2 * acpi_bus.c - ACPI Bus Driver ($Revision: 80 $)
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or (at
11 * your option) any later version.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
25 #include <linux/module.h>
26 #include <linux/init.h>
27 #include <linux/ioport.h>
28 #include <linux/kernel.h>
29 #include <linux/list.h>
30 #include <linux/sched.h>
32 #include <linux/device.h>
33 #include <linux/proc_fs.h>
34 #include <linux/acpi.h>
35 #include <linux/slab.h>
37 #include <asm/mpspec.h>
39 #include <linux/pci.h>
40 #include <acpi/acpi_bus.h>
41 #include <acpi/acpi_drivers.h>
42 #include <acpi/apei.h>
43 #include <linux/dmi.h>
44 #include <linux/suspend.h>
48 #define _COMPONENT ACPI_BUS_COMPONENT
49 ACPI_MODULE_NAME("bus");
51 struct acpi_device
*acpi_root
;
52 struct proc_dir_entry
*acpi_root_dir
;
53 EXPORT_SYMBOL(acpi_root_dir
);
55 #define STRUCT_TO_INT(s) (*((int*)&s))
59 static int set_copy_dsdt(const struct dmi_system_id
*id
)
61 printk(KERN_NOTICE
"%s detected - "
62 "force copy of DSDT to local memory\n", id
->ident
);
63 acpi_gbl_copy_dsdt_locally
= 1;
67 static struct dmi_system_id dsdt_dmi_table
[] __initdata
= {
69 * Invoke DSDT corruption work-around on all Toshiba Satellite.
70 * https://bugzilla.kernel.org/show_bug.cgi?id=14679
73 .callback
= set_copy_dsdt
,
74 .ident
= "TOSHIBA Satellite",
76 DMI_MATCH(DMI_SYS_VENDOR
, "TOSHIBA"),
77 DMI_MATCH(DMI_PRODUCT_NAME
, "Satellite"),
83 static struct dmi_system_id dsdt_dmi_table
[] __initdata
= {
88 /* --------------------------------------------------------------------------
90 -------------------------------------------------------------------------- */
92 int acpi_bus_get_device(acpi_handle handle
, struct acpi_device
**device
)
94 acpi_status status
= AE_OK
;
100 /* TBD: Support fixed-feature devices */
102 status
= acpi_get_data(handle
, acpi_bus_data_handler
, (void **)device
);
103 if (ACPI_FAILURE(status
) || !*device
) {
104 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "No context for object [%p]\n",
112 EXPORT_SYMBOL(acpi_bus_get_device
);
114 acpi_status
acpi_bus_get_status_handle(acpi_handle handle
,
115 unsigned long long *sta
)
119 status
= acpi_evaluate_integer(handle
, "_STA", NULL
, sta
);
120 if (ACPI_SUCCESS(status
))
123 if (status
== AE_NOT_FOUND
) {
124 *sta
= ACPI_STA_DEVICE_PRESENT
| ACPI_STA_DEVICE_ENABLED
|
125 ACPI_STA_DEVICE_UI
| ACPI_STA_DEVICE_FUNCTIONING
;
131 int acpi_bus_get_status(struct acpi_device
*device
)
134 unsigned long long sta
;
136 status
= acpi_bus_get_status_handle(device
->handle
, &sta
);
137 if (ACPI_FAILURE(status
))
140 STRUCT_TO_INT(device
->status
) = (int) sta
;
142 if (device
->status
.functional
&& !device
->status
.present
) {
143 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Device [%s] status [%08x]: "
144 "functional but not present;\n",
146 (u32
) STRUCT_TO_INT(device
->status
)));
149 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Device [%s] status [%08x]\n",
151 (u32
) STRUCT_TO_INT(device
->status
)));
154 EXPORT_SYMBOL(acpi_bus_get_status
);
156 void acpi_bus_private_data_handler(acpi_handle handle
,
161 EXPORT_SYMBOL(acpi_bus_private_data_handler
);
163 int acpi_bus_get_private_data(acpi_handle handle
, void **data
)
165 acpi_status status
= AE_OK
;
170 status
= acpi_get_data(handle
, acpi_bus_private_data_handler
, data
);
171 if (ACPI_FAILURE(status
) || !*data
) {
172 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "No context for object [%p]\n",
179 EXPORT_SYMBOL(acpi_bus_get_private_data
);
181 static void acpi_print_osc_error(acpi_handle handle
,
182 struct acpi_osc_context
*context
, char *error
)
184 struct acpi_buffer buffer
= {ACPI_ALLOCATE_BUFFER
};
187 if (ACPI_FAILURE(acpi_get_name(handle
, ACPI_FULL_PATHNAME
, &buffer
)))
188 printk(KERN_DEBUG
"%s\n", error
);
190 printk(KERN_DEBUG
"%s:%s\n", (char *)buffer
.pointer
, error
);
191 kfree(buffer
.pointer
);
193 printk(KERN_DEBUG
"_OSC request data:");
194 for (i
= 0; i
< context
->cap
.length
; i
+= sizeof(u32
))
195 printk("%x ", *((u32
*)(context
->cap
.pointer
+ i
)));
199 static acpi_status
acpi_str_to_uuid(char *str
, u8
*uuid
)
202 static int opc_map_to_uuid
[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
203 24, 26, 28, 30, 32, 34};
205 if (strlen(str
) != 36)
206 return AE_BAD_PARAMETER
;
207 for (i
= 0; i
< 36; i
++) {
208 if (i
== 8 || i
== 13 || i
== 18 || i
== 23) {
210 return AE_BAD_PARAMETER
;
211 } else if (!isxdigit(str
[i
]))
212 return AE_BAD_PARAMETER
;
214 for (i
= 0; i
< 16; i
++) {
215 uuid
[i
] = hex_to_bin(str
[opc_map_to_uuid
[i
]]) << 4;
216 uuid
[i
] |= hex_to_bin(str
[opc_map_to_uuid
[i
] + 1]);
221 acpi_status
acpi_run_osc(acpi_handle handle
, struct acpi_osc_context
*context
)
224 struct acpi_object_list input
;
225 union acpi_object in_params
[4];
226 union acpi_object
*out_obj
;
229 struct acpi_buffer output
= {ACPI_ALLOCATE_BUFFER
, NULL
};
233 if (ACPI_FAILURE(acpi_str_to_uuid(context
->uuid_str
, uuid
)))
235 context
->ret
.length
= ACPI_ALLOCATE_BUFFER
;
236 context
->ret
.pointer
= NULL
;
238 /* Setting up input parameters */
240 input
.pointer
= in_params
;
241 in_params
[0].type
= ACPI_TYPE_BUFFER
;
242 in_params
[0].buffer
.length
= 16;
243 in_params
[0].buffer
.pointer
= uuid
;
244 in_params
[1].type
= ACPI_TYPE_INTEGER
;
245 in_params
[1].integer
.value
= context
->rev
;
246 in_params
[2].type
= ACPI_TYPE_INTEGER
;
247 in_params
[2].integer
.value
= context
->cap
.length
/sizeof(u32
);
248 in_params
[3].type
= ACPI_TYPE_BUFFER
;
249 in_params
[3].buffer
.length
= context
->cap
.length
;
250 in_params
[3].buffer
.pointer
= context
->cap
.pointer
;
252 status
= acpi_evaluate_object(handle
, "_OSC", &input
, &output
);
253 if (ACPI_FAILURE(status
))
257 return AE_NULL_OBJECT
;
259 out_obj
= output
.pointer
;
260 if (out_obj
->type
!= ACPI_TYPE_BUFFER
261 || out_obj
->buffer
.length
!= context
->cap
.length
) {
262 acpi_print_osc_error(handle
, context
,
263 "_OSC evaluation returned wrong type");
267 /* Need to ignore the bit0 in result code */
268 errors
= *((u32
*)out_obj
->buffer
.pointer
) & ~(1 << 0);
270 if (errors
& OSC_REQUEST_ERROR
)
271 acpi_print_osc_error(handle
, context
,
272 "_OSC request failed");
273 if (errors
& OSC_INVALID_UUID_ERROR
)
274 acpi_print_osc_error(handle
, context
,
275 "_OSC invalid UUID");
276 if (errors
& OSC_INVALID_REVISION_ERROR
)
277 acpi_print_osc_error(handle
, context
,
278 "_OSC invalid revision");
279 if (errors
& OSC_CAPABILITIES_MASK_ERROR
) {
280 if (((u32
*)context
->cap
.pointer
)[OSC_QUERY_TYPE
]
290 context
->ret
.length
= out_obj
->buffer
.length
;
291 context
->ret
.pointer
= kmalloc(context
->ret
.length
, GFP_KERNEL
);
292 if (!context
->ret
.pointer
) {
293 status
= AE_NO_MEMORY
;
296 memcpy(context
->ret
.pointer
, out_obj
->buffer
.pointer
,
297 context
->ret
.length
);
301 kfree(output
.pointer
);
303 context
->ret
.pointer
= NULL
;
306 EXPORT_SYMBOL(acpi_run_osc
);
308 bool osc_sb_apei_support_acked
;
309 static u8 sb_uuid_str
[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
310 static void acpi_bus_osc_support(void)
313 struct acpi_osc_context context
= {
314 .uuid_str
= sb_uuid_str
,
317 .cap
.pointer
= capbuf
,
321 capbuf
[OSC_QUERY_TYPE
] = OSC_QUERY_ENABLE
;
322 capbuf
[OSC_SUPPORT_TYPE
] = OSC_SB_PR3_SUPPORT
; /* _PR3 is in use */
323 #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
324 defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
325 capbuf
[OSC_SUPPORT_TYPE
] |= OSC_SB_PAD_SUPPORT
;
328 #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
329 capbuf
[OSC_SUPPORT_TYPE
] |= OSC_SB_PPC_OST_SUPPORT
;
332 #ifdef ACPI_HOTPLUG_OST
333 capbuf
[OSC_SUPPORT_TYPE
] |= OSC_SB_HOTPLUG_OST_SUPPORT
;
337 capbuf
[OSC_SUPPORT_TYPE
] |= OSC_SB_APEI_SUPPORT
;
338 if (ACPI_FAILURE(acpi_get_handle(NULL
, "\\_SB", &handle
)))
340 if (ACPI_SUCCESS(acpi_run_osc(handle
, &context
))) {
341 u32
*capbuf_ret
= context
.ret
.pointer
;
342 if (context
.ret
.length
> OSC_SUPPORT_TYPE
)
343 osc_sb_apei_support_acked
=
344 capbuf_ret
[OSC_SUPPORT_TYPE
] & OSC_SB_APEI_SUPPORT
;
345 kfree(context
.ret
.pointer
);
347 /* do we need to check other returned cap? Sounds no */
350 /* --------------------------------------------------------------------------
352 -------------------------------------------------------------------------- */
354 #ifdef CONFIG_ACPI_PROC_EVENT
355 static DEFINE_SPINLOCK(acpi_bus_event_lock
);
357 LIST_HEAD(acpi_bus_event_list
);
358 DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue
);
360 extern int event_is_open
;
362 int acpi_bus_generate_proc_event4(const char *device_class
, const char *bus_id
, u8 type
, int data
)
364 struct acpi_bus_event
*event
;
365 unsigned long flags
= 0;
367 /* drop event on the floor if no one's listening */
371 event
= kzalloc(sizeof(struct acpi_bus_event
), GFP_ATOMIC
);
375 strcpy(event
->device_class
, device_class
);
376 strcpy(event
->bus_id
, bus_id
);
380 spin_lock_irqsave(&acpi_bus_event_lock
, flags
);
381 list_add_tail(&event
->node
, &acpi_bus_event_list
);
382 spin_unlock_irqrestore(&acpi_bus_event_lock
, flags
);
384 wake_up_interruptible(&acpi_bus_event_queue
);
390 EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4
);
392 int acpi_bus_generate_proc_event(struct acpi_device
*device
, u8 type
, int data
)
396 return acpi_bus_generate_proc_event4(device
->pnp
.device_class
,
397 device
->pnp
.bus_id
, type
, data
);
400 EXPORT_SYMBOL(acpi_bus_generate_proc_event
);
402 int acpi_bus_receive_event(struct acpi_bus_event
*event
)
404 unsigned long flags
= 0;
405 struct acpi_bus_event
*entry
= NULL
;
407 DECLARE_WAITQUEUE(wait
, current
);
413 if (list_empty(&acpi_bus_event_list
)) {
415 set_current_state(TASK_INTERRUPTIBLE
);
416 add_wait_queue(&acpi_bus_event_queue
, &wait
);
418 if (list_empty(&acpi_bus_event_list
))
421 remove_wait_queue(&acpi_bus_event_queue
, &wait
);
422 set_current_state(TASK_RUNNING
);
424 if (signal_pending(current
))
428 spin_lock_irqsave(&acpi_bus_event_lock
, flags
);
429 if (!list_empty(&acpi_bus_event_list
)) {
430 entry
= list_entry(acpi_bus_event_list
.next
,
431 struct acpi_bus_event
, node
);
432 list_del(&entry
->node
);
434 spin_unlock_irqrestore(&acpi_bus_event_lock
, flags
);
439 memcpy(event
, entry
, sizeof(struct acpi_bus_event
));
446 #endif /* CONFIG_ACPI_PROC_EVENT */
448 /* --------------------------------------------------------------------------
449 Notification Handling
450 -------------------------------------------------------------------------- */
452 static void acpi_bus_check_device(acpi_handle handle
)
454 struct acpi_device
*device
;
456 struct acpi_device_status old_status
;
458 if (acpi_bus_get_device(handle
, &device
))
463 old_status
= device
->status
;
466 * Make sure this device's parent is present before we go about
467 * messing with the device.
469 if (device
->parent
&& !device
->parent
->status
.present
) {
470 device
->status
= device
->parent
->status
;
474 status
= acpi_bus_get_status(device
);
475 if (ACPI_FAILURE(status
))
478 if (STRUCT_TO_INT(old_status
) == STRUCT_TO_INT(device
->status
))
482 * Device Insertion/Removal
484 if ((device
->status
.present
) && !(old_status
.present
)) {
485 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Device insertion detected\n"));
486 /* TBD: Handle device insertion */
487 } else if (!(device
->status
.present
) && (old_status
.present
)) {
488 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Device removal detected\n"));
489 /* TBD: Handle device removal */
493 static void acpi_bus_check_scope(acpi_handle handle
)
496 acpi_bus_check_device(handle
);
499 * TBD: Enumerate child devices within this device's scope and
500 * run acpi_bus_check_device()'s on them.
504 static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list
);
505 int register_acpi_bus_notifier(struct notifier_block
*nb
)
507 return blocking_notifier_chain_register(&acpi_bus_notify_list
, nb
);
509 EXPORT_SYMBOL_GPL(register_acpi_bus_notifier
);
511 void unregister_acpi_bus_notifier(struct notifier_block
*nb
)
513 blocking_notifier_chain_unregister(&acpi_bus_notify_list
, nb
);
515 EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier
);
520 * Callback for all 'system-level' device notifications (values 0x00-0x7F).
522 static void acpi_bus_notify(acpi_handle handle
, u32 type
, void *data
)
524 struct acpi_device
*device
= NULL
;
525 struct acpi_driver
*driver
;
527 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Notification %#02x to handle %p\n",
530 blocking_notifier_call_chain(&acpi_bus_notify_list
,
531 type
, (void *)handle
);
535 case ACPI_NOTIFY_BUS_CHECK
:
536 acpi_bus_check_scope(handle
);
538 * TBD: We'll need to outsource certain events to non-ACPI
539 * drivers via the device manager (device.c).
543 case ACPI_NOTIFY_DEVICE_CHECK
:
544 acpi_bus_check_device(handle
);
546 * TBD: We'll need to outsource certain events to non-ACPI
547 * drivers via the device manager (device.c).
551 case ACPI_NOTIFY_DEVICE_WAKE
:
555 case ACPI_NOTIFY_EJECT_REQUEST
:
559 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT
:
560 /* TBD: Exactly what does 'light' mean? */
563 case ACPI_NOTIFY_FREQUENCY_MISMATCH
:
567 case ACPI_NOTIFY_BUS_MODE_MISMATCH
:
571 case ACPI_NOTIFY_POWER_FAULT
:
576 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
577 "Received unknown/unsupported notification [%08x]\n",
582 acpi_bus_get_device(handle
, &device
);
584 driver
= device
->driver
;
585 if (driver
&& driver
->ops
.notify
&&
586 (driver
->flags
& ACPI_DRIVER_ALL_NOTIFY_EVENTS
))
587 driver
->ops
.notify(device
, type
);
591 /* --------------------------------------------------------------------------
592 Initialization/Cleanup
593 -------------------------------------------------------------------------- */
595 static int __init
acpi_bus_init_irq(void)
597 acpi_status status
= AE_OK
;
598 union acpi_object arg
= { ACPI_TYPE_INTEGER
};
599 struct acpi_object_list arg_list
= { 1, &arg
};
600 char *message
= NULL
;
604 * Let the system know what interrupt model we are using by
605 * evaluating the \_PIC object, if exists.
608 switch (acpi_irq_model
) {
609 case ACPI_IRQ_MODEL_PIC
:
612 case ACPI_IRQ_MODEL_IOAPIC
:
615 case ACPI_IRQ_MODEL_IOSAPIC
:
618 case ACPI_IRQ_MODEL_PLATFORM
:
619 message
= "platform specific model";
622 printk(KERN_WARNING PREFIX
"Unknown interrupt routing model\n");
626 printk(KERN_INFO PREFIX
"Using %s for interrupt routing\n", message
);
628 arg
.integer
.value
= acpi_irq_model
;
630 status
= acpi_evaluate_object(NULL
, "\\_PIC", &arg_list
, NULL
);
631 if (ACPI_FAILURE(status
) && (status
!= AE_NOT_FOUND
)) {
632 ACPI_EXCEPTION((AE_INFO
, status
, "Evaluating _PIC"));
639 u8 acpi_gbl_permanent_mmap
;
642 void __init
acpi_early_init(void)
644 acpi_status status
= AE_OK
;
649 printk(KERN_INFO PREFIX
"Core revision %08x\n", ACPI_CA_VERSION
);
651 /* enable workarounds, unless strict ACPI spec. compliance */
653 acpi_gbl_enable_interpreter_slack
= TRUE
;
655 acpi_gbl_permanent_mmap
= 1;
658 * If the machine falls into the DMI check table,
659 * DSDT will be copied to memory
661 dmi_check_system(dsdt_dmi_table
);
663 status
= acpi_reallocate_root_table();
664 if (ACPI_FAILURE(status
)) {
665 printk(KERN_ERR PREFIX
666 "Unable to reallocate ACPI tables\n");
670 status
= acpi_initialize_subsystem();
671 if (ACPI_FAILURE(status
)) {
672 printk(KERN_ERR PREFIX
673 "Unable to initialize the ACPI Interpreter\n");
677 status
= acpi_load_tables();
678 if (ACPI_FAILURE(status
)) {
679 printk(KERN_ERR PREFIX
680 "Unable to load the System Description Tables\n");
686 /* compatible (0) means level (3) */
687 if (!(acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
)) {
688 acpi_sci_flags
&= ~ACPI_MADT_TRIGGER_MASK
;
689 acpi_sci_flags
|= ACPI_MADT_TRIGGER_LEVEL
;
691 /* Set PIC-mode SCI trigger type */
692 acpi_pic_sci_set_trigger(acpi_gbl_FADT
.sci_interrupt
,
693 (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2);
696 * now that acpi_gbl_FADT is initialized,
697 * update it with result from INT_SRC_OVR parsing
699 acpi_gbl_FADT
.sci_interrupt
= acpi_sci_override_gsi
;
703 status
= acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE
);
704 if (ACPI_FAILURE(status
)) {
705 printk(KERN_ERR PREFIX
"Unable to enable ACPI\n");
716 static int __init
acpi_bus_init(void)
719 acpi_status status
= AE_OK
;
720 extern acpi_status
acpi_os_initialize1(void);
722 acpi_os_initialize1();
724 status
= acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE
);
725 if (ACPI_FAILURE(status
)) {
726 printk(KERN_ERR PREFIX
727 "Unable to start the ACPI Interpreter\n");
732 * ACPI 2.0 requires the EC driver to be loaded and work before
733 * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
736 * This is accomplished by looking for the ECDT table, and getting
737 * the EC parameters out of that.
739 status
= acpi_ec_ecdt_probe();
740 /* Ignore result. Not having an ECDT is not fatal. */
742 status
= acpi_initialize_objects(ACPI_FULL_INITIALIZATION
);
743 if (ACPI_FAILURE(status
)) {
744 printk(KERN_ERR PREFIX
"Unable to initialize ACPI objects\n");
749 * _OSC method may exist in module level code,
750 * so it must be run after ACPI_FULL_INITIALIZATION
752 acpi_bus_osc_support();
755 * _PDC control method may load dynamic SSDT tables,
756 * and we need to install the table handler before that.
760 acpi_early_processor_set_pdc();
763 * Maybe EC region is required at bus_scan/acpi_get_devices. So it
764 * is necessary to enable it as early as possible.
766 acpi_boot_ec_enable();
768 printk(KERN_INFO PREFIX
"Interpreter enabled\n");
770 /* Initialize sleep structures */
774 * Get the system interrupt model and evaluate \_PIC.
776 result
= acpi_bus_init_irq();
781 * Register the for all standard device notifications.
784 acpi_install_notify_handler(ACPI_ROOT_OBJECT
, ACPI_SYSTEM_NOTIFY
,
785 &acpi_bus_notify
, NULL
);
786 if (ACPI_FAILURE(status
)) {
787 printk(KERN_ERR PREFIX
788 "Unable to register for device notifications\n");
793 * Create the top ACPI proc directory
795 acpi_root_dir
= proc_mkdir(ACPI_BUS_FILE_ROOT
, NULL
);
799 /* Mimic structured exception handling */
805 struct kobject
*acpi_kobj
;
806 EXPORT_SYMBOL_GPL(acpi_kobj
);
808 static int __init
acpi_init(void)
813 printk(KERN_INFO PREFIX
"Interpreter disabled.\n");
817 acpi_kobj
= kobject_create_and_add("acpi", firmware_kobj
);
819 printk(KERN_WARNING
"%s: kset create error\n", __func__
);
823 init_acpi_device_notify();
824 result
= acpi_bus_init();
830 pci_mmcfg_late_init();
834 acpi_sleep_proc_init();
835 acpi_wakeup_device_init();
839 subsys_initcall(acpi_init
);