drivers/acpi/acpica/exoparg2.c

   1 /******************************************************************************
   2  *
   3  * Module Name: exoparg2 - AML execution - opcodes with 2 arguments
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2011, 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 "acparser.h"
  47 #include "acinterp.h"
  48 #include "acevents.h"
  49 #include "amlcode.h"
  50
  51 #define _COMPONENT          ACPI_EXECUTER
  52 ACPI_MODULE_NAME("exoparg2")
  53
  54 /*!
  55  * Naming convention for AML interpreter execution routines.
  56  *
  57  * The routines that begin execution of AML opcodes are named with a common
  58  * convention based upon the number of arguments, the number of target operands,
  59  * and whether or not a value is returned:
  60  *
  61  *      AcpiExOpcode_xA_yT_zR
  62  *
  63  * Where:
  64  *
  65  * xA - ARGUMENTS:    The number of arguments (input operands) that are
  66  *                    required for this opcode type (1 through 6 args).
  67  * yT - TARGETS:      The number of targets (output operands) that are required
  68  *                    for this opcode type (0, 1, or 2 targets).
  69  * zR - RETURN VALUE: Indicates whether this opcode type returns a value
  70  *                    as the function return (0 or 1).
  71  *
  72  * The AcpiExOpcode* functions are called via the Dispatcher component with
  73  * fully resolved operands.
  74 !*/
  75 /*******************************************************************************
  76  *
  77  * FUNCTION:    acpi_ex_opcode_2A_0T_0R
  78  *
  79  * PARAMETERS:  walk_state          - Current walk state
  80  *
  81  * RETURN:      Status
  82  *
  83  * DESCRIPTION: Execute opcode with two arguments, no target, and no return
  84  *              value.
  85  *
  86  * ALLOCATION:  Deletes both operands
  87  *
  88  ******************************************************************************/
  89 acpi_status acpi_ex_opcode_2A_0T_0R(struct acpi_walk_state *walk_state)
  90 {
  91         union acpi_operand_object **operand = &walk_state->operands[0];
  92         struct acpi_namespace_node *node;
  93         u32 value;
  94         acpi_status status = AE_OK;
  95
  96         ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_0T_0R,
  97                                 acpi_ps_get_opcode_name(walk_state->opcode));
  98
  99         /* Examine the opcode */
 100
 101         switch (walk_state->opcode) {
 102         case AML_NOTIFY_OP:     /* Notify (notify_object, notify_value) */
 103
 104                 /* The first operand is a namespace node */
 105
 106                 node = (struct acpi_namespace_node *)operand[0];
 107
 108                 /* Second value is the notify value */
 109
 110                 value = (u32) operand[1]->integer.value;
 111
 112                 /* Are notifies allowed on this object? */
 113
 114                 if (!acpi_ev_is_notify_object(node)) {
 115                         ACPI_ERROR((AE_INFO,
 116                                     "Unexpected notify object type [%s]",
 117                                     acpi_ut_get_type_name(node->type)));
 118
 119                         status = AE_AML_OPERAND_TYPE;
 120                         break;
 121                 }
 122
 123                 /*
 124                  * Dispatch the notify to the appropriate handler
 125                  * NOTE: the request is queued for execution after this method
 126                  * completes.  The notify handlers are NOT invoked synchronously
 127                  * from this thread -- because handlers may in turn run other
 128                  * control methods.
 129                  */
 130                 status = acpi_ev_queue_notify_request(node, value);
 131                 break;
 132
 133         default:
 134
 135                 ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
 136                             walk_state->opcode));
 137                 status = AE_AML_BAD_OPCODE;
 138         }
 139
 140         return_ACPI_STATUS(status);
 141 }
 142
 143 /*******************************************************************************
 144  *
 145  * FUNCTION:    acpi_ex_opcode_2A_2T_1R
 146  *
 147  * PARAMETERS:  walk_state          - Current walk state
 148  *
 149  * RETURN:      Status
 150  *
 151  * DESCRIPTION: Execute a dyadic operator (2 operands) with 2 output targets
 152  *              and one implicit return value.
 153  *
 154  ******************************************************************************/
 155
 156 acpi_status acpi_ex_opcode_2A_2T_1R(struct acpi_walk_state *walk_state)
 157 {
 158         union acpi_operand_object **operand = &walk_state->operands[0];
 159         union acpi_operand_object *return_desc1 = NULL;
 160         union acpi_operand_object *return_desc2 = NULL;
 161         acpi_status status;
 162
 163         ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_2T_1R,
 164                                 acpi_ps_get_opcode_name(walk_state->opcode));
 165
 166         /* Execute the opcode */
 167
 168         switch (walk_state->opcode) {
 169         case AML_DIVIDE_OP:
 170
 171                 /* Divide (Dividend, Divisor, remainder_result quotient_result) */
 172
 173                 return_desc1 =
 174                     acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
 175                 if (!return_desc1) {
 176                         status = AE_NO_MEMORY;
 177                         goto cleanup;
 178                 }
 179
 180                 return_desc2 =
 181                     acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
 182                 if (!return_desc2) {
 183                         status = AE_NO_MEMORY;
 184                         goto cleanup;
 185                 }
 186
 187                 /* Quotient to return_desc1, remainder to return_desc2 */
 188
 189                 status = acpi_ut_divide(operand[0]->integer.value,
 190                                         operand[1]->integer.value,
 191                                         &return_desc1->integer.value,
 192                                         &return_desc2->integer.value);
 193                 if (ACPI_FAILURE(status)) {
 194                         goto cleanup;
 195                 }
 196                 break;
 197
 198         default:
 199
 200                 ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
 201                             walk_state->opcode));
 202                 status = AE_AML_BAD_OPCODE;
 203                 goto cleanup;
 204         }
 205
 206         /* Store the results to the target reference operands */
 207
 208         status = acpi_ex_store(return_desc2, operand[2], walk_state);
 209         if (ACPI_FAILURE(status)) {
 210                 goto cleanup;
 211         }
 212
 213         status = acpi_ex_store(return_desc1, operand[3], walk_state);
 214         if (ACPI_FAILURE(status)) {
 215                 goto cleanup;
 216         }
 217
 218       cleanup:
 219         /*
 220          * Since the remainder is not returned indirectly, remove a reference to
 221          * it. Only the quotient is returned indirectly.
 222          */
 223         acpi_ut_remove_reference(return_desc2);
 224
 225         if (ACPI_FAILURE(status)) {
 226
 227                 /* Delete the return object */
 228
 229                 acpi_ut_remove_reference(return_desc1);
 230         }
 231
 232         /* Save return object (the remainder) on success */
 233
 234         else {
 235                 walk_state->result_obj = return_desc1;
 236         }
 237
 238         return_ACPI_STATUS(status);
 239 }
 240
 241 /*******************************************************************************
 242  *
 243  * FUNCTION:    acpi_ex_opcode_2A_1T_1R
 244  *
 245  * PARAMETERS:  walk_state          - Current walk state
 246  *
 247  * RETURN:      Status
 248  *
 249  * DESCRIPTION: Execute opcode with two arguments, one target, and a return
 250  *              value.
 251  *
 252  ******************************************************************************/
 253
 254 acpi_status acpi_ex_opcode_2A_1T_1R(struct acpi_walk_state *walk_state)
 255 {
 256         union acpi_operand_object **operand = &walk_state->operands[0];
 257         union acpi_operand_object *return_desc = NULL;
 258         u64 index;
 259         acpi_status status = AE_OK;
 260         acpi_size length;
 261
 262         ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_1T_1R,
 263                                 acpi_ps_get_opcode_name(walk_state->opcode));
 264
 265         /* Execute the opcode */
 266
 267         if (walk_state->op_info->flags & AML_MATH) {
 268
 269                 /* All simple math opcodes (add, etc.) */
 270
 271                 return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
 272                 if (!return_desc) {
 273                         status = AE_NO_MEMORY;
 274                         goto cleanup;
 275                 }
 276
 277                 return_desc->integer.value =
 278                     acpi_ex_do_math_op(walk_state->opcode,
 279                                        operand[0]->integer.value,
 280                                        operand[1]->integer.value);
 281                 goto store_result_to_target;
 282         }
 283
 284         switch (walk_state->opcode) {
 285         case AML_MOD_OP:        /* Mod (Dividend, Divisor, remainder_result (ACPI 2.0) */
 286
 287                 return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
 288                 if (!return_desc) {
 289                         status = AE_NO_MEMORY;
 290                         goto cleanup;
 291                 }
 292
 293                 /* return_desc will contain the remainder */
 294
 295                 status = acpi_ut_divide(operand[0]->integer.value,
 296                                         operand[1]->integer.value,
 297                                         NULL, &return_desc->integer.value);
 298                 break;
 299
 300         case AML_CONCAT_OP:     /* Concatenate (Data1, Data2, Result) */
 301
 302                 status = acpi_ex_do_concatenate(operand[0], operand[1],
 303                                                 &return_desc, walk_state);
 304                 break;
 305
 306         case AML_TO_STRING_OP:  /* to_string (Buffer, Length, Result) (ACPI 2.0) */
 307
 308                 /*
 309                  * Input object is guaranteed to be a buffer at this point (it may have
 310                  * been converted.)  Copy the raw buffer data to a new object of
 311                  * type String.
 312                  */
 313
 314                 /*
 315                  * Get the length of the new string. It is the smallest of:
 316                  * 1) Length of the input buffer
 317                  * 2) Max length as specified in the to_string operator
 318                  * 3) Length of input buffer up to a zero byte (null terminator)
 319                  *
 320                  * NOTE: A length of zero is ok, and will create a zero-length, null
 321                  *       terminated string.
 322                  */
 323                 length = 0;
 324                 while ((length < operand[0]->buffer.length) &&
 325                        (length < operand[1]->integer.value) &&
 326                        (operand[0]->buffer.pointer[length])) {
 327                         length++;
 328                 }
 329
 330                 /* Allocate a new string object */
 331
 332                 return_desc = acpi_ut_create_string_object(length);
 333                 if (!return_desc) {
 334                         status = AE_NO_MEMORY;
 335                         goto cleanup;
 336                 }
 337
 338                 /*
 339                  * Copy the raw buffer data with no transform.
 340                  * (NULL terminated already)
 341                  */
 342                 ACPI_MEMCPY(return_desc->string.pointer,
 343                             operand[0]->buffer.pointer, length);
 344                 break;
 345
 346         case AML_CONCAT_RES_OP:
 347
 348                 /* concatenate_res_template (Buffer, Buffer, Result) (ACPI 2.0) */
 349
 350                 status = acpi_ex_concat_template(operand[0], operand[1],
 351                                                  &return_desc, walk_state);
 352                 break;
 353
 354         case AML_INDEX_OP:      /* Index (Source Index Result) */
 355
 356                 /* Create the internal return object */
 357
 358                 return_desc =
 359                     acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE);
 360                 if (!return_desc) {
 361                         status = AE_NO_MEMORY;
 362                         goto cleanup;
 363                 }
 364
 365                 /* Initialize the Index reference object */
 366
 367                 index = operand[1]->integer.value;
 368                 return_desc->reference.value = (u32) index;
 369                 return_desc->reference.class = ACPI_REFCLASS_INDEX;
 370
 371                 /*
 372                  * At this point, the Source operand is a String, Buffer, or Package.
 373                  * Verify that the index is within range.
 374                  */
 375                 switch ((operand[0])->common.type) {
 376                 case ACPI_TYPE_STRING:
 377
 378                         if (index >= operand[0]->string.length) {
 379                                 status = AE_AML_STRING_LIMIT;
 380                         }
 381
 382                         return_desc->reference.target_type =
 383                             ACPI_TYPE_BUFFER_FIELD;
 384                         break;
 385
 386                 case ACPI_TYPE_BUFFER:
 387
 388                         if (index >= operand[0]->buffer.length) {
 389                                 status = AE_AML_BUFFER_LIMIT;
 390                         }
 391
 392                         return_desc->reference.target_type =
 393                             ACPI_TYPE_BUFFER_FIELD;
 394                         break;
 395
 396                 case ACPI_TYPE_PACKAGE:
 397
 398                         if (index >= operand[0]->package.count) {
 399                                 status = AE_AML_PACKAGE_LIMIT;
 400                         }
 401
 402                         return_desc->reference.target_type = ACPI_TYPE_PACKAGE;
 403                         return_desc->reference.where =
 404                             &operand[0]->package.elements[index];
 405                         break;
 406
 407                 default:
 408
 409                         status = AE_AML_INTERNAL;
 410                         goto cleanup;
 411                 }
 412
 413                 /* Failure means that the Index was beyond the end of the object */
 414
 415                 if (ACPI_FAILURE(status)) {
 416                         ACPI_EXCEPTION((AE_INFO, status,
 417                                         "Index (0x%8.8X%8.8X) is beyond end of object",
 418                                         ACPI_FORMAT_UINT64(index)));
 419                         goto cleanup;
 420                 }
 421
 422                 /*
 423                  * Save the target object and add a reference to it for the life
 424                  * of the index
 425                  */
 426                 return_desc->reference.object = operand[0];
 427                 acpi_ut_add_reference(operand[0]);
 428
 429                 /* Store the reference to the Target */
 430
 431                 status = acpi_ex_store(return_desc, operand[2], walk_state);
 432
 433                 /* Return the reference */
 434
 435                 walk_state->result_obj = return_desc;
 436                 goto cleanup;
 437
 438         default:
 439
 440                 ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
 441                             walk_state->opcode));
 442                 status = AE_AML_BAD_OPCODE;
 443                 break;
 444         }
 445
 446       store_result_to_target:
 447
 448         if (ACPI_SUCCESS(status)) {
 449                 /*
 450                  * Store the result of the operation (which is now in return_desc) into
 451                  * the Target descriptor.
 452                  */
 453                 status = acpi_ex_store(return_desc, operand[2], walk_state);
 454                 if (ACPI_FAILURE(status)) {
 455                         goto cleanup;
 456                 }
 457
 458                 if (!walk_state->result_obj) {
 459                         walk_state->result_obj = return_desc;
 460                 }
 461         }
 462
 463       cleanup:
 464
 465         /* Delete return object on error */
 466
 467         if (ACPI_FAILURE(status)) {
 468                 acpi_ut_remove_reference(return_desc);
 469                 walk_state->result_obj = NULL;
 470         }
 471
 472         return_ACPI_STATUS(status);
 473 }
 474
 475 /*******************************************************************************
 476  *
 477  * FUNCTION:    acpi_ex_opcode_2A_0T_1R
 478  *
 479  * PARAMETERS:  walk_state          - Current walk state
 480  *
 481  * RETURN:      Status
 482  *
 483  * DESCRIPTION: Execute opcode with 2 arguments, no target, and a return value
 484  *
 485  ******************************************************************************/
 486
 487 acpi_status acpi_ex_opcode_2A_0T_1R(struct acpi_walk_state *walk_state)
 488 {
 489         union acpi_operand_object **operand = &walk_state->operands[0];
 490         union acpi_operand_object *return_desc = NULL;
 491         acpi_status status = AE_OK;
 492         u8 logical_result = FALSE;
 493
 494         ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_0T_1R,
 495                                 acpi_ps_get_opcode_name(walk_state->opcode));
 496
 497         /* Create the internal return object */
 498
 499         return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
 500         if (!return_desc) {
 501                 status = AE_NO_MEMORY;
 502                 goto cleanup;
 503         }
 504
 505         /* Execute the Opcode */
 506
 507         if (walk_state->op_info->flags & AML_LOGICAL_NUMERIC) {
 508
 509                 /* logical_op (Operand0, Operand1) */
 510
 511                 status = acpi_ex_do_logical_numeric_op(walk_state->opcode,
 512                                                        operand[0]->integer.
 513                                                        value,
 514                                                        operand[1]->integer.
 515                                                        value, &logical_result);
 516                 goto store_logical_result;
 517         } else if (walk_state->op_info->flags & AML_LOGICAL) {
 518
 519                 /* logical_op (Operand0, Operand1) */
 520
 521                 status = acpi_ex_do_logical_op(walk_state->opcode, operand[0],
 522                                                operand[1], &logical_result);
 523                 goto store_logical_result;
 524         }
 525
 526         switch (walk_state->opcode) {
 527         case AML_ACQUIRE_OP:    /* Acquire (mutex_object, Timeout) */
 528
 529                 status =
 530                     acpi_ex_acquire_mutex(operand[1], operand[0], walk_state);
 531                 if (status == AE_TIME) {
 532                         logical_result = TRUE;  /* TRUE = Acquire timed out */
 533                         status = AE_OK;
 534                 }
 535                 break;
 536
 537         case AML_WAIT_OP:       /* Wait (event_object, Timeout) */
 538
 539                 status = acpi_ex_system_wait_event(operand[1], operand[0]);
 540                 if (status == AE_TIME) {
 541                         logical_result = TRUE;  /* TRUE, Wait timed out */
 542                         status = AE_OK;
 543                 }
 544                 break;
 545
 546         default:
 547
 548                 ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
 549                             walk_state->opcode));
 550                 status = AE_AML_BAD_OPCODE;
 551                 goto cleanup;
 552         }
 553
 554       store_logical_result:
 555         /*
 556          * Set return value to according to logical_result. logical TRUE (all ones)
 557          * Default is FALSE (zero)
 558          */
 559         if (logical_result) {
 560                 return_desc->integer.value = ACPI_UINT64_MAX;
 561         }
 562
 563       cleanup:
 564
 565         /* Delete return object on error */
 566
 567         if (ACPI_FAILURE(status)) {
 568                 acpi_ut_remove_reference(return_desc);
 569         }
 570
 571         /* Save return object on success */
 572
 573         else {
 574                 walk_state->result_obj = return_desc;
 575         }
 576
 577         return_ACPI_STATUS(status);
 578 }