1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2 /******************************************************************************
4 * Module Name: dswload2 - Dispatcher second pass namespace load callbacks
6 * Copyright (C) 2000 - 2018, Intel Corp.
8 *****************************************************************************/
10 #include <acpi/acpi.h>
19 #define _COMPONENT ACPI_DISPATCHER
20 ACPI_MODULE_NAME("dswload2")
22 /*******************************************************************************
24 * FUNCTION: acpi_ds_load2_begin_op
26 * PARAMETERS: walk_state - Current state of the parse tree walk
27 * out_op - Wher to return op if a new one is created
31 * DESCRIPTION: Descending callback used during the loading of ACPI tables.
33 ******************************************************************************/
35 acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state,
36 union acpi_parse_object **out_op)
38 union acpi_parse_object *op;
39 struct acpi_namespace_node *node;
41 acpi_object_type object_type;
45 ACPI_FUNCTION_TRACE(ds_load2_begin_op);
48 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
52 if ((walk_state->control_state) &&
53 (walk_state->control_state->common.state ==
54 ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
56 /* We are executing a while loop outside of a method */
58 status = acpi_ds_exec_begin_op(walk_state, out_op);
59 return_ACPI_STATUS(status);
62 /* We only care about Namespace opcodes here */
64 if ((!(walk_state->op_info->flags & AML_NSOPCODE) &&
65 (walk_state->opcode != AML_INT_NAMEPATH_OP)) ||
66 (!(walk_state->op_info->flags & AML_NAMED))) {
67 return_ACPI_STATUS(AE_OK);
70 /* Get the name we are going to enter or lookup in the namespace */
72 if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
74 /* For Namepath op, get the path string */
76 buffer_ptr = op->common.value.string;
79 /* No name, just exit */
81 return_ACPI_STATUS(AE_OK);
84 /* Get name from the op */
86 buffer_ptr = ACPI_CAST_PTR(char, &op->named.name);
89 /* Get the namestring from the raw AML */
92 acpi_ps_get_next_namestring(&walk_state->parser_state);
95 /* Map the opcode into an internal object type */
97 object_type = walk_state->op_info->object_type;
99 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
100 "State=%p Op=%p Type=%X\n", walk_state, op,
103 switch (walk_state->opcode) {
105 case AML_BANK_FIELD_OP:
106 case AML_INDEX_FIELD_OP:
112 case AML_INT_NAMEPATH_OP:
114 * The name_path is an object reference to an existing object.
115 * Don't enter the name into the namespace, but look it up
119 acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
120 object_type, ACPI_IMODE_EXECUTE,
121 ACPI_NS_SEARCH_PARENT, walk_state, &(node));
126 /* Special case for Scope(\) -> refers to the Root node */
128 if (op && (op->named.node == acpi_gbl_root_node)) {
129 node = op->named.node;
132 acpi_ds_scope_stack_push(node, object_type,
134 if (ACPI_FAILURE(status)) {
135 return_ACPI_STATUS(status);
139 * The Path is an object reference to an existing object.
140 * Don't enter the name into the namespace, but look it up
144 acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
145 object_type, ACPI_IMODE_EXECUTE,
146 ACPI_NS_SEARCH_PARENT, walk_state,
148 if (ACPI_FAILURE(status)) {
149 #ifdef ACPI_ASL_COMPILER
150 if (status == AE_NOT_FOUND) {
153 ACPI_ERROR_NAMESPACE(walk_state->
159 ACPI_ERROR_NAMESPACE(walk_state->scope_info,
162 return_ACPI_STATUS(status);
167 * We must check to make sure that the target is
168 * one of the opcodes that actually opens a scope
170 switch (node->type) {
172 case ACPI_TYPE_LOCAL_SCOPE: /* Scope */
173 case ACPI_TYPE_DEVICE:
174 case ACPI_TYPE_POWER:
175 case ACPI_TYPE_PROCESSOR:
176 case ACPI_TYPE_THERMAL:
178 /* These are acceptable types */
181 case ACPI_TYPE_INTEGER:
182 case ACPI_TYPE_STRING:
183 case ACPI_TYPE_BUFFER:
186 * These types we will allow, but we will change the type.
187 * This enables some existing code of the form:
190 * Scope (DEB) { ... }
192 ACPI_WARNING((AE_INFO,
193 "Type override - [%4.4s] had invalid type (%s) "
194 "for Scope operator, changed to type ANY",
195 acpi_ut_get_node_name(node),
196 acpi_ut_get_type_name(node->type)));
198 node->type = ACPI_TYPE_ANY;
199 walk_state->scope_info->common.value = ACPI_TYPE_ANY;
202 case ACPI_TYPE_METHOD:
205 * Allow scope change to root during execution of module-level
206 * code. Root is typed METHOD during this time.
208 if ((node == acpi_gbl_root_node) &&
210 parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
214 /*lint -fallthrough */
218 /* All other types are an error */
221 "Invalid type (%s) for target of "
222 "Scope operator [%4.4s] (Cannot override)",
223 acpi_ut_get_type_name(node->type),
224 acpi_ut_get_node_name(node)));
226 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
232 /* All other opcodes */
234 if (op && op->common.node) {
236 /* This op/node was previously entered into the namespace */
238 node = op->common.node;
240 if (acpi_ns_opens_scope(object_type)) {
242 acpi_ds_scope_stack_push(node, object_type,
244 if (ACPI_FAILURE(status)) {
245 return_ACPI_STATUS(status);
249 return_ACPI_STATUS(AE_OK);
253 * Enter the named type into the internal namespace. We enter the name
254 * as we go downward in the parse tree. Any necessary subobjects that
255 * involve arguments to the opcode must be created as we go back up the
258 * Note: Name may already exist if we are executing a deferred opcode.
260 if (walk_state->deferred_node) {
262 /* This name is already in the namespace, get the node */
264 node = walk_state->deferred_node;
269 flags = ACPI_NS_NO_UPSEARCH;
270 if (walk_state->pass_number == ACPI_IMODE_EXECUTE) {
272 /* Execution mode, node cannot already exist, node is temporary */
274 flags |= ACPI_NS_ERROR_IF_FOUND;
278 parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
279 flags |= ACPI_NS_TEMPORARY;
282 #ifdef ACPI_ASL_COMPILER
285 * Do not open a scope for AML_EXTERNAL_OP
286 * acpi_ns_lookup can open a new scope based on the object type
287 * of this op. AML_EXTERNAL_OP is a declaration rather than a
288 * definition. In the case that this external is a method object,
289 * acpi_ns_lookup will open a new scope. However, an AML_EXTERNAL_OP
290 * associated with the ACPI_TYPE_METHOD is a declaration, rather than
291 * a definition. Flags is set to avoid opening a scope for any
294 if (walk_state->opcode == AML_EXTERNAL_OP) {
295 flags |= ACPI_NS_DONT_OPEN_SCOPE;
299 /* Add new entry or lookup existing entry */
302 acpi_ns_lookup(walk_state->scope_info, buffer_ptr,
303 object_type, ACPI_IMODE_LOAD_PASS2, flags,
306 if (ACPI_SUCCESS(status) && (flags & ACPI_NS_TEMPORARY)) {
307 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
308 "***New Node [%4.4s] %p is temporary\n",
309 acpi_ut_get_node_name(node), node));
314 if (ACPI_FAILURE(status)) {
315 ACPI_ERROR_NAMESPACE(walk_state->scope_info,
317 return_ACPI_STATUS(status);
322 /* Create a new op */
324 op = acpi_ps_alloc_op(walk_state->opcode, walk_state->aml);
326 return_ACPI_STATUS(AE_NO_MEMORY);
329 /* Initialize the new op */
332 op->named.name = node->name.integer;
338 * Put the Node in the "op" object that the parser uses, so we
339 * can get it again quickly when this scope is closed
341 op->common.node = node;
342 return_ACPI_STATUS(status);
345 /*******************************************************************************
347 * FUNCTION: acpi_ds_load2_end_op
349 * PARAMETERS: walk_state - Current state of the parse tree walk
353 * DESCRIPTION: Ascending callback used during the loading of the namespace,
354 * both control methods and everything else.
356 ******************************************************************************/
358 acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state)
360 union acpi_parse_object *op;
361 acpi_status status = AE_OK;
362 acpi_object_type object_type;
363 struct acpi_namespace_node *node;
364 union acpi_parse_object *arg;
365 struct acpi_namespace_node *new_node;
366 #ifndef ACPI_NO_METHOD_EXECUTION
371 ACPI_FUNCTION_TRACE(ds_load2_end_op);
374 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
375 walk_state->op_info->name, op, walk_state));
377 /* Check if opcode had an associated namespace object */
379 if (!(walk_state->op_info->flags & AML_NSOBJECT)) {
380 return_ACPI_STATUS(AE_OK);
383 if (op->common.aml_opcode == AML_SCOPE_OP) {
384 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
385 "Ending scope Op=%p State=%p\n", op,
389 object_type = walk_state->op_info->object_type;
392 * Get the Node/name from the earlier lookup
393 * (It was saved in the *op structure)
395 node = op->common.node;
398 * Put the Node on the object stack (Contains the ACPI Name of
401 walk_state->operands[0] = (void *)node;
402 walk_state->num_operands = 1;
404 /* Pop the scope stack */
406 if (acpi_ns_opens_scope(object_type) &&
407 (op->common.aml_opcode != AML_INT_METHODCALL_OP)) {
408 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
409 "(%s) Popping scope for Op %p\n",
410 acpi_ut_get_type_name(object_type), op));
412 status = acpi_ds_scope_stack_pop(walk_state);
413 if (ACPI_FAILURE(status)) {
419 * Named operations are as follows:
424 * AML_CREATEBYTEFIELD
425 * AML_CREATEDWORDFIELD
427 * AML_CREATEQWORDFIELD
428 * AML_CREATEWORDFIELD
446 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
447 "Create-Load [%s] State=%p Op=%p NamedObj=%p\n",
448 acpi_ps_get_opcode_name(op->common.aml_opcode),
449 walk_state, op, node));
451 /* Decode the opcode */
453 arg = op->common.value.arg;
455 switch (walk_state->op_info->type) {
456 #ifndef ACPI_NO_METHOD_EXECUTION
458 case AML_TYPE_CREATE_FIELD:
460 * Create the field object, but the field buffer and index must
461 * be evaluated later during the execution phase
463 status = acpi_ds_create_buffer_field(op, walk_state);
466 case AML_TYPE_NAMED_FIELD:
468 * If we are executing a method, initialize the field
470 if (walk_state->method_node) {
471 status = acpi_ds_init_field_objects(op, walk_state);
474 switch (op->common.aml_opcode) {
475 case AML_INDEX_FIELD_OP:
478 acpi_ds_create_index_field(op,
479 (acpi_handle)arg->common.
483 case AML_BANK_FIELD_OP:
486 acpi_ds_create_bank_field(op, arg->common.node,
493 acpi_ds_create_field(op, arg->common.node,
499 /* All NAMED_FIELD opcodes must be handled above */
504 case AML_TYPE_NAMED_SIMPLE:
506 status = acpi_ds_create_operands(walk_state, arg);
507 if (ACPI_FAILURE(status)) {
511 switch (op->common.aml_opcode) {
512 case AML_PROCESSOR_OP:
514 status = acpi_ex_create_processor(walk_state);
517 case AML_POWER_RESOURCE_OP:
519 status = acpi_ex_create_power_resource(walk_state);
524 status = acpi_ex_create_mutex(walk_state);
529 status = acpi_ex_create_event(walk_state);
534 status = acpi_ex_create_alias(walk_state);
545 /* Delete operands */
547 for (i = 1; i < walk_state->num_operands; i++) {
548 acpi_ut_remove_reference(walk_state->operands[i]);
549 walk_state->operands[i] = NULL;
553 #endif /* ACPI_NO_METHOD_EXECUTION */
555 case AML_TYPE_NAMED_COMPLEX:
557 switch (op->common.aml_opcode) {
558 #ifndef ACPI_NO_METHOD_EXECUTION
560 case AML_DATA_REGION_OP:
562 if (op->common.aml_opcode == AML_REGION_OP) {
563 region_space = (acpi_adr_space_type)
564 ((op->common.value.arg)->common.value.
567 region_space = ACPI_ADR_SPACE_DATA_TABLE;
571 * The op_region is not fully parsed at this time. The only valid
572 * argument is the space_id. (We must save the address of the
573 * AML of the address and length operands)
575 * If we have a valid region, initialize it. The namespace is
576 * unlocked at this point.
578 * Need to unlock interpreter if it is locked (if we are running
579 * a control method), in order to allow _REG methods to be run
580 * during acpi_ev_initialize_region.
582 if (walk_state->method_node) {
584 * Executing a method: initialize the region and unlock
587 status = acpi_ex_create_region(op->named.data,
591 if (ACPI_FAILURE(status)) {
592 return_ACPI_STATUS(status);
597 acpi_ev_initialize_region
598 (acpi_ns_get_attached_object(node));
603 status = acpi_ds_create_node(walk_state, node, op);
608 * method_op pkg_length name_string method_flags term_list
610 * Note: We must create the method node/object pair as soon as we
611 * see the method declaration. This allows later pass1 parsing
612 * of invocations of the method (need to know the number of
615 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
616 "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
617 walk_state, op, op->named.node));
619 if (!acpi_ns_get_attached_object(op->named.node)) {
620 walk_state->operands[0] =
621 ACPI_CAST_PTR(void, op->named.node);
622 walk_state->num_operands = 1;
625 acpi_ds_create_operands(walk_state,
628 if (ACPI_SUCCESS(status)) {
630 acpi_ex_create_method(op->named.
637 walk_state->operands[0] = NULL;
638 walk_state->num_operands = 0;
640 if (ACPI_FAILURE(status)) {
641 return_ACPI_STATUS(status);
646 #endif /* ACPI_NO_METHOD_EXECUTION */
650 /* All NAMED_COMPLEX opcodes must be handled above */
655 case AML_CLASS_INTERNAL:
657 /* case AML_INT_NAMEPATH_OP: */
660 case AML_CLASS_METHOD_CALL:
662 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
663 "RESOLVING-MethodCall: State=%p Op=%p NamedObj=%p\n",
664 walk_state, op, node));
667 * Lookup the method name and save the Node
670 acpi_ns_lookup(walk_state->scope_info,
671 arg->common.value.string, ACPI_TYPE_ANY,
672 ACPI_IMODE_LOAD_PASS2,
673 ACPI_NS_SEARCH_PARENT |
674 ACPI_NS_DONT_OPEN_SCOPE, walk_state,
676 if (ACPI_SUCCESS(status)) {
678 * Make sure that what we found is indeed a method
679 * We didn't search for a method on purpose, to see if the name
682 if (new_node->type != ACPI_TYPE_METHOD) {
683 status = AE_AML_OPERAND_TYPE;
686 /* We could put the returned object (Node) on the object stack for
687 * later, but for now, we will put it in the "op" object that the
688 * parser uses, so we can get it again at the end of this scope
690 op->common.node = new_node;
692 ACPI_ERROR_NAMESPACE(walk_state->scope_info,
693 arg->common.value.string, status);
704 /* Remove the Node pushed at the very beginning */
706 walk_state->operands[0] = NULL;
707 walk_state->num_operands = 0;
708 return_ACPI_STATUS(status);