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 /* --------------------------------------------------------------------------
183 -------------------------------------------------------------------------- */
185 static const char *state_string(int state
)
194 case ACPI_STATE_D3_HOT
:
196 case ACPI_STATE_D3_COLD
:
203 static int __acpi_bus_get_power(struct acpi_device
*device
, int *state
)
205 int result
= ACPI_STATE_UNKNOWN
;
207 if (!device
|| !state
)
210 if (!device
->flags
.power_manageable
) {
211 /* TBD: Non-recursive algorithm for walking up hierarchy. */
212 *state
= device
->parent
?
213 device
->parent
->power
.state
: ACPI_STATE_D0
;
218 * Get the device's power state either directly (via _PSC) or
219 * indirectly (via power resources).
221 if (device
->power
.flags
.explicit_get
) {
222 unsigned long long psc
;
223 acpi_status status
= acpi_evaluate_integer(device
->handle
,
225 if (ACPI_FAILURE(status
))
230 /* The test below covers ACPI_STATE_UNKNOWN too. */
231 if (result
<= ACPI_STATE_D2
) {
233 } else if (device
->power
.flags
.power_resources
) {
234 int error
= acpi_power_get_inferred_state(device
, &result
);
237 } else if (result
== ACPI_STATE_D3_HOT
) {
238 result
= ACPI_STATE_D3
;
243 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Device [%s] power state is %s\n",
244 device
->pnp
.bus_id
, state_string(*state
)));
250 static int __acpi_bus_set_power(struct acpi_device
*device
, int state
)
253 acpi_status status
= AE_OK
;
254 char object_name
[5] = { '_', 'P', 'S', '0' + state
, '\0' };
256 if (!device
|| (state
< ACPI_STATE_D0
) || (state
> ACPI_STATE_D3_COLD
))
259 /* Make sure this is a valid target state */
261 if (state
== device
->power
.state
) {
262 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Device is already at %s\n",
263 state_string(state
)));
267 if (!device
->power
.states
[state
].flags
.valid
) {
268 printk(KERN_WARNING PREFIX
"Device does not support %s\n",
269 state_string(state
));
272 if (device
->parent
&& (state
< device
->parent
->power
.state
)) {
273 printk(KERN_WARNING PREFIX
274 "Cannot set device to a higher-powered"
275 " state than parent\n");
279 /* For D3cold we should execute _PS3, not _PS4. */
280 if (state
== ACPI_STATE_D3_COLD
)
281 object_name
[3] = '3';
286 * On transitions to a high-powered state we first apply power (via
287 * power resources) then evalute _PSx. Conversly for transitions to
288 * a lower-powered state.
290 if (state
< device
->power
.state
) {
291 if (device
->power
.flags
.power_resources
) {
292 result
= acpi_power_transition(device
, state
);
296 if (device
->power
.states
[state
].flags
.explicit_set
) {
297 status
= acpi_evaluate_object(device
->handle
,
298 object_name
, NULL
, NULL
);
299 if (ACPI_FAILURE(status
)) {
305 if (device
->power
.states
[state
].flags
.explicit_set
) {
306 status
= acpi_evaluate_object(device
->handle
,
307 object_name
, NULL
, NULL
);
308 if (ACPI_FAILURE(status
)) {
313 if (device
->power
.flags
.power_resources
) {
314 result
= acpi_power_transition(device
, state
);
322 printk(KERN_WARNING PREFIX
323 "Device [%s] failed to transition to %s\n",
324 device
->pnp
.bus_id
, state_string(state
));
326 device
->power
.state
= state
;
327 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
328 "Device [%s] transitioned to %s\n",
329 device
->pnp
.bus_id
, state_string(state
)));
336 int acpi_bus_set_power(acpi_handle handle
, int state
)
338 struct acpi_device
*device
;
341 result
= acpi_bus_get_device(handle
, &device
);
345 if (!device
->flags
.power_manageable
) {
346 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
347 "Device [%s] is not power manageable\n",
348 dev_name(&device
->dev
)));
352 return __acpi_bus_set_power(device
, state
);
354 EXPORT_SYMBOL(acpi_bus_set_power
);
357 int acpi_bus_init_power(struct acpi_device
*device
)
365 device
->power
.state
= ACPI_STATE_UNKNOWN
;
367 result
= __acpi_bus_get_power(device
, &state
);
371 if (device
->power
.flags
.power_resources
)
372 result
= acpi_power_on_resources(device
, state
);
375 device
->power
.state
= state
;
381 int acpi_bus_update_power(acpi_handle handle
, int *state_p
)
383 struct acpi_device
*device
;
387 result
= acpi_bus_get_device(handle
, &device
);
391 result
= __acpi_bus_get_power(device
, &state
);
395 result
= __acpi_bus_set_power(device
, state
);
396 if (!result
&& state_p
)
401 EXPORT_SYMBOL_GPL(acpi_bus_update_power
);
404 bool acpi_bus_power_manageable(acpi_handle handle
)
406 struct acpi_device
*device
;
409 result
= acpi_bus_get_device(handle
, &device
);
410 return result
? false : device
->flags
.power_manageable
;
413 EXPORT_SYMBOL(acpi_bus_power_manageable
);
415 bool acpi_bus_can_wakeup(acpi_handle handle
)
417 struct acpi_device
*device
;
420 result
= acpi_bus_get_device(handle
, &device
);
421 return result
? false : device
->wakeup
.flags
.valid
;
424 EXPORT_SYMBOL(acpi_bus_can_wakeup
);
426 static void acpi_print_osc_error(acpi_handle handle
,
427 struct acpi_osc_context
*context
, char *error
)
429 struct acpi_buffer buffer
= {ACPI_ALLOCATE_BUFFER
};
432 if (ACPI_FAILURE(acpi_get_name(handle
, ACPI_FULL_PATHNAME
, &buffer
)))
433 printk(KERN_DEBUG
"%s\n", error
);
435 printk(KERN_DEBUG
"%s:%s\n", (char *)buffer
.pointer
, error
);
436 kfree(buffer
.pointer
);
438 printk(KERN_DEBUG
"_OSC request data:");
439 for (i
= 0; i
< context
->cap
.length
; i
+= sizeof(u32
))
440 printk("%x ", *((u32
*)(context
->cap
.pointer
+ i
)));
444 static acpi_status
acpi_str_to_uuid(char *str
, u8
*uuid
)
447 static int opc_map_to_uuid
[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
448 24, 26, 28, 30, 32, 34};
450 if (strlen(str
) != 36)
451 return AE_BAD_PARAMETER
;
452 for (i
= 0; i
< 36; i
++) {
453 if (i
== 8 || i
== 13 || i
== 18 || i
== 23) {
455 return AE_BAD_PARAMETER
;
456 } else if (!isxdigit(str
[i
]))
457 return AE_BAD_PARAMETER
;
459 for (i
= 0; i
< 16; i
++) {
460 uuid
[i
] = hex_to_bin(str
[opc_map_to_uuid
[i
]]) << 4;
461 uuid
[i
] |= hex_to_bin(str
[opc_map_to_uuid
[i
] + 1]);
466 acpi_status
acpi_run_osc(acpi_handle handle
, struct acpi_osc_context
*context
)
469 struct acpi_object_list input
;
470 union acpi_object in_params
[4];
471 union acpi_object
*out_obj
;
474 struct acpi_buffer output
= {ACPI_ALLOCATE_BUFFER
, NULL
};
478 if (ACPI_FAILURE(acpi_str_to_uuid(context
->uuid_str
, uuid
)))
480 context
->ret
.length
= ACPI_ALLOCATE_BUFFER
;
481 context
->ret
.pointer
= NULL
;
483 /* Setting up input parameters */
485 input
.pointer
= in_params
;
486 in_params
[0].type
= ACPI_TYPE_BUFFER
;
487 in_params
[0].buffer
.length
= 16;
488 in_params
[0].buffer
.pointer
= uuid
;
489 in_params
[1].type
= ACPI_TYPE_INTEGER
;
490 in_params
[1].integer
.value
= context
->rev
;
491 in_params
[2].type
= ACPI_TYPE_INTEGER
;
492 in_params
[2].integer
.value
= context
->cap
.length
/sizeof(u32
);
493 in_params
[3].type
= ACPI_TYPE_BUFFER
;
494 in_params
[3].buffer
.length
= context
->cap
.length
;
495 in_params
[3].buffer
.pointer
= context
->cap
.pointer
;
497 status
= acpi_evaluate_object(handle
, "_OSC", &input
, &output
);
498 if (ACPI_FAILURE(status
))
502 return AE_NULL_OBJECT
;
504 out_obj
= output
.pointer
;
505 if (out_obj
->type
!= ACPI_TYPE_BUFFER
506 || out_obj
->buffer
.length
!= context
->cap
.length
) {
507 acpi_print_osc_error(handle
, context
,
508 "_OSC evaluation returned wrong type");
512 /* Need to ignore the bit0 in result code */
513 errors
= *((u32
*)out_obj
->buffer
.pointer
) & ~(1 << 0);
515 if (errors
& OSC_REQUEST_ERROR
)
516 acpi_print_osc_error(handle
, context
,
517 "_OSC request failed");
518 if (errors
& OSC_INVALID_UUID_ERROR
)
519 acpi_print_osc_error(handle
, context
,
520 "_OSC invalid UUID");
521 if (errors
& OSC_INVALID_REVISION_ERROR
)
522 acpi_print_osc_error(handle
, context
,
523 "_OSC invalid revision");
524 if (errors
& OSC_CAPABILITIES_MASK_ERROR
) {
525 if (((u32
*)context
->cap
.pointer
)[OSC_QUERY_TYPE
]
535 context
->ret
.length
= out_obj
->buffer
.length
;
536 context
->ret
.pointer
= kmalloc(context
->ret
.length
, GFP_KERNEL
);
537 if (!context
->ret
.pointer
) {
538 status
= AE_NO_MEMORY
;
541 memcpy(context
->ret
.pointer
, out_obj
->buffer
.pointer
,
542 context
->ret
.length
);
546 kfree(output
.pointer
);
548 context
->ret
.pointer
= NULL
;
551 EXPORT_SYMBOL(acpi_run_osc
);
553 bool osc_sb_apei_support_acked
;
554 static u8 sb_uuid_str
[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
555 static void acpi_bus_osc_support(void)
558 struct acpi_osc_context context
= {
559 .uuid_str
= sb_uuid_str
,
562 .cap
.pointer
= capbuf
,
566 capbuf
[OSC_QUERY_TYPE
] = OSC_QUERY_ENABLE
;
567 capbuf
[OSC_SUPPORT_TYPE
] = OSC_SB_PR3_SUPPORT
; /* _PR3 is in use */
568 #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
569 defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
570 capbuf
[OSC_SUPPORT_TYPE
] |= OSC_SB_PAD_SUPPORT
;
573 #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
574 capbuf
[OSC_SUPPORT_TYPE
] |= OSC_SB_PPC_OST_SUPPORT
;
577 #ifdef ACPI_HOTPLUG_OST
578 capbuf
[OSC_SUPPORT_TYPE
] |= OSC_SB_HOTPLUG_OST_SUPPORT
;
582 capbuf
[OSC_SUPPORT_TYPE
] |= OSC_SB_APEI_SUPPORT
;
583 if (ACPI_FAILURE(acpi_get_handle(NULL
, "\\_SB", &handle
)))
585 if (ACPI_SUCCESS(acpi_run_osc(handle
, &context
))) {
586 u32
*capbuf_ret
= context
.ret
.pointer
;
587 if (context
.ret
.length
> OSC_SUPPORT_TYPE
)
588 osc_sb_apei_support_acked
=
589 capbuf_ret
[OSC_SUPPORT_TYPE
] & OSC_SB_APEI_SUPPORT
;
590 kfree(context
.ret
.pointer
);
592 /* do we need to check other returned cap? Sounds no */
595 /* --------------------------------------------------------------------------
597 -------------------------------------------------------------------------- */
599 #ifdef CONFIG_ACPI_PROC_EVENT
600 static DEFINE_SPINLOCK(acpi_bus_event_lock
);
602 LIST_HEAD(acpi_bus_event_list
);
603 DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue
);
605 extern int event_is_open
;
607 int acpi_bus_generate_proc_event4(const char *device_class
, const char *bus_id
, u8 type
, int data
)
609 struct acpi_bus_event
*event
;
610 unsigned long flags
= 0;
612 /* drop event on the floor if no one's listening */
616 event
= kzalloc(sizeof(struct acpi_bus_event
), GFP_ATOMIC
);
620 strcpy(event
->device_class
, device_class
);
621 strcpy(event
->bus_id
, bus_id
);
625 spin_lock_irqsave(&acpi_bus_event_lock
, flags
);
626 list_add_tail(&event
->node
, &acpi_bus_event_list
);
627 spin_unlock_irqrestore(&acpi_bus_event_lock
, flags
);
629 wake_up_interruptible(&acpi_bus_event_queue
);
635 EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4
);
637 int acpi_bus_generate_proc_event(struct acpi_device
*device
, u8 type
, int data
)
641 return acpi_bus_generate_proc_event4(device
->pnp
.device_class
,
642 device
->pnp
.bus_id
, type
, data
);
645 EXPORT_SYMBOL(acpi_bus_generate_proc_event
);
647 int acpi_bus_receive_event(struct acpi_bus_event
*event
)
649 unsigned long flags
= 0;
650 struct acpi_bus_event
*entry
= NULL
;
652 DECLARE_WAITQUEUE(wait
, current
);
658 if (list_empty(&acpi_bus_event_list
)) {
660 set_current_state(TASK_INTERRUPTIBLE
);
661 add_wait_queue(&acpi_bus_event_queue
, &wait
);
663 if (list_empty(&acpi_bus_event_list
))
666 remove_wait_queue(&acpi_bus_event_queue
, &wait
);
667 set_current_state(TASK_RUNNING
);
669 if (signal_pending(current
))
673 spin_lock_irqsave(&acpi_bus_event_lock
, flags
);
674 if (!list_empty(&acpi_bus_event_list
)) {
675 entry
= list_entry(acpi_bus_event_list
.next
,
676 struct acpi_bus_event
, node
);
677 list_del(&entry
->node
);
679 spin_unlock_irqrestore(&acpi_bus_event_lock
, flags
);
684 memcpy(event
, entry
, sizeof(struct acpi_bus_event
));
691 #endif /* CONFIG_ACPI_PROC_EVENT */
693 /* --------------------------------------------------------------------------
694 Notification Handling
695 -------------------------------------------------------------------------- */
697 static void acpi_bus_check_device(acpi_handle handle
)
699 struct acpi_device
*device
;
701 struct acpi_device_status old_status
;
703 if (acpi_bus_get_device(handle
, &device
))
708 old_status
= device
->status
;
711 * Make sure this device's parent is present before we go about
712 * messing with the device.
714 if (device
->parent
&& !device
->parent
->status
.present
) {
715 device
->status
= device
->parent
->status
;
719 status
= acpi_bus_get_status(device
);
720 if (ACPI_FAILURE(status
))
723 if (STRUCT_TO_INT(old_status
) == STRUCT_TO_INT(device
->status
))
727 * Device Insertion/Removal
729 if ((device
->status
.present
) && !(old_status
.present
)) {
730 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Device insertion detected\n"));
731 /* TBD: Handle device insertion */
732 } else if (!(device
->status
.present
) && (old_status
.present
)) {
733 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Device removal detected\n"));
734 /* TBD: Handle device removal */
738 static void acpi_bus_check_scope(acpi_handle handle
)
741 acpi_bus_check_device(handle
);
744 * TBD: Enumerate child devices within this device's scope and
745 * run acpi_bus_check_device()'s on them.
749 static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list
);
750 int register_acpi_bus_notifier(struct notifier_block
*nb
)
752 return blocking_notifier_chain_register(&acpi_bus_notify_list
, nb
);
754 EXPORT_SYMBOL_GPL(register_acpi_bus_notifier
);
756 void unregister_acpi_bus_notifier(struct notifier_block
*nb
)
758 blocking_notifier_chain_unregister(&acpi_bus_notify_list
, nb
);
760 EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier
);
765 * Callback for all 'system-level' device notifications (values 0x00-0x7F).
767 static void acpi_bus_notify(acpi_handle handle
, u32 type
, void *data
)
769 struct acpi_device
*device
= NULL
;
770 struct acpi_driver
*driver
;
772 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Notification %#02x to handle %p\n",
775 blocking_notifier_call_chain(&acpi_bus_notify_list
,
776 type
, (void *)handle
);
780 case ACPI_NOTIFY_BUS_CHECK
:
781 acpi_bus_check_scope(handle
);
783 * TBD: We'll need to outsource certain events to non-ACPI
784 * drivers via the device manager (device.c).
788 case ACPI_NOTIFY_DEVICE_CHECK
:
789 acpi_bus_check_device(handle
);
791 * TBD: We'll need to outsource certain events to non-ACPI
792 * drivers via the device manager (device.c).
796 case ACPI_NOTIFY_DEVICE_WAKE
:
800 case ACPI_NOTIFY_EJECT_REQUEST
:
804 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT
:
805 /* TBD: Exactly what does 'light' mean? */
808 case ACPI_NOTIFY_FREQUENCY_MISMATCH
:
812 case ACPI_NOTIFY_BUS_MODE_MISMATCH
:
816 case ACPI_NOTIFY_POWER_FAULT
:
821 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
822 "Received unknown/unsupported notification [%08x]\n",
827 acpi_bus_get_device(handle
, &device
);
829 driver
= device
->driver
;
830 if (driver
&& driver
->ops
.notify
&&
831 (driver
->flags
& ACPI_DRIVER_ALL_NOTIFY_EVENTS
))
832 driver
->ops
.notify(device
, type
);
836 /* --------------------------------------------------------------------------
837 Initialization/Cleanup
838 -------------------------------------------------------------------------- */
840 static int __init
acpi_bus_init_irq(void)
842 acpi_status status
= AE_OK
;
843 union acpi_object arg
= { ACPI_TYPE_INTEGER
};
844 struct acpi_object_list arg_list
= { 1, &arg
};
845 char *message
= NULL
;
849 * Let the system know what interrupt model we are using by
850 * evaluating the \_PIC object, if exists.
853 switch (acpi_irq_model
) {
854 case ACPI_IRQ_MODEL_PIC
:
857 case ACPI_IRQ_MODEL_IOAPIC
:
860 case ACPI_IRQ_MODEL_IOSAPIC
:
863 case ACPI_IRQ_MODEL_PLATFORM
:
864 message
= "platform specific model";
867 printk(KERN_WARNING PREFIX
"Unknown interrupt routing model\n");
871 printk(KERN_INFO PREFIX
"Using %s for interrupt routing\n", message
);
873 arg
.integer
.value
= acpi_irq_model
;
875 status
= acpi_evaluate_object(NULL
, "\\_PIC", &arg_list
, NULL
);
876 if (ACPI_FAILURE(status
) && (status
!= AE_NOT_FOUND
)) {
877 ACPI_EXCEPTION((AE_INFO
, status
, "Evaluating _PIC"));
884 u8 acpi_gbl_permanent_mmap
;
887 void __init
acpi_early_init(void)
889 acpi_status status
= AE_OK
;
894 printk(KERN_INFO PREFIX
"Core revision %08x\n", ACPI_CA_VERSION
);
896 /* enable workarounds, unless strict ACPI spec. compliance */
898 acpi_gbl_enable_interpreter_slack
= TRUE
;
900 acpi_gbl_permanent_mmap
= 1;
903 * If the machine falls into the DMI check table,
904 * DSDT will be copied to memory
906 dmi_check_system(dsdt_dmi_table
);
908 status
= acpi_reallocate_root_table();
909 if (ACPI_FAILURE(status
)) {
910 printk(KERN_ERR PREFIX
911 "Unable to reallocate ACPI tables\n");
915 status
= acpi_initialize_subsystem();
916 if (ACPI_FAILURE(status
)) {
917 printk(KERN_ERR PREFIX
918 "Unable to initialize the ACPI Interpreter\n");
922 status
= acpi_load_tables();
923 if (ACPI_FAILURE(status
)) {
924 printk(KERN_ERR PREFIX
925 "Unable to load the System Description Tables\n");
931 /* compatible (0) means level (3) */
932 if (!(acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
)) {
933 acpi_sci_flags
&= ~ACPI_MADT_TRIGGER_MASK
;
934 acpi_sci_flags
|= ACPI_MADT_TRIGGER_LEVEL
;
936 /* Set PIC-mode SCI trigger type */
937 acpi_pic_sci_set_trigger(acpi_gbl_FADT
.sci_interrupt
,
938 (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2);
941 * now that acpi_gbl_FADT is initialized,
942 * update it with result from INT_SRC_OVR parsing
944 acpi_gbl_FADT
.sci_interrupt
= acpi_sci_override_gsi
;
948 status
= acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE
);
949 if (ACPI_FAILURE(status
)) {
950 printk(KERN_ERR PREFIX
"Unable to enable ACPI\n");
961 static int __init
acpi_bus_init(void)
964 acpi_status status
= AE_OK
;
965 extern acpi_status
acpi_os_initialize1(void);
967 acpi_os_initialize1();
969 status
= acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE
);
970 if (ACPI_FAILURE(status
)) {
971 printk(KERN_ERR PREFIX
972 "Unable to start the ACPI Interpreter\n");
977 * ACPI 2.0 requires the EC driver to be loaded and work before
978 * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
981 * This is accomplished by looking for the ECDT table, and getting
982 * the EC parameters out of that.
984 status
= acpi_ec_ecdt_probe();
985 /* Ignore result. Not having an ECDT is not fatal. */
987 acpi_bus_osc_support();
989 status
= acpi_initialize_objects(ACPI_FULL_INITIALIZATION
);
990 if (ACPI_FAILURE(status
)) {
991 printk(KERN_ERR PREFIX
"Unable to initialize ACPI objects\n");
996 * _PDC control method may load dynamic SSDT tables,
997 * and we need to install the table handler before that.
1001 acpi_early_processor_set_pdc();
1004 * Maybe EC region is required at bus_scan/acpi_get_devices. So it
1005 * is necessary to enable it as early as possible.
1007 acpi_boot_ec_enable();
1009 printk(KERN_INFO PREFIX
"Interpreter enabled\n");
1011 /* Initialize sleep structures */
1015 * Get the system interrupt model and evaluate \_PIC.
1017 result
= acpi_bus_init_irq();
1022 * Register the for all standard device notifications.
1025 acpi_install_notify_handler(ACPI_ROOT_OBJECT
, ACPI_SYSTEM_NOTIFY
,
1026 &acpi_bus_notify
, NULL
);
1027 if (ACPI_FAILURE(status
)) {
1028 printk(KERN_ERR PREFIX
1029 "Unable to register for device notifications\n");
1034 * Create the top ACPI proc directory
1036 acpi_root_dir
= proc_mkdir(ACPI_BUS_FILE_ROOT
, NULL
);
1040 /* Mimic structured exception handling */
1046 struct kobject
*acpi_kobj
;
1047 EXPORT_SYMBOL_GPL(acpi_kobj
);
1049 static int __init
acpi_init(void)
1053 if (acpi_disabled
) {
1054 printk(KERN_INFO PREFIX
"Interpreter disabled.\n");
1058 acpi_kobj
= kobject_create_and_add("acpi", firmware_kobj
);
1060 printk(KERN_WARNING
"%s: kset create error\n", __func__
);
1064 init_acpi_device_notify();
1065 result
= acpi_bus_init();
1071 pci_mmcfg_late_init();
1074 acpi_debugfs_init();
1075 acpi_sleep_proc_init();
1076 acpi_wakeup_device_init();
1080 subsys_initcall(acpi_init
);