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5d56add2ba
thread context. While it doesn't matter too much at the moment, in the future we could be back in the same boat if/when more restrictions are placed (or enforced) in a SWI. Suggested by: njl, bde, jhb, scottl
123 lines
3.1 KiB
C
123 lines
3.1 KiB
C
/*-
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* Copyright (c) 2001 Mitsuru IWASAKI
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/power.h>
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#include <sys/taskqueue.h>
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static u_int power_pm_type = POWER_PM_TYPE_NONE;
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static power_pm_fn_t power_pm_fn = NULL;
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static void *power_pm_arg = NULL;
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static struct task power_pm_task;
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static void
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power_pm_deferred_fn(void *arg, int pending)
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{
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int state = (intptr_t)arg;
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power_pm_fn(POWER_CMD_SUSPEND, power_pm_arg, state);
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}
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int
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power_pm_register(u_int pm_type, power_pm_fn_t pm_fn, void *pm_arg)
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{
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int error;
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if (power_pm_type == POWER_PM_TYPE_NONE ||
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power_pm_type == pm_type) {
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power_pm_type = pm_type;
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power_pm_fn = pm_fn;
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power_pm_arg = pm_arg;
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error = 0;
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TASK_INIT(&power_pm_task, 0, power_pm_deferred_fn, NULL);
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} else {
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error = ENXIO;
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}
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return (error);
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}
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u_int
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power_pm_get_type(void)
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{
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return (power_pm_type);
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}
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void
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power_pm_suspend(int state)
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{
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if (power_pm_fn == NULL)
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return;
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if (state != POWER_SLEEP_STATE_STANDBY &&
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state != POWER_SLEEP_STATE_SUSPEND &&
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state != POWER_SLEEP_STATE_HIBERNATE)
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return;
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power_pm_task.ta_context = (void *)(intptr_t)state;
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taskqueue_enqueue(taskqueue_thread, &power_pm_task);
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}
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/*
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* Power profile.
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*/
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static int power_profile_state = POWER_PROFILE_PERFORMANCE;
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int
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power_profile_get_state(void)
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{
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return (power_profile_state);
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}
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void
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power_profile_set_state(int state)
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{
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int changed;
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if (state != power_profile_state) {
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power_profile_state = state;
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changed = 1;
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if (bootverbose) {
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printf("system power profile changed to '%s'\n",
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(state == POWER_PROFILE_PERFORMANCE) ?
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"performance" : "economy");
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}
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} else {
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changed = 0;
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}
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if (changed)
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EVENTHANDLER_INVOKE(power_profile_change, 0);
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}
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