acpi_status
acpi_tb_recognize_table (
struct acpi_table_desc *table_info,
u8 search_type)
{
struct acpi_table_header *table_header;
acpi_status status;
ACPI_FUNCTION_TRACE ("tb_recognize_table");
/* Ensure that we have a valid table pointer */
table_header = (struct acpi_table_header *) table_info->pointer;
if (!table_header) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/*
* We only "recognize" a limited number of ACPI tables -- namely, the
* ones that are used by the subsystem (DSDT, FADT, etc.)
*
* An AE_TABLE_NOT_SUPPORTED means that the table was not recognized.
* This can be any one of many valid ACPI tables, it just isn't one of
* the tables that is consumed by the core subsystem
*/
status = acpi_tb_match_signature (table_header->signature, table_info, search_type);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
status = acpi_tb_validate_table_header (table_header);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Return the table type and length via the info struct */
table_info->length = (acpi_size) table_header->length;
return_ACPI_STATUS (status);
}
acpi_status
acpi_ex_load_table_op(struct acpi_walk_state *walk_state,
union acpi_operand_object **return_desc)
{
acpi_status status;
union acpi_operand_object **operand = &walk_state->operands[0];
struct acpi_table_header *table;
struct acpi_namespace_node *parent_node;
struct acpi_namespace_node *start_node;
struct acpi_namespace_node *parameter_node = NULL;
union acpi_operand_object *ddb_handle;
ACPI_FUNCTION_TRACE(ex_load_table_op);
#if 0
/*
* Make sure that the signature does not match one of the tables that
* is already loaded.
*/
status = acpi_tb_match_signature(operand[0]->string.pointer, NULL);
if (status == AE_OK) {
/* Signature matched -- don't allow override */
return_ACPI_STATUS(AE_ALREADY_EXISTS);
}
#endif
/* Find the ACPI table */
status = acpi_tb_find_table(operand[0]->string.pointer,
operand[1]->string.pointer,
operand[2]->string.pointer, &table);
if (ACPI_FAILURE(status)) {
if (status != AE_NOT_FOUND) {
return_ACPI_STATUS(status);
}
/* Table not found, return an Integer=0 and AE_OK */
ddb_handle = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
if (!ddb_handle) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
ddb_handle->integer.value = 0;
*return_desc = ddb_handle;
return_ACPI_STATUS(AE_OK);
}
/* Default nodes */
start_node = walk_state->scope_info->scope.node;
parent_node = acpi_gbl_root_node;
/* root_path (optional parameter) */
if (operand[3]->string.length > 0) {
/*
* Find the node referenced by the root_path_string. This is the
* location within the namespace where the table will be loaded.
*/
status =
acpi_ns_get_node(start_node, operand[3]->string.pointer,
ACPI_NS_SEARCH_PARENT, &parent_node);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
/* parameter_path (optional parameter) */
if (operand[4]->string.length > 0) {
if ((operand[4]->string.pointer[0] != '\\') &&
(operand[4]->string.pointer[0] != '^')) {
/*
* Path is not absolute, so it will be relative to the node
* referenced by the root_path_string (or the NS root if omitted)
*/
start_node = parent_node;
}
/* Find the node referenced by the parameter_path_string */
status =
acpi_ns_get_node(start_node, operand[4]->string.pointer,
ACPI_NS_SEARCH_PARENT, ¶meter_node);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
/* Load the table into the namespace */
status = acpi_ex_add_table(table, parent_node, &ddb_handle);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Parameter Data (optional) */
if (parameter_node) {
/* Store the parameter data into the optional parameter object */
status = acpi_ex_store(operand[5],
ACPI_CAST_PTR(union acpi_operand_object,
parameter_node),
walk_state);
if (ACPI_FAILURE(status)) {
(void)acpi_ex_unload_table(ddb_handle);
return_ACPI_STATUS(status);
}
}
ACPI_INFO((AE_INFO,
"Dynamic OEM Table Load - [%4.4s] OemId [%6.6s] OemTableId [%8.8s]",
table->signature, table->oem_id, table->oem_table_id));
*return_desc = ddb_handle;
return_ACPI_STATUS(status);
}