RS485: fix inconsistencies in the meaning of some variables
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / acpi / osl.c
blobf31c5c5f1b7e083351e013649f1e1d73fdd74fa6
1 /*
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>
33 #include <linux/mm.h>
34 #include <linux/pci.h>
35 #include <linux/interrupt.h>
36 #include <linux/kmod.h>
37 #include <linux/delay.h>
38 #include <linux/workqueue.h>
39 #include <linux/nmi.h>
40 #include <linux/acpi.h>
41 #include <linux/acpi_io.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>
48 #include <asm/io.h>
49 #include <asm/uaccess.h>
51 #include <acpi/acpi.h>
52 #include <acpi/acpi_bus.h>
53 #include <acpi/processor.h>
55 #define _COMPONENT ACPI_OS_SERVICES
56 ACPI_MODULE_NAME("osl");
57 #define PREFIX "ACPI: "
58 struct acpi_os_dpc {
59 acpi_osd_exec_callback function;
60 void *context;
61 struct work_struct work;
62 int wait;
65 #ifdef CONFIG_ACPI_CUSTOM_DSDT
66 #include CONFIG_ACPI_CUSTOM_DSDT_FILE
67 #endif
69 #ifdef ENABLE_DEBUGGER
70 #include <linux/kdb.h>
72 /* stuff for debugger support */
73 int acpi_in_debugger;
74 EXPORT_SYMBOL(acpi_in_debugger);
76 extern char line_buf[80];
77 #endif /*ENABLE_DEBUGGER */
79 static acpi_osd_handler acpi_irq_handler;
80 static void *acpi_irq_context;
81 static struct workqueue_struct *kacpid_wq;
82 static struct workqueue_struct *kacpi_notify_wq;
83 struct workqueue_struct *kacpi_hotplug_wq;
84 EXPORT_SYMBOL(kacpi_hotplug_wq);
86 struct acpi_res_list {
87 resource_size_t start;
88 resource_size_t end;
89 acpi_adr_space_type resource_type; /* IO port, System memory, ...*/
90 char name[5]; /* only can have a length of 4 chars, make use of this
91 one instead of res->name, no need to kalloc then */
92 struct list_head resource_list;
93 int count;
96 static LIST_HEAD(resource_list_head);
97 static DEFINE_SPINLOCK(acpi_res_lock);
100 * This list of permanent mappings is for memory that may be accessed from
101 * interrupt context, where we can't do the ioremap().
103 struct acpi_ioremap {
104 struct list_head list;
105 void __iomem *virt;
106 acpi_physical_address phys;
107 acpi_size size;
108 unsigned long refcount;
111 static LIST_HEAD(acpi_ioremaps);
112 static DEFINE_MUTEX(acpi_ioremap_lock);
114 static void __init acpi_osi_setup_late(void);
117 * The story of _OSI(Linux)
119 * From pre-history through Linux-2.6.22,
120 * Linux responded TRUE upon a BIOS OSI(Linux) query.
122 * Unfortunately, reference BIOS writers got wind of this
123 * and put OSI(Linux) in their example code, quickly exposing
124 * this string as ill-conceived and opening the door to
125 * an un-bounded number of BIOS incompatibilities.
127 * For example, OSI(Linux) was used on resume to re-POST a
128 * video card on one system, because Linux at that time
129 * could not do a speedy restore in its native driver.
130 * But then upon gaining quick native restore capability,
131 * Linux has no way to tell the BIOS to skip the time-consuming
132 * POST -- putting Linux at a permanent performance disadvantage.
133 * On another system, the BIOS writer used OSI(Linux)
134 * to infer native OS support for IPMI! On other systems,
135 * OSI(Linux) simply got in the way of Linux claiming to
136 * be compatible with other operating systems, exposing
137 * BIOS issues such as skipped device initialization.
139 * So "Linux" turned out to be a really poor chose of
140 * OSI string, and from Linux-2.6.23 onward we respond FALSE.
142 * BIOS writers should NOT query _OSI(Linux) on future systems.
143 * Linux will complain on the console when it sees it, and return FALSE.
144 * To get Linux to return TRUE for your system will require
145 * a kernel source update to add a DMI entry,
146 * or boot with "acpi_osi=Linux"
149 static struct osi_linux {
150 unsigned int enable:1;
151 unsigned int dmi:1;
152 unsigned int cmdline:1;
153 } osi_linux = {0, 0, 0};
155 static u32 acpi_osi_handler(acpi_string interface, u32 supported)
157 if (!strcmp("Linux", interface)) {
159 printk_once(KERN_NOTICE FW_BUG PREFIX
160 "BIOS _OSI(Linux) query %s%s\n",
161 osi_linux.enable ? "honored" : "ignored",
162 osi_linux.cmdline ? " via cmdline" :
163 osi_linux.dmi ? " via DMI" : "");
166 return supported;
169 static void __init acpi_request_region (struct acpi_generic_address *addr,
170 unsigned int length, char *desc)
172 if (!addr->address || !length)
173 return;
175 /* Resources are never freed */
176 if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
177 request_region(addr->address, length, desc);
178 else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
179 request_mem_region(addr->address, length, desc);
182 static int __init acpi_reserve_resources(void)
184 acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length,
185 "ACPI PM1a_EVT_BLK");
187 acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length,
188 "ACPI PM1b_EVT_BLK");
190 acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length,
191 "ACPI PM1a_CNT_BLK");
193 acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length,
194 "ACPI PM1b_CNT_BLK");
196 if (acpi_gbl_FADT.pm_timer_length == 4)
197 acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR");
199 acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length,
200 "ACPI PM2_CNT_BLK");
202 /* Length of GPE blocks must be a non-negative multiple of 2 */
204 if (!(acpi_gbl_FADT.gpe0_block_length & 0x1))
205 acpi_request_region(&acpi_gbl_FADT.xgpe0_block,
206 acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK");
208 if (!(acpi_gbl_FADT.gpe1_block_length & 0x1))
209 acpi_request_region(&acpi_gbl_FADT.xgpe1_block,
210 acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK");
212 return 0;
214 device_initcall(acpi_reserve_resources);
216 void acpi_os_printf(const char *fmt, ...)
218 va_list args;
219 va_start(args, fmt);
220 acpi_os_vprintf(fmt, args);
221 va_end(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);
233 } else {
234 printk(KERN_CONT "%s", buffer);
236 #else
237 printk(KERN_CONT "%s", buffer);
238 #endif
241 #ifdef CONFIG_KEXEC
242 static unsigned long acpi_rsdp;
243 static int __init setup_acpi_rsdp(char *arg)
245 acpi_rsdp = simple_strtoul(arg, NULL, 16);
246 return 0;
248 early_param("acpi_rsdp", setup_acpi_rsdp);
249 #endif
251 acpi_physical_address __init acpi_os_get_root_pointer(void)
253 #ifdef CONFIG_KEXEC
254 if (acpi_rsdp)
255 return acpi_rsdp;
256 #endif
258 if (efi_enabled) {
259 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
260 return efi.acpi20;
261 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
262 return efi.acpi;
263 else {
264 printk(KERN_ERR PREFIX
265 "System description tables not found\n");
266 return 0;
268 } else {
269 acpi_physical_address pa = 0;
271 acpi_find_root_pointer(&pa);
272 return pa;
276 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
277 static struct acpi_ioremap *
278 acpi_map_lookup(acpi_physical_address phys, acpi_size size)
280 struct acpi_ioremap *map;
282 list_for_each_entry_rcu(map, &acpi_ioremaps, list)
283 if (map->phys <= phys &&
284 phys + size <= map->phys + map->size)
285 return map;
287 return NULL;
290 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
291 static void __iomem *
292 acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size)
294 struct acpi_ioremap *map;
296 map = acpi_map_lookup(phys, size);
297 if (map)
298 return map->virt + (phys - map->phys);
300 return NULL;
303 void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size)
305 struct acpi_ioremap *map;
306 void __iomem *virt = NULL;
308 mutex_lock(&acpi_ioremap_lock);
309 map = acpi_map_lookup(phys, size);
310 if (map) {
311 virt = map->virt + (phys - map->phys);
312 map->refcount++;
314 mutex_unlock(&acpi_ioremap_lock);
315 return virt;
317 EXPORT_SYMBOL_GPL(acpi_os_get_iomem);
319 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
320 static struct acpi_ioremap *
321 acpi_map_lookup_virt(void __iomem *virt, acpi_size size)
323 struct acpi_ioremap *map;
325 list_for_each_entry_rcu(map, &acpi_ioremaps, list)
326 if (map->virt <= virt &&
327 virt + size <= map->virt + map->size)
328 return map;
330 return NULL;
333 void __iomem *__init_refok
334 acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
336 struct acpi_ioremap *map;
337 void __iomem *virt;
338 acpi_physical_address pg_off;
339 acpi_size pg_sz;
341 if (phys > ULONG_MAX) {
342 printk(KERN_ERR PREFIX "Cannot map memory that high\n");
343 return NULL;
346 if (!acpi_gbl_permanent_mmap)
347 return __acpi_map_table((unsigned long)phys, size);
349 mutex_lock(&acpi_ioremap_lock);
350 /* Check if there's a suitable mapping already. */
351 map = acpi_map_lookup(phys, size);
352 if (map) {
353 map->refcount++;
354 goto out;
357 map = kzalloc(sizeof(*map), GFP_KERNEL);
358 if (!map) {
359 mutex_unlock(&acpi_ioremap_lock);
360 return NULL;
363 pg_off = round_down(phys, PAGE_SIZE);
364 pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off;
365 virt = acpi_os_ioremap(pg_off, pg_sz);
366 if (!virt) {
367 mutex_unlock(&acpi_ioremap_lock);
368 kfree(map);
369 return NULL;
372 INIT_LIST_HEAD(&map->list);
373 map->virt = virt;
374 map->phys = pg_off;
375 map->size = pg_sz;
376 map->refcount = 1;
378 list_add_tail_rcu(&map->list, &acpi_ioremaps);
380 out:
381 mutex_unlock(&acpi_ioremap_lock);
382 return map->virt + (phys - map->phys);
384 EXPORT_SYMBOL_GPL(acpi_os_map_memory);
386 static void acpi_os_drop_map_ref(struct acpi_ioremap *map)
388 if (!--map->refcount)
389 list_del_rcu(&map->list);
392 static void acpi_os_map_cleanup(struct acpi_ioremap *map)
394 if (!map->refcount) {
395 synchronize_rcu();
396 iounmap(map->virt);
397 kfree(map);
401 void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
403 struct acpi_ioremap *map;
405 if (!acpi_gbl_permanent_mmap) {
406 __acpi_unmap_table(virt, size);
407 return;
410 mutex_lock(&acpi_ioremap_lock);
411 map = acpi_map_lookup_virt(virt, size);
412 if (!map) {
413 mutex_unlock(&acpi_ioremap_lock);
414 WARN(true, PREFIX "%s: bad address %p\n", __func__, virt);
415 return;
417 acpi_os_drop_map_ref(map);
418 mutex_unlock(&acpi_ioremap_lock);
420 acpi_os_map_cleanup(map);
422 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
424 void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
426 if (!acpi_gbl_permanent_mmap)
427 __acpi_unmap_table(virt, size);
430 static int acpi_os_map_generic_address(struct acpi_generic_address *addr)
432 void __iomem *virt;
434 if (addr->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
435 return 0;
437 if (!addr->address || !addr->bit_width)
438 return -EINVAL;
440 virt = acpi_os_map_memory(addr->address, addr->bit_width / 8);
441 if (!virt)
442 return -EIO;
444 return 0;
447 static void acpi_os_unmap_generic_address(struct acpi_generic_address *addr)
449 struct acpi_ioremap *map;
451 if (addr->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
452 return;
454 if (!addr->address || !addr->bit_width)
455 return;
457 mutex_lock(&acpi_ioremap_lock);
458 map = acpi_map_lookup(addr->address, addr->bit_width / 8);
459 if (!map) {
460 mutex_unlock(&acpi_ioremap_lock);
461 return;
463 acpi_os_drop_map_ref(map);
464 mutex_unlock(&acpi_ioremap_lock);
466 acpi_os_map_cleanup(map);
469 #ifdef ACPI_FUTURE_USAGE
470 acpi_status
471 acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)
473 if (!phys || !virt)
474 return AE_BAD_PARAMETER;
476 *phys = virt_to_phys(virt);
478 return AE_OK;
480 #endif
482 #define ACPI_MAX_OVERRIDE_LEN 100
484 static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
486 acpi_status
487 acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
488 acpi_string * new_val)
490 if (!init_val || !new_val)
491 return AE_BAD_PARAMETER;
493 *new_val = NULL;
494 if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {
495 printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n",
496 acpi_os_name);
497 *new_val = acpi_os_name;
500 return AE_OK;
503 acpi_status
504 acpi_os_table_override(struct acpi_table_header * existing_table,
505 struct acpi_table_header ** new_table)
507 if (!existing_table || !new_table)
508 return AE_BAD_PARAMETER;
510 *new_table = NULL;
512 #ifdef CONFIG_ACPI_CUSTOM_DSDT
513 if (strncmp(existing_table->signature, "DSDT", 4) == 0)
514 *new_table = (struct acpi_table_header *)AmlCode;
515 #endif
516 if (*new_table != NULL) {
517 printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], "
518 "this is unsafe: tainting kernel\n",
519 existing_table->signature,
520 existing_table->oem_table_id);
521 add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);
523 return AE_OK;
526 static irqreturn_t acpi_irq(int irq, void *dev_id)
528 u32 handled;
530 handled = (*acpi_irq_handler) (acpi_irq_context);
532 if (handled) {
533 acpi_irq_handled++;
534 return IRQ_HANDLED;
535 } else {
536 acpi_irq_not_handled++;
537 return IRQ_NONE;
541 acpi_status
542 acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
543 void *context)
545 unsigned int irq;
547 acpi_irq_stats_init();
550 * ACPI interrupts different from the SCI in our copy of the FADT are
551 * not supported.
553 if (gsi != acpi_gbl_FADT.sci_interrupt)
554 return AE_BAD_PARAMETER;
556 if (acpi_irq_handler)
557 return AE_ALREADY_ACQUIRED;
559 if (acpi_gsi_to_irq(gsi, &irq) < 0) {
560 printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n",
561 gsi);
562 return AE_OK;
565 acpi_irq_handler = handler;
566 acpi_irq_context = context;
567 if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
568 printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq);
569 acpi_irq_handler = NULL;
570 return AE_NOT_ACQUIRED;
573 return AE_OK;
576 acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler)
578 if (irq != acpi_gbl_FADT.sci_interrupt)
579 return AE_BAD_PARAMETER;
581 free_irq(irq, acpi_irq);
582 acpi_irq_handler = NULL;
584 return AE_OK;
588 * Running in interpreter thread context, safe to sleep
591 void acpi_os_sleep(u64 ms)
593 schedule_timeout_interruptible(msecs_to_jiffies(ms));
596 void acpi_os_stall(u32 us)
598 while (us) {
599 u32 delay = 1000;
601 if (delay > us)
602 delay = us;
603 udelay(delay);
604 touch_nmi_watchdog();
605 us -= delay;
610 * Support ACPI 3.0 AML Timer operand
611 * Returns 64-bit free-running, monotonically increasing timer
612 * with 100ns granularity
614 u64 acpi_os_get_timer(void)
616 static u64 t;
618 #ifdef CONFIG_HPET
619 /* TBD: use HPET if available */
620 #endif
622 #ifdef CONFIG_X86_PM_TIMER
623 /* TBD: default to PM timer if HPET was not available */
624 #endif
625 if (!t)
626 printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n");
628 return ++t;
631 acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
633 u32 dummy;
635 if (!value)
636 value = &dummy;
638 *value = 0;
639 if (width <= 8) {
640 *(u8 *) value = inb(port);
641 } else if (width <= 16) {
642 *(u16 *) value = inw(port);
643 } else if (width <= 32) {
644 *(u32 *) value = inl(port);
645 } else {
646 BUG();
649 return AE_OK;
652 EXPORT_SYMBOL(acpi_os_read_port);
654 acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
656 if (width <= 8) {
657 outb(value, port);
658 } else if (width <= 16) {
659 outw(value, port);
660 } else if (width <= 32) {
661 outl(value, port);
662 } else {
663 BUG();
666 return AE_OK;
669 EXPORT_SYMBOL(acpi_os_write_port);
671 acpi_status
672 acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width)
674 void __iomem *virt_addr;
675 unsigned int size = width / 8;
676 bool unmap = false;
677 u32 dummy;
679 rcu_read_lock();
680 virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
681 if (!virt_addr) {
682 rcu_read_unlock();
683 virt_addr = acpi_os_ioremap(phys_addr, size);
684 if (!virt_addr)
685 return AE_BAD_ADDRESS;
686 unmap = true;
689 if (!value)
690 value = &dummy;
692 switch (width) {
693 case 8:
694 *(u8 *) value = readb(virt_addr);
695 break;
696 case 16:
697 *(u16 *) value = readw(virt_addr);
698 break;
699 case 32:
700 *(u32 *) value = readl(virt_addr);
701 break;
702 default:
703 BUG();
706 if (unmap)
707 iounmap(virt_addr);
708 else
709 rcu_read_unlock();
711 return AE_OK;
714 acpi_status
715 acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width)
717 void __iomem *virt_addr;
718 unsigned int size = width / 8;
719 bool unmap = false;
721 rcu_read_lock();
722 virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
723 if (!virt_addr) {
724 rcu_read_unlock();
725 virt_addr = acpi_os_ioremap(phys_addr, size);
726 if (!virt_addr)
727 return AE_BAD_ADDRESS;
728 unmap = true;
731 switch (width) {
732 case 8:
733 writeb(value, virt_addr);
734 break;
735 case 16:
736 writew(value, virt_addr);
737 break;
738 case 32:
739 writel(value, virt_addr);
740 break;
741 default:
742 BUG();
745 if (unmap)
746 iounmap(virt_addr);
747 else
748 rcu_read_unlock();
750 return AE_OK;
753 acpi_status
754 acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
755 u64 *value, u32 width)
757 int result, size;
758 u32 value32;
760 if (!value)
761 return AE_BAD_PARAMETER;
763 switch (width) {
764 case 8:
765 size = 1;
766 break;
767 case 16:
768 size = 2;
769 break;
770 case 32:
771 size = 4;
772 break;
773 default:
774 return AE_ERROR;
777 result = raw_pci_read(pci_id->segment, pci_id->bus,
778 PCI_DEVFN(pci_id->device, pci_id->function),
779 reg, size, &value32);
780 *value = value32;
782 return (result ? AE_ERROR : AE_OK);
785 acpi_status
786 acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
787 u64 value, u32 width)
789 int result, size;
791 switch (width) {
792 case 8:
793 size = 1;
794 break;
795 case 16:
796 size = 2;
797 break;
798 case 32:
799 size = 4;
800 break;
801 default:
802 return AE_ERROR;
805 result = raw_pci_write(pci_id->segment, pci_id->bus,
806 PCI_DEVFN(pci_id->device, pci_id->function),
807 reg, size, value);
809 return (result ? AE_ERROR : AE_OK);
812 static void acpi_os_execute_deferred(struct work_struct *work)
814 struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
816 if (dpc->wait)
817 acpi_os_wait_events_complete(NULL);
819 dpc->function(dpc->context);
820 kfree(dpc);
823 /*******************************************************************************
825 * FUNCTION: acpi_os_execute
827 * PARAMETERS: Type - Type of the callback
828 * Function - Function to be executed
829 * Context - Function parameters
831 * RETURN: Status
833 * DESCRIPTION: Depending on type, either queues function for deferred execution or
834 * immediately executes function on a separate thread.
836 ******************************************************************************/
838 static acpi_status __acpi_os_execute(acpi_execute_type type,
839 acpi_osd_exec_callback function, void *context, int hp)
841 acpi_status status = AE_OK;
842 struct acpi_os_dpc *dpc;
843 struct workqueue_struct *queue;
844 int ret;
845 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
846 "Scheduling function [%p(%p)] for deferred execution.\n",
847 function, context));
850 * Allocate/initialize DPC structure. Note that this memory will be
851 * freed by the callee. The kernel handles the work_struct list in a
852 * way that allows us to also free its memory inside the callee.
853 * Because we may want to schedule several tasks with different
854 * parameters we can't use the approach some kernel code uses of
855 * having a static work_struct.
858 dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
859 if (!dpc)
860 return AE_NO_MEMORY;
862 dpc->function = function;
863 dpc->context = context;
866 * We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq
867 * because the hotplug code may call driver .remove() functions,
868 * which invoke flush_scheduled_work/acpi_os_wait_events_complete
869 * to flush these workqueues.
871 queue = hp ? kacpi_hotplug_wq :
872 (type == OSL_NOTIFY_HANDLER ? kacpi_notify_wq : kacpid_wq);
873 dpc->wait = hp ? 1 : 0;
875 if (queue == kacpi_hotplug_wq)
876 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
877 else if (queue == kacpi_notify_wq)
878 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
879 else
880 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
883 * On some machines, a software-initiated SMI causes corruption unless
884 * the SMI runs on CPU 0. An SMI can be initiated by any AML, but
885 * typically it's done in GPE-related methods that are run via
886 * workqueues, so we can avoid the known corruption cases by always
887 * queueing on CPU 0.
889 ret = queue_work_on(0, queue, &dpc->work);
891 if (!ret) {
892 printk(KERN_ERR PREFIX
893 "Call to queue_work() failed.\n");
894 status = AE_ERROR;
895 kfree(dpc);
897 return status;
900 acpi_status acpi_os_execute(acpi_execute_type type,
901 acpi_osd_exec_callback function, void *context)
903 return __acpi_os_execute(type, function, context, 0);
905 EXPORT_SYMBOL(acpi_os_execute);
907 acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function,
908 void *context)
910 return __acpi_os_execute(0, function, context, 1);
913 void acpi_os_wait_events_complete(void *context)
915 flush_workqueue(kacpid_wq);
916 flush_workqueue(kacpi_notify_wq);
919 EXPORT_SYMBOL(acpi_os_wait_events_complete);
921 acpi_status
922 acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
924 struct semaphore *sem = NULL;
926 sem = acpi_os_allocate(sizeof(struct semaphore));
927 if (!sem)
928 return AE_NO_MEMORY;
929 memset(sem, 0, sizeof(struct semaphore));
931 sema_init(sem, initial_units);
933 *handle = (acpi_handle *) sem;
935 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n",
936 *handle, initial_units));
938 return AE_OK;
942 * TODO: A better way to delete semaphores? Linux doesn't have a
943 * 'delete_semaphore()' function -- may result in an invalid
944 * pointer dereference for non-synchronized consumers. Should
945 * we at least check for blocked threads and signal/cancel them?
948 acpi_status acpi_os_delete_semaphore(acpi_handle handle)
950 struct semaphore *sem = (struct semaphore *)handle;
952 if (!sem)
953 return AE_BAD_PARAMETER;
955 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle));
957 BUG_ON(!list_empty(&sem->wait_list));
958 kfree(sem);
959 sem = NULL;
961 return AE_OK;
965 * TODO: Support for units > 1?
967 acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
969 acpi_status status = AE_OK;
970 struct semaphore *sem = (struct semaphore *)handle;
971 long jiffies;
972 int ret = 0;
974 if (!sem || (units < 1))
975 return AE_BAD_PARAMETER;
977 if (units > 1)
978 return AE_SUPPORT;
980 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
981 handle, units, timeout));
983 if (timeout == ACPI_WAIT_FOREVER)
984 jiffies = MAX_SCHEDULE_TIMEOUT;
985 else
986 jiffies = msecs_to_jiffies(timeout);
988 ret = down_timeout(sem, jiffies);
989 if (ret)
990 status = AE_TIME;
992 if (ACPI_FAILURE(status)) {
993 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
994 "Failed to acquire semaphore[%p|%d|%d], %s",
995 handle, units, timeout,
996 acpi_format_exception(status)));
997 } else {
998 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
999 "Acquired semaphore[%p|%d|%d]", handle,
1000 units, timeout));
1003 return status;
1007 * TODO: Support for units > 1?
1009 acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
1011 struct semaphore *sem = (struct semaphore *)handle;
1013 if (!sem || (units < 1))
1014 return AE_BAD_PARAMETER;
1016 if (units > 1)
1017 return AE_SUPPORT;
1019 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle,
1020 units));
1022 up(sem);
1024 return AE_OK;
1027 #ifdef ACPI_FUTURE_USAGE
1028 u32 acpi_os_get_line(char *buffer)
1031 #ifdef ENABLE_DEBUGGER
1032 if (acpi_in_debugger) {
1033 u32 chars;
1035 kdb_read(buffer, sizeof(line_buf));
1037 /* remove the CR kdb includes */
1038 chars = strlen(buffer) - 1;
1039 buffer[chars] = '\0';
1041 #endif
1043 return 0;
1045 #endif /* ACPI_FUTURE_USAGE */
1047 acpi_status acpi_os_signal(u32 function, void *info)
1049 switch (function) {
1050 case ACPI_SIGNAL_FATAL:
1051 printk(KERN_ERR PREFIX "Fatal opcode executed\n");
1052 break;
1053 case ACPI_SIGNAL_BREAKPOINT:
1055 * AML Breakpoint
1056 * ACPI spec. says to treat it as a NOP unless
1057 * you are debugging. So if/when we integrate
1058 * AML debugger into the kernel debugger its
1059 * hook will go here. But until then it is
1060 * not useful to print anything on breakpoints.
1062 break;
1063 default:
1064 break;
1067 return AE_OK;
1070 static int __init acpi_os_name_setup(char *str)
1072 char *p = acpi_os_name;
1073 int count = ACPI_MAX_OVERRIDE_LEN - 1;
1075 if (!str || !*str)
1076 return 0;
1078 for (; count-- && str && *str; str++) {
1079 if (isalnum(*str) || *str == ' ' || *str == ':')
1080 *p++ = *str;
1081 else if (*str == '\'' || *str == '"')
1082 continue;
1083 else
1084 break;
1086 *p = 0;
1088 return 1;
1092 __setup("acpi_os_name=", acpi_os_name_setup);
1094 #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
1095 #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */
1097 struct osi_setup_entry {
1098 char string[OSI_STRING_LENGTH_MAX];
1099 bool enable;
1102 static struct osi_setup_entry __initdata
1103 osi_setup_entries[OSI_STRING_ENTRIES_MAX] = {
1104 {"Module Device", true},
1105 {"Processor Device", true},
1106 {"3.0 _SCP Extensions", true},
1107 {"Processor Aggregator Device", true},
1110 void __init acpi_osi_setup(char *str)
1112 struct osi_setup_entry *osi;
1113 bool enable = true;
1114 int i;
1116 if (!acpi_gbl_create_osi_method)
1117 return;
1119 if (str == NULL || *str == '\0') {
1120 printk(KERN_INFO PREFIX "_OSI method disabled\n");
1121 acpi_gbl_create_osi_method = FALSE;
1122 return;
1125 if (*str == '!') {
1126 str++;
1127 enable = false;
1130 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1131 osi = &osi_setup_entries[i];
1132 if (!strcmp(osi->string, str)) {
1133 osi->enable = enable;
1134 break;
1135 } else if (osi->string[0] == '\0') {
1136 osi->enable = enable;
1137 strncpy(osi->string, str, OSI_STRING_LENGTH_MAX);
1138 break;
1143 static void __init set_osi_linux(unsigned int enable)
1145 if (osi_linux.enable != enable)
1146 osi_linux.enable = enable;
1148 if (osi_linux.enable)
1149 acpi_osi_setup("Linux");
1150 else
1151 acpi_osi_setup("!Linux");
1153 return;
1156 static void __init acpi_cmdline_osi_linux(unsigned int enable)
1158 osi_linux.cmdline = 1; /* cmdline set the default and override DMI */
1159 osi_linux.dmi = 0;
1160 set_osi_linux(enable);
1162 return;
1165 void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d)
1167 printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
1169 if (enable == -1)
1170 return;
1172 osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */
1173 set_osi_linux(enable);
1175 return;
1179 * Modify the list of "OS Interfaces" reported to BIOS via _OSI
1181 * empty string disables _OSI
1182 * string starting with '!' disables that string
1183 * otherwise string is added to list, augmenting built-in strings
1185 static void __init acpi_osi_setup_late(void)
1187 struct osi_setup_entry *osi;
1188 char *str;
1189 int i;
1190 acpi_status status;
1192 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1193 osi = &osi_setup_entries[i];
1194 str = osi->string;
1196 if (*str == '\0')
1197 break;
1198 if (osi->enable) {
1199 status = acpi_install_interface(str);
1201 if (ACPI_SUCCESS(status))
1202 printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
1203 } else {
1204 status = acpi_remove_interface(str);
1206 if (ACPI_SUCCESS(status))
1207 printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
1212 static int __init osi_setup(char *str)
1214 if (str && !strcmp("Linux", str))
1215 acpi_cmdline_osi_linux(1);
1216 else if (str && !strcmp("!Linux", str))
1217 acpi_cmdline_osi_linux(0);
1218 else
1219 acpi_osi_setup(str);
1221 return 1;
1224 __setup("acpi_osi=", osi_setup);
1226 /* enable serialization to combat AE_ALREADY_EXISTS errors */
1227 static int __init acpi_serialize_setup(char *str)
1229 printk(KERN_INFO PREFIX "serialize enabled\n");
1231 acpi_gbl_all_methods_serialized = TRUE;
1233 return 1;
1236 __setup("acpi_serialize", acpi_serialize_setup);
1238 /* Check of resource interference between native drivers and ACPI
1239 * OperationRegions (SystemIO and System Memory only).
1240 * IO ports and memory declared in ACPI might be used by the ACPI subsystem
1241 * in arbitrary AML code and can interfere with legacy drivers.
1242 * acpi_enforce_resources= can be set to:
1244 * - strict (default) (2)
1245 * -> further driver trying to access the resources will not load
1246 * - lax (1)
1247 * -> further driver trying to access the resources will load, but you
1248 * get a system message that something might go wrong...
1250 * - no (0)
1251 * -> ACPI Operation Region resources will not be registered
1254 #define ENFORCE_RESOURCES_STRICT 2
1255 #define ENFORCE_RESOURCES_LAX 1
1256 #define ENFORCE_RESOURCES_NO 0
1258 static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1260 static int __init acpi_enforce_resources_setup(char *str)
1262 if (str == NULL || *str == '\0')
1263 return 0;
1265 if (!strcmp("strict", str))
1266 acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1267 else if (!strcmp("lax", str))
1268 acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
1269 else if (!strcmp("no", str))
1270 acpi_enforce_resources = ENFORCE_RESOURCES_NO;
1272 return 1;
1275 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup);
1277 /* Check for resource conflicts between ACPI OperationRegions and native
1278 * drivers */
1279 int acpi_check_resource_conflict(const struct resource *res)
1281 struct acpi_res_list *res_list_elem;
1282 int ioport = 0, clash = 0;
1284 if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
1285 return 0;
1286 if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM))
1287 return 0;
1289 ioport = res->flags & IORESOURCE_IO;
1291 spin_lock(&acpi_res_lock);
1292 list_for_each_entry(res_list_elem, &resource_list_head,
1293 resource_list) {
1294 if (ioport && (res_list_elem->resource_type
1295 != ACPI_ADR_SPACE_SYSTEM_IO))
1296 continue;
1297 if (!ioport && (res_list_elem->resource_type
1298 != ACPI_ADR_SPACE_SYSTEM_MEMORY))
1299 continue;
1301 if (res->end < res_list_elem->start
1302 || res_list_elem->end < res->start)
1303 continue;
1304 clash = 1;
1305 break;
1307 spin_unlock(&acpi_res_lock);
1309 if (clash) {
1310 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) {
1311 printk(KERN_WARNING "ACPI: resource %s %pR"
1312 " conflicts with ACPI region %s "
1313 "[%s 0x%zx-0x%zx]\n",
1314 res->name, res, res_list_elem->name,
1315 (res_list_elem->resource_type ==
1316 ACPI_ADR_SPACE_SYSTEM_IO) ? "io" : "mem",
1317 (size_t) res_list_elem->start,
1318 (size_t) res_list_elem->end);
1319 if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX)
1320 printk(KERN_NOTICE "ACPI: This conflict may"
1321 " cause random problems and system"
1322 " instability\n");
1323 printk(KERN_INFO "ACPI: If an ACPI driver is available"
1324 " for this device, you should use it instead of"
1325 " the native driver\n");
1327 if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
1328 return -EBUSY;
1330 return 0;
1332 EXPORT_SYMBOL(acpi_check_resource_conflict);
1334 int acpi_check_region(resource_size_t start, resource_size_t n,
1335 const char *name)
1337 struct resource res = {
1338 .start = start,
1339 .end = start + n - 1,
1340 .name = name,
1341 .flags = IORESOURCE_IO,
1344 return acpi_check_resource_conflict(&res);
1346 EXPORT_SYMBOL(acpi_check_region);
1349 * Let drivers know whether the resource checks are effective
1351 int acpi_resources_are_enforced(void)
1353 return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT;
1355 EXPORT_SYMBOL(acpi_resources_are_enforced);
1358 * Deallocate the memory for a spinlock.
1360 void acpi_os_delete_lock(acpi_spinlock handle)
1362 ACPI_FREE(handle);
1366 * Acquire a spinlock.
1368 * handle is a pointer to the spinlock_t.
1371 acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
1373 acpi_cpu_flags flags;
1374 spin_lock_irqsave(lockp, flags);
1375 return flags;
1379 * Release a spinlock. See above.
1382 void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)
1384 spin_unlock_irqrestore(lockp, flags);
1387 #ifndef ACPI_USE_LOCAL_CACHE
1389 /*******************************************************************************
1391 * FUNCTION: acpi_os_create_cache
1393 * PARAMETERS: name - Ascii name for the cache
1394 * size - Size of each cached object
1395 * depth - Maximum depth of the cache (in objects) <ignored>
1396 * cache - Where the new cache object is returned
1398 * RETURN: status
1400 * DESCRIPTION: Create a cache object
1402 ******************************************************************************/
1404 acpi_status
1405 acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
1407 *cache = kmem_cache_create(name, size, 0, 0, NULL);
1408 if (*cache == NULL)
1409 return AE_ERROR;
1410 else
1411 return AE_OK;
1414 /*******************************************************************************
1416 * FUNCTION: acpi_os_purge_cache
1418 * PARAMETERS: Cache - Handle to cache object
1420 * RETURN: Status
1422 * DESCRIPTION: Free all objects within the requested cache.
1424 ******************************************************************************/
1426 acpi_status acpi_os_purge_cache(acpi_cache_t * cache)
1428 kmem_cache_shrink(cache);
1429 return (AE_OK);
1432 /*******************************************************************************
1434 * FUNCTION: acpi_os_delete_cache
1436 * PARAMETERS: Cache - Handle to cache object
1438 * RETURN: Status
1440 * DESCRIPTION: Free all objects within the requested cache and delete the
1441 * cache object.
1443 ******************************************************************************/
1445 acpi_status acpi_os_delete_cache(acpi_cache_t * cache)
1447 kmem_cache_destroy(cache);
1448 return (AE_OK);
1451 /*******************************************************************************
1453 * FUNCTION: acpi_os_release_object
1455 * PARAMETERS: Cache - Handle to cache object
1456 * Object - The object to be released
1458 * RETURN: None
1460 * DESCRIPTION: Release an object to the specified cache. If cache is full,
1461 * the object is deleted.
1463 ******************************************************************************/
1465 acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
1467 kmem_cache_free(cache, object);
1468 return (AE_OK);
1471 static inline int acpi_res_list_add(struct acpi_res_list *res)
1473 struct acpi_res_list *res_list_elem;
1475 list_for_each_entry(res_list_elem, &resource_list_head,
1476 resource_list) {
1478 if (res->resource_type == res_list_elem->resource_type &&
1479 res->start == res_list_elem->start &&
1480 res->end == res_list_elem->end) {
1483 * The Region(addr,len) already exist in the list,
1484 * just increase the count
1487 res_list_elem->count++;
1488 return 0;
1492 res->count = 1;
1493 list_add(&res->resource_list, &resource_list_head);
1494 return 1;
1497 static inline void acpi_res_list_del(struct acpi_res_list *res)
1499 struct acpi_res_list *res_list_elem;
1501 list_for_each_entry(res_list_elem, &resource_list_head,
1502 resource_list) {
1504 if (res->resource_type == res_list_elem->resource_type &&
1505 res->start == res_list_elem->start &&
1506 res->end == res_list_elem->end) {
1509 * If the res count is decreased to 0,
1510 * remove and free it
1513 if (--res_list_elem->count == 0) {
1514 list_del(&res_list_elem->resource_list);
1515 kfree(res_list_elem);
1517 return;
1522 acpi_status
1523 acpi_os_invalidate_address(
1524 u8 space_id,
1525 acpi_physical_address address,
1526 acpi_size length)
1528 struct acpi_res_list res;
1530 switch (space_id) {
1531 case ACPI_ADR_SPACE_SYSTEM_IO:
1532 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
1533 /* Only interference checks against SystemIO and SystemMemory
1534 are needed */
1535 res.start = address;
1536 res.end = address + length - 1;
1537 res.resource_type = space_id;
1538 spin_lock(&acpi_res_lock);
1539 acpi_res_list_del(&res);
1540 spin_unlock(&acpi_res_lock);
1541 break;
1542 case ACPI_ADR_SPACE_PCI_CONFIG:
1543 case ACPI_ADR_SPACE_EC:
1544 case ACPI_ADR_SPACE_SMBUS:
1545 case ACPI_ADR_SPACE_CMOS:
1546 case ACPI_ADR_SPACE_PCI_BAR_TARGET:
1547 case ACPI_ADR_SPACE_DATA_TABLE:
1548 case ACPI_ADR_SPACE_FIXED_HARDWARE:
1549 break;
1551 return AE_OK;
1554 /******************************************************************************
1556 * FUNCTION: acpi_os_validate_address
1558 * PARAMETERS: space_id - ACPI space ID
1559 * address - Physical address
1560 * length - Address length
1562 * RETURN: AE_OK if address/length is valid for the space_id. Otherwise,
1563 * should return AE_AML_ILLEGAL_ADDRESS.
1565 * DESCRIPTION: Validate a system address via the host OS. Used to validate
1566 * the addresses accessed by AML operation regions.
1568 *****************************************************************************/
1570 acpi_status
1571 acpi_os_validate_address (
1572 u8 space_id,
1573 acpi_physical_address address,
1574 acpi_size length,
1575 char *name)
1577 struct acpi_res_list *res;
1578 int added;
1579 if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
1580 return AE_OK;
1582 switch (space_id) {
1583 case ACPI_ADR_SPACE_SYSTEM_IO:
1584 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
1585 /* Only interference checks against SystemIO and SystemMemory
1586 are needed */
1587 res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL);
1588 if (!res)
1589 return AE_OK;
1590 /* ACPI names are fixed to 4 bytes, still better use strlcpy */
1591 strlcpy(res->name, name, 5);
1592 res->start = address;
1593 res->end = address + length - 1;
1594 res->resource_type = space_id;
1595 spin_lock(&acpi_res_lock);
1596 added = acpi_res_list_add(res);
1597 spin_unlock(&acpi_res_lock);
1598 pr_debug("%s %s resource: start: 0x%llx, end: 0x%llx, "
1599 "name: %s\n", added ? "Added" : "Already exist",
1600 (space_id == ACPI_ADR_SPACE_SYSTEM_IO)
1601 ? "SystemIO" : "System Memory",
1602 (unsigned long long)res->start,
1603 (unsigned long long)res->end,
1604 res->name);
1605 if (!added)
1606 kfree(res);
1607 break;
1608 case ACPI_ADR_SPACE_PCI_CONFIG:
1609 case ACPI_ADR_SPACE_EC:
1610 case ACPI_ADR_SPACE_SMBUS:
1611 case ACPI_ADR_SPACE_CMOS:
1612 case ACPI_ADR_SPACE_PCI_BAR_TARGET:
1613 case ACPI_ADR_SPACE_DATA_TABLE:
1614 case ACPI_ADR_SPACE_FIXED_HARDWARE:
1615 break;
1617 return AE_OK;
1619 #endif
1621 acpi_status __init acpi_os_initialize(void)
1623 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
1624 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
1625 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block);
1626 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block);
1628 return AE_OK;
1631 acpi_status __init acpi_os_initialize1(void)
1633 kacpid_wq = alloc_workqueue("kacpid", 0, 1);
1634 kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1);
1635 kacpi_hotplug_wq = alloc_workqueue("kacpi_hotplug", 0, 1);
1636 BUG_ON(!kacpid_wq);
1637 BUG_ON(!kacpi_notify_wq);
1638 BUG_ON(!kacpi_hotplug_wq);
1639 acpi_install_interface_handler(acpi_osi_handler);
1640 acpi_osi_setup_late();
1641 return AE_OK;
1644 acpi_status acpi_os_terminate(void)
1646 if (acpi_irq_handler) {
1647 acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt,
1648 acpi_irq_handler);
1651 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block);
1652 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block);
1653 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
1654 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
1656 destroy_workqueue(kacpid_wq);
1657 destroy_workqueue(kacpi_notify_wq);
1658 destroy_workqueue(kacpi_hotplug_wq);
1660 return AE_OK;