diff --git a/kernel/arch/earm/Makefile.inc b/kernel/arch/earm/Makefile.inc
index ca94480a8..7d048fd85 100644
--- a/kernel/arch/earm/Makefile.inc
+++ b/kernel/arch/earm/Makefile.inc
@@ -52,7 +52,7 @@ CPPFLAGS.findfp.c+= -I ${NETBSDSRCDIR}/lib/libc/include
 # that must live in their own unique namespace.
 #
 .for unpaged_obj in head.o pre_init.o direct_tty_utils.o \
-	pg_utils.o klib.o omap_serial.o utility.o arch_reset.o \
+	pg_utils.o klib.o omap_serial.o omap_rtc.o utility.o arch_reset.o \
 	${MINLIB_OBJS_UNPAGED} ${MINC_OBJS_UNPAGED} ${SYS_OBJS_UNPAGED}
 unpaged_${unpaged_obj}: ${unpaged_obj}
 	${OBJCOPY} --prefix-symbols=__k_unpaged_ ${.OBJDIR}/${unpaged_obj} $@
@@ -63,8 +63,8 @@ ORIG_UNPAGED_OBJS += ${unpaged_obj}
 CLEANFILES+= ${ORIG_UNPAGED_OBJS}
 
 SRCS+=	mpx.S arch_clock.c arch_do_vmctl.c arch_system.c \
-	omap_serial.c omap_timer.c omap_padconf.c omap_intr.c exception.c \
-	klib.S memory.c \
+	omap_serial.c omap_timer.c omap_padconf.c omap_intr.c omap_rtc.c \
+	exception.c klib.S memory.c \
 	protect.c direct_tty_utils.c arch_reset.c \
 	pg_utils.c phys_copy.S phys_memset.S exc.S
 OBJS.kernel+=	${UNPAGED_OBJS}
diff --git a/kernel/arch/earm/arch_reset.c b/kernel/arch/earm/arch_reset.c
index 2269711f6..fc0d3a623 100644
--- a/kernel/arch/earm/arch_reset.c
+++ b/kernel/arch/earm/arch_reset.c
@@ -8,12 +8,15 @@
 #include <assert.h>
 #include <signal.h>
 #include <machine/vm.h>
+#include <io.h>
 
+#include <minix/reboot.h>
 #include <minix/u64.h>
 
 #include "archconst.h"
 #include "arch_proto.h"
 #include "serial.h"
+#include "omap_rtc.h"
 #include "kernel/proc.h"
 #include "kernel/debug.h"
 #include "direct_utils.h"
@@ -34,9 +37,48 @@ reset(void)
     while (1);
 }
 
+void
+poweroff(void)
+{
+
+/*
+ * The am335x can signal an external power management chip to cut the power
+ * by toggling the PMIC_POWER_EN pin. It might fail if there isn't an
+ * external PMIC or if the PMIC hasn't been configured to respond to toggles.
+ * The only way to pull the pin low is via ALARM2 (see TRM 20.3.3.8).
+ * At this point PM should have already signaled readclock to set the alarm.
+ */
+#ifdef AM335X
+
+	/* Powers down the SoC within 3 seconds */
+	direct_print("PMIC Power-Off in 3 Seconds\n");
+
+	/* rtc was frozen to prevent premature power-off, unfreeze it now */
+	omap3_rtc_run();
+
+	/* wait for the alarm to go off and PMIC to disable power to SoC */
+	while (1);
+
+#endif /* AM335X */
+
+	/* fallback option: hang */
+	direct_print("Unable to power-off this device.");
+	while (1);
+}
+
 __dead void
 arch_shutdown(int how)
 {
+	switch (how) {
+
+	case RBT_POWEROFF:
+		/* Power off if possible, hang otherwise */
+		poweroff();
+		NOT_REACHABLE;
+
+	default:
+		break;
+	}
 	while (1);
 }
 
diff --git a/kernel/arch/earm/arch_system.c b/kernel/arch/earm/arch_system.c
index 03c0fa280..0f0fc3a0b 100644
--- a/kernel/arch/earm/arch_system.c
+++ b/kernel/arch/earm/arch_system.c
@@ -128,6 +128,9 @@ void arch_init(void)
 
 	/* configure i2c pinmux */
 	omap3_padconf_init();
+
+	/* map memory for rtc */
+	omap3_rtc_init();
 }
 
 /*===========================================================================*
diff --git a/kernel/arch/earm/omap_rtc.c b/kernel/arch/earm/omap_rtc.c
new file mode 100644
index 000000000..849d77fbd
--- /dev/null
+++ b/kernel/arch/earm/omap_rtc.c
@@ -0,0 +1,55 @@
+/*
+ * This is a mini driver for the AM335X Real Time Clock. The majority of the
+ * work is done in user space in readclock, but for power-off the clock needs
+ * to be put into run mode at the last possible moment in arch_reset.c. This
+ * driver just implements mapping the memory and re-starting the clock.
+ */
+
+#include <assert.h>
+#include <sys/types.h>
+#include <machine/cpu.h>
+#include <minix/type.h>
+#include <io.h>
+
+#include "kernel/kernel.h"
+#include "kernel/proc.h"
+#include "kernel/vm.h"
+#include "kernel/proto.h"
+#include "arch_proto.h"
+#include "omap_rtc.h"
+
+#define RTC_SS_BASE 0x44e3e000
+#define RTC_SS_SIZE 0x1000
+#define RTC_CTRL_REG 0x40
+#define RTC_CTRL_RTC_STOP_BIT 0
+
+struct omap_rtc
+{
+	vir_bytes base;
+	vir_bytes size;
+};
+
+static struct omap_rtc omap_rtc = {
+	.base = RTC_SS_BASE,
+	.size = RTC_SS_SIZE
+};
+
+static kern_phys_map rtc_phys_map;
+
+void
+omap3_rtc_init(void)
+{
+#ifdef AM335X
+	kern_phys_map_ptr(omap_rtc.base, omap_rtc.size, &rtc_phys_map,
+	    &omap_rtc.base);
+#endif /* AM335X */
+}
+
+void
+omap3_rtc_run(void)
+{
+#ifdef AM335X
+	/* Setting the stop bit starts the RTC running */
+	mmio_set((omap_rtc.base + RTC_CTRL_REG), (1 << RTC_CTRL_RTC_STOP_BIT));
+#endif /* AM335X */
+}
diff --git a/kernel/arch/earm/omap_rtc.h b/kernel/arch/earm/omap_rtc.h
new file mode 100644
index 000000000..cbed3a561
--- /dev/null
+++ b/kernel/arch/earm/omap_rtc.h
@@ -0,0 +1,7 @@
+#ifndef __OMAP_RTC_H
+#define __OMAP_RTC_H
+
+void omap3_rtc_init(void);
+void omap3_rtc_run(void);
+
+#endif /* __OMAP_RTC_H */