2 * acpi_osl.c - OS-dependent functions ($Revision: 83 $)
4 * Copyright (C) 2000 Andrew Henroid
5 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
6 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
7 * Copyright (c) 2008 Intel Corporation
8 * Author: Matthew Wilcox <willy@linux.intel.com>
10 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
30 #include <linux/module.h>
31 #include <linux/kernel.h>
32 #include <linux/slab.h>
34 #include <linux/highmem.h>
35 #include <linux/pci.h>
36 #include <linux/interrupt.h>
37 #include <linux/kmod.h>
38 #include <linux/delay.h>
39 #include <linux/workqueue.h>
40 #include <linux/nmi.h>
41 #include <linux/acpi.h>
42 #include <linux/efi.h>
43 #include <linux/ioport.h>
44 #include <linux/list.h>
45 #include <linux/jiffies.h>
46 #include <linux/semaphore.h>
49 #include <asm/uaccess.h>
53 #define _COMPONENT ACPI_OS_SERVICES
54 ACPI_MODULE_NAME("osl");
57 acpi_osd_exec_callback function;
59 struct work_struct work;
62 #ifdef CONFIG_ACPI_CUSTOM_DSDT
63 #include CONFIG_ACPI_CUSTOM_DSDT_FILE
66 #ifdef ENABLE_DEBUGGER
67 #include <linux/kdb.h>
69 /* stuff for debugger support */
71 EXPORT_SYMBOL(acpi_in_debugger);
73 extern char line_buf[80];
74 #endif /*ENABLE_DEBUGGER */
76 static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl,
78 static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a,
81 static acpi_osd_handler acpi_irq_handler;
82 static void *acpi_irq_context;
83 static struct workqueue_struct *kacpid_wq;
84 static struct workqueue_struct *kacpi_notify_wq;
85 static struct workqueue_struct *kacpi_hotplug_wq;
88 * This list of permanent mappings is for memory that may be accessed from
89 * interrupt context, where we can't do the ioremap().
92 struct list_head list;
94 acpi_physical_address phys;
96 unsigned long refcount;
99 static LIST_HEAD(acpi_ioremaps);
100 static DEFINE_MUTEX(acpi_ioremap_lock);
102 static void __init acpi_osi_setup_late(void);
105 * The story of _OSI(Linux)
107 * From pre-history through Linux-2.6.22,
108 * Linux responded TRUE upon a BIOS OSI(Linux) query.
110 * Unfortunately, reference BIOS writers got wind of this
111 * and put OSI(Linux) in their example code, quickly exposing
112 * this string as ill-conceived and opening the door to
113 * an un-bounded number of BIOS incompatibilities.
115 * For example, OSI(Linux) was used on resume to re-POST a
116 * video card on one system, because Linux at that time
117 * could not do a speedy restore in its native driver.
118 * But then upon gaining quick native restore capability,
119 * Linux has no way to tell the BIOS to skip the time-consuming
120 * POST -- putting Linux at a permanent performance disadvantage.
121 * On another system, the BIOS writer used OSI(Linux)
122 * to infer native OS support for IPMI! On other systems,
123 * OSI(Linux) simply got in the way of Linux claiming to
124 * be compatible with other operating systems, exposing
125 * BIOS issues such as skipped device initialization.
127 * So "Linux" turned out to be a really poor chose of
128 * OSI string, and from Linux-2.6.23 onward we respond FALSE.
130 * BIOS writers should NOT query _OSI(Linux) on future systems.
131 * Linux will complain on the console when it sees it, and return FALSE.
132 * To get Linux to return TRUE for your system will require
133 * a kernel source update to add a DMI entry,
134 * or boot with "acpi_osi=Linux"
137 static struct osi_linux {
138 unsigned int enable:1;
140 unsigned int cmdline:1;
141 unsigned int default_disabling:1;
142 } osi_linux = {0, 0, 0, 0};
144 static u32 acpi_osi_handler(acpi_string interface, u32 supported)
146 if (!strcmp("Linux", interface)) {
148 printk_once(KERN_NOTICE FW_BUG PREFIX
149 "BIOS _OSI(Linux) query %s%s\n",
150 osi_linux.enable ? "honored" : "ignored",
151 osi_linux.cmdline ? " via cmdline" :
152 osi_linux.dmi ? " via DMI" : "");
155 if (!strcmp("Darwin", interface)) {
157 * Apple firmware will behave poorly if it receives positive
158 * answers to "Darwin" and any other OS. Respond positively
159 * to Darwin and then disable all other vendor strings.
161 acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS);
162 supported = ACPI_UINT32_MAX;
168 static void __init acpi_request_region (struct acpi_generic_address *gas,
169 unsigned int length, char *desc)
173 /* Handle possible alignment issues */
174 memcpy(&addr, &gas->address, sizeof(addr));
175 if (!addr || !length)
178 acpi_reserve_region(addr, length, gas->space_id, 0, desc);
181 static void __init acpi_reserve_resources(void)
183 acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length,
184 "ACPI PM1a_EVT_BLK");
186 acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length,
187 "ACPI PM1b_EVT_BLK");
189 acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length,
190 "ACPI PM1a_CNT_BLK");
192 acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length,
193 "ACPI PM1b_CNT_BLK");
195 if (acpi_gbl_FADT.pm_timer_length == 4)
196 acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR");
198 acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length,
201 /* Length of GPE blocks must be a non-negative multiple of 2 */
203 if (!(acpi_gbl_FADT.gpe0_block_length & 0x1))
204 acpi_request_region(&acpi_gbl_FADT.xgpe0_block,
205 acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK");
207 if (!(acpi_gbl_FADT.gpe1_block_length & 0x1))
208 acpi_request_region(&acpi_gbl_FADT.xgpe1_block,
209 acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK");
212 void acpi_os_printf(const char *fmt, ...)
216 acpi_os_vprintf(fmt, args);
220 void acpi_os_vprintf(const char *fmt, va_list args)
222 static char buffer[512];
224 vsprintf(buffer, fmt, args);
226 #ifdef ENABLE_DEBUGGER
227 if (acpi_in_debugger) {
228 kdb_printf("%s", buffer);
230 printk(KERN_CONT "%s", buffer);
233 printk(KERN_CONT "%s", buffer);
238 static unsigned long acpi_rsdp;
239 static int __init setup_acpi_rsdp(char *arg)
241 if (kstrtoul(arg, 16, &acpi_rsdp))
245 early_param("acpi_rsdp", setup_acpi_rsdp);
248 acpi_physical_address __init acpi_os_get_root_pointer(void)
255 if (efi_enabled(EFI_CONFIG_TABLES)) {
256 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
258 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
261 printk(KERN_ERR PREFIX
262 "System description tables not found\n");
265 } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) {
266 acpi_physical_address pa = 0;
268 acpi_find_root_pointer(&pa);
275 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
276 static struct acpi_ioremap *
277 acpi_map_lookup(acpi_physical_address phys, acpi_size size)
279 struct acpi_ioremap *map;
281 list_for_each_entry_rcu(map, &acpi_ioremaps, list)
282 if (map->phys <= phys &&
283 phys + size <= map->phys + map->size)
289 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
290 static void __iomem *
291 acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size)
293 struct acpi_ioremap *map;
295 map = acpi_map_lookup(phys, size);
297 return map->virt + (phys - map->phys);
302 void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size)
304 struct acpi_ioremap *map;
305 void __iomem *virt = NULL;
307 mutex_lock(&acpi_ioremap_lock);
308 map = acpi_map_lookup(phys, size);
310 virt = map->virt + (phys - map->phys);
313 mutex_unlock(&acpi_ioremap_lock);
316 EXPORT_SYMBOL_GPL(acpi_os_get_iomem);
318 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
319 static struct acpi_ioremap *
320 acpi_map_lookup_virt(void __iomem *virt, acpi_size size)
322 struct acpi_ioremap *map;
324 list_for_each_entry_rcu(map, &acpi_ioremaps, list)
325 if (map->virt <= virt &&
326 virt + size <= map->virt + map->size)
332 #if defined(CONFIG_IA64) || defined(CONFIG_ARM64)
333 /* ioremap will take care of cache attributes */
334 #define should_use_kmap(pfn) 0
336 #define should_use_kmap(pfn) page_is_ram(pfn)
339 static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz)
343 pfn = pg_off >> PAGE_SHIFT;
344 if (should_use_kmap(pfn)) {
345 if (pg_sz > PAGE_SIZE)
347 return (void __iomem __force *)kmap(pfn_to_page(pfn));
349 return acpi_os_ioremap(pg_off, pg_sz);
352 static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr)
356 pfn = pg_off >> PAGE_SHIFT;
357 if (should_use_kmap(pfn))
358 kunmap(pfn_to_page(pfn));
363 void __iomem *__init_refok
364 acpi_os_map_iomem(acpi_physical_address phys, acpi_size size)
366 struct acpi_ioremap *map;
368 acpi_physical_address pg_off;
371 if (phys > ULONG_MAX) {
372 printk(KERN_ERR PREFIX "Cannot map memory that high\n");
376 if (!acpi_gbl_permanent_mmap)
377 return __acpi_map_table((unsigned long)phys, size);
379 mutex_lock(&acpi_ioremap_lock);
380 /* Check if there's a suitable mapping already. */
381 map = acpi_map_lookup(phys, size);
387 map = kzalloc(sizeof(*map), GFP_KERNEL);
389 mutex_unlock(&acpi_ioremap_lock);
393 pg_off = round_down(phys, PAGE_SIZE);
394 pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off;
395 virt = acpi_map(pg_off, pg_sz);
397 mutex_unlock(&acpi_ioremap_lock);
402 INIT_LIST_HEAD(&map->list);
408 list_add_tail_rcu(&map->list, &acpi_ioremaps);
411 mutex_unlock(&acpi_ioremap_lock);
412 return map->virt + (phys - map->phys);
414 EXPORT_SYMBOL_GPL(acpi_os_map_iomem);
417 acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
419 return (void *)acpi_os_map_iomem(phys, size);
421 EXPORT_SYMBOL_GPL(acpi_os_map_memory);
423 static void acpi_os_drop_map_ref(struct acpi_ioremap *map)
425 if (!--map->refcount)
426 list_del_rcu(&map->list);
429 static void acpi_os_map_cleanup(struct acpi_ioremap *map)
431 if (!map->refcount) {
432 synchronize_rcu_expedited();
433 acpi_unmap(map->phys, map->virt);
438 void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size)
440 struct acpi_ioremap *map;
442 if (!acpi_gbl_permanent_mmap) {
443 __acpi_unmap_table(virt, size);
447 mutex_lock(&acpi_ioremap_lock);
448 map = acpi_map_lookup_virt(virt, size);
450 mutex_unlock(&acpi_ioremap_lock);
451 WARN(true, PREFIX "%s: bad address %p\n", __func__, virt);
454 acpi_os_drop_map_ref(map);
455 mutex_unlock(&acpi_ioremap_lock);
457 acpi_os_map_cleanup(map);
459 EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem);
461 void __ref acpi_os_unmap_memory(void *virt, acpi_size size)
463 return acpi_os_unmap_iomem((void __iomem *)virt, size);
465 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
467 void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
469 if (!acpi_gbl_permanent_mmap)
470 __acpi_unmap_table(virt, size);
473 int acpi_os_map_generic_address(struct acpi_generic_address *gas)
478 if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
481 /* Handle possible alignment issues */
482 memcpy(&addr, &gas->address, sizeof(addr));
483 if (!addr || !gas->bit_width)
486 virt = acpi_os_map_iomem(addr, gas->bit_width / 8);
492 EXPORT_SYMBOL(acpi_os_map_generic_address);
494 void acpi_os_unmap_generic_address(struct acpi_generic_address *gas)
497 struct acpi_ioremap *map;
499 if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
502 /* Handle possible alignment issues */
503 memcpy(&addr, &gas->address, sizeof(addr));
504 if (!addr || !gas->bit_width)
507 mutex_lock(&acpi_ioremap_lock);
508 map = acpi_map_lookup(addr, gas->bit_width / 8);
510 mutex_unlock(&acpi_ioremap_lock);
513 acpi_os_drop_map_ref(map);
514 mutex_unlock(&acpi_ioremap_lock);
516 acpi_os_map_cleanup(map);
518 EXPORT_SYMBOL(acpi_os_unmap_generic_address);
520 #ifdef ACPI_FUTURE_USAGE
522 acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)
525 return AE_BAD_PARAMETER;
527 *phys = virt_to_phys(virt);
533 #define ACPI_MAX_OVERRIDE_LEN 100
535 static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
538 acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
541 if (!init_val || !new_val)
542 return AE_BAD_PARAMETER;
545 if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {
546 printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n",
548 *new_val = acpi_os_name;
554 #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
555 #include <linux/earlycpio.h>
556 #include <linux/memblock.h>
558 static u64 acpi_tables_addr;
559 static int all_tables_size;
561 /* Copied from acpica/tbutils.c:acpi_tb_checksum() */
562 static u8 __init acpi_table_checksum(u8 *buffer, u32 length)
565 u8 *end = buffer + length;
568 sum = (u8) (sum + *(buffer++));
572 /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */
573 static const char * const table_sigs[] = {
574 ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ,
575 ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT,
576 ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF,
577 ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET,
578 ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI,
579 ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA,
580 ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT,
581 ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT,
582 ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL };
584 #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
586 #define ACPI_OVERRIDE_TABLES 64
587 static struct cpio_data __initdata acpi_initrd_files[ACPI_OVERRIDE_TABLES];
589 #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT)
591 void __init acpi_initrd_override(void *data, size_t size)
593 int sig, no, table_nr = 0, total_offset = 0;
595 struct acpi_table_header *table;
596 char cpio_path[32] = "kernel/firmware/acpi/";
597 struct cpio_data file;
599 if (data == NULL || size == 0)
602 for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) {
603 file = find_cpio_data(cpio_path, data, size, &offset);
610 if (file.size < sizeof(struct acpi_table_header)) {
611 pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n",
612 cpio_path, file.name);
618 for (sig = 0; table_sigs[sig]; sig++)
619 if (!memcmp(table->signature, table_sigs[sig], 4))
622 if (!table_sigs[sig]) {
623 pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n",
624 cpio_path, file.name);
627 if (file.size != table->length) {
628 pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n",
629 cpio_path, file.name);
632 if (acpi_table_checksum(file.data, table->length)) {
633 pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n",
634 cpio_path, file.name);
638 pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n",
639 table->signature, cpio_path, file.name, table->length);
641 all_tables_size += table->length;
642 acpi_initrd_files[table_nr].data = file.data;
643 acpi_initrd_files[table_nr].size = file.size;
650 memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT,
651 all_tables_size, PAGE_SIZE);
652 if (!acpi_tables_addr) {
657 * Only calling e820_add_reserve does not work and the
658 * tables are invalid (memory got used) later.
659 * memblock_reserve works as expected and the tables won't get modified.
660 * But it's not enough on X86 because ioremap will
661 * complain later (used by acpi_os_map_memory) that the pages
662 * that should get mapped are not marked "reserved".
663 * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area)
666 memblock_reserve(acpi_tables_addr, all_tables_size);
667 arch_reserve_mem_area(acpi_tables_addr, all_tables_size);
670 * early_ioremap only can remap 256k one time. If we map all
671 * tables one time, we will hit the limit. Need to map chunks
672 * one by one during copying the same as that in relocate_initrd().
674 for (no = 0; no < table_nr; no++) {
675 unsigned char *src_p = acpi_initrd_files[no].data;
676 phys_addr_t size = acpi_initrd_files[no].size;
677 phys_addr_t dest_addr = acpi_tables_addr + total_offset;
678 phys_addr_t slop, clen;
681 total_offset += size;
684 slop = dest_addr & ~PAGE_MASK;
686 if (clen > MAP_CHUNK_SIZE - slop)
687 clen = MAP_CHUNK_SIZE - slop;
688 dest_p = early_ioremap(dest_addr & PAGE_MASK,
690 memcpy(dest_p + slop, src_p, clen);
691 early_iounmap(dest_p, clen + slop);
698 #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */
700 static void acpi_table_taint(struct acpi_table_header *table)
703 "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n",
704 table->signature, table->oem_table_id);
705 add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE);
710 acpi_os_table_override(struct acpi_table_header * existing_table,
711 struct acpi_table_header ** new_table)
713 if (!existing_table || !new_table)
714 return AE_BAD_PARAMETER;
718 #ifdef CONFIG_ACPI_CUSTOM_DSDT
719 if (strncmp(existing_table->signature, "DSDT", 4) == 0)
720 *new_table = (struct acpi_table_header *)AmlCode;
722 if (*new_table != NULL)
723 acpi_table_taint(existing_table);
728 acpi_os_physical_table_override(struct acpi_table_header *existing_table,
729 acpi_physical_address *address,
732 #ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
737 int table_offset = 0;
738 struct acpi_table_header *table;
743 if (!acpi_tables_addr)
747 if (table_offset + ACPI_HEADER_SIZE > all_tables_size) {
752 table = acpi_os_map_memory(acpi_tables_addr + table_offset,
755 if (table_offset + table->length > all_tables_size) {
756 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
761 table_offset += table->length;
763 if (memcmp(existing_table->signature, table->signature, 4)) {
764 acpi_os_unmap_memory(table,
769 /* Only override tables with matching oem id */
770 if (memcmp(table->oem_table_id, existing_table->oem_table_id,
771 ACPI_OEM_TABLE_ID_SIZE)) {
772 acpi_os_unmap_memory(table,
777 table_offset -= table->length;
778 *table_length = table->length;
779 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
780 *address = acpi_tables_addr + table_offset;
782 } while (table_offset + ACPI_HEADER_SIZE < all_tables_size);
785 acpi_table_taint(existing_table);
790 static irqreturn_t acpi_irq(int irq, void *dev_id)
794 handled = (*acpi_irq_handler) (acpi_irq_context);
800 acpi_irq_not_handled++;
806 acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
811 acpi_irq_stats_init();
814 * ACPI interrupts different from the SCI in our copy of the FADT are
817 if (gsi != acpi_gbl_FADT.sci_interrupt)
818 return AE_BAD_PARAMETER;
820 if (acpi_irq_handler)
821 return AE_ALREADY_ACQUIRED;
823 if (acpi_gsi_to_irq(gsi, &irq) < 0) {
824 printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n",
829 acpi_irq_handler = handler;
830 acpi_irq_context = context;
831 if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
832 printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq);
833 acpi_irq_handler = NULL;
834 return AE_NOT_ACQUIRED;
840 acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler)
842 if (irq != acpi_gbl_FADT.sci_interrupt)
843 return AE_BAD_PARAMETER;
845 free_irq(irq, acpi_irq);
846 acpi_irq_handler = NULL;
852 * Running in interpreter thread context, safe to sleep
855 void acpi_os_sleep(u64 ms)
860 void acpi_os_stall(u32 us)
868 touch_nmi_watchdog();
874 * Support ACPI 3.0 AML Timer operand
875 * Returns 64-bit free-running, monotonically increasing timer
876 * with 100ns granularity
878 u64 acpi_os_get_timer(void)
880 u64 time_ns = ktime_to_ns(ktime_get());
881 do_div(time_ns, 100);
885 acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
894 *(u8 *) value = inb(port);
895 } else if (width <= 16) {
896 *(u16 *) value = inw(port);
897 } else if (width <= 32) {
898 *(u32 *) value = inl(port);
906 EXPORT_SYMBOL(acpi_os_read_port);
908 acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
912 } else if (width <= 16) {
914 } else if (width <= 32) {
923 EXPORT_SYMBOL(acpi_os_write_port);
926 static inline u64 read64(const volatile void __iomem *addr)
931 static inline u64 read64(const volatile void __iomem *addr)
936 return l | (h << 32);
941 acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width)
943 void __iomem *virt_addr;
944 unsigned int size = width / 8;
949 virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
952 virt_addr = acpi_os_ioremap(phys_addr, size);
954 return AE_BAD_ADDRESS;
963 *(u8 *) value = readb(virt_addr);
966 *(u16 *) value = readw(virt_addr);
969 *(u32 *) value = readl(virt_addr);
972 *(u64 *) value = read64(virt_addr);
987 static inline void write64(u64 val, volatile void __iomem *addr)
992 static inline void write64(u64 val, volatile void __iomem *addr)
995 writel(val>>32, addr+4);
1000 acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width)
1002 void __iomem *virt_addr;
1003 unsigned int size = width / 8;
1007 virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
1010 virt_addr = acpi_os_ioremap(phys_addr, size);
1012 return AE_BAD_ADDRESS;
1018 writeb(value, virt_addr);
1021 writew(value, virt_addr);
1024 writel(value, virt_addr);
1027 write64(value, virt_addr);
1042 acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
1043 u64 *value, u32 width)
1049 return AE_BAD_PARAMETER;
1065 result = raw_pci_read(pci_id->segment, pci_id->bus,
1066 PCI_DEVFN(pci_id->device, pci_id->function),
1067 reg, size, &value32);
1070 return (result ? AE_ERROR : AE_OK);
1074 acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
1075 u64 value, u32 width)
1093 result = raw_pci_write(pci_id->segment, pci_id->bus,
1094 PCI_DEVFN(pci_id->device, pci_id->function),
1097 return (result ? AE_ERROR : AE_OK);
1100 static void acpi_os_execute_deferred(struct work_struct *work)
1102 struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
1104 dpc->function(dpc->context);
1108 /*******************************************************************************
1110 * FUNCTION: acpi_os_execute
1112 * PARAMETERS: Type - Type of the callback
1113 * Function - Function to be executed
1114 * Context - Function parameters
1118 * DESCRIPTION: Depending on type, either queues function for deferred execution or
1119 * immediately executes function on a separate thread.
1121 ******************************************************************************/
1123 acpi_status acpi_os_execute(acpi_execute_type type,
1124 acpi_osd_exec_callback function, void *context)
1126 acpi_status status = AE_OK;
1127 struct acpi_os_dpc *dpc;
1128 struct workqueue_struct *queue;
1130 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
1131 "Scheduling function [%p(%p)] for deferred execution.\n",
1132 function, context));
1135 * Allocate/initialize DPC structure. Note that this memory will be
1136 * freed by the callee. The kernel handles the work_struct list in a
1137 * way that allows us to also free its memory inside the callee.
1138 * Because we may want to schedule several tasks with different
1139 * parameters we can't use the approach some kernel code uses of
1140 * having a static work_struct.
1143 dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
1145 return AE_NO_MEMORY;
1147 dpc->function = function;
1148 dpc->context = context;
1151 * To prevent lockdep from complaining unnecessarily, make sure that
1152 * there is a different static lockdep key for each workqueue by using
1153 * INIT_WORK() for each of them separately.
1155 if (type == OSL_NOTIFY_HANDLER) {
1156 queue = kacpi_notify_wq;
1157 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
1160 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
1164 * On some machines, a software-initiated SMI causes corruption unless
1165 * the SMI runs on CPU 0. An SMI can be initiated by any AML, but
1166 * typically it's done in GPE-related methods that are run via
1167 * workqueues, so we can avoid the known corruption cases by always
1168 * queueing on CPU 0.
1170 ret = queue_work_on(0, queue, &dpc->work);
1173 printk(KERN_ERR PREFIX
1174 "Call to queue_work() failed.\n");
1180 EXPORT_SYMBOL(acpi_os_execute);
1182 void acpi_os_wait_events_complete(void)
1185 * Make sure the GPE handler or the fixed event handler is not used
1186 * on another CPU after removal.
1188 if (acpi_irq_handler)
1189 synchronize_hardirq(acpi_gbl_FADT.sci_interrupt);
1190 flush_workqueue(kacpid_wq);
1191 flush_workqueue(kacpi_notify_wq);
1194 struct acpi_hp_work {
1195 struct work_struct work;
1196 struct acpi_device *adev;
1200 static void acpi_hotplug_work_fn(struct work_struct *work)
1202 struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work);
1204 acpi_os_wait_events_complete();
1205 acpi_device_hotplug(hpw->adev, hpw->src);
1209 acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src)
1211 struct acpi_hp_work *hpw;
1213 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
1214 "Scheduling hotplug event (%p, %u) for deferred execution.\n",
1217 hpw = kmalloc(sizeof(*hpw), GFP_KERNEL);
1219 return AE_NO_MEMORY;
1221 INIT_WORK(&hpw->work, acpi_hotplug_work_fn);
1225 * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because
1226 * the hotplug code may call driver .remove() functions, which may
1227 * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush
1230 if (!queue_work(kacpi_hotplug_wq, &hpw->work)) {
1237 bool acpi_queue_hotplug_work(struct work_struct *work)
1239 return queue_work(kacpi_hotplug_wq, work);
1243 acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
1245 struct semaphore *sem = NULL;
1247 sem = acpi_os_allocate_zeroed(sizeof(struct semaphore));
1249 return AE_NO_MEMORY;
1251 sema_init(sem, initial_units);
1253 *handle = (acpi_handle *) sem;
1255 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n",
1256 *handle, initial_units));
1262 * TODO: A better way to delete semaphores? Linux doesn't have a
1263 * 'delete_semaphore()' function -- may result in an invalid
1264 * pointer dereference for non-synchronized consumers. Should
1265 * we at least check for blocked threads and signal/cancel them?
1268 acpi_status acpi_os_delete_semaphore(acpi_handle handle)
1270 struct semaphore *sem = (struct semaphore *)handle;
1273 return AE_BAD_PARAMETER;
1275 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle));
1277 BUG_ON(!list_empty(&sem->wait_list));
1285 * TODO: Support for units > 1?
1287 acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
1289 acpi_status status = AE_OK;
1290 struct semaphore *sem = (struct semaphore *)handle;
1294 if (!sem || (units < 1))
1295 return AE_BAD_PARAMETER;
1300 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
1301 handle, units, timeout));
1303 if (timeout == ACPI_WAIT_FOREVER)
1304 jiffies = MAX_SCHEDULE_TIMEOUT;
1306 jiffies = msecs_to_jiffies(timeout);
1308 ret = down_timeout(sem, jiffies);
1312 if (ACPI_FAILURE(status)) {
1313 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
1314 "Failed to acquire semaphore[%p|%d|%d], %s",
1315 handle, units, timeout,
1316 acpi_format_exception(status)));
1318 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
1319 "Acquired semaphore[%p|%d|%d]", handle,
1327 * TODO: Support for units > 1?
1329 acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
1331 struct semaphore *sem = (struct semaphore *)handle;
1333 if (!sem || (units < 1))
1334 return AE_BAD_PARAMETER;
1339 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle,
1347 #ifdef ACPI_FUTURE_USAGE
1348 u32 acpi_os_get_line(char *buffer)
1351 #ifdef ENABLE_DEBUGGER
1352 if (acpi_in_debugger) {
1355 kdb_read(buffer, sizeof(line_buf));
1357 /* remove the CR kdb includes */
1358 chars = strlen(buffer) - 1;
1359 buffer[chars] = '\0';
1365 #endif /* ACPI_FUTURE_USAGE */
1367 acpi_status acpi_os_signal(u32 function, void *info)
1370 case ACPI_SIGNAL_FATAL:
1371 printk(KERN_ERR PREFIX "Fatal opcode executed\n");
1373 case ACPI_SIGNAL_BREAKPOINT:
1376 * ACPI spec. says to treat it as a NOP unless
1377 * you are debugging. So if/when we integrate
1378 * AML debugger into the kernel debugger its
1379 * hook will go here. But until then it is
1380 * not useful to print anything on breakpoints.
1390 static int __init acpi_os_name_setup(char *str)
1392 char *p = acpi_os_name;
1393 int count = ACPI_MAX_OVERRIDE_LEN - 1;
1398 for (; count-- && *str; str++) {
1399 if (isalnum(*str) || *str == ' ' || *str == ':')
1401 else if (*str == '\'' || *str == '"')
1412 __setup("acpi_os_name=", acpi_os_name_setup);
1414 #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
1415 #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */
1417 struct osi_setup_entry {
1418 char string[OSI_STRING_LENGTH_MAX];
1422 static struct osi_setup_entry
1423 osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = {
1424 {"Module Device", true},
1425 {"Processor Device", true},
1426 {"3.0 _SCP Extensions", true},
1427 {"Processor Aggregator Device", true},
1430 void __init acpi_osi_setup(char *str)
1432 struct osi_setup_entry *osi;
1436 if (!acpi_gbl_create_osi_method)
1439 if (str == NULL || *str == '\0') {
1440 printk(KERN_INFO PREFIX "_OSI method disabled\n");
1441 acpi_gbl_create_osi_method = FALSE;
1448 osi_linux.default_disabling = 1;
1450 } else if (*str == '*') {
1451 acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS);
1452 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1453 osi = &osi_setup_entries[i];
1454 osi->enable = false;
1461 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1462 osi = &osi_setup_entries[i];
1463 if (!strcmp(osi->string, str)) {
1464 osi->enable = enable;
1466 } else if (osi->string[0] == '\0') {
1467 osi->enable = enable;
1468 strncpy(osi->string, str, OSI_STRING_LENGTH_MAX);
1474 static void __init set_osi_linux(unsigned int enable)
1476 if (osi_linux.enable != enable)
1477 osi_linux.enable = enable;
1479 if (osi_linux.enable)
1480 acpi_osi_setup("Linux");
1482 acpi_osi_setup("!Linux");
1487 static void __init acpi_cmdline_osi_linux(unsigned int enable)
1489 osi_linux.cmdline = 1; /* cmdline set the default and override DMI */
1491 set_osi_linux(enable);
1496 void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d)
1498 printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
1503 osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */
1504 set_osi_linux(enable);
1510 * Modify the list of "OS Interfaces" reported to BIOS via _OSI
1512 * empty string disables _OSI
1513 * string starting with '!' disables that string
1514 * otherwise string is added to list, augmenting built-in strings
1516 static void __init acpi_osi_setup_late(void)
1518 struct osi_setup_entry *osi;
1523 if (osi_linux.default_disabling) {
1524 status = acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS);
1526 if (ACPI_SUCCESS(status))
1527 printk(KERN_INFO PREFIX "Disabled all _OSI OS vendors\n");
1530 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1531 osi = &osi_setup_entries[i];
1537 status = acpi_install_interface(str);
1539 if (ACPI_SUCCESS(status))
1540 printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
1542 status = acpi_remove_interface(str);
1544 if (ACPI_SUCCESS(status))
1545 printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
1550 static int __init osi_setup(char *str)
1552 if (str && !strcmp("Linux", str))
1553 acpi_cmdline_osi_linux(1);
1554 else if (str && !strcmp("!Linux", str))
1555 acpi_cmdline_osi_linux(0);
1557 acpi_osi_setup(str);
1562 __setup("acpi_osi=", osi_setup);
1565 * Disable the auto-serialization of named objects creation methods.
1567 * This feature is enabled by default. It marks the AML control methods
1568 * that contain the opcodes to create named objects as "Serialized".
1570 static int __init acpi_no_auto_serialize_setup(char *str)
1572 acpi_gbl_auto_serialize_methods = FALSE;
1573 pr_info("ACPI: auto-serialization disabled\n");
1578 __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup);
1580 /* Check of resource interference between native drivers and ACPI
1581 * OperationRegions (SystemIO and System Memory only).
1582 * IO ports and memory declared in ACPI might be used by the ACPI subsystem
1583 * in arbitrary AML code and can interfere with legacy drivers.
1584 * acpi_enforce_resources= can be set to:
1586 * - strict (default) (2)
1587 * -> further driver trying to access the resources will not load
1589 * -> further driver trying to access the resources will load, but you
1590 * get a system message that something might go wrong...
1593 * -> ACPI Operation Region resources will not be registered
1596 #define ENFORCE_RESOURCES_STRICT 2
1597 #define ENFORCE_RESOURCES_LAX 1
1598 #define ENFORCE_RESOURCES_NO 0
1600 static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1602 static int __init acpi_enforce_resources_setup(char *str)
1604 if (str == NULL || *str == '\0')
1607 if (!strcmp("strict", str))
1608 acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1609 else if (!strcmp("lax", str))
1610 acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
1611 else if (!strcmp("no", str))
1612 acpi_enforce_resources = ENFORCE_RESOURCES_NO;
1617 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup);
1619 /* Check for resource conflicts between ACPI OperationRegions and native
1621 int acpi_check_resource_conflict(const struct resource *res)
1623 acpi_adr_space_type space_id;
1628 if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
1630 if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM))
1633 if (res->flags & IORESOURCE_IO)
1634 space_id = ACPI_ADR_SPACE_SYSTEM_IO;
1636 space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY;
1638 length = resource_size(res);
1639 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO)
1641 clash = acpi_check_address_range(space_id, res->start, length, warn);
1644 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) {
1645 if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX)
1646 printk(KERN_NOTICE "ACPI: This conflict may"
1647 " cause random problems and system"
1649 printk(KERN_INFO "ACPI: If an ACPI driver is available"
1650 " for this device, you should use it instead of"
1651 " the native driver\n");
1653 if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
1658 EXPORT_SYMBOL(acpi_check_resource_conflict);
1660 int acpi_check_region(resource_size_t start, resource_size_t n,
1663 struct resource res = {
1665 .end = start + n - 1,
1667 .flags = IORESOURCE_IO,
1670 return acpi_check_resource_conflict(&res);
1672 EXPORT_SYMBOL(acpi_check_region);
1675 * Let drivers know whether the resource checks are effective
1677 int acpi_resources_are_enforced(void)
1679 return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT;
1681 EXPORT_SYMBOL(acpi_resources_are_enforced);
1683 bool acpi_osi_is_win8(void)
1685 return acpi_gbl_osi_data >= ACPI_OSI_WIN_8;
1687 EXPORT_SYMBOL(acpi_osi_is_win8);
1690 * Deallocate the memory for a spinlock.
1692 void acpi_os_delete_lock(acpi_spinlock handle)
1698 * Acquire a spinlock.
1700 * handle is a pointer to the spinlock_t.
1703 acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
1705 acpi_cpu_flags flags;
1706 spin_lock_irqsave(lockp, flags);
1711 * Release a spinlock. See above.
1714 void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)
1716 spin_unlock_irqrestore(lockp, flags);
1719 #ifndef ACPI_USE_LOCAL_CACHE
1721 /*******************************************************************************
1723 * FUNCTION: acpi_os_create_cache
1725 * PARAMETERS: name - Ascii name for the cache
1726 * size - Size of each cached object
1727 * depth - Maximum depth of the cache (in objects) <ignored>
1728 * cache - Where the new cache object is returned
1732 * DESCRIPTION: Create a cache object
1734 ******************************************************************************/
1737 acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
1739 *cache = kmem_cache_create(name, size, 0, 0, NULL);
1746 /*******************************************************************************
1748 * FUNCTION: acpi_os_purge_cache
1750 * PARAMETERS: Cache - Handle to cache object
1754 * DESCRIPTION: Free all objects within the requested cache.
1756 ******************************************************************************/
1758 acpi_status acpi_os_purge_cache(acpi_cache_t * cache)
1760 kmem_cache_shrink(cache);
1764 /*******************************************************************************
1766 * FUNCTION: acpi_os_delete_cache
1768 * PARAMETERS: Cache - Handle to cache object
1772 * DESCRIPTION: Free all objects within the requested cache and delete the
1775 ******************************************************************************/
1777 acpi_status acpi_os_delete_cache(acpi_cache_t * cache)
1779 kmem_cache_destroy(cache);
1783 /*******************************************************************************
1785 * FUNCTION: acpi_os_release_object
1787 * PARAMETERS: Cache - Handle to cache object
1788 * Object - The object to be released
1792 * DESCRIPTION: Release an object to the specified cache. If cache is full,
1793 * the object is deleted.
1795 ******************************************************************************/
1797 acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
1799 kmem_cache_free(cache, object);
1804 static int __init acpi_no_static_ssdt_setup(char *s)
1806 acpi_gbl_disable_ssdt_table_install = TRUE;
1807 pr_info("ACPI: static SSDT installation disabled\n");
1812 early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup);
1814 static int __init acpi_disable_return_repair(char *s)
1816 printk(KERN_NOTICE PREFIX
1817 "ACPI: Predefined validation mechanism disabled\n");
1818 acpi_gbl_disable_auto_repair = TRUE;
1823 __setup("acpica_no_return_repair", acpi_disable_return_repair);
1825 acpi_status __init acpi_os_initialize(void)
1827 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
1828 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
1829 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block);
1830 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block);
1831 if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) {
1833 * Use acpi_os_map_generic_address to pre-map the reset
1834 * register if it's in system memory.
1838 rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register);
1839 pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv);
1845 acpi_status __init acpi_os_initialize1(void)
1847 acpi_reserve_resources();
1848 kacpid_wq = alloc_workqueue("kacpid", 0, 1);
1849 kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1);
1850 kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0);
1852 BUG_ON(!kacpi_notify_wq);
1853 BUG_ON(!kacpi_hotplug_wq);
1854 acpi_install_interface_handler(acpi_osi_handler);
1855 acpi_osi_setup_late();
1859 acpi_status acpi_os_terminate(void)
1861 if (acpi_irq_handler) {
1862 acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt,
1866 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block);
1867 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block);
1868 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
1869 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
1870 if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER)
1871 acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register);
1873 destroy_workqueue(kacpid_wq);
1874 destroy_workqueue(kacpi_notify_wq);
1875 destroy_workqueue(kacpi_hotplug_wq);
1880 acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control,
1884 if (__acpi_os_prepare_sleep)
1885 rc = __acpi_os_prepare_sleep(sleep_state,
1886 pm1a_control, pm1b_control);
1890 return AE_CTRL_SKIP;
1895 void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state,
1896 u32 pm1a_ctrl, u32 pm1b_ctrl))
1898 __acpi_os_prepare_sleep = func;
1901 acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a,
1905 if (__acpi_os_prepare_extended_sleep)
1906 rc = __acpi_os_prepare_extended_sleep(sleep_state,
1911 return AE_CTRL_SKIP;
1916 void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state,
1917 u32 val_a, u32 val_b))
1919 __acpi_os_prepare_extended_sleep = func;