Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: psobject - Support for parse objects |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
David E. Box | 82a8094 | 2015-02-05 15:20:45 +0800 | [diff] [blame] | 8 | * Copyright (C) 2000 - 2015, Intel Corp. |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [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 | |
| 44 | #include <acpi/acpi.h> |
| 45 | #include "accommon.h" |
| 46 | #include "acparser.h" |
| 47 | #include "amlcode.h" |
| 48 | |
| 49 | #define _COMPONENT ACPI_PARSER |
| 50 | ACPI_MODULE_NAME("psobject") |
| 51 | |
| 52 | /* Local prototypes */ |
| 53 | static acpi_status acpi_ps_get_aml_opcode(struct acpi_walk_state *walk_state); |
| 54 | |
| 55 | /******************************************************************************* |
| 56 | * |
| 57 | * FUNCTION: acpi_ps_get_aml_opcode |
| 58 | * |
| 59 | * PARAMETERS: walk_state - Current state |
| 60 | * |
| 61 | * RETURN: Status |
| 62 | * |
| 63 | * DESCRIPTION: Extract the next AML opcode from the input stream. |
| 64 | * |
| 65 | ******************************************************************************/ |
| 66 | |
| 67 | static acpi_status acpi_ps_get_aml_opcode(struct acpi_walk_state *walk_state) |
| 68 | { |
| 69 | |
| 70 | ACPI_FUNCTION_TRACE_PTR(ps_get_aml_opcode, walk_state); |
| 71 | |
| 72 | walk_state->aml_offset = |
| 73 | (u32)ACPI_PTR_DIFF(walk_state->parser_state.aml, |
| 74 | walk_state->parser_state.aml_start); |
| 75 | walk_state->opcode = acpi_ps_peek_opcode(&(walk_state->parser_state)); |
| 76 | |
| 77 | /* |
| 78 | * First cut to determine what we have found: |
| 79 | * 1) A valid AML opcode |
| 80 | * 2) A name string |
| 81 | * 3) An unknown/invalid opcode |
| 82 | */ |
| 83 | walk_state->op_info = acpi_ps_get_opcode_info(walk_state->opcode); |
| 84 | |
| 85 | switch (walk_state->op_info->class) { |
| 86 | case AML_CLASS_ASCII: |
| 87 | case AML_CLASS_PREFIX: |
| 88 | /* |
| 89 | * Starts with a valid prefix or ASCII char, this is a name |
| 90 | * string. Convert the bare name string to a namepath. |
| 91 | */ |
| 92 | walk_state->opcode = AML_INT_NAMEPATH_OP; |
| 93 | walk_state->arg_types = ARGP_NAMESTRING; |
| 94 | break; |
| 95 | |
| 96 | case AML_CLASS_UNKNOWN: |
| 97 | |
| 98 | /* The opcode is unrecognized. Complain and skip unknown opcodes */ |
| 99 | |
| 100 | if (walk_state->pass_number == 2) { |
| 101 | ACPI_ERROR((AE_INFO, |
| 102 | "Unknown opcode 0x%.2X at table offset 0x%.4X, ignoring", |
| 103 | walk_state->opcode, |
| 104 | (u32)(walk_state->aml_offset + |
| 105 | sizeof(struct acpi_table_header)))); |
| 106 | |
| 107 | ACPI_DUMP_BUFFER((walk_state->parser_state.aml - 16), |
| 108 | 48); |
| 109 | |
| 110 | #ifdef ACPI_ASL_COMPILER |
| 111 | /* |
| 112 | * This is executed for the disassembler only. Output goes |
| 113 | * to the disassembled ASL output file. |
| 114 | */ |
| 115 | acpi_os_printf |
| 116 | ("/*\nError: Unknown opcode 0x%.2X at table offset 0x%.4X, context:\n", |
| 117 | walk_state->opcode, |
| 118 | (u32)(walk_state->aml_offset + |
| 119 | sizeof(struct acpi_table_header))); |
| 120 | |
| 121 | /* Dump the context surrounding the invalid opcode */ |
| 122 | |
| 123 | acpi_ut_dump_buffer(((u8 *)walk_state->parser_state. |
| 124 | aml - 16), 48, DB_BYTE_DISPLAY, |
| 125 | (walk_state->aml_offset + |
| 126 | sizeof(struct acpi_table_header) - |
| 127 | 16)); |
| 128 | acpi_os_printf(" */\n"); |
| 129 | #endif |
| 130 | } |
| 131 | |
| 132 | /* Increment past one-byte or two-byte opcode */ |
| 133 | |
| 134 | walk_state->parser_state.aml++; |
| 135 | if (walk_state->opcode > 0xFF) { /* Can only happen if first byte is 0x5B */ |
| 136 | walk_state->parser_state.aml++; |
| 137 | } |
| 138 | |
| 139 | return_ACPI_STATUS(AE_CTRL_PARSE_CONTINUE); |
| 140 | |
| 141 | default: |
| 142 | |
| 143 | /* Found opcode info, this is a normal opcode */ |
| 144 | |
| 145 | walk_state->parser_state.aml += |
| 146 | acpi_ps_get_opcode_size(walk_state->opcode); |
| 147 | walk_state->arg_types = walk_state->op_info->parse_args; |
| 148 | break; |
| 149 | } |
| 150 | |
| 151 | return_ACPI_STATUS(AE_OK); |
| 152 | } |
| 153 | |
| 154 | /******************************************************************************* |
| 155 | * |
| 156 | * FUNCTION: acpi_ps_build_named_op |
| 157 | * |
| 158 | * PARAMETERS: walk_state - Current state |
| 159 | * aml_op_start - Begin of named Op in AML |
| 160 | * unnamed_op - Early Op (not a named Op) |
| 161 | * op - Returned Op |
| 162 | * |
| 163 | * RETURN: Status |
| 164 | * |
| 165 | * DESCRIPTION: Parse a named Op |
| 166 | * |
| 167 | ******************************************************************************/ |
| 168 | |
| 169 | acpi_status |
| 170 | acpi_ps_build_named_op(struct acpi_walk_state *walk_state, |
| 171 | u8 *aml_op_start, |
| 172 | union acpi_parse_object *unnamed_op, |
| 173 | union acpi_parse_object **op) |
| 174 | { |
| 175 | acpi_status status = AE_OK; |
| 176 | union acpi_parse_object *arg = NULL; |
| 177 | |
| 178 | ACPI_FUNCTION_TRACE_PTR(ps_build_named_op, walk_state); |
| 179 | |
| 180 | unnamed_op->common.value.arg = NULL; |
| 181 | unnamed_op->common.arg_list_length = 0; |
| 182 | unnamed_op->common.aml_opcode = walk_state->opcode; |
| 183 | |
| 184 | /* |
| 185 | * Get and append arguments until we find the node that contains |
| 186 | * the name (the type ARGP_NAME). |
| 187 | */ |
| 188 | while (GET_CURRENT_ARG_TYPE(walk_state->arg_types) && |
| 189 | (GET_CURRENT_ARG_TYPE(walk_state->arg_types) != ARGP_NAME)) { |
| 190 | status = |
| 191 | acpi_ps_get_next_arg(walk_state, |
| 192 | &(walk_state->parser_state), |
| 193 | GET_CURRENT_ARG_TYPE(walk_state-> |
| 194 | arg_types), &arg); |
| 195 | if (ACPI_FAILURE(status)) { |
| 196 | return_ACPI_STATUS(status); |
| 197 | } |
| 198 | |
| 199 | acpi_ps_append_arg(unnamed_op, arg); |
| 200 | INCREMENT_ARG_LIST(walk_state->arg_types); |
| 201 | } |
| 202 | |
| 203 | /* |
| 204 | * Make sure that we found a NAME and didn't run out of arguments |
| 205 | */ |
| 206 | if (!GET_CURRENT_ARG_TYPE(walk_state->arg_types)) { |
| 207 | return_ACPI_STATUS(AE_AML_NO_OPERAND); |
| 208 | } |
| 209 | |
| 210 | /* We know that this arg is a name, move to next arg */ |
| 211 | |
| 212 | INCREMENT_ARG_LIST(walk_state->arg_types); |
| 213 | |
| 214 | /* |
| 215 | * Find the object. This will either insert the object into |
| 216 | * the namespace or simply look it up |
| 217 | */ |
| 218 | walk_state->op = NULL; |
| 219 | |
| 220 | status = walk_state->descending_callback(walk_state, op); |
| 221 | if (ACPI_FAILURE(status)) { |
Bob Moore | 22b5afc | 2014-03-24 14:49:00 +0800 | [diff] [blame] | 222 | if (status != AE_CTRL_TERMINATE) { |
| 223 | ACPI_EXCEPTION((AE_INFO, status, |
| 224 | "During name lookup/catalog")); |
| 225 | } |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 226 | return_ACPI_STATUS(status); |
| 227 | } |
| 228 | |
| 229 | if (!*op) { |
| 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) { |
Bob Moore | 22b5afc | 2014-03-24 14:49:00 +0800 | [diff] [blame] | 236 | status = AE_CTRL_PARSE_PENDING; |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 237 | } |
| 238 | return_ACPI_STATUS(status); |
| 239 | } |
| 240 | |
| 241 | acpi_ps_append_arg(*op, unnamed_op->common.value.arg); |
| 242 | |
| 243 | if ((*op)->common.aml_opcode == AML_REGION_OP || |
| 244 | (*op)->common.aml_opcode == AML_DATA_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 | 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 | union acpi_parse_object *parent_scope; |
| 284 | u8 argument_count; |
| 285 | const struct acpi_opcode_info *op_info; |
| 286 | |
| 287 | ACPI_FUNCTION_TRACE_PTR(ps_create_op, walk_state); |
| 288 | |
| 289 | status = acpi_ps_get_aml_opcode(walk_state); |
| 290 | if (status == AE_CTRL_PARSE_CONTINUE) { |
| 291 | return_ACPI_STATUS(AE_CTRL_PARSE_CONTINUE); |
| 292 | } |
| 293 | |
| 294 | /* Create Op structure and append to parent's argument list */ |
| 295 | |
| 296 | walk_state->op_info = acpi_ps_get_opcode_info(walk_state->opcode); |
| 297 | op = acpi_ps_alloc_op(walk_state->opcode); |
| 298 | if (!op) { |
| 299 | return_ACPI_STATUS(AE_NO_MEMORY); |
| 300 | } |
| 301 | |
| 302 | if (walk_state->op_info->flags & AML_NAMED) { |
| 303 | status = |
| 304 | acpi_ps_build_named_op(walk_state, aml_op_start, op, |
| 305 | &named_op); |
| 306 | acpi_ps_free_op(op); |
| 307 | if (ACPI_FAILURE(status)) { |
| 308 | return_ACPI_STATUS(status); |
| 309 | } |
| 310 | |
| 311 | *new_op = named_op; |
| 312 | return_ACPI_STATUS(AE_OK); |
| 313 | } |
| 314 | |
| 315 | /* Not a named opcode, just allocate Op and append to parent */ |
| 316 | |
| 317 | if (walk_state->op_info->flags & AML_CREATE) { |
| 318 | /* |
| 319 | * Backup to beginning of create_XXXfield declaration |
| 320 | * body_length is unknown until we parse the body |
| 321 | */ |
| 322 | op->named.data = aml_op_start; |
| 323 | op->named.length = 0; |
| 324 | } |
| 325 | |
| 326 | if (walk_state->opcode == AML_BANK_FIELD_OP) { |
| 327 | /* |
| 328 | * Backup to beginning of bank_field declaration |
| 329 | * body_length is unknown until we parse the body |
| 330 | */ |
| 331 | op->named.data = aml_op_start; |
| 332 | op->named.length = 0; |
| 333 | } |
| 334 | |
| 335 | parent_scope = acpi_ps_get_parent_scope(&(walk_state->parser_state)); |
| 336 | acpi_ps_append_arg(parent_scope, op); |
| 337 | |
| 338 | if (parent_scope) { |
| 339 | op_info = |
| 340 | acpi_ps_get_opcode_info(parent_scope->common.aml_opcode); |
| 341 | if (op_info->flags & AML_HAS_TARGET) { |
| 342 | argument_count = |
| 343 | acpi_ps_get_argument_count(op_info->type); |
| 344 | if (parent_scope->common.arg_list_length > |
| 345 | argument_count) { |
| 346 | op->common.flags |= ACPI_PARSEOP_TARGET; |
| 347 | } |
| 348 | } else if (parent_scope->common.aml_opcode == AML_INCREMENT_OP) { |
| 349 | op->common.flags |= ACPI_PARSEOP_TARGET; |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | if (walk_state->descending_callback != NULL) { |
| 354 | /* |
| 355 | * Find the object. This will either insert the object into |
| 356 | * the namespace or simply look it up |
| 357 | */ |
| 358 | walk_state->op = *new_op = op; |
| 359 | |
| 360 | status = walk_state->descending_callback(walk_state, &op); |
| 361 | status = acpi_ps_next_parse_state(walk_state, op, status); |
| 362 | if (status == AE_CTRL_PENDING) { |
| 363 | status = AE_CTRL_PARSE_PENDING; |
| 364 | } |
| 365 | } |
| 366 | |
| 367 | return_ACPI_STATUS(status); |
| 368 | } |
| 369 | |
| 370 | /******************************************************************************* |
| 371 | * |
| 372 | * FUNCTION: acpi_ps_complete_op |
| 373 | * |
| 374 | * PARAMETERS: walk_state - Current state |
| 375 | * op - Returned Op |
| 376 | * status - Parse status before complete Op |
| 377 | * |
| 378 | * RETURN: Status |
| 379 | * |
| 380 | * DESCRIPTION: Complete Op |
| 381 | * |
| 382 | ******************************************************************************/ |
| 383 | |
| 384 | acpi_status |
| 385 | acpi_ps_complete_op(struct acpi_walk_state *walk_state, |
| 386 | union acpi_parse_object **op, acpi_status status) |
| 387 | { |
| 388 | acpi_status status2; |
| 389 | |
| 390 | ACPI_FUNCTION_TRACE_PTR(ps_complete_op, walk_state); |
| 391 | |
| 392 | /* |
| 393 | * Finished one argument of the containing scope |
| 394 | */ |
| 395 | walk_state->parser_state.scope->parse_scope.arg_count--; |
| 396 | |
| 397 | /* Close this Op (will result in parse subtree deletion) */ |
| 398 | |
| 399 | status2 = acpi_ps_complete_this_op(walk_state, *op); |
| 400 | if (ACPI_FAILURE(status2)) { |
| 401 | return_ACPI_STATUS(status2); |
| 402 | } |
| 403 | |
| 404 | *op = NULL; |
| 405 | |
| 406 | switch (status) { |
| 407 | case AE_OK: |
Chao Guan | 1d1ea1b7 | 2013-06-08 00:58:14 +0000 | [diff] [blame] | 408 | |
Bob Moore | 42f8fb7 | 2013-01-11 13:08:51 +0100 | [diff] [blame] | 409 | break; |
| 410 | |
| 411 | case AE_CTRL_TRANSFER: |
| 412 | |
| 413 | /* We are about to transfer to a called method */ |
| 414 | |
| 415 | walk_state->prev_op = NULL; |
| 416 | walk_state->prev_arg_types = walk_state->arg_types; |
| 417 | return_ACPI_STATUS(status); |
| 418 | |
| 419 | case AE_CTRL_END: |
| 420 | |
| 421 | acpi_ps_pop_scope(&(walk_state->parser_state), op, |
| 422 | &walk_state->arg_types, |
| 423 | &walk_state->arg_count); |
| 424 | |
| 425 | if (*op) { |
| 426 | walk_state->op = *op; |
| 427 | walk_state->op_info = |
| 428 | acpi_ps_get_opcode_info((*op)->common.aml_opcode); |
| 429 | walk_state->opcode = (*op)->common.aml_opcode; |
| 430 | |
| 431 | status = walk_state->ascending_callback(walk_state); |
| 432 | status = |
| 433 | acpi_ps_next_parse_state(walk_state, *op, status); |
| 434 | |
| 435 | status2 = acpi_ps_complete_this_op(walk_state, *op); |
| 436 | if (ACPI_FAILURE(status2)) { |
| 437 | return_ACPI_STATUS(status2); |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | status = AE_OK; |
| 442 | break; |
| 443 | |
| 444 | case AE_CTRL_BREAK: |
| 445 | case AE_CTRL_CONTINUE: |
| 446 | |
| 447 | /* Pop off scopes until we find the While */ |
| 448 | |
| 449 | while (!(*op) || ((*op)->common.aml_opcode != AML_WHILE_OP)) { |
| 450 | acpi_ps_pop_scope(&(walk_state->parser_state), op, |
| 451 | &walk_state->arg_types, |
| 452 | &walk_state->arg_count); |
| 453 | } |
| 454 | |
| 455 | /* Close this iteration of the While loop */ |
| 456 | |
| 457 | walk_state->op = *op; |
| 458 | walk_state->op_info = |
| 459 | acpi_ps_get_opcode_info((*op)->common.aml_opcode); |
| 460 | walk_state->opcode = (*op)->common.aml_opcode; |
| 461 | |
| 462 | status = walk_state->ascending_callback(walk_state); |
| 463 | status = acpi_ps_next_parse_state(walk_state, *op, status); |
| 464 | |
| 465 | status2 = acpi_ps_complete_this_op(walk_state, *op); |
| 466 | if (ACPI_FAILURE(status2)) { |
| 467 | return_ACPI_STATUS(status2); |
| 468 | } |
| 469 | |
| 470 | status = AE_OK; |
| 471 | break; |
| 472 | |
| 473 | case AE_CTRL_TERMINATE: |
| 474 | |
| 475 | /* Clean up */ |
| 476 | do { |
| 477 | if (*op) { |
| 478 | status2 = |
| 479 | acpi_ps_complete_this_op(walk_state, *op); |
| 480 | if (ACPI_FAILURE(status2)) { |
| 481 | return_ACPI_STATUS(status2); |
| 482 | } |
| 483 | |
| 484 | acpi_ut_delete_generic_state |
| 485 | (acpi_ut_pop_generic_state |
| 486 | (&walk_state->control_state)); |
| 487 | } |
| 488 | |
| 489 | acpi_ps_pop_scope(&(walk_state->parser_state), op, |
| 490 | &walk_state->arg_types, |
| 491 | &walk_state->arg_count); |
| 492 | |
| 493 | } while (*op); |
| 494 | |
| 495 | return_ACPI_STATUS(AE_OK); |
| 496 | |
| 497 | default: /* All other non-AE_OK status */ |
| 498 | |
| 499 | do { |
| 500 | if (*op) { |
| 501 | status2 = |
| 502 | acpi_ps_complete_this_op(walk_state, *op); |
| 503 | if (ACPI_FAILURE(status2)) { |
| 504 | return_ACPI_STATUS(status2); |
| 505 | } |
| 506 | } |
| 507 | |
| 508 | acpi_ps_pop_scope(&(walk_state->parser_state), op, |
| 509 | &walk_state->arg_types, |
| 510 | &walk_state->arg_count); |
| 511 | |
| 512 | } while (*op); |
| 513 | |
| 514 | #if 0 |
| 515 | /* |
| 516 | * TBD: Cleanup parse ops on error |
| 517 | */ |
| 518 | if (*op == NULL) { |
| 519 | acpi_ps_pop_scope(parser_state, op, |
| 520 | &walk_state->arg_types, |
| 521 | &walk_state->arg_count); |
| 522 | } |
| 523 | #endif |
| 524 | walk_state->prev_op = NULL; |
| 525 | walk_state->prev_arg_types = walk_state->arg_types; |
| 526 | return_ACPI_STATUS(status); |
| 527 | } |
| 528 | |
| 529 | /* This scope complete? */ |
| 530 | |
| 531 | if (acpi_ps_has_completed_scope(&(walk_state->parser_state))) { |
| 532 | acpi_ps_pop_scope(&(walk_state->parser_state), op, |
| 533 | &walk_state->arg_types, |
| 534 | &walk_state->arg_count); |
| 535 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "Popped scope, Op=%p\n", *op)); |
| 536 | } else { |
| 537 | *op = NULL; |
| 538 | } |
| 539 | |
| 540 | return_ACPI_STATUS(AE_OK); |
| 541 | } |
| 542 | |
| 543 | /******************************************************************************* |
| 544 | * |
| 545 | * FUNCTION: acpi_ps_complete_final_op |
| 546 | * |
| 547 | * PARAMETERS: walk_state - Current state |
| 548 | * op - Current Op |
| 549 | * status - Current parse status before complete last |
| 550 | * Op |
| 551 | * |
| 552 | * RETURN: Status |
| 553 | * |
| 554 | * DESCRIPTION: Complete last Op. |
| 555 | * |
| 556 | ******************************************************************************/ |
| 557 | |
| 558 | acpi_status |
| 559 | acpi_ps_complete_final_op(struct acpi_walk_state *walk_state, |
| 560 | union acpi_parse_object *op, acpi_status status) |
| 561 | { |
| 562 | acpi_status status2; |
| 563 | |
| 564 | ACPI_FUNCTION_TRACE_PTR(ps_complete_final_op, walk_state); |
| 565 | |
| 566 | /* |
| 567 | * Complete the last Op (if not completed), and clear the scope stack. |
| 568 | * It is easily possible to end an AML "package" with an unbounded number |
| 569 | * of open scopes (such as when several ASL blocks are closed with |
| 570 | * sequential closing braces). We want to terminate each one cleanly. |
| 571 | */ |
| 572 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "AML package complete at Op %p\n", |
| 573 | op)); |
| 574 | do { |
| 575 | if (op) { |
| 576 | if (walk_state->ascending_callback != NULL) { |
| 577 | walk_state->op = op; |
| 578 | walk_state->op_info = |
| 579 | acpi_ps_get_opcode_info(op->common. |
| 580 | aml_opcode); |
| 581 | walk_state->opcode = op->common.aml_opcode; |
| 582 | |
| 583 | status = |
| 584 | walk_state->ascending_callback(walk_state); |
| 585 | status = |
| 586 | acpi_ps_next_parse_state(walk_state, op, |
| 587 | status); |
| 588 | if (status == AE_CTRL_PENDING) { |
| 589 | status = |
| 590 | acpi_ps_complete_op(walk_state, &op, |
| 591 | AE_OK); |
| 592 | if (ACPI_FAILURE(status)) { |
| 593 | return_ACPI_STATUS(status); |
| 594 | } |
| 595 | } |
| 596 | |
| 597 | if (status == AE_CTRL_TERMINATE) { |
| 598 | status = AE_OK; |
| 599 | |
| 600 | /* Clean up */ |
| 601 | do { |
| 602 | if (op) { |
| 603 | status2 = |
| 604 | acpi_ps_complete_this_op |
| 605 | (walk_state, op); |
| 606 | if (ACPI_FAILURE |
| 607 | (status2)) { |
| 608 | return_ACPI_STATUS |
| 609 | (status2); |
| 610 | } |
| 611 | } |
| 612 | |
| 613 | acpi_ps_pop_scope(& |
| 614 | (walk_state-> |
| 615 | parser_state), |
| 616 | &op, |
| 617 | &walk_state-> |
| 618 | arg_types, |
| 619 | &walk_state-> |
| 620 | arg_count); |
| 621 | |
| 622 | } while (op); |
| 623 | |
| 624 | return_ACPI_STATUS(status); |
| 625 | } |
| 626 | |
| 627 | else if (ACPI_FAILURE(status)) { |
| 628 | |
| 629 | /* First error is most important */ |
| 630 | |
| 631 | (void) |
| 632 | acpi_ps_complete_this_op(walk_state, |
| 633 | op); |
| 634 | return_ACPI_STATUS(status); |
| 635 | } |
| 636 | } |
| 637 | |
| 638 | status2 = acpi_ps_complete_this_op(walk_state, op); |
| 639 | if (ACPI_FAILURE(status2)) { |
| 640 | return_ACPI_STATUS(status2); |
| 641 | } |
| 642 | } |
| 643 | |
| 644 | acpi_ps_pop_scope(&(walk_state->parser_state), &op, |
| 645 | &walk_state->arg_types, |
| 646 | &walk_state->arg_count); |
| 647 | |
| 648 | } while (op); |
| 649 | |
| 650 | return_ACPI_STATUS(status); |
| 651 | } |