2 * acpi_osl.c - OS-dependent functions ($Revision: 83 $)
4 * Copyright (C) 2000 Andrew Henroid
5 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
6 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
7 * Copyright (c) 2008 Intel Corporation
8 * Author: Matthew Wilcox <willy@linux.intel.com>
10 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 #include <linux/module.h>
27 #include <linux/kernel.h>
28 #include <linux/slab.h>
30 #include <linux/highmem.h>
31 #include <linux/pci.h>
32 #include <linux/interrupt.h>
33 #include <linux/kmod.h>
34 #include <linux/delay.h>
35 #include <linux/workqueue.h>
36 #include <linux/nmi.h>
37 #include <linux/acpi.h>
38 #include <linux/efi.h>
39 #include <linux/ioport.h>
40 #include <linux/list.h>
41 #include <linux/jiffies.h>
42 #include <linux/semaphore.h>
45 #include <asm/uaccess.h>
46 #include <linux/io-64-nonatomic-lo-hi.h>
50 #define _COMPONENT ACPI_OS_SERVICES
51 ACPI_MODULE_NAME("osl");
54 acpi_osd_exec_callback function
;
56 struct work_struct work
;
59 #ifdef CONFIG_ACPI_CUSTOM_DSDT
60 #include CONFIG_ACPI_CUSTOM_DSDT_FILE
63 #ifdef ENABLE_DEBUGGER
64 #include <linux/kdb.h>
66 /* stuff for debugger support */
68 EXPORT_SYMBOL(acpi_in_debugger
);
69 #endif /*ENABLE_DEBUGGER */
71 static int (*__acpi_os_prepare_sleep
)(u8 sleep_state
, u32 pm1a_ctrl
,
73 static int (*__acpi_os_prepare_extended_sleep
)(u8 sleep_state
, u32 val_a
,
76 static acpi_osd_handler acpi_irq_handler
;
77 static void *acpi_irq_context
;
78 static struct workqueue_struct
*kacpid_wq
;
79 static struct workqueue_struct
*kacpi_notify_wq
;
80 static struct workqueue_struct
*kacpi_hotplug_wq
;
81 static bool acpi_os_initialized
;
82 unsigned int acpi_sci_irq
= INVALID_ACPI_IRQ
;
85 * This list of permanent mappings is for memory that may be accessed from
86 * interrupt context, where we can't do the ioremap().
89 struct list_head list
;
91 acpi_physical_address phys
;
93 unsigned long refcount
;
96 static LIST_HEAD(acpi_ioremaps
);
97 static DEFINE_MUTEX(acpi_ioremap_lock
);
99 static void __init
acpi_osi_setup_late(void);
102 * The story of _OSI(Linux)
104 * From pre-history through Linux-2.6.22,
105 * Linux responded TRUE upon a BIOS OSI(Linux) query.
107 * Unfortunately, reference BIOS writers got wind of this
108 * and put OSI(Linux) in their example code, quickly exposing
109 * this string as ill-conceived and opening the door to
110 * an un-bounded number of BIOS incompatibilities.
112 * For example, OSI(Linux) was used on resume to re-POST a
113 * video card on one system, because Linux at that time
114 * could not do a speedy restore in its native driver.
115 * But then upon gaining quick native restore capability,
116 * Linux has no way to tell the BIOS to skip the time-consuming
117 * POST -- putting Linux at a permanent performance disadvantage.
118 * On another system, the BIOS writer used OSI(Linux)
119 * to infer native OS support for IPMI! On other systems,
120 * OSI(Linux) simply got in the way of Linux claiming to
121 * be compatible with other operating systems, exposing
122 * BIOS issues such as skipped device initialization.
124 * So "Linux" turned out to be a really poor chose of
125 * OSI string, and from Linux-2.6.23 onward we respond FALSE.
127 * BIOS writers should NOT query _OSI(Linux) on future systems.
128 * Linux will complain on the console when it sees it, and return FALSE.
129 * To get Linux to return TRUE for your system will require
130 * a kernel source update to add a DMI entry,
131 * or boot with "acpi_osi=Linux"
134 static struct osi_linux
{
135 unsigned int enable
:1;
137 unsigned int cmdline
:1;
138 unsigned int default_disabling
:1;
139 } osi_linux
= {0, 0, 0, 0};
141 static u32
acpi_osi_handler(acpi_string interface
, u32 supported
)
143 if (!strcmp("Linux", interface
)) {
145 printk_once(KERN_NOTICE FW_BUG PREFIX
146 "BIOS _OSI(Linux) query %s%s\n",
147 osi_linux
.enable
? "honored" : "ignored",
148 osi_linux
.cmdline
? " via cmdline" :
149 osi_linux
.dmi
? " via DMI" : "");
152 if (!strcmp("Darwin", interface
)) {
154 * Apple firmware will behave poorly if it receives positive
155 * answers to "Darwin" and any other OS. Respond positively
156 * to Darwin and then disable all other vendor strings.
158 acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS
);
159 supported
= ACPI_UINT32_MAX
;
165 static void __init
acpi_request_region (struct acpi_generic_address
*gas
,
166 unsigned int length
, char *desc
)
170 /* Handle possible alignment issues */
171 memcpy(&addr
, &gas
->address
, sizeof(addr
));
172 if (!addr
|| !length
)
175 /* Resources are never freed */
176 if (gas
->space_id
== ACPI_ADR_SPACE_SYSTEM_IO
)
177 request_region(addr
, length
, desc
);
178 else if (gas
->space_id
== ACPI_ADR_SPACE_SYSTEM_MEMORY
)
179 request_mem_region(addr
, length
, desc
);
182 static int __init
acpi_reserve_resources(void)
184 acpi_request_region(&acpi_gbl_FADT
.xpm1a_event_block
, acpi_gbl_FADT
.pm1_event_length
,
185 "ACPI PM1a_EVT_BLK");
187 acpi_request_region(&acpi_gbl_FADT
.xpm1b_event_block
, acpi_gbl_FADT
.pm1_event_length
,
188 "ACPI PM1b_EVT_BLK");
190 acpi_request_region(&acpi_gbl_FADT
.xpm1a_control_block
, acpi_gbl_FADT
.pm1_control_length
,
191 "ACPI PM1a_CNT_BLK");
193 acpi_request_region(&acpi_gbl_FADT
.xpm1b_control_block
, acpi_gbl_FADT
.pm1_control_length
,
194 "ACPI PM1b_CNT_BLK");
196 if (acpi_gbl_FADT
.pm_timer_length
== 4)
197 acpi_request_region(&acpi_gbl_FADT
.xpm_timer_block
, 4, "ACPI PM_TMR");
199 acpi_request_region(&acpi_gbl_FADT
.xpm2_control_block
, acpi_gbl_FADT
.pm2_control_length
,
202 /* Length of GPE blocks must be a non-negative multiple of 2 */
204 if (!(acpi_gbl_FADT
.gpe0_block_length
& 0x1))
205 acpi_request_region(&acpi_gbl_FADT
.xgpe0_block
,
206 acpi_gbl_FADT
.gpe0_block_length
, "ACPI GPE0_BLK");
208 if (!(acpi_gbl_FADT
.gpe1_block_length
& 0x1))
209 acpi_request_region(&acpi_gbl_FADT
.xgpe1_block
,
210 acpi_gbl_FADT
.gpe1_block_length
, "ACPI GPE1_BLK");
214 fs_initcall_sync(acpi_reserve_resources
);
216 void acpi_os_printf(const char *fmt
, ...)
220 acpi_os_vprintf(fmt
, args
);
223 EXPORT_SYMBOL(acpi_os_printf
);
225 void acpi_os_vprintf(const char *fmt
, va_list args
)
227 static char buffer
[512];
229 vsprintf(buffer
, fmt
, args
);
231 #ifdef ENABLE_DEBUGGER
232 if (acpi_in_debugger
) {
233 kdb_printf("%s", buffer
);
235 printk(KERN_CONT
"%s", buffer
);
238 if (acpi_debugger_write_log(buffer
) < 0)
239 printk(KERN_CONT
"%s", buffer
);
244 static unsigned long acpi_rsdp
;
245 static int __init
setup_acpi_rsdp(char *arg
)
247 if (kstrtoul(arg
, 16, &acpi_rsdp
))
251 early_param("acpi_rsdp", setup_acpi_rsdp
);
254 acpi_physical_address __init
acpi_os_get_root_pointer(void)
261 if (efi_enabled(EFI_CONFIG_TABLES
)) {
262 if (efi
.acpi20
!= EFI_INVALID_TABLE_ADDR
)
264 else if (efi
.acpi
!= EFI_INVALID_TABLE_ADDR
)
267 printk(KERN_ERR PREFIX
268 "System description tables not found\n");
271 } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP
)) {
272 acpi_physical_address pa
= 0;
274 acpi_find_root_pointer(&pa
);
281 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
282 static struct acpi_ioremap
*
283 acpi_map_lookup(acpi_physical_address phys
, acpi_size size
)
285 struct acpi_ioremap
*map
;
287 list_for_each_entry_rcu(map
, &acpi_ioremaps
, list
)
288 if (map
->phys
<= phys
&&
289 phys
+ size
<= map
->phys
+ map
->size
)
295 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
296 static void __iomem
*
297 acpi_map_vaddr_lookup(acpi_physical_address phys
, unsigned int size
)
299 struct acpi_ioremap
*map
;
301 map
= acpi_map_lookup(phys
, size
);
303 return map
->virt
+ (phys
- map
->phys
);
308 void __iomem
*acpi_os_get_iomem(acpi_physical_address phys
, unsigned int size
)
310 struct acpi_ioremap
*map
;
311 void __iomem
*virt
= NULL
;
313 mutex_lock(&acpi_ioremap_lock
);
314 map
= acpi_map_lookup(phys
, size
);
316 virt
= map
->virt
+ (phys
- map
->phys
);
319 mutex_unlock(&acpi_ioremap_lock
);
322 EXPORT_SYMBOL_GPL(acpi_os_get_iomem
);
324 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
325 static struct acpi_ioremap
*
326 acpi_map_lookup_virt(void __iomem
*virt
, acpi_size size
)
328 struct acpi_ioremap
*map
;
330 list_for_each_entry_rcu(map
, &acpi_ioremaps
, list
)
331 if (map
->virt
<= virt
&&
332 virt
+ size
<= map
->virt
+ map
->size
)
338 #if defined(CONFIG_IA64) || defined(CONFIG_ARM64)
339 /* ioremap will take care of cache attributes */
340 #define should_use_kmap(pfn) 0
342 #define should_use_kmap(pfn) page_is_ram(pfn)
345 static void __iomem
*acpi_map(acpi_physical_address pg_off
, unsigned long pg_sz
)
349 pfn
= pg_off
>> PAGE_SHIFT
;
350 if (should_use_kmap(pfn
)) {
351 if (pg_sz
> PAGE_SIZE
)
353 return (void __iomem __force
*)kmap(pfn_to_page(pfn
));
355 return acpi_os_ioremap(pg_off
, pg_sz
);
358 static void acpi_unmap(acpi_physical_address pg_off
, void __iomem
*vaddr
)
362 pfn
= pg_off
>> PAGE_SHIFT
;
363 if (should_use_kmap(pfn
))
364 kunmap(pfn_to_page(pfn
));
370 * acpi_os_map_iomem - Get a virtual address for a given physical address range.
371 * @phys: Start of the physical address range to map.
372 * @size: Size of the physical address range to map.
374 * Look up the given physical address range in the list of existing ACPI memory
375 * mappings. If found, get a reference to it and return a pointer to it (its
376 * virtual address). If not found, map it, add it to that list and return a
379 * During early init (when acpi_gbl_permanent_mmap has not been set yet) this
380 * routine simply calls __acpi_map_table() to get the job done.
382 void __iomem
*__init_refok
383 acpi_os_map_iomem(acpi_physical_address phys
, acpi_size size
)
385 struct acpi_ioremap
*map
;
387 acpi_physical_address pg_off
;
390 if (phys
> ULONG_MAX
) {
391 printk(KERN_ERR PREFIX
"Cannot map memory that high\n");
395 if (!acpi_gbl_permanent_mmap
)
396 return __acpi_map_table((unsigned long)phys
, size
);
398 mutex_lock(&acpi_ioremap_lock
);
399 /* Check if there's a suitable mapping already. */
400 map
= acpi_map_lookup(phys
, size
);
406 map
= kzalloc(sizeof(*map
), GFP_KERNEL
);
408 mutex_unlock(&acpi_ioremap_lock
);
412 pg_off
= round_down(phys
, PAGE_SIZE
);
413 pg_sz
= round_up(phys
+ size
, PAGE_SIZE
) - pg_off
;
414 virt
= acpi_map(pg_off
, pg_sz
);
416 mutex_unlock(&acpi_ioremap_lock
);
421 INIT_LIST_HEAD(&map
->list
);
427 list_add_tail_rcu(&map
->list
, &acpi_ioremaps
);
430 mutex_unlock(&acpi_ioremap_lock
);
431 return map
->virt
+ (phys
- map
->phys
);
433 EXPORT_SYMBOL_GPL(acpi_os_map_iomem
);
436 acpi_os_map_memory(acpi_physical_address phys
, acpi_size size
)
438 return (void *)acpi_os_map_iomem(phys
, size
);
440 EXPORT_SYMBOL_GPL(acpi_os_map_memory
);
442 static void acpi_os_drop_map_ref(struct acpi_ioremap
*map
)
444 if (!--map
->refcount
)
445 list_del_rcu(&map
->list
);
448 static void acpi_os_map_cleanup(struct acpi_ioremap
*map
)
450 if (!map
->refcount
) {
451 synchronize_rcu_expedited();
452 acpi_unmap(map
->phys
, map
->virt
);
458 * acpi_os_unmap_iomem - Drop a memory mapping reference.
459 * @virt: Start of the address range to drop a reference to.
460 * @size: Size of the address range to drop a reference to.
462 * Look up the given virtual address range in the list of existing ACPI memory
463 * mappings, drop a reference to it and unmap it if there are no more active
466 * During early init (when acpi_gbl_permanent_mmap has not been set yet) this
467 * routine simply calls __acpi_unmap_table() to get the job done. Since
468 * __acpi_unmap_table() is an __init function, the __ref annotation is needed
471 void __ref
acpi_os_unmap_iomem(void __iomem
*virt
, acpi_size size
)
473 struct acpi_ioremap
*map
;
475 if (!acpi_gbl_permanent_mmap
) {
476 __acpi_unmap_table(virt
, size
);
480 mutex_lock(&acpi_ioremap_lock
);
481 map
= acpi_map_lookup_virt(virt
, size
);
483 mutex_unlock(&acpi_ioremap_lock
);
484 WARN(true, PREFIX
"%s: bad address %p\n", __func__
, virt
);
487 acpi_os_drop_map_ref(map
);
488 mutex_unlock(&acpi_ioremap_lock
);
490 acpi_os_map_cleanup(map
);
492 EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem
);
494 void __ref
acpi_os_unmap_memory(void *virt
, acpi_size size
)
496 return acpi_os_unmap_iomem((void __iomem
*)virt
, size
);
498 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory
);
500 void __init
early_acpi_os_unmap_memory(void __iomem
*virt
, acpi_size size
)
502 if (!acpi_gbl_permanent_mmap
)
503 __acpi_unmap_table(virt
, size
);
506 int acpi_os_map_generic_address(struct acpi_generic_address
*gas
)
511 if (gas
->space_id
!= ACPI_ADR_SPACE_SYSTEM_MEMORY
)
514 /* Handle possible alignment issues */
515 memcpy(&addr
, &gas
->address
, sizeof(addr
));
516 if (!addr
|| !gas
->bit_width
)
519 virt
= acpi_os_map_iomem(addr
, gas
->bit_width
/ 8);
525 EXPORT_SYMBOL(acpi_os_map_generic_address
);
527 void acpi_os_unmap_generic_address(struct acpi_generic_address
*gas
)
530 struct acpi_ioremap
*map
;
532 if (gas
->space_id
!= ACPI_ADR_SPACE_SYSTEM_MEMORY
)
535 /* Handle possible alignment issues */
536 memcpy(&addr
, &gas
->address
, sizeof(addr
));
537 if (!addr
|| !gas
->bit_width
)
540 mutex_lock(&acpi_ioremap_lock
);
541 map
= acpi_map_lookup(addr
, gas
->bit_width
/ 8);
543 mutex_unlock(&acpi_ioremap_lock
);
546 acpi_os_drop_map_ref(map
);
547 mutex_unlock(&acpi_ioremap_lock
);
549 acpi_os_map_cleanup(map
);
551 EXPORT_SYMBOL(acpi_os_unmap_generic_address
);
553 #ifdef ACPI_FUTURE_USAGE
555 acpi_os_get_physical_address(void *virt
, acpi_physical_address
* phys
)
558 return AE_BAD_PARAMETER
;
560 *phys
= virt_to_phys(virt
);
566 #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
567 static bool acpi_rev_override
;
569 int __init
acpi_rev_override_setup(char *str
)
571 acpi_rev_override
= true;
574 __setup("acpi_rev_override", acpi_rev_override_setup
);
576 #define acpi_rev_override false
579 #define ACPI_MAX_OVERRIDE_LEN 100
581 static char acpi_os_name
[ACPI_MAX_OVERRIDE_LEN
];
584 acpi_os_predefined_override(const struct acpi_predefined_names
*init_val
,
587 if (!init_val
|| !new_val
)
588 return AE_BAD_PARAMETER
;
591 if (!memcmp(init_val
->name
, "_OS_", 4) && strlen(acpi_os_name
)) {
592 printk(KERN_INFO PREFIX
"Overriding _OS definition to '%s'\n",
594 *new_val
= acpi_os_name
;
597 if (!memcmp(init_val
->name
, "_REV", 4) && acpi_rev_override
) {
598 printk(KERN_INFO PREFIX
"Overriding _REV return value to 5\n");
599 *new_val
= (char *)5;
605 #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
606 #include <linux/earlycpio.h>
607 #include <linux/memblock.h>
609 static u64 acpi_tables_addr
;
610 static int all_tables_size
;
612 /* Copied from acpica/tbutils.c:acpi_tb_checksum() */
613 static u8 __init
acpi_table_checksum(u8
*buffer
, u32 length
)
616 u8
*end
= buffer
+ length
;
619 sum
= (u8
) (sum
+ *(buffer
++));
623 /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */
624 static const char * const table_sigs
[] = {
625 ACPI_SIG_BERT
, ACPI_SIG_CPEP
, ACPI_SIG_ECDT
, ACPI_SIG_EINJ
,
626 ACPI_SIG_ERST
, ACPI_SIG_HEST
, ACPI_SIG_MADT
, ACPI_SIG_MSCT
,
627 ACPI_SIG_SBST
, ACPI_SIG_SLIT
, ACPI_SIG_SRAT
, ACPI_SIG_ASF
,
628 ACPI_SIG_BOOT
, ACPI_SIG_DBGP
, ACPI_SIG_DMAR
, ACPI_SIG_HPET
,
629 ACPI_SIG_IBFT
, ACPI_SIG_IVRS
, ACPI_SIG_MCFG
, ACPI_SIG_MCHI
,
630 ACPI_SIG_SLIC
, ACPI_SIG_SPCR
, ACPI_SIG_SPMI
, ACPI_SIG_TCPA
,
631 ACPI_SIG_UEFI
, ACPI_SIG_WAET
, ACPI_SIG_WDAT
, ACPI_SIG_WDDT
,
632 ACPI_SIG_WDRT
, ACPI_SIG_DSDT
, ACPI_SIG_FADT
, ACPI_SIG_PSDT
,
633 ACPI_SIG_RSDT
, ACPI_SIG_XSDT
, ACPI_SIG_SSDT
, NULL
};
635 #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
637 #define ACPI_OVERRIDE_TABLES 64
638 static struct cpio_data __initdata acpi_initrd_files
[ACPI_OVERRIDE_TABLES
];
640 #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT)
642 void __init
acpi_initrd_override(void *data
, size_t size
)
644 int sig
, no
, table_nr
= 0, total_offset
= 0;
646 struct acpi_table_header
*table
;
647 char cpio_path
[32] = "kernel/firmware/acpi/";
648 struct cpio_data file
;
650 if (data
== NULL
|| size
== 0)
653 for (no
= 0; no
< ACPI_OVERRIDE_TABLES
; no
++) {
654 file
= find_cpio_data(cpio_path
, data
, size
, &offset
);
661 if (file
.size
< sizeof(struct acpi_table_header
)) {
662 pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n",
663 cpio_path
, file
.name
);
669 for (sig
= 0; table_sigs
[sig
]; sig
++)
670 if (!memcmp(table
->signature
, table_sigs
[sig
], 4))
673 if (!table_sigs
[sig
]) {
674 pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n",
675 cpio_path
, file
.name
);
678 if (file
.size
!= table
->length
) {
679 pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n",
680 cpio_path
, file
.name
);
683 if (acpi_table_checksum(file
.data
, table
->length
)) {
684 pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n",
685 cpio_path
, file
.name
);
689 pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n",
690 table
->signature
, cpio_path
, file
.name
, table
->length
);
692 all_tables_size
+= table
->length
;
693 acpi_initrd_files
[table_nr
].data
= file
.data
;
694 acpi_initrd_files
[table_nr
].size
= file
.size
;
701 memblock_find_in_range(0, max_low_pfn_mapped
<< PAGE_SHIFT
,
702 all_tables_size
, PAGE_SIZE
);
703 if (!acpi_tables_addr
) {
708 * Only calling e820_add_reserve does not work and the
709 * tables are invalid (memory got used) later.
710 * memblock_reserve works as expected and the tables won't get modified.
711 * But it's not enough on X86 because ioremap will
712 * complain later (used by acpi_os_map_memory) that the pages
713 * that should get mapped are not marked "reserved".
714 * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area)
717 memblock_reserve(acpi_tables_addr
, all_tables_size
);
718 arch_reserve_mem_area(acpi_tables_addr
, all_tables_size
);
721 * early_ioremap only can remap 256k one time. If we map all
722 * tables one time, we will hit the limit. Need to map chunks
723 * one by one during copying the same as that in relocate_initrd().
725 for (no
= 0; no
< table_nr
; no
++) {
726 unsigned char *src_p
= acpi_initrd_files
[no
].data
;
727 phys_addr_t size
= acpi_initrd_files
[no
].size
;
728 phys_addr_t dest_addr
= acpi_tables_addr
+ total_offset
;
729 phys_addr_t slop
, clen
;
732 total_offset
+= size
;
735 slop
= dest_addr
& ~PAGE_MASK
;
737 if (clen
> MAP_CHUNK_SIZE
- slop
)
738 clen
= MAP_CHUNK_SIZE
- slop
;
739 dest_p
= early_ioremap(dest_addr
& PAGE_MASK
,
741 memcpy(dest_p
+ slop
, src_p
, clen
);
742 early_iounmap(dest_p
, clen
+ slop
);
749 #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */
751 static void acpi_table_taint(struct acpi_table_header
*table
)
754 "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n",
755 table
->signature
, table
->oem_table_id
);
756 add_taint(TAINT_OVERRIDDEN_ACPI_TABLE
, LOCKDEP_NOW_UNRELIABLE
);
761 acpi_os_table_override(struct acpi_table_header
* existing_table
,
762 struct acpi_table_header
** new_table
)
764 if (!existing_table
|| !new_table
)
765 return AE_BAD_PARAMETER
;
769 #ifdef CONFIG_ACPI_CUSTOM_DSDT
770 if (strncmp(existing_table
->signature
, "DSDT", 4) == 0)
771 *new_table
= (struct acpi_table_header
*)AmlCode
;
773 if (*new_table
!= NULL
)
774 acpi_table_taint(existing_table
);
779 acpi_os_physical_table_override(struct acpi_table_header
*existing_table
,
780 acpi_physical_address
*address
,
783 #ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
788 int table_offset
= 0;
789 struct acpi_table_header
*table
;
794 if (!acpi_tables_addr
)
798 if (table_offset
+ ACPI_HEADER_SIZE
> all_tables_size
) {
803 table
= acpi_os_map_memory(acpi_tables_addr
+ table_offset
,
806 if (table_offset
+ table
->length
> all_tables_size
) {
807 acpi_os_unmap_memory(table
, ACPI_HEADER_SIZE
);
812 table_offset
+= table
->length
;
814 if (memcmp(existing_table
->signature
, table
->signature
, 4)) {
815 acpi_os_unmap_memory(table
,
820 /* Only override tables with matching oem id */
821 if (memcmp(table
->oem_table_id
, existing_table
->oem_table_id
,
822 ACPI_OEM_TABLE_ID_SIZE
)) {
823 acpi_os_unmap_memory(table
,
828 table_offset
-= table
->length
;
829 *table_length
= table
->length
;
830 acpi_os_unmap_memory(table
, ACPI_HEADER_SIZE
);
831 *address
= acpi_tables_addr
+ table_offset
;
833 } while (table_offset
+ ACPI_HEADER_SIZE
< all_tables_size
);
836 acpi_table_taint(existing_table
);
841 static irqreturn_t
acpi_irq(int irq
, void *dev_id
)
845 handled
= (*acpi_irq_handler
) (acpi_irq_context
);
851 acpi_irq_not_handled
++;
857 acpi_os_install_interrupt_handler(u32 gsi
, acpi_osd_handler handler
,
862 acpi_irq_stats_init();
865 * ACPI interrupts different from the SCI in our copy of the FADT are
868 if (gsi
!= acpi_gbl_FADT
.sci_interrupt
)
869 return AE_BAD_PARAMETER
;
871 if (acpi_irq_handler
)
872 return AE_ALREADY_ACQUIRED
;
874 if (acpi_gsi_to_irq(gsi
, &irq
) < 0) {
875 printk(KERN_ERR PREFIX
"SCI (ACPI GSI %d) not registered\n",
880 acpi_irq_handler
= handler
;
881 acpi_irq_context
= context
;
882 if (request_irq(irq
, acpi_irq
, IRQF_SHARED
, "acpi", acpi_irq
)) {
883 printk(KERN_ERR PREFIX
"SCI (IRQ%d) allocation failed\n", irq
);
884 acpi_irq_handler
= NULL
;
885 return AE_NOT_ACQUIRED
;
892 acpi_status
acpi_os_remove_interrupt_handler(u32 gsi
, acpi_osd_handler handler
)
894 if (gsi
!= acpi_gbl_FADT
.sci_interrupt
|| !acpi_sci_irq_valid())
895 return AE_BAD_PARAMETER
;
897 free_irq(acpi_sci_irq
, acpi_irq
);
898 acpi_irq_handler
= NULL
;
899 acpi_sci_irq
= INVALID_ACPI_IRQ
;
905 * Running in interpreter thread context, safe to sleep
908 void acpi_os_sleep(u64 ms
)
913 void acpi_os_stall(u32 us
)
921 touch_nmi_watchdog();
927 * Support ACPI 3.0 AML Timer operand
928 * Returns 64-bit free-running, monotonically increasing timer
929 * with 100ns granularity
931 u64
acpi_os_get_timer(void)
933 u64 time_ns
= ktime_to_ns(ktime_get());
934 do_div(time_ns
, 100);
938 acpi_status
acpi_os_read_port(acpi_io_address port
, u32
* value
, u32 width
)
947 *(u8
*) value
= inb(port
);
948 } else if (width
<= 16) {
949 *(u16
*) value
= inw(port
);
950 } else if (width
<= 32) {
951 *(u32
*) value
= inl(port
);
959 EXPORT_SYMBOL(acpi_os_read_port
);
961 acpi_status
acpi_os_write_port(acpi_io_address port
, u32 value
, u32 width
)
965 } else if (width
<= 16) {
967 } else if (width
<= 32) {
976 EXPORT_SYMBOL(acpi_os_write_port
);
979 acpi_os_read_memory(acpi_physical_address phys_addr
, u64
*value
, u32 width
)
981 void __iomem
*virt_addr
;
982 unsigned int size
= width
/ 8;
987 virt_addr
= acpi_map_vaddr_lookup(phys_addr
, size
);
990 virt_addr
= acpi_os_ioremap(phys_addr
, size
);
992 return AE_BAD_ADDRESS
;
1001 *(u8
*) value
= readb(virt_addr
);
1004 *(u16
*) value
= readw(virt_addr
);
1007 *(u32
*) value
= readl(virt_addr
);
1010 *(u64
*) value
= readq(virt_addr
);
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 writeq(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 #ifdef CONFIG_ACPI_DEBUGGER
1134 static struct acpi_debugger acpi_debugger
;
1135 static bool acpi_debugger_initialized
;
1137 int acpi_register_debugger(struct module
*owner
,
1138 const struct acpi_debugger_ops
*ops
)
1142 mutex_lock(&acpi_debugger
.lock
);
1143 if (acpi_debugger
.ops
) {
1148 acpi_debugger
.owner
= owner
;
1149 acpi_debugger
.ops
= ops
;
1152 mutex_unlock(&acpi_debugger
.lock
);
1155 EXPORT_SYMBOL(acpi_register_debugger
);
1157 void acpi_unregister_debugger(const struct acpi_debugger_ops
*ops
)
1159 mutex_lock(&acpi_debugger
.lock
);
1160 if (ops
== acpi_debugger
.ops
) {
1161 acpi_debugger
.ops
= NULL
;
1162 acpi_debugger
.owner
= NULL
;
1164 mutex_unlock(&acpi_debugger
.lock
);
1166 EXPORT_SYMBOL(acpi_unregister_debugger
);
1168 int acpi_debugger_create_thread(acpi_osd_exec_callback function
, void *context
)
1171 int (*func
)(acpi_osd_exec_callback
, void *);
1172 struct module
*owner
;
1174 if (!acpi_debugger_initialized
)
1176 mutex_lock(&acpi_debugger
.lock
);
1177 if (!acpi_debugger
.ops
) {
1181 if (!try_module_get(acpi_debugger
.owner
)) {
1185 func
= acpi_debugger
.ops
->create_thread
;
1186 owner
= acpi_debugger
.owner
;
1187 mutex_unlock(&acpi_debugger
.lock
);
1189 ret
= func(function
, context
);
1191 mutex_lock(&acpi_debugger
.lock
);
1194 mutex_unlock(&acpi_debugger
.lock
);
1198 ssize_t
acpi_debugger_write_log(const char *msg
)
1201 ssize_t (*func
)(const char *);
1202 struct module
*owner
;
1204 if (!acpi_debugger_initialized
)
1206 mutex_lock(&acpi_debugger
.lock
);
1207 if (!acpi_debugger
.ops
) {
1211 if (!try_module_get(acpi_debugger
.owner
)) {
1215 func
= acpi_debugger
.ops
->write_log
;
1216 owner
= acpi_debugger
.owner
;
1217 mutex_unlock(&acpi_debugger
.lock
);
1221 mutex_lock(&acpi_debugger
.lock
);
1224 mutex_unlock(&acpi_debugger
.lock
);
1228 ssize_t
acpi_debugger_read_cmd(char *buffer
, size_t buffer_length
)
1231 ssize_t (*func
)(char *, size_t);
1232 struct module
*owner
;
1234 if (!acpi_debugger_initialized
)
1236 mutex_lock(&acpi_debugger
.lock
);
1237 if (!acpi_debugger
.ops
) {
1241 if (!try_module_get(acpi_debugger
.owner
)) {
1245 func
= acpi_debugger
.ops
->read_cmd
;
1246 owner
= acpi_debugger
.owner
;
1247 mutex_unlock(&acpi_debugger
.lock
);
1249 ret
= func(buffer
, buffer_length
);
1251 mutex_lock(&acpi_debugger
.lock
);
1254 mutex_unlock(&acpi_debugger
.lock
);
1258 int acpi_debugger_wait_command_ready(void)
1261 int (*func
)(bool, char *, size_t);
1262 struct module
*owner
;
1264 if (!acpi_debugger_initialized
)
1266 mutex_lock(&acpi_debugger
.lock
);
1267 if (!acpi_debugger
.ops
) {
1271 if (!try_module_get(acpi_debugger
.owner
)) {
1275 func
= acpi_debugger
.ops
->wait_command_ready
;
1276 owner
= acpi_debugger
.owner
;
1277 mutex_unlock(&acpi_debugger
.lock
);
1279 ret
= func(acpi_gbl_method_executing
,
1280 acpi_gbl_db_line_buf
, ACPI_DB_LINE_BUFFER_SIZE
);
1282 mutex_lock(&acpi_debugger
.lock
);
1285 mutex_unlock(&acpi_debugger
.lock
);
1289 int acpi_debugger_notify_command_complete(void)
1293 struct module
*owner
;
1295 if (!acpi_debugger_initialized
)
1297 mutex_lock(&acpi_debugger
.lock
);
1298 if (!acpi_debugger
.ops
) {
1302 if (!try_module_get(acpi_debugger
.owner
)) {
1306 func
= acpi_debugger
.ops
->notify_command_complete
;
1307 owner
= acpi_debugger
.owner
;
1308 mutex_unlock(&acpi_debugger
.lock
);
1312 mutex_lock(&acpi_debugger
.lock
);
1315 mutex_unlock(&acpi_debugger
.lock
);
1319 int __init
acpi_debugger_init(void)
1321 mutex_init(&acpi_debugger
.lock
);
1322 acpi_debugger_initialized
= true;
1327 /*******************************************************************************
1329 * FUNCTION: acpi_os_execute
1331 * PARAMETERS: Type - Type of the callback
1332 * Function - Function to be executed
1333 * Context - Function parameters
1337 * DESCRIPTION: Depending on type, either queues function for deferred execution or
1338 * immediately executes function on a separate thread.
1340 ******************************************************************************/
1342 acpi_status
acpi_os_execute(acpi_execute_type type
,
1343 acpi_osd_exec_callback function
, void *context
)
1345 acpi_status status
= AE_OK
;
1346 struct acpi_os_dpc
*dpc
;
1347 struct workqueue_struct
*queue
;
1349 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
,
1350 "Scheduling function [%p(%p)] for deferred execution.\n",
1351 function
, context
));
1353 if (type
== OSL_DEBUGGER_MAIN_THREAD
) {
1354 ret
= acpi_debugger_create_thread(function
, context
);
1356 pr_err("Call to kthread_create() failed.\n");
1363 * Allocate/initialize DPC structure. Note that this memory will be
1364 * freed by the callee. The kernel handles the work_struct list in a
1365 * way that allows us to also free its memory inside the callee.
1366 * Because we may want to schedule several tasks with different
1367 * parameters we can't use the approach some kernel code uses of
1368 * having a static work_struct.
1371 dpc
= kzalloc(sizeof(struct acpi_os_dpc
), GFP_ATOMIC
);
1373 return AE_NO_MEMORY
;
1375 dpc
->function
= function
;
1376 dpc
->context
= context
;
1379 * To prevent lockdep from complaining unnecessarily, make sure that
1380 * there is a different static lockdep key for each workqueue by using
1381 * INIT_WORK() for each of them separately.
1383 if (type
== OSL_NOTIFY_HANDLER
) {
1384 queue
= kacpi_notify_wq
;
1385 INIT_WORK(&dpc
->work
, acpi_os_execute_deferred
);
1386 } else if (type
== OSL_GPE_HANDLER
) {
1388 INIT_WORK(&dpc
->work
, acpi_os_execute_deferred
);
1390 pr_err("Unsupported os_execute type %d.\n", type
);
1394 if (ACPI_FAILURE(status
))
1398 * On some machines, a software-initiated SMI causes corruption unless
1399 * the SMI runs on CPU 0. An SMI can be initiated by any AML, but
1400 * typically it's done in GPE-related methods that are run via
1401 * workqueues, so we can avoid the known corruption cases by always
1402 * queueing on CPU 0.
1404 ret
= queue_work_on(0, queue
, &dpc
->work
);
1406 printk(KERN_ERR PREFIX
1407 "Call to queue_work() failed.\n");
1411 if (ACPI_FAILURE(status
))
1416 EXPORT_SYMBOL(acpi_os_execute
);
1418 void acpi_os_wait_events_complete(void)
1421 * Make sure the GPE handler or the fixed event handler is not used
1422 * on another CPU after removal.
1424 if (acpi_sci_irq_valid())
1425 synchronize_hardirq(acpi_sci_irq
);
1426 flush_workqueue(kacpid_wq
);
1427 flush_workqueue(kacpi_notify_wq
);
1430 struct acpi_hp_work
{
1431 struct work_struct work
;
1432 struct acpi_device
*adev
;
1436 static void acpi_hotplug_work_fn(struct work_struct
*work
)
1438 struct acpi_hp_work
*hpw
= container_of(work
, struct acpi_hp_work
, work
);
1440 acpi_os_wait_events_complete();
1441 acpi_device_hotplug(hpw
->adev
, hpw
->src
);
1445 acpi_status
acpi_hotplug_schedule(struct acpi_device
*adev
, u32 src
)
1447 struct acpi_hp_work
*hpw
;
1449 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
,
1450 "Scheduling hotplug event (%p, %u) for deferred execution.\n",
1453 hpw
= kmalloc(sizeof(*hpw
), GFP_KERNEL
);
1455 return AE_NO_MEMORY
;
1457 INIT_WORK(&hpw
->work
, acpi_hotplug_work_fn
);
1461 * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because
1462 * the hotplug code may call driver .remove() functions, which may
1463 * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush
1466 if (!queue_work(kacpi_hotplug_wq
, &hpw
->work
)) {
1473 bool acpi_queue_hotplug_work(struct work_struct
*work
)
1475 return queue_work(kacpi_hotplug_wq
, work
);
1479 acpi_os_create_semaphore(u32 max_units
, u32 initial_units
, acpi_handle
* handle
)
1481 struct semaphore
*sem
= NULL
;
1483 sem
= acpi_os_allocate_zeroed(sizeof(struct semaphore
));
1485 return AE_NO_MEMORY
;
1487 sema_init(sem
, initial_units
);
1489 *handle
= (acpi_handle
*) sem
;
1491 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Creating semaphore[%p|%d].\n",
1492 *handle
, initial_units
));
1498 * TODO: A better way to delete semaphores? Linux doesn't have a
1499 * 'delete_semaphore()' function -- may result in an invalid
1500 * pointer dereference for non-synchronized consumers. Should
1501 * we at least check for blocked threads and signal/cancel them?
1504 acpi_status
acpi_os_delete_semaphore(acpi_handle handle
)
1506 struct semaphore
*sem
= (struct semaphore
*)handle
;
1509 return AE_BAD_PARAMETER
;
1511 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Deleting semaphore[%p].\n", handle
));
1513 BUG_ON(!list_empty(&sem
->wait_list
));
1521 * TODO: Support for units > 1?
1523 acpi_status
acpi_os_wait_semaphore(acpi_handle handle
, u32 units
, u16 timeout
)
1525 acpi_status status
= AE_OK
;
1526 struct semaphore
*sem
= (struct semaphore
*)handle
;
1530 if (!acpi_os_initialized
)
1533 if (!sem
|| (units
< 1))
1534 return AE_BAD_PARAMETER
;
1539 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Waiting for semaphore[%p|%d|%d]\n",
1540 handle
, units
, timeout
));
1542 if (timeout
== ACPI_WAIT_FOREVER
)
1543 jiffies
= MAX_SCHEDULE_TIMEOUT
;
1545 jiffies
= msecs_to_jiffies(timeout
);
1547 ret
= down_timeout(sem
, jiffies
);
1551 if (ACPI_FAILURE(status
)) {
1552 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
,
1553 "Failed to acquire semaphore[%p|%d|%d], %s",
1554 handle
, units
, timeout
,
1555 acpi_format_exception(status
)));
1557 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
,
1558 "Acquired semaphore[%p|%d|%d]", handle
,
1566 * TODO: Support for units > 1?
1568 acpi_status
acpi_os_signal_semaphore(acpi_handle handle
, u32 units
)
1570 struct semaphore
*sem
= (struct semaphore
*)handle
;
1572 if (!acpi_os_initialized
)
1575 if (!sem
|| (units
< 1))
1576 return AE_BAD_PARAMETER
;
1581 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Signaling semaphore[%p|%d]\n", handle
,
1589 acpi_status
acpi_os_get_line(char *buffer
, u32 buffer_length
, u32
*bytes_read
)
1591 #ifdef ENABLE_DEBUGGER
1592 if (acpi_in_debugger
) {
1595 kdb_read(buffer
, buffer_length
);
1597 /* remove the CR kdb includes */
1598 chars
= strlen(buffer
) - 1;
1599 buffer
[chars
] = '\0';
1604 ret
= acpi_debugger_read_cmd(buffer
, buffer_length
);
1613 EXPORT_SYMBOL(acpi_os_get_line
);
1615 acpi_status
acpi_os_wait_command_ready(void)
1619 ret
= acpi_debugger_wait_command_ready();
1625 acpi_status
acpi_os_notify_command_complete(void)
1629 ret
= acpi_debugger_notify_command_complete();
1635 acpi_status
acpi_os_signal(u32 function
, void *info
)
1638 case ACPI_SIGNAL_FATAL
:
1639 printk(KERN_ERR PREFIX
"Fatal opcode executed\n");
1641 case ACPI_SIGNAL_BREAKPOINT
:
1644 * ACPI spec. says to treat it as a NOP unless
1645 * you are debugging. So if/when we integrate
1646 * AML debugger into the kernel debugger its
1647 * hook will go here. But until then it is
1648 * not useful to print anything on breakpoints.
1658 static int __init
acpi_os_name_setup(char *str
)
1660 char *p
= acpi_os_name
;
1661 int count
= ACPI_MAX_OVERRIDE_LEN
- 1;
1666 for (; count
-- && *str
; str
++) {
1667 if (isalnum(*str
) || *str
== ' ' || *str
== ':')
1669 else if (*str
== '\'' || *str
== '"')
1680 __setup("acpi_os_name=", acpi_os_name_setup
);
1682 #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
1683 #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */
1685 struct osi_setup_entry
{
1686 char string
[OSI_STRING_LENGTH_MAX
];
1690 static struct osi_setup_entry
1691 osi_setup_entries
[OSI_STRING_ENTRIES_MAX
] __initdata
= {
1692 {"Module Device", true},
1693 {"Processor Device", true},
1694 {"3.0 _SCP Extensions", true},
1695 {"Processor Aggregator Device", true},
1698 void __init
acpi_osi_setup(char *str
)
1700 struct osi_setup_entry
*osi
;
1704 if (!acpi_gbl_create_osi_method
)
1707 if (str
== NULL
|| *str
== '\0') {
1708 printk(KERN_INFO PREFIX
"_OSI method disabled\n");
1709 acpi_gbl_create_osi_method
= FALSE
;
1716 osi_linux
.default_disabling
= 1;
1718 } else if (*str
== '*') {
1719 acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS
);
1720 for (i
= 0; i
< OSI_STRING_ENTRIES_MAX
; i
++) {
1721 osi
= &osi_setup_entries
[i
];
1722 osi
->enable
= false;
1729 for (i
= 0; i
< OSI_STRING_ENTRIES_MAX
; i
++) {
1730 osi
= &osi_setup_entries
[i
];
1731 if (!strcmp(osi
->string
, str
)) {
1732 osi
->enable
= enable
;
1734 } else if (osi
->string
[0] == '\0') {
1735 osi
->enable
= enable
;
1736 strncpy(osi
->string
, str
, OSI_STRING_LENGTH_MAX
);
1742 static void __init
set_osi_linux(unsigned int enable
)
1744 if (osi_linux
.enable
!= enable
)
1745 osi_linux
.enable
= enable
;
1747 if (osi_linux
.enable
)
1748 acpi_osi_setup("Linux");
1750 acpi_osi_setup("!Linux");
1755 static void __init
acpi_cmdline_osi_linux(unsigned int enable
)
1757 osi_linux
.cmdline
= 1; /* cmdline set the default and override DMI */
1759 set_osi_linux(enable
);
1764 void __init
acpi_dmi_osi_linux(int enable
, const struct dmi_system_id
*d
)
1766 printk(KERN_NOTICE PREFIX
"DMI detected: %s\n", d
->ident
);
1771 osi_linux
.dmi
= 1; /* DMI knows that this box asks OSI(Linux) */
1772 set_osi_linux(enable
);
1778 * Modify the list of "OS Interfaces" reported to BIOS via _OSI
1780 * empty string disables _OSI
1781 * string starting with '!' disables that string
1782 * otherwise string is added to list, augmenting built-in strings
1784 static void __init
acpi_osi_setup_late(void)
1786 struct osi_setup_entry
*osi
;
1791 if (osi_linux
.default_disabling
) {
1792 status
= acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS
);
1794 if (ACPI_SUCCESS(status
))
1795 printk(KERN_INFO PREFIX
"Disabled all _OSI OS vendors\n");
1798 for (i
= 0; i
< OSI_STRING_ENTRIES_MAX
; i
++) {
1799 osi
= &osi_setup_entries
[i
];
1805 status
= acpi_install_interface(str
);
1807 if (ACPI_SUCCESS(status
))
1808 printk(KERN_INFO PREFIX
"Added _OSI(%s)\n", str
);
1810 status
= acpi_remove_interface(str
);
1812 if (ACPI_SUCCESS(status
))
1813 printk(KERN_INFO PREFIX
"Deleted _OSI(%s)\n", str
);
1818 static int __init
osi_setup(char *str
)
1820 if (str
&& !strcmp("Linux", str
))
1821 acpi_cmdline_osi_linux(1);
1822 else if (str
&& !strcmp("!Linux", str
))
1823 acpi_cmdline_osi_linux(0);
1825 acpi_osi_setup(str
);
1830 __setup("acpi_osi=", osi_setup
);
1833 * Disable the auto-serialization of named objects creation methods.
1835 * This feature is enabled by default. It marks the AML control methods
1836 * that contain the opcodes to create named objects as "Serialized".
1838 static int __init
acpi_no_auto_serialize_setup(char *str
)
1840 acpi_gbl_auto_serialize_methods
= FALSE
;
1841 pr_info("ACPI: auto-serialization disabled\n");
1846 __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup
);
1848 /* Check of resource interference between native drivers and ACPI
1849 * OperationRegions (SystemIO and System Memory only).
1850 * IO ports and memory declared in ACPI might be used by the ACPI subsystem
1851 * in arbitrary AML code and can interfere with legacy drivers.
1852 * acpi_enforce_resources= can be set to:
1854 * - strict (default) (2)
1855 * -> further driver trying to access the resources will not load
1857 * -> further driver trying to access the resources will load, but you
1858 * get a system message that something might go wrong...
1861 * -> ACPI Operation Region resources will not be registered
1864 #define ENFORCE_RESOURCES_STRICT 2
1865 #define ENFORCE_RESOURCES_LAX 1
1866 #define ENFORCE_RESOURCES_NO 0
1868 static unsigned int acpi_enforce_resources
= ENFORCE_RESOURCES_STRICT
;
1870 static int __init
acpi_enforce_resources_setup(char *str
)
1872 if (str
== NULL
|| *str
== '\0')
1875 if (!strcmp("strict", str
))
1876 acpi_enforce_resources
= ENFORCE_RESOURCES_STRICT
;
1877 else if (!strcmp("lax", str
))
1878 acpi_enforce_resources
= ENFORCE_RESOURCES_LAX
;
1879 else if (!strcmp("no", str
))
1880 acpi_enforce_resources
= ENFORCE_RESOURCES_NO
;
1885 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup
);
1887 /* Check for resource conflicts between ACPI OperationRegions and native
1889 int acpi_check_resource_conflict(const struct resource
*res
)
1891 acpi_adr_space_type space_id
;
1896 if (acpi_enforce_resources
== ENFORCE_RESOURCES_NO
)
1898 if (!(res
->flags
& IORESOURCE_IO
) && !(res
->flags
& IORESOURCE_MEM
))
1901 if (res
->flags
& IORESOURCE_IO
)
1902 space_id
= ACPI_ADR_SPACE_SYSTEM_IO
;
1904 space_id
= ACPI_ADR_SPACE_SYSTEM_MEMORY
;
1906 length
= resource_size(res
);
1907 if (acpi_enforce_resources
!= ENFORCE_RESOURCES_NO
)
1909 clash
= acpi_check_address_range(space_id
, res
->start
, length
, warn
);
1912 if (acpi_enforce_resources
!= ENFORCE_RESOURCES_NO
) {
1913 if (acpi_enforce_resources
== ENFORCE_RESOURCES_LAX
)
1914 printk(KERN_NOTICE
"ACPI: This conflict may"
1915 " cause random problems and system"
1917 printk(KERN_INFO
"ACPI: If an ACPI driver is available"
1918 " for this device, you should use it instead of"
1919 " the native driver\n");
1921 if (acpi_enforce_resources
== ENFORCE_RESOURCES_STRICT
)
1926 EXPORT_SYMBOL(acpi_check_resource_conflict
);
1928 int acpi_check_region(resource_size_t start
, resource_size_t n
,
1931 struct resource res
= {
1933 .end
= start
+ n
- 1,
1935 .flags
= IORESOURCE_IO
,
1938 return acpi_check_resource_conflict(&res
);
1940 EXPORT_SYMBOL(acpi_check_region
);
1943 * Let drivers know whether the resource checks are effective
1945 int acpi_resources_are_enforced(void)
1947 return acpi_enforce_resources
== ENFORCE_RESOURCES_STRICT
;
1949 EXPORT_SYMBOL(acpi_resources_are_enforced
);
1951 bool acpi_osi_is_win8(void)
1953 return acpi_gbl_osi_data
>= ACPI_OSI_WIN_8
;
1955 EXPORT_SYMBOL(acpi_osi_is_win8
);
1958 * Deallocate the memory for a spinlock.
1960 void acpi_os_delete_lock(acpi_spinlock handle
)
1966 * Acquire a spinlock.
1968 * handle is a pointer to the spinlock_t.
1971 acpi_cpu_flags
acpi_os_acquire_lock(acpi_spinlock lockp
)
1973 acpi_cpu_flags flags
;
1974 spin_lock_irqsave(lockp
, flags
);
1979 * Release a spinlock. See above.
1982 void acpi_os_release_lock(acpi_spinlock lockp
, acpi_cpu_flags flags
)
1984 spin_unlock_irqrestore(lockp
, flags
);
1987 #ifndef ACPI_USE_LOCAL_CACHE
1989 /*******************************************************************************
1991 * FUNCTION: acpi_os_create_cache
1993 * PARAMETERS: name - Ascii name for the cache
1994 * size - Size of each cached object
1995 * depth - Maximum depth of the cache (in objects) <ignored>
1996 * cache - Where the new cache object is returned
2000 * DESCRIPTION: Create a cache object
2002 ******************************************************************************/
2005 acpi_os_create_cache(char *name
, u16 size
, u16 depth
, acpi_cache_t
** cache
)
2007 *cache
= kmem_cache_create(name
, size
, 0, 0, NULL
);
2014 /*******************************************************************************
2016 * FUNCTION: acpi_os_purge_cache
2018 * PARAMETERS: Cache - Handle to cache object
2022 * DESCRIPTION: Free all objects within the requested cache.
2024 ******************************************************************************/
2026 acpi_status
acpi_os_purge_cache(acpi_cache_t
* cache
)
2028 kmem_cache_shrink(cache
);
2032 /*******************************************************************************
2034 * FUNCTION: acpi_os_delete_cache
2036 * PARAMETERS: Cache - Handle to cache object
2040 * DESCRIPTION: Free all objects within the requested cache and delete the
2043 ******************************************************************************/
2045 acpi_status
acpi_os_delete_cache(acpi_cache_t
* cache
)
2047 kmem_cache_destroy(cache
);
2051 /*******************************************************************************
2053 * FUNCTION: acpi_os_release_object
2055 * PARAMETERS: Cache - Handle to cache object
2056 * Object - The object to be released
2060 * DESCRIPTION: Release an object to the specified cache. If cache is full,
2061 * the object is deleted.
2063 ******************************************************************************/
2065 acpi_status
acpi_os_release_object(acpi_cache_t
* cache
, void *object
)
2067 kmem_cache_free(cache
, object
);
2072 static int __init
acpi_no_static_ssdt_setup(char *s
)
2074 acpi_gbl_disable_ssdt_table_install
= TRUE
;
2075 pr_info("ACPI: static SSDT installation disabled\n");
2080 early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup
);
2082 static int __init
acpi_disable_return_repair(char *s
)
2084 printk(KERN_NOTICE PREFIX
2085 "ACPI: Predefined validation mechanism disabled\n");
2086 acpi_gbl_disable_auto_repair
= TRUE
;
2091 __setup("acpica_no_return_repair", acpi_disable_return_repair
);
2093 acpi_status __init
acpi_os_initialize(void)
2095 acpi_os_map_generic_address(&acpi_gbl_FADT
.xpm1a_event_block
);
2096 acpi_os_map_generic_address(&acpi_gbl_FADT
.xpm1b_event_block
);
2097 acpi_os_map_generic_address(&acpi_gbl_FADT
.xgpe0_block
);
2098 acpi_os_map_generic_address(&acpi_gbl_FADT
.xgpe1_block
);
2099 if (acpi_gbl_FADT
.flags
& ACPI_FADT_RESET_REGISTER
) {
2101 * Use acpi_os_map_generic_address to pre-map the reset
2102 * register if it's in system memory.
2106 rv
= acpi_os_map_generic_address(&acpi_gbl_FADT
.reset_register
);
2107 pr_debug(PREFIX
"%s: map reset_reg status %d\n", __func__
, rv
);
2109 acpi_os_initialized
= true;
2114 acpi_status __init
acpi_os_initialize1(void)
2116 kacpid_wq
= alloc_workqueue("kacpid", 0, 1);
2117 kacpi_notify_wq
= alloc_workqueue("kacpi_notify", 0, 1);
2118 kacpi_hotplug_wq
= alloc_ordered_workqueue("kacpi_hotplug", 0);
2120 BUG_ON(!kacpi_notify_wq
);
2121 BUG_ON(!kacpi_hotplug_wq
);
2122 acpi_install_interface_handler(acpi_osi_handler
);
2123 acpi_osi_setup_late();
2127 acpi_status
acpi_os_terminate(void)
2129 if (acpi_irq_handler
) {
2130 acpi_os_remove_interrupt_handler(acpi_gbl_FADT
.sci_interrupt
,
2134 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.xgpe1_block
);
2135 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.xgpe0_block
);
2136 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.xpm1b_event_block
);
2137 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.xpm1a_event_block
);
2138 if (acpi_gbl_FADT
.flags
& ACPI_FADT_RESET_REGISTER
)
2139 acpi_os_unmap_generic_address(&acpi_gbl_FADT
.reset_register
);
2141 destroy_workqueue(kacpid_wq
);
2142 destroy_workqueue(kacpi_notify_wq
);
2143 destroy_workqueue(kacpi_hotplug_wq
);
2148 acpi_status
acpi_os_prepare_sleep(u8 sleep_state
, u32 pm1a_control
,
2152 if (__acpi_os_prepare_sleep
)
2153 rc
= __acpi_os_prepare_sleep(sleep_state
,
2154 pm1a_control
, pm1b_control
);
2158 return AE_CTRL_SKIP
;
2163 void acpi_os_set_prepare_sleep(int (*func
)(u8 sleep_state
,
2164 u32 pm1a_ctrl
, u32 pm1b_ctrl
))
2166 __acpi_os_prepare_sleep
= func
;
2169 acpi_status
acpi_os_prepare_extended_sleep(u8 sleep_state
, u32 val_a
,
2173 if (__acpi_os_prepare_extended_sleep
)
2174 rc
= __acpi_os_prepare_extended_sleep(sleep_state
,
2179 return AE_CTRL_SKIP
;
2184 void acpi_os_set_prepare_extended_sleep(int (*func
)(u8 sleep_state
,
2185 u32 val_a
, u32 val_b
))
2187 __acpi_os_prepare_extended_sleep
= func
;