1 /******************************************************************************
3 * Module Name: dswload2 - Dispatcher second pass namespace load callbacks
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2014, Intel Corp.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
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.
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.
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.
44 #include <acpi/acpi.h>
53 #define _COMPONENT ACPI_DISPATCHER
54 ACPI_MODULE_NAME("dswload2")
56 /*******************************************************************************
58 * FUNCTION: acpi_ds_load2_begin_op
60 * PARAMETERS: walk_state - Current state of the parse tree walk
61 * out_op - Wher to return op if a new one is created
65 * DESCRIPTION: Descending callback used during the loading of ACPI tables.
67 ******************************************************************************/
69 acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state,
70 union acpi_parse_object **out_op)
72 union acpi_parse_object *op;
73 struct acpi_namespace_node *node;
75 acpi_object_type object_type;
79 ACPI_FUNCTION_TRACE(ds_load2_begin_op);
82 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
86 if ((walk_state->control_state) &&
87 (walk_state->control_state->common.state ==
88 ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
90 /* We are executing a while loop outside of a method */
92 status = acpi_ds_exec_begin_op(walk_state, out_op);
93 return_ACPI_STATUS(status);
96 /* We only care about Namespace opcodes here */
98 if ((!(walk_state->op_info->flags & AML_NSOPCODE) &&
99 (walk_state->opcode != AML_INT_NAMEPATH_OP)) ||
100 (!(walk_state->op_info->flags & AML_NAMED))) {
101 return_ACPI_STATUS(AE_OK);
104 /* Get the name we are going to enter or lookup in the namespace */
106 if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
108 /* For Namepath op, get the path string */
110 buffer_ptr = op->common.value.string;
113 /* No name, just exit */
115 return_ACPI_STATUS(AE_OK);
118 /* Get name from the op */
120 buffer_ptr = ACPI_CAST_PTR(char, &op->named.name);
123 /* Get the namestring from the raw AML */
126 acpi_ps_get_next_namestring(&walk_state->parser_state);
129 /* Map the opcode into an internal object type */
131 object_type = walk_state->op_info->object_type;
133 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
134 "State=%p Op=%p Type=%X\n", walk_state, op,
137 switch (walk_state->opcode) {
139 case AML_BANK_FIELD_OP:
140 case AML_INDEX_FIELD_OP:
146 case AML_INT_NAMEPATH_OP:
148 * The name_path is an object reference to an existing object.
149 * Don't enter the name into the namespace, but look it up
153 acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
154 object_type, ACPI_IMODE_EXECUTE,
155 ACPI_NS_SEARCH_PARENT, walk_state, &(node));
160 /* Special case for Scope(\) -> refers to the Root node */
162 if (op && (op->named.node == acpi_gbl_root_node)) {
163 node = op->named.node;
166 acpi_ds_scope_stack_push(node, object_type,
168 if (ACPI_FAILURE(status)) {
169 return_ACPI_STATUS(status);
173 * The Path is an object reference to an existing object.
174 * Don't enter the name into the namespace, but look it up
178 acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
179 object_type, ACPI_IMODE_EXECUTE,
180 ACPI_NS_SEARCH_PARENT, walk_state,
182 if (ACPI_FAILURE(status)) {
183 #ifdef ACPI_ASL_COMPILER
184 if (status == AE_NOT_FOUND) {
187 ACPI_ERROR_NAMESPACE(buffer_ptr,
191 ACPI_ERROR_NAMESPACE(buffer_ptr, status);
193 return_ACPI_STATUS(status);
198 * We must check to make sure that the target is
199 * one of the opcodes that actually opens a scope
201 switch (node->type) {
203 case ACPI_TYPE_LOCAL_SCOPE: /* Scope */
204 case ACPI_TYPE_DEVICE:
205 case ACPI_TYPE_POWER:
206 case ACPI_TYPE_PROCESSOR:
207 case ACPI_TYPE_THERMAL:
209 /* These are acceptable types */
212 case ACPI_TYPE_INTEGER:
213 case ACPI_TYPE_STRING:
214 case ACPI_TYPE_BUFFER:
217 * These types we will allow, but we will change the type.
218 * This enables some existing code of the form:
221 * Scope (DEB) { ... }
223 ACPI_WARNING((AE_INFO,
224 "Type override - [%4.4s] had invalid type (%s) "
225 "for Scope operator, changed to type ANY",
226 acpi_ut_get_node_name(node),
227 acpi_ut_get_type_name(node->type)));
229 node->type = ACPI_TYPE_ANY;
230 walk_state->scope_info->common.value = ACPI_TYPE_ANY;
233 case ACPI_TYPE_METHOD:
236 * Allow scope change to root during execution of module-level
237 * code. Root is typed METHOD during this time.
239 if ((node == acpi_gbl_root_node) &&
241 parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
245 /*lint -fallthrough */
249 /* All other types are an error */
252 "Invalid type (%s) for target of "
253 "Scope operator [%4.4s] (Cannot override)",
254 acpi_ut_get_type_name(node->type),
255 acpi_ut_get_node_name(node)));
257 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
263 /* All other opcodes */
265 if (op && op->common.node) {
267 /* This op/node was previously entered into the namespace */
269 node = op->common.node;
271 if (acpi_ns_opens_scope(object_type)) {
273 acpi_ds_scope_stack_push(node, object_type,
275 if (ACPI_FAILURE(status)) {
276 return_ACPI_STATUS(status);
280 return_ACPI_STATUS(AE_OK);
284 * Enter the named type into the internal namespace. We enter the name
285 * as we go downward in the parse tree. Any necessary subobjects that
286 * involve arguments to the opcode must be created as we go back up the
289 * Note: Name may already exist if we are executing a deferred opcode.
291 if (walk_state->deferred_node) {
293 /* This name is already in the namespace, get the node */
295 node = walk_state->deferred_node;
300 flags = ACPI_NS_NO_UPSEARCH;
301 if (walk_state->pass_number == ACPI_IMODE_EXECUTE) {
303 /* Execution mode, node cannot already exist, node is temporary */
305 flags |= ACPI_NS_ERROR_IF_FOUND;
309 parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
310 flags |= ACPI_NS_TEMPORARY;
314 /* Add new entry or lookup existing entry */
317 acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
318 object_type, ACPI_IMODE_LOAD_PASS2, flags,
321 if (ACPI_SUCCESS(status) && (flags & ACPI_NS_TEMPORARY)) {
322 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
323 "***New Node [%4.4s] %p is temporary\n",
324 acpi_ut_get_node_name(node), node));
329 if (ACPI_FAILURE(status)) {
330 ACPI_ERROR_NAMESPACE(buffer_ptr, status);
331 return_ACPI_STATUS(status);
336 /* Create a new op */
338 op = acpi_ps_alloc_op(walk_state->opcode);
340 return_ACPI_STATUS(AE_NO_MEMORY);
343 /* Initialize the new op */
346 op->named.name = node->name.integer;
352 * Put the Node in the "op" object that the parser uses, so we
353 * can get it again quickly when this scope is closed
355 op->common.node = node;
356 return_ACPI_STATUS(status);
359 /*******************************************************************************
361 * FUNCTION: acpi_ds_load2_end_op
363 * PARAMETERS: walk_state - Current state of the parse tree walk
367 * DESCRIPTION: Ascending callback used during the loading of the namespace,
368 * both control methods and everything else.
370 ******************************************************************************/
372 acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state)
374 union acpi_parse_object *op;
375 acpi_status status = AE_OK;
376 acpi_object_type object_type;
377 struct acpi_namespace_node *node;
378 union acpi_parse_object *arg;
379 struct acpi_namespace_node *new_node;
380 #ifndef ACPI_NO_METHOD_EXECUTION
385 ACPI_FUNCTION_TRACE(ds_load2_end_op);
388 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
389 walk_state->op_info->name, op, walk_state));
391 /* Check if opcode had an associated namespace object */
393 if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
394 return_ACPI_STATUS(AE_OK);
397 if (op->common.aml_opcode == AML_SCOPE_OP) {
398 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
399 "Ending scope Op=%p State=%p\n", op,
403 object_type = walk_state->op_info->object_type;
406 * Get the Node/name from the earlier lookup
407 * (It was saved in the *op structure)
409 node = op->common.node;
412 * Put the Node on the object stack (Contains the ACPI Name of
415 walk_state->operands[0] = (void *)node;
416 walk_state->num_operands = 1;
418 /* Pop the scope stack */
420 if (acpi_ns_opens_scope(object_type) &&
421 (op->common.aml_opcode != AML_INT_METHODCALL_OP)) {
422 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
423 "(%s) Popping scope for Op %p\n",
424 acpi_ut_get_type_name(object_type), op));
426 status = acpi_ds_scope_stack_pop(walk_state);
427 if (ACPI_FAILURE(status)) {
433 * Named operations are as follows:
438 * AML_CREATEBYTEFIELD
439 * AML_CREATEDWORDFIELD
441 * AML_CREATEQWORDFIELD
442 * AML_CREATEWORDFIELD
460 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
461 "Create-Load [%s] State=%p Op=%p NamedObj=%p\n",
462 acpi_ps_get_opcode_name(op->common.aml_opcode),
463 walk_state, op, node));
465 /* Decode the opcode */
467 arg = op->common.value.arg;
469 switch (walk_state->op_info->type) {
470 #ifndef ACPI_NO_METHOD_EXECUTION
472 case AML_TYPE_CREATE_FIELD:
474 * Create the field object, but the field buffer and index must
475 * be evaluated later during the execution phase
477 status = acpi_ds_create_buffer_field(op, walk_state);
480 case AML_TYPE_NAMED_FIELD:
482 * If we are executing a method, initialize the field
484 if (walk_state->method_node) {
485 status = acpi_ds_init_field_objects(op, walk_state);
488 switch (op->common.aml_opcode) {
489 case AML_INDEX_FIELD_OP:
492 acpi_ds_create_index_field(op,
494 common.node, walk_state);
497 case AML_BANK_FIELD_OP:
500 acpi_ds_create_bank_field(op, arg->common.node,
507 acpi_ds_create_field(op, arg->common.node,
513 /* All NAMED_FIELD opcodes must be handled above */
518 case AML_TYPE_NAMED_SIMPLE:
520 status = acpi_ds_create_operands(walk_state, arg);
521 if (ACPI_FAILURE(status)) {
525 switch (op->common.aml_opcode) {
526 case AML_PROCESSOR_OP:
528 status = acpi_ex_create_processor(walk_state);
531 case AML_POWER_RES_OP:
533 status = acpi_ex_create_power_resource(walk_state);
538 status = acpi_ex_create_mutex(walk_state);
543 status = acpi_ex_create_event(walk_state);
548 status = acpi_ex_create_alias(walk_state);
559 /* Delete operands */
561 for (i = 1; i < walk_state->num_operands; i++) {
562 acpi_ut_remove_reference(walk_state->operands[i]);
563 walk_state->operands[i] = NULL;
567 #endif /* ACPI_NO_METHOD_EXECUTION */
569 case AML_TYPE_NAMED_COMPLEX:
571 switch (op->common.aml_opcode) {
572 #ifndef ACPI_NO_METHOD_EXECUTION
574 case AML_DATA_REGION_OP:
576 if (op->common.aml_opcode == AML_REGION_OP) {
577 region_space = (acpi_adr_space_type)
578 ((op->common.value.arg)->common.value.
581 region_space = ACPI_ADR_SPACE_DATA_TABLE;
585 * The op_region is not fully parsed at this time. The only valid
586 * argument is the space_id. (We must save the address of the
587 * AML of the address and length operands)
589 * If we have a valid region, initialize it. The namespace is
590 * unlocked at this point.
592 * Need to unlock interpreter if it is locked (if we are running
593 * a control method), in order to allow _REG methods to be run
594 * during acpi_ev_initialize_region.
596 if (walk_state->method_node) {
598 * Executing a method: initialize the region and unlock
602 acpi_ex_create_region(op->named.data,
606 if (ACPI_FAILURE(status)) {
607 return_ACPI_STATUS(status);
610 acpi_ex_exit_interpreter();
614 acpi_ev_initialize_region
615 (acpi_ns_get_attached_object(node), FALSE);
616 if (walk_state->method_node) {
617 acpi_ex_enter_interpreter();
620 if (ACPI_FAILURE(status)) {
622 * If AE_NOT_EXIST is returned, it is not fatal
623 * because many regions get created before a handler
624 * is installed for said region.
626 if (AE_NOT_EXIST == status) {
634 status = acpi_ds_create_node(walk_state, node, op);
639 * method_op pkg_length name_string method_flags term_list
641 * Note: We must create the method node/object pair as soon as we
642 * see the method declaration. This allows later pass1 parsing
643 * of invocations of the method (need to know the number of
646 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
647 "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
648 walk_state, op, op->named.node));
650 if (!acpi_ns_get_attached_object(op->named.node)) {
651 walk_state->operands[0] =
652 ACPI_CAST_PTR(void, op->named.node);
653 walk_state->num_operands = 1;
656 acpi_ds_create_operands(walk_state,
659 if (ACPI_SUCCESS(status)) {
661 acpi_ex_create_method(op->named.
667 walk_state->operands[0] = NULL;
668 walk_state->num_operands = 0;
670 if (ACPI_FAILURE(status)) {
671 return_ACPI_STATUS(status);
676 #endif /* ACPI_NO_METHOD_EXECUTION */
680 /* All NAMED_COMPLEX opcodes must be handled above */
685 case AML_CLASS_INTERNAL:
687 /* case AML_INT_NAMEPATH_OP: */
690 case AML_CLASS_METHOD_CALL:
692 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
693 "RESOLVING-MethodCall: State=%p Op=%p NamedObj=%p\n",
694 walk_state, op, node));
697 * Lookup the method name and save the Node
700 acpi_ns_lookup(walk_state->scope_info,
701 arg->common.value.string, ACPI_TYPE_ANY,
702 ACPI_IMODE_LOAD_PASS2,
703 ACPI_NS_SEARCH_PARENT |
704 ACPI_NS_DONT_OPEN_SCOPE, walk_state,
706 if (ACPI_SUCCESS(status)) {
708 * Make sure that what we found is indeed a method
709 * We didn't search for a method on purpose, to see if the name
712 if (new_node->type != ACPI_TYPE_METHOD) {
713 status = AE_AML_OPERAND_TYPE;
716 /* We could put the returned object (Node) on the object stack for
717 * later, but for now, we will put it in the "op" object that the
718 * parser uses, so we can get it again at the end of this scope
720 op->common.node = new_node;
722 ACPI_ERROR_NAMESPACE(arg->common.value.string, status);
733 /* Remove the Node pushed at the very beginning */
735 walk_state->operands[0] = NULL;
736 walk_state->num_operands = 0;
737 return_ACPI_STATUS(status);