2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org>
3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
4 * Copyright (c) 2000, 2001 Michael Smith
5 * Copyright (c) 2000 BSDi
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
34 #include <sys/param.h>
35 #include <sys/kernel.h>
37 #include <sys/fcntl.h>
38 #include <sys/malloc.h>
39 #include <sys/module.h>
42 #include <sys/ioccom.h>
43 #include <sys/reboot.h>
44 #include <sys/sysctl.h>
45 #include <sys/ctype.h>
46 #include <sys/linker.h>
47 #include <sys/power.h>
49 #include <sys/sched.h>
51 #include <sys/timetc.h>
53 #if defined(__i386__) || defined(__amd64__)
54 #include <machine/pci_cfgreg.h>
56 #include <machine/resource.h>
57 #include <machine/bus.h>
59 #include <isa/isavar.h>
60 #include <isa/pnpvar.h>
62 #include <contrib/dev/acpica/include/acpi.h>
63 #include <contrib/dev/acpica/include/accommon.h>
64 #include <contrib/dev/acpica/include/acnamesp.h>
66 #include <dev/acpica/acpivar.h>
67 #include <dev/acpica/acpiio.h>
69 #include <vm/vm_param.h>
71 static MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices");
73 /* Hooks for the ACPI CA debugging infrastructure */
74 #define _COMPONENT ACPI_BUS
75 ACPI_MODULE_NAME("ACPI")
77 static d_open_t acpiopen;
78 static d_close_t acpiclose;
79 static d_ioctl_t acpiioctl;
81 static struct cdevsw acpi_cdevsw = {
82 .d_version = D_VERSION,
89 struct acpi_interface {
94 /* Global mutex for locking access to the ACPI subsystem. */
95 struct mtx acpi_mutex;
97 /* Bitmap of device quirks. */
100 /* Supported sleep states. */
101 static BOOLEAN acpi_sleep_states[ACPI_S_STATE_COUNT];
103 static int acpi_modevent(struct module *mod, int event, void *junk);
104 static int acpi_probe(device_t dev);
105 static int acpi_attach(device_t dev);
106 static int acpi_suspend(device_t dev);
107 static int acpi_resume(device_t dev);
108 static int acpi_shutdown(device_t dev);
109 static device_t acpi_add_child(device_t bus, u_int order, const char *name,
111 static int acpi_print_child(device_t bus, device_t child);
112 static void acpi_probe_nomatch(device_t bus, device_t child);
113 static void acpi_driver_added(device_t dev, driver_t *driver);
114 static int acpi_read_ivar(device_t dev, device_t child, int index,
116 static int acpi_write_ivar(device_t dev, device_t child, int index,
118 static struct resource_list *acpi_get_rlist(device_t dev, device_t child);
119 static void acpi_reserve_resources(device_t dev);
120 static int acpi_sysres_alloc(device_t dev);
121 static int acpi_set_resource(device_t dev, device_t child, int type,
122 int rid, u_long start, u_long count);
123 static struct resource *acpi_alloc_resource(device_t bus, device_t child,
124 int type, int *rid, u_long start, u_long end,
125 u_long count, u_int flags);
126 static int acpi_adjust_resource(device_t bus, device_t child, int type,
127 struct resource *r, u_long start, u_long end);
128 static int acpi_release_resource(device_t bus, device_t child, int type,
129 int rid, struct resource *r);
130 static void acpi_delete_resource(device_t bus, device_t child, int type,
132 static uint32_t acpi_isa_get_logicalid(device_t dev);
133 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count);
134 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids);
135 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev,
136 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters,
138 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level,
139 void *context, void **retval);
140 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev,
141 int max_depth, acpi_scan_cb_t user_fn, void *arg);
142 static int acpi_set_powerstate(device_t child, int state);
143 static int acpi_isa_pnp_probe(device_t bus, device_t child,
144 struct isa_pnp_id *ids);
145 static void acpi_probe_children(device_t bus);
146 static void acpi_probe_order(ACPI_HANDLE handle, int *order);
147 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level,
148 void *context, void **status);
149 static void acpi_sleep_enable(void *arg);
150 static ACPI_STATUS acpi_sleep_disable(struct acpi_softc *sc);
151 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state);
152 static void acpi_shutdown_final(void *arg, int howto);
153 static void acpi_enable_fixed_events(struct acpi_softc *sc);
154 static BOOLEAN acpi_has_hid(ACPI_HANDLE handle);
155 static void acpi_resync_clock(struct acpi_softc *sc);
156 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate);
157 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate);
158 static int acpi_wake_prep_walk(int sstate);
159 static int acpi_wake_sysctl_walk(device_t dev);
160 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS);
161 static void acpi_system_eventhandler_sleep(void *arg, int state);
162 static void acpi_system_eventhandler_wakeup(void *arg, int state);
163 static int acpi_sname2sstate(const char *sname);
164 static const char *acpi_sstate2sname(int sstate);
165 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
166 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
167 static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS);
168 static int acpi_pm_func(u_long cmd, void *arg, ...);
169 static int acpi_child_location_str_method(device_t acdev, device_t child,
170 char *buf, size_t buflen);
171 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child,
172 char *buf, size_t buflen);
173 #if defined(__i386__) || defined(__amd64__)
174 static void acpi_enable_pcie(void);
176 static void acpi_hint_device_unit(device_t acdev, device_t child,
177 const char *name, int *unitp);
178 static void acpi_reset_interfaces(device_t dev);
180 static device_method_t acpi_methods[] = {
181 /* Device interface */
182 DEVMETHOD(device_probe, acpi_probe),
183 DEVMETHOD(device_attach, acpi_attach),
184 DEVMETHOD(device_shutdown, acpi_shutdown),
185 DEVMETHOD(device_detach, bus_generic_detach),
186 DEVMETHOD(device_suspend, acpi_suspend),
187 DEVMETHOD(device_resume, acpi_resume),
190 DEVMETHOD(bus_add_child, acpi_add_child),
191 DEVMETHOD(bus_print_child, acpi_print_child),
192 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch),
193 DEVMETHOD(bus_driver_added, acpi_driver_added),
194 DEVMETHOD(bus_read_ivar, acpi_read_ivar),
195 DEVMETHOD(bus_write_ivar, acpi_write_ivar),
196 DEVMETHOD(bus_get_resource_list, acpi_get_rlist),
197 DEVMETHOD(bus_set_resource, acpi_set_resource),
198 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
199 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource),
200 DEVMETHOD(bus_adjust_resource, acpi_adjust_resource),
201 DEVMETHOD(bus_release_resource, acpi_release_resource),
202 DEVMETHOD(bus_delete_resource, acpi_delete_resource),
203 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method),
204 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method),
205 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
206 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
207 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
208 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
209 DEVMETHOD(bus_hint_device_unit, acpi_hint_device_unit),
212 DEVMETHOD(acpi_id_probe, acpi_device_id_probe),
213 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj),
214 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep),
215 DEVMETHOD(acpi_scan_children, acpi_device_scan_children),
218 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe),
223 static driver_t acpi_driver = {
226 sizeof(struct acpi_softc),
229 static devclass_t acpi_devclass;
230 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0);
231 MODULE_VERSION(acpi, 1);
233 ACPI_SERIAL_DECL(acpi, "ACPI root bus");
235 /* Local pools for managing system resources for ACPI child devices. */
236 static struct rman acpi_rman_io, acpi_rman_mem;
238 #define ACPI_MINIMUM_AWAKETIME 5
240 /* Holds the description of the acpi0 device. */
241 static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2];
243 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging");
244 static char acpi_ca_version[12];
245 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD,
246 acpi_ca_version, 0, "Version of Intel ACPI-CA");
249 * Allow overriding _OSI methods.
251 static char acpi_install_interface[256];
252 TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface,
253 sizeof(acpi_install_interface));
254 static char acpi_remove_interface[256];
255 TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface,
256 sizeof(acpi_remove_interface));
259 * Allow override of whether methods execute in parallel or not.
260 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS"
261 * errors for AML that really can't handle parallel method execution.
262 * It is off by default since this breaks recursive methods and
263 * some IBMs use such code.
265 static int acpi_serialize_methods;
266 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods);
268 /* Allow users to dump Debug objects without ACPI debugger. */
269 static int acpi_debug_objects;
270 TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects);
271 SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects,
272 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I",
273 "Enable Debug objects");
275 /* Allow the interpreter to ignore common mistakes in BIOS. */
276 static int acpi_interpreter_slack = 1;
277 TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack);
278 SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RDTUN,
279 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode.");
282 /* Reset system clock while resuming. XXX Remove once tested. */
283 static int acpi_reset_clock = 1;
284 TUNABLE_INT("debug.acpi.reset_clock", &acpi_reset_clock);
285 SYSCTL_INT(_debug_acpi, OID_AUTO, reset_clock, CTLFLAG_RW,
286 &acpi_reset_clock, 1, "Reset system clock while resuming.");
289 /* Allow users to override quirks. */
290 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks);
292 static int acpi_susp_bounce;
293 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW,
294 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices.");
297 * ACPI can only be loaded as a module by the loader; activating it after
298 * system bootstrap time is not useful, and can be fatal to the system.
299 * It also cannot be unloaded, since the entire system bus hierarchy hangs
303 acpi_modevent(struct module *mod, int event, void *junk)
308 printf("The ACPI driver cannot be loaded after boot.\n");
313 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI)
323 * Perform early initialization.
328 static int started = 0;
332 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
334 /* Only run the startup code once. The MADT driver also calls this. */
336 return_VALUE (AE_OK);
340 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing
341 * if more tables exist.
343 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) {
344 printf("ACPI: Table initialisation failed: %s\n",
345 AcpiFormatException(status));
346 return_VALUE (status);
349 /* Set up any quirks we have for this system. */
350 if (acpi_quirks == ACPI_Q_OK)
351 acpi_table_quirks(&acpi_quirks);
353 /* If the user manually set the disabled hint to 0, force-enable ACPI. */
354 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0)
355 acpi_quirks &= ~ACPI_Q_BROKEN;
356 if (acpi_quirks & ACPI_Q_BROKEN) {
357 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n");
361 return_VALUE (status);
365 * Detect ACPI and perform early initialisation.
370 ACPI_TABLE_RSDP *rsdp;
371 ACPI_TABLE_HEADER *rsdt;
372 ACPI_PHYSICAL_ADDRESS paddr;
375 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
380 /* Check that we haven't been disabled with a hint. */
381 if (resource_disabled("acpi", 0))
384 /* Check for other PM systems. */
385 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
386 power_pm_get_type() != POWER_PM_TYPE_ACPI) {
387 printf("ACPI identify failed, other PM system enabled.\n");
391 /* Initialize root tables. */
392 if (ACPI_FAILURE(acpi_Startup())) {
393 printf("ACPI: Try disabling either ACPI or apic support.\n");
397 if ((paddr = AcpiOsGetRootPointer()) == 0 ||
398 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL)
400 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0)
401 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress;
403 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress;
404 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP));
406 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL)
408 sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN);
409 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE);
412 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE);
416 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER));
418 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION);
424 * Fetch some descriptive data from ACPI to put in our attach message.
427 acpi_probe(device_t dev)
430 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
432 device_set_desc(dev, acpi_desc);
434 return_VALUE (BUS_PROBE_NOWILDCARD);
438 acpi_attach(device_t dev)
440 struct acpi_softc *sc;
447 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
449 sc = device_get_softc(dev);
451 callout_init(&sc->susp_force_to, TRUE);
455 /* Initialize resource manager. */
456 acpi_rman_io.rm_type = RMAN_ARRAY;
457 acpi_rman_io.rm_start = 0;
458 acpi_rman_io.rm_end = 0xffff;
459 acpi_rman_io.rm_descr = "ACPI I/O ports";
460 if (rman_init(&acpi_rman_io) != 0)
461 panic("acpi rman_init IO ports failed");
462 acpi_rman_mem.rm_type = RMAN_ARRAY;
463 acpi_rman_mem.rm_start = 0;
464 acpi_rman_mem.rm_end = ~0ul;
465 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses";
466 if (rman_init(&acpi_rman_mem) != 0)
467 panic("acpi rman_init memory failed");
469 /* Initialise the ACPI mutex */
470 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF);
473 * Set the globals from our tunables. This is needed because ACPI-CA
474 * uses UINT8 for some values and we have no tunable_byte.
476 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods ? TRUE : FALSE;
477 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE;
478 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE;
482 * Disable all debugging layers and levels.
488 /* Start up the ACPI CA subsystem. */
489 status = AcpiInitializeSubsystem();
490 if (ACPI_FAILURE(status)) {
491 device_printf(dev, "Could not initialize Subsystem: %s\n",
492 AcpiFormatException(status));
496 /* Override OS interfaces if the user requested. */
497 acpi_reset_interfaces(dev);
499 /* Load ACPI name space. */
500 status = AcpiLoadTables();
501 if (ACPI_FAILURE(status)) {
502 device_printf(dev, "Could not load Namespace: %s\n",
503 AcpiFormatException(status));
507 #if defined(__i386__) || defined(__amd64__)
508 /* Handle MCFG table if present. */
513 * Note that some systems (specifically, those with namespace evaluation
514 * issues that require the avoidance of parts of the namespace) must
515 * avoid running _INI and _STA on everything, as well as dodging the final
518 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT).
520 * XXX We should arrange for the object init pass after we have attached
521 * all our child devices, but on many systems it works here.
524 if (testenv("debug.acpi.avoid"))
525 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
527 /* Bring the hardware and basic handlers online. */
528 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) {
529 device_printf(dev, "Could not enable ACPI: %s\n",
530 AcpiFormatException(status));
535 * Call the ECDT probe function to provide EC functionality before
536 * the namespace has been evaluated.
538 * XXX This happens before the sysresource devices have been probed and
539 * attached so its resources come from nexus0. In practice, this isn't
540 * a problem but should be addressed eventually.
542 acpi_ec_ecdt_probe(dev);
544 /* Bring device objects and regions online. */
545 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) {
546 device_printf(dev, "Could not initialize ACPI objects: %s\n",
547 AcpiFormatException(status));
552 * Setup our sysctl tree.
554 * XXX: This doesn't check to make sure that none of these fail.
556 sysctl_ctx_init(&sc->acpi_sysctl_ctx);
557 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx,
558 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
559 device_get_name(dev), CTLFLAG_RD, 0, "");
560 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
561 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD,
562 0, 0, acpi_supported_sleep_state_sysctl, "A", "");
563 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
564 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW,
565 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
566 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
567 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW,
568 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
569 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
570 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW,
571 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", "");
572 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
573 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW,
574 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", "");
575 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
576 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW,
577 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", "");
578 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
579 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0,
580 "sleep delay in seconds");
581 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
582 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode");
583 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
584 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode");
585 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
586 OID_AUTO, "disable_on_reboot", CTLFLAG_RW,
587 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system");
588 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
589 OID_AUTO, "handle_reboot", CTLFLAG_RW,
590 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot");
593 * Default to 1 second before sleeping to give some machines time to
596 sc->acpi_sleep_delay = 1;
598 sc->acpi_verbose = 1;
599 if ((env = getenv("hw.acpi.verbose")) != NULL) {
600 if (strcmp(env, "0") != 0)
601 sc->acpi_verbose = 1;
605 /* Only enable reboot by default if the FADT says it is available. */
606 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER)
607 sc->acpi_handle_reboot = 1;
609 /* Only enable S4BIOS by default if the FACS says it is available. */
610 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT)
613 /* Probe all supported sleep states. */
614 acpi_sleep_states[ACPI_STATE_S0] = TRUE;
615 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++)
616 if (ACPI_SUCCESS(AcpiEvaluateObject(ACPI_ROOT_OBJECT,
617 __DECONST(char *, AcpiGbl_SleepStateNames[state]), NULL, NULL)) &&
618 ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB)))
619 acpi_sleep_states[state] = TRUE;
622 * Dispatch the default sleep state to devices. The lid switch is set
623 * to UNKNOWN by default to avoid surprising users.
625 sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ?
626 ACPI_STATE_S5 : ACPI_STATE_UNKNOWN;
627 sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN;
628 sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ?
629 ACPI_STATE_S1 : ACPI_STATE_UNKNOWN;
630 sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ?
631 ACPI_STATE_S3 : ACPI_STATE_UNKNOWN;
633 /* Pick the first valid sleep state for the sleep button default. */
634 sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN;
635 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++)
636 if (acpi_sleep_states[state]) {
637 sc->acpi_sleep_button_sx = state;
641 acpi_enable_fixed_events(sc);
644 * Scan the namespace and attach/initialise children.
647 /* Register our shutdown handler. */
648 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc,
652 * Register our acpi event handlers.
653 * XXX should be configurable eg. via userland policy manager.
655 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep,
656 sc, ACPI_EVENT_PRI_LAST);
657 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup,
658 sc, ACPI_EVENT_PRI_LAST);
660 /* Flag our initial states. */
661 sc->acpi_enabled = TRUE;
662 sc->acpi_sstate = ACPI_STATE_S0;
663 sc->acpi_sleep_disabled = TRUE;
665 /* Create the control device */
666 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644,
668 sc->acpi_dev_t->si_drv1 = sc;
670 if ((error = acpi_machdep_init(dev)))
673 /* Register ACPI again to pass the correct argument of pm_func. */
674 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc);
676 if (!acpi_disabled("bus"))
677 acpi_probe_children(dev);
679 /* Update all GPEs and enable runtime GPEs. */
680 status = AcpiUpdateAllGpes();
681 if (ACPI_FAILURE(status))
682 device_printf(dev, "Could not update all GPEs: %s\n",
683 AcpiFormatException(status));
685 /* Allow sleep request after a while. */
686 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
691 return_VALUE (error);
695 acpi_set_power_children(device_t dev, int state)
697 device_t child, parent;
699 struct pci_devinfo *dinfo;
700 int dstate, i, numdevs;
702 if (device_get_children(dev, &devlist, &numdevs) != 0)
706 * Retrieve and set D-state for the sleep state if _SxD is present.
707 * Skip children who aren't attached since they are handled separately.
709 parent = device_get_parent(dev);
710 for (i = 0; i < numdevs; i++) {
712 dinfo = device_get_ivars(child);
714 if (device_is_attached(child) &&
715 acpi_device_pwr_for_sleep(parent, dev, &dstate) == 0)
716 acpi_set_powerstate(child, dstate);
718 free(devlist, M_TEMP);
722 acpi_suspend(device_t dev)
728 error = bus_generic_suspend(dev);
730 acpi_set_power_children(dev, ACPI_STATE_D3);
736 acpi_resume(device_t dev)
741 acpi_set_power_children(dev, ACPI_STATE_D0);
743 return (bus_generic_resume(dev));
747 acpi_shutdown(device_t dev)
752 /* Allow children to shutdown first. */
753 bus_generic_shutdown(dev);
756 * Enable any GPEs that are able to power-on the system (i.e., RTC).
757 * Also, disable any that are not valid for this state (most).
759 acpi_wake_prep_walk(ACPI_STATE_S5);
765 * Handle a new device being added
768 acpi_add_child(device_t bus, u_int order, const char *name, int unit)
770 struct acpi_device *ad;
773 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL)
776 resource_list_init(&ad->ad_rl);
778 child = device_add_child_ordered(bus, order, name, unit);
780 device_set_ivars(child, ad);
787 acpi_print_child(device_t bus, device_t child)
789 struct acpi_device *adev = device_get_ivars(child);
790 struct resource_list *rl = &adev->ad_rl;
793 retval += bus_print_child_header(bus, child);
794 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
795 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
796 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
797 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld");
798 if (device_get_flags(child))
799 retval += printf(" flags %#x", device_get_flags(child));
800 retval += bus_print_child_footer(bus, child);
806 * If this device is an ACPI child but no one claimed it, attempt
807 * to power it off. We'll power it back up when a driver is added.
809 * XXX Disabled for now since many necessary devices (like fdc and
810 * ATA) don't claim the devices we created for them but still expect
811 * them to be powered up.
814 acpi_probe_nomatch(device_t bus, device_t child)
816 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER
817 acpi_set_powerstate(child, ACPI_STATE_D3);
822 * If a new driver has a chance to probe a child, first power it up.
824 * XXX Disabled for now (see acpi_probe_nomatch for details).
827 acpi_driver_added(device_t dev, driver_t *driver)
829 device_t child, *devlist;
832 DEVICE_IDENTIFY(driver, dev);
833 if (device_get_children(dev, &devlist, &numdevs))
835 for (i = 0; i < numdevs; i++) {
837 if (device_get_state(child) == DS_NOTPRESENT) {
838 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER
839 acpi_set_powerstate(child, ACPI_STATE_D0);
840 if (device_probe_and_attach(child) != 0)
841 acpi_set_powerstate(child, ACPI_STATE_D3);
843 device_probe_and_attach(child);
847 free(devlist, M_TEMP);
850 /* Location hint for devctl(8) */
852 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf,
855 struct acpi_device *dinfo = device_get_ivars(child);
857 if (dinfo->ad_handle)
858 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle));
860 snprintf(buf, buflen, "unknown");
864 /* PnP information for devctl(8) */
866 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf,
869 struct acpi_device *dinfo = device_get_ivars(child);
870 ACPI_DEVICE_INFO *adinfo;
872 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) {
873 snprintf(buf, buflen, "unknown");
877 snprintf(buf, buflen, "_HID=%s _UID=%lu",
878 (adinfo->Valid & ACPI_VALID_HID) ?
879 adinfo->HardwareId.String : "none",
880 (adinfo->Valid & ACPI_VALID_UID) ?
881 strtoul(adinfo->UniqueId.String, NULL, 10) : 0UL);
888 * Handle per-device ivars
891 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
893 struct acpi_device *ad;
895 if ((ad = device_get_ivars(child)) == NULL) {
896 device_printf(child, "device has no ivars\n");
900 /* ACPI and ISA compatibility ivars */
902 case ACPI_IVAR_HANDLE:
903 *(ACPI_HANDLE *)result = ad->ad_handle;
905 case ACPI_IVAR_PRIVATE:
906 *(void **)result = ad->ad_private;
908 case ACPI_IVAR_FLAGS:
909 *(int *)result = ad->ad_flags;
911 case ISA_IVAR_VENDORID:
912 case ISA_IVAR_SERIAL:
913 case ISA_IVAR_COMPATID:
916 case ISA_IVAR_LOGICALID:
917 *(int *)result = acpi_isa_get_logicalid(child);
927 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value)
929 struct acpi_device *ad;
931 if ((ad = device_get_ivars(child)) == NULL) {
932 device_printf(child, "device has no ivars\n");
937 case ACPI_IVAR_HANDLE:
938 ad->ad_handle = (ACPI_HANDLE)value;
940 case ACPI_IVAR_PRIVATE:
941 ad->ad_private = (void *)value;
943 case ACPI_IVAR_FLAGS:
944 ad->ad_flags = (int)value;
947 panic("bad ivar write request (%d)", index);
955 * Handle child resource allocation/removal
957 static struct resource_list *
958 acpi_get_rlist(device_t dev, device_t child)
960 struct acpi_device *ad;
962 ad = device_get_ivars(child);
967 acpi_match_resource_hint(device_t dev, int type, long value)
969 struct acpi_device *ad = device_get_ivars(dev);
970 struct resource_list *rl = &ad->ad_rl;
971 struct resource_list_entry *rle;
973 STAILQ_FOREACH(rle, rl, link) {
974 if (rle->type != type)
976 if (rle->start <= value && rle->end >= value)
983 * Wire device unit numbers based on resource matches in hints.
986 acpi_hint_device_unit(device_t acdev, device_t child, const char *name,
991 int line, matches, unit;
994 * Iterate over all the hints for the devices with the specified
995 * name to see if one's resources are a subset of this device.
999 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0)
1002 /* Must have an "at" for acpi or isa. */
1003 resource_string_value(name, unit, "at", &s);
1004 if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 ||
1005 strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0))
1009 * Check for matching resources. We must have at least one match.
1010 * Since I/O and memory resources cannot be shared, if we get a
1011 * match on either of those, ignore any mismatches in IRQs or DRQs.
1013 * XXX: We may want to revisit this to be more lenient and wire
1014 * as long as it gets one match.
1017 if (resource_long_value(name, unit, "port", &value) == 0) {
1019 * Floppy drive controllers are notorious for having a
1020 * wide variety of resources not all of which include the
1021 * first port that is specified by the hint (typically
1022 * 0x3f0) (see the comment above fdc_isa_alloc_resources()
1023 * in fdc_isa.c). However, they do all seem to include
1024 * port + 2 (e.g. 0x3f2) so for a floppy device, look for
1025 * 'value + 2' in the port resources instead of the hint
1028 if (strcmp(name, "fdc") == 0)
1030 if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value))
1035 if (resource_long_value(name, unit, "maddr", &value) == 0) {
1036 if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value))
1043 if (resource_long_value(name, unit, "irq", &value) == 0) {
1044 if (acpi_match_resource_hint(child, SYS_RES_IRQ, value))
1049 if (resource_long_value(name, unit, "drq", &value) == 0) {
1050 if (acpi_match_resource_hint(child, SYS_RES_DRQ, value))
1058 /* We have a winner! */
1066 * Pre-allocate/manage all memory and IO resources. Since rman can't handle
1067 * duplicates, we merge any in the sysresource attach routine.
1070 acpi_sysres_alloc(device_t dev)
1072 struct resource *res;
1073 struct resource_list *rl;
1074 struct resource_list_entry *rle;
1076 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
1081 * Probe/attach any sysresource devices. This would be unnecessary if we
1082 * had multi-pass probe/attach.
1084 if (device_get_children(dev, &children, &child_count) != 0)
1086 for (i = 0; i < child_count; i++) {
1087 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
1088 device_probe_and_attach(children[i]);
1090 free(children, M_TEMP);
1092 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev);
1093 STAILQ_FOREACH(rle, rl, link) {
1094 if (rle->res != NULL) {
1095 device_printf(dev, "duplicate resource for %lx\n", rle->start);
1099 /* Only memory and IO resources are valid here. */
1100 switch (rle->type) {
1101 case SYS_RES_IOPORT:
1104 case SYS_RES_MEMORY:
1105 rm = &acpi_rman_mem;
1111 /* Pre-allocate resource and add to our rman pool. */
1112 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type,
1113 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0);
1115 rman_manage_region(rm, rman_get_start(res), rman_get_end(res));
1118 device_printf(dev, "reservation of %lx, %lx (%d) failed\n",
1119 rle->start, rle->count, rle->type);
1124 static char *pcilink_ids[] = { "PNP0C0F", NULL };
1125 static char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
1128 * Reserve declared resources for devices found during attach once system
1129 * resources have been allocated.
1132 acpi_reserve_resources(device_t dev)
1134 struct resource_list_entry *rle;
1135 struct resource_list *rl;
1136 struct acpi_device *ad;
1137 struct acpi_softc *sc;
1141 sc = device_get_softc(dev);
1142 if (device_get_children(dev, &children, &child_count) != 0)
1144 for (i = 0; i < child_count; i++) {
1145 ad = device_get_ivars(children[i]);
1148 /* Don't reserve system resources. */
1149 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
1152 STAILQ_FOREACH(rle, rl, link) {
1154 * Don't reserve IRQ resources. There are many sticky things
1155 * to get right otherwise (e.g. IRQs for psm, atkbd, and HPET
1156 * when using legacy routing).
1158 if (rle->type == SYS_RES_IRQ)
1162 * Don't reserve the resource if it is already allocated.
1163 * The acpi_ec(4) driver can allocate its resources early
1164 * if ECDT is present.
1166 if (rle->res != NULL)
1170 * Try to reserve the resource from our parent. If this
1171 * fails because the resource is a system resource, just
1172 * let it be. The resource range is already reserved so
1173 * that other devices will not use it. If the driver
1174 * needs to allocate the resource, then
1175 * acpi_alloc_resource() will sub-alloc from the system
1178 resource_list_reserve(rl, dev, children[i], rle->type, &rle->rid,
1179 rle->start, rle->end, rle->count, 0);
1182 free(children, M_TEMP);
1183 sc->acpi_resources_reserved = 1;
1187 acpi_set_resource(device_t dev, device_t child, int type, int rid,
1188 u_long start, u_long count)
1190 struct acpi_softc *sc = device_get_softc(dev);
1191 struct acpi_device *ad = device_get_ivars(child);
1192 struct resource_list *rl = &ad->ad_rl;
1195 /* Ignore IRQ resources for PCI link devices. */
1196 if (type == SYS_RES_IRQ && ACPI_ID_PROBE(dev, child, pcilink_ids) != NULL)
1199 /* If the resource is already allocated, fail. */
1200 if (resource_list_busy(rl, type, rid))
1203 /* If the resource is already reserved, release it. */
1204 if (resource_list_reserved(rl, type, rid))
1205 resource_list_unreserve(rl, dev, child, type, rid);
1207 /* Add the resource. */
1208 end = (start + count - 1);
1209 resource_list_add(rl, type, rid, start, end, count);
1211 /* Don't reserve resources until the system resources are allocated. */
1212 if (!sc->acpi_resources_reserved)
1215 /* Don't reserve system resources. */
1216 if (ACPI_ID_PROBE(dev, child, sysres_ids) != NULL)
1220 * Don't reserve IRQ resources. There are many sticky things to
1221 * get right otherwise (e.g. IRQs for psm, atkbd, and HPET when
1222 * using legacy routing).
1224 if (type == SYS_RES_IRQ)
1228 * Reserve the resource.
1230 * XXX: Ignores failure for now. Failure here is probably a
1231 * BIOS/firmware bug?
1233 resource_list_reserve(rl, dev, child, type, &rid, start, end, count, 0);
1237 static struct resource *
1238 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
1239 u_long start, u_long end, u_long count, u_int flags)
1242 struct acpi_device *ad;
1243 struct resource_list_entry *rle;
1244 struct resource_list *rl;
1245 struct resource *res;
1246 int isdefault = (start == 0UL && end == ~0UL);
1249 * First attempt at allocating the resource. For direct children,
1250 * use resource_list_alloc() to handle reserved resources. For
1251 * other devices, pass the request up to our parent.
1253 if (bus == device_get_parent(child)) {
1254 ad = device_get_ivars(child);
1258 * Simulate the behavior of the ISA bus for direct children
1259 * devices. That is, if a non-default range is specified for
1260 * a resource that doesn't exist, use bus_set_resource() to
1261 * add the resource before allocating it. Note that these
1262 * resources will not be reserved.
1264 if (!isdefault && resource_list_find(rl, type, *rid) == NULL)
1265 resource_list_add(rl, type, *rid, start, end, count);
1266 res = resource_list_alloc(rl, bus, child, type, rid, start, end, count,
1268 if (res != NULL && type == SYS_RES_IRQ) {
1270 * Since bus_config_intr() takes immediate effect, we cannot
1271 * configure the interrupt associated with a device when we
1272 * parse the resources but have to defer it until a driver
1273 * actually allocates the interrupt via bus_alloc_resource().
1275 * XXX: Should we handle the lookup failing?
1277 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares)))
1278 acpi_config_intr(child, &ares);
1282 * If this is an allocation of the "default" range for a given
1283 * RID, fetch the exact bounds for this resource from the
1284 * resource list entry to try to allocate the range from the
1285 * system resource regions.
1287 if (res == NULL && isdefault) {
1288 rle = resource_list_find(rl, type, *rid);
1296 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid,
1297 start, end, count, flags);
1300 * If the first attempt failed and this is an allocation of a
1301 * specific range, try to satisfy the request via a suballocation
1302 * from our system resource regions.
1304 if (res == NULL && start + count - 1 == end)
1305 res = acpi_alloc_sysres(child, type, rid, start, end, count, flags);
1310 * Attempt to allocate a specific resource range from the system
1311 * resource ranges. Note that we only handle memory and I/O port
1315 acpi_alloc_sysres(device_t child, int type, int *rid, u_long start, u_long end,
1316 u_long count, u_int flags)
1319 struct resource *res;
1322 case SYS_RES_IOPORT:
1325 case SYS_RES_MEMORY:
1326 rm = &acpi_rman_mem;
1332 KASSERT(start + count - 1 == end, ("wildcard resource range"));
1333 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE,
1338 rman_set_rid(res, *rid);
1340 /* If requested, activate the resource using the parent's method. */
1341 if (flags & RF_ACTIVE)
1342 if (bus_activate_resource(child, type, *rid, res) != 0) {
1343 rman_release_resource(res);
1351 acpi_is_resource_managed(int type, struct resource *r)
1354 /* We only handle memory and IO resources through rman. */
1356 case SYS_RES_IOPORT:
1357 return (rman_is_region_manager(r, &acpi_rman_io));
1358 case SYS_RES_MEMORY:
1359 return (rman_is_region_manager(r, &acpi_rman_mem));
1365 acpi_adjust_resource(device_t bus, device_t child, int type, struct resource *r,
1366 u_long start, u_long end)
1369 if (acpi_is_resource_managed(type, r))
1370 return (rman_adjust_resource(r, start, end));
1371 return (bus_generic_adjust_resource(bus, child, type, r, start, end));
1375 acpi_release_resource(device_t bus, device_t child, int type, int rid,
1381 * If this resource belongs to one of our internal managers,
1382 * deactivate it and release it to the local pool.
1384 if (acpi_is_resource_managed(type, r)) {
1385 if (rman_get_flags(r) & RF_ACTIVE) {
1386 ret = bus_deactivate_resource(child, type, rid, r);
1390 return (rman_release_resource(r));
1393 return (bus_generic_rl_release_resource(bus, child, type, rid, r));
1397 acpi_delete_resource(device_t bus, device_t child, int type, int rid)
1399 struct resource_list *rl;
1401 rl = acpi_get_rlist(bus, child);
1402 if (resource_list_busy(rl, type, rid)) {
1403 device_printf(bus, "delete_resource: Resource still owned by child"
1404 " (type=%d, rid=%d)\n", type, rid);
1407 resource_list_unreserve(rl, bus, child, type, rid);
1408 resource_list_delete(rl, type, rid);
1411 /* Allocate an IO port or memory resource, given its GAS. */
1413 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas,
1414 struct resource **res, u_int flags)
1416 int error, res_type;
1419 if (type == NULL || rid == NULL || gas == NULL || res == NULL)
1422 /* We only support memory and IO spaces. */
1423 switch (gas->SpaceId) {
1424 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
1425 res_type = SYS_RES_MEMORY;
1427 case ACPI_ADR_SPACE_SYSTEM_IO:
1428 res_type = SYS_RES_IOPORT;
1431 return (EOPNOTSUPP);
1435 * If the register width is less than 8, assume the BIOS author means
1436 * it is a bit field and just allocate a byte.
1438 if (gas->BitWidth && gas->BitWidth < 8)
1441 /* Validate the address after we're sure we support the space. */
1442 if (gas->Address == 0 || gas->BitWidth == 0)
1445 bus_set_resource(dev, res_type, *rid, gas->Address,
1447 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags);
1452 bus_delete_resource(dev, res_type, *rid);
1457 /* Probe _HID and _CID for compatible ISA PNP ids. */
1459 acpi_isa_get_logicalid(device_t dev)
1461 ACPI_DEVICE_INFO *devinfo;
1465 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1467 /* Fetch and validate the HID. */
1468 if ((h = acpi_get_handle(dev)) == NULL ||
1469 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1472 pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 &&
1473 devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ?
1474 PNP_EISAID(devinfo->HardwareId.String) : 0;
1475 AcpiOsFree(devinfo);
1477 return_VALUE (pnpid);
1481 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count)
1483 ACPI_DEVICE_INFO *devinfo;
1484 ACPI_PNP_DEVICE_ID *ids;
1489 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1493 /* Fetch and validate the CID */
1494 if ((h = acpi_get_handle(dev)) == NULL ||
1495 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1498 if ((devinfo->Valid & ACPI_VALID_CID) == 0) {
1499 AcpiOsFree(devinfo);
1503 if (devinfo->CompatibleIdList.Count < count)
1504 count = devinfo->CompatibleIdList.Count;
1505 ids = devinfo->CompatibleIdList.Ids;
1506 for (i = 0, valid = 0; i < count; i++)
1507 if (ids[i].Length >= ACPI_EISAID_STRING_SIZE &&
1508 strncmp(ids[i].String, "PNP", 3) == 0) {
1509 *pnpid++ = PNP_EISAID(ids[i].String);
1512 AcpiOsFree(devinfo);
1514 return_VALUE (valid);
1518 acpi_device_id_probe(device_t bus, device_t dev, char **ids)
1524 h = acpi_get_handle(dev);
1525 if (ids == NULL || h == NULL)
1527 t = acpi_get_type(dev);
1528 if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR)
1531 /* Try to match one of the array of IDs with a HID or CID. */
1532 for (i = 0; ids[i] != NULL; i++) {
1533 if (acpi_MatchHid(h, ids[i]))
1540 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname,
1541 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret)
1546 h = ACPI_ROOT_OBJECT;
1547 else if ((h = acpi_get_handle(dev)) == NULL)
1548 return (AE_BAD_PARAMETER);
1549 return (AcpiEvaluateObject(h, pathname, parameters, ret));
1553 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate)
1555 struct acpi_softc *sc;
1560 handle = acpi_get_handle(dev);
1563 * XXX If we find these devices, don't try to power them down.
1564 * The serial and IRDA ports on my T23 hang the system when
1565 * set to D3 and it appears that such legacy devices may
1566 * need special handling in their drivers.
1568 if (dstate == NULL || handle == NULL ||
1569 acpi_MatchHid(handle, "PNP0500") ||
1570 acpi_MatchHid(handle, "PNP0501") ||
1571 acpi_MatchHid(handle, "PNP0502") ||
1572 acpi_MatchHid(handle, "PNP0510") ||
1573 acpi_MatchHid(handle, "PNP0511"))
1577 * Override next state with the value from _SxD, if present.
1578 * Note illegal _S0D is evaluated because some systems expect this.
1580 sc = device_get_softc(bus);
1581 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate);
1582 status = acpi_GetInteger(handle, sxd, dstate);
1583 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
1584 device_printf(dev, "failed to get %s on %s: %s\n", sxd,
1585 acpi_name(handle), AcpiFormatException(status));
1592 /* Callback arg for our implementation of walking the namespace. */
1593 struct acpi_device_scan_ctx {
1594 acpi_scan_cb_t user_fn;
1600 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval)
1602 struct acpi_device_scan_ctx *ctx;
1603 device_t dev, old_dev;
1605 ACPI_OBJECT_TYPE type;
1608 * Skip this device if we think we'll have trouble with it or it is
1609 * the parent where the scan began.
1611 ctx = (struct acpi_device_scan_ctx *)arg;
1612 if (acpi_avoid(h) || h == ctx->parent)
1615 /* If this is not a valid device type (e.g., a method), skip it. */
1616 if (ACPI_FAILURE(AcpiGetType(h, &type)))
1618 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR &&
1619 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER)
1623 * Call the user function with the current device. If it is unchanged
1624 * afterwards, return. Otherwise, we update the handle to the new dev.
1626 old_dev = acpi_get_device(h);
1628 status = ctx->user_fn(h, &dev, level, ctx->arg);
1629 if (ACPI_FAILURE(status) || old_dev == dev)
1632 /* Remove the old child and its connection to the handle. */
1633 if (old_dev != NULL) {
1634 device_delete_child(device_get_parent(old_dev), old_dev);
1635 AcpiDetachData(h, acpi_fake_objhandler);
1638 /* Recreate the handle association if the user created a device. */
1640 AcpiAttachData(h, acpi_fake_objhandler, dev);
1646 acpi_device_scan_children(device_t bus, device_t dev, int max_depth,
1647 acpi_scan_cb_t user_fn, void *arg)
1650 struct acpi_device_scan_ctx ctx;
1652 if (acpi_disabled("children"))
1656 h = ACPI_ROOT_OBJECT;
1657 else if ((h = acpi_get_handle(dev)) == NULL)
1658 return (AE_BAD_PARAMETER);
1659 ctx.user_fn = user_fn;
1662 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth,
1663 acpi_device_scan_cb, NULL, &ctx, NULL));
1667 * Even though ACPI devices are not PCI, we use the PCI approach for setting
1668 * device power states since it's close enough to ACPI.
1671 acpi_set_powerstate(device_t child, int state)
1676 h = acpi_get_handle(child);
1677 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX)
1682 /* Ignore errors if the power methods aren't present. */
1683 status = acpi_pwr_switch_consumer(h, state);
1684 if (ACPI_SUCCESS(status)) {
1686 device_printf(child, "set ACPI power state D%d on %s\n",
1687 state, acpi_name(h));
1688 } else if (status != AE_NOT_FOUND)
1689 device_printf(child,
1690 "failed to set ACPI power state D%d on %s: %s\n", state,
1691 acpi_name(h), AcpiFormatException(status));
1697 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
1699 int result, cid_count, i;
1700 uint32_t lid, cids[8];
1702 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1705 * ISA-style drivers attached to ACPI may persist and
1706 * probe manually if we return ENOENT. We never want
1707 * that to happen, so don't ever return it.
1711 /* Scan the supplied IDs for a match */
1712 lid = acpi_isa_get_logicalid(child);
1713 cid_count = acpi_isa_get_compatid(child, cids, 8);
1714 while (ids && ids->ip_id) {
1715 if (lid == ids->ip_id) {
1719 for (i = 0; i < cid_count; i++) {
1720 if (cids[i] == ids->ip_id) {
1729 if (result == 0 && ids->ip_desc)
1730 device_set_desc(child, ids->ip_desc);
1732 return_VALUE (result);
1735 #if defined(__i386__) || defined(__amd64__)
1737 * Look for a MCFG table. If it is present, use the settings for
1738 * domain (segment) 0 to setup PCI config space access via the memory
1742 acpi_enable_pcie(void)
1744 ACPI_TABLE_HEADER *hdr;
1745 ACPI_MCFG_ALLOCATION *alloc, *end;
1748 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr);
1749 if (ACPI_FAILURE(status))
1752 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length);
1753 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1);
1754 while (alloc < end) {
1755 if (alloc->PciSegment == 0) {
1756 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber,
1757 alloc->EndBusNumber);
1766 * Scan all of the ACPI namespace and attach child devices.
1768 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and
1769 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec.
1770 * However, in violation of the spec, some systems place their PCI link
1771 * devices in \, so we have to walk the whole namespace. We check the
1772 * type of namespace nodes, so this should be ok.
1775 acpi_probe_children(device_t bus)
1778 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1781 * Scan the namespace and insert placeholders for all the devices that
1782 * we find. We also probe/attach any early devices.
1784 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because
1785 * we want to create nodes for all devices, not just those that are
1786 * currently present. (This assumes that we don't want to create/remove
1787 * devices as they appear, which might be smarter.)
1789 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n"));
1790 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child,
1793 /* Pre-allocate resources for our rman from any sysresource devices. */
1794 acpi_sysres_alloc(bus);
1796 /* Reserve resources already allocated to children. */
1797 acpi_reserve_resources(bus);
1799 /* Create any static children by calling device identify methods. */
1800 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n"));
1801 bus_generic_probe(bus);
1803 /* Probe/attach all children, created statically and from the namespace. */
1804 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n"));
1805 bus_generic_attach(bus);
1807 /* Attach wake sysctls. */
1808 acpi_wake_sysctl_walk(bus);
1810 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n"));
1815 * Determine the probe order for a given device.
1818 acpi_probe_order(ACPI_HANDLE handle, int *order)
1820 ACPI_OBJECT_TYPE type;
1824 * 1. I/O port and memory system resource holders
1825 * 2. Clocks and timers (to handle early accesses)
1826 * 3. Embedded controllers (to handle early accesses)
1827 * 4. PCI Link Devices
1829 AcpiGetType(handle, &type);
1830 if (type == ACPI_TYPE_PROCESSOR)
1832 else if (acpi_MatchHid(handle, "PNP0C01") ||
1833 acpi_MatchHid(handle, "PNP0C02"))
1835 else if (acpi_MatchHid(handle, "PNP0100") ||
1836 acpi_MatchHid(handle, "PNP0103") ||
1837 acpi_MatchHid(handle, "PNP0B00"))
1839 else if (acpi_MatchHid(handle, "PNP0C09"))
1841 else if (acpi_MatchHid(handle, "PNP0C0F"))
1846 * Evaluate a child device and determine whether we might attach a device to
1850 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
1852 struct acpi_prw_data prw;
1853 ACPI_OBJECT_TYPE type;
1855 device_t bus, child;
1859 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1861 if (acpi_disabled("children"))
1862 return_ACPI_STATUS (AE_OK);
1864 /* Skip this device if we think we'll have trouble with it. */
1865 if (acpi_avoid(handle))
1866 return_ACPI_STATUS (AE_OK);
1868 bus = (device_t)context;
1869 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) {
1870 handle_str = acpi_name(handle);
1872 case ACPI_TYPE_DEVICE:
1874 * Since we scan from \, be sure to skip system scope objects.
1875 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around
1876 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run
1877 * during the intialization and \_TZ_ is to support Notify() on it.
1879 if (strcmp(handle_str, "\\_SB_") == 0 ||
1880 strcmp(handle_str, "\\_TZ_") == 0)
1882 if (acpi_parse_prw(handle, &prw) == 0)
1883 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit);
1886 * Ignore devices that do not have a _HID or _CID. They should
1887 * be discovered by other buses (e.g. the PCI bus driver).
1889 if (!acpi_has_hid(handle))
1892 case ACPI_TYPE_PROCESSOR:
1893 case ACPI_TYPE_THERMAL:
1894 case ACPI_TYPE_POWER:
1896 * Create a placeholder device for this node. Sort the
1897 * placeholder so that the probe/attach passes will run
1898 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER
1899 * are reserved for special objects (i.e., system
1902 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str));
1903 order = level * 10 + ACPI_DEV_BASE_ORDER;
1904 acpi_probe_order(handle, &order);
1905 child = BUS_ADD_CHILD(bus, order, NULL, -1);
1909 /* Associate the handle with the device_t and vice versa. */
1910 acpi_set_handle(child, handle);
1911 AcpiAttachData(handle, acpi_fake_objhandler, child);
1914 * Check that the device is present. If it's not present,
1915 * leave it disabled (so that we have a device_t attached to
1916 * the handle, but we don't probe it).
1918 * XXX PCI link devices sometimes report "present" but not
1919 * "functional" (i.e. if disabled). Go ahead and probe them
1920 * anyway since we may enable them later.
1922 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) {
1923 /* Never disable PCI link devices. */
1924 if (acpi_MatchHid(handle, "PNP0C0F"))
1927 * Docking stations should remain enabled since the system
1928 * may be undocked at boot.
1930 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h)))
1933 device_disable(child);
1938 * Get the device's resource settings and attach them.
1939 * Note that if the device has _PRS but no _CRS, we need
1940 * to decide when it's appropriate to try to configure the
1941 * device. Ignore the return value here; it's OK for the
1942 * device not to have any resources.
1944 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL);
1949 return_ACPI_STATUS (AE_OK);
1953 * AcpiAttachData() requires an object handler but never uses it. This is a
1954 * placeholder object handler so we can store a device_t in an ACPI_HANDLE.
1957 acpi_fake_objhandler(ACPI_HANDLE h, void *data)
1962 acpi_shutdown_final(void *arg, int howto)
1964 struct acpi_softc *sc = (struct acpi_softc *)arg;
1969 * XXX Shutdown code should only run on the BSP (cpuid 0).
1970 * Some chipsets do not power off the system correctly if called from
1973 if ((howto & RB_POWEROFF) != 0) {
1974 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5);
1975 if (ACPI_FAILURE(status)) {
1976 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
1977 AcpiFormatException(status));
1980 device_printf(sc->acpi_dev, "Powering system off\n");
1981 intr = intr_disable();
1982 status = AcpiEnterSleepState(ACPI_STATE_S5);
1983 if (ACPI_FAILURE(status)) {
1985 device_printf(sc->acpi_dev, "power-off failed - %s\n",
1986 AcpiFormatException(status));
1990 device_printf(sc->acpi_dev, "power-off failed - timeout\n");
1992 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) {
1993 /* Reboot using the reset register. */
1994 status = AcpiReset();
1995 if (ACPI_SUCCESS(status)) {
1997 device_printf(sc->acpi_dev, "reset failed - timeout\n");
1998 } else if (status != AE_NOT_EXIST)
1999 device_printf(sc->acpi_dev, "reset failed - %s\n",
2000 AcpiFormatException(status));
2001 } else if (sc->acpi_do_disable && panicstr == NULL) {
2003 * Only disable ACPI if the user requested. On some systems, writing
2004 * the disable value to SMI_CMD hangs the system.
2006 device_printf(sc->acpi_dev, "Shutting down\n");
2012 acpi_enable_fixed_events(struct acpi_softc *sc)
2014 static int first_time = 1;
2016 /* Enable and clear fixed events and install handlers. */
2017 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) {
2018 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
2019 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
2020 acpi_event_power_button_sleep, sc);
2022 device_printf(sc->acpi_dev, "Power Button (fixed)\n");
2024 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
2025 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON);
2026 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON,
2027 acpi_event_sleep_button_sleep, sc);
2029 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n");
2036 * Returns true if the device is actually present and should
2037 * be attached to. This requires the present, enabled, UI-visible
2038 * and diagnostics-passed bits to be set.
2041 acpi_DeviceIsPresent(device_t dev)
2043 ACPI_DEVICE_INFO *devinfo;
2047 if ((h = acpi_get_handle(dev)) == NULL ||
2048 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2051 /* If no _STA method, must be present */
2052 present = (devinfo->Valid & ACPI_VALID_STA) == 0 ||
2053 ACPI_DEVICE_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE;
2055 AcpiOsFree(devinfo);
2060 * Returns true if the battery is actually present and inserted.
2063 acpi_BatteryIsPresent(device_t dev)
2065 ACPI_DEVICE_INFO *devinfo;
2069 if ((h = acpi_get_handle(dev)) == NULL ||
2070 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2073 /* If no _STA method, must be present */
2074 present = (devinfo->Valid & ACPI_VALID_STA) == 0 ||
2075 ACPI_BATTERY_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE;
2077 AcpiOsFree(devinfo);
2082 * Returns true if a device has at least one valid device ID.
2085 acpi_has_hid(ACPI_HANDLE h)
2087 ACPI_DEVICE_INFO *devinfo;
2091 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2095 if ((devinfo->Valid & ACPI_VALID_HID) != 0)
2097 else if ((devinfo->Valid & ACPI_VALID_CID) != 0)
2098 if (devinfo->CompatibleIdList.Count > 0)
2101 AcpiOsFree(devinfo);
2106 * Match a HID string against a handle
2109 acpi_MatchHid(ACPI_HANDLE h, const char *hid)
2111 ACPI_DEVICE_INFO *devinfo;
2115 if (hid == NULL || h == NULL ||
2116 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2120 if ((devinfo->Valid & ACPI_VALID_HID) != 0 &&
2121 strcmp(hid, devinfo->HardwareId.String) == 0)
2123 else if ((devinfo->Valid & ACPI_VALID_CID) != 0)
2124 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) {
2125 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) {
2131 AcpiOsFree(devinfo);
2136 * Return the handle of a named object within our scope, ie. that of (parent)
2137 * or one if its parents.
2140 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result)
2145 /* Walk back up the tree to the root */
2147 status = AcpiGetHandle(parent, path, &r);
2148 if (ACPI_SUCCESS(status)) {
2152 /* XXX Return error here? */
2153 if (status != AE_NOT_FOUND)
2155 if (ACPI_FAILURE(AcpiGetParent(parent, &r)))
2156 return (AE_NOT_FOUND);
2162 * Allocate a buffer with a preset data size.
2165 acpi_AllocBuffer(int size)
2169 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL)
2172 buf->Pointer = (void *)(buf + 1);
2177 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number)
2180 ACPI_OBJECT_LIST args;
2182 arg1.Type = ACPI_TYPE_INTEGER;
2183 arg1.Integer.Value = number;
2185 args.Pointer = &arg1;
2187 return (AcpiEvaluateObject(handle, path, &args, NULL));
2191 * Evaluate a path that should return an integer.
2194 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number)
2201 handle = ACPI_ROOT_OBJECT;
2204 * Assume that what we've been pointed at is an Integer object, or
2205 * a method that will return an Integer.
2207 buf.Pointer = ¶m;
2208 buf.Length = sizeof(param);
2209 status = AcpiEvaluateObject(handle, path, NULL, &buf);
2210 if (ACPI_SUCCESS(status)) {
2211 if (param.Type == ACPI_TYPE_INTEGER)
2212 *number = param.Integer.Value;
2218 * In some applications, a method that's expected to return an Integer
2219 * may instead return a Buffer (probably to simplify some internal
2220 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer,
2221 * convert it into an Integer as best we can.
2225 if (status == AE_BUFFER_OVERFLOW) {
2226 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) {
2227 status = AE_NO_MEMORY;
2229 status = AcpiEvaluateObject(handle, path, NULL, &buf);
2230 if (ACPI_SUCCESS(status))
2231 status = acpi_ConvertBufferToInteger(&buf, number);
2232 AcpiOsFree(buf.Pointer);
2239 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number)
2245 p = (ACPI_OBJECT *)bufp->Pointer;
2246 if (p->Type == ACPI_TYPE_INTEGER) {
2247 *number = p->Integer.Value;
2250 if (p->Type != ACPI_TYPE_BUFFER)
2252 if (p->Buffer.Length > sizeof(int))
2253 return (AE_BAD_DATA);
2256 val = p->Buffer.Pointer;
2257 for (i = 0; i < p->Buffer.Length; i++)
2258 *number += val[i] << (i * 8);
2263 * Iterate over the elements of an a package object, calling the supplied
2264 * function for each element.
2266 * XXX possible enhancement might be to abort traversal on error.
2269 acpi_ForeachPackageObject(ACPI_OBJECT *pkg,
2270 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg)
2275 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE)
2276 return (AE_BAD_PARAMETER);
2278 /* Iterate over components */
2280 comp = pkg->Package.Elements;
2281 for (; i < pkg->Package.Count; i++, comp++)
2288 * Find the (index)th resource object in a set.
2291 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp)
2296 rp = (ACPI_RESOURCE *)buf->Pointer;
2300 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2301 return (AE_BAD_PARAMETER);
2303 /* Check for terminator */
2304 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2305 return (AE_NOT_FOUND);
2306 rp = ACPI_NEXT_RESOURCE(rp);
2315 * Append an ACPI_RESOURCE to an ACPI_BUFFER.
2317 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER
2318 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible
2319 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of
2322 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512
2325 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
2330 /* Initialise the buffer if necessary. */
2331 if (buf->Pointer == NULL) {
2332 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE;
2333 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL)
2334 return (AE_NO_MEMORY);
2335 rp = (ACPI_RESOURCE *)buf->Pointer;
2336 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2337 rp->Length = ACPI_RS_SIZE_MIN;
2343 * Scan the current buffer looking for the terminator.
2344 * This will either find the terminator or hit the end
2345 * of the buffer and return an error.
2347 rp = (ACPI_RESOURCE *)buf->Pointer;
2349 /* Range check, don't go outside the buffer */
2350 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2351 return (AE_BAD_PARAMETER);
2352 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2354 rp = ACPI_NEXT_RESOURCE(rp);
2358 * Check the size of the buffer and expand if required.
2361 * size of existing resources before terminator +
2362 * size of new resource and header +
2363 * size of terminator.
2365 * Note that this loop should really only run once, unless
2366 * for some reason we are stuffing a *really* huge resource.
2368 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) +
2369 res->Length + ACPI_RS_SIZE_NO_DATA +
2370 ACPI_RS_SIZE_MIN) >= buf->Length) {
2371 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL)
2372 return (AE_NO_MEMORY);
2373 bcopy(buf->Pointer, newp, buf->Length);
2374 rp = (ACPI_RESOURCE *)((u_int8_t *)newp +
2375 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer));
2376 AcpiOsFree(buf->Pointer);
2377 buf->Pointer = newp;
2378 buf->Length += buf->Length;
2381 /* Insert the new resource. */
2382 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA);
2384 /* And add the terminator. */
2385 rp = ACPI_NEXT_RESOURCE(rp);
2386 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2387 rp->Length = ACPI_RS_SIZE_MIN;
2393 * Set interrupt model.
2396 acpi_SetIntrModel(int model)
2399 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model));
2403 * Walk subtables of a table and call a callback routine for each
2404 * subtable. The caller should provide the first subtable and a
2405 * pointer to the end of the table. This can be used to walk tables
2406 * such as MADT and SRAT that use subtable entries.
2409 acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler,
2412 ACPI_SUBTABLE_HEADER *entry;
2414 for (entry = first; (void *)entry < end; ) {
2415 /* Avoid an infinite loop if we hit a bogus entry. */
2416 if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER))
2419 handler(entry, arg);
2420 entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length);
2425 * DEPRECATED. This interface has serious deficiencies and will be
2428 * Immediately enter the sleep state. In the old model, acpiconf(8) ran
2429 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this.
2432 acpi_SetSleepState(struct acpi_softc *sc, int state)
2437 device_printf(sc->acpi_dev,
2438 "warning: acpi_SetSleepState() deprecated, need to update your software\n");
2441 return (acpi_EnterSleepState(sc, state));
2444 #if defined(__amd64__) || defined(__i386__)
2446 acpi_sleep_force_task(void *context)
2448 struct acpi_softc *sc = (struct acpi_softc *)context;
2450 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2451 device_printf(sc->acpi_dev, "force sleep state S%d failed\n",
2452 sc->acpi_next_sstate);
2456 acpi_sleep_force(void *arg)
2458 struct acpi_softc *sc = (struct acpi_softc *)arg;
2460 device_printf(sc->acpi_dev,
2461 "suspend request timed out, forcing sleep now\n");
2463 * XXX Suspending from callout cause the freeze in DEVICE_SUSPEND().
2464 * Suspend from acpi_task thread in stead.
2466 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
2467 acpi_sleep_force_task, sc)))
2468 device_printf(sc->acpi_dev, "AcpiOsExecute() for sleeping failed\n");
2473 * Request that the system enter the given suspend state. All /dev/apm
2474 * devices and devd(8) will be notified. Userland then has a chance to
2475 * save state and acknowledge the request. The system sleeps once all
2479 acpi_ReqSleepState(struct acpi_softc *sc, int state)
2481 #if defined(__amd64__) || defined(__i386__)
2482 struct apm_clone_data *clone;
2485 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX)
2487 if (!acpi_sleep_states[state])
2488 return (EOPNOTSUPP);
2490 /* If a suspend request is already in progress, just return. */
2491 if (sc->acpi_next_sstate != 0) {
2495 /* Wait until sleep is enabled. */
2496 while (sc->acpi_sleep_disabled) {
2502 sc->acpi_next_sstate = state;
2504 /* S5 (soft-off) should be entered directly with no waiting. */
2505 if (state == ACPI_STATE_S5) {
2507 status = acpi_EnterSleepState(sc, state);
2508 return (ACPI_SUCCESS(status) ? 0 : ENXIO);
2511 /* Record the pending state and notify all apm devices. */
2512 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2513 clone->notify_status = APM_EV_NONE;
2514 if ((clone->flags & ACPI_EVF_DEVD) == 0) {
2515 selwakeuppri(&clone->sel_read, PZERO);
2516 KNOTE_LOCKED(&clone->sel_read.si_note, 0);
2520 /* If devd(8) is not running, immediately enter the sleep state. */
2521 if (!devctl_process_running()) {
2523 status = acpi_EnterSleepState(sc, state);
2524 return (ACPI_SUCCESS(status) ? 0 : ENXIO);
2528 * Set a timeout to fire if userland doesn't ack the suspend request
2529 * in time. This way we still eventually go to sleep if we were
2530 * overheating or running low on battery, even if userland is hung.
2531 * We cancel this timeout once all userland acks are in or the
2532 * suspend request is aborted.
2534 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc);
2537 /* Now notify devd(8) also. */
2538 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state);
2542 /* This platform does not support acpi suspend/resume. */
2543 return (EOPNOTSUPP);
2548 * Acknowledge (or reject) a pending sleep state. The caller has
2549 * prepared for suspend and is now ready for it to proceed. If the
2550 * error argument is non-zero, it indicates suspend should be cancelled
2551 * and gives an errno value describing why. Once all votes are in,
2552 * we suspend the system.
2555 acpi_AckSleepState(struct apm_clone_data *clone, int error)
2557 #if defined(__amd64__) || defined(__i386__)
2558 struct acpi_softc *sc;
2561 /* If no pending sleep state, return an error. */
2563 sc = clone->acpi_sc;
2564 if (sc->acpi_next_sstate == 0) {
2569 /* Caller wants to abort suspend process. */
2571 sc->acpi_next_sstate = 0;
2572 callout_stop(&sc->susp_force_to);
2573 device_printf(sc->acpi_dev,
2574 "listener on %s cancelled the pending suspend\n",
2575 devtoname(clone->cdev));
2581 * Mark this device as acking the suspend request. Then, walk through
2582 * all devices, seeing if they agree yet. We only count devices that
2583 * are writable since read-only devices couldn't ack the request.
2586 clone->notify_status = APM_EV_ACKED;
2587 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2588 if ((clone->flags & ACPI_EVF_WRITE) != 0 &&
2589 clone->notify_status != APM_EV_ACKED) {
2595 /* If all devices have voted "yes", we will suspend now. */
2597 callout_stop(&sc->susp_force_to);
2601 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2606 /* This platform does not support acpi suspend/resume. */
2607 return (EOPNOTSUPP);
2612 acpi_sleep_enable(void *arg)
2614 struct acpi_softc *sc = (struct acpi_softc *)arg;
2616 /* Reschedule if the system is not fully up and running. */
2617 if (!AcpiGbl_SystemAwakeAndRunning) {
2618 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
2623 sc->acpi_sleep_disabled = FALSE;
2628 acpi_sleep_disable(struct acpi_softc *sc)
2632 /* Fail if the system is not fully up and running. */
2633 if (!AcpiGbl_SystemAwakeAndRunning)
2637 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK;
2638 sc->acpi_sleep_disabled = TRUE;
2644 enum acpi_sleep_state {
2647 ACPI_SS_DEV_SUSPEND,
2653 * Enter the desired system sleep state.
2655 * Currently we support S1-S5 but S4 is only S4BIOS
2658 acpi_EnterSleepState(struct acpi_softc *sc, int state)
2662 ACPI_EVENT_STATUS power_button_status;
2663 enum acpi_sleep_state slp_state;
2666 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2668 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX)
2669 return_ACPI_STATUS (AE_BAD_PARAMETER);
2670 if (!acpi_sleep_states[state]) {
2671 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n",
2673 return (AE_SUPPORT);
2676 /* Re-entry once we're suspending is not allowed. */
2677 status = acpi_sleep_disable(sc);
2678 if (ACPI_FAILURE(status)) {
2679 device_printf(sc->acpi_dev,
2680 "suspend request ignored (not ready yet)\n");
2684 if (state == ACPI_STATE_S5) {
2686 * Shut down cleanly and power off. This will call us back through the
2687 * shutdown handlers.
2689 shutdown_nice(RB_POWEROFF);
2690 return_ACPI_STATUS (AE_OK);
2693 EVENTHANDLER_INVOKE(power_suspend);
2696 thread_lock(curthread);
2697 sched_bind(curthread, 0);
2698 thread_unlock(curthread);
2702 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE
2703 * drivers need this.
2707 slp_state = ACPI_SS_NONE;
2709 sc->acpi_sstate = state;
2711 /* Enable any GPEs as appropriate and requested by the user. */
2712 acpi_wake_prep_walk(state);
2713 slp_state = ACPI_SS_GPE_SET;
2716 * Inform all devices that we are going to sleep. If at least one
2717 * device fails, DEVICE_SUSPEND() automatically resumes the tree.
2719 * XXX Note that a better two-pass approach with a 'veto' pass
2720 * followed by a "real thing" pass would be better, but the current
2721 * bus interface does not provide for this.
2723 if (DEVICE_SUSPEND(root_bus) != 0) {
2724 device_printf(sc->acpi_dev, "device_suspend failed\n");
2727 slp_state = ACPI_SS_DEV_SUSPEND;
2729 /* If testing device suspend only, back out of everything here. */
2730 if (acpi_susp_bounce)
2733 status = AcpiEnterSleepStatePrep(state);
2734 if (ACPI_FAILURE(status)) {
2735 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
2736 AcpiFormatException(status));
2739 slp_state = ACPI_SS_SLP_PREP;
2741 if (sc->acpi_sleep_delay > 0)
2742 DELAY(sc->acpi_sleep_delay * 1000000);
2744 intr = intr_disable();
2745 if (state != ACPI_STATE_S1) {
2746 sleep_result = acpi_sleep_machdep(sc, state);
2747 acpi_wakeup_machdep(sc, state, sleep_result, 0);
2750 * XXX According to ACPI specification SCI_EN bit should be restored
2751 * by ACPI platform (BIOS, firmware) to its pre-sleep state.
2752 * Unfortunately some BIOSes fail to do that and that leads to
2753 * unexpected and serious consequences during wake up like a system
2754 * getting stuck in SMI handlers.
2755 * This hack is picked up from Linux, which claims that it follows
2758 if (sleep_result == 1 && state != ACPI_STATE_S4)
2759 AcpiWriteBitRegister(ACPI_BITREG_SCI_ENABLE, ACPI_ENABLE_EVENT);
2761 AcpiLeaveSleepStatePrep(state);
2763 if (sleep_result == 1 && state == ACPI_STATE_S3) {
2765 * Prevent mis-interpretation of the wakeup by power button
2766 * as a request for power off.
2767 * Ideally we should post an appropriate wakeup event,
2768 * perhaps using acpi_event_power_button_wake or alike.
2770 * Clearing of power button status after wakeup is mandated
2771 * by ACPI specification in section "Fixed Power Button".
2773 * XXX As of ACPICA 20121114 AcpiGetEventStatus provides
2774 * status as 0/1 corressponding to inactive/active despite
2775 * its type being ACPI_EVENT_STATUS. In other words,
2776 * we should not test for ACPI_EVENT_FLAG_SET for time being.
2778 if (ACPI_SUCCESS(AcpiGetEventStatus(ACPI_EVENT_POWER_BUTTON,
2779 &power_button_status)) && power_button_status != 0) {
2780 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
2781 device_printf(sc->acpi_dev,
2782 "cleared fixed power button status\n");
2788 /* call acpi_wakeup_machdep() again with interrupt enabled */
2789 acpi_wakeup_machdep(sc, state, sleep_result, 1);
2791 if (sleep_result == -1)
2794 /* Re-enable ACPI hardware on wakeup from sleep state 4. */
2795 if (state == ACPI_STATE_S4)
2798 status = AcpiEnterSleepState(state);
2799 AcpiLeaveSleepStatePrep(state);
2801 if (ACPI_FAILURE(status)) {
2802 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n",
2803 AcpiFormatException(status));
2807 slp_state = ACPI_SS_SLEPT;
2810 * Back out state according to how far along we got in the suspend
2811 * process. This handles both the error and success cases.
2814 if (slp_state >= ACPI_SS_GPE_SET) {
2815 acpi_wake_prep_walk(state);
2816 sc->acpi_sstate = ACPI_STATE_S0;
2818 if (slp_state >= ACPI_SS_DEV_SUSPEND)
2819 DEVICE_RESUME(root_bus);
2820 if (slp_state >= ACPI_SS_SLP_PREP)
2821 AcpiLeaveSleepState(state);
2822 if (slp_state >= ACPI_SS_SLEPT) {
2823 acpi_resync_clock(sc);
2824 acpi_enable_fixed_events(sc);
2826 sc->acpi_next_sstate = 0;
2831 thread_lock(curthread);
2832 sched_unbind(curthread);
2833 thread_unlock(curthread);
2836 EVENTHANDLER_INVOKE(power_resume);
2838 /* Allow another sleep request after a while. */
2839 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
2841 /* Run /etc/rc.resume after we are back. */
2842 if (devctl_process_running())
2843 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state);
2845 return_ACPI_STATUS (status);
2849 acpi_resync_clock(struct acpi_softc *sc)
2852 if (!acpi_reset_clock)
2856 * Warm up timecounter again and reset system clock.
2858 (void)timecounter->tc_get_timecount(timecounter);
2859 (void)timecounter->tc_get_timecount(timecounter);
2860 inittodr(time_second + sc->acpi_sleep_delay);
2864 /* Enable or disable the device's wake GPE. */
2866 acpi_wake_set_enable(device_t dev, int enable)
2868 struct acpi_prw_data prw;
2872 /* Make sure the device supports waking the system and get the GPE. */
2873 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0)
2876 flags = acpi_get_flags(dev);
2878 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit,
2880 if (ACPI_FAILURE(status)) {
2881 device_printf(dev, "enable wake failed\n");
2884 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED);
2886 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit,
2888 if (ACPI_FAILURE(status)) {
2889 device_printf(dev, "disable wake failed\n");
2892 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED);
2899 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate)
2901 struct acpi_prw_data prw;
2904 /* Check that this is a wake-capable device and get its GPE. */
2905 if (acpi_parse_prw(handle, &prw) != 0)
2907 dev = acpi_get_device(handle);
2910 * The destination sleep state must be less than (i.e., higher power)
2911 * or equal to the value specified by _PRW. If this GPE cannot be
2912 * enabled for the next sleep state, then disable it. If it can and
2913 * the user requested it be enabled, turn on any required power resources
2916 if (sstate > prw.lowest_wake) {
2917 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE);
2919 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n",
2920 acpi_name(handle), sstate);
2921 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) {
2922 acpi_pwr_wake_enable(handle, 1);
2923 acpi_SetInteger(handle, "_PSW", 1);
2925 device_printf(dev, "wake_prep enabled for %s (S%d)\n",
2926 acpi_name(handle), sstate);
2933 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate)
2935 struct acpi_prw_data prw;
2939 * Check that this is a wake-capable device and get its GPE. Return
2940 * now if the user didn't enable this device for wake.
2942 if (acpi_parse_prw(handle, &prw) != 0)
2944 dev = acpi_get_device(handle);
2945 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0)
2949 * If this GPE couldn't be enabled for the previous sleep state, it was
2950 * disabled before going to sleep so re-enable it. If it was enabled,
2951 * clear _PSW and turn off any power resources it used.
2953 if (sstate > prw.lowest_wake) {
2954 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE);
2956 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle));
2958 acpi_SetInteger(handle, "_PSW", 0);
2959 acpi_pwr_wake_enable(handle, 0);
2961 device_printf(dev, "run_prep cleaned up for %s\n",
2969 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
2973 /* If suspending, run the sleep prep function, otherwise wake. */
2974 sstate = *(int *)context;
2975 if (AcpiGbl_SystemAwakeAndRunning)
2976 acpi_wake_sleep_prep(handle, sstate);
2978 acpi_wake_run_prep(handle, sstate);
2982 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */
2984 acpi_wake_prep_walk(int sstate)
2986 ACPI_HANDLE sb_handle;
2988 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle)))
2989 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100,
2990 acpi_wake_prep, NULL, &sstate, NULL);
2994 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */
2996 acpi_wake_sysctl_walk(device_t dev)
2998 int error, i, numdevs;
3003 error = device_get_children(dev, &devlist, &numdevs);
3004 if (error != 0 || numdevs == 0) {
3006 free(devlist, M_TEMP);
3009 for (i = 0; i < numdevs; i++) {
3011 acpi_wake_sysctl_walk(child);
3012 if (!device_is_attached(child))
3014 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL);
3015 if (ACPI_SUCCESS(status)) {
3016 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child),
3017 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO,
3018 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0,
3019 acpi_wake_set_sysctl, "I", "Device set to wake the system");
3022 free(devlist, M_TEMP);
3027 /* Enable or disable wake from userland. */
3029 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS)
3034 dev = (device_t)arg1;
3035 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0;
3037 error = sysctl_handle_int(oidp, &enable, 0, req);
3038 if (error != 0 || req->newptr == NULL)
3040 if (enable != 0 && enable != 1)
3043 return (acpi_wake_set_enable(dev, enable));
3046 /* Parse a device's _PRW into a structure. */
3048 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw)
3051 ACPI_BUFFER prw_buffer;
3052 ACPI_OBJECT *res, *res2;
3053 int error, i, power_count;
3055 if (h == NULL || prw == NULL)
3059 * The _PRW object (7.2.9) is only required for devices that have the
3060 * ability to wake the system from a sleeping state.
3063 prw_buffer.Pointer = NULL;
3064 prw_buffer.Length = ACPI_ALLOCATE_BUFFER;
3065 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer);
3066 if (ACPI_FAILURE(status))
3068 res = (ACPI_OBJECT *)prw_buffer.Pointer;
3071 if (!ACPI_PKG_VALID(res, 2))
3075 * Element 1 of the _PRW object:
3076 * The lowest power system sleeping state that can be entered while still
3077 * providing wake functionality. The sleeping state being entered must
3078 * be less than (i.e., higher power) or equal to this value.
3080 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0)
3084 * Element 0 of the _PRW object:
3086 switch (res->Package.Elements[0].Type) {
3087 case ACPI_TYPE_INTEGER:
3089 * If the data type of this package element is numeric, then this
3090 * _PRW package element is the bit index in the GPEx_EN, in the
3091 * GPE blocks described in the FADT, of the enable bit that is
3092 * enabled for the wake event.
3094 prw->gpe_handle = NULL;
3095 prw->gpe_bit = res->Package.Elements[0].Integer.Value;
3098 case ACPI_TYPE_PACKAGE:
3100 * If the data type of this package element is a package, then this
3101 * _PRW package element is itself a package containing two
3102 * elements. The first is an object reference to the GPE Block
3103 * device that contains the GPE that will be triggered by the wake
3104 * event. The second element is numeric and it contains the bit
3105 * index in the GPEx_EN, in the GPE Block referenced by the
3106 * first element in the package, of the enable bit that is enabled for
3109 * For example, if this field is a package then it is of the form:
3110 * Package() {\_SB.PCI0.ISA.GPE, 2}
3112 res2 = &res->Package.Elements[0];
3113 if (!ACPI_PKG_VALID(res2, 2))
3115 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]);
3116 if (prw->gpe_handle == NULL)
3118 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0)
3126 /* Elements 2 to N of the _PRW object are power resources. */
3127 power_count = res->Package.Count - 2;
3128 if (power_count > ACPI_PRW_MAX_POWERRES) {
3129 printf("ACPI device %s has too many power resources\n", acpi_name(h));
3132 prw->power_res_count = power_count;
3133 for (i = 0; i < power_count; i++)
3134 prw->power_res[i] = res->Package.Elements[i];
3137 if (prw_buffer.Pointer != NULL)
3138 AcpiOsFree(prw_buffer.Pointer);
3143 * ACPI Event Handlers
3146 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
3149 acpi_system_eventhandler_sleep(void *arg, int state)
3151 struct acpi_softc *sc = (struct acpi_softc *)arg;
3154 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
3156 /* Check if button action is disabled or unknown. */
3157 if (state == ACPI_STATE_UNKNOWN)
3160 /* Request that the system prepare to enter the given suspend state. */
3161 ret = acpi_ReqSleepState(sc, state);
3163 device_printf(sc->acpi_dev,
3164 "request to enter state S%d failed (err %d)\n", state, ret);
3170 acpi_system_eventhandler_wakeup(void *arg, int state)
3173 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
3175 /* Currently, nothing to do for wakeup. */
3181 * ACPICA Event Handlers (FixedEvent, also called from button notify handler)
3184 acpi_invoke_sleep_eventhandler(void *context)
3187 EVENTHANDLER_INVOKE(acpi_sleep_event, *(int *)context);
3191 acpi_invoke_wake_eventhandler(void *context)
3194 EVENTHANDLER_INVOKE(acpi_wakeup_event, *(int *)context);
3198 acpi_event_power_button_sleep(void *context)
3200 struct acpi_softc *sc = (struct acpi_softc *)context;
3202 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3204 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3205 acpi_invoke_sleep_eventhandler, &sc->acpi_power_button_sx)))
3206 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3207 return_VALUE (ACPI_INTERRUPT_HANDLED);
3211 acpi_event_power_button_wake(void *context)
3213 struct acpi_softc *sc = (struct acpi_softc *)context;
3215 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3217 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3218 acpi_invoke_wake_eventhandler, &sc->acpi_power_button_sx)))
3219 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3220 return_VALUE (ACPI_INTERRUPT_HANDLED);
3224 acpi_event_sleep_button_sleep(void *context)
3226 struct acpi_softc *sc = (struct acpi_softc *)context;
3228 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3230 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3231 acpi_invoke_sleep_eventhandler, &sc->acpi_sleep_button_sx)))
3232 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3233 return_VALUE (ACPI_INTERRUPT_HANDLED);
3237 acpi_event_sleep_button_wake(void *context)
3239 struct acpi_softc *sc = (struct acpi_softc *)context;
3241 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3243 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3244 acpi_invoke_wake_eventhandler, &sc->acpi_sleep_button_sx)))
3245 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3246 return_VALUE (ACPI_INTERRUPT_HANDLED);
3250 * XXX This static buffer is suboptimal. There is no locking so only
3251 * use this for single-threaded callers.
3254 acpi_name(ACPI_HANDLE handle)
3257 static char data[256];
3259 buf.Length = sizeof(data);
3262 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf)))
3264 return ("(unknown)");
3268 * Debugging/bug-avoidance. Avoid trying to fetch info on various
3269 * parts of the namespace.
3272 acpi_avoid(ACPI_HANDLE handle)
3274 char *cp, *env, *np;
3277 np = acpi_name(handle);
3280 if ((env = getenv("debug.acpi.avoid")) == NULL)
3283 /* Scan the avoid list checking for a match */
3286 while (*cp != 0 && isspace(*cp))
3291 while (cp[len] != 0 && !isspace(cp[len]))
3293 if (!strncmp(cp, np, len)) {
3305 * Debugging/bug-avoidance. Disable ACPI subsystem components.
3308 acpi_disabled(char *subsys)
3313 if ((env = getenv("debug.acpi.disabled")) == NULL)
3315 if (strcmp(env, "all") == 0) {
3320 /* Scan the disable list, checking for a match. */
3323 while (*cp != '\0' && isspace(*cp))
3328 while (cp[len] != '\0' && !isspace(cp[len]))
3330 if (strncmp(cp, subsys, len) == 0) {
3342 * Control interface.
3344 * We multiplex ioctls for all participating ACPI devices here. Individual
3345 * drivers wanting to be accessible via /dev/acpi should use the
3346 * register/deregister interface to make their handlers visible.
3348 struct acpi_ioctl_hook
3350 TAILQ_ENTRY(acpi_ioctl_hook) link;
3356 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks;
3357 static int acpi_ioctl_hooks_initted;
3360 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg)
3362 struct acpi_ioctl_hook *hp;
3364 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL)
3371 if (acpi_ioctl_hooks_initted == 0) {
3372 TAILQ_INIT(&acpi_ioctl_hooks);
3373 acpi_ioctl_hooks_initted = 1;
3375 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link);
3382 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn)
3384 struct acpi_ioctl_hook *hp;
3387 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link)
3388 if (hp->cmd == cmd && hp->fn == fn)
3392 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link);
3393 free(hp, M_ACPIDEV);
3399 acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td)
3405 acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td)
3411 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
3413 struct acpi_softc *sc;
3414 struct acpi_ioctl_hook *hp;
3422 * Scan the list of registered ioctls, looking for handlers.
3425 if (acpi_ioctl_hooks_initted)
3426 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) {
3432 return (hp->fn(cmd, addr, hp->arg));
3435 * Core ioctls are not permitted for non-writable user.
3436 * Currently, other ioctls just fetch information.
3437 * Not changing system behavior.
3439 if ((flag & FWRITE) == 0)
3442 /* Core system ioctls. */
3444 case ACPIIO_REQSLPSTATE:
3445 state = *(int *)addr;
3446 if (state != ACPI_STATE_S5)
3447 return (acpi_ReqSleepState(sc, state));
3448 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n");
3451 case ACPIIO_ACKSLPSTATE:
3452 error = *(int *)addr;
3453 error = acpi_AckSleepState(sc->acpi_clone, error);
3455 case ACPIIO_SETSLPSTATE: /* DEPRECATED */
3456 state = *(int *)addr;
3457 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX)
3459 if (!acpi_sleep_states[state])
3460 return (EOPNOTSUPP);
3461 if (ACPI_FAILURE(acpi_SetSleepState(sc, state)))
3473 acpi_sname2sstate(const char *sname)
3477 if (toupper(sname[0]) == 'S') {
3478 sstate = sname[1] - '0';
3479 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 &&
3482 } else if (strcasecmp(sname, "NONE") == 0)
3483 return (ACPI_STATE_UNKNOWN);
3488 acpi_sstate2sname(int sstate)
3490 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" };
3492 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5)
3493 return (snames[sstate]);
3494 else if (sstate == ACPI_STATE_UNKNOWN)
3500 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3506 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND);
3507 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++)
3508 if (acpi_sleep_states[state])
3509 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state));
3512 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req);
3518 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3520 char sleep_state[10];
3521 int error, new_state, old_state;
3523 old_state = *(int *)oidp->oid_arg1;
3524 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state));
3525 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req);
3526 if (error == 0 && req->newptr != NULL) {
3527 new_state = acpi_sname2sstate(sleep_state);
3528 if (new_state < ACPI_STATE_S1)
3530 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state])
3531 return (EOPNOTSUPP);
3532 if (new_state != old_state)
3533 *(int *)oidp->oid_arg1 = new_state;
3538 /* Inform devctl(4) when we receive a Notify. */
3540 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify)
3542 char notify_buf[16];
3543 ACPI_BUFFER handle_buf;
3546 if (subsystem == NULL)
3549 handle_buf.Pointer = NULL;
3550 handle_buf.Length = ACPI_ALLOCATE_BUFFER;
3551 status = AcpiNsHandleToPathname(h, &handle_buf);
3552 if (ACPI_FAILURE(status))
3554 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify);
3555 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf);
3556 AcpiOsFree(handle_buf.Pointer);
3561 * Support for parsing debug options from the kernel environment.
3563 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers
3564 * by specifying the names of the bits in the debug.acpi.layer and
3565 * debug.acpi.level environment variables. Bits may be unset by
3566 * prefixing the bit name with !.
3574 static struct debugtag dbg_layer[] = {
3575 {"ACPI_UTILITIES", ACPI_UTILITIES},
3576 {"ACPI_HARDWARE", ACPI_HARDWARE},
3577 {"ACPI_EVENTS", ACPI_EVENTS},
3578 {"ACPI_TABLES", ACPI_TABLES},
3579 {"ACPI_NAMESPACE", ACPI_NAMESPACE},
3580 {"ACPI_PARSER", ACPI_PARSER},
3581 {"ACPI_DISPATCHER", ACPI_DISPATCHER},
3582 {"ACPI_EXECUTER", ACPI_EXECUTER},
3583 {"ACPI_RESOURCES", ACPI_RESOURCES},
3584 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER},
3585 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
3586 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER},
3587 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
3589 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
3590 {"ACPI_BATTERY", ACPI_BATTERY},
3591 {"ACPI_BUS", ACPI_BUS},
3592 {"ACPI_BUTTON", ACPI_BUTTON},
3593 {"ACPI_EC", ACPI_EC},
3594 {"ACPI_FAN", ACPI_FAN},
3595 {"ACPI_POWERRES", ACPI_POWERRES},
3596 {"ACPI_PROCESSOR", ACPI_PROCESSOR},
3597 {"ACPI_THERMAL", ACPI_THERMAL},
3598 {"ACPI_TIMER", ACPI_TIMER},
3599 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS},
3603 static struct debugtag dbg_level[] = {
3604 {"ACPI_LV_INIT", ACPI_LV_INIT},
3605 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
3606 {"ACPI_LV_INFO", ACPI_LV_INFO},
3607 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR},
3608 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS},
3610 /* Trace verbosity level 1 [Standard Trace Level] */
3611 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES},
3612 {"ACPI_LV_PARSE", ACPI_LV_PARSE},
3613 {"ACPI_LV_LOAD", ACPI_LV_LOAD},
3614 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH},
3615 {"ACPI_LV_EXEC", ACPI_LV_EXEC},
3616 {"ACPI_LV_NAMES", ACPI_LV_NAMES},
3617 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION},
3618 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD},
3619 {"ACPI_LV_TABLES", ACPI_LV_TABLES},
3620 {"ACPI_LV_VALUES", ACPI_LV_VALUES},
3621 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS},
3622 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES},
3623 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS},
3624 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE},
3625 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1},
3627 /* Trace verbosity level 2 [Function tracing and memory allocation] */
3628 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS},
3629 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS},
3630 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS},
3631 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2},
3632 {"ACPI_LV_ALL", ACPI_LV_ALL},
3634 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */
3635 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX},
3636 {"ACPI_LV_THREADS", ACPI_LV_THREADS},
3637 {"ACPI_LV_IO", ACPI_LV_IO},
3638 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS},
3639 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3},
3641 /* Exceptionally verbose output -- also used in the global "DebugLevel" */
3642 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE},
3643 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO},
3644 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES},
3645 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS},
3646 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE},
3651 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag)
3663 while (*ep && !isspace(*ep))
3674 for (i = 0; tag[i].name != NULL; i++) {
3675 if (!strncmp(cp, tag[i].name, l)) {
3677 *flag |= tag[i].value;
3679 *flag &= ~tag[i].value;
3687 acpi_set_debugging(void *junk)
3689 char *layer, *level;
3696 layer = getenv("debug.acpi.layer");
3697 level = getenv("debug.acpi.level");
3698 if (layer == NULL && level == NULL)
3701 printf("ACPI set debug");
3702 if (layer != NULL) {
3703 if (strcmp("NONE", layer) != 0)
3704 printf(" layer '%s'", layer);
3705 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer);
3708 if (level != NULL) {
3709 if (strcmp("NONE", level) != 0)
3710 printf(" level '%s'", level);
3711 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel);
3717 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging,
3721 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS)
3724 struct debugtag *tag;
3727 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL)
3729 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) {
3730 tag = &dbg_layer[0];
3731 dbg = &AcpiDbgLayer;
3733 tag = &dbg_level[0];
3734 dbg = &AcpiDbgLevel;
3737 /* Get old values if this is a get request. */
3738 ACPI_SERIAL_BEGIN(acpi);
3740 sbuf_cpy(&sb, "NONE");
3741 } else if (req->newptr == NULL) {
3742 for (; tag->name != NULL; tag++) {
3743 if ((*dbg & tag->value) == tag->value)
3744 sbuf_printf(&sb, "%s ", tag->name);
3750 /* Copy out the old values to the user. */
3751 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb));
3754 /* If the user is setting a string, parse it. */
3755 if (error == 0 && req->newptr != NULL) {
3757 setenv((char *)oidp->oid_arg1, (char *)req->newptr);
3758 acpi_set_debugging(NULL);
3760 ACPI_SERIAL_END(acpi);
3765 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING,
3766 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", "");
3767 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING,
3768 "debug.acpi.level", 0, acpi_debug_sysctl, "A", "");
3769 #endif /* ACPI_DEBUG */
3772 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS)
3777 old = acpi_debug_objects;
3778 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req);
3779 if (error != 0 || req->newptr == NULL)
3781 if (old == acpi_debug_objects || (old && acpi_debug_objects))
3784 ACPI_SERIAL_BEGIN(acpi);
3785 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE;
3786 ACPI_SERIAL_END(acpi);
3792 acpi_parse_interfaces(char *str, struct acpi_interface *iface)
3799 while (isspace(*p) || *p == ',')
3804 p = strdup(p, M_TEMP);
3805 for (i = 0; i < len; i++)
3810 if (isspace(p[i]) || p[i] == '\0')
3813 i += strlen(p + i) + 1;
3820 iface->data = malloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK);
3824 if (isspace(p[i]) || p[i] == '\0')
3827 iface->data[j] = p + i;
3828 i += strlen(p + i) + 1;
3836 acpi_free_interfaces(struct acpi_interface *iface)
3839 free(iface->data[0], M_TEMP);
3840 free(iface->data, M_TEMP);
3844 acpi_reset_interfaces(device_t dev)
3846 struct acpi_interface list;
3850 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) {
3851 for (i = 0; i < list.num; i++) {
3852 status = AcpiInstallInterface(list.data[i]);
3853 if (ACPI_FAILURE(status))
3855 "failed to install _OSI(\"%s\"): %s\n",
3856 list.data[i], AcpiFormatException(status));
3857 else if (bootverbose)
3858 device_printf(dev, "installed _OSI(\"%s\")\n",
3861 acpi_free_interfaces(&list);
3863 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) {
3864 for (i = 0; i < list.num; i++) {
3865 status = AcpiRemoveInterface(list.data[i]);
3866 if (ACPI_FAILURE(status))
3868 "failed to remove _OSI(\"%s\"): %s\n",
3869 list.data[i], AcpiFormatException(status));
3870 else if (bootverbose)
3871 device_printf(dev, "removed _OSI(\"%s\")\n",
3874 acpi_free_interfaces(&list);
3879 acpi_pm_func(u_long cmd, void *arg, ...)
3881 int state, acpi_state;
3883 struct acpi_softc *sc;
3888 case POWER_CMD_SUSPEND:
3889 sc = (struct acpi_softc *)arg;
3896 state = va_arg(ap, int);
3900 case POWER_SLEEP_STATE_STANDBY:
3901 acpi_state = sc->acpi_standby_sx;
3903 case POWER_SLEEP_STATE_SUSPEND:
3904 acpi_state = sc->acpi_suspend_sx;
3906 case POWER_SLEEP_STATE_HIBERNATE:
3907 acpi_state = ACPI_STATE_S4;
3914 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state)))
3927 acpi_pm_register(void *arg)
3929 if (!cold || resource_disabled("acpi", 0))
3932 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL);
3935 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0);