION((AE_INFO, status,
 104                                         "Could not get result from predicate evaluation"));
 105
 106                         return_ACPI_STATUS(status);
 107                 }
 108         } else {
 109                 status = acpi_ds_create_operand(walk_state, walk_state->op, 0);
 110                 if (ACPI_FAILURE(status)) {
 111                         return_ACPI_STATUS(status);
 112                 }
 113
 114                 status =
 115                     acpi_ex_resolve_to_value(&walk_state->operands[0],
 116                                              walk_state);
 117                 if (ACPI_FAILURE(status)) {
 118                         return_ACPI_STATUS(status);
 119                 }
 120
 121                 obj_desc = walk_state->operands[0];
 122         }
 123
 124         if (!obj_desc) {
 125                 ACPI_ERROR((AE_INFO,
 126                             "No predicate ObjDesc=%p State=%p",
 127                             obj_desc, walk_state));
 128
 129                 return_ACPI_STATUS(AE_AML_NO_OPERAND);
 130         }
 131
 132         /*
 133          * Result of predicate evaluation must be an Integer
 134          * object. Implicitly convert the argument if necessary.
 135          */
 136         status = acpi_ex_convert_to_integer(obj_desc, &local_obj_desc, 16);
 137         if (ACPI_FAILURE(status)) {
 138                 goto cleanup;
 139         }
 140
 141         if (local_obj_desc->common.type != ACPI_TYPE_INTEGER) {
 142                 ACPI_ERROR((AE_INFO,
 143                             "Bad predicate (not an integer) ObjDesc=%p State=%p Type=%X",
 144                             obj_desc, walk_state, obj_desc->common.type));
 145
 146                 status = AE_AML_OPERAND_TYPE;
 147                 goto cleanup;
 148         }
 149
 150         /* Truncate the predicate to 32-bits if necessary */
 151
 152         acpi_ex_truncate_for32bit_table(local_obj_desc);
 153
 154         /*
 155          * Save the result of the predicate evaluation on
 156          * the control stack
 157          */
 158         if (local_obj_desc->integer.value) {
 159                 walk_state->control_state->common.value = TRUE;
 160         } else {
 161                 /*
 162                  * Predicate is FALSE, we will just toss the
 163                  * rest of the package
 164                  */
 165                 walk_state->control_state->common.value = FALSE;
 166                 status = AE_CTRL_FALSE;
 167         }
 168
 169         /* Predicate can be used for an implicit return value */
 170
 171         (void)acpi_ds_do_implicit_return(local_obj_desc, walk_state, TRUE);
 172
 173       cleanup:
 174
 175         ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Completed a predicate eval=%X Op=%p\n",
 176                           walk_state->control_state->common.value,
 177                           walk_state->op));
 178
 179         /* Break to debugger to display result */
 180
 181         ACPI_DEBUGGER_EXEC(acpi_db_display_result_object
 182                            (local_obj_desc, walk_state));
 183
 184         /*
 185          * Delete the predicate result object (we know that
 186          * we don't need it anymore)
 187          */
 188         if (local_obj_desc != obj_desc) {
 189                 acpi_ut_remove_reference(local_obj_desc);
 190         }
 191         acpi_ut_remove_reference(obj_desc);
 192
 193         walk_state->control_state->common.state = ACPI_CONTROL_NORMAL;
 194         return_ACPI_STATUS(status);
 195 }
 196
 197 /*****************************************************************************
 198  *
 199  * FUNCTION:    acpi_ds_exec_begin_op
 200  *
 201  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 202  *              out_op          - Where to return op if a new one is created
 203  *
 204  * RETURN:      Status
 205  *
 206  * DESCRIPTION: Descending callback used during the execution of control
 207  *              methods.  This is where most operators and operands are
 208  *              dispatched to the interpreter.
 209  *
 210  ****************************************************************************/
 211
 212 acpi_status
 213 acpi_ds_exec_begin_op(struct acpi_walk_state *walk_state,
 214                       union acpi_parse_object **out_op)
 215 {
 216         union acpi_parse_object *op;
 217         acpi_status status = AE_OK;
 218         u32 opcode_class;
 219
 220         ACPI_FUNCTION_TRACE_PTR(ds_exec_begin_op, walk_state);
 221
 222         op = walk_state->op;
 223         if (!op) {
 224                 status = acpi_ds_load2_begin_op(walk_state, out_op);
 225                 if (ACPI_FAILURE(status)) {
 226                         goto error_exit;
 227                 }
 228
 229                 op = *out_op;
 230                 walk_state->op = op;
 231                 walk_state->opcode = op->common.aml_opcode;
 232                 walk_state->op_info =
 233                     acpi_ps_get_opcode_info(op->common.aml_opcode);
 234
 235                 if (acpi_ns_opens_scope(walk_state->op_info->object_type)) {
 236                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 237                                           "(%s) Popping scope for Op %p\n",
 238                                           acpi_ut_get_type_name(walk_state->
 239                                                                 op_info->
 240                                                                 object_type),
 241                                           op));
 242
 243                         status = acpi_ds_scope_stack_pop(walk_state);
 244                         if (ACPI_FAILURE(status)) {
 245                                 goto error_exit;
 246                         }
 247                 }
 248         }
 249
 250         if (op == walk_state->origin) {
 251                 if (out_op) {
 252                         *out_op = op;
 253                 }
 254
 255                 return_ACPI_STATUS(AE_OK);
 256         }
 257
 258         /*
 259          * If the previous opcode was a conditional, this opcode
 260          * must be the beginning of the associated predicate.
 261          * Save this knowledge in the current scope descriptor
 262          */
 263         if ((walk_state->control_state) &&
 264             (walk_state->control_state->common.state ==
 265              ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
 266                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 267                                   "Exec predicate Op=%p State=%p\n", op,
 268                                   walk_state));
 269
 270                 walk_state->control_state->common.state =
 271                     ACPI_CONTROL_PREDICATE_EXECUTING;
 272
 273                 /* Save start of predicate */
 274
 275                 walk_state->control_state->control.predicate_op = op;
 276         }
 277
 278         opcode_class = walk_state->op_info->class;
 279
 280         /* We want to send namepaths to the load code */
 281
 282         if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
 283                 opcode_class = AML_CLASS_NAMED_OBJECT;
 284         }
 285
 286         /*
 287          * Handle the opcode based upon the opcode type
 288          */
 289         switch (opcode_class) {
 290         case AML_CLASS_CONTROL:
 291
 292                 status = acpi_ds_exec_begin_control_op(walk_state, op);
 293                 break;
 294
 295         case AML_CLASS_NAMED_OBJECT:
 296
 297                 if (walk_state->walk_type & ACPI_WALK_METHOD) {
 298                         /*
 299                          * Found a named object declaration during method execution;
 300                          * we must enter this object into the namespace.  The created
 301                          * object is temporary and will be deleted upon completion of
 302                          * the execution of this method.
 303                          */
 304                         status = acpi_ds_load2_begin_op(walk_state, NULL);
 305                 }
 306
 307                 break;
 308
 309         case AML_CLASS_EXECUTE:
 310         case AML_CLASS_CREATE:
 311
 312                 break;
 313
 314         default:
 315                 break;
 316         }
 317
 318         /* Nothing to do here during method execution */
 319
 320         return_ACPI_STATUS(status);
 321
 322       error_exit:
 323         status = acpi_ds_method_error(status, walk_state);
 324         return_ACPI_STATUS(status);
 325 }
 326
 327 /*****************************************************************************
 328  *
 329  * FUNCTION:    acpi_ds_exec_end_op
 330  *
 331  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 332  *
 333  * RETURN:      Status
 334  *
 335  * DESCRIPTION: Ascending callback used during the execution of control
 336  *              methods.  The only thing we really need to do here is to
 337  *              notice the beginning of IF, ELSE, and WHILE blocks.
 338  *
 339  ****************************************************************************/
 340
 341 acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state)
 342 {
 343         union acpi_parse_object *op;
 344         acpi_status status = AE_OK;
 345         u32 op_type;
 346         u32 op_class;
 347         union acpi_parse_object *next_op;
 348         union acpi_parse_object *first_arg;
 349
 350         ACPI_FUNCTION_TRACE_PTR(ds_exec_end_op, walk_state);
 351
 352         op = walk_state->op;
 353         op_type = walk_state->op_info->type;
 354         op_class = walk_state->op_info->class;
 355
 356         if (op_class == AML_CLASS_UNKNOWN) {
 357                 ACPI_ERROR((AE_INFO, "Unknown opcode %X",
 358                             op->common.aml_opcode));
 359                 return_ACPI_STATUS(AE_NOT_IMPLEMENTED);
 360         }
 361
 362         first_arg = op->common.value.arg;
 363
 364         /* Init the walk state */
 365
 366         walk_state->num_operands = 0;
 367         walk_state->operand_index = 0;
 368         walk_state->return_desc = NULL;
 369         walk_state->result_obj = NULL;
 370
 371         /* Call debugger for single step support (DEBUG build only) */
 372
 373         ACPI_DEBUGGER_EXEC(status =
 374                            acpi_db_single_step(walk_state, op, op_class));
 375         ACPI_DEBUGGER_EXEC(if (ACPI_FAILURE(status)) {
 376                            return_ACPI_STATUS(status);}
 377         ) ;
 378
 379         /* Decode the Opcode Class */
 380
 381         switch (op_class) {
 382         case AML_CLASS_ARGUMENT:        /* Constants, literals, etc. */
 383
 384                 if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
 385                         status = acpi_ds_evaluate_name_path(walk_state);
 386                         if (ACPI_FAILURE(status)) {
 387                                 goto cleanup;
 388                         }
 389                 }
 390                 break;
 391
 392         case AML_CLASS_EXECUTE: /* Most operators with arguments */
 393
 394                 /* Build resolved operand stack */
 395
 396                 status = acpi_ds_create_operands(walk_state, first_arg);
 397                 if (ACPI_FAILURE(status)) {
 398                         goto cleanup;
 399                 }
 400
 401                 /*
 402                  * All opcodes require operand resolution, with the only exceptions
 403                  * being the object_type and size_of operators.
 404                  */
 405                 if (!(walk_state->op_info->flags & AML_NO_OPERAND_RESOLVE)) {
 406
 407                         /* Resolve all operands */
 408
 409                         status = acpi_ex_resolve_operands(walk_state->opcode,
 410                                                           &(walk_state->
 411                                                             operands
 412                                                             [walk_state->
 413                                                              num_operands - 1]),
 414                                                           walk_state);
 415                 }
 416
 417                 if (ACPI_SUCCESS(status)) {
 418                         /*
 419                          * Dispatch the request to the appropriate interpreter handler
 420                          * routine.  There is one routine per opcode "type" based upon the
 421                          * number of opcode arguments and return type.
 422                          */
 423                         status =
 424                             acpi_gbl_op_type_dispatch[op_type] (walk_state);
 425                 } else {
 426                         /*
 427                          * Treat constructs of the form "Store(LocalX,LocalX)" as noops when the
 428                          * Local is uninitialized.
 429                          */
 430                         if ((status == AE_AML_UNINITIALIZED_LOCAL) &&
 431                             (walk_state->opcode == AML_STORE_OP) &&
 432                             (walk_state->operands[0]->common.type ==
 433                              ACPI_TYPE_LOCAL_REFERENCE)
 434                             && (walk_state->operands[1]->common.type ==
 435                                 ACPI_TYPE_LOCAL_REFERENCE)
 436                             && (walk_state->operands[0]->reference.class ==
 437                                 walk_state->operands[1]->reference.class)
 438                             && (walk_state->operands[0]->reference.value ==
 439                                 walk_state->operands[1]->reference.value)) {
 440                                 status = AE_OK;
 441                         } else {
 442                                 ACPI_EXCEPTION((AE_INFO, status,
 443                                                 "While resolving operands for [%s]",
 444                                                 acpi_ps_get_opcode_name
 445                                                 (walk_state->opcode)));
 446                         }
 447                 }
 448
 449                 /* Always delete the argument objects and clear the operand stack */
 450
 451                 acpi_ds_clear_operands(walk_state);
 452
 453                 /*
 454                  * If a result object was returned from above, push it on the
 455                  * current result stack
 456                  */
 457                 if (ACPI_SUCCESS(status) && walk_state->result_obj) {
 458                         status =
 459                             acpi_ds_result_push(walk_state->result_obj,
 460                                                 walk_state);
 461                 }
 462                 break;
 463
 464         default:
 465
 466                 switch (op_type) {
 467                 case AML_TYPE_CONTROL:  /* Type 1 opcode, IF/ELSE/WHILE/NOOP */
 468
 469                         /* 1 Operand, 0 external_result, 0 internal_result */
 470
 471                         status = acpi_ds_exec_end_control_op(walk_state, op);
 472
 473                         break;
 474
 475                 case AML_TYPE_METHOD_CALL:
 476
 477                         /*
 478                          * If the method is referenced from within a package
 479                          * declaration, it is not a invocation of the method, just
 480                          * a reference to it.
 481                          */
 482                         if ((op->asl.parent) &&
 483                             ((op->asl.parent->asl.aml_opcode == AML_PACKAGE_OP)
 484                              || (op->asl.parent->asl.aml_opcode ==
 485                                  AML_VAR_PACKAGE_OP))) {
 486                                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 487                                                   "Method Reference in a Package, Op=%p\n",
 488                                                   op));
 489
 490                                 op->common.node =
 491                                     (struct acpi_namespace_node *)op->asl.value.
 492                                     arg->asl.node;
 493                                 acpi_ut_add_reference(op->asl.value.arg->asl.
 494                                                       node->object);
 495                                 return_ACPI_STATUS(AE_OK);
 496                         }
 497
 498                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 499                                           "Method invocation, Op=%p\n", op));
 500
 501                         /*
 502                          * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains
 503                          * the method Node pointer
 504                          */
 505                         /* next_op points to the op that holds the method name */
 506
 507                         next_op = first_arg;
 508
 509                         /* next_op points to first argument op */
 510
 511                         next_op = next_op->common.next;
 512
 513                         /*
 514                          * Get the method's arguments and put them on the operand stack
 515                          */
 516                         status = acpi_ds_create_operands(walk_state, next_op);
 517                         if (ACPI_FAILURE(status)) {
 518                                 break;
 519                         }
 520
 521                         /*
 522                          * Since the operands will be passed to another control method,
 523                          * we must resolve all local references here (Local variables,
 524                          * arguments to *this* method, etc.)
 525                          */
 526                         status = acpi_ds_resolve_operands(walk_state);
 527                         if (ACPI_FAILURE(status)) {
 528
 529                                 /* On error, clear all resolved operands */
 530
 531                                 acpi_ds_clear_operands(walk_state);
 532                                 break;
 533                         }
 534
 535                         /*
 536                          * Tell the walk loop to preempt this running method and
 537                          * execute the new method
 538                          */
 539                         status = AE_CTRL_TRANSFER;
 540
 541                         /*
 542                          * Return now; we don't want to disturb anything,
 543                          * especially the operand count!
 544                          */
 545                         return_ACPI_STATUS(status);
 546
 547                 case AML_TYPE_CREATE_FIELD:
 548
 549                         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 550                                           "Executing CreateField Buffer/Index Op=%p\n",
 551                                           op));
 552
 553                         status = acpi_ds_load2_end_op(walk_state);
 554                         if (ACPI_FAILURE(status)) {
 555                                 break;
 556                         }
 557
 558                         status =
 559                             acpi_ds_eval_buffer_field_operands(walk_state, op);
 560                         break;
 561
 562                 case AML_TYPE_CREATE_OBJECT:
 563
 564                         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 565                                           "Executing CreateObject (Buffer/Package) Op=%p\n",
 566                                           op));
 567
 568                         switch (op->common.parent->common.aml_opcode) {
 569                         case AML_NAME_OP:
 570
 571                                 /*
 572                                  * Put the Node on the object stack (Contains the ACPI Name
 573                                  * of this object)
 574                                  */
 575                                 walk_state->operands[0] =
 576                                     (void *)op->common.parent->common.node;
 577                                 walk_state->num_operands = 1;
 578
 579                                 status = acpi_ds_create_node(walk_state,
 580                                                              op->common.parent->
 581                                                              common.node,
 582                                                              op->common.parent);
 583                                 if (ACPI_FAILURE(status)) {
 584                                         break;
 585                                 }
 586
 587                                 /* Fall through */
 588                                 /*lint -fallthrough */
 589
 590                         case AML_INT_EVAL_SUBTREE_OP:
 591
 592                                 status =
 593                                     acpi_ds_eval_data_object_operands
 594                                     (walk_state, op,
 595                                      acpi_ns_get_attached_object(op->common.
 596                                                                  parent->common.
 597                                                                  node));
 598                                 break;
 599
 600                         default:
 601
 602                                 status =
 603                                     acpi_ds_eval_data_object_operands
 604                                     (walk_state, op, NULL);
 605                                 break;
 606                         }
 607
 608                         /*
 609                          * If a result object was returned from above, push it on the
 610                          * current result stack
 611                          */
 612                         if (walk_state->result_obj) {
 613                                 status =
 614                                     acpi_ds_result_push(walk_state->result_obj,
 615                                                         walk_state);
 616                         }
 617                         break;
 618
 619                 case AML_TYPE_NAMED_FIELD:
 620                 case AML_TYPE_NAMED_COMPLEX:
 621                 case AML_TYPE_NAMED_SIMPLE:
 622                 case AML_TYPE_NAMED_NO_OBJ:
 623
 624                         status = acpi_ds_load2_end_op(walk_state);
 625                         if (ACPI_FAILURE(status)) {
 626                                 break;
 627                         }
 628
 629                         if (op->common.aml_opcode == AML_REGION_OP) {
 630                                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 631                                                   "Executing OpRegion Address/Length Op=%p\n",
 632                                                   op));
 633
 634                                 status =
 635                                     acpi_ds_eval_region_operands(walk_state,
 636                                                                  op);
 637                                 if (ACPI_FAILURE(status)) {
 638                                         break;
 639                                 }
 640                         } else if (op->common.aml_opcode == AML_DATA_REGION_OP) {
 641                                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 642                                                   "Executing DataTableRegion Strings Op=%p\n",
 643                                                   op));
 644
 645                                 status =
 646                                     acpi_ds_eval_table_region_operands
 647                                     (walk_state, op);
 648                                 if (ACPI_FAILURE(status)) {
 649                                         break;
 650                                 }
 651                         } else if (op->common.aml_opcode == AML_BANK_FIELD_OP) {
 652                                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 653                                                   "Executing BankField Op=%p\n",
 654                                                   op));
 655
 656                                 status =
 657                                     acpi_ds_eval_bank_field_operands(walk_state,
 658                                                                      op);
 659                                 if (ACPI_FAILURE(status)) {
 660                                         break;
 661                                 }
 662                         }
 663                         break;
 664
 665                 case AML_TYPE_UNDEFINED:
 666
 667                         ACPI_ERROR((AE_INFO,
 668                                     "Undefined opcode type Op=%p", op));
 669                         return_ACPI_STATUS(AE_NOT_IMPLEMENTED);
 670
 671                 case AML_TYPE_BOGUS:
 672
 673                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 674                                           "Internal opcode=%X type Op=%p\n",
 675                                           walk_state->opcode, op));
 676                         break;
 677
 678                 default:
 679
 680                         ACPI_ERROR((AE_INFO,
 681                                     "Unimplemented opcode, class=%X type=%X Opcode=%X Op=%p",
 682                                     op_class, op_type, op->common.aml_opcode,
 683                                     op));
 684
 685                         status = AE_NOT_IMPLEMENTED;
 686                         break;
 687                 }
 688         }
 689
 690         /*
 691          * ACPI 2.0 support for 64-bit integers: Truncate numeric
 692          * result value if we are executing from a 32-bit ACPI table
 693          */
 694         acpi_ex_truncate_for32bit_table(walk_state->result_obj);
 695
 696         /*
 697          * Check if we just completed the evaluation of a
 698          * conditional predicate
 699          */
 700         if ((ACPI_SUCCESS(status)) &&
 701             (walk_state->control_state) &&
 702             (walk_state->control_state->common.state ==
 703              ACPI_CONTROL_PREDICATE_EXECUTING) &&
 704             (walk_state->control_state->control.predicate_op == op)) {
 705                 status =
 706                     acpi_ds_get_predicate_value(walk_state,
 707                                                 walk_state->result_obj);
 708                 walk_state->result_obj = NULL;
 709         }
 710
 711       cleanup:
 712
 713         if (walk_state->result_obj) {
 714
 715                 /* Break to debugger to display result */
 716
 717                 ACPI_DEBUGGER_EXEC(acpi_db_display_result_object
 718                                    (walk_state->result_obj, walk_state));
 719
 720                 /*
 721                  * Delete the result op if and only if:
 722                  * Parent will not use the result -- such as any
 723                  * non-nested type2 op in a method (parent will be method)
 724                  */
 725                 acpi_ds_delete_result_if_not_used(op, walk_state->result_obj,
 726                                                   walk_state);
 727         }
 728 #ifdef _UNDER_DEVELOPMENT
 729
 730         if (walk_state->parser_state.aml == walk_state->parser_state.aml_end) {
 731                 acpi_db_method_end(walk_state);
 732         }
 733 #endif
 734
 735         /* Invoke exception handler on error */
 736
 737         if (ACPI_FAILURE(status)) {
 738                 status = acpi_ds_method_error(status, walk_state);
 739         }
 740
 741         /* Always clear the object stack */
 742
 743         walk_state->num_operands = 0;
 744         return_ACPI_STATUS(status);
 745 }