Some fix for the recent apm module changes.

 - Now that apm loadable module can inform its existence to other kernel
   components  (e.g. i386/isa/clock.c:startrtclock()'s TCS hack).
 - Exchange priority of SI_SUB_CPU and SI_SUB_KLD for above purpose.
 - Add simple arbitration mechanism for APM vs. ACPI.  This prevents
   the kernel enables both of them.
 - Remove obsolete `#ifdef DEV_APM' related code.
 - Add abstracted interface for Powermanagement operations.  Public apm(4)
   functions, such as apm_suspend(), should be replaced new interfaces.
   Currently only power_pm_suspend (successor of apm_suspend) is implemented.

Reviewed by:	peter, arch@ and audit@

1 files changed, 76 insertions, 0 deletions

diff --git a/sys/kern/subr_power.c b/sys/kern/subr_power.c
new file mode 100644
index 0000000..d73958c
--- /dev/null
+++ b/sys/kern/subr_power.c
@@ -0,0 +1,76 @@
+/*-
+ * Copyright (c) 2001 Mitsuru IWASAKI
+ * 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 <sys/param.h>
+#include <sys/systm.h>
+
+#include <sys/power.h>
+
+static u_int		 power_pm_type	= POWER_PM_TYPE_NONE;
+static power_pm_fn_t	 power_pm_fn	= NULL;
+static void		*power_pm_arg	= NULL;
+
+int
+power_pm_register(u_int pm_type, power_pm_fn_t pm_fn, void *pm_arg)
+{
+	int	error;
+
+	if (power_pm_type == POWER_PM_TYPE_NONE ||
+	    power_pm_type == pm_type) {
+		power_pm_type	= pm_type;
+		power_pm_fn	= pm_fn;
+		power_pm_arg	= pm_arg;
+		error = 0;
+	} else {
+		error = ENXIO;
+	}
+
+	return (error);
+}
+
+u_int
+power_pm_get_type(void)
+{
+
+	return (power_pm_type);
+}
+
+void
+power_pm_suspend(int state)
+{
+	if (power_pm_fn == NULL)
+		return;
+
+	if (state != POWER_SLEEP_STATE_STANDBY &&
+	    state != POWER_SLEEP_STATE_SUSPEND &&
+	    state != POWER_SLEEP_STATE_HIBERNATE)
+		return;
+
+	power_pm_fn(POWER_CMD_SUSPEND, power_pm_arg, state);
+}
+