2 * acpi_osl.c - OS-dependent functions ($Revision: 83 $)
4 * Copyright (C) 2000 Andrew Henroid
5 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
6 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
7 * Copyright (c) 2008 Intel Corporation
8 * Author: Matthew Wilcox <willy@linux.intel.com>
10 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
30 #include <linux/module.h>
31 #include <linux/kernel.h>
32 #include <linux/slab.h>
34 #include <linux/highmem.h>
35 #include <linux/pci.h>
36 #include <linux/interrupt.h>
37 #include <linux/kmod.h>
38 #include <linux/delay.h>
39 #include <linux/workqueue.h>
40 #include <linux/nmi.h>
41 #include <linux/acpi.h>
42 #include <linux/efi.h>
43 #include <linux/ioport.h>
44 #include <linux/list.h>
45 #include <linux/jiffies.h>
46 #include <linux/semaphore.h>
49 #include <asm/uaccess.h>
53 #define _COMPONENT ACPI_OS_SERVICES
54 ACPI_MODULE_NAME("osl");
57 acpi_osd_exec_callback function;
59 struct work_struct work;
62 #ifdef CONFIG_ACPI_CUSTOM_DSDT
63 #include CONFIG_ACPI_CUSTOM_DSDT_FILE
66 #ifdef ENABLE_DEBUGGER
67 #include <linux/kdb.h>
69 /* stuff for debugger support */
71 EXPORT_SYMBOL(acpi_in_debugger);
73 extern char line_buf[80];
74 #endif /*ENABLE_DEBUGGER */
76 static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl,
78 static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a,
81 static acpi_osd_handler acpi_irq_handler;
82 static void *acpi_irq_context;
83 static struct workqueue_struct *kacpid_wq;
84 static struct workqueue_struct *kacpi_notify_wq;
85 static struct workqueue_struct *kacpi_hotplug_wq;
88 * This list of permanent mappings is for memory that may be accessed from
89 * interrupt context, where we can't do the ioremap().
92 struct list_head list;
94 acpi_physical_address phys;
96 unsigned long refcount;
99 static LIST_HEAD(acpi_ioremaps);
100 static DEFINE_MUTEX(acpi_ioremap_lock);
102 static void __init acpi_osi_setup_late(void);
105 * The story of _OSI(Linux)
107 * From pre-history through Linux-2.6.22,
108 * Linux responded TRUE upon a BIOS OSI(Linux) query.
110 * Unfortunately, reference BIOS writers got wind of this
111 * and put OSI(Linux) in their example code, quickly exposing
112 * this string as ill-conceived and opening the door to
113 * an un-bounded number of BIOS incompatibilities.
115 * For example, OSI(Linux) was used on resume to re-POST a
116 * video card on one system, because Linux at that time
117 * could not do a speedy restore in its native driver.
118 * But then upon gaining quick native restore capability,
119 * Linux has no way to tell the BIOS to skip the time-consuming
120 * POST -- putting Linux at a permanent performance disadvantage.
121 * On another system, the BIOS writer used OSI(Linux)
122 * to infer native OS support for IPMI! On other systems,
123 * OSI(Linux) simply got in the way of Linux claiming to
124 * be compatible with other operating systems, exposing
125 * BIOS issues such as skipped device initialization.
127 * So "Linux" turned out to be a really poor chose of
128 * OSI string, and from Linux-2.6.23 onward we respond FALSE.
130 * BIOS writers should NOT query _OSI(Linux) on future systems.
131 * Linux will complain on the console when it sees it, and return FALSE.
132 * To get Linux to return TRUE for your system will require
133 * a kernel source update to add a DMI entry,
134 * or boot with "acpi_osi=Linux"
137 static struct osi_linux {
138 unsigned int enable:1;
140 unsigned int cmdline:1;
141 unsigned int default_disabling:1;
142 } osi_linux = {0, 0, 0, 0};
144 static u32 acpi_osi_handler(acpi_string interface, u32 supported)
146 if (!strcmp("Linux", interface)) {
148 printk_once(KERN_NOTICE FW_BUG PREFIX
149 "BIOS _OSI(Linux) query %s%s\n",
150 osi_linux.enable ? "honored" : "ignored",
151 osi_linux.cmdline ? " via cmdline" :
152 osi_linux.dmi ? " via DMI" : "");
155 if (!strcmp("Darwin", interface)) {
157 * Apple firmware will behave poorly if it receives positive
158 * answers to "Darwin" and any other OS. Respond positively
159 * to Darwin and then disable all other vendor strings.
161 acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS);
162 supported = ACPI_UINT32_MAX;
168 static void __init acpi_request_region (struct acpi_generic_address *gas,
169 unsigned int length, char *desc)
173 /* Handle possible alignment issues */
174 memcpy(&addr, &gas->address, sizeof(addr));
175 if (!addr || !length)
178 /* Resources are never freed */
179 if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
180 request_region(addr, length, desc);
181 else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
182 request_mem_region(addr, length, desc);
185 static int __init acpi_reserve_resources(void)
187 acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length,
188 "ACPI PM1a_EVT_BLK");
190 acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length,
191 "ACPI PM1b_EVT_BLK");
193 acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length,
194 "ACPI PM1a_CNT_BLK");
196 acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length,
197 "ACPI PM1b_CNT_BLK");
199 if (acpi_gbl_FADT.pm_timer_length == 4)
200 acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR");
202 acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length,
205 /* Length of GPE blocks must be a non-negative multiple of 2 */
207 if (!(acpi_gbl_FADT.gpe0_block_length & 0x1))
208 acpi_request_region(&acpi_gbl_FADT.xgpe0_block,
209 acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK");
211 if (!(acpi_gbl_FADT.gpe1_block_length & 0x1))
212 acpi_request_region(&acpi_gbl_FADT.xgpe1_block,
213 acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK");
217 fs_initcall_sync(acpi_reserve_resources);
219 void acpi_os_printf(const char *fmt, ...)
223 acpi_os_vprintf(fmt, args);
227 void acpi_os_vprintf(const char *fmt, va_list args)
229 static char buffer[512];
231 vsprintf(buffer, fmt, args);
233 #ifdef ENABLE_DEBUGGER
234 if (acpi_in_debugger) {
235 kdb_printf("%s", buffer);
237 printk(KERN_CONT "%s", buffer);
240 printk(KERN_CONT "%s", buffer);
245 static unsigned long acpi_rsdp;
246 static int __init setup_acpi_rsdp(char *arg)
248 if (kstrtoul(arg, 16, &acpi_rsdp))
252 early_param("acpi_rsdp", setup_acpi_rsdp);
255 acpi_physical_address __init acpi_os_get_root_pointer(void)
262 if (efi_enabled(EFI_CONFIG_TABLES)) {
263 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
265 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
268 printk(KERN_ERR PREFIX
269 "System description tables not found\n");
272 } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) {
273 acpi_physical_address pa = 0;
275 acpi_find_root_pointer(&pa);
282 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
283 static struct acpi_ioremap *
284 acpi_map_lookup(acpi_physical_address phys, acpi_size size)
286 struct acpi_ioremap *map;
288 list_for_each_entry_rcu(map, &acpi_ioremaps, list)
289 if (map->phys <= phys &&
290 phys + size <= map->phys + map->size)
296 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
297 static void __iomem *
298 acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size)
300 struct acpi_ioremap *map;
302 map = acpi_map_lookup(phys, size);
304 return map->virt + (phys - map->phys);
309 void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size)
311 struct acpi_ioremap *map;
312 void __iomem *virt = NULL;
314 mutex_lock(&acpi_ioremap_lock);
315 map = acpi_map_lookup(phys, size);
317 virt = map->virt + (phys - map->phys);
320 mutex_unlock(&acpi_ioremap_lock);
323 EXPORT_SYMBOL_GPL(acpi_os_get_iomem);
325 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
326 static struct acpi_ioremap *
327 acpi_map_lookup_virt(void __iomem *virt, acpi_size size)
329 struct acpi_ioremap *map;
331 list_for_each_entry_rcu(map, &acpi_ioremaps, list)
332 if (map->virt <= virt &&
333 virt + size <= map->virt + map->size)
339 #if defined(CONFIG_IA64) || defined(CONFIG_ARM64)
340 /* ioremap will take care of cache attributes */
341 #define should_use_kmap(pfn) 0
343 #define should_use_kmap(pfn) page_is_ram(pfn)
346 static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz)
350 pfn = pg_off >> PAGE_SHIFT;
351 if (should_use_kmap(pfn)) {
352 if (pg_sz > PAGE_SIZE)
354 return (void __iomem __force *)kmap(pfn_to_page(pfn));
356 return acpi_os_ioremap(pg_off, pg_sz);
359 static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr)
363 pfn = pg_off >> PAGE_SHIFT;
364 if (should_use_kmap(pfn))
365 kunmap(pfn_to_page(pfn));
370 void __iomem *__init_refok
371 acpi_os_map_iomem(acpi_physical_address phys, acpi_size size)
373 struct acpi_ioremap *map;
375 acpi_physical_address pg_off;
378 if (phys > ULONG_MAX) {
379 printk(KERN_ERR PREFIX "Cannot map memory that high\n");
383 if (!acpi_gbl_permanent_mmap)
384 return __acpi_map_table((unsigned long)phys, size);
386 mutex_lock(&acpi_ioremap_lock);
387 /* Check if there's a suitable mapping already. */
388 map = acpi_map_lookup(phys, size);
394 map = kzalloc(sizeof(*map), GFP_KERNEL);
396 mutex_unlock(&acpi_ioremap_lock);
400 pg_off = round_down(phys, PAGE_SIZE);
401 pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off;
402 virt = acpi_map(pg_off, pg_sz);
404 mutex_unlock(&acpi_ioremap_lock);
409 INIT_LIST_HEAD(&map->list);
415 list_add_tail_rcu(&map->list, &acpi_ioremaps);
418 mutex_unlock(&acpi_ioremap_lock);
419 return map->virt + (phys - map->phys);
421 EXPORT_SYMBOL_GPL(acpi_os_map_iomem);
424 acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
426 return (void *)acpi_os_map_iomem(phys, size);
428 EXPORT_SYMBOL_GPL(acpi_os_map_memory);
430 static void acpi_os_drop_map_ref(struct acpi_ioremap *map)
432 if (!--map->refcount)
433 list_del_rcu(&map->list);
436 static void acpi_os_map_cleanup(struct acpi_ioremap *map)
438 if (!map->refcount) {
439 synchronize_rcu_expedited();
440 acpi_unmap(map->phys, map->virt);
445 void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size)
447 struct acpi_ioremap *map;
449 if (!acpi_gbl_permanent_mmap) {
450 __acpi_unmap_table(virt, size);
454 mutex_lock(&acpi_ioremap_lock);
455 map = acpi_map_lookup_virt(virt, size);
457 mutex_unlock(&acpi_ioremap_lock);
458 WARN(true, PREFIX "%s: bad address %p\n", __func__, virt);
461 acpi_os_drop_map_ref(map);
462 mutex_unlock(&acpi_ioremap_lock);
464 acpi_os_map_cleanup(map);
466 EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem);
468 void __ref acpi_os_unmap_memory(void *virt, acpi_size size)
470 return acpi_os_unmap_iomem((void __iomem *)virt, size);
472 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
474 void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
476 if (!acpi_gbl_permanent_mmap)
477 __acpi_unmap_table(virt, size);
480 int acpi_os_map_generic_address(struct acpi_generic_address *gas)
485 if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
488 /* Handle possible alignment issues */
489 memcpy(&addr, &gas->address, sizeof(addr));
490 if (!addr || !gas->bit_width)
493 virt = acpi_os_map_iomem(addr, gas->bit_width / 8);
499 EXPORT_SYMBOL(acpi_os_map_generic_address);
501 void acpi_os_unmap_generic_address(struct acpi_generic_address *gas)
504 struct acpi_ioremap *map;
506 if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
509 /* Handle possible alignment issues */
510 memcpy(&addr, &gas->address, sizeof(addr));
511 if (!addr || !gas->bit_width)
514 mutex_lock(&acpi_ioremap_lock);
515 map = acpi_map_lookup(addr, gas->bit_width / 8);
517 mutex_unlock(&acpi_ioremap_lock);
520 acpi_os_drop_map_ref(map);
521 mutex_unlock(&acpi_ioremap_lock);
523 acpi_os_map_cleanup(map);
525 EXPORT_SYMBOL(acpi_os_unmap_generic_address);
527 #ifdef ACPI_FUTURE_USAGE
529 acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)
532 return AE_BAD_PARAMETER;
534 *phys = virt_to_phys(virt);
540 #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
541 static bool acpi_rev_override;
543 int __init acpi_rev_override_setup(char *str)
545 acpi_rev_override = true;
548 __setup("acpi_rev_override", acpi_rev_override_setup);
550 #define acpi_rev_override false
553 #define ACPI_MAX_OVERRIDE_LEN 100
555 static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
558 acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
561 if (!init_val || !new_val)
562 return AE_BAD_PARAMETER;
565 if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {
566 printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n",
568 *new_val = acpi_os_name;
571 if (!memcmp(init_val->name, "_REV", 4) && acpi_rev_override) {
572 printk(KERN_INFO PREFIX "Overriding _REV return value to 5\n");
573 *new_val = (char *)5;
579 #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
580 #include <linux/earlycpio.h>
581 #include <linux/memblock.h>
583 static u64 acpi_tables_addr;
584 static int all_tables_size;
586 /* Copied from acpica/tbutils.c:acpi_tb_checksum() */
587 static u8 __init acpi_table_checksum(u8 *buffer, u32 length)
590 u8 *end = buffer + length;
593 sum = (u8) (sum + *(buffer++));
597 /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */
598 static const char * const table_sigs[] = {
599 ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ,
600 ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT,
601 ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF,
602 ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET,
603 ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI,
604 ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA,
605 ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT,
606 ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT,
607 ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL };
609 #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
611 #define ACPI_OVERRIDE_TABLES 64
612 static struct cpio_data __initdata acpi_initrd_files[ACPI_OVERRIDE_TABLES];
614 #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT)
616 void __init acpi_initrd_override(void *data, size_t size)
618 int sig, no, table_nr = 0, total_offset = 0;
620 struct acpi_table_header *table;
621 char cpio_path[32] = "kernel/firmware/acpi/";
622 struct cpio_data file;
624 if (data == NULL || size == 0)
627 for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) {
628 file = find_cpio_data(cpio_path, data, size, &offset);
635 if (file.size < sizeof(struct acpi_table_header)) {
636 pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n",
637 cpio_path, file.name);
643 for (sig = 0; table_sigs[sig]; sig++)
644 if (!memcmp(table->signature, table_sigs[sig], 4))
647 if (!table_sigs[sig]) {
648 pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n",
649 cpio_path, file.name);
652 if (file.size != table->length) {
653 pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n",
654 cpio_path, file.name);
657 if (acpi_table_checksum(file.data, table->length)) {
658 pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n",
659 cpio_path, file.name);
663 pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n",
664 table->signature, cpio_path, file.name, table->length);
666 all_tables_size += table->length;
667 acpi_initrd_files[table_nr].data = file.data;
668 acpi_initrd_files[table_nr].size = file.size;
675 memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT,
676 all_tables_size, PAGE_SIZE);
677 if (!acpi_tables_addr) {
682 * Only calling e820_add_reserve does not work and the
683 * tables are invalid (memory got used) later.
684 * memblock_reserve works as expected and the tables won't get modified.
685 * But it's not enough on X86 because ioremap will
686 * complain later (used by acpi_os_map_memory) that the pages
687 * that should get mapped are not marked "reserved".
688 * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area)
691 memblock_reserve(acpi_tables_addr, all_tables_size);
692 arch_reserve_mem_area(acpi_tables_addr, all_tables_size);
695 * early_ioremap only can remap 256k one time. If we map all
696 * tables one time, we will hit the limit. Need to map chunks
697 * one by one during copying the same as that in relocate_initrd().
699 for (no = 0; no < table_nr; no++) {
700 unsigned char *src_p = acpi_initrd_files[no].data;
701 phys_addr_t size = acpi_initrd_files[no].size;
702 phys_addr_t dest_addr = acpi_tables_addr + total_offset;
703 phys_addr_t slop, clen;
706 total_offset += size;
709 slop = dest_addr & ~PAGE_MASK;
711 if (clen > MAP_CHUNK_SIZE - slop)
712 clen = MAP_CHUNK_SIZE - slop;
713 dest_p = early_ioremap(dest_addr & PAGE_MASK,
715 memcpy(dest_p + slop, src_p, clen);
716 early_iounmap(dest_p, clen + slop);
723 #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */
725 static void acpi_table_taint(struct acpi_table_header *table)
728 "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n",
729 table->signature, table->oem_table_id);
730 add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE);
735 acpi_os_table_override(struct acpi_table_header * existing_table,
736 struct acpi_table_header ** new_table)
738 if (!existing_table || !new_table)
739 return AE_BAD_PARAMETER;
743 #ifdef CONFIG_ACPI_CUSTOM_DSDT
744 if (strncmp(existing_table->signature, "DSDT", 4) == 0)
745 *new_table = (struct acpi_table_header *)AmlCode;
747 if (*new_table != NULL)
748 acpi_table_taint(existing_table);
753 acpi_os_physical_table_override(struct acpi_table_header *existing_table,
754 acpi_physical_address *address,
757 #ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
762 int table_offset = 0;
763 struct acpi_table_header *table;
768 if (!acpi_tables_addr)
772 if (table_offset + ACPI_HEADER_SIZE > all_tables_size) {
777 table = acpi_os_map_memory(acpi_tables_addr + table_offset,
780 if (table_offset + table->length > all_tables_size) {
781 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
786 table_offset += table->length;
788 if (memcmp(existing_table->signature, table->signature, 4)) {
789 acpi_os_unmap_memory(table,
794 /* Only override tables with matching oem id */
795 if (memcmp(table->oem_table_id, existing_table->oem_table_id,
796 ACPI_OEM_TABLE_ID_SIZE)) {
797 acpi_os_unmap_memory(table,
802 table_offset -= table->length;
803 *table_length = table->length;
804 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
805 *address = acpi_tables_addr + table_offset;
807 } while (table_offset + ACPI_HEADER_SIZE < all_tables_size);
810 acpi_table_taint(existing_table);
815 static irqreturn_t acpi_irq(int irq, void *dev_id)
819 handled = (*acpi_irq_handler) (acpi_irq_context);
825 acpi_irq_not_handled++;
831 acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
836 acpi_irq_stats_init();
839 * ACPI interrupts different from the SCI in our copy of the FADT are
842 if (gsi != acpi_gbl_FADT.sci_interrupt)
843 return AE_BAD_PARAMETER;
845 if (acpi_irq_handler)
846 return AE_ALREADY_ACQUIRED;
848 if (acpi_gsi_to_irq(gsi, &irq) < 0) {
849 printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n",
854 acpi_irq_handler = handler;
855 acpi_irq_context = context;
856 if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
857 printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq);
858 acpi_irq_handler = NULL;
859 return AE_NOT_ACQUIRED;
865 acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler)
867 if (irq != acpi_gbl_FADT.sci_interrupt)
868 return AE_BAD_PARAMETER;
870 free_irq(irq, acpi_irq);
871 acpi_irq_handler = NULL;
877 * Running in interpreter thread context, safe to sleep
880 void acpi_os_sleep(u64 ms)
885 void acpi_os_stall(u32 us)
893 touch_nmi_watchdog();
899 * Support ACPI 3.0 AML Timer operand
900 * Returns 64-bit free-running, monotonically increasing timer
901 * with 100ns granularity
903 u64 acpi_os_get_timer(void)
905 u64 time_ns = ktime_to_ns(ktime_get());
906 do_div(time_ns, 100);
910 acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
919 *(u8 *) value = inb(port);
920 } else if (width <= 16) {
921 *(u16 *) value = inw(port);
922 } else if (width <= 32) {
923 *(u32 *) value = inl(port);
931 EXPORT_SYMBOL(acpi_os_read_port);
933 acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
937 } else if (width <= 16) {
939 } else if (width <= 32) {
948 EXPORT_SYMBOL(acpi_os_write_port);
951 static inline u64 read64(const volatile void __iomem *addr)
956 static inline u64 read64(const volatile void __iomem *addr)
961 return l | (h << 32);
966 acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width)
968 void __iomem *virt_addr;
969 unsigned int size = width / 8;
974 virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
977 virt_addr = acpi_os_ioremap(phys_addr, size);
979 return AE_BAD_ADDRESS;
988 *(u8 *) value = readb(virt_addr);
991 *(u16 *) value = readw(virt_addr);
994 *(u32 *) value = readl(virt_addr);
997 *(u64 *) value = read64(virt_addr);
1012 static inline void write64(u64 val, volatile void __iomem *addr)
1017 static inline void write64(u64 val, volatile void __iomem *addr)
1020 writel(val>>32, addr+4);
1025 acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width)
1027 void __iomem *virt_addr;
1028 unsigned int size = width / 8;
1032 virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
1035 virt_addr = acpi_os_ioremap(phys_addr, size);
1037 return AE_BAD_ADDRESS;
1043 writeb(value, virt_addr);
1046 writew(value, virt_addr);
1049 writel(value, virt_addr);
1052 write64(value, virt_addr);
1067 acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
1068 u64 *value, u32 width)
1074 return AE_BAD_PARAMETER;
1090 result = raw_pci_read(pci_id->segment, pci_id->bus,
1091 PCI_DEVFN(pci_id->device, pci_id->function),
1092 reg, size, &value32);
1095 return (result ? AE_ERROR : AE_OK);
1099 acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
1100 u64 value, u32 width)
1118 result = raw_pci_write(pci_id->segment, pci_id->bus,
1119 PCI_DEVFN(pci_id->device, pci_id->function),
1122 return (result ? AE_ERROR : AE_OK);
1125 static void acpi_os_execute_deferred(struct work_struct *work)
1127 struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
1129 dpc->function(dpc->context);
1133 /*******************************************************************************
1135 * FUNCTION: acpi_os_execute
1137 * PARAMETERS: Type - Type of the callback
1138 * Function - Function to be executed
1139 * Context - Function parameters
1143 * DESCRIPTION: Depending on type, either queues function for deferred execution or
1144 * immediately executes function on a separate thread.
1146 ******************************************************************************/
1148 acpi_status acpi_os_execute(acpi_execute_type type,
1149 acpi_osd_exec_callback function, void *context)
1151 acpi_status status = AE_OK;
1152 struct acpi_os_dpc *dpc;
1153 struct workqueue_struct *queue;
1155 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
1156 "Scheduling function [%p(%p)] for deferred execution.\n",
1157 function, context));
1160 * Allocate/initialize DPC structure. Note that this memory will be
1161 * freed by the callee. The kernel handles the work_struct list in a
1162 * way that allows us to also free its memory inside the callee.
1163 * Because we may want to schedule several tasks with different
1164 * parameters we can't use the approach some kernel code uses of
1165 * having a static work_struct.
1168 dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
1170 return AE_NO_MEMORY;
1172 dpc->function = function;
1173 dpc->context = context;
1176 * To prevent lockdep from complaining unnecessarily, make sure that
1177 * there is a different static lockdep key for each workqueue by using
1178 * INIT_WORK() for each of them separately.
1180 if (type == OSL_NOTIFY_HANDLER) {
1181 queue = kacpi_notify_wq;
1182 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
1185 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
1189 * On some machines, a software-initiated SMI causes corruption unless
1190 * the SMI runs on CPU 0. An SMI can be initiated by any AML, but
1191 * typically it's done in GPE-related methods that are run via
1192 * workqueues, so we can avoid the known corruption cases by always
1193 * queueing on CPU 0.
1195 ret = queue_work_on(0, queue, &dpc->work);
1198 printk(KERN_ERR PREFIX
1199 "Call to queue_work() failed.\n");
1205 EXPORT_SYMBOL(acpi_os_execute);
1207 void acpi_os_wait_events_complete(void)
1210 * Make sure the GPE handler or the fixed event handler is not used
1211 * on another CPU after removal.
1213 if (acpi_irq_handler)
1214 synchronize_hardirq(acpi_gbl_FADT.sci_interrupt);
1215 flush_workqueue(kacpid_wq);
1216 flush_workqueue(kacpi_notify_wq);
1219 struct acpi_hp_work {
1220 struct work_struct work;
1221 struct acpi_device *adev;
1225 static void acpi_hotplug_work_fn(struct work_struct *work)
1227 struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work);
1229 acpi_os_wait_events_complete();
1230 acpi_device_hotplug(hpw->adev, hpw->src);
1234 acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src)
1236 struct acpi_hp_work *hpw;
1238 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
1239 "Scheduling hotplug event (%p, %u) for deferred execution.\n",
1242 hpw = kmalloc(sizeof(*hpw), GFP_KERNEL);
1244 return AE_NO_MEMORY;
1246 INIT_WORK(&hpw->work, acpi_hotplug_work_fn);
1250 * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because
1251 * the hotplug code may call driver .remove() functions, which may
1252 * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush
1255 if (!queue_work(kacpi_hotplug_wq, &hpw->work)) {
1262 bool acpi_queue_hotplug_work(struct work_struct *work)
1264 return queue_work(kacpi_hotplug_wq, work);
1268 acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
1270 struct semaphore *sem = NULL;
1272 sem = acpi_os_allocate_zeroed(sizeof(struct semaphore));
1274 return AE_NO_MEMORY;
1276 sema_init(sem, initial_units);
1278 *handle = (acpi_handle *) sem;
1280 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n",
1281 *handle, initial_units));
1287 * TODO: A better way to delete semaphores? Linux doesn't have a
1288 * 'delete_semaphore()' function -- may result in an invalid
1289 * pointer dereference for non-synchronized consumers. Should
1290 * we at least check for blocked threads and signal/cancel them?
1293 acpi_status acpi_os_delete_semaphore(acpi_handle handle)
1295 struct semaphore *sem = (struct semaphore *)handle;
1298 return AE_BAD_PARAMETER;
1300 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle));
1302 BUG_ON(!list_empty(&sem->wait_list));
1310 * TODO: Support for units > 1?
1312 acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
1314 acpi_status status = AE_OK;
1315 struct semaphore *sem = (struct semaphore *)handle;
1319 if (!sem || (units < 1))
1320 return AE_BAD_PARAMETER;
1325 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
1326 handle, units, timeout));
1328 if (timeout == ACPI_WAIT_FOREVER)
1329 jiffies = MAX_SCHEDULE_TIMEOUT;
1331 jiffies = msecs_to_jiffies(timeout);
1333 ret = down_timeout(sem, jiffies);
1337 if (ACPI_FAILURE(status)) {
1338 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
1339 "Failed to acquire semaphore[%p|%d|%d], %s",
1340 handle, units, timeout,
1341 acpi_format_exception(status)));
1343 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
1344 "Acquired semaphore[%p|%d|%d]", handle,
1352 * TODO: Support for units > 1?
1354 acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
1356 struct semaphore *sem = (struct semaphore *)handle;
1358 if (!sem || (units < 1))
1359 return AE_BAD_PARAMETER;
1364 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle,
1372 #ifdef ACPI_FUTURE_USAGE
1373 u32 acpi_os_get_line(char *buffer)
1376 #ifdef ENABLE_DEBUGGER
1377 if (acpi_in_debugger) {
1380 kdb_read(buffer, sizeof(line_buf));
1382 /* remove the CR kdb includes */
1383 chars = strlen(buffer) - 1;
1384 buffer[chars] = '\0';
1390 #endif /* ACPI_FUTURE_USAGE */
1392 acpi_status acpi_os_signal(u32 function, void *info)
1395 case ACPI_SIGNAL_FATAL:
1396 printk(KERN_ERR PREFIX "Fatal opcode executed\n");
1398 case ACPI_SIGNAL_BREAKPOINT:
1401 * ACPI spec. says to treat it as a NOP unless
1402 * you are debugging. So if/when we integrate
1403 * AML debugger into the kernel debugger its
1404 * hook will go here. But until then it is
1405 * not useful to print anything on breakpoints.
1415 static int __init acpi_os_name_setup(char *str)
1417 char *p = acpi_os_name;
1418 int count = ACPI_MAX_OVERRIDE_LEN - 1;
1423 for (; count-- && *str; str++) {
1424 if (isalnum(*str) || *str == ' ' || *str == ':')
1426 else if (*str == '\'' || *str == '"')
1437 __setup("acpi_os_name=", acpi_os_name_setup);
1439 #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
1440 #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */
1442 struct osi_setup_entry {
1443 char string[OSI_STRING_LENGTH_MAX];
1447 static struct osi_setup_entry
1448 osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = {
1449 {"Module Device", true},
1450 {"Processor Device", true},
1451 {"3.0 _SCP Extensions", true},
1452 {"Processor Aggregator Device", true},
1455 void __init acpi_osi_setup(char *str)
1457 struct osi_setup_entry *osi;
1461 if (!acpi_gbl_create_osi_method)
1464 if (str == NULL || *str == '\0') {
1465 printk(KERN_INFO PREFIX "_OSI method disabled\n");
1466 acpi_gbl_create_osi_method = FALSE;
1473 osi_linux.default_disabling = 1;
1475 } else if (*str == '*') {
1476 acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS);
1477 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1478 osi = &osi_setup_entries[i];
1479 osi->enable = false;
1486 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1487 osi = &osi_setup_entries[i];
1488 if (!strcmp(osi->string, str)) {
1489 osi->enable = enable;
1491 } else if (osi->string[0] == '\0') {
1492 osi->enable = enable;
1493 strncpy(osi->string, str, OSI_STRING_LENGTH_MAX);
1499 static void __init set_osi_linux(unsigned int enable)
1501 if (osi_linux.enable != enable)
1502 osi_linux.enable = enable;
1504 if (osi_linux.enable)
1505 acpi_osi_setup("Linux");
1507 acpi_osi_setup("!Linux");
1512 static void __init acpi_cmdline_osi_linux(unsigned int enable)
1514 osi_linux.cmdline = 1; /* cmdline set the default and override DMI */
1516 set_osi_linux(enable);
1521 void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d)
1523 printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
1528 osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */
1529 set_osi_linux(enable);
1535 * Modify the list of "OS Interfaces" reported to BIOS via _OSI
1537 * empty string disables _OSI
1538 * string starting with '!' disables that string
1539 * otherwise string is added to list, augmenting built-in strings
1541 static void __init acpi_osi_setup_late(void)
1543 struct osi_setup_entry *osi;
1548 if (osi_linux.default_disabling) {
1549 status = acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS);
1551 if (ACPI_SUCCESS(status))
1552 printk(KERN_INFO PREFIX "Disabled all _OSI OS vendors\n");
1555 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1556 osi = &osi_setup_entries[i];
1562 status = acpi_install_interface(str);
1564 if (ACPI_SUCCESS(status))
1565 printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
1567 status = acpi_remove_interface(str);
1569 if (ACPI_SUCCESS(status))
1570 printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
1575 static int __init osi_setup(char *str)
1577 if (str && !strcmp("Linux", str))
1578 acpi_cmdline_osi_linux(1);
1579 else if (str && !strcmp("!Linux", str))
1580 acpi_cmdline_osi_linux(0);
1582 acpi_osi_setup(str);
1587 __setup("acpi_osi=", osi_setup);
1590 * Disable the auto-serialization of named objects creation methods.
1592 * This feature is enabled by default. It marks the AML control methods
1593 * that contain the opcodes to create named objects as "Serialized".
1595 static int __init acpi_no_auto_serialize_setup(char *str)
1597 acpi_gbl_auto_serialize_methods = FALSE;
1598 pr_info("ACPI: auto-serialization disabled\n");
1603 __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup);
1605 /* Check of resource interference between native drivers and ACPI
1606 * OperationRegions (SystemIO and System Memory only).
1607 * IO ports and memory declared in ACPI might be used by the ACPI subsystem
1608 * in arbitrary AML code and can interfere with legacy drivers.
1609 * acpi_enforce_resources= can be set to:
1611 * - strict (default) (2)
1612 * -> further driver trying to access the resources will not load
1614 * -> further driver trying to access the resources will load, but you
1615 * get a system message that something might go wrong...
1618 * -> ACPI Operation Region resources will not be registered
1621 #define ENFORCE_RESOURCES_STRICT 2
1622 #define ENFORCE_RESOURCES_LAX 1
1623 #define ENFORCE_RESOURCES_NO 0
1625 static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1627 static int __init acpi_enforce_resources_setup(char *str)
1629 if (str == NULL || *str == '\0')
1632 if (!strcmp("strict", str))
1633 acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1634 else if (!strcmp("lax", str))
1635 acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
1636 else if (!strcmp("no", str))
1637 acpi_enforce_resources = ENFORCE_RESOURCES_NO;
1642 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup);
1644 /* Check for resource conflicts between ACPI OperationRegions and native
1646 int acpi_check_resource_conflict(const struct resource *res)
1648 acpi_adr_space_type space_id;
1653 if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
1655 if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM))
1658 if (res->flags & IORESOURCE_IO)
1659 space_id = ACPI_ADR_SPACE_SYSTEM_IO;
1661 space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY;
1663 length = resource_size(res);
1664 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO)
1666 clash = acpi_check_address_range(space_id, res->start, length, warn);
1669 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) {
1670 if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX)
1671 printk(KERN_NOTICE "ACPI: This conflict may"
1672 " cause random problems and system"
1674 printk(KERN_INFO "ACPI: If an ACPI driver is available"
1675 " for this device, you should use it instead of"
1676 " the native driver\n");
1678 if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
1683 EXPORT_SYMBOL(acpi_check_resource_conflict);
1685 int acpi_check_region(resource_size_t start, resource_size_t n,
1688 struct resource res = {
1690 .end = start + n - 1,
1692 .flags = IORESOURCE_IO,
1695 return acpi_check_resource_conflict(&res);
1697 EXPORT_SYMBOL(acpi_check_region);
1700 * Let drivers know whether the resource checks are effective
1702 int acpi_resources_are_enforced(void)
1704 return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT;
1706 EXPORT_SYMBOL(acpi_resources_are_enforced);
1708 bool acpi_osi_is_win8(void)
1710 return acpi_gbl_osi_data >= ACPI_OSI_WIN_8;
1712 EXPORT_SYMBOL(acpi_osi_is_win8);
1715 * Deallocate the memory for a spinlock.
1717 void acpi_os_delete_lock(acpi_spinlock handle)
1723 * Acquire a spinlock.
1725 * handle is a pointer to the spinlock_t.
1728 acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
1730 acpi_cpu_flags flags;
1731 spin_lock_irqsave(lockp, flags);
1736 * Release a spinlock. See above.
1739 void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)
1741 spin_unlock_irqrestore(lockp, flags);
1744 #ifndef ACPI_USE_LOCAL_CACHE
1746 /*******************************************************************************
1748 * FUNCTION: acpi_os_create_cache
1750 * PARAMETERS: name - Ascii name for the cache
1751 * size - Size of each cached object
1752 * depth - Maximum depth of the cache (in objects) <ignored>
1753 * cache - Where the new cache object is returned
1757 * DESCRIPTION: Create a cache object
1759 ******************************************************************************/
1762 acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
1764 *cache = kmem_cache_create(name, size, 0, 0, NULL);
1771 /*******************************************************************************
1773 * FUNCTION: acpi_os_purge_cache
1775 * PARAMETERS: Cache - Handle to cache object
1779 * DESCRIPTION: Free all objects within the requested cache.
1781 ******************************************************************************/
1783 acpi_status acpi_os_purge_cache(acpi_cache_t * cache)
1785 kmem_cache_shrink(cache);
1789 /*******************************************************************************
1791 * FUNCTION: acpi_os_delete_cache
1793 * PARAMETERS: Cache - Handle to cache object
1797 * DESCRIPTION: Free all objects within the requested cache and delete the
1800 ******************************************************************************/
1802 acpi_status acpi_os_delete_cache(acpi_cache_t * cache)
1804 kmem_cache_destroy(cache);
1808 /*******************************************************************************
1810 * FUNCTION: acpi_os_release_object
1812 * PARAMETERS: Cache - Handle to cache object
1813 * Object - The object to be released
1817 * DESCRIPTION: Release an object to the specified cache. If cache is full,
1818 * the object is deleted.
1820 ******************************************************************************/
1822 acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
1824 kmem_cache_free(cache, object);
1829 static int __init acpi_no_static_ssdt_setup(char *s)
1831 acpi_gbl_disable_ssdt_table_install = TRUE;
1832 pr_info("ACPI: static SSDT installation disabled\n");
1837 early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup);
1839 static int __init acpi_disable_return_repair(char *s)
1841 printk(KERN_NOTICE PREFIX
1842 "ACPI: Predefined validation mechanism disabled\n");
1843 acpi_gbl_disable_auto_repair = TRUE;
1848 __setup("acpica_no_return_repair", acpi_disable_return_repair);
1850 acpi_status __init acpi_os_initialize(void)
1852 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
1853 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
1854 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block);
1855 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block);
1856 if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) {
1858 * Use acpi_os_map_generic_address to pre-map the reset
1859 * register if it's in system memory.
1863 rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register);
1864 pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv);
1870 acpi_status __init acpi_os_initialize1(void)
1872 kacpid_wq = alloc_workqueue("kacpid", 0, 1);
1873 kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1);
1874 kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0);
1876 BUG_ON(!kacpi_notify_wq);
1877 BUG_ON(!kacpi_hotplug_wq);
1878 acpi_install_interface_handler(acpi_osi_handler);
1879 acpi_osi_setup_late();
1883 acpi_status acpi_os_terminate(void)
1885 if (acpi_irq_handler) {
1886 acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt,
1890 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block);
1891 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block);
1892 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
1893 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
1894 if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER)
1895 acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register);
1897 destroy_workqueue(kacpid_wq);
1898 destroy_workqueue(kacpi_notify_wq);
1899 destroy_workqueue(kacpi_hotplug_wq);
1904 acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control,
1908 if (__acpi_os_prepare_sleep)
1909 rc = __acpi_os_prepare_sleep(sleep_state,
1910 pm1a_control, pm1b_control);
1914 return AE_CTRL_SKIP;
1919 void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state,
1920 u32 pm1a_ctrl, u32 pm1b_ctrl))
1922 __acpi_os_prepare_sleep = func;
1925 acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a,
1929 if (__acpi_os_prepare_extended_sleep)
1930 rc = __acpi_os_prepare_extended_sleep(sleep_state,
1935 return AE_CTRL_SKIP;
1940 void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state,
1941 u32 val_a, u32 val_b))
1943 __acpi_os_prepare_extended_sleep = func;