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26#include <linux/module.h>
27#include <linux/kernel.h>
28#include <linux/slab.h>
29#include <linux/mm.h>
30#include <linux/highmem.h>
31#include <linux/pci.h>
32#include <linux/interrupt.h>
33#include <linux/kmod.h>
34#include <linux/delay.h>
35#include <linux/workqueue.h>
36#include <linux/nmi.h>
37#include <linux/acpi.h>
38#include <linux/efi.h>
39#include <linux/ioport.h>
40#include <linux/list.h>
41#include <linux/jiffies.h>
42#include <linux/semaphore.h>
43
44#include <asm/io.h>
45#include <asm/uaccess.h>
46#include <linux/io-64-nonatomic-lo-hi.h>
47
48#include "internal.h"
49
50#define _COMPONENT ACPI_OS_SERVICES
51ACPI_MODULE_NAME("osl");
52
53struct acpi_os_dpc {
54 acpi_osd_exec_callback function;
55 void *context;
56 struct work_struct work;
57};
58
59#ifdef ENABLE_DEBUGGER
60#include <linux/kdb.h>
61
62
63int acpi_in_debugger;
64EXPORT_SYMBOL(acpi_in_debugger);
65#endif
66
67static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl,
68 u32 pm1b_ctrl);
69static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a,
70 u32 val_b);
71
72static acpi_osd_handler acpi_irq_handler;
73static void *acpi_irq_context;
74static struct workqueue_struct *kacpid_wq;
75static struct workqueue_struct *kacpi_notify_wq;
76static struct workqueue_struct *kacpi_hotplug_wq;
77static bool acpi_os_initialized;
78unsigned int acpi_sci_irq = INVALID_ACPI_IRQ;
79
80
81
82
83
84struct acpi_ioremap {
85 struct list_head list;
86 void __iomem *virt;
87 acpi_physical_address phys;
88 acpi_size size;
89 unsigned long refcount;
90};
91
92static LIST_HEAD(acpi_ioremaps);
93static DEFINE_MUTEX(acpi_ioremap_lock);
94
95static void __init acpi_request_region (struct acpi_generic_address *gas,
96 unsigned int length, char *desc)
97{
98 u64 addr;
99
100
101 memcpy(&addr, &gas->address, sizeof(addr));
102 if (!addr || !length)
103 return;
104
105
106 if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
107 request_region(addr, length, desc);
108 else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
109 request_mem_region(addr, length, desc);
110}
111
112static int __init acpi_reserve_resources(void)
113{
114 acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length,
115 "ACPI PM1a_EVT_BLK");
116
117 acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length,
118 "ACPI PM1b_EVT_BLK");
119
120 acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length,
121 "ACPI PM1a_CNT_BLK");
122
123 acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length,
124 "ACPI PM1b_CNT_BLK");
125
126 if (acpi_gbl_FADT.pm_timer_length == 4)
127 acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR");
128
129 acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length,
130 "ACPI PM2_CNT_BLK");
131
132
133
134 if (!(acpi_gbl_FADT.gpe0_block_length & 0x1))
135 acpi_request_region(&acpi_gbl_FADT.xgpe0_block,
136 acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK");
137
138 if (!(acpi_gbl_FADT.gpe1_block_length & 0x1))
139 acpi_request_region(&acpi_gbl_FADT.xgpe1_block,
140 acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK");
141
142 return 0;
143}
144fs_initcall_sync(acpi_reserve_resources);
145
146void acpi_os_printf(const char *fmt, ...)
147{
148 va_list args;
149 va_start(args, fmt);
150 acpi_os_vprintf(fmt, args);
151 va_end(args);
152}
153EXPORT_SYMBOL(acpi_os_printf);
154
155void acpi_os_vprintf(const char *fmt, va_list args)
156{
157 static char buffer[512];
158
159 vsprintf(buffer, fmt, args);
160
161#ifdef ENABLE_DEBUGGER
162 if (acpi_in_debugger) {
163 kdb_printf("%s", buffer);
164 } else {
165 if (printk_get_level(buffer))
166 printk("%s", buffer);
167 else
168 printk(KERN_CONT "%s", buffer);
169 }
170#else
171 if (acpi_debugger_write_log(buffer) < 0) {
172 if (printk_get_level(buffer))
173 printk("%s", buffer);
174 else
175 printk(KERN_CONT "%s", buffer);
176 }
177#endif
178}
179
180#ifdef CONFIG_KEXEC
181static unsigned long acpi_rsdp;
182static int __init setup_acpi_rsdp(char *arg)
183{
184 if (kstrtoul(arg, 16, &acpi_rsdp))
185 return -EINVAL;
186 return 0;
187}
188early_param("acpi_rsdp", setup_acpi_rsdp);
189#endif
190
191acpi_physical_address __init acpi_os_get_root_pointer(void)
192{
193#ifdef CONFIG_KEXEC
194 if (acpi_rsdp)
195 return acpi_rsdp;
196#endif
197
198 if (efi_enabled(EFI_CONFIG_TABLES)) {
199 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
200 return efi.acpi20;
201 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
202 return efi.acpi;
203 else {
204 printk(KERN_ERR PREFIX
205 "System description tables not found\n");
206 return 0;
207 }
208 } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) {
209 acpi_physical_address pa = 0;
210
211 acpi_find_root_pointer(&pa);
212 return pa;
213 }
214
215 return 0;
216}
217
218
219static struct acpi_ioremap *
220acpi_map_lookup(acpi_physical_address phys, acpi_size size)
221{
222 struct acpi_ioremap *map;
223
224 list_for_each_entry_rcu(map, &acpi_ioremaps, list)
225 if (map->phys <= phys &&
226 phys + size <= map->phys + map->size)
227 return map;
228
229 return NULL;
230}
231
232
233static void __iomem *
234acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size)
235{
236 struct acpi_ioremap *map;
237
238 map = acpi_map_lookup(phys, size);
239 if (map)
240 return map->virt + (phys - map->phys);
241
242 return NULL;
243}
244
245void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size)
246{
247 struct acpi_ioremap *map;
248 void __iomem *virt = NULL;
249
250 mutex_lock(&acpi_ioremap_lock);
251 map = acpi_map_lookup(phys, size);
252 if (map) {
253 virt = map->virt + (phys - map->phys);
254 map->refcount++;
255 }
256 mutex_unlock(&acpi_ioremap_lock);
257 return virt;
258}
259EXPORT_SYMBOL_GPL(acpi_os_get_iomem);
260
261
262static struct acpi_ioremap *
263acpi_map_lookup_virt(void __iomem *virt, acpi_size size)
264{
265 struct acpi_ioremap *map;
266
267 list_for_each_entry_rcu(map, &acpi_ioremaps, list)
268 if (map->virt <= virt &&
269 virt + size <= map->virt + map->size)
270 return map;
271
272 return NULL;
273}
274
275#if defined(CONFIG_IA64) || defined(CONFIG_ARM64)
276
277#define should_use_kmap(pfn) 0
278#else
279#define should_use_kmap(pfn) page_is_ram(pfn)
280#endif
281
282static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz)
283{
284 unsigned long pfn;
285
286 pfn = pg_off >> PAGE_SHIFT;
287 if (should_use_kmap(pfn)) {
288 if (pg_sz > PAGE_SIZE)
289 return NULL;
290 return (void __iomem __force *)kmap(pfn_to_page(pfn));
291 } else
292 return acpi_os_ioremap(pg_off, pg_sz);
293}
294
295static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr)
296{
297 unsigned long pfn;
298
299 pfn = pg_off >> PAGE_SHIFT;
300 if (should_use_kmap(pfn))
301 kunmap(pfn_to_page(pfn));
302 else
303 iounmap(vaddr);
304}
305
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313
314
315
316
317
318
319void __iomem *__ref
320acpi_os_map_iomem(acpi_physical_address phys, acpi_size size)
321{
322 struct acpi_ioremap *map;
323 void __iomem *virt;
324 acpi_physical_address pg_off;
325 acpi_size pg_sz;
326
327 if (phys > ULONG_MAX) {
328 printk(KERN_ERR PREFIX "Cannot map memory that high\n");
329 return NULL;
330 }
331
332 if (!acpi_gbl_permanent_mmap)
333 return __acpi_map_table((unsigned long)phys, size);
334
335 mutex_lock(&acpi_ioremap_lock);
336
337 map = acpi_map_lookup(phys, size);
338 if (map) {
339 map->refcount++;
340 goto out;
341 }
342
343 map = kzalloc(sizeof(*map), GFP_KERNEL);
344 if (!map) {
345 mutex_unlock(&acpi_ioremap_lock);
346 return NULL;
347 }
348
349 pg_off = round_down(phys, PAGE_SIZE);
350 pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off;
351 virt = acpi_map(pg_off, pg_sz);
352 if (!virt) {
353 mutex_unlock(&acpi_ioremap_lock);
354 kfree(map);
355 return NULL;
356 }
357
358 INIT_LIST_HEAD(&map->list);
359 map->virt = virt;
360 map->phys = pg_off;
361 map->size = pg_sz;
362 map->refcount = 1;
363
364 list_add_tail_rcu(&map->list, &acpi_ioremaps);
365
366out:
367 mutex_unlock(&acpi_ioremap_lock);
368 return map->virt + (phys - map->phys);
369}
370EXPORT_SYMBOL_GPL(acpi_os_map_iomem);
371
372void *__ref acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
373{
374 return (void *)acpi_os_map_iomem(phys, size);
375}
376EXPORT_SYMBOL_GPL(acpi_os_map_memory);
377
378static void acpi_os_drop_map_ref(struct acpi_ioremap *map)
379{
380 if (!--map->refcount)
381 list_del_rcu(&map->list);
382}
383
384static void acpi_os_map_cleanup(struct acpi_ioremap *map)
385{
386 if (!map->refcount) {
387 synchronize_rcu_expedited();
388 acpi_unmap(map->phys, map->virt);
389 kfree(map);
390 }
391}
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size)
408{
409 struct acpi_ioremap *map;
410
411 if (!acpi_gbl_permanent_mmap) {
412 __acpi_unmap_table(virt, size);
413 return;
414 }
415
416 mutex_lock(&acpi_ioremap_lock);
417 map = acpi_map_lookup_virt(virt, size);
418 if (!map) {
419 mutex_unlock(&acpi_ioremap_lock);
420 WARN(true, PREFIX "%s: bad address %p\n", __func__, virt);
421 return;
422 }
423 acpi_os_drop_map_ref(map);
424 mutex_unlock(&acpi_ioremap_lock);
425
426 acpi_os_map_cleanup(map);
427}
428EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem);
429
430void __ref acpi_os_unmap_memory(void *virt, acpi_size size)
431{
432 return acpi_os_unmap_iomem((void __iomem *)virt, size);
433}
434EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
435
436void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
437{
438 if (!acpi_gbl_permanent_mmap)
439 __acpi_unmap_table(virt, size);
440}
441
442int acpi_os_map_generic_address(struct acpi_generic_address *gas)
443{
444 u64 addr;
445 void __iomem *virt;
446
447 if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
448 return 0;
449
450
451 memcpy(&addr, &gas->address, sizeof(addr));
452 if (!addr || !gas->bit_width)
453 return -EINVAL;
454
455 virt = acpi_os_map_iomem(addr, gas->bit_width / 8);
456 if (!virt)
457 return -EIO;
458
459 return 0;
460}
461EXPORT_SYMBOL(acpi_os_map_generic_address);
462
463void acpi_os_unmap_generic_address(struct acpi_generic_address *gas)
464{
465 u64 addr;
466 struct acpi_ioremap *map;
467
468 if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
469 return;
470
471
472 memcpy(&addr, &gas->address, sizeof(addr));
473 if (!addr || !gas->bit_width)
474 return;
475
476 mutex_lock(&acpi_ioremap_lock);
477 map = acpi_map_lookup(addr, gas->bit_width / 8);
478 if (!map) {
479 mutex_unlock(&acpi_ioremap_lock);
480 return;
481 }
482 acpi_os_drop_map_ref(map);
483 mutex_unlock(&acpi_ioremap_lock);
484
485 acpi_os_map_cleanup(map);
486}
487EXPORT_SYMBOL(acpi_os_unmap_generic_address);
488
489#ifdef ACPI_FUTURE_USAGE
490acpi_status
491acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)
492{
493 if (!phys || !virt)
494 return AE_BAD_PARAMETER;
495
496 *phys = virt_to_phys(virt);
497
498 return AE_OK;
499}
500#endif
501
502#ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
503static bool acpi_rev_override;
504
505int __init acpi_rev_override_setup(char *str)
506{
507 acpi_rev_override = true;
508 return 1;
509}
510__setup("acpi_rev_override", acpi_rev_override_setup);
511#else
512#define acpi_rev_override false
513#endif
514
515#define ACPI_MAX_OVERRIDE_LEN 100
516
517static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
518
519acpi_status
520acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
521 acpi_string *new_val)
522{
523 if (!init_val || !new_val)
524 return AE_BAD_PARAMETER;
525
526 *new_val = NULL;
527 if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {
528 printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n",
529 acpi_os_name);
530 *new_val = acpi_os_name;
531 }
532
533 if (!memcmp(init_val->name, "_REV", 4) && acpi_rev_override) {
534 printk(KERN_INFO PREFIX "Overriding _REV return value to 5\n");
535 *new_val = (char *)5;
536 }
537
538 return AE_OK;
539}
540
541static irqreturn_t acpi_irq(int irq, void *dev_id)
542{
543 u32 handled;
544
545 handled = (*acpi_irq_handler) (acpi_irq_context);
546
547 if (handled) {
548 acpi_irq_handled++;
549 return IRQ_HANDLED;
550 } else {
551 acpi_irq_not_handled++;
552 return IRQ_NONE;
553 }
554}
555
556acpi_status
557acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
558 void *context)
559{
560 unsigned int irq;
561
562 acpi_irq_stats_init();
563
564
565
566
567
568 if (gsi != acpi_gbl_FADT.sci_interrupt)
569 return AE_BAD_PARAMETER;
570
571 if (acpi_irq_handler)
572 return AE_ALREADY_ACQUIRED;
573
574 if (acpi_gsi_to_irq(gsi, &irq) < 0) {
575 printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n",
576 gsi);
577 return AE_OK;
578 }
579
580 acpi_irq_handler = handler;
581 acpi_irq_context = context;
582 if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
583 printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq);
584 acpi_irq_handler = NULL;
585 return AE_NOT_ACQUIRED;
586 }
587 acpi_sci_irq = irq;
588
589 return AE_OK;
590}
591
592acpi_status acpi_os_remove_interrupt_handler(u32 gsi, acpi_osd_handler handler)
593{
594 if (gsi != acpi_gbl_FADT.sci_interrupt || !acpi_sci_irq_valid())
595 return AE_BAD_PARAMETER;
596
597 free_irq(acpi_sci_irq, acpi_irq);
598 acpi_irq_handler = NULL;
599 acpi_sci_irq = INVALID_ACPI_IRQ;
600
601 return AE_OK;
602}
603
604
605
606
607
608void acpi_os_sleep(u64 ms)
609{
610 msleep(ms);
611}
612
613void acpi_os_stall(u32 us)
614{
615 while (us) {
616 u32 delay = 1000;
617
618 if (delay > us)
619 delay = us;
620 udelay(delay);
621 touch_nmi_watchdog();
622 us -= delay;
623 }
624}
625
626
627
628
629
630
631u64 acpi_os_get_timer(void)
632{
633 u64 time_ns = ktime_to_ns(ktime_get());
634 do_div(time_ns, 100);
635 return time_ns;
636}
637
638acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
639{
640 u32 dummy;
641
642 if (!value)
643 value = &dummy;
644
645 *value = 0;
646 if (width <= 8) {
647 *(u8 *) value = inb(port);
648 } else if (width <= 16) {
649 *(u16 *) value = inw(port);
650 } else if (width <= 32) {
651 *(u32 *) value = inl(port);
652 } else {
653 BUG();
654 }
655
656 return AE_OK;
657}
658
659EXPORT_SYMBOL(acpi_os_read_port);
660
661acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
662{
663 if (width <= 8) {
664 outb(value, port);
665 } else if (width <= 16) {
666 outw(value, port);
667 } else if (width <= 32) {
668 outl(value, port);
669 } else {
670 BUG();
671 }
672
673 return AE_OK;
674}
675
676EXPORT_SYMBOL(acpi_os_write_port);
677
678acpi_status
679acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width)
680{
681 void __iomem *virt_addr;
682 unsigned int size = width / 8;
683 bool unmap = false;
684 u64 dummy;
685
686 rcu_read_lock();
687 virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
688 if (!virt_addr) {
689 rcu_read_unlock();
690 virt_addr = acpi_os_ioremap(phys_addr, size);
691 if (!virt_addr)
692 return AE_BAD_ADDRESS;
693 unmap = true;
694 }
695
696 if (!value)
697 value = &dummy;
698
699 switch (width) {
700 case 8:
701 *(u8 *) value = readb(virt_addr);
702 break;
703 case 16:
704 *(u16 *) value = readw(virt_addr);
705 break;
706 case 32:
707 *(u32 *) value = readl(virt_addr);
708 break;
709 case 64:
710 *(u64 *) value = readq(virt_addr);
711 break;
712 default:
713 BUG();
714 }
715
716 if (unmap)
717 iounmap(virt_addr);
718 else
719 rcu_read_unlock();
720
721 return AE_OK;
722}
723
724acpi_status
725acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width)
726{
727 void __iomem *virt_addr;
728 unsigned int size = width / 8;
729 bool unmap = false;
730
731 rcu_read_lock();
732 virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
733 if (!virt_addr) {
734 rcu_read_unlock();
735 virt_addr = acpi_os_ioremap(phys_addr, size);
736 if (!virt_addr)
737 return AE_BAD_ADDRESS;
738 unmap = true;
739 }
740
741 switch (width) {
742 case 8:
743 writeb(value, virt_addr);
744 break;
745 case 16:
746 writew(value, virt_addr);
747 break;
748 case 32:
749 writel(value, virt_addr);
750 break;
751 case 64:
752 writeq(value, virt_addr);
753 break;
754 default:
755 BUG();
756 }
757
758 if (unmap)
759 iounmap(virt_addr);
760 else
761 rcu_read_unlock();
762
763 return AE_OK;
764}
765
766acpi_status
767acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
768 u64 *value, u32 width)
769{
770 int result, size;
771 u32 value32;
772
773 if (!value)
774 return AE_BAD_PARAMETER;
775
776 switch (width) {
777 case 8:
778 size = 1;
779 break;
780 case 16:
781 size = 2;
782 break;
783 case 32:
784 size = 4;
785 break;
786 default:
787 return AE_ERROR;
788 }
789
790 result = raw_pci_read(pci_id->segment, pci_id->bus,
791 PCI_DEVFN(pci_id->device, pci_id->function),
792 reg, size, &value32);
793 *value = value32;
794
795 return (result ? AE_ERROR : AE_OK);
796}
797
798acpi_status
799acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
800 u64 value, u32 width)
801{
802 int result, size;
803
804 switch (width) {
805 case 8:
806 size = 1;
807 break;
808 case 16:
809 size = 2;
810 break;
811 case 32:
812 size = 4;
813 break;
814 default:
815 return AE_ERROR;
816 }
817
818 result = raw_pci_write(pci_id->segment, pci_id->bus,
819 PCI_DEVFN(pci_id->device, pci_id->function),
820 reg, size, value);
821
822 return (result ? AE_ERROR : AE_OK);
823}
824
825static void acpi_os_execute_deferred(struct work_struct *work)
826{
827 struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
828
829 dpc->function(dpc->context);
830 kfree(dpc);
831}
832
833#ifdef CONFIG_ACPI_DEBUGGER
834static struct acpi_debugger acpi_debugger;
835static bool acpi_debugger_initialized;
836
837int acpi_register_debugger(struct module *owner,
838 const struct acpi_debugger_ops *ops)
839{
840 int ret = 0;
841
842 mutex_lock(&acpi_debugger.lock);
843 if (acpi_debugger.ops) {
844 ret = -EBUSY;
845 goto err_lock;
846 }
847
848 acpi_debugger.owner = owner;
849 acpi_debugger.ops = ops;
850
851err_lock:
852 mutex_unlock(&acpi_debugger.lock);
853 return ret;
854}
855EXPORT_SYMBOL(acpi_register_debugger);
856
857void acpi_unregister_debugger(const struct acpi_debugger_ops *ops)
858{
859 mutex_lock(&acpi_debugger.lock);
860 if (ops == acpi_debugger.ops) {
861 acpi_debugger.ops = NULL;
862 acpi_debugger.owner = NULL;
863 }
864 mutex_unlock(&acpi_debugger.lock);
865}
866EXPORT_SYMBOL(acpi_unregister_debugger);
867
868int acpi_debugger_create_thread(acpi_osd_exec_callback function, void *context)
869{
870 int ret;
871 int (*func)(acpi_osd_exec_callback, void *);
872 struct module *owner;
873
874 if (!acpi_debugger_initialized)
875 return -ENODEV;
876 mutex_lock(&acpi_debugger.lock);
877 if (!acpi_debugger.ops) {
878 ret = -ENODEV;
879 goto err_lock;
880 }
881 if (!try_module_get(acpi_debugger.owner)) {
882 ret = -ENODEV;
883 goto err_lock;
884 }
885 func = acpi_debugger.ops->create_thread;
886 owner = acpi_debugger.owner;
887 mutex_unlock(&acpi_debugger.lock);
888
889 ret = func(function, context);
890
891 mutex_lock(&acpi_debugger.lock);
892 module_put(owner);
893err_lock:
894 mutex_unlock(&acpi_debugger.lock);
895 return ret;
896}
897
898ssize_t acpi_debugger_write_log(const char *msg)
899{
900 ssize_t ret;
901 ssize_t (*func)(const char *);
902 struct module *owner;
903
904 if (!acpi_debugger_initialized)
905 return -ENODEV;
906 mutex_lock(&acpi_debugger.lock);
907 if (!acpi_debugger.ops) {
908 ret = -ENODEV;
909 goto err_lock;
910 }
911 if (!try_module_get(acpi_debugger.owner)) {
912 ret = -ENODEV;
913 goto err_lock;
914 }
915 func = acpi_debugger.ops->write_log;
916 owner = acpi_debugger.owner;
917 mutex_unlock(&acpi_debugger.lock);
918
919 ret = func(msg);
920
921 mutex_lock(&acpi_debugger.lock);
922 module_put(owner);
923err_lock:
924 mutex_unlock(&acpi_debugger.lock);
925 return ret;
926}
927
928ssize_t acpi_debugger_read_cmd(char *buffer, size_t buffer_length)
929{
930 ssize_t ret;
931 ssize_t (*func)(char *, size_t);
932 struct module *owner;
933
934 if (!acpi_debugger_initialized)
935 return -ENODEV;
936 mutex_lock(&acpi_debugger.lock);
937 if (!acpi_debugger.ops) {
938 ret = -ENODEV;
939 goto err_lock;
940 }
941 if (!try_module_get(acpi_debugger.owner)) {
942 ret = -ENODEV;
943 goto err_lock;
944 }
945 func = acpi_debugger.ops->read_cmd;
946 owner = acpi_debugger.owner;
947 mutex_unlock(&acpi_debugger.lock);
948
949 ret = func(buffer, buffer_length);
950
951 mutex_lock(&acpi_debugger.lock);
952 module_put(owner);
953err_lock:
954 mutex_unlock(&acpi_debugger.lock);
955 return ret;
956}
957
958int acpi_debugger_wait_command_ready(void)
959{
960 int ret;
961 int (*func)(bool, char *, size_t);
962 struct module *owner;
963
964 if (!acpi_debugger_initialized)
965 return -ENODEV;
966 mutex_lock(&acpi_debugger.lock);
967 if (!acpi_debugger.ops) {
968 ret = -ENODEV;
969 goto err_lock;
970 }
971 if (!try_module_get(acpi_debugger.owner)) {
972 ret = -ENODEV;
973 goto err_lock;
974 }
975 func = acpi_debugger.ops->wait_command_ready;
976 owner = acpi_debugger.owner;
977 mutex_unlock(&acpi_debugger.lock);
978
979 ret = func(acpi_gbl_method_executing,
980 acpi_gbl_db_line_buf, ACPI_DB_LINE_BUFFER_SIZE);
981
982 mutex_lock(&acpi_debugger.lock);
983 module_put(owner);
984err_lock:
985 mutex_unlock(&acpi_debugger.lock);
986 return ret;
987}
988
989int acpi_debugger_notify_command_complete(void)
990{
991 int ret;
992 int (*func)(void);
993 struct module *owner;
994
995 if (!acpi_debugger_initialized)
996 return -ENODEV;
997 mutex_lock(&acpi_debugger.lock);
998 if (!acpi_debugger.ops) {
999 ret = -ENODEV;
1000 goto err_lock;
1001 }
1002 if (!try_module_get(acpi_debugger.owner)) {
1003 ret = -ENODEV;
1004 goto err_lock;
1005 }
1006 func = acpi_debugger.ops->notify_command_complete;
1007 owner = acpi_debugger.owner;
1008 mutex_unlock(&acpi_debugger.lock);
1009
1010 ret = func();
1011
1012 mutex_lock(&acpi_debugger.lock);
1013 module_put(owner);
1014err_lock:
1015 mutex_unlock(&acpi_debugger.lock);
1016 return ret;
1017}
1018
1019int __init acpi_debugger_init(void)
1020{
1021 mutex_init(&acpi_debugger.lock);
1022 acpi_debugger_initialized = true;
1023 return 0;
1024}
1025#endif
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042acpi_status acpi_os_execute(acpi_execute_type type,
1043 acpi_osd_exec_callback function, void *context)
1044{
1045 acpi_status status = AE_OK;
1046 struct acpi_os_dpc *dpc;
1047 struct workqueue_struct *queue;
1048 int ret;
1049 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
1050 "Scheduling function [%p(%p)] for deferred execution.\n",
1051 function, context));
1052
1053 if (type == OSL_DEBUGGER_MAIN_THREAD) {
1054 ret = acpi_debugger_create_thread(function, context);
1055 if (ret) {
1056 pr_err("Call to kthread_create() failed.\n");
1057 status = AE_ERROR;
1058 }
1059 goto out_thread;
1060 }
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071 dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
1072 if (!dpc)
1073 return AE_NO_MEMORY;
1074
1075 dpc->function = function;
1076 dpc->context = context;
1077
1078
1079
1080
1081
1082
1083 if (type == OSL_NOTIFY_HANDLER) {
1084 queue = kacpi_notify_wq;
1085 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
1086 } else if (type == OSL_GPE_HANDLER) {
1087 queue = kacpid_wq;
1088 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
1089 } else {
1090 pr_err("Unsupported os_execute type %d.\n", type);
1091 status = AE_ERROR;
1092 }
1093
1094 if (ACPI_FAILURE(status))
1095 goto err_workqueue;
1096
1097
1098
1099
1100
1101
1102
1103
1104 ret = queue_work_on(0, queue, &dpc->work);
1105 if (!ret) {
1106 printk(KERN_ERR PREFIX
1107 "Call to queue_work() failed.\n");
1108 status = AE_ERROR;
1109 }
1110err_workqueue:
1111 if (ACPI_FAILURE(status))
1112 kfree(dpc);
1113out_thread:
1114 return status;
1115}
1116EXPORT_SYMBOL(acpi_os_execute);
1117
1118void acpi_os_wait_events_complete(void)
1119{
1120
1121
1122
1123
1124 if (acpi_sci_irq_valid())
1125 synchronize_hardirq(acpi_sci_irq);
1126 flush_workqueue(kacpid_wq);
1127 flush_workqueue(kacpi_notify_wq);
1128}
1129
1130struct acpi_hp_work {
1131 struct work_struct work;
1132 struct acpi_device *adev;
1133 u32 src;
1134};
1135
1136static void acpi_hotplug_work_fn(struct work_struct *work)
1137{
1138 struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work);
1139
1140 acpi_os_wait_events_complete();
1141 acpi_device_hotplug(hpw->adev, hpw->src);
1142 kfree(hpw);
1143}
1144
1145acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src)
1146{
1147 struct acpi_hp_work *hpw;
1148
1149 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
1150 "Scheduling hotplug event (%p, %u) for deferred execution.\n",
1151 adev, src));
1152
1153 hpw = kmalloc(sizeof(*hpw), GFP_KERNEL);
1154 if (!hpw)
1155 return AE_NO_MEMORY;
1156
1157 INIT_WORK(&hpw->work, acpi_hotplug_work_fn);
1158 hpw->adev = adev;
1159 hpw->src = src;
1160
1161
1162
1163
1164
1165
1166 if (!queue_work(kacpi_hotplug_wq, &hpw->work)) {
1167 kfree(hpw);
1168 return AE_ERROR;
1169 }
1170 return AE_OK;
1171}
1172
1173bool acpi_queue_hotplug_work(struct work_struct *work)
1174{
1175 return queue_work(kacpi_hotplug_wq, work);
1176}
1177
1178acpi_status
1179acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
1180{
1181 struct semaphore *sem = NULL;
1182
1183 sem = acpi_os_allocate_zeroed(sizeof(struct semaphore));
1184 if (!sem)
1185 return AE_NO_MEMORY;
1186
1187 sema_init(sem, initial_units);
1188
1189 *handle = (acpi_handle *) sem;
1190
1191 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n",
1192 *handle, initial_units));
1193
1194 return AE_OK;
1195}
1196
1197
1198
1199
1200
1201
1202
1203
1204acpi_status acpi_os_delete_semaphore(acpi_handle handle)
1205{
1206 struct semaphore *sem = (struct semaphore *)handle;
1207
1208 if (!sem)
1209 return AE_BAD_PARAMETER;
1210
1211 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle));
1212
1213 BUG_ON(!list_empty(&sem->wait_list));
1214 kfree(sem);
1215 sem = NULL;
1216
1217 return AE_OK;
1218}
1219
1220
1221
1222
1223acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
1224{
1225 acpi_status status = AE_OK;
1226 struct semaphore *sem = (struct semaphore *)handle;
1227 long jiffies;
1228 int ret = 0;
1229
1230 if (!acpi_os_initialized)
1231 return AE_OK;
1232
1233 if (!sem || (units < 1))
1234 return AE_BAD_PARAMETER;
1235
1236 if (units > 1)
1237 return AE_SUPPORT;
1238
1239 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
1240 handle, units, timeout));
1241
1242 if (timeout == ACPI_WAIT_FOREVER)
1243 jiffies = MAX_SCHEDULE_TIMEOUT;
1244 else
1245 jiffies = msecs_to_jiffies(timeout);
1246
1247 ret = down_timeout(sem, jiffies);
1248 if (ret)
1249 status = AE_TIME;
1250
1251 if (ACPI_FAILURE(status)) {
1252 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
1253 "Failed to acquire semaphore[%p|%d|%d], %s",
1254 handle, units, timeout,
1255 acpi_format_exception(status)));
1256 } else {
1257 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
1258 "Acquired semaphore[%p|%d|%d]", handle,
1259 units, timeout));
1260 }
1261
1262 return status;
1263}
1264
1265
1266
1267
1268acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
1269{
1270 struct semaphore *sem = (struct semaphore *)handle;
1271
1272 if (!acpi_os_initialized)
1273 return AE_OK;
1274
1275 if (!sem || (units < 1))
1276 return AE_BAD_PARAMETER;
1277
1278 if (units > 1)
1279 return AE_SUPPORT;
1280
1281 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle,
1282 units));
1283
1284 up(sem);
1285
1286 return AE_OK;
1287}
1288
1289acpi_status acpi_os_get_line(char *buffer, u32 buffer_length, u32 *bytes_read)
1290{
1291#ifdef ENABLE_DEBUGGER
1292 if (acpi_in_debugger) {
1293 u32 chars;
1294
1295 kdb_read(buffer, buffer_length);
1296
1297
1298 chars = strlen(buffer) - 1;
1299 buffer[chars] = '\0';
1300 }
1301#else
1302 int ret;
1303
1304 ret = acpi_debugger_read_cmd(buffer, buffer_length);
1305 if (ret < 0)
1306 return AE_ERROR;
1307 if (bytes_read)
1308 *bytes_read = ret;
1309#endif
1310
1311 return AE_OK;
1312}
1313EXPORT_SYMBOL(acpi_os_get_line);
1314
1315acpi_status acpi_os_wait_command_ready(void)
1316{
1317 int ret;
1318
1319 ret = acpi_debugger_wait_command_ready();
1320 if (ret < 0)
1321 return AE_ERROR;
1322 return AE_OK;
1323}
1324
1325acpi_status acpi_os_notify_command_complete(void)
1326{
1327 int ret;
1328
1329 ret = acpi_debugger_notify_command_complete();
1330 if (ret < 0)
1331 return AE_ERROR;
1332 return AE_OK;
1333}
1334
1335acpi_status acpi_os_signal(u32 function, void *info)
1336{
1337 switch (function) {
1338 case ACPI_SIGNAL_FATAL:
1339 printk(KERN_ERR PREFIX "Fatal opcode executed\n");
1340 break;
1341 case ACPI_SIGNAL_BREAKPOINT:
1342
1343
1344
1345
1346
1347
1348
1349
1350 break;
1351 default:
1352 break;
1353 }
1354
1355 return AE_OK;
1356}
1357
1358static int __init acpi_os_name_setup(char *str)
1359{
1360 char *p = acpi_os_name;
1361 int count = ACPI_MAX_OVERRIDE_LEN - 1;
1362
1363 if (!str || !*str)
1364 return 0;
1365
1366 for (; count-- && *str; str++) {
1367 if (isalnum(*str) || *str == ' ' || *str == ':')
1368 *p++ = *str;
1369 else if (*str == '\'' || *str == '"')
1370 continue;
1371 else
1372 break;
1373 }
1374 *p = 0;
1375
1376 return 1;
1377
1378}
1379
1380__setup("acpi_os_name=", acpi_os_name_setup);
1381
1382
1383
1384
1385
1386
1387
1388static int __init acpi_no_auto_serialize_setup(char *str)
1389{
1390 acpi_gbl_auto_serialize_methods = FALSE;
1391 pr_info("ACPI: auto-serialization disabled\n");
1392
1393 return 1;
1394}
1395
1396__setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup);
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414#define ENFORCE_RESOURCES_STRICT 2
1415#define ENFORCE_RESOURCES_LAX 1
1416#define ENFORCE_RESOURCES_NO 0
1417
1418static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1419
1420static int __init acpi_enforce_resources_setup(char *str)
1421{
1422 if (str == NULL || *str == '\0')
1423 return 0;
1424
1425 if (!strcmp("strict", str))
1426 acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1427 else if (!strcmp("lax", str))
1428 acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
1429 else if (!strcmp("no", str))
1430 acpi_enforce_resources = ENFORCE_RESOURCES_NO;
1431
1432 return 1;
1433}
1434
1435__setup("acpi_enforce_resources=", acpi_enforce_resources_setup);
1436
1437
1438
1439int acpi_check_resource_conflict(const struct resource *res)
1440{
1441 acpi_adr_space_type space_id;
1442 acpi_size length;
1443 u8 warn = 0;
1444 int clash = 0;
1445
1446 if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
1447 return 0;
1448 if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM))
1449 return 0;
1450
1451 if (res->flags & IORESOURCE_IO)
1452 space_id = ACPI_ADR_SPACE_SYSTEM_IO;
1453 else
1454 space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY;
1455
1456 length = resource_size(res);
1457 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO)
1458 warn = 1;
1459 clash = acpi_check_address_range(space_id, res->start, length, warn);
1460
1461 if (clash) {
1462 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) {
1463 if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX)
1464 printk(KERN_NOTICE "ACPI: This conflict may"
1465 " cause random problems and system"
1466 " instability\n");
1467 printk(KERN_INFO "ACPI: If an ACPI driver is available"
1468 " for this device, you should use it instead of"
1469 " the native driver\n");
1470 }
1471 if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
1472 return -EBUSY;
1473 }
1474 return 0;
1475}
1476EXPORT_SYMBOL(acpi_check_resource_conflict);
1477
1478int acpi_check_region(resource_size_t start, resource_size_t n,
1479 const char *name)
1480{
1481 struct resource res = {
1482 .start = start,
1483 .end = start + n - 1,
1484 .name = name,
1485 .flags = IORESOURCE_IO,
1486 };
1487
1488 return acpi_check_resource_conflict(&res);
1489}
1490EXPORT_SYMBOL(acpi_check_region);
1491
1492
1493
1494
1495int acpi_resources_are_enforced(void)
1496{
1497 return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT;
1498}
1499EXPORT_SYMBOL(acpi_resources_are_enforced);
1500
1501
1502
1503
1504void acpi_os_delete_lock(acpi_spinlock handle)
1505{
1506 ACPI_FREE(handle);
1507}
1508
1509
1510
1511
1512
1513
1514
1515acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
1516{
1517 acpi_cpu_flags flags;
1518 spin_lock_irqsave(lockp, flags);
1519 return flags;
1520}
1521
1522
1523
1524
1525
1526void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)
1527{
1528 spin_unlock_irqrestore(lockp, flags);
1529}
1530
1531#ifndef ACPI_USE_LOCAL_CACHE
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548acpi_status
1549acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
1550{
1551 *cache = kmem_cache_create(name, size, 0, 0, NULL);
1552 if (*cache == NULL)
1553 return AE_ERROR;
1554 else
1555 return AE_OK;
1556}
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570acpi_status acpi_os_purge_cache(acpi_cache_t * cache)
1571{
1572 kmem_cache_shrink(cache);
1573 return (AE_OK);
1574}
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589acpi_status acpi_os_delete_cache(acpi_cache_t * cache)
1590{
1591 kmem_cache_destroy(cache);
1592 return (AE_OK);
1593}
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
1610{
1611 kmem_cache_free(cache, object);
1612 return (AE_OK);
1613}
1614#endif
1615
1616static int __init acpi_no_static_ssdt_setup(char *s)
1617{
1618 acpi_gbl_disable_ssdt_table_install = TRUE;
1619 pr_info("ACPI: static SSDT installation disabled\n");
1620
1621 return 0;
1622}
1623
1624early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup);
1625
1626static int __init acpi_disable_return_repair(char *s)
1627{
1628 printk(KERN_NOTICE PREFIX
1629 "ACPI: Predefined validation mechanism disabled\n");
1630 acpi_gbl_disable_auto_repair = TRUE;
1631
1632 return 1;
1633}
1634
1635__setup("acpica_no_return_repair", acpi_disable_return_repair);
1636
1637acpi_status __init acpi_os_initialize(void)
1638{
1639 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
1640 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
1641 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block);
1642 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block);
1643 if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) {
1644
1645
1646
1647
1648 int rv;
1649
1650 rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register);
1651 pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv);
1652 }
1653 acpi_os_initialized = true;
1654
1655 return AE_OK;
1656}
1657
1658acpi_status __init acpi_os_initialize1(void)
1659{
1660 kacpid_wq = alloc_workqueue("kacpid", 0, 1);
1661 kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1);
1662 kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0);
1663 BUG_ON(!kacpid_wq);
1664 BUG_ON(!kacpi_notify_wq);
1665 BUG_ON(!kacpi_hotplug_wq);
1666 acpi_osi_init();
1667 return AE_OK;
1668}
1669
1670acpi_status acpi_os_terminate(void)
1671{
1672 if (acpi_irq_handler) {
1673 acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt,
1674 acpi_irq_handler);
1675 }
1676
1677 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block);
1678 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block);
1679 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
1680 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
1681 if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER)
1682 acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register);
1683
1684 destroy_workqueue(kacpid_wq);
1685 destroy_workqueue(kacpi_notify_wq);
1686 destroy_workqueue(kacpi_hotplug_wq);
1687
1688 return AE_OK;
1689}
1690
1691acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control,
1692 u32 pm1b_control)
1693{
1694 int rc = 0;
1695 if (__acpi_os_prepare_sleep)
1696 rc = __acpi_os_prepare_sleep(sleep_state,
1697 pm1a_control, pm1b_control);
1698 if (rc < 0)
1699 return AE_ERROR;
1700 else if (rc > 0)
1701 return AE_CTRL_SKIP;
1702
1703 return AE_OK;
1704}
1705
1706void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state,
1707 u32 pm1a_ctrl, u32 pm1b_ctrl))
1708{
1709 __acpi_os_prepare_sleep = func;
1710}
1711
1712acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a,
1713 u32 val_b)
1714{
1715 int rc = 0;
1716 if (__acpi_os_prepare_extended_sleep)
1717 rc = __acpi_os_prepare_extended_sleep(sleep_state,
1718 val_a, val_b);
1719 if (rc < 0)
1720 return AE_ERROR;
1721 else if (rc > 0)
1722 return AE_CTRL_SKIP;
1723
1724 return AE_OK;
1725}
1726
1727void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state,
1728 u32 val_a, u32 val_b))
1729{
1730 __acpi_os_prepare_extended_sleep = func;
1731}
1732