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 /* Resources are never freed */
179 if (gas
->space_id
== ACPI_ADR_SPACE_SYSTEM_IO
)
180 request_region(addr
, length
, desc
);
181 else if (gas
->space_id
== ACPI_ADR_SPACE_SYSTEM_MEMORY
)
182 request_mem_region(addr
, length
, desc
);
185 static int __init
acpi_reserve_resources(void)
187 acpi_request_region(&acpi_gbl_FADT
.xpm1a_event_block
, acpi_gbl_FADT
.pm1_event_length
,
188 "ACPI PM1a_EVT_BLK");
190 acpi_request_region(&acpi_gbl_FADT
.xpm1b_event_block
, acpi_gbl_FADT
.pm1_event_length
,
191 "ACPI PM1b_EVT_BLK");
193 acpi_request_region(&acpi_gbl_FADT
.xpm1a_control_block
, acpi_gbl_FADT
.pm1_control_length
,
194 "ACPI PM1a_CNT_BLK");
196 acpi_request_region(&acpi_gbl_FADT
.xpm1b_control_block
, acpi_gbl_FADT
.pm1_control_length
,
197 "ACPI PM1b_CNT_BLK");
199 if (acpi_gbl_FADT
.pm_timer_length
== 4)
200 acpi_request_region(&acpi_gbl_FADT
.xpm_timer_block
, 4, "ACPI PM_TMR");
202 acpi_request_region(&acpi_gbl_FADT
.xpm2_control_block
, acpi_gbl_FADT
.pm2_control_length
,
205 /* Length of GPE blocks must be a non-negative multiple of 2 */
207 if (!(acpi_gbl_FADT
.gpe0_block_length
& 0x1))
208 acpi_request_region(&acpi_gbl_FADT
.xgpe0_block
,
209 acpi_gbl_FADT
.gpe0_block_length
, "ACPI GPE0_BLK");
211 if (!(acpi_gbl_FADT
.gpe1_block_length
& 0x1))
212 acpi_request_region(&acpi_gbl_FADT
.xgpe1_block
,
213 acpi_gbl_FADT
.gpe1_block_length
, "ACPI GPE1_BLK");
217 fs_initcall_sync(acpi_reserve_resources
);
219 void acpi_os_printf(const char *fmt
, ...)
223 acpi_os_vprintf(fmt
, args
);
227 void acpi_os_vprintf(const char *fmt
, va_list args
)
229 static char buffer
[512];
231 vsprintf(buffer
, fmt
, args
);
233 #ifdef ENABLE_DEBUGGER
234 if (acpi_in_debugger
) {
235 kdb_printf("%s", buffer
);
237 printk(KERN_CONT
"%s", buffer
);
240 printk(KERN_CONT
"%s", buffer
);
245 static unsigned long acpi_rsdp
;
246 static int __init
setup_acpi_rsdp(char *arg
)
248 if (kstrtoul(arg
, 16, &acpi_rsdp
))
252 early_param("acpi_rsdp", setup_acpi_rsdp
);
255 acpi_physical_address __init
acpi_os_get_root_pointer(void)
262 if (efi_enabled(EFI_CONFIG_TABLES
)) {
263 if (efi
.acpi20
!= EFI_INVALID_TABLE_ADDR
)
265 else if (efi
.acpi
!= EFI_INVALID_TABLE_ADDR
)
268 printk(KERN_ERR PREFIX
269 "System description tables not found\n");
272 } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP
)) {
273 acpi_physical_address pa
= 0;
275 acpi_find_root_pointer(&pa
);
282 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
283 static struct acpi_ioremap
*
284 acpi_map_lookup(acpi_physical_address phys
, acpi_size size
)
286 struct acpi_ioremap
*map
;
288 list_for_each_entry_rcu(map
, &acpi_ioremaps
, list
)
289 if (map
->phys
<= phys
&&
290 phys
+ size
<= map
->phys
+ map
->size
)
296 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
297 static void __iomem
*
298 acpi_map_vaddr_lookup(acpi_physical_address phys
, unsigned int size
)
300 struct acpi_ioremap
*map
;
302 map
= acpi_map_lookup(phys
, size
);
304 return map
->virt
+ (phys
- map
->phys
);
309 void __iomem
*acpi_os_get_iomem(acpi_physical_address phys
, unsigned int size
)
311 struct acpi_ioremap
*map
;
312 void __iomem
*virt
= NULL
;
314 mutex_lock(&acpi_ioremap_lock
);
315 map
= acpi_map_lookup(phys
, size
);
317 virt
= map
->virt
+ (phys
- map
->phys
);
320 mutex_unlock(&acpi_ioremap_lock
);
323 EXPORT_SYMBOL_GPL(acpi_os_get_iomem
);
325 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
326 static struct acpi_ioremap
*
327 acpi_map_lookup_virt(void __iomem
*virt
, acpi_size size
)
329 struct acpi_ioremap
*map
;
331 list_for_each_entry_rcu(map
, &acpi_ioremaps
, list
)
332 if (map
->virt
<= virt
&&
333 virt
+ size
<= map
->virt
+ map
->size
)
339 #if defined(CONFIG_IA64) || defined(CONFIG_ARM64)
340 /* ioremap will take care of cache attributes */
341 #define should_use_kmap(pfn) 0
343 #define should_use_kmap(pfn) page_is_ram(pfn)
346 static void __iomem
*acpi_map(acpi_physical_address pg_off
, unsigned long pg_sz
)
350 pfn
= pg_off
>> PAGE_SHIFT
;
351 if (should_use_kmap(pfn
)) {
352 if (pg_sz
> PAGE_SIZE
)
354 return (void __iomem __force
*)kmap(pfn_to_page(pfn
));
356 return acpi_os_ioremap(pg_off
, pg_sz
);
359 static void acpi_unmap(acpi_physical_address pg_off
, void __iomem
*vaddr
)
363 pfn
= pg_off
>> PAGE_SHIFT
;
364 if (should_use_kmap(pfn
))
365 kunmap(pfn_to_page(pfn
));
370 void __iomem
*__init_refok
371 acpi_os_map_iomem(acpi_physical_address phys
, acpi_size size
)
373 struct acpi_ioremap
*map
;
375 acpi_physical_address pg_off
;
378 if (phys
> ULONG_MAX
) {
379 printk(KERN_ERR PREFIX
"Cannot map memory that high\n");
383 if (!acpi_gbl_permanent_mmap
)
384 return __acpi_map_table((unsigned long)phys
, size
);
386 mutex_lock(&acpi_ioremap_lock
);
387 /* Check if there's a suitable mapping already. */
388 map
= acpi_map_lookup(phys
, size
);
394 map
= kzalloc(sizeof(*map
), GFP_KERNEL
);
396 mutex_unlock(&acpi_ioremap_lock
);
400 pg_off
= round_down(phys
, PAGE_SIZE
);
401 pg_sz
= round_up(phys
+ size
, PAGE_SIZE
) - pg_off
;
402 virt
= acpi_map(pg_off
, pg_sz
);
404 mutex_unlock(&acpi_ioremap_lock
);
409 INIT_LIST_HEAD(&map
->list
);
415 list_add_tail_rcu(&map
->list
, &acpi_ioremaps
);
418 mutex_unlock(&acpi_ioremap_lock
);
419 return map
->virt
+ (phys
- map
->phys
);
421 EXPORT_SYMBOL_GPL(acpi_os_map_iomem
);
424 acpi_os_map_memory(acpi_physical_address phys
, acpi_size size
)
426 return (void *)acpi_os_map_iomem(phys
, size
);
428 EXPORT_SYMBOL_GPL(acpi_os_map_memory
);
430 static void acpi_os_drop_map_ref(struct acpi_ioremap
*map
)
432 if (!--map
->refcount
)
433 list_del_rcu(&map
->list
);
436 static void acpi_os_map_cleanup(struct acpi_ioremap
*map
)
438 if (!map
->refcount
) {
439 synchronize_rcu_expedited();
440 acpi_unmap(map
->phys
, map
->virt
);
445 void __ref
acpi_os_unmap_iomem(void __iomem
*virt
, acpi_size size
)
447 struct acpi_ioremap
*map
;
449 if (!acpi_gbl_permanent_mmap
) {
450 __acpi_unmap_table(virt
, size
);
454 mutex_lock(&acpi_ioremap_lock
);
455 map
= acpi_map_lookup_virt(virt
, size
);
457 mutex_unlock(&acpi_ioremap_lock
);
458 WARN(true, PREFIX
"%s: bad address %p\n", __func__
, virt
);
461 acpi_os_drop_map_ref(map
);
462 mutex_unlock(&acpi_ioremap_lock
);
464 acpi_os_map_cleanup(map
);
466 EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem
);
468 void __ref
acpi_os_unmap_memory(void *virt
, acpi_size size
)
470 return acpi_os_unmap_iomem((void __iomem
*)virt
, size
);
472 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory
);
474 void __init
early_acpi_os_unmap_memory(void __iomem
*virt
, acpi_size size
)
476 if (!acpi_gbl_permanent_mmap
)
477 __acpi_unmap_table(virt
, size
);
480 int acpi_os_map_generic_address(struct acpi_generic_address
*gas
)
485 if (gas
->space_id
!= ACPI_ADR_SPACE_SYSTEM_MEMORY
)
488 /* Handle possible alignment issues */
489 memcpy(&addr
, &gas
->address
, sizeof(addr
));
490 if (!addr
|| !gas
->bit_width
)
493 virt
= acpi_os_map_iomem(addr
, gas
->bit_width
/ 8);
499 EXPORT_SYMBOL(acpi_os_map_generic_address
);
501 void acpi_os_unmap_generic_address(struct acpi_generic_address
*gas
)
504 struct acpi_ioremap
*map
;
506 if (gas
->space_id
!= ACPI_ADR_SPACE_SYSTEM_MEMORY
)
509 /* Handle possible alignment issues */
510 memcpy(&addr
, &gas
->address
, sizeof(addr
));
511 if (!addr
|| !gas
->bit_width
)
514 mutex_lock(&acpi_ioremap_lock
);
515 map
= acpi_map_lookup(addr
, gas
->bit_width
/ 8);
517 mutex_unlock(&acpi_ioremap_lock
);
520 acpi_os_drop_map_ref(map
);
521 mutex_unlock(&acpi_ioremap_lock
);
523 acpi_os_map_cleanup(map
);
525 EXPORT_SYMBOL(acpi_os_unmap_generic_address
);
527 #ifdef ACPI_FUTURE_USAGE
529 acpi_os_get_physical_address(void *virt
, acpi_physical_address
* phys
)
532 return AE_BAD_PARAMETER
;
534 *phys
= virt_to_phys(virt
);
540 #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
541 static bool acpi_rev_override
;
543 int __init
acpi_rev_override_setup(char *str
)
545 acpi_rev_override
= true;
548 __setup("acpi_rev_override", acpi_rev_override_setup
);
550 #define acpi_rev_override false
553 #define ACPI_MAX_OVERRIDE_LEN 100
555 static char acpi_os_name
[ACPI_MAX_OVERRIDE_LEN
];
558 acpi_os_predefined_override(const struct acpi_predefined_names
*init_val
,
561 if (!init_val
|| !new_val
)
562 return AE_BAD_PARAMETER
;
565 if (!memcmp(init_val
->name
, "_OS_", 4) && strlen(acpi_os_name
)) {
566 printk(KERN_INFO PREFIX
"Overriding _OS definition to '%s'\n",
568 *new_val
= acpi_os_name
;
571 if (!memcmp(init_val
->name
, "_REV", 4) && acpi_rev_override
) {
572 printk(KERN_INFO PREFIX
"Overriding _REV return value to 5\n");
573 *new_val
= (char *)5;
579 #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
580 #include <linux/earlycpio.h>
581 #include <linux/memblock.h>
583 static u64 acpi_tables_addr
;
584 static int all_tables_size
;
586 /* Copied from acpica/tbutils.c:acpi_tb_checksum() */
587 static u8 __init
acpi_table_checksum(u8
*buffer
, u32 length
)
590 u8
*end
= buffer
+ length
;
593 sum
= (u8
) (sum
+ *(buffer
++));
597 /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */
598 static const char * const table_sigs
[] = {
599 ACPI_SIG_BERT
, ACPI_SIG_CPEP
, ACPI_SIG_ECDT
, ACPI_SIG_EINJ
,
600 ACPI_SIG_ERST
, ACPI_SIG_HEST
, ACPI_SIG_MADT
, ACPI_SIG_MSCT
,
601 ACPI_SIG_SBST
, ACPI_SIG_SLIT
, ACPI_SIG_SRAT
, ACPI_SIG_ASF
,
602 ACPI_SIG_BOOT
, ACPI_SIG_DBGP
, ACPI_SIG_DMAR
, ACPI_SIG_HPET
,
603 ACPI_SIG_IBFT
, ACPI_SIG_IVRS
, ACPI_SIG_MCFG
, ACPI_SIG_MCHI
,
604 ACPI_SIG_SLIC
, ACPI_SIG_SPCR
, ACPI_SIG_SPMI
, ACPI_SIG_TCPA
,
605 ACPI_SIG_UEFI
, ACPI_SIG_WAET
, ACPI_SIG_WDAT
, ACPI_SIG_WDDT
,
606 ACPI_SIG_WDRT
, ACPI_SIG_DSDT
, ACPI_SIG_FADT
, ACPI_SIG_PSDT
,
607 ACPI_SIG_RSDT
, ACPI_SIG_XSDT
, ACPI_SIG_SSDT
, NULL
};
609 #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
611 #define ACPI_OVERRIDE_TABLES 64
612 static struct cpio_data __initdata acpi_initrd_files
[ACPI_OVERRIDE_TABLES
];
614 #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT)
616 void __init
acpi_initrd_override(void *data
, size_t size
)
618 int sig
, no
, table_nr
= 0, total_offset
= 0;
620 struct acpi_table_header
*table
;
621 char cpio_path
[32] = "kernel/firmware/acpi/";
622 struct cpio_data file
;
624 if (data
== NULL
|| size
== 0)
627 for (no
= 0; no
< ACPI_OVERRIDE_TABLES
; no
++) {
628 file
= find_cpio_data(cpio_path
, data
, size
, &offset
);
635 if (file
.size
< sizeof(struct acpi_table_header
)) {
636 pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n",
637 cpio_path
, file
.name
);
643 for (sig
= 0; table_sigs
[sig
]; sig
++)
644 if (!memcmp(table
->signature
, table_sigs
[sig
], 4))
647 if (!table_sigs
[sig
]) {
648 pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n",
649 cpio_path
, file
.name
);
652 if (file
.size
!= table
->length
) {
653 pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n",
654 cpio_path
, file
.name
);
657 if (acpi_table_checksum(file
.data
, table
->length
)) {
658 pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n",
659 cpio_path
, file
.name
);
663 pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n",
664 table
->signature
, cpio_path
, file
.name
, table
->length
);
666 all_tables_size
+= table
->length
;
667 acpi_initrd_files
[table_nr
].data
= file
.data
;
668 acpi_initrd_files
[table_nr
].size
= file
.size
;
675 memblock_find_in_range(0, max_low_pfn_mapped
<< PAGE_SHIFT
,
676 all_tables_size
, PAGE_SIZE
);
677 if (!acpi_tables_addr
) {
682 * Only calling e820_add_reserve does not work and the
683 * tables are invalid (memory got used) later.
684 * memblock_reserve works as expected and the tables won't get modified.
685 * But it's not enough on X86 because ioremap will
686 * complain later (used by acpi_os_map_memory) that the pages
687 * that should get mapped are not marked "reserved".
688 * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area)
691 memblock_reserve(acpi_tables_addr
, all_tables_size
);
692 arch_reserve_mem_area(acpi_tables_addr
, all_tables_size
);
695 * early_ioremap only can remap 256k one time. If we map all
696 * tables one time, we will hit the limit. Need to map chunks
697 * one by one during copying the same as that in relocate_initrd().
699 for (no
= 0; no
< table_nr
; no
++) {
700 unsigned char *src_p
= acpi_initrd_files
[no
].data
;
701 phys_addr_t size
= acpi_initrd_files
[no
].size
;
702 phys_addr_t dest_addr
= acpi_tables_addr
+ total_offset
;
703 phys_addr_t slop
, clen
;
706 total_offset
+= size
;
709 slop
= dest_addr
& ~PAGE_MASK
;
711 if (clen
> MAP_CHUNK_SIZE
- slop
)
712 clen
= MAP_CHUNK_SIZE
- slop
;
713 dest_p
= early_ioremap(dest_addr
& PAGE_MASK
,
715 memcpy(dest_p
+ slop
, src_p
, clen
);
716 early_iounmap(dest_p
, clen
+ slop
);
723 #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */
725 static void acpi_table_taint(struct acpi_table_header
*table
)
728 "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n",
729 table
->signature
, table
->oem_table_id
);
730 add_taint(TAINT_OVERRIDDEN_ACPI_TABLE
, LOCKDEP_NOW_UNRELIABLE
);
735 acpi_os_table_override(struct acpi_table_header
* existing_table
,
736 struct acpi_table_header
** new_table
)
738 if (!existing_table
|| !new_table
)
739 return AE_BAD_PARAMETER
;
743 #ifdef CONFIG_ACPI_CUSTOM_DSDT
744 if (strncmp(existing_table
->signature
, "DSDT", 4) == 0)
745 *new_table
= (struct acpi_table_header
*)AmlCode
;
747 if (*new_table
!= NULL
)
748 acpi_table_taint(existing_table
);
753 acpi_os_physical_table_override(struct acpi_table_header
*existing_table
,
754 acpi_physical_address
*address
,
757 #ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
762 int table_offset
= 0;
763 struct acpi_table_header
*table
;
768 if (!acpi_tables_addr
)
772 if (table_offset
+ ACPI_HEADER_SIZE
> all_tables_size
) {
777 table
= acpi_os_map_memory(acpi_tables_addr
+ table_offset
,
780 if (table_offset
+ table
->length
> all_tables_size
) {
781 acpi_os_unmap_memory(table
, ACPI_HEADER_SIZE
);
786 table_offset
+= table
->length
;
788 if (memcmp(existing_table
->signature
, table
->signature
, 4)) {
789 acpi_os_unmap_memory(table
,
794 /* Only override tables with matching oem id */
795 if (memcmp(table
->oem_table_id
, existing_table
->oem_table_id
,
796 ACPI_OEM_TABLE_ID_SIZE
)) {
797 acpi_os_unmap_memory(table
,
802 table_offset
-= table
->length
;
803 *table_length
= table
->length
;
804 acpi_os_unmap_memory(table
, ACPI_HEADER_SIZE
);
805 *address
= acpi_tables_addr
+ table_offset
;
807 } while (table_offset
+ ACPI_HEADER_SIZE
< all_tables_size
);
810 acpi_table_taint(existing_table
);
815 static irqreturn_t
acpi_irq(int irq
, void *dev_id
)
819 handled
= (*acpi_irq_handler
) (acpi_irq_context
);
825 acpi_irq_not_handled
++;
831 acpi_os_install_interrupt_handler(u32 gsi
, acpi_osd_handler handler
,
836 acpi_irq_stats_init();
839 * ACPI interrupts different from the SCI in our copy of the FADT are
842 if (gsi
!= acpi_gbl_FADT
.sci_interrupt
)
843 return AE_BAD_PARAMETER
;
845 if (acpi_irq_handler
)
846 return AE_ALREADY_ACQUIRED
;
848 if (acpi_gsi_to_irq(gsi
, &irq
) < 0) {
849 printk(KERN_ERR PREFIX
"SCI (ACPI GSI %d) not registered\n",
854 acpi_irq_handler
= handler
;
855 acpi_irq_context
= context
;
856 if (request_irq(irq
, acpi_irq
, IRQF_SHARED
, "acpi", acpi_irq
)) {
857 printk(KERN_ERR PREFIX
"SCI (IRQ%d) allocation failed\n", irq
);
858 acpi_irq_handler
= NULL
;
859 return AE_NOT_ACQUIRED
;
865 acpi_status
acpi_os_remove_interrupt_handler(u32 irq
, acpi_osd_handler handler
)
867 if (irq
!= acpi_gbl_FADT
.sci_interrupt
)
868 return AE_BAD_PARAMETER
;
870 free_irq(irq
, acpi_irq
);
871 acpi_irq_handler
= NULL
;
877 * Running in interpreter thread context, safe to sleep
880 void acpi_os_sleep(u64 ms
)
885 void acpi_os_stall(u32 us
)
893 touch_nmi_watchdog();
899 * Support ACPI 3.0 AML Timer operand
900 * Returns 64-bit free-running, monotonically increasing timer
901 * with 100ns granularity
903 u64
acpi_os_get_timer(void)
905 u64 time_ns
= ktime_to_ns(ktime_get());
906 do_div(time_ns
, 100);
910 acpi_status
acpi_os_read_port(acpi_io_address port
, u32
* value
, u32 width
)
919 *(u8
*) value
= inb(port
);
920 } else if (width
<= 16) {
921 *(u16
*) value
= inw(port
);
922 } else if (width
<= 32) {
923 *(u32
*) value
= inl(port
);
931 EXPORT_SYMBOL(acpi_os_read_port
);
933 acpi_status
acpi_os_write_port(acpi_io_address port
, u32 value
, u32 width
)
937 } else if (width
<= 16) {
939 } else if (width
<= 32) {
948 EXPORT_SYMBOL(acpi_os_write_port
);
951 static inline u64
read64(const volatile void __iomem
*addr
)
956 static inline u64
read64(const volatile void __iomem
*addr
)
961 return l
| (h
<< 32);
966 acpi_os_read_memory(acpi_physical_address phys_addr
, u64
*value
, u32 width
)
968 void __iomem
*virt_addr
;
969 unsigned int size
= width
/ 8;
974 virt_addr
= acpi_map_vaddr_lookup(phys_addr
, size
);
977 virt_addr
= acpi_os_ioremap(phys_addr
, size
);
979 return AE_BAD_ADDRESS
;
988 *(u8
*) value
= readb(virt_addr
);
991 *(u16
*) value
= readw(virt_addr
);
994 *(u32
*) value
= readl(virt_addr
);
997 *(u64
*) value
= read64(virt_addr
);
1012 static inline void write64(u64 val
, volatile void __iomem
*addr
)
1017 static inline void write64(u64 val
, volatile void __iomem
*addr
)
1020 writel(val
>>32, addr
+4);
1025 acpi_os_write_memory(acpi_physical_address phys_addr
, u64 value
, u32 width
)
1027 void __iomem
*virt_addr
;
1028 unsigned int size
= width
/ 8;
1032 virt_addr
= acpi_map_vaddr_lookup(phys_addr
, size
);
1035 virt_addr
= acpi_os_ioremap(phys_addr
, size
);
1037 return AE_BAD_ADDRESS
;
1043 writeb(value
, virt_addr
);
1046 writew(value
, virt_addr
);
1049 writel(value
, virt_addr
);
1052 write64(value
, virt_addr
);
1067 acpi_os_read_pci_configuration(struct acpi_pci_id
* pci_id
, u32 reg
,
1068 u64
*value
, u32 width
)
1074 return AE_BAD_PARAMETER
;
1090 result
= raw_pci_read(pci_id
->segment
, pci_id
->bus
,
1091 PCI_DEVFN(pci_id
->device
, pci_id
->function
),
1092 reg
, size
, &value32
);
1095 return (result
? AE_ERROR
: AE_OK
);
1099 acpi_os_write_pci_configuration(struct acpi_pci_id
* pci_id
, u32 reg
,
1100 u64 value
, u32 width
)
1118 result
= raw_pci_write(pci_id
->segment
, pci_id
->bus
,
1119 PCI_DEVFN(pci_id
->device
, pci_id
->function
),
1122 return (result
? AE_ERROR
: AE_OK
);
1125 static void acpi_os_execute_deferred(struct work_struct
*work
)
1127 struct acpi_os_dpc
*dpc
= container_of(work
, struct acpi_os_dpc
, work
);
1129 dpc
->function(dpc
->context
);
1133 /*******************************************************************************
1135 * FUNCTION: acpi_os_execute
1137 * PARAMETERS: Type - Type of the callback
1138 * Function - Function to be executed
1139 * Context - Function parameters
1143 * DESCRIPTION: Depending on type, either queues function for deferred execution or
1144 * immediately executes function on a separate thread.
1146 ******************************************************************************/
1148 acpi_status
acpi_os_execute(acpi_execute_type type
,
1149 acpi_osd_exec_callback function
, void *context
)
1151 acpi_status status
= AE_OK
;
1152 struct acpi_os_dpc
*dpc
;
1153 struct workqueue_struct
*queue
;
1155 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
,
1156 "Scheduling function [%p(%p)] for deferred execution.\n",
1157 function
, context
));
1160 * Allocate/initialize DPC structure. Note that this memory will be
1161 * freed by the callee. The kernel handles the work_struct list in a
1162 * way that allows us to also free its memory inside the callee.
1163 * Because we may want to schedule several tasks with different
1164 * parameters we can't use the approach some kernel code uses of
1165 * having a static work_struct.
1168 dpc
= kzalloc(sizeof(struct acpi_os_dpc
), GFP_ATOMIC
);
1170 return AE_NO_MEMORY
;
1172 dpc
->function
= function
;
1173 dpc
->context
= context
;
1176 * To prevent lockdep from complaining unnecessarily, make sure that
1177 * there is a different static lockdep key for each workqueue by using
1178 * INIT_WORK() for each of them separately.
1180 if (type
== OSL_NOTIFY_HANDLER
) {
1181 queue
= kacpi_notify_wq
;
1182 INIT_WORK(&dpc
->work
, acpi_os_execute_deferred
);
1185 INIT_WORK(&dpc
->work
, acpi_os_execute_deferred
);
1189 * On some machines, a software-initiated SMI causes corruption unless
1190 * the SMI runs on CPU 0. An SMI can be initiated by any AML, but
1191 * typically it's done in GPE-related methods that are run via
1192 * workqueues, so we can avoid the known corruption cases by always
1193 * queueing on CPU 0.
1195 ret
= queue_work_on(0, queue
, &dpc
->work
);
1198 printk(KERN_ERR PREFIX
1199 "Call to queue_work() failed.\n");
1205 EXPORT_SYMBOL(acpi_os_execute
);
1207 void acpi_os_wait_events_complete(void)
1210 * Make sure the GPE handler or the fixed event handler is not used
1211 * on another CPU after removal.
1213 if (acpi_irq_handler
)
1214 synchronize_hardirq(acpi_gbl_FADT
.sci_interrupt
);
1215 flush_workqueue(kacpid_wq
);
1216 flush_workqueue(kacpi_notify_wq
);
1219 struct acpi_hp_work
{
1220 struct work_struct work
;
1221 struct acpi_device
*adev
;
1225 static void acpi_hotplug_work_fn(struct work_struct
*work
)
1227 struct acpi_hp_work
*hpw
= container_of(work
, struct acpi_hp_work
, work
);
1229 acpi_os_wait_events_complete();
1230 acpi_device_hotplug(hpw
->adev
, hpw
->src
);
1234 acpi_status
acpi_hotplug_schedule(struct acpi_device
*adev
, u32 src
)
1236 struct acpi_hp_work
*hpw
;
1238 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
,
1239 "Scheduling hotplug event (%p, %u) for deferred execution.\n",
1242 hpw
= kmalloc(sizeof(*hpw
), GFP_KERNEL
);
1244 return AE_NO_MEMORY
;
1246 INIT_WORK(&hpw
->work
, acpi_hotplug_work_fn
);
1250 * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because
1251 * the hotplug code may call driver .remove() functions, which may
1252 * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush
1255 if (!queue_work(kacpi_hotplug_wq
, &hpw
->work
)) {
1262 bool acpi_queue_hotplug_work(struct work_struct
*work
)
1264 return queue_work(kacpi_hotplug_wq
, work
);
1268 acpi_os_create_semaphore(u32 max_units
, u32 initial_units
, acpi_handle
* handle
)
1270 struct semaphore
*sem
= NULL
;
1272 sem
= acpi_os_allocate_zeroed(sizeof(struct semaphore
));
1274 return AE_NO_MEMORY
;
1276 sema_init(sem
, initial_units
);
1278 *handle
= (acpi_handle
*) sem
;
1280 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Creating semaphore[%p|%d].\n",
1281 *handle
, initial_units
));
1287 * TODO: A better way to delete semaphores? Linux doesn't have a
1288 * 'delete_semaphore()' function -- may result in an invalid
1289 * pointer dereference for non-synchronized consumers. Should
1290 * we at least check for blocked threads and signal/cancel them?
1293 acpi_status
acpi_os_delete_semaphore(acpi_handle handle
)
1295 struct semaphore
*sem
= (struct semaphore
*)handle
;
1298 return AE_BAD_PARAMETER
;
1300 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Deleting semaphore[%p].\n", handle
));
1302 BUG_ON(!list_empty(&sem
->wait_list
));
1310 * TODO: Support for units > 1?
1312 acpi_status
acpi_os_wait_semaphore(acpi_handle handle
, u32 units
, u16 timeout
)
1314 acpi_status status
= AE_OK
;
1315 struct semaphore
*sem
= (struct semaphore
*)handle
;
1319 if (!sem
|| (units
< 1))
1320 return AE_BAD_PARAMETER
;
1325 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Waiting for semaphore[%p|%d|%d]\n",
1326 handle
, units
, timeout
));
1328 if (timeout
== ACPI_WAIT_FOREVER
)
1329 jiffies
= MAX_SCHEDULE_TIMEOUT
;
1331 jiffies
= msecs_to_jiffies(timeout
);
1333 ret
= down_timeout(sem
, jiffies
);
1337 if (ACPI_FAILURE(status
)) {
1338 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
,
1339 "Failed to acquire semaphore[%p|%d|%d], %s",
1340 handle
, units
, timeout
,
1341 acpi_format_exception(status
)));
1343 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
,
1344 "Acquired semaphore[%p|%d|%d]", handle
,
1352 * TODO: Support for units > 1?
1354 acpi_status
acpi_os_signal_semaphore(acpi_handle handle
, u32 units
)
1356 struct semaphore
*sem
= (struct semaphore
*)handle
;
1358 if (!sem
|| (units
< 1))
1359 return AE_BAD_PARAMETER
;
1364 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Signaling semaphore[%p|%d]\n", handle
,
1372 #ifdef ACPI_FUTURE_USAGE
1373 u32
acpi_os_get_line(char *buffer
)
1376 #ifdef ENABLE_DEBUGGER
1377 if (acpi_in_debugger
) {
1380 kdb_read(buffer
, sizeof(line_buf
));
1382 /* remove the CR kdb includes */
1383 chars
= strlen(buffer
) - 1;
1384 buffer
[chars
] = '\0';
1390 #endif /* ACPI_FUTURE_USAGE */
1392 acpi_status
acpi_os_signal(u32 function
, void *info
)
1395 case ACPI_SIGNAL_FATAL
:
1396 printk(KERN_ERR PREFIX
"Fatal opcode executed\n");
1398 case ACPI_SIGNAL_BREAKPOINT
:
1401 * ACPI spec. says to treat it as a NOP unless
1402 * you are debugging. So if/when we integrate
1403 * AML debugger into the kernel debugger its
1404 * hook will go here. But until then it is
1405 * not useful to print anything on breakpoints.
1415 static int __init
acpi_os_name_setup(char *str
)
1417 char *p
= acpi_os_name
;
1418 int count
= ACPI_MAX_OVERRIDE_LEN
- 1;
1423 for (; count
-- && *str
; str
++) {
1424 if (isalnum(*str
) || *str
== ' ' || *str
== ':')
1426 else if (*str
== '\'' || *str
== '"')
1437 __setup("acpi_os_name=", acpi_os_name_setup
);
1439 #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
1440 #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */
1442 struct osi_setup_entry
{
1443 char string
[OSI_STRING_LENGTH_MAX
];
1447 static struct osi_setup_entry
1448 osi_setup_entries
[OSI_STRING_ENTRIES_MAX
] __initdata
= {
1449 {"Module Device", true},
1450 {"Processor Device", true},
1451 {"3.0 _SCP Extensions", true},
1452 {"Processor Aggregator Device", true},
1455 void __init
acpi_osi_setup(char *str
)
1457 struct osi_setup_entry
*osi
;
1461 if (!acpi_gbl_create_osi_method
)
1464 if (str
== NULL
|| *str
== '\0') {
1465 printk(KERN_INFO PREFIX
"_OSI method disabled\n");
1466 acpi_gbl_create_osi_method
= FALSE
;
1473 osi_linux
.default_disabling
= 1;
1475 } else if (*str
== '*') {
1476 acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS
);
1477 for (i
= 0; i
< OSI_STRING_ENTRIES_MAX
; i
++) {
1478 osi
= &osi_setup_entries
[i
];
1479 osi
->enable
= false;
1486 for (i
= 0; i
< OSI_STRING_ENTRIES_MAX
; i
++) {
1487 osi
= &osi_setup_entries
[i
];
1488 if (!strcmp(osi
->string
, str
)) {
1489 osi
->enable
= enable
;
1491 } else if (osi
->string
[0] == '\0') {
1492 osi
->enable
= enable
;
1493 strncpy(osi
->string
, str
, OSI_STRING_LENGTH_MAX
);
1499 static void __init
set_osi_linux(unsigned int enable
)
1501 if (osi_linux
.enable
!= enable
)
1502 osi_linux
.enable
= enable
;
1504 if (osi_linux
.enable
)
1505 acpi_osi_setup("Linux");
1507 acpi_osi_setup("!Linux");
1512 static void __init
acpi_cmdline_osi_linux(unsigned int enable
)
1514 osi_linux
.cmdline
= 1; /* cmdline set the default and override DMI */
1516 set_osi_linux(enable
);
1521 void __init
acpi_dmi_osi_linux(int enable
, const struct dmi_system_id
*d
)
1523 printk(KERN_NOTICE PREFIX
"DMI detected: %s\n", d
->ident
);
1528 osi_linux
.dmi
= 1; /* DMI knows that this box asks OSI(Linux) */
1529 set_osi_linux(enable
);
1535 * Modify the list of "OS Interfaces" reported to BIOS via _OSI
1537 * empty string disables _OSI
1538 * string starting with '!' disables that string
1539 * otherwise string is added to list, augmenting built-in strings
1541 static void __init
acpi_osi_setup_late(void)
1543 struct osi_setup_entry
*osi
;
1548 if (osi_linux
.default_disabling
) {
1549 status
= acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS
);
1551 if (ACPI_SUCCESS(status
))
1552 printk(KERN_INFO PREFIX
"Disabled all _OSI OS vendors\n");
1555 for (i
= 0; i
< OSI_STRING_ENTRIES_MAX
; i
++) {
1556 osi
= &osi_setup_entries
[i
];
1562 status
= acpi_install_interface(str
);
1564 if (ACPI_SUCCESS(status
))
1565 printk(KERN_INFO PREFIX
"Added _OSI(%s)\n", str
);
1567 status
= acpi_remove_interface(str
);
1569 if (ACPI_SUCCESS(status
))
1570 printk(KERN_INFO PREFIX
"Deleted _OSI(%s)\n", str
);
1575 static int __init
osi_setup(char *str
)
1577 if (str
&& !strcmp("Linux", str
))
1578 acpi_cmdline_osi_linux(1);
1579 else if (str
&& !strcmp("!Linux", str
))
1580 acpi_cmdline_osi_linux(0);
1582 acpi_osi_setup(str
);
1587 __setup("acpi_osi=", osi_setup
);
1590 * Disable the auto-serialization of named objects creation methods.
1592 * This feature is enabled by default. It marks the AML control methods
1593 * that contain the opcodes to create named objects as "Serialized".
1595 static int __init
acpi_no_auto_serialize_setup(char *str
)
1597 acpi_gbl_auto_serialize_methods
= FALSE
;
1598 pr_info("ACPI: auto-serialization disabled\n");
1603 __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup
);
1605 /* Check of resource interference between native drivers and ACPI
1606 * OperationRegions (SystemIO and System Memory only).
1607 * IO ports and memory declared in ACPI might be used by the ACPI subsystem
1608 * in arbitrary AML code and can interfere with legacy drivers.
1609 * acpi_enforce_resources= can be set to:
1611 * - strict (default) (2)
1612 * -> further driver trying to access the resources will not load
1614 * -> further driver trying to access the resources will load, but you
1615 * get a system message that something might go wrong...
1618 * -> ACPI Operation Region resources will not be registered
1621 #define ENFORCE_RESOURCES_STRICT 2
1622 #define ENFORCE_RESOURCES_LAX 1
1623 #define ENFORCE_RESOURCES_NO 0
1625 static unsigned int acpi_enforce_resources
= ENFORCE_RESOURCES_STRICT
;
1627 static int __init
acpi_enforce_resources_setup(char *str
)
1629 if (str
== NULL
|| *str
== '\0')
1632 if (!strcmp("strict", str
))
1633 acpi_enforce_resources
= ENFORCE_RESOURCES_STRICT
;
1634 else if (!strcmp("lax", str
))
1635 acpi_enforce_resources
= ENFORCE_RESOURCES_LAX
;
1636 else if (!strcmp("no", str
))
1637 acpi_enforce_resources
= ENFORCE_RESOURCES_NO
;
1642 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup
);
1644 /* Check for resource conflicts between ACPI OperationRegions and native
1646 int acpi_check_resource_conflict(const struct resource
*res
)
1648 acpi_adr_space_type space_id
;
1653 if (acpi_enforce_resources
== ENFORCE_RESOURCES_NO
)
1655 if (!(res
->flags
& IORESOURCE_IO
) && !(res
->flags
& IORESOURCE_MEM
))
1658 if (res
->flags
& IORESOURCE_IO
)
1659 space_id
= ACPI_ADR_SPACE_SYSTEM_IO
;
1661 space_id
= ACPI_ADR_SPACE_SYSTEM_MEMORY
;
1663 length
= resource_size(res
);
1664 if (acpi_enforce_resources
!= ENFORCE_RESOURCES_NO
)
1666 clash
= acpi_check_address_range(space_id
, res
->start
, length
, warn
);
1669 if (acpi_enforce_resources
!= ENFORCE_RESOURCES_NO
) {
1670 if (acpi_enforce_resources
== ENFORCE_RESOURCES_LAX
)
1671 printk(KERN_NOTICE
"ACPI: This conflict may"
1672 " cause random problems and system"
1674 printk(KERN_INFO
"ACPI: If an ACPI driver is available"
1675 " for this device, you should use it instead of"
1676 " the native driver\n");
1678 if (acpi_enforce_resources
== ENFORCE_RESOURCES_STRICT
)
1683 EXPORT_SYMBOL(acpi_check_resource_conflict
);
1685 int acpi_check_region(resource_size_t start
, resource_size_t n
,
1688 struct resource res
= {
1690 .end
= start
+ n
- 1,
1692 .flags
= IORESOURCE_IO
,
1695 return acpi_check_resource_conflict(&res
);
1697 EXPORT_SYMBOL(acpi_check_region
);
1700 * Let drivers know whether the resource checks are effective
1702 int acpi_resources_are_enforced(void)
1704 return acpi_enforce_resources
== ENFORCE_RESOURCES_STRICT
;
1706 EXPORT_SYMBOL(acpi_resources_are_enforced
);
1708 bool acpi_osi_is_win8(void)
1710 return acpi_gbl_osi_data
>= ACPI_OSI_WIN_8
;
1712 EXPORT_SYMBOL(acpi_osi_is_win8
);
1715 * Deallocate the memory for a spinlock.
1717 void acpi_os_delete_lock(acpi_spinlock handle
)
1723 * Acquire a spinlock.
1725 * handle is a pointer to the spinlock_t.
1728 acpi_cpu_flags
acpi_os_acquire_lock(acpi_spinlock lockp
)
1730 acpi_cpu_flags flags
;
1731 spin_lock_irqsave(lockp
, flags
);
1736 * Release a spinlock. See above.
1739 void acpi_os_release_lock(acpi_spinlock lockp
, acpi_cpu_flags flags
)
1741 spin_unlock_irqrestore(lockp
, flags
);
1744 #ifndef ACPI_USE_LOCAL_CACHE
1746 /*******************************************************************************
1748 * FUNCTION: acpi_os_create_cache
1750 * PARAMETERS: name - Ascii name for the cache
1751 * size - Size of each cached object
1752 * depth - Maximum depth of the cache (in objects) <ignored>
1753 * cache - Where the new cache object is returned
1757 * DESCRIPTION: Create a cache object
1759 ******************************************************************************/
1762 acpi_os_create_cache(char *name
, u16 size
, u16 depth
, acpi_cache_t
** cache
)
1764 *cache
= kmem_cache_create(name
, size
, 0, 0, NULL
);
1771 /*******************************************************************************
1773 * FUNCTION: acpi_os_purge_cache
1775 * PARAMETERS: Cache - Handle to cache object
1779 * DESCRIPTION: Free all objects within the requested cache.
1781 ******************************************************************************/
1783 acpi_status
acpi_os_purge_cache(acpi_cache_t
* cache
)
1785 kmem_cache_shrink(cache
);
1789 /*******************************************************************************
1791 * FUNCTION: acpi_os_delete_cache
1793 * PARAMETERS: Cache - Handle to cache object
1797 * DESCRIPTION: Free all objects within the requested cache and delete the
1800 ******************************************************************************/
1802 acpi_status
acpi_os_delete_cache(acpi_cache_t
* cache
)
1804 kmem_cache_destroy(cache
);
1808 /*******************************************************************************
1810 * FUNCTION: acpi_os_release_object
1812 * PARAMETERS: Cache - Handle to cache object
1813 * Object - The object to be released
1817 * DESCRIPTION: Release an object to the specified cache. If cache is full,
1818 * the object is deleted.
1820 ******************************************************************************/
1822 acpi_status
acpi_os_release_object(acpi_cache_t
* cache
, void *object
)
1824 kmem_cache_free(cache
, object
);
1829 static int __init
acpi_no_static_ssdt_setup(char *s
)
1831 acpi_gbl_disable_ssdt_table_install
= TRUE
;
1832 pr_info("ACPI: static SSDT installation disabled\n");
1837 early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup
);
1839 static int __init
acpi_disable_return_repair(char *s
)
1841 printk(KERN_NOTICE PREFIX
1842 "ACPI: Predefined validation mechanism disabled\n");
1843 acpi_gbl_disable_auto_repair
= TRUE
;
1848 __setup("acpica_no_return_repair", acpi_disable_return_repair
);
1850 acpi_status __init
acpi_os_initialize(void)
1852 acpi_os_map_generic_address(&acpi_gbl_FADT
.xpm1a_event_block
);
1853 acpi_os_map_generic_address(&acpi_gbl_FADT
.xpm1b_event_block
);
1854 acpi_os_map_generic_address(&acpi_gbl_FADT
.xgpe0_block
);
1855 acpi_os_map_generic_address(&acpi_gbl_FADT
.xgpe1_block
);
1856 if (acpi_gbl_FADT
.flags
& ACPI_FADT_RESET_REGISTER
) {
1858 * Use acpi_os_map_generic_address to pre-map the reset
1859 * register if it's in system memory.
1863 rv
= acpi_os_map_generic_address(&acpi_gbl_FADT
.reset_register
);
1864 pr_debug(PREFIX
"%s: map reset_reg status %d\n", __func__
, rv
);
1870 acpi_status __init
acpi_os_initialize1(void)
1872 kacpid_wq
= alloc_workqueue("kacpid", 0, 1);
1873 kacpi_notify_wq
= alloc_workqueue("kacpi_notify", 0, 1);
1874 kacpi_hotplug_wq
= alloc_ordered_workqueue("kacpi_hotplug", 0);
1876 BUG_ON(!kacpi_notify_wq
);
1877 BUG_ON(!kacpi_hotplug_wq
);
1878 acpi_install_interface_handler(acpi_osi_handler
);
1879 acpi_osi_setup_late();
1883 acpi_status
acpi_os_terminate(void)
1885 if (acpi_irq_handler
) {
1886 acpi_os_remove_interrupt_handler(acpi_gbl_FADT
.sci_interrupt
,
1890 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.xgpe1_block
);
1891 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.xgpe0_block
);
1892 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.xpm1b_event_block
);
1893 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.xpm1a_event_block
);
1894 if (acpi_gbl_FADT
.flags
& ACPI_FADT_RESET_REGISTER
)
1895 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.reset_register
);
1897 destroy_workqueue(kacpid_wq
);
1898 destroy_workqueue(kacpi_notify_wq
);
1899 destroy_workqueue(kacpi_hotplug_wq
);
1904 acpi_status
acpi_os_prepare_sleep(u8 sleep_state
, u32 pm1a_control
,
1908 if (__acpi_os_prepare_sleep
)
1909 rc
= __acpi_os_prepare_sleep(sleep_state
,
1910 pm1a_control
, pm1b_control
);
1914 return AE_CTRL_SKIP
;
1919 void acpi_os_set_prepare_sleep(int (*func
)(u8 sleep_state
,
1920 u32 pm1a_ctrl
, u32 pm1b_ctrl
))
1922 __acpi_os_prepare_sleep
= func
;
1925 acpi_status
acpi_os_prepare_extended_sleep(u8 sleep_state
, u32 val_a
,
1929 if (__acpi_os_prepare_extended_sleep
)
1930 rc
= __acpi_os_prepare_extended_sleep(sleep_state
,
1935 return AE_CTRL_SKIP
;
1940 void acpi_os_set_prepare_extended_sleep(int (*func
)(u8 sleep_state
,
1941 u32 val_a
, u32 val_b
))
1943 __acpi_os_prepare_extended_sleep
= func
;