diff --git a/cpu/leon3/ambapp.c b/cpu/leon3/ambapp.c
new file mode 100644
index 0000000..60ff1a2
--- /dev/null
+++ b/cpu/leon3/ambapp.c
@@ -0,0 +1,339 @@
+/* Gaisler AMBA Plug&Play bus scanning. Functions
+ * ending on _nomem is inteded to be used only during
+ * initialization, only registers are used (no ram).
+ *
+ * (C) Copyright 2007
+ * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <command.h>
+#include <ambapp.h>
+
+static int ambapp_apb_scan(unsigned int vendor,	/* Plug&Play Vendor ID */
+			   unsigned int driver,	/* Plug&Play Device ID */
+			   ambapp_apbdev * dev,	/* Result(s) is placed here */
+			   int index,	/* Index of device to start copying Plug&Play
+					 * info into dev
+					 */
+			   int max_cnt	/* Maximal count that dev can hold, if dev
+					 * is NULL function will stop scanning after
+					 * max_cnt devices are found.
+					 */
+    )
+{
+	int i, cnt = 0;
+	unsigned int apbmst_base;
+	ambapp_ahbdev apbmst;
+	apbctrl_pp_dev *apb;
+
+	if (max_cnt == 0)
+		return 0;
+
+	/* Get AMBA APB Master */
+	if (ambapp_ahbslv_first(VENDOR_GAISLER, GAISLER_APBMST, &apbmst) != 1) {
+		return 0;
+	}
+
+	/* Get APB CTRL Plug&Play info area */
+	apbmst_base = apbmst.address[0] & LEON3_IO_AREA;
+	apb = (apbctrl_pp_dev *) (apbmst_base | LEON3_CONF_AREA);
+
+	for (i = 0; i < LEON3_APB_SLAVES; i++) {
+		if ((amba_vendor(apb->conf) == vendor) &&
+		    (amba_device(apb->conf) == driver) && ((index < 0)
+							   || (index-- == 0))) {
+			/* Convert Plug&Play info into a more readable format */
+			cnt++;
+			if (dev) {
+				dev->irq = amba_irq(apb->conf);
+				dev->ver = amba_ver(apb->conf);
+				dev->address =
+				    (apbmst_base |
+				     (((apb->
+					bar & 0xfff00000) >> 12))) & (((apb->
+									bar &
+									0x0000fff0)
+								       << 4) |
+								      0xfff00000);
+				dev++;
+			}
+			/* found max devices? */
+			if (cnt >= max_cnt)
+				return cnt;
+		}
+		/* Get next Plug&Play entry */
+		apb++;
+	}
+	return cnt;
+}
+
+unsigned int ambapp_apb_next_nomem(register unsigned int vendor,	/* Plug&Play Vendor ID */
+				   register unsigned int driver,	/* Plug&Play Device ID */
+				   register int index)
+{
+	register int i;
+	register ahbctrl_pp_dev *apbmst;
+	register apbctrl_pp_dev *apb;
+	register unsigned int apbmst_base;
+
+	/* APBMST is a AHB Slave */
+	apbmst = ambapp_ahb_next_nomem(VENDOR_GAISLER, GAISLER_APBMST, 1, 0);
+	if (!apbmst)
+		return 0;
+
+	apbmst_base = amba_membar_start(apbmst->bars[0]);
+	if (amba_membar_type(apbmst->bars[0]) == AMBA_TYPE_AHBIO)
+		apbmst_base = AMBA_TYPE_AHBIO_ADDR(apbmst_base);
+	apbmst_base &= LEON3_IO_AREA;
+
+	/* Find the vendor/driver device on the first APB bus */
+	apb = (apbctrl_pp_dev *) (apbmst_base | LEON3_CONF_AREA);
+
+	for (i = 0; i < LEON3_APB_SLAVES; i++) {
+		if ((amba_vendor(apb->conf) == vendor) &&
+		    (amba_device(apb->conf) == driver) && ((index < 0)
+							   || (index-- == 0))) {
+			/* Convert Plug&Play info info a more readable format */
+			return (apbmst_base | (((apb->bar & 0xfff00000) >> 12)))
+			    & (((apb->bar & 0x0000fff0) << 4) | 0xfff00000);
+		}
+		/* Get next Plug&Play entry */
+		apb++;
+	}
+	return 0;
+}
+
+/****************************** APB SLAVES ******************************/
+
+int ambapp_apb_count(unsigned int vendor, unsigned int driver)
+{
+	return ambapp_apb_scan(vendor, driver, NULL, 0, LEON3_APB_SLAVES);
+}
+
+int ambapp_apb_first(unsigned int vendor,
+		     unsigned int driver, ambapp_apbdev * dev)
+{
+	return ambapp_apb_scan(vendor, driver, dev, 0, 1);
+}
+
+int ambapp_apb_next(unsigned int vendor,
+		    unsigned int driver, ambapp_apbdev * dev, int index)
+{
+	return ambapp_apb_scan(vendor, driver, dev, index, 1);
+}
+
+int ambapp_apbs_first(unsigned int vendor,
+		      unsigned int driver, ambapp_apbdev * dev, int max_cnt)
+{
+	return ambapp_apb_scan(vendor, driver, dev, 0, max_cnt);
+}
+
+enum {
+	AHB_SCAN_MASTER = 0,
+	AHB_SCAN_SLAVE = 1
+};
+
+/* Scan AMBA Plug&Play bus for AMBA AHB Masters or AHB Slaves
+ * for a certain matching Vendor and Device ID.
+ *
+ * Return number of devices found.
+ *
+ * Compact edition...
+ */
+static int ambapp_ahb_scan(unsigned int vendor,	/* Plug&Play Vendor ID */
+			   unsigned int driver,	/* Plug&Play Device ID */
+			   ambapp_ahbdev * dev,	/* Result(s) is placed here */
+			   int index,	/* Index of device to start copying Plug&Play
+					 * info into dev
+					 */
+			   int max_cnt,	/* Maximal count that dev can hold, if dev
+					 * is NULL function will stop scanning after
+					 * max_cnt devices are found.
+					 */
+			   int type	/* Selectes what type of devices to scan.
+					 * 0=AHB Masters
+					 * 1=AHB Slaves
+					 */
+    )
+{
+	int i, j, cnt = 0, max_pp_devs;
+	unsigned int addr;
+	ahbctrl_info *info = (ahbctrl_info *) (LEON3_IO_AREA | LEON3_CONF_AREA);
+	ahbctrl_pp_dev *ahb;
+
+	if (max_cnt == 0)
+		return 0;
+
+	if (type == 0) {
+		max_pp_devs = LEON3_AHB_MASTERS;
+		ahb = info->masters;
+	} else {
+		max_pp_devs = LEON3_AHB_SLAVES;
+		ahb = info->slaves;
+	}
+
+	for (i = 0; i < max_pp_devs; i++) {
+		if ((amba_vendor(ahb->conf) == vendor) &&
+		    (amba_device(ahb->conf) == driver) &&
+		    ((index < 0) || (index-- == 0))) {
+			/* Convert Plug&Play info info a more readable format */
+			cnt++;
+			if (dev) {
+				dev->irq = amba_irq(ahb->conf);
+				dev->ver = amba_ver(ahb->conf);
+				dev->userdef[0] = ahb->userdef[0];
+				dev->userdef[1] = ahb->userdef[1];
+				dev->userdef[2] = ahb->userdef[2];
+				for (j = 0; j < 4; j++) {
+					addr = amba_membar_start(ahb->bars[j]);
+					if (amba_membar_type(ahb->bars[j]) ==
+					    AMBA_TYPE_AHBIO)
+						addr =
+						    AMBA_TYPE_AHBIO_ADDR(addr);
+					dev->address[j] = addr;
+				}
+				dev++;
+			}
+			/* found max devices? */
+			if (cnt >= max_cnt)
+				return cnt;
+		}
+		/* Get next Plug&Play entry */
+		ahb++;
+	}
+	return cnt;
+}
+
+unsigned int ambapp_ahb_get_info(ahbctrl_pp_dev * ahb, int info)
+{
+	register unsigned int ret;
+
+	if (!ahb)
+		return 0;
+
+	switch (info) {
+	default:
+		info = 0;
+	case 0:
+	case 1:
+	case 2:
+	case 3:
+		/* Get Address from PnP Info */
+		ret = amba_membar_start(ahb->bars[info]);
+		if (amba_membar_type(ahb->bars[info]) == AMBA_TYPE_AHBIO)
+			ret = AMBA_TYPE_AHBIO_ADDR(ret);
+		return ret;
+	}
+	return 0;
+
+}
+
+ahbctrl_pp_dev *ambapp_ahb_next_nomem(register unsigned int vendor,	/* Plug&Play Vendor ID */
+				      register unsigned int driver,	/* Plug&Play Device ID */
+				      register unsigned int opts,	/* 1=slave, 0=master */
+				      register int index)
+{
+	register ahbctrl_pp_dev *ahb;
+	register ahbctrl_info *info =
+	    (ahbctrl_info *) (LEON3_IO_AREA | LEON3_CONF_AREA);
+	register int i;
+	register int max_pp_devs;
+
+	if (opts == 0) {
+		max_pp_devs = LEON3_AHB_MASTERS;
+		ahb = info->masters;
+	} else {
+		max_pp_devs = LEON3_AHB_SLAVES;
+		ahb = info->slaves;
+	}
+
+	for (i = 0; i < max_pp_devs; i++) {
+		if ((amba_vendor(ahb->conf) == vendor) &&
+		    (amba_device(ahb->conf) == driver) &&
+		    ((index < 0) || (index-- == 0))) {
+			/* Convert Plug&Play info info a more readable format */
+			return ahb;
+		}
+		/* Get next Plug&Play entry */
+		ahb++;
+	}
+	return 0;
+}
+
+/****************************** AHB MASTERS ******************************/
+int ambapp_ahbmst_count(unsigned int vendor, unsigned int driver)
+{
+	/* Get number of devices of this vendor&device ID */
+	return ambapp_ahb_scan(vendor, driver, NULL, 0, LEON3_AHB_MASTERS,
+			       AHB_SCAN_MASTER);
+}
+
+int ambapp_ahbmst_first(unsigned int vendor, unsigned int driver,
+			ambapp_ahbdev * dev)
+{
+	/* find first device of this */
+	return ambapp_ahb_scan(vendor, driver, dev, 0, 1, AHB_SCAN_MASTER);
+}
+
+int ambapp_ahbmst_next(unsigned int vendor,
+		       unsigned int driver, ambapp_ahbdev * dev, int index)
+{
+	/* find first device of this */
+	return ambapp_ahb_scan(vendor, driver, dev, index, 1, AHB_SCAN_MASTER);
+}
+
+int ambapp_ahbmsts_first(unsigned int vendor,
+			 unsigned int driver, ambapp_ahbdev * dev, int max_cnt)
+{
+	/* find first device of this */
+	return ambapp_ahb_scan(vendor, driver, dev, 0, max_cnt,
+			       AHB_SCAN_MASTER);
+}
+
+/****************************** AHB SLAVES ******************************/
+int ambapp_ahbslv_count(unsigned int vendor, unsigned int driver)
+{
+	/* Get number of devices of this vendor&device ID */
+	return ambapp_ahb_scan(vendor, driver, NULL, 0, LEON3_AHB_SLAVES,
+			       AHB_SCAN_SLAVE);
+}
+
+int ambapp_ahbslv_first(unsigned int vendor, unsigned int driver,
+			ambapp_ahbdev * dev)
+{
+	/* find first device of this */
+	return ambapp_ahb_scan(vendor, driver, dev, 0, 1, AHB_SCAN_SLAVE);
+}
+
+int ambapp_ahbslv_next(unsigned int vendor,
+		       unsigned int driver, ambapp_ahbdev * dev, int index)
+{
+	/* find first device of this */
+	return ambapp_ahb_scan(vendor, driver, dev, index, 1, AHB_SCAN_SLAVE);
+}
+
+int ambapp_ahbslvs_first(unsigned int vendor,
+			 unsigned int driver, ambapp_ahbdev * dev, int max_cnt)
+{
+	/* find first device of this */
+	return ambapp_ahb_scan(vendor, driver, dev, 0, max_cnt, AHB_SCAN_SLAVE);
+}