LXR linux/drivers/acpi/acpica/exresop.c

   1/******************************************************************************
   2 *
   3 * Module Name: exresop - AML Interpreter operand/object resolution
   4 *
   5 *****************************************************************************/
   6
   7/*
   8 * Copyright (C) 2000 - 2013, Intel Corp.
   9 * All rights reserved.
  10 *
  11 * Redistribution and use in source and binary forms, with or without
  12 * modification, are permitted provided that the following conditions
  13 * are met:
  14 * 1. Redistributions of source code must retain the above copyright
  15 *    notice, this list of conditions, and the following disclaimer,
  16 *    without modification.
  17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18 *    substantially similar to the "NO WARRANTY" disclaimer below
  19 *    ("Disclaimer") and any redistribution must be conditioned upon
  20 *    including a substantially similar Disclaimer requirement for further
  21 *    binary redistribution.
  22 * 3. Neither the names of the above-listed copyright holders nor the names
  23 *    of any contributors may be used to endorse or promote products derived
  24 *    from this software without specific prior written permission.
  25 *
  26 * Alternatively, this software may be distributed under the terms of the
  27 * GNU General Public License ("GPL") version 2 as published by the Free
  28 * Software Foundation.
  29 *
  30 * NO WARRANTY
  31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41 * POSSIBILITY OF SUCH DAMAGES.
  42 */
  43
  44#include <acpi/acpi.h>
  45#include "accommon.h"
  46#include "amlcode.h"
  47#include "acparser.h"
  48#include "acinterp.h"
  49#include "acnamesp.h"
  50
  51#define _COMPONENT          ACPI_EXECUTER
  52ACPI_MODULE_NAME("exresop")
  53
  54/* Local prototypes */
  55static acpi_status
  56acpi_ex_check_object_type(acpi_object_type type_needed,
  57                          acpi_object_type this_type, void *object);
  58
  59/*******************************************************************************
  60 *
  61 * FUNCTION:    acpi_ex_check_object_type
  62 *
  63 * PARAMETERS:  type_needed         Object type needed
  64 *              this_type           Actual object type
  65 *              Object              Object pointer
  66 *
  67 * RETURN:      Status
  68 *
  69 * DESCRIPTION: Check required type against actual type
  70 *
  71 ******************************************************************************/
  72
  73static acpi_status
  74acpi_ex_check_object_type(acpi_object_type type_needed,
  75                          acpi_object_type this_type, void *object)
  76{
  77        ACPI_FUNCTION_ENTRY();
  78
  79        if (type_needed == ACPI_TYPE_ANY) {
  80
  81                /* All types OK, so we don't perform any typechecks */
  82
  83                return (AE_OK);
  84        }
  85
  86        if (type_needed == ACPI_TYPE_LOCAL_REFERENCE) {
  87                /*
  88                 * Allow the AML "Constant" opcodes (Zero, One, etc.) to be reference
  89                 * objects and thus allow them to be targets. (As per the ACPI
  90                 * specification, a store to a constant is a noop.)
  91                 */
  92                if ((this_type == ACPI_TYPE_INTEGER) &&
  93                    (((union acpi_operand_object *)object)->common.
  94                     flags & AOPOBJ_AML_CONSTANT)) {
  95                        return (AE_OK);
  96                }
  97        }
  98
  99        if (type_needed != this_type) {
 100                ACPI_ERROR((AE_INFO,
 101                            "Needed type [%s], found [%s] %p",
 102                            acpi_ut_get_type_name(type_needed),
 103                            acpi_ut_get_type_name(this_type), object));
 104
 105                return (AE_AML_OPERAND_TYPE);
 106        }
 107
 108        return (AE_OK);
 109}
 110
 111/*******************************************************************************
 112 *
 113 * FUNCTION:    acpi_ex_resolve_operands
 114 *
 115 * PARAMETERS:  opcode              - Opcode being interpreted
 116 *              stack_ptr           - Pointer to the operand stack to be
 117 *                                    resolved
 118 *              walk_state          - Current state
 119 *
 120 * RETURN:      Status
 121 *
 122 * DESCRIPTION: Convert multiple input operands to the types required by the
 123 *              target operator.
 124 *
 125 *      Each 5-bit group in arg_types represents one required
 126 *      operand and indicates the required Type. The corresponding operand
 127 *      will be converted to the required type if possible, otherwise we
 128 *      abort with an exception.
 129 *
 130 ******************************************************************************/
 131
 132acpi_status
 133acpi_ex_resolve_operands(u16 opcode,
 134                         union acpi_operand_object ** stack_ptr,
 135                         struct acpi_walk_state * walk_state)
 136{
 137        union acpi_operand_object *obj_desc;
 138        acpi_status status = AE_OK;
 139        u8 object_type;
 140        u32 arg_types;
 141        const struct acpi_opcode_info *op_info;
 142        u32 this_arg_type;
 143        acpi_object_type type_needed;
 144        u16 target_op = 0;
 145
 146        ACPI_FUNCTION_TRACE_U32(ex_resolve_operands, opcode);
 147
 148        op_info = acpi_ps_get_opcode_info(opcode);
 149        if (op_info->class == AML_CLASS_UNKNOWN) {
 150                return_ACPI_STATUS(AE_AML_BAD_OPCODE);
 151        }
 152
 153        arg_types = op_info->runtime_args;
 154        if (arg_types == ARGI_INVALID_OPCODE) {
 155                ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X", opcode));
 156
 157                return_ACPI_STATUS(AE_AML_INTERNAL);
 158        }
 159
 160        ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 161                          "Opcode %X [%s] RequiredOperandTypes=%8.8X\n",
 162                          opcode, op_info->name, arg_types));
 163
 164        /*
 165         * Normal exit is with (arg_types == 0) at end of argument list.
 166         * Function will return an exception from within the loop upon
 167         * finding an entry which is not (or cannot be converted
 168         * to) the required type; if stack underflows; or upon
 169         * finding a NULL stack entry (which should not happen).
 170         */
 171        while (GET_CURRENT_ARG_TYPE(arg_types)) {
 172                if (!stack_ptr || !*stack_ptr) {
 173                        ACPI_ERROR((AE_INFO, "Null stack entry at %p",
 174                                    stack_ptr));
 175
 176                        return_ACPI_STATUS(AE_AML_INTERNAL);
 177                }
 178
 179                /* Extract useful items */
 180
 181                obj_desc = *stack_ptr;
 182
 183                /* Decode the descriptor type */
 184
 185                switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) {
 186                case ACPI_DESC_TYPE_NAMED:
 187
 188                        /* Namespace Node */
 189
 190                        object_type =
 191                            ((struct acpi_namespace_node *)obj_desc)->type;
 192
 193                        /*
 194                         * Resolve an alias object. The construction of these objects
 195                         * guarantees that there is only one level of alias indirection;
 196                         * thus, the attached object is always the aliased namespace node
 197                         */
 198                        if (object_type == ACPI_TYPE_LOCAL_ALIAS) {
 199                                obj_desc =
 200                                    acpi_ns_get_attached_object((struct
 201                                                                 acpi_namespace_node
 202                                                                 *)obj_desc);
 203                                *stack_ptr = obj_desc;
 204                                object_type =
 205                                    ((struct acpi_namespace_node *)obj_desc)->
 206                                    type;
 207                        }
 208                        break;
 209
 210                case ACPI_DESC_TYPE_OPERAND:
 211
 212                        /* ACPI internal object */
 213
 214                        object_type = obj_desc->common.type;
 215
 216                        /* Check for bad acpi_object_type */
 217
 218                        if (!acpi_ut_valid_object_type(object_type)) {
 219                                ACPI_ERROR((AE_INFO,
 220                                            "Bad operand object type [0x%X]",
 221                                            object_type));
 222
 223                                return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 224                        }
 225
 226                        if (object_type == (u8) ACPI_TYPE_LOCAL_REFERENCE) {
 227
 228                                /* Validate the Reference */
 229
 230                                switch (obj_desc->reference.class) {
 231                                case ACPI_REFCLASS_DEBUG:
 232
 233                                        target_op = AML_DEBUG_OP;
 234
 235                                        /*lint -fallthrough */
 236
 237                                case ACPI_REFCLASS_ARG:
 238                                case ACPI_REFCLASS_LOCAL:
 239                                case ACPI_REFCLASS_INDEX:
 240                                case ACPI_REFCLASS_REFOF:
 241                                case ACPI_REFCLASS_TABLE:       /* ddb_handle from LOAD_OP or LOAD_TABLE_OP */
 242                                case ACPI_REFCLASS_NAME:        /* Reference to a named object */
 243
 244                                        ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 245                                                          "Operand is a Reference, Class [%s] %2.2X\n",
 246                                                          acpi_ut_get_reference_name
 247                                                          (obj_desc),
 248                                                          obj_desc->reference.
 249                                                          class));
 250                                        break;
 251
 252                                default:
 253
 254                                        ACPI_ERROR((AE_INFO,
 255                                                    "Unknown Reference Class 0x%2.2X in %p",
 256                                                    obj_desc->reference.class,
 257                                                    obj_desc));
 258
 259                                        return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 260                                }
 261                        }
 262                        break;
 263
 264                default:
 265
 266                        /* Invalid descriptor */
 267
 268                        ACPI_ERROR((AE_INFO, "Invalid descriptor %p [%s]",
 269                                    obj_desc,
 270                                    acpi_ut_get_descriptor_name(obj_desc)));
 271
 272                        return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 273                }
 274
 275                /* Get one argument type, point to the next */
 276
 277                this_arg_type = GET_CURRENT_ARG_TYPE(arg_types);
 278                INCREMENT_ARG_LIST(arg_types);
 279
 280                /*
 281                 * Handle cases where the object does not need to be
 282                 * resolved to a value
 283                 */
 284                switch (this_arg_type) {
 285                case ARGI_REF_OR_STRING:        /* Can be a String or Reference */
 286
 287                        if ((ACPI_GET_DESCRIPTOR_TYPE(obj_desc) ==
 288                             ACPI_DESC_TYPE_OPERAND)
 289                            && (obj_desc->common.type == ACPI_TYPE_STRING)) {
 290                                /*
 291                                 * String found - the string references a named object and
 292                                 * must be resolved to a node
 293                                 */
 294                                goto next_operand;
 295                        }
 296
 297                        /*
 298                         * Else not a string - fall through to the normal Reference
 299                         * case below
 300                         */
 301                        /*lint -fallthrough */
 302
 303                case ARGI_REFERENCE:    /* References: */
 304                case ARGI_INTEGER_REF:
 305                case ARGI_OBJECT_REF:
 306                case ARGI_DEVICE_REF:
 307                case ARGI_TARGETREF:    /* Allows implicit conversion rules before store */
 308                case ARGI_FIXED_TARGET: /* No implicit conversion before store to target */
 309                case ARGI_SIMPLE_TARGET:        /* Name, Local, or arg - no implicit conversion  */
 310
 311                        /*
 312                         * Need an operand of type ACPI_TYPE_LOCAL_REFERENCE
 313                         * A Namespace Node is OK as-is
 314                         */
 315                        if (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) ==
 316                            ACPI_DESC_TYPE_NAMED) {
 317                                goto next_operand;
 318                        }
 319
 320                        status =
 321                            acpi_ex_check_object_type(ACPI_TYPE_LOCAL_REFERENCE,
 322                                                      object_type, obj_desc);
 323                        if (ACPI_FAILURE(status)) {
 324                                return_ACPI_STATUS(status);
 325                        }
 326                        goto next_operand;
 327
 328                case ARGI_DATAREFOBJ:   /* Store operator only */
 329
 330                        /*
 331                         * We don't want to resolve index_op reference objects during
 332                         * a store because this would be an implicit de_ref_of operation.
 333                         * Instead, we just want to store the reference object.
 334                         * -- All others must be resolved below.
 335                         */
 336                        if ((opcode == AML_STORE_OP) &&
 337                            ((*stack_ptr)->common.type ==
 338                             ACPI_TYPE_LOCAL_REFERENCE)
 339                            && ((*stack_ptr)->reference.class ==
 340                                ACPI_REFCLASS_INDEX)) {
 341                                goto next_operand;
 342                        }
 343                        break;
 344
 345                default:
 346                        /* All cases covered above */
 347                        break;
 348                }
 349
 350                /*
 351                 * Resolve this object to a value
 352                 */
 353                status = acpi_ex_resolve_to_value(stack_ptr, walk_state);
 354                if (ACPI_FAILURE(status)) {
 355                        return_ACPI_STATUS(status);
 356                }
 357
 358                /* Get the resolved object */
 359
 360                obj_desc = *stack_ptr;
 361
 362                /*
 363                 * Check the resulting object (value) type
 364                 */
 365                switch (this_arg_type) {
 366                        /*
 367                         * For the simple cases, only one type of resolved object
 368                         * is allowed
 369                         */
 370                case ARGI_MUTEX:
 371
 372                        /* Need an operand of type ACPI_TYPE_MUTEX */
 373
 374                        type_needed = ACPI_TYPE_MUTEX;
 375                        break;
 376
 377                case ARGI_EVENT:
 378
 379                        /* Need an operand of type ACPI_TYPE_EVENT */
 380
 381                        type_needed = ACPI_TYPE_EVENT;
 382                        break;
 383
 384                case ARGI_PACKAGE:      /* Package */
 385
 386                        /* Need an operand of type ACPI_TYPE_PACKAGE */
 387
 388                        type_needed = ACPI_TYPE_PACKAGE;
 389                        break;
 390
 391                case ARGI_ANYTYPE:
 392
 393                        /* Any operand type will do */
 394
 395                        type_needed = ACPI_TYPE_ANY;
 396                        break;
 397
 398                case ARGI_DDBHANDLE:
 399
 400                        /* Need an operand of type ACPI_TYPE_DDB_HANDLE */
 401
 402                        type_needed = ACPI_TYPE_LOCAL_REFERENCE;
 403                        break;
 404
 405                        /*
 406                         * The more complex cases allow multiple resolved object types
 407                         */
 408                case ARGI_INTEGER:
 409
 410                        /*
 411                         * Need an operand of type ACPI_TYPE_INTEGER,
 412                         * But we can implicitly convert from a STRING or BUFFER
 413                         * aka - "Implicit Source Operand Conversion"
 414                         */
 415                        status =
 416                            acpi_ex_convert_to_integer(obj_desc, stack_ptr, 16);
 417                        if (ACPI_FAILURE(status)) {
 418                                if (status == AE_TYPE) {
 419                                        ACPI_ERROR((AE_INFO,
 420                                                    "Needed [Integer/String/Buffer], found [%s] %p",
 421                                                    acpi_ut_get_object_type_name
 422                                                    (obj_desc), obj_desc));
 423
 424                                        return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 425                                }
 426
 427                                return_ACPI_STATUS(status);
 428                        }
 429
 430                        if (obj_desc != *stack_ptr) {
 431                                acpi_ut_remove_reference(obj_desc);
 432                        }
 433                        goto next_operand;
 434
 435                case ARGI_BUFFER:
 436
 437                        /*
 438                         * Need an operand of type ACPI_TYPE_BUFFER,
 439                         * But we can implicitly convert from a STRING or INTEGER
 440                         * aka - "Implicit Source Operand Conversion"
 441                         */
 442                        status = acpi_ex_convert_to_buffer(obj_desc, stack_ptr);
 443                        if (ACPI_FAILURE(status)) {
 444                                if (status == AE_TYPE) {
 445                                        ACPI_ERROR((AE_INFO,
 446                                                    "Needed [Integer/String/Buffer], found [%s] %p",
 447                                                    acpi_ut_get_object_type_name
 448                                                    (obj_desc), obj_desc));
 449
 450                                        return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 451                                }
 452
 453                                return_ACPI_STATUS(status);
 454                        }
 455
 456                        if (obj_desc != *stack_ptr) {
 457                                acpi_ut_remove_reference(obj_desc);
 458                        }
 459                        goto next_operand;
 460
 461                case ARGI_STRING:
 462
 463                        /*
 464                         * Need an operand of type ACPI_TYPE_STRING,
 465                         * But we can implicitly convert from a BUFFER or INTEGER
 466                         * aka - "Implicit Source Operand Conversion"
 467                         */
 468                        status = acpi_ex_convert_to_string(obj_desc, stack_ptr,
 469                                                           ACPI_IMPLICIT_CONVERT_HEX);
 470                        if (ACPI_FAILURE(status)) {
 471                                if (status == AE_TYPE) {
 472                                        ACPI_ERROR((AE_INFO,
 473                                                    "Needed [Integer/String/Buffer], found [%s] %p",
 474                                                    acpi_ut_get_object_type_name
 475                                                    (obj_desc), obj_desc));
 476
 477                                        return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 478                                }
 479
 480                                return_ACPI_STATUS(status);
 481                        }
 482
 483                        if (obj_desc != *stack_ptr) {
 484                                acpi_ut_remove_reference(obj_desc);
 485                        }
 486                        goto next_operand;
 487
 488                case ARGI_COMPUTEDATA:
 489
 490                        /* Need an operand of type INTEGER, STRING or BUFFER */
 491
 492                        switch (obj_desc->common.type) {
 493                        case ACPI_TYPE_INTEGER:
 494                        case ACPI_TYPE_STRING:
 495                        case ACPI_TYPE_BUFFER:
 496
 497                                /* Valid operand */
 498                                break;
 499
 500                        default:
 501                                ACPI_ERROR((AE_INFO,
 502                                            "Needed [Integer/String/Buffer], found [%s] %p",
 503                                            acpi_ut_get_object_type_name
 504                                            (obj_desc), obj_desc));
 505
 506                                return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 507                        }
 508                        goto next_operand;
 509
 510                case ARGI_BUFFER_OR_STRING:
 511
 512                        /* Need an operand of type STRING or BUFFER */
 513
 514                        switch (obj_desc->common.type) {
 515                        case ACPI_TYPE_STRING:
 516                        case ACPI_TYPE_BUFFER:
 517
 518                                /* Valid operand */
 519                                break;
 520
 521                        case ACPI_TYPE_INTEGER:
 522
 523                                /* Highest priority conversion is to type Buffer */
 524
 525                                status =
 526                                    acpi_ex_convert_to_buffer(obj_desc,
 527                                                              stack_ptr);
 528                                if (ACPI_FAILURE(status)) {
 529                                        return_ACPI_STATUS(status);
 530                                }
 531
 532                                if (obj_desc != *stack_ptr) {
 533                                        acpi_ut_remove_reference(obj_desc);
 534                                }
 535                                break;
 536
 537                        default:
 538                                ACPI_ERROR((AE_INFO,
 539                                            "Needed [Integer/String/Buffer], found [%s] %p",
 540                                            acpi_ut_get_object_type_name
 541                                            (obj_desc), obj_desc));
 542
 543                                return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 544                        }
 545                        goto next_operand;
 546
 547                case ARGI_DATAOBJECT:
 548                        /*
 549                         * ARGI_DATAOBJECT is only used by the size_of operator.
 550                         * Need a buffer, string, package, or ref_of reference.
 551                         *
 552                         * The only reference allowed here is a direct reference to
 553                         * a namespace node.
 554                         */
 555                        switch (obj_desc->common.type) {
 556                        case ACPI_TYPE_PACKAGE:
 557                        case ACPI_TYPE_STRING:
 558                        case ACPI_TYPE_BUFFER:
 559                        case ACPI_TYPE_LOCAL_REFERENCE:
 560
 561                                /* Valid operand */
 562                                break;
 563
 564                        default:
 565                                ACPI_ERROR((AE_INFO,
 566                                            "Needed [Buffer/String/Package/Reference], found [%s] %p",
 567                                            acpi_ut_get_object_type_name
 568                                            (obj_desc), obj_desc));
 569
 570                                return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 571                        }
 572                        goto next_operand;
 573
 574                case ARGI_COMPLEXOBJ:
 575
 576                        /* Need a buffer or package or (ACPI 2.0) String */
 577
 578                        switch (obj_desc->common.type) {
 579                        case ACPI_TYPE_PACKAGE:
 580                        case ACPI_TYPE_STRING:
 581                        case ACPI_TYPE_BUFFER:
 582
 583                                /* Valid operand */
 584                                break;
 585
 586                        default:
 587                                ACPI_ERROR((AE_INFO,
 588                                            "Needed [Buffer/String/Package], found [%s] %p",
 589                                            acpi_ut_get_object_type_name
 590                                            (obj_desc), obj_desc));
 591
 592                                return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 593                        }
 594                        goto next_operand;
 595
 596                case ARGI_REGION_OR_BUFFER:     /* Used by Load() only */
 597
 598                        /* Need an operand of type REGION or a BUFFER (which could be a resolved region field) */
 599
 600                        switch (obj_desc->common.type) {
 601                        case ACPI_TYPE_BUFFER:
 602                        case ACPI_TYPE_REGION:
 603
 604                                /* Valid operand */
 605                                break;
 606
 607                        default:
 608                                ACPI_ERROR((AE_INFO,
 609                                            "Needed [Region/Buffer], found [%s] %p",
 610                                            acpi_ut_get_object_type_name
 611                                            (obj_desc), obj_desc));
 612
 613                                return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 614                        }
 615                        goto next_operand;
 616
 617                case ARGI_DATAREFOBJ:
 618
 619                        /* Used by the Store() operator only */
 620
 621                        switch (obj_desc->common.type) {
 622                        case ACPI_TYPE_INTEGER:
 623                        case ACPI_TYPE_PACKAGE:
 624                        case ACPI_TYPE_STRING:
 625                        case ACPI_TYPE_BUFFER:
 626                        case ACPI_TYPE_BUFFER_FIELD:
 627                        case ACPI_TYPE_LOCAL_REFERENCE:
 628                        case ACPI_TYPE_LOCAL_REGION_FIELD:
 629                        case ACPI_TYPE_LOCAL_BANK_FIELD:
 630                        case ACPI_TYPE_LOCAL_INDEX_FIELD:
 631                        case ACPI_TYPE_DDB_HANDLE:
 632
 633                                /* Valid operand */
 634                                break;
 635
 636                        default:
 637
 638                                if (acpi_gbl_enable_interpreter_slack) {
 639                                        /*
 640                                         * Enable original behavior of Store(), allowing any and all
 641                                         * objects as the source operand. The ACPI spec does not
 642                                         * allow this, however.
 643                                         */
 644                                        break;
 645                                }
 646
 647                                if (target_op == AML_DEBUG_OP) {
 648
 649                                        /* Allow store of any object to the Debug object */
 650
 651                                        break;
 652                                }
 653
 654                                ACPI_ERROR((AE_INFO,
 655                                            "Needed Integer/Buffer/String/Package/Ref/Ddb], found [%s] %p",
 656                                            acpi_ut_get_object_type_name
 657                                            (obj_desc), obj_desc));
 658
 659                                return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 660                        }
 661                        goto next_operand;
 662
 663                default:
 664
 665                        /* Unknown type */
 666
 667                        ACPI_ERROR((AE_INFO,
 668                                    "Internal - Unknown ARGI (required operand) type 0x%X",
 669                                    this_arg_type));
 670
 671                        return_ACPI_STATUS(AE_BAD_PARAMETER);
 672                }
 673
 674                /*
 675                 * Make sure that the original object was resolved to the
 676                 * required object type (Simple cases only).
 677                 */
 678                status = acpi_ex_check_object_type(type_needed,
 679                                                   (*stack_ptr)->common.type,
 680                                                   *stack_ptr);
 681                if (ACPI_FAILURE(status)) {
 682                        return_ACPI_STATUS(status);
 683                }
 684
 685              next_operand:
 686                /*
 687                 * If more operands needed, decrement stack_ptr to point
 688                 * to next operand on stack
 689                 */
 690                if (GET_CURRENT_ARG_TYPE(arg_types)) {
 691                        stack_ptr--;
 692                }
 693        }
 694
 695        ACPI_DUMP_OPERANDS(walk_state->operands,
 696                           acpi_ps_get_opcode_name(opcode),
 697                           walk_state->num_operands);
 698
 699        return_ACPI_STATUS(status);
 700}
 701