git.oblomov.eu Git - linux-2.6/blob - 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                  * Most operators with arguments.
 319                  * Start a new result/operand state
 320                  */
 321                 if (walk_state->opcode != AML_CREATE_FIELD_OP) {
 322                         status = acpi_ds_result_stack_push(walk_state);
 323                 }
 324                 break;
 325
 326         default:
 327                 break;
 328         }
 329
 330         /* Nothing to do here during method execution */
 331
 332         return_ACPI_STATUS(status);
 333 }
 334
 335 /*****************************************************************************
 336  *
 337  * FUNCTION:    acpi_ds_exec_end_op
 338  *
 339  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 340  *
 341  * RETURN:      Status
 342  *
 343  * DESCRIPTION: Ascending callback used during the execution of control
 344  *              methods.  The only thing we really need to do here is to
 345  *              notice the beginning of IF, ELSE, and WHILE blocks.
 346  *
 347  ****************************************************************************/
 348
 349 acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state)
 350 {
 351         union acpi_parse_object *op;
 352         acpi_status status = AE_OK;
 353         u32 op_type;
 354         u32 op_class;
 355         union acpi_parse_object *next_op;
 356         union acpi_parse_object *first_arg;
 357
 358         ACPI_FUNCTION_TRACE_PTR("ds_exec_end_op", walk_state);
 359
 360         op = walk_state->op;
 361         op_type = walk_state->op_info->type;
 362         op_class = walk_state->op_info->class;
 363
 364         if (op_class == AML_CLASS_UNKNOWN) {
 365                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unknown opcode %X\n",
 366                                   op->common.aml_opcode));
 367                 return_ACPI_STATUS(AE_NOT_IMPLEMENTED);
 368         }
 369
 370         first_arg = op->common.value.arg;
 371
 372         /* Init the walk state */
 373
 374         walk_state->num_operands = 0;
 375         walk_state->return_desc = NULL;
 376         walk_state->result_obj = NULL;
 377
 378         /* Call debugger for single step support (DEBUG build only) */
 379
 380         ACPI_DEBUGGER_EXEC(status =
 381                            acpi_db_single_step(walk_state, op, op_class));
 382         ACPI_DEBUGGER_EXEC(if (ACPI_FAILURE(status)) {
 383                            return_ACPI_STATUS(status);}
 384         ) ;
 385
 386         /* Decode the Opcode Class */
 387
 388         switch (op_class) {
 389         case AML_CLASS_ARGUMENT:        /* constants, literals, etc. - do nothing */
 390                 break;
 391
 392         case AML_CLASS_EXECUTE: /* most operators with arguments */
 393
 394                 /* Build resolved operand stack */
 395
 396                 status = acpi_ds_create_operands(walk_state, first_arg);
 397                 if (ACPI_FAILURE(status)) {
 398                         goto cleanup;
 399                 }
 400
 401                 /* Done with this result state (Now that operand stack is built) */
 402
 403                 status = acpi_ds_result_stack_pop(walk_state);
 404                 if (ACPI_FAILURE(status)) {
 405                         goto cleanup;
 406                 }
 407
 408                 /*
 409                  * All opcodes require operand resolution, with the only exceptions
 410                  * being the object_type and size_of operators.
 411                  */
 412                 if (!(walk_state->op_info->flags & AML_NO_OPERAND_RESOLVE)) {
 413                         /* Resolve all operands */
 414
 415                         status = acpi_ex_resolve_operands(walk_state->opcode,
 416                                                           &(walk_state->
 417                                                             operands
 418                                                             [walk_state->
 419                                                              num_operands - 1]),
 420                                                           walk_state);
 421                         if (ACPI_SUCCESS(status)) {
 422                                 ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS,
 423                                                    ACPI_IMODE_EXECUTE,
 424                                                    acpi_ps_get_opcode_name
 425                                                    (walk_state->opcode),
 426                                                    walk_state->num_operands,
 427                                                    "after ex_resolve_operands");
 428                         }
 429                 }
 430
 431                 if (ACPI_SUCCESS(status)) {
 432                         /*
 433                          * Dispatch the request to the appropriate interpreter handler
 434                          * routine.  There is one routine per opcode "type" based upon the
 435                          * number of opcode arguments and return type.
 436                          */
 437                         status =
 438                             acpi_gbl_op_type_dispatch[op_type] (walk_state);
 439                 } else {
 440                         /*
 441                          * Treat constructs of the form "Store(local_x,local_x)" as noops when the
 442                          * Local is uninitialized.
 443                          */
 444                         if ((status == AE_AML_UNINITIALIZED_LOCAL) &&
 445                             (walk_state->opcode == AML_STORE_OP) &&
 446                             (walk_state->operands[0]->common.type ==
 447                              ACPI_TYPE_LOCAL_REFERENCE)
 448                             && (walk_state->operands[1]->common.type ==
 449                                 ACPI_TYPE_LOCAL_REFERENCE)
 450                             && (walk_state->operands[0]->reference.opcode ==
 451                                 walk_state->operands[1]->reference.opcode)
 452                             && (walk_state->operands[0]->reference.offset ==
 453                                 walk_state->operands[1]->reference.offset)) {
 454                                 status = AE_OK;
 455                         } else {
 456                                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
 457                                                   "[%s]: Could not resolve operands, %s\n",
 458                                                   acpi_ps_get_opcode_name
 459                                                   (walk_state->opcode),
 460                                                   acpi_format_exception
 461                                                   (status)));
 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
 479                 break;
 480
 481         default:
 482
 483                 switch (op_type) {
 484                 case AML_TYPE_CONTROL:  /* Type 1 opcode, IF/ELSE/WHILE/NOOP */
 485
 486                         /* 1 Operand, 0 external_result, 0 internal_result */
 487
 488                         status = acpi_ds_exec_end_control_op(walk_state, op);
 489
 490                         /* Make sure to properly pop the result stack */
 491
 492                         if (ACPI_SUCCESS(status)) {
 493                                 status = acpi_ds_result_stack_pop(walk_state);
 494                         } else if (status == AE_CTRL_PENDING) {
 495                                 status = acpi_ds_result_stack_pop(walk_state);
 496                                 if (ACPI_SUCCESS(status)) {
 497                                         status = AE_CTRL_PENDING;
 498                                 }
 499                         }
 500                         break;
 501
 502                 case AML_TYPE_METHOD_CALL:
 503
 504                         /*
 505                          * If the method is referenced from within a package
 506                          * declaration, it is not a invocation of the method, just
 507                          * a reference to it.
 508                          */
 509                         if ((op->asl.parent) &&
 510                             ((op->asl.parent->asl.aml_opcode == AML_PACKAGE_OP)
 511                              || (op->asl.parent->asl.aml_opcode ==
 512                                  AML_VAR_PACKAGE_OP))) {
 513                                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 514                                                   "Method Reference in a Package, Op=%p\n",
 515                                                   op));
 516                                 op->common.node =
 517                                     (struct acpi_namespace_node *)op->asl.value.
 518                                     arg->asl.node->object;
 519                                 acpi_ut_add_reference(op->asl.value.arg->asl.
 520                                                       node->object);
 521                                 return_ACPI_STATUS(AE_OK);
 522                         }
 523
 524                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 525                                           "Method invocation, Op=%p\n", op));
 526
 527                         /*
 528                          * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains
 529                          * the method Node pointer
 530                          */
 531                         /* next_op points to the op that holds the method name */
 532
 533                         next_op = first_arg;
 534
 535                         /* next_op points to first argument op */
 536
 537                         next_op = next_op->common.next;
 538
 539                         /*
 540                          * Get the method's arguments and put them on the operand stack
 541                          */
 542                         status = acpi_ds_create_operands(walk_state, next_op);
 543                         if (ACPI_FAILURE(status)) {
 544                                 break;
 545                         }
 546
 547                         /*
 548                          * Since the operands will be passed to another control method,
 549                          * we must resolve all local references here (Local variables,
 550                          * arguments to *this* method, etc.)
 551                          */
 552                         status = acpi_ds_resolve_operands(walk_state);
 553                         if (ACPI_FAILURE(status)) {
 554                                 /* On error, clear all resolved operands */
 555
 556                                 acpi_ds_clear_operands(walk_state);
 557                                 break;
 558                         }
 559
 560                         /*
 561                          * Tell the walk loop to preempt this running method and
 562                          * execute the new method
 563                          */
 564                         status = AE_CTRL_TRANSFER;
 565
 566                         /*
 567                          * Return now; we don't want to disturb anything,
 568                          * especially the operand count!
 569                          */
 570                         return_ACPI_STATUS(status);
 571
 572                 case AML_TYPE_CREATE_FIELD:
 573
 574                         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 575                                           "Executing create_field Buffer/Index Op=%p\n",
 576                                           op));
 577
 578                         status = acpi_ds_load2_end_op(walk_state);
 579                         if (ACPI_FAILURE(status)) {
 580                                 break;
 581                         }
 582
 583                         status =
 584                             acpi_ds_eval_buffer_field_operands(walk_state, op);
 585                         break;
 586
 587                 case AML_TYPE_CREATE_OBJECT:
 588
 589                         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 590                                           "Executing create_object (Buffer/Package) Op=%p\n",
 591                                           op));
 592
 593                         switch (op->common.parent->common.aml_opcode) {
 594                         case AML_NAME_OP:
 595
 596                                 /*
 597                                  * Put the Node on the object stack (Contains the ACPI Name
 598                                  * of this object)
 599                                  */
 600                                 walk_state->operands[0] =
 601                                     (void *)op->common.parent->common.node;
 602                                 walk_state->num_operands = 1;
 603
 604                                 status = acpi_ds_create_node(walk_state,
 605                                                              op->common.parent->
 606                                                              common.node,
 607                                                              op->common.parent);
 608                                 if (ACPI_FAILURE(status)) {
 609                                         break;
 610                                 }
 611
 612                                 /* Fall through */
 613                                 /*lint -fallthrough */
 614
 615                         case AML_INT_EVAL_SUBTREE_OP:
 616
 617                                 status =
 618                                     acpi_ds_eval_data_object_operands
 619                                     (walk_state, op,
 620                                      acpi_ns_get_attached_object(op->common.
 621                                                                  parent->common.
 622                                                                  node));
 623                                 break;
 624
 625                         default:
 626
 627                                 status =
 628                                     acpi_ds_eval_data_object_operands
 629                                     (walk_state, op, NULL);
 630                                 break;
 631                         }
 632
 633                         /* Done with result state (Now that operand stack is built) */
 634
 635                         status = acpi_ds_result_stack_pop(walk_state);
 636                         if (ACPI_FAILURE(status)) {
 637                                 goto cleanup;
 638                         }
 639
 640                         /*
 641                          * If a result object was returned from above, push it on the
 642                          * current result stack
 643                          */
 644                         if (walk_state->result_obj) {
 645                                 status =
 646                                     acpi_ds_result_push(walk_state->result_obj,
 647                                                         walk_state);
 648                         }
 649                         break;
 650
 651                 case AML_TYPE_NAMED_FIELD:
 652                 case AML_TYPE_NAMED_COMPLEX:
 653                 case AML_TYPE_NAMED_SIMPLE:
 654                 case AML_TYPE_NAMED_NO_OBJ:
 655
 656                         status = acpi_ds_load2_end_op(walk_state);
 657                         if (ACPI_FAILURE(status)) {
 658                                 break;
 659                         }
 660
 661                         if (op->common.aml_opcode == AML_REGION_OP) {
 662                                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 663                                                   "Executing op_region Address/Length Op=%p\n",
 664                                                   op));
 665
 666                                 status =
 667                                     acpi_ds_eval_region_operands(walk_state,
 668                                                                  op);
 669                                 if (ACPI_FAILURE(status)) {
 670                                         break;
 671                                 }
 672
 673                                 status = acpi_ds_result_stack_pop(walk_state);
 674                         }
 675
 676                         break;
 677
 678                 case AML_TYPE_UNDEFINED:
 679
 680                         ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
 681                                           "Undefined opcode type Op=%p\n", 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_DEBUG_PRINT((ACPI_DB_ERROR,
 694                                           "Unimplemented opcode, class=%X type=%X Opcode=%X Op=%p\n",
 695                                           op_class, op_type,
 696                                           op->common.aml_opcode, op));
 697
 698                         status = AE_NOT_IMPLEMENTED;
 699                         break;
 700                 }
 701         }
 702
 703         /*
 704          * ACPI 2.0 support for 64-bit integers: Truncate numeric
 705          * result value if we are executing from a 32-bit ACPI table
 706          */
 707         acpi_ex_truncate_for32bit_table(walk_state->result_obj);
 708
 709         /*
 710          * Check if we just completed the evaluation of a
 711          * conditional predicate
 712          */
 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                 /* Break to debugger to display result */
 729
 730                 ACPI_DEBUGGER_EXEC(acpi_db_display_result_object
 731                                    (walk_state->result_obj, walk_state));
 732
 733                 /*
 734                  * Delete the result op if and only if:
 735                  * Parent will not use the result -- such as any
 736                  * non-nested type2 op in a method (parent will be method)
 737                  */
 738                 acpi_ds_delete_result_if_not_used(op, walk_state->result_obj,
 739                                                   walk_state);
 740         }
 741 #ifdef _UNDER_DEVELOPMENT
 742
 743         if (walk_state->parser_state.aml == walk_state->parser_state.aml_end) {
 744                 acpi_db_method_end(walk_state);
 745         }
 746 #endif
 747
 748         /* Invoke exception handler on error */
 749
 750         if (ACPI_FAILURE(status)) {
 751                 status = acpi_ds_method_error(status, walk_state);
 752         }
 753
 754         /* Always clear the object stack */
 755
 756         walk_state->num_operands = 0;
 757         return_ACPI_STATUS(status);
 758 }