xref: /freebsd/sys/dev/acpica/acpivar.h (revision d9f0ce31900a48d1a2bfc1c8c86f79d1e831451a)
1 /*-
2  * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
3  * Copyright (c) 2000 Michael Smith <msmith@freebsd.org>
4  * Copyright (c) 2000 BSDi
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  *
28  * $FreeBSD$
29  */
30 
31 #ifndef _ACPIVAR_H_
32 #define _ACPIVAR_H_
33 
34 #ifdef _KERNEL
35 
36 #include "acpi_if.h"
37 #include "bus_if.h"
38 #include <sys/eventhandler.h>
39 #include <sys/ktr.h>
40 #include <sys/lock.h>
41 #include <sys/mutex.h>
42 #include <sys/selinfo.h>
43 #include <sys/sx.h>
44 #include <sys/sysctl.h>
45 
46 #include <machine/bus.h>
47 #include <machine/resource.h>
48 
49 struct apm_clone_data;
50 struct acpi_softc {
51     device_t		acpi_dev;
52     struct cdev		*acpi_dev_t;
53 
54     int			acpi_enabled;
55     int			acpi_sstate;
56     int			acpi_sleep_disabled;
57     int			acpi_resources_reserved;
58 
59     struct sysctl_ctx_list acpi_sysctl_ctx;
60     struct sysctl_oid	*acpi_sysctl_tree;
61     int			acpi_power_button_sx;
62     int			acpi_sleep_button_sx;
63     int			acpi_lid_switch_sx;
64 
65     int			acpi_standby_sx;
66     int			acpi_suspend_sx;
67 
68     int			acpi_sleep_delay;
69     int			acpi_s4bios;
70     int			acpi_do_disable;
71     int			acpi_verbose;
72     int			acpi_handle_reboot;
73 
74     vm_offset_t		acpi_wakeaddr;
75     vm_paddr_t		acpi_wakephys;
76 
77     int			acpi_next_sstate;	/* Next suspend Sx state. */
78     struct apm_clone_data *acpi_clone;		/* Pseudo-dev for devd(8). */
79     STAILQ_HEAD(,apm_clone_data) apm_cdevs;	/* All apm/apmctl/acpi cdevs. */
80     struct callout	susp_force_to;		/* Force suspend if no acks. */
81 };
82 
83 struct acpi_device {
84     /* ACPI ivars */
85     ACPI_HANDLE			ad_handle;
86     void			*ad_private;
87     int				ad_flags;
88 
89     /* Resources */
90     struct resource_list	ad_rl;
91 };
92 
93 /* Track device (/dev/{apm,apmctl} and /dev/acpi) notification status. */
94 struct apm_clone_data {
95     STAILQ_ENTRY(apm_clone_data) entries;
96     struct cdev 	*cdev;
97     int			flags;
98 #define	ACPI_EVF_NONE	0	/* /dev/apm semantics */
99 #define	ACPI_EVF_DEVD	1	/* /dev/acpi is handled via devd(8) */
100 #define	ACPI_EVF_WRITE	2	/* Device instance is opened writable. */
101     int			notify_status;
102 #define	APM_EV_NONE	0	/* Device not yet aware of pending sleep. */
103 #define	APM_EV_NOTIFIED	1	/* Device saw next sleep state. */
104 #define	APM_EV_ACKED	2	/* Device agreed sleep can occur. */
105     struct acpi_softc	*acpi_sc;
106     struct selinfo	sel_read;
107 };
108 
109 #define ACPI_PRW_MAX_POWERRES	8
110 
111 struct acpi_prw_data {
112     ACPI_HANDLE		gpe_handle;
113     int			gpe_bit;
114     int			lowest_wake;
115     ACPI_OBJECT		power_res[ACPI_PRW_MAX_POWERRES];
116     int			power_res_count;
117 };
118 
119 /* Flags for each device defined in the AML namespace. */
120 #define ACPI_FLAG_WAKE_ENABLED	0x1
121 
122 /* Macros for extracting parts of a PCI address from an _ADR value. */
123 #define	ACPI_ADR_PCI_SLOT(adr)	(((adr) & 0xffff0000) >> 16)
124 #define	ACPI_ADR_PCI_FUNC(adr)	((adr) & 0xffff)
125 
126 /*
127  * Entry points to ACPI from above are global functions defined in this
128  * file, sysctls, and I/O on the control device.  Entry points from below
129  * are interrupts (the SCI), notifies, task queue threads, and the thermal
130  * zone polling thread.
131  *
132  * ACPI tables and global shared data are protected by a global lock
133  * (acpi_mutex).
134  *
135  * Each ACPI device can have its own driver-specific mutex for protecting
136  * shared access to local data.  The ACPI_LOCK macros handle mutexes.
137  *
138  * Drivers that need to serialize access to functions (e.g., to route
139  * interrupts, get/set control paths, etc.) should use the sx lock macros
140  * (ACPI_SERIAL).
141  *
142  * ACPI-CA handles its own locking and should not be called with locks held.
143  *
144  * The most complicated path is:
145  *     GPE -> EC runs _Qxx -> _Qxx reads EC space -> GPE
146  */
147 extern struct mtx			acpi_mutex;
148 #define ACPI_LOCK(sys)			mtx_lock(&sys##_mutex)
149 #define ACPI_UNLOCK(sys)		mtx_unlock(&sys##_mutex)
150 #define ACPI_LOCK_ASSERT(sys)		mtx_assert(&sys##_mutex, MA_OWNED);
151 #define ACPI_LOCK_DECL(sys, name)				\
152 	static struct mtx sys##_mutex;				\
153 	MTX_SYSINIT(sys##_mutex, &sys##_mutex, name, MTX_DEF)
154 #define ACPI_SERIAL_BEGIN(sys)		sx_xlock(&sys##_sxlock)
155 #define ACPI_SERIAL_END(sys)		sx_xunlock(&sys##_sxlock)
156 #define ACPI_SERIAL_ASSERT(sys)		sx_assert(&sys##_sxlock, SX_XLOCKED);
157 #define ACPI_SERIAL_DECL(sys, name)				\
158 	static struct sx sys##_sxlock;				\
159 	SX_SYSINIT(sys##_sxlock, &sys##_sxlock, name)
160 
161 /*
162  * ACPI CA does not define layers for non-ACPI CA drivers.
163  * We define some here within the range provided.
164  */
165 #define	ACPI_AC_ADAPTER		0x00010000
166 #define	ACPI_BATTERY		0x00020000
167 #define	ACPI_BUS		0x00040000
168 #define	ACPI_BUTTON		0x00080000
169 #define	ACPI_EC			0x00100000
170 #define	ACPI_FAN		0x00200000
171 #define	ACPI_POWERRES		0x00400000
172 #define	ACPI_PROCESSOR		0x00800000
173 #define	ACPI_THERMAL		0x01000000
174 #define	ACPI_TIMER		0x02000000
175 #define	ACPI_OEM		0x04000000
176 
177 /*
178  * Constants for different interrupt models used with acpi_SetIntrModel().
179  */
180 #define	ACPI_INTR_PIC		0
181 #define	ACPI_INTR_APIC		1
182 #define	ACPI_INTR_SAPIC		2
183 
184 /*
185  * Various features and capabilities for the acpi_get_features() method.
186  * In particular, these are used for the ACPI 3.0 _PDC and _OSC methods.
187  * See the Intel document titled "Intel Processor Vendor-Specific ACPI",
188  * number 302223-007.
189  */
190 #define	ACPI_CAP_PERF_MSRS	(1 << 0)  /* Intel SpeedStep PERF_CTL MSRs */
191 #define	ACPI_CAP_C1_IO_HALT	(1 << 1)  /* Intel C1 "IO then halt" sequence */
192 #define	ACPI_CAP_THR_MSRS	(1 << 2)  /* Intel OnDemand throttling MSRs */
193 #define	ACPI_CAP_SMP_SAME	(1 << 3)  /* MP C1, Px, and Tx (all the same) */
194 #define	ACPI_CAP_SMP_SAME_C3	(1 << 4)  /* MP C2 and C3 (all the same) */
195 #define	ACPI_CAP_SMP_DIFF_PX	(1 << 5)  /* MP Px (different, using _PSD) */
196 #define	ACPI_CAP_SMP_DIFF_CX	(1 << 6)  /* MP Cx (different, using _CSD) */
197 #define	ACPI_CAP_SMP_DIFF_TX	(1 << 7)  /* MP Tx (different, using _TSD) */
198 #define	ACPI_CAP_SMP_C1_NATIVE	(1 << 8)  /* MP C1 support other than halt */
199 #define	ACPI_CAP_SMP_C3_NATIVE	(1 << 9)  /* MP C2 and C3 support */
200 #define	ACPI_CAP_PX_HW_COORD	(1 << 11) /* Intel P-state HW coordination */
201 #define	ACPI_CAP_INTR_CPPC	(1 << 12) /* Native Interrupt Handling for
202 	     Collaborative Processor Performance Control notifications */
203 #define	ACPI_CAP_HW_DUTY_C	(1 << 13) /* Hardware Duty Cycling */
204 
205 /*
206  * Quirk flags.
207  *
208  * ACPI_Q_BROKEN: Disables all ACPI support.
209  * ACPI_Q_TIMER: Disables support for the ACPI timer.
210  * ACPI_Q_MADT_IRQ0: Specifies that ISA IRQ 0 is wired up to pin 0 of the
211  *	first APIC and that the MADT should force that by ignoring the PC-AT
212  *	compatible flag and ignoring overrides that redirect IRQ 0 to pin 2.
213  */
214 extern int	acpi_quirks;
215 #define ACPI_Q_OK		0
216 #define ACPI_Q_BROKEN		(1 << 0)
217 #define ACPI_Q_TIMER		(1 << 1)
218 #define ACPI_Q_MADT_IRQ0	(1 << 2)
219 
220 /*
221  * Note that the low ivar values are reserved to provide
222  * interface compatibility with ISA drivers which can also
223  * attach to ACPI.
224  */
225 #define ACPI_IVAR_HANDLE	0x100
226 #define ACPI_IVAR_UNUSED	0x101	/* Unused/reserved. */
227 #define ACPI_IVAR_PRIVATE	0x102
228 #define ACPI_IVAR_FLAGS		0x103
229 
230 /*
231  * Accessor functions for our ivars.  Default value for BUS_READ_IVAR is
232  * (type) 0.  The <sys/bus.h> accessor functions don't check return values.
233  */
234 #define __ACPI_BUS_ACCESSOR(varp, var, ivarp, ivar, type)	\
235 								\
236 static __inline type varp ## _get_ ## var(device_t dev)		\
237 {								\
238     uintptr_t v = 0;						\
239     BUS_READ_IVAR(device_get_parent(dev), dev,			\
240 	ivarp ## _IVAR_ ## ivar, &v);				\
241     return ((type) v);						\
242 }								\
243 								\
244 static __inline void varp ## _set_ ## var(device_t dev, type t)	\
245 {								\
246     uintptr_t v = (uintptr_t) t;				\
247     BUS_WRITE_IVAR(device_get_parent(dev), dev,			\
248 	ivarp ## _IVAR_ ## ivar, v);				\
249 }
250 
251 __ACPI_BUS_ACCESSOR(acpi, handle, ACPI, HANDLE, ACPI_HANDLE)
252 __ACPI_BUS_ACCESSOR(acpi, private, ACPI, PRIVATE, void *)
253 __ACPI_BUS_ACCESSOR(acpi, flags, ACPI, FLAGS, int)
254 
255 void acpi_fake_objhandler(ACPI_HANDLE h, void *data);
256 static __inline device_t
257 acpi_get_device(ACPI_HANDLE handle)
258 {
259     void *dev = NULL;
260     AcpiGetData(handle, acpi_fake_objhandler, &dev);
261     return ((device_t)dev);
262 }
263 
264 static __inline ACPI_OBJECT_TYPE
265 acpi_get_type(device_t dev)
266 {
267     ACPI_HANDLE		h;
268     ACPI_OBJECT_TYPE	t;
269 
270     if ((h = acpi_get_handle(dev)) == NULL)
271 	return (ACPI_TYPE_NOT_FOUND);
272     if (ACPI_FAILURE(AcpiGetType(h, &t)))
273 	return (ACPI_TYPE_NOT_FOUND);
274     return (t);
275 }
276 
277 /* Find the difference between two PM tick counts. */
278 static __inline uint32_t
279 acpi_TimerDelta(uint32_t end, uint32_t start)
280 {
281 
282 	if (end < start && (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER) == 0)
283 		end |= 0x01000000;
284 	return (end - start);
285 }
286 
287 #ifdef ACPI_DEBUGGER
288 void		acpi_EnterDebugger(void);
289 #endif
290 
291 #ifdef ACPI_DEBUG
292 #include <sys/cons.h>
293 #define STEP(x)		do {printf x, printf("\n"); cngetc();} while (0)
294 #else
295 #define STEP(x)
296 #endif
297 
298 #define ACPI_VPRINT(dev, acpi_sc, x...) do {			\
299     if (acpi_get_verbose(acpi_sc))				\
300 	device_printf(dev, x);					\
301 } while (0)
302 
303 /* Values for the device _STA (status) method. */
304 #define ACPI_STA_PRESENT	(1 << 0)
305 #define ACPI_STA_ENABLED	(1 << 1)
306 #define ACPI_STA_SHOW_IN_UI	(1 << 2)
307 #define ACPI_STA_FUNCTIONAL	(1 << 3)
308 #define ACPI_STA_BATT_PRESENT	(1 << 4)
309 
310 #define ACPI_DEVINFO_PRESENT(x, flags)					\
311 	(((x) & (flags)) == (flags))
312 #define ACPI_DEVICE_PRESENT(x)						\
313 	ACPI_DEVINFO_PRESENT(x, ACPI_STA_PRESENT | ACPI_STA_FUNCTIONAL)
314 #define ACPI_BATTERY_PRESENT(x)						\
315 	ACPI_DEVINFO_PRESENT(x, ACPI_STA_PRESENT | ACPI_STA_FUNCTIONAL | \
316 	    ACPI_STA_BATT_PRESENT)
317 
318 /* Callback function type for walking subtables within a table. */
319 typedef void acpi_subtable_handler(ACPI_SUBTABLE_HEADER *, void *);
320 
321 BOOLEAN		acpi_DeviceIsPresent(device_t dev);
322 BOOLEAN		acpi_BatteryIsPresent(device_t dev);
323 ACPI_STATUS	acpi_GetHandleInScope(ACPI_HANDLE parent, char *path,
324 		    ACPI_HANDLE *result);
325 ACPI_BUFFER	*acpi_AllocBuffer(int size);
326 ACPI_STATUS	acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp,
327 		    UINT32 *number);
328 ACPI_STATUS	acpi_GetInteger(ACPI_HANDLE handle, char *path,
329 		    UINT32 *number);
330 ACPI_STATUS	acpi_SetInteger(ACPI_HANDLE handle, char *path,
331 		    UINT32 number);
332 ACPI_STATUS	acpi_ForeachPackageObject(ACPI_OBJECT *obj,
333 		    void (*func)(ACPI_OBJECT *comp, void *arg), void *arg);
334 ACPI_STATUS	acpi_FindIndexedResource(ACPI_BUFFER *buf, int index,
335 		    ACPI_RESOURCE **resp);
336 ACPI_STATUS	acpi_AppendBufferResource(ACPI_BUFFER *buf,
337 		    ACPI_RESOURCE *res);
338 ACPI_STATUS	acpi_OverrideInterruptLevel(UINT32 InterruptNumber);
339 ACPI_STATUS	acpi_SetIntrModel(int model);
340 int		acpi_ReqSleepState(struct acpi_softc *sc, int state);
341 int		acpi_AckSleepState(struct apm_clone_data *clone, int error);
342 ACPI_STATUS	acpi_SetSleepState(struct acpi_softc *sc, int state);
343 int		acpi_wake_set_enable(device_t dev, int enable);
344 int		acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw);
345 ACPI_STATUS	acpi_Startup(void);
346 void		acpi_UserNotify(const char *subsystem, ACPI_HANDLE h,
347 		    uint8_t notify);
348 int		acpi_bus_alloc_gas(device_t dev, int *type, int *rid,
349 		    ACPI_GENERIC_ADDRESS *gas, struct resource **res,
350 		    u_int flags);
351 void		acpi_walk_subtables(void *first, void *end,
352 		    acpi_subtable_handler *handler, void *arg);
353 BOOLEAN		acpi_MatchHid(ACPI_HANDLE h, const char *hid);
354 
355 struct acpi_parse_resource_set {
356     void	(*set_init)(device_t dev, void *arg, void **context);
357     void	(*set_done)(device_t dev, void *context);
358     void	(*set_ioport)(device_t dev, void *context, uint64_t base,
359 		    uint64_t length);
360     void	(*set_iorange)(device_t dev, void *context, uint64_t low,
361 		    uint64_t high, uint64_t length, uint64_t align);
362     void	(*set_memory)(device_t dev, void *context, uint64_t base,
363 		    uint64_t length);
364     void	(*set_memoryrange)(device_t dev, void *context, uint64_t low,
365 		    uint64_t high, uint64_t length, uint64_t align);
366     void	(*set_irq)(device_t dev, void *context, uint8_t *irq,
367 		    int count, int trig, int pol);
368     void	(*set_ext_irq)(device_t dev, void *context, uint32_t *irq,
369 		    int count, int trig, int pol);
370     void	(*set_drq)(device_t dev, void *context, uint8_t *drq,
371 		    int count);
372     void	(*set_start_dependent)(device_t dev, void *context,
373 		    int preference);
374     void	(*set_end_dependent)(device_t dev, void *context);
375 };
376 
377 extern struct	acpi_parse_resource_set acpi_res_parse_set;
378 
379 int		acpi_identify(void);
380 void		acpi_config_intr(device_t dev, ACPI_RESOURCE *res);
381 ACPI_STATUS	acpi_lookup_irq_resource(device_t dev, int rid,
382 		    struct resource *res, ACPI_RESOURCE *acpi_res);
383 ACPI_STATUS	acpi_parse_resources(device_t dev, ACPI_HANDLE handle,
384 		    struct acpi_parse_resource_set *set, void *arg);
385 struct resource *acpi_alloc_sysres(device_t child, int type, int *rid,
386 		    rman_res_t start, rman_res_t end, rman_res_t count,
387 		    u_int flags);
388 
389 /* ACPI event handling */
390 UINT32		acpi_event_power_button_sleep(void *context);
391 UINT32		acpi_event_power_button_wake(void *context);
392 UINT32		acpi_event_sleep_button_sleep(void *context);
393 UINT32		acpi_event_sleep_button_wake(void *context);
394 
395 #define ACPI_EVENT_PRI_FIRST      0
396 #define ACPI_EVENT_PRI_DEFAULT    10000
397 #define ACPI_EVENT_PRI_LAST       20000
398 
399 typedef void (*acpi_event_handler_t)(void *, int);
400 
401 EVENTHANDLER_DECLARE(acpi_sleep_event, acpi_event_handler_t);
402 EVENTHANDLER_DECLARE(acpi_wakeup_event, acpi_event_handler_t);
403 
404 /* Device power control. */
405 ACPI_STATUS	acpi_pwr_wake_enable(ACPI_HANDLE consumer, int enable);
406 ACPI_STATUS	acpi_pwr_switch_consumer(ACPI_HANDLE consumer, int state);
407 int		acpi_device_pwr_for_sleep(device_t bus, device_t dev,
408 		    int *dstate);
409 
410 /* APM emulation */
411 void		acpi_apm_init(struct acpi_softc *);
412 
413 /* Misc. */
414 static __inline struct acpi_softc *
415 acpi_device_get_parent_softc(device_t child)
416 {
417     device_t	parent;
418 
419     parent = device_get_parent(child);
420     if (parent == NULL)
421 	return (NULL);
422     return (device_get_softc(parent));
423 }
424 
425 static __inline int
426 acpi_get_verbose(struct acpi_softc *sc)
427 {
428     if (sc)
429 	return (sc->acpi_verbose);
430     return (0);
431 }
432 
433 char		*acpi_name(ACPI_HANDLE handle);
434 int		acpi_avoid(ACPI_HANDLE handle);
435 int		acpi_disabled(char *subsys);
436 int		acpi_machdep_init(device_t dev);
437 void		acpi_install_wakeup_handler(struct acpi_softc *sc);
438 int		acpi_sleep_machdep(struct acpi_softc *sc, int state);
439 int		acpi_wakeup_machdep(struct acpi_softc *sc, int state,
440 		    int sleep_result, int intr_enabled);
441 int		acpi_table_quirks(int *quirks);
442 int		acpi_machdep_quirks(int *quirks);
443 
444 uint32_t	hpet_get_uid(device_t dev);
445 
446 /* Battery Abstraction. */
447 struct acpi_battinfo;
448 
449 int		acpi_battery_register(device_t dev);
450 int		acpi_battery_remove(device_t dev);
451 int		acpi_battery_get_units(void);
452 int		acpi_battery_get_info_expire(void);
453 int		acpi_battery_bst_valid(struct acpi_bst *bst);
454 int		acpi_battery_bif_valid(struct acpi_bif *bif);
455 int		acpi_battery_get_battinfo(device_t dev,
456 		    struct acpi_battinfo *info);
457 
458 /* Embedded controller. */
459 void		acpi_ec_ecdt_probe(device_t);
460 
461 /* AC adapter interface. */
462 int		acpi_acad_get_acline(int *);
463 
464 /* Package manipulation convenience functions. */
465 #define ACPI_PKG_VALID(pkg, size)				\
466     ((pkg) != NULL && (pkg)->Type == ACPI_TYPE_PACKAGE &&	\
467      (pkg)->Package.Count >= (size))
468 int		acpi_PkgInt(ACPI_OBJECT *res, int idx, UINT64 *dst);
469 int		acpi_PkgInt32(ACPI_OBJECT *res, int idx, uint32_t *dst);
470 int		acpi_PkgStr(ACPI_OBJECT *res, int idx, void *dst, size_t size);
471 int		acpi_PkgGas(device_t dev, ACPI_OBJECT *res, int idx, int *type,
472 		    int *rid, struct resource **dst, u_int flags);
473 int		acpi_PkgFFH_IntelCpu(ACPI_OBJECT *res, int idx, int *vendor,
474 		    int *class, uint64_t *address, int *accsize);
475 ACPI_HANDLE	acpi_GetReference(ACPI_HANDLE scope, ACPI_OBJECT *obj);
476 
477 /*
478  * Base level for BUS_ADD_CHILD.  Special devices are added at orders less
479  * than this, and normal devices at or above this level.  This keeps the
480  * probe order sorted so that things like sysresource are available before
481  * their children need them.
482  */
483 #define	ACPI_DEV_BASE_ORDER	100
484 
485 /* Default maximum number of tasks to enqueue. */
486 #ifndef ACPI_MAX_TASKS
487 #define	ACPI_MAX_TASKS		MAX(32, MAXCPU * 4)
488 #endif
489 
490 /* Default number of task queue threads to start. */
491 #ifndef ACPI_MAX_THREADS
492 #define ACPI_MAX_THREADS	3
493 #endif
494 
495 /* Use the device logging level for ktr(4). */
496 #define	KTR_ACPI		KTR_DEV
497 
498 SYSCTL_DECL(_debug_acpi);
499 
500 /*
501  * Map a PXM to a VM domain.
502  *
503  * Returns the VM domain ID if found, or -1 if not found / invalid.
504  */
505 extern	int acpi_map_pxm_to_vm_domainid(int pxm);
506 extern	int acpi_get_domain(device_t dev, device_t child, int *domain);
507 extern	int acpi_parse_pxm(device_t dev, int *domain);
508 
509 #endif /* _KERNEL */
510 #endif /* !_ACPIVAR_H_ */
511