1 /****************************************************************************** 2 * 3 * Module Name: psargs - Parse AML opcode arguments 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2018, 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 "amlcode.h" 48 #include "acnamesp.h" 49 #include "acdispat.h" 50 #include "acconvert.h" 51 52 #define _COMPONENT ACPI_PARSER 53 ACPI_MODULE_NAME("psargs") 54 55 /* Local prototypes */ 56 static u32 57 acpi_ps_get_next_package_length(struct acpi_parse_state *parser_state); 58 59 static union acpi_parse_object *acpi_ps_get_next_field(struct acpi_parse_state 60 *parser_state); 61 62 /******************************************************************************* 63 * 64 * FUNCTION: acpi_ps_get_next_package_length 65 * 66 * PARAMETERS: parser_state - Current parser state object 67 * 68 * RETURN: Decoded package length. On completion, the AML pointer points 69 * past the length byte or bytes. 70 * 71 * DESCRIPTION: Decode and return a package length field. 72 * Note: Largest package length is 28 bits, from ACPI specification 73 * 74 ******************************************************************************/ 75 76 static u32 77 acpi_ps_get_next_package_length(struct acpi_parse_state *parser_state) 78 { 79 u8 *aml = parser_state->aml; 80 u32 package_length = 0; 81 u32 byte_count; 82 u8 byte_zero_mask = 0x3F; /* Default [0:5] */ 83 84 ACPI_FUNCTION_TRACE(ps_get_next_package_length); 85 86 /* 87 * Byte 0 bits [6:7] contain the number of additional bytes 88 * used to encode the package length, either 0,1,2, or 3 89 */ 90 byte_count = (aml[0] >> 6); 91 parser_state->aml += ((acpi_size)byte_count + 1); 92 93 /* Get bytes 3, 2, 1 as needed */ 94 95 while (byte_count) { 96 /* 97 * Final bit positions for the package length bytes: 98 * Byte3->[20:27] 99 * Byte2->[12:19] 100 * Byte1->[04:11] 101 * Byte0->[00:03] 102 */ 103 package_length |= (aml[byte_count] << ((byte_count << 3) - 4)); 104 105 byte_zero_mask = 0x0F; /* Use bits [0:3] of byte 0 */ 106 byte_count--; 107 } 108 109 /* Byte 0 is a special case, either bits [0:3] or [0:5] are used */ 110 111 package_length |= (aml[0] & byte_zero_mask); 112 return_UINT32(package_length); 113 } 114 115 /******************************************************************************* 116 * 117 * FUNCTION: acpi_ps_get_next_package_end 118 * 119 * PARAMETERS: parser_state - Current parser state object 120 * 121 * RETURN: Pointer to end-of-package +1 122 * 123 * DESCRIPTION: Get next package length and return a pointer past the end of 124 * the package. Consumes the package length field 125 * 126 ******************************************************************************/ 127 128 u8 *acpi_ps_get_next_package_end(struct acpi_parse_state *parser_state) 129 { 130 u8 *start = parser_state->aml; 131 u32 package_length; 132 133 ACPI_FUNCTION_TRACE(ps_get_next_package_end); 134 135 /* Function below updates parser_state->Aml */ 136 137 package_length = acpi_ps_get_next_package_length(parser_state); 138 139 return_PTR(start + package_length); /* end of package */ 140 } 141 142 /******************************************************************************* 143 * 144 * FUNCTION: acpi_ps_get_next_namestring 145 * 146 * PARAMETERS: parser_state - Current parser state object 147 * 148 * RETURN: Pointer to the start of the name string (pointer points into 149 * the AML. 150 * 151 * DESCRIPTION: Get next raw namestring within the AML stream. Handles all name 152 * prefix characters. Set parser state to point past the string. 153 * (Name is consumed from the AML.) 154 * 155 ******************************************************************************/ 156 157 char *acpi_ps_get_next_namestring(struct acpi_parse_state *parser_state) 158 { 159 u8 *start = parser_state->aml; 160 u8 *end = parser_state->aml; 161 162 ACPI_FUNCTION_TRACE(ps_get_next_namestring); 163 164 /* Point past any namestring prefix characters (backslash or carat) */ 165 166 while (ACPI_IS_ROOT_PREFIX(*end) || ACPI_IS_PARENT_PREFIX(*end)) { 167 end++; 168 } 169 170 /* Decode the path prefix character */ 171 172 switch (*end) { 173 case 0: 174 175 /* null_name */ 176 177 if (end == start) { 178 start = NULL; 179 } 180 end++; 181 break; 182 183 case AML_DUAL_NAME_PREFIX: 184 185 /* Two name segments */ 186 187 end += 1 + (2 * ACPI_NAME_SIZE); 188 break; 189 190 case AML_MULTI_NAME_PREFIX: 191 192 /* Multiple name segments, 4 chars each, count in next byte */ 193 194 end += 2 + (*(end + 1) * ACPI_NAME_SIZE); 195 break; 196 197 default: 198 199 /* Single name segment */ 200 201 end += ACPI_NAME_SIZE; 202 break; 203 } 204 205 parser_state->aml = end; 206 return_PTR((char *)start); 207 } 208 209 /******************************************************************************* 210 * 211 * FUNCTION: acpi_ps_get_next_namepath 212 * 213 * PARAMETERS: parser_state - Current parser state object 214 * arg - Where the namepath will be stored 215 * arg_count - If the namepath points to a control method 216 * the method's argument is returned here. 217 * possible_method_call - Whether the namepath can possibly be the 218 * start of a method call 219 * 220 * RETURN: Status 221 * 222 * DESCRIPTION: Get next name (if method call, return # of required args). 223 * Names are looked up in the internal namespace to determine 224 * if the name represents a control method. If a method 225 * is found, the number of arguments to the method is returned. 226 * This information is critical for parsing to continue correctly. 227 * 228 ******************************************************************************/ 229 230 acpi_status 231 acpi_ps_get_next_namepath(struct acpi_walk_state *walk_state, 232 struct acpi_parse_state *parser_state, 233 union acpi_parse_object *arg, u8 possible_method_call) 234 { 235 acpi_status status; 236 char *path; 237 union acpi_parse_object *name_op; 238 union acpi_operand_object *method_desc; 239 struct acpi_namespace_node *node; 240 u8 *start = parser_state->aml; 241 242 ACPI_FUNCTION_TRACE(ps_get_next_namepath); 243 244 path = acpi_ps_get_next_namestring(parser_state); 245 acpi_ps_init_op(arg, AML_INT_NAMEPATH_OP); 246 247 /* Null path case is allowed, just exit */ 248 249 if (!path) { 250 arg->common.value.name = path; 251 return_ACPI_STATUS(AE_OK); 252 } 253 254 /* 255 * Lookup the name in the internal namespace, starting with the current 256 * scope. We don't want to add anything new to the namespace here, 257 * however, so we use MODE_EXECUTE. 258 * Allow searching of the parent tree, but don't open a new scope - 259 * we just want to lookup the object (must be mode EXECUTE to perform 260 * the upsearch) 261 */ 262 status = acpi_ns_lookup(walk_state->scope_info, path, 263 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 264 ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, 265 NULL, &node); 266 267 /* 268 * If this name is a control method invocation, we must 269 * setup the method call 270 */ 271 if (ACPI_SUCCESS(status) && 272 possible_method_call && (node->type == ACPI_TYPE_METHOD)) { 273 if ((GET_CURRENT_ARG_TYPE(walk_state->arg_types) == 274 ARGP_SUPERNAME) 275 || (GET_CURRENT_ARG_TYPE(walk_state->arg_types) == 276 ARGP_TARGET)) { 277 /* 278 * acpi_ps_get_next_namestring has increased the AML pointer past 279 * the method invocation namestring, so we need to restore the 280 * saved AML pointer back to the original method invocation 281 * namestring. 282 */ 283 walk_state->parser_state.aml = start; 284 walk_state->arg_count = 1; 285 acpi_ps_init_op(arg, AML_INT_METHODCALL_OP); 286 } 287 288 /* This name is actually a control method invocation */ 289 290 method_desc = acpi_ns_get_attached_object(node); 291 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, 292 "Control Method invocation %4.4s - %p Desc %p Path=%p\n", 293 node->name.ascii, node, method_desc, path)); 294 295 name_op = acpi_ps_alloc_op(AML_INT_NAMEPATH_OP, start); 296 if (!name_op) { 297 return_ACPI_STATUS(AE_NO_MEMORY); 298 } 299 300 /* Change Arg into a METHOD CALL and attach name to it */ 301 302 acpi_ps_init_op(arg, AML_INT_METHODCALL_OP); 303 name_op->common.value.name = path; 304 305 /* Point METHODCALL/NAME to the METHOD Node */ 306 307 name_op->common.node = node; 308 acpi_ps_append_arg(arg, name_op); 309 310 if (!method_desc) { 311 ACPI_ERROR((AE_INFO, 312 "Control Method %p has no attached object", 313 node)); 314 return_ACPI_STATUS(AE_AML_INTERNAL); 315 } 316 317 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, 318 "Control Method - %p Args %X\n", 319 node, method_desc->method.param_count)); 320 321 /* Get the number of arguments to expect */ 322 323 walk_state->arg_count = method_desc->method.param_count; 324 return_ACPI_STATUS(AE_OK); 325 } 326 327 /* 328 * Special handling if the name was not found during the lookup - 329 * some not_found cases are allowed 330 */ 331 if (status == AE_NOT_FOUND) { 332 333 /* 1) not_found is ok during load pass 1/2 (allow forward references) */ 334 335 if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) != 336 ACPI_PARSE_EXECUTE) { 337 status = AE_OK; 338 } 339 340 /* 2) not_found during a cond_ref_of(x) is ok by definition */ 341 342 else if (walk_state->op->common.aml_opcode == 343 AML_CONDITIONAL_REF_OF_OP) { 344 status = AE_OK; 345 } 346 347 /* 348 * 3) not_found while building a Package is ok at this point, we 349 * may flag as an error later if slack mode is not enabled. 350 * (Some ASL code depends on allowing this behavior) 351 */ 352 else if ((arg->common.parent) && 353 ((arg->common.parent->common.aml_opcode == 354 AML_PACKAGE_OP) 355 || (arg->common.parent->common.aml_opcode == 356 AML_VARIABLE_PACKAGE_OP))) { 357 status = AE_OK; 358 } 359 } 360 361 /* Final exception check (may have been changed from code above) */ 362 363 if (ACPI_FAILURE(status)) { 364 ACPI_ERROR_NAMESPACE(walk_state->scope_info, path, status); 365 366 if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) == 367 ACPI_PARSE_EXECUTE) { 368 369 /* Report a control method execution error */ 370 371 status = acpi_ds_method_error(status, walk_state); 372 } 373 } 374 375 /* Save the namepath */ 376 377 arg->common.value.name = path; 378 return_ACPI_STATUS(status); 379 } 380 381 /******************************************************************************* 382 * 383 * FUNCTION: acpi_ps_get_next_simple_arg 384 * 385 * PARAMETERS: parser_state - Current parser state object 386 * arg_type - The argument type (AML_*_ARG) 387 * arg - Where the argument is returned 388 * 389 * RETURN: None 390 * 391 * DESCRIPTION: Get the next simple argument (constant, string, or namestring) 392 * 393 ******************************************************************************/ 394 395 void 396 acpi_ps_get_next_simple_arg(struct acpi_parse_state *parser_state, 397 u32 arg_type, union acpi_parse_object *arg) 398 { 399 u32 length; 400 u16 opcode; 401 u8 *aml = parser_state->aml; 402 403 ACPI_FUNCTION_TRACE_U32(ps_get_next_simple_arg, arg_type); 404 405 switch (arg_type) { 406 case ARGP_BYTEDATA: 407 408 /* Get 1 byte from the AML stream */ 409 410 opcode = AML_BYTE_OP; 411 arg->common.value.integer = (u64) *aml; 412 length = 1; 413 break; 414 415 case ARGP_WORDDATA: 416 417 /* Get 2 bytes from the AML stream */ 418 419 opcode = AML_WORD_OP; 420 ACPI_MOVE_16_TO_64(&arg->common.value.integer, aml); 421 length = 2; 422 break; 423 424 case ARGP_DWORDDATA: 425 426 /* Get 4 bytes from the AML stream */ 427 428 opcode = AML_DWORD_OP; 429 ACPI_MOVE_32_TO_64(&arg->common.value.integer, aml); 430 length = 4; 431 break; 432 433 case ARGP_QWORDDATA: 434 435 /* Get 8 bytes from the AML stream */ 436 437 opcode = AML_QWORD_OP; 438 ACPI_MOVE_64_TO_64(&arg->common.value.integer, aml); 439 length = 8; 440 break; 441 442 case ARGP_CHARLIST: 443 444 /* Get a pointer to the string, point past the string */ 445 446 opcode = AML_STRING_OP; 447 arg->common.value.string = ACPI_CAST_PTR(char, aml); 448 449 /* Find the null terminator */ 450 451 length = 0; 452 while (aml[length]) { 453 length++; 454 } 455 length++; 456 break; 457 458 case ARGP_NAME: 459 case ARGP_NAMESTRING: 460 461 acpi_ps_init_op(arg, AML_INT_NAMEPATH_OP); 462 arg->common.value.name = 463 acpi_ps_get_next_namestring(parser_state); 464 return_VOID; 465 466 default: 467 468 ACPI_ERROR((AE_INFO, "Invalid ArgType 0x%X", arg_type)); 469 return_VOID; 470 } 471 472 acpi_ps_init_op(arg, opcode); 473 parser_state->aml += length; 474 return_VOID; 475 } 476 477 /******************************************************************************* 478 * 479 * FUNCTION: acpi_ps_get_next_field 480 * 481 * PARAMETERS: parser_state - Current parser state object 482 * 483 * RETURN: A newly allocated FIELD op 484 * 485 * DESCRIPTION: Get next field (named_field, reserved_field, or access_field) 486 * 487 ******************************************************************************/ 488 489 static union acpi_parse_object *acpi_ps_get_next_field(struct acpi_parse_state 490 *parser_state) 491 { 492 u8 *aml; 493 union acpi_parse_object *field; 494 union acpi_parse_object *arg = NULL; 495 u16 opcode; 496 u32 name; 497 u8 access_type; 498 u8 access_attribute; 499 u8 access_length; 500 u32 pkg_length; 501 u8 *pkg_end; 502 u32 buffer_length; 503 504 ACPI_FUNCTION_TRACE(ps_get_next_field); 505 506 ASL_CV_CAPTURE_COMMENTS_ONLY(parser_state); 507 aml = parser_state->aml; 508 509 /* Determine field type */ 510 511 switch (ACPI_GET8(parser_state->aml)) { 512 case AML_FIELD_OFFSET_OP: 513 514 opcode = AML_INT_RESERVEDFIELD_OP; 515 parser_state->aml++; 516 break; 517 518 case AML_FIELD_ACCESS_OP: 519 520 opcode = AML_INT_ACCESSFIELD_OP; 521 parser_state->aml++; 522 break; 523 524 case AML_FIELD_CONNECTION_OP: 525 526 opcode = AML_INT_CONNECTION_OP; 527 parser_state->aml++; 528 break; 529 530 case AML_FIELD_EXT_ACCESS_OP: 531 532 opcode = AML_INT_EXTACCESSFIELD_OP; 533 parser_state->aml++; 534 break; 535 536 default: 537 538 opcode = AML_INT_NAMEDFIELD_OP; 539 break; 540 } 541 542 /* Allocate a new field op */ 543 544 field = acpi_ps_alloc_op(opcode, aml); 545 if (!field) { 546 return_PTR(NULL); 547 } 548 549 /* Decode the field type */ 550 551 ASL_CV_CAPTURE_COMMENTS_ONLY(parser_state); 552 switch (opcode) { 553 case AML_INT_NAMEDFIELD_OP: 554 555 /* Get the 4-character name */ 556 557 ACPI_MOVE_32_TO_32(&name, parser_state->aml); 558 acpi_ps_set_name(field, name); 559 parser_state->aml += ACPI_NAME_SIZE; 560 561 ASL_CV_CAPTURE_COMMENTS_ONLY(parser_state); 562 563 #ifdef ACPI_ASL_COMPILER 564 /* 565 * Because the package length isn't represented as a parse tree object, 566 * take comments surrounding this and add to the previously created 567 * parse node. 568 */ 569 if (field->common.inline_comment) { 570 field->common.name_comment = 571 field->common.inline_comment; 572 } 573 field->common.inline_comment = acpi_gbl_current_inline_comment; 574 acpi_gbl_current_inline_comment = NULL; 575 #endif 576 577 /* Get the length which is encoded as a package length */ 578 579 field->common.value.size = 580 acpi_ps_get_next_package_length(parser_state); 581 break; 582 583 case AML_INT_RESERVEDFIELD_OP: 584 585 /* Get the length which is encoded as a package length */ 586 587 field->common.value.size = 588 acpi_ps_get_next_package_length(parser_state); 589 break; 590 591 case AML_INT_ACCESSFIELD_OP: 592 case AML_INT_EXTACCESSFIELD_OP: 593 594 /* 595 * Get access_type and access_attrib and merge into the field Op 596 * access_type is first operand, access_attribute is second. stuff 597 * these bytes into the node integer value for convenience. 598 */ 599 600 /* Get the two bytes (Type/Attribute) */ 601 602 access_type = ACPI_GET8(parser_state->aml); 603 parser_state->aml++; 604 access_attribute = ACPI_GET8(parser_state->aml); 605 parser_state->aml++; 606 607 field->common.value.integer = (u8)access_type; 608 field->common.value.integer |= (u16)(access_attribute << 8); 609 610 /* This opcode has a third byte, access_length */ 611 612 if (opcode == AML_INT_EXTACCESSFIELD_OP) { 613 access_length = ACPI_GET8(parser_state->aml); 614 parser_state->aml++; 615 616 field->common.value.integer |= 617 (u32)(access_length << 16); 618 } 619 break; 620 621 case AML_INT_CONNECTION_OP: 622 623 /* 624 * Argument for Connection operator can be either a Buffer 625 * (resource descriptor), or a name_string. 626 */ 627 aml = parser_state->aml; 628 if (ACPI_GET8(parser_state->aml) == AML_BUFFER_OP) { 629 parser_state->aml++; 630 631 ASL_CV_CAPTURE_COMMENTS_ONLY(parser_state); 632 pkg_end = parser_state->aml; 633 pkg_length = 634 acpi_ps_get_next_package_length(parser_state); 635 pkg_end += pkg_length; 636 637 ASL_CV_CAPTURE_COMMENTS_ONLY(parser_state); 638 if (parser_state->aml < pkg_end) { 639 640 /* Non-empty list */ 641 642 arg = 643 acpi_ps_alloc_op(AML_INT_BYTELIST_OP, aml); 644 if (!arg) { 645 acpi_ps_free_op(field); 646 return_PTR(NULL); 647 } 648 649 /* Get the actual buffer length argument */ 650 651 opcode = ACPI_GET8(parser_state->aml); 652 parser_state->aml++; 653 654 ASL_CV_CAPTURE_COMMENTS_ONLY(parser_state); 655 switch (opcode) { 656 case AML_BYTE_OP: /* AML_BYTEDATA_ARG */ 657 658 buffer_length = 659 ACPI_GET8(parser_state->aml); 660 parser_state->aml += 1; 661 break; 662 663 case AML_WORD_OP: /* AML_WORDDATA_ARG */ 664 665 buffer_length = 666 ACPI_GET16(parser_state->aml); 667 parser_state->aml += 2; 668 break; 669 670 case AML_DWORD_OP: /* AML_DWORDATA_ARG */ 671 672 buffer_length = 673 ACPI_GET32(parser_state->aml); 674 parser_state->aml += 4; 675 break; 676 677 default: 678 679 buffer_length = 0; 680 break; 681 } 682 683 /* Fill in bytelist data */ 684 685 ASL_CV_CAPTURE_COMMENTS_ONLY(parser_state); 686 arg->named.value.size = buffer_length; 687 arg->named.data = parser_state->aml; 688 } 689 690 /* Skip to End of byte data */ 691 692 parser_state->aml = pkg_end; 693 } else { 694 arg = acpi_ps_alloc_op(AML_INT_NAMEPATH_OP, aml); 695 if (!arg) { 696 acpi_ps_free_op(field); 697 return_PTR(NULL); 698 } 699 700 /* Get the Namestring argument */ 701 702 arg->common.value.name = 703 acpi_ps_get_next_namestring(parser_state); 704 } 705 706 /* Link the buffer/namestring to parent (CONNECTION_OP) */ 707 708 acpi_ps_append_arg(field, arg); 709 break; 710 711 default: 712 713 /* Opcode was set in previous switch */ 714 break; 715 } 716 717 return_PTR(field); 718 } 719 720 /******************************************************************************* 721 * 722 * FUNCTION: acpi_ps_get_next_arg 723 * 724 * PARAMETERS: walk_state - Current state 725 * parser_state - Current parser state object 726 * arg_type - The argument type (AML_*_ARG) 727 * return_arg - Where the next arg is returned 728 * 729 * RETURN: Status, and an op object containing the next argument. 730 * 731 * DESCRIPTION: Get next argument (including complex list arguments that require 732 * pushing the parser stack) 733 * 734 ******************************************************************************/ 735 736 acpi_status 737 acpi_ps_get_next_arg(struct acpi_walk_state *walk_state, 738 struct acpi_parse_state *parser_state, 739 u32 arg_type, union acpi_parse_object **return_arg) 740 { 741 union acpi_parse_object *arg = NULL; 742 union acpi_parse_object *prev = NULL; 743 union acpi_parse_object *field; 744 u32 subop; 745 acpi_status status = AE_OK; 746 747 ACPI_FUNCTION_TRACE_PTR(ps_get_next_arg, parser_state); 748 749 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, 750 "Expected argument type ARGP: %s (%2.2X)\n", 751 acpi_ut_get_argument_type_name(arg_type), arg_type)); 752 753 switch (arg_type) { 754 case ARGP_BYTEDATA: 755 case ARGP_WORDDATA: 756 case ARGP_DWORDDATA: 757 case ARGP_CHARLIST: 758 case ARGP_NAME: 759 case ARGP_NAMESTRING: 760 761 /* Constants, strings, and namestrings are all the same size */ 762 763 arg = acpi_ps_alloc_op(AML_BYTE_OP, parser_state->aml); 764 if (!arg) { 765 return_ACPI_STATUS(AE_NO_MEMORY); 766 } 767 768 acpi_ps_get_next_simple_arg(parser_state, arg_type, arg); 769 break; 770 771 case ARGP_PKGLENGTH: 772 773 /* Package length, nothing returned */ 774 775 parser_state->pkg_end = 776 acpi_ps_get_next_package_end(parser_state); 777 break; 778 779 case ARGP_FIELDLIST: 780 781 if (parser_state->aml < parser_state->pkg_end) { 782 783 /* Non-empty list */ 784 785 while (parser_state->aml < parser_state->pkg_end) { 786 field = acpi_ps_get_next_field(parser_state); 787 if (!field) { 788 return_ACPI_STATUS(AE_NO_MEMORY); 789 } 790 791 if (prev) { 792 prev->common.next = field; 793 } else { 794 arg = field; 795 } 796 prev = field; 797 } 798 799 /* Skip to End of byte data */ 800 801 parser_state->aml = parser_state->pkg_end; 802 } 803 break; 804 805 case ARGP_BYTELIST: 806 807 if (parser_state->aml < parser_state->pkg_end) { 808 809 /* Non-empty list */ 810 811 arg = acpi_ps_alloc_op(AML_INT_BYTELIST_OP, 812 parser_state->aml); 813 if (!arg) { 814 return_ACPI_STATUS(AE_NO_MEMORY); 815 } 816 817 /* Fill in bytelist data */ 818 819 arg->common.value.size = (u32) 820 ACPI_PTR_DIFF(parser_state->pkg_end, 821 parser_state->aml); 822 arg->named.data = parser_state->aml; 823 824 /* Skip to End of byte data */ 825 826 parser_state->aml = parser_state->pkg_end; 827 } 828 break; 829 830 case ARGP_SIMPLENAME: 831 case ARGP_NAME_OR_REF: 832 833 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, 834 "**** SimpleName/NameOrRef: %s (%2.2X)\n", 835 acpi_ut_get_argument_type_name(arg_type), 836 arg_type)); 837 838 subop = acpi_ps_peek_opcode(parser_state); 839 if (subop == 0 || 840 acpi_ps_is_leading_char(subop) || 841 ACPI_IS_ROOT_PREFIX(subop) || 842 ACPI_IS_PARENT_PREFIX(subop)) { 843 844 /* null_name or name_string */ 845 846 arg = 847 acpi_ps_alloc_op(AML_INT_NAMEPATH_OP, 848 parser_state->aml); 849 if (!arg) { 850 return_ACPI_STATUS(AE_NO_MEMORY); 851 } 852 853 status = 854 acpi_ps_get_next_namepath(walk_state, parser_state, 855 arg, 856 ACPI_NOT_METHOD_CALL); 857 } else { 858 /* Single complex argument, nothing returned */ 859 860 walk_state->arg_count = 1; 861 } 862 break; 863 864 case ARGP_TARGET: 865 case ARGP_SUPERNAME: 866 867 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, 868 "**** Target/Supername: %s (%2.2X)\n", 869 acpi_ut_get_argument_type_name(arg_type), 870 arg_type)); 871 872 subop = acpi_ps_peek_opcode(parser_state); 873 if (subop == 0 || 874 acpi_ps_is_leading_char(subop) || 875 ACPI_IS_ROOT_PREFIX(subop) || 876 ACPI_IS_PARENT_PREFIX(subop)) { 877 878 /* NULL target (zero). Convert to a NULL namepath */ 879 880 arg = 881 acpi_ps_alloc_op(AML_INT_NAMEPATH_OP, 882 parser_state->aml); 883 if (!arg) { 884 return_ACPI_STATUS(AE_NO_MEMORY); 885 } 886 887 status = 888 acpi_ps_get_next_namepath(walk_state, parser_state, 889 arg, 890 ACPI_POSSIBLE_METHOD_CALL); 891 892 if (arg->common.aml_opcode == AML_INT_METHODCALL_OP) { 893 acpi_ps_free_op(arg); 894 arg = NULL; 895 walk_state->arg_count = 1; 896 } 897 } else { 898 /* Single complex argument, nothing returned */ 899 900 walk_state->arg_count = 1; 901 } 902 break; 903 904 case ARGP_DATAOBJ: 905 case ARGP_TERMARG: 906 907 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, 908 "**** TermArg/DataObj: %s (%2.2X)\n", 909 acpi_ut_get_argument_type_name(arg_type), 910 arg_type)); 911 912 /* Single complex argument, nothing returned */ 913 914 walk_state->arg_count = 1; 915 break; 916 917 case ARGP_DATAOBJLIST: 918 case ARGP_TERMLIST: 919 case ARGP_OBJLIST: 920 921 if (parser_state->aml < parser_state->pkg_end) { 922 923 /* Non-empty list of variable arguments, nothing returned */ 924 925 walk_state->arg_count = ACPI_VAR_ARGS; 926 } 927 break; 928 929 default: 930 931 ACPI_ERROR((AE_INFO, "Invalid ArgType: 0x%X", arg_type)); 932 status = AE_AML_OPERAND_TYPE; 933 break; 934 } 935 936 *return_arg = arg; 937 return_ACPI_STATUS(status); 938 } 939