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 <asm-generic/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
);
70 extern char line_buf
[80];
71 #endif /*ENABLE_DEBUGGER */
73 static int (*__acpi_os_prepare_sleep
)(u8 sleep_state
, u32 pm1a_ctrl
,
75 static int (*__acpi_os_prepare_extended_sleep
)(u8 sleep_state
, u32 val_a
,
78 static acpi_osd_handler acpi_irq_handler
;
79 static void *acpi_irq_context
;
80 static struct workqueue_struct
*kacpid_wq
;
81 static struct workqueue_struct
*kacpi_notify_wq
;
82 static struct workqueue_struct
*kacpi_hotplug_wq
;
83 static bool acpi_os_initialized
;
86 * This list of permanent mappings is for memory that may be accessed from
87 * interrupt context, where we can't do the ioremap().
90 struct list_head list
;
92 acpi_physical_address phys
;
94 unsigned long refcount
;
97 static LIST_HEAD(acpi_ioremaps
);
98 static DEFINE_MUTEX(acpi_ioremap_lock
);
100 static void __init
acpi_osi_setup_late(void);
103 * The story of _OSI(Linux)
105 * From pre-history through Linux-2.6.22,
106 * Linux responded TRUE upon a BIOS OSI(Linux) query.
108 * Unfortunately, reference BIOS writers got wind of this
109 * and put OSI(Linux) in their example code, quickly exposing
110 * this string as ill-conceived and opening the door to
111 * an un-bounded number of BIOS incompatibilities.
113 * For example, OSI(Linux) was used on resume to re-POST a
114 * video card on one system, because Linux at that time
115 * could not do a speedy restore in its native driver.
116 * But then upon gaining quick native restore capability,
117 * Linux has no way to tell the BIOS to skip the time-consuming
118 * POST -- putting Linux at a permanent performance disadvantage.
119 * On another system, the BIOS writer used OSI(Linux)
120 * to infer native OS support for IPMI! On other systems,
121 * OSI(Linux) simply got in the way of Linux claiming to
122 * be compatible with other operating systems, exposing
123 * BIOS issues such as skipped device initialization.
125 * So "Linux" turned out to be a really poor chose of
126 * OSI string, and from Linux-2.6.23 onward we respond FALSE.
128 * BIOS writers should NOT query _OSI(Linux) on future systems.
129 * Linux will complain on the console when it sees it, and return FALSE.
130 * To get Linux to return TRUE for your system will require
131 * a kernel source update to add a DMI entry,
132 * or boot with "acpi_osi=Linux"
135 static struct osi_linux
{
136 unsigned int enable
:1;
138 unsigned int cmdline
:1;
139 unsigned int default_disabling
:1;
140 } osi_linux
= {0, 0, 0, 0};
142 static u32
acpi_osi_handler(acpi_string interface
, u32 supported
)
144 if (!strcmp("Linux", interface
)) {
146 printk_once(KERN_NOTICE FW_BUG PREFIX
147 "BIOS _OSI(Linux) query %s%s\n",
148 osi_linux
.enable
? "honored" : "ignored",
149 osi_linux
.cmdline
? " via cmdline" :
150 osi_linux
.dmi
? " via DMI" : "");
153 if (!strcmp("Darwin", interface
)) {
155 * Apple firmware will behave poorly if it receives positive
156 * answers to "Darwin" and any other OS. Respond positively
157 * to Darwin and then disable all other vendor strings.
159 acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS
);
160 supported
= ACPI_UINT32_MAX
;
166 static void __init
acpi_request_region (struct acpi_generic_address
*gas
,
167 unsigned int length
, char *desc
)
171 /* Handle possible alignment issues */
172 memcpy(&addr
, &gas
->address
, sizeof(addr
));
173 if (!addr
|| !length
)
176 /* Resources are never freed */
177 if (gas
->space_id
== ACPI_ADR_SPACE_SYSTEM_IO
)
178 request_region(addr
, length
, desc
);
179 else if (gas
->space_id
== ACPI_ADR_SPACE_SYSTEM_MEMORY
)
180 request_mem_region(addr
, length
, desc
);
183 static int __init
acpi_reserve_resources(void)
185 acpi_request_region(&acpi_gbl_FADT
.xpm1a_event_block
, acpi_gbl_FADT
.pm1_event_length
,
186 "ACPI PM1a_EVT_BLK");
188 acpi_request_region(&acpi_gbl_FADT
.xpm1b_event_block
, acpi_gbl_FADT
.pm1_event_length
,
189 "ACPI PM1b_EVT_BLK");
191 acpi_request_region(&acpi_gbl_FADT
.xpm1a_control_block
, acpi_gbl_FADT
.pm1_control_length
,
192 "ACPI PM1a_CNT_BLK");
194 acpi_request_region(&acpi_gbl_FADT
.xpm1b_control_block
, acpi_gbl_FADT
.pm1_control_length
,
195 "ACPI PM1b_CNT_BLK");
197 if (acpi_gbl_FADT
.pm_timer_length
== 4)
198 acpi_request_region(&acpi_gbl_FADT
.xpm_timer_block
, 4, "ACPI PM_TMR");
200 acpi_request_region(&acpi_gbl_FADT
.xpm2_control_block
, acpi_gbl_FADT
.pm2_control_length
,
203 /* Length of GPE blocks must be a non-negative multiple of 2 */
205 if (!(acpi_gbl_FADT
.gpe0_block_length
& 0x1))
206 acpi_request_region(&acpi_gbl_FADT
.xgpe0_block
,
207 acpi_gbl_FADT
.gpe0_block_length
, "ACPI GPE0_BLK");
209 if (!(acpi_gbl_FADT
.gpe1_block_length
& 0x1))
210 acpi_request_region(&acpi_gbl_FADT
.xgpe1_block
,
211 acpi_gbl_FADT
.gpe1_block_length
, "ACPI GPE1_BLK");
215 fs_initcall_sync(acpi_reserve_resources
);
217 void acpi_os_printf(const char *fmt
, ...)
221 acpi_os_vprintf(fmt
, args
);
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 printk(KERN_CONT
"%s", buffer
);
243 static unsigned long acpi_rsdp
;
244 static int __init
setup_acpi_rsdp(char *arg
)
246 if (kstrtoul(arg
, 16, &acpi_rsdp
))
250 early_param("acpi_rsdp", setup_acpi_rsdp
);
253 acpi_physical_address __init
acpi_os_get_root_pointer(void)
260 if (efi_enabled(EFI_CONFIG_TABLES
)) {
261 if (efi
.acpi20
!= EFI_INVALID_TABLE_ADDR
)
263 else if (efi
.acpi
!= EFI_INVALID_TABLE_ADDR
)
266 printk(KERN_ERR PREFIX
267 "System description tables not found\n");
270 } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP
)) {
271 acpi_physical_address pa
= 0;
273 acpi_find_root_pointer(&pa
);
280 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
281 static struct acpi_ioremap
*
282 acpi_map_lookup(acpi_physical_address phys
, acpi_size size
)
284 struct acpi_ioremap
*map
;
286 list_for_each_entry_rcu(map
, &acpi_ioremaps
, list
)
287 if (map
->phys
<= phys
&&
288 phys
+ size
<= map
->phys
+ map
->size
)
294 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
295 static void __iomem
*
296 acpi_map_vaddr_lookup(acpi_physical_address phys
, unsigned int size
)
298 struct acpi_ioremap
*map
;
300 map
= acpi_map_lookup(phys
, size
);
302 return map
->virt
+ (phys
- map
->phys
);
307 void __iomem
*acpi_os_get_iomem(acpi_physical_address phys
, unsigned int size
)
309 struct acpi_ioremap
*map
;
310 void __iomem
*virt
= NULL
;
312 mutex_lock(&acpi_ioremap_lock
);
313 map
= acpi_map_lookup(phys
, size
);
315 virt
= map
->virt
+ (phys
- map
->phys
);
318 mutex_unlock(&acpi_ioremap_lock
);
321 EXPORT_SYMBOL_GPL(acpi_os_get_iomem
);
323 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
324 static struct acpi_ioremap
*
325 acpi_map_lookup_virt(void __iomem
*virt
, acpi_size size
)
327 struct acpi_ioremap
*map
;
329 list_for_each_entry_rcu(map
, &acpi_ioremaps
, list
)
330 if (map
->virt
<= virt
&&
331 virt
+ size
<= map
->virt
+ map
->size
)
337 #if defined(CONFIG_IA64) || defined(CONFIG_ARM64)
338 /* ioremap will take care of cache attributes */
339 #define should_use_kmap(pfn) 0
341 #define should_use_kmap(pfn) page_is_ram(pfn)
344 static void __iomem
*acpi_map(acpi_physical_address pg_off
, unsigned long pg_sz
)
348 pfn
= pg_off
>> PAGE_SHIFT
;
349 if (should_use_kmap(pfn
)) {
350 if (pg_sz
> PAGE_SIZE
)
352 return (void __iomem __force
*)kmap(pfn_to_page(pfn
));
354 return acpi_os_ioremap(pg_off
, pg_sz
);
357 static void acpi_unmap(acpi_physical_address pg_off
, void __iomem
*vaddr
)
361 pfn
= pg_off
>> PAGE_SHIFT
;
362 if (should_use_kmap(pfn
))
363 kunmap(pfn_to_page(pfn
));
368 void __iomem
*__init_refok
369 acpi_os_map_iomem(acpi_physical_address phys
, acpi_size size
)
371 struct acpi_ioremap
*map
;
373 acpi_physical_address pg_off
;
376 if (phys
> ULONG_MAX
) {
377 printk(KERN_ERR PREFIX
"Cannot map memory that high\n");
381 if (!acpi_gbl_permanent_mmap
)
382 return __acpi_map_table((unsigned long)phys
, size
);
384 mutex_lock(&acpi_ioremap_lock
);
385 /* Check if there's a suitable mapping already. */
386 map
= acpi_map_lookup(phys
, size
);
392 map
= kzalloc(sizeof(*map
), GFP_KERNEL
);
394 mutex_unlock(&acpi_ioremap_lock
);
398 pg_off
= round_down(phys
, PAGE_SIZE
);
399 pg_sz
= round_up(phys
+ size
, PAGE_SIZE
) - pg_off
;
400 virt
= acpi_map(pg_off
, pg_sz
);
402 mutex_unlock(&acpi_ioremap_lock
);
407 INIT_LIST_HEAD(&map
->list
);
413 list_add_tail_rcu(&map
->list
, &acpi_ioremaps
);
416 mutex_unlock(&acpi_ioremap_lock
);
417 return map
->virt
+ (phys
- map
->phys
);
419 EXPORT_SYMBOL_GPL(acpi_os_map_iomem
);
422 acpi_os_map_memory(acpi_physical_address phys
, acpi_size size
)
424 return (void *)acpi_os_map_iomem(phys
, size
);
426 EXPORT_SYMBOL_GPL(acpi_os_map_memory
);
428 static void acpi_os_drop_map_ref(struct acpi_ioremap
*map
)
430 if (!--map
->refcount
)
431 list_del_rcu(&map
->list
);
434 static void acpi_os_map_cleanup(struct acpi_ioremap
*map
)
436 if (!map
->refcount
) {
437 synchronize_rcu_expedited();
438 acpi_unmap(map
->phys
, map
->virt
);
443 void __ref
acpi_os_unmap_iomem(void __iomem
*virt
, acpi_size size
)
445 struct acpi_ioremap
*map
;
447 if (!acpi_gbl_permanent_mmap
) {
448 __acpi_unmap_table(virt
, size
);
452 mutex_lock(&acpi_ioremap_lock
);
453 map
= acpi_map_lookup_virt(virt
, size
);
455 mutex_unlock(&acpi_ioremap_lock
);
456 WARN(true, PREFIX
"%s: bad address %p\n", __func__
, virt
);
459 acpi_os_drop_map_ref(map
);
460 mutex_unlock(&acpi_ioremap_lock
);
462 acpi_os_map_cleanup(map
);
464 EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem
);
466 void __ref
acpi_os_unmap_memory(void *virt
, acpi_size size
)
468 return acpi_os_unmap_iomem((void __iomem
*)virt
, size
);
470 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory
);
472 void __init
early_acpi_os_unmap_memory(void __iomem
*virt
, acpi_size size
)
474 if (!acpi_gbl_permanent_mmap
)
475 __acpi_unmap_table(virt
, size
);
478 int acpi_os_map_generic_address(struct acpi_generic_address
*gas
)
483 if (gas
->space_id
!= ACPI_ADR_SPACE_SYSTEM_MEMORY
)
486 /* Handle possible alignment issues */
487 memcpy(&addr
, &gas
->address
, sizeof(addr
));
488 if (!addr
|| !gas
->bit_width
)
491 virt
= acpi_os_map_iomem(addr
, gas
->bit_width
/ 8);
497 EXPORT_SYMBOL(acpi_os_map_generic_address
);
499 void acpi_os_unmap_generic_address(struct acpi_generic_address
*gas
)
502 struct acpi_ioremap
*map
;
504 if (gas
->space_id
!= ACPI_ADR_SPACE_SYSTEM_MEMORY
)
507 /* Handle possible alignment issues */
508 memcpy(&addr
, &gas
->address
, sizeof(addr
));
509 if (!addr
|| !gas
->bit_width
)
512 mutex_lock(&acpi_ioremap_lock
);
513 map
= acpi_map_lookup(addr
, gas
->bit_width
/ 8);
515 mutex_unlock(&acpi_ioremap_lock
);
518 acpi_os_drop_map_ref(map
);
519 mutex_unlock(&acpi_ioremap_lock
);
521 acpi_os_map_cleanup(map
);
523 EXPORT_SYMBOL(acpi_os_unmap_generic_address
);
525 #ifdef ACPI_FUTURE_USAGE
527 acpi_os_get_physical_address(void *virt
, acpi_physical_address
* phys
)
530 return AE_BAD_PARAMETER
;
532 *phys
= virt_to_phys(virt
);
538 #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
539 static bool acpi_rev_override
;
541 int __init
acpi_rev_override_setup(char *str
)
543 acpi_rev_override
= true;
546 __setup("acpi_rev_override", acpi_rev_override_setup
);
548 #define acpi_rev_override false
551 #define ACPI_MAX_OVERRIDE_LEN 100
553 static char acpi_os_name
[ACPI_MAX_OVERRIDE_LEN
];
556 acpi_os_predefined_override(const struct acpi_predefined_names
*init_val
,
559 if (!init_val
|| !new_val
)
560 return AE_BAD_PARAMETER
;
563 if (!memcmp(init_val
->name
, "_OS_", 4) && strlen(acpi_os_name
)) {
564 printk(KERN_INFO PREFIX
"Overriding _OS definition to '%s'\n",
566 *new_val
= acpi_os_name
;
569 if (!memcmp(init_val
->name
, "_REV", 4) && acpi_rev_override
) {
570 printk(KERN_INFO PREFIX
"Overriding _REV return value to 5\n");
571 *new_val
= (char *)5;
577 #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
578 #include <linux/earlycpio.h>
579 #include <linux/memblock.h>
581 static u64 acpi_tables_addr
;
582 static int all_tables_size
;
584 /* Copied from acpica/tbutils.c:acpi_tb_checksum() */
585 static u8 __init
acpi_table_checksum(u8
*buffer
, u32 length
)
588 u8
*end
= buffer
+ length
;
591 sum
= (u8
) (sum
+ *(buffer
++));
595 /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */
596 static const char * const table_sigs
[] = {
597 ACPI_SIG_BERT
, ACPI_SIG_CPEP
, ACPI_SIG_ECDT
, ACPI_SIG_EINJ
,
598 ACPI_SIG_ERST
, ACPI_SIG_HEST
, ACPI_SIG_MADT
, ACPI_SIG_MSCT
,
599 ACPI_SIG_SBST
, ACPI_SIG_SLIT
, ACPI_SIG_SRAT
, ACPI_SIG_ASF
,
600 ACPI_SIG_BOOT
, ACPI_SIG_DBGP
, ACPI_SIG_DMAR
, ACPI_SIG_HPET
,
601 ACPI_SIG_IBFT
, ACPI_SIG_IVRS
, ACPI_SIG_MCFG
, ACPI_SIG_MCHI
,
602 ACPI_SIG_SLIC
, ACPI_SIG_SPCR
, ACPI_SIG_SPMI
, ACPI_SIG_TCPA
,
603 ACPI_SIG_UEFI
, ACPI_SIG_WAET
, ACPI_SIG_WDAT
, ACPI_SIG_WDDT
,
604 ACPI_SIG_WDRT
, ACPI_SIG_DSDT
, ACPI_SIG_FADT
, ACPI_SIG_PSDT
,
605 ACPI_SIG_RSDT
, ACPI_SIG_XSDT
, ACPI_SIG_SSDT
, NULL
};
607 #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
609 #define ACPI_OVERRIDE_TABLES 64
610 static struct cpio_data __initdata acpi_initrd_files
[ACPI_OVERRIDE_TABLES
];
612 #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT)
614 void __init
acpi_initrd_override(void *data
, size_t size
)
616 int sig
, no
, table_nr
= 0, total_offset
= 0;
618 struct acpi_table_header
*table
;
619 char cpio_path
[32] = "kernel/firmware/acpi/";
620 struct cpio_data file
;
622 if (data
== NULL
|| size
== 0)
625 for (no
= 0; no
< ACPI_OVERRIDE_TABLES
; no
++) {
626 file
= find_cpio_data(cpio_path
, data
, size
, &offset
);
633 if (file
.size
< sizeof(struct acpi_table_header
)) {
634 pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n",
635 cpio_path
, file
.name
);
641 for (sig
= 0; table_sigs
[sig
]; sig
++)
642 if (!memcmp(table
->signature
, table_sigs
[sig
], 4))
645 if (!table_sigs
[sig
]) {
646 pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n",
647 cpio_path
, file
.name
);
650 if (file
.size
!= table
->length
) {
651 pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n",
652 cpio_path
, file
.name
);
655 if (acpi_table_checksum(file
.data
, table
->length
)) {
656 pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n",
657 cpio_path
, file
.name
);
661 pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n",
662 table
->signature
, cpio_path
, file
.name
, table
->length
);
664 all_tables_size
+= table
->length
;
665 acpi_initrd_files
[table_nr
].data
= file
.data
;
666 acpi_initrd_files
[table_nr
].size
= file
.size
;
673 memblock_find_in_range(0, max_low_pfn_mapped
<< PAGE_SHIFT
,
674 all_tables_size
, PAGE_SIZE
);
675 if (!acpi_tables_addr
) {
680 * Only calling e820_add_reserve does not work and the
681 * tables are invalid (memory got used) later.
682 * memblock_reserve works as expected and the tables won't get modified.
683 * But it's not enough on X86 because ioremap will
684 * complain later (used by acpi_os_map_memory) that the pages
685 * that should get mapped are not marked "reserved".
686 * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area)
689 memblock_reserve(acpi_tables_addr
, all_tables_size
);
690 arch_reserve_mem_area(acpi_tables_addr
, all_tables_size
);
693 * early_ioremap only can remap 256k one time. If we map all
694 * tables one time, we will hit the limit. Need to map chunks
695 * one by one during copying the same as that in relocate_initrd().
697 for (no
= 0; no
< table_nr
; no
++) {
698 unsigned char *src_p
= acpi_initrd_files
[no
].data
;
699 phys_addr_t size
= acpi_initrd_files
[no
].size
;
700 phys_addr_t dest_addr
= acpi_tables_addr
+ total_offset
;
701 phys_addr_t slop
, clen
;
704 total_offset
+= size
;
707 slop
= dest_addr
& ~PAGE_MASK
;
709 if (clen
> MAP_CHUNK_SIZE
- slop
)
710 clen
= MAP_CHUNK_SIZE
- slop
;
711 dest_p
= early_ioremap(dest_addr
& PAGE_MASK
,
713 memcpy(dest_p
+ slop
, src_p
, clen
);
714 early_iounmap(dest_p
, clen
+ slop
);
721 #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */
723 static void acpi_table_taint(struct acpi_table_header
*table
)
726 "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n",
727 table
->signature
, table
->oem_table_id
);
728 add_taint(TAINT_OVERRIDDEN_ACPI_TABLE
, LOCKDEP_NOW_UNRELIABLE
);
733 acpi_os_table_override(struct acpi_table_header
* existing_table
,
734 struct acpi_table_header
** new_table
)
736 if (!existing_table
|| !new_table
)
737 return AE_BAD_PARAMETER
;
741 #ifdef CONFIG_ACPI_CUSTOM_DSDT
742 if (strncmp(existing_table
->signature
, "DSDT", 4) == 0)
743 *new_table
= (struct acpi_table_header
*)AmlCode
;
745 if (*new_table
!= NULL
)
746 acpi_table_taint(existing_table
);
751 acpi_os_physical_table_override(struct acpi_table_header
*existing_table
,
752 acpi_physical_address
*address
,
755 #ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
760 int table_offset
= 0;
761 struct acpi_table_header
*table
;
766 if (!acpi_tables_addr
)
770 if (table_offset
+ ACPI_HEADER_SIZE
> all_tables_size
) {
775 table
= acpi_os_map_memory(acpi_tables_addr
+ table_offset
,
778 if (table_offset
+ table
->length
> all_tables_size
) {
779 acpi_os_unmap_memory(table
, ACPI_HEADER_SIZE
);
784 table_offset
+= table
->length
;
786 if (memcmp(existing_table
->signature
, table
->signature
, 4)) {
787 acpi_os_unmap_memory(table
,
792 /* Only override tables with matching oem id */
793 if (memcmp(table
->oem_table_id
, existing_table
->oem_table_id
,
794 ACPI_OEM_TABLE_ID_SIZE
)) {
795 acpi_os_unmap_memory(table
,
800 table_offset
-= table
->length
;
801 *table_length
= table
->length
;
802 acpi_os_unmap_memory(table
, ACPI_HEADER_SIZE
);
803 *address
= acpi_tables_addr
+ table_offset
;
805 } while (table_offset
+ ACPI_HEADER_SIZE
< all_tables_size
);
808 acpi_table_taint(existing_table
);
813 static irqreturn_t
acpi_irq(int irq
, void *dev_id
)
817 handled
= (*acpi_irq_handler
) (acpi_irq_context
);
823 acpi_irq_not_handled
++;
829 acpi_os_install_interrupt_handler(u32 gsi
, acpi_osd_handler handler
,
834 acpi_irq_stats_init();
837 * ACPI interrupts different from the SCI in our copy of the FADT are
840 if (gsi
!= acpi_gbl_FADT
.sci_interrupt
)
841 return AE_BAD_PARAMETER
;
843 if (acpi_irq_handler
)
844 return AE_ALREADY_ACQUIRED
;
846 if (acpi_gsi_to_irq(gsi
, &irq
) < 0) {
847 printk(KERN_ERR PREFIX
"SCI (ACPI GSI %d) not registered\n",
852 acpi_irq_handler
= handler
;
853 acpi_irq_context
= context
;
854 if (request_irq(irq
, acpi_irq
, IRQF_SHARED
, "acpi", acpi_irq
)) {
855 printk(KERN_ERR PREFIX
"SCI (IRQ%d) allocation failed\n", irq
);
856 acpi_irq_handler
= NULL
;
857 return AE_NOT_ACQUIRED
;
863 acpi_status
acpi_os_remove_interrupt_handler(u32 irq
, acpi_osd_handler handler
)
865 if (irq
!= acpi_gbl_FADT
.sci_interrupt
)
866 return AE_BAD_PARAMETER
;
868 free_irq(irq
, acpi_irq
);
869 acpi_irq_handler
= NULL
;
875 * Running in interpreter thread context, safe to sleep
878 void acpi_os_sleep(u64 ms
)
883 void acpi_os_stall(u32 us
)
891 touch_nmi_watchdog();
897 * Support ACPI 3.0 AML Timer operand
898 * Returns 64-bit free-running, monotonically increasing timer
899 * with 100ns granularity
901 u64
acpi_os_get_timer(void)
903 u64 time_ns
= ktime_to_ns(ktime_get());
904 do_div(time_ns
, 100);
908 acpi_status
acpi_os_read_port(acpi_io_address port
, u32
* value
, u32 width
)
917 *(u8
*) value
= inb(port
);
918 } else if (width
<= 16) {
919 *(u16
*) value
= inw(port
);
920 } else if (width
<= 32) {
921 *(u32
*) value
= inl(port
);
929 EXPORT_SYMBOL(acpi_os_read_port
);
931 acpi_status
acpi_os_write_port(acpi_io_address port
, u32 value
, u32 width
)
935 } else if (width
<= 16) {
937 } else if (width
<= 32) {
946 EXPORT_SYMBOL(acpi_os_write_port
);
949 acpi_os_read_memory(acpi_physical_address phys_addr
, u64
*value
, u32 width
)
951 void __iomem
*virt_addr
;
952 unsigned int size
= width
/ 8;
957 virt_addr
= acpi_map_vaddr_lookup(phys_addr
, size
);
960 virt_addr
= acpi_os_ioremap(phys_addr
, size
);
962 return AE_BAD_ADDRESS
;
971 *(u8
*) value
= readb(virt_addr
);
974 *(u16
*) value
= readw(virt_addr
);
977 *(u32
*) value
= readl(virt_addr
);
980 *(u64
*) value
= readq(virt_addr
);
995 acpi_os_write_memory(acpi_physical_address phys_addr
, u64 value
, u32 width
)
997 void __iomem
*virt_addr
;
998 unsigned int size
= width
/ 8;
1002 virt_addr
= acpi_map_vaddr_lookup(phys_addr
, size
);
1005 virt_addr
= acpi_os_ioremap(phys_addr
, size
);
1007 return AE_BAD_ADDRESS
;
1013 writeb(value
, virt_addr
);
1016 writew(value
, virt_addr
);
1019 writel(value
, virt_addr
);
1022 writeq(value
, virt_addr
);
1037 acpi_os_read_pci_configuration(struct acpi_pci_id
* pci_id
, u32 reg
,
1038 u64
*value
, u32 width
)
1044 return AE_BAD_PARAMETER
;
1060 result
= raw_pci_read(pci_id
->segment
, pci_id
->bus
,
1061 PCI_DEVFN(pci_id
->device
, pci_id
->function
),
1062 reg
, size
, &value32
);
1065 return (result
? AE_ERROR
: AE_OK
);
1069 acpi_os_write_pci_configuration(struct acpi_pci_id
* pci_id
, u32 reg
,
1070 u64 value
, u32 width
)
1088 result
= raw_pci_write(pci_id
->segment
, pci_id
->bus
,
1089 PCI_DEVFN(pci_id
->device
, pci_id
->function
),
1092 return (result
? AE_ERROR
: AE_OK
);
1095 static void acpi_os_execute_deferred(struct work_struct
*work
)
1097 struct acpi_os_dpc
*dpc
= container_of(work
, struct acpi_os_dpc
, work
);
1099 dpc
->function(dpc
->context
);
1103 /*******************************************************************************
1105 * FUNCTION: acpi_os_execute
1107 * PARAMETERS: Type - Type of the callback
1108 * Function - Function to be executed
1109 * Context - Function parameters
1113 * DESCRIPTION: Depending on type, either queues function for deferred execution or
1114 * immediately executes function on a separate thread.
1116 ******************************************************************************/
1118 acpi_status
acpi_os_execute(acpi_execute_type type
,
1119 acpi_osd_exec_callback function
, void *context
)
1121 acpi_status status
= AE_OK
;
1122 struct acpi_os_dpc
*dpc
;
1123 struct workqueue_struct
*queue
;
1125 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
,
1126 "Scheduling function [%p(%p)] for deferred execution.\n",
1127 function
, context
));
1130 * Allocate/initialize DPC structure. Note that this memory will be
1131 * freed by the callee. The kernel handles the work_struct list in a
1132 * way that allows us to also free its memory inside the callee.
1133 * Because we may want to schedule several tasks with different
1134 * parameters we can't use the approach some kernel code uses of
1135 * having a static work_struct.
1138 dpc
= kzalloc(sizeof(struct acpi_os_dpc
), GFP_ATOMIC
);
1140 return AE_NO_MEMORY
;
1142 dpc
->function
= function
;
1143 dpc
->context
= context
;
1146 * To prevent lockdep from complaining unnecessarily, make sure that
1147 * there is a different static lockdep key for each workqueue by using
1148 * INIT_WORK() for each of them separately.
1150 if (type
== OSL_NOTIFY_HANDLER
) {
1151 queue
= kacpi_notify_wq
;
1152 INIT_WORK(&dpc
->work
, acpi_os_execute_deferred
);
1155 INIT_WORK(&dpc
->work
, acpi_os_execute_deferred
);
1159 * On some machines, a software-initiated SMI causes corruption unless
1160 * the SMI runs on CPU 0. An SMI can be initiated by any AML, but
1161 * typically it's done in GPE-related methods that are run via
1162 * workqueues, so we can avoid the known corruption cases by always
1163 * queueing on CPU 0.
1165 ret
= queue_work_on(0, queue
, &dpc
->work
);
1168 printk(KERN_ERR PREFIX
1169 "Call to queue_work() failed.\n");
1175 EXPORT_SYMBOL(acpi_os_execute
);
1177 void acpi_os_wait_events_complete(void)
1180 * Make sure the GPE handler or the fixed event handler is not used
1181 * on another CPU after removal.
1183 if (acpi_irq_handler
)
1184 synchronize_hardirq(acpi_gbl_FADT
.sci_interrupt
);
1185 flush_workqueue(kacpid_wq
);
1186 flush_workqueue(kacpi_notify_wq
);
1189 struct acpi_hp_work
{
1190 struct work_struct work
;
1191 struct acpi_device
*adev
;
1195 static void acpi_hotplug_work_fn(struct work_struct
*work
)
1197 struct acpi_hp_work
*hpw
= container_of(work
, struct acpi_hp_work
, work
);
1199 acpi_os_wait_events_complete();
1200 acpi_device_hotplug(hpw
->adev
, hpw
->src
);
1204 acpi_status
acpi_hotplug_schedule(struct acpi_device
*adev
, u32 src
)
1206 struct acpi_hp_work
*hpw
;
1208 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
,
1209 "Scheduling hotplug event (%p, %u) for deferred execution.\n",
1212 hpw
= kmalloc(sizeof(*hpw
), GFP_KERNEL
);
1214 return AE_NO_MEMORY
;
1216 INIT_WORK(&hpw
->work
, acpi_hotplug_work_fn
);
1220 * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because
1221 * the hotplug code may call driver .remove() functions, which may
1222 * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush
1225 if (!queue_work(kacpi_hotplug_wq
, &hpw
->work
)) {
1232 bool acpi_queue_hotplug_work(struct work_struct
*work
)
1234 return queue_work(kacpi_hotplug_wq
, work
);
1238 acpi_os_create_semaphore(u32 max_units
, u32 initial_units
, acpi_handle
* handle
)
1240 struct semaphore
*sem
= NULL
;
1242 sem
= acpi_os_allocate_zeroed(sizeof(struct semaphore
));
1244 return AE_NO_MEMORY
;
1246 sema_init(sem
, initial_units
);
1248 *handle
= (acpi_handle
*) sem
;
1250 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Creating semaphore[%p|%d].\n",
1251 *handle
, initial_units
));
1257 * TODO: A better way to delete semaphores? Linux doesn't have a
1258 * 'delete_semaphore()' function -- may result in an invalid
1259 * pointer dereference for non-synchronized consumers. Should
1260 * we at least check for blocked threads and signal/cancel them?
1263 acpi_status
acpi_os_delete_semaphore(acpi_handle handle
)
1265 struct semaphore
*sem
= (struct semaphore
*)handle
;
1268 return AE_BAD_PARAMETER
;
1270 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Deleting semaphore[%p].\n", handle
));
1272 BUG_ON(!list_empty(&sem
->wait_list
));
1280 * TODO: Support for units > 1?
1282 acpi_status
acpi_os_wait_semaphore(acpi_handle handle
, u32 units
, u16 timeout
)
1284 acpi_status status
= AE_OK
;
1285 struct semaphore
*sem
= (struct semaphore
*)handle
;
1289 if (!acpi_os_initialized
)
1292 if (!sem
|| (units
< 1))
1293 return AE_BAD_PARAMETER
;
1298 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Waiting for semaphore[%p|%d|%d]\n",
1299 handle
, units
, timeout
));
1301 if (timeout
== ACPI_WAIT_FOREVER
)
1302 jiffies
= MAX_SCHEDULE_TIMEOUT
;
1304 jiffies
= msecs_to_jiffies(timeout
);
1306 ret
= down_timeout(sem
, jiffies
);
1310 if (ACPI_FAILURE(status
)) {
1311 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
,
1312 "Failed to acquire semaphore[%p|%d|%d], %s",
1313 handle
, units
, timeout
,
1314 acpi_format_exception(status
)));
1316 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
,
1317 "Acquired semaphore[%p|%d|%d]", handle
,
1325 * TODO: Support for units > 1?
1327 acpi_status
acpi_os_signal_semaphore(acpi_handle handle
, u32 units
)
1329 struct semaphore
*sem
= (struct semaphore
*)handle
;
1331 if (!acpi_os_initialized
)
1334 if (!sem
|| (units
< 1))
1335 return AE_BAD_PARAMETER
;
1340 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Signaling semaphore[%p|%d]\n", handle
,
1348 #ifdef ACPI_FUTURE_USAGE
1349 u32
acpi_os_get_line(char *buffer
)
1352 #ifdef ENABLE_DEBUGGER
1353 if (acpi_in_debugger
) {
1356 kdb_read(buffer
, sizeof(line_buf
));
1358 /* remove the CR kdb includes */
1359 chars
= strlen(buffer
) - 1;
1360 buffer
[chars
] = '\0';
1366 #endif /* ACPI_FUTURE_USAGE */
1368 acpi_status
acpi_os_signal(u32 function
, void *info
)
1371 case ACPI_SIGNAL_FATAL
:
1372 printk(KERN_ERR PREFIX
"Fatal opcode executed\n");
1374 case ACPI_SIGNAL_BREAKPOINT
:
1377 * ACPI spec. says to treat it as a NOP unless
1378 * you are debugging. So if/when we integrate
1379 * AML debugger into the kernel debugger its
1380 * hook will go here. But until then it is
1381 * not useful to print anything on breakpoints.
1391 static int __init
acpi_os_name_setup(char *str
)
1393 char *p
= acpi_os_name
;
1394 int count
= ACPI_MAX_OVERRIDE_LEN
- 1;
1399 for (; count
-- && *str
; str
++) {
1400 if (isalnum(*str
) || *str
== ' ' || *str
== ':')
1402 else if (*str
== '\'' || *str
== '"')
1413 __setup("acpi_os_name=", acpi_os_name_setup
);
1415 #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
1416 #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */
1418 struct osi_setup_entry
{
1419 char string
[OSI_STRING_LENGTH_MAX
];
1423 static struct osi_setup_entry
1424 osi_setup_entries
[OSI_STRING_ENTRIES_MAX
] __initdata
= {
1425 {"Module Device", true},
1426 {"Processor Device", true},
1427 {"3.0 _SCP Extensions", true},
1428 {"Processor Aggregator Device", true},
1431 void __init
acpi_osi_setup(char *str
)
1433 struct osi_setup_entry
*osi
;
1437 if (!acpi_gbl_create_osi_method
)
1440 if (str
== NULL
|| *str
== '\0') {
1441 printk(KERN_INFO PREFIX
"_OSI method disabled\n");
1442 acpi_gbl_create_osi_method
= FALSE
;
1449 osi_linux
.default_disabling
= 1;
1451 } else if (*str
== '*') {
1452 acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS
);
1453 for (i
= 0; i
< OSI_STRING_ENTRIES_MAX
; i
++) {
1454 osi
= &osi_setup_entries
[i
];
1455 osi
->enable
= false;
1462 for (i
= 0; i
< OSI_STRING_ENTRIES_MAX
; i
++) {
1463 osi
= &osi_setup_entries
[i
];
1464 if (!strcmp(osi
->string
, str
)) {
1465 osi
->enable
= enable
;
1467 } else if (osi
->string
[0] == '\0') {
1468 osi
->enable
= enable
;
1469 strncpy(osi
->string
, str
, OSI_STRING_LENGTH_MAX
);
1475 static void __init
set_osi_linux(unsigned int enable
)
1477 if (osi_linux
.enable
!= enable
)
1478 osi_linux
.enable
= enable
;
1480 if (osi_linux
.enable
)
1481 acpi_osi_setup("Linux");
1483 acpi_osi_setup("!Linux");
1488 static void __init
acpi_cmdline_osi_linux(unsigned int enable
)
1490 osi_linux
.cmdline
= 1; /* cmdline set the default and override DMI */
1492 set_osi_linux(enable
);
1497 void __init
acpi_dmi_osi_linux(int enable
, const struct dmi_system_id
*d
)
1499 printk(KERN_NOTICE PREFIX
"DMI detected: %s\n", d
->ident
);
1504 osi_linux
.dmi
= 1; /* DMI knows that this box asks OSI(Linux) */
1505 set_osi_linux(enable
);
1511 * Modify the list of "OS Interfaces" reported to BIOS via _OSI
1513 * empty string disables _OSI
1514 * string starting with '!' disables that string
1515 * otherwise string is added to list, augmenting built-in strings
1517 static void __init
acpi_osi_setup_late(void)
1519 struct osi_setup_entry
*osi
;
1524 if (osi_linux
.default_disabling
) {
1525 status
= acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS
);
1527 if (ACPI_SUCCESS(status
))
1528 printk(KERN_INFO PREFIX
"Disabled all _OSI OS vendors\n");
1531 for (i
= 0; i
< OSI_STRING_ENTRIES_MAX
; i
++) {
1532 osi
= &osi_setup_entries
[i
];
1538 status
= acpi_install_interface(str
);
1540 if (ACPI_SUCCESS(status
))
1541 printk(KERN_INFO PREFIX
"Added _OSI(%s)\n", str
);
1543 status
= acpi_remove_interface(str
);
1545 if (ACPI_SUCCESS(status
))
1546 printk(KERN_INFO PREFIX
"Deleted _OSI(%s)\n", str
);
1551 static int __init
osi_setup(char *str
)
1553 if (str
&& !strcmp("Linux", str
))
1554 acpi_cmdline_osi_linux(1);
1555 else if (str
&& !strcmp("!Linux", str
))
1556 acpi_cmdline_osi_linux(0);
1558 acpi_osi_setup(str
);
1563 __setup("acpi_osi=", osi_setup
);
1566 * Disable the auto-serialization of named objects creation methods.
1568 * This feature is enabled by default. It marks the AML control methods
1569 * that contain the opcodes to create named objects as "Serialized".
1571 static int __init
acpi_no_auto_serialize_setup(char *str
)
1573 acpi_gbl_auto_serialize_methods
= FALSE
;
1574 pr_info("ACPI: auto-serialization disabled\n");
1579 __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup
);
1581 /* Check of resource interference between native drivers and ACPI
1582 * OperationRegions (SystemIO and System Memory only).
1583 * IO ports and memory declared in ACPI might be used by the ACPI subsystem
1584 * in arbitrary AML code and can interfere with legacy drivers.
1585 * acpi_enforce_resources= can be set to:
1587 * - strict (default) (2)
1588 * -> further driver trying to access the resources will not load
1590 * -> further driver trying to access the resources will load, but you
1591 * get a system message that something might go wrong...
1594 * -> ACPI Operation Region resources will not be registered
1597 #define ENFORCE_RESOURCES_STRICT 2
1598 #define ENFORCE_RESOURCES_LAX 1
1599 #define ENFORCE_RESOURCES_NO 0
1601 static unsigned int acpi_enforce_resources
= ENFORCE_RESOURCES_STRICT
;
1603 static int __init
acpi_enforce_resources_setup(char *str
)
1605 if (str
== NULL
|| *str
== '\0')
1608 if (!strcmp("strict", str
))
1609 acpi_enforce_resources
= ENFORCE_RESOURCES_STRICT
;
1610 else if (!strcmp("lax", str
))
1611 acpi_enforce_resources
= ENFORCE_RESOURCES_LAX
;
1612 else if (!strcmp("no", str
))
1613 acpi_enforce_resources
= ENFORCE_RESOURCES_NO
;
1618 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup
);
1620 /* Check for resource conflicts between ACPI OperationRegions and native
1622 int acpi_check_resource_conflict(const struct resource
*res
)
1624 acpi_adr_space_type space_id
;
1629 if (acpi_enforce_resources
== ENFORCE_RESOURCES_NO
)
1631 if (!(res
->flags
& IORESOURCE_IO
) && !(res
->flags
& IORESOURCE_MEM
))
1634 if (res
->flags
& IORESOURCE_IO
)
1635 space_id
= ACPI_ADR_SPACE_SYSTEM_IO
;
1637 space_id
= ACPI_ADR_SPACE_SYSTEM_MEMORY
;
1639 length
= resource_size(res
);
1640 if (acpi_enforce_resources
!= ENFORCE_RESOURCES_NO
)
1642 clash
= acpi_check_address_range(space_id
, res
->start
, length
, warn
);
1645 if (acpi_enforce_resources
!= ENFORCE_RESOURCES_NO
) {
1646 if (acpi_enforce_resources
== ENFORCE_RESOURCES_LAX
)
1647 printk(KERN_NOTICE
"ACPI: This conflict may"
1648 " cause random problems and system"
1650 printk(KERN_INFO
"ACPI: If an ACPI driver is available"
1651 " for this device, you should use it instead of"
1652 " the native driver\n");
1654 if (acpi_enforce_resources
== ENFORCE_RESOURCES_STRICT
)
1659 EXPORT_SYMBOL(acpi_check_resource_conflict
);
1661 int acpi_check_region(resource_size_t start
, resource_size_t n
,
1664 struct resource res
= {
1666 .end
= start
+ n
- 1,
1668 .flags
= IORESOURCE_IO
,
1671 return acpi_check_resource_conflict(&res
);
1673 EXPORT_SYMBOL(acpi_check_region
);
1676 * Let drivers know whether the resource checks are effective
1678 int acpi_resources_are_enforced(void)
1680 return acpi_enforce_resources
== ENFORCE_RESOURCES_STRICT
;
1682 EXPORT_SYMBOL(acpi_resources_are_enforced
);
1684 bool acpi_osi_is_win8(void)
1686 return acpi_gbl_osi_data
>= ACPI_OSI_WIN_8
;
1688 EXPORT_SYMBOL(acpi_osi_is_win8
);
1691 * Deallocate the memory for a spinlock.
1693 void acpi_os_delete_lock(acpi_spinlock handle
)
1699 * Acquire a spinlock.
1701 * handle is a pointer to the spinlock_t.
1704 acpi_cpu_flags
acpi_os_acquire_lock(acpi_spinlock lockp
)
1706 acpi_cpu_flags flags
;
1707 spin_lock_irqsave(lockp
, flags
);
1712 * Release a spinlock. See above.
1715 void acpi_os_release_lock(acpi_spinlock lockp
, acpi_cpu_flags flags
)
1717 spin_unlock_irqrestore(lockp
, flags
);
1720 #ifndef ACPI_USE_LOCAL_CACHE
1722 /*******************************************************************************
1724 * FUNCTION: acpi_os_create_cache
1726 * PARAMETERS: name - Ascii name for the cache
1727 * size - Size of each cached object
1728 * depth - Maximum depth of the cache (in objects) <ignored>
1729 * cache - Where the new cache object is returned
1733 * DESCRIPTION: Create a cache object
1735 ******************************************************************************/
1738 acpi_os_create_cache(char *name
, u16 size
, u16 depth
, acpi_cache_t
** cache
)
1740 *cache
= kmem_cache_create(name
, size
, 0, 0, NULL
);
1747 /*******************************************************************************
1749 * FUNCTION: acpi_os_purge_cache
1751 * PARAMETERS: Cache - Handle to cache object
1755 * DESCRIPTION: Free all objects within the requested cache.
1757 ******************************************************************************/
1759 acpi_status
acpi_os_purge_cache(acpi_cache_t
* cache
)
1761 kmem_cache_shrink(cache
);
1765 /*******************************************************************************
1767 * FUNCTION: acpi_os_delete_cache
1769 * PARAMETERS: Cache - Handle to cache object
1773 * DESCRIPTION: Free all objects within the requested cache and delete the
1776 ******************************************************************************/
1778 acpi_status
acpi_os_delete_cache(acpi_cache_t
* cache
)
1780 kmem_cache_destroy(cache
);
1784 /*******************************************************************************
1786 * FUNCTION: acpi_os_release_object
1788 * PARAMETERS: Cache - Handle to cache object
1789 * Object - The object to be released
1793 * DESCRIPTION: Release an object to the specified cache. If cache is full,
1794 * the object is deleted.
1796 ******************************************************************************/
1798 acpi_status
acpi_os_release_object(acpi_cache_t
* cache
, void *object
)
1800 kmem_cache_free(cache
, object
);
1805 static int __init
acpi_no_static_ssdt_setup(char *s
)
1807 acpi_gbl_disable_ssdt_table_install
= TRUE
;
1808 pr_info("ACPI: static SSDT installation disabled\n");
1813 early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup
);
1815 static int __init
acpi_disable_return_repair(char *s
)
1817 printk(KERN_NOTICE PREFIX
1818 "ACPI: Predefined validation mechanism disabled\n");
1819 acpi_gbl_disable_auto_repair
= TRUE
;
1824 __setup("acpica_no_return_repair", acpi_disable_return_repair
);
1826 acpi_status __init
acpi_os_initialize(void)
1828 acpi_os_map_generic_address(&acpi_gbl_FADT
.xpm1a_event_block
);
1829 acpi_os_map_generic_address(&acpi_gbl_FADT
.xpm1b_event_block
);
1830 acpi_os_map_generic_address(&acpi_gbl_FADT
.xgpe0_block
);
1831 acpi_os_map_generic_address(&acpi_gbl_FADT
.xgpe1_block
);
1832 if (acpi_gbl_FADT
.flags
& ACPI_FADT_RESET_REGISTER
) {
1834 * Use acpi_os_map_generic_address to pre-map the reset
1835 * register if it's in system memory.
1839 rv
= acpi_os_map_generic_address(&acpi_gbl_FADT
.reset_register
);
1840 pr_debug(PREFIX
"%s: map reset_reg status %d\n", __func__
, rv
);
1842 acpi_os_initialized
= true;
1847 acpi_status __init
acpi_os_initialize1(void)
1849 kacpid_wq
= alloc_workqueue("kacpid", 0, 1);
1850 kacpi_notify_wq
= alloc_workqueue("kacpi_notify", 0, 1);
1851 kacpi_hotplug_wq
= alloc_ordered_workqueue("kacpi_hotplug", 0);
1853 BUG_ON(!kacpi_notify_wq
);
1854 BUG_ON(!kacpi_hotplug_wq
);
1855 acpi_install_interface_handler(acpi_osi_handler
);
1856 acpi_osi_setup_late();
1860 acpi_status
acpi_os_terminate(void)
1862 if (acpi_irq_handler
) {
1863 acpi_os_remove_interrupt_handler(acpi_gbl_FADT
.sci_interrupt
,
1867 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.xgpe1_block
);
1868 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.xgpe0_block
);
1869 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.xpm1b_event_block
);
1870 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.xpm1a_event_block
);
1871 if (acpi_gbl_FADT
.flags
& ACPI_FADT_RESET_REGISTER
)
1872 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.reset_register
);
1874 destroy_workqueue(kacpid_wq
);
1875 destroy_workqueue(kacpi_notify_wq
);
1876 destroy_workqueue(kacpi_hotplug_wq
);
1881 acpi_status
acpi_os_prepare_sleep(u8 sleep_state
, u32 pm1a_control
,
1885 if (__acpi_os_prepare_sleep
)
1886 rc
= __acpi_os_prepare_sleep(sleep_state
,
1887 pm1a_control
, pm1b_control
);
1891 return AE_CTRL_SKIP
;
1896 void acpi_os_set_prepare_sleep(int (*func
)(u8 sleep_state
,
1897 u32 pm1a_ctrl
, u32 pm1b_ctrl
))
1899 __acpi_os_prepare_sleep
= func
;
1902 acpi_status
acpi_os_prepare_extended_sleep(u8 sleep_state
, u32 val_a
,
1906 if (__acpi_os_prepare_extended_sleep
)
1907 rc
= __acpi_os_prepare_extended_sleep(sleep_state
,
1912 return AE_CTRL_SKIP
;
1917 void acpi_os_set_prepare_extended_sleep(int (*func
)(u8 sleep_state
,
1918 u32 val_a
, u32 val_b
))
1920 __acpi_os_prepare_extended_sleep
= func
;