Index: head/sys/dev/beri/virtio/virtio_mmio_platform.c
===================================================================
--- head/sys/dev/beri/virtio/virtio_mmio_platform.c	(nonexistent)
+++ head/sys/dev/beri/virtio/virtio_mmio_platform.c	(revision 274714)
@@ -0,0 +1,227 @@
+/*-
+ * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
+ * All rights reserved.
+ *
+ * This software was developed by SRI International and the University of
+ * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
+ * ("CTSRD"), as part of the DARPA CRASH research programme.
+ *
+ * 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.
+ */
+
+/*
+ * BERI interface for Virtio MMIO bus.
+ *
+ * This driver provides interrupt-engine for software-implemented
+ * Virtio MMIO backend.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/malloc.h>
+#include <sys/rman.h>
+#include <sys/timeet.h>
+#include <sys/timetc.h>
+#include <sys/watchdog.h>
+
+#include <machine/bus.h>
+#include <machine/fdt.h>
+#include <machine/cpu.h>
+#include <machine/cache.h>
+
+#include <dev/fdt/fdt_common.h>
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include <dev/beri/virtio/virtio_mmio_platform.h>
+#include <dev/virtio/mmio/virtio_mmio.h>
+#include <dev/altera/pio/pio.h>
+
+#include "virtio_mmio_if.h"
+#include "pio_if.h"
+
+static void platform_intr(void *arg);
+
+struct virtio_mmio_platform_softc {
+	struct resource		*res[1];
+	bus_space_tag_t		bst;
+	bus_space_handle_t	bsh;
+	device_t		dev;
+	void			(*intr_handler)(void *);
+	void			*ih_user;
+	device_t		pio_recv;
+	device_t		pio_send;
+};
+
+static int
+setup_pio(struct virtio_mmio_platform_softc *sc, char *name, device_t *dev)
+{
+	phandle_t pio_node;
+	struct fdt_ic *ic;
+	phandle_t xref;
+	phandle_t node;
+
+	if ((node = ofw_bus_get_node(sc->dev)) == -1)
+		return (ENXIO);
+
+	if (OF_searchencprop(node, name, &xref,
+		sizeof(xref)) == -1) {
+		return (ENXIO);
+	}
+
+	pio_node = OF_node_from_xref(xref);
+	SLIST_FOREACH(ic, &fdt_ic_list_head, fdt_ics) {
+		if (ic->iph == pio_node) {
+			*dev = ic->dev;
+			PIO_CONFIGURE(*dev, PIO_OUT_ALL,
+					PIO_UNMASK_ALL);
+			return (0);
+		}
+	}
+
+	return (ENXIO);
+}
+
+static int
+virtio_mmio_platform_probe(device_t dev)
+{
+
+	if (!ofw_bus_status_okay(dev))
+		return (ENXIO);
+
+	if (!ofw_bus_is_compatible(dev, "beri,virtio_mmio_platform"))
+		return (ENXIO);
+
+	device_set_desc(dev, "Virtio MMIO platform");
+	return (BUS_PROBE_DEFAULT);
+}
+
+static int
+virtio_mmio_platform_attach(device_t dev)
+{
+	struct virtio_mmio_platform_softc *sc;
+	struct fdt_ic *fic;
+	phandle_t node;
+
+	sc = device_get_softc(dev);
+	sc->dev = dev;
+
+	if (setup_pio(sc, "pio-send", &sc->pio_send) != 0)
+		return (ENXIO);
+	if (setup_pio(sc, "pio-recv", &sc->pio_recv) != 0)
+		return (ENXIO);
+
+	if ((node = ofw_bus_get_node(sc->dev)) == -1)
+		return (ENXIO);
+
+	fic = malloc(sizeof(*fic), M_DEVBUF, M_WAITOK|M_ZERO);
+	fic->iph = node;
+	fic->dev = dev;
+	SLIST_INSERT_HEAD(&fdt_ic_list_head, fic, fdt_ics);
+
+	return (0);
+}
+
+static int
+platform_note(device_t dev, size_t offset)
+{
+	struct virtio_mmio_platform_softc *sc;
+
+	sc = device_get_softc(dev);
+
+	if (offset == VIRTIO_MMIO_QUEUE_NOTIFY) {
+		mips_dcache_wbinv_all();
+		PIO_SET(sc->pio_send, Q_NOTIFY, 1);
+	}
+
+	if (offset == VIRTIO_MMIO_QUEUE_PFN) {
+		mips_dcache_wbinv_all();
+		PIO_SET(sc->pio_send, Q_PFN, 1);
+	}
+
+	return (0);
+}
+
+static void
+platform_intr(void *arg)
+{
+	struct virtio_mmio_platform_softc *sc;
+	int reg;
+
+	sc = arg;
+
+	/* Read pending */
+	reg = PIO_READ(sc->pio_recv);
+
+	/* Ack */
+	PIO_SET(sc->pio_recv, reg, 0);
+
+	/* Writeback, invalidate cache */
+	mips_dcache_wbinv_all();
+
+	if (sc->intr_handler != NULL)
+		sc->intr_handler(sc->ih_user);
+}
+
+static int
+platform_setup_intr(device_t dev, device_t mmio_dev,
+			void *intr_handler, void *ih_user)
+{
+	struct virtio_mmio_platform_softc *sc;
+
+	sc = device_get_softc(dev);
+
+	sc->intr_handler = intr_handler;
+	sc->ih_user = ih_user;
+
+	PIO_SETUP_IRQ(sc->pio_recv, platform_intr, sc);
+
+	return (0);
+}
+
+static device_method_t virtio_mmio_platform_methods[] = {
+	DEVMETHOD(device_probe,		virtio_mmio_platform_probe),
+	DEVMETHOD(device_attach,	virtio_mmio_platform_attach),
+
+	/* virtio_mmio_if.h */
+	DEVMETHOD(virtio_mmio_note,		platform_note),
+	DEVMETHOD(virtio_mmio_setup_intr,	platform_setup_intr),
+	DEVMETHOD_END
+};
+
+static driver_t virtio_mmio_platform_driver = {
+	"virtio_mmio_platform",
+	virtio_mmio_platform_methods,
+	sizeof(struct virtio_mmio_platform_softc),
+};
+
+static devclass_t virtio_mmio_platform_devclass;
+
+DRIVER_MODULE(virtio_mmio_platform, simplebus, virtio_mmio_platform_driver,
+	virtio_mmio_platform_devclass, 0, 0);

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___________________________________________________________________
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Index: head/sys/dev/beri/virtio/virtio_mmio_platform.h
===================================================================
--- head/sys/dev/beri/virtio/virtio_mmio_platform.h	(nonexistent)
+++ head/sys/dev/beri/virtio/virtio_mmio_platform.h	(revision 274714)
@@ -0,0 +1,35 @@
+/*-
+ * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
+ * All rights reserved.
+ *
+ * This software was developed by SRI International and the University of
+ * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
+ * ("CTSRD"), as part of the DARPA CRASH research programme.
+ *
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#define	Q_NOTIFY	0x1
+#define	Q_PFN		0x2
+#define	Q_INTR		0x4

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