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 +1,132 @@
+/*-
+ * 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.
+ */
+
+/*
+ * The pupose of this is to support U-boot managed FreeBSD bootup by using
+ * only binary images, without any device with a partition table.
+ *
+ * This functionality has been ported from sys/powerpc/ofw/ofw_initrd.c
+ *
+ * Please find an example U-boot usage below:
+ *
+ *   setenv kernel_comp_addr_r 0x3000000
+ *   setenv kernel_comp_size 0x04000000
+ *   setenv fdt_addr_r 0x2000000
+ *   dhcp
+ *   tftp $fdt_addr_r rk3328-rock64.dtb
+ *   tftp $kernel_addr_r kernel.bin.gz
+ *   setenv ramdisk_addr_r 0x07000000
+ *   tftp $ramdisk_addr_r mfsroot
+ *   fdt addr $fdt_addr_r
+ *   fdt chosen $ramdisk_addr_r $filesize
+ *   booti $kernel_addr_r - $fdt_addr_r
+ *
+ * The "fdt chosen" command above embeds ramdisk setting into the actual fdt tree.
+ *
+ * The "mfsroot" image is an uncompressed UFS disk image.
+ *
+ * FreeBSD boot log should be like the following:
+ *
+ *   md0: Embedded image 11534336 bytes at 0xffffa0007c42b000
+ *
+ *   mountroot> ?
+ *
+ *   List of GEOM managed disk devices:
+ *     ufsid/6416031dd9f2971da ufsid/6416031dd9f2971d md0a md0
+ */
+
+#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