Initial Spring 2016 commit.

2015-12-23 00:50:04 +00:00
commit cafa9f5690
732 changed files with 92195 additions and 0 deletions
--- a/kern/dev/generic/rtclock.c
+++ b/kern/dev/generic/rtclock.c
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
+ *	The President and Fellows of Harvard College.
+ *
+ * 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.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY 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 UNIVERSITY 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.
+ */
+
+/*
+ * Machine-independent generic clock "device".
+ *
+ * Basically, all we do is remember something that can be used for
+ * handling requests for the current time, and provide the gettime()
+ * function to the rest of the kernel.
+ *
+ * The kernel config mechanism can be used to explicitly choose which
+ * of the available clocks to use, if more than one is available.
+ *
+ * The system will panic if gettime() is called and there is no clock.
+ */
+
+#include <types.h>
+#include <kern/errno.h>
+#include <lib.h>
+#include <clock.h>
+#include <generic/rtclock.h>
+#include "autoconf.h"
+
+static struct rtclock_softc *the_clock = NULL;
+
+int
+config_rtclock(struct rtclock_softc *rtc, int unit)
+{
+	/* We use only the first clock device. */
+	if (unit!=0) {
+		return ENODEV;
+	}
+
+	KASSERT(the_clock==NULL);
+	the_clock = rtc;
+	return 0;
+}
+
+void
+gettime(struct timespec *ts)
+{
+	KASSERT(the_clock!=NULL);
+	the_clock->rtc_gettime(the_clock->rtc_devdata, ts);
+}