acpi_status acpi_initialize_objects(u32 flags)
{
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE("acpi_initialize_objects");
/*
* Run all _REG methods
*
* NOTE: Any objects accessed
* by the _REG methods will be automatically initialized, even if they
* contain executable AML (see call to acpi_ns_initialize_objects below).
*/
if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"[Init] Executing _REG op_region methods\n"));
status = acpi_ev_initialize_op_regions();
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
/*
* Initialize the objects that remain uninitialized. This
* runs the executable AML that may be part of the declaration of these
* objects: operation_regions, buffer_fields, Buffers, and Packages.
*/
if (!(flags & ACPI_NO_OBJECT_INIT)) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"[Init] Completing Initialization of ACPI Objects\n"));
status = acpi_ns_initialize_objects();
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
/*
* Initialize all device objects in the namespace
* This runs the _STA and _INI methods.
*/
if (!(flags & ACPI_NO_DEVICE_INIT)) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"[Init] Initializing ACPI Devices\n"));
status = acpi_ns_initialize_devices();
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
/*
* Empty the caches (delete the cached objects) on the assumption that
* the table load filled them up more than they will be at runtime --
* thus wasting non-paged memory.
*/
status = acpi_purge_cached_objects();
acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK;
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_initialize_objects
*
* PARAMETERS: Flags - Init/enable Options
*
* RETURN: Status
*
* DESCRIPTION: Completes namespace initialization by initializing device
* objects and executing AML code for Regions, buffers, etc.
*
******************************************************************************/
acpi_status acpi_initialize_objects(u32 flags)
{
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE(acpi_initialize_objects);
/*
* Run all _REG methods
*
* Note: Any objects accessed by the _REG methods will be automatically
* initialized, even if they contain executable AML (see the call to
* acpi_ns_initialize_objects below).
*/
if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"[Init] Executing _REG OpRegion methods\n"));
status = acpi_ev_initialize_op_regions();
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
/*
* Execute any module-level code that was detected during the table load
* phase. Although illegal since ACPI 2.0, there are many machines that
* contain this type of code. Each block of detected executable AML code
* outside of any control method is wrapped with a temporary control
* method object and placed on a global list. The methods on this list
* are executed below.
*/
acpi_ns_exec_module_code_list();
/*
* Initialize the objects that remain uninitialized. This runs the
* executable AML that may be part of the declaration of these objects:
* operation_regions, buffer_fields, Buffers, and Packages.
*/
if (!(flags & ACPI_NO_OBJECT_INIT)) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"[Init] Completing Initialization of ACPI Objects\n"));
status = acpi_ns_initialize_objects();
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
/*
* Initialize all device objects in the namespace. This runs the device
* _STA and _INI methods.
*/
if (!(flags & ACPI_NO_DEVICE_INIT)) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"[Init] Initializing ACPI Devices\n"));
status = acpi_ns_initialize_devices();
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
/*
* Empty the caches (delete the cached objects) on the assumption that
* the table load filled them up more than they will be at runtime --
* thus wasting non-paged memory.
*/
status = acpi_purge_cached_objects();
acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK;
return_ACPI_STATUS(status);
}
acpi_status acpi_ns_initialize_devices(u32 flags)
{
acpi_status status = AE_OK;
struct acpi_device_walk_info info;
acpi_handle handle;
ACPI_FUNCTION_TRACE(ns_initialize_devices);
if (!(flags & ACPI_NO_DEVICE_INIT)) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"[Init] Initializing ACPI Devices\n"));
/* Init counters */
info.device_count = 0;
info.num_STA = 0;
info.num_INI = 0;
ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
"Initializing Device/Processor/Thermal objects "
"and executing _INI/_STA methods:\n"));
/* Tree analysis: find all subtrees that contain _INI methods */
status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, FALSE,
acpi_ns_find_ini_methods, NULL,
&info, NULL);
if (ACPI_FAILURE(status)) {
goto error_exit;
}
/* Allocate the evaluation information block */
info.evaluate_info =
ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
if (!info.evaluate_info) {
status = AE_NO_MEMORY;
goto error_exit;
}
/*
* Execute the "global" _INI method that may appear at the root.
* This support is provided for Windows compatibility (Vista+) and
* is not part of the ACPI specification.
*/
info.evaluate_info->prefix_node = acpi_gbl_root_node;
info.evaluate_info->relative_pathname = METHOD_NAME__INI;
info.evaluate_info->parameters = NULL;
info.evaluate_info->flags = ACPI_IGNORE_RETURN_VALUE;
status = acpi_ns_evaluate(info.evaluate_info);
if (ACPI_SUCCESS(status)) {
info.num_INI++;
}
/*
* Execute \_SB._INI.
* There appears to be a strict order requirement for \_SB._INI,
* which should be evaluated before any _REG evaluations.
*/
status = acpi_get_handle(NULL, "\\_SB", &handle);
if (ACPI_SUCCESS(status)) {
memset(info.evaluate_info, 0,
sizeof(struct acpi_evaluate_info));
info.evaluate_info->prefix_node = handle;
info.evaluate_info->relative_pathname =
METHOD_NAME__INI;
info.evaluate_info->parameters = NULL;
info.evaluate_info->flags = ACPI_IGNORE_RETURN_VALUE;
status = acpi_ns_evaluate(info.evaluate_info);
if (ACPI_SUCCESS(status)) {
info.num_INI++;
}
}
}
/*
* Run all _REG methods
*
* Note: Any objects accessed by the _REG methods will be automatically
* initialized, even if they contain executable AML (see the call to
* acpi_ns_initialize_objects below).
*
* Note: According to the ACPI specification, we actually needn't execute
* _REG for system_memory/system_io operation regions, but for PCI_Config
* operation regions, it is required to evaluate _REG for those on a PCI
* root bus that doesn't contain _BBN object. So this code is kept here
* in order not to break things.
*/
if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"[Init] Executing _REG OpRegion methods\n"));
status = acpi_ev_initialize_op_regions();
if (ACPI_FAILURE(status)) {
goto error_exit;
}
}
if (!(flags & ACPI_NO_DEVICE_INIT)) {
/* Walk namespace to execute all _INIs on present devices */
status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, FALSE,
acpi_ns_init_one_device, NULL,
&info, NULL);
/*
* Any _OSI requests should be completed by now. If the BIOS has
* requested any Windows OSI strings, we will always truncate
* I/O addresses to 16 bits -- for Windows compatibility.
*/
if (acpi_gbl_osi_data >= ACPI_OSI_WIN_2000) {
acpi_gbl_truncate_io_addresses = TRUE;
}
ACPI_FREE(info.evaluate_info);
if (ACPI_FAILURE(status)) {
goto error_exit;
}
ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
" Executed %u _INI methods requiring %u _STA executions "
"(examined %u objects)\n",
info.num_INI, info.num_STA,
info.device_count));
}
return_ACPI_STATUS(status);
error_exit:
ACPI_EXCEPTION((AE_INFO, status, "During device initialization"));
return_ACPI_STATUS(status);
}
