in acpica/dswload.c [396:596]
acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state)
{
union acpi_parse_object *op;
acpi_object_type object_type;
acpi_status status = AE_OK;
#ifdef ACPI_ASL_COMPILER
u8 param_count;
#endif
ACPI_FUNCTION_TRACE(ds_load1_end_op);
op = walk_state->op;
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
walk_state));
/*
* Disassembler: handle create field operators here.
*
* create_buffer_field is a deferred op that is typically processed in load
* pass 2. However, disassembly of control method contents walk the parse
* tree with ACPI_PARSE_LOAD_PASS1 and AML_CREATE operators are processed
* in a later walk. This is a problem when there is a control method that
* has the same name as the AML_CREATE object. In this case, any use of the
* name segment will be detected as a method call rather than a reference
* to a buffer field.
*
* This earlier creation during disassembly solves this issue by inserting
* the named object in the ACPI namespace so that references to this name
* would be a name string rather than a method call.
*/
if ((walk_state->parse_flags & ACPI_PARSE_DISASSEMBLE) &&
(walk_state->op_info->flags & AML_CREATE)) {
status = acpi_ds_create_buffer_field(op, walk_state);
return_ACPI_STATUS(status);
}
/* We are only interested in opcodes that have an associated name */
if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) {
return_ACPI_STATUS(AE_OK);
}
/* Get the object type to determine if we should pop the scope */
object_type = walk_state->op_info->object_type;
if (walk_state->op_info->flags & AML_FIELD) {
/*
* If we are executing a method, do not create any namespace objects
* during the load phase, only during execution.
*/
if (!walk_state->method_node) {
if (walk_state->opcode == AML_FIELD_OP ||
walk_state->opcode == AML_BANK_FIELD_OP ||
walk_state->opcode == AML_INDEX_FIELD_OP) {
status =
acpi_ds_init_field_objects(op, walk_state);
}
}
return_ACPI_STATUS(status);
}
/*
* If we are executing a method, do not create any namespace objects
* during the load phase, only during execution.
*/
if (!walk_state->method_node) {
if (op->common.aml_opcode == AML_REGION_OP) {
status =
acpi_ex_create_region(op->named.data,
op->named.length,
(acpi_adr_space_type)
((op->common.value.arg)->
common.value.integer),
walk_state);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
} else if (op->common.aml_opcode == AML_DATA_REGION_OP) {
status =
acpi_ex_create_region(op->named.data,
op->named.length,
ACPI_ADR_SPACE_DATA_TABLE,
walk_state);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
}
if (op->common.aml_opcode == AML_NAME_OP) {
/* For Name opcode, get the object type from the argument */
if (op->common.value.arg) {
object_type = (acpi_ps_get_opcode_info((op->common.
value.arg)->
common.
aml_opcode))->
object_type;
/* Set node type if we have a namespace node */
if (op->common.node) {
op->common.node->type = (u8) object_type;
}
}
}
#ifdef ACPI_ASL_COMPILER
/*
* For external opcode, get the object type from the argument and
* get the parameter count from the argument's next.
*/
if (acpi_gbl_disasm_flag &&
op->common.node && op->common.aml_opcode == AML_EXTERNAL_OP) {
/*
* Note, if this external is not a method
* Op->Common.Value.Arg->Common.Next->Common.Value.Integer == 0
* Therefore, param_count will be 0.
*/
param_count =
(u8)op->common.value.arg->common.next->common.value.integer;
object_type = (u8)op->common.value.arg->common.value.integer;
op->common.node->flags |= ANOBJ_IS_EXTERNAL;
op->common.node->type = (u8)object_type;
acpi_dm_create_subobject_for_external((u8)object_type,
&op->common.node,
param_count);
/*
* Add the external to the external list because we may be
* emitting code based off of the items within the external list.
*/
acpi_dm_add_op_to_external_list(op, op->named.path,
(u8)object_type, param_count,
ACPI_EXT_ORIGIN_FROM_OPCODE |
ACPI_EXT_RESOLVED_REFERENCE);
}
#endif
/*
* If we are executing a method, do not create any namespace objects
* during the load phase, only during execution.
*/
if (!walk_state->method_node) {
if (op->common.aml_opcode == AML_METHOD_OP) {
/*
* method_op pkg_length name_string method_flags term_list
*
* Note: We must create the method node/object pair as soon as we
* see the method declaration. This allows later pass1 parsing
* of invocations of the method (need to know the number of
* arguments.)
*/
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
"LOADING-Method: State=%p Op=%p NamedObj=%p\n",
walk_state, op, op->named.node));
if (!acpi_ns_get_attached_object(op->named.node)) {
walk_state->operands[0] =
ACPI_CAST_PTR(void, op->named.node);
walk_state->num_operands = 1;
status =
acpi_ds_create_operands(walk_state,
op->common.value.
arg);
if (ACPI_SUCCESS(status)) {
status =
acpi_ex_create_method(op->named.
data,
op->named.
length,
walk_state);
}
walk_state->operands[0] = NULL;
walk_state->num_operands = 0;
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
}
}
/* Pop the scope stack (only if loading a table) */
if (!walk_state->method_node &&
op->common.aml_opcode != AML_EXTERNAL_OP &&
acpi_ns_opens_scope(object_type)) {
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
"(%s): Popping scope for Op %p\n",
acpi_ut_get_type_name(object_type), op));
status = acpi_ds_scope_stack_pop(walk_state);
}
return_ACPI_STATUS(status);
}