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 - 2008, 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 <acpi/accommon.h>
  47 #include <acpi/acparser.h>
  48 #include <acpi/amlcode.h>
  49 #include <acpi/acdispat.h>
  50 #include <acpi/acinterp.h>
  51 #include <acpi/acnamesp.h>
  52 #include <acpi/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 (ACPI_GET_OBJECT_TYPE(local_obj_desc) != 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,
 145                             ACPI_GET_OBJECT_TYPE(obj_desc)));
 146
 147                 status = AE_AML_OPERAND_TYPE;
 148                 goto cleanup;
 149         }
 150
 151         /* Truncate the predicate to 32-bits if necessary */
 152
 153         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, "Completed a predicate eval=%X Op=%p\n",
 177                           walk_state->control_state->common.value,
 178                           walk_state->op));
 179
 180         /* Break to debugger to display result */
 181
 182         ACPI_DEBUGGER_EXEC(acpi_db_display_result_object
 183                            (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", op,
 269                                   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                         status = acpi_ds_load2_begin_op(walk_state, NULL);
 306                 }
 307
 308                 break;
 309
 310         case AML_CLASS_EXECUTE:
 311         case AML_CLASS_CREATE:
 312
 313                 break;
 314
 315         default:
 316                 break;
 317         }
 318
 319         /* Nothing to do here during method execution */
 320
 321         return_ACPI_STATUS(status);
 322
 323       error_exit:
 324         status = acpi_ds_method_error(status, walk_state);
 325         return_ACPI_STATUS(status);
 326 }
 327
 328 /*****************************************************************************
 329  *
 330  * FUNCTION:    acpi_ds_exec_end_op
 331  *
 332  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 333  *
 334  * RETURN:      Status
 335  *
 336  * DESCRIPTION: Ascending callback used during the execution of control
 337  *              methods.  The only thing we really need to do here is to
 338  *              notice the beginning of IF, ELSE, and WHILE blocks.
 339  *
 340  ****************************************************************************/
 341
 342 acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state)
 343 {
 344         union acpi_parse_object *op;
 345         acpi_status status = AE_OK;
 346         u32 op_type;
 347         u32 op_class;
 348         union acpi_parse_object *next_op;
 349         union acpi_parse_object *first_arg;
 350
 351         ACPI_FUNCTION_TRACE_PTR(ds_exec_end_op, walk_state);
 352
 353         op = walk_state->op;
 354         op_type = walk_state->op_info->type;
 355         op_class = walk_state->op_info->class;
 356
 357         if (op_class == AML_CLASS_UNKNOWN) {
 358                 ACPI_ERROR((AE_INFO, "Unknown opcode %X",
 359                             op->common.aml_opcode));
 360                 return_ACPI_STATUS(AE_NOT_IMPLEMENTED);
 361         }
 362
 363         first_arg = op->common.value.arg;
 364
 365         /* Init the walk state */
 366
 367         walk_state->num_operands = 0;
 368         walk_state->operand_index = 0;
 369         walk_state->return_desc = NULL;
 370         walk_state->result_obj = NULL;
 371
 372         /* Call debugger for single step support (DEBUG build only) */
 373
 374         ACPI_DEBUGGER_EXEC(status =
 375                            acpi_db_single_step(walk_state, op, op_class));
 376         ACPI_DEBUGGER_EXEC(if (ACPI_FAILURE(status)) {
 377                            return_ACPI_STATUS(status);}
 378         ) ;
 379
 380         /* Decode the Opcode Class */
 381
 382         switch (op_class) {
 383         case AML_CLASS_ARGUMENT:        /* Constants, literals, etc. */
 384
 385                 if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
 386                         status = acpi_ds_evaluate_name_path(walk_state);
 387                         if (ACPI_FAILURE(status)) {
 388                                 goto cleanup;
 389                         }
 390                 }
 391                 break;
 392
 393         case AML_CLASS_EXECUTE: /* Most operators with arguments */
 394
 395                 /* Build resolved operand stack */
 396
 397                 status = acpi_ds_create_operands(walk_state, first_arg);
 398                 if (ACPI_FAILURE(status)) {
 399                         goto cleanup;
 400                 }
 401
 402                 /*
 403                  * All opcodes require operand resolution, with the only exceptions
 404                  * being the object_type and size_of operators.
 405                  */
 406                 if (!(walk_state->op_info->flags & AML_NO_OPERAND_RESOLVE)) {
 407
 408                         /* Resolve all operands */
 409
 410                         status = acpi_ex_resolve_operands(walk_state->opcode,
 411                                                           &(walk_state->
 412                                                             operands
 413                                                             [walk_state->
 414                                                              num_operands - 1]),
 415                                                           walk_state);
 416                 }
 417
 418                 if (ACPI_SUCCESS(status)) {
 419                         /*
 420                          * Dispatch the request to the appropriate interpreter handler
 421                          * routine.  There is one routine per opcode "type" based upon the
 422                          * number of opcode arguments and return type.
 423                          */
 424                         status =
 425                             acpi_gbl_op_type_dispatch[op_type] (walk_state);
 426                 } else {
 427                         /*
 428                          * Treat constructs of the form "Store(LocalX,LocalX)" as noops when the
 429                          * Local is uninitialized.
 430                          */
 431                         if ((status == AE_AML_UNINITIALIZED_LOCAL) &&
 432                             (walk_state->opcode == AML_STORE_OP) &&
 433                             (walk_state->operands[0]->common.type ==
 434                              ACPI_TYPE_LOCAL_REFERENCE)
 435                             && (walk_state->operands[1]->common.type ==
 436                                 ACPI_TYPE_LOCAL_REFERENCE)
 437                             && (walk_state->operands[0]->reference.class ==
 438                                 walk_state->operands[1]->reference.class)
 439                             && (walk_state->operands[0]->reference.value ==
 440                                 walk_state->operands[1]->reference.value)) {
 441                                 status = AE_OK;
 442                         } else {
 443                                 ACPI_EXCEPTION((AE_INFO, status,
 444                                                 "While resolving operands for [%s]",
 445                                                 acpi_ps_get_opcode_name
 446                                                 (walk_state->opcode)));
 447                         }
 448                 }
 449
 450                 /* Always delete the argument objects and clear the operand stack */
 451
 452                 acpi_ds_clear_operands(walk_state);
 453
 454                 /*
 455                  * If a result object was returned from above, push it on the
 456                  * current result stack
 457                  */
 458                 if (ACPI_SUCCESS(status) && walk_state->result_obj) {
 459                         status =
 460                             acpi_ds_result_push(walk_state->result_obj,
 461                                                 walk_state);
 462                 }
 463                 break;
 464
 465         default:
 466
 467                 switch (op_type) {
 468                 case AML_TYPE_CONTROL:  /* Type 1 opcode, IF/ELSE/WHILE/NOOP */
 469
 470                         /* 1 Operand, 0 external_result, 0 internal_result */
 471
 472                         status = acpi_ds_exec_end_control_op(walk_state, op);
 473
 474                         break;
 475
 476                 case AML_TYPE_METHOD_CALL:
 477
 478                         /*
 479                          * If the method is referenced from within a package
 480                          * declaration, it is not a invocation of the method, just
 481                          * a reference to it.
 482                          */
 483                         if ((op->asl.parent) &&
 484                             ((op->asl.parent->asl.aml_opcode == AML_PACKAGE_OP)
 485                              || (op->asl.parent->asl.aml_opcode ==
 486                                  AML_VAR_PACKAGE_OP))) {
 487                                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 488                                                   "Method Reference in a Package, Op=%p\n",
 489                                                   op));
 490
 491                                 op->common.node =
 492                                     (struct acpi_namespace_node *)op->asl.value.
 493                                     arg->asl.node;
 494                                 acpi_ut_add_reference(op->asl.value.arg->asl.
 495                                                       node->object);
 496                                 return_ACPI_STATUS(AE_OK);
 497                         }
 498
 499                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 500                                           "Method invocation, Op=%p\n", op));
 501
 502                         /*
 503                          * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains
 504                          * the method Node pointer
 505                          */
 506                         /* next_op points to the op that holds the method name */
 507
 508                         next_op = first_arg;
 509
 510                         /* next_op points to first argument op */
 511
 512                         next_op = next_op->common.next;
 513
 514                         /*
 515                          * Get the method's arguments and put them on the operand stack
 516                          */
 517                         status = acpi_ds_create_operands(walk_state, next_op);
 518                         if (ACPI_FAILURE(status)) {
 519                                 break;
 520                         }
 521
 522                         /*
 523                          * Since the operands will be passed to another control method,
 524                          * we must resolve all local references here (Local variables,
 525                          * arguments to *this* method, etc.)
 526                          */
 527                         status = acpi_ds_resolve_operands(walk_state);
 528                         if (ACPI_FAILURE(status)) {
 529
 530                                 /* On error, clear all resolved operands */
 531
 532                                 acpi_ds_clear_operands(walk_state);
 533                                 break;
 534                         }
 535
 536                         /*
 537                          * Tell the walk loop to preempt this running method and
 538                          * execute the new method
 539                          */
 540                         status = AE_CTRL_TRANSFER;
 541
 542                         /*
 543                          * Return now; we don't want to disturb anything,
 544                          * especially the operand count!
 545                          */
 546                         return_ACPI_STATUS(status);
 547
 548                 case AML_TYPE_CREATE_FIELD:
 549
 550                         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 551                                           "Executing CreateField Buffer/Index Op=%p\n",
 552                                           op));
 553
 554                         status = acpi_ds_load2_end_op(walk_state);
 555                         if (ACPI_FAILURE(status)) {
 556                                 break;
 557                         }
 558
 559                         status =
 560                             acpi_ds_eval_buffer_field_operands(walk_state, op);
 561                         break;
 562
 563                 case AML_TYPE_CREATE_OBJECT:
 564
 565                         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 566                                           "Executing CreateObject (Buffer/Package) Op=%p\n",
 567                                           op));
 568
 569                         switch (op->common.parent->common.aml_opcode) {
 570                         case AML_NAME_OP:
 571
 572                                 /*
 573                                  * Put the Node on the object stack (Contains the ACPI Name
 574                                  * of this object)
 575                                  */
 576                                 walk_state->operands[0] =
 577                                     (void *)op->common.parent->common.node;
 578                                 walk_state->num_operands = 1;
 579
 580                                 status = acpi_ds_create_node(walk_state,
 581                                                              op->common.parent->
 582                                                              common.node,
 583                                                              op->common.parent);
 584                                 if (ACPI_FAILURE(status)) {
 585                                         break;
 586                                 }
 587
 588                                 /* Fall through */
 589                                 /*lint -fallthrough */
 590
 591                         case AML_INT_EVAL_SUBTREE_OP:
 592
 593                                 status =
 594                                     acpi_ds_eval_data_object_operands
 595                                     (walk_state, op,
 596                                      acpi_ns_get_attached_object(op->common.
 597                                                                  parent->common.
 598                                                                  node));
 599                                 break;
 600
 601                         default:
 602
 603                                 status =
 604                                     acpi_ds_eval_data_object_operands
 605                                     (walk_state, op, NULL);
 606                                 break;
 607                         }
 608
 609                         /*
 610                          * If a result object was returned from above, push it on the
 611                          * current result stack
 612                          */
 613                         if (walk_state->result_obj) {
 614                                 status =
 615                                     acpi_ds_result_push(walk_state->result_obj,
 616                                                         walk_state);
 617                         }
 618                         break;
 619
 620                 case AML_TYPE_NAMED_FIELD:
 621                 case AML_TYPE_NAMED_COMPLEX:
 622                 case AML_TYPE_NAMED_SIMPLE:
 623                 case AML_TYPE_NAMED_NO_OBJ:
 624
 625                         status = acpi_ds_load2_end_op(walk_state);
 626                         if (ACPI_FAILURE(status)) {
 627                                 break;
 628                         }
 629
 630                         if (op->common.aml_opcode == AML_REGION_OP) {
 631                                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 632                                                   "Executing OpRegion Address/Length Op=%p\n",
 633                                                   op));
 634
 635                                 status =
 636                                     acpi_ds_eval_region_operands(walk_state,
 637                                                                  op);
 638                                 if (ACPI_FAILURE(status)) {
 639                                         break;
 640                                 }
 641                         } else if (op->common.aml_opcode == AML_DATA_REGION_OP) {
 642                                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 643                                                   "Executing DataTableRegion Strings Op=%p\n",
 644                                                   op));
 645
 646                                 status =
 647                                     acpi_ds_eval_table_region_operands
 648                                     (walk_state, op);
 649                                 if (ACPI_FAILURE(status)) {
 650                                         break;
 651                                 }
 652                         } else if (op->common.aml_opcode == AML_BANK_FIELD_OP) {
 653                                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 654                                                   "Executing BankField Op=%p\n",
 655                                                   op));
 656
 657                                 status =
 658                                     acpi_ds_eval_bank_field_operands(walk_state,
 659                                                                      op);
 660                                 if (ACPI_FAILURE(status)) {
 661                                         break;
 662                                 }
 663                         }
 664                         break;
 665
 666                 case AML_TYPE_UNDEFINED:
 667
 668                         ACPI_ERROR((AE_INFO,
 669                                     "Undefined opcode type Op=%p", op));
 670                         return_ACPI_STATUS(AE_NOT_IMPLEMENTED);
 671
 672                 case AML_TYPE_BOGUS:
 673
 674                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 675                                           "Internal opcode=%X type Op=%p\n",
 676                                           walk_state->opcode, op));
 677                         break;
 678
 679                 default:
 680
 681                         ACPI_ERROR((AE_INFO,
 682                                     "Unimplemented opcode, class=%X type=%X Opcode=%X Op=%p",
 683                                     op_class, op_type, op->common.aml_opcode,
 684                                     op));
 685
 686                         status = AE_NOT_IMPLEMENTED;
 687                         break;
 688                 }
 689         }
 690
 691         /*
 692          * ACPI 2.0 support for 64-bit integers: Truncate numeric
 693          * result value if we are executing from a 32-bit ACPI table
 694          */
 695         acpi_ex_truncate_for32bit_table(walk_state->result_obj);
 696
 697         /*
 698          * Check if we just completed the evaluation of a
 699          * conditional predicate
 700          */
 701         if ((ACPI_SUCCESS(status)) &&
 702             (walk_state->control_state) &&
 703             (walk_state->control_state->common.state ==
 704              ACPI_CONTROL_PREDICATE_EXECUTING) &&
 705             (walk_state->control_state->control.predicate_op == op)) {
 706                 status =
 707                     acpi_ds_get_predicate_value(walk_state,
 708                                                 walk_state->result_obj);
 709                 walk_state->result_obj = NULL;
 710         }
 711
 712       cleanup:
 713
 714         if (walk_state->result_obj) {
 715
 716                 /* Break to debugger to display result */
 717
 718                 ACPI_DEBUGGER_EXEC(acpi_db_display_result_object
 719                                    (walk_state->result_obj, walk_state));
 720
 721                 /*
 722                  * Delete the result op if and only if:
 723                  * Parent will not use the result -- such as any
 724                  * non-nested type2 op in a method (parent will be method)
 725                  */
 726                 acpi_ds_delete_result_if_not_used(op, walk_state->result_obj,
 727                                                   walk_state);
 728         }
 729 #ifdef _UNDER_DEVELOPMENT
 730
 731         if (walk_state->parser_state.aml == walk_state->parser_state.aml_end) {
 732                 acpi_db_method_end(walk_state);
 733         }
 734 #endif
 735
 736         /* Invoke exception handler on error */
 737
 738         if (ACPI_FAILURE(status)) {
 739                 status = acpi_ds_method_error(status, walk_state);
 740         }
 741
 742         /* Always clear the object stack */
 743
 744         walk_state->num_operands = 0;
 745         return_ACPI_STATUS(status);
 746 }