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 - 2006, 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_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 obj_desc=%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) obj_desc=%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       cleanup:
 171
 172         ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Completed a predicate eval=%X Op=%p\n",
 173                           walk_state->control_state->common.value,
 174                           walk_state->op));
 175
 176         /* Break to debugger to display result */
 177
 178         ACPI_DEBUGGER_EXEC(acpi_db_display_result_object
 179                            (local_obj_desc, walk_state));
 180
 181         /*
 182          * Delete the predicate result object (we know that
 183          * we don't need it anymore)
 184          */
 185         if (local_obj_desc != obj_desc) {
 186                 acpi_ut_remove_reference(local_obj_desc);
 187         }
 188         acpi_ut_remove_reference(obj_desc);
 189
 190         walk_state->control_state->common.state = ACPI_CONTROL_NORMAL;
 191         return_ACPI_STATUS(status);
 192 }
 193
 194 /*****************************************************************************
 195  *
 196  * FUNCTION:    acpi_ds_exec_begin_op
 197  *
 198  * PARAMETERS:  walk_state      - Current state of the parse tree walk
 199  *              out_op          - Where to return op if a new one is created
 200  *
 201  * RETURN:      Status
 202  *
 203  * DESCRIPTION: Descending callback used during the execution of control
 204  *              methods.  This is where most operators and operands are
 205  *              dispatched to the interpreter.
 206  *
 207  ****************************************************************************/
 208
 209 acpi_status
 210 acpi_ds_exec_begin_op(struct acpi_walk_state *walk_state,
 211                       union acpi_parse_object **out_op)
 212 {
 213         union acpi_parse_object *op;
 214         acpi_status status = AE_OK;
 215         u32 opcode_class;
 216
 217         ACPI_FUNCTION_TRACE_PTR("ds_exec_begin_op", walk_state);
 218
 219         op = walk_state->op;
 220         if (!op) {
 221                 status = acpi_ds_load2_begin_op(walk_state, out_op);
 222                 if (ACPI_FAILURE(status)) {
 223                         return_ACPI_STATUS(status);
 224                 }
 225
 226                 op = *out_op;
 227                 walk_state->op = op;
 228                 walk_state->opcode = op->common.aml_opcode;
 229                 walk_state->op_info =
 230                     acpi_ps_get_opcode_info(op->common.aml_opcode);
 231
 232                 if (acpi_ns_opens_scope(walk_state->op_info->object_type)) {
 233                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 234                                           "(%s) Popping scope for Op %p\n",
 235                                           acpi_ut_get_type_name(walk_state->
 236                                                                 op_info->
 237                                                                 object_type),
 238                                           op));
 239
 240                         status = acpi_ds_scope_stack_pop(walk_state);
 241                         if (ACPI_FAILURE(status)) {
 242                                 return_ACPI_STATUS(status);
 243                         }
 244                 }
 245         }
 246
 247         if (op == walk_state->origin) {
 248                 if (out_op) {
 249                         *out_op = op;
 250                 }
 251
 252                 return_ACPI_STATUS(AE_OK);
 253         }
 254
 255         /*
 256          * If the previous opcode was a conditional, this opcode
 257          * must be the beginning of the associated predicate.
 258          * Save this knowledge in the current scope descriptor
 259          */
 260         if ((walk_state->control_state) &&
 261             (walk_state->control_state->common.state ==
 262              ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
 263                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 264                                   "Exec predicate Op=%p State=%p\n", op,
 265                                   walk_state));
 266
 267                 walk_state->control_state->common.state =
 268                     ACPI_CONTROL_PREDICATE_EXECUTING;
 269
 270                 /* Save start of predicate */
 271
 272                 walk_state->control_state->control.predicate_op = op;
 273         }
 274
 275         opcode_class = walk_state->op_info->class;
 276
 277         /* We want to send namepaths to the load code */
 278
 279         if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
 280                 opcode_class = AML_CLASS_NAMED_OBJECT;
 281         }
 282
 283         /*
 284          * Handle the opcode based upon the opcode type
 285          */
 286         switch (opcode_class) {
 287         case AML_CLASS_CONTROL:
 288
 289                 status = acpi_ds_result_stack_push(walk_state);
 290                 if (ACPI_FAILURE(status)) {
 291                         return_ACPI_STATUS(status);
 292                 }
 293
 294                 status = acpi_ds_exec_begin_control_op(walk_state, op);
 295                 break;
 296
 297         case AML_CLASS_NAMED_OBJECT:
 298
 299                 if (walk_state->walk_type == ACPI_WALK_METHOD) {
 300                         /*
 301                          * Found a named object declaration during method execution;
 302                          * we must enter this object into the namespace.  The created
 303                          * object is temporary and will be deleted upon completion of
 304                          * the execution of this method.
 305                          */
 306                         status = acpi_ds_load2_begin_op(walk_state, NULL);
 307                 }
 308
 309                 if (op->common.aml_opcode == AML_REGION_OP) {
 310                         status = acpi_ds_result_stack_push(walk_state);
 311                 }
 312                 break;
 313
 314         case AML_CLASS_EXECUTE:
 315         case AML_CLASS_CREATE:
 316                 /*
 317                  * Most operators with arguments.
 318                  * Start a new result/operand state
 319                  */
 320                 if (walk_state->opcode != AML_CREATE_FIELD_OP) {
 321                         status = acpi_ds_result_stack_push(walk_state);
 322                 }
 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_ERROR((AE_INFO, "Unknown opcode %X",
 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_EXCEPTION((AE_INFO, status,
 456                                                 "While resolving operands for [%s]",
 457                                                 acpi_ps_get_opcode_name
 458                                                 (walk_state->opcode)));
 459                         }
 460                 }
 461
 462                 /* Always delete the argument objects and clear the operand stack */
 463
 464                 acpi_ds_clear_operands(walk_state);
 465
 466                 /*
 467                  * If a result object was returned from above, push it on the
 468                  * current result stack
 469                  */
 470                 if (ACPI_SUCCESS(status) && walk_state->result_obj) {
 471                         status =
 472                             acpi_ds_result_push(walk_state->result_obj,
 473                                                 walk_state);
 474                 }
 475
 476                 break;
 477
 478         default:
 479
 480                 switch (op_type) {
 481                 case AML_TYPE_CONTROL:  /* Type 1 opcode, IF/ELSE/WHILE/NOOP */
 482
 483                         /* 1 Operand, 0 external_result, 0 internal_result */
 484
 485                         status = acpi_ds_exec_end_control_op(walk_state, op);
 486
 487                         /* Make sure to properly pop the result stack */
 488
 489                         if (ACPI_SUCCESS(status)) {
 490                                 status = acpi_ds_result_stack_pop(walk_state);
 491                         } else if (status == AE_CTRL_PENDING) {
 492                                 status = acpi_ds_result_stack_pop(walk_state);
 493                                 if (ACPI_SUCCESS(status)) {
 494                                         status = AE_CTRL_PENDING;
 495                                 }
 496                         }
 497                         break;
 498
 499                 case AML_TYPE_METHOD_CALL:
 500
 501                         /*
 502                          * If the method is referenced from within a package
 503                          * declaration, it is not a invocation of the method, just
 504                          * a reference to it.
 505                          */
 506                         if ((op->asl.parent) &&
 507                             ((op->asl.parent->asl.aml_opcode == AML_PACKAGE_OP)
 508                              || (op->asl.parent->asl.aml_opcode ==
 509                                  AML_VAR_PACKAGE_OP))) {
 510                                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 511                                                   "Method Reference in a Package, Op=%p\n",
 512                                                   op));
 513                                 op->common.node =
 514                                     (struct acpi_namespace_node *)op->asl.value.
 515                                     arg->asl.node->object;
 516                                 acpi_ut_add_reference(op->asl.value.arg->asl.
 517                                                       node->object);
 518                                 return_ACPI_STATUS(AE_OK);
 519                         }
 520
 521                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 522                                           "Method invocation, Op=%p\n", op));
 523
 524                         /*
 525                          * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains
 526                          * the method Node pointer
 527                          */
 528                         /* next_op points to the op that holds the method name */
 529
 530                         next_op = first_arg;
 531
 532                         /* next_op points to first argument op */
 533
 534                         next_op = next_op->common.next;
 535
 536                         /*
 537                          * Get the method's arguments and put them on the operand stack
 538                          */
 539                         status = acpi_ds_create_operands(walk_state, next_op);
 540                         if (ACPI_FAILURE(status)) {
 541                                 break;
 542                         }
 543
 544                         /*
 545                          * Since the operands will be passed to another control method,
 546                          * we must resolve all local references here (Local variables,
 547                          * arguments to *this* method, etc.)
 548                          */
 549                         status = acpi_ds_resolve_operands(walk_state);
 550                         if (ACPI_FAILURE(status)) {
 551                                 /* On error, clear all resolved operands */
 552
 553                                 acpi_ds_clear_operands(walk_state);
 554                                 break;
 555                         }
 556
 557                         /*
 558                          * Tell the walk loop to preempt this running method and
 559                          * execute the new method
 560                          */
 561                         status = AE_CTRL_TRANSFER;
 562
 563                         /*
 564                          * Return now; we don't want to disturb anything,
 565                          * especially the operand count!
 566                          */
 567                         return_ACPI_STATUS(status);
 568
 569                 case AML_TYPE_CREATE_FIELD:
 570
 571                         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 572                                           "Executing create_field Buffer/Index Op=%p\n",
 573                                           op));
 574
 575                         status = acpi_ds_load2_end_op(walk_state);
 576                         if (ACPI_FAILURE(status)) {
 577                                 break;
 578                         }
 579
 580                         status =
 581                             acpi_ds_eval_buffer_field_operands(walk_state, op);
 582                         break;
 583
 584                 case AML_TYPE_CREATE_OBJECT:
 585
 586                         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 587                                           "Executing create_object (Buffer/Package) Op=%p\n",
 588                                           op));
 589
 590                         switch (op->common.parent->common.aml_opcode) {
 591                         case AML_NAME_OP:
 592
 593                                 /*
 594                                  * Put the Node on the object stack (Contains the ACPI Name
 595                                  * of this object)
 596                                  */
 597                                 walk_state->operands[0] =
 598                                     (void *)op->common.parent->common.node;
 599                                 walk_state->num_operands = 1;
 600
 601                                 status = acpi_ds_create_node(walk_state,
 602                                                              op->common.parent->
 603                                                              common.node,
 604                                                              op->common.parent);
 605                                 if (ACPI_FAILURE(status)) {
 606                                         break;
 607                                 }
 608
 609                                 /* Fall through */
 610                                 /*lint -fallthrough */
 611
 612                         case AML_INT_EVAL_SUBTREE_OP:
 613
 614                                 status =
 615                                     acpi_ds_eval_data_object_operands
 616                                     (walk_state, op,
 617                                      acpi_ns_get_attached_object(op->common.
 618                                                                  parent->common.
 619                                                                  node));
 620                                 break;
 621
 622                         default:
 623
 624                                 status =
 625                                     acpi_ds_eval_data_object_operands
 626                                     (walk_state, op, NULL);
 627                                 break;
 628                         }
 629
 630                         /* Done with result state (Now that operand stack is built) */
 631
 632                         status = acpi_ds_result_stack_pop(walk_state);
 633                         if (ACPI_FAILURE(status)) {
 634                                 goto cleanup;
 635                         }
 636
 637                         /*
 638                          * If a result object was returned from above, push it on the
 639                          * current result stack
 640                          */
 641                         if (walk_state->result_obj) {
 642                                 status =
 643                                     acpi_ds_result_push(walk_state->result_obj,
 644                                                         walk_state);
 645                         }
 646                         break;
 647
 648                 case AML_TYPE_NAMED_FIELD:
 649                 case AML_TYPE_NAMED_COMPLEX:
 650                 case AML_TYPE_NAMED_SIMPLE:
 651                 case AML_TYPE_NAMED_NO_OBJ:
 652
 653                         status = acpi_ds_load2_end_op(walk_state);
 654                         if (ACPI_FAILURE(status)) {
 655                                 break;
 656                         }
 657
 658                         if (op->common.aml_opcode == AML_REGION_OP) {
 659                                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 660                                                   "Executing op_region Address/Length Op=%p\n",
 661                                                   op));
 662
 663                                 status =
 664                                     acpi_ds_eval_region_operands(walk_state,
 665                                                                  op);
 666                                 if (ACPI_FAILURE(status)) {
 667                                         break;
 668                                 }
 669
 670                                 status = acpi_ds_result_stack_pop(walk_state);
 671                         }
 672
 673                         break;
 674
 675                 case AML_TYPE_UNDEFINED:
 676
 677                         ACPI_ERROR((AE_INFO,
 678                                     "Undefined opcode type Op=%p", op));
 679                         return_ACPI_STATUS(AE_NOT_IMPLEMENTED);
 680
 681                 case AML_TYPE_BOGUS:
 682
 683                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 684                                           "Internal opcode=%X type Op=%p\n",
 685                                           walk_state->opcode, op));
 686                         break;
 687
 688                 default:
 689
 690                         ACPI_ERROR((AE_INFO,
 691                                     "Unimplemented opcode, class=%X type=%X Opcode=%X Op=%p",
 692                                     op_class, op_type, op->common.aml_opcode,
 693                                     op));
 694
 695                         status = AE_NOT_IMPLEMENTED;
 696                         break;
 697                 }
 698         }
 699
 700         /*
 701          * ACPI 2.0 support for 64-bit integers: Truncate numeric
 702          * result value if we are executing from a 32-bit ACPI table
 703          */
 704         acpi_ex_truncate_for32bit_table(walk_state->result_obj);
 705
 706         /*
 707          * Check if we just completed the evaluation of a
 708          * conditional predicate
 709          */
 710
 711         if ((ACPI_SUCCESS(status)) &&
 712             (walk_state->control_state) &&
 713             (walk_state->control_state->common.state ==
 714              ACPI_CONTROL_PREDICATE_EXECUTING) &&
 715             (walk_state->control_state->control.predicate_op == op)) {
 716                 status =
 717                     acpi_ds_get_predicate_value(walk_state,
 718                                                 walk_state->result_obj);
 719                 walk_state->result_obj = NULL;
 720         }
 721
 722       cleanup:
 723
 724         if (walk_state->result_obj) {
 725                 /* Break to debugger to display result */
 726
 727                 ACPI_DEBUGGER_EXEC(acpi_db_display_result_object
 728                                    (walk_state->result_obj, walk_state));
 729
 730                 /*
 731                  * Delete the result op if and only if:
 732                  * Parent will not use the result -- such as any
 733                  * non-nested type2 op in a method (parent will be method)
 734                  */
 735                 acpi_ds_delete_result_if_not_used(op, walk_state->result_obj,
 736                                                   walk_state);
 737         }
 738 #ifdef _UNDER_DEVELOPMENT
 739
 740         if (walk_state->parser_state.aml == walk_state->parser_state.aml_end) {
 741                 acpi_db_method_end(walk_state);
 742         }
 743 #endif
 744
 745         /* Invoke exception handler on error */
 746
 747         if (ACPI_FAILURE(status)) {
 748                 status = acpi_ds_method_error(status, walk_state);
 749         }
 750
 751         /* Always clear the object stack */
 752
 753         walk_state->num_operands = 0;
 754         return_ACPI_STATUS(status);
 755 }