1 /****************************************************************************** 2 * 3 * Module Name: exoparg2 - AML execution - opcodes with 2 arguments 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2012, 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 } 579