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diff --git a/sys/arm64/ofw/ofw_initrd.c b/sys/arm64/ofw/ofw_initrd.c
new file mode 100644
--- /dev/null
+++ b/sys/arm64/ofw/ofw_initrd.c
@@ -0,0 +1,98 @@
+/*-
+ * Copyright (C) 2018 Breno Leitao
+ *
+ * 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 ``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 TOOLS GMBH 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/param.h>
+#include <sys/kernel.h>
+#include <sys/systm.h>
+#include <sys/module.h>
+#include <sys/types.h>
+#include <sys/proc.h>
+
+#include <vm/vm.h>
+#include <vm/pmap.h>
+
+#include <machine/bus.h>
+#include <machine/elf.h>
+#include <machine/param.h>
+#include <machine/vmparam.h>
+
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include "opt_md.h"
+
+extern u_char *mfs_root;
+extern int mfs_root_size;
+
+static void ofw_initrd_probe_and_attach(void *junk);
+
+SYSINIT(ofw_initrd_probe_and_attach, SI_SUB_KMEM, SI_ORDER_ANY,
+ ofw_initrd_probe_and_attach, NULL);
+
+static void
+ofw_initrd_probe_and_attach(void *junk)
+{
+ phandle_t chosen;
+ vm_paddr_t start, end;
+ pcell_t cell[2];
+ ssize_t size;
+ u_char *taste;
+
+ chosen = OF_finddevice("/chosen");
+ if (chosen <= 0)
+ return;
+
+ if (!OF_hasprop(chosen, "linux,initrd-start") ||
+ !OF_hasprop(chosen, "linux,initrd-end"))
+ return;
+
+ size = OF_getencprop(chosen, "linux,initrd-start", cell, sizeof(cell));
+ if (size == 4)
+ start = cell[0];
+ else if (size == 8)
+ start = (uint64_t)cell[0] << 32 | cell[1];
+ else {
+ printf("ofw_initrd: Wrong linux,initrd-start size\n");
+ return;
+ }
+
+ size = OF_getencprop(chosen, "linux,initrd-end", cell, sizeof(cell));
+ if (size == 4)
+ end = cell[0];
+ else if (size == 8)
+ end = (uint64_t)cell[0] << 32 | cell[1];
+ else{
+ printf("ofw_initrd: Wrong linux,initrd-end size\n");
+ return;
+ }
+
+ if (end - start > 0) {
+ taste = (u_char *) PHYS_TO_DMAP(start);
+ mfs_root = taste;
+ mfs_root_size = end - start;
+ printf("ofw_initrd: initrd loaded at 0x%08lx-0x%08lx\n",
+ start, end);
+ }
+}
diff --git a/sys/conf/files.arm64 b/sys/conf/files.arm64
--- a/sys/conf/files.arm64
+++ b/sys/conf/files.arm64
@@ -338,6 +338,7 @@
dev/ofw/ofw_cpu.c optional fdt
dev/ofw/ofw_pci.c optional fdt pci
dev/ofw/ofw_pcib.c optional fdt pci
+arm64/ofw/ofw_initrd.c optional fdt md_root_mem
dev/pci/controller/pci_n1sdp.c optional pci_n1sdp acpi
dev/pci/pci_host_generic.c optional pci

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