diff --git a/sys/arch/arm/xscale/becc_timer.c b/sys/arch/arm/xscale/becc_timer.c
index b726ae248c03..dd736a9850e5 100644
--- a/sys/arch/arm/xscale/becc_timer.c
+++ b/sys/arch/arm/xscale/becc_timer.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: becc_timer.c,v 1.3 2003/07/15 00:24:52 lukem Exp $	*/
+/*	$NetBSD: becc_timer.c,v 1.4 2003/07/26 05:51:11 thorpej Exp $	*/
 
 /*
  * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
@@ -40,13 +40,15 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: becc_timer.c,v 1.3 2003/07/15 00:24:52 lukem Exp $");
+__KERNEL_RCSID(0, "$NetBSD: becc_timer.c,v 1.4 2003/07/26 05:51:11 thorpej Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/kernel.h>
 #include <sys/time.h>
 
+#include <dev/clock_subr.h>
+
 #include <machine/bus.h>
 #include <arm/cpufunc.h>
 
@@ -264,17 +266,73 @@ delay(u_int n)
 	}
 }
 
+todr_chip_handle_t todr_handle;
+
+/*
+ * todr_attach:
+ *
+ *	Set the specified time-of-day register as the system real-time clock.
+ */
+void
+todr_attach(todr_chip_handle_t todr)
+{
+
+	if (todr_handle)
+		panic("todr_attach: rtc already configured");
+}
+
 /*
  * inittodr:
  *
  *	Initialize time from the time-of-day register.
  */
+#define	MINYEAR		2003	/* minimum plausible year */
 void
 inittodr(time_t base)
 {
+	time_t deltat;
+	int badbase;
 
-	time.tv_sec = base;
-	time.tv_usec = 0;
+	if (base < (MINYEAR - 1970) * SECYR) {
+		printf("WARNING: preposterous time in file system");
+		/* read the system clock anyway */
+		base = (MINYEAR - 1970) * SECYR;
+		badbase = 1;
+	} else
+		badbase = 0;
+
+	if (todr_handle == NULL ||
+	    todr_gettime(todr_handle, (struct timeval *)&time) != 0 ||
+	    time.tv_sec == 0) {
+		/*
+		 * Believe the time in the file system for lack of
+		 * anything better, resetting the TODR.
+		 */
+		time.tv_sec = base;
+		time.tv_usec = 0;
+		if (todr_handle != NULL && !badbase) {
+			printf("WARNING: preposterous clock chip time\n");
+			resettodr();
+		}
+		goto bad;
+	}
+
+	if (!badbase) {
+		/*
+		 * See if we tained/lost two or more days; if
+		 * so, assume something is amiss.
+		 */
+		deltat = time.tv_sec - base;
+		if (deltat < 0)
+			deltat = -deltat;
+		if (deltat < 2 * SECDAY)
+			return;		/* all is well */
+		printf("WARNING: clock %s %ld days\n",
+		    time.tv_sec < base ? "lost" : "gained",
+		    (long)deltat / SECDAY);
+	}
+ bad:
+	printf("WARNING: CHECK AND RESET THE DATE!\n");
 }
 
 /*
@@ -285,6 +343,13 @@ inittodr(time_t base)
 void
 resettodr(void)
 {
+
+	if (time.tv_sec == 0)
+		return;
+
+	if (todr_handle != NULL &&
+	    todr_settime(todr_handle, (struct timeval *)&time) != 0)
+		printf("resettodr: failed to set time\n");
 }
 
 /*
diff --git a/sys/arch/arm/xscale/i80321_timer.c b/sys/arch/arm/xscale/i80321_timer.c
index 3ac64b8e1b30..b61e8e794dc6 100644
--- a/sys/arch/arm/xscale/i80321_timer.c
+++ b/sys/arch/arm/xscale/i80321_timer.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: i80321_timer.c,v 1.5 2003/07/15 00:24:54 lukem Exp $	*/
+/*	$NetBSD: i80321_timer.c,v 1.6 2003/07/26 05:51:11 thorpej Exp $	*/
 
 /*
  * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
@@ -40,7 +40,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: i80321_timer.c,v 1.5 2003/07/15 00:24:54 lukem Exp $");
+__KERNEL_RCSID(0, "$NetBSD: i80321_timer.c,v 1.6 2003/07/26 05:51:11 thorpej Exp $");
 
 #include "opt_perfctrs.h"
 
@@ -49,6 +49,8 @@ __KERNEL_RCSID(0, "$NetBSD: i80321_timer.c,v 1.5 2003/07/15 00:24:54 lukem Exp $
 #include <sys/kernel.h>
 #include <sys/time.h>
 
+#include <dev/clock_subr.h>
+
 #include <machine/bus.h>
 #include <arm/cpufunc.h>
 
@@ -315,17 +317,73 @@ delay(u_int n)
 	}
 }
 
+todr_chip_handle_t todr_handle;
+
+/*
+ * todr_attach:
+ *
+ *	Set the specified time-of-day register as the system real-time clock.
+ */
+void
+todr_attach(todr_chip_handle_t todr)
+{
+
+	if (todr_handle)
+		panic("todr_attach: rtc already configured");
+}
+
 /*
  * inittodr:
  *
  *	Initialize time from the time-of-day register.
  */
+#define	MINYEAR		2003	/* minimum plausible year */
 void
 inittodr(time_t base)
 {
+	time_t deltat;
+	int badbase;
 
-	time.tv_sec = base;
-	time.tv_usec = 0;
+	if (base < (MINYEAR - 1970) * SECYR) {
+		printf("WARNING: preposterous time in file system");
+		/* read the system clock anyway */
+		base = (MINYEAR - 1970) * SECYR;
+		badbase = 1;
+	} else
+		badbase = 0;
+
+	if (todr_handle == NULL ||
+	    todr_gettime(todr_handle, (struct timeval *)&time) != 0 ||
+	    time.tv_sec == 0) {
+		/*
+		 * Believe the time in the file system for lack of
+		 * anything better, resetting the TODR.
+		 */
+		time.tv_sec = base;
+		time.tv_usec = 0;
+		if (todr_handle != NULL && !badbase) {
+			printf("WARNING: preposterous clock chip time\n");
+			resettodr();
+		}
+		goto bad;
+	}
+
+	if (!badbase) {
+		/*
+		 * See if we tained/lost two or more days; if
+		 * so, assume something is amiss.
+		 */
+		deltat = time.tv_sec - base;
+		if (deltat < 0)
+			deltat = -deltat;
+		if (deltat < 2 * SECDAY)
+			return;		/* all is well */
+		printf("WARNING: clock %s %ld days\n",
+		    time.tv_sec < base ? "lost" : "gained",
+		    (long)deltat / SECDAY);
+	}
+ bad:
+	printf("WARNING: CHECK AND RESET THE DATE!\n");
 }
 
 /*
@@ -336,6 +394,13 @@ inittodr(time_t base)
 void
 resettodr(void)
 {
+
+	if (time.tv_sec == 0)
+		return;
+
+	if (todr_handle != NULL &&
+	    todr_settime(todr_handle, (struct timeval *)&time) != 0)
+		printf("resettodr: failed to set time\n");
 }
 
 /*
diff --git a/sys/arch/arm/xscale/ixp425_timer.c b/sys/arch/arm/xscale/ixp425_timer.c
index 70d5164c5194..60bbc0f5e2df 100644
--- a/sys/arch/arm/xscale/ixp425_timer.c
+++ b/sys/arch/arm/xscale/ixp425_timer.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: ixp425_timer.c,v 1.1 2003/05/23 00:57:26 ichiro Exp $ */
+/*	$NetBSD: ixp425_timer.c,v 1.2 2003/07/26 05:51:11 thorpej Exp $ */
 
 /*
  * Copyright (c) 2003
@@ -34,7 +34,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ixp425_timer.c,v 1.1 2003/05/23 00:57:26 ichiro Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ixp425_timer.c,v 1.2 2003/07/26 05:51:11 thorpej Exp $");
 
 #include "opt_perfctrs.h"
 
@@ -45,6 +45,8 @@ __KERNEL_RCSID(0, "$NetBSD: ixp425_timer.c,v 1.1 2003/05/23 00:57:26 ichiro Exp
 #include <sys/time.h>
 #include <sys/device.h>
 
+#include <dev/clock_subr.h>
+
 #include <machine/bus.h>
 #include <machine/intr.h>
 
@@ -282,17 +284,73 @@ delay(u_int n)
 	}
 }
 
+todr_chip_handle_t todr_handle;
+
+/*
+ * todr_attach:
+ *
+ *	Set the specified time-of-day register as the system real-time clock.
+ */
+void
+todr_attach(todr_chip_handle_t todr)
+{
+
+	if (todr_handle)
+		panic("todr_attach: rtc already configured");
+}
+
 /*
  * inittodr:
  *
  *	Initialize time from the time-of-day register.
  */
+#define	MINYEAR		2003	/* minimum plausible year */
 void
 inittodr(time_t base)
 {
+	time_t deltat;
+	int badbase;
 
-	time.tv_sec = base;
-	time.tv_usec = 0;
+	if (base < (MINYEAR - 1970) * SECYR) {
+		printf("WARNING: preposterous time in file system");
+		/* read the system clock anyway */
+		base = (MINYEAR - 1970) * SECYR;
+		badbase = 1;
+	} else
+		badbase = 0;
+
+	if (todr_handle == NULL ||
+	    todr_gettime(todr_handle, (struct timeval *)&time) != 0 ||
+	    time.tv_sec == 0) {
+		/*
+		 * Believe the time in the file system for lack of
+		 * anything better, resetting the TODR.
+		 */
+		time.tv_sec = base;
+		time.tv_usec = 0;
+		if (todr_handle != NULL && !badbase) {
+			printf("WARNING: preposterous clock chip time\n");
+			resettodr();
+		}
+		goto bad;
+	}
+
+	if (!badbase) {
+		/*
+		 * See if we tained/lost two or more days; if
+		 * so, assume something is amiss.
+		 */
+		deltat = time.tv_sec - base;
+		if (deltat < 0)
+			deltat = -deltat;
+		if (deltat < 2 * SECDAY)
+			return;		/* all is well */
+		printf("WARNING: clock %s %ld days\n",
+		    time.tv_sec < base ? "lost" : "gained",
+		    (long)deltat / SECDAY);
+	}
+ bad:
+	printf("WARNING: CHECK AND RESET THE DATE!\n");
 }
 
 /*
@@ -303,6 +361,13 @@ inittodr(time_t base)
 void
 resettodr(void)
 {
+
+	if (time.tv_sec == 0)
+		return;
+
+	if (todr_handle != NULL &&
+	    todr_settime(todr_handle, (struct timeval *)&time) != 0)
+		printf("resettodr: failed to set time\n");
 }
 
 /*
diff --git a/sys/arch/evbarm/iq80310/iq80310_timer.c b/sys/arch/evbarm/iq80310/iq80310_timer.c
index 5c929e3d2731..28de4493a0bc 100644
--- a/sys/arch/evbarm/iq80310/iq80310_timer.c
+++ b/sys/arch/evbarm/iq80310/iq80310_timer.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: iq80310_timer.c,v 1.12 2003/07/15 00:25:03 lukem Exp $	*/
+/*	$NetBSD: iq80310_timer.c,v 1.13 2003/07/26 05:55:03 thorpej Exp $	*/
 
 /*
  * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
@@ -47,13 +47,15 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: iq80310_timer.c,v 1.12 2003/07/15 00:25:03 lukem Exp $");
+__KERNEL_RCSID(0, "$NetBSD: iq80310_timer.c,v 1.13 2003/07/26 05:55:03 thorpej Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/kernel.h>
 #include <sys/time.h>
 
+#include <dev/clock_subr.h>
+
 #include <machine/bus.h>
 #include <arm/cpufunc.h>
 
@@ -317,17 +319,73 @@ delay(u_int n)
 	}
 }
 
+todr_chip_handle_t todr_handle;
+
+/*
+ * todr_attach:
+ *
+ *	Set the specified time-of-day register as the system real-time clock.
+ */
+void
+todr_attach(todr_chip_handle_t todr)
+{
+
+	if (todr_handle)
+		panic("todr_attach: rtc already configured");
+}
+
 /*
  * inittodr:
  *
  *	Initialize time from the time-of-day register.
  */
+#define	MINYEAR		2003	/* minimum plausible year */
 void
 inittodr(time_t base)
 {
+	time_t deltat;
+	int badbase;
 
-	time.tv_sec = base;
-	time.tv_usec = 0;
+	if (base < (MINYEAR - 1970) * SECYR) {
+		printf("WARNING: preposterous time in file system");
+		/* read the system clock anyway */
+		base = (MINYEAR - 1970) * SECYR;
+		badbase = 1;
+	} else
+		badbase = 0;
+
+	if (todr_handle == NULL ||
+	    todr_gettime(todr_handle, (struct timeval *)&time) != 0 ||
+	    time.tv_sec == 0) {
+		/*
+		 * Believe the time in the file system for lack of
+		 * anything better, resetting the TODR.
+		 */
+		time.tv_sec = base;
+		time.tv_usec = 0;
+		if (todr_handle != NULL && !badbase) {
+			printf("WARNING: preposterous clock chip time\n");
+			resettodr();
+		}
+		goto bad;
+	}
+
+	if (!badbase) {
+		/*
+		 * See if we tained/lost two or more days; if
+		 * so, assume something is amiss.
+		 */
+		deltat = time.tv_sec - base;
+		if (deltat < 0)
+			deltat = -deltat;
+		if (deltat < 2 * SECDAY)
+			return;		/* all is well */
+		printf("WARNING: clock %s %ld days\n",
+		    time.tv_sec < base ? "lost" : "gained",
+		    (long)deltat / SECDAY);
+	}
+ bad:
+	printf("WARNING: CHECK AND RESET THE DATE!\n");
 }
 
 /*
@@ -338,6 +396,13 @@ inittodr(time_t base)
 void
 resettodr(void)
 {
+
+	if (time.tv_sec == 0)
+		return;
+
+	if (todr_handle != NULL &&
+	    todr_settime(todr_handle, (struct timeval *)&time) != 0)
+		printf("resettodr: failed to set time\n");
 }
 
 /*