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 - 2017, 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,
 137                                             ACPI_STRTOUL_BASE16);
 138         if (ACPI_FAILURE(status)) {
 139                 goto cleanup;
 140         }
 141
 142         if (local_obj_desc->common.type != ACPI_TYPE_INTEGER) {
 143                 ACPI_ERROR((AE_INFO,
 144                             "Bad predicate (not an integer) ObjDesc=%p State=%p Type=0x%X",
 145                             obj_desc, walk_state, obj_desc->common.type));
 146
 147                 status = AE_AML_OPERAND_TYPE;
 148                 goto cleanup;
 149         }
 150
 151         /* Truncate the predicate to 32-bits if necessary */
 152
 153         (void)acpi_ex_truncate_for32bit_table(local_obj_desc);
 154
 155         /*
 156          * Save the result of the predicate evaluation on
 157          * the control stack
 158          */
 159         if (local_obj_desc->integer.value) {
 160                 walk_state->control_state->common.value = TRUE;
 161         } else {
 162                 /*
 163                  * Predicate is FALSE, we will just toss the
 164                  * rest of the package
 165                  */
 166                 walk_state->control_state->common.value = FALSE;
 167                 status = AE_CTRL_FALSE;
 168         }
 169
 170         /* Predicate can be used for an implicit return value */
 171
 172         (void)acpi_ds_do_implicit_return(local_obj_desc, walk_state, TRUE);
 173
 174 cleanup:
 175
 176         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 177                           "Completed a predicate eval=%X Op=%p\n",
 178                           walk_state->control_state->common.value,
 179                           walk_state->op));
 180
 181         /* Break to debugger to display result */
 182
 183         acpi_db_display_result_object(local_obj_desc, walk_state);
 184
 185         /*
 186          * Delete the predicate result object (we know that
 187          * we don't need it anymore)
 188          */
 189         if (local_obj_desc != obj_desc) {
 190                 acpi_ut_remove_reference(local_obj_desc);
 191         }
 192         acpi_ut_remove_reference(obj_desc);
 193
 194         walk_state->control_state->common.state = ACPI_CONTROL_NORMAL;
 195         return_ACPI_STATUS(status);
 196 }
 197
 198 /*****************************************************************************
 199  *
 200  * FUNCTION:    acpi_ds_exec_begin_op
 201  *
 202  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 203  *              out_op          - Where to return op if a new one is created
 204  *
 205  * RETURN:      Status
 206  *
 207  * DESCRIPTION: Descending callback used during the execution of control
 208  *              methods. This is where most operators and operands are
 209  *              dispatched to the interpreter.
 210  *
 211  ****************************************************************************/
 212
 213 acpi_status
 214 acpi_ds_exec_begin_op(struct acpi_walk_state *walk_state,
 215                       union acpi_parse_object **out_op)
 216 {
 217         union acpi_parse_object *op;
 218         acpi_status status = AE_OK;
 219         u32 opcode_class;
 220
 221         ACPI_FUNCTION_TRACE_PTR(ds_exec_begin_op, walk_state);
 222
 223         op = walk_state->op;
 224         if (!op) {
 225                 status = acpi_ds_load2_begin_op(walk_state, out_op);
 226                 if (ACPI_FAILURE(status)) {
 227                         goto error_exit;
 228                 }
 229
 230                 op = *out_op;
 231                 walk_state->op = op;
 232                 walk_state->opcode = op->common.aml_opcode;
 233                 walk_state->op_info =
 234                     acpi_ps_get_opcode_info(op->common.aml_opcode);
 235
 236                 if (acpi_ns_opens_scope(walk_state->op_info->object_type)) {
 237                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 238                                           "(%s) Popping scope for Op %p\n",
 239                                           acpi_ut_get_type_name(walk_state->
 240                                                                 op_info->
 241                                                                 object_type),
 242                                           op));
 243
 244                         status = acpi_ds_scope_stack_pop(walk_state);
 245                         if (ACPI_FAILURE(status)) {
 246                                 goto error_exit;
 247                         }
 248                 }
 249         }
 250
 251         if (op == walk_state->origin) {
 252                 if (out_op) {
 253                         *out_op = op;
 254                 }
 255
 256                 return_ACPI_STATUS(AE_OK);
 257         }
 258
 259         /*
 260          * If the previous opcode was a conditional, this opcode
 261          * must be the beginning of the associated predicate.
 262          * Save this knowledge in the current scope descriptor
 263          */
 264         if ((walk_state->control_state) &&
 265             (walk_state->control_state->common.state ==
 266              ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
 267                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 268                                   "Exec predicate Op=%p State=%p\n",
 269                                   op, walk_state));
 270
 271                 walk_state->control_state->common.state =
 272                     ACPI_CONTROL_PREDICATE_EXECUTING;
 273
 274                 /* Save start of predicate */
 275
 276                 walk_state->control_state->control.predicate_op = op;
 277         }
 278
 279         opcode_class = walk_state->op_info->class;
 280
 281         /* We want to send namepaths to the load code */
 282
 283         if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
 284                 opcode_class = AML_CLASS_NAMED_OBJECT;
 285         }
 286
 287         /*
 288          * Handle the opcode based upon the opcode type
 289          */
 290         switch (opcode_class) {
 291         case AML_CLASS_CONTROL:
 292
 293                 status = acpi_ds_exec_begin_control_op(walk_state, op);
 294                 break;
 295
 296         case AML_CLASS_NAMED_OBJECT:
 297
 298                 if (walk_state->walk_type & ACPI_WALK_METHOD) {
 299                         /*
 300                          * Found a named object declaration during method execution;
 301                          * we must enter this object into the namespace. The created
 302                          * object is temporary and will be deleted upon completion of
 303                          * the execution of this method.
 304                          *
 305                          * Note 10/2010: Except for the Scope() op. This opcode does
 306                          * not actually create a new object, it refers to an existing
 307                          * object. However, for Scope(), we want to indeed open a
 308                          * new scope.
 309                          */
 310                         if (op->common.aml_opcode != AML_SCOPE_OP) {
 311                                 status =
 312                                     acpi_ds_load2_begin_op(walk_state, NULL);
 313                         } else {
 314                                 status =
 315                                     acpi_ds_scope_stack_push(op->named.node,
 316                                                              op->named.node->
 317                                                              type, walk_state);
 318                                 if (ACPI_FAILURE(status)) {
 319                                         return_ACPI_STATUS(status);
 320                                 }
 321                         }
 322                 }
 323                 break;
 324
 325         case AML_CLASS_EXECUTE:
 326         case AML_CLASS_CREATE:
 327
 328                 break;
 329
 330         default:
 331
 332                 break;
 333         }
 334
 335         /* Nothing to do here during method execution */
 336
 337         return_ACPI_STATUS(status);
 338
 339 error_exit:
 340         status = acpi_ds_method_error(status, walk_state);
 341         return_ACPI_STATUS(status);
 342 }
 343
 344 /*****************************************************************************
 345  *
 346  * FUNCTION:    acpi_ds_exec_end_op
 347  *
 348  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 349  *
 350  * RETURN:      Status
 351  *
 352  * DESCRIPTION: Ascending callback used during the execution of control
 353  *              methods. The only thing we really need to do here is to
 354  *              notice the beginning of IF, ELSE, and WHILE blocks.
 355  *
 356  ****************************************************************************/
 357
 358 acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state)
 359 {
 360         union acpi_parse_object *op;
 361         acpi_status status = AE_OK;
 362         u32 op_type;
 363         u32 op_class;
 364         union acpi_parse_object *next_op;
 365         union acpi_parse_object *first_arg;
 366
 367         ACPI_FUNCTION_TRACE_PTR(ds_exec_end_op, walk_state);
 368
 369         op = walk_state->op;
 370         op_type = walk_state->op_info->type;
 371         op_class = walk_state->op_info->class;
 372
 373         if (op_class == AML_CLASS_UNKNOWN) {
 374                 ACPI_ERROR((AE_INFO, "Unknown opcode 0x%X",
 375                             op->common.aml_opcode));
 376                 return_ACPI_STATUS(AE_NOT_IMPLEMENTED);
 377         }
 378
 379         first_arg = op->common.value.arg;
 380
 381         /* Init the walk state */
 382
 383         walk_state->num_operands = 0;
 384         walk_state->operand_index = 0;
 385         walk_state->return_desc = NULL;
 386         walk_state->result_obj = NULL;
 387
 388         /* Call debugger for single step support (DEBUG build only) */
 389
 390         status = acpi_db_single_step(walk_state, op, op_class);
 391         if (ACPI_FAILURE(status)) {
 392                 return_ACPI_STATUS(status);
 393         }
 394
 395         /* Decode the Opcode Class */
 396
 397         switch (op_class) {
 398         case AML_CLASS_ARGUMENT:        /* Constants, literals, etc. */
 399
 400                 if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
 401                         status = acpi_ds_evaluate_name_path(walk_state);
 402                         if (ACPI_FAILURE(status)) {
 403                                 goto cleanup;
 404                         }
 405                 }
 406                 break;
 407
 408         case AML_CLASS_EXECUTE: /* Most operators with arguments */
 409
 410                 /* Build resolved operand stack */
 411
 412                 status = acpi_ds_create_operands(walk_state, first_arg);
 413                 if (ACPI_FAILURE(status)) {
 414                         goto cleanup;
 415                 }
 416
 417                 /*
 418                  * All opcodes require operand resolution, with the only exceptions
 419                  * being the object_type and size_of operators.
 420                  */
 421                 if (!(walk_state->op_info->flags & AML_NO_OPERAND_RESOLVE)) {
 422
 423                         /* Resolve all operands */
 424
 425                         status = acpi_ex_resolve_operands(walk_state->opcode,
 426                                                           &(walk_state->
 427                                                             operands
 428                                                             [walk_state->
 429                                                              num_operands - 1]),
 430                                                           walk_state);
 431                 }
 432
 433                 if (ACPI_SUCCESS(status)) {
 434                         /*
 435                          * Dispatch the request to the appropriate interpreter handler
 436                          * routine. There is one routine per opcode "type" based upon the
 437                          * number of opcode arguments and return type.
 438                          */
 439                         status =
 440                             acpi_gbl_op_type_dispatch[op_type] (walk_state);
 441                 } else {
 442                         /*
 443                          * Treat constructs of the form "Store(LocalX,LocalX)" as noops when the
 444                          * Local is uninitialized.
 445                          */
 446                         if ((status == AE_AML_UNINITIALIZED_LOCAL) &&
 447                             (walk_state->opcode == AML_STORE_OP) &&
 448                             (walk_state->operands[0]->common.type ==
 449                              ACPI_TYPE_LOCAL_REFERENCE)
 450                             && (walk_state->operands[1]->common.type ==
 451                                 ACPI_TYPE_LOCAL_REFERENCE)
 452                             && (walk_state->operands[0]->reference.class ==
 453                                 walk_state->operands[1]->reference.class)
 454                             && (walk_state->operands[0]->reference.value ==
 455                                 walk_state->operands[1]->reference.value)) {
 456                                 status = AE_OK;
 457                         } else {
 458                                 ACPI_EXCEPTION((AE_INFO, status,
 459                                                 "While resolving operands for [%s]",
 460                                                 acpi_ps_get_opcode_name
 461                                                 (walk_state->opcode)));
 462                         }
 463                 }
 464
 465                 /* Always delete the argument objects and clear the operand stack */
 466
 467                 acpi_ds_clear_operands(walk_state);
 468
 469                 /*
 470                  * If a result object was returned from above, push it on the
 471                  * current result stack
 472                  */
 473                 if (ACPI_SUCCESS(status) && walk_state->result_obj) {
 474                         status =
 475                             acpi_ds_result_push(walk_state->result_obj,
 476                                                 walk_state);
 477                 }
 478                 break;
 479
 480         default:
 481
 482                 switch (op_type) {
 483                 case AML_TYPE_CONTROL:  /* Type 1 opcode, IF/ELSE/WHILE/NOOP */
 484
 485                         /* 1 Operand, 0 external_result, 0 internal_result */
 486
 487                         status = acpi_ds_exec_end_control_op(walk_state, op);
 488
 489                         break;
 490
 491                 case AML_TYPE_METHOD_CALL:
 492                         /*
 493                          * If the method is referenced from within a package
 494                          * declaration, it is not a invocation of the method, just
 495                          * a reference to it.
 496                          */
 497                         if ((op->asl.parent) &&
 498                             ((op->asl.parent->asl.aml_opcode == AML_PACKAGE_OP)
 499                              || (op->asl.parent->asl.aml_opcode ==
 500                                  AML_VAR_PACKAGE_OP))) {
 501                                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 502                                                   "Method Reference in a Package, Op=%p\n",
 503                                                   op));
 504
 505                                 op->common.node = (struct acpi_namespace_node *)
 506                                     op->asl.value.arg->asl.node;
 507                                 acpi_ut_add_reference(op->asl.value.arg->asl.
 508                                                       node->object);
 509                                 return_ACPI_STATUS(AE_OK);
 510                         }
 511
 512                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 513                                           "Method invocation, Op=%p\n", op));
 514
 515                         /*
 516                          * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains
 517                          * the method Node pointer
 518                          */
 519                         /* next_op points to the op that holds the method name */
 520
 521                         next_op = first_arg;
 522
 523                         /* next_op points to first argument op */
 524
 525                         next_op = next_op->common.next;
 526
 527                         /*
 528                          * Get the method's arguments and put them on the operand stack
 529                          */
 530                         status = acpi_ds_create_operands(walk_state, next_op);
 531                         if (ACPI_FAILURE(status)) {
 532                                 break;
 533                         }
 534
 535                         /*
 536                          * Since the operands will be passed to another control method,
 537                          * we must resolve all local references here (Local variables,
 538                          * arguments to *this* method, etc.)
 539                          */
 540                         status = acpi_ds_resolve_operands(walk_state);
 541                         if (ACPI_FAILURE(status)) {
 542
 543                                 /* On error, clear all resolved operands */
 544
 545                                 acpi_ds_clear_operands(walk_state);
 546                                 break;
 547                         }
 548
 549                         /*
 550                          * Tell the walk loop to preempt this running method and
 551                          * execute the new method
 552                          */
 553                         status = AE_CTRL_TRANSFER;
 554
 555                         /*
 556                          * Return now; we don't want to disturb anything,
 557                          * especially the operand count!
 558                          */
 559                         return_ACPI_STATUS(status);
 560
 561                 case AML_TYPE_CREATE_FIELD:
 562
 563                         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 564                                           "Executing CreateField Buffer/Index Op=%p\n",
 565                                           op));
 566
 567                         status = acpi_ds_load2_end_op(walk_state);
 568                         if (ACPI_FAILURE(status)) {
 569                                 break;
 570                         }
 571
 572                         status =
 573                             acpi_ds_eval_buffer_field_operands(walk_state, op);
 574                         break;
 575
 576                 case AML_TYPE_CREATE_OBJECT:
 577
 578                         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 579                                           "Executing CreateObject (Buffer/Package) Op=%p\n",
 580                                           op));
 581
 582                         switch (op->common.parent->common.aml_opcode) {
 583                         case AML_NAME_OP:
 584                                 /*
 585                                  * Put the Node on the object stack (Contains the ACPI Name
 586                                  * of this object)
 587                                  */
 588                                 walk_state->operands[0] = (void *)
 589                                     op->common.parent->common.node;
 590                                 walk_state->num_operands = 1;
 591
 592                                 status = acpi_ds_create_node(walk_state,
 593                                                              op->common.parent->
 594                                                              common.node,
 595                                                              op->common.parent);
 596                                 if (ACPI_FAILURE(status)) {
 597                                         break;
 598                                 }
 599
 600                                 /* Fall through */
 601                                 /*lint -fallthrough */
 602
 603                         case AML_INT_EVAL_SUBTREE_OP:
 604
 605                                 status =
 606                                     acpi_ds_eval_data_object_operands
 607                                     (walk_state, op,
 608                                      acpi_ns_get_attached_object(op->common.
 609                                                                  parent->common.
 610                                                                  node));
 611                                 break;
 612
 613                         default:
 614
 615                                 status =
 616                                     acpi_ds_eval_data_object_operands
 617                                     (walk_state, op, NULL);
 618                                 break;
 619                         }
 620
 621                         /*
 622                          * If a result object was returned from above, push it on the
 623                          * current result stack
 624                          */
 625                         if (walk_state->result_obj) {
 626                                 status =
 627                                     acpi_ds_result_push(walk_state->result_obj,
 628                                                         walk_state);
 629                         }
 630                         break;
 631
 632                 case AML_TYPE_NAMED_FIELD:
 633                 case AML_TYPE_NAMED_COMPLEX:
 634                 case AML_TYPE_NAMED_SIMPLE:
 635                 case AML_TYPE_NAMED_NO_OBJ:
 636
 637                         status = acpi_ds_load2_end_op(walk_state);
 638                         if (ACPI_FAILURE(status)) {
 639                                 break;
 640                         }
 641
 642                         if (op->common.aml_opcode == AML_REGION_OP) {
 643                                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 644                                                   "Executing OpRegion Address/Length Op=%p\n",
 645                                                   op));
 646
 647                                 status =
 648                                     acpi_ds_eval_region_operands(walk_state,
 649                                                                  op);
 650                                 if (ACPI_FAILURE(status)) {
 651                                         break;
 652                                 }
 653                         } else if (op->common.aml_opcode == AML_DATA_REGION_OP) {
 654                                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 655                                                   "Executing DataTableRegion Strings Op=%p\n",
 656                                                   op));
 657
 658                                 status =
 659                                     acpi_ds_eval_table_region_operands
 660                                     (walk_state, op);
 661                                 if (ACPI_FAILURE(status)) {
 662                                         break;
 663                                 }
 664                         } else if (op->common.aml_opcode == AML_BANK_FIELD_OP) {
 665                                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 666                                                   "Executing BankField Op=%p\n",
 667                                                   op));
 668
 669                                 status =
 670                                     acpi_ds_eval_bank_field_operands(walk_state,
 671                                                                      op);
 672                                 if (ACPI_FAILURE(status)) {
 673                                         break;
 674                                 }
 675                         }
 676                         break;
 677
 678                 case AML_TYPE_UNDEFINED:
 679
 680                         ACPI_ERROR((AE_INFO,
 681                                     "Undefined opcode type Op=%p", op));
 682                         return_ACPI_STATUS(AE_NOT_IMPLEMENTED);
 683
 684                 case AML_TYPE_BOGUS:
 685
 686                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 687                                           "Internal opcode=%X type Op=%p\n",
 688                                           walk_state->opcode, op));
 689                         break;
 690
 691                 default:
 692
 693                         ACPI_ERROR((AE_INFO,
 694                                     "Unimplemented opcode, class=0x%X "
 695                                     "type=0x%X Opcode=0x%X Op=%p",
 696                                     op_class, op_type, op->common.aml_opcode,
 697                                     op));
 698
 699                         status = AE_NOT_IMPLEMENTED;
 700                         break;
 701                 }
 702         }
 703
 704         /*
 705          * ACPI 2.0 support for 64-bit integers: Truncate numeric
 706          * result value if we are executing from a 32-bit ACPI table
 707          */
 708         (void)acpi_ex_truncate_for32bit_table(walk_state->result_obj);
 709
 710         /*
 711          * Check if we just completed the evaluation of a
 712          * conditional predicate
 713          */
 714         if ((ACPI_SUCCESS(status)) &&
 715             (walk_state->control_state) &&
 716             (walk_state->control_state->common.state ==
 717              ACPI_CONTROL_PREDICATE_EXECUTING) &&
 718             (walk_state->control_state->control.predicate_op == op)) {
 719                 status =
 720                     acpi_ds_get_predicate_value(walk_state,
 721                                                 walk_state->result_obj);
 722                 walk_state->result_obj = NULL;
 723         }
 724
 725 cleanup:
 726
 727         if (walk_state->result_obj) {
 728
 729                 /* Break to debugger to display result */
 730
 731                 acpi_db_display_result_object(walk_state->result_obj,
 732                                               walk_state);
 733
 734                 /*
 735                  * Delete the result op if and only if:
 736                  * Parent will not use the result -- such as any
 737                  * non-nested type2 op in a method (parent will be method)
 738                  */
 739                 acpi_ds_delete_result_if_not_used(op, walk_state->result_obj,
 740                                                   walk_state);
 741         }
 742 #ifdef _UNDER_DEVELOPMENT
 743
 744         if (walk_state->parser_state.aml == walk_state->parser_state.aml_end) {
 745                 acpi_db_method_end(walk_state);
 746         }
 747 #endif
 748
 749         /* Invoke exception handler on error */
 750
 751         if (ACPI_FAILURE(status)) {
 752                 status = acpi_ds_method_error(status, walk_state);
 753         }
 754
 755         /* Always clear the object stack */
 756
 757         walk_state->num_operands = 0;
 758         return_ACPI_STATUS(status);
 759 }