2 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
3 * Copyright (c) 2000 Michael Smith <msmith@freebsd.org>
4 * Copyright (c) 2000 BSDi
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
38 #include <sys/_eventhandler.h>
44 #include <sys/mutex.h>
45 #include <sys/selinfo.h>
47 #include <sys/sysctl.h>
49 #include <machine/bus.h>
50 #include <machine/resource.h>
52 struct apm_clone_data;
55 struct cdev *acpi_dev_t;
59 int acpi_sleep_disabled;
60 int acpi_resources_reserved;
62 struct sysctl_ctx_list acpi_sysctl_ctx;
63 struct sysctl_oid *acpi_sysctl_tree;
64 int acpi_power_button_sx;
65 int acpi_sleep_button_sx;
66 int acpi_lid_switch_sx;
75 int acpi_handle_reboot;
77 vm_offset_t acpi_wakeaddr;
78 vm_paddr_t acpi_wakephys;
80 int acpi_next_sstate; /* Next suspend Sx state. */
81 struct apm_clone_data *acpi_clone; /* Pseudo-dev for devd(8). */
82 STAILQ_HEAD(,apm_clone_data) apm_cdevs; /* All apm/apmctl/acpi cdevs. */
83 struct callout susp_force_to; /* Force suspend if no acks. */
88 ACPI_HANDLE ad_handle;
94 struct resource_list ad_rl;
98 struct intr_map_data_acpi {
99 struct intr_map_data hdr;
107 /* Track device (/dev/{apm,apmctl} and /dev/acpi) notification status. */
108 struct apm_clone_data {
109 STAILQ_ENTRY(apm_clone_data) entries;
112 #define ACPI_EVF_NONE 0 /* /dev/apm semantics */
113 #define ACPI_EVF_DEVD 1 /* /dev/acpi is handled via devd(8) */
114 #define ACPI_EVF_WRITE 2 /* Device instance is opened writable. */
116 #define APM_EV_NONE 0 /* Device not yet aware of pending sleep. */
117 #define APM_EV_NOTIFIED 1 /* Device saw next sleep state. */
118 #define APM_EV_ACKED 2 /* Device agreed sleep can occur. */
119 struct acpi_softc *acpi_sc;
120 struct selinfo sel_read;
123 #define ACPI_PRW_MAX_POWERRES 8
125 struct acpi_prw_data {
126 ACPI_HANDLE gpe_handle;
129 ACPI_OBJECT power_res[ACPI_PRW_MAX_POWERRES];
133 /* Flags for each device defined in the AML namespace. */
134 #define ACPI_FLAG_WAKE_ENABLED 0x1
136 /* Macros for extracting parts of a PCI address from an _ADR value. */
137 #define ACPI_ADR_PCI_SLOT(adr) (((adr) & 0xffff0000) >> 16)
138 #define ACPI_ADR_PCI_FUNC(adr) ((adr) & 0xffff)
141 * Entry points to ACPI from above are global functions defined in this
142 * file, sysctls, and I/O on the control device. Entry points from below
143 * are interrupts (the SCI), notifies, task queue threads, and the thermal
144 * zone polling thread.
146 * ACPI tables and global shared data are protected by a global lock
149 * Each ACPI device can have its own driver-specific mutex for protecting
150 * shared access to local data. The ACPI_LOCK macros handle mutexes.
152 * Drivers that need to serialize access to functions (e.g., to route
153 * interrupts, get/set control paths, etc.) should use the sx lock macros
156 * ACPI-CA handles its own locking and should not be called with locks held.
158 * The most complicated path is:
159 * GPE -> EC runs _Qxx -> _Qxx reads EC space -> GPE
161 extern struct mtx acpi_mutex;
162 #define ACPI_LOCK(sys) mtx_lock(&sys##_mutex)
163 #define ACPI_UNLOCK(sys) mtx_unlock(&sys##_mutex)
164 #define ACPI_LOCK_ASSERT(sys) mtx_assert(&sys##_mutex, MA_OWNED);
165 #define ACPI_LOCK_DECL(sys, name) \
166 static struct mtx sys##_mutex; \
167 MTX_SYSINIT(sys##_mutex, &sys##_mutex, name, MTX_DEF)
168 #define ACPI_SERIAL_BEGIN(sys) sx_xlock(&sys##_sxlock)
169 #define ACPI_SERIAL_END(sys) sx_xunlock(&sys##_sxlock)
170 #define ACPI_SERIAL_ASSERT(sys) sx_assert(&sys##_sxlock, SX_XLOCKED);
171 #define ACPI_SERIAL_DECL(sys, name) \
172 static struct sx sys##_sxlock; \
173 SX_SYSINIT(sys##_sxlock, &sys##_sxlock, name)
176 * ACPI CA does not define layers for non-ACPI CA drivers.
177 * We define some here within the range provided.
179 #define ACPI_AC_ADAPTER 0x00010000
180 #define ACPI_BATTERY 0x00020000
181 #define ACPI_BUS 0x00040000
182 #define ACPI_BUTTON 0x00080000
183 #define ACPI_EC 0x00100000
184 #define ACPI_FAN 0x00200000
185 #define ACPI_POWERRES 0x00400000
186 #define ACPI_PROCESSOR 0x00800000
187 #define ACPI_THERMAL 0x01000000
188 #define ACPI_TIMER 0x02000000
189 #define ACPI_OEM 0x04000000
192 * Constants for different interrupt models used with acpi_SetIntrModel().
194 #define ACPI_INTR_PIC 0
195 #define ACPI_INTR_APIC 1
196 #define ACPI_INTR_SAPIC 2
199 * Various features and capabilities for the acpi_get_features() method.
200 * In particular, these are used for the ACPI 3.0 _PDC and _OSC methods.
201 * See the Intel document titled "Intel Processor Vendor-Specific ACPI",
204 #define ACPI_CAP_PERF_MSRS (1 << 0) /* Intel SpeedStep PERF_CTL MSRs */
205 #define ACPI_CAP_C1_IO_HALT (1 << 1) /* Intel C1 "IO then halt" sequence */
206 #define ACPI_CAP_THR_MSRS (1 << 2) /* Intel OnDemand throttling MSRs */
207 #define ACPI_CAP_SMP_SAME (1 << 3) /* MP C1, Px, and Tx (all the same) */
208 #define ACPI_CAP_SMP_SAME_C3 (1 << 4) /* MP C2 and C3 (all the same) */
209 #define ACPI_CAP_SMP_DIFF_PX (1 << 5) /* MP Px (different, using _PSD) */
210 #define ACPI_CAP_SMP_DIFF_CX (1 << 6) /* MP Cx (different, using _CSD) */
211 #define ACPI_CAP_SMP_DIFF_TX (1 << 7) /* MP Tx (different, using _TSD) */
212 #define ACPI_CAP_SMP_C1_NATIVE (1 << 8) /* MP C1 support other than halt */
213 #define ACPI_CAP_SMP_C3_NATIVE (1 << 9) /* MP C2 and C3 support */
214 #define ACPI_CAP_PX_HW_COORD (1 << 11) /* Intel P-state HW coordination */
215 #define ACPI_CAP_INTR_CPPC (1 << 12) /* Native Interrupt Handling for
216 Collaborative Processor Performance Control notifications */
217 #define ACPI_CAP_HW_DUTY_C (1 << 13) /* Hardware Duty Cycling */
222 * ACPI_Q_BROKEN: Disables all ACPI support.
223 * ACPI_Q_TIMER: Disables support for the ACPI timer.
224 * ACPI_Q_MADT_IRQ0: Specifies that ISA IRQ 0 is wired up to pin 0 of the
225 * first APIC and that the MADT should force that by ignoring the PC-AT
226 * compatible flag and ignoring overrides that redirect IRQ 0 to pin 2.
228 extern int acpi_quirks;
230 #define ACPI_Q_BROKEN (1 << 0)
231 #define ACPI_Q_TIMER (1 << 1)
232 #define ACPI_Q_MADT_IRQ0 (1 << 2)
235 * Plug and play information for device matching. Matching table format
236 * is compatible with ids parameter of ACPI_ID_PROBE bus method.
238 * XXX: While ACPI_ID_PROBE matches against _HID and all _CIDs, current
239 * acpi_pnpinfo_str() exports only _HID and first _CID. That means second
240 * and further _CIDs should be added to both acpi_pnpinfo_str() and
241 * ACPICOMPAT_PNP_INFO if device matching against them is required.
243 #define ACPICOMPAT_PNP_INFO(t, busname) \
244 MODULE_PNP_INFO("Z:_HID", busname, t##hid, t, nitems(t)-1); \
245 MODULE_PNP_INFO("Z:_CID", busname, t##cid, t, nitems(t)-1);
246 #define ACPI_PNP_INFO(t) ACPICOMPAT_PNP_INFO(t, acpi)
249 * Note that the low ivar values are reserved to provide
250 * interface compatibility with ISA drivers which can also
253 #define ACPI_IVAR_HANDLE 0x100
254 #define ACPI_IVAR_UNUSED 0x101 /* Unused/reserved. */
255 #define ACPI_IVAR_PRIVATE 0x102
256 #define ACPI_IVAR_FLAGS 0x103
259 * Accessor functions for our ivars. Default value for BUS_READ_IVAR is
260 * (type) 0. The <sys/bus.h> accessor functions don't check return values.
262 #define __ACPI_BUS_ACCESSOR(varp, var, ivarp, ivar, type) \
264 static __inline type varp ## _get_ ## var(device_t dev) \
267 BUS_READ_IVAR(device_get_parent(dev), dev, \
268 ivarp ## _IVAR_ ## ivar, &v); \
272 static __inline void varp ## _set_ ## var(device_t dev, type t) \
274 uintptr_t v = (uintptr_t) t; \
275 BUS_WRITE_IVAR(device_get_parent(dev), dev, \
276 ivarp ## _IVAR_ ## ivar, v); \
279 __ACPI_BUS_ACCESSOR(acpi, handle, ACPI, HANDLE, ACPI_HANDLE)
280 __ACPI_BUS_ACCESSOR(acpi, private, ACPI, PRIVATE, void *)
281 __ACPI_BUS_ACCESSOR(acpi, flags, ACPI, FLAGS, int)
283 void acpi_fake_objhandler(ACPI_HANDLE h, void *data);
284 static __inline device_t
285 acpi_get_device(ACPI_HANDLE handle)
288 AcpiGetData(handle, acpi_fake_objhandler, &dev);
289 return ((device_t)dev);
292 static __inline ACPI_OBJECT_TYPE
293 acpi_get_type(device_t dev)
298 if ((h = acpi_get_handle(dev)) == NULL)
299 return (ACPI_TYPE_NOT_FOUND);
300 if (ACPI_FAILURE(AcpiGetType(h, &t)))
301 return (ACPI_TYPE_NOT_FOUND);
305 /* Find the difference between two PM tick counts. */
306 static __inline uint32_t
307 acpi_TimerDelta(uint32_t end, uint32_t start)
310 if (end < start && (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER) == 0)
312 return (end - start);
316 void acpi_EnterDebugger(void);
320 #include <sys/cons.h>
321 #define STEP(x) do {printf x, printf("\n"); cngetc();} while (0)
326 #define ACPI_VPRINT(dev, acpi_sc, x...) do { \
327 if (acpi_get_verbose(acpi_sc)) \
328 device_printf(dev, x); \
331 /* Values for the first status word returned by _OSC. */
332 #define ACPI_OSC_FAILURE (1 << 1)
333 #define ACPI_OSC_BAD_UUID (1 << 2)
334 #define ACPI_OSC_BAD_REVISION (1 << 3)
335 #define ACPI_OSC_CAPS_MASKED (1 << 4)
337 #define ACPI_DEVINFO_PRESENT(x, flags) \
338 (((x) & (flags)) == (flags))
339 #define ACPI_DEVICE_PRESENT(x) \
340 ACPI_DEVINFO_PRESENT(x, ACPI_STA_DEVICE_PRESENT | \
341 ACPI_STA_DEVICE_FUNCTIONING)
342 #define ACPI_BATTERY_PRESENT(x) \
343 ACPI_DEVINFO_PRESENT(x, ACPI_STA_DEVICE_PRESENT | \
344 ACPI_STA_DEVICE_FUNCTIONING | ACPI_STA_BATTERY_PRESENT)
346 /* Callback function type for walking subtables within a table. */
347 typedef void acpi_subtable_handler(ACPI_SUBTABLE_HEADER *, void *);
349 BOOLEAN acpi_DeviceIsPresent(device_t dev);
350 BOOLEAN acpi_BatteryIsPresent(device_t dev);
351 ACPI_STATUS acpi_GetHandleInScope(ACPI_HANDLE parent, char *path,
352 ACPI_HANDLE *result);
353 ACPI_BUFFER *acpi_AllocBuffer(int size);
354 ACPI_STATUS acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp,
356 ACPI_STATUS acpi_GetInteger(ACPI_HANDLE handle, char *path,
358 ACPI_STATUS acpi_SetInteger(ACPI_HANDLE handle, char *path,
360 ACPI_STATUS acpi_ForeachPackageObject(ACPI_OBJECT *obj,
361 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg);
362 ACPI_STATUS acpi_FindIndexedResource(ACPI_BUFFER *buf, int index,
363 ACPI_RESOURCE **resp);
364 ACPI_STATUS acpi_AppendBufferResource(ACPI_BUFFER *buf,
366 UINT64 acpi_DSMQuery(ACPI_HANDLE h, const uint8_t *uuid,
368 ACPI_STATUS acpi_EvaluateDSM(ACPI_HANDLE handle, const uint8_t *uuid,
369 int revision, UINT64 function, ACPI_OBJECT *package,
370 ACPI_BUFFER *out_buf);
371 ACPI_STATUS acpi_EvaluateDSMTyped(ACPI_HANDLE handle,
372 const uint8_t *uuid, int revision, UINT64 function,
373 ACPI_OBJECT *package, ACPI_BUFFER *out_buf,
374 ACPI_OBJECT_TYPE type);
375 ACPI_STATUS acpi_EvaluateOSC(ACPI_HANDLE handle, uint8_t *uuid,
376 int revision, int count, uint32_t *caps_in,
377 uint32_t *caps_out, bool query);
378 ACPI_STATUS acpi_OverrideInterruptLevel(UINT32 InterruptNumber);
379 ACPI_STATUS acpi_SetIntrModel(int model);
380 int acpi_ReqSleepState(struct acpi_softc *sc, int state);
381 int acpi_AckSleepState(struct apm_clone_data *clone, int error);
382 ACPI_STATUS acpi_SetSleepState(struct acpi_softc *sc, int state);
383 int acpi_wake_set_enable(device_t dev, int enable);
384 int acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw);
385 ACPI_STATUS acpi_Startup(void);
386 void acpi_UserNotify(const char *subsystem, ACPI_HANDLE h,
388 int acpi_bus_alloc_gas(device_t dev, int *type, int *rid,
389 ACPI_GENERIC_ADDRESS *gas, struct resource **res,
391 void acpi_walk_subtables(void *first, void *end,
392 acpi_subtable_handler *handler, void *arg);
393 BOOLEAN acpi_has_hid(ACPI_HANDLE handle);
394 int acpi_MatchHid(ACPI_HANDLE h, const char *hid);
395 #define ACPI_MATCHHID_NOMATCH 0
396 #define ACPI_MATCHHID_HID 1
397 #define ACPI_MATCHHID_CID 2
399 struct acpi_parse_resource_set {
400 void (*set_init)(device_t dev, void *arg, void **context);
401 void (*set_done)(device_t dev, void *context);
402 void (*set_ioport)(device_t dev, void *context, uint64_t base,
404 void (*set_iorange)(device_t dev, void *context, uint64_t low,
405 uint64_t high, uint64_t length, uint64_t align);
406 void (*set_memory)(device_t dev, void *context, uint64_t base,
408 void (*set_memoryrange)(device_t dev, void *context, uint64_t low,
409 uint64_t high, uint64_t length, uint64_t align);
410 void (*set_irq)(device_t dev, void *context, uint8_t *irq,
411 int count, int trig, int pol);
412 void (*set_ext_irq)(device_t dev, void *context, uint32_t *irq,
413 int count, int trig, int pol);
414 void (*set_drq)(device_t dev, void *context, uint8_t *drq,
416 void (*set_start_dependent)(device_t dev, void *context,
418 void (*set_end_dependent)(device_t dev, void *context);
421 extern struct acpi_parse_resource_set acpi_res_parse_set;
423 int acpi_identify(void);
424 void acpi_config_intr(device_t dev, ACPI_RESOURCE *res);
426 int acpi_map_intr(device_t dev, u_int irq, ACPI_HANDLE handle);
428 ACPI_STATUS acpi_lookup_irq_resource(device_t dev, int rid,
429 struct resource *res, ACPI_RESOURCE *acpi_res);
430 ACPI_STATUS acpi_parse_resources(device_t dev, ACPI_HANDLE handle,
431 struct acpi_parse_resource_set *set, void *arg);
432 struct resource *acpi_alloc_sysres(device_t child, int type, int *rid,
433 rman_res_t start, rman_res_t end, rman_res_t count,
436 /* ACPI event handling */
437 UINT32 acpi_event_power_button_sleep(void *context);
438 UINT32 acpi_event_power_button_wake(void *context);
439 UINT32 acpi_event_sleep_button_sleep(void *context);
440 UINT32 acpi_event_sleep_button_wake(void *context);
442 #define ACPI_EVENT_PRI_FIRST 0
443 #define ACPI_EVENT_PRI_DEFAULT 10000
444 #define ACPI_EVENT_PRI_LAST 20000
446 typedef void (*acpi_event_handler_t)(void *, int);
448 EVENTHANDLER_DECLARE(acpi_sleep_event, acpi_event_handler_t);
449 EVENTHANDLER_DECLARE(acpi_wakeup_event, acpi_event_handler_t);
450 EVENTHANDLER_DECLARE(acpi_acad_event, acpi_event_handler_t);
451 EVENTHANDLER_DECLARE(acpi_video_event, acpi_event_handler_t);
453 /* Device power control. */
454 ACPI_STATUS acpi_pwr_wake_enable(ACPI_HANDLE consumer, int enable);
455 ACPI_STATUS acpi_pwr_switch_consumer(ACPI_HANDLE consumer, int state);
456 int acpi_device_pwr_for_sleep(device_t bus, device_t dev,
458 int acpi_set_powerstate(device_t child, int state);
461 void acpi_apm_init(struct acpi_softc *);
464 static __inline struct acpi_softc *
465 acpi_device_get_parent_softc(device_t child)
469 parent = device_get_parent(child);
472 return (device_get_softc(parent));
476 acpi_get_verbose(struct acpi_softc *sc)
479 return (sc->acpi_verbose);
483 char *acpi_name(ACPI_HANDLE handle);
484 int acpi_avoid(ACPI_HANDLE handle);
485 int acpi_disabled(char *subsys);
486 int acpi_machdep_init(device_t dev);
487 void acpi_install_wakeup_handler(struct acpi_softc *sc);
488 int acpi_sleep_machdep(struct acpi_softc *sc, int state);
489 int acpi_wakeup_machdep(struct acpi_softc *sc, int state,
490 int sleep_result, int intr_enabled);
491 int acpi_table_quirks(int *quirks);
492 int acpi_machdep_quirks(int *quirks);
493 int acpi_pnpinfo_str(ACPI_HANDLE handle, char *buf, size_t buflen);
495 uint32_t hpet_get_uid(device_t dev);
497 /* Battery Abstraction. */
498 struct acpi_battinfo;
500 int acpi_battery_register(device_t dev);
501 int acpi_battery_remove(device_t dev);
502 int acpi_battery_get_units(void);
503 int acpi_battery_get_info_expire(void);
504 int acpi_battery_bst_valid(struct acpi_bst *bst);
505 int acpi_battery_bix_valid(struct acpi_bix *bix);
506 int acpi_battery_get_battinfo(device_t dev,
507 struct acpi_battinfo *info);
509 /* Embedded controller. */
510 void acpi_ec_ecdt_probe(device_t);
512 /* AC adapter interface. */
513 int acpi_acad_get_acline(int *);
515 /* Package manipulation convenience functions. */
516 #define ACPI_PKG_VALID(pkg, size) \
517 ((pkg) != NULL && (pkg)->Type == ACPI_TYPE_PACKAGE && \
518 (pkg)->Package.Count >= (size))
519 #define ACPI_PKG_VALID_EQ(pkg, size) \
520 ((pkg) != NULL && (pkg)->Type == ACPI_TYPE_PACKAGE && \
521 (pkg)->Package.Count == (size))
522 int acpi_PkgInt(ACPI_OBJECT *res, int idx, UINT64 *dst);
523 int acpi_PkgInt32(ACPI_OBJECT *res, int idx, uint32_t *dst);
524 int acpi_PkgInt16(ACPI_OBJECT *res, int idx, uint16_t *dst);
525 int acpi_PkgStr(ACPI_OBJECT *res, int idx, void *dst, size_t size);
526 int acpi_PkgGas(device_t dev, ACPI_OBJECT *res, int idx, int *type,
527 int *rid, struct resource **dst, u_int flags);
528 int acpi_PkgFFH_IntelCpu(ACPI_OBJECT *res, int idx, int *vendor,
529 int *class, uint64_t *address, int *accsize);
530 ACPI_HANDLE acpi_GetReference(ACPI_HANDLE scope, ACPI_OBJECT *obj);
533 * Base level for BUS_ADD_CHILD. Special devices are added at orders less
534 * than this, and normal devices at or above this level. This keeps the
535 * probe order sorted so that things like sysresource are available before
536 * their children need them.
538 #define ACPI_DEV_BASE_ORDER 100
540 /* Default maximum number of tasks to enqueue. */
541 #ifndef ACPI_MAX_TASKS
542 #define ACPI_MAX_TASKS MAX(32, MAXCPU * 4)
545 /* Default number of task queue threads to start. */
546 #ifndef ACPI_MAX_THREADS
547 #define ACPI_MAX_THREADS 3
550 /* Use the device logging level for ktr(4). */
551 #define KTR_ACPI KTR_DEV
553 SYSCTL_DECL(_debug_acpi);
556 * Parse and use proximity information in SRAT and SLIT.
558 int acpi_pxm_init(int ncpus, vm_paddr_t maxphys);
559 void acpi_pxm_parse_tables(void);
560 void acpi_pxm_set_mem_locality(void);
561 void acpi_pxm_set_cpu_locality(void);
562 int acpi_pxm_get_cpu_locality(int apic_id);
565 * Map a PXM to a VM domain.
567 * Returns the VM domain ID if found, or -1 if not found / invalid.
569 int acpi_map_pxm_to_vm_domainid(int pxm);
570 int acpi_get_cpus(device_t dev, device_t child, enum cpu_sets op,
571 size_t setsize, cpuset_t *cpuset);
572 int acpi_get_domain(device_t dev, device_t child, int *domain);
576 * ARM specific ACPI interfaces, relating to IORT table.
578 int acpi_iort_map_pci_msi(u_int seg, u_int rid, u_int *xref, u_int *devid);
579 int acpi_iort_map_pci_smmuv3(u_int seg, u_int rid, u_int *xref, u_int *devid);
580 int acpi_iort_its_lookup(u_int its_id, u_int *xref, int *pxm);
583 #endif /* !_ACPIVAR_H_ */