kernel/drivers/acpi/acpica/exresop.c

   1 /******************************************************************************
   2  *
   3  * Module Name: exresop - AML Interpreter operand/object resolution
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2015, 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
  52 ACPI_MODULE_NAME("exresop")
  53
  54 /* Local prototypes */
  55 static acpi_status
  56 acpi_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
  73 static acpi_status
  74 acpi_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
 132 acpi_status
 133 acpi_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                          * Need an operand of type ACPI_TYPE_LOCAL_REFERENCE
 312                          * A Namespace Node is OK as-is
 313                          */
 314                         if (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) ==
 315                             ACPI_DESC_TYPE_NAMED) {
 316                                 goto next_operand;
 317                         }
 318
 319                         status =
 320                             acpi_ex_check_object_type(ACPI_TYPE_LOCAL_REFERENCE,
 321                                                       object_type, obj_desc);
 322                         if (ACPI_FAILURE(status)) {
 323                                 return_ACPI_STATUS(status);
 324                         }
 325                         goto next_operand;
 326
 327                 case ARGI_DATAREFOBJ:   /* Store operator only */
 328                         /*
 329                          * We don't want to resolve index_op reference objects during
 330                          * a store because this would be an implicit de_ref_of operation.
 331                          * Instead, we just want to store the reference object.
 332                          * -- All others must be resolved below.
 333                          */
 334                         if ((opcode == AML_STORE_OP) &&
 335                             ((*stack_ptr)->common.type ==
 336                              ACPI_TYPE_LOCAL_REFERENCE)
 337                             && ((*stack_ptr)->reference.class ==
 338                                 ACPI_REFCLASS_INDEX)) {
 339                                 goto next_operand;
 340                         }
 341                         break;
 342
 343                 default:
 344
 345                         /* All cases covered above */
 346
 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                          * Need an operand of type ACPI_TYPE_BUFFER,
 438                          * But we can implicitly convert from a STRING or INTEGER
 439                          * aka - "Implicit Source Operand Conversion"
 440                          */
 441                         status = acpi_ex_convert_to_buffer(obj_desc, stack_ptr);
 442                         if (ACPI_FAILURE(status)) {
 443                                 if (status == AE_TYPE) {
 444                                         ACPI_ERROR((AE_INFO,
 445                                                     "Needed [Integer/String/Buffer], found [%s] %p",
 446                                                     acpi_ut_get_object_type_name
 447                                                     (obj_desc), obj_desc));
 448
 449                                         return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 450                                 }
 451
 452                                 return_ACPI_STATUS(status);
 453                         }
 454
 455                         if (obj_desc != *stack_ptr) {
 456                                 acpi_ut_remove_reference(obj_desc);
 457                         }
 458                         goto next_operand;
 459
 460                 case ARGI_STRING:
 461                         /*
 462                          * Need an operand of type ACPI_TYPE_STRING,
 463                          * But we can implicitly convert from a BUFFER or INTEGER
 464                          * aka - "Implicit Source Operand Conversion"
 465                          */
 466                         status = acpi_ex_convert_to_string(obj_desc, stack_ptr,
 467                                                            ACPI_IMPLICIT_CONVERT_HEX);
 468                         if (ACPI_FAILURE(status)) {
 469                                 if (status == AE_TYPE) {
 470                                         ACPI_ERROR((AE_INFO,
 471                                                     "Needed [Integer/String/Buffer], found [%s] %p",
 472                                                     acpi_ut_get_object_type_name
 473                                                     (obj_desc), obj_desc));
 474
 475                                         return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 476                                 }
 477
 478                                 return_ACPI_STATUS(status);
 479                         }
 480
 481                         if (obj_desc != *stack_ptr) {
 482                                 acpi_ut_remove_reference(obj_desc);
 483                         }
 484                         goto next_operand;
 485
 486                 case ARGI_COMPUTEDATA:
 487
 488                         /* Need an operand of type INTEGER, STRING or BUFFER */
 489
 490                         switch (obj_desc->common.type) {
 491                         case ACPI_TYPE_INTEGER:
 492                         case ACPI_TYPE_STRING:
 493                         case ACPI_TYPE_BUFFER:
 494
 495                                 /* Valid operand */
 496                                 break;
 497
 498                         default:
 499                                 ACPI_ERROR((AE_INFO,
 500                                             "Needed [Integer/String/Buffer], found [%s] %p",
 501                                             acpi_ut_get_object_type_name
 502                                             (obj_desc), obj_desc));
 503
 504                                 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 505                         }
 506                         goto next_operand;
 507
 508                 case ARGI_BUFFER_OR_STRING:
 509
 510                         /* Need an operand of type STRING or BUFFER */
 511
 512                         switch (obj_desc->common.type) {
 513                         case ACPI_TYPE_STRING:
 514                         case ACPI_TYPE_BUFFER:
 515
 516                                 /* Valid operand */
 517                                 break;
 518
 519                         case ACPI_TYPE_INTEGER:
 520
 521                                 /* Highest priority conversion is to type Buffer */
 522
 523                                 status =
 524                                     acpi_ex_convert_to_buffer(obj_desc,
 525                                                               stack_ptr);
 526                                 if (ACPI_FAILURE(status)) {
 527                                         return_ACPI_STATUS(status);
 528                                 }
 529
 530                                 if (obj_desc != *stack_ptr) {
 531                                         acpi_ut_remove_reference(obj_desc);
 532                                 }
 533                                 break;
 534
 535                         default:
 536                                 ACPI_ERROR((AE_INFO,
 537                                             "Needed [Integer/String/Buffer], found [%s] %p",
 538                                             acpi_ut_get_object_type_name
 539                                             (obj_desc), obj_desc));
 540
 541                                 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 542                         }
 543                         goto next_operand;
 544
 545                 case ARGI_DATAOBJECT:
 546                         /*
 547                          * ARGI_DATAOBJECT is only used by the size_of operator.
 548                          * Need a buffer, string, package, or ref_of reference.
 549                          *
 550                          * The only reference allowed here is a direct reference to
 551                          * a namespace node.
 552                          */
 553                         switch (obj_desc->common.type) {
 554                         case ACPI_TYPE_PACKAGE:
 555                         case ACPI_TYPE_STRING:
 556                         case ACPI_TYPE_BUFFER:
 557                         case ACPI_TYPE_LOCAL_REFERENCE:
 558
 559                                 /* Valid operand */
 560                                 break;
 561
 562                         default:
 563
 564                                 ACPI_ERROR((AE_INFO,
 565                                             "Needed [Buffer/String/Package/Reference], found [%s] %p",
 566                                             acpi_ut_get_object_type_name
 567                                             (obj_desc), obj_desc));
 568
 569                                 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 570                         }
 571                         goto next_operand;
 572
 573                 case ARGI_COMPLEXOBJ:
 574
 575                         /* Need a buffer or package or (ACPI 2.0) String */
 576
 577                         switch (obj_desc->common.type) {
 578                         case ACPI_TYPE_PACKAGE:
 579                         case ACPI_TYPE_STRING:
 580                         case ACPI_TYPE_BUFFER:
 581
 582                                 /* Valid operand */
 583                                 break;
 584
 585                         default:
 586
 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
 609                                 ACPI_ERROR((AE_INFO,
 610                                             "Needed [Region/Buffer], found [%s] %p",
 611                                             acpi_ut_get_object_type_name
 612                                             (obj_desc), obj_desc));
 613
 614                                 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 615                         }
 616                         goto next_operand;
 617
 618                 case ARGI_DATAREFOBJ:
 619
 620                         /* Used by the Store() operator only */
 621
 622                         switch (obj_desc->common.type) {
 623                         case ACPI_TYPE_INTEGER:
 624                         case ACPI_TYPE_PACKAGE:
 625                         case ACPI_TYPE_STRING:
 626                         case ACPI_TYPE_BUFFER:
 627                         case ACPI_TYPE_BUFFER_FIELD:
 628                         case ACPI_TYPE_LOCAL_REFERENCE:
 629                         case ACPI_TYPE_LOCAL_REGION_FIELD:
 630                         case ACPI_TYPE_LOCAL_BANK_FIELD:
 631                         case ACPI_TYPE_LOCAL_INDEX_FIELD:
 632                         case ACPI_TYPE_DDB_HANDLE:
 633
 634                                 /* Valid operand */
 635                                 break;
 636
 637                         default:
 638
 639                                 if (acpi_gbl_enable_interpreter_slack) {
 640                                         /*
 641                                          * Enable original behavior of Store(), allowing any and all
 642                                          * objects as the source operand. The ACPI spec does not
 643                                          * allow this, however.
 644                                          */
 645                                         break;
 646                                 }
 647
 648                                 if (target_op == AML_DEBUG_OP) {
 649
 650                                         /* Allow store of any object to the Debug object */
 651
 652                                         break;
 653                                 }
 654
 655                                 ACPI_ERROR((AE_INFO,
 656                                             "Needed Integer/Buffer/String/Package/Ref/Ddb], found [%s] %p",
 657                                             acpi_ut_get_object_type_name
 658                                             (obj_desc), obj_desc));
 659
 660                                 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
 661                         }
 662                         goto next_operand;
 663
 664                 default:
 665
 666                         /* Unknown type */
 667
 668                         ACPI_ERROR((AE_INFO,
 669                                     "Internal - Unknown ARGI (required operand) type 0x%X",
 670                                     this_arg_type));
 671
 672                         return_ACPI_STATUS(AE_BAD_PARAMETER);
 673                 }
 674
 675                 /*
 676                  * Make sure that the original object was resolved to the
 677                  * required object type (Simple cases only).
 678                  */
 679                 status = acpi_ex_check_object_type(type_needed,
 680                                                    (*stack_ptr)->common.type,
 681                                                    *stack_ptr);
 682                 if (ACPI_FAILURE(status)) {
 683                         return_ACPI_STATUS(status);
 684                 }
 685
 686 next_operand:
 687                 /*
 688                  * If more operands needed, decrement stack_ptr to point
 689                  * to next operand on stack
 690                  */
 691                 if (GET_CURRENT_ARG_TYPE(arg_types)) {
 692                         stack_ptr--;
 693                 }
 694         }
 695
 696         ACPI_DUMP_OPERANDS(walk_state->operands,
 697                            acpi_ps_get_opcode_name(opcode),
 698                            walk_state->num_operands);
 699
 700         return_ACPI_STATUS(status);
 701 }