1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 2 /****************************************************************************** 3 * 4 * Module Name: dsopcode - Dispatcher support for regions and fields 5 * 6 * Copyright (C) 2000 - 2021, Intel Corp. 7 * 8 *****************************************************************************/ 9 10 #include <acpi/acpi.h> 11 #include "accommon.h" 12 #include "acparser.h" 13 #include "amlcode.h" 14 #include "acdispat.h" 15 #include "acinterp.h" 16 #include "acnamesp.h" 17 #include "acevents.h" 18 #include "actables.h" 19 20 #define _COMPONENT ACPI_DISPATCHER 21 ACPI_MODULE_NAME("dsopcode") 22 23 /* Local prototypes */ 24 static acpi_status 25 acpi_ds_init_buffer_field(u16 aml_opcode, 26 union acpi_operand_object *obj_desc, 27 union acpi_operand_object *buffer_desc, 28 union acpi_operand_object *offset_desc, 29 union acpi_operand_object *length_desc, 30 union acpi_operand_object *result_desc); 31 32 /******************************************************************************* 33 * 34 * FUNCTION: acpi_ds_initialize_region 35 * 36 * PARAMETERS: obj_handle - Region namespace node 37 * 38 * RETURN: Status 39 * 40 * DESCRIPTION: Front end to ev_initialize_region 41 * 42 ******************************************************************************/ 43 44 acpi_status acpi_ds_initialize_region(acpi_handle obj_handle) 45 { 46 union acpi_operand_object *obj_desc; 47 acpi_status status; 48 49 obj_desc = acpi_ns_get_attached_object(obj_handle); 50 51 /* Namespace is NOT locked */ 52 53 status = acpi_ev_initialize_region(obj_desc); 54 return (status); 55 } 56 57 /******************************************************************************* 58 * 59 * FUNCTION: acpi_ds_init_buffer_field 60 * 61 * PARAMETERS: aml_opcode - create_xxx_field 62 * obj_desc - buffer_field object 63 * buffer_desc - Host Buffer 64 * offset_desc - Offset into buffer 65 * length_desc - Length of field (CREATE_FIELD_OP only) 66 * result_desc - Where to store the result 67 * 68 * RETURN: Status 69 * 70 * DESCRIPTION: Perform actual initialization of a buffer field 71 * 72 ******************************************************************************/ 73 74 static acpi_status 75 acpi_ds_init_buffer_field(u16 aml_opcode, 76 union acpi_operand_object *obj_desc, 77 union acpi_operand_object *buffer_desc, 78 union acpi_operand_object *offset_desc, 79 union acpi_operand_object *length_desc, 80 union acpi_operand_object *result_desc) 81 { 82 u32 offset; 83 u32 bit_offset; 84 u32 bit_count; 85 u8 field_flags; 86 acpi_status status; 87 88 ACPI_FUNCTION_TRACE_PTR(ds_init_buffer_field, obj_desc); 89 90 /* Host object must be a Buffer */ 91 92 if (buffer_desc->common.type != ACPI_TYPE_BUFFER) { 93 ACPI_ERROR((AE_INFO, 94 "Target of Create Field is not a Buffer object - %s", 95 acpi_ut_get_object_type_name(buffer_desc))); 96 97 status = AE_AML_OPERAND_TYPE; 98 goto cleanup; 99 } 100 101 /* 102 * The last parameter to all of these opcodes (result_desc) started 103 * out as a name_string, and should therefore now be a NS node 104 * after resolution in acpi_ex_resolve_operands(). 105 */ 106 if (ACPI_GET_DESCRIPTOR_TYPE(result_desc) != ACPI_DESC_TYPE_NAMED) { 107 ACPI_ERROR((AE_INFO, 108 "(%s) destination not a NS Node [%s]", 109 acpi_ps_get_opcode_name(aml_opcode), 110 acpi_ut_get_descriptor_name(result_desc))); 111 112 status = AE_AML_OPERAND_TYPE; 113 goto cleanup; 114 } 115 116 offset = (u32) offset_desc->integer.value; 117 118 /* 119 * Setup the Bit offsets and counts, according to the opcode 120 */ 121 switch (aml_opcode) { 122 case AML_CREATE_FIELD_OP: 123 124 /* Offset is in bits, count is in bits */ 125 126 field_flags = AML_FIELD_ACCESS_BYTE; 127 bit_offset = offset; 128 bit_count = (u32) length_desc->integer.value; 129 130 /* Must have a valid (>0) bit count */ 131 132 if (bit_count == 0) { 133 ACPI_BIOS_ERROR((AE_INFO, 134 "Attempt to CreateField of length zero")); 135 status = AE_AML_OPERAND_VALUE; 136 goto cleanup; 137 } 138 break; 139 140 case AML_CREATE_BIT_FIELD_OP: 141 142 /* Offset is in bits, Field is one bit */ 143 144 bit_offset = offset; 145 bit_count = 1; 146 field_flags = AML_FIELD_ACCESS_BYTE; 147 break; 148 149 case AML_CREATE_BYTE_FIELD_OP: 150 151 /* Offset is in bytes, field is one byte */ 152 153 bit_offset = 8 * offset; 154 bit_count = 8; 155 field_flags = AML_FIELD_ACCESS_BYTE; 156 break; 157 158 case AML_CREATE_WORD_FIELD_OP: 159 160 /* Offset is in bytes, field is one word */ 161 162 bit_offset = 8 * offset; 163 bit_count = 16; 164 field_flags = AML_FIELD_ACCESS_WORD; 165 break; 166 167 case AML_CREATE_DWORD_FIELD_OP: 168 169 /* Offset is in bytes, field is one dword */ 170 171 bit_offset = 8 * offset; 172 bit_count = 32; 173 field_flags = AML_FIELD_ACCESS_DWORD; 174 break; 175 176 case AML_CREATE_QWORD_FIELD_OP: 177 178 /* Offset is in bytes, field is one qword */ 179 180 bit_offset = 8 * offset; 181 bit_count = 64; 182 field_flags = AML_FIELD_ACCESS_QWORD; 183 break; 184 185 default: 186 187 ACPI_ERROR((AE_INFO, 188 "Unknown field creation opcode 0x%02X", 189 aml_opcode)); 190 status = AE_AML_BAD_OPCODE; 191 goto cleanup; 192 } 193 194 /* Entire field must fit within the current length of the buffer */ 195 196 if ((bit_offset + bit_count) > (8 * (u32)buffer_desc->buffer.length)) { 197 status = AE_AML_BUFFER_LIMIT; 198 ACPI_BIOS_EXCEPTION((AE_INFO, status, 199 "Field [%4.4s] at bit offset/length %u/%u " 200 "exceeds size of target Buffer (%u bits)", 201 acpi_ut_get_node_name(result_desc), 202 bit_offset, bit_count, 203 8 * (u32)buffer_desc->buffer.length)); 204 goto cleanup; 205 } 206 207 /* 208 * Initialize areas of the field object that are common to all fields 209 * For field_flags, use LOCK_RULE = 0 (NO_LOCK), 210 * UPDATE_RULE = 0 (UPDATE_PRESERVE) 211 */ 212 status = 213 acpi_ex_prep_common_field_object(obj_desc, field_flags, 0, 214 bit_offset, bit_count); 215 if (ACPI_FAILURE(status)) { 216 goto cleanup; 217 } 218 219 obj_desc->buffer_field.buffer_obj = buffer_desc; 220 obj_desc->buffer_field.is_create_field = 221 aml_opcode == AML_CREATE_FIELD_OP; 222 223 /* Reference count for buffer_desc inherits obj_desc count */ 224 225 buffer_desc->common.reference_count = (u16) 226 (buffer_desc->common.reference_count + 227 obj_desc->common.reference_count); 228 229 cleanup: 230 231 /* Always delete the operands */ 232 233 acpi_ut_remove_reference(offset_desc); 234 acpi_ut_remove_reference(buffer_desc); 235 236 if (aml_opcode == AML_CREATE_FIELD_OP) { 237 acpi_ut_remove_reference(length_desc); 238 } 239 240 /* On failure, delete the result descriptor */ 241 242 if (ACPI_FAILURE(status)) { 243 acpi_ut_remove_reference(result_desc); /* Result descriptor */ 244 } else { 245 /* Now the address and length are valid for this buffer_field */ 246 247 obj_desc->buffer_field.flags |= AOPOBJ_DATA_VALID; 248 } 249 250 return_ACPI_STATUS(status); 251 } 252 253 /******************************************************************************* 254 * 255 * FUNCTION: acpi_ds_eval_buffer_field_operands 256 * 257 * PARAMETERS: walk_state - Current walk 258 * op - A valid buffer_field Op object 259 * 260 * RETURN: Status 261 * 262 * DESCRIPTION: Get buffer_field Buffer and Index 263 * Called from acpi_ds_exec_end_op during buffer_field parse tree walk 264 * 265 ******************************************************************************/ 266 267 acpi_status 268 acpi_ds_eval_buffer_field_operands(struct acpi_walk_state *walk_state, 269 union acpi_parse_object *op) 270 { 271 acpi_status status; 272 union acpi_operand_object *obj_desc; 273 struct acpi_namespace_node *node; 274 union acpi_parse_object *next_op; 275 276 ACPI_FUNCTION_TRACE_PTR(ds_eval_buffer_field_operands, op); 277 278 /* 279 * This is where we evaluate the address and length fields of the 280 * create_xxx_field declaration 281 */ 282 node = op->common.node; 283 284 /* next_op points to the op that holds the Buffer */ 285 286 next_op = op->common.value.arg; 287 288 /* Evaluate/create the address and length operands */ 289 290 status = acpi_ds_create_operands(walk_state, next_op); 291 if (ACPI_FAILURE(status)) { 292 return_ACPI_STATUS(status); 293 } 294 295 obj_desc = acpi_ns_get_attached_object(node); 296 if (!obj_desc) { 297 return_ACPI_STATUS(AE_NOT_EXIST); 298 } 299 300 /* Resolve the operands */ 301 302 status = 303 acpi_ex_resolve_operands(op->common.aml_opcode, ACPI_WALK_OPERANDS, 304 walk_state); 305 if (ACPI_FAILURE(status)) { 306 ACPI_ERROR((AE_INFO, "(%s) bad operand(s), status 0x%X", 307 acpi_ps_get_opcode_name(op->common.aml_opcode), 308 status)); 309 310 return_ACPI_STATUS(status); 311 } 312 313 /* Initialize the Buffer Field */ 314 315 if (op->common.aml_opcode == AML_CREATE_FIELD_OP) { 316 317 /* NOTE: Slightly different operands for this opcode */ 318 319 status = 320 acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc, 321 walk_state->operands[0], 322 walk_state->operands[1], 323 walk_state->operands[2], 324 walk_state->operands[3]); 325 } else { 326 /* All other, create_xxx_field opcodes */ 327 328 status = 329 acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc, 330 walk_state->operands[0], 331 walk_state->operands[1], NULL, 332 walk_state->operands[2]); 333 } 334 335 return_ACPI_STATUS(status); 336 } 337 338 /******************************************************************************* 339 * 340 * FUNCTION: acpi_ds_eval_region_operands 341 * 342 * PARAMETERS: walk_state - Current walk 343 * op - A valid region Op object 344 * 345 * RETURN: Status 346 * 347 * DESCRIPTION: Get region address and length 348 * Called from acpi_ds_exec_end_op during op_region parse tree walk 349 * 350 ******************************************************************************/ 351 352 acpi_status 353 acpi_ds_eval_region_operands(struct acpi_walk_state *walk_state, 354 union acpi_parse_object *op) 355 { 356 acpi_status status; 357 union acpi_operand_object *obj_desc; 358 union acpi_operand_object *operand_desc; 359 struct acpi_namespace_node *node; 360 union acpi_parse_object *next_op; 361 acpi_adr_space_type space_id; 362 363 ACPI_FUNCTION_TRACE_PTR(ds_eval_region_operands, op); 364 365 /* 366 * This is where we evaluate the address and length fields of the 367 * op_region declaration 368 */ 369 node = op->common.node; 370 371 /* next_op points to the op that holds the space_ID */ 372 373 next_op = op->common.value.arg; 374 space_id = (acpi_adr_space_type)next_op->common.value.integer; 375 376 /* next_op points to address op */ 377 378 next_op = next_op->common.next; 379 380 /* Evaluate/create the address and length operands */ 381 382 status = acpi_ds_create_operands(walk_state, next_op); 383 if (ACPI_FAILURE(status)) { 384 return_ACPI_STATUS(status); 385 } 386 387 /* Resolve the length and address operands to numbers */ 388 389 status = 390 acpi_ex_resolve_operands(op->common.aml_opcode, ACPI_WALK_OPERANDS, 391 walk_state); 392 if (ACPI_FAILURE(status)) { 393 return_ACPI_STATUS(status); 394 } 395 396 obj_desc = acpi_ns_get_attached_object(node); 397 if (!obj_desc) { 398 return_ACPI_STATUS(AE_NOT_EXIST); 399 } 400 401 /* 402 * Get the length operand and save it 403 * (at Top of stack) 404 */ 405 operand_desc = walk_state->operands[walk_state->num_operands - 1]; 406 407 obj_desc->region.length = (u32) operand_desc->integer.value; 408 acpi_ut_remove_reference(operand_desc); 409 410 /* A zero-length operation region is unusable. Just warn */ 411 412 if (!obj_desc->region.length 413 && (space_id < ACPI_NUM_PREDEFINED_REGIONS)) { 414 ACPI_WARNING((AE_INFO, 415 "Operation Region [%4.4s] has zero length (SpaceId %X)", 416 node->name.ascii, space_id)); 417 } 418 419 /* 420 * Get the address and save it 421 * (at top of stack - 1) 422 */ 423 operand_desc = walk_state->operands[walk_state->num_operands - 2]; 424 425 obj_desc->region.address = (acpi_physical_address) 426 operand_desc->integer.value; 427 acpi_ut_remove_reference(operand_desc); 428 429 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n", 430 obj_desc, 431 ACPI_FORMAT_UINT64(obj_desc->region.address), 432 obj_desc->region.length)); 433 434 status = acpi_ut_add_address_range(obj_desc->region.space_id, 435 obj_desc->region.address, 436 obj_desc->region.length, node); 437 438 /* Now the address and length are valid for this opregion */ 439 440 obj_desc->region.flags |= AOPOBJ_DATA_VALID; 441 return_ACPI_STATUS(status); 442 } 443 444 /******************************************************************************* 445 * 446 * FUNCTION: acpi_ds_eval_table_region_operands 447 * 448 * PARAMETERS: walk_state - Current walk 449 * op - A valid region Op object 450 * 451 * RETURN: Status 452 * 453 * DESCRIPTION: Get region address and length. 454 * Called from acpi_ds_exec_end_op during data_table_region parse 455 * tree walk. 456 * 457 ******************************************************************************/ 458 459 acpi_status 460 acpi_ds_eval_table_region_operands(struct acpi_walk_state *walk_state, 461 union acpi_parse_object *op) 462 { 463 acpi_status status; 464 union acpi_operand_object *obj_desc; 465 union acpi_operand_object **operand; 466 struct acpi_namespace_node *node; 467 union acpi_parse_object *next_op; 468 struct acpi_table_header *table; 469 u32 table_index; 470 471 ACPI_FUNCTION_TRACE_PTR(ds_eval_table_region_operands, op); 472 473 /* 474 * This is where we evaluate the Signature string, oem_id string, 475 * and oem_table_id string of the Data Table Region declaration 476 */ 477 node = op->common.node; 478 479 /* next_op points to Signature string op */ 480 481 next_op = op->common.value.arg; 482 483 /* 484 * Evaluate/create the Signature string, oem_id string, 485 * and oem_table_id string operands 486 */ 487 status = acpi_ds_create_operands(walk_state, next_op); 488 if (ACPI_FAILURE(status)) { 489 return_ACPI_STATUS(status); 490 } 491 492 operand = &walk_state->operands[0]; 493 494 /* 495 * Resolve the Signature string, oem_id string, 496 * and oem_table_id string operands 497 */ 498 status = 499 acpi_ex_resolve_operands(op->common.aml_opcode, ACPI_WALK_OPERANDS, 500 walk_state); 501 if (ACPI_FAILURE(status)) { 502 goto cleanup; 503 } 504 505 /* Find the ACPI table */ 506 507 status = acpi_tb_find_table(operand[0]->string.pointer, 508 operand[1]->string.pointer, 509 operand[2]->string.pointer, &table_index); 510 if (ACPI_FAILURE(status)) { 511 if (status == AE_NOT_FOUND) { 512 ACPI_ERROR((AE_INFO, 513 "ACPI Table [%4.4s] OEM:(%s, %s) not found in RSDT/XSDT", 514 operand[0]->string.pointer, 515 operand[1]->string.pointer, 516 operand[2]->string.pointer)); 517 } 518 goto cleanup; 519 } 520 521 status = acpi_get_table_by_index(table_index, &table); 522 if (ACPI_FAILURE(status)) { 523 goto cleanup; 524 } 525 526 obj_desc = acpi_ns_get_attached_object(node); 527 if (!obj_desc) { 528 status = AE_NOT_EXIST; 529 goto cleanup; 530 } 531 532 obj_desc->region.address = ACPI_PTR_TO_PHYSADDR(table); 533 obj_desc->region.length = table->length; 534 535 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n", 536 obj_desc, 537 ACPI_FORMAT_UINT64(obj_desc->region.address), 538 obj_desc->region.length)); 539 540 /* Now the address and length are valid for this opregion */ 541 542 obj_desc->region.flags |= AOPOBJ_DATA_VALID; 543 544 cleanup: 545 acpi_ut_remove_reference(operand[0]); 546 acpi_ut_remove_reference(operand[1]); 547 acpi_ut_remove_reference(operand[2]); 548 549 return_ACPI_STATUS(status); 550 } 551 552 /******************************************************************************* 553 * 554 * FUNCTION: acpi_ds_eval_data_object_operands 555 * 556 * PARAMETERS: walk_state - Current walk 557 * op - A valid data_object Op object 558 * obj_desc - data_object 559 * 560 * RETURN: Status 561 * 562 * DESCRIPTION: Get the operands and complete the following data object types: 563 * Buffer, Package. 564 * 565 ******************************************************************************/ 566 567 acpi_status 568 acpi_ds_eval_data_object_operands(struct acpi_walk_state *walk_state, 569 union acpi_parse_object *op, 570 union acpi_operand_object *obj_desc) 571 { 572 acpi_status status; 573 union acpi_operand_object *arg_desc; 574 u32 length; 575 576 ACPI_FUNCTION_TRACE(ds_eval_data_object_operands); 577 578 /* The first operand (for all of these data objects) is the length */ 579 580 /* 581 * Set proper index into operand stack for acpi_ds_obj_stack_push 582 * invoked inside acpi_ds_create_operand. 583 */ 584 walk_state->operand_index = walk_state->num_operands; 585 586 /* Ignore if child is not valid */ 587 588 if (!op->common.value.arg) { 589 ACPI_ERROR((AE_INFO, 590 "Missing child while evaluating opcode %4.4X, Op %p", 591 op->common.aml_opcode, op)); 592 return_ACPI_STATUS(AE_OK); 593 } 594 595 status = acpi_ds_create_operand(walk_state, op->common.value.arg, 1); 596 if (ACPI_FAILURE(status)) { 597 return_ACPI_STATUS(status); 598 } 599 600 status = acpi_ex_resolve_operands(walk_state->opcode, 601 &(walk_state-> 602 operands[walk_state->num_operands - 603 1]), walk_state); 604 if (ACPI_FAILURE(status)) { 605 return_ACPI_STATUS(status); 606 } 607 608 /* Extract length operand */ 609 610 arg_desc = walk_state->operands[walk_state->num_operands - 1]; 611 length = (u32) arg_desc->integer.value; 612 613 /* Cleanup for length operand */ 614 615 status = acpi_ds_obj_stack_pop(1, walk_state); 616 if (ACPI_FAILURE(status)) { 617 return_ACPI_STATUS(status); 618 } 619 620 acpi_ut_remove_reference(arg_desc); 621 622 /* 623 * Create the actual data object 624 */ 625 switch (op->common.aml_opcode) { 626 case AML_BUFFER_OP: 627 628 status = 629 acpi_ds_build_internal_buffer_obj(walk_state, op, length, 630 &obj_desc); 631 break; 632 633 case AML_PACKAGE_OP: 634 case AML_VARIABLE_PACKAGE_OP: 635 636 status = 637 acpi_ds_build_internal_package_obj(walk_state, op, length, 638 &obj_desc); 639 break; 640 641 default: 642 643 return_ACPI_STATUS(AE_AML_BAD_OPCODE); 644 } 645 646 if (ACPI_SUCCESS(status)) { 647 /* 648 * Return the object in the walk_state, unless the parent is a package - 649 * in this case, the return object will be stored in the parse tree 650 * for the package. 651 */ 652 if ((!op->common.parent) || 653 ((op->common.parent->common.aml_opcode != AML_PACKAGE_OP) && 654 (op->common.parent->common.aml_opcode != 655 AML_VARIABLE_PACKAGE_OP) 656 && (op->common.parent->common.aml_opcode != 657 AML_NAME_OP))) { 658 walk_state->result_obj = obj_desc; 659 } 660 } 661 662 return_ACPI_STATUS(status); 663 } 664 665 /******************************************************************************* 666 * 667 * FUNCTION: acpi_ds_eval_bank_field_operands 668 * 669 * PARAMETERS: walk_state - Current walk 670 * op - A valid bank_field Op object 671 * 672 * RETURN: Status 673 * 674 * DESCRIPTION: Get bank_field bank_value 675 * Called from acpi_ds_exec_end_op during bank_field parse tree walk 676 * 677 ******************************************************************************/ 678 679 acpi_status 680 acpi_ds_eval_bank_field_operands(struct acpi_walk_state *walk_state, 681 union acpi_parse_object *op) 682 { 683 acpi_status status; 684 union acpi_operand_object *obj_desc; 685 union acpi_operand_object *operand_desc; 686 struct acpi_namespace_node *node; 687 union acpi_parse_object *next_op; 688 union acpi_parse_object *arg; 689 690 ACPI_FUNCTION_TRACE_PTR(ds_eval_bank_field_operands, op); 691 692 /* 693 * This is where we evaluate the bank_value field of the 694 * bank_field declaration 695 */ 696 697 /* next_op points to the op that holds the Region */ 698 699 next_op = op->common.value.arg; 700 701 /* next_op points to the op that holds the Bank Register */ 702 703 next_op = next_op->common.next; 704 705 /* next_op points to the op that holds the Bank Value */ 706 707 next_op = next_op->common.next; 708 709 /* 710 * Set proper index into operand stack for acpi_ds_obj_stack_push 711 * invoked inside acpi_ds_create_operand. 712 * 713 * We use walk_state->Operands[0] to store the evaluated bank_value 714 */ 715 walk_state->operand_index = 0; 716 717 status = acpi_ds_create_operand(walk_state, next_op, 0); 718 if (ACPI_FAILURE(status)) { 719 return_ACPI_STATUS(status); 720 } 721 722 status = acpi_ex_resolve_to_value(&walk_state->operands[0], walk_state); 723 if (ACPI_FAILURE(status)) { 724 return_ACPI_STATUS(status); 725 } 726 727 ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS, 728 acpi_ps_get_opcode_name(op->common.aml_opcode), 1); 729 /* 730 * Get the bank_value operand and save it 731 * (at Top of stack) 732 */ 733 operand_desc = walk_state->operands[0]; 734 735 /* Arg points to the start Bank Field */ 736 737 arg = acpi_ps_get_arg(op, 4); 738 while (arg) { 739 740 /* Ignore OFFSET and ACCESSAS terms here */ 741 742 if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) { 743 node = arg->common.node; 744 745 obj_desc = acpi_ns_get_attached_object(node); 746 if (!obj_desc) { 747 return_ACPI_STATUS(AE_NOT_EXIST); 748 } 749 750 obj_desc->bank_field.value = 751 (u32) operand_desc->integer.value; 752 } 753 754 /* Move to next field in the list */ 755 756 arg = arg->common.next; 757 } 758 759 acpi_ut_remove_reference(operand_desc); 760 return_ACPI_STATUS(status); 761 } 762