Add generalized power profile code.

This makes other power-management system (APM for now) to be able to
generate power profile change events (ie. AC-line status changes), and
other kernel components, not only the ACPI components, can be notified
the events.

 - move subroutines in acpi_powerprofile.c (removed) to kern/subr_power.c
 - call power_profile_set_state() also from APM driver when AC-line
   status changes
 - add call-back function for Crusoe LongRun controlling on power
   profile changes for a example

13 files changed, 267 insertions, 95 deletions

diff --git a/sys/amd64/amd64/identcpu.c b/sys/amd64/amd64/identcpu.c
index 156d2c0..6aa0967 100644
--- a/sys/amd64/amd64/identcpu.c
+++ b/sys/amd64/amd64/identcpu.c
@@ -48,6 +48,7 @@
 #include <sys/systm.h>
 #include <sys/kernel.h>
 #include <sys/sysctl.h>
+#include <sys/power.h>
 
 #include <machine/asmacros.h>
 #include <machine/clock.h>
@@ -1135,9 +1136,40 @@ static u_int			 crusoe_longrun;
 static u_int			 crusoe_frequency;
 static u_int	 		 crusoe_voltage;
 static u_int	 		 crusoe_percentage;
+static u_int	 		 crusoe_performance_longrun = LONGRUN_MODE_PERFORMANCE;
+static u_int	 		 crusoe_economy_longrun = LONGRUN_MODE_ECONOMY;
 static struct sysctl_ctx_list	 crusoe_sysctl_ctx;
 static struct sysctl_oid	*crusoe_sysctl_tree;
 
+static void
+tmx86_longrun_power_profile(void *arg)
+{
+	int	state;
+	u_int	new;
+
+	state = power_profile_get_state();
+	if (state != POWER_PROFILE_PERFORMANCE &&
+	    state != POWER_PROFILE_ECONOMY) {
+		return;
+	}
+
+	switch (state) {
+	case POWER_PROFILE_PERFORMANCE:
+		new =crusoe_performance_longrun;
+		break;
+	case POWER_PROFILE_ECONOMY:
+		new = crusoe_economy_longrun;
+		break;
+	default:
+		new = tmx86_get_longrun_mode();
+		break;
+	}
+
+	if (tmx86_get_longrun_mode() != new) {
+		tmx86_set_longrun_mode(new);
+	}
+}
+
 static int
 tmx86_longrun_sysctl(SYSCTL_HANDLER_ARGS)
 {
@@ -1175,6 +1207,34 @@ tmx86_status_sysctl(SYSCTL_HANDLER_ARGS)
 	return (error);
 }
 
+static int
+tmx86_longrun_profile_sysctl(SYSCTL_HANDLER_ARGS)
+{
+	u_int32_t *argp;
+	u_int32_t arg;
+	int	error;
+
+	argp = (u_int32_t *)oidp->oid_arg1;
+	arg = *argp;
+	error = sysctl_handle_int(oidp, &arg, 0, req);
+
+	/* error or no new value */
+	if ((error != 0) || (req->newptr == NULL))
+		return (error);
+
+	/* range check */
+	if (arg >= LONGRUN_MODE_UNKNOWN)
+		return (EINVAL);
+
+	/* set new value and possibly switch */
+	*argp = arg;
+
+	tmx86_longrun_power_profile(NULL);
+
+	return (0);
+
+}
+
 static void
 setup_tmx86_longrun(void)
 {
@@ -1205,6 +1265,16 @@ setup_tmx86_longrun(void)
 		OID_AUTO, "percentage", CTLTYPE_INT | CTLFLAG_RD,
 		&crusoe_percentage, 0, tmx86_status_sysctl, "I",
 		"Processing performance (%)");
+	SYSCTL_ADD_PROC(&crusoe_sysctl_ctx, SYSCTL_CHILDREN(crusoe_sysctl_tree),
+		OID_AUTO, "performance_longrun", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_RW,
+		&crusoe_performance_longrun, 0, tmx86_longrun_profile_sysctl, "I", "");
+	SYSCTL_ADD_PROC(&crusoe_sysctl_ctx, SYSCTL_CHILDREN(crusoe_sysctl_tree),
+		OID_AUTO, "economy_longrun", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_RW,
+		&crusoe_economy_longrun, 0, tmx86_longrun_profile_sysctl, "I", "");
+
+	/* register performance profile change handler */
+	EVENTHANDLER_REGISTER(power_profile_change, tmx86_longrun_power_profile, NULL, 0);
+
 }
 
 static void
diff --git a/sys/conf/files b/sys/conf/files
index 554821b..03ebaca 100644
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -207,7 +207,6 @@ dev/acpica/acpi_ec.c		optional acpica
 dev/acpica/acpi_lid.c		optional acpica
 dev/acpica/acpi_pcib.c		optional acpica pci
 dev/acpica/acpi_powerres.c	optional acpica nowerror
-dev/acpica/acpi_powerprofile.c	optional acpica
 dev/acpica/acpi_resource.c	optional acpica
 dev/acpica/acpi_thermal.c	optional acpica
 dev/acpica/acpi_timer.c		optional acpica
diff --git a/sys/dev/acpica/acpi_acad.c b/sys/dev/acpica/acpi_acad.c
index 10fe39a..2c9daf9 100644
--- a/sys/dev/acpica/acpi_acad.c
+++ b/sys/dev/acpica/acpi_acad.c
@@ -37,6 +37,7 @@
 #include <sys/ioccom.h>
 #include <sys/malloc.h>
 #include <sys/conf.h>
+#include <sys/power.h>
 
 #include  "acpi.h"
 #include <dev/acpica/acpivar.h>
@@ -79,7 +80,7 @@ acpi_acad_get_status(void *context)
 	if (sc->status != newstatus) {
 		sc->status = newstatus;
 		/* set system power profile based on AC adapter status */
-		powerprofile_set_state(sc->status ? POWERPROFILE_PERFORMANCE : POWERPROFILE_ECONOMY);
+		power_profile_set_state(sc->status ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY);
 		ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
 		    "%s Line\n",(sc->status) ? "On" : "Off");
 	}
diff --git a/sys/dev/acpica/acpi_cpu.c b/sys/dev/acpica/acpi_cpu.c
index ab55023..7014705 100644
--- a/sys/dev/acpica/acpi_cpu.c
+++ b/sys/dev/acpica/acpi_cpu.c
@@ -30,6 +30,7 @@
 #include <sys/param.h>
 #include <sys/kernel.h>
 #include <sys/bus.h>
+#include <sys/power.h>
 
 #include <machine/bus_pio.h>
 #include <machine/bus.h>
@@ -99,7 +100,7 @@ static int	acpi_cpu_probe(device_t dev);
 static int	acpi_cpu_attach(device_t dev);
 static void	acpi_cpu_init_throttling(void *arg);
 static void	acpi_cpu_set_speed(u_int32_t speed);
-static void	acpi_cpu_powerprofile(void *arg);
+static void	acpi_cpu_power_profile(void *arg);
 static int	acpi_cpu_speed_sysctl(SYSCTL_HANDLER_ARGS);
 
 static device_method_t acpi_cpu_methods[] = {
@@ -280,7 +281,7 @@ acpi_cpu_init_throttling(void *arg)
 	cpu_economy_state = cpu_temp_speed;
 
     /* register performance profile change handler */
-    EVENTHANDLER_REGISTER(powerprofile_change, acpi_cpu_powerprofile, NULL, 0);
+    EVENTHANDLER_REGISTER(power_profile_change, acpi_cpu_power_profile, NULL, 0);
 
     /* if ACPI 2.0+, signal platform that we are taking over throttling */
     if (cpu_pstate_cnt != 0) {
@@ -291,7 +292,7 @@ acpi_cpu_init_throttling(void *arg)
     ACPI_UNLOCK;
 
     /* set initial speed */
-    acpi_cpu_powerprofile(NULL);
+    acpi_cpu_power_profile(NULL);
     
     printf("acpi_cpu: CPU throttling enabled, %d steps from 100%% to %d.%d%%\n", 
 	   CPU_MAX_SPEED, CPU_SPEED_PRINTABLE(1));
@@ -347,13 +348,31 @@ acpi_cpu_set_speed(u_int32_t speed)
  * Uses the ACPI lock to avoid reentrancy.
  */
 static void
-acpi_cpu_powerprofile(void *arg)
+acpi_cpu_power_profile(void *arg)
 {
+    int		state;
     u_int32_t	new;
 
+    state = power_profile_get_state();
+    if (state != POWER_PROFILE_PERFORMANCE &&
+        state != POWER_PROFILE_ECONOMY) {
+	return;
+    }
+
     ACPI_LOCK;
     
-    new = (powerprofile_get_state() == POWERPROFILE_PERFORMANCE) ? cpu_performance_state : cpu_economy_state;
+    switch (state) {
+    case POWER_PROFILE_PERFORMANCE:
+	new = cpu_performance_state;
+	break;
+    case POWER_PROFILE_ECONOMY:
+	new = cpu_economy_state;
+	break;
+    default:
+	new = cpu_current_state;
+	break;
+    }
+
     if (cpu_current_state != new)
 	acpi_cpu_set_speed(new);
 
@@ -387,7 +406,7 @@ acpi_cpu_speed_sysctl(SYSCTL_HANDLER_ARGS)
 
     /* set new value and possibly switch */
     *argp = arg;
-    acpi_cpu_powerprofile(NULL);
+    acpi_cpu_power_profile(NULL);
 
     return(0);
 }
diff --git a/sys/dev/acpica/acpi_powerprofile.c b/sys/dev/acpica/acpi_powerprofile.c
deleted file mode 100644
index d5d952c..0000000
--- a/sys/dev/acpica/acpi_powerprofile.c
+++ /dev/null
@@ -1,65 +0,0 @@
-/*-
- * Copyright (c) 2001 Michael Smith
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	$FreeBSD$
- */
-
-#include "opt_acpi.h"	/* XXX trim includes */
-#include <sys/param.h>
-#include <sys/lock.h>
-#include <sys/mutex.h>
-#include <sys/bus.h>
-
-#include "acpi.h"
-
-#include <dev/acpica/acpivar.h>
-
-static int powerprofile_state = POWERPROFILE_PERFORMANCE;
-
-int
-powerprofile_get_state(void)
-{
-    return(powerprofile_state);
-}
-
-void
-powerprofile_set_state(int state) 
-{
-    int		changed;
-    
-    ACPI_LOCK;
-    if (state != powerprofile_state) {
-	powerprofile_state = state;
-	changed = 1;
-	printf("system power profile changed to '%s'\n",
-	       (state == POWERPROFILE_PERFORMANCE) ? "performance" : "economy");
-    } else {
-	changed = 0;
-    }
-    ACPI_UNLOCK;
-    if (changed)
-	EVENTHANDLER_INVOKE(powerprofile_change);
-}
-
diff --git a/sys/dev/acpica/acpi_thermal.c b/sys/dev/acpica/acpi_thermal.c
index 92902af..15acc1d 100644
--- a/sys/dev/acpica/acpi_thermal.c
+++ b/sys/dev/acpica/acpi_thermal.c
@@ -38,6 +38,7 @@
 #include <sys/reboot.h>
 #include <sys/sysctl.h>
 #include <sys/unistd.h>
+#include <sys/power.h>
 
 #include "acpi.h"
 
@@ -87,7 +88,7 @@ struct acpi_tz_softc {
 #define TZ_THFLAG_CRT		(1<<3)    
     int				tz_flags;
 #define TZ_FLAG_NO_SCP		(1<<0)			/* no _SCP method */
-#define TZ_FLAG_GETPROFILE	(1<<1)			/* fetch powerprofile in timeout */
+#define TZ_FLAG_GETPROFILE	(1<<1)			/* fetch power_profile in timeout */
     struct timespec		tz_cooling_started;	/* current cooling starting time */
 
     struct sysctl_ctx_list	tz_sysctl_ctx;		/* sysctl tree */
@@ -109,7 +110,7 @@ static void	acpi_tz_sanity(struct acpi_tz_softc *sc, int *val, char *what);
 static int	acpi_tz_active_sysctl(SYSCTL_HANDLER_ARGS);
 static void	acpi_tz_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context);
 static void	acpi_tz_timeout(struct acpi_tz_softc *sc);
-static void	acpi_tz_powerprofile(void *arg);
+static void	acpi_tz_power_profile(void *arg);
 
 static void	acpi_tz_thread(void *arg);
 static struct proc *acpi_tz_proc;
@@ -248,7 +249,7 @@ acpi_tz_attach(device_t dev)
      * invocation by our timeout.  We defer it like this so that the rest
      * of the subsystem has time to come up.
      */
-    EVENTHANDLER_REGISTER(powerprofile_change, acpi_tz_powerprofile, sc, 0);
+    EVENTHANDLER_REGISTER(power_profile_change, acpi_tz_power_profile, sc, 0);
     sc->tz_flags |= TZ_FLAG_GETPROFILE;
 
     /*
@@ -713,7 +714,7 @@ acpi_tz_timeout(struct acpi_tz_softc *sc)
 
     /* do we need to get the power profile settings? */
     if (sc->tz_flags & TZ_FLAG_GETPROFILE) {
-	acpi_tz_powerprofile((void *)sc);
+	acpi_tz_power_profile((void *)sc);
 	sc->tz_flags &= ~TZ_FLAG_GETPROFILE;
     }
 
@@ -733,12 +734,19 @@ acpi_tz_timeout(struct acpi_tz_softc *sc)
  * to get the ACPI lock itself.
  */
 static void
-acpi_tz_powerprofile(void *arg)
+acpi_tz_power_profile(void *arg)
 {
     ACPI_OBJECT_LIST		args;
     ACPI_OBJECT			obj;
     ACPI_STATUS			status;
     struct acpi_tz_softc	*sc = (struct acpi_tz_softc *)arg;
+    int				state;
+
+    state = power_profile_get_state();
+    if (state != POWER_PROFILE_PERFORMANCE &&
+        state != POWER_PROFILE_ECONOMY) {
+        return;
+    }
 
     ACPI_LOCK;
 
@@ -747,7 +755,7 @@ acpi_tz_powerprofile(void *arg)
 
 	/* call _SCP to set the new profile */
 	obj.Type = ACPI_TYPE_INTEGER;
-	obj.Integer.Value = (powerprofile_get_state() == POWERPROFILE_PERFORMANCE) ? 0 : 1;
+	obj.Integer.Value = (state == POWER_PROFILE_PERFORMANCE) ? 0 : 1;
 	args.Count = 1;
 	args.Pointer = &obj;
 	if (ACPI_FAILURE(status = AcpiEvaluateObject(sc->tz_handle, "_SCP", &args, NULL))) {
diff --git a/sys/dev/acpica/acpivar.h b/sys/dev/acpica/acpivar.h
index ac86c41..5a04cf5 100644
--- a/sys/dev/acpica/acpivar.h
+++ b/sys/dev/acpica/acpivar.h
@@ -358,21 +358,6 @@ extern int	acpi_cmbat_get_battinfo(int, struct acpi_battinfo *);
 
 extern int	acpi_acad_get_acline(int *);
 
-/*
- * System power API.
- *
- * XXX should this be further generalised?
- *
- */
-#define POWERPROFILE_PERFORMANCE	0
-#define POWERPROFILE_ECONOMY		1
-
-extern int	powerprofile_get_state(void);
-extern void	powerprofile_set_state(int state);
-
-typedef void (*powerprofile_change_hook)(void *);
-EVENTHANDLER_DECLARE(powerprofile_change, powerprofile_change_hook);
-
 #if defined(ACPI_MAX_THREADS) && ACPI_MAX_THREADS > 0
 /*
  * ACPI task kernel thread initialization.
diff --git a/sys/i386/apm/apm.c b/sys/i386/apm/apm.c
index 85d4bd2..9749e0c 100644
--- a/sys/i386/apm/apm.c
+++ b/sys/i386/apm/apm.c
@@ -906,6 +906,24 @@ apm_record_event(struct apm_softc *sc, u_int event_type)
 	return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */
 }
 
+/* Power profile */
+static void
+apm_power_profile(struct apm_softc *sc)
+{
+	int state;
+	struct apm_info info;
+	static int apm_acline = 0;
+
+	if (apm_get_info(&info))
+		return;
+
+	if (apm_acline != info.ai_acline) {
+		apm_acline = info.ai_acline;
+		state = apm_acline ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY;
+		power_profile_set_state(state);
+	}
+}
+
 /* Process APM event */
 static void
 apm_processevent(void)
@@ -975,6 +993,7 @@ apm_processevent(void)
 			break;
 		    OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE);
 			apm_record_event(sc, apm_event);
+			apm_power_profile(sc);
 			break;
 		    OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME);
 			apm_record_event(sc, apm_event);
@@ -982,6 +1001,7 @@ apm_processevent(void)
 			break;
 		    OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE);
 			apm_record_event(sc, apm_event);
+			apm_power_profile(sc);
 			break;
 		    case PMEV_NOEVENT:
 			break;
diff --git a/sys/i386/bios/apm.c b/sys/i386/bios/apm.c
index 85d4bd2..9749e0c 100644
--- a/sys/i386/bios/apm.c
+++ b/sys/i386/bios/apm.c
@@ -906,6 +906,24 @@ apm_record_event(struct apm_softc *sc, u_int event_type)
 	return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */
 }
 
+/* Power profile */
+static void
+apm_power_profile(struct apm_softc *sc)
+{
+	int state;
+	struct apm_info info;
+	static int apm_acline = 0;
+
+	if (apm_get_info(&info))
+		return;
+
+	if (apm_acline != info.ai_acline) {
+		apm_acline = info.ai_acline;
+		state = apm_acline ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY;
+		power_profile_set_state(state);
+	}
+}
+
 /* Process APM event */
 static void
 apm_processevent(void)
@@ -975,6 +993,7 @@ apm_processevent(void)
 			break;
 		    OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE);
 			apm_record_event(sc, apm_event);
+			apm_power_profile(sc);
 			break;
 		    OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME);
 			apm_record_event(sc, apm_event);
@@ -982,6 +1001,7 @@ apm_processevent(void)
 			break;
 		    OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE);
 			apm_record_event(sc, apm_event);
+			apm_power_profile(sc);
 			break;
 		    case PMEV_NOEVENT:
 			break;
diff --git a/sys/i386/i386/identcpu.c b/sys/i386/i386/identcpu.c
index 156d2c0..6aa0967 100644
--- a/sys/i386/i386/identcpu.c
+++ b/sys/i386/i386/identcpu.c
@@ -48,6 +48,7 @@
 #include <sys/systm.h>
 #include <sys/kernel.h>
 #include <sys/sysctl.h>
+#include <sys/power.h>
 
 #include <machine/asmacros.h>
 #include <machine/clock.h>
@@ -1135,9 +1136,40 @@ static u_int			 crusoe_longrun;
 static u_int			 crusoe_frequency;
 static u_int	 		 crusoe_voltage;
 static u_int	 		 crusoe_percentage;
+static u_int	 		 crusoe_performance_longrun = LONGRUN_MODE_PERFORMANCE;
+static u_int	 		 crusoe_economy_longrun = LONGRUN_MODE_ECONOMY;
 static struct sysctl_ctx_list	 crusoe_sysctl_ctx;
 static struct sysctl_oid	*crusoe_sysctl_tree;
 
+static void
+tmx86_longrun_power_profile(void *arg)
+{
+	int	state;
+	u_int	new;
+
+	state = power_profile_get_state();
+	if (state != POWER_PROFILE_PERFORMANCE &&
+	    state != POWER_PROFILE_ECONOMY) {
+		return;
+	}
+
+	switch (state) {
+	case POWER_PROFILE_PERFORMANCE:
+		new =crusoe_performance_longrun;
+		break;
+	case POWER_PROFILE_ECONOMY:
+		new = crusoe_economy_longrun;
+		break;
+	default:
+		new = tmx86_get_longrun_mode();
+		break;
+	}
+
+	if (tmx86_get_longrun_mode() != new) {
+		tmx86_set_longrun_mode(new);
+	}
+}
+
 static int
 tmx86_longrun_sysctl(SYSCTL_HANDLER_ARGS)
 {
@@ -1175,6 +1207,34 @@ tmx86_status_sysctl(SYSCTL_HANDLER_ARGS)
 	return (error);
 }
 
+static int
+tmx86_longrun_profile_sysctl(SYSCTL_HANDLER_ARGS)
+{
+	u_int32_t *argp;
+	u_int32_t arg;
+	int	error;
+
+	argp = (u_int32_t *)oidp->oid_arg1;
+	arg = *argp;
+	error = sysctl_handle_int(oidp, &arg, 0, req);
+
+	/* error or no new value */
+	if ((error != 0) || (req->newptr == NULL))
+		return (error);
+
+	/* range check */
+	if (arg >= LONGRUN_MODE_UNKNOWN)
+		return (EINVAL);
+
+	/* set new value and possibly switch */
+	*argp = arg;
+
+	tmx86_longrun_power_profile(NULL);
+
+	return (0);
+
+}
+
 static void
 setup_tmx86_longrun(void)
 {
@@ -1205,6 +1265,16 @@ setup_tmx86_longrun(void)
 		OID_AUTO, "percentage", CTLTYPE_INT | CTLFLAG_RD,
 		&crusoe_percentage, 0, tmx86_status_sysctl, "I",
 		"Processing performance (%)");
+	SYSCTL_ADD_PROC(&crusoe_sysctl_ctx, SYSCTL_CHILDREN(crusoe_sysctl_tree),
+		OID_AUTO, "performance_longrun", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_RW,
+		&crusoe_performance_longrun, 0, tmx86_longrun_profile_sysctl, "I", "");
+	SYSCTL_ADD_PROC(&crusoe_sysctl_ctx, SYSCTL_CHILDREN(crusoe_sysctl_tree),
+		OID_AUTO, "economy_longrun", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_RW,
+		&crusoe_economy_longrun, 0, tmx86_longrun_profile_sysctl, "I", "");
+
+	/* register performance profile change handler */
+	EVENTHANDLER_REGISTER(power_profile_change, tmx86_longrun_power_profile, NULL, 0);
+
 }
 
 static void
diff --git a/sys/kern/subr_power.c b/sys/kern/subr_power.c
index d73958c..7c96c9e 100644
--- a/sys/kern/subr_power.c
+++ b/sys/kern/subr_power.c
@@ -28,6 +28,7 @@
 
 #include <sys/param.h>
 #include <sys/systm.h>
+#include <sys/proc.h>
 
 #include <sys/power.h>
 
@@ -74,3 +75,33 @@ power_pm_suspend(int state)
 	power_pm_fn(POWER_CMD_SUSPEND, power_pm_arg, state);
 }
 
+/*
+ * Power profile.
+ */
+
+static int	power_profile_state = POWER_PROFILE_PERFORMANCE;
+
+int
+power_profile_get_state(void)
+{
+	return (power_profile_state);
+}
+
+void
+power_profile_set_state(int state) 
+{
+	int		changed;
+    
+	if (state != power_profile_state) {
+		power_profile_state = state;
+		changed = 1;
+		printf("system power profile changed to '%s'\n",
+		       (state == POWER_PROFILE_PERFORMANCE) ? "performance" : "economy");
+	} else {
+		changed = 0;
+	}
+
+	if (changed)
+		EVENTHANDLER_INVOKE(power_profile_change);
+}
+
diff --git a/sys/modules/acpi/Makefile b/sys/modules/acpi/Makefile
index 42a39df..e6f5c90 100644
--- a/sys/modules/acpi/Makefile
+++ b/sys/modules/acpi/Makefile
@@ -28,7 +28,7 @@ SRCS+=	utglobal.c utinit.c utmath.c utmisc.c utobject.c utxface.c
 
 # OSD layer
 SRCS+=	acpi.c acpi_acad.c acpi_battery.c acpi_button.c acpi_cmbat.c acpi_cpu.c
-SRCS+=	acpi_ec.c acpi_lid.c acpi_pcib.c acpi_powerprofile.c
+SRCS+=	acpi_ec.c acpi_lid.c acpi_pcib.c
 SRCS+=	acpi_powerres.c acpi_resource.c acpi_thermal.c acpi_timer.c
 SRCS+=	acpica_support.c
 SRCS+=  OsdDebug.c 
diff --git a/sys/sys/power.h b/sys/sys/power.h
index a94ed06..b870924 100644
--- a/sys/sys/power.h
+++ b/sys/sys/power.h
@@ -29,6 +29,8 @@
 #ifndef _SYS_POWER_H_
 #define _SYS_POWER_H_
 
+#include <sys/eventhandler.h>
+
 /* Power management system type */
 #define POWER_PM_TYPE_APM		0x00
 #define POWER_PM_TYPE_ACPI		0x01
@@ -47,5 +49,17 @@ extern int	 power_pm_register(u_int, power_pm_fn_t, void *);
 extern u_int	 power_pm_get_type(void);
 extern void	 power_pm_suspend(int);
 
+/*
+ * System power API.
+ */
+#define POWER_PROFILE_PERFORMANCE        0
+#define POWER_PROFILE_ECONOMY            1
+
+extern int	power_profile_get_state(void);
+extern void	power_profile_set_state(int);
+
+typedef void (*power_profile_change_hook)(void *);
+EVENTHANDLER_DECLARE(power_profile_change, power_profile_change_hook);
+
 #endif	/* !_SYS_POWER_H_ */