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/workqueue.h>
37 #include <linux/nmi.h>
38 #include <linux/acpi.h>
39 #include <acpi/acpi.h>
41 #include <acpi/acpi_bus.h>
42 #include <acpi/processor.h>
43 #include <asm/uaccess.h>
45 #include <linux/efi.h>
47 #define _COMPONENT ACPI_OS_SERVICES
48 ACPI_MODULE_NAME("osl");
49 #define PREFIX "ACPI: "
51 acpi_osd_exec_callback function
;
53 struct work_struct work
;
56 #ifdef CONFIG_ACPI_CUSTOM_DSDT
57 #include CONFIG_ACPI_CUSTOM_DSDT_FILE
60 #ifdef ENABLE_DEBUGGER
61 #include <linux/kdb.h>
63 /* stuff for debugger support */
65 EXPORT_SYMBOL(acpi_in_debugger
);
67 extern char line_buf
[80];
68 #endif /*ENABLE_DEBUGGER */
70 static unsigned int acpi_irq_irq
;
71 static acpi_osd_handler acpi_irq_handler
;
72 static void *acpi_irq_context
;
73 static struct workqueue_struct
*kacpid_wq
;
75 static void __init
acpi_request_region (struct acpi_generic_address
*addr
,
76 unsigned int length
, char *desc
)
80 if (!addr
->address
|| !length
)
83 if (addr
->space_id
== ACPI_ADR_SPACE_SYSTEM_IO
)
84 res
= request_region(addr
->address
, length
, desc
);
85 else if (addr
->space_id
== ACPI_ADR_SPACE_SYSTEM_MEMORY
)
86 res
= request_mem_region(addr
->address
, length
, desc
);
89 static int __init
acpi_reserve_resources(void)
91 acpi_request_region(&acpi_gbl_FADT
.xpm1a_event_block
, acpi_gbl_FADT
.pm1_event_length
,
94 acpi_request_region(&acpi_gbl_FADT
.xpm1b_event_block
, acpi_gbl_FADT
.pm1_event_length
,
97 acpi_request_region(&acpi_gbl_FADT
.xpm1a_control_block
, acpi_gbl_FADT
.pm1_control_length
,
100 acpi_request_region(&acpi_gbl_FADT
.xpm1b_control_block
, acpi_gbl_FADT
.pm1_control_length
,
101 "ACPI PM1b_CNT_BLK");
103 if (acpi_gbl_FADT
.pm_timer_length
== 4)
104 acpi_request_region(&acpi_gbl_FADT
.xpm_timer_block
, 4, "ACPI PM_TMR");
106 acpi_request_region(&acpi_gbl_FADT
.xpm2_control_block
, acpi_gbl_FADT
.pm2_control_length
,
109 /* Length of GPE blocks must be a non-negative multiple of 2 */
111 if (!(acpi_gbl_FADT
.gpe0_block_length
& 0x1))
112 acpi_request_region(&acpi_gbl_FADT
.xgpe0_block
,
113 acpi_gbl_FADT
.gpe0_block_length
, "ACPI GPE0_BLK");
115 if (!(acpi_gbl_FADT
.gpe1_block_length
& 0x1))
116 acpi_request_region(&acpi_gbl_FADT
.xgpe1_block
,
117 acpi_gbl_FADT
.gpe1_block_length
, "ACPI GPE1_BLK");
121 device_initcall(acpi_reserve_resources
);
123 acpi_status
acpi_os_initialize(void)
128 acpi_status
acpi_os_initialize1(void)
131 * Initialize PCI configuration space access, as we'll need to access
132 * it while walking the namespace (bus 0 and root bridges w/ _BBNs).
135 printk(KERN_ERR PREFIX
136 "Access to PCI configuration space unavailable\n");
137 return AE_NULL_ENTRY
;
139 kacpid_wq
= create_singlethread_workqueue("kacpid");
145 acpi_status
acpi_os_terminate(void)
147 if (acpi_irq_handler
) {
148 acpi_os_remove_interrupt_handler(acpi_irq_irq
,
152 destroy_workqueue(kacpid_wq
);
157 void acpi_os_printf(const char *fmt
, ...)
161 acpi_os_vprintf(fmt
, args
);
165 EXPORT_SYMBOL(acpi_os_printf
);
167 void acpi_os_vprintf(const char *fmt
, va_list args
)
169 static char buffer
[512];
171 vsprintf(buffer
, fmt
, args
);
173 #ifdef ENABLE_DEBUGGER
174 if (acpi_in_debugger
) {
175 kdb_printf("%s", buffer
);
177 printk("%s", buffer
);
180 printk("%s", buffer
);
184 acpi_physical_address __init
acpi_os_get_root_pointer(void)
187 if (efi
.acpi20
!= EFI_INVALID_TABLE_ADDR
)
189 else if (efi
.acpi
!= EFI_INVALID_TABLE_ADDR
)
192 printk(KERN_ERR PREFIX
193 "System description tables not found\n");
197 return acpi_find_rsdp();
200 void __iomem
*acpi_os_map_memory(acpi_physical_address phys
, acpi_size size
)
202 if (phys
> ULONG_MAX
) {
203 printk(KERN_ERR PREFIX
"Cannot map memory that high\n");
206 if (acpi_gbl_permanent_mmap
)
208 * ioremap checks to ensure this is in reserved space
210 return ioremap((unsigned long)phys
, size
);
212 return __acpi_map_table((unsigned long)phys
, size
);
214 EXPORT_SYMBOL_GPL(acpi_os_map_memory
);
216 void acpi_os_unmap_memory(void __iomem
* virt
, acpi_size size
)
218 if (acpi_gbl_permanent_mmap
) {
222 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory
);
224 #ifdef ACPI_FUTURE_USAGE
226 acpi_os_get_physical_address(void *virt
, acpi_physical_address
* phys
)
229 return AE_BAD_PARAMETER
;
231 *phys
= virt_to_phys(virt
);
237 #define ACPI_MAX_OVERRIDE_LEN 100
239 static char acpi_os_name
[ACPI_MAX_OVERRIDE_LEN
];
242 acpi_os_predefined_override(const struct acpi_predefined_names
*init_val
,
243 acpi_string
* new_val
)
245 if (!init_val
|| !new_val
)
246 return AE_BAD_PARAMETER
;
249 if (!memcmp(init_val
->name
, "_OS_", 4) && strlen(acpi_os_name
)) {
250 printk(KERN_INFO PREFIX
"Overriding _OS definition to '%s'\n",
252 *new_val
= acpi_os_name
;
259 acpi_os_table_override(struct acpi_table_header
* existing_table
,
260 struct acpi_table_header
** new_table
)
262 if (!existing_table
|| !new_table
)
263 return AE_BAD_PARAMETER
;
265 #ifdef CONFIG_ACPI_CUSTOM_DSDT
266 if (strncmp(existing_table
->signature
, "DSDT", 4) == 0)
267 *new_table
= (struct acpi_table_header
*)AmlCode
;
276 static irqreturn_t
acpi_irq(int irq
, void *dev_id
)
278 return (*acpi_irq_handler
) (acpi_irq_context
) ? IRQ_HANDLED
: IRQ_NONE
;
282 acpi_os_install_interrupt_handler(u32 gsi
, acpi_osd_handler handler
,
288 * Ignore the GSI from the core, and use the value in our copy of the
289 * FADT. It may not be the same if an interrupt source override exists
292 gsi
= acpi_gbl_FADT
.sci_interrupt
;
293 if (acpi_gsi_to_irq(gsi
, &irq
) < 0) {
294 printk(KERN_ERR PREFIX
"SCI (ACPI GSI %d) not registered\n",
299 acpi_irq_handler
= handler
;
300 acpi_irq_context
= context
;
301 if (request_irq(irq
, acpi_irq
, IRQF_SHARED
, "acpi", acpi_irq
)) {
302 printk(KERN_ERR PREFIX
"SCI (IRQ%d) allocation failed\n", irq
);
303 return AE_NOT_ACQUIRED
;
310 acpi_status
acpi_os_remove_interrupt_handler(u32 irq
, acpi_osd_handler handler
)
313 free_irq(irq
, acpi_irq
);
314 acpi_irq_handler
= NULL
;
322 * Running in interpreter thread context, safe to sleep
325 void acpi_os_sleep(acpi_integer ms
)
327 schedule_timeout_interruptible(msecs_to_jiffies(ms
));
330 EXPORT_SYMBOL(acpi_os_sleep
);
332 void acpi_os_stall(u32 us
)
340 touch_nmi_watchdog();
345 EXPORT_SYMBOL(acpi_os_stall
);
348 * Support ACPI 3.0 AML Timer operand
349 * Returns 64-bit free-running, monotonically increasing timer
350 * with 100ns granularity
352 u64
acpi_os_get_timer(void)
357 /* TBD: use HPET if available */
360 #ifdef CONFIG_X86_PM_TIMER
361 /* TBD: default to PM timer if HPET was not available */
364 printk(KERN_ERR PREFIX
"acpi_os_get_timer() TBD\n");
369 acpi_status
acpi_os_read_port(acpi_io_address port
, u32
* value
, u32 width
)
378 *(u8
*) value
= inb(port
);
381 *(u16
*) value
= inw(port
);
384 *(u32
*) value
= inl(port
);
393 EXPORT_SYMBOL(acpi_os_read_port
);
395 acpi_status
acpi_os_write_port(acpi_io_address port
, u32 value
, u32 width
)
414 EXPORT_SYMBOL(acpi_os_write_port
);
417 acpi_os_read_memory(acpi_physical_address phys_addr
, u32
* value
, u32 width
)
420 void __iomem
*virt_addr
;
422 virt_addr
= ioremap(phys_addr
, width
);
428 *(u8
*) value
= readb(virt_addr
);
431 *(u16
*) value
= readw(virt_addr
);
434 *(u32
*) value
= readl(virt_addr
);
446 acpi_os_write_memory(acpi_physical_address phys_addr
, u32 value
, u32 width
)
448 void __iomem
*virt_addr
;
450 virt_addr
= ioremap(phys_addr
, width
);
454 writeb(value
, virt_addr
);
457 writew(value
, virt_addr
);
460 writel(value
, virt_addr
);
472 acpi_os_read_pci_configuration(struct acpi_pci_id
* pci_id
, u32 reg
,
473 void *value
, u32 width
)
478 return AE_BAD_PARAMETER
;
494 BUG_ON(!raw_pci_ops
);
496 result
= raw_pci_ops
->read(pci_id
->segment
, pci_id
->bus
,
497 PCI_DEVFN(pci_id
->device
, pci_id
->function
),
500 return (result
? AE_ERROR
: AE_OK
);
503 EXPORT_SYMBOL(acpi_os_read_pci_configuration
);
506 acpi_os_write_pci_configuration(struct acpi_pci_id
* pci_id
, u32 reg
,
507 acpi_integer value
, u32 width
)
525 BUG_ON(!raw_pci_ops
);
527 result
= raw_pci_ops
->write(pci_id
->segment
, pci_id
->bus
,
528 PCI_DEVFN(pci_id
->device
, pci_id
->function
),
531 return (result
? AE_ERROR
: AE_OK
);
534 /* TODO: Change code to take advantage of driver model more */
535 static void acpi_os_derive_pci_id_2(acpi_handle rhandle
, /* upper bound */
536 acpi_handle chandle
, /* current node */
537 struct acpi_pci_id
**id
,
538 int *is_bridge
, u8
* bus_number
)
541 struct acpi_pci_id
*pci_id
= *id
;
544 acpi_object_type type
;
547 acpi_get_parent(chandle
, &handle
);
548 if (handle
!= rhandle
) {
549 acpi_os_derive_pci_id_2(rhandle
, handle
, &pci_id
, is_bridge
,
552 status
= acpi_get_type(handle
, &type
);
553 if ((ACPI_FAILURE(status
)) || (type
!= ACPI_TYPE_DEVICE
))
557 acpi_evaluate_integer(handle
, METHOD_NAME__ADR
, NULL
,
559 if (ACPI_SUCCESS(status
)) {
560 pci_id
->device
= ACPI_HIWORD(ACPI_LODWORD(temp
));
561 pci_id
->function
= ACPI_LOWORD(ACPI_LODWORD(temp
));
564 pci_id
->bus
= *bus_number
;
566 /* any nicer way to get bus number of bridge ? */
568 acpi_os_read_pci_configuration(pci_id
, 0x0e, &tu8
,
570 if (ACPI_SUCCESS(status
)
571 && ((tu8
& 0x7f) == 1 || (tu8
& 0x7f) == 2)) {
573 acpi_os_read_pci_configuration(pci_id
, 0x18,
575 if (!ACPI_SUCCESS(status
)) {
576 /* Certainly broken... FIX ME */
582 acpi_os_read_pci_configuration(pci_id
, 0x19,
584 if (ACPI_SUCCESS(status
)) {
593 void acpi_os_derive_pci_id(acpi_handle rhandle
, /* upper bound */
594 acpi_handle chandle
, /* current node */
595 struct acpi_pci_id
**id
)
598 u8 bus_number
= (*id
)->bus
;
600 acpi_os_derive_pci_id_2(rhandle
, chandle
, id
, &is_bridge
, &bus_number
);
603 static void acpi_os_execute_deferred(struct work_struct
*work
)
605 struct acpi_os_dpc
*dpc
= container_of(work
, struct acpi_os_dpc
, work
);
608 printk(KERN_ERR PREFIX
"Invalid (NULL) context\n");
612 dpc
->function(dpc
->context
);
619 /*******************************************************************************
621 * FUNCTION: acpi_os_execute
623 * PARAMETERS: Type - Type of the callback
624 * Function - Function to be executed
625 * Context - Function parameters
629 * DESCRIPTION: Depending on type, either queues function for deferred execution or
630 * immediately executes function on a separate thread.
632 ******************************************************************************/
634 acpi_status
acpi_os_execute(acpi_execute_type type
,
635 acpi_osd_exec_callback function
, void *context
)
637 acpi_status status
= AE_OK
;
638 struct acpi_os_dpc
*dpc
;
640 ACPI_FUNCTION_TRACE("os_queue_for_execution");
642 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
,
643 "Scheduling function [%p(%p)] for deferred execution.\n",
647 return_ACPI_STATUS(AE_BAD_PARAMETER
);
650 * Allocate/initialize DPC structure. Note that this memory will be
651 * freed by the callee. The kernel handles the work_struct list in a
652 * way that allows us to also free its memory inside the callee.
653 * Because we may want to schedule several tasks with different
654 * parameters we can't use the approach some kernel code uses of
655 * having a static work_struct.
658 dpc
= kmalloc(sizeof(struct acpi_os_dpc
), GFP_ATOMIC
);
660 return_ACPI_STATUS(AE_NO_MEMORY
);
662 dpc
->function
= function
;
663 dpc
->context
= context
;
665 INIT_WORK(&dpc
->work
, acpi_os_execute_deferred
);
666 if (!queue_work(kacpid_wq
, &dpc
->work
)) {
667 ACPI_DEBUG_PRINT((ACPI_DB_ERROR
,
668 "Call to queue_work() failed.\n"));
673 return_ACPI_STATUS(status
);
676 EXPORT_SYMBOL(acpi_os_execute
);
678 void acpi_os_wait_events_complete(void *context
)
680 flush_workqueue(kacpid_wq
);
683 EXPORT_SYMBOL(acpi_os_wait_events_complete
);
686 * Allocate the memory for a spinlock and initialize it.
688 acpi_status
acpi_os_create_lock(acpi_spinlock
* handle
)
690 spin_lock_init(*handle
);
696 * Deallocate the memory for a spinlock.
698 void acpi_os_delete_lock(acpi_spinlock handle
)
704 acpi_os_create_semaphore(u32 max_units
, u32 initial_units
, acpi_handle
* handle
)
706 struct semaphore
*sem
= NULL
;
709 sem
= acpi_os_allocate(sizeof(struct semaphore
));
712 memset(sem
, 0, sizeof(struct semaphore
));
714 sema_init(sem
, initial_units
);
716 *handle
= (acpi_handle
*) sem
;
718 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Creating semaphore[%p|%d].\n",
719 *handle
, initial_units
));
724 EXPORT_SYMBOL(acpi_os_create_semaphore
);
727 * TODO: A better way to delete semaphores? Linux doesn't have a
728 * 'delete_semaphore()' function -- may result in an invalid
729 * pointer dereference for non-synchronized consumers. Should
730 * we at least check for blocked threads and signal/cancel them?
733 acpi_status
acpi_os_delete_semaphore(acpi_handle handle
)
735 struct semaphore
*sem
= (struct semaphore
*)handle
;
739 return AE_BAD_PARAMETER
;
741 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Deleting semaphore[%p].\n", handle
));
749 EXPORT_SYMBOL(acpi_os_delete_semaphore
);
752 * TODO: The kernel doesn't have a 'down_timeout' function -- had to
753 * improvise. The process is to sleep for one scheduler quantum
754 * until the semaphore becomes available. Downside is that this
755 * may result in starvation for timeout-based waits when there's
756 * lots of semaphore activity.
758 * TODO: Support for units > 1?
760 acpi_status
acpi_os_wait_semaphore(acpi_handle handle
, u32 units
, u16 timeout
)
762 acpi_status status
= AE_OK
;
763 struct semaphore
*sem
= (struct semaphore
*)handle
;
767 if (!sem
|| (units
< 1))
768 return AE_BAD_PARAMETER
;
773 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Waiting for semaphore[%p|%d|%d]\n",
774 handle
, units
, timeout
));
777 * This can be called during resume with interrupts off.
778 * Like boot-time, we should be single threaded and will
779 * always get the lock if we try -- timeout or not.
780 * If this doesn't succeed, then we will oops courtesy of
781 * might_sleep() in down().
783 if (!down_trylock(sem
))
790 * A zero timeout value indicates that we shouldn't wait - just
791 * acquire the semaphore if available otherwise return AE_TIME
792 * (a.k.a. 'would block').
795 if (down_trylock(sem
))
803 case ACPI_WAIT_FOREVER
:
812 // TODO: A better timeout algorithm?
815 static const int quantum_ms
= 1000 / HZ
;
817 ret
= down_trylock(sem
);
818 for (i
= timeout
; (i
> 0 && ret
!= 0); i
-= quantum_ms
) {
819 schedule_timeout_interruptible(1);
820 ret
= down_trylock(sem
);
829 if (ACPI_FAILURE(status
)) {
830 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
,
831 "Failed to acquire semaphore[%p|%d|%d], %s",
832 handle
, units
, timeout
,
833 acpi_format_exception(status
)));
835 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
,
836 "Acquired semaphore[%p|%d|%d]", handle
,
843 EXPORT_SYMBOL(acpi_os_wait_semaphore
);
846 * TODO: Support for units > 1?
848 acpi_status
acpi_os_signal_semaphore(acpi_handle handle
, u32 units
)
850 struct semaphore
*sem
= (struct semaphore
*)handle
;
853 if (!sem
|| (units
< 1))
854 return AE_BAD_PARAMETER
;
859 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Signaling semaphore[%p|%d]\n", handle
,
867 EXPORT_SYMBOL(acpi_os_signal_semaphore
);
869 #ifdef ACPI_FUTURE_USAGE
870 u32
acpi_os_get_line(char *buffer
)
873 #ifdef ENABLE_DEBUGGER
874 if (acpi_in_debugger
) {
877 kdb_read(buffer
, sizeof(line_buf
));
879 /* remove the CR kdb includes */
880 chars
= strlen(buffer
) - 1;
881 buffer
[chars
] = '\0';
887 #endif /* ACPI_FUTURE_USAGE */
889 acpi_status
acpi_os_signal(u32 function
, void *info
)
892 case ACPI_SIGNAL_FATAL
:
893 printk(KERN_ERR PREFIX
"Fatal opcode executed\n");
895 case ACPI_SIGNAL_BREAKPOINT
:
898 * ACPI spec. says to treat it as a NOP unless
899 * you are debugging. So if/when we integrate
900 * AML debugger into the kernel debugger its
901 * hook will go here. But until then it is
902 * not useful to print anything on breakpoints.
912 EXPORT_SYMBOL(acpi_os_signal
);
914 static int __init
acpi_os_name_setup(char *str
)
916 char *p
= acpi_os_name
;
917 int count
= ACPI_MAX_OVERRIDE_LEN
- 1;
922 for (; count
-- && str
&& *str
; str
++) {
923 if (isalnum(*str
) || *str
== ' ' || *str
== ':')
925 else if (*str
== '\'' || *str
== '"')
936 __setup("acpi_os_name=", acpi_os_name_setup
);
940 * empty string disables _OSI
941 * TBD additional string adds to _OSI
943 static int __init
acpi_osi_setup(char *str
)
945 if (str
== NULL
|| *str
== '\0') {
946 printk(KERN_INFO PREFIX
"_OSI method disabled\n");
947 acpi_gbl_create_osi_method
= FALSE
;
950 printk(KERN_ERR PREFIX
"_OSI additional string ignored -- %s\n",
957 __setup("acpi_osi=", acpi_osi_setup
);
959 /* enable serialization to combat AE_ALREADY_EXISTS errors */
960 static int __init
acpi_serialize_setup(char *str
)
962 printk(KERN_INFO PREFIX
"serialize enabled\n");
964 acpi_gbl_all_methods_serialized
= TRUE
;
969 __setup("acpi_serialize", acpi_serialize_setup
);
972 * Wake and Run-Time GPES are expected to be separate.
973 * We disable wake-GPEs at run-time to prevent spurious
976 * However, if a system exists that shares Wake and
977 * Run-time events on the same GPE this flag is available
978 * to tell Linux to keep the wake-time GPEs enabled at run-time.
980 static int __init
acpi_wake_gpes_always_on_setup(char *str
)
982 printk(KERN_INFO PREFIX
"wake GPEs not disabled\n");
984 acpi_gbl_leave_wake_gpes_disabled
= FALSE
;
989 __setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_setup
);
992 * max_cstate is defined in the base kernel so modules can
993 * change it w/o depending on the state of the processor module.
995 unsigned int max_cstate
= ACPI_PROCESSOR_MAX_POWER
;
997 EXPORT_SYMBOL(max_cstate
);
1000 * Acquire a spinlock.
1002 * handle is a pointer to the spinlock_t.
1005 acpi_cpu_flags
acpi_os_acquire_lock(acpi_spinlock lockp
)
1007 acpi_cpu_flags flags
;
1008 spin_lock_irqsave(lockp
, flags
);
1013 * Release a spinlock. See above.
1016 void acpi_os_release_lock(acpi_spinlock lockp
, acpi_cpu_flags flags
)
1018 spin_unlock_irqrestore(lockp
, flags
);
1021 #ifndef ACPI_USE_LOCAL_CACHE
1023 /*******************************************************************************
1025 * FUNCTION: acpi_os_create_cache
1027 * PARAMETERS: name - Ascii name for the cache
1028 * size - Size of each cached object
1029 * depth - Maximum depth of the cache (in objects) <ignored>
1030 * cache - Where the new cache object is returned
1034 * DESCRIPTION: Create a cache object
1036 ******************************************************************************/
1039 acpi_os_create_cache(char *name
, u16 size
, u16 depth
, acpi_cache_t
** cache
)
1041 *cache
= kmem_cache_create(name
, size
, 0, 0, NULL
, NULL
);
1048 /*******************************************************************************
1050 * FUNCTION: acpi_os_purge_cache
1052 * PARAMETERS: Cache - Handle to cache object
1056 * DESCRIPTION: Free all objects within the requested cache.
1058 ******************************************************************************/
1060 acpi_status
acpi_os_purge_cache(acpi_cache_t
* cache
)
1062 kmem_cache_shrink(cache
);
1066 /*******************************************************************************
1068 * FUNCTION: acpi_os_delete_cache
1070 * PARAMETERS: Cache - Handle to cache object
1074 * DESCRIPTION: Free all objects within the requested cache and delete the
1077 ******************************************************************************/
1079 acpi_status
acpi_os_delete_cache(acpi_cache_t
* cache
)
1081 kmem_cache_destroy(cache
);
1085 /*******************************************************************************
1087 * FUNCTION: acpi_os_release_object
1089 * PARAMETERS: Cache - Handle to cache object
1090 * Object - The object to be released
1094 * DESCRIPTION: Release an object to the specified cache. If cache is full,
1095 * the object is deleted.
1097 ******************************************************************************/
1099 acpi_status
acpi_os_release_object(acpi_cache_t
* cache
, void *object
)
1101 kmem_cache_free(cache
, object
);
1105 /******************************************************************************
1107 * FUNCTION: acpi_os_validate_interface
1109 * PARAMETERS: interface - Requested interface to be validated
1111 * RETURN: AE_OK if interface is supported, AE_SUPPORT otherwise
1113 * DESCRIPTION: Match an interface string to the interfaces supported by the
1114 * host. Strings originate from an AML call to the _OSI method.
1116 *****************************************************************************/
1119 acpi_os_validate_interface (char *interface
)
1126 /******************************************************************************
1128 * FUNCTION: acpi_os_validate_address
1130 * PARAMETERS: space_id - ACPI space ID
1131 * address - Physical address
1132 * length - Address length
1134 * RETURN: AE_OK if address/length is valid for the space_id. Otherwise,
1135 * should return AE_AML_ILLEGAL_ADDRESS.
1137 * DESCRIPTION: Validate a system address via the host OS. Used to validate
1138 * the addresses accessed by AML operation regions.
1140 *****************************************************************************/
1143 acpi_os_validate_address (
1145 acpi_physical_address address
,