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>
7 * Copyright (c) 2008 Intel Corporation
8 * Author: Matthew Wilcox <willy@linux.intel.com>
10 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 #include <linux/module.h>
27 #include <linux/kernel.h>
28 #include <linux/slab.h>
30 #include <linux/highmem.h>
31 #include <linux/pci.h>
32 #include <linux/interrupt.h>
33 #include <linux/kmod.h>
34 #include <linux/delay.h>
35 #include <linux/workqueue.h>
36 #include <linux/nmi.h>
37 #include <linux/acpi.h>
38 #include <linux/efi.h>
39 #include <linux/ioport.h>
40 #include <linux/list.h>
41 #include <linux/jiffies.h>
42 #include <linux/semaphore.h>
45 #include <asm/uaccess.h>
46 #include <linux/io-64-nonatomic-lo-hi.h>
50 #define _COMPONENT ACPI_OS_SERVICES
51 ACPI_MODULE_NAME("osl");
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
);
69 #endif /*ENABLE_DEBUGGER */
71 static int (*__acpi_os_prepare_sleep
)(u8 sleep_state
, u32 pm1a_ctrl
,
73 static int (*__acpi_os_prepare_extended_sleep
)(u8 sleep_state
, u32 val_a
,
76 static acpi_osd_handler acpi_irq_handler
;
77 static void *acpi_irq_context
;
78 static struct workqueue_struct
*kacpid_wq
;
79 static struct workqueue_struct
*kacpi_notify_wq
;
80 static struct workqueue_struct
*kacpi_hotplug_wq
;
81 static bool acpi_os_initialized
;
82 unsigned int acpi_sci_irq
= INVALID_ACPI_IRQ
;
85 * This list of permanent mappings is for memory that may be accessed from
86 * interrupt context, where we can't do the ioremap().
89 struct list_head list
;
91 acpi_physical_address phys
;
93 unsigned long refcount
;
96 static LIST_HEAD(acpi_ioremaps
);
97 static DEFINE_MUTEX(acpi_ioremap_lock
);
99 static void __init
acpi_osi_setup_late(void);
102 * The story of _OSI(Linux)
104 * From pre-history through Linux-2.6.22,
105 * Linux responded TRUE upon a BIOS OSI(Linux) query.
107 * Unfortunately, reference BIOS writers got wind of this
108 * and put OSI(Linux) in their example code, quickly exposing
109 * this string as ill-conceived and opening the door to
110 * an un-bounded number of BIOS incompatibilities.
112 * For example, OSI(Linux) was used on resume to re-POST a
113 * video card on one system, because Linux at that time
114 * could not do a speedy restore in its native driver.
115 * But then upon gaining quick native restore capability,
116 * Linux has no way to tell the BIOS to skip the time-consuming
117 * POST -- putting Linux at a permanent performance disadvantage.
118 * On another system, the BIOS writer used OSI(Linux)
119 * to infer native OS support for IPMI! On other systems,
120 * OSI(Linux) simply got in the way of Linux claiming to
121 * be compatible with other operating systems, exposing
122 * BIOS issues such as skipped device initialization.
124 * So "Linux" turned out to be a really poor chose of
125 * OSI string, and from Linux-2.6.23 onward we respond FALSE.
127 * BIOS writers should NOT query _OSI(Linux) on future systems.
128 * Linux will complain on the console when it sees it, and return FALSE.
129 * To get Linux to return TRUE for your system will require
130 * a kernel source update to add a DMI entry,
131 * or boot with "acpi_osi=Linux"
134 static struct osi_linux
{
135 unsigned int enable
:1;
137 unsigned int cmdline
:1;
138 unsigned int default_disabling
:1;
139 } osi_linux
= {0, 0, 0, 0};
141 static u32
acpi_osi_handler(acpi_string interface
, u32 supported
)
143 if (!strcmp("Linux", interface
)) {
145 printk_once(KERN_NOTICE FW_BUG PREFIX
146 "BIOS _OSI(Linux) query %s%s\n",
147 osi_linux
.enable
? "honored" : "ignored",
148 osi_linux
.cmdline
? " via cmdline" :
149 osi_linux
.dmi
? " via DMI" : "");
152 if (!strcmp("Darwin", interface
)) {
154 * Apple firmware will behave poorly if it receives positive
155 * answers to "Darwin" and any other OS. Respond positively
156 * to Darwin and then disable all other vendor strings.
158 acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS
);
159 supported
= ACPI_UINT32_MAX
;
165 static void __init
acpi_request_region (struct acpi_generic_address
*gas
,
166 unsigned int length
, char *desc
)
170 /* Handle possible alignment issues */
171 memcpy(&addr
, &gas
->address
, sizeof(addr
));
172 if (!addr
|| !length
)
175 /* Resources are never freed */
176 if (gas
->space_id
== ACPI_ADR_SPACE_SYSTEM_IO
)
177 request_region(addr
, length
, desc
);
178 else if (gas
->space_id
== ACPI_ADR_SPACE_SYSTEM_MEMORY
)
179 request_mem_region(addr
, length
, desc
);
182 static int __init
acpi_reserve_resources(void)
184 acpi_request_region(&acpi_gbl_FADT
.xpm1a_event_block
, acpi_gbl_FADT
.pm1_event_length
,
185 "ACPI PM1a_EVT_BLK");
187 acpi_request_region(&acpi_gbl_FADT
.xpm1b_event_block
, acpi_gbl_FADT
.pm1_event_length
,
188 "ACPI PM1b_EVT_BLK");
190 acpi_request_region(&acpi_gbl_FADT
.xpm1a_control_block
, acpi_gbl_FADT
.pm1_control_length
,
191 "ACPI PM1a_CNT_BLK");
193 acpi_request_region(&acpi_gbl_FADT
.xpm1b_control_block
, acpi_gbl_FADT
.pm1_control_length
,
194 "ACPI PM1b_CNT_BLK");
196 if (acpi_gbl_FADT
.pm_timer_length
== 4)
197 acpi_request_region(&acpi_gbl_FADT
.xpm_timer_block
, 4, "ACPI PM_TMR");
199 acpi_request_region(&acpi_gbl_FADT
.xpm2_control_block
, acpi_gbl_FADT
.pm2_control_length
,
202 /* Length of GPE blocks must be a non-negative multiple of 2 */
204 if (!(acpi_gbl_FADT
.gpe0_block_length
& 0x1))
205 acpi_request_region(&acpi_gbl_FADT
.xgpe0_block
,
206 acpi_gbl_FADT
.gpe0_block_length
, "ACPI GPE0_BLK");
208 if (!(acpi_gbl_FADT
.gpe1_block_length
& 0x1))
209 acpi_request_region(&acpi_gbl_FADT
.xgpe1_block
,
210 acpi_gbl_FADT
.gpe1_block_length
, "ACPI GPE1_BLK");
214 fs_initcall_sync(acpi_reserve_resources
);
216 void acpi_os_printf(const char *fmt
, ...)
220 acpi_os_vprintf(fmt
, args
);
223 EXPORT_SYMBOL(acpi_os_printf
);
225 void acpi_os_vprintf(const char *fmt
, va_list args
)
227 static char buffer
[512];
229 vsprintf(buffer
, fmt
, args
);
231 #ifdef ENABLE_DEBUGGER
232 if (acpi_in_debugger
) {
233 kdb_printf("%s", buffer
);
235 printk(KERN_CONT
"%s", buffer
);
238 if (acpi_debugger_write_log(buffer
) < 0)
239 printk(KERN_CONT
"%s", buffer
);
244 static unsigned long acpi_rsdp
;
245 static int __init
setup_acpi_rsdp(char *arg
)
247 if (kstrtoul(arg
, 16, &acpi_rsdp
))
251 early_param("acpi_rsdp", setup_acpi_rsdp
);
254 acpi_physical_address __init
acpi_os_get_root_pointer(void)
261 if (efi_enabled(EFI_CONFIG_TABLES
)) {
262 if (efi
.acpi20
!= EFI_INVALID_TABLE_ADDR
)
264 else if (efi
.acpi
!= EFI_INVALID_TABLE_ADDR
)
267 printk(KERN_ERR PREFIX
268 "System description tables not found\n");
271 } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP
)) {
272 acpi_physical_address pa
= 0;
274 acpi_find_root_pointer(&pa
);
281 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
282 static struct acpi_ioremap
*
283 acpi_map_lookup(acpi_physical_address phys
, acpi_size size
)
285 struct acpi_ioremap
*map
;
287 list_for_each_entry_rcu(map
, &acpi_ioremaps
, list
)
288 if (map
->phys
<= phys
&&
289 phys
+ size
<= map
->phys
+ map
->size
)
295 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
296 static void __iomem
*
297 acpi_map_vaddr_lookup(acpi_physical_address phys
, unsigned int size
)
299 struct acpi_ioremap
*map
;
301 map
= acpi_map_lookup(phys
, size
);
303 return map
->virt
+ (phys
- map
->phys
);
308 void __iomem
*acpi_os_get_iomem(acpi_physical_address phys
, unsigned int size
)
310 struct acpi_ioremap
*map
;
311 void __iomem
*virt
= NULL
;
313 mutex_lock(&acpi_ioremap_lock
);
314 map
= acpi_map_lookup(phys
, size
);
316 virt
= map
->virt
+ (phys
- map
->phys
);
319 mutex_unlock(&acpi_ioremap_lock
);
322 EXPORT_SYMBOL_GPL(acpi_os_get_iomem
);
324 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
325 static struct acpi_ioremap
*
326 acpi_map_lookup_virt(void __iomem
*virt
, acpi_size size
)
328 struct acpi_ioremap
*map
;
330 list_for_each_entry_rcu(map
, &acpi_ioremaps
, list
)
331 if (map
->virt
<= virt
&&
332 virt
+ size
<= map
->virt
+ map
->size
)
338 #if defined(CONFIG_IA64) || defined(CONFIG_ARM64)
339 /* ioremap will take care of cache attributes */
340 #define should_use_kmap(pfn) 0
342 #define should_use_kmap(pfn) page_is_ram(pfn)
345 static void __iomem
*acpi_map(acpi_physical_address pg_off
, unsigned long pg_sz
)
349 pfn
= pg_off
>> PAGE_SHIFT
;
350 if (should_use_kmap(pfn
)) {
351 if (pg_sz
> PAGE_SIZE
)
353 return (void __iomem __force
*)kmap(pfn_to_page(pfn
));
355 return acpi_os_ioremap(pg_off
, pg_sz
);
358 static void acpi_unmap(acpi_physical_address pg_off
, void __iomem
*vaddr
)
362 pfn
= pg_off
>> PAGE_SHIFT
;
363 if (should_use_kmap(pfn
))
364 kunmap(pfn_to_page(pfn
));
370 * acpi_os_map_iomem - Get a virtual address for a given physical address range.
371 * @phys: Start of the physical address range to map.
372 * @size: Size of the physical address range to map.
374 * Look up the given physical address range in the list of existing ACPI memory
375 * mappings. If found, get a reference to it and return a pointer to it (its
376 * virtual address). If not found, map it, add it to that list and return a
379 * During early init (when acpi_gbl_permanent_mmap has not been set yet) this
380 * routine simply calls __acpi_map_table() to get the job done.
382 void __iomem
*__init_refok
383 acpi_os_map_iomem(acpi_physical_address phys
, acpi_size size
)
385 struct acpi_ioremap
*map
;
387 acpi_physical_address pg_off
;
390 if (phys
> ULONG_MAX
) {
391 printk(KERN_ERR PREFIX
"Cannot map memory that high\n");
395 if (!acpi_gbl_permanent_mmap
)
396 return __acpi_map_table((unsigned long)phys
, size
);
398 mutex_lock(&acpi_ioremap_lock
);
399 /* Check if there's a suitable mapping already. */
400 map
= acpi_map_lookup(phys
, size
);
406 map
= kzalloc(sizeof(*map
), GFP_KERNEL
);
408 mutex_unlock(&acpi_ioremap_lock
);
412 pg_off
= round_down(phys
, PAGE_SIZE
);
413 pg_sz
= round_up(phys
+ size
, PAGE_SIZE
) - pg_off
;
414 virt
= acpi_map(pg_off
, pg_sz
);
416 mutex_unlock(&acpi_ioremap_lock
);
421 INIT_LIST_HEAD(&map
->list
);
427 list_add_tail_rcu(&map
->list
, &acpi_ioremaps
);
430 mutex_unlock(&acpi_ioremap_lock
);
431 return map
->virt
+ (phys
- map
->phys
);
433 EXPORT_SYMBOL_GPL(acpi_os_map_iomem
);
436 acpi_os_map_memory(acpi_physical_address phys
, acpi_size size
)
438 return (void *)acpi_os_map_iomem(phys
, size
);
440 EXPORT_SYMBOL_GPL(acpi_os_map_memory
);
442 static void acpi_os_drop_map_ref(struct acpi_ioremap
*map
)
444 if (!--map
->refcount
)
445 list_del_rcu(&map
->list
);
448 static void acpi_os_map_cleanup(struct acpi_ioremap
*map
)
450 if (!map
->refcount
) {
451 synchronize_rcu_expedited();
452 acpi_unmap(map
->phys
, map
->virt
);
458 * acpi_os_unmap_iomem - Drop a memory mapping reference.
459 * @virt: Start of the address range to drop a reference to.
460 * @size: Size of the address range to drop a reference to.
462 * Look up the given virtual address range in the list of existing ACPI memory
463 * mappings, drop a reference to it and unmap it if there are no more active
466 * During early init (when acpi_gbl_permanent_mmap has not been set yet) this
467 * routine simply calls __acpi_unmap_table() to get the job done. Since
468 * __acpi_unmap_table() is an __init function, the __ref annotation is needed
471 void __ref
acpi_os_unmap_iomem(void __iomem
*virt
, acpi_size size
)
473 struct acpi_ioremap
*map
;
475 if (!acpi_gbl_permanent_mmap
) {
476 __acpi_unmap_table(virt
, size
);
480 mutex_lock(&acpi_ioremap_lock
);
481 map
= acpi_map_lookup_virt(virt
, size
);
483 mutex_unlock(&acpi_ioremap_lock
);
484 WARN(true, PREFIX
"%s: bad address %p\n", __func__
, virt
);
487 acpi_os_drop_map_ref(map
);
488 mutex_unlock(&acpi_ioremap_lock
);
490 acpi_os_map_cleanup(map
);
492 EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem
);
494 void __ref
acpi_os_unmap_memory(void *virt
, acpi_size size
)
496 return acpi_os_unmap_iomem((void __iomem
*)virt
, size
);
498 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory
);
500 void __init
early_acpi_os_unmap_memory(void __iomem
*virt
, acpi_size size
)
502 if (!acpi_gbl_permanent_mmap
)
503 __acpi_unmap_table(virt
, size
);
506 int acpi_os_map_generic_address(struct acpi_generic_address
*gas
)
511 if (gas
->space_id
!= ACPI_ADR_SPACE_SYSTEM_MEMORY
)
514 /* Handle possible alignment issues */
515 memcpy(&addr
, &gas
->address
, sizeof(addr
));
516 if (!addr
|| !gas
->bit_width
)
519 virt
= acpi_os_map_iomem(addr
, gas
->bit_width
/ 8);
525 EXPORT_SYMBOL(acpi_os_map_generic_address
);
527 void acpi_os_unmap_generic_address(struct acpi_generic_address
*gas
)
530 struct acpi_ioremap
*map
;
532 if (gas
->space_id
!= ACPI_ADR_SPACE_SYSTEM_MEMORY
)
535 /* Handle possible alignment issues */
536 memcpy(&addr
, &gas
->address
, sizeof(addr
));
537 if (!addr
|| !gas
->bit_width
)
540 mutex_lock(&acpi_ioremap_lock
);
541 map
= acpi_map_lookup(addr
, gas
->bit_width
/ 8);
543 mutex_unlock(&acpi_ioremap_lock
);
546 acpi_os_drop_map_ref(map
);
547 mutex_unlock(&acpi_ioremap_lock
);
549 acpi_os_map_cleanup(map
);
551 EXPORT_SYMBOL(acpi_os_unmap_generic_address
);
553 #ifdef ACPI_FUTURE_USAGE
555 acpi_os_get_physical_address(void *virt
, acpi_physical_address
* phys
)
558 return AE_BAD_PARAMETER
;
560 *phys
= virt_to_phys(virt
);
566 #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
567 static bool acpi_rev_override
;
569 int __init
acpi_rev_override_setup(char *str
)
571 acpi_rev_override
= true;
574 __setup("acpi_rev_override", acpi_rev_override_setup
);
576 #define acpi_rev_override false
579 #define ACPI_MAX_OVERRIDE_LEN 100
581 static char acpi_os_name
[ACPI_MAX_OVERRIDE_LEN
];
584 acpi_os_predefined_override(const struct acpi_predefined_names
*init_val
,
587 if (!init_val
|| !new_val
)
588 return AE_BAD_PARAMETER
;
591 if (!memcmp(init_val
->name
, "_OS_", 4) && strlen(acpi_os_name
)) {
592 printk(KERN_INFO PREFIX
"Overriding _OS definition to '%s'\n",
594 *new_val
= acpi_os_name
;
597 if (!memcmp(init_val
->name
, "_REV", 4) && acpi_rev_override
) {
598 printk(KERN_INFO PREFIX
"Overriding _REV return value to 5\n");
599 *new_val
= (char *)5;
605 static irqreturn_t
acpi_irq(int irq
, void *dev_id
)
609 handled
= (*acpi_irq_handler
) (acpi_irq_context
);
615 acpi_irq_not_handled
++;
621 acpi_os_install_interrupt_handler(u32 gsi
, acpi_osd_handler handler
,
626 acpi_irq_stats_init();
629 * ACPI interrupts different from the SCI in our copy of the FADT are
632 if (gsi
!= acpi_gbl_FADT
.sci_interrupt
)
633 return AE_BAD_PARAMETER
;
635 if (acpi_irq_handler
)
636 return AE_ALREADY_ACQUIRED
;
638 if (acpi_gsi_to_irq(gsi
, &irq
) < 0) {
639 printk(KERN_ERR PREFIX
"SCI (ACPI GSI %d) not registered\n",
644 acpi_irq_handler
= handler
;
645 acpi_irq_context
= context
;
646 if (request_irq(irq
, acpi_irq
, IRQF_SHARED
, "acpi", acpi_irq
)) {
647 printk(KERN_ERR PREFIX
"SCI (IRQ%d) allocation failed\n", irq
);
648 acpi_irq_handler
= NULL
;
649 return AE_NOT_ACQUIRED
;
656 acpi_status
acpi_os_remove_interrupt_handler(u32 gsi
, acpi_osd_handler handler
)
658 if (gsi
!= acpi_gbl_FADT
.sci_interrupt
|| !acpi_sci_irq_valid())
659 return AE_BAD_PARAMETER
;
661 free_irq(acpi_sci_irq
, acpi_irq
);
662 acpi_irq_handler
= NULL
;
663 acpi_sci_irq
= INVALID_ACPI_IRQ
;
669 * Running in interpreter thread context, safe to sleep
672 void acpi_os_sleep(u64 ms
)
677 void acpi_os_stall(u32 us
)
685 touch_nmi_watchdog();
691 * Support ACPI 3.0 AML Timer operand
692 * Returns 64-bit free-running, monotonically increasing timer
693 * with 100ns granularity
695 u64
acpi_os_get_timer(void)
697 u64 time_ns
= ktime_to_ns(ktime_get());
698 do_div(time_ns
, 100);
702 acpi_status
acpi_os_read_port(acpi_io_address port
, u32
* value
, u32 width
)
711 *(u8
*) value
= inb(port
);
712 } else if (width
<= 16) {
713 *(u16
*) value
= inw(port
);
714 } else if (width
<= 32) {
715 *(u32
*) value
= inl(port
);
723 EXPORT_SYMBOL(acpi_os_read_port
);
725 acpi_status
acpi_os_write_port(acpi_io_address port
, u32 value
, u32 width
)
729 } else if (width
<= 16) {
731 } else if (width
<= 32) {
740 EXPORT_SYMBOL(acpi_os_write_port
);
743 acpi_os_read_memory(acpi_physical_address phys_addr
, u64
*value
, u32 width
)
745 void __iomem
*virt_addr
;
746 unsigned int size
= width
/ 8;
751 virt_addr
= acpi_map_vaddr_lookup(phys_addr
, size
);
754 virt_addr
= acpi_os_ioremap(phys_addr
, size
);
756 return AE_BAD_ADDRESS
;
765 *(u8
*) value
= readb(virt_addr
);
768 *(u16
*) value
= readw(virt_addr
);
771 *(u32
*) value
= readl(virt_addr
);
774 *(u64
*) value
= readq(virt_addr
);
789 acpi_os_write_memory(acpi_physical_address phys_addr
, u64 value
, u32 width
)
791 void __iomem
*virt_addr
;
792 unsigned int size
= width
/ 8;
796 virt_addr
= acpi_map_vaddr_lookup(phys_addr
, size
);
799 virt_addr
= acpi_os_ioremap(phys_addr
, size
);
801 return AE_BAD_ADDRESS
;
807 writeb(value
, virt_addr
);
810 writew(value
, virt_addr
);
813 writel(value
, virt_addr
);
816 writeq(value
, virt_addr
);
831 acpi_os_read_pci_configuration(struct acpi_pci_id
* pci_id
, u32 reg
,
832 u64
*value
, u32 width
)
838 return AE_BAD_PARAMETER
;
854 result
= raw_pci_read(pci_id
->segment
, pci_id
->bus
,
855 PCI_DEVFN(pci_id
->device
, pci_id
->function
),
856 reg
, size
, &value32
);
859 return (result
? AE_ERROR
: AE_OK
);
863 acpi_os_write_pci_configuration(struct acpi_pci_id
* pci_id
, u32 reg
,
864 u64 value
, u32 width
)
882 result
= raw_pci_write(pci_id
->segment
, pci_id
->bus
,
883 PCI_DEVFN(pci_id
->device
, pci_id
->function
),
886 return (result
? AE_ERROR
: AE_OK
);
889 static void acpi_os_execute_deferred(struct work_struct
*work
)
891 struct acpi_os_dpc
*dpc
= container_of(work
, struct acpi_os_dpc
, work
);
893 dpc
->function(dpc
->context
);
897 #ifdef CONFIG_ACPI_DEBUGGER
898 static struct acpi_debugger acpi_debugger
;
899 static bool acpi_debugger_initialized
;
901 int acpi_register_debugger(struct module
*owner
,
902 const struct acpi_debugger_ops
*ops
)
906 mutex_lock(&acpi_debugger
.lock
);
907 if (acpi_debugger
.ops
) {
912 acpi_debugger
.owner
= owner
;
913 acpi_debugger
.ops
= ops
;
916 mutex_unlock(&acpi_debugger
.lock
);
919 EXPORT_SYMBOL(acpi_register_debugger
);
921 void acpi_unregister_debugger(const struct acpi_debugger_ops
*ops
)
923 mutex_lock(&acpi_debugger
.lock
);
924 if (ops
== acpi_debugger
.ops
) {
925 acpi_debugger
.ops
= NULL
;
926 acpi_debugger
.owner
= NULL
;
928 mutex_unlock(&acpi_debugger
.lock
);
930 EXPORT_SYMBOL(acpi_unregister_debugger
);
932 int acpi_debugger_create_thread(acpi_osd_exec_callback function
, void *context
)
935 int (*func
)(acpi_osd_exec_callback
, void *);
936 struct module
*owner
;
938 if (!acpi_debugger_initialized
)
940 mutex_lock(&acpi_debugger
.lock
);
941 if (!acpi_debugger
.ops
) {
945 if (!try_module_get(acpi_debugger
.owner
)) {
949 func
= acpi_debugger
.ops
->create_thread
;
950 owner
= acpi_debugger
.owner
;
951 mutex_unlock(&acpi_debugger
.lock
);
953 ret
= func(function
, context
);
955 mutex_lock(&acpi_debugger
.lock
);
958 mutex_unlock(&acpi_debugger
.lock
);
962 ssize_t
acpi_debugger_write_log(const char *msg
)
965 ssize_t (*func
)(const char *);
966 struct module
*owner
;
968 if (!acpi_debugger_initialized
)
970 mutex_lock(&acpi_debugger
.lock
);
971 if (!acpi_debugger
.ops
) {
975 if (!try_module_get(acpi_debugger
.owner
)) {
979 func
= acpi_debugger
.ops
->write_log
;
980 owner
= acpi_debugger
.owner
;
981 mutex_unlock(&acpi_debugger
.lock
);
985 mutex_lock(&acpi_debugger
.lock
);
988 mutex_unlock(&acpi_debugger
.lock
);
992 ssize_t
acpi_debugger_read_cmd(char *buffer
, size_t buffer_length
)
995 ssize_t (*func
)(char *, size_t);
996 struct module
*owner
;
998 if (!acpi_debugger_initialized
)
1000 mutex_lock(&acpi_debugger
.lock
);
1001 if (!acpi_debugger
.ops
) {
1005 if (!try_module_get(acpi_debugger
.owner
)) {
1009 func
= acpi_debugger
.ops
->read_cmd
;
1010 owner
= acpi_debugger
.owner
;
1011 mutex_unlock(&acpi_debugger
.lock
);
1013 ret
= func(buffer
, buffer_length
);
1015 mutex_lock(&acpi_debugger
.lock
);
1018 mutex_unlock(&acpi_debugger
.lock
);
1022 int acpi_debugger_wait_command_ready(void)
1025 int (*func
)(bool, char *, size_t);
1026 struct module
*owner
;
1028 if (!acpi_debugger_initialized
)
1030 mutex_lock(&acpi_debugger
.lock
);
1031 if (!acpi_debugger
.ops
) {
1035 if (!try_module_get(acpi_debugger
.owner
)) {
1039 func
= acpi_debugger
.ops
->wait_command_ready
;
1040 owner
= acpi_debugger
.owner
;
1041 mutex_unlock(&acpi_debugger
.lock
);
1043 ret
= func(acpi_gbl_method_executing
,
1044 acpi_gbl_db_line_buf
, ACPI_DB_LINE_BUFFER_SIZE
);
1046 mutex_lock(&acpi_debugger
.lock
);
1049 mutex_unlock(&acpi_debugger
.lock
);
1053 int acpi_debugger_notify_command_complete(void)
1057 struct module
*owner
;
1059 if (!acpi_debugger_initialized
)
1061 mutex_lock(&acpi_debugger
.lock
);
1062 if (!acpi_debugger
.ops
) {
1066 if (!try_module_get(acpi_debugger
.owner
)) {
1070 func
= acpi_debugger
.ops
->notify_command_complete
;
1071 owner
= acpi_debugger
.owner
;
1072 mutex_unlock(&acpi_debugger
.lock
);
1076 mutex_lock(&acpi_debugger
.lock
);
1079 mutex_unlock(&acpi_debugger
.lock
);
1083 int __init
acpi_debugger_init(void)
1085 mutex_init(&acpi_debugger
.lock
);
1086 acpi_debugger_initialized
= true;
1091 /*******************************************************************************
1093 * FUNCTION: acpi_os_execute
1095 * PARAMETERS: Type - Type of the callback
1096 * Function - Function to be executed
1097 * Context - Function parameters
1101 * DESCRIPTION: Depending on type, either queues function for deferred execution or
1102 * immediately executes function on a separate thread.
1104 ******************************************************************************/
1106 acpi_status
acpi_os_execute(acpi_execute_type type
,
1107 acpi_osd_exec_callback function
, void *context
)
1109 acpi_status status
= AE_OK
;
1110 struct acpi_os_dpc
*dpc
;
1111 struct workqueue_struct
*queue
;
1113 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
,
1114 "Scheduling function [%p(%p)] for deferred execution.\n",
1115 function
, context
));
1117 if (type
== OSL_DEBUGGER_MAIN_THREAD
) {
1118 ret
= acpi_debugger_create_thread(function
, context
);
1120 pr_err("Call to kthread_create() failed.\n");
1127 * Allocate/initialize DPC structure. Note that this memory will be
1128 * freed by the callee. The kernel handles the work_struct list in a
1129 * way that allows us to also free its memory inside the callee.
1130 * Because we may want to schedule several tasks with different
1131 * parameters we can't use the approach some kernel code uses of
1132 * having a static work_struct.
1135 dpc
= kzalloc(sizeof(struct acpi_os_dpc
), GFP_ATOMIC
);
1137 return AE_NO_MEMORY
;
1139 dpc
->function
= function
;
1140 dpc
->context
= context
;
1143 * To prevent lockdep from complaining unnecessarily, make sure that
1144 * there is a different static lockdep key for each workqueue by using
1145 * INIT_WORK() for each of them separately.
1147 if (type
== OSL_NOTIFY_HANDLER
) {
1148 queue
= kacpi_notify_wq
;
1149 INIT_WORK(&dpc
->work
, acpi_os_execute_deferred
);
1150 } else if (type
== OSL_GPE_HANDLER
) {
1152 INIT_WORK(&dpc
->work
, acpi_os_execute_deferred
);
1154 pr_err("Unsupported os_execute type %d.\n", type
);
1158 if (ACPI_FAILURE(status
))
1162 * On some machines, a software-initiated SMI causes corruption unless
1163 * the SMI runs on CPU 0. An SMI can be initiated by any AML, but
1164 * typically it's done in GPE-related methods that are run via
1165 * workqueues, so we can avoid the known corruption cases by always
1166 * queueing on CPU 0.
1168 ret
= queue_work_on(0, queue
, &dpc
->work
);
1170 printk(KERN_ERR PREFIX
1171 "Call to queue_work() failed.\n");
1175 if (ACPI_FAILURE(status
))
1180 EXPORT_SYMBOL(acpi_os_execute
);
1182 void acpi_os_wait_events_complete(void)
1185 * Make sure the GPE handler or the fixed event handler is not used
1186 * on another CPU after removal.
1188 if (acpi_sci_irq_valid())
1189 synchronize_hardirq(acpi_sci_irq
);
1190 flush_workqueue(kacpid_wq
);
1191 flush_workqueue(kacpi_notify_wq
);
1194 struct acpi_hp_work
{
1195 struct work_struct work
;
1196 struct acpi_device
*adev
;
1200 static void acpi_hotplug_work_fn(struct work_struct
*work
)
1202 struct acpi_hp_work
*hpw
= container_of(work
, struct acpi_hp_work
, work
);
1204 acpi_os_wait_events_complete();
1205 acpi_device_hotplug(hpw
->adev
, hpw
->src
);
1209 acpi_status
acpi_hotplug_schedule(struct acpi_device
*adev
, u32 src
)
1211 struct acpi_hp_work
*hpw
;
1213 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
,
1214 "Scheduling hotplug event (%p, %u) for deferred execution.\n",
1217 hpw
= kmalloc(sizeof(*hpw
), GFP_KERNEL
);
1219 return AE_NO_MEMORY
;
1221 INIT_WORK(&hpw
->work
, acpi_hotplug_work_fn
);
1225 * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because
1226 * the hotplug code may call driver .remove() functions, which may
1227 * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush
1230 if (!queue_work(kacpi_hotplug_wq
, &hpw
->work
)) {
1237 bool acpi_queue_hotplug_work(struct work_struct
*work
)
1239 return queue_work(kacpi_hotplug_wq
, work
);
1243 acpi_os_create_semaphore(u32 max_units
, u32 initial_units
, acpi_handle
* handle
)
1245 struct semaphore
*sem
= NULL
;
1247 sem
= acpi_os_allocate_zeroed(sizeof(struct semaphore
));
1249 return AE_NO_MEMORY
;
1251 sema_init(sem
, initial_units
);
1253 *handle
= (acpi_handle
*) sem
;
1255 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Creating semaphore[%p|%d].\n",
1256 *handle
, initial_units
));
1262 * TODO: A better way to delete semaphores? Linux doesn't have a
1263 * 'delete_semaphore()' function -- may result in an invalid
1264 * pointer dereference for non-synchronized consumers. Should
1265 * we at least check for blocked threads and signal/cancel them?
1268 acpi_status
acpi_os_delete_semaphore(acpi_handle handle
)
1270 struct semaphore
*sem
= (struct semaphore
*)handle
;
1273 return AE_BAD_PARAMETER
;
1275 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Deleting semaphore[%p].\n", handle
));
1277 BUG_ON(!list_empty(&sem
->wait_list
));
1285 * TODO: Support for units > 1?
1287 acpi_status
acpi_os_wait_semaphore(acpi_handle handle
, u32 units
, u16 timeout
)
1289 acpi_status status
= AE_OK
;
1290 struct semaphore
*sem
= (struct semaphore
*)handle
;
1294 if (!acpi_os_initialized
)
1297 if (!sem
|| (units
< 1))
1298 return AE_BAD_PARAMETER
;
1303 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Waiting for semaphore[%p|%d|%d]\n",
1304 handle
, units
, timeout
));
1306 if (timeout
== ACPI_WAIT_FOREVER
)
1307 jiffies
= MAX_SCHEDULE_TIMEOUT
;
1309 jiffies
= msecs_to_jiffies(timeout
);
1311 ret
= down_timeout(sem
, jiffies
);
1315 if (ACPI_FAILURE(status
)) {
1316 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
,
1317 "Failed to acquire semaphore[%p|%d|%d], %s",
1318 handle
, units
, timeout
,
1319 acpi_format_exception(status
)));
1321 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
,
1322 "Acquired semaphore[%p|%d|%d]", handle
,
1330 * TODO: Support for units > 1?
1332 acpi_status
acpi_os_signal_semaphore(acpi_handle handle
, u32 units
)
1334 struct semaphore
*sem
= (struct semaphore
*)handle
;
1336 if (!acpi_os_initialized
)
1339 if (!sem
|| (units
< 1))
1340 return AE_BAD_PARAMETER
;
1345 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Signaling semaphore[%p|%d]\n", handle
,
1353 acpi_status
acpi_os_get_line(char *buffer
, u32 buffer_length
, u32
*bytes_read
)
1355 #ifdef ENABLE_DEBUGGER
1356 if (acpi_in_debugger
) {
1359 kdb_read(buffer
, buffer_length
);
1361 /* remove the CR kdb includes */
1362 chars
= strlen(buffer
) - 1;
1363 buffer
[chars
] = '\0';
1368 ret
= acpi_debugger_read_cmd(buffer
, buffer_length
);
1377 EXPORT_SYMBOL(acpi_os_get_line
);
1379 acpi_status
acpi_os_wait_command_ready(void)
1383 ret
= acpi_debugger_wait_command_ready();
1389 acpi_status
acpi_os_notify_command_complete(void)
1393 ret
= acpi_debugger_notify_command_complete();
1399 acpi_status
acpi_os_signal(u32 function
, void *info
)
1402 case ACPI_SIGNAL_FATAL
:
1403 printk(KERN_ERR PREFIX
"Fatal opcode executed\n");
1405 case ACPI_SIGNAL_BREAKPOINT
:
1408 * ACPI spec. says to treat it as a NOP unless
1409 * you are debugging. So if/when we integrate
1410 * AML debugger into the kernel debugger its
1411 * hook will go here. But until then it is
1412 * not useful to print anything on breakpoints.
1422 static int __init
acpi_os_name_setup(char *str
)
1424 char *p
= acpi_os_name
;
1425 int count
= ACPI_MAX_OVERRIDE_LEN
- 1;
1430 for (; count
-- && *str
; str
++) {
1431 if (isalnum(*str
) || *str
== ' ' || *str
== ':')
1433 else if (*str
== '\'' || *str
== '"')
1444 __setup("acpi_os_name=", acpi_os_name_setup
);
1446 #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
1447 #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */
1449 struct osi_setup_entry
{
1450 char string
[OSI_STRING_LENGTH_MAX
];
1454 static struct osi_setup_entry
1455 osi_setup_entries
[OSI_STRING_ENTRIES_MAX
] __initdata
= {
1456 {"Module Device", true},
1457 {"Processor Device", true},
1458 {"3.0 _SCP Extensions", true},
1459 {"Processor Aggregator Device", true},
1462 void __init
acpi_osi_setup(char *str
)
1464 struct osi_setup_entry
*osi
;
1468 if (!acpi_gbl_create_osi_method
)
1471 if (str
== NULL
|| *str
== '\0') {
1472 printk(KERN_INFO PREFIX
"_OSI method disabled\n");
1473 acpi_gbl_create_osi_method
= FALSE
;
1480 osi_linux
.default_disabling
= 1;
1482 } else if (*str
== '*') {
1483 acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS
);
1484 for (i
= 0; i
< OSI_STRING_ENTRIES_MAX
; i
++) {
1485 osi
= &osi_setup_entries
[i
];
1486 osi
->enable
= false;
1493 for (i
= 0; i
< OSI_STRING_ENTRIES_MAX
; i
++) {
1494 osi
= &osi_setup_entries
[i
];
1495 if (!strcmp(osi
->string
, str
)) {
1496 osi
->enable
= enable
;
1498 } else if (osi
->string
[0] == '\0') {
1499 osi
->enable
= enable
;
1500 strncpy(osi
->string
, str
, OSI_STRING_LENGTH_MAX
);
1506 static void __init
set_osi_linux(unsigned int enable
)
1508 if (osi_linux
.enable
!= enable
)
1509 osi_linux
.enable
= enable
;
1511 if (osi_linux
.enable
)
1512 acpi_osi_setup("Linux");
1514 acpi_osi_setup("!Linux");
1519 static void __init
acpi_cmdline_osi_linux(unsigned int enable
)
1521 osi_linux
.cmdline
= 1; /* cmdline set the default and override DMI */
1523 set_osi_linux(enable
);
1528 void __init
acpi_dmi_osi_linux(int enable
, const struct dmi_system_id
*d
)
1530 printk(KERN_NOTICE PREFIX
"DMI detected: %s\n", d
->ident
);
1535 osi_linux
.dmi
= 1; /* DMI knows that this box asks OSI(Linux) */
1536 set_osi_linux(enable
);
1542 * Modify the list of "OS Interfaces" reported to BIOS via _OSI
1544 * empty string disables _OSI
1545 * string starting with '!' disables that string
1546 * otherwise string is added to list, augmenting built-in strings
1548 static void __init
acpi_osi_setup_late(void)
1550 struct osi_setup_entry
*osi
;
1555 if (osi_linux
.default_disabling
) {
1556 status
= acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS
);
1558 if (ACPI_SUCCESS(status
))
1559 printk(KERN_INFO PREFIX
"Disabled all _OSI OS vendors\n");
1562 for (i
= 0; i
< OSI_STRING_ENTRIES_MAX
; i
++) {
1563 osi
= &osi_setup_entries
[i
];
1569 status
= acpi_install_interface(str
);
1571 if (ACPI_SUCCESS(status
))
1572 printk(KERN_INFO PREFIX
"Added _OSI(%s)\n", str
);
1574 status
= acpi_remove_interface(str
);
1576 if (ACPI_SUCCESS(status
))
1577 printk(KERN_INFO PREFIX
"Deleted _OSI(%s)\n", str
);
1582 static int __init
osi_setup(char *str
)
1584 if (str
&& !strcmp("Linux", str
))
1585 acpi_cmdline_osi_linux(1);
1586 else if (str
&& !strcmp("!Linux", str
))
1587 acpi_cmdline_osi_linux(0);
1589 acpi_osi_setup(str
);
1594 __setup("acpi_osi=", osi_setup
);
1597 * Disable the auto-serialization of named objects creation methods.
1599 * This feature is enabled by default. It marks the AML control methods
1600 * that contain the opcodes to create named objects as "Serialized".
1602 static int __init
acpi_no_auto_serialize_setup(char *str
)
1604 acpi_gbl_auto_serialize_methods
= FALSE
;
1605 pr_info("ACPI: auto-serialization disabled\n");
1610 __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup
);
1612 /* Check of resource interference between native drivers and ACPI
1613 * OperationRegions (SystemIO and System Memory only).
1614 * IO ports and memory declared in ACPI might be used by the ACPI subsystem
1615 * in arbitrary AML code and can interfere with legacy drivers.
1616 * acpi_enforce_resources= can be set to:
1618 * - strict (default) (2)
1619 * -> further driver trying to access the resources will not load
1621 * -> further driver trying to access the resources will load, but you
1622 * get a system message that something might go wrong...
1625 * -> ACPI Operation Region resources will not be registered
1628 #define ENFORCE_RESOURCES_STRICT 2
1629 #define ENFORCE_RESOURCES_LAX 1
1630 #define ENFORCE_RESOURCES_NO 0
1632 static unsigned int acpi_enforce_resources
= ENFORCE_RESOURCES_STRICT
;
1634 static int __init
acpi_enforce_resources_setup(char *str
)
1636 if (str
== NULL
|| *str
== '\0')
1639 if (!strcmp("strict", str
))
1640 acpi_enforce_resources
= ENFORCE_RESOURCES_STRICT
;
1641 else if (!strcmp("lax", str
))
1642 acpi_enforce_resources
= ENFORCE_RESOURCES_LAX
;
1643 else if (!strcmp("no", str
))
1644 acpi_enforce_resources
= ENFORCE_RESOURCES_NO
;
1649 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup
);
1651 /* Check for resource conflicts between ACPI OperationRegions and native
1653 int acpi_check_resource_conflict(const struct resource
*res
)
1655 acpi_adr_space_type space_id
;
1660 if (acpi_enforce_resources
== ENFORCE_RESOURCES_NO
)
1662 if (!(res
->flags
& IORESOURCE_IO
) && !(res
->flags
& IORESOURCE_MEM
))
1665 if (res
->flags
& IORESOURCE_IO
)
1666 space_id
= ACPI_ADR_SPACE_SYSTEM_IO
;
1668 space_id
= ACPI_ADR_SPACE_SYSTEM_MEMORY
;
1670 length
= resource_size(res
);
1671 if (acpi_enforce_resources
!= ENFORCE_RESOURCES_NO
)
1673 clash
= acpi_check_address_range(space_id
, res
->start
, length
, warn
);
1676 if (acpi_enforce_resources
!= ENFORCE_RESOURCES_NO
) {
1677 if (acpi_enforce_resources
== ENFORCE_RESOURCES_LAX
)
1678 printk(KERN_NOTICE
"ACPI: This conflict may"
1679 " cause random problems and system"
1681 printk(KERN_INFO
"ACPI: If an ACPI driver is available"
1682 " for this device, you should use it instead of"
1683 " the native driver\n");
1685 if (acpi_enforce_resources
== ENFORCE_RESOURCES_STRICT
)
1690 EXPORT_SYMBOL(acpi_check_resource_conflict
);
1692 int acpi_check_region(resource_size_t start
, resource_size_t n
,
1695 struct resource res
= {
1697 .end
= start
+ n
- 1,
1699 .flags
= IORESOURCE_IO
,
1702 return acpi_check_resource_conflict(&res
);
1704 EXPORT_SYMBOL(acpi_check_region
);
1707 * Let drivers know whether the resource checks are effective
1709 int acpi_resources_are_enforced(void)
1711 return acpi_enforce_resources
== ENFORCE_RESOURCES_STRICT
;
1713 EXPORT_SYMBOL(acpi_resources_are_enforced
);
1715 bool acpi_osi_is_win8(void)
1717 return acpi_gbl_osi_data
>= ACPI_OSI_WIN_8
;
1719 EXPORT_SYMBOL(acpi_osi_is_win8
);
1722 * Deallocate the memory for a spinlock.
1724 void acpi_os_delete_lock(acpi_spinlock handle
)
1730 * Acquire a spinlock.
1732 * handle is a pointer to the spinlock_t.
1735 acpi_cpu_flags
acpi_os_acquire_lock(acpi_spinlock lockp
)
1737 acpi_cpu_flags flags
;
1738 spin_lock_irqsave(lockp
, flags
);
1743 * Release a spinlock. See above.
1746 void acpi_os_release_lock(acpi_spinlock lockp
, acpi_cpu_flags flags
)
1748 spin_unlock_irqrestore(lockp
, flags
);
1751 #ifndef ACPI_USE_LOCAL_CACHE
1753 /*******************************************************************************
1755 * FUNCTION: acpi_os_create_cache
1757 * PARAMETERS: name - Ascii name for the cache
1758 * size - Size of each cached object
1759 * depth - Maximum depth of the cache (in objects) <ignored>
1760 * cache - Where the new cache object is returned
1764 * DESCRIPTION: Create a cache object
1766 ******************************************************************************/
1769 acpi_os_create_cache(char *name
, u16 size
, u16 depth
, acpi_cache_t
** cache
)
1771 *cache
= kmem_cache_create(name
, size
, 0, 0, NULL
);
1778 /*******************************************************************************
1780 * FUNCTION: acpi_os_purge_cache
1782 * PARAMETERS: Cache - Handle to cache object
1786 * DESCRIPTION: Free all objects within the requested cache.
1788 ******************************************************************************/
1790 acpi_status
acpi_os_purge_cache(acpi_cache_t
* cache
)
1792 kmem_cache_shrink(cache
);
1796 /*******************************************************************************
1798 * FUNCTION: acpi_os_delete_cache
1800 * PARAMETERS: Cache - Handle to cache object
1804 * DESCRIPTION: Free all objects within the requested cache and delete the
1807 ******************************************************************************/
1809 acpi_status
acpi_os_delete_cache(acpi_cache_t
* cache
)
1811 kmem_cache_destroy(cache
);
1815 /*******************************************************************************
1817 * FUNCTION: acpi_os_release_object
1819 * PARAMETERS: Cache - Handle to cache object
1820 * Object - The object to be released
1824 * DESCRIPTION: Release an object to the specified cache. If cache is full,
1825 * the object is deleted.
1827 ******************************************************************************/
1829 acpi_status
acpi_os_release_object(acpi_cache_t
* cache
, void *object
)
1831 kmem_cache_free(cache
, object
);
1836 static int __init
acpi_no_static_ssdt_setup(char *s
)
1838 acpi_gbl_disable_ssdt_table_install
= TRUE
;
1839 pr_info("ACPI: static SSDT installation disabled\n");
1844 early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup
);
1846 static int __init
acpi_disable_return_repair(char *s
)
1848 printk(KERN_NOTICE PREFIX
1849 "ACPI: Predefined validation mechanism disabled\n");
1850 acpi_gbl_disable_auto_repair
= TRUE
;
1855 __setup("acpica_no_return_repair", acpi_disable_return_repair
);
1857 acpi_status __init
acpi_os_initialize(void)
1859 acpi_os_map_generic_address(&acpi_gbl_FADT
.xpm1a_event_block
);
1860 acpi_os_map_generic_address(&acpi_gbl_FADT
.xpm1b_event_block
);
1861 acpi_os_map_generic_address(&acpi_gbl_FADT
.xgpe0_block
);
1862 acpi_os_map_generic_address(&acpi_gbl_FADT
.xgpe1_block
);
1863 if (acpi_gbl_FADT
.flags
& ACPI_FADT_RESET_REGISTER
) {
1865 * Use acpi_os_map_generic_address to pre-map the reset
1866 * register if it's in system memory.
1870 rv
= acpi_os_map_generic_address(&acpi_gbl_FADT
.reset_register
);
1871 pr_debug(PREFIX
"%s: map reset_reg status %d\n", __func__
, rv
);
1873 acpi_os_initialized
= true;
1878 acpi_status __init
acpi_os_initialize1(void)
1880 kacpid_wq
= alloc_workqueue("kacpid", 0, 1);
1881 kacpi_notify_wq
= alloc_workqueue("kacpi_notify", 0, 1);
1882 kacpi_hotplug_wq
= alloc_ordered_workqueue("kacpi_hotplug", 0);
1884 BUG_ON(!kacpi_notify_wq
);
1885 BUG_ON(!kacpi_hotplug_wq
);
1886 acpi_install_interface_handler(acpi_osi_handler
);
1887 acpi_osi_setup_late();
1891 acpi_status
acpi_os_terminate(void)
1893 if (acpi_irq_handler
) {
1894 acpi_os_remove_interrupt_handler(acpi_gbl_FADT
.sci_interrupt
,
1898 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.xgpe1_block
);
1899 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.xgpe0_block
);
1900 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.xpm1b_event_block
);
1901 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.xpm1a_event_block
);
1902 if (acpi_gbl_FADT
.flags
& ACPI_FADT_RESET_REGISTER
)
1903 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.reset_register
);
1905 destroy_workqueue(kacpid_wq
);
1906 destroy_workqueue(kacpi_notify_wq
);
1907 destroy_workqueue(kacpi_hotplug_wq
);
1912 acpi_status
acpi_os_prepare_sleep(u8 sleep_state
, u32 pm1a_control
,
1916 if (__acpi_os_prepare_sleep
)
1917 rc
= __acpi_os_prepare_sleep(sleep_state
,
1918 pm1a_control
, pm1b_control
);
1922 return AE_CTRL_SKIP
;
1927 void acpi_os_set_prepare_sleep(int (*func
)(u8 sleep_state
,
1928 u32 pm1a_ctrl
, u32 pm1b_ctrl
))
1930 __acpi_os_prepare_sleep
= func
;
1933 acpi_status
acpi_os_prepare_extended_sleep(u8 sleep_state
, u32 val_a
,
1937 if (__acpi_os_prepare_extended_sleep
)
1938 rc
= __acpi_os_prepare_extended_sleep(sleep_state
,
1943 return AE_CTRL_SKIP
;
1948 void acpi_os_set_prepare_extended_sleep(int (*func
)(u8 sleep_state
,
1949 u32 val_a
, u32 val_b
))
1951 __acpi_os_prepare_extended_sleep
= func
;