2 * acpi_osl.c - OS-dependent functions ($Revision: 83 $)
4 * Copyright (C) 2000 Andrew Henroid
5 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
6 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
28 #include <linux/module.h>
29 #include <linux/kernel.h>
30 #include <linux/slab.h>
32 #include <linux/pci.h>
33 #include <linux/interrupt.h>
34 #include <linux/kmod.h>
35 #include <linux/delay.h>
36 #include <linux/dmi.h>
37 #include <linux/workqueue.h>
38 #include <linux/nmi.h>
39 #include <linux/acpi.h>
40 #include <acpi/acpi.h>
42 #include <acpi/acpi_bus.h>
43 #include <acpi/processor.h>
44 #include <asm/uaccess.h>
46 #include <linux/efi.h>
47 #include <linux/ioport.h>
48 #include <linux/list.h>
50 #define _COMPONENT ACPI_OS_SERVICES
51 ACPI_MODULE_NAME("osl");
52 #define PREFIX "ACPI: "
54 acpi_osd_exec_callback function
;
56 struct work_struct work
;
59 #ifdef CONFIG_ACPI_CUSTOM_DSDT
60 #include CONFIG_ACPI_CUSTOM_DSDT_FILE
63 #ifdef ENABLE_DEBUGGER
64 #include <linux/kdb.h>
66 /* stuff for debugger support */
68 EXPORT_SYMBOL(acpi_in_debugger
);
70 extern char line_buf
[80];
71 #endif /*ENABLE_DEBUGGER */
73 static unsigned int acpi_irq_irq
;
74 static acpi_osd_handler acpi_irq_handler
;
75 static void *acpi_irq_context
;
76 static struct workqueue_struct
*kacpid_wq
;
77 static struct workqueue_struct
*kacpi_notify_wq
;
79 struct acpi_res_list
{
80 resource_size_t start
;
82 acpi_adr_space_type resource_type
; /* IO port, System memory, ...*/
83 char name
[5]; /* only can have a length of 4 chars, make use of this
84 one instead of res->name, no need to kalloc then */
85 struct list_head resource_list
;
88 static LIST_HEAD(resource_list_head
);
89 static DEFINE_SPINLOCK(acpi_res_lock
);
91 #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
92 static char osi_additional_string
[OSI_STRING_LENGTH_MAX
];
95 * "Ode to _OSI(Linux)"
97 * osi_linux -- Control response to BIOS _OSI(Linux) query.
99 * As Linux evolves, the features that it supports change.
100 * So an OSI string such as "Linux" is not specific enough
101 * to be useful across multiple versions of Linux. It
102 * doesn't identify any particular feature, interface,
103 * or even any particular version of Linux...
105 * Unfortunately, Linux-2.6.22 and earlier responded "yes"
106 * to a BIOS _OSI(Linux) query. When
107 * a reference mobile BIOS started using it, its use
108 * started to spread to many vendor platforms.
109 * As it is not supportable, we need to halt that spread.
111 * Today, most BIOS references to _OSI(Linux) are noise --
112 * they have no functional effect and are just dead code
113 * carried over from the reference BIOS.
115 * The next most common case is that _OSI(Linux) harms Linux,
116 * usually by causing the BIOS to follow paths that are
117 * not tested during Windows validation.
119 * Finally, there is a short list of platforms
120 * where OSI(Linux) benefits Linux.
122 * In Linux-2.6.23, OSI(Linux) is first disabled by default.
123 * DMI is used to disable the dmesg warning about OSI(Linux)
124 * on platforms where it is known to have no effect.
125 * But a dmesg warning remains for systems where
126 * we do not know if OSI(Linux) is good or bad for the system.
127 * DMI is also used to enable OSI(Linux) for the machines
128 * that are known to need it.
130 * BIOS writers should NOT query _OSI(Linux) on future systems.
131 * It will be ignored by default, and to get Linux to
132 * not ignore it will require a kernel source update to
133 * add a DMI entry, or a boot-time "acpi_osi=Linux" invocation.
135 #define OSI_LINUX_ENABLE 0
138 unsigned int enable
:1;
140 unsigned int cmdline
:1;
141 unsigned int known
:1;
142 } osi_linux
= { OSI_LINUX_ENABLE
, 0, 0, 0};
144 static void __init
acpi_request_region (struct acpi_generic_address
*addr
,
145 unsigned int length
, char *desc
)
147 struct resource
*res
;
149 if (!addr
->address
|| !length
)
152 if (addr
->space_id
== ACPI_ADR_SPACE_SYSTEM_IO
)
153 res
= request_region(addr
->address
, length
, desc
);
154 else if (addr
->space_id
== ACPI_ADR_SPACE_SYSTEM_MEMORY
)
155 res
= request_mem_region(addr
->address
, length
, desc
);
158 static int __init
acpi_reserve_resources(void)
160 acpi_request_region(&acpi_gbl_FADT
.xpm1a_event_block
, acpi_gbl_FADT
.pm1_event_length
,
161 "ACPI PM1a_EVT_BLK");
163 acpi_request_region(&acpi_gbl_FADT
.xpm1b_event_block
, acpi_gbl_FADT
.pm1_event_length
,
164 "ACPI PM1b_EVT_BLK");
166 acpi_request_region(&acpi_gbl_FADT
.xpm1a_control_block
, acpi_gbl_FADT
.pm1_control_length
,
167 "ACPI PM1a_CNT_BLK");
169 acpi_request_region(&acpi_gbl_FADT
.xpm1b_control_block
, acpi_gbl_FADT
.pm1_control_length
,
170 "ACPI PM1b_CNT_BLK");
172 if (acpi_gbl_FADT
.pm_timer_length
== 4)
173 acpi_request_region(&acpi_gbl_FADT
.xpm_timer_block
, 4, "ACPI PM_TMR");
175 acpi_request_region(&acpi_gbl_FADT
.xpm2_control_block
, acpi_gbl_FADT
.pm2_control_length
,
178 /* Length of GPE blocks must be a non-negative multiple of 2 */
180 if (!(acpi_gbl_FADT
.gpe0_block_length
& 0x1))
181 acpi_request_region(&acpi_gbl_FADT
.xgpe0_block
,
182 acpi_gbl_FADT
.gpe0_block_length
, "ACPI GPE0_BLK");
184 if (!(acpi_gbl_FADT
.gpe1_block_length
& 0x1))
185 acpi_request_region(&acpi_gbl_FADT
.xgpe1_block
,
186 acpi_gbl_FADT
.gpe1_block_length
, "ACPI GPE1_BLK");
190 device_initcall(acpi_reserve_resources
);
192 acpi_status __init
acpi_os_initialize(void)
197 acpi_status
acpi_os_initialize1(void)
200 * Initialize PCI configuration space access, as we'll need to access
201 * it while walking the namespace (bus 0 and root bridges w/ _BBNs).
204 printk(KERN_ERR PREFIX
205 "Access to PCI configuration space unavailable\n");
206 return AE_NULL_ENTRY
;
208 kacpid_wq
= create_singlethread_workqueue("kacpid");
209 kacpi_notify_wq
= create_singlethread_workqueue("kacpi_notify");
211 BUG_ON(!kacpi_notify_wq
);
215 acpi_status
acpi_os_terminate(void)
217 if (acpi_irq_handler
) {
218 acpi_os_remove_interrupt_handler(acpi_irq_irq
,
222 destroy_workqueue(kacpid_wq
);
223 destroy_workqueue(kacpi_notify_wq
);
228 void acpi_os_printf(const char *fmt
, ...)
232 acpi_os_vprintf(fmt
, args
);
236 EXPORT_SYMBOL(acpi_os_printf
);
238 void acpi_os_vprintf(const char *fmt
, va_list args
)
240 static char buffer
[512];
242 vsprintf(buffer
, fmt
, args
);
244 #ifdef ENABLE_DEBUGGER
245 if (acpi_in_debugger
) {
246 kdb_printf("%s", buffer
);
248 printk("%s", buffer
);
251 printk("%s", buffer
);
255 acpi_physical_address __init
acpi_os_get_root_pointer(void)
258 if (efi
.acpi20
!= EFI_INVALID_TABLE_ADDR
)
260 else if (efi
.acpi
!= EFI_INVALID_TABLE_ADDR
)
263 printk(KERN_ERR PREFIX
264 "System description tables not found\n");
268 return acpi_find_rsdp();
271 void __iomem
*acpi_os_map_memory(acpi_physical_address phys
, acpi_size size
)
273 if (phys
> ULONG_MAX
) {
274 printk(KERN_ERR PREFIX
"Cannot map memory that high\n");
277 if (acpi_gbl_permanent_mmap
)
279 * ioremap checks to ensure this is in reserved space
281 return ioremap((unsigned long)phys
, size
);
283 return __acpi_map_table((unsigned long)phys
, size
);
285 EXPORT_SYMBOL_GPL(acpi_os_map_memory
);
287 void acpi_os_unmap_memory(void __iomem
* virt
, acpi_size size
)
289 if (acpi_gbl_permanent_mmap
) {
293 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory
);
295 #ifdef ACPI_FUTURE_USAGE
297 acpi_os_get_physical_address(void *virt
, acpi_physical_address
* phys
)
300 return AE_BAD_PARAMETER
;
302 *phys
= virt_to_phys(virt
);
308 #define ACPI_MAX_OVERRIDE_LEN 100
310 static char acpi_os_name
[ACPI_MAX_OVERRIDE_LEN
];
313 acpi_os_predefined_override(const struct acpi_predefined_names
*init_val
,
314 acpi_string
* new_val
)
316 if (!init_val
|| !new_val
)
317 return AE_BAD_PARAMETER
;
320 if (!memcmp(init_val
->name
, "_OS_", 4) && strlen(acpi_os_name
)) {
321 printk(KERN_INFO PREFIX
"Overriding _OS definition to '%s'\n",
323 *new_val
= acpi_os_name
;
330 acpi_os_table_override(struct acpi_table_header
* existing_table
,
331 struct acpi_table_header
** new_table
)
333 if (!existing_table
|| !new_table
)
334 return AE_BAD_PARAMETER
;
336 #ifdef CONFIG_ACPI_CUSTOM_DSDT
337 if (strncmp(existing_table
->signature
, "DSDT", 4) == 0)
338 *new_table
= (struct acpi_table_header
*)AmlCode
;
347 static irqreturn_t
acpi_irq(int irq
, void *dev_id
)
349 return (*acpi_irq_handler
) (acpi_irq_context
) ? IRQ_HANDLED
: IRQ_NONE
;
353 acpi_os_install_interrupt_handler(u32 gsi
, acpi_osd_handler handler
,
359 * Ignore the GSI from the core, and use the value in our copy of the
360 * FADT. It may not be the same if an interrupt source override exists
363 gsi
= acpi_gbl_FADT
.sci_interrupt
;
364 if (acpi_gsi_to_irq(gsi
, &irq
) < 0) {
365 printk(KERN_ERR PREFIX
"SCI (ACPI GSI %d) not registered\n",
370 acpi_irq_handler
= handler
;
371 acpi_irq_context
= context
;
372 if (request_irq(irq
, acpi_irq
, IRQF_SHARED
, "acpi", acpi_irq
)) {
373 printk(KERN_ERR PREFIX
"SCI (IRQ%d) allocation failed\n", irq
);
374 return AE_NOT_ACQUIRED
;
381 acpi_status
acpi_os_remove_interrupt_handler(u32 irq
, acpi_osd_handler handler
)
384 free_irq(irq
, acpi_irq
);
385 acpi_irq_handler
= NULL
;
393 * Running in interpreter thread context, safe to sleep
396 void acpi_os_sleep(acpi_integer ms
)
398 schedule_timeout_interruptible(msecs_to_jiffies(ms
));
401 EXPORT_SYMBOL(acpi_os_sleep
);
403 void acpi_os_stall(u32 us
)
411 touch_nmi_watchdog();
416 EXPORT_SYMBOL(acpi_os_stall
);
419 * Support ACPI 3.0 AML Timer operand
420 * Returns 64-bit free-running, monotonically increasing timer
421 * with 100ns granularity
423 u64
acpi_os_get_timer(void)
428 /* TBD: use HPET if available */
431 #ifdef CONFIG_X86_PM_TIMER
432 /* TBD: default to PM timer if HPET was not available */
435 printk(KERN_ERR PREFIX
"acpi_os_get_timer() TBD\n");
440 acpi_status
acpi_os_read_port(acpi_io_address port
, u32
* value
, u32 width
)
449 *(u8
*) value
= inb(port
);
450 } else if (width
<= 16) {
451 *(u16
*) value
= inw(port
);
452 } else if (width
<= 32) {
453 *(u32
*) value
= inl(port
);
461 EXPORT_SYMBOL(acpi_os_read_port
);
463 acpi_status
acpi_os_write_port(acpi_io_address port
, u32 value
, u32 width
)
467 } else if (width
<= 16) {
469 } else if (width
<= 32) {
478 EXPORT_SYMBOL(acpi_os_write_port
);
481 acpi_os_read_memory(acpi_physical_address phys_addr
, u32
* value
, u32 width
)
484 void __iomem
*virt_addr
;
486 virt_addr
= ioremap(phys_addr
, width
);
492 *(u8
*) value
= readb(virt_addr
);
495 *(u16
*) value
= readw(virt_addr
);
498 *(u32
*) value
= readl(virt_addr
);
510 acpi_os_write_memory(acpi_physical_address phys_addr
, u32 value
, u32 width
)
512 void __iomem
*virt_addr
;
514 virt_addr
= ioremap(phys_addr
, width
);
518 writeb(value
, virt_addr
);
521 writew(value
, virt_addr
);
524 writel(value
, virt_addr
);
536 acpi_os_read_pci_configuration(struct acpi_pci_id
* pci_id
, u32 reg
,
537 void *value
, u32 width
)
542 return AE_BAD_PARAMETER
;
558 BUG_ON(!raw_pci_ops
);
560 result
= raw_pci_ops
->read(pci_id
->segment
, pci_id
->bus
,
561 PCI_DEVFN(pci_id
->device
, pci_id
->function
),
564 return (result
? AE_ERROR
: AE_OK
);
567 EXPORT_SYMBOL(acpi_os_read_pci_configuration
);
570 acpi_os_write_pci_configuration(struct acpi_pci_id
* pci_id
, u32 reg
,
571 acpi_integer value
, u32 width
)
589 BUG_ON(!raw_pci_ops
);
591 result
= raw_pci_ops
->write(pci_id
->segment
, pci_id
->bus
,
592 PCI_DEVFN(pci_id
->device
, pci_id
->function
),
595 return (result
? AE_ERROR
: AE_OK
);
598 /* TODO: Change code to take advantage of driver model more */
599 static void acpi_os_derive_pci_id_2(acpi_handle rhandle
, /* upper bound */
600 acpi_handle chandle
, /* current node */
601 struct acpi_pci_id
**id
,
602 int *is_bridge
, u8
* bus_number
)
605 struct acpi_pci_id
*pci_id
= *id
;
608 acpi_object_type type
;
611 acpi_get_parent(chandle
, &handle
);
612 if (handle
!= rhandle
) {
613 acpi_os_derive_pci_id_2(rhandle
, handle
, &pci_id
, is_bridge
,
616 status
= acpi_get_type(handle
, &type
);
617 if ((ACPI_FAILURE(status
)) || (type
!= ACPI_TYPE_DEVICE
))
621 acpi_evaluate_integer(handle
, METHOD_NAME__ADR
, NULL
,
623 if (ACPI_SUCCESS(status
)) {
624 pci_id
->device
= ACPI_HIWORD(ACPI_LODWORD(temp
));
625 pci_id
->function
= ACPI_LOWORD(ACPI_LODWORD(temp
));
628 pci_id
->bus
= *bus_number
;
630 /* any nicer way to get bus number of bridge ? */
632 acpi_os_read_pci_configuration(pci_id
, 0x0e, &tu8
,
634 if (ACPI_SUCCESS(status
)
635 && ((tu8
& 0x7f) == 1 || (tu8
& 0x7f) == 2)) {
637 acpi_os_read_pci_configuration(pci_id
, 0x18,
639 if (!ACPI_SUCCESS(status
)) {
640 /* Certainly broken... FIX ME */
646 acpi_os_read_pci_configuration(pci_id
, 0x19,
648 if (ACPI_SUCCESS(status
)) {
657 void acpi_os_derive_pci_id(acpi_handle rhandle
, /* upper bound */
658 acpi_handle chandle
, /* current node */
659 struct acpi_pci_id
**id
)
662 u8 bus_number
= (*id
)->bus
;
664 acpi_os_derive_pci_id_2(rhandle
, chandle
, id
, &is_bridge
, &bus_number
);
667 static void acpi_os_execute_deferred(struct work_struct
*work
)
669 struct acpi_os_dpc
*dpc
= container_of(work
, struct acpi_os_dpc
, work
);
671 printk(KERN_ERR PREFIX
"Invalid (NULL) context\n");
675 dpc
->function(dpc
->context
);
678 /* Yield cpu to notify thread */
684 static void acpi_os_execute_notify(struct work_struct
*work
)
686 struct acpi_os_dpc
*dpc
= container_of(work
, struct acpi_os_dpc
, work
);
689 printk(KERN_ERR PREFIX
"Invalid (NULL) context\n");
693 dpc
->function(dpc
->context
);
700 /*******************************************************************************
702 * FUNCTION: acpi_os_execute
704 * PARAMETERS: Type - Type of the callback
705 * Function - Function to be executed
706 * Context - Function parameters
710 * DESCRIPTION: Depending on type, either queues function for deferred execution or
711 * immediately executes function on a separate thread.
713 ******************************************************************************/
715 acpi_status
acpi_os_execute(acpi_execute_type type
,
716 acpi_osd_exec_callback function
, void *context
)
718 acpi_status status
= AE_OK
;
719 struct acpi_os_dpc
*dpc
;
721 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
,
722 "Scheduling function [%p(%p)] for deferred execution.\n",
726 return AE_BAD_PARAMETER
;
729 * Allocate/initialize DPC structure. Note that this memory will be
730 * freed by the callee. The kernel handles the work_struct list in a
731 * way that allows us to also free its memory inside the callee.
732 * Because we may want to schedule several tasks with different
733 * parameters we can't use the approach some kernel code uses of
734 * having a static work_struct.
737 dpc
= kmalloc(sizeof(struct acpi_os_dpc
), GFP_ATOMIC
);
739 return_ACPI_STATUS(AE_NO_MEMORY
);
741 dpc
->function
= function
;
742 dpc
->context
= context
;
744 if (type
== OSL_NOTIFY_HANDLER
) {
745 INIT_WORK(&dpc
->work
, acpi_os_execute_notify
);
746 if (!queue_work(kacpi_notify_wq
, &dpc
->work
)) {
751 INIT_WORK(&dpc
->work
, acpi_os_execute_deferred
);
752 if (!queue_work(kacpid_wq
, &dpc
->work
)) {
753 ACPI_DEBUG_PRINT((ACPI_DB_ERROR
,
754 "Call to queue_work() failed.\n"));
759 return_ACPI_STATUS(status
);
762 EXPORT_SYMBOL(acpi_os_execute
);
764 void acpi_os_wait_events_complete(void *context
)
766 flush_workqueue(kacpid_wq
);
769 EXPORT_SYMBOL(acpi_os_wait_events_complete
);
772 * Allocate the memory for a spinlock and initialize it.
774 acpi_status
acpi_os_create_lock(acpi_spinlock
* handle
)
776 spin_lock_init(*handle
);
782 * Deallocate the memory for a spinlock.
784 void acpi_os_delete_lock(acpi_spinlock handle
)
790 acpi_os_create_semaphore(u32 max_units
, u32 initial_units
, acpi_handle
* handle
)
792 struct semaphore
*sem
= NULL
;
795 sem
= acpi_os_allocate(sizeof(struct semaphore
));
798 memset(sem
, 0, sizeof(struct semaphore
));
800 sema_init(sem
, initial_units
);
802 *handle
= (acpi_handle
*) sem
;
804 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Creating semaphore[%p|%d].\n",
805 *handle
, initial_units
));
810 EXPORT_SYMBOL(acpi_os_create_semaphore
);
813 * TODO: A better way to delete semaphores? Linux doesn't have a
814 * 'delete_semaphore()' function -- may result in an invalid
815 * pointer dereference for non-synchronized consumers. Should
816 * we at least check for blocked threads and signal/cancel them?
819 acpi_status
acpi_os_delete_semaphore(acpi_handle handle
)
821 struct semaphore
*sem
= (struct semaphore
*)handle
;
825 return AE_BAD_PARAMETER
;
827 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Deleting semaphore[%p].\n", handle
));
835 EXPORT_SYMBOL(acpi_os_delete_semaphore
);
838 * TODO: The kernel doesn't have a 'down_timeout' function -- had to
839 * improvise. The process is to sleep for one scheduler quantum
840 * until the semaphore becomes available. Downside is that this
841 * may result in starvation for timeout-based waits when there's
842 * lots of semaphore activity.
844 * TODO: Support for units > 1?
846 acpi_status
acpi_os_wait_semaphore(acpi_handle handle
, u32 units
, u16 timeout
)
848 acpi_status status
= AE_OK
;
849 struct semaphore
*sem
= (struct semaphore
*)handle
;
853 if (!sem
|| (units
< 1))
854 return AE_BAD_PARAMETER
;
859 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Waiting for semaphore[%p|%d|%d]\n",
860 handle
, units
, timeout
));
863 * This can be called during resume with interrupts off.
864 * Like boot-time, we should be single threaded and will
865 * always get the lock if we try -- timeout or not.
866 * If this doesn't succeed, then we will oops courtesy of
867 * might_sleep() in down().
869 if (!down_trylock(sem
))
876 * A zero timeout value indicates that we shouldn't wait - just
877 * acquire the semaphore if available otherwise return AE_TIME
878 * (a.k.a. 'would block').
881 if (down_trylock(sem
))
889 case ACPI_WAIT_FOREVER
:
898 // TODO: A better timeout algorithm?
901 static const int quantum_ms
= 1000 / HZ
;
903 ret
= down_trylock(sem
);
904 for (i
= timeout
; (i
> 0 && ret
!= 0); i
-= quantum_ms
) {
905 schedule_timeout_interruptible(1);
906 ret
= down_trylock(sem
);
915 if (ACPI_FAILURE(status
)) {
916 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
,
917 "Failed to acquire semaphore[%p|%d|%d], %s",
918 handle
, units
, timeout
,
919 acpi_format_exception(status
)));
921 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
,
922 "Acquired semaphore[%p|%d|%d]", handle
,
929 EXPORT_SYMBOL(acpi_os_wait_semaphore
);
932 * TODO: Support for units > 1?
934 acpi_status
acpi_os_signal_semaphore(acpi_handle handle
, u32 units
)
936 struct semaphore
*sem
= (struct semaphore
*)handle
;
939 if (!sem
|| (units
< 1))
940 return AE_BAD_PARAMETER
;
945 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Signaling semaphore[%p|%d]\n", handle
,
953 EXPORT_SYMBOL(acpi_os_signal_semaphore
);
955 #ifdef ACPI_FUTURE_USAGE
956 u32
acpi_os_get_line(char *buffer
)
959 #ifdef ENABLE_DEBUGGER
960 if (acpi_in_debugger
) {
963 kdb_read(buffer
, sizeof(line_buf
));
965 /* remove the CR kdb includes */
966 chars
= strlen(buffer
) - 1;
967 buffer
[chars
] = '\0';
973 #endif /* ACPI_FUTURE_USAGE */
975 acpi_status
acpi_os_signal(u32 function
, void *info
)
978 case ACPI_SIGNAL_FATAL
:
979 printk(KERN_ERR PREFIX
"Fatal opcode executed\n");
981 case ACPI_SIGNAL_BREAKPOINT
:
984 * ACPI spec. says to treat it as a NOP unless
985 * you are debugging. So if/when we integrate
986 * AML debugger into the kernel debugger its
987 * hook will go here. But until then it is
988 * not useful to print anything on breakpoints.
998 EXPORT_SYMBOL(acpi_os_signal
);
1000 static int __init
acpi_os_name_setup(char *str
)
1002 char *p
= acpi_os_name
;
1003 int count
= ACPI_MAX_OVERRIDE_LEN
- 1;
1008 for (; count
-- && str
&& *str
; str
++) {
1009 if (isalnum(*str
) || *str
== ' ' || *str
== ':')
1011 else if (*str
== '\'' || *str
== '"')
1022 __setup("acpi_os_name=", acpi_os_name_setup
);
1024 static void __init
set_osi_linux(unsigned int enable
)
1026 if (osi_linux
.enable
!= enable
) {
1027 osi_linux
.enable
= enable
;
1028 printk(KERN_NOTICE PREFIX
"%sed _OSI(Linux)\n",
1029 enable
? "Add": "Delet");
1034 static void __init
acpi_cmdline_osi_linux(unsigned int enable
)
1036 osi_linux
.cmdline
= 1; /* cmdline set the default */
1037 set_osi_linux(enable
);
1042 void __init
acpi_dmi_osi_linux(int enable
, const struct dmi_system_id
*d
)
1044 osi_linux
.dmi
= 1; /* DMI knows that this box asks OSI(Linux) */
1046 printk(KERN_NOTICE PREFIX
"DMI detected: %s\n", d
->ident
);
1051 osi_linux
.known
= 1; /* DMI knows which OSI(Linux) default needed */
1053 set_osi_linux(enable
);
1059 * Modify the list of "OS Interfaces" reported to BIOS via _OSI
1061 * empty string disables _OSI
1062 * string starting with '!' disables that string
1063 * otherwise string is added to list, augmenting built-in strings
1065 static int __init
acpi_osi_setup(char *str
)
1067 if (str
== NULL
|| *str
== '\0') {
1068 printk(KERN_INFO PREFIX
"_OSI method disabled\n");
1069 acpi_gbl_create_osi_method
= FALSE
;
1070 } else if (!strcmp("!Linux", str
)) {
1071 acpi_cmdline_osi_linux(0); /* !enable */
1072 } else if (*str
== '!') {
1073 if (acpi_osi_invalidate(++str
) == AE_OK
)
1074 printk(KERN_INFO PREFIX
"Deleted _OSI(%s)\n", str
);
1075 } else if (!strcmp("Linux", str
)) {
1076 acpi_cmdline_osi_linux(1); /* enable */
1077 } else if (*osi_additional_string
== '\0') {
1078 strncpy(osi_additional_string
, str
, OSI_STRING_LENGTH_MAX
);
1079 printk(KERN_INFO PREFIX
"Added _OSI(%s)\n", str
);
1085 __setup("acpi_osi=", acpi_osi_setup
);
1087 /* enable serialization to combat AE_ALREADY_EXISTS errors */
1088 static int __init
acpi_serialize_setup(char *str
)
1090 printk(KERN_INFO PREFIX
"serialize enabled\n");
1092 acpi_gbl_all_methods_serialized
= TRUE
;
1097 __setup("acpi_serialize", acpi_serialize_setup
);
1100 * Wake and Run-Time GPES are expected to be separate.
1101 * We disable wake-GPEs at run-time to prevent spurious
1104 * However, if a system exists that shares Wake and
1105 * Run-time events on the same GPE this flag is available
1106 * to tell Linux to keep the wake-time GPEs enabled at run-time.
1108 static int __init
acpi_wake_gpes_always_on_setup(char *str
)
1110 printk(KERN_INFO PREFIX
"wake GPEs not disabled\n");
1112 acpi_gbl_leave_wake_gpes_disabled
= FALSE
;
1117 __setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_setup
);
1119 /* Check of resource interference between native drivers and ACPI
1120 * OperationRegions (SystemIO and System Memory only).
1121 * IO ports and memory declared in ACPI might be used by the ACPI subsystem
1122 * in arbitrary AML code and can interfere with legacy drivers.
1123 * acpi_enforce_resources= can be set to:
1126 * -> further driver trying to access the resources will not load
1127 * - lax (default) (1)
1128 * -> further driver trying to access the resources will load, but you
1129 * get a system message that something might go wrong...
1132 * -> ACPI Operation Region resources will not be registered
1135 #define ENFORCE_RESOURCES_STRICT 2
1136 #define ENFORCE_RESOURCES_LAX 1
1137 #define ENFORCE_RESOURCES_NO 0
1139 static unsigned int acpi_enforce_resources
= ENFORCE_RESOURCES_LAX
;
1141 static int __init
acpi_enforce_resources_setup(char *str
)
1143 if (str
== NULL
|| *str
== '\0')
1146 if (!strcmp("strict", str
))
1147 acpi_enforce_resources
= ENFORCE_RESOURCES_STRICT
;
1148 else if (!strcmp("lax", str
))
1149 acpi_enforce_resources
= ENFORCE_RESOURCES_LAX
;
1150 else if (!strcmp("no", str
))
1151 acpi_enforce_resources
= ENFORCE_RESOURCES_NO
;
1156 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup
);
1158 /* Check for resource conflicts between ACPI OperationRegions and native
1160 int acpi_check_resource_conflict(struct resource
*res
)
1162 struct acpi_res_list
*res_list_elem
;
1166 if (acpi_enforce_resources
== ENFORCE_RESOURCES_NO
)
1168 if (!(res
->flags
& IORESOURCE_IO
) && !(res
->flags
& IORESOURCE_MEM
))
1171 ioport
= res
->flags
& IORESOURCE_IO
;
1173 spin_lock(&acpi_res_lock
);
1174 list_for_each_entry(res_list_elem
, &resource_list_head
,
1176 if (ioport
&& (res_list_elem
->resource_type
1177 != ACPI_ADR_SPACE_SYSTEM_IO
))
1179 if (!ioport
&& (res_list_elem
->resource_type
1180 != ACPI_ADR_SPACE_SYSTEM_MEMORY
))
1183 if (res
->end
< res_list_elem
->start
1184 || res_list_elem
->end
< res
->start
)
1189 spin_unlock(&acpi_res_lock
);
1192 if (acpi_enforce_resources
!= ENFORCE_RESOURCES_NO
) {
1193 printk(KERN_INFO
"%sACPI: %s resource %s [0x%llx-0x%llx]"
1194 " conflicts with ACPI region %s"
1195 " [0x%llx-0x%llx]\n",
1196 acpi_enforce_resources
== ENFORCE_RESOURCES_LAX
1197 ? KERN_WARNING
: KERN_ERR
,
1198 ioport
? "I/O" : "Memory", res
->name
,
1199 (long long) res
->start
, (long long) res
->end
,
1200 res_list_elem
->name
,
1201 (long long) res_list_elem
->start
,
1202 (long long) res_list_elem
->end
);
1203 printk(KERN_INFO
"ACPI: Device needs an ACPI driver\n");
1205 if (acpi_enforce_resources
== ENFORCE_RESOURCES_STRICT
)
1210 EXPORT_SYMBOL(acpi_check_resource_conflict
);
1212 int acpi_check_region(resource_size_t start
, resource_size_t n
,
1215 struct resource res
= {
1217 .end
= start
+ n
- 1,
1219 .flags
= IORESOURCE_IO
,
1222 return acpi_check_resource_conflict(&res
);
1224 EXPORT_SYMBOL(acpi_check_region
);
1226 int acpi_check_mem_region(resource_size_t start
, resource_size_t n
,
1229 struct resource res
= {
1231 .end
= start
+ n
- 1,
1233 .flags
= IORESOURCE_MEM
,
1236 return acpi_check_resource_conflict(&res
);
1239 EXPORT_SYMBOL(acpi_check_mem_region
);
1242 * Acquire a spinlock.
1244 * handle is a pointer to the spinlock_t.
1247 acpi_cpu_flags
acpi_os_acquire_lock(acpi_spinlock lockp
)
1249 acpi_cpu_flags flags
;
1250 spin_lock_irqsave(lockp
, flags
);
1255 * Release a spinlock. See above.
1258 void acpi_os_release_lock(acpi_spinlock lockp
, acpi_cpu_flags flags
)
1260 spin_unlock_irqrestore(lockp
, flags
);
1263 #ifndef ACPI_USE_LOCAL_CACHE
1265 /*******************************************************************************
1267 * FUNCTION: acpi_os_create_cache
1269 * PARAMETERS: name - Ascii name for the cache
1270 * size - Size of each cached object
1271 * depth - Maximum depth of the cache (in objects) <ignored>
1272 * cache - Where the new cache object is returned
1276 * DESCRIPTION: Create a cache object
1278 ******************************************************************************/
1281 acpi_os_create_cache(char *name
, u16 size
, u16 depth
, acpi_cache_t
** cache
)
1283 *cache
= kmem_cache_create(name
, size
, 0, 0, NULL
);
1290 /*******************************************************************************
1292 * FUNCTION: acpi_os_purge_cache
1294 * PARAMETERS: Cache - Handle to cache object
1298 * DESCRIPTION: Free all objects within the requested cache.
1300 ******************************************************************************/
1302 acpi_status
acpi_os_purge_cache(acpi_cache_t
* cache
)
1304 kmem_cache_shrink(cache
);
1308 /*******************************************************************************
1310 * FUNCTION: acpi_os_delete_cache
1312 * PARAMETERS: Cache - Handle to cache object
1316 * DESCRIPTION: Free all objects within the requested cache and delete the
1319 ******************************************************************************/
1321 acpi_status
acpi_os_delete_cache(acpi_cache_t
* cache
)
1323 kmem_cache_destroy(cache
);
1327 /*******************************************************************************
1329 * FUNCTION: acpi_os_release_object
1331 * PARAMETERS: Cache - Handle to cache object
1332 * Object - The object to be released
1336 * DESCRIPTION: Release an object to the specified cache. If cache is full,
1337 * the object is deleted.
1339 ******************************************************************************/
1341 acpi_status
acpi_os_release_object(acpi_cache_t
* cache
, void *object
)
1343 kmem_cache_free(cache
, object
);
1348 * acpi_dmi_dump - dump DMI slots needed for blacklist entry
1350 * Returns 0 on success
1352 int acpi_dmi_dump(void)
1358 printk(KERN_NOTICE PREFIX
"DMI System Vendor: %s\n",
1359 dmi_get_slot(DMI_SYS_VENDOR
));
1360 printk(KERN_NOTICE PREFIX
"DMI Product Name: %s\n",
1361 dmi_get_slot(DMI_PRODUCT_NAME
));
1362 printk(KERN_NOTICE PREFIX
"DMI Product Version: %s\n",
1363 dmi_get_slot(DMI_PRODUCT_VERSION
));
1364 printk(KERN_NOTICE PREFIX
"DMI Board Name: %s\n",
1365 dmi_get_slot(DMI_BOARD_NAME
));
1366 printk(KERN_NOTICE PREFIX
"DMI BIOS Vendor: %s\n",
1367 dmi_get_slot(DMI_BIOS_VENDOR
));
1368 printk(KERN_NOTICE PREFIX
"DMI BIOS Date: %s\n",
1369 dmi_get_slot(DMI_BIOS_DATE
));
1375 /******************************************************************************
1377 * FUNCTION: acpi_os_validate_interface
1379 * PARAMETERS: interface - Requested interface to be validated
1381 * RETURN: AE_OK if interface is supported, AE_SUPPORT otherwise
1383 * DESCRIPTION: Match an interface string to the interfaces supported by the
1384 * host. Strings originate from an AML call to the _OSI method.
1386 *****************************************************************************/
1389 acpi_os_validate_interface (char *interface
)
1391 if (!strncmp(osi_additional_string
, interface
, OSI_STRING_LENGTH_MAX
))
1393 if (!strcmp("Linux", interface
)) {
1395 printk(KERN_NOTICE PREFIX
1396 "BIOS _OSI(Linux) query %s%s\n",
1397 osi_linux
.enable
? "honored" : "ignored",
1398 osi_linux
.cmdline
? " via cmdline" :
1399 osi_linux
.dmi
? " via DMI" : "");
1401 if (!osi_linux
.dmi
) {
1402 if (acpi_dmi_dump())
1403 printk(KERN_NOTICE PREFIX
1404 "[please extract dmidecode output]\n");
1405 printk(KERN_NOTICE PREFIX
1406 "Please send DMI info above to "
1407 "linux-acpi@vger.kernel.org\n");
1409 if (!osi_linux
.known
&& !osi_linux
.cmdline
) {
1410 printk(KERN_NOTICE PREFIX
1411 "If \"acpi_osi=%sLinux\" works better, "
1412 "please notify linux-acpi@vger.kernel.org\n",
1413 osi_linux
.enable
? "!" : "");
1416 if (osi_linux
.enable
)
1422 /******************************************************************************
1424 * FUNCTION: acpi_os_validate_address
1426 * PARAMETERS: space_id - ACPI space ID
1427 * address - Physical address
1428 * length - Address length
1430 * RETURN: AE_OK if address/length is valid for the space_id. Otherwise,
1431 * should return AE_AML_ILLEGAL_ADDRESS.
1433 * DESCRIPTION: Validate a system address via the host OS. Used to validate
1434 * the addresses accessed by AML operation regions.
1436 *****************************************************************************/
1439 acpi_os_validate_address (
1441 acpi_physical_address address
,
1445 struct acpi_res_list
*res
;
1446 if (acpi_enforce_resources
== ENFORCE_RESOURCES_NO
)
1450 case ACPI_ADR_SPACE_SYSTEM_IO
:
1451 case ACPI_ADR_SPACE_SYSTEM_MEMORY
:
1452 /* Only interference checks against SystemIO and SytemMemory
1454 res
= kzalloc(sizeof(struct acpi_res_list
), GFP_KERNEL
);
1457 /* ACPI names are fixed to 4 bytes, still better use strlcpy */
1458 strlcpy(res
->name
, name
, 5);
1459 res
->start
= address
;
1460 res
->end
= address
+ length
- 1;
1461 res
->resource_type
= space_id
;
1462 spin_lock(&acpi_res_lock
);
1463 list_add(&res
->resource_list
, &resource_list_head
);
1464 spin_unlock(&acpi_res_lock
);
1465 pr_debug("Added %s resource: start: 0x%llx, end: 0x%llx, "
1466 "name: %s\n", (space_id
== ACPI_ADR_SPACE_SYSTEM_IO
)
1467 ? "SystemIO" : "System Memory",
1468 (unsigned long long)res
->start
,
1469 (unsigned long long)res
->end
,
1472 case ACPI_ADR_SPACE_PCI_CONFIG
:
1473 case ACPI_ADR_SPACE_EC
:
1474 case ACPI_ADR_SPACE_SMBUS
:
1475 case ACPI_ADR_SPACE_CMOS
:
1476 case ACPI_ADR_SPACE_PCI_BAR_TARGET
:
1477 case ACPI_ADR_SPACE_DATA_TABLE
:
1478 case ACPI_ADR_SPACE_FIXED_HARDWARE
: