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 #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
534 static bool acpi_rev_override;
536 int __init acpi_rev_override_setup(char *str)
538 acpi_rev_override = true;
541 __setup("acpi_rev_override", acpi_rev_override_setup);
543 #define acpi_rev_override false
546 #define ACPI_MAX_OVERRIDE_LEN 100
548 static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
551 acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
554 if (!init_val || !new_val)
555 return AE_BAD_PARAMETER;
558 if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {
559 printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n",
561 *new_val = acpi_os_name;
564 if (!memcmp(init_val->name, "_REV", 4) && acpi_rev_override) {
565 printk(KERN_INFO PREFIX "Overriding _REV return value to 5\n");
566 *new_val = (char *)5;
572 #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
573 #include <linux/earlycpio.h>
574 #include <linux/memblock.h>
576 static u64 acpi_tables_addr;
577 static int all_tables_size;
579 /* Copied from acpica/tbutils.c:acpi_tb_checksum() */
580 static u8 __init acpi_table_checksum(u8 *buffer, u32 length)
583 u8 *end = buffer + length;
586 sum = (u8) (sum + *(buffer++));
590 /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */
591 static const char * const table_sigs[] = {
592 ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ,
593 ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT,
594 ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF,
595 ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET,
596 ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI,
597 ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA,
598 ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT,
599 ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT,
600 ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL };
602 #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
604 #define ACPI_OVERRIDE_TABLES 64
605 static struct cpio_data __initdata acpi_initrd_files[ACPI_OVERRIDE_TABLES];
607 #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT)
609 void __init acpi_initrd_override(void *data, size_t size)
611 int sig, no, table_nr = 0, total_offset = 0;
613 struct acpi_table_header *table;
614 char cpio_path[32] = "kernel/firmware/acpi/";
615 struct cpio_data file;
617 if (data == NULL || size == 0)
620 for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) {
621 file = find_cpio_data(cpio_path, data, size, &offset);
628 if (file.size < sizeof(struct acpi_table_header)) {
629 pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n",
630 cpio_path, file.name);
636 for (sig = 0; table_sigs[sig]; sig++)
637 if (!memcmp(table->signature, table_sigs[sig], 4))
640 if (!table_sigs[sig]) {
641 pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n",
642 cpio_path, file.name);
645 if (file.size != table->length) {
646 pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n",
647 cpio_path, file.name);
650 if (acpi_table_checksum(file.data, table->length)) {
651 pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n",
652 cpio_path, file.name);
656 pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n",
657 table->signature, cpio_path, file.name, table->length);
659 all_tables_size += table->length;
660 acpi_initrd_files[table_nr].data = file.data;
661 acpi_initrd_files[table_nr].size = file.size;
668 memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT,
669 all_tables_size, PAGE_SIZE);
670 if (!acpi_tables_addr) {
675 * Only calling e820_add_reserve does not work and the
676 * tables are invalid (memory got used) later.
677 * memblock_reserve works as expected and the tables won't get modified.
678 * But it's not enough on X86 because ioremap will
679 * complain later (used by acpi_os_map_memory) that the pages
680 * that should get mapped are not marked "reserved".
681 * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area)
684 memblock_reserve(acpi_tables_addr, all_tables_size);
685 arch_reserve_mem_area(acpi_tables_addr, all_tables_size);
688 * early_ioremap only can remap 256k one time. If we map all
689 * tables one time, we will hit the limit. Need to map chunks
690 * one by one during copying the same as that in relocate_initrd().
692 for (no = 0; no < table_nr; no++) {
693 unsigned char *src_p = acpi_initrd_files[no].data;
694 phys_addr_t size = acpi_initrd_files[no].size;
695 phys_addr_t dest_addr = acpi_tables_addr + total_offset;
696 phys_addr_t slop, clen;
699 total_offset += size;
702 slop = dest_addr & ~PAGE_MASK;
704 if (clen > MAP_CHUNK_SIZE - slop)
705 clen = MAP_CHUNK_SIZE - slop;
706 dest_p = early_ioremap(dest_addr & PAGE_MASK,
708 memcpy(dest_p + slop, src_p, clen);
709 early_iounmap(dest_p, clen + slop);
716 #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */
718 static void acpi_table_taint(struct acpi_table_header *table)
721 "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n",
722 table->signature, table->oem_table_id);
723 add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE);
728 acpi_os_table_override(struct acpi_table_header * existing_table,
729 struct acpi_table_header ** new_table)
731 if (!existing_table || !new_table)
732 return AE_BAD_PARAMETER;
736 #ifdef CONFIG_ACPI_CUSTOM_DSDT
737 if (strncmp(existing_table->signature, "DSDT", 4) == 0)
738 *new_table = (struct acpi_table_header *)AmlCode;
740 if (*new_table != NULL)
741 acpi_table_taint(existing_table);
746 acpi_os_physical_table_override(struct acpi_table_header *existing_table,
747 acpi_physical_address *address,
750 #ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
755 int table_offset = 0;
756 struct acpi_table_header *table;
761 if (!acpi_tables_addr)
765 if (table_offset + ACPI_HEADER_SIZE > all_tables_size) {
770 table = acpi_os_map_memory(acpi_tables_addr + table_offset,
773 if (table_offset + table->length > all_tables_size) {
774 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
779 table_offset += table->length;
781 if (memcmp(existing_table->signature, table->signature, 4)) {
782 acpi_os_unmap_memory(table,
787 /* Only override tables with matching oem id */
788 if (memcmp(table->oem_table_id, existing_table->oem_table_id,
789 ACPI_OEM_TABLE_ID_SIZE)) {
790 acpi_os_unmap_memory(table,
795 table_offset -= table->length;
796 *table_length = table->length;
797 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
798 *address = acpi_tables_addr + table_offset;
800 } while (table_offset + ACPI_HEADER_SIZE < all_tables_size);
803 acpi_table_taint(existing_table);
808 static irqreturn_t acpi_irq(int irq, void *dev_id)
812 handled = (*acpi_irq_handler) (acpi_irq_context);
818 acpi_irq_not_handled++;
824 acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
829 acpi_irq_stats_init();
832 * ACPI interrupts different from the SCI in our copy of the FADT are
835 if (gsi != acpi_gbl_FADT.sci_interrupt)
836 return AE_BAD_PARAMETER;
838 if (acpi_irq_handler)
839 return AE_ALREADY_ACQUIRED;
841 if (acpi_gsi_to_irq(gsi, &irq) < 0) {
842 printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n",
847 acpi_irq_handler = handler;
848 acpi_irq_context = context;
849 if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
850 printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq);
851 acpi_irq_handler = NULL;
852 return AE_NOT_ACQUIRED;
858 acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler)
860 if (irq != acpi_gbl_FADT.sci_interrupt)
861 return AE_BAD_PARAMETER;
863 free_irq(irq, acpi_irq);
864 acpi_irq_handler = NULL;
870 * Running in interpreter thread context, safe to sleep
873 void acpi_os_sleep(u64 ms)
878 void acpi_os_stall(u32 us)
886 touch_nmi_watchdog();
892 * Support ACPI 3.0 AML Timer operand
893 * Returns 64-bit free-running, monotonically increasing timer
894 * with 100ns granularity
896 u64 acpi_os_get_timer(void)
898 u64 time_ns = ktime_to_ns(ktime_get());
899 do_div(time_ns, 100);
903 acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
912 *(u8 *) value = inb(port);
913 } else if (width <= 16) {
914 *(u16 *) value = inw(port);
915 } else if (width <= 32) {
916 *(u32 *) value = inl(port);
924 EXPORT_SYMBOL(acpi_os_read_port);
926 acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
930 } else if (width <= 16) {
932 } else if (width <= 32) {
941 EXPORT_SYMBOL(acpi_os_write_port);
944 static inline u64 read64(const volatile void __iomem *addr)
949 static inline u64 read64(const volatile void __iomem *addr)
954 return l | (h << 32);
959 acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width)
961 void __iomem *virt_addr;
962 unsigned int size = width / 8;
967 virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
970 virt_addr = acpi_os_ioremap(phys_addr, size);
972 return AE_BAD_ADDRESS;
981 *(u8 *) value = readb(virt_addr);
984 *(u16 *) value = readw(virt_addr);
987 *(u32 *) value = readl(virt_addr);
990 *(u64 *) value = read64(virt_addr);
1005 static inline void write64(u64 val, volatile void __iomem *addr)
1010 static inline void write64(u64 val, volatile void __iomem *addr)
1013 writel(val>>32, addr+4);
1018 acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width)
1020 void __iomem *virt_addr;
1021 unsigned int size = width / 8;
1025 virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
1028 virt_addr = acpi_os_ioremap(phys_addr, size);
1030 return AE_BAD_ADDRESS;
1036 writeb(value, virt_addr);
1039 writew(value, virt_addr);
1042 writel(value, virt_addr);
1045 write64(value, virt_addr);
1060 acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
1061 u64 *value, u32 width)
1067 return AE_BAD_PARAMETER;
1083 result = raw_pci_read(pci_id->segment, pci_id->bus,
1084 PCI_DEVFN(pci_id->device, pci_id->function),
1085 reg, size, &value32);
1088 return (result ? AE_ERROR : AE_OK);
1092 acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
1093 u64 value, u32 width)
1111 result = raw_pci_write(pci_id->segment, pci_id->bus,
1112 PCI_DEVFN(pci_id->device, pci_id->function),
1115 return (result ? AE_ERROR : AE_OK);
1118 static void acpi_os_execute_deferred(struct work_struct *work)
1120 struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
1122 dpc->function(dpc->context);
1126 /*******************************************************************************
1128 * FUNCTION: acpi_os_execute
1130 * PARAMETERS: Type - Type of the callback
1131 * Function - Function to be executed
1132 * Context - Function parameters
1136 * DESCRIPTION: Depending on type, either queues function for deferred execution or
1137 * immediately executes function on a separate thread.
1139 ******************************************************************************/
1141 acpi_status acpi_os_execute(acpi_execute_type type,
1142 acpi_osd_exec_callback function, void *context)
1144 acpi_status status = AE_OK;
1145 struct acpi_os_dpc *dpc;
1146 struct workqueue_struct *queue;
1148 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
1149 "Scheduling function [%p(%p)] for deferred execution.\n",
1150 function, context));
1153 * Allocate/initialize DPC structure. Note that this memory will be
1154 * freed by the callee. The kernel handles the work_struct list in a
1155 * way that allows us to also free its memory inside the callee.
1156 * Because we may want to schedule several tasks with different
1157 * parameters we can't use the approach some kernel code uses of
1158 * having a static work_struct.
1161 dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
1163 return AE_NO_MEMORY;
1165 dpc->function = function;
1166 dpc->context = context;
1169 * To prevent lockdep from complaining unnecessarily, make sure that
1170 * there is a different static lockdep key for each workqueue by using
1171 * INIT_WORK() for each of them separately.
1173 if (type == OSL_NOTIFY_HANDLER) {
1174 queue = kacpi_notify_wq;
1175 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
1178 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
1182 * On some machines, a software-initiated SMI causes corruption unless
1183 * the SMI runs on CPU 0. An SMI can be initiated by any AML, but
1184 * typically it's done in GPE-related methods that are run via
1185 * workqueues, so we can avoid the known corruption cases by always
1186 * queueing on CPU 0.
1188 ret = queue_work_on(0, queue, &dpc->work);
1191 printk(KERN_ERR PREFIX
1192 "Call to queue_work() failed.\n");
1198 EXPORT_SYMBOL(acpi_os_execute);
1200 void acpi_os_wait_events_complete(void)
1203 * Make sure the GPE handler or the fixed event handler is not used
1204 * on another CPU after removal.
1206 if (acpi_irq_handler)
1207 synchronize_hardirq(acpi_gbl_FADT.sci_interrupt);
1208 flush_workqueue(kacpid_wq);
1209 flush_workqueue(kacpi_notify_wq);
1212 struct acpi_hp_work {
1213 struct work_struct work;
1214 struct acpi_device *adev;
1218 static void acpi_hotplug_work_fn(struct work_struct *work)
1220 struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work);
1222 acpi_os_wait_events_complete();
1223 acpi_device_hotplug(hpw->adev, hpw->src);
1227 acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src)
1229 struct acpi_hp_work *hpw;
1231 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
1232 "Scheduling hotplug event (%p, %u) for deferred execution.\n",
1235 hpw = kmalloc(sizeof(*hpw), GFP_KERNEL);
1237 return AE_NO_MEMORY;
1239 INIT_WORK(&hpw->work, acpi_hotplug_work_fn);
1243 * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because
1244 * the hotplug code may call driver .remove() functions, which may
1245 * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush
1248 if (!queue_work(kacpi_hotplug_wq, &hpw->work)) {
1255 bool acpi_queue_hotplug_work(struct work_struct *work)
1257 return queue_work(kacpi_hotplug_wq, work);
1261 acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
1263 struct semaphore *sem = NULL;
1265 sem = acpi_os_allocate_zeroed(sizeof(struct semaphore));
1267 return AE_NO_MEMORY;
1269 sema_init(sem, initial_units);
1271 *handle = (acpi_handle *) sem;
1273 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n",
1274 *handle, initial_units));
1280 * TODO: A better way to delete semaphores? Linux doesn't have a
1281 * 'delete_semaphore()' function -- may result in an invalid
1282 * pointer dereference for non-synchronized consumers. Should
1283 * we at least check for blocked threads and signal/cancel them?
1286 acpi_status acpi_os_delete_semaphore(acpi_handle handle)
1288 struct semaphore *sem = (struct semaphore *)handle;
1291 return AE_BAD_PARAMETER;
1293 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle));
1295 BUG_ON(!list_empty(&sem->wait_list));
1303 * TODO: Support for units > 1?
1305 acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
1307 acpi_status status = AE_OK;
1308 struct semaphore *sem = (struct semaphore *)handle;
1312 if (!sem || (units < 1))
1313 return AE_BAD_PARAMETER;
1318 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
1319 handle, units, timeout));
1321 if (timeout == ACPI_WAIT_FOREVER)
1322 jiffies = MAX_SCHEDULE_TIMEOUT;
1324 jiffies = msecs_to_jiffies(timeout);
1326 ret = down_timeout(sem, jiffies);
1330 if (ACPI_FAILURE(status)) {
1331 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
1332 "Failed to acquire semaphore[%p|%d|%d], %s",
1333 handle, units, timeout,
1334 acpi_format_exception(status)));
1336 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
1337 "Acquired semaphore[%p|%d|%d]", handle,
1345 * TODO: Support for units > 1?
1347 acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
1349 struct semaphore *sem = (struct semaphore *)handle;
1351 if (!sem || (units < 1))
1352 return AE_BAD_PARAMETER;
1357 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle,
1365 #ifdef ACPI_FUTURE_USAGE
1366 u32 acpi_os_get_line(char *buffer)
1369 #ifdef ENABLE_DEBUGGER
1370 if (acpi_in_debugger) {
1373 kdb_read(buffer, sizeof(line_buf));
1375 /* remove the CR kdb includes */
1376 chars = strlen(buffer) - 1;
1377 buffer[chars] = '\0';
1383 #endif /* ACPI_FUTURE_USAGE */
1385 acpi_status acpi_os_signal(u32 function, void *info)
1388 case ACPI_SIGNAL_FATAL:
1389 printk(KERN_ERR PREFIX "Fatal opcode executed\n");
1391 case ACPI_SIGNAL_BREAKPOINT:
1394 * ACPI spec. says to treat it as a NOP unless
1395 * you are debugging. So if/when we integrate
1396 * AML debugger into the kernel debugger its
1397 * hook will go here. But until then it is
1398 * not useful to print anything on breakpoints.
1408 static int __init acpi_os_name_setup(char *str)
1410 char *p = acpi_os_name;
1411 int count = ACPI_MAX_OVERRIDE_LEN - 1;
1416 for (; count-- && *str; str++) {
1417 if (isalnum(*str) || *str == ' ' || *str == ':')
1419 else if (*str == '\'' || *str == '"')
1430 __setup("acpi_os_name=", acpi_os_name_setup);
1432 #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
1433 #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */
1435 struct osi_setup_entry {
1436 char string[OSI_STRING_LENGTH_MAX];
1440 static struct osi_setup_entry
1441 osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = {
1442 {"Module Device", true},
1443 {"Processor Device", true},
1444 {"3.0 _SCP Extensions", true},
1445 {"Processor Aggregator Device", true},
1448 void __init acpi_osi_setup(char *str)
1450 struct osi_setup_entry *osi;
1454 if (!acpi_gbl_create_osi_method)
1457 if (str == NULL || *str == '\0') {
1458 printk(KERN_INFO PREFIX "_OSI method disabled\n");
1459 acpi_gbl_create_osi_method = FALSE;
1466 osi_linux.default_disabling = 1;
1468 } else if (*str == '*') {
1469 acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS);
1470 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1471 osi = &osi_setup_entries[i];
1472 osi->enable = false;
1479 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1480 osi = &osi_setup_entries[i];
1481 if (!strcmp(osi->string, str)) {
1482 osi->enable = enable;
1484 } else if (osi->string[0] == '\0') {
1485 osi->enable = enable;
1486 strncpy(osi->string, str, OSI_STRING_LENGTH_MAX);
1492 static void __init set_osi_linux(unsigned int enable)
1494 if (osi_linux.enable != enable)
1495 osi_linux.enable = enable;
1497 if (osi_linux.enable)
1498 acpi_osi_setup("Linux");
1500 acpi_osi_setup("!Linux");
1505 static void __init acpi_cmdline_osi_linux(unsigned int enable)
1507 osi_linux.cmdline = 1; /* cmdline set the default and override DMI */
1509 set_osi_linux(enable);
1514 void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d)
1516 printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
1521 osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */
1522 set_osi_linux(enable);
1528 * Modify the list of "OS Interfaces" reported to BIOS via _OSI
1530 * empty string disables _OSI
1531 * string starting with '!' disables that string
1532 * otherwise string is added to list, augmenting built-in strings
1534 static void __init acpi_osi_setup_late(void)
1536 struct osi_setup_entry *osi;
1541 if (osi_linux.default_disabling) {
1542 status = acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS);
1544 if (ACPI_SUCCESS(status))
1545 printk(KERN_INFO PREFIX "Disabled all _OSI OS vendors\n");
1548 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1549 osi = &osi_setup_entries[i];
1555 status = acpi_install_interface(str);
1557 if (ACPI_SUCCESS(status))
1558 printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
1560 status = acpi_remove_interface(str);
1562 if (ACPI_SUCCESS(status))
1563 printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
1568 static int __init osi_setup(char *str)
1570 if (str && !strcmp("Linux", str))
1571 acpi_cmdline_osi_linux(1);
1572 else if (str && !strcmp("!Linux", str))
1573 acpi_cmdline_osi_linux(0);
1575 acpi_osi_setup(str);
1580 __setup("acpi_osi=", osi_setup);
1583 * Disable the auto-serialization of named objects creation methods.
1585 * This feature is enabled by default. It marks the AML control methods
1586 * that contain the opcodes to create named objects as "Serialized".
1588 static int __init acpi_no_auto_serialize_setup(char *str)
1590 acpi_gbl_auto_serialize_methods = FALSE;
1591 pr_info("ACPI: auto-serialization disabled\n");
1596 __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup);
1598 /* Check of resource interference between native drivers and ACPI
1599 * OperationRegions (SystemIO and System Memory only).
1600 * IO ports and memory declared in ACPI might be used by the ACPI subsystem
1601 * in arbitrary AML code and can interfere with legacy drivers.
1602 * acpi_enforce_resources= can be set to:
1604 * - strict (default) (2)
1605 * -> further driver trying to access the resources will not load
1607 * -> further driver trying to access the resources will load, but you
1608 * get a system message that something might go wrong...
1611 * -> ACPI Operation Region resources will not be registered
1614 #define ENFORCE_RESOURCES_STRICT 2
1615 #define ENFORCE_RESOURCES_LAX 1
1616 #define ENFORCE_RESOURCES_NO 0
1618 static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1620 static int __init acpi_enforce_resources_setup(char *str)
1622 if (str == NULL || *str == '\0')
1625 if (!strcmp("strict", str))
1626 acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1627 else if (!strcmp("lax", str))
1628 acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
1629 else if (!strcmp("no", str))
1630 acpi_enforce_resources = ENFORCE_RESOURCES_NO;
1635 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup);
1637 /* Check for resource conflicts between ACPI OperationRegions and native
1639 int acpi_check_resource_conflict(const struct resource *res)
1641 acpi_adr_space_type space_id;
1646 if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
1648 if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM))
1651 if (res->flags & IORESOURCE_IO)
1652 space_id = ACPI_ADR_SPACE_SYSTEM_IO;
1654 space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY;
1656 length = resource_size(res);
1657 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO)
1659 clash = acpi_check_address_range(space_id, res->start, length, warn);
1662 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) {
1663 if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX)
1664 printk(KERN_NOTICE "ACPI: This conflict may"
1665 " cause random problems and system"
1667 printk(KERN_INFO "ACPI: If an ACPI driver is available"
1668 " for this device, you should use it instead of"
1669 " the native driver\n");
1671 if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
1676 EXPORT_SYMBOL(acpi_check_resource_conflict);
1678 int acpi_check_region(resource_size_t start, resource_size_t n,
1681 struct resource res = {
1683 .end = start + n - 1,
1685 .flags = IORESOURCE_IO,
1688 return acpi_check_resource_conflict(&res);
1690 EXPORT_SYMBOL(acpi_check_region);
1693 * Let drivers know whether the resource checks are effective
1695 int acpi_resources_are_enforced(void)
1697 return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT;
1699 EXPORT_SYMBOL(acpi_resources_are_enforced);
1701 bool acpi_osi_is_win8(void)
1703 return acpi_gbl_osi_data >= ACPI_OSI_WIN_8;
1705 EXPORT_SYMBOL(acpi_osi_is_win8);
1708 * Deallocate the memory for a spinlock.
1710 void acpi_os_delete_lock(acpi_spinlock handle)
1716 * Acquire a spinlock.
1718 * handle is a pointer to the spinlock_t.
1721 acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
1723 acpi_cpu_flags flags;
1724 spin_lock_irqsave(lockp, flags);
1729 * Release a spinlock. See above.
1732 void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)
1734 spin_unlock_irqrestore(lockp, flags);
1737 #ifndef ACPI_USE_LOCAL_CACHE
1739 /*******************************************************************************
1741 * FUNCTION: acpi_os_create_cache
1743 * PARAMETERS: name - Ascii name for the cache
1744 * size - Size of each cached object
1745 * depth - Maximum depth of the cache (in objects) <ignored>
1746 * cache - Where the new cache object is returned
1750 * DESCRIPTION: Create a cache object
1752 ******************************************************************************/
1755 acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
1757 *cache = kmem_cache_create(name, size, 0, 0, NULL);
1764 /*******************************************************************************
1766 * FUNCTION: acpi_os_purge_cache
1768 * PARAMETERS: Cache - Handle to cache object
1772 * DESCRIPTION: Free all objects within the requested cache.
1774 ******************************************************************************/
1776 acpi_status acpi_os_purge_cache(acpi_cache_t * cache)
1778 kmem_cache_shrink(cache);
1782 /*******************************************************************************
1784 * FUNCTION: acpi_os_delete_cache
1786 * PARAMETERS: Cache - Handle to cache object
1790 * DESCRIPTION: Free all objects within the requested cache and delete the
1793 ******************************************************************************/
1795 acpi_status acpi_os_delete_cache(acpi_cache_t * cache)
1797 kmem_cache_destroy(cache);
1801 /*******************************************************************************
1803 * FUNCTION: acpi_os_release_object
1805 * PARAMETERS: Cache - Handle to cache object
1806 * Object - The object to be released
1810 * DESCRIPTION: Release an object to the specified cache. If cache is full,
1811 * the object is deleted.
1813 ******************************************************************************/
1815 acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
1817 kmem_cache_free(cache, object);
1822 static int __init acpi_no_static_ssdt_setup(char *s)
1824 acpi_gbl_disable_ssdt_table_install = TRUE;
1825 pr_info("ACPI: static SSDT installation disabled\n");
1830 early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup);
1832 static int __init acpi_disable_return_repair(char *s)
1834 printk(KERN_NOTICE PREFIX
1835 "ACPI: Predefined validation mechanism disabled\n");
1836 acpi_gbl_disable_auto_repair = TRUE;
1841 __setup("acpica_no_return_repair", acpi_disable_return_repair);
1843 acpi_status __init acpi_os_initialize(void)
1845 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
1846 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
1847 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block);
1848 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block);
1849 if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) {
1851 * Use acpi_os_map_generic_address to pre-map the reset
1852 * register if it's in system memory.
1856 rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register);
1857 pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv);
1863 acpi_status __init acpi_os_initialize1(void)
1865 acpi_reserve_resources();
1866 kacpid_wq = alloc_workqueue("kacpid", 0, 1);
1867 kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1);
1868 kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0);
1870 BUG_ON(!kacpi_notify_wq);
1871 BUG_ON(!kacpi_hotplug_wq);
1872 acpi_install_interface_handler(acpi_osi_handler);
1873 acpi_osi_setup_late();
1877 acpi_status acpi_os_terminate(void)
1879 if (acpi_irq_handler) {
1880 acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt,
1884 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block);
1885 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block);
1886 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
1887 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
1888 if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER)
1889 acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register);
1891 destroy_workqueue(kacpid_wq);
1892 destroy_workqueue(kacpi_notify_wq);
1893 destroy_workqueue(kacpi_hotplug_wq);
1898 acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control,
1902 if (__acpi_os_prepare_sleep)
1903 rc = __acpi_os_prepare_sleep(sleep_state,
1904 pm1a_control, pm1b_control);
1908 return AE_CTRL_SKIP;
1913 void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state,
1914 u32 pm1a_ctrl, u32 pm1b_ctrl))
1916 __acpi_os_prepare_sleep = func;
1919 acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a,
1923 if (__acpi_os_prepare_extended_sleep)
1924 rc = __acpi_os_prepare_extended_sleep(sleep_state,
1929 return AE_CTRL_SKIP;
1934 void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state,
1935 u32 val_a, u32 val_b))
1937 __acpi_os_prepare_extended_sleep = func;