The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/dev/acpica/acpivar.h

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    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: releng/9.0/sys/dev/acpica/acpivar.h 227397 2011-11-09 18:12:42Z jhb $
   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     bus_dma_tag_t       acpi_waketag;
   75     bus_dmamap_t        acpi_wakemap;
   76     vm_offset_t         acpi_wakeaddr;
   77     vm_paddr_t          acpi_wakephys;
   78 
   79     int                 acpi_next_sstate;       /* Next suspend Sx state. */
   80     struct apm_clone_data *acpi_clone;          /* Pseudo-dev for devd(8). */
   81     STAILQ_HEAD(,apm_clone_data) apm_cdevs;     /* All apm/apmctl/acpi cdevs. */
   82     struct callout      susp_force_to;          /* Force suspend if no acks. */
   83 };
   84 
   85 struct acpi_device {
   86     /* ACPI ivars */
   87     ACPI_HANDLE                 ad_handle;
   88     void                        *ad_private;
   89     int                         ad_flags;
   90 
   91     /* Resources */
   92     struct resource_list        ad_rl;
   93 };
   94 
   95 /* Track device (/dev/{apm,apmctl} and /dev/acpi) notification status. */
   96 struct apm_clone_data {
   97     STAILQ_ENTRY(apm_clone_data) entries;
   98     struct cdev         *cdev;
   99     int                 flags;
  100 #define ACPI_EVF_NONE   0       /* /dev/apm semantics */
  101 #define ACPI_EVF_DEVD   1       /* /dev/acpi is handled via devd(8) */
  102 #define ACPI_EVF_WRITE  2       /* Device instance is opened writable. */
  103     int                 notify_status;
  104 #define APM_EV_NONE     0       /* Device not yet aware of pending sleep. */
  105 #define APM_EV_NOTIFIED 1       /* Device saw next sleep state. */
  106 #define APM_EV_ACKED    2       /* Device agreed sleep can occur. */
  107     struct acpi_softc   *acpi_sc;
  108     struct selinfo      sel_read;
  109 };
  110 
  111 #define ACPI_PRW_MAX_POWERRES   8
  112 
  113 struct acpi_prw_data {
  114     ACPI_HANDLE         gpe_handle;
  115     int                 gpe_bit;
  116     int                 lowest_wake;
  117     ACPI_OBJECT         power_res[ACPI_PRW_MAX_POWERRES];
  118     int                 power_res_count;
  119 };
  120 
  121 /* Flags for each device defined in the AML namespace. */
  122 #define ACPI_FLAG_WAKE_ENABLED  0x1
  123 
  124 /* Macros for extracting parts of a PCI address from an _ADR value. */
  125 #define ACPI_ADR_PCI_SLOT(adr)  (((adr) & 0xffff0000) >> 16)
  126 #define ACPI_ADR_PCI_FUNC(adr)  ((adr) & 0xffff)
  127 
  128 /*
  129  * Entry points to ACPI from above are global functions defined in this
  130  * file, sysctls, and I/O on the control device.  Entry points from below
  131  * are interrupts (the SCI), notifies, task queue threads, and the thermal
  132  * zone polling thread.
  133  *
  134  * ACPI tables and global shared data are protected by a global lock
  135  * (acpi_mutex).  
  136  *
  137  * Each ACPI device can have its own driver-specific mutex for protecting
  138  * shared access to local data.  The ACPI_LOCK macros handle mutexes.
  139  *
  140  * Drivers that need to serialize access to functions (e.g., to route
  141  * interrupts, get/set control paths, etc.) should use the sx lock macros
  142  * (ACPI_SERIAL).
  143  *
  144  * ACPI-CA handles its own locking and should not be called with locks held.
  145  *
  146  * The most complicated path is:
  147  *     GPE -> EC runs _Qxx -> _Qxx reads EC space -> GPE
  148  */
  149 extern struct mtx                       acpi_mutex;
  150 #define ACPI_LOCK(sys)                  mtx_lock(&sys##_mutex)
  151 #define ACPI_UNLOCK(sys)                mtx_unlock(&sys##_mutex)
  152 #define ACPI_LOCK_ASSERT(sys)           mtx_assert(&sys##_mutex, MA_OWNED);
  153 #define ACPI_LOCK_DECL(sys, name)                               \
  154         static struct mtx sys##_mutex;                          \
  155         MTX_SYSINIT(sys##_mutex, &sys##_mutex, name, MTX_DEF)
  156 #define ACPI_SERIAL_BEGIN(sys)          sx_xlock(&sys##_sxlock)
  157 #define ACPI_SERIAL_END(sys)            sx_xunlock(&sys##_sxlock)
  158 #define ACPI_SERIAL_ASSERT(sys)         sx_assert(&sys##_sxlock, SX_XLOCKED);
  159 #define ACPI_SERIAL_DECL(sys, name)                             \
  160         static struct sx sys##_sxlock;                          \
  161         SX_SYSINIT(sys##_sxlock, &sys##_sxlock, name)
  162 
  163 /*
  164  * ACPI CA does not define layers for non-ACPI CA drivers.
  165  * We define some here within the range provided.
  166  */
  167 #define ACPI_AC_ADAPTER         0x00010000
  168 #define ACPI_BATTERY            0x00020000
  169 #define ACPI_BUS                0x00040000
  170 #define ACPI_BUTTON             0x00080000
  171 #define ACPI_EC                 0x00100000
  172 #define ACPI_FAN                0x00200000
  173 #define ACPI_POWERRES           0x00400000
  174 #define ACPI_PROCESSOR          0x00800000
  175 #define ACPI_THERMAL            0x01000000
  176 #define ACPI_TIMER              0x02000000
  177 #define ACPI_OEM                0x04000000
  178 
  179 /*
  180  * Constants for different interrupt models used with acpi_SetIntrModel().
  181  */
  182 #define ACPI_INTR_PIC           0
  183 #define ACPI_INTR_APIC          1
  184 #define ACPI_INTR_SAPIC         2
  185 
  186 /*
  187  * Various features and capabilities for the acpi_get_features() method.
  188  * In particular, these are used for the ACPI 3.0 _PDC and _OSC methods.
  189  * See the Intel document titled "Intel Processor Vendor-Specific ACPI",
  190  * number 302223-005.
  191  */
  192 #define ACPI_CAP_PERF_MSRS      (1 << 0)  /* Intel SpeedStep PERF_CTL MSRs */
  193 #define ACPI_CAP_C1_IO_HALT     (1 << 1)  /* Intel C1 "IO then halt" sequence */
  194 #define ACPI_CAP_THR_MSRS       (1 << 2)  /* Intel OnDemand throttling MSRs */
  195 #define ACPI_CAP_SMP_SAME       (1 << 3)  /* MP C1, Px, and Tx (all the same) */
  196 #define ACPI_CAP_SMP_SAME_C3    (1 << 4)  /* MP C2 and C3 (all the same) */
  197 #define ACPI_CAP_SMP_DIFF_PX    (1 << 5)  /* MP Px (different, using _PSD) */
  198 #define ACPI_CAP_SMP_DIFF_CX    (1 << 6)  /* MP Cx (different, using _CSD) */
  199 #define ACPI_CAP_SMP_DIFF_TX    (1 << 7)  /* MP Tx (different, using _TSD) */
  200 #define ACPI_CAP_SMP_C1_NATIVE  (1 << 8)  /* MP C1 support other than halt */
  201 #define ACPI_CAP_SMP_C3_NATIVE  (1 << 9)  /* MP C2 and C3 support */
  202 #define ACPI_CAP_PX_HW_COORD    (1 << 11) /* Intel P-state HW coordination */
  203 
  204 /*
  205  * Quirk flags.
  206  *
  207  * ACPI_Q_BROKEN: Disables all ACPI support.
  208  * ACPI_Q_TIMER: Disables support for the ACPI timer.
  209  * ACPI_Q_MADT_IRQ0: Specifies that ISA IRQ 0 is wired up to pin 0 of the
  210  *      first APIC and that the MADT should force that by ignoring the PC-AT
  211  *      compatible flag and ignoring overrides that redirect IRQ 0 to pin 2.
  212  */
  213 extern int      acpi_quirks;
  214 #define ACPI_Q_OK               0
  215 #define ACPI_Q_BROKEN           (1 << 0)
  216 #define ACPI_Q_TIMER            (1 << 1)
  217 #define ACPI_Q_MADT_IRQ0        (1 << 2)
  218 
  219 /*
  220  * Note that the low ivar values are reserved to provide
  221  * interface compatibility with ISA drivers which can also
  222  * attach to ACPI.
  223  */
  224 #define ACPI_IVAR_HANDLE        0x100
  225 #define ACPI_IVAR_UNUSED        0x101   /* Unused/reserved. */
  226 #define ACPI_IVAR_PRIVATE       0x102
  227 #define ACPI_IVAR_FLAGS         0x103
  228 
  229 /*
  230  * Accessor functions for our ivars.  Default value for BUS_READ_IVAR is
  231  * (type) 0.  The <sys/bus.h> accessor functions don't check return values.
  232  */
  233 #define __ACPI_BUS_ACCESSOR(varp, var, ivarp, ivar, type)       \
  234                                                                 \
  235 static __inline type varp ## _get_ ## var(device_t dev)         \
  236 {                                                               \
  237     uintptr_t v = 0;                                            \
  238     BUS_READ_IVAR(device_get_parent(dev), dev,                  \
  239         ivarp ## _IVAR_ ## ivar, &v);                           \
  240     return ((type) v);                                          \
  241 }                                                               \
  242                                                                 \
  243 static __inline void varp ## _set_ ## var(device_t dev, type t) \
  244 {                                                               \
  245     uintptr_t v = (uintptr_t) t;                                \
  246     BUS_WRITE_IVAR(device_get_parent(dev), dev,                 \
  247         ivarp ## _IVAR_ ## ivar, v);                            \
  248 }
  249 
  250 __ACPI_BUS_ACCESSOR(acpi, handle, ACPI, HANDLE, ACPI_HANDLE)
  251 __ACPI_BUS_ACCESSOR(acpi, private, ACPI, PRIVATE, void *)
  252 __ACPI_BUS_ACCESSOR(acpi, flags, ACPI, FLAGS, int)
  253 
  254 void acpi_fake_objhandler(ACPI_HANDLE h, void *data);
  255 static __inline device_t
  256 acpi_get_device(ACPI_HANDLE handle)
  257 {
  258     void *dev = NULL;
  259     AcpiGetData(handle, acpi_fake_objhandler, &dev);
  260     return ((device_t)dev);
  261 }
  262 
  263 static __inline ACPI_OBJECT_TYPE
  264 acpi_get_type(device_t dev)
  265 {
  266     ACPI_HANDLE         h;
  267     ACPI_OBJECT_TYPE    t;
  268 
  269     if ((h = acpi_get_handle(dev)) == NULL)
  270         return (ACPI_TYPE_NOT_FOUND);
  271     if (AcpiGetType(h, &t) != AE_OK)
  272         return (ACPI_TYPE_NOT_FOUND);
  273     return (t);
  274 }
  275 
  276 /* Find the difference between two PM tick counts. */
  277 static __inline uint32_t
  278 acpi_TimerDelta(uint32_t end, uint32_t start)
  279 {
  280 
  281         if (end < start && (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER) == 0)
  282                 end |= 0x01000000;
  283         return (end - start);
  284 }
  285 
  286 #ifdef ACPI_DEBUGGER
  287 void            acpi_EnterDebugger(void);
  288 #endif
  289 
  290 #ifdef ACPI_DEBUG
  291 #include <sys/cons.h>
  292 #define STEP(x)         do {printf x, printf("\n"); cngetc();} while (0)
  293 #else
  294 #define STEP(x)
  295 #endif
  296 
  297 #define ACPI_VPRINT(dev, acpi_sc, x...) do {                    \
  298     if (acpi_get_verbose(acpi_sc))                              \
  299         device_printf(dev, x);                                  \
  300 } while (0)
  301 
  302 /* Values for the device _STA (status) method. */
  303 #define ACPI_STA_PRESENT        (1 << 0)
  304 #define ACPI_STA_ENABLED        (1 << 1)
  305 #define ACPI_STA_SHOW_IN_UI     (1 << 2)
  306 #define ACPI_STA_FUNCTIONAL     (1 << 3)
  307 #define ACPI_STA_BATT_PRESENT   (1 << 4)
  308 
  309 #define ACPI_DEVINFO_PRESENT(x, flags)                                  \
  310         (((x) & (flags)) == (flags))
  311 #define ACPI_DEVICE_PRESENT(x)                                          \
  312         ACPI_DEVINFO_PRESENT(x, ACPI_STA_PRESENT | ACPI_STA_FUNCTIONAL)
  313 #define ACPI_BATTERY_PRESENT(x)                                         \
  314         ACPI_DEVINFO_PRESENT(x, ACPI_STA_PRESENT | ACPI_STA_FUNCTIONAL | \
  315             ACPI_STA_BATT_PRESENT)
  316 
  317 /* Callback function type for walking subtables within a table. */
  318 typedef void acpi_subtable_handler(ACPI_SUBTABLE_HEADER *, void *);
  319 
  320 BOOLEAN         acpi_DeviceIsPresent(device_t dev);
  321 BOOLEAN         acpi_BatteryIsPresent(device_t dev);
  322 ACPI_STATUS     acpi_GetHandleInScope(ACPI_HANDLE parent, char *path,
  323                     ACPI_HANDLE *result);
  324 ACPI_BUFFER     *acpi_AllocBuffer(int size);
  325 ACPI_STATUS     acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp,
  326                     UINT32 *number);
  327 ACPI_STATUS     acpi_GetInteger(ACPI_HANDLE handle, char *path,
  328                     UINT32 *number);
  329 ACPI_STATUS     acpi_SetInteger(ACPI_HANDLE handle, char *path,
  330                     UINT32 number);
  331 ACPI_STATUS     acpi_ForeachPackageObject(ACPI_OBJECT *obj, 
  332                     void (*func)(ACPI_OBJECT *comp, void *arg), void *arg);
  333 ACPI_STATUS     acpi_FindIndexedResource(ACPI_BUFFER *buf, int index,
  334                     ACPI_RESOURCE **resp);
  335 ACPI_STATUS     acpi_AppendBufferResource(ACPI_BUFFER *buf,
  336                     ACPI_RESOURCE *res);
  337 ACPI_STATUS     acpi_OverrideInterruptLevel(UINT32 InterruptNumber);
  338 ACPI_STATUS     acpi_SetIntrModel(int model);
  339 int             acpi_ReqSleepState(struct acpi_softc *sc, int state);
  340 int             acpi_AckSleepState(struct apm_clone_data *clone, int error);
  341 ACPI_STATUS     acpi_SetSleepState(struct acpi_softc *sc, int state);
  342 void            acpi_resync_clock(struct acpi_softc *sc);
  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                     u_long start, u_long end, u_long count, u_int flags);
  387 
  388 /* ACPI event handling */
  389 UINT32          acpi_event_power_button_sleep(void *context);
  390 UINT32          acpi_event_power_button_wake(void *context);
  391 UINT32          acpi_event_sleep_button_sleep(void *context);
  392 UINT32          acpi_event_sleep_button_wake(void *context);
  393 
  394 #define ACPI_EVENT_PRI_FIRST      0
  395 #define ACPI_EVENT_PRI_DEFAULT    10000
  396 #define ACPI_EVENT_PRI_LAST       20000
  397 
  398 typedef void (*acpi_event_handler_t)(void *, int);
  399 
  400 EVENTHANDLER_DECLARE(acpi_sleep_event, acpi_event_handler_t);
  401 EVENTHANDLER_DECLARE(acpi_wakeup_event, acpi_event_handler_t);
  402 
  403 /* Device power control. */
  404 ACPI_STATUS     acpi_pwr_wake_enable(ACPI_HANDLE consumer, int enable);
  405 ACPI_STATUS     acpi_pwr_switch_consumer(ACPI_HANDLE consumer, int state);
  406 int             acpi_device_pwr_for_sleep(device_t bus, device_t dev,
  407                     int *dstate);
  408 
  409 /* APM emulation */
  410 void            acpi_apm_init(struct acpi_softc *);
  411 
  412 /* Misc. */
  413 static __inline struct acpi_softc *
  414 acpi_device_get_parent_softc(device_t child)
  415 {
  416     device_t    parent;
  417 
  418     parent = device_get_parent(child);
  419     if (parent == NULL)
  420         return (NULL);
  421     return (device_get_softc(parent));
  422 }
  423 
  424 static __inline int
  425 acpi_get_verbose(struct acpi_softc *sc)
  426 {
  427     if (sc)
  428         return (sc->acpi_verbose);
  429     return (0);
  430 }
  431 
  432 char            *acpi_name(ACPI_HANDLE handle);
  433 int             acpi_avoid(ACPI_HANDLE handle);
  434 int             acpi_disabled(char *subsys);
  435 int             acpi_machdep_init(device_t dev);
  436 void            acpi_install_wakeup_handler(struct acpi_softc *sc);
  437 int             acpi_sleep_machdep(struct acpi_softc *sc, int state);
  438 int             acpi_table_quirks(int *quirks);
  439 int             acpi_machdep_quirks(int *quirks);
  440 
  441 /* Battery Abstraction. */
  442 struct acpi_battinfo;
  443 
  444 int             acpi_battery_register(device_t dev);
  445 int             acpi_battery_remove(device_t dev);
  446 int             acpi_battery_get_units(void);
  447 int             acpi_battery_get_info_expire(void);
  448 int             acpi_battery_bst_valid(struct acpi_bst *bst);
  449 int             acpi_battery_bif_valid(struct acpi_bif *bif);
  450 int             acpi_battery_get_battinfo(device_t dev,
  451                     struct acpi_battinfo *info);
  452 
  453 /* Embedded controller. */
  454 void            acpi_ec_ecdt_probe(device_t);
  455 
  456 /* AC adapter interface. */
  457 int             acpi_acad_get_acline(int *);
  458 
  459 /* Package manipulation convenience functions. */
  460 #define ACPI_PKG_VALID(pkg, size)                               \
  461     ((pkg) != NULL && (pkg)->Type == ACPI_TYPE_PACKAGE &&       \
  462      (pkg)->Package.Count >= (size))
  463 int             acpi_PkgInt(ACPI_OBJECT *res, int idx, UINT64 *dst);
  464 int             acpi_PkgInt32(ACPI_OBJECT *res, int idx, uint32_t *dst);
  465 int             acpi_PkgStr(ACPI_OBJECT *res, int idx, void *dst, size_t size);
  466 int             acpi_PkgGas(device_t dev, ACPI_OBJECT *res, int idx, int *type,
  467                     int *rid, struct resource **dst, u_int flags);
  468 ACPI_HANDLE     acpi_GetReference(ACPI_HANDLE scope, ACPI_OBJECT *obj);
  469 
  470 /*
  471  * Base level for BUS_ADD_CHILD.  Special devices are added at orders less
  472  * than this, and normal devices at or above this level.  This keeps the
  473  * probe order sorted so that things like sysresource are available before
  474  * their children need them.
  475  */
  476 #define ACPI_DEV_BASE_ORDER     10
  477 
  478 /* Default maximum number of tasks to enqueue. */
  479 #ifndef ACPI_MAX_TASKS
  480 #define ACPI_MAX_TASKS          32
  481 #endif
  482 
  483 /* Default number of task queue threads to start. */
  484 #ifndef ACPI_MAX_THREADS
  485 #define ACPI_MAX_THREADS        3
  486 #endif
  487 
  488 /* Use the device logging level for ktr(4). */
  489 #define KTR_ACPI                KTR_DEV
  490 
  491 #endif /* _KERNEL */
  492 #endif /* !_ACPIVAR_H_ */

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