sys/dev/acpica5/acpivar.h

   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: src/sys/dev/acpica/acpivar.h,v 1.108.8.1 2009/04/15 03:14:26 kensmith Exp $
  29  */
  30
  31 #ifndef _ACPIVAR_H_
  32 #define _ACPIVAR_H_
  33
  34 #ifdef _KERNEL
  35
  36
  37 #include "acpi_if.h"
  38 #include "bus_if.h"
  39 #include <sys/eventhandler.h>
  40 #include <sys/sysctl.h>
  41 #if __FreeBSD_version >= 500000
  42 #include <sys/lock.h>
  43 #include <sys/mutex.h>
  44 #endif
  45 #include <sys/bus.h>
  46 #include <sys/spinlock.h>
  47 #include <sys/spinlock2.h>
  48 #include <sys/serialize.h>
  49 #include "acmacros.h"
  50 #include "acconfig.h"
  51 #include "aclocal.h"
  52 #include "acobject.h"
  53 #include "acstruct.h"
  54
  55 struct apm_clone_data;
  56 struct acpi_softc {
  57     device_t            acpi_dev;
  58     cdev_t              acpi_dev_t;
  59
  60     struct resource     *acpi_irq;
  61     int                 acpi_irq_rid;
  62     void                *acpi_irq_handle;
  63
  64     int                 acpi_enabled;
  65     int                 acpi_sstate;
  66     int                 acpi_sleep_disabled;
  67
  68     struct sysctl_ctx_list acpi_sysctl_ctx;
  69     struct sysctl_oid   *acpi_sysctl_tree;
  70     int                 acpi_power_button_sx;
  71     int                 acpi_sleep_button_sx;
  72     int                 acpi_lid_switch_sx;
  73
  74     int                 acpi_standby_sx;
  75     int                 acpi_suspend_sx;
  76
  77     int                 acpi_sleep_delay;
  78     int                 acpi_s4bios;
  79     int                 acpi_do_disable;
  80     int                 acpi_verbose;
  81     int                 acpi_handle_reboot;
  82
  83     bus_dma_tag_t       acpi_waketag;
  84     bus_dmamap_t        acpi_wakemap;
  85     vm_offset_t         acpi_wakeaddr;
  86     vm_paddr_t          acpi_wakephys;
  87
  88     int                 acpi_next_sstate;       /* Next suspend Sx state. */
  89     struct apm_clone_data *acpi_clone;          /* Pseudo-dev for devd(8). */
  90     STAILQ_HEAD(,apm_clone_data) apm_cdevs;     /* All apm/apmctl/acpi cdevs. */
  91     struct callout      susp_force_to;          /* Force suspend if no acks. */
  92 };
  93
  94 struct acpi_device {
  95     /* ACPI ivars */
  96     ACPI_HANDLE                 ad_handle;
  97     uintptr_t                   ad_magic;
  98     void                        *ad_private;
  99     int                         ad_flags;
 100
 101     /* Resources */
 102     struct resource_list        ad_rl;
 103 };
 104
 105 /* Track device (/dev/{apm,apmctl} and /dev/acpi) notification status. */
 106 struct apm_clone_data {
 107     STAILQ_ENTRY(apm_clone_data) entries;
 108     struct cdev         *cdev;
 109     int                 flags;
 110 #define ACPI_EVF_NONE   0       /* /dev/apm semantics */
 111 #define ACPI_EVF_DEVD   1       /* /dev/acpi is handled via devd(8) */
 112 #define ACPI_EVF_WRITE  2       /* Device instance is opened writable. */
 113     int                 notify_status;
 114 #define APM_EV_NONE     0       /* Device not yet aware of pending sleep. */
 115 #define APM_EV_NOTIFIED 1       /* Device saw next sleep state. */
 116 #define APM_EV_ACKED    2       /* Device agreed sleep can occur. */
 117     struct acpi_softc   *acpi_sc;
 118 };
 119
 120 #define ACPI_PRW_MAX_POWERRES   8
 121
 122 struct acpi_prw_data {
 123     ACPI_HANDLE         gpe_handle;
 124     int                 gpe_bit;
 125     int                 lowest_wake;
 126     ACPI_OBJECT         power_res[ACPI_PRW_MAX_POWERRES];
 127     int                 power_res_count;
 128 };
 129
 130 /* Flags for each device defined in the AML namespace. */
 131 #define ACPI_FLAG_WAKE_ENABLED  0x1
 132
 133 /* Macros for extracting parts of a PCI address from an _ADR value. */
 134 #define ACPI_ADR_PCI_SLOT(adr)  (((adr) & 0xffff0000) >> 16)
 135 #define ACPI_ADR_PCI_FUNC(adr)  ((adr) & 0xffff)
 136
 137 /*
 138  * Entry points to ACPI from above are global functions defined in this
 139  * file, sysctls, and I/O on the control device.  Entry points from below
 140  * are interrupts (the SCI), notifies, task queue threads, and the thermal
 141  * zone polling thread.
 142  *
 143  * ACPI tables and global shared data are protected by a global lock
 144  * (acpi_lock).
 145  *
 146  * Each ACPI device can have its own driver-specific mutex for protecting
 147  * shared access to local data.  The ACPI_LOCK macros handle mutexes.
 148  *
 149  * Drivers that need to serialize access to functions (e.g., to route
 150  * interrupts, get/set control paths, etc.) should use the sx lock macros
 151  * (ACPI_SERIAL).
 152  *
 153  * ACPI-CA handles its own locking and should not be called with locks held.
 154  *
 155  * The most complicated path is:
 156  *     GPE -> EC runs _Qxx -> _Qxx reads EC space -> GPE
 157  */
 158 extern struct lock acpi_lock;
 159 /* acpi_thermal does lock recurs on purpose */
 160 /* I bet I should use some other locks here */
 161 #define ACPI_LOCK(sys)                  lockmgr(&sys##_lock, LK_EXCLUSIVE|LK_RETRY|LK_CANRECURSE);
 162 #define ACPI_UNLOCK(sys)                lockmgr(&sys##_lock, LK_RELEASE);
 163 #define ACPI_LOCK_ASSERT(sys)           KKASSERT(lockstatus(&sys##_lock, curthread) == LK_EXCLUSIVE);
 164 #define ACPI_ASSERTLOCK ACPI_LOCK_ASSERT
 165 #define ACPI_LOCK_DECL(sys, name)       static struct lock sys##_lock;
 166 #define ACPI_LOCK_INIT(sys, name)       lockinit(&sys##_lock, name, 0, 0);
 167
 168 #define ACPI_SERIAL_INIT(sys)           lwkt_serialize_init(&sys##_serializer);
 169 #define ACPI_SERIAL_BEGIN(sys)          lwkt_serialize_enter(&sys##_serializer);
 170 #define ACPI_SERIAL_END(sys)            lwkt_serialize_exit(&sys##_serializer);
 171 #define ACPI_SERIAL_ASSERT(sys)         ASSERT_SERIALIZED(&sys##_serializer);
 172 #define ACPI_SERIAL_DECL(sys, name)     static struct lwkt_serialize sys##_serializer;
 173 /*
 174  * ACPI CA does not define layers for non-ACPI CA drivers.
 175  * We define some here within the range provided.
 176  */
 177 #define ACPI_AC_ADAPTER         0x00010000
 178 #define ACPI_BATTERY            0x00020000
 179 #define ACPI_BUS                0x00040000
 180 #define ACPI_BUTTON             0x00080000
 181 #define ACPI_EC                 0x00100000
 182 #define ACPI_FAN                0x00200000
 183 #define ACPI_POWERRES           0x00400000
 184 #define ACPI_PROCESSOR          0x00800000
 185 #define ACPI_THERMAL            0x01000000
 186 #define ACPI_TIMER              0x02000000
 187 #define ACPI_OEM                0x04000000
 188
 189 /*
 190  * Constants for different interrupt models used with acpi_SetIntrModel().
 191  */
 192 #define ACPI_INTR_PIC           0
 193 #define ACPI_INTR_APIC          1
 194 #define ACPI_INTR_SAPIC         2
 195
 196 /*
 197  * Various features and capabilities for the acpi_get_features() method.
 198  * In particular, these are used for the ACPI 3.0 _PDC and _OSC methods.
 199  * See the Intel document titled "Processor Driver Capabilities Bit
 200  * Definitions", number 302223-002.
 201  */
 202 #define ACPI_CAP_PERF_MSRS      (1 << 0) /* Intel SpeedStep PERF_CTL MSRs */
 203 #define ACPI_CAP_C1_IO_HALT     (1 << 1) /* Intel C1 "IO then halt" sequence */
 204 #define ACPI_CAP_THR_MSRS       (1 << 2) /* Intel OnDemand throttling MSRs */
 205 #define ACPI_CAP_SMP_SAME       (1 << 3) /* MP C1, Px, and Tx (all the same) */
 206 #define ACPI_CAP_SMP_SAME_C3    (1 << 4) /* MP C2 and C3 (all the same) */
 207 #define ACPI_CAP_SMP_DIFF_PX    (1 << 5) /* MP Px (different, using _PSD) */
 208 #define ACPI_CAP_SMP_DIFF_CX    (1 << 6) /* MP Cx (different, using _CSD) */
 209 #define ACPI_CAP_SMP_DIFF_TX    (1 << 7) /* MP Tx (different, using _TSD) */
 210 #define ACPI_CAP_SMP_C1_NATIVE  (1 << 8) /* MP C1 support other than halt */
 211
 212 /*
 213  * Quirk flags.
 214  *
 215  * ACPI_Q_BROKEN: Disables all ACPI support.
 216  * ACPI_Q_TIMER: Disables support for the ACPI timer.
 217  * ACPI_Q_MADT_IRQ0: Specifies that ISA IRQ 0 is wired up to pin 0 of the
 218  *      first APIC and that the MADT should force that by ignoring the PC-AT
 219  *      compatible flag and ignoring overrides that redirect IRQ 0 to pin 2.
 220  */
 221 extern int      acpi_quirks;
 222 #define ACPI_Q_OK               0
 223 #define ACPI_Q_BROKEN           (1 << 0)
 224 #define ACPI_Q_TIMER            (1 << 1)
 225 #define ACPI_Q_MADT_IRQ0        (1 << 2)
 226
 227 /*
 228  * Note that the low ivar values are reserved to provide
 229  * interface compatibility with ISA drivers which can also
 230  * attach to ACPI.
 231  */
 232 #define ACPI_IVAR_HANDLE        0x100
 233 #define ACPI_IVAR_MAGIC         0x101
 234 #define ACPI_IVAR_PRIVATE       0x102
 235 #define ACPI_IVAR_FLAGS         0x103
 236
 237 /*
 238  * Accessor functions for our ivars.  Default value for BUS_READ_IVAR is
 239  * (type) 0.  The <sys/bus.h> accessor functions don't check return values.
 240  */
 241 #define __ACPI_BUS_ACCESSOR(varp, var, ivarp, ivar, type)       \
 242                                                                 \
 243 static __inline type varp ## _get_ ## var(device_t dev)         \
 244 {                                                               \
 245     uintptr_t v = 0;                                            \
 246     BUS_READ_IVAR(device_get_parent(dev), dev,                  \
 247         ivarp ## _IVAR_ ## ivar, &v);                           \
 248     return ((type) v);                                          \
 249 }                                                               \
 250                                                                 \
 251 static __inline void varp ## _set_ ## var(device_t dev, type t) \
 252 {                                                               \
 253     uintptr_t v = (uintptr_t) t;                                \
 254     BUS_WRITE_IVAR(device_get_parent(dev), dev,                 \
 255         ivarp ## _IVAR_ ## ivar, v);                            \
 256 }
 257
 258 __ACPI_BUS_ACCESSOR(acpi, handle, ACPI, HANDLE, ACPI_HANDLE)
 259 __ACPI_BUS_ACCESSOR(acpi, magic, ACPI, MAGIC, uintptr_t)
 260 __ACPI_BUS_ACCESSOR(acpi, private, ACPI, PRIVATE, void *)
 261 __ACPI_BUS_ACCESSOR(acpi, flags, ACPI, FLAGS, int)
 262
 263 void acpi_fake_objhandler(ACPI_HANDLE h, UINT32 fn, void *data);
 264 static __inline device_t
 265 acpi_get_device(ACPI_HANDLE handle)
 266 {
 267     void *dev = NULL;
 268     AcpiGetData(handle, acpi_fake_objhandler, &dev);
 269     return ((device_t)dev);
 270 }
 271
 272 static __inline ACPI_OBJECT_TYPE
 273 acpi_get_type(device_t dev)
 274 {
 275     ACPI_HANDLE         h;
 276     ACPI_OBJECT_TYPE    t;
 277
 278     if ((h = acpi_get_handle(dev)) == NULL)
 279         return (ACPI_TYPE_NOT_FOUND);
 280     if (AcpiGetType(h, &t) != AE_OK)
 281         return (ACPI_TYPE_NOT_FOUND);
 282     return (t);
 283 }
 284
 285 #ifdef ACPI_DEBUGGER
 286 void            acpi_EnterDebugger(void);
 287 #endif
 288
 289 #ifdef ACPI_DEBUG
 290 #include <sys/cons.h>
 291 #define STEP(x)         do {printf x, printf("\n"); cngetc();} while (0)
 292 #else
 293 #define STEP(x)
 294 #endif
 295
 296 #define ACPI_VPRINT(dev, acpi_sc, x...) do {                    \
 297     if (acpi_get_verbose(acpi_sc))                              \
 298         device_printf(dev, x);                                  \
 299 } while (0)
 300
 301 /* Values for the device _STA (status) method. */
 302 #define ACPI_STA_PRESENT        (1 << 0)
 303 #define ACPI_STA_ENABLED        (1 << 1)
 304 #define ACPI_STA_SHOW_IN_UI     (1 << 2)
 305 #define ACPI_STA_FUNCTIONAL     (1 << 3)
 306 #define ACPI_STA_BATT_PRESENT   (1 << 4)
 307
 308 #define ACPI_DEVINFO_PRESENT(x, flags)                                  \
 309         (((x) & (flags)) == (flags))
 310 #define ACPI_DEVICE_PRESENT(x)                                          \
 311         ACPI_DEVINFO_PRESENT(x, ACPI_STA_PRESENT | ACPI_STA_FUNCTIONAL)
 312 #define ACPI_BATTERY_PRESENT(x)                                         \
 313         ACPI_DEVINFO_PRESENT(x, ACPI_STA_PRESENT | ACPI_STA_FUNCTIONAL | \
 314             ACPI_STA_BATT_PRESENT)
 315
 316 BOOLEAN         acpi_DeviceIsPresent(device_t dev);
 317 BOOLEAN         acpi_BatteryIsPresent(device_t dev);
 318 ACPI_STATUS     acpi_GetHandleInScope(ACPI_HANDLE parent, char *path,
 319                     ACPI_HANDLE *result);
 320 uint32_t        acpi_TimerDelta(uint32_t end, uint32_t start);
 321 ACPI_BUFFER     *acpi_AllocBuffer(int size);
 322 ACPI_STATUS     acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp,
 323                     UINT32 *number);
 324 ACPI_STATUS     acpi_GetInteger(ACPI_HANDLE handle, char *path,
 325                     UINT32 *number);
 326 ACPI_STATUS     acpi_SetInteger(ACPI_HANDLE handle, char *path,
 327                     UINT32 number);
 328 ACPI_STATUS     acpi_ForeachPackageObject(ACPI_OBJECT *obj,
 329                     void (*func)(ACPI_OBJECT *comp, void *arg), void *arg);
 330 ACPI_STATUS     acpi_FindIndexedResource(ACPI_BUFFER *buf, int index,
 331                     ACPI_RESOURCE **resp);
 332 ACPI_STATUS     acpi_AppendBufferResource(ACPI_BUFFER *buf,
 333                     ACPI_RESOURCE *res);
 334 ACPI_STATUS     acpi_OverrideInterruptLevel(UINT32 InterruptNumber);
 335 ACPI_STATUS     acpi_SetIntrModel(int model);
 336 int             acpi_ReqSleepState(struct acpi_softc *sc, int state);
 337 int             acpi_AckSleepState(struct apm_clone_data *clone, int error);
 338 ACPI_STATUS     acpi_SetSleepState(struct acpi_softc *sc, int state);
 339 int             acpi_wake_init(device_t dev, int type);
 340 int             acpi_wake_set_enable(device_t dev, int enable);
 341 int             acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw);
 342 ACPI_STATUS     acpi_Startup(void);
 343 void            acpi_UserNotify(const char *subsystem, ACPI_HANDLE h,
 344                     uint8_t notify);
 345 int             acpi_bus_alloc_gas(device_t dev, int *type, int *rid,
 346                     ACPI_GENERIC_ADDRESS *gas, struct resource **res,
 347                     u_int flags);
 348 # define kthread_create(a, b, c, d, e, f) kthread_create(a, b, c, f)
 349
 350 struct acpi_parse_resource_set {
 351     void        (*set_init)(device_t dev, void *arg, void **context);
 352     void        (*set_done)(device_t dev, void *context);
 353     void        (*set_ioport)(device_t dev, void *context, uint32_t base,
 354                     uint32_t length);
 355     void        (*set_iorange)(device_t dev, void *context, uint32_t low,
 356                     uint32_t high, uint32_t length, uint32_t align);
 357     void        (*set_memory)(device_t dev, void *context, uint32_t base,
 358                     uint32_t length);
 359     void        (*set_memoryrange)(device_t dev, void *context, uint32_t low,
 360                     uint32_t high, uint32_t length, uint32_t align);
 361     void        (*set_irq)(device_t dev, void *context, u_int8_t *irq,
 362                     int count, int trig, int pol);
 363     void        (*set_ext_irq)(device_t dev, void *context, u_int32_t *irq,
 364                     int count, int trig, int pol);
 365     void        (*set_drq)(device_t dev, void *context, u_int8_t *drq,
 366                     int count);
 367     void        (*set_start_dependent)(device_t dev, void *context,
 368                     int preference);
 369     void        (*set_end_dependent)(device_t dev, void *context);
 370 };
 371
 372 extern struct   acpi_parse_resource_set acpi_res_parse_set;
 373
 374 void            acpi_config_intr(device_t dev, ACPI_RESOURCE *res);
 375 ACPI_STATUS     acpi_lookup_irq_resource(device_t dev, int rid,
 376                     struct resource *res, ACPI_RESOURCE *acpi_res);
 377 ACPI_STATUS     acpi_parse_resources(device_t dev, ACPI_HANDLE handle,
 378                     struct acpi_parse_resource_set *set, void *arg);
 379
 380 /* ACPI event handling */
 381 UINT32          acpi_event_power_button_sleep(void *context);
 382 UINT32          acpi_event_power_button_wake(void *context);
 383 UINT32          acpi_event_sleep_button_sleep(void *context);
 384 UINT32          acpi_event_sleep_button_wake(void *context);
 385
 386 #define ACPI_EVENT_PRI_FIRST      0
 387 #define ACPI_EVENT_PRI_DEFAULT    10000
 388 #define ACPI_EVENT_PRI_LAST       20000
 389
 390 typedef void (*acpi_event_handler_t)(void *, int);
 391
 392 EVENTHANDLER_DECLARE(acpi_sleep_event, acpi_event_handler_t);
 393 EVENTHANDLER_DECLARE(acpi_wakeup_event, acpi_event_handler_t);
 394
 395 /* Device power control. */
 396 ACPI_STATUS     acpi_pwr_wake_enable(ACPI_HANDLE consumer, int enable);
 397 ACPI_STATUS     acpi_pwr_switch_consumer(ACPI_HANDLE consumer, int state);
 398
 399 /* Misc. */
 400 static __inline struct acpi_softc *
 401 acpi_device_get_parent_softc(device_t child)
 402 {
 403     device_t    parent;
 404
 405     parent = device_get_parent(child);
 406     if (parent == NULL)
 407         return (NULL);
 408     return (device_get_softc(parent));
 409 }
 410
 411 static __inline int
 412 acpi_get_verbose(struct acpi_softc *sc)
 413 {
 414     if (sc)
 415         return (sc->acpi_verbose);
 416     return (0);
 417 }
 418
 419 char            *acpi_name(ACPI_HANDLE handle);
 420 int             acpi_avoid(ACPI_HANDLE handle);
 421 int             acpi_disabled(char *subsys);
 422 int             acpi_enabled(char *subsys);
 423 int             acpi_machdep_init(device_t dev);
 424 void            acpi_install_wakeup_handler(struct acpi_softc *sc);
 425 int             acpi_sleep_machdep(struct acpi_softc *sc, int state);
 426 int             acpi_table_quirks(int *quirks);
 427 int             acpi_machdep_quirks(int *quirks);
 428
 429 /* Battery Abstraction. */
 430 struct acpi_battinfo;
 431
 432 int             acpi_battery_register(device_t dev);
 433 int             acpi_battery_remove(device_t dev);
 434 int             acpi_battery_get_units(void);
 435 int             acpi_battery_get_info_expire(void);
 436 int             acpi_battery_bst_valid(struct acpi_bst *bst);
 437 int             acpi_battery_bif_valid(struct acpi_bif *bif);
 438 int             acpi_battery_get_battinfo(device_t dev,
 439                     struct acpi_battinfo *info);
 440
 441 /* Embedded controller. */
 442 void            acpi_ec_ecdt_probe(device_t);
 443
 444 /* AC adapter interface. */
 445 int             acpi_acad_get_acline(int *);
 446
 447 /* Package manipulation convenience functions. */
 448 #define ACPI_PKG_VALID(pkg, size)                               \
 449     ((pkg) != NULL && (pkg)->Type == ACPI_TYPE_PACKAGE &&       \
 450      (pkg)->Package.Count >= (size))
 451 #define ACPI_PKG_VALID_EQ(pkg, size)    \
 452     (ACPI_PKG_VALID((pkg), (size)) && (pkg)->Package.Count == (size))
 453 int             acpi_PkgInt(ACPI_OBJECT *res, int idx, ACPI_INTEGER *dst);
 454 int             acpi_PkgInt32(ACPI_OBJECT *res, int idx, uint32_t *dst);
 455 int             acpi_PkgStr(ACPI_OBJECT *res, int idx, void *dst, size_t size);
 456 int             acpi_PkgGas(device_t dev, ACPI_OBJECT *res, int idx, int *type,
 457                     int *rid, struct resource **dst, u_int flags);
 458 int             acpi_PkgRawGas(ACPI_OBJECT *res, int idx,
 459                                ACPI_GENERIC_ADDRESS *gas);
 460 ACPI_HANDLE     acpi_GetReference(ACPI_HANDLE scope, ACPI_OBJECT *obj);
 461 /* ACPI task kernel thread initialization. */
 462 int     acpi_task_thread_init(void);
 463 extern BOOLEAN acpi_MatchHid(ACPI_HANDLE h, const char *hid);
 464 /*
 465  * Base level for BUS_ADD_CHILD.  Special devices are added at orders less
 466  * than this, and normal devices at or above this level.  This keeps the
 467  * probe order sorted so that things like sysresource are available before
 468  * their children need them.
 469  */
 470 #define ACPI_DEV_BASE_ORDER     10
 471
 472 /* Default number of task queue threads to start. */
 473 #ifndef ACPI_MAX_THREADS
 474 #define ACPI_MAX_THREADS        3
 475 #endif
 476
 477 /* Use the device logging level for ktr(4). */
 478 #define KTR_ACPI                KTR_DEV
 479
 480 #endif /* _KERNEL */
 481 #endif /* !_ACPIVAR_H_ */