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 - 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 "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
 203                 status = AE_AML_BAD_OPCODE;
 204                 goto cleanup;
 205         }
 206
 207         /* Store the results to the target reference operands */
 208
 209         status = acpi_ex_store(return_desc2, operand[2], walk_state);
 210         if (ACPI_FAILURE(status)) {
 211                 goto cleanup;
 212         }
 213
 214         status = acpi_ex_store(return_desc1, operand[3], walk_state);
 215         if (ACPI_FAILURE(status)) {
 216                 goto cleanup;
 217         }
 218
 219 cleanup:
 220         /*
 221          * Since the remainder is not returned indirectly, remove a reference to
 222          * it. Only the quotient is returned indirectly.
 223          */
 224         acpi_ut_remove_reference(return_desc2);
 225
 226         if (ACPI_FAILURE(status)) {
 227
 228                 /* Delete the return object */
 229
 230                 acpi_ut_remove_reference(return_desc1);
 231         }
 232
 233         /* Save return object (the remainder) on success */
 234
 235         else {
 236                 walk_state->result_obj = return_desc1;
 237         }
 238
 239         return_ACPI_STATUS(status);
 240 }
 241
 242 /*******************************************************************************
 243  *
 244  * FUNCTION:    acpi_ex_opcode_2A_1T_1R
 245  *
 246  * PARAMETERS:  walk_state          - Current walk state
 247  *
 248  * RETURN:      Status
 249  *
 250  * DESCRIPTION: Execute opcode with two arguments, one target, and a return
 251  *              value.
 252  *
 253  ******************************************************************************/
 254
 255 acpi_status acpi_ex_opcode_2A_1T_1R(struct acpi_walk_state *walk_state)
 256 {
 257         union acpi_operand_object **operand = &walk_state->operands[0];
 258         union acpi_operand_object *return_desc = NULL;
 259         u64 index;
 260         acpi_status status = AE_OK;
 261         acpi_size length = 0;
 262
 263         ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_1T_1R,
 264                                 acpi_ps_get_opcode_name(walk_state->opcode));
 265
 266         /* Execute the opcode */
 267
 268         if (walk_state->op_info->flags & AML_MATH) {
 269
 270                 /* All simple math opcodes (add, etc.) */
 271
 272                 return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
 273                 if (!return_desc) {
 274                         status = AE_NO_MEMORY;
 275                         goto cleanup;
 276                 }
 277
 278                 return_desc->integer.value =
 279                     acpi_ex_do_math_op(walk_state->opcode,
 280                                        operand[0]->integer.value,
 281                                        operand[1]->integer.value);
 282                 goto store_result_to_target;
 283         }
 284
 285         switch (walk_state->opcode) {
 286         case AML_MOD_OP:        /* Mod (Dividend, Divisor, remainder_result (ACPI 2.0) */
 287
 288                 return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
 289                 if (!return_desc) {
 290                         status = AE_NO_MEMORY;
 291                         goto cleanup;
 292                 }
 293
 294                 /* return_desc will contain the remainder */
 295
 296                 status = acpi_ut_divide(operand[0]->integer.value,
 297                                         operand[1]->integer.value,
 298                                         NULL, &return_desc->integer.value);
 299                 break;
 300
 301         case AML_CONCAT_OP:     /* Concatenate (Data1, Data2, Result) */
 302
 303                 status =
 304                     acpi_ex_do_concatenate(operand[0], operand[1], &return_desc,
 305                                            walk_state);
 306                 break;
 307
 308         case AML_TO_STRING_OP:  /* to_string (Buffer, Length, Result) (ACPI 2.0) */
 309                 /*
 310                  * Input object is guaranteed to be a buffer at this point (it may have
 311                  * been converted.)  Copy the raw buffer data to a new object of
 312                  * type String.
 313                  */
 314
 315                 /*
 316                  * Get the length of the new string. It is the smallest of:
 317                  * 1) Length of the input buffer
 318                  * 2) Max length as specified in the to_string operator
 319                  * 3) Length of input buffer up to a zero byte (null terminator)
 320                  *
 321                  * NOTE: A length of zero is ok, and will create a zero-length, null
 322                  *       terminated string.
 323                  */
 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                 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 =
 351                     acpi_ex_concat_template(operand[0], operand[1],
 352                                             &return_desc, walk_state);
 353                 break;
 354
 355         case AML_INDEX_OP:      /* Index (Source Index Result) */
 356
 357                 /* Create the internal return object */
 358
 359                 return_desc =
 360                     acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE);
 361                 if (!return_desc) {
 362                         status = AE_NO_MEMORY;
 363                         goto cleanup;
 364                 }
 365
 366                 /* Initialize the Index reference object */
 367
 368                 index = operand[1]->integer.value;
 369                 return_desc->reference.value = (u32) index;
 370                 return_desc->reference.class = ACPI_REFCLASS_INDEX;
 371
 372                 /*
 373                  * At this point, the Source operand is a String, Buffer, or Package.
 374                  * Verify that the index is within range.
 375                  */
 376                 switch ((operand[0])->common.type) {
 377                 case ACPI_TYPE_STRING:
 378
 379                         if (index >= operand[0]->string.length) {
 380                                 length = operand[0]->string.length;
 381                                 status = AE_AML_STRING_LIMIT;
 382                         }
 383
 384                         return_desc->reference.target_type =
 385                             ACPI_TYPE_BUFFER_FIELD;
 386                         return_desc->reference.index_pointer =
 387                             &(operand[0]->buffer.pointer[index]);
 388                         break;
 389
 390                 case ACPI_TYPE_BUFFER:
 391
 392                         if (index >= operand[0]->buffer.length) {
 393                                 length = operand[0]->buffer.length;
 394                                 status = AE_AML_BUFFER_LIMIT;
 395                         }
 396
 397                         return_desc->reference.target_type =
 398                             ACPI_TYPE_BUFFER_FIELD;
 399                         return_desc->reference.index_pointer =
 400                             &(operand[0]->buffer.pointer[index]);
 401                         break;
 402
 403                 case ACPI_TYPE_PACKAGE:
 404
 405                         if (index >= operand[0]->package.count) {
 406                                 length = operand[0]->package.count;
 407                                 status = AE_AML_PACKAGE_LIMIT;
 408                         }
 409
 410                         return_desc->reference.target_type = ACPI_TYPE_PACKAGE;
 411                         return_desc->reference.where =
 412                             &operand[0]->package.elements[index];
 413                         break;
 414
 415                 default:
 416
 417                         status = AE_AML_INTERNAL;
 418                         goto cleanup;
 419                 }
 420
 421                 /* Failure means that the Index was beyond the end of the object */
 422
 423                 if (ACPI_FAILURE(status)) {
 424                         ACPI_EXCEPTION((AE_INFO, status,
 425                                         "Index (0x%X%8.8X) is beyond end of object (length 0x%X)",
 426                                         ACPI_FORMAT_UINT64(index),
 427                                         (u32)length));
 428                         goto cleanup;
 429                 }
 430
 431                 /*
 432                  * Save the target object and add a reference to it for the life
 433                  * of the index
 434                  */
 435                 return_desc->reference.object = operand[0];
 436                 acpi_ut_add_reference(operand[0]);
 437
 438                 /* Store the reference to the Target */
 439
 440                 status = acpi_ex_store(return_desc, operand[2], walk_state);
 441
 442                 /* Return the reference */
 443
 444                 walk_state->result_obj = return_desc;
 445                 goto cleanup;
 446
 447         default:
 448
 449                 ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
 450                             walk_state->opcode));
 451                 status = AE_AML_BAD_OPCODE;
 452                 break;
 453         }
 454
 455 store_result_to_target:
 456
 457         if (ACPI_SUCCESS(status)) {
 458                 /*
 459                  * Store the result of the operation (which is now in return_desc) into
 460                  * the Target descriptor.
 461                  */
 462                 status = acpi_ex_store(return_desc, operand[2], walk_state);
 463                 if (ACPI_FAILURE(status)) {
 464                         goto cleanup;
 465                 }
 466
 467                 if (!walk_state->result_obj) {
 468                         walk_state->result_obj = return_desc;
 469                 }
 470         }
 471
 472 cleanup:
 473
 474         /* Delete return object on error */
 475
 476         if (ACPI_FAILURE(status)) {
 477                 acpi_ut_remove_reference(return_desc);
 478                 walk_state->result_obj = NULL;
 479         }
 480
 481         return_ACPI_STATUS(status);
 482 }
 483
 484 /*******************************************************************************
 485  *
 486  * FUNCTION:    acpi_ex_opcode_2A_0T_1R
 487  *
 488  * PARAMETERS:  walk_state          - Current walk state
 489  *
 490  * RETURN:      Status
 491  *
 492  * DESCRIPTION: Execute opcode with 2 arguments, no target, and a return value
 493  *
 494  ******************************************************************************/
 495
 496 acpi_status acpi_ex_opcode_2A_0T_1R(struct acpi_walk_state *walk_state)
 497 {
 498         union acpi_operand_object **operand = &walk_state->operands[0];
 499         union acpi_operand_object *return_desc = NULL;
 500         acpi_status status = AE_OK;
 501         u8 logical_result = FALSE;
 502
 503         ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_0T_1R,
 504                                 acpi_ps_get_opcode_name(walk_state->opcode));
 505
 506         /* Create the internal return object */
 507
 508         return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
 509         if (!return_desc) {
 510                 status = AE_NO_MEMORY;
 511                 goto cleanup;
 512         }
 513
 514         /* Execute the Opcode */
 515
 516         if (walk_state->op_info->flags & AML_LOGICAL_NUMERIC) {
 517
 518                 /* logical_op (Operand0, Operand1) */
 519
 520                 status = acpi_ex_do_logical_numeric_op(walk_state->opcode,
 521                                                        operand[0]->integer.
 522                                                        value,
 523                                                        operand[1]->integer.
 524                                                        value, &logical_result);
 525                 goto store_logical_result;
 526         } else if (walk_state->op_info->flags & AML_LOGICAL) {
 527
 528                 /* logical_op (Operand0, Operand1) */
 529
 530                 status = acpi_ex_do_logical_op(walk_state->opcode, operand[0],
 531                                                operand[1], &logical_result);
 532                 goto store_logical_result;
 533         }
 534
 535         switch (walk_state->opcode) {
 536         case AML_ACQUIRE_OP:    /* Acquire (mutex_object, Timeout) */
 537
 538                 status =
 539                     acpi_ex_acquire_mutex(operand[1], operand[0], walk_state);
 540                 if (status == AE_TIME) {
 541                         logical_result = TRUE;  /* TRUE = Acquire timed out */
 542                         status = AE_OK;
 543                 }
 544                 break;
 545
 546         case AML_WAIT_OP:       /* Wait (event_object, Timeout) */
 547
 548                 status = acpi_ex_system_wait_event(operand[1], operand[0]);
 549                 if (status == AE_TIME) {
 550                         logical_result = TRUE;  /* TRUE, Wait timed out */
 551                         status = AE_OK;
 552                 }
 553                 break;
 554
 555         default:
 556
 557                 ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
 558                             walk_state->opcode));
 559
 560                 status = AE_AML_BAD_OPCODE;
 561                 goto cleanup;
 562         }
 563
 564 store_logical_result:
 565         /*
 566          * Set return value to according to logical_result. logical TRUE (all ones)
 567          * Default is FALSE (zero)
 568          */
 569         if (logical_result) {
 570                 return_desc->integer.value = ACPI_UINT64_MAX;
 571         }
 572
 573 cleanup:
 574
 575         /* Delete return object on error */
 576
 577         if (ACPI_FAILURE(status)) {
 578                 acpi_ut_remove_reference(return_desc);
 579         }
 580
 581         /* Save return object on success */
 582
 583         else {
 584                 walk_state->result_obj = return_desc;
 585         }
 586
 587         return_ACPI_STATUS(status);
 588 }