Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: psloop - Main AML parse loop |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
Bob Moore | 6c9deb7 | 2007-02-02 19:48:24 +0300 | [diff] [blame] | 8 | * Copyright (C) 2000 - 2007, R. Byron Moore |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 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 | |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 44 | /* |
Mikhail Kouzmich | 4d0b4af | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 45 | * Parse the AML and build an operation tree as most interpreters, (such as |
| 46 | * Perl) do. Parsing is done by hand rather than with a YACC generated parser |
| 47 | * to tightly constrain stack and dynamic memory usage. Parsing is kept |
| 48 | * flexible and the code fairly compact by parsing based on a list of AML |
| 49 | * opcode templates in aml_op_info[]. |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 50 | */ |
| 51 | |
| 52 | #include <acpi/acpi.h> |
| 53 | #include <acpi/acparser.h> |
| 54 | #include <acpi/acdispat.h> |
| 55 | #include <acpi/amlcode.h> |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 56 | |
| 57 | #define _COMPONENT ACPI_PARSER |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 58 | ACPI_MODULE_NAME("psloop") |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 59 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 60 | static u32 acpi_gbl_depth = 0; |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 61 | |
Mikhail Kouzmich | 4d0b4af | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 62 | /* Local prototypes */ |
| 63 | |
| 64 | static acpi_status acpi_ps_get_aml_opcode(struct acpi_walk_state *walk_state); |
| 65 | |
| 66 | static acpi_status |
| 67 | acpi_ps_build_named_op(struct acpi_walk_state *walk_state, |
| 68 | u8 * aml_op_start, |
| 69 | union acpi_parse_object *unnamed_op, |
| 70 | union acpi_parse_object **op); |
| 71 | |
| 72 | static acpi_status |
| 73 | acpi_ps_create_op(struct acpi_walk_state *walk_state, |
| 74 | u8 * aml_op_start, union acpi_parse_object **new_op); |
| 75 | |
| 76 | static acpi_status |
| 77 | acpi_ps_get_arguments(struct acpi_walk_state *walk_state, |
| 78 | u8 * aml_op_start, union acpi_parse_object *op); |
| 79 | |
| 80 | static acpi_status |
| 81 | acpi_ps_complete_op(struct acpi_walk_state *walk_state, |
| 82 | union acpi_parse_object **op, acpi_status status); |
| 83 | |
| 84 | static acpi_status |
| 85 | acpi_ps_complete_final_op(struct acpi_walk_state *walk_state, |
| 86 | union acpi_parse_object *op, acpi_status status); |
| 87 | |
| 88 | /******************************************************************************* |
| 89 | * |
| 90 | * FUNCTION: acpi_ps_get_aml_opcode |
| 91 | * |
| 92 | * PARAMETERS: walk_state - Current state |
| 93 | * |
| 94 | * RETURN: Status |
| 95 | * |
| 96 | * DESCRIPTION: Extract the next AML opcode from the input stream. |
| 97 | * |
| 98 | ******************************************************************************/ |
| 99 | |
| 100 | static acpi_status acpi_ps_get_aml_opcode(struct acpi_walk_state *walk_state) |
| 101 | { |
| 102 | |
| 103 | ACPI_FUNCTION_TRACE_PTR(ps_get_aml_opcode, walk_state); |
| 104 | |
| 105 | walk_state->aml_offset = |
| 106 | (u32) ACPI_PTR_DIFF(walk_state->parser_state.aml, |
| 107 | walk_state->parser_state.aml_start); |
| 108 | walk_state->opcode = acpi_ps_peek_opcode(&(walk_state->parser_state)); |
| 109 | |
| 110 | /* |
| 111 | * First cut to determine what we have found: |
| 112 | * 1) A valid AML opcode |
| 113 | * 2) A name string |
| 114 | * 3) An unknown/invalid opcode |
| 115 | */ |
| 116 | walk_state->op_info = acpi_ps_get_opcode_info(walk_state->opcode); |
| 117 | |
| 118 | switch (walk_state->op_info->class) { |
| 119 | case AML_CLASS_ASCII: |
| 120 | case AML_CLASS_PREFIX: |
| 121 | /* |
| 122 | * Starts with a valid prefix or ASCII char, this is a name |
| 123 | * string. Convert the bare name string to a namepath. |
| 124 | */ |
| 125 | walk_state->opcode = AML_INT_NAMEPATH_OP; |
| 126 | walk_state->arg_types = ARGP_NAMESTRING; |
| 127 | break; |
| 128 | |
| 129 | case AML_CLASS_UNKNOWN: |
| 130 | |
| 131 | /* The opcode is unrecognized. Just skip unknown opcodes */ |
| 132 | |
| 133 | ACPI_ERROR((AE_INFO, |
| 134 | "Found unknown opcode %X at AML address %p offset %X, ignoring", |
| 135 | walk_state->opcode, walk_state->parser_state.aml, |
| 136 | walk_state->aml_offset)); |
| 137 | |
| 138 | ACPI_DUMP_BUFFER(walk_state->parser_state.aml, 128); |
| 139 | |
| 140 | /* Assume one-byte bad opcode */ |
| 141 | |
| 142 | walk_state->parser_state.aml++; |
| 143 | return_ACPI_STATUS(AE_CTRL_PARSE_CONTINUE); |
| 144 | |
| 145 | default: |
| 146 | |
| 147 | /* Found opcode info, this is a normal opcode */ |
| 148 | |
| 149 | walk_state->parser_state.aml += |
| 150 | acpi_ps_get_opcode_size(walk_state->opcode); |
| 151 | walk_state->arg_types = walk_state->op_info->parse_args; |
| 152 | break; |
| 153 | } |
| 154 | |
| 155 | return_ACPI_STATUS(AE_OK); |
| 156 | } |
| 157 | |
| 158 | /******************************************************************************* |
| 159 | * |
| 160 | * FUNCTION: acpi_ps_build_named_op |
| 161 | * |
| 162 | * PARAMETERS: walk_state - Current state |
| 163 | * aml_op_start - Begin of named Op in AML |
| 164 | * unnamed_op - Early Op (not a named Op) |
| 165 | * Op - Returned Op |
| 166 | * |
| 167 | * RETURN: Status |
| 168 | * |
| 169 | * DESCRIPTION: Parse a named Op |
| 170 | * |
| 171 | ******************************************************************************/ |
| 172 | |
| 173 | static acpi_status |
| 174 | acpi_ps_build_named_op(struct acpi_walk_state *walk_state, |
| 175 | u8 * aml_op_start, |
| 176 | union acpi_parse_object *unnamed_op, |
| 177 | union acpi_parse_object **op) |
| 178 | { |
| 179 | acpi_status status = AE_OK; |
| 180 | union acpi_parse_object *arg = NULL; |
| 181 | |
| 182 | ACPI_FUNCTION_TRACE_PTR(ps_build_named_op, walk_state); |
| 183 | |
| 184 | unnamed_op->common.value.arg = NULL; |
| 185 | unnamed_op->common.aml_opcode = walk_state->opcode; |
| 186 | |
| 187 | /* |
| 188 | * Get and append arguments until we find the node that contains |
| 189 | * the name (the type ARGP_NAME). |
| 190 | */ |
| 191 | while (GET_CURRENT_ARG_TYPE(walk_state->arg_types) && |
| 192 | (GET_CURRENT_ARG_TYPE(walk_state->arg_types) != ARGP_NAME)) { |
| 193 | status = |
| 194 | acpi_ps_get_next_arg(walk_state, |
| 195 | &(walk_state->parser_state), |
| 196 | GET_CURRENT_ARG_TYPE(walk_state-> |
| 197 | arg_types), &arg); |
| 198 | if (ACPI_FAILURE(status)) { |
| 199 | return_ACPI_STATUS(status); |
| 200 | } |
| 201 | |
| 202 | acpi_ps_append_arg(unnamed_op, arg); |
| 203 | INCREMENT_ARG_LIST(walk_state->arg_types); |
| 204 | } |
| 205 | |
| 206 | /* |
| 207 | * Make sure that we found a NAME and didn't run out of arguments |
| 208 | */ |
| 209 | if (!GET_CURRENT_ARG_TYPE(walk_state->arg_types)) { |
| 210 | return_ACPI_STATUS(AE_AML_NO_OPERAND); |
| 211 | } |
| 212 | |
| 213 | /* We know that this arg is a name, move to next arg */ |
| 214 | |
| 215 | INCREMENT_ARG_LIST(walk_state->arg_types); |
| 216 | |
| 217 | /* |
| 218 | * Find the object. This will either insert the object into |
| 219 | * the namespace or simply look it up |
| 220 | */ |
| 221 | walk_state->op = NULL; |
| 222 | |
| 223 | status = walk_state->descending_callback(walk_state, op); |
| 224 | if (ACPI_FAILURE(status)) { |
| 225 | ACPI_EXCEPTION((AE_INFO, status, "During name lookup/catalog")); |
| 226 | return_ACPI_STATUS(status); |
| 227 | } |
| 228 | |
Valery Podrezov | 9bc75cf | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 229 | if (!*op) { |
Mikhail Kouzmich | 4d0b4af | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 230 | return_ACPI_STATUS(AE_CTRL_PARSE_CONTINUE); |
| 231 | } |
| 232 | |
| 233 | status = acpi_ps_next_parse_state(walk_state, *op, status); |
| 234 | if (ACPI_FAILURE(status)) { |
| 235 | if (status == AE_CTRL_PENDING) { |
| 236 | return_ACPI_STATUS(AE_CTRL_PARSE_PENDING); |
| 237 | } |
| 238 | return_ACPI_STATUS(status); |
| 239 | } |
| 240 | |
| 241 | acpi_ps_append_arg(*op, unnamed_op->common.value.arg); |
| 242 | acpi_gbl_depth++; |
| 243 | |
| 244 | if ((*op)->common.aml_opcode == AML_REGION_OP) { |
| 245 | /* |
| 246 | * Defer final parsing of an operation_region body, because we don't |
| 247 | * have enough info in the first pass to parse it correctly (i.e., |
| 248 | * there may be method calls within the term_arg elements of the body.) |
| 249 | * |
| 250 | * However, we must continue parsing because the opregion is not a |
| 251 | * standalone package -- we don't know where the end is at this point. |
| 252 | * |
| 253 | * (Length is unknown until parse of the body complete) |
| 254 | */ |
| 255 | (*op)->named.data = aml_op_start; |
| 256 | (*op)->named.length = 0; |
| 257 | } |
| 258 | |
| 259 | return_ACPI_STATUS(AE_OK); |
| 260 | } |
| 261 | |
| 262 | /******************************************************************************* |
| 263 | * |
| 264 | * FUNCTION: acpi_ps_create_op |
| 265 | * |
| 266 | * PARAMETERS: walk_state - Current state |
| 267 | * aml_op_start - Op start in AML |
| 268 | * new_op - Returned Op |
| 269 | * |
| 270 | * RETURN: Status |
| 271 | * |
| 272 | * DESCRIPTION: Get Op from AML |
| 273 | * |
| 274 | ******************************************************************************/ |
| 275 | |
| 276 | static acpi_status |
| 277 | acpi_ps_create_op(struct acpi_walk_state *walk_state, |
| 278 | u8 * aml_op_start, union acpi_parse_object **new_op) |
| 279 | { |
| 280 | acpi_status status = AE_OK; |
| 281 | union acpi_parse_object *op; |
| 282 | union acpi_parse_object *named_op = NULL; |
| 283 | |
| 284 | ACPI_FUNCTION_TRACE_PTR(ps_create_op, walk_state); |
| 285 | |
| 286 | status = acpi_ps_get_aml_opcode(walk_state); |
| 287 | if (status == AE_CTRL_PARSE_CONTINUE) { |
| 288 | return_ACPI_STATUS(AE_CTRL_PARSE_CONTINUE); |
| 289 | } |
| 290 | |
| 291 | /* Create Op structure and append to parent's argument list */ |
| 292 | |
| 293 | walk_state->op_info = acpi_ps_get_opcode_info(walk_state->opcode); |
| 294 | op = acpi_ps_alloc_op(walk_state->opcode); |
| 295 | if (!op) { |
| 296 | return_ACPI_STATUS(AE_NO_MEMORY); |
| 297 | } |
| 298 | |
| 299 | if (walk_state->op_info->flags & AML_NAMED) { |
| 300 | status = |
| 301 | acpi_ps_build_named_op(walk_state, aml_op_start, op, |
| 302 | &named_op); |
| 303 | acpi_ps_free_op(op); |
| 304 | if (ACPI_FAILURE(status)) { |
| 305 | return_ACPI_STATUS(status); |
| 306 | } |
| 307 | |
| 308 | *new_op = named_op; |
| 309 | return_ACPI_STATUS(AE_OK); |
| 310 | } |
| 311 | |
| 312 | /* Not a named opcode, just allocate Op and append to parent */ |
| 313 | |
| 314 | if (walk_state->op_info->flags & AML_CREATE) { |
| 315 | /* |
| 316 | * Backup to beginning of create_xXXfield declaration |
| 317 | * body_length is unknown until we parse the body |
| 318 | */ |
| 319 | op->named.data = aml_op_start; |
| 320 | op->named.length = 0; |
| 321 | } |
| 322 | |
| 323 | acpi_ps_append_arg(acpi_ps_get_parent_scope |
| 324 | (&(walk_state->parser_state)), op); |
| 325 | |
| 326 | if (walk_state->descending_callback != NULL) { |
| 327 | /* |
| 328 | * Find the object. This will either insert the object into |
| 329 | * the namespace or simply look it up |
| 330 | */ |
| 331 | walk_state->op = *new_op = op; |
| 332 | |
| 333 | status = walk_state->descending_callback(walk_state, &op); |
| 334 | status = acpi_ps_next_parse_state(walk_state, op, status); |
| 335 | if (status == AE_CTRL_PENDING) { |
| 336 | status = AE_CTRL_PARSE_PENDING; |
| 337 | } |
| 338 | } |
| 339 | |
| 340 | return_ACPI_STATUS(status); |
| 341 | } |
| 342 | |
| 343 | /******************************************************************************* |
| 344 | * |
| 345 | * FUNCTION: acpi_ps_get_arguments |
| 346 | * |
| 347 | * PARAMETERS: walk_state - Current state |
| 348 | * aml_op_start - Op start in AML |
| 349 | * Op - Current Op |
| 350 | * |
| 351 | * RETURN: Status |
| 352 | * |
| 353 | * DESCRIPTION: Get arguments for passed Op. |
| 354 | * |
| 355 | ******************************************************************************/ |
| 356 | |
| 357 | static acpi_status |
| 358 | acpi_ps_get_arguments(struct acpi_walk_state *walk_state, |
| 359 | u8 * aml_op_start, union acpi_parse_object *op) |
| 360 | { |
| 361 | acpi_status status = AE_OK; |
| 362 | union acpi_parse_object *arg = NULL; |
| 363 | |
| 364 | ACPI_FUNCTION_TRACE_PTR(ps_get_arguments, walk_state); |
| 365 | |
| 366 | switch (op->common.aml_opcode) { |
| 367 | case AML_BYTE_OP: /* AML_BYTEDATA_ARG */ |
| 368 | case AML_WORD_OP: /* AML_WORDDATA_ARG */ |
| 369 | case AML_DWORD_OP: /* AML_DWORDATA_ARG */ |
| 370 | case AML_QWORD_OP: /* AML_QWORDATA_ARG */ |
| 371 | case AML_STRING_OP: /* AML_ASCIICHARLIST_ARG */ |
| 372 | |
| 373 | /* Fill in constant or string argument directly */ |
| 374 | |
| 375 | acpi_ps_get_next_simple_arg(&(walk_state->parser_state), |
| 376 | GET_CURRENT_ARG_TYPE(walk_state-> |
| 377 | arg_types), |
| 378 | op); |
| 379 | break; |
| 380 | |
| 381 | case AML_INT_NAMEPATH_OP: /* AML_NAMESTRING_ARG */ |
| 382 | |
| 383 | status = |
| 384 | acpi_ps_get_next_namepath(walk_state, |
| 385 | &(walk_state->parser_state), op, |
| 386 | 1); |
| 387 | if (ACPI_FAILURE(status)) { |
| 388 | return_ACPI_STATUS(status); |
| 389 | } |
| 390 | |
| 391 | walk_state->arg_types = 0; |
| 392 | break; |
| 393 | |
| 394 | default: |
| 395 | /* |
| 396 | * Op is not a constant or string, append each argument to the Op |
| 397 | */ |
| 398 | while (GET_CURRENT_ARG_TYPE(walk_state->arg_types) |
| 399 | && !walk_state->arg_count) { |
| 400 | walk_state->aml_offset = |
| 401 | (u32) ACPI_PTR_DIFF(walk_state->parser_state.aml, |
| 402 | walk_state->parser_state. |
| 403 | aml_start); |
| 404 | |
| 405 | status = |
| 406 | acpi_ps_get_next_arg(walk_state, |
| 407 | &(walk_state->parser_state), |
| 408 | GET_CURRENT_ARG_TYPE |
| 409 | (walk_state->arg_types), &arg); |
| 410 | if (ACPI_FAILURE(status)) { |
| 411 | return_ACPI_STATUS(status); |
| 412 | } |
| 413 | |
| 414 | if (arg) { |
| 415 | arg->common.aml_offset = walk_state->aml_offset; |
| 416 | acpi_ps_append_arg(op, arg); |
| 417 | } |
| 418 | |
| 419 | INCREMENT_ARG_LIST(walk_state->arg_types); |
| 420 | } |
| 421 | |
| 422 | /* Special processing for certain opcodes */ |
| 423 | |
| 424 | /* TBD (remove): Temporary mechanism to disable this code if needed */ |
| 425 | |
| 426 | #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE |
| 427 | |
| 428 | if ((walk_state->pass_number <= ACPI_IMODE_LOAD_PASS1) && |
| 429 | ((walk_state->parse_flags & ACPI_PARSE_DISASSEMBLE) == 0)) { |
| 430 | /* |
| 431 | * We want to skip If/Else/While constructs during Pass1 because we |
| 432 | * want to actually conditionally execute the code during Pass2. |
| 433 | * |
| 434 | * Except for disassembly, where we always want to walk the |
| 435 | * If/Else/While packages |
| 436 | */ |
| 437 | switch (op->common.aml_opcode) { |
| 438 | case AML_IF_OP: |
| 439 | case AML_ELSE_OP: |
| 440 | case AML_WHILE_OP: |
| 441 | |
| 442 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, |
| 443 | "Pass1: Skipping an If/Else/While body\n")); |
| 444 | |
| 445 | /* Skip body of if/else/while in pass 1 */ |
| 446 | |
| 447 | walk_state->parser_state.aml = |
| 448 | walk_state->parser_state.pkg_end; |
| 449 | walk_state->arg_count = 0; |
| 450 | break; |
| 451 | |
| 452 | default: |
| 453 | break; |
| 454 | } |
| 455 | } |
| 456 | #endif |
| 457 | |
| 458 | switch (op->common.aml_opcode) { |
| 459 | case AML_METHOD_OP: |
| 460 | /* |
| 461 | * Skip parsing of control method because we don't have enough |
| 462 | * info in the first pass to parse it correctly. |
| 463 | * |
| 464 | * Save the length and address of the body |
| 465 | */ |
| 466 | op->named.data = walk_state->parser_state.aml; |
| 467 | op->named.length = (u32) |
| 468 | (walk_state->parser_state.pkg_end - |
| 469 | walk_state->parser_state.aml); |
| 470 | |
| 471 | /* Skip body of method */ |
| 472 | |
| 473 | walk_state->parser_state.aml = |
| 474 | walk_state->parser_state.pkg_end; |
| 475 | walk_state->arg_count = 0; |
| 476 | break; |
| 477 | |
| 478 | case AML_BUFFER_OP: |
| 479 | case AML_PACKAGE_OP: |
| 480 | case AML_VAR_PACKAGE_OP: |
| 481 | |
| 482 | if ((op->common.parent) && |
| 483 | (op->common.parent->common.aml_opcode == |
| 484 | AML_NAME_OP) |
| 485 | && (walk_state->pass_number <= |
| 486 | ACPI_IMODE_LOAD_PASS2)) { |
| 487 | /* |
| 488 | * Skip parsing of Buffers and Packages because we don't have |
| 489 | * enough info in the first pass to parse them correctly. |
| 490 | */ |
| 491 | op->named.data = aml_op_start; |
| 492 | op->named.length = (u32) |
| 493 | (walk_state->parser_state.pkg_end - |
| 494 | aml_op_start); |
| 495 | |
| 496 | /* Skip body */ |
| 497 | |
| 498 | walk_state->parser_state.aml = |
| 499 | walk_state->parser_state.pkg_end; |
| 500 | walk_state->arg_count = 0; |
| 501 | } |
| 502 | break; |
| 503 | |
| 504 | case AML_WHILE_OP: |
| 505 | |
| 506 | if (walk_state->control_state) { |
| 507 | walk_state->control_state->control.package_end = |
| 508 | walk_state->parser_state.pkg_end; |
| 509 | } |
| 510 | break; |
| 511 | |
| 512 | default: |
| 513 | |
| 514 | /* No action for all other opcodes */ |
| 515 | break; |
| 516 | } |
| 517 | |
| 518 | break; |
| 519 | } |
| 520 | |
| 521 | return_ACPI_STATUS(AE_OK); |
| 522 | } |
| 523 | |
| 524 | /******************************************************************************* |
| 525 | * |
| 526 | * FUNCTION: acpi_ps_complete_op |
| 527 | * |
| 528 | * PARAMETERS: walk_state - Current state |
| 529 | * Op - Returned Op |
| 530 | * Status - Parse status before complete Op |
| 531 | * |
| 532 | * RETURN: Status |
| 533 | * |
| 534 | * DESCRIPTION: Complete Op |
| 535 | * |
| 536 | ******************************************************************************/ |
| 537 | |
| 538 | static acpi_status |
| 539 | acpi_ps_complete_op(struct acpi_walk_state *walk_state, |
| 540 | union acpi_parse_object **op, acpi_status status) |
| 541 | { |
| 542 | acpi_status status2; |
| 543 | |
| 544 | ACPI_FUNCTION_TRACE_PTR(ps_complete_op, walk_state); |
| 545 | |
| 546 | /* |
| 547 | * Finished one argument of the containing scope |
| 548 | */ |
| 549 | walk_state->parser_state.scope->parse_scope.arg_count--; |
| 550 | |
| 551 | /* Close this Op (will result in parse subtree deletion) */ |
| 552 | |
| 553 | status2 = acpi_ps_complete_this_op(walk_state, *op); |
| 554 | if (ACPI_FAILURE(status2)) { |
| 555 | return_ACPI_STATUS(status2); |
| 556 | } |
| 557 | |
| 558 | *op = NULL; |
| 559 | |
| 560 | switch (status) { |
| 561 | case AE_OK: |
| 562 | break; |
| 563 | |
| 564 | case AE_CTRL_TRANSFER: |
| 565 | |
| 566 | /* We are about to transfer to a called method */ |
| 567 | |
| 568 | walk_state->prev_op = NULL; |
| 569 | walk_state->prev_arg_types = walk_state->arg_types; |
| 570 | return_ACPI_STATUS(status); |
| 571 | |
| 572 | case AE_CTRL_END: |
| 573 | |
| 574 | acpi_ps_pop_scope(&(walk_state->parser_state), op, |
| 575 | &walk_state->arg_types, |
| 576 | &walk_state->arg_count); |
| 577 | |
| 578 | if (*op) { |
| 579 | walk_state->op = *op; |
| 580 | walk_state->op_info = |
| 581 | acpi_ps_get_opcode_info((*op)->common.aml_opcode); |
| 582 | walk_state->opcode = (*op)->common.aml_opcode; |
| 583 | |
| 584 | status = walk_state->ascending_callback(walk_state); |
| 585 | status = |
| 586 | acpi_ps_next_parse_state(walk_state, *op, status); |
| 587 | |
| 588 | status2 = acpi_ps_complete_this_op(walk_state, *op); |
| 589 | if (ACPI_FAILURE(status2)) { |
| 590 | return_ACPI_STATUS(status2); |
| 591 | } |
| 592 | } |
| 593 | |
| 594 | status = AE_OK; |
| 595 | break; |
| 596 | |
| 597 | case AE_CTRL_BREAK: |
| 598 | case AE_CTRL_CONTINUE: |
| 599 | |
| 600 | /* Pop off scopes until we find the While */ |
| 601 | |
| 602 | while (!(*op) || ((*op)->common.aml_opcode != AML_WHILE_OP)) { |
| 603 | acpi_ps_pop_scope(&(walk_state->parser_state), op, |
| 604 | &walk_state->arg_types, |
| 605 | &walk_state->arg_count); |
| 606 | |
| 607 | if ((*op)->common.aml_opcode != AML_WHILE_OP) { |
| 608 | status2 = acpi_ds_result_stack_pop(walk_state); |
| 609 | if (ACPI_FAILURE(status2)) { |
| 610 | return_ACPI_STATUS(status2); |
| 611 | } |
| 612 | } |
| 613 | } |
| 614 | |
| 615 | /* Close this iteration of the While loop */ |
| 616 | |
| 617 | walk_state->op = *op; |
| 618 | walk_state->op_info = |
| 619 | acpi_ps_get_opcode_info((*op)->common.aml_opcode); |
| 620 | walk_state->opcode = (*op)->common.aml_opcode; |
| 621 | |
| 622 | status = walk_state->ascending_callback(walk_state); |
| 623 | status = acpi_ps_next_parse_state(walk_state, *op, status); |
| 624 | |
| 625 | status2 = acpi_ps_complete_this_op(walk_state, *op); |
| 626 | if (ACPI_FAILURE(status2)) { |
| 627 | return_ACPI_STATUS(status2); |
| 628 | } |
| 629 | |
| 630 | status = AE_OK; |
| 631 | break; |
| 632 | |
| 633 | case AE_CTRL_TERMINATE: |
| 634 | |
| 635 | /* Clean up */ |
| 636 | do { |
| 637 | if (*op) { |
| 638 | status2 = |
| 639 | acpi_ps_complete_this_op(walk_state, *op); |
| 640 | if (ACPI_FAILURE(status2)) { |
| 641 | return_ACPI_STATUS(status2); |
| 642 | } |
| 643 | status2 = acpi_ds_result_stack_pop(walk_state); |
| 644 | if (ACPI_FAILURE(status2)) { |
| 645 | return_ACPI_STATUS(status2); |
| 646 | } |
| 647 | |
| 648 | acpi_ut_delete_generic_state |
| 649 | (acpi_ut_pop_generic_state |
| 650 | (&walk_state->control_state)); |
| 651 | } |
| 652 | |
| 653 | acpi_ps_pop_scope(&(walk_state->parser_state), op, |
| 654 | &walk_state->arg_types, |
| 655 | &walk_state->arg_count); |
| 656 | |
| 657 | } while (*op); |
| 658 | |
| 659 | return_ACPI_STATUS(AE_OK); |
| 660 | |
| 661 | default: /* All other non-AE_OK status */ |
| 662 | |
| 663 | do { |
| 664 | if (*op) { |
| 665 | status2 = |
| 666 | acpi_ps_complete_this_op(walk_state, *op); |
| 667 | if (ACPI_FAILURE(status2)) { |
| 668 | return_ACPI_STATUS(status2); |
| 669 | } |
| 670 | } |
| 671 | |
| 672 | acpi_ps_pop_scope(&(walk_state->parser_state), op, |
| 673 | &walk_state->arg_types, |
| 674 | &walk_state->arg_count); |
| 675 | |
| 676 | } while (*op); |
| 677 | |
| 678 | #if 0 |
| 679 | /* |
| 680 | * TBD: Cleanup parse ops on error |
| 681 | */ |
| 682 | if (*op == NULL) { |
| 683 | acpi_ps_pop_scope(parser_state, op, |
| 684 | &walk_state->arg_types, |
| 685 | &walk_state->arg_count); |
| 686 | } |
| 687 | #endif |
| 688 | walk_state->prev_op = NULL; |
| 689 | walk_state->prev_arg_types = walk_state->arg_types; |
| 690 | return_ACPI_STATUS(status); |
| 691 | } |
| 692 | |
| 693 | /* This scope complete? */ |
| 694 | |
| 695 | if (acpi_ps_has_completed_scope(&(walk_state->parser_state))) { |
| 696 | acpi_ps_pop_scope(&(walk_state->parser_state), op, |
| 697 | &walk_state->arg_types, |
| 698 | &walk_state->arg_count); |
| 699 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "Popped scope, Op=%p\n", *op)); |
| 700 | } else { |
| 701 | *op = NULL; |
| 702 | } |
| 703 | |
| 704 | return_ACPI_STATUS(AE_OK); |
| 705 | } |
| 706 | |
| 707 | /******************************************************************************* |
| 708 | * |
| 709 | * FUNCTION: acpi_ps_complete_final_op |
| 710 | * |
| 711 | * PARAMETERS: walk_state - Current state |
| 712 | * Op - Current Op |
| 713 | * Status - Current parse status before complete last |
| 714 | * Op |
| 715 | * |
| 716 | * RETURN: Status |
| 717 | * |
| 718 | * DESCRIPTION: Complete last Op. |
| 719 | * |
| 720 | ******************************************************************************/ |
| 721 | |
| 722 | static acpi_status |
| 723 | acpi_ps_complete_final_op(struct acpi_walk_state *walk_state, |
| 724 | union acpi_parse_object *op, acpi_status status) |
| 725 | { |
| 726 | acpi_status status2; |
| 727 | |
| 728 | ACPI_FUNCTION_TRACE_PTR(ps_complete_final_op, walk_state); |
| 729 | |
| 730 | /* |
| 731 | * Complete the last Op (if not completed), and clear the scope stack. |
| 732 | * It is easily possible to end an AML "package" with an unbounded number |
| 733 | * of open scopes (such as when several ASL blocks are closed with |
| 734 | * sequential closing braces). We want to terminate each one cleanly. |
| 735 | */ |
| 736 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "AML package complete at Op %p\n", |
| 737 | op)); |
| 738 | do { |
| 739 | if (op) { |
| 740 | if (walk_state->ascending_callback != NULL) { |
| 741 | walk_state->op = op; |
| 742 | walk_state->op_info = |
| 743 | acpi_ps_get_opcode_info(op->common. |
| 744 | aml_opcode); |
| 745 | walk_state->opcode = op->common.aml_opcode; |
| 746 | |
| 747 | status = |
| 748 | walk_state->ascending_callback(walk_state); |
| 749 | status = |
| 750 | acpi_ps_next_parse_state(walk_state, op, |
| 751 | status); |
| 752 | if (status == AE_CTRL_PENDING) { |
| 753 | status = |
| 754 | acpi_ps_complete_op(walk_state, &op, |
| 755 | AE_OK); |
| 756 | if (ACPI_FAILURE(status)) { |
| 757 | return_ACPI_STATUS(status); |
| 758 | } |
| 759 | } |
| 760 | |
| 761 | if (status == AE_CTRL_TERMINATE) { |
| 762 | status = AE_OK; |
| 763 | |
| 764 | /* Clean up */ |
| 765 | do { |
| 766 | if (op) { |
| 767 | status2 = |
| 768 | acpi_ps_complete_this_op |
| 769 | (walk_state, op); |
| 770 | if (ACPI_FAILURE |
| 771 | (status2)) { |
| 772 | return_ACPI_STATUS |
| 773 | (status2); |
| 774 | } |
| 775 | } |
| 776 | |
| 777 | acpi_ps_pop_scope(& |
| 778 | (walk_state-> |
| 779 | parser_state), |
| 780 | &op, |
| 781 | &walk_state-> |
| 782 | arg_types, |
| 783 | &walk_state-> |
| 784 | arg_count); |
| 785 | |
| 786 | } while (op); |
| 787 | |
| 788 | return_ACPI_STATUS(status); |
| 789 | } |
| 790 | |
| 791 | else if (ACPI_FAILURE(status)) { |
| 792 | |
| 793 | /* First error is most important */ |
| 794 | |
| 795 | (void) |
| 796 | acpi_ps_complete_this_op(walk_state, |
| 797 | op); |
| 798 | return_ACPI_STATUS(status); |
| 799 | } |
| 800 | } |
| 801 | |
| 802 | status2 = acpi_ps_complete_this_op(walk_state, op); |
| 803 | if (ACPI_FAILURE(status2)) { |
| 804 | return_ACPI_STATUS(status2); |
| 805 | } |
| 806 | } |
| 807 | |
| 808 | acpi_ps_pop_scope(&(walk_state->parser_state), &op, |
| 809 | &walk_state->arg_types, |
| 810 | &walk_state->arg_count); |
| 811 | |
| 812 | } while (op); |
| 813 | |
| 814 | return_ACPI_STATUS(status); |
| 815 | } |
| 816 | |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 817 | /******************************************************************************* |
| 818 | * |
| 819 | * FUNCTION: acpi_ps_parse_loop |
| 820 | * |
| 821 | * PARAMETERS: walk_state - Current state |
| 822 | * |
| 823 | * RETURN: Status |
| 824 | * |
| 825 | * DESCRIPTION: Parse AML (pointed to by the current parser state) and return |
| 826 | * a tree of ops. |
| 827 | * |
| 828 | ******************************************************************************/ |
| 829 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 830 | acpi_status acpi_ps_parse_loop(struct acpi_walk_state *walk_state) |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 831 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 832 | acpi_status status = AE_OK; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 833 | union acpi_parse_object *op = NULL; /* current op */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 834 | struct acpi_parse_state *parser_state; |
| 835 | u8 *aml_op_start = NULL; |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 836 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 837 | ACPI_FUNCTION_TRACE_PTR(ps_parse_loop, walk_state); |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 838 | |
| 839 | if (walk_state->descending_callback == NULL) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 840 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 841 | } |
| 842 | |
| 843 | parser_state = &walk_state->parser_state; |
| 844 | walk_state->arg_types = 0; |
| 845 | |
| 846 | #if (!defined (ACPI_NO_METHOD_EXECUTION) && !defined (ACPI_CONSTANT_EVAL_ONLY)) |
| 847 | |
| 848 | if (walk_state->walk_type & ACPI_WALK_METHOD_RESTART) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 849 | |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 850 | /* We are restarting a preempted control method */ |
| 851 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 852 | if (acpi_ps_has_completed_scope(parser_state)) { |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 853 | /* |
| 854 | * We must check if a predicate to an IF or WHILE statement |
| 855 | * was just completed |
| 856 | */ |
| 857 | if ((parser_state->scope->parse_scope.op) && |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 858 | ((parser_state->scope->parse_scope.op->common. |
| 859 | aml_opcode == AML_IF_OP) |
| 860 | || (parser_state->scope->parse_scope.op->common. |
| 861 | aml_opcode == AML_WHILE_OP)) |
| 862 | && (walk_state->control_state) |
| 863 | && (walk_state->control_state->common.state == |
| 864 | ACPI_CONTROL_PREDICATE_EXECUTING)) { |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 865 | /* |
| 866 | * A predicate was just completed, get the value of the |
| 867 | * predicate and branch based on that value |
| 868 | */ |
| 869 | walk_state->op = NULL; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 870 | status = |
| 871 | acpi_ds_get_predicate_value(walk_state, |
| 872 | ACPI_TO_POINTER |
| 873 | (TRUE)); |
| 874 | if (ACPI_FAILURE(status) |
| 875 | && ((status & AE_CODE_MASK) != |
| 876 | AE_CODE_CONTROL)) { |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 877 | if (status == AE_AML_NO_RETURN_VALUE) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 878 | ACPI_EXCEPTION((AE_INFO, status, |
| 879 | "Invoked method did not return a value")); |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 880 | |
| 881 | } |
Mikhail Kouzmich | 4d0b4af | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 882 | |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 883 | ACPI_EXCEPTION((AE_INFO, status, |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 884 | "GetPredicate Failed")); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 885 | return_ACPI_STATUS(status); |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 886 | } |
| 887 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 888 | status = |
| 889 | acpi_ps_next_parse_state(walk_state, op, |
| 890 | status); |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 891 | } |
| 892 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 893 | acpi_ps_pop_scope(parser_state, &op, |
| 894 | &walk_state->arg_types, |
| 895 | &walk_state->arg_count); |
| 896 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, |
| 897 | "Popped scope, Op=%p\n", op)); |
| 898 | } else if (walk_state->prev_op) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 899 | |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 900 | /* We were in the middle of an op */ |
| 901 | |
| 902 | op = walk_state->prev_op; |
| 903 | walk_state->arg_types = walk_state->prev_arg_types; |
| 904 | } |
| 905 | } |
| 906 | #endif |
| 907 | |
| 908 | /* Iterative parsing loop, while there is more AML to process: */ |
| 909 | |
| 910 | while ((parser_state->aml < parser_state->aml_end) || (op)) { |
| 911 | aml_op_start = parser_state->aml; |
| 912 | if (!op) { |
Mikhail Kouzmich | 4d0b4af | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 913 | status = |
| 914 | acpi_ps_create_op(walk_state, aml_op_start, &op); |
| 915 | if (ACPI_FAILURE(status)) { |
| 916 | if (status == AE_CTRL_PARSE_CONTINUE) { |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 917 | continue; |
| 918 | } |
| 919 | |
Mikhail Kouzmich | 4d0b4af | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 920 | if (status == AE_CTRL_PARSE_PENDING) { |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 921 | status = AE_OK; |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 922 | } |
| 923 | |
Mikhail Kouzmich | 4d0b4af | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 924 | status = |
| 925 | acpi_ps_complete_op(walk_state, &op, |
| 926 | status); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 927 | if (ACPI_FAILURE(status)) { |
Mikhail Kouzmich | 4d0b4af | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 928 | return_ACPI_STATUS(status); |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 929 | } |
| 930 | |
Mikhail Kouzmich | 4d0b4af | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 931 | continue; |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 932 | } |
| 933 | |
| 934 | op->common.aml_offset = walk_state->aml_offset; |
| 935 | |
| 936 | if (walk_state->op_info) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 937 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 938 | "Opcode %4.4X [%s] Op %p Aml %p AmlOffset %5.5X\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 939 | (u32) op->common.aml_opcode, |
| 940 | walk_state->op_info->name, op, |
| 941 | parser_state->aml, |
| 942 | op->common.aml_offset)); |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 943 | } |
| 944 | } |
| 945 | |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 946 | /* |
| 947 | * Start arg_count at zero because we don't know if there are |
| 948 | * any args yet |
| 949 | */ |
| 950 | walk_state->arg_count = 0; |
| 951 | |
| 952 | /* Are there any arguments that must be processed? */ |
| 953 | |
| 954 | if (walk_state->arg_types) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 955 | |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 956 | /* Get arguments */ |
| 957 | |
Mikhail Kouzmich | 4d0b4af | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 958 | status = |
| 959 | acpi_ps_get_arguments(walk_state, aml_op_start, op); |
| 960 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 961 | status = |
Mikhail Kouzmich | 4d0b4af | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 962 | acpi_ps_complete_op(walk_state, &op, |
| 963 | status); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 964 | if (ACPI_FAILURE(status)) { |
Mikhail Kouzmich | 4d0b4af | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 965 | return_ACPI_STATUS(status); |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 966 | } |
| 967 | |
Mikhail Kouzmich | 4d0b4af | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 968 | continue; |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 969 | } |
| 970 | } |
| 971 | |
| 972 | /* Check for arguments that need to be processed */ |
| 973 | |
| 974 | if (walk_state->arg_count) { |
| 975 | /* |
| 976 | * There are arguments (complex ones), push Op and |
| 977 | * prepare for argument |
| 978 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 979 | status = acpi_ps_push_scope(parser_state, op, |
| 980 | walk_state->arg_types, |
| 981 | walk_state->arg_count); |
| 982 | if (ACPI_FAILURE(status)) { |
Mikhail Kouzmich | 4d0b4af | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 983 | status = |
| 984 | acpi_ps_complete_op(walk_state, &op, |
| 985 | status); |
| 986 | if (ACPI_FAILURE(status)) { |
| 987 | return_ACPI_STATUS(status); |
| 988 | } |
| 989 | |
| 990 | continue; |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 991 | } |
Mikhail Kouzmich | 4d0b4af | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 992 | |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 993 | op = NULL; |
| 994 | continue; |
| 995 | } |
| 996 | |
| 997 | /* |
| 998 | * All arguments have been processed -- Op is complete, |
| 999 | * prepare for next |
| 1000 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1001 | walk_state->op_info = |
| 1002 | acpi_ps_get_opcode_info(op->common.aml_opcode); |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 1003 | if (walk_state->op_info->flags & AML_NAMED) { |
| 1004 | if (acpi_gbl_depth) { |
| 1005 | acpi_gbl_depth--; |
| 1006 | } |
| 1007 | |
| 1008 | if (op->common.aml_opcode == AML_REGION_OP) { |
| 1009 | /* |
| 1010 | * Skip parsing of control method or opregion body, |
| 1011 | * because we don't have enough info in the first pass |
| 1012 | * to parse them correctly. |
| 1013 | * |
| 1014 | * Completed parsing an op_region declaration, we now |
| 1015 | * know the length. |
| 1016 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1017 | op->named.length = |
| 1018 | (u32) (parser_state->aml - op->named.data); |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 1019 | } |
| 1020 | } |
| 1021 | |
| 1022 | if (walk_state->op_info->flags & AML_CREATE) { |
| 1023 | /* |
| 1024 | * Backup to beginning of create_xXXfield declaration (1 for |
| 1025 | * Opcode) |
| 1026 | * |
| 1027 | * body_length is unknown until we parse the body |
| 1028 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1029 | op->named.length = |
| 1030 | (u32) (parser_state->aml - op->named.data); |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 1031 | } |
| 1032 | |
| 1033 | /* This op complete, notify the dispatcher */ |
| 1034 | |
| 1035 | if (walk_state->ascending_callback != NULL) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1036 | walk_state->op = op; |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 1037 | walk_state->opcode = op->common.aml_opcode; |
| 1038 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1039 | status = walk_state->ascending_callback(walk_state); |
| 1040 | status = |
| 1041 | acpi_ps_next_parse_state(walk_state, op, status); |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 1042 | if (status == AE_CTRL_PENDING) { |
| 1043 | status = AE_OK; |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 1044 | } |
| 1045 | } |
| 1046 | |
Mikhail Kouzmich | 4d0b4af | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 1047 | status = acpi_ps_complete_op(walk_state, &op, status); |
| 1048 | if (ACPI_FAILURE(status)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1049 | return_ACPI_STATUS(status); |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 1050 | } |
| 1051 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1052 | } /* while parser_state->Aml */ |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 1053 | |
Mikhail Kouzmich | 4d0b4af | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 1054 | status = acpi_ps_complete_final_op(walk_state, op, status); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1055 | return_ACPI_STATUS(status); |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 1056 | } |