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>
36 #include <linux/regulator/machine.h>
38 #include <asm/mpspec.h>
40 #include <linux/pci.h>
41 #include <acpi/acpi_bus.h>
42 #include <acpi/acpi_drivers.h>
43 #include <acpi/apei.h>
44 #include <linux/dmi.h>
45 #include <linux/suspend.h>
49 #define _COMPONENT ACPI_BUS_COMPONENT
50 ACPI_MODULE_NAME("bus");
52 struct acpi_device
*acpi_root
;
53 struct proc_dir_entry
*acpi_root_dir
;
54 EXPORT_SYMBOL(acpi_root_dir
);
56 #define STRUCT_TO_INT(s) (*((int*)&s))
60 #ifdef CONFIG_ACPI_CUSTOM_DSDT
61 static inline int set_copy_dsdt(const struct dmi_system_id
*id
)
66 static int set_copy_dsdt(const struct dmi_system_id
*id
)
68 printk(KERN_NOTICE
"%s detected - "
69 "force copy of DSDT to local memory\n", id
->ident
);
70 acpi_gbl_copy_dsdt_locally
= 1;
75 static struct dmi_system_id dsdt_dmi_table
[] __initdata
= {
77 * Invoke DSDT corruption work-around on all Toshiba Satellite.
78 * https://bugzilla.kernel.org/show_bug.cgi?id=14679
81 .callback
= set_copy_dsdt
,
82 .ident
= "TOSHIBA Satellite",
84 DMI_MATCH(DMI_SYS_VENDOR
, "TOSHIBA"),
85 DMI_MATCH(DMI_PRODUCT_NAME
, "Satellite"),
91 static struct dmi_system_id dsdt_dmi_table
[] __initdata
= {
96 /* --------------------------------------------------------------------------
98 -------------------------------------------------------------------------- */
100 int acpi_bus_get_device(acpi_handle handle
, struct acpi_device
**device
)
102 acpi_status status
= AE_OK
;
108 /* TBD: Support fixed-feature devices */
110 status
= acpi_get_data(handle
, acpi_bus_data_handler
, (void **)device
);
111 if (ACPI_FAILURE(status
) || !*device
) {
112 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "No context for object [%p]\n",
120 EXPORT_SYMBOL(acpi_bus_get_device
);
122 acpi_status
acpi_bus_get_status_handle(acpi_handle handle
,
123 unsigned long long *sta
)
127 status
= acpi_evaluate_integer(handle
, "_STA", NULL
, sta
);
128 if (ACPI_SUCCESS(status
))
131 if (status
== AE_NOT_FOUND
) {
132 *sta
= ACPI_STA_DEVICE_PRESENT
| ACPI_STA_DEVICE_ENABLED
|
133 ACPI_STA_DEVICE_UI
| ACPI_STA_DEVICE_FUNCTIONING
;
139 int acpi_bus_get_status(struct acpi_device
*device
)
142 unsigned long long sta
;
144 status
= acpi_bus_get_status_handle(device
->handle
, &sta
);
145 if (ACPI_FAILURE(status
))
148 STRUCT_TO_INT(device
->status
) = (int) sta
;
150 if (device
->status
.functional
&& !device
->status
.present
) {
151 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Device [%s] status [%08x]: "
152 "functional but not present;\n",
154 (u32
) STRUCT_TO_INT(device
->status
)));
157 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Device [%s] status [%08x]\n",
159 (u32
) STRUCT_TO_INT(device
->status
)));
162 EXPORT_SYMBOL(acpi_bus_get_status
);
164 void acpi_bus_private_data_handler(acpi_handle handle
,
169 EXPORT_SYMBOL(acpi_bus_private_data_handler
);
171 int acpi_bus_get_private_data(acpi_handle handle
, void **data
)
173 acpi_status status
= AE_OK
;
178 status
= acpi_get_data(handle
, acpi_bus_private_data_handler
, data
);
179 if (ACPI_FAILURE(status
) || !*data
) {
180 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "No context for object [%p]\n",
187 EXPORT_SYMBOL(acpi_bus_get_private_data
);
189 static void acpi_print_osc_error(acpi_handle handle
,
190 struct acpi_osc_context
*context
, char *error
)
192 struct acpi_buffer buffer
= {ACPI_ALLOCATE_BUFFER
};
195 if (ACPI_FAILURE(acpi_get_name(handle
, ACPI_FULL_PATHNAME
, &buffer
)))
196 printk(KERN_DEBUG
"%s\n", error
);
198 printk(KERN_DEBUG
"%s:%s\n", (char *)buffer
.pointer
, error
);
199 kfree(buffer
.pointer
);
201 printk(KERN_DEBUG
"_OSC request data:");
202 for (i
= 0; i
< context
->cap
.length
; i
+= sizeof(u32
))
203 printk("%x ", *((u32
*)(context
->cap
.pointer
+ i
)));
207 static acpi_status
acpi_str_to_uuid(char *str
, u8
*uuid
)
210 static int opc_map_to_uuid
[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
211 24, 26, 28, 30, 32, 34};
213 if (strlen(str
) != 36)
214 return AE_BAD_PARAMETER
;
215 for (i
= 0; i
< 36; i
++) {
216 if (i
== 8 || i
== 13 || i
== 18 || i
== 23) {
218 return AE_BAD_PARAMETER
;
219 } else if (!isxdigit(str
[i
]))
220 return AE_BAD_PARAMETER
;
222 for (i
= 0; i
< 16; i
++) {
223 uuid
[i
] = hex_to_bin(str
[opc_map_to_uuid
[i
]]) << 4;
224 uuid
[i
] |= hex_to_bin(str
[opc_map_to_uuid
[i
] + 1]);
229 acpi_status
acpi_run_osc(acpi_handle handle
, struct acpi_osc_context
*context
)
232 struct acpi_object_list input
;
233 union acpi_object in_params
[4];
234 union acpi_object
*out_obj
;
237 struct acpi_buffer output
= {ACPI_ALLOCATE_BUFFER
, NULL
};
241 if (ACPI_FAILURE(acpi_str_to_uuid(context
->uuid_str
, uuid
)))
243 context
->ret
.length
= ACPI_ALLOCATE_BUFFER
;
244 context
->ret
.pointer
= NULL
;
246 /* Setting up input parameters */
248 input
.pointer
= in_params
;
249 in_params
[0].type
= ACPI_TYPE_BUFFER
;
250 in_params
[0].buffer
.length
= 16;
251 in_params
[0].buffer
.pointer
= uuid
;
252 in_params
[1].type
= ACPI_TYPE_INTEGER
;
253 in_params
[1].integer
.value
= context
->rev
;
254 in_params
[2].type
= ACPI_TYPE_INTEGER
;
255 in_params
[2].integer
.value
= context
->cap
.length
/sizeof(u32
);
256 in_params
[3].type
= ACPI_TYPE_BUFFER
;
257 in_params
[3].buffer
.length
= context
->cap
.length
;
258 in_params
[3].buffer
.pointer
= context
->cap
.pointer
;
260 status
= acpi_evaluate_object(handle
, "_OSC", &input
, &output
);
261 if (ACPI_FAILURE(status
))
265 return AE_NULL_OBJECT
;
267 out_obj
= output
.pointer
;
268 if (out_obj
->type
!= ACPI_TYPE_BUFFER
269 || out_obj
->buffer
.length
!= context
->cap
.length
) {
270 acpi_print_osc_error(handle
, context
,
271 "_OSC evaluation returned wrong type");
275 /* Need to ignore the bit0 in result code */
276 errors
= *((u32
*)out_obj
->buffer
.pointer
) & ~(1 << 0);
278 if (errors
& OSC_REQUEST_ERROR
)
279 acpi_print_osc_error(handle
, context
,
280 "_OSC request failed");
281 if (errors
& OSC_INVALID_UUID_ERROR
)
282 acpi_print_osc_error(handle
, context
,
283 "_OSC invalid UUID");
284 if (errors
& OSC_INVALID_REVISION_ERROR
)
285 acpi_print_osc_error(handle
, context
,
286 "_OSC invalid revision");
287 if (errors
& OSC_CAPABILITIES_MASK_ERROR
) {
288 if (((u32
*)context
->cap
.pointer
)[OSC_QUERY_TYPE
]
298 context
->ret
.length
= out_obj
->buffer
.length
;
299 context
->ret
.pointer
= kmemdup(out_obj
->buffer
.pointer
,
300 context
->ret
.length
, GFP_KERNEL
);
301 if (!context
->ret
.pointer
) {
302 status
= AE_NO_MEMORY
;
308 kfree(output
.pointer
);
310 context
->ret
.pointer
= NULL
;
313 EXPORT_SYMBOL(acpi_run_osc
);
315 bool osc_sb_apei_support_acked
;
316 static u8 sb_uuid_str
[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
317 static void acpi_bus_osc_support(void)
320 struct acpi_osc_context context
= {
321 .uuid_str
= sb_uuid_str
,
324 .cap
.pointer
= capbuf
,
328 capbuf
[OSC_QUERY_TYPE
] = OSC_QUERY_ENABLE
;
329 capbuf
[OSC_SUPPORT_TYPE
] = OSC_SB_PR3_SUPPORT
; /* _PR3 is in use */
330 #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
331 defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
332 capbuf
[OSC_SUPPORT_TYPE
] |= OSC_SB_PAD_SUPPORT
;
335 #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
336 capbuf
[OSC_SUPPORT_TYPE
] |= OSC_SB_PPC_OST_SUPPORT
;
339 #ifdef ACPI_HOTPLUG_OST
340 capbuf
[OSC_SUPPORT_TYPE
] |= OSC_SB_HOTPLUG_OST_SUPPORT
;
344 capbuf
[OSC_SUPPORT_TYPE
] |= OSC_SB_APEI_SUPPORT
;
345 if (ACPI_FAILURE(acpi_get_handle(NULL
, "\\_SB", &handle
)))
347 if (ACPI_SUCCESS(acpi_run_osc(handle
, &context
))) {
348 u32
*capbuf_ret
= context
.ret
.pointer
;
349 if (context
.ret
.length
> OSC_SUPPORT_TYPE
)
350 osc_sb_apei_support_acked
=
351 capbuf_ret
[OSC_SUPPORT_TYPE
] & OSC_SB_APEI_SUPPORT
;
352 kfree(context
.ret
.pointer
);
354 /* do we need to check other returned cap? Sounds no */
357 /* --------------------------------------------------------------------------
359 -------------------------------------------------------------------------- */
361 #ifdef CONFIG_ACPI_PROC_EVENT
362 static DEFINE_SPINLOCK(acpi_bus_event_lock
);
364 LIST_HEAD(acpi_bus_event_list
);
365 DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue
);
367 extern int event_is_open
;
369 int acpi_bus_generate_proc_event4(const char *device_class
, const char *bus_id
, u8 type
, int data
)
371 struct acpi_bus_event
*event
;
372 unsigned long flags
= 0;
374 /* drop event on the floor if no one's listening */
378 event
= kzalloc(sizeof(struct acpi_bus_event
), GFP_ATOMIC
);
382 strcpy(event
->device_class
, device_class
);
383 strcpy(event
->bus_id
, bus_id
);
387 spin_lock_irqsave(&acpi_bus_event_lock
, flags
);
388 list_add_tail(&event
->node
, &acpi_bus_event_list
);
389 spin_unlock_irqrestore(&acpi_bus_event_lock
, flags
);
391 wake_up_interruptible(&acpi_bus_event_queue
);
397 EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4
);
399 int acpi_bus_generate_proc_event(struct acpi_device
*device
, u8 type
, int data
)
403 return acpi_bus_generate_proc_event4(device
->pnp
.device_class
,
404 device
->pnp
.bus_id
, type
, data
);
407 EXPORT_SYMBOL(acpi_bus_generate_proc_event
);
409 int acpi_bus_receive_event(struct acpi_bus_event
*event
)
411 unsigned long flags
= 0;
412 struct acpi_bus_event
*entry
= NULL
;
414 DECLARE_WAITQUEUE(wait
, current
);
420 if (list_empty(&acpi_bus_event_list
)) {
422 set_current_state(TASK_INTERRUPTIBLE
);
423 add_wait_queue(&acpi_bus_event_queue
, &wait
);
425 if (list_empty(&acpi_bus_event_list
))
428 remove_wait_queue(&acpi_bus_event_queue
, &wait
);
429 set_current_state(TASK_RUNNING
);
431 if (signal_pending(current
))
435 spin_lock_irqsave(&acpi_bus_event_lock
, flags
);
436 if (!list_empty(&acpi_bus_event_list
)) {
437 entry
= list_entry(acpi_bus_event_list
.next
,
438 struct acpi_bus_event
, node
);
439 list_del(&entry
->node
);
441 spin_unlock_irqrestore(&acpi_bus_event_lock
, flags
);
446 memcpy(event
, entry
, sizeof(struct acpi_bus_event
));
453 #endif /* CONFIG_ACPI_PROC_EVENT */
455 /* --------------------------------------------------------------------------
456 Notification Handling
457 -------------------------------------------------------------------------- */
459 static void acpi_bus_check_device(acpi_handle handle
)
461 struct acpi_device
*device
;
463 struct acpi_device_status old_status
;
465 if (acpi_bus_get_device(handle
, &device
))
470 old_status
= device
->status
;
473 * Make sure this device's parent is present before we go about
474 * messing with the device.
476 if (device
->parent
&& !device
->parent
->status
.present
) {
477 device
->status
= device
->parent
->status
;
481 status
= acpi_bus_get_status(device
);
482 if (ACPI_FAILURE(status
))
485 if (STRUCT_TO_INT(old_status
) == STRUCT_TO_INT(device
->status
))
489 * Device Insertion/Removal
491 if ((device
->status
.present
) && !(old_status
.present
)) {
492 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Device insertion detected\n"));
493 /* TBD: Handle device insertion */
494 } else if (!(device
->status
.present
) && (old_status
.present
)) {
495 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Device removal detected\n"));
496 /* TBD: Handle device removal */
500 static void acpi_bus_check_scope(acpi_handle handle
)
503 acpi_bus_check_device(handle
);
506 * TBD: Enumerate child devices within this device's scope and
507 * run acpi_bus_check_device()'s on them.
511 static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list
);
512 int register_acpi_bus_notifier(struct notifier_block
*nb
)
514 return blocking_notifier_chain_register(&acpi_bus_notify_list
, nb
);
516 EXPORT_SYMBOL_GPL(register_acpi_bus_notifier
);
518 void unregister_acpi_bus_notifier(struct notifier_block
*nb
)
520 blocking_notifier_chain_unregister(&acpi_bus_notify_list
, nb
);
522 EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier
);
527 * Callback for all 'system-level' device notifications (values 0x00-0x7F).
529 static void acpi_bus_notify(acpi_handle handle
, u32 type
, void *data
)
531 struct acpi_device
*device
= NULL
;
532 struct acpi_driver
*driver
;
534 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Notification %#02x to handle %p\n",
537 blocking_notifier_call_chain(&acpi_bus_notify_list
,
538 type
, (void *)handle
);
542 case ACPI_NOTIFY_BUS_CHECK
:
543 acpi_bus_check_scope(handle
);
545 * TBD: We'll need to outsource certain events to non-ACPI
546 * drivers via the device manager (device.c).
550 case ACPI_NOTIFY_DEVICE_CHECK
:
551 acpi_bus_check_device(handle
);
553 * TBD: We'll need to outsource certain events to non-ACPI
554 * drivers via the device manager (device.c).
558 case ACPI_NOTIFY_DEVICE_WAKE
:
562 case ACPI_NOTIFY_EJECT_REQUEST
:
566 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT
:
567 /* TBD: Exactly what does 'light' mean? */
570 case ACPI_NOTIFY_FREQUENCY_MISMATCH
:
574 case ACPI_NOTIFY_BUS_MODE_MISMATCH
:
578 case ACPI_NOTIFY_POWER_FAULT
:
583 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
584 "Received unknown/unsupported notification [%08x]\n",
589 acpi_bus_get_device(handle
, &device
);
591 driver
= device
->driver
;
592 if (driver
&& driver
->ops
.notify
&&
593 (driver
->flags
& ACPI_DRIVER_ALL_NOTIFY_EVENTS
))
594 driver
->ops
.notify(device
, type
);
598 /* --------------------------------------------------------------------------
599 Initialization/Cleanup
600 -------------------------------------------------------------------------- */
602 static int __init
acpi_bus_init_irq(void)
604 acpi_status status
= AE_OK
;
605 union acpi_object arg
= { ACPI_TYPE_INTEGER
};
606 struct acpi_object_list arg_list
= { 1, &arg
};
607 char *message
= NULL
;
611 * Let the system know what interrupt model we are using by
612 * evaluating the \_PIC object, if exists.
615 switch (acpi_irq_model
) {
616 case ACPI_IRQ_MODEL_PIC
:
619 case ACPI_IRQ_MODEL_IOAPIC
:
622 case ACPI_IRQ_MODEL_IOSAPIC
:
625 case ACPI_IRQ_MODEL_PLATFORM
:
626 message
= "platform specific model";
629 printk(KERN_WARNING PREFIX
"Unknown interrupt routing model\n");
633 printk(KERN_INFO PREFIX
"Using %s for interrupt routing\n", message
);
635 arg
.integer
.value
= acpi_irq_model
;
637 status
= acpi_evaluate_object(NULL
, "\\_PIC", &arg_list
, NULL
);
638 if (ACPI_FAILURE(status
) && (status
!= AE_NOT_FOUND
)) {
639 ACPI_EXCEPTION((AE_INFO
, status
, "Evaluating _PIC"));
646 u8 acpi_gbl_permanent_mmap
;
649 void __init
acpi_early_init(void)
651 acpi_status status
= AE_OK
;
656 printk(KERN_INFO PREFIX
"Core revision %08x\n", ACPI_CA_VERSION
);
658 /* enable workarounds, unless strict ACPI spec. compliance */
660 acpi_gbl_enable_interpreter_slack
= TRUE
;
662 acpi_gbl_permanent_mmap
= 1;
665 * If the machine falls into the DMI check table,
666 * DSDT will be copied to memory
668 dmi_check_system(dsdt_dmi_table
);
670 status
= acpi_reallocate_root_table();
671 if (ACPI_FAILURE(status
)) {
672 printk(KERN_ERR PREFIX
673 "Unable to reallocate ACPI tables\n");
677 status
= acpi_initialize_subsystem();
678 if (ACPI_FAILURE(status
)) {
679 printk(KERN_ERR PREFIX
680 "Unable to initialize the ACPI Interpreter\n");
684 status
= acpi_load_tables();
685 if (ACPI_FAILURE(status
)) {
686 printk(KERN_ERR PREFIX
687 "Unable to load the System Description Tables\n");
693 /* compatible (0) means level (3) */
694 if (!(acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
)) {
695 acpi_sci_flags
&= ~ACPI_MADT_TRIGGER_MASK
;
696 acpi_sci_flags
|= ACPI_MADT_TRIGGER_LEVEL
;
698 /* Set PIC-mode SCI trigger type */
699 acpi_pic_sci_set_trigger(acpi_gbl_FADT
.sci_interrupt
,
700 (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2);
703 * now that acpi_gbl_FADT is initialized,
704 * update it with result from INT_SRC_OVR parsing
706 acpi_gbl_FADT
.sci_interrupt
= acpi_sci_override_gsi
;
710 status
= acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE
);
711 if (ACPI_FAILURE(status
)) {
712 printk(KERN_ERR PREFIX
"Unable to enable ACPI\n");
717 * If the system is using ACPI then we can be reasonably
718 * confident that any regulators are managed by the firmware
719 * so tell the regulator core it has everything it needs to
722 regulator_has_full_constraints();
731 static int __init
acpi_bus_init(void)
734 acpi_status status
= AE_OK
;
735 extern acpi_status
acpi_os_initialize1(void);
737 acpi_os_initialize1();
739 status
= acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE
);
740 if (ACPI_FAILURE(status
)) {
741 printk(KERN_ERR PREFIX
742 "Unable to start the ACPI Interpreter\n");
747 * ACPI 2.0 requires the EC driver to be loaded and work before
748 * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
751 * This is accomplished by looking for the ECDT table, and getting
752 * the EC parameters out of that.
754 status
= acpi_ec_ecdt_probe();
755 /* Ignore result. Not having an ECDT is not fatal. */
757 status
= acpi_initialize_objects(ACPI_FULL_INITIALIZATION
);
758 if (ACPI_FAILURE(status
)) {
759 printk(KERN_ERR PREFIX
"Unable to initialize ACPI objects\n");
764 * _OSC method may exist in module level code,
765 * so it must be run after ACPI_FULL_INITIALIZATION
767 acpi_bus_osc_support();
770 * _PDC control method may load dynamic SSDT tables,
771 * and we need to install the table handler before that.
775 acpi_early_processor_set_pdc();
778 * Maybe EC region is required at bus_scan/acpi_get_devices. So it
779 * is necessary to enable it as early as possible.
781 acpi_boot_ec_enable();
783 printk(KERN_INFO PREFIX
"Interpreter enabled\n");
785 /* Initialize sleep structures */
789 * Get the system interrupt model and evaluate \_PIC.
791 result
= acpi_bus_init_irq();
796 * Register the for all standard device notifications.
799 acpi_install_notify_handler(ACPI_ROOT_OBJECT
, ACPI_SYSTEM_NOTIFY
,
800 &acpi_bus_notify
, NULL
);
801 if (ACPI_FAILURE(status
)) {
802 printk(KERN_ERR PREFIX
803 "Unable to register for device notifications\n");
808 * Create the top ACPI proc directory
810 acpi_root_dir
= proc_mkdir(ACPI_BUS_FILE_ROOT
, NULL
);
814 /* Mimic structured exception handling */
820 struct kobject
*acpi_kobj
;
821 EXPORT_SYMBOL_GPL(acpi_kobj
);
823 static int __init
acpi_init(void)
828 printk(KERN_INFO PREFIX
"Interpreter disabled.\n");
832 acpi_kobj
= kobject_create_and_add("acpi", firmware_kobj
);
834 printk(KERN_WARNING
"%s: kset create error\n", __func__
);
838 init_acpi_device_notify();
839 result
= acpi_bus_init();
845 pci_mmcfg_late_init();
849 acpi_sleep_proc_init();
850 acpi_wakeup_device_init();
854 subsys_initcall(acpi_init
);