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 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
30 #include <linux/module.h>
31 #include <linux/kernel.h>
32 #include <linux/slab.h>
34 #include <linux/highmem.h>
35 #include <linux/pci.h>
36 #include <linux/interrupt.h>
37 #include <linux/kmod.h>
38 #include <linux/delay.h>
39 #include <linux/workqueue.h>
40 #include <linux/nmi.h>
41 #include <linux/acpi.h>
42 #include <linux/efi.h>
43 #include <linux/ioport.h>
44 #include <linux/list.h>
45 #include <linux/jiffies.h>
46 #include <linux/semaphore.h>
49 #include <asm/uaccess.h>
53 #define _COMPONENT ACPI_OS_SERVICES
54 ACPI_MODULE_NAME("osl");
57 acpi_osd_exec_callback function
;
59 struct work_struct work
;
62 #ifdef CONFIG_ACPI_CUSTOM_DSDT
63 #include CONFIG_ACPI_CUSTOM_DSDT_FILE
66 #ifdef ENABLE_DEBUGGER
67 #include <linux/kdb.h>
69 /* stuff for debugger support */
71 EXPORT_SYMBOL(acpi_in_debugger
);
73 extern char line_buf
[80];
74 #endif /*ENABLE_DEBUGGER */
76 static int (*__acpi_os_prepare_sleep
)(u8 sleep_state
, u32 pm1a_ctrl
,
78 static int (*__acpi_os_prepare_extended_sleep
)(u8 sleep_state
, u32 val_a
,
81 static acpi_osd_handler acpi_irq_handler
;
82 static void *acpi_irq_context
;
83 static struct workqueue_struct
*kacpid_wq
;
84 static struct workqueue_struct
*kacpi_notify_wq
;
85 static struct workqueue_struct
*kacpi_hotplug_wq
;
88 * This list of permanent mappings is for memory that may be accessed from
89 * interrupt context, where we can't do the ioremap().
92 struct list_head list
;
94 acpi_physical_address phys
;
96 unsigned long refcount
;
99 static LIST_HEAD(acpi_ioremaps
);
100 static DEFINE_MUTEX(acpi_ioremap_lock
);
102 static void __init
acpi_osi_setup_late(void);
105 * The story of _OSI(Linux)
107 * From pre-history through Linux-2.6.22,
108 * Linux responded TRUE upon a BIOS OSI(Linux) query.
110 * Unfortunately, reference BIOS writers got wind of this
111 * and put OSI(Linux) in their example code, quickly exposing
112 * this string as ill-conceived and opening the door to
113 * an un-bounded number of BIOS incompatibilities.
115 * For example, OSI(Linux) was used on resume to re-POST a
116 * video card on one system, because Linux at that time
117 * could not do a speedy restore in its native driver.
118 * But then upon gaining quick native restore capability,
119 * Linux has no way to tell the BIOS to skip the time-consuming
120 * POST -- putting Linux at a permanent performance disadvantage.
121 * On another system, the BIOS writer used OSI(Linux)
122 * to infer native OS support for IPMI! On other systems,
123 * OSI(Linux) simply got in the way of Linux claiming to
124 * be compatible with other operating systems, exposing
125 * BIOS issues such as skipped device initialization.
127 * So "Linux" turned out to be a really poor chose of
128 * OSI string, and from Linux-2.6.23 onward we respond FALSE.
130 * BIOS writers should NOT query _OSI(Linux) on future systems.
131 * Linux will complain on the console when it sees it, and return FALSE.
132 * To get Linux to return TRUE for your system will require
133 * a kernel source update to add a DMI entry,
134 * or boot with "acpi_osi=Linux"
137 static struct osi_linux
{
138 unsigned int enable
:1;
140 unsigned int cmdline
:1;
141 unsigned int default_disabling
:1;
142 } osi_linux
= {0, 0, 0, 0};
144 static u32
acpi_osi_handler(acpi_string interface
, u32 supported
)
146 if (!strcmp("Linux", interface
)) {
148 printk_once(KERN_NOTICE FW_BUG PREFIX
149 "BIOS _OSI(Linux) query %s%s\n",
150 osi_linux
.enable
? "honored" : "ignored",
151 osi_linux
.cmdline
? " via cmdline" :
152 osi_linux
.dmi
? " via DMI" : "");
155 if (!strcmp("Darwin", interface
)) {
157 * Apple firmware will behave poorly if it receives positive
158 * answers to "Darwin" and any other OS. Respond positively
159 * to Darwin and then disable all other vendor strings.
161 acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS
);
162 supported
= ACPI_UINT32_MAX
;
168 static void __init
acpi_request_region (struct acpi_generic_address
*gas
,
169 unsigned int length
, char *desc
)
173 /* Handle possible alignment issues */
174 memcpy(&addr
, &gas
->address
, sizeof(addr
));
175 if (!addr
|| !length
)
178 acpi_reserve_region(addr
, length
, gas
->space_id
, 0, desc
);
181 static void __init
acpi_reserve_resources(void)
183 acpi_request_region(&acpi_gbl_FADT
.xpm1a_event_block
, acpi_gbl_FADT
.pm1_event_length
,
184 "ACPI PM1a_EVT_BLK");
186 acpi_request_region(&acpi_gbl_FADT
.xpm1b_event_block
, acpi_gbl_FADT
.pm1_event_length
,
187 "ACPI PM1b_EVT_BLK");
189 acpi_request_region(&acpi_gbl_FADT
.xpm1a_control_block
, acpi_gbl_FADT
.pm1_control_length
,
190 "ACPI PM1a_CNT_BLK");
192 acpi_request_region(&acpi_gbl_FADT
.xpm1b_control_block
, acpi_gbl_FADT
.pm1_control_length
,
193 "ACPI PM1b_CNT_BLK");
195 if (acpi_gbl_FADT
.pm_timer_length
== 4)
196 acpi_request_region(&acpi_gbl_FADT
.xpm_timer_block
, 4, "ACPI PM_TMR");
198 acpi_request_region(&acpi_gbl_FADT
.xpm2_control_block
, acpi_gbl_FADT
.pm2_control_length
,
201 /* Length of GPE blocks must be a non-negative multiple of 2 */
203 if (!(acpi_gbl_FADT
.gpe0_block_length
& 0x1))
204 acpi_request_region(&acpi_gbl_FADT
.xgpe0_block
,
205 acpi_gbl_FADT
.gpe0_block_length
, "ACPI GPE0_BLK");
207 if (!(acpi_gbl_FADT
.gpe1_block_length
& 0x1))
208 acpi_request_region(&acpi_gbl_FADT
.xgpe1_block
,
209 acpi_gbl_FADT
.gpe1_block_length
, "ACPI GPE1_BLK");
212 void acpi_os_printf(const char *fmt
, ...)
216 acpi_os_vprintf(fmt
, args
);
220 void acpi_os_vprintf(const char *fmt
, va_list args
)
222 static char buffer
[512];
224 vsprintf(buffer
, fmt
, args
);
226 #ifdef ENABLE_DEBUGGER
227 if (acpi_in_debugger
) {
228 kdb_printf("%s", buffer
);
230 printk(KERN_CONT
"%s", buffer
);
233 printk(KERN_CONT
"%s", buffer
);
238 static unsigned long acpi_rsdp
;
239 static int __init
setup_acpi_rsdp(char *arg
)
241 if (kstrtoul(arg
, 16, &acpi_rsdp
))
245 early_param("acpi_rsdp", setup_acpi_rsdp
);
248 acpi_physical_address __init
acpi_os_get_root_pointer(void)
255 if (efi_enabled(EFI_CONFIG_TABLES
)) {
256 if (efi
.acpi20
!= EFI_INVALID_TABLE_ADDR
)
258 else if (efi
.acpi
!= EFI_INVALID_TABLE_ADDR
)
261 printk(KERN_ERR PREFIX
262 "System description tables not found\n");
265 } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP
)) {
266 acpi_physical_address pa
= 0;
268 acpi_find_root_pointer(&pa
);
275 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
276 static struct acpi_ioremap
*
277 acpi_map_lookup(acpi_physical_address phys
, acpi_size size
)
279 struct acpi_ioremap
*map
;
281 list_for_each_entry_rcu(map
, &acpi_ioremaps
, list
)
282 if (map
->phys
<= phys
&&
283 phys
+ size
<= map
->phys
+ map
->size
)
289 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
290 static void __iomem
*
291 acpi_map_vaddr_lookup(acpi_physical_address phys
, unsigned int size
)
293 struct acpi_ioremap
*map
;
295 map
= acpi_map_lookup(phys
, size
);
297 return map
->virt
+ (phys
- map
->phys
);
302 void __iomem
*acpi_os_get_iomem(acpi_physical_address phys
, unsigned int size
)
304 struct acpi_ioremap
*map
;
305 void __iomem
*virt
= NULL
;
307 mutex_lock(&acpi_ioremap_lock
);
308 map
= acpi_map_lookup(phys
, size
);
310 virt
= map
->virt
+ (phys
- map
->phys
);
313 mutex_unlock(&acpi_ioremap_lock
);
316 EXPORT_SYMBOL_GPL(acpi_os_get_iomem
);
318 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
319 static struct acpi_ioremap
*
320 acpi_map_lookup_virt(void __iomem
*virt
, acpi_size size
)
322 struct acpi_ioremap
*map
;
324 list_for_each_entry_rcu(map
, &acpi_ioremaps
, list
)
325 if (map
->virt
<= virt
&&
326 virt
+ size
<= map
->virt
+ map
->size
)
332 #if defined(CONFIG_IA64) || defined(CONFIG_ARM64)
333 /* ioremap will take care of cache attributes */
334 #define should_use_kmap(pfn) 0
336 #define should_use_kmap(pfn) page_is_ram(pfn)
339 static void __iomem
*acpi_map(acpi_physical_address pg_off
, unsigned long pg_sz
)
343 pfn
= pg_off
>> PAGE_SHIFT
;
344 if (should_use_kmap(pfn
)) {
345 if (pg_sz
> PAGE_SIZE
)
347 return (void __iomem __force
*)kmap(pfn_to_page(pfn
));
349 return acpi_os_ioremap(pg_off
, pg_sz
);
352 static void acpi_unmap(acpi_physical_address pg_off
, void __iomem
*vaddr
)
356 pfn
= pg_off
>> PAGE_SHIFT
;
357 if (should_use_kmap(pfn
))
358 kunmap(pfn_to_page(pfn
));
363 void __iomem
*__init_refok
364 acpi_os_map_iomem(acpi_physical_address phys
, acpi_size size
)
366 struct acpi_ioremap
*map
;
368 acpi_physical_address pg_off
;
371 if (phys
> ULONG_MAX
) {
372 printk(KERN_ERR PREFIX
"Cannot map memory that high\n");
376 if (!acpi_gbl_permanent_mmap
)
377 return __acpi_map_table((unsigned long)phys
, size
);
379 mutex_lock(&acpi_ioremap_lock
);
380 /* Check if there's a suitable mapping already. */
381 map
= acpi_map_lookup(phys
, size
);
387 map
= kzalloc(sizeof(*map
), GFP_KERNEL
);
389 mutex_unlock(&acpi_ioremap_lock
);
393 pg_off
= round_down(phys
, PAGE_SIZE
);
394 pg_sz
= round_up(phys
+ size
, PAGE_SIZE
) - pg_off
;
395 virt
= acpi_map(pg_off
, pg_sz
);
397 mutex_unlock(&acpi_ioremap_lock
);
402 INIT_LIST_HEAD(&map
->list
);
408 list_add_tail_rcu(&map
->list
, &acpi_ioremaps
);
411 mutex_unlock(&acpi_ioremap_lock
);
412 return map
->virt
+ (phys
- map
->phys
);
414 EXPORT_SYMBOL_GPL(acpi_os_map_iomem
);
417 acpi_os_map_memory(acpi_physical_address phys
, acpi_size size
)
419 return (void *)acpi_os_map_iomem(phys
, size
);
421 EXPORT_SYMBOL_GPL(acpi_os_map_memory
);
423 static void acpi_os_drop_map_ref(struct acpi_ioremap
*map
)
425 if (!--map
->refcount
)
426 list_del_rcu(&map
->list
);
429 static void acpi_os_map_cleanup(struct acpi_ioremap
*map
)
431 if (!map
->refcount
) {
432 synchronize_rcu_expedited();
433 acpi_unmap(map
->phys
, map
->virt
);
438 void __ref
acpi_os_unmap_iomem(void __iomem
*virt
, acpi_size size
)
440 struct acpi_ioremap
*map
;
442 if (!acpi_gbl_permanent_mmap
) {
443 __acpi_unmap_table(virt
, size
);
447 mutex_lock(&acpi_ioremap_lock
);
448 map
= acpi_map_lookup_virt(virt
, size
);
450 mutex_unlock(&acpi_ioremap_lock
);
451 WARN(true, PREFIX
"%s: bad address %p\n", __func__
, virt
);
454 acpi_os_drop_map_ref(map
);
455 mutex_unlock(&acpi_ioremap_lock
);
457 acpi_os_map_cleanup(map
);
459 EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem
);
461 void __ref
acpi_os_unmap_memory(void *virt
, acpi_size size
)
463 return acpi_os_unmap_iomem((void __iomem
*)virt
, size
);
465 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory
);
467 void __init
early_acpi_os_unmap_memory(void __iomem
*virt
, acpi_size size
)
469 if (!acpi_gbl_permanent_mmap
)
470 __acpi_unmap_table(virt
, size
);
473 int acpi_os_map_generic_address(struct acpi_generic_address
*gas
)
478 if (gas
->space_id
!= ACPI_ADR_SPACE_SYSTEM_MEMORY
)
481 /* Handle possible alignment issues */
482 memcpy(&addr
, &gas
->address
, sizeof(addr
));
483 if (!addr
|| !gas
->bit_width
)
486 virt
= acpi_os_map_iomem(addr
, gas
->bit_width
/ 8);
492 EXPORT_SYMBOL(acpi_os_map_generic_address
);
494 void acpi_os_unmap_generic_address(struct acpi_generic_address
*gas
)
497 struct acpi_ioremap
*map
;
499 if (gas
->space_id
!= ACPI_ADR_SPACE_SYSTEM_MEMORY
)
502 /* Handle possible alignment issues */
503 memcpy(&addr
, &gas
->address
, sizeof(addr
));
504 if (!addr
|| !gas
->bit_width
)
507 mutex_lock(&acpi_ioremap_lock
);
508 map
= acpi_map_lookup(addr
, gas
->bit_width
/ 8);
510 mutex_unlock(&acpi_ioremap_lock
);
513 acpi_os_drop_map_ref(map
);
514 mutex_unlock(&acpi_ioremap_lock
);
516 acpi_os_map_cleanup(map
);
518 EXPORT_SYMBOL(acpi_os_unmap_generic_address
);
520 #ifdef ACPI_FUTURE_USAGE
522 acpi_os_get_physical_address(void *virt
, acpi_physical_address
* phys
)
525 return AE_BAD_PARAMETER
;
527 *phys
= virt_to_phys(virt
);
533 #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
534 static bool acpi_rev_override
;
536 int __init
acpi_rev_override_setup(char *str
)
538 acpi_rev_override
= true;
541 __setup("acpi_rev_override", acpi_rev_override_setup
);
543 #define acpi_rev_override false
546 #define ACPI_MAX_OVERRIDE_LEN 100
548 static char acpi_os_name
[ACPI_MAX_OVERRIDE_LEN
];
551 acpi_os_predefined_override(const struct acpi_predefined_names
*init_val
,
554 if (!init_val
|| !new_val
)
555 return AE_BAD_PARAMETER
;
558 if (!memcmp(init_val
->name
, "_OS_", 4) && strlen(acpi_os_name
)) {
559 printk(KERN_INFO PREFIX
"Overriding _OS definition to '%s'\n",
561 *new_val
= acpi_os_name
;
564 if (!memcmp(init_val
->name
, "_REV", 4) && acpi_rev_override
) {
565 printk(KERN_INFO PREFIX
"Overriding _REV return value to 5\n");
566 *new_val
= (char *)5;
572 #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
573 #include <linux/earlycpio.h>
574 #include <linux/memblock.h>
576 static u64 acpi_tables_addr
;
577 static int all_tables_size
;
579 /* Copied from acpica/tbutils.c:acpi_tb_checksum() */
580 static u8 __init
acpi_table_checksum(u8
*buffer
, u32 length
)
583 u8
*end
= buffer
+ length
;
586 sum
= (u8
) (sum
+ *(buffer
++));
590 /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */
591 static const char * const table_sigs
[] = {
592 ACPI_SIG_BERT
, ACPI_SIG_CPEP
, ACPI_SIG_ECDT
, ACPI_SIG_EINJ
,
593 ACPI_SIG_ERST
, ACPI_SIG_HEST
, ACPI_SIG_MADT
, ACPI_SIG_MSCT
,
594 ACPI_SIG_SBST
, ACPI_SIG_SLIT
, ACPI_SIG_SRAT
, ACPI_SIG_ASF
,
595 ACPI_SIG_BOOT
, ACPI_SIG_DBGP
, ACPI_SIG_DMAR
, ACPI_SIG_HPET
,
596 ACPI_SIG_IBFT
, ACPI_SIG_IVRS
, ACPI_SIG_MCFG
, ACPI_SIG_MCHI
,
597 ACPI_SIG_SLIC
, ACPI_SIG_SPCR
, ACPI_SIG_SPMI
, ACPI_SIG_TCPA
,
598 ACPI_SIG_UEFI
, ACPI_SIG_WAET
, ACPI_SIG_WDAT
, ACPI_SIG_WDDT
,
599 ACPI_SIG_WDRT
, ACPI_SIG_DSDT
, ACPI_SIG_FADT
, ACPI_SIG_PSDT
,
600 ACPI_SIG_RSDT
, ACPI_SIG_XSDT
, ACPI_SIG_SSDT
, NULL
};
602 #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
604 #define ACPI_OVERRIDE_TABLES 64
605 static struct cpio_data __initdata acpi_initrd_files
[ACPI_OVERRIDE_TABLES
];
607 #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT)
609 void __init
acpi_initrd_override(void *data
, size_t size
)
611 int sig
, no
, table_nr
= 0, total_offset
= 0;
613 struct acpi_table_header
*table
;
614 char cpio_path
[32] = "kernel/firmware/acpi/";
615 struct cpio_data file
;
617 if (data
== NULL
|| size
== 0)
620 for (no
= 0; no
< ACPI_OVERRIDE_TABLES
; no
++) {
621 file
= find_cpio_data(cpio_path
, data
, size
, &offset
);
628 if (file
.size
< sizeof(struct acpi_table_header
)) {
629 pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n",
630 cpio_path
, file
.name
);
636 for (sig
= 0; table_sigs
[sig
]; sig
++)
637 if (!memcmp(table
->signature
, table_sigs
[sig
], 4))
640 if (!table_sigs
[sig
]) {
641 pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n",
642 cpio_path
, file
.name
);
645 if (file
.size
!= table
->length
) {
646 pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n",
647 cpio_path
, file
.name
);
650 if (acpi_table_checksum(file
.data
, table
->length
)) {
651 pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n",
652 cpio_path
, file
.name
);
656 pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n",
657 table
->signature
, cpio_path
, file
.name
, table
->length
);
659 all_tables_size
+= table
->length
;
660 acpi_initrd_files
[table_nr
].data
= file
.data
;
661 acpi_initrd_files
[table_nr
].size
= file
.size
;
668 memblock_find_in_range(0, max_low_pfn_mapped
<< PAGE_SHIFT
,
669 all_tables_size
, PAGE_SIZE
);
670 if (!acpi_tables_addr
) {
675 * Only calling e820_add_reserve does not work and the
676 * tables are invalid (memory got used) later.
677 * memblock_reserve works as expected and the tables won't get modified.
678 * But it's not enough on X86 because ioremap will
679 * complain later (used by acpi_os_map_memory) that the pages
680 * that should get mapped are not marked "reserved".
681 * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area)
684 memblock_reserve(acpi_tables_addr
, all_tables_size
);
685 arch_reserve_mem_area(acpi_tables_addr
, all_tables_size
);
688 * early_ioremap only can remap 256k one time. If we map all
689 * tables one time, we will hit the limit. Need to map chunks
690 * one by one during copying the same as that in relocate_initrd().
692 for (no
= 0; no
< table_nr
; no
++) {
693 unsigned char *src_p
= acpi_initrd_files
[no
].data
;
694 phys_addr_t size
= acpi_initrd_files
[no
].size
;
695 phys_addr_t dest_addr
= acpi_tables_addr
+ total_offset
;
696 phys_addr_t slop
, clen
;
699 total_offset
+= size
;
702 slop
= dest_addr
& ~PAGE_MASK
;
704 if (clen
> MAP_CHUNK_SIZE
- slop
)
705 clen
= MAP_CHUNK_SIZE
- slop
;
706 dest_p
= early_ioremap(dest_addr
& PAGE_MASK
,
708 memcpy(dest_p
+ slop
, src_p
, clen
);
709 early_iounmap(dest_p
, clen
+ slop
);
716 #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */
718 static void acpi_table_taint(struct acpi_table_header
*table
)
721 "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n",
722 table
->signature
, table
->oem_table_id
);
723 add_taint(TAINT_OVERRIDDEN_ACPI_TABLE
, LOCKDEP_NOW_UNRELIABLE
);
728 acpi_os_table_override(struct acpi_table_header
* existing_table
,
729 struct acpi_table_header
** new_table
)
731 if (!existing_table
|| !new_table
)
732 return AE_BAD_PARAMETER
;
736 #ifdef CONFIG_ACPI_CUSTOM_DSDT
737 if (strncmp(existing_table
->signature
, "DSDT", 4) == 0)
738 *new_table
= (struct acpi_table_header
*)AmlCode
;
740 if (*new_table
!= NULL
)
741 acpi_table_taint(existing_table
);
746 acpi_os_physical_table_override(struct acpi_table_header
*existing_table
,
747 acpi_physical_address
*address
,
750 #ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
755 int table_offset
= 0;
756 struct acpi_table_header
*table
;
761 if (!acpi_tables_addr
)
765 if (table_offset
+ ACPI_HEADER_SIZE
> all_tables_size
) {
770 table
= acpi_os_map_memory(acpi_tables_addr
+ table_offset
,
773 if (table_offset
+ table
->length
> all_tables_size
) {
774 acpi_os_unmap_memory(table
, ACPI_HEADER_SIZE
);
779 table_offset
+= table
->length
;
781 if (memcmp(existing_table
->signature
, table
->signature
, 4)) {
782 acpi_os_unmap_memory(table
,
787 /* Only override tables with matching oem id */
788 if (memcmp(table
->oem_table_id
, existing_table
->oem_table_id
,
789 ACPI_OEM_TABLE_ID_SIZE
)) {
790 acpi_os_unmap_memory(table
,
795 table_offset
-= table
->length
;
796 *table_length
= table
->length
;
797 acpi_os_unmap_memory(table
, ACPI_HEADER_SIZE
);
798 *address
= acpi_tables_addr
+ table_offset
;
800 } while (table_offset
+ ACPI_HEADER_SIZE
< all_tables_size
);
803 acpi_table_taint(existing_table
);
808 static irqreturn_t
acpi_irq(int irq
, void *dev_id
)
812 handled
= (*acpi_irq_handler
) (acpi_irq_context
);
818 acpi_irq_not_handled
++;
824 acpi_os_install_interrupt_handler(u32 gsi
, acpi_osd_handler handler
,
829 acpi_irq_stats_init();
832 * ACPI interrupts different from the SCI in our copy of the FADT are
835 if (gsi
!= acpi_gbl_FADT
.sci_interrupt
)
836 return AE_BAD_PARAMETER
;
838 if (acpi_irq_handler
)
839 return AE_ALREADY_ACQUIRED
;
841 if (acpi_gsi_to_irq(gsi
, &irq
) < 0) {
842 printk(KERN_ERR PREFIX
"SCI (ACPI GSI %d) not registered\n",
847 acpi_irq_handler
= handler
;
848 acpi_irq_context
= context
;
849 if (request_irq(irq
, acpi_irq
, IRQF_SHARED
, "acpi", acpi_irq
)) {
850 printk(KERN_ERR PREFIX
"SCI (IRQ%d) allocation failed\n", irq
);
851 acpi_irq_handler
= NULL
;
852 return AE_NOT_ACQUIRED
;
858 acpi_status
acpi_os_remove_interrupt_handler(u32 irq
, acpi_osd_handler handler
)
860 if (irq
!= acpi_gbl_FADT
.sci_interrupt
)
861 return AE_BAD_PARAMETER
;
863 free_irq(irq
, acpi_irq
);
864 acpi_irq_handler
= NULL
;
870 * Running in interpreter thread context, safe to sleep
873 void acpi_os_sleep(u64 ms
)
878 void acpi_os_stall(u32 us
)
886 touch_nmi_watchdog();
892 * Support ACPI 3.0 AML Timer operand
893 * Returns 64-bit free-running, monotonically increasing timer
894 * with 100ns granularity
896 u64
acpi_os_get_timer(void)
898 u64 time_ns
= ktime_to_ns(ktime_get());
899 do_div(time_ns
, 100);
903 acpi_status
acpi_os_read_port(acpi_io_address port
, u32
* value
, u32 width
)
912 *(u8
*) value
= inb(port
);
913 } else if (width
<= 16) {
914 *(u16
*) value
= inw(port
);
915 } else if (width
<= 32) {
916 *(u32
*) value
= inl(port
);
924 EXPORT_SYMBOL(acpi_os_read_port
);
926 acpi_status
acpi_os_write_port(acpi_io_address port
, u32 value
, u32 width
)
930 } else if (width
<= 16) {
932 } else if (width
<= 32) {
941 EXPORT_SYMBOL(acpi_os_write_port
);
944 static inline u64
read64(const volatile void __iomem
*addr
)
949 static inline u64
read64(const volatile void __iomem
*addr
)
954 return l
| (h
<< 32);
959 acpi_os_read_memory(acpi_physical_address phys_addr
, u64
*value
, u32 width
)
961 void __iomem
*virt_addr
;
962 unsigned int size
= width
/ 8;
967 virt_addr
= acpi_map_vaddr_lookup(phys_addr
, size
);
970 virt_addr
= acpi_os_ioremap(phys_addr
, size
);
972 return AE_BAD_ADDRESS
;
981 *(u8
*) value
= readb(virt_addr
);
984 *(u16
*) value
= readw(virt_addr
);
987 *(u32
*) value
= readl(virt_addr
);
990 *(u64
*) value
= read64(virt_addr
);
1005 static inline void write64(u64 val
, volatile void __iomem
*addr
)
1010 static inline void write64(u64 val
, volatile void __iomem
*addr
)
1013 writel(val
>>32, addr
+4);
1018 acpi_os_write_memory(acpi_physical_address phys_addr
, u64 value
, u32 width
)
1020 void __iomem
*virt_addr
;
1021 unsigned int size
= width
/ 8;
1025 virt_addr
= acpi_map_vaddr_lookup(phys_addr
, size
);
1028 virt_addr
= acpi_os_ioremap(phys_addr
, size
);
1030 return AE_BAD_ADDRESS
;
1036 writeb(value
, virt_addr
);
1039 writew(value
, virt_addr
);
1042 writel(value
, virt_addr
);
1045 write64(value
, virt_addr
);
1060 acpi_os_read_pci_configuration(struct acpi_pci_id
* pci_id
, u32 reg
,
1061 u64
*value
, u32 width
)
1067 return AE_BAD_PARAMETER
;
1083 result
= raw_pci_read(pci_id
->segment
, pci_id
->bus
,
1084 PCI_DEVFN(pci_id
->device
, pci_id
->function
),
1085 reg
, size
, &value32
);
1088 return (result
? AE_ERROR
: AE_OK
);
1092 acpi_os_write_pci_configuration(struct acpi_pci_id
* pci_id
, u32 reg
,
1093 u64 value
, u32 width
)
1111 result
= raw_pci_write(pci_id
->segment
, pci_id
->bus
,
1112 PCI_DEVFN(pci_id
->device
, pci_id
->function
),
1115 return (result
? AE_ERROR
: AE_OK
);
1118 static void acpi_os_execute_deferred(struct work_struct
*work
)
1120 struct acpi_os_dpc
*dpc
= container_of(work
, struct acpi_os_dpc
, work
);
1122 dpc
->function(dpc
->context
);
1126 /*******************************************************************************
1128 * FUNCTION: acpi_os_execute
1130 * PARAMETERS: Type - Type of the callback
1131 * Function - Function to be executed
1132 * Context - Function parameters
1136 * DESCRIPTION: Depending on type, either queues function for deferred execution or
1137 * immediately executes function on a separate thread.
1139 ******************************************************************************/
1141 acpi_status
acpi_os_execute(acpi_execute_type type
,
1142 acpi_osd_exec_callback function
, void *context
)
1144 acpi_status status
= AE_OK
;
1145 struct acpi_os_dpc
*dpc
;
1146 struct workqueue_struct
*queue
;
1148 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
,
1149 "Scheduling function [%p(%p)] for deferred execution.\n",
1150 function
, context
));
1153 * Allocate/initialize DPC structure. Note that this memory will be
1154 * freed by the callee. The kernel handles the work_struct list in a
1155 * way that allows us to also free its memory inside the callee.
1156 * Because we may want to schedule several tasks with different
1157 * parameters we can't use the approach some kernel code uses of
1158 * having a static work_struct.
1161 dpc
= kzalloc(sizeof(struct acpi_os_dpc
), GFP_ATOMIC
);
1163 return AE_NO_MEMORY
;
1165 dpc
->function
= function
;
1166 dpc
->context
= context
;
1169 * To prevent lockdep from complaining unnecessarily, make sure that
1170 * there is a different static lockdep key for each workqueue by using
1171 * INIT_WORK() for each of them separately.
1173 if (type
== OSL_NOTIFY_HANDLER
) {
1174 queue
= kacpi_notify_wq
;
1175 INIT_WORK(&dpc
->work
, acpi_os_execute_deferred
);
1178 INIT_WORK(&dpc
->work
, acpi_os_execute_deferred
);
1182 * On some machines, a software-initiated SMI causes corruption unless
1183 * the SMI runs on CPU 0. An SMI can be initiated by any AML, but
1184 * typically it's done in GPE-related methods that are run via
1185 * workqueues, so we can avoid the known corruption cases by always
1186 * queueing on CPU 0.
1188 ret
= queue_work_on(0, queue
, &dpc
->work
);
1191 printk(KERN_ERR PREFIX
1192 "Call to queue_work() failed.\n");
1198 EXPORT_SYMBOL(acpi_os_execute
);
1200 void acpi_os_wait_events_complete(void)
1203 * Make sure the GPE handler or the fixed event handler is not used
1204 * on another CPU after removal.
1206 if (acpi_irq_handler
)
1207 synchronize_hardirq(acpi_gbl_FADT
.sci_interrupt
);
1208 flush_workqueue(kacpid_wq
);
1209 flush_workqueue(kacpi_notify_wq
);
1212 struct acpi_hp_work
{
1213 struct work_struct work
;
1214 struct acpi_device
*adev
;
1218 static void acpi_hotplug_work_fn(struct work_struct
*work
)
1220 struct acpi_hp_work
*hpw
= container_of(work
, struct acpi_hp_work
, work
);
1222 acpi_os_wait_events_complete();
1223 acpi_device_hotplug(hpw
->adev
, hpw
->src
);
1227 acpi_status
acpi_hotplug_schedule(struct acpi_device
*adev
, u32 src
)
1229 struct acpi_hp_work
*hpw
;
1231 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
,
1232 "Scheduling hotplug event (%p, %u) for deferred execution.\n",
1235 hpw
= kmalloc(sizeof(*hpw
), GFP_KERNEL
);
1237 return AE_NO_MEMORY
;
1239 INIT_WORK(&hpw
->work
, acpi_hotplug_work_fn
);
1243 * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because
1244 * the hotplug code may call driver .remove() functions, which may
1245 * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush
1248 if (!queue_work(kacpi_hotplug_wq
, &hpw
->work
)) {
1255 bool acpi_queue_hotplug_work(struct work_struct
*work
)
1257 return queue_work(kacpi_hotplug_wq
, work
);
1261 acpi_os_create_semaphore(u32 max_units
, u32 initial_units
, acpi_handle
* handle
)
1263 struct semaphore
*sem
= NULL
;
1265 sem
= acpi_os_allocate_zeroed(sizeof(struct semaphore
));
1267 return AE_NO_MEMORY
;
1269 sema_init(sem
, initial_units
);
1271 *handle
= (acpi_handle
*) sem
;
1273 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Creating semaphore[%p|%d].\n",
1274 *handle
, initial_units
));
1280 * TODO: A better way to delete semaphores? Linux doesn't have a
1281 * 'delete_semaphore()' function -- may result in an invalid
1282 * pointer dereference for non-synchronized consumers. Should
1283 * we at least check for blocked threads and signal/cancel them?
1286 acpi_status
acpi_os_delete_semaphore(acpi_handle handle
)
1288 struct semaphore
*sem
= (struct semaphore
*)handle
;
1291 return AE_BAD_PARAMETER
;
1293 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Deleting semaphore[%p].\n", handle
));
1295 BUG_ON(!list_empty(&sem
->wait_list
));
1303 * TODO: Support for units > 1?
1305 acpi_status
acpi_os_wait_semaphore(acpi_handle handle
, u32 units
, u16 timeout
)
1307 acpi_status status
= AE_OK
;
1308 struct semaphore
*sem
= (struct semaphore
*)handle
;
1312 if (!sem
|| (units
< 1))
1313 return AE_BAD_PARAMETER
;
1318 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Waiting for semaphore[%p|%d|%d]\n",
1319 handle
, units
, timeout
));
1321 if (timeout
== ACPI_WAIT_FOREVER
)
1322 jiffies
= MAX_SCHEDULE_TIMEOUT
;
1324 jiffies
= msecs_to_jiffies(timeout
);
1326 ret
= down_timeout(sem
, jiffies
);
1330 if (ACPI_FAILURE(status
)) {
1331 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
,
1332 "Failed to acquire semaphore[%p|%d|%d], %s",
1333 handle
, units
, timeout
,
1334 acpi_format_exception(status
)));
1336 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
,
1337 "Acquired semaphore[%p|%d|%d]", handle
,
1345 * TODO: Support for units > 1?
1347 acpi_status
acpi_os_signal_semaphore(acpi_handle handle
, u32 units
)
1349 struct semaphore
*sem
= (struct semaphore
*)handle
;
1351 if (!sem
|| (units
< 1))
1352 return AE_BAD_PARAMETER
;
1357 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Signaling semaphore[%p|%d]\n", handle
,
1365 #ifdef ACPI_FUTURE_USAGE
1366 u32
acpi_os_get_line(char *buffer
)
1369 #ifdef ENABLE_DEBUGGER
1370 if (acpi_in_debugger
) {
1373 kdb_read(buffer
, sizeof(line_buf
));
1375 /* remove the CR kdb includes */
1376 chars
= strlen(buffer
) - 1;
1377 buffer
[chars
] = '\0';
1383 #endif /* ACPI_FUTURE_USAGE */
1385 acpi_status
acpi_os_signal(u32 function
, void *info
)
1388 case ACPI_SIGNAL_FATAL
:
1389 printk(KERN_ERR PREFIX
"Fatal opcode executed\n");
1391 case ACPI_SIGNAL_BREAKPOINT
:
1394 * ACPI spec. says to treat it as a NOP unless
1395 * you are debugging. So if/when we integrate
1396 * AML debugger into the kernel debugger its
1397 * hook will go here. But until then it is
1398 * not useful to print anything on breakpoints.
1408 static int __init
acpi_os_name_setup(char *str
)
1410 char *p
= acpi_os_name
;
1411 int count
= ACPI_MAX_OVERRIDE_LEN
- 1;
1416 for (; count
-- && *str
; str
++) {
1417 if (isalnum(*str
) || *str
== ' ' || *str
== ':')
1419 else if (*str
== '\'' || *str
== '"')
1430 __setup("acpi_os_name=", acpi_os_name_setup
);
1432 #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
1433 #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */
1435 struct osi_setup_entry
{
1436 char string
[OSI_STRING_LENGTH_MAX
];
1440 static struct osi_setup_entry
1441 osi_setup_entries
[OSI_STRING_ENTRIES_MAX
] __initdata
= {
1442 {"Module Device", true},
1443 {"Processor Device", true},
1444 {"3.0 _SCP Extensions", true},
1445 {"Processor Aggregator Device", true},
1448 void __init
acpi_osi_setup(char *str
)
1450 struct osi_setup_entry
*osi
;
1454 if (!acpi_gbl_create_osi_method
)
1457 if (str
== NULL
|| *str
== '\0') {
1458 printk(KERN_INFO PREFIX
"_OSI method disabled\n");
1459 acpi_gbl_create_osi_method
= FALSE
;
1466 osi_linux
.default_disabling
= 1;
1468 } else if (*str
== '*') {
1469 acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS
);
1470 for (i
= 0; i
< OSI_STRING_ENTRIES_MAX
; i
++) {
1471 osi
= &osi_setup_entries
[i
];
1472 osi
->enable
= false;
1479 for (i
= 0; i
< OSI_STRING_ENTRIES_MAX
; i
++) {
1480 osi
= &osi_setup_entries
[i
];
1481 if (!strcmp(osi
->string
, str
)) {
1482 osi
->enable
= enable
;
1484 } else if (osi
->string
[0] == '\0') {
1485 osi
->enable
= enable
;
1486 strncpy(osi
->string
, str
, OSI_STRING_LENGTH_MAX
);
1492 static void __init
set_osi_linux(unsigned int enable
)
1494 if (osi_linux
.enable
!= enable
)
1495 osi_linux
.enable
= enable
;
1497 if (osi_linux
.enable
)
1498 acpi_osi_setup("Linux");
1500 acpi_osi_setup("!Linux");
1505 static void __init
acpi_cmdline_osi_linux(unsigned int enable
)
1507 osi_linux
.cmdline
= 1; /* cmdline set the default and override DMI */
1509 set_osi_linux(enable
);
1514 void __init
acpi_dmi_osi_linux(int enable
, const struct dmi_system_id
*d
)
1516 printk(KERN_NOTICE PREFIX
"DMI detected: %s\n", d
->ident
);
1521 osi_linux
.dmi
= 1; /* DMI knows that this box asks OSI(Linux) */
1522 set_osi_linux(enable
);
1528 * Modify the list of "OS Interfaces" reported to BIOS via _OSI
1530 * empty string disables _OSI
1531 * string starting with '!' disables that string
1532 * otherwise string is added to list, augmenting built-in strings
1534 static void __init
acpi_osi_setup_late(void)
1536 struct osi_setup_entry
*osi
;
1541 if (osi_linux
.default_disabling
) {
1542 status
= acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS
);
1544 if (ACPI_SUCCESS(status
))
1545 printk(KERN_INFO PREFIX
"Disabled all _OSI OS vendors\n");
1548 for (i
= 0; i
< OSI_STRING_ENTRIES_MAX
; i
++) {
1549 osi
= &osi_setup_entries
[i
];
1555 status
= acpi_install_interface(str
);
1557 if (ACPI_SUCCESS(status
))
1558 printk(KERN_INFO PREFIX
"Added _OSI(%s)\n", str
);
1560 status
= acpi_remove_interface(str
);
1562 if (ACPI_SUCCESS(status
))
1563 printk(KERN_INFO PREFIX
"Deleted _OSI(%s)\n", str
);
1568 static int __init
osi_setup(char *str
)
1570 if (str
&& !strcmp("Linux", str
))
1571 acpi_cmdline_osi_linux(1);
1572 else if (str
&& !strcmp("!Linux", str
))
1573 acpi_cmdline_osi_linux(0);
1575 acpi_osi_setup(str
);
1580 __setup("acpi_osi=", osi_setup
);
1583 * Disable the auto-serialization of named objects creation methods.
1585 * This feature is enabled by default. It marks the AML control methods
1586 * that contain the opcodes to create named objects as "Serialized".
1588 static int __init
acpi_no_auto_serialize_setup(char *str
)
1590 acpi_gbl_auto_serialize_methods
= FALSE
;
1591 pr_info("ACPI: auto-serialization disabled\n");
1596 __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup
);
1598 /* Check of resource interference between native drivers and ACPI
1599 * OperationRegions (SystemIO and System Memory only).
1600 * IO ports and memory declared in ACPI might be used by the ACPI subsystem
1601 * in arbitrary AML code and can interfere with legacy drivers.
1602 * acpi_enforce_resources= can be set to:
1604 * - strict (default) (2)
1605 * -> further driver trying to access the resources will not load
1607 * -> further driver trying to access the resources will load, but you
1608 * get a system message that something might go wrong...
1611 * -> ACPI Operation Region resources will not be registered
1614 #define ENFORCE_RESOURCES_STRICT 2
1615 #define ENFORCE_RESOURCES_LAX 1
1616 #define ENFORCE_RESOURCES_NO 0
1618 static unsigned int acpi_enforce_resources
= ENFORCE_RESOURCES_STRICT
;
1620 static int __init
acpi_enforce_resources_setup(char *str
)
1622 if (str
== NULL
|| *str
== '\0')
1625 if (!strcmp("strict", str
))
1626 acpi_enforce_resources
= ENFORCE_RESOURCES_STRICT
;
1627 else if (!strcmp("lax", str
))
1628 acpi_enforce_resources
= ENFORCE_RESOURCES_LAX
;
1629 else if (!strcmp("no", str
))
1630 acpi_enforce_resources
= ENFORCE_RESOURCES_NO
;
1635 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup
);
1637 /* Check for resource conflicts between ACPI OperationRegions and native
1639 int acpi_check_resource_conflict(const struct resource
*res
)
1641 acpi_adr_space_type space_id
;
1646 if (acpi_enforce_resources
== ENFORCE_RESOURCES_NO
)
1648 if (!(res
->flags
& IORESOURCE_IO
) && !(res
->flags
& IORESOURCE_MEM
))
1651 if (res
->flags
& IORESOURCE_IO
)
1652 space_id
= ACPI_ADR_SPACE_SYSTEM_IO
;
1654 space_id
= ACPI_ADR_SPACE_SYSTEM_MEMORY
;
1656 length
= resource_size(res
);
1657 if (acpi_enforce_resources
!= ENFORCE_RESOURCES_NO
)
1659 clash
= acpi_check_address_range(space_id
, res
->start
, length
, warn
);
1662 if (acpi_enforce_resources
!= ENFORCE_RESOURCES_NO
) {
1663 if (acpi_enforce_resources
== ENFORCE_RESOURCES_LAX
)
1664 printk(KERN_NOTICE
"ACPI: This conflict may"
1665 " cause random problems and system"
1667 printk(KERN_INFO
"ACPI: If an ACPI driver is available"
1668 " for this device, you should use it instead of"
1669 " the native driver\n");
1671 if (acpi_enforce_resources
== ENFORCE_RESOURCES_STRICT
)
1676 EXPORT_SYMBOL(acpi_check_resource_conflict
);
1678 int acpi_check_region(resource_size_t start
, resource_size_t n
,
1681 struct resource res
= {
1683 .end
= start
+ n
- 1,
1685 .flags
= IORESOURCE_IO
,
1688 return acpi_check_resource_conflict(&res
);
1690 EXPORT_SYMBOL(acpi_check_region
);
1693 * Let drivers know whether the resource checks are effective
1695 int acpi_resources_are_enforced(void)
1697 return acpi_enforce_resources
== ENFORCE_RESOURCES_STRICT
;
1699 EXPORT_SYMBOL(acpi_resources_are_enforced
);
1701 bool acpi_osi_is_win8(void)
1703 return acpi_gbl_osi_data
>= ACPI_OSI_WIN_8
;
1705 EXPORT_SYMBOL(acpi_osi_is_win8
);
1708 * Deallocate the memory for a spinlock.
1710 void acpi_os_delete_lock(acpi_spinlock handle
)
1716 * Acquire a spinlock.
1718 * handle is a pointer to the spinlock_t.
1721 acpi_cpu_flags
acpi_os_acquire_lock(acpi_spinlock lockp
)
1723 acpi_cpu_flags flags
;
1724 spin_lock_irqsave(lockp
, flags
);
1729 * Release a spinlock. See above.
1732 void acpi_os_release_lock(acpi_spinlock lockp
, acpi_cpu_flags flags
)
1734 spin_unlock_irqrestore(lockp
, flags
);
1737 #ifndef ACPI_USE_LOCAL_CACHE
1739 /*******************************************************************************
1741 * FUNCTION: acpi_os_create_cache
1743 * PARAMETERS: name - Ascii name for the cache
1744 * size - Size of each cached object
1745 * depth - Maximum depth of the cache (in objects) <ignored>
1746 * cache - Where the new cache object is returned
1750 * DESCRIPTION: Create a cache object
1752 ******************************************************************************/
1755 acpi_os_create_cache(char *name
, u16 size
, u16 depth
, acpi_cache_t
** cache
)
1757 *cache
= kmem_cache_create(name
, size
, 0, 0, NULL
);
1764 /*******************************************************************************
1766 * FUNCTION: acpi_os_purge_cache
1768 * PARAMETERS: Cache - Handle to cache object
1772 * DESCRIPTION: Free all objects within the requested cache.
1774 ******************************************************************************/
1776 acpi_status
acpi_os_purge_cache(acpi_cache_t
* cache
)
1778 kmem_cache_shrink(cache
);
1782 /*******************************************************************************
1784 * FUNCTION: acpi_os_delete_cache
1786 * PARAMETERS: Cache - Handle to cache object
1790 * DESCRIPTION: Free all objects within the requested cache and delete the
1793 ******************************************************************************/
1795 acpi_status
acpi_os_delete_cache(acpi_cache_t
* cache
)
1797 kmem_cache_destroy(cache
);
1801 /*******************************************************************************
1803 * FUNCTION: acpi_os_release_object
1805 * PARAMETERS: Cache - Handle to cache object
1806 * Object - The object to be released
1810 * DESCRIPTION: Release an object to the specified cache. If cache is full,
1811 * the object is deleted.
1813 ******************************************************************************/
1815 acpi_status
acpi_os_release_object(acpi_cache_t
* cache
, void *object
)
1817 kmem_cache_free(cache
, object
);
1822 static int __init
acpi_no_static_ssdt_setup(char *s
)
1824 acpi_gbl_disable_ssdt_table_install
= TRUE
;
1825 pr_info("ACPI: static SSDT installation disabled\n");
1830 early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup
);
1832 static int __init
acpi_disable_return_repair(char *s
)
1834 printk(KERN_NOTICE PREFIX
1835 "ACPI: Predefined validation mechanism disabled\n");
1836 acpi_gbl_disable_auto_repair
= TRUE
;
1841 __setup("acpica_no_return_repair", acpi_disable_return_repair
);
1843 acpi_status __init
acpi_os_initialize(void)
1845 acpi_os_map_generic_address(&acpi_gbl_FADT
.xpm1a_event_block
);
1846 acpi_os_map_generic_address(&acpi_gbl_FADT
.xpm1b_event_block
);
1847 acpi_os_map_generic_address(&acpi_gbl_FADT
.xgpe0_block
);
1848 acpi_os_map_generic_address(&acpi_gbl_FADT
.xgpe1_block
);
1849 if (acpi_gbl_FADT
.flags
& ACPI_FADT_RESET_REGISTER
) {
1851 * Use acpi_os_map_generic_address to pre-map the reset
1852 * register if it's in system memory.
1856 rv
= acpi_os_map_generic_address(&acpi_gbl_FADT
.reset_register
);
1857 pr_debug(PREFIX
"%s: map reset_reg status %d\n", __func__
, rv
);
1863 acpi_status __init
acpi_os_initialize1(void)
1865 acpi_reserve_resources();
1866 kacpid_wq
= alloc_workqueue("kacpid", 0, 1);
1867 kacpi_notify_wq
= alloc_workqueue("kacpi_notify", 0, 1);
1868 kacpi_hotplug_wq
= alloc_ordered_workqueue("kacpi_hotplug", 0);
1870 BUG_ON(!kacpi_notify_wq
);
1871 BUG_ON(!kacpi_hotplug_wq
);
1872 acpi_install_interface_handler(acpi_osi_handler
);
1873 acpi_osi_setup_late();
1877 acpi_status
acpi_os_terminate(void)
1879 if (acpi_irq_handler
) {
1880 acpi_os_remove_interrupt_handler(acpi_gbl_FADT
.sci_interrupt
,
1884 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.xgpe1_block
);
1885 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.xgpe0_block
);
1886 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.xpm1b_event_block
);
1887 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.xpm1a_event_block
);
1888 if (acpi_gbl_FADT
.flags
& ACPI_FADT_RESET_REGISTER
)
1889 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.reset_register
);
1891 destroy_workqueue(kacpid_wq
);
1892 destroy_workqueue(kacpi_notify_wq
);
1893 destroy_workqueue(kacpi_hotplug_wq
);
1898 acpi_status
acpi_os_prepare_sleep(u8 sleep_state
, u32 pm1a_control
,
1902 if (__acpi_os_prepare_sleep
)
1903 rc
= __acpi_os_prepare_sleep(sleep_state
,
1904 pm1a_control
, pm1b_control
);
1908 return AE_CTRL_SKIP
;
1913 void acpi_os_set_prepare_sleep(int (*func
)(u8 sleep_state
,
1914 u32 pm1a_ctrl
, u32 pm1b_ctrl
))
1916 __acpi_os_prepare_sleep
= func
;
1919 acpi_status
acpi_os_prepare_extended_sleep(u8 sleep_state
, u32 val_a
,
1923 if (__acpi_os_prepare_extended_sleep
)
1924 rc
= __acpi_os_prepare_extended_sleep(sleep_state
,
1929 return AE_CTRL_SKIP
;
1934 void acpi_os_set_prepare_extended_sleep(int (*func
)(u8 sleep_state
,
1935 u32 val_a
, u32 val_b
))
1937 __acpi_os_prepare_extended_sleep
= func
;