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 int __acpi_bus_get_power(struct acpi_device
*device
, int *state
)
188 acpi_status status
= 0;
189 unsigned long long psc
= 0;
191 if (!device
|| !state
)
194 *state
= ACPI_STATE_UNKNOWN
;
196 if (device
->flags
.power_manageable
) {
198 * Get the device's power state either directly (via _PSC) or
199 * indirectly (via power resources).
201 if (device
->power
.flags
.power_resources
) {
202 result
= acpi_power_get_inferred_state(device
, state
);
205 } else if (device
->power
.flags
.explicit_get
) {
206 status
= acpi_evaluate_integer(device
->handle
, "_PSC",
208 if (ACPI_FAILURE(status
))
213 /* TBD: Non-recursive algorithm for walking up hierarchy. */
214 *state
= device
->parent
?
215 device
->parent
->power
.state
: ACPI_STATE_D0
;
218 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Device [%s] power state is D%d\n",
219 device
->pnp
.bus_id
, *state
));
225 static int __acpi_bus_set_power(struct acpi_device
*device
, int state
)
228 acpi_status status
= AE_OK
;
229 char object_name
[5] = { '_', 'P', 'S', '0' + state
, '\0' };
231 if (!device
|| (state
< ACPI_STATE_D0
) || (state
> ACPI_STATE_D3_COLD
))
234 /* Make sure this is a valid target state */
236 if (state
== device
->power
.state
) {
237 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Device is already at D%d\n",
242 if (!device
->power
.states
[state
].flags
.valid
) {
243 printk(KERN_WARNING PREFIX
"Device does not support D%d\n", state
);
246 if (device
->parent
&& (state
< device
->parent
->power
.state
)) {
247 printk(KERN_WARNING PREFIX
248 "Cannot set device to a higher-powered"
249 " state than parent\n");
253 /* For D3cold we should execute _PS3, not _PS4. */
254 if (state
== ACPI_STATE_D3_COLD
)
255 object_name
[3] = '3';
260 * On transitions to a high-powered state we first apply power (via
261 * power resources) then evalute _PSx. Conversly for transitions to
262 * a lower-powered state.
264 if (state
< device
->power
.state
) {
265 if (device
->power
.flags
.power_resources
) {
266 result
= acpi_power_transition(device
, state
);
270 if (device
->power
.states
[state
].flags
.explicit_set
) {
271 status
= acpi_evaluate_object(device
->handle
,
272 object_name
, NULL
, NULL
);
273 if (ACPI_FAILURE(status
)) {
279 if (device
->power
.states
[state
].flags
.explicit_set
) {
280 status
= acpi_evaluate_object(device
->handle
,
281 object_name
, NULL
, NULL
);
282 if (ACPI_FAILURE(status
)) {
287 if (device
->power
.flags
.power_resources
) {
288 result
= acpi_power_transition(device
, state
);
296 printk(KERN_WARNING PREFIX
297 "Device [%s] failed to transition to D%d\n",
298 device
->pnp
.bus_id
, state
);
300 device
->power
.state
= state
;
301 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
302 "Device [%s] transitioned to D%d\n",
303 device
->pnp
.bus_id
, state
));
310 int acpi_bus_set_power(acpi_handle handle
, int state
)
312 struct acpi_device
*device
;
315 result
= acpi_bus_get_device(handle
, &device
);
319 if (!device
->flags
.power_manageable
) {
320 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
321 "Device [%s] is not power manageable\n",
322 dev_name(&device
->dev
)));
326 return __acpi_bus_set_power(device
, state
);
328 EXPORT_SYMBOL(acpi_bus_set_power
);
331 int acpi_bus_init_power(struct acpi_device
*device
)
339 device
->power
.state
= ACPI_STATE_UNKNOWN
;
341 result
= __acpi_bus_get_power(device
, &state
);
345 if (device
->power
.flags
.power_resources
)
346 result
= acpi_power_on_resources(device
, state
);
349 device
->power
.state
= state
;
355 int acpi_bus_update_power(acpi_handle handle
, int *state_p
)
357 struct acpi_device
*device
;
361 result
= acpi_bus_get_device(handle
, &device
);
365 result
= __acpi_bus_get_power(device
, &state
);
369 result
= __acpi_bus_set_power(device
, state
);
370 if (!result
&& state_p
)
375 EXPORT_SYMBOL_GPL(acpi_bus_update_power
);
378 bool acpi_bus_power_manageable(acpi_handle handle
)
380 struct acpi_device
*device
;
383 result
= acpi_bus_get_device(handle
, &device
);
384 return result
? false : device
->flags
.power_manageable
;
387 EXPORT_SYMBOL(acpi_bus_power_manageable
);
389 bool acpi_bus_can_wakeup(acpi_handle handle
)
391 struct acpi_device
*device
;
394 result
= acpi_bus_get_device(handle
, &device
);
395 return result
? false : device
->wakeup
.flags
.valid
;
398 EXPORT_SYMBOL(acpi_bus_can_wakeup
);
400 static void acpi_print_osc_error(acpi_handle handle
,
401 struct acpi_osc_context
*context
, char *error
)
403 struct acpi_buffer buffer
= {ACPI_ALLOCATE_BUFFER
};
406 if (ACPI_FAILURE(acpi_get_name(handle
, ACPI_FULL_PATHNAME
, &buffer
)))
407 printk(KERN_DEBUG
"%s\n", error
);
409 printk(KERN_DEBUG
"%s:%s\n", (char *)buffer
.pointer
, error
);
410 kfree(buffer
.pointer
);
412 printk(KERN_DEBUG
"_OSC request data:");
413 for (i
= 0; i
< context
->cap
.length
; i
+= sizeof(u32
))
414 printk("%x ", *((u32
*)(context
->cap
.pointer
+ i
)));
418 static acpi_status
acpi_str_to_uuid(char *str
, u8
*uuid
)
421 static int opc_map_to_uuid
[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
422 24, 26, 28, 30, 32, 34};
424 if (strlen(str
) != 36)
425 return AE_BAD_PARAMETER
;
426 for (i
= 0; i
< 36; i
++) {
427 if (i
== 8 || i
== 13 || i
== 18 || i
== 23) {
429 return AE_BAD_PARAMETER
;
430 } else if (!isxdigit(str
[i
]))
431 return AE_BAD_PARAMETER
;
433 for (i
= 0; i
< 16; i
++) {
434 uuid
[i
] = hex_to_bin(str
[opc_map_to_uuid
[i
]]) << 4;
435 uuid
[i
] |= hex_to_bin(str
[opc_map_to_uuid
[i
] + 1]);
440 acpi_status
acpi_run_osc(acpi_handle handle
, struct acpi_osc_context
*context
)
443 struct acpi_object_list input
;
444 union acpi_object in_params
[4];
445 union acpi_object
*out_obj
;
448 struct acpi_buffer output
= {ACPI_ALLOCATE_BUFFER
, NULL
};
452 if (ACPI_FAILURE(acpi_str_to_uuid(context
->uuid_str
, uuid
)))
454 context
->ret
.length
= ACPI_ALLOCATE_BUFFER
;
455 context
->ret
.pointer
= NULL
;
457 /* Setting up input parameters */
459 input
.pointer
= in_params
;
460 in_params
[0].type
= ACPI_TYPE_BUFFER
;
461 in_params
[0].buffer
.length
= 16;
462 in_params
[0].buffer
.pointer
= uuid
;
463 in_params
[1].type
= ACPI_TYPE_INTEGER
;
464 in_params
[1].integer
.value
= context
->rev
;
465 in_params
[2].type
= ACPI_TYPE_INTEGER
;
466 in_params
[2].integer
.value
= context
->cap
.length
/sizeof(u32
);
467 in_params
[3].type
= ACPI_TYPE_BUFFER
;
468 in_params
[3].buffer
.length
= context
->cap
.length
;
469 in_params
[3].buffer
.pointer
= context
->cap
.pointer
;
471 status
= acpi_evaluate_object(handle
, "_OSC", &input
, &output
);
472 if (ACPI_FAILURE(status
))
476 return AE_NULL_OBJECT
;
478 out_obj
= output
.pointer
;
479 if (out_obj
->type
!= ACPI_TYPE_BUFFER
480 || out_obj
->buffer
.length
!= context
->cap
.length
) {
481 acpi_print_osc_error(handle
, context
,
482 "_OSC evaluation returned wrong type");
486 /* Need to ignore the bit0 in result code */
487 errors
= *((u32
*)out_obj
->buffer
.pointer
) & ~(1 << 0);
489 if (errors
& OSC_REQUEST_ERROR
)
490 acpi_print_osc_error(handle
, context
,
491 "_OSC request failed");
492 if (errors
& OSC_INVALID_UUID_ERROR
)
493 acpi_print_osc_error(handle
, context
,
494 "_OSC invalid UUID");
495 if (errors
& OSC_INVALID_REVISION_ERROR
)
496 acpi_print_osc_error(handle
, context
,
497 "_OSC invalid revision");
498 if (errors
& OSC_CAPABILITIES_MASK_ERROR
) {
499 if (((u32
*)context
->cap
.pointer
)[OSC_QUERY_TYPE
]
509 context
->ret
.length
= out_obj
->buffer
.length
;
510 context
->ret
.pointer
= kmalloc(context
->ret
.length
, GFP_KERNEL
);
511 if (!context
->ret
.pointer
) {
512 status
= AE_NO_MEMORY
;
515 memcpy(context
->ret
.pointer
, out_obj
->buffer
.pointer
,
516 context
->ret
.length
);
520 kfree(output
.pointer
);
522 context
->ret
.pointer
= NULL
;
525 EXPORT_SYMBOL(acpi_run_osc
);
527 bool osc_sb_apei_support_acked
;
528 static u8 sb_uuid_str
[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
529 static void acpi_bus_osc_support(void)
532 struct acpi_osc_context context
= {
533 .uuid_str
= sb_uuid_str
,
536 .cap
.pointer
= capbuf
,
540 capbuf
[OSC_QUERY_TYPE
] = OSC_QUERY_ENABLE
;
541 capbuf
[OSC_SUPPORT_TYPE
] = OSC_SB_PR3_SUPPORT
; /* _PR3 is in use */
542 #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
543 defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
544 capbuf
[OSC_SUPPORT_TYPE
] |= OSC_SB_PAD_SUPPORT
;
547 #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
548 capbuf
[OSC_SUPPORT_TYPE
] |= OSC_SB_PPC_OST_SUPPORT
;
552 capbuf
[OSC_SUPPORT_TYPE
] |= OSC_SB_APEI_SUPPORT
;
553 if (ACPI_FAILURE(acpi_get_handle(NULL
, "\\_SB", &handle
)))
555 if (ACPI_SUCCESS(acpi_run_osc(handle
, &context
))) {
556 u32
*capbuf_ret
= context
.ret
.pointer
;
557 if (context
.ret
.length
> OSC_SUPPORT_TYPE
)
558 osc_sb_apei_support_acked
=
559 capbuf_ret
[OSC_SUPPORT_TYPE
] & OSC_SB_APEI_SUPPORT
;
560 kfree(context
.ret
.pointer
);
562 /* do we need to check other returned cap? Sounds no */
565 /* --------------------------------------------------------------------------
567 -------------------------------------------------------------------------- */
569 #ifdef CONFIG_ACPI_PROC_EVENT
570 static DEFINE_SPINLOCK(acpi_bus_event_lock
);
572 LIST_HEAD(acpi_bus_event_list
);
573 DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue
);
575 extern int event_is_open
;
577 int acpi_bus_generate_proc_event4(const char *device_class
, const char *bus_id
, u8 type
, int data
)
579 struct acpi_bus_event
*event
;
580 unsigned long flags
= 0;
582 /* drop event on the floor if no one's listening */
586 event
= kzalloc(sizeof(struct acpi_bus_event
), GFP_ATOMIC
);
590 strcpy(event
->device_class
, device_class
);
591 strcpy(event
->bus_id
, bus_id
);
595 spin_lock_irqsave(&acpi_bus_event_lock
, flags
);
596 list_add_tail(&event
->node
, &acpi_bus_event_list
);
597 spin_unlock_irqrestore(&acpi_bus_event_lock
, flags
);
599 wake_up_interruptible(&acpi_bus_event_queue
);
605 EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4
);
607 int acpi_bus_generate_proc_event(struct acpi_device
*device
, u8 type
, int data
)
611 return acpi_bus_generate_proc_event4(device
->pnp
.device_class
,
612 device
->pnp
.bus_id
, type
, data
);
615 EXPORT_SYMBOL(acpi_bus_generate_proc_event
);
617 int acpi_bus_receive_event(struct acpi_bus_event
*event
)
619 unsigned long flags
= 0;
620 struct acpi_bus_event
*entry
= NULL
;
622 DECLARE_WAITQUEUE(wait
, current
);
628 if (list_empty(&acpi_bus_event_list
)) {
630 set_current_state(TASK_INTERRUPTIBLE
);
631 add_wait_queue(&acpi_bus_event_queue
, &wait
);
633 if (list_empty(&acpi_bus_event_list
))
636 remove_wait_queue(&acpi_bus_event_queue
, &wait
);
637 set_current_state(TASK_RUNNING
);
639 if (signal_pending(current
))
643 spin_lock_irqsave(&acpi_bus_event_lock
, flags
);
644 if (!list_empty(&acpi_bus_event_list
)) {
645 entry
= list_entry(acpi_bus_event_list
.next
,
646 struct acpi_bus_event
, node
);
647 list_del(&entry
->node
);
649 spin_unlock_irqrestore(&acpi_bus_event_lock
, flags
);
654 memcpy(event
, entry
, sizeof(struct acpi_bus_event
));
661 #endif /* CONFIG_ACPI_PROC_EVENT */
663 /* --------------------------------------------------------------------------
664 Notification Handling
665 -------------------------------------------------------------------------- */
667 static void acpi_bus_check_device(acpi_handle handle
)
669 struct acpi_device
*device
;
671 struct acpi_device_status old_status
;
673 if (acpi_bus_get_device(handle
, &device
))
678 old_status
= device
->status
;
681 * Make sure this device's parent is present before we go about
682 * messing with the device.
684 if (device
->parent
&& !device
->parent
->status
.present
) {
685 device
->status
= device
->parent
->status
;
689 status
= acpi_bus_get_status(device
);
690 if (ACPI_FAILURE(status
))
693 if (STRUCT_TO_INT(old_status
) == STRUCT_TO_INT(device
->status
))
697 * Device Insertion/Removal
699 if ((device
->status
.present
) && !(old_status
.present
)) {
700 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Device insertion detected\n"));
701 /* TBD: Handle device insertion */
702 } else if (!(device
->status
.present
) && (old_status
.present
)) {
703 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Device removal detected\n"));
704 /* TBD: Handle device removal */
708 static void acpi_bus_check_scope(acpi_handle handle
)
711 acpi_bus_check_device(handle
);
714 * TBD: Enumerate child devices within this device's scope and
715 * run acpi_bus_check_device()'s on them.
719 static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list
);
720 int register_acpi_bus_notifier(struct notifier_block
*nb
)
722 return blocking_notifier_chain_register(&acpi_bus_notify_list
, nb
);
724 EXPORT_SYMBOL_GPL(register_acpi_bus_notifier
);
726 void unregister_acpi_bus_notifier(struct notifier_block
*nb
)
728 blocking_notifier_chain_unregister(&acpi_bus_notify_list
, nb
);
730 EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier
);
735 * Callback for all 'system-level' device notifications (values 0x00-0x7F).
737 static void acpi_bus_notify(acpi_handle handle
, u32 type
, void *data
)
739 struct acpi_device
*device
= NULL
;
740 struct acpi_driver
*driver
;
742 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Notification %#02x to handle %p\n",
745 blocking_notifier_call_chain(&acpi_bus_notify_list
,
746 type
, (void *)handle
);
750 case ACPI_NOTIFY_BUS_CHECK
:
751 acpi_bus_check_scope(handle
);
753 * TBD: We'll need to outsource certain events to non-ACPI
754 * drivers via the device manager (device.c).
758 case ACPI_NOTIFY_DEVICE_CHECK
:
759 acpi_bus_check_device(handle
);
761 * TBD: We'll need to outsource certain events to non-ACPI
762 * drivers via the device manager (device.c).
766 case ACPI_NOTIFY_DEVICE_WAKE
:
770 case ACPI_NOTIFY_EJECT_REQUEST
:
774 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT
:
775 /* TBD: Exactly what does 'light' mean? */
778 case ACPI_NOTIFY_FREQUENCY_MISMATCH
:
782 case ACPI_NOTIFY_BUS_MODE_MISMATCH
:
786 case ACPI_NOTIFY_POWER_FAULT
:
791 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
792 "Received unknown/unsupported notification [%08x]\n",
797 acpi_bus_get_device(handle
, &device
);
799 driver
= device
->driver
;
800 if (driver
&& driver
->ops
.notify
&&
801 (driver
->flags
& ACPI_DRIVER_ALL_NOTIFY_EVENTS
))
802 driver
->ops
.notify(device
, type
);
806 /* --------------------------------------------------------------------------
807 Initialization/Cleanup
808 -------------------------------------------------------------------------- */
810 static int __init
acpi_bus_init_irq(void)
812 acpi_status status
= AE_OK
;
813 union acpi_object arg
= { ACPI_TYPE_INTEGER
};
814 struct acpi_object_list arg_list
= { 1, &arg
};
815 char *message
= NULL
;
819 * Let the system know what interrupt model we are using by
820 * evaluating the \_PIC object, if exists.
823 switch (acpi_irq_model
) {
824 case ACPI_IRQ_MODEL_PIC
:
827 case ACPI_IRQ_MODEL_IOAPIC
:
830 case ACPI_IRQ_MODEL_IOSAPIC
:
833 case ACPI_IRQ_MODEL_PLATFORM
:
834 message
= "platform specific model";
837 printk(KERN_WARNING PREFIX
"Unknown interrupt routing model\n");
841 printk(KERN_INFO PREFIX
"Using %s for interrupt routing\n", message
);
843 arg
.integer
.value
= acpi_irq_model
;
845 status
= acpi_evaluate_object(NULL
, "\\_PIC", &arg_list
, NULL
);
846 if (ACPI_FAILURE(status
) && (status
!= AE_NOT_FOUND
)) {
847 ACPI_EXCEPTION((AE_INFO
, status
, "Evaluating _PIC"));
854 u8 acpi_gbl_permanent_mmap
;
857 void __init
acpi_early_init(void)
859 acpi_status status
= AE_OK
;
864 printk(KERN_INFO PREFIX
"Core revision %08x\n", ACPI_CA_VERSION
);
866 /* enable workarounds, unless strict ACPI spec. compliance */
868 acpi_gbl_enable_interpreter_slack
= TRUE
;
870 acpi_gbl_permanent_mmap
= 1;
873 * If the machine falls into the DMI check table,
874 * DSDT will be copied to memory
876 dmi_check_system(dsdt_dmi_table
);
878 status
= acpi_reallocate_root_table();
879 if (ACPI_FAILURE(status
)) {
880 printk(KERN_ERR PREFIX
881 "Unable to reallocate ACPI tables\n");
885 status
= acpi_initialize_subsystem();
886 if (ACPI_FAILURE(status
)) {
887 printk(KERN_ERR PREFIX
888 "Unable to initialize the ACPI Interpreter\n");
892 status
= acpi_load_tables();
893 if (ACPI_FAILURE(status
)) {
894 printk(KERN_ERR PREFIX
895 "Unable to load the System Description Tables\n");
901 /* compatible (0) means level (3) */
902 if (!(acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
)) {
903 acpi_sci_flags
&= ~ACPI_MADT_TRIGGER_MASK
;
904 acpi_sci_flags
|= ACPI_MADT_TRIGGER_LEVEL
;
906 /* Set PIC-mode SCI trigger type */
907 acpi_pic_sci_set_trigger(acpi_gbl_FADT
.sci_interrupt
,
908 (acpi_sci_flags
& ACPI_MADT_TRIGGER_MASK
) >> 2);
911 * now that acpi_gbl_FADT is initialized,
912 * update it with result from INT_SRC_OVR parsing
914 acpi_gbl_FADT
.sci_interrupt
= acpi_sci_override_gsi
;
918 status
= acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE
);
919 if (ACPI_FAILURE(status
)) {
920 printk(KERN_ERR PREFIX
"Unable to enable ACPI\n");
931 static int __init
acpi_bus_init(void)
934 acpi_status status
= AE_OK
;
935 extern acpi_status
acpi_os_initialize1(void);
937 acpi_os_initialize1();
939 status
= acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE
);
940 if (ACPI_FAILURE(status
)) {
941 printk(KERN_ERR PREFIX
942 "Unable to start the ACPI Interpreter\n");
947 * ACPI 2.0 requires the EC driver to be loaded and work before
948 * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
951 * This is accomplished by looking for the ECDT table, and getting
952 * the EC parameters out of that.
954 status
= acpi_ec_ecdt_probe();
955 /* Ignore result. Not having an ECDT is not fatal. */
957 acpi_bus_osc_support();
959 status
= acpi_initialize_objects(ACPI_FULL_INITIALIZATION
);
960 if (ACPI_FAILURE(status
)) {
961 printk(KERN_ERR PREFIX
"Unable to initialize ACPI objects\n");
966 * _PDC control method may load dynamic SSDT tables,
967 * and we need to install the table handler before that.
971 acpi_early_processor_set_pdc();
974 * Maybe EC region is required at bus_scan/acpi_get_devices. So it
975 * is necessary to enable it as early as possible.
977 acpi_boot_ec_enable();
979 printk(KERN_INFO PREFIX
"Interpreter enabled\n");
981 /* Initialize sleep structures */
985 * Get the system interrupt model and evaluate \_PIC.
987 result
= acpi_bus_init_irq();
992 * Register the for all standard device notifications.
995 acpi_install_notify_handler(ACPI_ROOT_OBJECT
, ACPI_SYSTEM_NOTIFY
,
996 &acpi_bus_notify
, NULL
);
997 if (ACPI_FAILURE(status
)) {
998 printk(KERN_ERR PREFIX
999 "Unable to register for device notifications\n");
1004 * Create the top ACPI proc directory
1006 acpi_root_dir
= proc_mkdir(ACPI_BUS_FILE_ROOT
, NULL
);
1010 /* Mimic structured exception handling */
1016 struct kobject
*acpi_kobj
;
1017 EXPORT_SYMBOL_GPL(acpi_kobj
);
1019 static int __init
acpi_init(void)
1023 if (acpi_disabled
) {
1024 printk(KERN_INFO PREFIX
"Interpreter disabled.\n");
1028 acpi_kobj
= kobject_create_and_add("acpi", firmware_kobj
);
1030 printk(KERN_WARNING
"%s: kset create error\n", __func__
);
1034 init_acpi_device_notify();
1035 result
= acpi_bus_init();
1041 pci_mmcfg_late_init();
1044 acpi_debugfs_init();
1045 acpi_sleep_proc_init();
1046 acpi_wakeup_device_init();
1050 subsys_initcall(acpi_init
);