2 * acpi_osl.c - OS-dependent functions ($Revision: 83 $)
4 * Copyright (C) 2000 Andrew Henroid
5 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
6 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
7 * Copyright (c) 2008 Intel Corporation
8 * Author: Matthew Wilcox <willy@linux.intel.com>
10 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
30 #include <linux/module.h>
31 #include <linux/kernel.h>
32 #include <linux/slab.h>
34 #include <linux/highmem.h>
35 #include <linux/pci.h>
36 #include <linux/interrupt.h>
37 #include <linux/kmod.h>
38 #include <linux/delay.h>
39 #include <linux/workqueue.h>
40 #include <linux/nmi.h>
41 #include <linux/acpi.h>
42 #include <linux/efi.h>
43 #include <linux/ioport.h>
44 #include <linux/list.h>
45 #include <linux/jiffies.h>
46 #include <linux/semaphore.h>
49 #include <asm/uaccess.h>
53 #define _COMPONENT ACPI_OS_SERVICES
54 ACPI_MODULE_NAME("osl");
57 acpi_osd_exec_callback function;
59 struct work_struct work;
62 #ifdef CONFIG_ACPI_CUSTOM_DSDT
63 #include CONFIG_ACPI_CUSTOM_DSDT_FILE
66 #ifdef ENABLE_DEBUGGER
67 #include <linux/kdb.h>
69 /* stuff for debugger support */
71 EXPORT_SYMBOL(acpi_in_debugger);
73 extern char line_buf[80];
74 #endif /*ENABLE_DEBUGGER */
76 static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl,
78 static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a,
81 static acpi_osd_handler acpi_irq_handler;
82 static void *acpi_irq_context;
83 static struct workqueue_struct *kacpid_wq;
84 static struct workqueue_struct *kacpi_notify_wq;
85 static struct workqueue_struct *kacpi_hotplug_wq;
88 * This list of permanent mappings is for memory that may be accessed from
89 * interrupt context, where we can't do the ioremap().
92 struct list_head list;
94 acpi_physical_address phys;
96 unsigned long refcount;
99 static LIST_HEAD(acpi_ioremaps);
100 static DEFINE_MUTEX(acpi_ioremap_lock);
102 static void __init acpi_osi_setup_late(void);
105 * The story of _OSI(Linux)
107 * From pre-history through Linux-2.6.22,
108 * Linux responded TRUE upon a BIOS OSI(Linux) query.
110 * Unfortunately, reference BIOS writers got wind of this
111 * and put OSI(Linux) in their example code, quickly exposing
112 * this string as ill-conceived and opening the door to
113 * an un-bounded number of BIOS incompatibilities.
115 * For example, OSI(Linux) was used on resume to re-POST a
116 * video card on one system, because Linux at that time
117 * could not do a speedy restore in its native driver.
118 * But then upon gaining quick native restore capability,
119 * Linux has no way to tell the BIOS to skip the time-consuming
120 * POST -- putting Linux at a permanent performance disadvantage.
121 * On another system, the BIOS writer used OSI(Linux)
122 * to infer native OS support for IPMI! On other systems,
123 * OSI(Linux) simply got in the way of Linux claiming to
124 * be compatible with other operating systems, exposing
125 * BIOS issues such as skipped device initialization.
127 * So "Linux" turned out to be a really poor chose of
128 * OSI string, and from Linux-2.6.23 onward we respond FALSE.
130 * BIOS writers should NOT query _OSI(Linux) on future systems.
131 * Linux will complain on the console when it sees it, and return FALSE.
132 * To get Linux to return TRUE for your system will require
133 * a kernel source update to add a DMI entry,
134 * or boot with "acpi_osi=Linux"
137 static struct osi_linux {
138 unsigned int enable:1;
140 unsigned int cmdline:1;
141 unsigned int default_disabling:1;
142 } osi_linux = {0, 0, 0, 0};
144 static u32 acpi_osi_handler(acpi_string interface, u32 supported)
146 if (!strcmp("Linux", interface)) {
148 printk_once(KERN_NOTICE FW_BUG PREFIX
149 "BIOS _OSI(Linux) query %s%s\n",
150 osi_linux.enable ? "honored" : "ignored",
151 osi_linux.cmdline ? " via cmdline" :
152 osi_linux.dmi ? " via DMI" : "");
155 if (!strcmp("Darwin", interface)) {
157 * Apple firmware will behave poorly if it receives positive
158 * answers to "Darwin" and any other OS. Respond positively
159 * to Darwin and then disable all other vendor strings.
161 acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS);
162 supported = ACPI_UINT32_MAX;
168 static void __init acpi_request_region (struct acpi_generic_address *gas,
169 unsigned int length, char *desc)
173 /* Handle possible alignment issues */
174 memcpy(&addr, &gas->address, sizeof(addr));
175 if (!addr || !length)
178 /* Resources are never freed */
179 if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
180 request_region(addr, length, desc);
181 else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
182 request_mem_region(addr, length, desc);
185 static void __init acpi_reserve_resources(void)
187 acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length,
188 "ACPI PM1a_EVT_BLK");
190 acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length,
191 "ACPI PM1b_EVT_BLK");
193 acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length,
194 "ACPI PM1a_CNT_BLK");
196 acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length,
197 "ACPI PM1b_CNT_BLK");
199 if (acpi_gbl_FADT.pm_timer_length == 4)
200 acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR");
202 acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length,
205 /* Length of GPE blocks must be a non-negative multiple of 2 */
207 if (!(acpi_gbl_FADT.gpe0_block_length & 0x1))
208 acpi_request_region(&acpi_gbl_FADT.xgpe0_block,
209 acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK");
211 if (!(acpi_gbl_FADT.gpe1_block_length & 0x1))
212 acpi_request_region(&acpi_gbl_FADT.xgpe1_block,
213 acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK");
216 void acpi_os_printf(const char *fmt, ...)
220 acpi_os_vprintf(fmt, args);
224 void acpi_os_vprintf(const char *fmt, va_list args)
226 static char buffer[512];
228 vsprintf(buffer, fmt, args);
230 #ifdef ENABLE_DEBUGGER
231 if (acpi_in_debugger) {
232 kdb_printf("%s", buffer);
234 printk(KERN_CONT "%s", buffer);
237 printk(KERN_CONT "%s", buffer);
242 static unsigned long acpi_rsdp;
243 static int __init setup_acpi_rsdp(char *arg)
245 if (kstrtoul(arg, 16, &acpi_rsdp))
249 early_param("acpi_rsdp", setup_acpi_rsdp);
252 acpi_physical_address __init acpi_os_get_root_pointer(void)
259 if (efi_enabled(EFI_CONFIG_TABLES)) {
260 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
262 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
265 printk(KERN_ERR PREFIX
266 "System description tables not found\n");
269 } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) {
270 acpi_physical_address pa = 0;
272 acpi_find_root_pointer(&pa);
279 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
280 static struct acpi_ioremap *
281 acpi_map_lookup(acpi_physical_address phys, acpi_size size)
283 struct acpi_ioremap *map;
285 list_for_each_entry_rcu(map, &acpi_ioremaps, list)
286 if (map->phys <= phys &&
287 phys + size <= map->phys + map->size)
293 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
294 static void __iomem *
295 acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size)
297 struct acpi_ioremap *map;
299 map = acpi_map_lookup(phys, size);
301 return map->virt + (phys - map->phys);
306 void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size)
308 struct acpi_ioremap *map;
309 void __iomem *virt = NULL;
311 mutex_lock(&acpi_ioremap_lock);
312 map = acpi_map_lookup(phys, size);
314 virt = map->virt + (phys - map->phys);
317 mutex_unlock(&acpi_ioremap_lock);
320 EXPORT_SYMBOL_GPL(acpi_os_get_iomem);
322 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
323 static struct acpi_ioremap *
324 acpi_map_lookup_virt(void __iomem *virt, acpi_size size)
326 struct acpi_ioremap *map;
328 list_for_each_entry_rcu(map, &acpi_ioremaps, list)
329 if (map->virt <= virt &&
330 virt + size <= map->virt + map->size)
336 #if defined(CONFIG_IA64) || defined(CONFIG_ARM64)
337 /* ioremap will take care of cache attributes */
338 #define should_use_kmap(pfn) 0
340 #define should_use_kmap(pfn) page_is_ram(pfn)
343 static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz)
347 pfn = pg_off >> PAGE_SHIFT;
348 if (should_use_kmap(pfn)) {
349 if (pg_sz > PAGE_SIZE)
351 return (void __iomem __force *)kmap(pfn_to_page(pfn));
353 return acpi_os_ioremap(pg_off, pg_sz);
356 static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr)
360 pfn = pg_off >> PAGE_SHIFT;
361 if (should_use_kmap(pfn))
362 kunmap(pfn_to_page(pfn));
367 void __iomem *__init_refok
368 acpi_os_map_iomem(acpi_physical_address phys, acpi_size size)
370 struct acpi_ioremap *map;
372 acpi_physical_address pg_off;
375 if (phys > ULONG_MAX) {
376 printk(KERN_ERR PREFIX "Cannot map memory that high\n");
380 if (!acpi_gbl_permanent_mmap)
381 return __acpi_map_table((unsigned long)phys, size);
383 mutex_lock(&acpi_ioremap_lock);
384 /* Check if there's a suitable mapping already. */
385 map = acpi_map_lookup(phys, size);
391 map = kzalloc(sizeof(*map), GFP_KERNEL);
393 mutex_unlock(&acpi_ioremap_lock);
397 pg_off = round_down(phys, PAGE_SIZE);
398 pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off;
399 virt = acpi_map(pg_off, pg_sz);
401 mutex_unlock(&acpi_ioremap_lock);
406 INIT_LIST_HEAD(&map->list);
412 list_add_tail_rcu(&map->list, &acpi_ioremaps);
415 mutex_unlock(&acpi_ioremap_lock);
416 return map->virt + (phys - map->phys);
418 EXPORT_SYMBOL_GPL(acpi_os_map_iomem);
421 acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
423 return (void *)acpi_os_map_iomem(phys, size);
425 EXPORT_SYMBOL_GPL(acpi_os_map_memory);
427 static void acpi_os_drop_map_ref(struct acpi_ioremap *map)
429 if (!--map->refcount)
430 list_del_rcu(&map->list);
433 static void acpi_os_map_cleanup(struct acpi_ioremap *map)
435 if (!map->refcount) {
436 synchronize_rcu_expedited();
437 acpi_unmap(map->phys, map->virt);
442 void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size)
444 struct acpi_ioremap *map;
446 if (!acpi_gbl_permanent_mmap) {
447 __acpi_unmap_table(virt, size);
451 mutex_lock(&acpi_ioremap_lock);
452 map = acpi_map_lookup_virt(virt, size);
454 mutex_unlock(&acpi_ioremap_lock);
455 WARN(true, PREFIX "%s: bad address %p\n", __func__, virt);
458 acpi_os_drop_map_ref(map);
459 mutex_unlock(&acpi_ioremap_lock);
461 acpi_os_map_cleanup(map);
463 EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem);
465 void __ref acpi_os_unmap_memory(void *virt, acpi_size size)
467 return acpi_os_unmap_iomem((void __iomem *)virt, size);
469 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
471 void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
473 if (!acpi_gbl_permanent_mmap)
474 __acpi_unmap_table(virt, size);
477 int acpi_os_map_generic_address(struct acpi_generic_address *gas)
482 if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
485 /* Handle possible alignment issues */
486 memcpy(&addr, &gas->address, sizeof(addr));
487 if (!addr || !gas->bit_width)
490 virt = acpi_os_map_iomem(addr, gas->bit_width / 8);
496 EXPORT_SYMBOL(acpi_os_map_generic_address);
498 void acpi_os_unmap_generic_address(struct acpi_generic_address *gas)
501 struct acpi_ioremap *map;
503 if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
506 /* Handle possible alignment issues */
507 memcpy(&addr, &gas->address, sizeof(addr));
508 if (!addr || !gas->bit_width)
511 mutex_lock(&acpi_ioremap_lock);
512 map = acpi_map_lookup(addr, gas->bit_width / 8);
514 mutex_unlock(&acpi_ioremap_lock);
517 acpi_os_drop_map_ref(map);
518 mutex_unlock(&acpi_ioremap_lock);
520 acpi_os_map_cleanup(map);
522 EXPORT_SYMBOL(acpi_os_unmap_generic_address);
524 #ifdef ACPI_FUTURE_USAGE
526 acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)
529 return AE_BAD_PARAMETER;
531 *phys = virt_to_phys(virt);
537 #define ACPI_MAX_OVERRIDE_LEN 100
539 static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
542 acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
543 acpi_string * new_val)
545 if (!init_val || !new_val)
546 return AE_BAD_PARAMETER;
549 if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {
550 printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n",
552 *new_val = acpi_os_name;
558 #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
559 #include <linux/earlycpio.h>
560 #include <linux/memblock.h>
562 static u64 acpi_tables_addr;
563 static int all_tables_size;
565 /* Copied from acpica/tbutils.c:acpi_tb_checksum() */
566 static u8 __init acpi_table_checksum(u8 *buffer, u32 length)
569 u8 *end = buffer + length;
572 sum = (u8) (sum + *(buffer++));
576 /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */
577 static const char * const table_sigs[] = {
578 ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ,
579 ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT,
580 ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF,
581 ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET,
582 ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI,
583 ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA,
584 ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT,
585 ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT,
586 ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL };
588 #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
590 #define ACPI_OVERRIDE_TABLES 64
591 static struct cpio_data __initdata acpi_initrd_files[ACPI_OVERRIDE_TABLES];
593 #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT)
595 void __init acpi_initrd_override(void *data, size_t size)
597 int sig, no, table_nr = 0, total_offset = 0;
599 struct acpi_table_header *table;
600 char cpio_path[32] = "kernel/firmware/acpi/";
601 struct cpio_data file;
603 if (data == NULL || size == 0)
606 for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) {
607 file = find_cpio_data(cpio_path, data, size, &offset);
614 if (file.size < sizeof(struct acpi_table_header)) {
615 pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n",
616 cpio_path, file.name);
622 for (sig = 0; table_sigs[sig]; sig++)
623 if (!memcmp(table->signature, table_sigs[sig], 4))
626 if (!table_sigs[sig]) {
627 pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n",
628 cpio_path, file.name);
631 if (file.size != table->length) {
632 pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n",
633 cpio_path, file.name);
636 if (acpi_table_checksum(file.data, table->length)) {
637 pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n",
638 cpio_path, file.name);
642 pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n",
643 table->signature, cpio_path, file.name, table->length);
645 all_tables_size += table->length;
646 acpi_initrd_files[table_nr].data = file.data;
647 acpi_initrd_files[table_nr].size = file.size;
654 memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT,
655 all_tables_size, PAGE_SIZE);
656 if (!acpi_tables_addr) {
661 * Only calling e820_add_reserve does not work and the
662 * tables are invalid (memory got used) later.
663 * memblock_reserve works as expected and the tables won't get modified.
664 * But it's not enough on X86 because ioremap will
665 * complain later (used by acpi_os_map_memory) that the pages
666 * that should get mapped are not marked "reserved".
667 * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area)
670 memblock_reserve(acpi_tables_addr, all_tables_size);
671 arch_reserve_mem_area(acpi_tables_addr, all_tables_size);
674 * early_ioremap only can remap 256k one time. If we map all
675 * tables one time, we will hit the limit. Need to map chunks
676 * one by one during copying the same as that in relocate_initrd().
678 for (no = 0; no < table_nr; no++) {
679 unsigned char *src_p = acpi_initrd_files[no].data;
680 phys_addr_t size = acpi_initrd_files[no].size;
681 phys_addr_t dest_addr = acpi_tables_addr + total_offset;
682 phys_addr_t slop, clen;
685 total_offset += size;
688 slop = dest_addr & ~PAGE_MASK;
690 if (clen > MAP_CHUNK_SIZE - slop)
691 clen = MAP_CHUNK_SIZE - slop;
692 dest_p = early_ioremap(dest_addr & PAGE_MASK,
694 memcpy(dest_p + slop, src_p, clen);
695 early_iounmap(dest_p, clen + slop);
702 #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */
704 static void acpi_table_taint(struct acpi_table_header *table)
707 "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n",
708 table->signature, table->oem_table_id);
709 add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE);
714 acpi_os_table_override(struct acpi_table_header * existing_table,
715 struct acpi_table_header ** new_table)
717 if (!existing_table || !new_table)
718 return AE_BAD_PARAMETER;
722 #ifdef CONFIG_ACPI_CUSTOM_DSDT
723 if (strncmp(existing_table->signature, "DSDT", 4) == 0)
724 *new_table = (struct acpi_table_header *)AmlCode;
726 if (*new_table != NULL)
727 acpi_table_taint(existing_table);
732 acpi_os_physical_table_override(struct acpi_table_header *existing_table,
733 acpi_physical_address *address,
736 #ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
741 int table_offset = 0;
742 struct acpi_table_header *table;
747 if (!acpi_tables_addr)
751 if (table_offset + ACPI_HEADER_SIZE > all_tables_size) {
756 table = acpi_os_map_memory(acpi_tables_addr + table_offset,
759 if (table_offset + table->length > all_tables_size) {
760 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
765 table_offset += table->length;
767 if (memcmp(existing_table->signature, table->signature, 4)) {
768 acpi_os_unmap_memory(table,
773 /* Only override tables with matching oem id */
774 if (memcmp(table->oem_table_id, existing_table->oem_table_id,
775 ACPI_OEM_TABLE_ID_SIZE)) {
776 acpi_os_unmap_memory(table,
781 table_offset -= table->length;
782 *table_length = table->length;
783 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
784 *address = acpi_tables_addr + table_offset;
786 } while (table_offset + ACPI_HEADER_SIZE < all_tables_size);
789 acpi_table_taint(existing_table);
794 static irqreturn_t acpi_irq(int irq, void *dev_id)
798 handled = (*acpi_irq_handler) (acpi_irq_context);
804 acpi_irq_not_handled++;
810 acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
815 acpi_irq_stats_init();
818 * ACPI interrupts different from the SCI in our copy of the FADT are
821 if (gsi != acpi_gbl_FADT.sci_interrupt)
822 return AE_BAD_PARAMETER;
824 if (acpi_irq_handler)
825 return AE_ALREADY_ACQUIRED;
827 if (acpi_gsi_to_irq(gsi, &irq) < 0) {
828 printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n",
833 acpi_irq_handler = handler;
834 acpi_irq_context = context;
835 if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
836 printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq);
837 acpi_irq_handler = NULL;
838 return AE_NOT_ACQUIRED;
844 acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler)
846 if (irq != acpi_gbl_FADT.sci_interrupt)
847 return AE_BAD_PARAMETER;
849 free_irq(irq, acpi_irq);
850 acpi_irq_handler = NULL;
856 * Running in interpreter thread context, safe to sleep
859 void acpi_os_sleep(u64 ms)
864 void acpi_os_stall(u32 us)
872 touch_nmi_watchdog();
878 * Support ACPI 3.0 AML Timer operand
879 * Returns 64-bit free-running, monotonically increasing timer
880 * with 100ns granularity
882 u64 acpi_os_get_timer(void)
884 u64 time_ns = ktime_to_ns(ktime_get());
885 do_div(time_ns, 100);
889 acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
898 *(u8 *) value = inb(port);
899 } else if (width <= 16) {
900 *(u16 *) value = inw(port);
901 } else if (width <= 32) {
902 *(u32 *) value = inl(port);
910 EXPORT_SYMBOL(acpi_os_read_port);
912 acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
916 } else if (width <= 16) {
918 } else if (width <= 32) {
927 EXPORT_SYMBOL(acpi_os_write_port);
930 static inline u64 read64(const volatile void __iomem *addr)
935 static inline u64 read64(const volatile void __iomem *addr)
940 return l | (h << 32);
945 acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width)
947 void __iomem *virt_addr;
948 unsigned int size = width / 8;
953 virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
956 virt_addr = acpi_os_ioremap(phys_addr, size);
958 return AE_BAD_ADDRESS;
967 *(u8 *) value = readb(virt_addr);
970 *(u16 *) value = readw(virt_addr);
973 *(u32 *) value = readl(virt_addr);
976 *(u64 *) value = read64(virt_addr);
991 static inline void write64(u64 val, volatile void __iomem *addr)
996 static inline void write64(u64 val, volatile void __iomem *addr)
999 writel(val>>32, addr+4);
1004 acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width)
1006 void __iomem *virt_addr;
1007 unsigned int size = width / 8;
1011 virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
1014 virt_addr = acpi_os_ioremap(phys_addr, size);
1016 return AE_BAD_ADDRESS;
1022 writeb(value, virt_addr);
1025 writew(value, virt_addr);
1028 writel(value, virt_addr);
1031 write64(value, virt_addr);
1046 acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
1047 u64 *value, u32 width)
1053 return AE_BAD_PARAMETER;
1069 result = raw_pci_read(pci_id->segment, pci_id->bus,
1070 PCI_DEVFN(pci_id->device, pci_id->function),
1071 reg, size, &value32);
1074 return (result ? AE_ERROR : AE_OK);
1078 acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
1079 u64 value, u32 width)
1097 result = raw_pci_write(pci_id->segment, pci_id->bus,
1098 PCI_DEVFN(pci_id->device, pci_id->function),
1101 return (result ? AE_ERROR : AE_OK);
1104 static void acpi_os_execute_deferred(struct work_struct *work)
1106 struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
1108 dpc->function(dpc->context);
1112 /*******************************************************************************
1114 * FUNCTION: acpi_os_execute
1116 * PARAMETERS: Type - Type of the callback
1117 * Function - Function to be executed
1118 * Context - Function parameters
1122 * DESCRIPTION: Depending on type, either queues function for deferred execution or
1123 * immediately executes function on a separate thread.
1125 ******************************************************************************/
1127 acpi_status acpi_os_execute(acpi_execute_type type,
1128 acpi_osd_exec_callback function, void *context)
1130 acpi_status status = AE_OK;
1131 struct acpi_os_dpc *dpc;
1132 struct workqueue_struct *queue;
1134 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
1135 "Scheduling function [%p(%p)] for deferred execution.\n",
1136 function, context));
1139 * Allocate/initialize DPC structure. Note that this memory will be
1140 * freed by the callee. The kernel handles the work_struct list in a
1141 * way that allows us to also free its memory inside the callee.
1142 * Because we may want to schedule several tasks with different
1143 * parameters we can't use the approach some kernel code uses of
1144 * having a static work_struct.
1147 dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
1149 return AE_NO_MEMORY;
1151 dpc->function = function;
1152 dpc->context = context;
1155 * To prevent lockdep from complaining unnecessarily, make sure that
1156 * there is a different static lockdep key for each workqueue by using
1157 * INIT_WORK() for each of them separately.
1159 if (type == OSL_NOTIFY_HANDLER) {
1160 queue = kacpi_notify_wq;
1161 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
1164 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
1168 * On some machines, a software-initiated SMI causes corruption unless
1169 * the SMI runs on CPU 0. An SMI can be initiated by any AML, but
1170 * typically it's done in GPE-related methods that are run via
1171 * workqueues, so we can avoid the known corruption cases by always
1172 * queueing on CPU 0.
1174 ret = queue_work_on(0, queue, &dpc->work);
1177 printk(KERN_ERR PREFIX
1178 "Call to queue_work() failed.\n");
1184 EXPORT_SYMBOL(acpi_os_execute);
1186 void acpi_os_wait_events_complete(void)
1189 * Make sure the GPE handler or the fixed event handler is not used
1190 * on another CPU after removal.
1192 if (acpi_irq_handler)
1193 synchronize_hardirq(acpi_gbl_FADT.sci_interrupt);
1194 flush_workqueue(kacpid_wq);
1195 flush_workqueue(kacpi_notify_wq);
1198 struct acpi_hp_work {
1199 struct work_struct work;
1200 struct acpi_device *adev;
1204 static void acpi_hotplug_work_fn(struct work_struct *work)
1206 struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work);
1208 acpi_os_wait_events_complete();
1209 acpi_device_hotplug(hpw->adev, hpw->src);
1213 acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src)
1215 struct acpi_hp_work *hpw;
1217 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
1218 "Scheduling hotplug event (%p, %u) for deferred execution.\n",
1221 hpw = kmalloc(sizeof(*hpw), GFP_KERNEL);
1223 return AE_NO_MEMORY;
1225 INIT_WORK(&hpw->work, acpi_hotplug_work_fn);
1229 * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because
1230 * the hotplug code may call driver .remove() functions, which may
1231 * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush
1234 if (!queue_work(kacpi_hotplug_wq, &hpw->work)) {
1241 bool acpi_queue_hotplug_work(struct work_struct *work)
1243 return queue_work(kacpi_hotplug_wq, work);
1247 acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
1249 struct semaphore *sem = NULL;
1251 sem = acpi_os_allocate_zeroed(sizeof(struct semaphore));
1253 return AE_NO_MEMORY;
1255 sema_init(sem, initial_units);
1257 *handle = (acpi_handle *) sem;
1259 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n",
1260 *handle, initial_units));
1266 * TODO: A better way to delete semaphores? Linux doesn't have a
1267 * 'delete_semaphore()' function -- may result in an invalid
1268 * pointer dereference for non-synchronized consumers. Should
1269 * we at least check for blocked threads and signal/cancel them?
1272 acpi_status acpi_os_delete_semaphore(acpi_handle handle)
1274 struct semaphore *sem = (struct semaphore *)handle;
1277 return AE_BAD_PARAMETER;
1279 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle));
1281 BUG_ON(!list_empty(&sem->wait_list));
1289 * TODO: Support for units > 1?
1291 acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
1293 acpi_status status = AE_OK;
1294 struct semaphore *sem = (struct semaphore *)handle;
1298 if (!sem || (units < 1))
1299 return AE_BAD_PARAMETER;
1304 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
1305 handle, units, timeout));
1307 if (timeout == ACPI_WAIT_FOREVER)
1308 jiffies = MAX_SCHEDULE_TIMEOUT;
1310 jiffies = msecs_to_jiffies(timeout);
1312 ret = down_timeout(sem, jiffies);
1316 if (ACPI_FAILURE(status)) {
1317 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
1318 "Failed to acquire semaphore[%p|%d|%d], %s",
1319 handle, units, timeout,
1320 acpi_format_exception(status)));
1322 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
1323 "Acquired semaphore[%p|%d|%d]", handle,
1331 * TODO: Support for units > 1?
1333 acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
1335 struct semaphore *sem = (struct semaphore *)handle;
1337 if (!sem || (units < 1))
1338 return AE_BAD_PARAMETER;
1343 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle,
1351 #ifdef ACPI_FUTURE_USAGE
1352 u32 acpi_os_get_line(char *buffer)
1355 #ifdef ENABLE_DEBUGGER
1356 if (acpi_in_debugger) {
1359 kdb_read(buffer, sizeof(line_buf));
1361 /* remove the CR kdb includes */
1362 chars = strlen(buffer) - 1;
1363 buffer[chars] = '\0';
1369 #endif /* ACPI_FUTURE_USAGE */
1371 acpi_status acpi_os_signal(u32 function, void *info)
1374 case ACPI_SIGNAL_FATAL:
1375 printk(KERN_ERR PREFIX "Fatal opcode executed\n");
1377 case ACPI_SIGNAL_BREAKPOINT:
1380 * ACPI spec. says to treat it as a NOP unless
1381 * you are debugging. So if/when we integrate
1382 * AML debugger into the kernel debugger its
1383 * hook will go here. But until then it is
1384 * not useful to print anything on breakpoints.
1394 static int __init acpi_os_name_setup(char *str)
1396 char *p = acpi_os_name;
1397 int count = ACPI_MAX_OVERRIDE_LEN - 1;
1402 for (; count-- && *str; str++) {
1403 if (isalnum(*str) || *str == ' ' || *str == ':')
1405 else if (*str == '\'' || *str == '"')
1416 __setup("acpi_os_name=", acpi_os_name_setup);
1418 #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
1419 #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */
1421 struct osi_setup_entry {
1422 char string[OSI_STRING_LENGTH_MAX];
1426 static struct osi_setup_entry
1427 osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = {
1428 {"Module Device", true},
1429 {"Processor Device", true},
1430 {"3.0 _SCP Extensions", true},
1431 {"Processor Aggregator Device", true},
1434 void __init acpi_osi_setup(char *str)
1436 struct osi_setup_entry *osi;
1440 if (!acpi_gbl_create_osi_method)
1443 if (str == NULL || *str == '\0') {
1444 printk(KERN_INFO PREFIX "_OSI method disabled\n");
1445 acpi_gbl_create_osi_method = FALSE;
1452 osi_linux.default_disabling = 1;
1454 } else if (*str == '*') {
1455 acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS);
1456 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1457 osi = &osi_setup_entries[i];
1458 osi->enable = false;
1465 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1466 osi = &osi_setup_entries[i];
1467 if (!strcmp(osi->string, str)) {
1468 osi->enable = enable;
1470 } else if (osi->string[0] == '\0') {
1471 osi->enable = enable;
1472 strncpy(osi->string, str, OSI_STRING_LENGTH_MAX);
1478 static void __init set_osi_linux(unsigned int enable)
1480 if (osi_linux.enable != enable)
1481 osi_linux.enable = enable;
1483 if (osi_linux.enable)
1484 acpi_osi_setup("Linux");
1486 acpi_osi_setup("!Linux");
1491 static void __init acpi_cmdline_osi_linux(unsigned int enable)
1493 osi_linux.cmdline = 1; /* cmdline set the default and override DMI */
1495 set_osi_linux(enable);
1500 void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d)
1502 printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
1507 osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */
1508 set_osi_linux(enable);
1514 * Modify the list of "OS Interfaces" reported to BIOS via _OSI
1516 * empty string disables _OSI
1517 * string starting with '!' disables that string
1518 * otherwise string is added to list, augmenting built-in strings
1520 static void __init acpi_osi_setup_late(void)
1522 struct osi_setup_entry *osi;
1527 if (osi_linux.default_disabling) {
1528 status = acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS);
1530 if (ACPI_SUCCESS(status))
1531 printk(KERN_INFO PREFIX "Disabled all _OSI OS vendors\n");
1534 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1535 osi = &osi_setup_entries[i];
1541 status = acpi_install_interface(str);
1543 if (ACPI_SUCCESS(status))
1544 printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
1546 status = acpi_remove_interface(str);
1548 if (ACPI_SUCCESS(status))
1549 printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
1554 static int __init osi_setup(char *str)
1556 if (str && !strcmp("Linux", str))
1557 acpi_cmdline_osi_linux(1);
1558 else if (str && !strcmp("!Linux", str))
1559 acpi_cmdline_osi_linux(0);
1561 acpi_osi_setup(str);
1566 __setup("acpi_osi=", osi_setup);
1569 * Disable the auto-serialization of named objects creation methods.
1571 * This feature is enabled by default. It marks the AML control methods
1572 * that contain the opcodes to create named objects as "Serialized".
1574 static int __init acpi_no_auto_serialize_setup(char *str)
1576 acpi_gbl_auto_serialize_methods = FALSE;
1577 pr_info("ACPI: auto-serialization disabled\n");
1582 __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup);
1584 /* Check of resource interference between native drivers and ACPI
1585 * OperationRegions (SystemIO and System Memory only).
1586 * IO ports and memory declared in ACPI might be used by the ACPI subsystem
1587 * in arbitrary AML code and can interfere with legacy drivers.
1588 * acpi_enforce_resources= can be set to:
1590 * - strict (default) (2)
1591 * -> further driver trying to access the resources will not load
1593 * -> further driver trying to access the resources will load, but you
1594 * get a system message that something might go wrong...
1597 * -> ACPI Operation Region resources will not be registered
1600 #define ENFORCE_RESOURCES_STRICT 2
1601 #define ENFORCE_RESOURCES_LAX 1
1602 #define ENFORCE_RESOURCES_NO 0
1604 static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1606 static int __init acpi_enforce_resources_setup(char *str)
1608 if (str == NULL || *str == '\0')
1611 if (!strcmp("strict", str))
1612 acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1613 else if (!strcmp("lax", str))
1614 acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
1615 else if (!strcmp("no", str))
1616 acpi_enforce_resources = ENFORCE_RESOURCES_NO;
1621 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup);
1623 /* Check for resource conflicts between ACPI OperationRegions and native
1625 int acpi_check_resource_conflict(const struct resource *res)
1627 acpi_adr_space_type space_id;
1632 if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
1634 if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM))
1637 if (res->flags & IORESOURCE_IO)
1638 space_id = ACPI_ADR_SPACE_SYSTEM_IO;
1640 space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY;
1642 length = resource_size(res);
1643 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO)
1645 clash = acpi_check_address_range(space_id, res->start, length, warn);
1648 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) {
1649 if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX)
1650 printk(KERN_NOTICE "ACPI: This conflict may"
1651 " cause random problems and system"
1653 printk(KERN_INFO "ACPI: If an ACPI driver is available"
1654 " for this device, you should use it instead of"
1655 " the native driver\n");
1657 if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
1662 EXPORT_SYMBOL(acpi_check_resource_conflict);
1664 int acpi_check_region(resource_size_t start, resource_size_t n,
1667 struct resource res = {
1669 .end = start + n - 1,
1671 .flags = IORESOURCE_IO,
1674 return acpi_check_resource_conflict(&res);
1676 EXPORT_SYMBOL(acpi_check_region);
1679 * Let drivers know whether the resource checks are effective
1681 int acpi_resources_are_enforced(void)
1683 return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT;
1685 EXPORT_SYMBOL(acpi_resources_are_enforced);
1688 * Deallocate the memory for a spinlock.
1690 void acpi_os_delete_lock(acpi_spinlock handle)
1696 * Acquire a spinlock.
1698 * handle is a pointer to the spinlock_t.
1701 acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
1703 acpi_cpu_flags flags;
1704 spin_lock_irqsave(lockp, flags);
1709 * Release a spinlock. See above.
1712 void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)
1714 spin_unlock_irqrestore(lockp, flags);
1717 #ifndef ACPI_USE_LOCAL_CACHE
1719 /*******************************************************************************
1721 * FUNCTION: acpi_os_create_cache
1723 * PARAMETERS: name - Ascii name for the cache
1724 * size - Size of each cached object
1725 * depth - Maximum depth of the cache (in objects) <ignored>
1726 * cache - Where the new cache object is returned
1730 * DESCRIPTION: Create a cache object
1732 ******************************************************************************/
1735 acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
1737 *cache = kmem_cache_create(name, size, 0, 0, NULL);
1744 /*******************************************************************************
1746 * FUNCTION: acpi_os_purge_cache
1748 * PARAMETERS: Cache - Handle to cache object
1752 * DESCRIPTION: Free all objects within the requested cache.
1754 ******************************************************************************/
1756 acpi_status acpi_os_purge_cache(acpi_cache_t * cache)
1758 kmem_cache_shrink(cache);
1762 /*******************************************************************************
1764 * FUNCTION: acpi_os_delete_cache
1766 * PARAMETERS: Cache - Handle to cache object
1770 * DESCRIPTION: Free all objects within the requested cache and delete the
1773 ******************************************************************************/
1775 acpi_status acpi_os_delete_cache(acpi_cache_t * cache)
1777 kmem_cache_destroy(cache);
1781 /*******************************************************************************
1783 * FUNCTION: acpi_os_release_object
1785 * PARAMETERS: Cache - Handle to cache object
1786 * Object - The object to be released
1790 * DESCRIPTION: Release an object to the specified cache. If cache is full,
1791 * the object is deleted.
1793 ******************************************************************************/
1795 acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
1797 kmem_cache_free(cache, object);
1802 static int __init acpi_no_static_ssdt_setup(char *s)
1804 acpi_gbl_disable_ssdt_table_install = TRUE;
1805 pr_info("ACPI: static SSDT installation disabled\n");
1810 early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup);
1812 static int __init acpi_disable_return_repair(char *s)
1814 printk(KERN_NOTICE PREFIX
1815 "ACPI: Predefined validation mechanism disabled\n");
1816 acpi_gbl_disable_auto_repair = TRUE;
1821 __setup("acpica_no_return_repair", acpi_disable_return_repair);
1823 acpi_status __init acpi_os_initialize(void)
1825 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
1826 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
1827 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block);
1828 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block);
1829 if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) {
1831 * Use acpi_os_map_generic_address to pre-map the reset
1832 * register if it's in system memory.
1836 rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register);
1837 pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv);
1843 acpi_status __init acpi_os_initialize1(void)
1845 acpi_reserve_resources();
1846 kacpid_wq = alloc_workqueue("kacpid", 0, 1);
1847 kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1);
1848 kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0);
1850 BUG_ON(!kacpi_notify_wq);
1851 BUG_ON(!kacpi_hotplug_wq);
1852 acpi_install_interface_handler(acpi_osi_handler);
1853 acpi_osi_setup_late();
1857 acpi_status acpi_os_terminate(void)
1859 if (acpi_irq_handler) {
1860 acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt,
1864 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block);
1865 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block);
1866 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
1867 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
1868 if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER)
1869 acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register);
1871 destroy_workqueue(kacpid_wq);
1872 destroy_workqueue(kacpi_notify_wq);
1873 destroy_workqueue(kacpi_hotplug_wq);
1878 acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control,
1882 if (__acpi_os_prepare_sleep)
1883 rc = __acpi_os_prepare_sleep(sleep_state,
1884 pm1a_control, pm1b_control);
1888 return AE_CTRL_SKIP;
1893 void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state,
1894 u32 pm1a_ctrl, u32 pm1b_ctrl))
1896 __acpi_os_prepare_sleep = func;
1899 acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a,
1903 if (__acpi_os_prepare_extended_sleep)
1904 rc = __acpi_os_prepare_extended_sleep(sleep_state,
1909 return AE_CTRL_SKIP;
1914 void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state,
1915 u32 val_a, u32 val_b))
1917 __acpi_os_prepare_extended_sleep = func;