drivers/acpi/dispatcher/dswexec.c

   1 /******************************************************************************
   2  *
   3  * Module Name: dswexec - Dispatcher method execution callbacks;
   4  *                        dispatch to interpreter.
   5  *
   6  *****************************************************************************/
   7
   8 /*
   9  * Copyright (C) 2000 - 2005, R. Byron Moore
  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/acparser.h>
  47 #include <acpi/amlcode.h>
  48 #include <acpi/acdispat.h>
  49 #include <acpi/acinterp.h>
  50 #include <acpi/acnamesp.h>
  51 #include <acpi/acdebug.h>
  52 #include <acpi/acdisasm.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_DEBUG_PRINT((ACPI_DB_ERROR,
 104                                           "Could not get result from predicate evaluation, %s\n",
 105                                           acpi_format_exception(status)));
 106
 107                         return_ACPI_STATUS(status);
 108                 }
 109         } else {
 110                 status = acpi_ds_create_operand(walk_state, walk_state->op, 0);
 111                 if (ACPI_FAILURE(status)) {
 112                         return_ACPI_STATUS(status);
 113                 }
 114
 115                 status =
 116                     acpi_ex_resolve_to_value(&walk_state->operands[0],
 117                                              walk_state);
 118                 if (ACPI_FAILURE(status)) {
 119                         return_ACPI_STATUS(status);
 120                 }
 121
 122                 obj_desc = walk_state->operands[0];
 123         }
 124
 125         if (!obj_desc) {
 126                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
 127                                   "No predicate obj_desc=%p State=%p\n",
 128                                   obj_desc, walk_state));
 129
 130                 return_ACPI_STATUS(AE_AML_NO_OPERAND);
 131         }
 132
 133         /*
 134          * Result of predicate evaluation must be an Integer
 135          * object. Implicitly convert the argument if necessary.
 136          */
 137         status = acpi_ex_convert_to_integer(obj_desc, &local_obj_desc, 16);
 138         if (ACPI_FAILURE(status)) {
 139                 goto cleanup;
 140         }
 141
 142         if (ACPI_GET_OBJECT_TYPE(local_obj_desc) != ACPI_TYPE_INTEGER) {
 143                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
 144                                   "Bad predicate (not an integer) obj_desc=%p State=%p Type=%X\n",
 145                                   obj_desc, walk_state,
 146                                   ACPI_GET_OBJECT_TYPE(obj_desc)));
 147
 148                 status = AE_AML_OPERAND_TYPE;
 149                 goto cleanup;
 150         }
 151
 152         /* Truncate the predicate to 32-bits if necessary */
 153
 154         acpi_ex_truncate_for32bit_table(local_obj_desc);
 155
 156         /*
 157          * Save the result of the predicate evaluation on
 158          * the control stack
 159          */
 160         if (local_obj_desc->integer.value) {
 161                 walk_state->control_state->common.value = TRUE;
 162         } else {
 163                 /*
 164                  * Predicate is FALSE, we will just toss the
 165                  * rest of the package
 166                  */
 167                 walk_state->control_state->common.value = FALSE;
 168                 status = AE_CTRL_FALSE;
 169         }
 170
 171       cleanup:
 172
 173         ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Completed a predicate eval=%X Op=%p\n",
 174                           walk_state->control_state->common.value,
 175                           walk_state->op));
 176
 177         /* Break to debugger to display result */
 178
 179         ACPI_DEBUGGER_EXEC(acpi_db_display_result_object
 180                            (local_obj_desc, walk_state));
 181
 182         /*
 183          * Delete the predicate result object (we know that
 184          * we don't need it anymore)
 185          */
 186         if (local_obj_desc != obj_desc) {
 187                 acpi_ut_remove_reference(local_obj_desc);
 188         }
 189         acpi_ut_remove_reference(obj_desc);
 190
 191         walk_state->control_state->common.state = ACPI_CONTROL_NORMAL;
 192         return_ACPI_STATUS(status);
 193 }
 194
 195 /*****************************************************************************
 196  *
 197  * FUNCTION:    acpi_ds_exec_begin_op
 198  *
 199  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 200  *              out_op          - Where to return op if a new one is created
 201  *
 202  * RETURN:      Status
 203  *
 204  * DESCRIPTION: Descending callback used during the execution of control
 205  *              methods.  This is where most operators and operands are
 206  *              dispatched to the interpreter.
 207  *
 208  ****************************************************************************/
 209
 210 acpi_status
 211 acpi_ds_exec_begin_op(struct acpi_walk_state *walk_state,
 212                       union acpi_parse_object **out_op)
 213 {
 214         union acpi_parse_object *op;
 215         acpi_status status = AE_OK;
 216         u32 opcode_class;
 217
 218         ACPI_FUNCTION_TRACE_PTR("ds_exec_begin_op", walk_state);
 219
 220         op = walk_state->op;
 221         if (!op) {
 222                 status = acpi_ds_load2_begin_op(walk_state, out_op);
 223                 if (ACPI_FAILURE(status)) {
 224                         return_ACPI_STATUS(status);
 225                 }
 226
 227                 op = *out_op;
 228                 walk_state->op = op;
 229                 walk_state->opcode = op->common.aml_opcode;
 230                 walk_state->op_info =
 231                     acpi_ps_get_opcode_info(op->common.aml_opcode);
 232
 233                 if (acpi_ns_opens_scope(walk_state->op_info->object_type)) {
 234                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 235                                           "(%s) Popping scope for Op %p\n",
 236                                           acpi_ut_get_type_name(walk_state->
 237                                                                 op_info->
 238                                                                 object_type),
 239                                           op));
 240
 241                         status = acpi_ds_scope_stack_pop(walk_state);
 242                         if (ACPI_FAILURE(status)) {
 243                                 return_ACPI_STATUS(status);
 244                         }
 245                 }
 246         }
 247
 248         if (op == walk_state->origin) {
 249                 if (out_op) {
 250                         *out_op = op;
 251                 }
 252
 253                 return_ACPI_STATUS(AE_OK);
 254         }
 255
 256         /*
 257          * If the previous opcode was a conditional, this opcode
 258          * must be the beginning of the associated predicate.
 259          * Save this knowledge in the current scope descriptor
 260          */
 261         if ((walk_state->control_state) &&
 262             (walk_state->control_state->common.state ==
 263              ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
 264                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 265                                   "Exec predicate Op=%p State=%p\n", op,
 266                                   walk_state));
 267
 268                 walk_state->control_state->common.state =
 269                     ACPI_CONTROL_PREDICATE_EXECUTING;
 270
 271                 /* Save start of predicate */
 272
 273                 walk_state->control_state->control.predicate_op = op;
 274         }
 275
 276         opcode_class = walk_state->op_info->class;
 277
 278         /* We want to send namepaths to the load code */
 279
 280         if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
 281                 opcode_class = AML_CLASS_NAMED_OBJECT;
 282         }
 283
 284         /*
 285          * Handle the opcode based upon the opcode type
 286          */
 287         switch (opcode_class) {
 288         case AML_CLASS_CONTROL:
 289
 290                 status = acpi_ds_result_stack_push(walk_state);
 291                 if (ACPI_FAILURE(status)) {
 292                         return_ACPI_STATUS(status);
 293                 }
 294
 295                 status = acpi_ds_exec_begin_control_op(walk_state, op);
 296                 break;
 297
 298         case AML_CLASS_NAMED_OBJECT:
 299
 300                 if (walk_state->walk_type == ACPI_WALK_METHOD) {
 301                         /*
 302                          * Found a named object declaration during method execution;
 303                          * we must enter this object into the namespace.  The created
 304                          * object is temporary and will be deleted upon completion of
 305                          * the execution of this method.
 306                          */
 307                         status = acpi_ds_load2_begin_op(walk_state, NULL);
 308                 }
 309
 310                 if (op->common.aml_opcode == AML_REGION_OP) {
 311                         status = acpi_ds_result_stack_push(walk_state);
 312                 }
 313                 break;
 314
 315         case AML_CLASS_EXECUTE:
 316         case AML_CLASS_CREATE:
 317
 318                 /*
 319                  * Most operators with arguments.
 320                  * Start a new result/operand state
 321                  */
 322                 status = acpi_ds_result_stack_push(walk_state);
 323                 break;
 324
 325         default:
 326                 break;
 327         }
 328
 329         /* Nothing to do here during method execution */
 330
 331         return_ACPI_STATUS(status);
 332 }
 333
 334 /*****************************************************************************
 335  *
 336  * FUNCTION:    acpi_ds_exec_end_op
 337  *
 338  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 339  *
 340  * RETURN:      Status
 341  *
 342  * DESCRIPTION: Ascending callback used during the execution of control
 343  *              methods.  The only thing we really need to do here is to
 344  *              notice the beginning of IF, ELSE, and WHILE blocks.
 345  *
 346  ****************************************************************************/
 347
 348 acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state)
 349 {
 350         union acpi_parse_object *op;
 351         acpi_status status = AE_OK;
 352         u32 op_type;
 353         u32 op_class;
 354         union acpi_parse_object *next_op;
 355         union acpi_parse_object *first_arg;
 356
 357         ACPI_FUNCTION_TRACE_PTR("ds_exec_end_op", walk_state);
 358
 359         op = walk_state->op;
 360         op_type = walk_state->op_info->type;
 361         op_class = walk_state->op_info->class;
 362
 363         if (op_class == AML_CLASS_UNKNOWN) {
 364                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unknown opcode %X\n",
 365                                   op->common.aml_opcode));
 366                 return_ACPI_STATUS(AE_NOT_IMPLEMENTED);
 367         }
 368
 369         first_arg = op->common.value.arg;
 370
 371         /* Init the walk state */
 372
 373         walk_state->num_operands = 0;
 374         walk_state->return_desc = NULL;
 375         walk_state->result_obj = NULL;
 376
 377         /* Call debugger for single step support (DEBUG build only) */
 378
 379         ACPI_DEBUGGER_EXEC(status =
 380                            acpi_db_single_step(walk_state, op, op_class));
 381         ACPI_DEBUGGER_EXEC(if (ACPI_FAILURE(status)) {
 382                            return_ACPI_STATUS(status);}
 383         ) ;
 384
 385         /* Decode the Opcode Class */
 386
 387         switch (op_class) {
 388         case AML_CLASS_ARGUMENT:        /* constants, literals, etc. - do nothing */
 389                 break;
 390
 391         case AML_CLASS_EXECUTE: /* most operators with arguments */
 392
 393                 /* Build resolved operand stack */
 394
 395                 status = acpi_ds_create_operands(walk_state, first_arg);
 396                 if (ACPI_FAILURE(status)) {
 397                         goto cleanup;
 398                 }
 399
 400                 /* Done with this result state (Now that operand stack is built) */
 401
 402                 status = acpi_ds_result_stack_pop(walk_state);
 403                 if (ACPI_FAILURE(status)) {
 404                         goto cleanup;
 405                 }
 406
 407                 /*
 408                  * All opcodes require operand resolution, with the only exceptions
 409                  * being the object_type and size_of operators.
 410                  */
 411                 if (!(walk_state->op_info->flags & AML_NO_OPERAND_RESOLVE)) {
 412                         /* Resolve all operands */
 413
 414                         status = acpi_ex_resolve_operands(walk_state->opcode,
 415                                                           &(walk_state->
 416                                                             operands
 417                                                             [walk_state->
 418                                                              num_operands - 1]),
 419                                                           walk_state);
 420                         if (ACPI_SUCCESS(status)) {
 421                                 ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS,
 422                                                    ACPI_IMODE_EXECUTE,
 423                                                    acpi_ps_get_opcode_name
 424                                                    (walk_state->opcode),
 425                                                    walk_state->num_operands,
 426                                                    "after ex_resolve_operands");
 427                         }
 428                 }
 429
 430                 if (ACPI_SUCCESS(status)) {
 431                         /*
 432                          * Dispatch the request to the appropriate interpreter handler
 433                          * routine.  There is one routine per opcode "type" based upon the
 434                          * number of opcode arguments and return type.
 435                          */
 436                         status =
 437                             acpi_gbl_op_type_dispatch[op_type] (walk_state);
 438                 } else {
 439                         /*
 440                          * Treat constructs of the form "Store(local_x,local_x)" as noops when the
 441                          * Local is uninitialized.
 442                          */
 443                         if ((status == AE_AML_UNINITIALIZED_LOCAL) &&
 444                             (walk_state->opcode == AML_STORE_OP) &&
 445                             (walk_state->operands[0]->common.type ==
 446                              ACPI_TYPE_LOCAL_REFERENCE)
 447                             && (walk_state->operands[1]->common.type ==
 448                                 ACPI_TYPE_LOCAL_REFERENCE)
 449                             && (walk_state->operands[0]->reference.opcode ==
 450                                 walk_state->operands[1]->reference.opcode)
 451                             && (walk_state->operands[0]->reference.offset ==
 452                                 walk_state->operands[1]->reference.offset)) {
 453                                 status = AE_OK;
 454                         } else {
 455                                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
 456                                                   "[%s]: Could not resolve operands, %s\n",
 457                                                   acpi_ps_get_opcode_name
 458                                                   (walk_state->opcode),
 459                                                   acpi_format_exception
 460                                                   (status)));
 461                         }
 462                 }
 463
 464                 /* Always delete the argument objects and clear the operand stack */
 465
 466                 acpi_ds_clear_operands(walk_state);
 467
 468                 /*
 469                  * If a result object was returned from above, push it on the
 470                  * current result stack
 471                  */
 472                 if (ACPI_SUCCESS(status) && walk_state->result_obj) {
 473                         status =
 474                             acpi_ds_result_push(walk_state->result_obj,
 475                                                 walk_state);
 476                 }
 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                         /* Make sure to properly pop the result stack */
 490
 491                         if (ACPI_SUCCESS(status)) {
 492                                 status = acpi_ds_result_stack_pop(walk_state);
 493                         } else if (status == AE_CTRL_PENDING) {
 494                                 status = acpi_ds_result_stack_pop(walk_state);
 495                                 if (ACPI_SUCCESS(status)) {
 496                                         status = AE_CTRL_PENDING;
 497                                 }
 498                         }
 499                         break;
 500
 501                 case AML_TYPE_METHOD_CALL:
 502
 503                         /*
 504                          * If the method is referenced from within a package
 505                          * declaration, it is not a invocation of the method, just
 506                          * a reference to it.
 507                          */
 508                         if ((op->asl.parent) &&
 509                             ((op->asl.parent->asl.aml_opcode == AML_PACKAGE_OP)
 510                              || (op->asl.parent->asl.aml_opcode ==
 511                                  AML_VAR_PACKAGE_OP))) {
 512                                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 513                                                   "Method Reference in a Package, Op=%p\n",
 514                                                   op));
 515                                 op->common.node =
 516                                     (struct acpi_namespace_node *)op->asl.value.
 517                                     arg->asl.node->object;
 518                                 acpi_ut_add_reference(op->asl.value.arg->asl.
 519                                                       node->object);
 520                                 return_ACPI_STATUS(AE_OK);
 521                         }
 522
 523                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 524                                           "Method invocation, Op=%p\n", op));
 525
 526                         /*
 527                          * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains
 528                          * the method Node pointer
 529                          */
 530                         /* next_op points to the op that holds the method name */
 531
 532                         next_op = first_arg;
 533
 534                         /* next_op points to first argument op */
 535
 536                         next_op = next_op->common.next;
 537
 538                         /*
 539                          * Get the method's arguments and put them on the operand stack
 540                          */
 541                         status = acpi_ds_create_operands(walk_state, next_op);
 542                         if (ACPI_FAILURE(status)) {
 543                                 break;
 544                         }
 545
 546                         /*
 547                          * Since the operands will be passed to another control method,
 548                          * we must resolve all local references here (Local variables,
 549                          * arguments to *this* method, etc.)
 550                          */
 551                         status = acpi_ds_resolve_operands(walk_state);
 552                         if (ACPI_FAILURE(status)) {
 553                                 /* On error, clear all resolved operands */
 554
 555                                 acpi_ds_clear_operands(walk_state);
 556                                 break;
 557                         }
 558
 559                         /*
 560                          * Tell the walk loop to preempt this running method and
 561                          * execute the new method
 562                          */
 563                         status = AE_CTRL_TRANSFER;
 564
 565                         /*
 566                          * Return now; we don't want to disturb anything,
 567                          * especially the operand count!
 568                          */
 569                         return_ACPI_STATUS(status);
 570
 571                 case AML_TYPE_CREATE_FIELD:
 572
 573                         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 574                                           "Executing create_field Buffer/Index Op=%p\n",
 575                                           op));
 576
 577                         status = acpi_ds_load2_end_op(walk_state);
 578                         if (ACPI_FAILURE(status)) {
 579                                 break;
 580                         }
 581
 582                         status =
 583                             acpi_ds_eval_buffer_field_operands(walk_state, op);
 584                         break;
 585
 586                 case AML_TYPE_CREATE_OBJECT:
 587
 588                         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 589                                           "Executing create_object (Buffer/Package) Op=%p\n",
 590                                           op));
 591
 592                         switch (op->common.parent->common.aml_opcode) {
 593                         case AML_NAME_OP:
 594
 595                                 /*
 596                                  * Put the Node on the object stack (Contains the ACPI Name
 597                                  * of this object)
 598                                  */
 599                                 walk_state->operands[0] =
 600                                     (void *)op->common.parent->common.node;
 601                                 walk_state->num_operands = 1;
 602
 603                                 status = acpi_ds_create_node(walk_state,
 604                                                              op->common.parent->
 605                                                              common.node,
 606                                                              op->common.parent);
 607                                 if (ACPI_FAILURE(status)) {
 608                                         break;
 609                                 }
 610
 611                                 /* Fall through */
 612                                 /*lint -fallthrough */
 613
 614                         case AML_INT_EVAL_SUBTREE_OP:
 615
 616                                 status =
 617                                     acpi_ds_eval_data_object_operands
 618                                     (walk_state, op,
 619                                      acpi_ns_get_attached_object(op->common.
 620                                                                  parent->common.
 621                                                                  node));
 622                                 break;
 623
 624                         default:
 625
 626                                 status =
 627                                     acpi_ds_eval_data_object_operands
 628                                     (walk_state, op, NULL);
 629                                 break;
 630                         }
 631
 632                         /* Done with result state (Now that operand stack is built) */
 633
 634                         status = acpi_ds_result_stack_pop(walk_state);
 635                         if (ACPI_FAILURE(status)) {
 636                                 goto cleanup;
 637                         }
 638
 639                         /*
 640                          * If a result object was returned from above, push it on the
 641                          * current result stack
 642                          */
 643                         if (walk_state->result_obj) {
 644                                 status =
 645                                     acpi_ds_result_push(walk_state->result_obj,
 646                                                         walk_state);
 647                         }
 648                         break;
 649
 650                 case AML_TYPE_NAMED_FIELD:
 651                 case AML_TYPE_NAMED_COMPLEX:
 652                 case AML_TYPE_NAMED_SIMPLE:
 653                 case AML_TYPE_NAMED_NO_OBJ:
 654
 655                         status = acpi_ds_load2_end_op(walk_state);
 656                         if (ACPI_FAILURE(status)) {
 657                                 break;
 658                         }
 659
 660                         if (op->common.aml_opcode == AML_REGION_OP) {
 661                                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 662                                                   "Executing op_region Address/Length Op=%p\n",
 663                                                   op));
 664
 665                                 status =
 666                                     acpi_ds_eval_region_operands(walk_state,
 667                                                                  op);
 668                                 if (ACPI_FAILURE(status)) {
 669                                         break;
 670                                 }
 671
 672                                 status = acpi_ds_result_stack_pop(walk_state);
 673                         }
 674
 675                         break;
 676
 677                 case AML_TYPE_UNDEFINED:
 678
 679                         ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
 680                                           "Undefined opcode type Op=%p\n", op));
 681                         return_ACPI_STATUS(AE_NOT_IMPLEMENTED);
 682
 683                 case AML_TYPE_BOGUS:
 684
 685                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 686                                           "Internal opcode=%X type Op=%p\n",
 687                                           walk_state->opcode, op));
 688                         break;
 689
 690                 default:
 691
 692                         ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
 693                                           "Unimplemented opcode, class=%X type=%X Opcode=%X Op=%p\n",
 694                                           op_class, op_type,
 695                                           op->common.aml_opcode, op));
 696
 697                         status = AE_NOT_IMPLEMENTED;
 698                         break;
 699                 }
 700         }
 701
 702         /*
 703          * ACPI 2.0 support for 64-bit integers: Truncate numeric
 704          * result value if we are executing from a 32-bit ACPI table
 705          */
 706         acpi_ex_truncate_for32bit_table(walk_state->result_obj);
 707
 708         /*
 709          * Check if we just completed the evaluation of a
 710          * conditional predicate
 711          */
 712
 713         if ((ACPI_SUCCESS(status)) &&
 714             (walk_state->control_state) &&
 715             (walk_state->control_state->common.state ==
 716              ACPI_CONTROL_PREDICATE_EXECUTING) &&
 717             (walk_state->control_state->control.predicate_op == op)) {
 718                 status =
 719                     acpi_ds_get_predicate_value(walk_state,
 720                                                 walk_state->result_obj);
 721                 walk_state->result_obj = NULL;
 722         }
 723
 724       cleanup:
 725
 726         /* Invoke exception handler on error */
 727
 728         if (ACPI_FAILURE(status) &&
 729             acpi_gbl_exception_handler && !(status & AE_CODE_CONTROL)) {
 730                 acpi_ex_exit_interpreter();
 731                 status = acpi_gbl_exception_handler(status,
 732                                                     walk_state->method_node->
 733                                                     name.integer,
 734                                                     walk_state->opcode,
 735                                                     walk_state->aml_offset,
 736                                                     NULL);
 737                 (void)acpi_ex_enter_interpreter();
 738         }
 739
 740         if (walk_state->result_obj) {
 741                 /* Break to debugger to display result */
 742
 743                 ACPI_DEBUGGER_EXEC(acpi_db_display_result_object
 744                                    (walk_state->result_obj, walk_state));
 745
 746                 /*
 747                  * Delete the result op if and only if:
 748                  * Parent will not use the result -- such as any
 749                  * non-nested type2 op in a method (parent will be method)
 750                  */
 751                 acpi_ds_delete_result_if_not_used(op, walk_state->result_obj,
 752                                                   walk_state);
 753         }
 754 #ifdef _UNDER_DEVELOPMENT
 755
 756         if (walk_state->parser_state.aml == walk_state->parser_state.aml_end) {
 757                 acpi_db_method_end(walk_state);
 758         }
 759 #endif
 760
 761         /* Always clear the object stack */
 762
 763         walk_state->num_operands = 0;
 764
 765 #ifdef ACPI_DISASSEMBLER
 766
 767         /* On error, display method locals/args */
 768
 769         if (ACPI_FAILURE(status)) {
 770                 acpi_dm_dump_method_info(status, walk_state, op);
 771         }
 772 #endif
 773
 774         return_ACPI_STATUS(status);
 775 }