/*******************************************************************************
*
* FUNCTION: acpi_load_table
*
* PARAMETERS: table - Pointer to a buffer containing the ACPI
* table to be loaded.
*
* RETURN: Status
*
* DESCRIPTION: Dynamically load an ACPI table from the caller's buffer. Must
* be a valid ACPI table with a valid ACPI table header.
* Note1: Mainly intended to support hotplug addition of SSDTs.
* Note2: Does not copy the incoming table. User is responsible
* to ensure that the table is not deleted or unmapped.
*
******************************************************************************/
acpi_status acpi_load_table(struct acpi_table_header *table)
{
acpi_status status;
u32 table_index;
ACPI_FUNCTION_TRACE(acpi_load_table);
/* Parameter validation */
if (!table) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Must acquire the interpreter lock during this operation */
status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Install the table and load it into the namespace */
ACPI_INFO((AE_INFO, "Host-directed Dynamic ACPI Table Load:"));
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
status = acpi_tb_install_standard_table(ACPI_PTR_TO_PHYSADDR(table),
ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL,
TRUE, FALSE, &table_index);
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
if (ACPI_FAILURE(status)) {
goto unlock_and_exit;
}
/*
* Note: Now table is "INSTALLED", it must be validated before
* using.
*/
status =
acpi_tb_validate_table(&acpi_gbl_root_table_list.
tables[table_index]);
if (ACPI_FAILURE(status)) {
goto unlock_and_exit;
}
status = acpi_ns_load_table(table_index, acpi_gbl_root_node);
/* Invoke table handler if present */
if (acpi_gbl_table_handler) {
(void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, table,
acpi_gbl_table_handler_context);
}
unlock_and_exit:
(void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
return_ACPI_STATUS(status);
}
acpi_status acpi_load_table(struct acpi_table_header *table)
{
acpi_status status;
struct acpi_table_desc table_desc;
u32 table_index;
ACPI_FUNCTION_TRACE(acpi_load_table);
/* Parameter validation */
if (!table) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Init local table descriptor */
ACPI_MEMSET(&table_desc, 0, sizeof(struct acpi_table_desc));
table_desc.address = ACPI_PTR_TO_PHYSADDR(table);
table_desc.pointer = table;
table_desc.length = table->length;
table_desc.flags = ACPI_TABLE_ORIGIN_UNKNOWN;
/* Must acquire the interpreter lock during this operation */
status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Install the table and load it into the namespace */
ACPI_INFO((AE_INFO, "Host-directed Dynamic ACPI Table Load:"));
status = acpi_tb_add_table(&table_desc, &table_index);
if (ACPI_FAILURE(status)) {
goto unlock_and_exit;
}
status = acpi_ns_load_table(table_index, acpi_gbl_root_node);
/* Invoke table handler if present */
if (acpi_gbl_table_handler) {
(void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, table,
acpi_gbl_table_handler_context);
}
unlock_and_exit:
(void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
return_ACPI_STATUS(status);
}
acpi_status acpi_ex_unload_table(union acpi_operand_object *ddb_handle)
{
acpi_status status = AE_OK;
union acpi_operand_object *table_desc = ddb_handle;
u32 table_index;
struct acpi_table_header *table;
ACPI_FUNCTION_TRACE(ex_unload_table);
/*
* Validate the handle
* Although the handle is partially validated in acpi_ex_reconfiguration(),
* when it calls acpi_ex_resolve_operands(), the handle is more completely
* validated here.
*/
if ((!ddb_handle) ||
(ACPI_GET_DESCRIPTOR_TYPE(ddb_handle) != ACPI_DESC_TYPE_OPERAND) ||
(ACPI_GET_OBJECT_TYPE(ddb_handle) != ACPI_TYPE_LOCAL_REFERENCE)) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Get the table index from the ddb_handle (acpi_size for 64-bit case) */
table_index = (u32) (acpi_size) table_desc->reference.object;
/* Invoke table handler if present */
if (acpi_gbl_table_handler) {
status = acpi_get_table_by_index(table_index, &table);
if (ACPI_SUCCESS(status)) {
(void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_UNLOAD,
table,
acpi_gbl_table_handler_context);
}
}
/*
* Delete the entire namespace under this table Node
* (Offset contains the table_id)
*/
acpi_tb_delete_namespace_by_owner(table_index);
(void)acpi_tb_release_owner_id(table_index);
acpi_tb_set_table_loaded_flag(table_index, FALSE);
/* Table unloaded, remove a reference to the ddb_handle object */
acpi_ut_remove_reference(ddb_handle);
return_ACPI_STATUS(AE_OK);
}
acpi_status
acpi_tb_load_table(u32 table_index, struct acpi_namespace_node *parent_node)
{
struct acpi_table_header *table;
acpi_status status;
acpi_owner_id owner_id;
ACPI_FUNCTION_TRACE(tb_load_table);
/*
* Note: Now table is "INSTALLED", it must be validated before
* using.
*/
status = acpi_get_table_by_index(table_index, &table);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
status = acpi_ns_load_table(table_index, parent_node);
/* Execute any module-level code that was found in the table */
if (!acpi_gbl_parse_table_as_term_list
&& acpi_gbl_group_module_level_code) {
acpi_ns_exec_module_code_list();
}
/*
* Update GPEs for any new _Lxx/_Exx methods. Ignore errors. The host is
* responsible for discovering any new wake GPEs by running _PRW methods
* that may have been loaded by this table.
*/
status = acpi_tb_get_owner_id(table_index, &owner_id);
if (ACPI_SUCCESS(status)) {
acpi_ev_update_gpes(owner_id);
}
/* Invoke table handler if present */
if (acpi_gbl_table_handler) {
(void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, table,
acpi_gbl_table_handler_context);
}
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_unload_parent_table
*
* PARAMETERS: object - Handle to any namespace object owned by
* the table to be unloaded
*
* RETURN: Status
*
* DESCRIPTION: Via any namespace object within an SSDT or OEMx table, unloads
* the table and deletes all namespace objects associated with
* that table. Unloading of the DSDT is not allowed.
* Note: Mainly intended to support hotplug removal of SSDTs.
*
******************************************************************************/
acpi_status acpi_unload_parent_table(acpi_handle object)
{
struct acpi_namespace_node *node =
ACPI_CAST_PTR(struct acpi_namespace_node, object);
acpi_status status = AE_NOT_EXIST;
acpi_owner_id owner_id;
u32 i;
ACPI_FUNCTION_TRACE(acpi_unload_parent_table);
/* Parameter validation */
if (!object) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/*
* The node owner_id is currently the same as the parent table ID.
* However, this could change in the future.
*/
owner_id = node->owner_id;
if (!owner_id) {
/* owner_id==0 means DSDT is the owner. DSDT cannot be unloaded */
return_ACPI_STATUS(AE_TYPE);
}
/* Must acquire the interpreter lock during this operation */
status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Find the table in the global table list */
for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) {
if (owner_id != acpi_gbl_root_table_list.tables[i].owner_id) {
continue;
}
/*
* Allow unload of SSDT and OEMx tables only. Do not allow unload
* of the DSDT. No other types of tables should get here, since
* only these types can contain AML and thus are the only types
* that can create namespace objects.
*/
if (ACPI_COMPARE_NAME
(acpi_gbl_root_table_list.tables[i].signature.ascii,
ACPI_SIG_DSDT)) {
status = AE_TYPE;
break;
}
/* Ensure the table is actually loaded */
if (!acpi_tb_is_table_loaded(i)) {
status = AE_NOT_EXIST;
break;
}
/* Invoke table handler if present */
if (acpi_gbl_table_handler) {
(void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_UNLOAD,
acpi_gbl_root_table_list.
tables[i].pointer,
acpi_gbl_table_handler_context);
}
/*
* Delete all namespace objects owned by this table. Note that
* these objects can appear anywhere in the namespace by virtue
* of the AML "Scope" operator. Thus, we need to track ownership
* by an ID, not simply a position within the hierarchy.
*/
status = acpi_tb_delete_namespace_by_owner(i);
if (ACPI_FAILURE(status)) {
break;
}
status = acpi_tb_release_owner_id(i);
acpi_tb_set_table_loaded_flag(i, FALSE);
break;
}
(void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
return_ACPI_STATUS(status);
}
acpi_status
acpi_ex_load_op(union acpi_operand_object *obj_desc,
union acpi_operand_object *target,
struct acpi_walk_state *walk_state)
{
union acpi_operand_object *ddb_handle;
struct acpi_table_desc table_desc;
u32 table_index;
acpi_status status;
u32 length;
ACPI_FUNCTION_TRACE(ex_load_op);
ACPI_MEMSET(&table_desc, 0, sizeof(struct acpi_table_desc));
/* Source Object can be either an op_region or a Buffer/Field */
switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
case ACPI_TYPE_REGION:
ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Load from Region %p %s\n",
obj_desc,
acpi_ut_get_object_type_name(obj_desc)));
/* Region must be system_memory (from ACPI spec) */
if (obj_desc->region.space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) {
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
}
/*
* If the Region Address and Length have not been previously evaluated,
* evaluate them now and save the results.
*/
if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) {
status = acpi_ds_get_region_arguments(obj_desc);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
/*
* We will simply map the memory region for the table. However, the
* memory region is technically not guaranteed to remain stable and
* we may eventually have to copy the table to a local buffer.
*/
table_desc.address = obj_desc->region.address;
table_desc.length = obj_desc->region.length;
table_desc.flags = ACPI_TABLE_ORIGIN_MAPPED;
break;
case ACPI_TYPE_BUFFER: /* Buffer or resolved region_field */
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Load from Buffer or Field %p %s\n", obj_desc,
acpi_ut_get_object_type_name(obj_desc)));
length = obj_desc->buffer.length;
/* Must have at least an ACPI table header */
if (length < sizeof(struct acpi_table_header)) {
return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
}
/* Validate checksum here. It won't get validated in tb_add_table */
status =
acpi_tb_verify_checksum(ACPI_CAST_PTR
(struct acpi_table_header,
obj_desc->buffer.pointer), length);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/*
* We need to copy the buffer since the original buffer could be
* changed or deleted in the future
*/
table_desc.pointer = ACPI_ALLOCATE(length);
if (!table_desc.pointer) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
ACPI_MEMCPY(table_desc.pointer, obj_desc->buffer.pointer,
length);
table_desc.length = length;
table_desc.flags = ACPI_TABLE_ORIGIN_ALLOCATED;
break;
default:
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
}
/*
* Install the new table into the local data structures
*/
status = acpi_tb_add_table(&table_desc, &table_index);
if (ACPI_FAILURE(status)) {
goto cleanup;
}
/*
* Add the table to the namespace.
*
* Note: We load the table objects relative to the root of the namespace.
* This appears to go against the ACPI specification, but we do it for
* compatibility with other ACPI implementations.
*/
status =
acpi_ex_add_table(table_index, acpi_gbl_root_node, &ddb_handle);
if (ACPI_FAILURE(status)) {
/* On error, table_ptr was deallocated above */
return_ACPI_STATUS(status);
}
/* Store the ddb_handle into the Target operand */
status = acpi_ex_store(ddb_handle, target, walk_state);
if (ACPI_FAILURE(status)) {
(void)acpi_ex_unload_table(ddb_handle);
/* table_ptr was deallocated above */
acpi_ut_remove_reference(ddb_handle);
return_ACPI_STATUS(status);
}
/* Invoke table handler if present */
if (acpi_gbl_table_handler) {
(void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD,
table_desc.pointer,
acpi_gbl_table_handler_context);
}
cleanup:
if (ACPI_FAILURE(status)) {
/* Delete allocated buffer or mapping */
acpi_tb_delete_table(&table_desc);
}
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_namespace_node *parent_node;
struct acpi_namespace_node *start_node;
struct acpi_namespace_node *parameter_node = NULL;
union acpi_operand_object *ddb_handle;
struct acpi_table_header *table;
u32 table_index;
ACPI_FUNCTION_TRACE(ex_load_table_op);
/* Validate lengths for the signature_string, OEMIDString, OEMtable_iD */
if ((operand[0]->string.length > ACPI_NAME_SIZE) ||
(operand[1]->string.length > ACPI_OEM_ID_SIZE) ||
(operand[2]->string.length > ACPI_OEM_TABLE_ID_SIZE)) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Find the ACPI table in the RSDT/XSDT */
status = acpi_tb_find_table(operand[0]->string.pointer,
operand[1]->string.pointer,
operand[2]->string.pointer, &table_index);
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_index, 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);
}
}
status = acpi_get_table_by_index(table_index, &table);
if (ACPI_SUCCESS(status)) {
ACPI_INFO((AE_INFO,
"Dynamic OEM Table Load - [%.4s] OemId [%.6s] OemTableId [%.8s]",
table->signature, table->oem_id,
table->oem_table_id));
}
/* Invoke table handler if present */
if (acpi_gbl_table_handler) {
(void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD, table,
acpi_gbl_table_handler_context);
}
*return_desc = ddb_handle;
return_ACPI_STATUS(status);
}
