diff --git a/sys/mips/rmi/bus_space_rmi_pci.c b/sys/mips/rmi/bus_space_rmi_pci.c
new file mode 100644
index 000000000000..9f6f25af930d
--- /dev/null
+++ b/sys/mips/rmi/bus_space_rmi_pci.c
@@ -0,0 +1,760 @@
+/*-
+ * Copyright (c) 2009 RMI Corporation
+ * 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.
+ *
+ */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/endian.h>
+#include <sys/malloc.h>
+#include <sys/ktr.h>
+
+#include <vm/vm.h>
+#include <vm/pmap.h>
+#include <vm/vm_kern.h>
+#include <vm/vm_extern.h>
+
+#include <machine/bus.h>
+#include <machine/cache.h>
+
+static int 
+rmi_pci_bus_space_map(void *t, bus_addr_t addr,
+    bus_size_t size, int flags,
+    bus_space_handle_t * bshp);
+
+static void 
+rmi_pci_bus_space_unmap(void *t, bus_space_handle_t bsh,
+    bus_size_t size);
+
+static int 
+rmi_pci_bus_space_subregion(void *t,
+    bus_space_handle_t bsh,
+    bus_size_t offset, bus_size_t size,
+    bus_space_handle_t * nbshp);
+
+static u_int8_t 
+rmi_pci_bus_space_read_1(void *t,
+    bus_space_handle_t handle,
+    bus_size_t offset);
+
+static u_int16_t 
+rmi_pci_bus_space_read_2(void *t,
+    bus_space_handle_t handle,
+    bus_size_t offset);
+
+static u_int32_t 
+rmi_pci_bus_space_read_4(void *t,
+    bus_space_handle_t handle,
+    bus_size_t offset);
+
+static void 
+rmi_pci_bus_space_read_multi_1(void *t,
+    bus_space_handle_t handle,
+    bus_size_t offset, u_int8_t * addr,
+    size_t count);
+
+static void 
+rmi_pci_bus_space_read_multi_2(void *t,
+    bus_space_handle_t handle,
+    bus_size_t offset, u_int16_t * addr,
+    size_t count);
+
+static void 
+rmi_pci_bus_space_read_multi_4(void *t,
+    bus_space_handle_t handle,
+    bus_size_t offset, u_int32_t * addr,
+    size_t count);
+
+static void 
+rmi_pci_bus_space_read_region_1(void *t,
+    bus_space_handle_t bsh,
+    bus_size_t offset, u_int8_t * addr,
+    size_t count);
+
+static void 
+rmi_pci_bus_space_read_region_2(void *t,
+    bus_space_handle_t bsh,
+    bus_size_t offset, u_int16_t * addr,
+    size_t count);
+
+static void 
+rmi_pci_bus_space_read_region_4(void *t,
+    bus_space_handle_t bsh,
+    bus_size_t offset, u_int32_t * addr,
+    size_t count);
+
+static void 
+rmi_pci_bus_space_write_1(void *t,
+    bus_space_handle_t handle,
+    bus_size_t offset, u_int8_t value);
+
+static void 
+rmi_pci_bus_space_write_2(void *t,
+    bus_space_handle_t handle,
+    bus_size_t offset, u_int16_t value);
+
+static void 
+rmi_pci_bus_space_write_4(void *t,
+    bus_space_handle_t handle,
+    bus_size_t offset, u_int32_t value);
+
+static void 
+rmi_pci_bus_space_write_multi_1(void *t,
+    bus_space_handle_t handle,
+    bus_size_t offset,
+    const u_int8_t * addr,
+    size_t count);
+
+static void 
+rmi_pci_bus_space_write_multi_2(void *t,
+    bus_space_handle_t handle,
+    bus_size_t offset,
+    const u_int16_t * addr,
+    size_t count);
+
+static void 
+rmi_pci_bus_space_write_multi_4(void *t,
+    bus_space_handle_t handle,
+    bus_size_t offset,
+    const u_int32_t * addr,
+    size_t count);
+
+static void 
+rmi_pci_bus_space_write_region_2(void *t,
+    bus_space_handle_t bsh,
+    bus_size_t offset,
+    const u_int16_t * addr,
+    size_t count);
+
+static void 
+rmi_pci_bus_space_write_region_4(void *t,
+    bus_space_handle_t bsh,
+    bus_size_t offset,
+    const u_int32_t * addr,
+    size_t count);
+
+
+static void 
+rmi_pci_bus_space_set_region_2(void *t,
+    bus_space_handle_t bsh,
+    bus_size_t offset, u_int16_t value,
+    size_t count);
+static void 
+rmi_pci_bus_space_set_region_4(void *t,
+    bus_space_handle_t bsh,
+    bus_size_t offset, u_int32_t value,
+    size_t count);
+
+static void 
+rmi_pci_bus_space_barrier(void *tag __unused, bus_space_handle_t bsh __unused,
+    bus_size_t offset __unused, bus_size_t len __unused, int flags);
+
+static void 
+rmi_pci_bus_space_copy_region_2(void *t,
+    bus_space_handle_t bsh1,
+    bus_size_t off1,
+    bus_space_handle_t bsh2,
+    bus_size_t off2, size_t count);
+
+u_int8_t 
+rmi_pci_bus_space_read_stream_1(void *t, bus_space_handle_t handle,
+    bus_size_t offset);
+
+static u_int16_t 
+rmi_pci_bus_space_read_stream_2(void *t, bus_space_handle_t handle,
+    bus_size_t offset);
+
+static u_int32_t 
+rmi_pci_bus_space_read_stream_4(void *t, bus_space_handle_t handle,
+    bus_size_t offset);
+static void 
+rmi_pci_bus_space_read_multi_stream_1(void *t,
+    bus_space_handle_t handle,
+    bus_size_t offset, u_int8_t * addr,
+    size_t count);
+
+static void 
+rmi_pci_bus_space_read_multi_stream_2(void *t,
+    bus_space_handle_t handle,
+    bus_size_t offset, u_int16_t * addr,
+    size_t count);
+
+static void 
+rmi_pci_bus_space_read_multi_stream_4(void *t,
+    bus_space_handle_t handle,
+    bus_size_t offset, u_int32_t * addr,
+    size_t count);
+
+void 
+rmi_pci_bus_space_write_stream_1(void *t, bus_space_handle_t bsh,
+    bus_size_t offset, u_int8_t value);
+static void 
+rmi_pci_bus_space_write_stream_2(void *t, bus_space_handle_t handle,
+    bus_size_t offset, u_int16_t value);
+
+static void 
+rmi_pci_bus_space_write_stream_4(void *t, bus_space_handle_t handle,
+    bus_size_t offset, u_int32_t value);
+
+static void 
+rmi_pci_bus_space_write_multi_stream_1(void *t,
+    bus_space_handle_t handle,
+    bus_size_t offset,
+    const u_int8_t * addr,
+    size_t count);
+static void 
+rmi_pci_bus_space_write_multi_stream_2(void *t,
+    bus_space_handle_t handle,
+    bus_size_t offset,
+    const u_int16_t * addr,
+    size_t count);
+
+static void 
+rmi_pci_bus_space_write_multi_stream_4(void *t,
+    bus_space_handle_t handle,
+    bus_size_t offset,
+    const u_int32_t * addr,
+    size_t count);
+
+#define TODO() printf("XLR memory bus space function '%s' unimplemented\n", __func__)
+
+static struct bus_space local_rmi_pci_bus_space = {
+	/* cookie */
+	(void *)0,
+
+	/* mapping/unmapping */
+	rmi_pci_bus_space_map,
+	rmi_pci_bus_space_unmap,
+	rmi_pci_bus_space_subregion,
+
+	/* allocation/deallocation */
+	NULL,
+	NULL,
+
+	/* barrier */
+	rmi_pci_bus_space_barrier,
+
+	/* read (single) */
+	rmi_pci_bus_space_read_1,
+	rmi_pci_bus_space_read_2,
+	rmi_pci_bus_space_read_4,
+	NULL,
+
+	/* read multiple */
+	rmi_pci_bus_space_read_multi_1,
+	rmi_pci_bus_space_read_multi_2,
+	rmi_pci_bus_space_read_multi_4,
+	NULL,
+
+	/* read region */
+	rmi_pci_bus_space_read_region_1,
+	rmi_pci_bus_space_read_region_2,
+	rmi_pci_bus_space_read_region_4,
+	NULL,
+
+	/* write (single) */
+	rmi_pci_bus_space_write_1,
+	rmi_pci_bus_space_write_2,
+	rmi_pci_bus_space_write_4,
+	NULL,
+
+	/* write multiple */
+	rmi_pci_bus_space_write_multi_1,
+	rmi_pci_bus_space_write_multi_2,
+	rmi_pci_bus_space_write_multi_4,
+	NULL,
+
+	/* write region */
+	NULL,
+	rmi_pci_bus_space_write_region_2,
+	rmi_pci_bus_space_write_region_4,
+	NULL,
+
+	/* set multiple */
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+
+	/* set region */
+	NULL,
+	rmi_pci_bus_space_set_region_2,
+	rmi_pci_bus_space_set_region_4,
+	NULL,
+
+	/* copy */
+	NULL,
+	rmi_pci_bus_space_copy_region_2,
+	NULL,
+	NULL,
+
+	/* read (single) stream */
+	rmi_pci_bus_space_read_stream_1,
+	rmi_pci_bus_space_read_stream_2,
+	rmi_pci_bus_space_read_stream_4,
+	NULL,
+
+	/* read multiple stream */
+	rmi_pci_bus_space_read_multi_stream_1,
+	rmi_pci_bus_space_read_multi_stream_2,
+	rmi_pci_bus_space_read_multi_stream_4,
+	NULL,
+
+	/* read region stream */
+	rmi_pci_bus_space_read_region_1,
+	rmi_pci_bus_space_read_region_2,
+	rmi_pci_bus_space_read_region_4,
+	NULL,
+
+	/* write (single) stream */
+	rmi_pci_bus_space_write_stream_1,
+	rmi_pci_bus_space_write_stream_2,
+	rmi_pci_bus_space_write_stream_4,
+	NULL,
+
+	/* write multiple stream */
+	rmi_pci_bus_space_write_multi_stream_1,
+	rmi_pci_bus_space_write_multi_stream_2,
+	rmi_pci_bus_space_write_multi_stream_4,
+	NULL,
+
+	/* write region stream */
+	NULL,
+	rmi_pci_bus_space_write_region_2,
+	rmi_pci_bus_space_write_region_4,
+	NULL,
+};
+
+/* generic bus_space tag */
+bus_space_tag_t rmi_pci_bus_space = &local_rmi_pci_bus_space;
+
+/*
+ * Map a region of device bus space into CPU virtual address space.
+ */
+static int
+rmi_pci_bus_space_map(void *t __unused, bus_addr_t addr,
+    bus_size_t size __unused, int flags __unused,
+    bus_space_handle_t * bshp)
+{
+	*bshp = addr;
+	return (0);
+}
+
+/*
+ * Unmap a region of device bus space.
+ */
+static void
+rmi_pci_bus_space_unmap(void *t __unused, bus_space_handle_t bsh __unused,
+    bus_size_t size __unused)
+{
+}
+
+/*
+ * Get a new handle for a subregion of an already-mapped area of bus space.
+ */
+
+static int
+rmi_pci_bus_space_subregion(void *t __unused, bus_space_handle_t bsh,
+    bus_size_t offset, bus_size_t size __unused,
+    bus_space_handle_t * nbshp)
+{
+	*nbshp = bsh + offset;
+	return (0);
+}
+
+/*
+ * Read a 1, 2, 4, or 8 byte quantity from bus space
+ * described by tag/handle/offset.
+ */
+
+static u_int8_t
+rmi_pci_bus_space_read_1(void *tag, bus_space_handle_t handle,
+    bus_size_t offset)
+{
+	return (u_int8_t) (*(volatile u_int8_t *)(handle + offset));
+}
+
+static u_int16_t
+rmi_pci_bus_space_read_2(void *tag, bus_space_handle_t handle,
+    bus_size_t offset)
+{
+	return bswap16((u_int16_t) (*(volatile u_int16_t *)(handle + offset)));
+}
+
+static u_int32_t
+rmi_pci_bus_space_read_4(void *tag, bus_space_handle_t handle,
+    bus_size_t offset)
+{
+	return bswap32((*(volatile u_int32_t *)(handle + offset)));
+}
+
+
+/*
+ * Read `count' 1, 2, 4, or 8 byte quantities from bus space
+ * described by tag/handle/offset and copy into buffer provided.
+ */
+static void
+rmi_pci_bus_space_read_multi_1(void *tag, bus_space_handle_t handle,
+    bus_size_t offset, u_int8_t * addr, size_t count)
+{
+	while (count--) {
+		*addr = (*(volatile u_int8_t *)(handle + offset));
+		addr++;
+	}
+}
+
+static void
+rmi_pci_bus_space_read_multi_2(void *tag, bus_space_handle_t handle,
+    bus_size_t offset, u_int16_t * addr, size_t count)
+{
+
+	while (count--) {
+		*addr = *(volatile u_int16_t *)(handle + offset);
+		*addr = bswap16(*addr);
+		addr++;
+	}
+}
+
+static void
+rmi_pci_bus_space_read_multi_4(void *tag, bus_space_handle_t handle,
+    bus_size_t offset, u_int32_t * addr, size_t count)
+{
+
+	while (count--) {
+		*addr = *(volatile u_int32_t *)(handle + offset);
+		*addr = bswap32(*addr);
+		addr++;
+	}
+}
+
+/*
+ * Write the 1, 2, 4, or 8 byte value `value' to bus space
+ * described by tag/handle/offset.
+ */
+
+static void
+rmi_pci_bus_space_write_1(void *tag, bus_space_handle_t handle,
+    bus_size_t offset, u_int8_t value)
+{
+	mips_sync();
+	*(volatile u_int8_t *)(handle + offset) = value;
+}
+
+static void
+rmi_pci_bus_space_write_2(void *tag, bus_space_handle_t handle,
+    bus_size_t offset, u_int16_t value)
+{
+	mips_sync();
+	*(volatile u_int16_t *)(handle + offset) = bswap16(value);
+}
+
+
+static void
+rmi_pci_bus_space_write_4(void *tag, bus_space_handle_t handle,
+    bus_size_t offset, u_int32_t value)
+{
+	mips_sync();
+	*(volatile u_int32_t *)(handle + offset) = bswap32(value);
+}
+
+/*
+ * Write `count' 1, 2, 4, or 8 byte quantities from the buffer
+ * provided to bus space described by tag/handle/offset.
+ */
+
+
+static void
+rmi_pci_bus_space_write_multi_1(void *tag, bus_space_handle_t handle,
+    bus_size_t offset, const u_int8_t * addr, size_t count)
+{
+	mips_sync();
+	while (count--) {
+		(*(volatile u_int8_t *)(handle + offset)) = *addr;
+		addr++;
+	}
+}
+
+static void
+rmi_pci_bus_space_write_multi_2(void *tag, bus_space_handle_t handle,
+    bus_size_t offset, const u_int16_t * addr, size_t count)
+{
+	mips_sync();
+	while (count--) {
+		(*(volatile u_int16_t *)(handle + offset)) = bswap16(*addr);
+		addr++;
+	}
+}
+
+static void
+rmi_pci_bus_space_write_multi_4(void *tag, bus_space_handle_t handle,
+    bus_size_t offset, const u_int32_t * addr, size_t count)
+{
+	mips_sync();
+	while (count--) {
+		(*(volatile u_int32_t *)(handle + offset)) = bswap32(*addr);
+		addr++;
+	}
+}
+
+/*
+ * Write `count' 1, 2, 4, or 8 byte value `val' to bus space described
+ * by tag/handle starting at `offset'.
+ */
+
+static void
+rmi_pci_bus_space_set_region_2(void *t, bus_space_handle_t bsh,
+    bus_size_t offset, u_int16_t value, size_t count)
+{
+	bus_addr_t addr = bsh + offset;
+
+	for (; count != 0; count--, addr += 2)
+		(*(volatile u_int16_t *)(addr)) = value;
+}
+
+static void
+rmi_pci_bus_space_set_region_4(void *t, bus_space_handle_t bsh,
+    bus_size_t offset, u_int32_t value, size_t count)
+{
+	bus_addr_t addr = bsh + offset;
+
+	for (; count != 0; count--, addr += 4)
+		(*(volatile u_int32_t *)(addr)) = value;
+}
+
+
+/*
+ * Copy `count' 1, 2, 4, or 8 byte values from bus space starting
+ * at tag/bsh1/off1 to bus space starting at tag/bsh2/off2.
+ */
+static void
+rmi_pci_bus_space_copy_region_2(void *t, bus_space_handle_t bsh1,
+    bus_size_t off1, bus_space_handle_t bsh2,
+    bus_size_t off2, size_t count)
+{
+	TODO();
+}
+
+/*
+ * Read `count' 1, 2, 4, or 8 byte quantities from bus space
+ * described by tag/handle/offset and copy into buffer provided.
+ */
+
+u_int8_t
+rmi_pci_bus_space_read_stream_1(void *t, bus_space_handle_t handle,
+    bus_size_t offset)
+{
+
+	return *((volatile u_int8_t *)(handle + offset));
+}
+
+
+static u_int16_t
+rmi_pci_bus_space_read_stream_2(void *t, bus_space_handle_t handle,
+    bus_size_t offset)
+{
+	return *(volatile u_int16_t *)(handle + offset);
+}
+
+
+static u_int32_t
+rmi_pci_bus_space_read_stream_4(void *t, bus_space_handle_t handle,
+    bus_size_t offset)
+{
+	return (*(volatile u_int32_t *)(handle + offset));
+}
+
+
+static void
+rmi_pci_bus_space_read_multi_stream_1(void *tag, bus_space_handle_t handle,
+    bus_size_t offset, u_int8_t * addr, size_t count)
+{
+	while (count--) {
+		*addr = (*(volatile u_int8_t *)(handle + offset));
+		addr++;
+	}
+}
+
+static void
+rmi_pci_bus_space_read_multi_stream_2(void *tag, bus_space_handle_t handle,
+    bus_size_t offset, u_int16_t * addr, size_t count)
+{
+	while (count--) {
+		*addr = (*(volatile u_int16_t *)(handle + offset));
+		addr++;
+	}
+}
+
+static void
+rmi_pci_bus_space_read_multi_stream_4(void *tag, bus_space_handle_t handle,
+    bus_size_t offset, u_int32_t * addr, size_t count)
+{
+	while (count--) {
+		*addr = (*(volatile u_int32_t *)(handle + offset));
+		addr++;
+	}
+}
+
+
+
+/*
+ * Read `count' 1, 2, 4, or 8 byte quantities from bus space
+ * described by tag/handle and starting at `offset' and copy into
+ * buffer provided.
+ */
+void
+rmi_pci_bus_space_read_region_1(void *t, bus_space_handle_t bsh,
+    bus_size_t offset, u_int8_t * addr, size_t count)
+{
+	bus_addr_t baddr = bsh + offset;
+
+	while (count--) {
+		*addr++ = (*(volatile u_int8_t *)(baddr));
+		baddr += 1;
+	}
+}
+
+void
+rmi_pci_bus_space_read_region_2(void *t, bus_space_handle_t bsh,
+    bus_size_t offset, u_int16_t * addr, size_t count)
+{
+	bus_addr_t baddr = bsh + offset;
+
+	while (count--) {
+		*addr++ = (*(volatile u_int16_t *)(baddr));
+		baddr += 2;
+	}
+}
+
+void
+rmi_pci_bus_space_read_region_4(void *t, bus_space_handle_t bsh,
+    bus_size_t offset, u_int32_t * addr, size_t count)
+{
+	bus_addr_t baddr = bsh + offset;
+
+	while (count--) {
+		*addr++ = (*(volatile u_int32_t *)(baddr));
+		baddr += 4;
+	}
+}
+
+
+void
+rmi_pci_bus_space_write_stream_1(void *t, bus_space_handle_t handle,
+    bus_size_t offset, u_int8_t value)
+{
+	mips_sync();
+	*(volatile u_int8_t *)(handle + offset) = value;
+}
+
+static void
+rmi_pci_bus_space_write_stream_2(void *t, bus_space_handle_t handle,
+    bus_size_t offset, u_int16_t value)
+{
+	mips_sync();
+	*(volatile u_int16_t *)(handle + offset) = value;
+}
+
+
+static void
+rmi_pci_bus_space_write_stream_4(void *t, bus_space_handle_t handle,
+    bus_size_t offset, u_int32_t value)
+{
+	mips_sync();
+	*(volatile u_int32_t *)(handle + offset) = value;
+}
+
+
+static void
+rmi_pci_bus_space_write_multi_stream_1(void *tag, bus_space_handle_t handle,
+    bus_size_t offset, const u_int8_t * addr, size_t count)
+{
+	mips_sync();
+	while (count--) {
+		(*(volatile u_int8_t *)(handle + offset)) = *addr;
+		addr++;
+	}
+}
+
+static void
+rmi_pci_bus_space_write_multi_stream_2(void *tag, bus_space_handle_t handle,
+    bus_size_t offset, const u_int16_t * addr, size_t count)
+{
+	mips_sync();
+	while (count--) {
+		(*(volatile u_int16_t *)(handle + offset)) = *addr;
+		addr++;
+	}
+}
+
+static void
+rmi_pci_bus_space_write_multi_stream_4(void *tag, bus_space_handle_t handle,
+    bus_size_t offset, const u_int32_t * addr, size_t count)
+{
+	mips_sync();
+	while (count--) {
+		(*(volatile u_int32_t *)(handle + offset)) = *addr;
+		addr++;
+	}
+}
+
+void
+rmi_pci_bus_space_write_region_2(void *t,
+    bus_space_handle_t bsh,
+    bus_size_t offset,
+    const u_int16_t * addr,
+    size_t count)
+{
+	bus_addr_t baddr = (bus_addr_t) bsh + offset;
+
+	while (count--) {
+		(*(volatile u_int16_t *)(baddr)) = *addr;
+		addr++;
+		baddr += 2;
+	}
+}
+
+void
+rmi_pci_bus_space_write_region_4(void *t, bus_space_handle_t bsh,
+    bus_size_t offset, const u_int32_t * addr, size_t count)
+{
+	bus_addr_t baddr = bsh + offset;
+
+	while (count--) {
+		(*(volatile u_int32_t *)(baddr)) = *addr;
+		addr++;
+		baddr += 4;
+	}
+}
+
+static void
+rmi_pci_bus_space_barrier(void *tag __unused, bus_space_handle_t bsh __unused,
+    bus_size_t offset __unused, bus_size_t len __unused, int flags)
+{
+
+}