*****************************************************************************/
/*
- * Copyright (C) 2000 - 2006, R. Byron Moore
+ * Copyright (C) 2000 - 2008, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
ACPI_FUNCTION_TRACE(ds_create_buffer_field);
- /* Get the name_string argument */
-
+ /*
+ * Get the name_string argument (name of the new buffer_field)
+ */
if (op->common.aml_opcode == AML_CREATE_FIELD_OP) {
+
+ /* For create_field, name is the 4th argument */
+
arg = acpi_ps_get_arg(op, 3);
} else {
- /* Create Bit/Byte/Word/Dword field */
+ /* For all other create_xXXField operators, name is the 3rd argument */
arg = acpi_ps_get_arg(op, 2);
}
node = walk_state->deferred_node;
status = AE_OK;
} else {
- /*
- * During the load phase, we want to enter the name of the field into
- * the namespace. During the execute phase (when we evaluate the size
- * operand), we want to lookup the name
- */
- if (walk_state->parse_flags & ACPI_PARSE_EXECUTE) {
- flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE;
- } else {
- flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
- ACPI_NS_ERROR_IF_FOUND;
+ /* Execute flag should always be set when this function is entered */
+
+ if (!(walk_state->parse_flags & ACPI_PARSE_EXECUTE)) {
+ return_ACPI_STATUS(AE_AML_INTERNAL);
}
- /*
- * Enter the name_string into the namespace
- */
+ /* Creating new namespace node, should not already exist */
+
+ flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
+ ACPI_NS_ERROR_IF_FOUND;
+
+ /* Mark node temporary if we are executing a method */
+
+ if (walk_state->method_node) {
+ flags |= ACPI_NS_TEMPORARY;
+ }
+
+ /* Enter the name_string into the namespace */
+
status =
acpi_ns_lookup(walk_state->scope_info,
arg->common.value.string, ACPI_TYPE_ANY,
ACPI_IMODE_LOAD_PASS1, flags, walk_state,
- &(node));
+ &node);
if (ACPI_FAILURE(status)) {
ACPI_ERROR_NAMESPACE(arg->common.value.string, status);
return_ACPI_STATUS(status);
}
}
- /* We could put the returned object (Node) on the object stack for later,
+ /*
+ * We could put the returned object (Node) on the object stack for later,
* but for now, we will put it in the "op" object that the parser uses,
- * so we can get it again at the end of this scope
+ * so we can get it again at the end of this scope.
*/
op->common.node = node;
/*
* If there is no object attached to the node, this node was just created
- * and we need to create the field object. Otherwise, this was a lookup
+ * and we need to create the field object. Otherwise, this was a lookup
* of an existing node and we don't want to create the field object again.
*/
obj_desc = acpi_ns_get_attached_object(node);
}
/*
- * Remember location in AML stream of the field unit
- * opcode and operands -- since the buffer and index
- * operands must be evaluated.
+ * Remember location in AML stream of the field unit opcode and operands --
+ * since the buffer and index operands must be evaluated.
*/
second_desc = obj_desc->common.next_object;
second_desc->extra.aml_start = op->named.data;
case AML_INT_NAMEDFIELD_OP:
- /* Lookup the name */
+ /* Lookup the name, it should already exist */
status = acpi_ns_lookup(walk_state->scope_info,
(char *)&arg->named.name,
if (ACPI_FAILURE(status)) {
ACPI_ERROR_NAMESPACE((char *)&arg->named.name,
status);
- if (status != AE_ALREADY_EXISTS) {
- return_ACPI_STATUS(status);
- }
-
- /* Already exists, ignore error */
+ return_ACPI_STATUS(status);
} else {
arg->common.node = info->field_node;
info->field_bit_length = arg->common.value.size;
- /* Create and initialize an object for the new Field Node */
-
- status = acpi_ex_prep_field_value(info);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
+ /*
+ * If there is no object attached to the node, this node was
+ * just created and we need to create the field object.
+ * Otherwise, this was a lookup of an existing node and we
+ * don't want to create the field object again.
+ */
+ if (!acpi_ns_get_attached_object
+ (info->field_node)) {
+ status = acpi_ex_prep_field_value(info);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
}
}
union acpi_parse_object *arg = NULL;
struct acpi_namespace_node *node;
u8 type = 0;
+ u32 flags;
ACPI_FUNCTION_TRACE_PTR(ds_init_field_objects, op);
+ /* Execute flag should always be set when this function is entered */
+
+ if (!(walk_state->parse_flags & ACPI_PARSE_EXECUTE)) {
+ if (walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP) {
+
+ /* bank_field Op is deferred, just return OK */
+
+ return_ACPI_STATUS(AE_OK);
+ }
+
+ return_ACPI_STATUS(AE_AML_INTERNAL);
+ }
+
+ /*
+ * Get the field_list argument for this opcode. This is the start of the
+ * list of field elements.
+ */
switch (walk_state->opcode) {
case AML_FIELD_OP:
arg = acpi_ps_get_arg(op, 2);
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
+ /* Creating new namespace node(s), should not already exist */
+
+ flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
+ ACPI_NS_ERROR_IF_FOUND;
+
+ /* Mark node(s) temporary if we are executing a method */
+
+ if (walk_state->method_node) {
+ flags |= ACPI_NS_TEMPORARY;
+ }
+
/*
* Walk the list of entries in the field_list
+ * Note: field_list can be of zero length. In this case, Arg will be NULL.
*/
while (arg) {
-
- /* Ignore OFFSET and ACCESSAS terms here */
-
+ /*
+ * Ignore OFFSET and ACCESSAS terms here; we are only interested in the
+ * field names in order to enter them into the namespace.
+ */
if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) {
status = acpi_ns_lookup(walk_state->scope_info,
- (char *)&arg->named.name,
- type, ACPI_IMODE_LOAD_PASS1,
- ACPI_NS_NO_UPSEARCH |
- ACPI_NS_DONT_OPEN_SCOPE |
- ACPI_NS_ERROR_IF_FOUND,
+ (char *)&arg->named.name, type,
+ ACPI_IMODE_LOAD_PASS1, flags,
walk_state, &node);
if (ACPI_FAILURE(status)) {
ACPI_ERROR_NAMESPACE((char *)&arg->named.name,
arg->common.node = node;
}
- /* Move to next field in the list */
+ /* Get the next field element in the list */
arg = arg->common.next;
}
*
* PARAMETERS: Op - Op containing the Field definition and args
* region_node - Object for the containing Operation Region
- * ` walk_state - Current method state
+ * walk_state - Current method state
*
* RETURN: Status
*
return_ACPI_STATUS(status);
}
- /* Third arg is the bank_value */
-
+ /*
+ * Third arg is the bank_value
+ * This arg is a term_arg, not a constant
+ * It will be evaluated later, by acpi_ds_eval_bank_field_operands
+ */
arg = arg->common.next;
- info.bank_value = (u32) arg->common.value.integer;
/* Fourth arg is the field flags */
info.field_type = ACPI_TYPE_LOCAL_BANK_FIELD;
info.region_node = region_node;
- status = acpi_ds_get_field_names(&info, walk_state, arg->common.next);
+ /*
+ * Use Info.data_register_node to store bank_field Op
+ * It's safe because data_register_node will never be used when create bank field
+ * We store aml_start and aml_length in the bank_field Op for late evaluation
+ * Used in acpi_ex_prep_field_value(Info)
+ *
+ * TBD: Or, should we add a field in struct acpi_create_field_info, like "void *ParentOp"?
+ */
+ info.data_register_node = (struct acpi_namespace_node *)op;
+ status = acpi_ds_get_field_names(&info, walk_state, arg->common.next);
return_ACPI_STATUS(status);
}
git.openpandora.org / pandora-kernel.git / blobdiff