

 Makefile                           |    3 +
 README                             |    1 +
 cpu/leon3/Makefile                 |   54 ++
 cpu/leon3/ambapp.c                 |  339 ++++++++++
 cpu/leon3/config.mk                |   26 +
 cpu/leon3/cpu.c                    |   67 ++
 cpu/leon3/cpu_init.c               |  254 +++++++
 cpu/leon3/interrupts.c             |  219 ++++++
 cpu/leon3/prom.c                   | 1078 +++++++++++++++++++++++++++++
 cpu/leon3/serial.c                 |  139 ++++
 cpu/leon3/start.S                  |  616 +++++++++++++++++
 cpu/leon3/usb_uhci.c               | 1313 ++++++++++++++++++++++++++++++++++++
 cpu/leon3/usb_uhci.h               |  184 +++++
 include/ambapp.h                   |  380 +++++++++++
 include/asm-sparc/arch-leon3/asi.h |   36 +
 include/asm-sparc/leon.h           |   38 +
 include/asm-sparc/leon3.h          |   37 +
 include/asm-sparc/processor.h      |    9 +-
 18 files changed, 4792 insertions(+), 1 deletions(-)


diff --git a/Makefile b/Makefile
index a1291ed..64b27b6 100644
--- a/Makefile
+++ b/Makefile
@@ -2858,6 +2858,9 @@ ms7722se_config :	unconfig
 #========================================================================
 # SPARC
 #========================================================================
+#########################################################################
+## LEON3
+#########################################################################
 
 #########################################################################
 #########################################################################
diff --git a/README b/README
index 18db3e1..18cd73d 100644
--- a/README
+++ b/README
@@ -153,6 +153,7 @@ Directory Hierarchy:
   - at32ap	Files specific to Atmel AVR32 AP CPUs
   - i386	Files specific to i386 CPUs
   - ixp		Files specific to Intel XScale IXP CPUs
+  - leon3	Files specific to Gaisler LEON3 SPARC CPU
   - mcf52x2	Files specific to Freescale ColdFire MCF52x2 CPUs
   - mcf5227x	Files specific to Freescale ColdFire MCF5227x CPUs
   - mcf532x	Files specific to Freescale ColdFire MCF5329 CPUs
diff --git a/cpu/leon3/Makefile b/cpu/leon3/Makefile
new file mode 100644
index 0000000..182543d
--- /dev/null
+++ b/cpu/leon3/Makefile
@@ -0,0 +1,54 @@
+#
+# (C) Copyright 2003-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# 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 $(TOPDIR)/config.mk
+
+LIB	= $(obj)lib$(CPU).a
+
+START	= start.o
+SOBJS	=
+COBJS	= cpu_init.o serial.o cpu.o ambapp.o interrupts.o prom.o usb_uhci.o
+
+SRCS	:= $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
+START	:= $(addprefix $(obj),$(START))
+
+all:	$(obj).depend $(START) $(LIB)
+
+$(LIB):	$(OBJS)
+	$(AR) $(ARFLAGS) $@ $(OBJS)
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+$(START): $(START:.o=.S)
+	$(CC) -D__ASSEMBLY__ $(DBGFLAGS) $(OPTFLAGS) -D__KERNEL__ -DTEXT_BASE=$(TEXT_BASE) \
+	-I$(TOPDIR)/include -fno-builtin -ffreestanding -nostdinc -isystem $(gccincdir) -pipe \
+	$(PLATFORM_CPPFLAGS) -Wall -Wstrict-prototypes \
+	-I$(TOPDIR)/board -c -o $(START) $(START:.o=.S)
+
+sinclude $(obj).depend
+
+#########################################################################
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);
+}
diff --git a/cpu/leon3/config.mk b/cpu/leon3/config.mk
new file mode 100644
index 0000000..30b224a
--- /dev/null
+++ b/cpu/leon3/config.mk
@@ -0,0 +1,26 @@
+#
+# (C) Copyright 2003
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# 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
+#
+
+PLATFORM_RELFLAGS += -fPIC
+
+PLATFORM_CPPFLAGS += -DCONFIG_LEON
diff --git a/cpu/leon3/cpu.c b/cpu/leon3/cpu.c
new file mode 100644
index 0000000..306a210
--- /dev/null
+++ b/cpu/leon3/cpu.c
@@ -0,0 +1,67 @@
+/* CPU specific code for the LEON3 CPU
+ *
+ * (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 <watchdog.h>
+#include <command.h>
+
+#include <asm/io.h>
+#include <asm/processor.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+extern void _reset_reloc(void);
+
+int checkcpu(void)
+{
+	/* check LEON version here */
+	printf("CPU: LEON3\n");
+	return 0;
+}
+
+/* ------------------------------------------------------------------------- */
+
+void cpu_reset(void)
+{
+	/* Interrupts off */
+	disable_interrupts();
+
+	/* jump to restart in flash */
+	_reset_reloc();
+}
+
+int do_reset(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+{
+	cpu_reset();
+
+	return 1;
+
+}
+
+u64 flash_read64(void *addr)
+{
+	return __raw_readq(addr);
+}
+
+/* ------------------------------------------------------------------------- */
diff --git a/cpu/leon3/cpu_init.c b/cpu/leon3/cpu_init.c
new file mode 100644
index 0000000..4fe7d4b
--- /dev/null
+++ b/cpu/leon3/cpu_init.c
@@ -0,0 +1,254 @@
+/* Initializes CPU and basic hardware such as memory
+ * controllers, IRQ controller and system timer 0.
+ *
+ * (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 <asm/asi.h>
+#include <asm/leon.h>
+#include <ambapp.h>
+
+#include <config.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* reset CPU (jump to 0, without reset) */
+void start(void);
+
+/* find & initialize the memory controller */
+int init_memory_ctrl(void);
+
+ambapp_dev_irqmp *irqmp = NULL;
+ambapp_dev_mctrl memctrl;
+ambapp_dev_gptimer *gptimer = NULL;
+unsigned int gptimer_irq = 0;
+int leon3_snooping_avail = 0;
+
+struct {
+	gd_t gd_area;
+	bd_t bd;
+} global_data;
+
+/*
+ * Breath some life into the CPU...
+ *
+ * Set up the memory map,
+ * initialize a bunch of registers.
+ *
+ * Run from FLASH/PROM:
+ *  - until memory controller is set up, only registers avaiable
+ *  - no global variables available for writing
+ *  - constants avaiable
+ */
+
+void cpu_init_f(void)
+{
+	/* these varaiable must not be initialized */
+	ambapp_dev_irqmp *irqmp;
+	ambapp_apbdev apbdev;
+	register unsigned int apbmst;
+
+	/* find AMBA APB Master */
+	apbmst = (unsigned int)
+	    ambapp_ahb_next_nomem(VENDOR_GAISLER, GAISLER_APBMST, 1, 0);
+	if (!apbmst) {
+		/*
+		 * no AHB/APB bridge, something is wrong
+		 * ==> jump to start (or hang)
+		 */
+		while (1) ;
+	}
+	/* Init memory controller */
+	if (init_memory_ctrl()) {
+		while (1) ;
+	}
+
+	/****************************************************
+	 * From here we can use the main memory and the stack.
+	 */
+
+	/* Find AMBA APB IRQMP Controller */
+	if (ambapp_apb_first(VENDOR_GAISLER, GAISLER_IRQMP, &apbdev) != 1) {
+		/* no IRQ controller, something is wrong
+		 * ==> jump to start (or hang)
+		 */
+		while (1) ;
+	}
+	irqmp = (ambapp_dev_irqmp *) apbdev.address;
+
+	/* initialize the IRQMP */
+	irqmp->ilevel = 0xf;	/* all IRQ off */
+	irqmp->iforce = 0;
+	irqmp->ipend = 0;
+	irqmp->iclear = 0xfffe;	/* clear all old pending interrupts */
+	irqmp->cpu_mask[0] = 0;	/* mask all IRQs on CPU 0 */
+	irqmp->cpu_force[0] = 0;	/* no force IRQ on CPU 0 */
+
+	/* cache */
+}
+
+void cpu_init_f2(void)
+{
+
+}
+
+/*
+ * initialize higher level parts of CPU like time base and timers
+ */
+int cpu_init_r(void)
+{
+	ambapp_apbdev apbdev;
+
+	/*
+	 * Find AMBA APB IRQMP Controller,
+	 * When we come so far we know there is a IRQMP available
+	 */
+	ambapp_apb_first(VENDOR_GAISLER, GAISLER_IRQMP, &apbdev);
+	irqmp = (ambapp_dev_irqmp *) apbdev.address;
+
+	/* timer */
+	if (ambapp_apb_first(VENDOR_GAISLER, GAISLER_GPTIMER, &apbdev) != 1) {
+		printf("cpu_init_r: gptimer not found!\n");
+		return 1;
+	}
+	gptimer = (ambapp_dev_gptimer *) apbdev.address;
+	gptimer_irq = apbdev.irq;
+
+	/* initialize prescaler common to all timers to 1MHz */
+	gptimer->scalar = gptimer->scalar_reload =
+	    (((CONFIG_SYS_CLK_FREQ / 1000) + 500) / 1000) - 1;
+
+	return (0);
+}
+
+/* find & setup memory controller */
+int init_memory_ctrl()
+{
+	register ambapp_dev_mctrl *mctrl;
+	register ambapp_dev_sdctrl *sdctrl;
+	register ambapp_dev_ddrspa *ddrspa;
+	register ambapp_dev_ddr2spa *ddr2spa;
+	register ahbctrl_pp_dev *ahb;
+	register unsigned int base;
+	register int not_found_mctrl = -1;
+
+	/* find ESA Memory controller */
+	base = ambapp_apb_next_nomem(VENDOR_ESA, ESA_MCTRL, 0);
+	if (base) {
+		mctrl = (ambapp_dev_mctrl *) base;
+
+		/* config MCTRL memory controller */
+		mctrl->mcfg1 = CFG_GRLIB_MEMCFG1 | (mctrl->mcfg1 & 0x300);
+		mctrl->mcfg2 = CFG_GRLIB_MEMCFG2;
+		mctrl->mcfg3 = CFG_GRLIB_MEMCFG3;
+		not_found_mctrl = 0;
+	}
+
+	/* find Gaisler Fault Tolerant Memory controller */
+	base = ambapp_apb_next_nomem(VENDOR_GAISLER, GAISLER_FTMCTRL, 0);
+	if (base) {
+		mctrl = (ambapp_dev_mctrl *) base;
+
+		/* config MCTRL memory controller */
+		mctrl->mcfg1 = CFG_GRLIB_FT_MEMCFG1 | (mctrl->mcfg1 & 0x300);
+		mctrl->mcfg2 = CFG_GRLIB_FT_MEMCFG2;
+		mctrl->mcfg3 = CFG_GRLIB_FT_MEMCFG3;
+		not_found_mctrl = 0;
+	}
+
+	/* find SDRAM controller */
+	base = ambapp_apb_next_nomem(VENDOR_GAISLER, GAISLER_SDCTRL, 0);
+	if (base) {
+		sdctrl = (ambapp_dev_sdctrl *) base;
+
+		/* config memory controller */
+		sdctrl->sdcfg = CFG_GRLIB_SDRAM;
+		not_found_mctrl = 0;
+	}
+
+	ahb = ambapp_ahb_next_nomem(VENDOR_GAISLER, GAISLER_DDR2SPA, 1, 0);
+	if (ahb) {
+		ddr2spa = (ambapp_dev_ddr2spa *) ambapp_ahb_get_info(ahb, 1);
+
+		/* Config DDR2 memory controller */
+		ddr2spa->cfg1 = CFG_GRLIB_DDR2_CFG1;
+		ddr2spa->cfg3 = CFG_GRLIB_DDR2_CFG3;
+		not_found_mctrl = 0;
+	}
+
+	ahb = ambapp_ahb_next_nomem(VENDOR_GAISLER, GAISLER_DDRSPA, 1, 0);
+	if (ahb) {
+		ddrspa = (ambapp_dev_ddrspa *) ambapp_ahb_get_info(ahb, 1);
+
+		/* Config DDR memory controller */
+		ddrspa->ctrl = CFG_GRLIB_DDR_CFG;
+		not_found_mctrl = 0;
+	}
+
+	/* failed to find any memory controller */
+	return not_found_mctrl;
+}
+
+/* Uses Timer 0 to get accurate
+ * pauses. Max 2 raised to 32 ticks
+ *
+ */
+void cpu_wait_ticks(unsigned long ticks)
+{
+	unsigned long start = get_timer(0);
+	while (get_timer(start) < ticks) ;
+}
+
+/* initiate and setup timer0 interrupt to 1MHz
+ * Return irq number for timer int or a negative number for
+ * dealing with self
+ */
+int timer_interrupt_init_cpu(void)
+{
+	/* 1ms ticks */
+	gptimer->e[0].val = 0;
+	gptimer->e[0].rld = 999;	/* (((1000000 / 100) - 1)) */
+	gptimer->e[0].ctrl =
+	    (LEON3_GPTIMER_EN |
+	     LEON3_GPTIMER_RL | LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN);
+
+	return gptimer_irq;
+}
+
+/*
+ * This function is intended for SHORT delays only.
+ */
+unsigned long cpu_usec2ticks(unsigned long usec)
+{
+	/* timer set to 1kHz ==> 1 clk tick = 1 msec */
+	if (usec < 1000)
+		return 1;
+	return (usec / 1000);
+}
+
+unsigned long cpu_ticks2usec(unsigned long ticks)
+{
+	/* 1tick = 1usec */
+	return ticks * 1000;
+}
diff --git a/cpu/leon3/interrupts.c b/cpu/leon3/interrupts.c
new file mode 100644
index 0000000..2692632
--- /dev/null
+++ b/cpu/leon3/interrupts.c
@@ -0,0 +1,219 @@
+/*
+ * (C) Copyright 2007
+ * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com
+ *
+ * (C) Copyright 2006
+ * Detlev Zundel, DENX Software Engineering, dzu@denx.de
+ *
+ * (C) Copyright -2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2001
+ * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
+ *
+ * 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 <asm/stack.h>
+#include <common.h>
+#include <asm/io.h>
+#include <asm/processor.h>
+#include <command.h>
+#include <asm/irq.h>
+
+#include <asm/leon.h>
+#include <ambapp.h>
+
+/* 15 normal irqs and a non maskable interrupt */
+#define NR_IRQS 15
+
+struct irq_action {
+	interrupt_handler_t *handler;
+	void *arg;
+	unsigned int count;
+};
+
+extern ambapp_dev_irqmp *irqmp;
+extern ambapp_dev_gptimer *gptimer;
+
+static struct irq_action irq_handlers[NR_IRQS] = { {0}, };
+static int spurious_irq_cnt = 0;
+static int spurious_irq = 0;
+
+static inline unsigned int irqmp_get_irqmask(unsigned int irq)
+{
+	if ((irq < 0) || (irq >= NR_IRQS)) {
+		return 0;
+	} else {
+		return (1 << irq);
+	}
+
+}
+
+static void leon3_ic_disable(unsigned int irq)
+{
+	unsigned int mask, pil;
+	if (!irqmp)
+		return;
+
+	pil = intLock();
+
+	/* get mask of interrupt */
+	mask = irqmp_get_irqmask(irq);
+
+	/* set int level */
+	irqmp->cpu_mask[0] = SPARC_NOCACHE_READ(&irqmp->cpu_mask[0]) & (~mask);
+
+	intUnlock(pil);
+}
+
+static void leon3_ic_enable(unsigned int irq)
+{
+	unsigned int mask, pil;
+	if (!irqmp)
+		return;
+
+	pil = intLock();
+
+	/* get mask of interrupt */
+	mask = irqmp_get_irqmask(irq);
+
+	/* set int level */
+	irqmp->cpu_mask[0] = SPARC_NOCACHE_READ(&irqmp->cpu_mask[0]) | mask;
+
+	intUnlock(pil);
+
+}
+
+void handler_irq(int irq, struct pt_regs *regs)
+{
+	if (irq_handlers[irq].handler) {
+		if (((unsigned int)irq_handlers[irq].handler > CFG_RAM_END) ||
+		    ((unsigned int)irq_handlers[irq].handler < CFG_RAM_BASE)
+		    ) {
+			printf("handler_irq: bad handler: %x, irq number %d\n",
+			       (unsigned int)irq_handlers[irq].handler, irq);
+			return;
+		}
+		irq_handlers[irq].handler(irq_handlers[irq].arg);
+		irq_handlers[irq].count++;
+	} else {
+		spurious_irq_cnt++;
+		spurious_irq = irq;
+	}
+}
+
+void leon3_force_int(int irq)
+{
+	if (!irqmp || (irq >= NR_IRQS) || (irq < 0))
+		return;
+	printf("Forcing interrupt %d\n", irq);
+
+	irqmp->iforce = SPARC_NOCACHE_READ(&irqmp->iforce) | (1 << irq);
+}
+
+/****************************************************************************/
+
+int interrupt_init_cpu(void)
+{
+
+	return (0);
+}
+
+/****************************************************************************/
+
+/* Handle Timer 0 IRQ */
+void timer_interrupt_cpu(void *arg)
+{
+	gptimer->e[0].ctrl = (LEON3_GPTIMER_EN |
+			      LEON3_GPTIMER_RL |
+			      LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN);
+	/* nothing to do here */
+	return;
+}
+
+/****************************************************************************/
+
+/*
+ * Install and free a interrupt handler.
+ */
+
+void irq_install_handler(int irq, interrupt_handler_t * handler, void *arg)
+{
+	if (irq < 0 || irq >= NR_IRQS) {
+		printf("irq_install_handler: bad irq number %d\n", irq);
+		return;
+	}
+
+	if (irq_handlers[irq].handler != NULL)
+		printf("irq_install_handler: 0x%08lx replacing 0x%08lx\n",
+		       (ulong) handler, (ulong) irq_handlers[irq].handler);
+
+	if (((unsigned int)handler > CFG_RAM_END) ||
+	    ((unsigned int)handler < CFG_RAM_BASE)
+	    ) {
+		printf("irq_install_handler: bad handler: %x, irq number %d\n",
+		       (unsigned int)handler, irq);
+		return;
+	}
+	irq_handlers[irq].handler = handler;
+	irq_handlers[irq].arg = arg;
+
+	/* enable irq on IRQMP hardware */
+	leon3_ic_enable(irq);
+
+}
+
+void irq_free_handler(int irq)
+{
+	if (irq < 0 || irq >= NR_IRQS) {
+		printf("irq_free_handler: bad irq number %d\n", irq);
+		return;
+	}
+
+	/* disable irq on IRQMP hardware */
+	leon3_ic_disable(irq);
+
+	irq_handlers[irq].handler = NULL;
+	irq_handlers[irq].arg = NULL;
+}
+
+/****************************************************************************/
+
+#if defined(CONFIG_CMD_IRQ)
+void do_irqinfo(cmd_tbl_t * cmdtp, bd_t * bd, int flag, int argc, char *argv[])
+{
+	int irq;
+	unsigned int pil = get_pil();
+	printf("PIL level: %u\n\r", pil);
+	printf("Spurious IRQ: %u, last unknown IRQ: %d\n",
+	       spurious_irq_cnt, spurious_irq);
+
+	puts("\nInterrupt-Information:\n" "Nr  Routine   Arg       Count\n");
+
+	for (irq = 0; irq < NR_IRQS; irq++) {
+		if (irq_handlers[irq].handler != NULL) {
+			printf("%02d  %08lx  %08lx  %ld\n", irq,
+			       (unsigned int)irq_handlers[irq].handler,
+			       (unsigned int)irq_handlers[irq].arg,
+			       irq_handlers[irq].count);
+		}
+	}
+}
+#endif
diff --git a/cpu/leon3/prom.c b/cpu/leon3/prom.c
new file mode 100644
index 0000000..9fa2d04
--- /dev/null
+++ b/cpu/leon3/prom.c
@@ -0,0 +1,1078 @@
+/* prom.c - emulates a sparc v0 PROM for the linux kernel.
+ *
+ * Copyright (C) 2003 Konrad Eisele <eiselekd@web.de>
+ * Copyright (C) 2004 Stefan Holst <mail@s-holst.de>
+ * Copyright (C) 2007 Daniel Hellstrom <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 <asm/prom.h>
+#include <asm/machines.h>
+#include <asm/srmmu.h>
+#include <asm/processor.h>
+#include <asm/irq.h>
+#include <asm/leon.h>
+#include <ambapp.h>
+
+#include <config.h>
+/*
+#define PRINT_ROM_VEC
+*/
+extern struct linux_romvec *kernel_arg_promvec;
+extern ambapp_dev_apbuart *leon3_apbuart;
+
+#define PROM_PGT __attribute__ ((__section__ (".prom.pgt")))
+#define PROM_TEXT __attribute__ ((__section__ (".prom.text")))
+#define PROM_DATA __attribute__ ((__section__ (".prom.data")))
+
+ambapp_dev_gptimer *gptimer;
+
+/* for __va */
+extern int __prom_start;
+#define PAGE_OFFSET 0xf0000000
+#define phys_base CFG_SDRAM_BASE
+#define PROM_OFFS 8192
+#define PROM_SIZE_MASK (PROM_OFFS-1)
+#define __va(x) ( \
+	(void *)( ((unsigned long)(x))-PROM_OFFS+ \
+	(CFG_PROM_OFFSET-phys_base)+PAGE_OFFSET-TEXT_BASE ) \
+	)
+#define __phy(x) ((void *)(((unsigned long)(x))-PROM_OFFS+CFG_PROM_OFFSET-TEXT_BASE))
+
+struct property {
+	char *name;
+	char *value;
+	int length;
+};
+
+struct node {
+	int level;
+	struct property *properties;
+};
+
+static void leon_reboot(char *bcommand);
+static void leon_halt(void);
+static int leon_nbputchar(int c);
+static int leon_nbgetchar(void);
+
+static int no_nextnode(int node);
+static int no_child(int node);
+static int no_proplen(int node, char *name);
+static int no_getprop(int node, char *name, char *value);
+static int no_setprop(int node, char *name, char *value, int len);
+static char *no_nextprop(int node, char *name);
+
+static struct property PROM_TEXT *find_property(int node, char *name);
+static int PROM_TEXT leon_strcmp(const char *s1, const char *s2);
+static void *PROM_TEXT leon_memcpy(void *dest, const void *src, size_t n);
+static void PROM_TEXT leon_reboot_physical(char *bcommand);
+
+void __inline__ leon_flush_cache_all(void)
+{
+	__asm__ __volatile__(" flush ");
+      __asm__ __volatile__("sta %%g0, [%%g0] %0\n\t"::"i"(ASI_DFLUSH):"memory");
+}
+
+void __inline__ leon_flush_tlb_all(void)
+{
+	leon_flush_cache_all();
+	__asm__ __volatile__("sta %%g0, [%0] %1\n\t"::"r"(0x400),
+			     "i"(ASI_MMUFLUSH):"memory");
+}
+
+typedef struct {
+	unsigned int ctx_table[256];
+	unsigned int pgd_table[256];
+} sparc_srmmu_setup;
+
+sparc_srmmu_setup srmmu_tables PROM_PGT = {
+	{0},
+	{0x1e,
+	 0x10001e,
+	 0x20001e,
+	 0x30001e,
+	 0x40001e,
+	 0x50001e,
+	 0x60001e,
+	 0x70001e,
+	 0x80001e,
+	 0x90001e,
+	 0xa0001e,
+	 0xb0001e,
+	 0xc0001e,
+	 0xd0001e,
+	 0xe0001e,
+	 0xf0001e,
+	 0x100001e,
+	 0x110001e,
+	 0x120001e,
+	 0x130001e,
+	 0x140001e,
+	 0x150001e,
+	 0x160001e,
+	 0x170001e,
+	 0x180001e,
+	 0x190001e,
+	 0x1a0001e,
+	 0x1b0001e,
+	 0x1c0001e,
+	 0x1d0001e,
+	 0x1e0001e,
+	 0x1f0001e,
+	 0x200001e,
+	 0x210001e,
+	 0x220001e,
+	 0x230001e,
+	 0x240001e,
+	 0x250001e,
+	 0x260001e,
+	 0x270001e,
+	 0x280001e,
+	 0x290001e,
+	 0x2a0001e,
+	 0x2b0001e,
+	 0x2c0001e,
+	 0x2d0001e,
+	 0x2e0001e,
+	 0x2f0001e,
+	 0x300001e,
+	 0x310001e,
+	 0x320001e,
+	 0x330001e,
+	 0x340001e,
+	 0x350001e,
+	 0x360001e,
+	 0x370001e,
+	 0x380001e,
+	 0x390001e,
+	 0x3a0001e,
+	 0x3b0001e,
+	 0x3c0001e,
+	 0x3d0001e,
+	 0x3e0001e,
+	 0x3f0001e,
+	 0x400001e,
+	 0x410001e,
+	 0x420001e,
+	 0x430001e,
+	 0x440001e,
+	 0x450001e,
+	 0x460001e,
+	 0x470001e,
+	 0x480001e,
+	 0x490001e,
+	 0x4a0001e,
+	 0x4b0001e,
+	 0x4c0001e,
+	 0x4d0001e,
+	 0x4e0001e,
+	 0x4f0001e,
+	 0x500001e,
+	 0x510001e,
+	 0x520001e,
+	 0x530001e,
+	 0x540001e,
+	 0x550001e,
+	 0x560001e,
+	 0x570001e,
+	 0x580001e,
+	 0x590001e,
+	 0x5a0001e,
+	 0x5b0001e,
+	 0x5c0001e,
+	 0x5d0001e,
+	 0x5e0001e,
+	 0x5f0001e,
+	 0x600001e,
+	 0x610001e,
+	 0x620001e,
+	 0x630001e,
+	 0x640001e,
+	 0x650001e,
+	 0x660001e,
+	 0x670001e,
+	 0x680001e,
+	 0x690001e,
+	 0x6a0001e,
+	 0x6b0001e,
+	 0x6c0001e,
+	 0x6d0001e,
+	 0x6e0001e,
+	 0x6f0001e,
+	 0x700001e,
+	 0x710001e,
+	 0x720001e,
+	 0x730001e,
+	 0x740001e,
+	 0x750001e,
+	 0x760001e,
+	 0x770001e,
+	 0x780001e,
+	 0x790001e,
+	 0x7a0001e,
+	 0x7b0001e,
+	 0x7c0001e,
+	 0x7d0001e,
+	 0x7e0001e,
+	 0x7f0001e,
+	 0x800001e,
+	 0x810001e,
+	 0x820001e,
+	 0x830001e,
+	 0x840001e,
+	 0x850001e,
+	 0x860001e,
+	 0x870001e,
+	 0x880001e,
+	 0x890001e,
+	 0x8a0001e,
+	 0x8b0001e,
+	 0x8c0001e,
+	 0x8d0001e,
+	 0x8e0001e,
+	 0x8f0001e,
+	 0x900001e,
+	 0x910001e,
+	 0x920001e,
+	 0x930001e,
+	 0x940001e,
+	 0x950001e,
+	 0x960001e,
+	 0x970001e,
+	 0x980001e,
+	 0x990001e,
+	 0x9a0001e,
+	 0x9b0001e,
+	 0x9c0001e,
+	 0x9d0001e,
+	 0x9e0001e,
+	 0x9f0001e,
+	 0xa00001e,
+	 0xa10001e,
+	 0xa20001e,
+	 0xa30001e,
+	 0xa40001e,
+	 0xa50001e,
+	 0xa60001e,
+	 0xa70001e,
+	 0xa80001e,
+	 0xa90001e,
+	 0xaa0001e,
+	 0xab0001e,
+	 0xac0001e,
+	 0xad0001e,
+	 0xae0001e,
+	 0xaf0001e,
+	 0xb00001e,
+	 0xb10001e,
+	 0xb20001e,
+	 0xb30001e,
+	 0xb40001e,
+	 0xb50001e,
+	 0xb60001e,
+	 0xb70001e,
+	 0xb80001e,
+	 0xb90001e,
+	 0xba0001e,
+	 0xbb0001e,
+	 0xbc0001e,
+	 0xbd0001e,
+	 0xbe0001e,
+	 0xbf0001e,
+	 0xc00001e,
+	 0xc10001e,
+	 0xc20001e,
+	 0xc30001e,
+	 0xc40001e,
+	 0xc50001e,
+	 0xc60001e,
+	 0xc70001e,
+	 0xc80001e,
+	 0xc90001e,
+	 0xca0001e,
+	 0xcb0001e,
+	 0xcc0001e,
+	 0xcd0001e,
+	 0xce0001e,
+	 0xcf0001e,
+	 0xd00001e,
+	 0xd10001e,
+	 0xd20001e,
+	 0xd30001e,
+	 0xd40001e,
+	 0xd50001e,
+	 0xd60001e,
+	 0xd70001e,
+	 0xd80001e,
+	 0xd90001e,
+	 0xda0001e,
+	 0xdb0001e,
+	 0xdc0001e,
+	 0xdd0001e,
+	 0xde0001e,
+	 0xdf0001e,
+	 0xe00001e,
+	 0xe10001e,
+	 0xe20001e,
+	 0xe30001e,
+	 0xe40001e,
+	 0xe50001e,
+	 0xe60001e,
+	 0xe70001e,
+	 0xe80001e,
+	 0xe90001e,
+	 0xea0001e,
+	 0xeb0001e,
+	 0xec0001e,
+	 0xed0001e,
+	 0xee0001e,
+	 0xef0001e,
+	 0x400001e		/* default */
+	 }
+};
+
+/* a self contained prom info structure */
+struct leon_reloc_func {
+	struct property *(*find_property) (int node, char *name);
+	int (*strcmp) (char *s1, char *s2);
+	void *(*memcpy) (void *dest, const void *src, size_t n);
+	void (*reboot_physical) (char *cmd);
+	ambapp_dev_apbuart *leon3_apbuart;
+};
+
+struct leon_prom_info {
+	int freq_khz;
+	int leon_nctx;
+	int mids[32];
+	int baudrates[2];
+	struct leon_reloc_func reloc_funcs;
+	struct property root_properties[4];
+	struct property cpu_properties[7];
+#undef  CPUENTRY
+#define CPUENTRY(idx) struct property cpu_properties##idx[4]
+	 CPUENTRY(1);
+	 CPUENTRY(2);
+	 CPUENTRY(3);
+	 CPUENTRY(4);
+	 CPUENTRY(5);
+	 CPUENTRY(6);
+	 CPUENTRY(7);
+	 CPUENTRY(8);
+	 CPUENTRY(9);
+	 CPUENTRY(10);
+	 CPUENTRY(11);
+	 CPUENTRY(12);
+	 CPUENTRY(13);
+	 CPUENTRY(14);
+	 CPUENTRY(15);
+	 CPUENTRY(16);
+	 CPUENTRY(17);
+	 CPUENTRY(18);
+	 CPUENTRY(19);
+	 CPUENTRY(20);
+	 CPUENTRY(21);
+	 CPUENTRY(22);
+	 CPUENTRY(23);
+	 CPUENTRY(24);
+	 CPUENTRY(25);
+	 CPUENTRY(26);
+	 CPUENTRY(27);
+	 CPUENTRY(28);
+	 CPUENTRY(29);
+	 CPUENTRY(30);
+	 CPUENTRY(31);
+	struct idprom idprom;
+	struct linux_nodeops nodeops;
+	struct linux_mlist_v0 *totphys_p;
+	struct linux_mlist_v0 totphys;
+	struct linux_mlist_v0 *avail_p;
+	struct linux_mlist_v0 avail;
+	struct linux_mlist_v0 *prommap_p;
+	void (*synchook) (void);
+	struct linux_arguments_v0 *bootargs_p;
+	struct linux_arguments_v0 bootargs;
+	struct linux_romvec romvec;
+	struct node nodes[35];
+	char s_device_type[12];
+	char s_cpu[4];
+	char s_mid[4];
+	char s_idprom[7];
+	char s_compatability[14];
+	char s_leon2[6];
+	char s_mmu_nctx[9];
+	char s_frequency[16];
+	char s_uart1_baud[11];
+	char s_uart2_baud[11];
+	char arg[256];
+};
+
+/* static prom info */
+static struct leon_prom_info PROM_DATA spi = {
+	CONFIG_SYS_CLK_FREQ / 1000,
+	256,
+	{
+#undef	CPUENTRY
+#define	CPUENTRY(idx) idx
+	 CPUENTRY(0),
+	 CPUENTRY(1),
+	 CPUENTRY(2),
+	 CPUENTRY(3),
+	 CPUENTRY(4),
+	 CPUENTRY(5),
+	 CPUENTRY(6),
+	 CPUENTRY(7),
+	 CPUENTRY(8),
+	 CPUENTRY(9),
+	 CPUENTRY(10),
+	 CPUENTRY(11),
+	 CPUENTRY(12),
+	 CPUENTRY(13),
+	 CPUENTRY(14),
+	 CPUENTRY(15),
+	 CPUENTRY(16),
+	 CPUENTRY(17),
+	 CPUENTRY(18),
+	 CPUENTRY(19),
+	 CPUENTRY(20),
+	 CPUENTRY(21),
+	 CPUENTRY(22),
+	 CPUENTRY(23),
+	 CPUENTRY(24),
+	 CPUENTRY(25),
+	 CPUENTRY(26),
+	 CPUENTRY(27),
+	 CPUENTRY(28),
+	 CPUENTRY(29),
+	 CPUENTRY(30),
+	 31},
+	{38400, 38400},
+	{
+	 __va(find_property),
+	 __va(leon_strcmp),
+	 __va(leon_memcpy),
+	 __phy(leon_reboot_physical),
+	 },
+	{
+	 {__va(spi.s_device_type), __va(spi.s_idprom), 4},
+	 {__va(spi.s_idprom), (char *)__va(&spi.idprom), sizeof(struct idprom)},
+	 {__va(spi.s_compatability), __va(spi.s_leon2), 5},
+	 {NULL, NULL, -1}
+	 },
+	{
+	 {__va(spi.s_device_type), __va(spi.s_cpu), 4},
+	 {__va(spi.s_mid), __va(&spi.mids[0]), 4},
+	 {__va(spi.s_mmu_nctx), (char *)__va(&spi.leon_nctx), 4},
+	 {__va(spi.s_frequency), (char *)__va(&spi.freq_khz), 4},
+	 {__va(spi.s_uart1_baud), (char *)__va(&spi.baudrates[0]), 4},
+	 {__va(spi.s_uart2_baud), (char *)__va(&spi.baudrates[1]), 4},
+	 {NULL, NULL, -1}
+	 },
+#undef  CPUENTRY
+#define CPUENTRY(idx) \
+	{ /* cpu_properties */						\
+		{__va(spi.s_device_type), __va(spi.s_cpu), 4},		\
+		{__va(spi.s_mid), __va(&spi.mids[idx]), 4},			\
+		{__va(spi.s_frequency), (char *)__va(&spi.freq_khz), 4},	\
+		{NULL, NULL, -1}						\
+	}
+	CPUENTRY(1),
+	CPUENTRY(2),
+	CPUENTRY(3),
+	CPUENTRY(4),
+	CPUENTRY(5),
+	CPUENTRY(6),
+	CPUENTRY(7),
+	CPUENTRY(8),
+	CPUENTRY(9),
+	CPUENTRY(10),
+	CPUENTRY(11),
+	CPUENTRY(12),
+	CPUENTRY(13),
+	CPUENTRY(14),
+	CPUENTRY(15),
+	CPUENTRY(16),
+	CPUENTRY(17),
+	CPUENTRY(18),
+	CPUENTRY(19),
+	CPUENTRY(20),
+	CPUENTRY(21),
+	CPUENTRY(22),
+	CPUENTRY(23),
+	CPUENTRY(24),
+	CPUENTRY(25),
+	CPUENTRY(26),
+	CPUENTRY(27),
+	CPUENTRY(28),
+	CPUENTRY(29),
+	CPUENTRY(30),
+	CPUENTRY(31),
+	{
+	 0x01,			/* format */
+	 M_LEON2 | M_LEON2_SOC,	/* machine type */
+	 {0, 0, 0, 0, 0, 0},	/* eth */
+	 0,			/* date */
+	 0,			/* sernum */
+	 0,			/* checksum */
+	 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}	/* reserved */
+	 },
+	{
+	 __va(no_nextnode),
+	 __va(no_child),
+	 __va(no_proplen),
+	 __va(no_getprop),
+	 __va(no_setprop),
+	 __va(no_nextprop)
+	 },
+	__va(&spi.totphys),
+	{
+	 NULL,
+	 (char *)CFG_SDRAM_BASE,
+	 0,
+	 },
+	__va(&spi.avail),
+	{
+	 NULL,
+	 (char *)CFG_SDRAM_BASE,
+	 0,
+	 },
+	NULL,			/* prommap_p */
+	NULL,
+	__va(&spi.bootargs),
+	{
+	 {NULL, __va(spi.arg), NULL /*... */ },
+	 /*... */
+	 },
+	{
+	 0,
+	 0,			/* sun4c v0 prom */
+	 0, 0,
+	 {__va(&spi.totphys_p), __va(&spi.prommap_p), __va(&spi.avail_p)},
+	 __va(&spi.nodeops),
+	 NULL, {NULL /* ... */ },
+	 NULL, NULL,
+	 NULL, NULL,		/* pv_getchar, pv_putchar */
+	 __va(leon_nbgetchar), __va(leon_nbputchar),
+	 NULL,
+	 __va(leon_reboot),
+	 NULL,
+	 NULL,
+	 NULL,
+	 __va(leon_halt),
+	 __va(&spi.synchook),
+	 {NULL},
+	 __va(&spi.bootargs_p)
+	 /*... */
+	 },
+	{
+	 {0, __va(spi.root_properties + 3) /* NULL, NULL, -1 */ },
+	 {0, __va(spi.root_properties)},
+	 /* cpu 0, must be spi.nodes[2] see leon_prom_init() */
+	 {1, __va(spi.cpu_properties)},
+
+#undef  CPUENTRY
+#define CPUENTRY(idx) \
+	  {1, __va(spi.cpu_properties##idx) }	/* cpu <idx> */
+	 CPUENTRY(1),
+	 CPUENTRY(2),
+	 CPUENTRY(3),
+	 CPUENTRY(4),
+	 CPUENTRY(5),
+	 CPUENTRY(6),
+	 CPUENTRY(7),
+	 CPUENTRY(8),
+	 CPUENTRY(9),
+	 CPUENTRY(10),
+	 CPUENTRY(11),
+	 CPUENTRY(12),
+	 CPUENTRY(13),
+	 CPUENTRY(14),
+	 CPUENTRY(15),
+	 CPUENTRY(16),
+	 CPUENTRY(17),
+	 CPUENTRY(18),
+	 CPUENTRY(19),
+	 CPUENTRY(20),
+	 CPUENTRY(21),
+	 CPUENTRY(22),
+	 CPUENTRY(23),
+	 CPUENTRY(24),
+	 CPUENTRY(25),
+	 CPUENTRY(26),
+	 CPUENTRY(27),
+	 CPUENTRY(28),
+	 CPUENTRY(29),
+	 CPUENTRY(30),
+	 CPUENTRY(31),
+	 {-1, __va(spi.root_properties + 3) /* NULL, NULL, -1 */ }
+	 },
+	"device_type",
+	"cpu",
+	"mid",
+	"idprom",
+	"compatability",
+	"leon2",
+	"mmu-nctx",
+	"clock-frequency",
+	"uart1_baud",
+	"uart2_baud",
+	CONFIG_DEFAULT_KERNEL_COMMAND_LINE
+};
+
+/* from arch/sparc/kernel/setup.c */
+#define RAMDISK_LOAD_FLAG 0x4000
+extern unsigned short root_flags;
+extern unsigned short root_dev;
+extern unsigned short ram_flags;
+extern unsigned int sparc_ramdisk_image;
+extern unsigned int sparc_ramdisk_size;
+extern int root_mountflags;
+
+extern char initrd_end, initrd_start;
+
+/* Reboot the CPU = jump to beginning of flash again.
+ *
+ * Make sure that all function are inlined here.
+ */
+static void PROM_TEXT leon_reboot(char *bcommand)
+{
+	register char *arg = bcommand;
+	void __attribute__ ((noreturn)) (*reboot_physical) (char *cmd);
+
+	/* get physical address */
+	struct leon_prom_info *pspi =
+	    (void *)(CFG_PROM_OFFSET + sizeof(srmmu_tables));
+
+	unsigned int *srmmu_ctx_table;
+
+	/* Turn of Interrupts */
+	set_pil(0xf);
+
+	/* Set kernel's context, context zero */
+	srmmu_set_context(0);
+
+	/* Get physical address of the MMU shutdown routine */
+	reboot_physical = (void *)
+	    SPARC_BYPASS_READ(&pspi->reloc_funcs.reboot_physical);
+
+	/* Now that we know the physical address of the function
+	 * we can make the MMU allow jumping to it.
+	 */
+	srmmu_ctx_table = (unsigned int *)srmmu_get_ctable_ptr();
+
+	srmmu_ctx_table = (unsigned int *)SPARC_BYPASS_READ(srmmu_ctx_table);
+
+	/* get physical address of kernel's context table (assume ptd) */
+	srmmu_ctx_table = (unsigned int *)
+	    (((unsigned int)srmmu_ctx_table & 0xfffffffc) << 4);
+
+	/* enable access to physical address of MMU shutdown function */
+	SPARC_BYPASS_WRITE(&srmmu_ctx_table
+			   [((unsigned int)reboot_physical) >> 24],
+			   (((unsigned int)reboot_physical & 0xff000000) >> 4) |
+			   0x1e);
+
+	/* flush TLB cache */
+	leon_flush_tlb_all();
+
+	/* flash instruction & data cache */
+	sparc_icache_flush_all();
+	sparc_dcache_flush_all();
+
+	/* jump to physical address function
+	 * so that when the MMU is disabled
+	 * we can continue to execute
+	 */
+	reboot_physical(arg);
+}
+
+static void PROM_TEXT leon_reboot_physical(char *bcommand)
+{
+	void __attribute__ ((noreturn)) (*reset) (void);
+
+	/* Turn off MMU */
+	srmmu_set_mmureg(0);
+
+	/* Hardcoded start address */
+	reset = CFG_MONITOR_BASE;
+
+	/* flush data cache */
+	sparc_dcache_flush_all();
+
+	/* flush instruction cache */
+	sparc_icache_flush_all();
+
+	/* Jump to start in Flash */
+	reset();
+}
+
+static void PROM_TEXT leon_halt(void)
+{
+	while (1) ;
+}
+
+/* get single char, don't care for blocking*/
+static int PROM_TEXT leon_nbgetchar(void)
+{
+	return -1;
+}
+
+/* put single char, don't care for blocking*/
+static int PROM_TEXT leon_nbputchar(int c)
+{
+	ambapp_dev_apbuart *uart;
+
+	/* get physical address */
+	struct leon_prom_info *pspi =
+	    (void *)(CFG_PROM_OFFSET + sizeof(srmmu_tables));
+
+	uart = (ambapp_dev_apbuart *)
+	    SPARC_BYPASS_READ(&pspi->reloc_funcs.leon3_apbuart);
+
+	/* no UART? */
+	if (!uart)
+		return 0;
+
+	/***** put char in buffer... ***********
+	 * Make sure all functions are inline! *
+	 ***************************************/
+
+	/* Wait for last character to go. */
+	while (!(SPARC_BYPASS_READ(&uart->status)
+		 & LEON_REG_UART_STATUS_THE)) ;
+
+	/* Send data */
+	SPARC_BYPASS_WRITE(&uart->data, c);
+
+	/* Wait for data to be sent */
+	while (!(SPARC_BYPASS_READ(&uart->status)
+		 & LEON_REG_UART_STATUS_TSE)) ;
+
+	return 0;
+}
+
+/* node ops */
+
+/*#define nodes ((struct node *)__va(&pspi->nodes))*/
+#define nodes ((struct node *)(pspi->nodes))
+
+static int PROM_TEXT no_nextnode(int node)
+{
+	/* get physical address */
+	struct leon_prom_info *pspi =
+	    (void *)(CFG_PROM_OFFSET + sizeof(srmmu_tables));
+
+	/* convert into virtual address */
+	pspi = (struct leon_prom_info *)
+	    (((unsigned int)pspi & 0x0fffffff) | PAGE_OFFSET);
+
+	if (nodes[node].level == nodes[node + 1].level)
+		return node + 1;
+	return -1;
+}
+
+static int PROM_TEXT no_child(int node)
+{
+	/* get physical address */
+	struct leon_prom_info *pspi = (struct leon_prom_info *)
+	    (CFG_PROM_OFFSET + sizeof(srmmu_tables));
+
+	/* convert into virtual address */
+	pspi = (struct leon_prom_info *)
+	    (((unsigned int)pspi & 0x0fffffff) | PAGE_OFFSET);
+
+	if (nodes[node].level == nodes[node + 1].level - 1)
+		return node + 1;
+	return -1;
+}
+
+static struct property PROM_TEXT *find_property(int node, char *name)
+{
+	/* get physical address */
+	struct leon_prom_info *pspi = (struct leon_prom_info *)
+	    (CFG_PROM_OFFSET + sizeof(srmmu_tables));
+
+	/* convert into virtual address */
+	pspi = (struct leon_prom_info *)
+	    (((unsigned int)pspi & 0x0fffffff) | PAGE_OFFSET);
+
+	struct property *prop = &nodes[node].properties[0];
+	while (prop && prop->name) {
+		if (pspi->reloc_funcs.strcmp(prop->name, name) == 0)
+			return prop;
+		prop++;
+	}
+	return NULL;
+}
+
+static int PROM_TEXT no_proplen(int node, char *name)
+{
+	/* get physical address */
+	struct leon_prom_info *pspi = (struct leon_prom_info *)
+	    (CFG_PROM_OFFSET + sizeof(srmmu_tables));
+
+	/* convert into virtual address */
+	pspi = (struct leon_prom_info *)
+	    (((unsigned int)pspi & 0x0fffffff) | PAGE_OFFSET);
+
+	struct property *prop = pspi->reloc_funcs.find_property(node, name);
+	if (prop)
+		return prop->length;
+	return -1;
+}
+
+static int PROM_TEXT no_getprop(int node, char *name, char *value)
+{
+	/* get physical address */
+	struct leon_prom_info *pspi = (struct leon_prom_info *)
+	    (CFG_PROM_OFFSET + sizeof(srmmu_tables));
+
+	/* convert into virtual address */
+	pspi = (struct leon_prom_info *)
+	    (((unsigned int)pspi & 0x0fffffff) | PAGE_OFFSET);
+
+	struct property *prop = pspi->reloc_funcs.find_property(node, name);
+	if (prop) {
+		pspi->reloc_funcs.memcpy(value, prop->value, prop->length);
+		return 1;
+	}
+	return -1;
+}
+
+static int PROM_TEXT no_setprop(int node, char *name, char *value, int len)
+{
+	return -1;
+}
+
+static char PROM_TEXT *no_nextprop(int node, char *name)
+{
+	/* get physical address */
+	struct leon_prom_info *pspi = (struct leon_prom_info *)
+	    (CFG_PROM_OFFSET + sizeof(srmmu_tables));
+	struct property *prop;
+
+	/* convert into virtual address */
+	pspi = (struct leon_prom_info *)
+	    (((unsigned int)pspi & 0x0fffffff) | PAGE_OFFSET);
+
+	if (!name || !name[0])
+		return nodes[node].properties[0].name;
+
+	prop = pspi->reloc_funcs.find_property(node, name);
+	if (prop)
+		return prop[1].name;
+	return NULL;
+}
+
+static int PROM_TEXT leon_strcmp(const char *s1, const char *s2)
+{
+	register char result;
+
+	while (1) {
+		result = *s1 - *s2;
+		if (result || !*s1)
+			break;
+		s2++;
+		s1++;
+	}
+
+	return result;
+}
+
+static void *PROM_TEXT leon_memcpy(void *dest, const void *src, size_t n)
+{
+	char *dst = (char *)dest, *source = (char *)src;
+
+	while (n--) {
+		*dst = *source;
+		dst++;
+		source++;
+	}
+	return dest;
+}
+
+#define GETREGSP(sp) __asm__ __volatile__("mov %%sp, %0" : "=r" (sp))
+
+void leon_prom_init(struct leon_prom_info *pspi)
+{
+	unsigned long i;
+	unsigned char cksum, *ptr;
+	char *addr_str, *end;
+	unsigned long sp;
+	GETREGSP(sp);
+
+	pspi->freq_khz = CONFIG_SYS_CLK_FREQ / 1000;
+
+	/* Set Available main memory size */
+	pspi->totphys.num_bytes = CFG_PROM_OFFSET - CFG_SDRAM_BASE;
+	pspi->avail.num_bytes = pspi->totphys.num_bytes;
+
+	/* Set the pointer to the Console UART in romvec */
+	pspi->reloc_funcs.leon3_apbuart = leon3_apbuart;
+
+	{
+		int j = 1;
+#ifdef CONFIG_SMP
+		ambapp_dev_irqmp *b;
+		b = (ambapp_dev_irqmp *) leon3_getapbbase(VENDOR_GAISLER,
+							  GAISLER_IRQMP);
+		if (b) {
+			j = 1 + ((LEON3_BYPASS_LOAD_PA(&(b->mpstatus))
+				  >> LEON3_IRQMPSTATUS_CPUNR) & 0xf);
+		}
+#endif
+#undef nodes
+		pspi->nodes[2 + j].level = -1;
+		pspi->nodes[2 + j].properties = __va(spi.root_properties + 3);
+	}
+
+	/* Set Ethernet MAC address from environment */
+	if ((addr_str = getenv("ethaddr")) != NULL) {
+		for (i = 0; i < 6; i++) {
+			pspi->idprom.id_ethaddr[i] = addr_str ?
+			    simple_strtoul(addr_str, &end, 16) : 0;
+			if (addr_str) {
+				addr_str = (*end) ? end + 1 : end;
+			}
+		}
+	} else {
+		/* HW Address not found in environment,
+		 * Set default HW address
+		 */
+		pspi->idprom.id_ethaddr[0] = 0;
+		pspi->idprom.id_ethaddr[1] = 0;
+		pspi->idprom.id_ethaddr[2] = 0;
+		pspi->idprom.id_ethaddr[3] = 0;
+		pspi->idprom.id_ethaddr[4] = 0;
+		pspi->idprom.id_ethaddr[5] = 0;
+	}
+
+	ptr = (unsigned char *)&pspi->idprom;
+	for (i = cksum = 0; i <= 0x0E; i++)
+		cksum ^= *ptr++;
+	pspi->idprom.id_cksum = cksum;
+}
+
+static inline void set_cache(unsigned long regval)
+{
+	asm volatile ("sta %0, [%%g0] %1\n\t":: "r" (regval), "i"(2):"memory");
+}
+
+extern unsigned short bss_start, bss_end;
+
+/* mark as section .img.main.text, to be referenced in linker script */
+int prom_init(void)
+{
+	struct leon_prom_info *pspi = (void *)
+	    ((((unsigned int)&spi) & PROM_SIZE_MASK) + CFG_PROM_OFFSET);
+
+	/* disable mmu */
+	srmmu_set_mmureg(0x00000000);
+	__asm__ __volatile__("flush\n\t");
+
+	/* init prom info struct */
+	leon_prom_init(pspi);
+
+	kernel_arg_promvec = &pspi->romvec;
+#ifdef PRINT_ROM_VEC
+	printf("Kernel rom vec: 0x%lx\n", (unsigned int)(&pspi->romvec));
+#endif
+	return 0;
+}
+
+/* Copy current kernel boot argument to ROMvec */
+void prepare_bootargs(char *bootargs)
+{
+	struct leon_prom_info *pspi;
+	char *src, *dst;
+	int left;
+
+	/* if no bootargs set, skip copying ==> default bootline */
+	if (bootargs && (*bootargs != '\0')) {
+		pspi = (void *)((((unsigned int)&spi) & PROM_SIZE_MASK) +
+				CFG_PROM_OFFSET);
+		src = bootargs;
+		dst = &pspi->arg[0];
+		left = 255;	/* max len */
+		while (*src && left > 0) {
+			*dst++ = *src++;
+			left--;
+		}
+		/* terminate kernel command line string */
+		*dst = 0;
+	}
+}
+
+void srmmu_init_cpu(unsigned int entry)
+{
+	sparc_srmmu_setup *psrmmu_tables = (void *)
+	    ((((unsigned int)&srmmu_tables) & PROM_SIZE_MASK) +
+	     CFG_PROM_OFFSET);
+
+	/* Make context 0 (kernel's context) point
+	 * to our prepared memory mapping
+	 */
+#define PTD 1
+	psrmmu_tables->ctx_table[0] =
+	    ((unsigned int)&psrmmu_tables->pgd_table[0x00]) >> 4 | PTD;
+
+	/* Set virtual kernel address 0xf0000000
+	 * to SRAM/SDRAM address.
+	 * Make it READ/WRITE/EXEC to SuperUser
+	 */
+#define PTE 2
+#define ACC_SU_ALL 0x1c
+	psrmmu_tables->pgd_table[0xf0] =
+	    (CFG_SDRAM_BASE >> 4) | ACC_SU_ALL | PTE;
+	psrmmu_tables->pgd_table[0xf1] =
+	    ((CFG_SDRAM_BASE + 0x1000000) >> 4) | ACC_SU_ALL | PTE;
+	psrmmu_tables->pgd_table[0xf2] =
+	    ((CFG_SDRAM_BASE + 0x2000000) >> 4) | ACC_SU_ALL | PTE;
+	psrmmu_tables->pgd_table[0xf3] =
+	    ((CFG_SDRAM_BASE + 0x3000000) >> 4) | ACC_SU_ALL | PTE;
+	psrmmu_tables->pgd_table[0xf4] =
+	    ((CFG_SDRAM_BASE + 0x4000000) >> 4) | ACC_SU_ALL | PTE;
+	psrmmu_tables->pgd_table[0xf5] =
+	    ((CFG_SDRAM_BASE + 0x5000000) >> 4) | ACC_SU_ALL | PTE;
+	psrmmu_tables->pgd_table[0xf6] =
+	    ((CFG_SDRAM_BASE + 0x6000000) >> 4) | ACC_SU_ALL | PTE;
+	psrmmu_tables->pgd_table[0xf7] =
+	    ((CFG_SDRAM_BASE + 0x7000000) >> 4) | ACC_SU_ALL | PTE;
+
+	/* convert rom vec pointer to virtual address */
+	kernel_arg_promvec = (struct linux_romvec *)
+	    (((unsigned int)kernel_arg_promvec & 0x0fffffff) | 0xf0000000);
+
+	/* Set Context pointer to point to context table
+	 * 256 contexts supported.
+	 */
+	srmmu_set_ctable_ptr((unsigned int)&psrmmu_tables->ctx_table[0]);
+
+	/* Set kernel's context, context zero */
+	srmmu_set_context(0);
+
+	/* Invalidate all Cache */
+	__asm__ __volatile__("flush\n\t");
+
+	srmmu_set_mmureg(0x00000001);
+	leon_flush_tlb_all();
+	leon_flush_cache_all();
+}
diff --git a/cpu/leon3/serial.c b/cpu/leon3/serial.c
new file mode 100644
index 0000000..27d5cd3
--- /dev/null
+++ b/cpu/leon3/serial.c
@@ -0,0 +1,139 @@
+/* GRLIB APBUART Serial controller driver
+ *
+ * (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 <asm/processor.h>
+#include <asm/leon.h>
+#include <ambapp.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* Force cache miss each time a serial controller reg is read */
+#define CACHE_BYPASS 1
+
+#ifdef CACHE_BYPASS
+#define READ_BYTE(var)  SPARC_NOCACHE_READ_BYTE((unsigned int)&(var))
+#define READ_HWORD(var) SPARC_NOCACHE_READ_HWORD((unsigned int)&(var))
+#define READ_WORD(var)  SPARC_NOCACHE_READ((unsigned int)&(var))
+#define READ_DWORD(var) SPARC_NOCACHE_READ_DWORD((unsigned int)&(var))
+#endif
+
+ambapp_dev_apbuart *leon3_apbuart = NULL;
+
+int serial_init(void)
+{
+	ambapp_apbdev apbdev;
+	unsigned int tmp;
+
+	/* find UART */
+	if (ambapp_apb_first(VENDOR_GAISLER, GAISLER_APBUART, &apbdev) == 1) {
+
+		leon3_apbuart = (ambapp_dev_apbuart *) apbdev.address;
+
+		/* found apbuart, let's init...
+		 *
+		 * Set scaler / baud rate
+		 *
+		 * Receiver & transmitter enable
+		 */
+		leon3_apbuart->scaler = CFG_GRLIB_APBUART_SCALER;
+
+		/* Let bit 11 be unchanged (debug bit for GRMON) */
+		tmp = READ_WORD(leon3_apbuart->ctrl);
+
+		leon3_apbuart->ctrl = ((tmp & LEON_REG_UART_CTRL_DBG) |
+				       LEON_REG_UART_CTRL_RE |
+				       LEON_REG_UART_CTRL_TE);
+
+		return 0;
+	}
+	return -1;		/* didn't find hardware */
+}
+
+void serial_putc(const char c)
+{
+	if (c == '\n')
+		serial_putc_raw('\r');
+
+	serial_putc_raw(c);
+}
+
+void serial_putc_raw(const char c)
+{
+	if (!leon3_apbuart)
+		return;
+
+	/* Wait for last character to go. */
+	while (!(READ_WORD(leon3_apbuart->status) & LEON_REG_UART_STATUS_THE)) ;
+
+	/* Send data */
+	leon3_apbuart->data = c;
+
+#ifdef LEON_DEBUG
+	/* Wait for data to be sent */
+	while (!(READ_WORD(leon3_apbuart->status) & LEON_REG_UART_STATUS_TSE)) ;
+#endif
+}
+
+void serial_puts(const char *s)
+{
+	while (*s) {
+		serial_putc(*s++);
+	}
+}
+
+int serial_getc(void)
+{
+	if (!leon3_apbuart)
+		return 0;
+
+	/* Wait for a character to arrive. */
+	while (!(READ_WORD(leon3_apbuart->status) & LEON_REG_UART_STATUS_DR)) ;
+
+	/* read data */
+	return READ_WORD(leon3_apbuart->data);
+}
+
+int serial_tstc(void)
+{
+	if (leon3_apbuart)
+		return (READ_WORD(leon3_apbuart->status) &
+			LEON_REG_UART_STATUS_DR);
+	return 0;
+}
+
+/* set baud rate for uart */
+void serial_setbrg(void)
+{
+	/* update baud rate settings, read it from gd->baudrate */
+	unsigned int scaler;
+	if (leon3_apbuart && (gd->baudrate > 0)) {
+		scaler =
+		    (((CONFIG_SYS_CLK_FREQ * 10) / (gd->baudrate * 8)) -
+		     5) / 10;
+		leon3_apbuart->scaler = scaler;
+	}
+	return;
+}
diff --git a/cpu/leon3/start.S b/cpu/leon3/start.S
new file mode 100644
index 0000000..807f7e8
--- /dev/null
+++ b/cpu/leon3/start.S
@@ -0,0 +1,616 @@
+/* This is where the SPARC/LEON3 starts
+ * Copyright (C) 2007,
+ * Daniel Hellstrom, 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 <config.h>
+#include <asm/asmmacro.h>
+#include <asm/winmacro.h>
+#include <asm/psr.h>
+#include <asm/stack.h>
+#include <asm/leon.h>
+#include <version.h>
+
+/* Entry for traps which jump to a programmer-specified trap handler.  */
+#define TRAPR(H)  \
+	wr 	%g0, 0xfe0, %psr; \
+	mov 	%g0, %tbr; \
+	ba 	(H); \
+	mov 	%g0, %wim;
+
+#define TRAP(H) \
+	mov	%psr, %l0; \
+	ba	(H); \
+	nop; nop;
+
+#define TRAPI(ilevel) \
+	mov 	ilevel, %l7; \
+	mov 	%psr, %l0; \
+	b 	_irq_entry; \
+	mov 	%wim, %l3
+
+/* Unexcpected trap will halt the processor by forcing it to error state */
+#undef BAD_TRAP
+#define BAD_TRAP ta 0; nop; nop; nop;
+
+/* Software trap. Treat as BAD_TRAP for the time being... */
+#define SOFT_TRAP TRAP(_hwerr)
+
+#define PSR_INIT   0x1FC0	/* Disable traps, set s and ps */
+#define WIM_INIT   2
+
+/* All traps low-level code here must end with this macro. */
+#define RESTORE_ALL b ret_trap_entry; clr %l6;
+
+#define WRITE_PAUSE nop;nop;nop
+
+WINDOWSIZE = (16 * 4)
+ARGPUSHSIZE = (6 * 4)
+ARGPUSH = (WINDOWSIZE + 4)
+MINFRAME = (WINDOWSIZE + ARGPUSHSIZE + 4)
+
+/* Number of register windows */
+#ifndef CFG_SPARC_NWINDOWS
+#error Must define number of SPARC register windows, default is 8
+#endif
+
+#define STACK_ALIGN	8
+#define SA(X)	(((X)+(STACK_ALIGN-1)) & ~(STACK_ALIGN-1))
+
+	.section ".start", "ax"
+	.globl 	_start, start, _trap_table
+	.globl  _irq_entry, nmi_trap
+	.globl  _reset_reloc
+
+/* at address 0
+ * Hardware traps
+ */
+start:
+_start:
+_trap_table:
+	TRAPR(_hardreset);		! 00 reset trap
+	BAD_TRAP;			! 01 instruction_access_exception
+	BAD_TRAP;			! 02 illegal_instruction
+	BAD_TRAP;			! 03 priveleged_instruction
+	BAD_TRAP;			! 04 fp_disabled
+	TRAP(_window_overflow);		! 05 window_overflow
+	TRAP(_window_underflow);	! 06 window_underflow
+	BAD_TRAP;			! 07 Memory Address Not Aligned
+	BAD_TRAP;			! 08 Floating Point Exception
+	BAD_TRAP;			! 09 Data Miss Exception
+	BAD_TRAP;			! 0a Tagged Instruction Ovrflw
+	BAD_TRAP;			! 0b Watchpoint Detected
+	BAD_TRAP;			! 0c
+	BAD_TRAP;			! 0d
+	BAD_TRAP;			! 0e
+	BAD_TRAP;			! 0f
+	BAD_TRAP;			! 10
+	TRAPI(1);			! 11 IRQ level 1
+	TRAPI(2);			! 12 IRQ level 2
+	TRAPI(3);			! 13 IRQ level 3
+	TRAPI(4);			! 14 IRQ level 4
+	TRAPI(5);			! 15 IRQ level 5
+	TRAPI(6);			! 16 IRQ level 6
+	TRAPI(7);			! 17 IRQ level 7
+	TRAPI(8);			! 18 IRQ level 8
+	TRAPI(9);			! 19 IRQ level 9
+	TRAPI(10);			! 1a IRQ level 10
+	TRAPI(11);			! 1b IRQ level 11
+	TRAPI(12);			! 1c IRQ level 12
+	TRAPI(13);			! 1d IRQ level 13
+	TRAPI(14);			! 1e IRQ level 14
+	TRAP(_nmi_trap);		! 1f IRQ level 15 /
+	                		! NMI (non maskable interrupt)
+	BAD_TRAP;			! 20 r_register_access_error
+	BAD_TRAP;			! 21 instruction access error
+	BAD_TRAP;			! 22
+	BAD_TRAP;			! 23
+	BAD_TRAP;			! 24 co-processor disabled
+	BAD_TRAP;			! 25 uniplemented FLUSH
+	BAD_TRAP;			! 26
+	BAD_TRAP;			! 27
+	BAD_TRAP;			! 28 co-processor exception
+	BAD_TRAP;			! 29 data access error
+	BAD_TRAP;			! 2a division by zero
+	BAD_TRAP;			! 2b data store error
+	BAD_TRAP;			! 2c data access MMU miss
+	BAD_TRAP;			! 2d
+	BAD_TRAP;			! 2e
+	BAD_TRAP;			! 2f
+	BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 30-33
+	BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 34-37
+	BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 38-3b
+	BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 3c-3f
+	BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 40-43
+	BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 44-47
+	BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 48-4b
+	BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 4c-4f
+	BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 50-53
+	BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 54-57
+	BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 58-5b
+	BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 5c-5f
+
+	/* implementaion dependent */
+	BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 60-63
+	BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 64-67
+	BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 68-6b
+	BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 6c-6f
+	BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 70-73
+	BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 74-77
+	BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 78-7b
+	BAD_TRAP; BAD_TRAP; BAD_TRAP; BAD_TRAP; ! 7c-7f
+
+	/* Software traps, not handled */
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! 80-83
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! 84-87
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! 88-8b
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! 8c-8f
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! 90-93
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! 94-97
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! 98-9b
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! 9c-9f
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! a0-a3
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! a4-a7
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! a8-ab
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! ac-af
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! b0-b3
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! b4-b7
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! b8-bb
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! bc-bf
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! c0-c3
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! c4-c7
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! c8-cb
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! cc-cf
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! d0-d3
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! d4-d7
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! d8-db
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! dc-df
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! e0-e3
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! e4-e7
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! e8-eb
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! ec-ef
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! f0-f3
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! f4-f7
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! f8-fb
+	SOFT_TRAP; SOFT_TRAP; SOFT_TRAP; SOFT_TRAP;	! fc-ff
+/*
+ * Version string
+ */
+
+	.data
+	.extern leon3_snooping_avail
+	.globl	version_string
+version_string:
+	.ascii U_BOOT_VERSION
+	.ascii " (", __DATE__, " - ", __TIME__, ")"
+	.ascii CONFIG_IDENT_STRING, "\0"
+
+	.section	".text"
+	.align 4
+
+_hardreset:
+1000:
+	flush
+
+	/* Enable I/D-Cache and Snooping */
+	set	0x0081000f, %g2
+	sta	%g2, [%g0] 2
+
+	mov	%g0, %y
+	clr	%g1
+	clr	%g2
+	clr	%g3
+	clr	%g4
+	clr	%g5
+	clr	%g6
+	clr	%g7
+
+	mov	%asr17, %g3
+	and	%g3, 0x1f, %g3
+clear_window:
+	mov	%g0, %l0
+	mov	%g0, %l1
+	mov	%g0, %l2
+	mov	%g0, %l3
+	mov	%g0, %l4
+	mov	%g0, %l5
+	mov	%g0, %l6
+	mov	%g0, %l7
+	mov	%g0, %o0
+	mov	%g0, %o1
+	mov	%g0, %o2
+	mov	%g0, %o3
+	mov	%g0, %o4
+	mov	%g0, %o5
+	mov	%g0, %o6
+	mov	%g0, %o7
+	subcc	%g3, 1, %g3
+	bge	clear_window
+	save
+
+wininit:
+	set	WIM_INIT, %g3
+	mov	%g3, %wim
+
+stackp:
+	set	CFG_INIT_SP_OFFSET, %fp
+	andn	%fp, 0x0f, %fp
+	sub	%fp, 64, %sp
+
+cpu_init_unreloc:
+	call	cpu_init_f
+	nop
+
+/* un relocated start address of monitor */
+#define TEXT_START _text
+
+/* un relocated end address of monitor */
+#define DATA_END __init_end
+
+reloc:
+	set	TEXT_START,%g2
+	set	DATA_END,%g3
+	set	CFG_RELOC_MONITOR_BASE,%g4
+reloc_loop:
+	ldd	[%g2],%l0
+	ldd	[%g2+8],%l2
+	std	%l0,[%g4]
+	std	%l2,[%g4+8]
+	inc	16,%g2
+	subcc	%g3,%g2,%g0
+	bne	reloc_loop
+	inc	16,%g4
+
+	clr	%l0
+	clr	%l1
+	clr	%l2
+	clr	%l3
+	clr	%g2
+
+/* register g4 contain address to start
+ * This means that BSS must be directly after data and code segments
+ *
+ * g3 is length of bss = (__bss_end-__bss_start)
+ *
+ */
+
+clr_bss:
+/* clear bss area (the relocated) */
+	set	__bss_start,%g2
+	set	__bss_end,%g3
+	sub	%g3,%g2,%g3
+	add	%g3,%g4,%g3
+	clr	%g1	/* std %g0 uses g0 and g1 */
+/* clearing 16byte a time ==> linker script need to align to 16 byte offset */
+clr_bss_16:
+	std	%g0,[%g4]
+	std	%g0,[%g4+8]
+	inc	16,%g4
+	cmp	%g3,%g4
+	bne	clr_bss_16
+	nop
+
+/* add offsets to GOT table */
+fixup_got:
+	set	__got_start,%g4
+	set	__got_end,%g3
+/*
+ * new got offset = (old GOT-PTR (read with ld) -
+ *   CFG_RELOC_MONITOR_BASE(from define) ) +
+ *   Destination Address (from define)
+ */
+	set	CFG_RELOC_MONITOR_BASE,%g2
+	set	TEXT_START, %g1
+	add	%g4,%g2,%g4
+	sub	%g4,%g1,%g4
+	add	%g3,%g2,%g3
+	sub	%g3,%g1,%g3
+	sub	%g2,%g1,%g2	! prepare register with (new base address) -
+				!  (old base address)
+got_loop:
+	ld	[%g4],%l0	! load old GOT-PTR
+	add	%l0,%g2,%l0	! increase with (new base address) -
+				!  (old base)
+	st	%l0,[%g4]
+	inc	4,%g4
+	cmp	%g3,%g4
+	bne	got_loop
+	nop
+
+prom_relocate:
+	set	__prom_start, %g2
+	set	__prom_end, %g3
+	set	CFG_PROM_OFFSET, %g4
+
+prom_relocate_loop:
+	ldd	[%g2],%l0
+	ldd	[%g2+8],%l2
+	std	%l0,[%g4]
+	std	%l2,[%g4+8]
+	inc	16,%g2
+	subcc	%g3,%g2,%g0
+	bne	prom_relocate_loop
+	inc	16,%g4
+
+/* Trap table has been moved, lets tell CPU about
+ * the new trap table address
+ */
+
+	set	CFG_RELOC_MONITOR_BASE, %g2
+	wr	%g0, %g2, %tbr
+	nop
+	nop
+	nop
+	
+/* If CACHE snooping is available in hardware the 
+ * variable leon3_snooping_avail will be set to
+ * 0x800000 else 0.
+ */
+snoop_detect:
+	sethi	%hi(0x00800000), %o0
+	lda	[%g0] 2, %o1
+	and	%o0, %o1, %o0
+	sethi	%hi(leon3_snooping_avail+CFG_RELOC_MONITOR_BASE-TEXT_BASE), %o1
+	st	%o0, [%lo(leon3_snooping_avail+CFG_RELOC_MONITOR_BASE-TEXT_BASE)+%o1]
+
+/*	call	relocate*/
+	nop
+/* Call relocated init functions */
+jump:
+	set	cpu_init_f2,%o1
+	set	CFG_RELOC_MONITOR_BASE,%o2
+	add	%o1,%o2,%o1
+	sub	%o1,%g1,%o1
+	call	%o1
+	clr	%o0
+
+	set	board_init_f,%o1
+	set	CFG_RELOC_MONITOR_BASE,%o2
+	add	%o1,%o2,%o1
+	sub	%o1,%g1,%o1
+	call	%o1
+	clr	%o0
+
+dead:	ta 0				! if call returns...
+	nop
+
+/* Interrupt handler caller,
+ * reg L7: interrupt number
+ * reg L0: psr after interrupt
+ * reg L1: PC
+ * reg L2: next PC
+ * reg L3: wim
+ */
+_irq_entry:
+	SAVE_ALL
+
+	or	%l0, PSR_PIL, %g2
+	wr	%g2, 0x0, %psr
+	WRITE_PAUSE
+	wr	%g2, PSR_ET, %psr
+	WRITE_PAUSE
+	mov	%l7, %o0		! irq level
+	set	handler_irq, %o1
+	set	(CFG_RELOC_MONITOR_BASE-TEXT_BASE), %o2
+	add	%o1, %o2, %o1
+	call	%o1
+	add	%sp, SF_REGS_SZ, %o1	! pt_regs ptr
+	or	%l0, PSR_PIL, %g2	! restore PIL after handler_irq
+	wr	%g2, PSR_ET, %psr	! keep ET up
+	WRITE_PAUSE
+
+	RESTORE_ALL
+
+!Window overflow trap handler.
+	.global _window_overflow
+
+_window_overflow:
+
+	mov	%wim, %l3		! Calculate next WIM
+	mov	%g1, %l7
+	srl	%l3, 1, %g1
+	sll	%l3, (CFG_SPARC_NWINDOWS-1) , %l4
+	or	%l4, %g1, %g1
+
+	save				! Get into window to be saved.
+	mov	%g1, %wim
+	nop;
+	nop;
+	nop
+	st	%l0, [%sp + 0];
+	st	%l1, [%sp + 4];
+	st	%l2, [%sp + 8];
+	st	%l3, [%sp + 12];
+	st	%l4, [%sp + 16];
+	st	%l5, [%sp + 20];
+	st	%l6, [%sp + 24];
+	st	%l7, [%sp + 28];
+	st	%i0, [%sp + 32];
+	st	%i1, [%sp + 36];
+	st	%i2, [%sp + 40];
+	st	%i3, [%sp + 44];
+	st	%i4, [%sp + 48];
+	st	%i5, [%sp + 52];
+	st	%i6, [%sp + 56];
+	st	%i7, [%sp + 60];
+	restore				! Go back to trap window.
+	mov	%l7, %g1
+	jmp	%l1			! Re-execute save.
+	rett	%l2
+
+/* Window underflow trap handler.  */
+
+	.global  _window_underflow
+
+_window_underflow:
+
+	mov  %wim, %l3			! Calculate next WIM
+	sll  %l3, 1, %l4
+	srl  %l3, (CFG_SPARC_NWINDOWS-1), %l5
+	or   %l5, %l4, %l5
+	mov  %l5, %wim
+	nop; nop; nop
+	restore				! Two restores to get into the
+	restore				! window to restore
+	ld	[%sp + 0], %l0; 	! Restore window from the stack
+	ld	[%sp + 4], %l1;
+	ld	[%sp + 8], %l2;
+	ld	[%sp + 12], %l3;
+	ld	[%sp + 16], %l4;
+	ld	[%sp + 20], %l5;
+	ld	[%sp + 24], %l6;
+	ld	[%sp + 28], %l7;
+	ld	[%sp + 32], %i0;
+	ld	[%sp + 36], %i1;
+	ld	[%sp + 40], %i2;
+	ld	[%sp + 44], %i3;
+	ld	[%sp + 48], %i4;
+	ld	[%sp + 52], %i5;
+	ld	[%sp + 56], %i6;
+	ld	[%sp + 60], %i7;
+	save				! Get back to the trap window.
+	save
+	jmp	%l1			! Re-execute restore.
+	rett	%l2
+
+	retl
+
+_nmi_trap:
+	nop
+	jmp %l1
+	rett %l2
+
+_hwerr:
+	ta 0
+	nop
+	nop
+	b _hwerr 			! loop infinite
+	nop
+
+/* Registers to not touch at all. */
+#define t_psr      l0 /* Set by caller */
+#define t_pc       l1 /* Set by caller */
+#define t_npc      l2 /* Set by caller */
+#define t_wim      l3 /* Set by caller */
+#define t_twinmask l4 /* Set at beginning of this entry routine. */
+#define t_kstack   l5 /* Set right before pt_regs frame is built */
+#define t_retpc    l6 /* If you change this, change winmacro.h header file */
+#define t_systable l7 /* Never touch this, could be the syscall table ptr. */
+#define curptr     g6 /* Set after pt_regs frame is built */
+
+trap_setup:
+/* build a pt_regs trap frame. */
+	sub	%fp, (SF_REGS_SZ + PT_REGS_SZ), %t_kstack
+	PT_STORE_ALL(t_kstack, t_psr, t_pc, t_npc, g2)
+
+	/* See if we are in the trap window. */
+	mov	1, %t_twinmask
+	sll	%t_twinmask, %t_psr, %t_twinmask ! t_twinmask = (1 << psr)
+	andcc	%t_twinmask, %t_wim, %g0
+	beq	1f		! in trap window, clean up
+	nop
+
+	/*-------------------------------------------------
+	 * Spill , adjust %wim and go.
+	 */
+	srl	%t_wim, 0x1, %g2		! begin computation of new %wim
+
+	set	(CFG_SPARC_NWINDOWS-1), %g3	!NWINDOWS-1
+
+	sll	%t_wim, %g3, %t_wim	! NWINDOWS-1
+	or	%t_wim, %g2, %g2
+	and	%g2, 0xff, %g2
+
+	save	%g0, %g0, %g0           ! get in window to be saved
+
+	/* Set new %wim value */
+	wr	%g2, 0x0, %wim
+
+	/* Save the kernel window onto the corresponding stack. */
+	RW_STORE(sp)
+
+	restore	%g0, %g0, %g0
+	/*-------------------------------------------------*/
+
+1:
+	/* Trap from kernel with a window available.
+	 * Just do it...
+	 */
+	jmpl	%t_retpc + 0x8, %g0	! return to caller
+	 mov	%t_kstack, %sp		! jump onto new stack
+
+#define twin_tmp1 l4
+#define glob_tmp  g4
+#define curptr    g6
+ret_trap_entry:
+	wr	%t_psr, 0x0, %psr       ! enable nesting again, clear ET
+
+	/* Will the rett land us in the invalid window? */
+	mov	2, %g1
+	sll	%g1, %t_psr, %g1
+
+	set	CFG_SPARC_NWINDOWS, %g2	!NWINDOWS
+
+	srl	%g1, %g2, %g2
+	or	%g1, %g2, %g1
+	rd	%wim, %g2
+	andcc	%g2, %g1, %g0
+	be	1f		! Nope, just return from the trap
+	 sll	%g2, 0x1, %g1
+
+	/* We have to grab a window before returning. */
+	set	(CFG_SPARC_NWINDOWS-1), %g3	!NWINDOWS-1
+
+	srl	%g2, %g3,  %g2
+	or	%g1, %g2, %g1
+	and	%g1, 0xff, %g1
+
+	wr	%g1, 0x0, %wim
+
+	/* Grrr, make sure we load from the right %sp... */
+	PT_LOAD_ALL(sp, t_psr, t_pc, t_npc, g1)
+
+	restore	%g0, %g0, %g0
+	RW_LOAD(sp)
+	b	2f
+	save	%g0, %g0, %g0
+
+	/* Reload the entire frame in case this is from a
+	 * kernel system call or whatever...
+	 */
+1:
+	PT_LOAD_ALL(sp, t_psr, t_pc, t_npc, g1)
+2:
+	wr	%t_psr, 0x0, %psr
+	nop;
+	nop;
+	nop
+
+	jmp	%t_pc
+	rett	%t_npc
+
+/* This is called from relocated C-code.
+ * It resets the system by jumping to _start
+ */
+_reset_reloc:
+	set	start, %l0
+	call	%l0
+	nop
diff --git a/cpu/leon3/usb_uhci.c b/cpu/leon3/usb_uhci.c
new file mode 100644
index 0000000..7910beb
--- /dev/null
+++ b/cpu/leon3/usb_uhci.c
@@ -0,0 +1,1313 @@
+/*
+ * Part of this code has been derived from linux:
+ * Universal Host Controller Interface driver for USB (take II).
+ *
+ * (c) 1999-2001 Georg Acher, acher@in.tum.de (executive slave) (base guitar)
+ *               Deti Fliegl, deti@fliegl.de (executive slave) (lead voice)
+ *               Thomas Sailer, sailer@ife.ee.ethz.ch (chief consultant) (cheer leader)
+ *               Roman Weissgaerber, weissg@vienna.at (virt root hub) (studio porter)
+ * (c) 2000      Yggdrasil Computing, Inc. (port of new PCI interface support
+ *               from usb-ohci.c by Adam Richter, adam@yggdrasil.com).
+ * (C) 2000      David Brownell, david-b@pacbell.net (usb-ohci.c)
+ *
+ * HW-initalization based on material of
+ *
+ * (C) Copyright 1999 Linus Torvalds
+ * (C) Copyright 1999 Johannes Erdfelt
+ * (C) Copyright 1999 Randy Dunlap
+ * (C) Copyright 1999 Gregory P. Smith
+ *
+ *
+ * Adapted for U-Boot:
+ * (C) Copyright 2001 Denis Peter, MPL AG Switzerland
+ * (C) Copyright 2008, Daniel Hellström, daniel@gaisler.com
+ *     Added AMBA Plug&Play detection of GRUSB, modified interrupt handler.
+ *     Added cache flushes where needed.
+ *
+ * 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
+ *
+ *
+ */
+
+/**********************************************************************
+ * How it works:
+ * -------------
+ * The framelist / Transfer descriptor / Queue Heads are similar like
+ * in the linux usb_uhci.c.
+ *
+ * During initialization, the following skeleton is allocated in init_skel:
+ *
+ *         framespecific           |           common chain
+ *
+ * framelist[]
+ * [  0 ]-----> TD ---------\
+ * [  1 ]-----> TD ----------> TD ------> QH -------> QH -------> QH ---> NULL
+ *   ...        TD ---------/
+ * [1023]-----> TD --------/
+ *
+ *              ^^             ^^         ^^          ^^          ^^
+ *              7 TDs for      1 TD for   Start of    Start of    End Chain
+ *              INT (2-128ms)  1ms-INT    CTRL Chain  BULK Chain
+ *
+ *
+ * Since this is a bootloader, the isochronous transfer descriptor have been removed.
+ *
+ * Interrupt Transfers.
+ * --------------------
+ * For Interupt transfers USB_MAX_TEMP_INT_TD Transfer descriptor are available. They
+ * will be inserted after the appropriate (depending the interval setting) skeleton TD.
+ * If an interrupt has been detected the dev->irqhandler is called. The status and number
+ * of transfered bytes is stored in dev->irq_status resp. dev->irq_act_len. If the
+ * dev->irqhandler returns 0, the interrupt TD is removed and disabled. If an 1 is returned,
+ * the interrupt TD will be reactivated.
+ *
+ * Control Transfers
+ * -----------------
+ * Control Transfers are issued by filling the tmp_td with the appropriate data and connect
+ * them to the qh_cntrl queue header. Before other control/bulk transfers can be issued,
+ * the programm has to wait for completion. This does not allows asynchronous data transfer.
+ *
+ * Bulk Transfers
+ * --------------
+ * Bulk Transfers are issued by filling the tmp_td with the appropriate data and connect
+ * them to the qh_bulk queue header. Before other control/bulk transfers can be issued,
+ * the programm has to wait for completion. This does not allows asynchronous data transfer.
+ *
+ *
+ */
+
+#include <common.h>
+#include <ambapp.h>
+#include <asm/leon.h>
+#include <asm/leon3.h>
+#include <asm/processor.h>
+
+#ifdef CONFIG_USB_UHCI
+
+#include <usb.h>
+#include "usb_uhci.h"
+
+#define USB_MAX_TEMP_TD      128	/* number of temporary TDs for bulk and control transfers */
+#define USB_MAX_TEMP_INT_TD  32	/* number of temporary TDs for Interrupt transfers */
+
+extern int leon3_snooping_avail;
+/*
+#define out16r(address,data) (*(unsigned short *)(address) = \
+ (unsigned short)( \
+ (((unsigned short)(data)&0xff)<<8) | \
+ (((unsigned short)(data)&0xff00)>>8) \
+ ))
+ */
+#define out16r(address,data) _out16r((unsigned int)(address), (unsigned short)(data))
+void _out16r(unsigned int address, unsigned short data)
+{
+	unsigned short val = (unsigned short)((((unsigned short)(data) & 0xff)
+					       << 8) | (((unsigned short)(data)
+							 & 0xff00) >> 8));
+#ifdef UHCI_DEBUG_REGS
+	printf("out16r(0x%lx,0x%04x = 0x%04x)\n", address, val, data);
+#endif
+	*(unsigned short *)(address) = val;
+}
+
+#define out32r(address,data) _out32r((unsigned int)(address), (unsigned int)(data))
+void _out32r(unsigned int address, unsigned int data)
+{
+	unsigned int val = (unsigned int)((((unsigned int)(data) & 0x000000ff)
+					   << 24) | (((unsigned int)(data) &
+						      0x0000ff00) << 8) |
+					  (((unsigned int)(data) & 0x00ff0000)
+					   >> 8) | (((unsigned int)(data) &
+						     0xff000000) >> 24));
+#ifdef UHCI_DEBUG_REGS
+	printf("out32r(0x%lx,0x%lx = 0x%lx)\n", address, val, data);
+#endif
+	*(unsigned int *)address = val;
+}
+
+#define in16r(address) _in16r((unsigned int)(address))
+unsigned short _in16r(unsigned int address)
+{
+	unsigned short val = sparc_load_reg_cachemiss_word(address);
+	val = ((val << 8) & 0xff00) | ((val >> 8) & 0xff);
+#ifdef UHCI_DEBUG_REGS
+	printf("in16r(0x%lx): 0x%04x\n", address, val);
+#endif
+	return val;
+}
+
+#define in32r(address) _in32r((unsigned int)(address))
+unsigned int _in32r(unsigned int address)
+{
+	unsigned int val = sparc_load_reg_cachemiss(address);
+	val =
+	    ((val << 24) & 0xff000000) | ((val << 8) & 0xff0000) | ((val >> 8) &
+								    0xff00) |
+	    ((val >> 24) & 0xff);
+#ifdef UHCI_DEBUG_REGS
+	printf("in32r(0x%lx): 0x%08x\n", address, val);
+#endif
+	return val;
+}
+
+#define READ32(address) sparc_load_reg_cachemiss((unsigned int)(address))
+
+/*#define USB_UHCI_DEBUG*/
+#undef USB_UHCI_DEBUG
+
+void usb_show_td(int max);
+#ifdef	USB_UHCI_DEBUG
+void grusb_show_regs(void);
+#define	USB_UHCI_PRINTF(fmt,args...)	printf (fmt ,##args)
+#else
+#define USB_UHCI_PRINTF(fmt,args...)
+#endif
+
+static int grusb_irq = -1;	/* irq vector, if -1 uhci is stopped / reseted */
+unsigned int usb_base_addr;	/* base address */
+
+static uhci_td_t td_int[8] __attribute__ ((aligned(16)));	/* Interrupt Transfer descriptors */
+static uhci_qh_t qh_cntrl __attribute__ ((aligned(16)));	/* control Queue Head */
+static uhci_qh_t qh_bulk __attribute__ ((aligned(16)));	/*  bulk Queue Head */
+static uhci_qh_t qh_end __attribute__ ((aligned(16)));	/* end Queue Head */
+static uhci_td_t td_last __attribute__ ((aligned(16)));	/* last TD (linked with end chain) */
+
+/* temporary tds */
+static uhci_td_t tmp_td[USB_MAX_TEMP_TD] __attribute__ ((aligned(16)));	/* temporary bulk/control td's  */
+static uhci_td_t tmp_int_td[USB_MAX_TEMP_INT_TD] __attribute__ ((aligned(16)));	/* temporary interrupt td's  */
+
+static unsigned long framelist[1024] __attribute__ ((aligned(0x1000)));	/* frame list */
+
+static struct virt_root_hub rh;	/* struct for root hub */
+
+/**********************************************************************
+ * some forward decleration
+ */
+int uhci_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
+		       void *buffer, int transfer_len,
+		       struct devrequest *setup);
+
+/* fill a td with the approproiate data. Link, status, info and buffer
+ * are used by the USB controller itselfes, dev is used to identify the
+ * "connected" device
+ */
+void usb_fill_td(uhci_td_t * td, unsigned long link, unsigned long status,
+		 unsigned long info, unsigned long buffer, unsigned long dev)
+{
+	td->link = swap_32(link);
+	td->status = swap_32(status);
+	if ((info & UHCI_PID) == 0)
+		info |= USB_PID_OUT;
+	td->info = swap_32(info);
+	td->buffer = swap_32(buffer);
+	td->dev_ptr = dev;
+}
+
+/* fill a qh with the approproiate data. Head and element are used by the USB controller
+ * itselfes. As soon as a valid dev_ptr is filled, a td chain is connected to the qh.
+ * Please note, that after completion of the td chain, the entry element is removed /
+ * marked invalid by the USB controller.
+ */
+void usb_fill_qh(uhci_qh_t * qh, unsigned long head, unsigned long element)
+{
+	qh->head = swap_32(head);
+	qh->element = swap_32(element);
+	qh->dev_ptr = 0L;
+}
+
+/* get the status of a td->status
+ */
+unsigned long usb_uhci_td_stat(unsigned long status)
+{
+	unsigned long result = 0;
+	result |= (status & TD_CTRL_NAK) ? USB_ST_NAK_REC : 0;
+	result |= (status & TD_CTRL_STALLED) ? USB_ST_STALLED : 0;
+	result |= (status & TD_CTRL_DBUFERR) ? USB_ST_BUF_ERR : 0;
+	result |= (status & TD_CTRL_BABBLE) ? USB_ST_BABBLE_DET : 0;
+	result |= (status & TD_CTRL_CRCTIMEO) ? USB_ST_CRC_ERR : 0;
+	result |= (status & TD_CTRL_BITSTUFF) ? USB_ST_BIT_ERR : 0;
+	result |= (status & TD_CTRL_ACTIVE) ? USB_ST_NOT_PROC : 0;
+	return result;
+}
+
+/* get the status and the transfered len of a td chain.
+ * called from the completion handler
+ */
+int usb_get_td_status(uhci_td_t * td, struct usb_device *dev)
+{
+	unsigned long temp, info;
+	unsigned long stat;
+	uhci_td_t *mytd = td;
+
+	if (dev->devnum == rh.devnum)
+		return 0;
+	dev->act_len = 0;
+	stat = 0;
+	do {
+		temp = swap_32((unsigned long)READ32(&mytd->status));
+		stat = usb_uhci_td_stat(temp);
+		info = swap_32((unsigned long)READ32(&mytd->info));
+		if (((info & 0xff) != USB_PID_SETUP) && (((info >> 21) & 0x7ff) != 0x7ff) && (temp & 0x7FF) != 0x7ff) {	/* if not setup and not null data pack */
+			dev->act_len += (temp & 0x7FF) + 1;	/* the transfered len is act_len + 1 */
+		}
+		if (stat) {	/* status no ok */
+			dev->status = stat;
+			return -1;
+		}
+		temp = swap_32((unsigned long)READ32(&mytd->link));
+		mytd = (uhci_td_t *) (temp & 0xfffffff0);
+	} while ((temp & 0x1) == 0);	/* process all TDs */
+	dev->status = stat;
+	return 0;		/* Ok */
+}
+
+/*-------------------------------------------------------------------
+ *                         LOW LEVEL STUFF
+ *          assembles QHs und TDs for control, bulk and iso
+ *-------------------------------------------------------------------*/
+int dummy(void)
+{
+	USB_UHCI_PRINTF("DUMMY\n");
+	return 0;
+}
+
+/* Submits a control message. That is a Setup, Data and Status transfer.
+ * Routine does not wait for completion.
+ */
+int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
+		       int transfer_len, struct devrequest *setup)
+{
+	unsigned long destination, status;
+	int maxsze = usb_maxpacket(dev, pipe);
+	unsigned long dataptr;
+	int len;
+	int pktsze;
+	int i = 0;
+
+	if (!maxsze) {
+		USB_UHCI_PRINTF
+		    ("uhci_submit_control_urb: pipesize for pipe %lx is zero\n",
+		     pipe);
+		return -1;
+	}
+	if (((pipe >> 8) & 0x7f) == rh.devnum) {
+		/* this is the root hub -> redirect it */
+		return uhci_submit_rh_msg(dev, pipe, buffer, transfer_len,
+					  setup);
+	}
+	USB_UHCI_PRINTF("uhci_submit_control start len %x, maxsize %x\n",
+			transfer_len, maxsze);
+	/* The "pipe" thing contains the destination in bits 8--18 */
+	destination = (pipe & PIPE_DEVEP_MASK) | USB_PID_SETUP;	/* Setup stage */
+	/* 3 errors */
+	status = (pipe & TD_CTRL_LS) | TD_CTRL_ACTIVE | (3 << 27);
+	/* (urb->transfer_flags & USB_DISABLE_SPD ? 0 : TD_CTRL_SPD); */
+	/*  Build the TD for the control request, try forever, 8 bytes of data */
+	usb_fill_td(&tmp_td[i], UHCI_PTR_TERM, status, destination | (7 << 21),
+		    (unsigned long)setup, (unsigned long)dev);
+#ifdef DEBUG_EXTRA
+	{
+		char *sp = (char *)setup;
+		printf("SETUP to pipe %lx: %x %x %x %x %x %x %x %x\n", pipe,
+		       sp[0], sp[1], sp[2], sp[3], sp[4], sp[5], sp[6], sp[7]);
+	}
+#endif
+	dataptr = (unsigned long)buffer;
+	len = transfer_len;
+
+	/* If direction is "send", change the frame from SETUP (0x2D)
+	   to OUT (0xE1). Else change it from SETUP to IN (0x69). */
+	destination =
+	    (pipe & PIPE_DEVEP_MASK) | ((pipe & USB_DIR_IN) ==
+					0 ? USB_PID_OUT : USB_PID_IN);
+	while (len > 0) {
+		/* data stage */
+		pktsze = len;
+		i++;
+		if (pktsze > maxsze)
+			pktsze = maxsze;
+		destination ^= 1 << TD_TOKEN_TOGGLE;	/* toggle DATA0/1 */
+		usb_fill_td(&tmp_td[i], UHCI_PTR_TERM, status, destination | ((pktsze - 1) << 21), dataptr, (unsigned long)dev);	/* Status, pktsze bytes of data */
+		tmp_td[i - 1].link = swap_32((unsigned long)&tmp_td[i]);
+
+		dataptr += pktsze;
+		len -= pktsze;
+	}
+
+	/*  Build the final TD for control status */
+	/* It's only IN if the pipe is out AND we aren't expecting data */
+
+	destination &= ~UHCI_PID;
+	if (((pipe & USB_DIR_IN) == 0) || (transfer_len == 0))
+		destination |= USB_PID_IN;
+	else
+		destination |= USB_PID_OUT;
+	destination |= 1 << TD_TOKEN_TOGGLE;	/* End in Data1 */
+	i++;
+	status &= ~TD_CTRL_SPD;
+	/* no limit on errors on final packet , 0 bytes of data */
+	usb_fill_td(&tmp_td[i], UHCI_PTR_TERM, status | TD_CTRL_IOC,
+		    destination | (UHCI_NULL_DATA_SIZE << 21), 0,
+		    (unsigned long)dev);
+	tmp_td[i - 1].link = swap_32((unsigned long)&tmp_td[i]);	/* queue status td */
+	/* usb_show_td(i+1); */
+	USB_UHCI_PRINTF("uhci_submit_control end (%d tmp_tds used)\n", i);
+	/* first mark the control QH element terminated */
+	qh_cntrl.element = 0xffffffffL;
+	/* set qh active */
+	qh_cntrl.dev_ptr = (unsigned long)dev;
+	/* fill in tmp_td_chain */
+	dummy();
+	qh_cntrl.element = swap_32((unsigned long)&tmp_td[0]);
+	return 0;
+}
+
+/*-------------------------------------------------------------------
+ * Prepare TDs for bulk transfers.
+ */
+int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
+		    int transfer_len)
+{
+	unsigned long destination, status, info;
+	unsigned long dataptr;
+	int maxsze = usb_maxpacket(dev, pipe);
+	int len;
+	int i = 0;
+
+	if (transfer_len < 0) {
+		printf("Negative transfer length in submit_bulk\n");
+		return -1;
+	}
+	if (!maxsze)
+		return -1;
+	/* The "pipe" thing contains the destination in bits 8--18. */
+	destination = (pipe & PIPE_DEVEP_MASK) | usb_packetid(pipe);
+	/* 3 errors */
+	status = (pipe & TD_CTRL_LS) | TD_CTRL_ACTIVE | (3 << 27);
+	/*      ((urb->transfer_flags & USB_DISABLE_SPD) ? 0 : TD_CTRL_SPD) | (3 << 27); */
+	/* Build the TDs for the bulk request */
+	len = transfer_len;
+	dataptr = (unsigned long)buffer;
+	do {
+		int pktsze = len;
+		if (pktsze > maxsze)
+			pktsze = maxsze;
+		/* pktsze bytes of data  */
+		info =
+		    destination | (((pktsze - 1) & UHCI_NULL_DATA_SIZE) << 21) |
+		    (usb_gettoggle
+		     (dev, usb_pipeendpoint(pipe),
+		      usb_pipeout(pipe)) << TD_TOKEN_TOGGLE);
+
+		if ((len - pktsze) == 0)
+			status |= TD_CTRL_IOC;	/* last one generates INT */
+
+		usb_fill_td(&tmp_td[i], UHCI_PTR_TERM, status, info, dataptr, (unsigned long)dev);	/* Status, pktsze bytes of data */
+		if (i > 0)
+			tmp_td[i - 1].link = swap_32((unsigned long)&tmp_td[i]);
+		i++;
+		dataptr += pktsze;
+		len -= pktsze;
+		usb_dotoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
+	} while (len > 0);
+	/* first mark the bulk QH element terminated */
+	qh_bulk.element = 0xffffffffL;
+	/* set qh active */
+	qh_bulk.dev_ptr = (unsigned long)dev;
+	/* fill in tmp_td_chain */
+	qh_bulk.element = swap_32((unsigned long)&tmp_td[0]);
+	return 0;
+}
+
+/* search a free interrupt td
+ */
+uhci_td_t *uhci_alloc_int_td(void)
+{
+	int i;
+	for (i = 0; i < USB_MAX_TEMP_INT_TD; i++) {
+		if (tmp_int_td[i].dev_ptr == 0)	/* no device assigned -> free TD */
+			return &tmp_int_td[i];
+	}
+	return NULL;
+}
+
+/*-------------------------------------------------------------------
+ * submits USB interrupt (ie. polling ;-)
+ */
+int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
+		   int transfer_len, int interval)
+{
+	int nint, n;
+	unsigned long status, destination;
+	unsigned long info, tmp;
+	uhci_td_t *mytd;
+	if (interval < 0 || interval >= 256)
+		return -1;
+
+	if (interval == 0)
+		nint = 0;
+	else {
+		for (nint = 0, n = 1; nint <= 8; nint++, n += n) {	/* round interval down to 2^n */
+			if (interval < n) {
+				interval = n / 2;
+				break;
+			}
+		}
+		nint--;
+	}
+
+	USB_UHCI_PRINTF("Rounded interval to %i, chain  %i\n", interval, nint);
+	mytd = uhci_alloc_int_td();
+	if (mytd == NULL) {
+		printf("No free INT TDs found\n");
+		return -1;
+	}
+	status = (pipe & TD_CTRL_LS) | TD_CTRL_ACTIVE | TD_CTRL_IOC | (3 << 27);
+/*		(urb->transfer_flags & USB_DISABLE_SPD ? 0 : TD_CTRL_SPD) | (3 << 27);
+*/
+
+	destination =
+	    (pipe & PIPE_DEVEP_MASK) | usb_packetid(pipe) |
+	    (((transfer_len - 1) & 0x7ff) << 21);
+
+	info =
+	    destination |
+	    (usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe)) <<
+	     TD_TOKEN_TOGGLE);
+	tmp = swap_32(td_int[nint].link);
+	usb_fill_td(mytd, tmp, status, info, (unsigned long)buffer,
+		    (unsigned long)dev);
+	/* Link it */
+	tmp = swap_32((unsigned long)mytd);
+	td_int[nint].link = tmp;
+
+	usb_dotoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
+
+	return 0;
+}
+
+/**********************************************************************
+ * Low Level functions
+ */
+
+void reset_hc(void)
+{
+
+	/* Global reset for 100ms */
+	out16r(usb_base_addr + USBPORTSC1, 0x0204);
+	out16r(usb_base_addr + USBPORTSC2, 0x0204);
+	out16r(usb_base_addr + USBCMD, USBCMD_GRESET | USBCMD_RS);
+	/* Turn off all interrupts */
+	out16r(usb_base_addr + USBINTR, 0);
+	wait_ms(50);
+	out16r(usb_base_addr + USBCMD, 0);
+	wait_ms(10);
+}
+
+void start_hc(void)
+{
+	int timeout = 1000;
+
+	while (in16r(usb_base_addr + USBCMD) & USBCMD_HCRESET) {
+		if (!--timeout) {
+			printf("USBCMD_HCRESET timed out!\n");
+			break;
+		}
+	}
+	/* Turn on all interrupts */
+	out16r(usb_base_addr + USBINTR,
+	       USBINTR_TIMEOUT | USBINTR_RESUME | USBINTR_IOC | USBINTR_SP);
+	/* Start at frame 0 */
+	out16r(usb_base_addr + USBFRNUM, 0);
+	/* set Framebuffer base address */
+	out32r(usb_base_addr + USBFLBASEADD, (unsigned long)&framelist);
+	/* Run and mark it configured with a 64-byte max packet */
+	out16r(usb_base_addr + USBCMD, USBCMD_RS | USBCMD_CF | USBCMD_MAXP);
+}
+
+/* Initialize the skeleton
+ */
+void usb_init_skel(void)
+{
+	unsigned long temp;
+	int n;
+
+	for (n = 0; n < USB_MAX_TEMP_INT_TD; n++)
+		tmp_int_td[n].dev_ptr = 0L;	/* no devices connected */
+	/* last td */
+	usb_fill_td(&td_last, UHCI_PTR_TERM, TD_CTRL_IOC, USB_PID_OUT, 0, 0L);
+	/* usb_fill_td(&td_last,UHCI_PTR_TERM,0,0,0); */
+	/* End Queue Header */
+	usb_fill_qh(&qh_end, UHCI_PTR_TERM, (unsigned long)&td_last);
+	/* Bulk Queue Header */
+	temp = (unsigned long)&qh_end;
+	usb_fill_qh(&qh_bulk, temp | UHCI_PTR_QH, UHCI_PTR_TERM);
+	/* Control Queue Header */
+	temp = (unsigned long)&qh_bulk;
+	usb_fill_qh(&qh_cntrl, temp | UHCI_PTR_QH, UHCI_PTR_TERM);
+	/* 1ms Interrupt td */
+	temp = (unsigned long)&qh_cntrl;
+	usb_fill_td(&td_int[0], temp | UHCI_PTR_QH, 0, USB_PID_OUT, 0, 0L);
+	temp = (unsigned long)&td_int[0];
+	for (n = 1; n < 8; n++)
+		usb_fill_td(&td_int[n], temp, 0, USB_PID_OUT, 0, 0L);
+	for (n = 0; n < 1024; n++) {
+		/* link all framelist pointers to one of the interrupts */
+		int m, o;
+		if ((n & 127) == 127)
+			framelist[n] = swap_32((unsigned long)&td_int[0]);
+		else
+			for (o = 1, m = 2; m <= 128; o++, m += m)
+				if ((n & (m - 1)) == ((m - 1) / 2))
+					framelist[n] =
+					    swap_32((unsigned long)&td_int[o]);
+
+	}
+}
+
+/* check the common skeleton for completed transfers, and update the status
+ * of the "connected" device. Called from the IRQ routine.
+ */
+void usb_check_skel(void)
+{
+	struct usb_device *dev;
+	/* start with the control qh */
+	if (qh_cntrl.dev_ptr != 0) {	/* it's a device assigned check if this caused IRQ */
+		dev = (struct usb_device *)qh_cntrl.dev_ptr;
+		/* Flush cache now that hardware updated DATA and TDs/QHs */
+		if (!leon3_snooping_avail)
+			sparc_dcache_flush_all();
+		usb_get_td_status(&tmp_td[0], dev);	/* update status */
+		if (!(dev->status & USB_ST_NOT_PROC)) {	/* is not active anymore, disconnect devices */
+			qh_cntrl.dev_ptr = 0;
+		}
+	}
+	/* now process the bulk */
+	if (qh_bulk.dev_ptr != 0) {	/* it's a device assigned check if this caused IRQ */
+		dev = (struct usb_device *)qh_bulk.dev_ptr;
+		/* Flush cache now that hardware updated DATA and TDs/QHs */
+		if (!leon3_snooping_avail)
+			sparc_dcache_flush_all();
+		usb_get_td_status(&tmp_td[0], dev);	/* update status */
+		if (!(dev->status & USB_ST_NOT_PROC)) {	/* is not active anymore, disconnect devices */
+			qh_bulk.dev_ptr = 0;
+		}
+	}
+}
+
+/* check the interrupt chain, ubdate the status of the appropriate device,
+ * call the appropriate irqhandler and reactivate the TD if the irqhandler
+ * returns with 1
+ */
+void usb_check_int_chain(void)
+{
+	int i, res;
+	unsigned long link, status;
+	struct usb_device *dev;
+	uhci_td_t *td, *prevtd;
+
+	for (i = 0; i < 8; i++) {
+		prevtd = &td_int[i];	/* the first previous td is the skeleton td */
+		link = swap_32(READ32(&td_int[i].link)) & 0xfffffff0;	/* next in chain */
+		td = (uhci_td_t *) link;	/* assign it */
+		/* all interrupt TDs are finally linked to the td_int[0].
+		 * so we process all until we find the td_int[0].
+		 * if int0 chain points to a QH, we're also done
+		 */
+		while (((i > 0) && (link != (unsigned long)&td_int[0])) ||
+		       ((i == 0)
+			&& !(swap_32(READ32(&td->link)) & UHCI_PTR_QH))) {
+			/* check if a device is assigned with this td */
+			status = swap_32(READ32(&td->status));
+			if ((td->dev_ptr != 0L) && !(status & TD_CTRL_ACTIVE)) {
+				/* td is not active and a device is assigned -> call irqhandler */
+				dev = (struct usb_device *)td->dev_ptr;
+				dev->irq_act_len = ((status & 0x7FF) == 0x7FF) ? 0 : (status & 0x7FF) + 1;	/* transfered length */
+				dev->irq_status = usb_uhci_td_stat(status);	/* get status */
+				res = dev->irq_handle(dev);	/* call irqhandler */
+				if (res == 1) {
+					/* reactivate */
+					status |= TD_CTRL_ACTIVE;
+					td->status = swap_32(status);
+					prevtd = td;	/* previous td = this td */
+				} else {
+					prevtd->link = READ32(&td->link);	/* link previous td directly to the nex td -> unlinked */
+					/* remove device pointer */
+					td->dev_ptr = 0L;
+				}
+			}	/* if we call the irq handler */
+			link = swap_32(READ32(&td->link)) & 0xfffffff0;	/* next in chain */
+			td = (uhci_td_t *) link;	/* assign it */
+		}		/* process all td in this int chain */
+	}			/* next interrupt chain */
+}
+
+/* usb interrupt service routine.
+ */
+void handle_usb_interrupt(void)
+{
+	unsigned short status;
+	static int error = 0;
+
+	/*
+	 * Read the interrupt status, and write it back to clear the
+	 * interrupt cause
+	 */
+
+	status = in16r(usb_base_addr + USBSTS);
+
+	if (!status)		/* shared interrupt, not mine */
+		return;
+	if (status != 1) {
+		/* remove host controller halted state */
+		if ((status & (USBSTS_HCPE | USBSTS_HCH)) ==
+		    (USBSTS_HCPE | USBSTS_HCH)) {
+			/* Stop due to bug in driver, or hardware */
+			out16r(usb_base_addr + USBSTS, status);
+			out16r(usb_base_addr + USBCMD,
+			       USBCMD_HCRESET | USBCMD_GRESET);
+			printf
+			    ("GRUSB: HW detected error(s) in USB Descriptors (STS: 0x%x)\n",
+			     status);
+			usb_show_td(8);
+			return;
+		} else if ((status & 0x20)
+			   && ((in16r(usb_base_addr + USBCMD) & USBCMD_RS) ==
+			       0)) {
+			if (error < 10) {
+				out16r(usb_base_addr + USBCMD,
+				       USBCMD_RS | in16r(usb_base_addr +
+							 USBCMD));
+				error++;
+			}
+		} else
+			error = 0;
+	}
+	usb_check_int_chain();	/* call interrupt handlers for int tds */
+	usb_check_skel();	/* call completion handler for common transfer routines */
+	out16r(usb_base_addr + USBSTS, status);
+}
+
+/* init uhci
+ */
+int usb_lowlevel_init(void)
+{
+	unsigned char temp;
+	ambapp_ahbdev ahbdev;
+
+	/* Find GRUSB core using AMBA Plug&Play information */
+	if (ambapp_ahbslv_first(VENDOR_GAISLER, GAISLER_UHCI, &ahbdev) != 1) {
+		printf("USB UHCI: Failed to find GRUSB controller\n");
+		return -1;
+	}
+	usb_base_addr = ahbdev.address[0];
+	grusb_irq = ahbdev.irq;
+	/*
+	   usb_base_addr = 0xfffa0000;
+	   grusb_irq = 10;
+	 */
+#ifdef USB_UHCI_DEBUG
+	grusb_show_regs();
+#endif
+	memset(td_int, 0, sizeof(td_int));
+	memset(tmp_td, 0, sizeof(tmp_td));
+	memset(tmp_int_td, 0, sizeof(tmp_int_td));
+	memset(&qh_cntrl, 0, sizeof(qh_cntrl));
+	memset(&qh_end, 0, sizeof(qh_end));
+	memset(&td_last, 0, sizeof(td_last));
+
+	irq_free_handler(grusb_irq);
+	USB_UHCI_PRINTF("GRUSB: at 0x%lx irq %d\n", usb_base_addr, grusb_irq);
+	rh.devnum = 0;
+	usb_init_skel();
+	reset_hc();
+	start_hc();
+	irq_install_handler(grusb_irq,
+			    (interrupt_handler_t *) handle_usb_interrupt, NULL);
+	return 0;
+}
+
+/* stop uhci
+ */
+int usb_lowlevel_stop(void)
+{
+	if (grusb_irq == -1)
+		return 1;
+	irq_free_handler(grusb_irq);
+	reset_hc();
+	grusb_irq = -1;
+	return 0;
+}
+
+/*******************************************************************************************
+ * Virtual Root Hub
+ * Since the uhci does not have a real HUB, we simulate one ;-)
+ */
+#undef	USB_RH_DEBUG
+
+#ifdef	USB_RH_DEBUG
+#define	USB_RH_PRINTF(fmt,args...)	printf (fmt ,##args)
+static void usb_display_wValue(unsigned short wValue, unsigned short wIndex);
+static void usb_display_Req(unsigned short req);
+#else
+#define USB_RH_PRINTF(fmt,args...)
+static void usb_display_wValue(unsigned short wValue, unsigned short wIndex)
+{
+}
+static void usb_display_Req(unsigned short req)
+{
+}
+#endif
+
+static unsigned char root_hub_dev_des[] = {
+	0x12,			/*  __u8  bLength; */
+	0x01,			/*  __u8  bDescriptorType; Device */
+	0x00,			/*  __u16 bcdUSB; v1.0 */
+	0x01,
+	0x09,			/*  __u8  bDeviceClass; HUB_CLASSCODE */
+	0x00,			/*  __u8  bDeviceSubClass; */
+	0x00,			/*  __u8  bDeviceProtocol; */
+	0x08,			/*  __u8  bMaxPacketSize0; 8 Bytes */
+	0x00,			/*  __u16 idVendor; */
+	0x00,
+	0x00,			/*  __u16 idProduct; */
+	0x00,
+	0x00,			/*  __u16 bcdDevice; */
+	0x00,
+	0x01,			/*  __u8  iManufacturer; */
+	0x00,			/*  __u8  iProduct; */
+	0x00,			/*  __u8  iSerialNumber; */
+	0x01			/*  __u8  bNumConfigurations; */
+};
+
+/* Configuration descriptor */
+static unsigned char root_hub_config_des[] = {
+	0x09,			/*  __u8  bLength; */
+	0x02,			/*  __u8  bDescriptorType; Configuration */
+	0x19,			/*  __u16 wTotalLength; */
+	0x00,
+	0x01,			/*  __u8  bNumInterfaces; */
+	0x01,			/*  __u8  bConfigurationValue; */
+	0x00,			/*  __u8  iConfiguration; */
+	0x40,			/*  __u8  bmAttributes;
+				   Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup, 4..0: resvd */
+	0x00,			/*  __u8  MaxPower; */
+
+	/* interface */
+	0x09,			/*  __u8  if_bLength; */
+	0x04,			/*  __u8  if_bDescriptorType; Interface */
+	0x00,			/*  __u8  if_bInterfaceNumber; */
+	0x00,			/*  __u8  if_bAlternateSetting; */
+	0x01,			/*  __u8  if_bNumEndpoints; */
+	0x09,			/*  __u8  if_bInterfaceClass; HUB_CLASSCODE */
+	0x00,			/*  __u8  if_bInterfaceSubClass; */
+	0x00,			/*  __u8  if_bInterfaceProtocol; */
+	0x00,			/*  __u8  if_iInterface; */
+
+	/* endpoint */
+	0x07,			/*  __u8  ep_bLength; */
+	0x05,			/*  __u8  ep_bDescriptorType; Endpoint */
+	0x81,			/*  __u8  ep_bEndpointAddress; IN Endpoint 1 */
+	0x03,			/*  __u8  ep_bmAttributes; Interrupt */
+	0x08,			/*  __u16 ep_wMaxPacketSize; 8 Bytes */
+	0x00,
+	0xff			/*  __u8  ep_bInterval; 255 ms */
+};
+
+static unsigned char root_hub_hub_des[] = {
+	0x09,			/*  __u8  bLength; */
+	0x29,			/*  __u8  bDescriptorType; Hub-descriptor */
+	0x02,			/*  __u8  bNbrPorts; */
+	0x00,			/* __u16  wHubCharacteristics; */
+	0x00,
+	0x01,			/*  __u8  bPwrOn2pwrGood; 2ms */
+	0x00,			/*  __u8  bHubContrCurrent; 0 mA */
+	0x00,			/*  __u8  DeviceRemovable; *** 7 Ports max *** */
+	0xff			/*  __u8  PortPwrCtrlMask; *** 7 ports max *** */
+};
+
+static unsigned char root_hub_str_index0[] = {
+	0x04,			/*  __u8  bLength; */
+	0x03,			/*  __u8  bDescriptorType; String-descriptor */
+	0x09,			/*  __u8  lang ID */
+	0x04,			/*  __u8  lang ID */
+};
+
+static unsigned char root_hub_str_index1[] = {
+	28,			/*  __u8  bLength; */
+	0x03,			/*  __u8  bDescriptorType; String-descriptor */
+	'U',			/*  __u8  Unicode */
+	0,			/*  __u8  Unicode */
+	'H',			/*  __u8  Unicode */
+	0,			/*  __u8  Unicode */
+	'C',			/*  __u8  Unicode */
+	0,			/*  __u8  Unicode */
+	'I',			/*  __u8  Unicode */
+	0,			/*  __u8  Unicode */
+	' ',			/*  __u8  Unicode */
+	0,			/*  __u8  Unicode */
+	'R',			/*  __u8  Unicode */
+	0,			/*  __u8  Unicode */
+	'o',			/*  __u8  Unicode */
+	0,			/*  __u8  Unicode */
+	'o',			/*  __u8  Unicode */
+	0,			/*  __u8  Unicode */
+	't',			/*  __u8  Unicode */
+	0,			/*  __u8  Unicode */
+	' ',			/*  __u8  Unicode */
+	0,			/*  __u8  Unicode */
+	'H',			/*  __u8  Unicode */
+	0,			/*  __u8  Unicode */
+	'u',			/*  __u8  Unicode */
+	0,			/*  __u8  Unicode */
+	'b',			/*  __u8  Unicode */
+	0,			/*  __u8  Unicode */
+};
+
+/*
+ * Root Hub Control Pipe (interrupt Pipes are not supported)
+ */
+
+int uhci_submit_rh_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
+		       int transfer_len, struct devrequest *cmd)
+{
+	void *data = buffer;
+	int leni = transfer_len;
+	int len = 0;
+	int status = 0;
+	int stat = 0;
+	int i;
+
+	unsigned short cstatus;
+
+	unsigned short bmRType_bReq;
+	unsigned short wValue;
+	unsigned short wIndex;
+	unsigned short wLength;
+
+	if ((pipe & PIPE_INTERRUPT) == PIPE_INTERRUPT) {
+		printf("Root-Hub submit IRQ: NOT implemented\n");
+		return 0;
+	}
+	bmRType_bReq = cmd->requesttype | cmd->request << 8;
+	wValue = swap_16(cmd->value);
+	wIndex = swap_16(cmd->index);
+	wLength = swap_16(cmd->length);
+	usb_display_Req(bmRType_bReq);
+	for (i = 0; i < 8; i++)
+		rh.c_p_r[i] = 0;
+	USB_RH_PRINTF("Root-Hub: adr: %2x cmd(%1x): %02x%02x %04x %04x %04x\n",
+		      dev->devnum, 8, cmd->requesttype, cmd->request, wValue,
+		      wIndex, wLength);
+
+	switch (bmRType_bReq) {
+		/* Request Destination:
+		   without flags: Device,
+		   RH_INTERFACE: interface,
+		   RH_ENDPOINT: endpoint,
+		   RH_CLASS means HUB here,
+		   RH_OTHER | RH_CLASS  almost ever means HUB_PORT here
+		 */
+
+	case RH_GET_STATUS:
+		*(unsigned short *)data = swap_16(1);
+		len = 2;
+		break;
+	case RH_GET_STATUS | RH_INTERFACE:
+		*(unsigned short *)data = swap_16(0);
+		len = 2;
+		break;
+	case RH_GET_STATUS | RH_ENDPOINT:
+		*(unsigned short *)data = swap_16(0);
+		len = 2;
+		break;
+	case RH_GET_STATUS | RH_CLASS:
+		*(unsigned long *)data = swap_32(0);
+		len = 4;
+		break;		/* hub power ** */
+	case RH_GET_STATUS | RH_OTHER | RH_CLASS:
+
+		status = in16r(usb_base_addr + USBPORTSC1 + 2 * (wIndex - 1));
+		cstatus = ((status & USBPORTSC_CSC) >> (1 - 0)) |
+		    ((status & USBPORTSC_PEC) >> (3 - 1)) |
+		    (rh.c_p_r[wIndex - 1] << (0 + 4));
+		status = (status & USBPORTSC_CCS) | ((status & USBPORTSC_PE) >> (2 - 1)) | ((status & USBPORTSC_SUSP) >> (12 - 2)) | ((status & USBPORTSC_PR) >> (9 - 4)) | (1 << 8) |	/* power on ** */
+		    ((status & USBPORTSC_LSDA) << (-8 + 9));
+
+		*(unsigned short *)data = swap_16(status);
+		*(unsigned short *)(data + 2) = swap_16(cstatus);
+		len = 4;
+		break;
+	case RH_CLEAR_FEATURE | RH_ENDPOINT:
+		switch (wValue) {
+		case (RH_ENDPOINT_STALL):
+			len = 0;
+			break;
+		}
+		break;
+
+	case RH_CLEAR_FEATURE | RH_CLASS:
+		switch (wValue) {
+		case (RH_C_HUB_OVER_CURRENT):
+			len = 0;	/* hub power over current ** */
+			break;
+		}
+		break;
+
+	case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
+		usb_display_wValue(wValue, wIndex);
+		switch (wValue) {
+		case (RH_PORT_ENABLE):
+			status =
+			    in16r(usb_base_addr + USBPORTSC1 +
+				  2 * (wIndex - 1));
+			status = (status & 0xfff5) & ~USBPORTSC_PE;
+			out16r(usb_base_addr + USBPORTSC1 + 2 * (wIndex - 1),
+			       status);
+			len = 0;
+			break;
+		case (RH_PORT_SUSPEND):
+			status =
+			    in16r(usb_base_addr + USBPORTSC1 +
+				  2 * (wIndex - 1));
+			status = (status & 0xfff5) & ~USBPORTSC_SUSP;
+			out16r(usb_base_addr + USBPORTSC1 + 2 * (wIndex - 1),
+			       status);
+			len = 0;
+			break;
+		case (RH_PORT_POWER):
+			len = 0;	/* port power ** */
+			break;
+		case (RH_C_PORT_CONNECTION):
+			status =
+			    in16r(usb_base_addr + USBPORTSC1 +
+				  2 * (wIndex - 1));
+			status = (status & 0xfff5) | USBPORTSC_CSC;
+			out16r(usb_base_addr + USBPORTSC1 + 2 * (wIndex - 1),
+			       status);
+			len = 0;
+			break;
+		case (RH_C_PORT_ENABLE):
+			status =
+			    in16r(usb_base_addr + USBPORTSC1 +
+				  2 * (wIndex - 1));
+			status = (status & 0xfff5) | USBPORTSC_PEC;
+			out16r(usb_base_addr + USBPORTSC1 + 2 * (wIndex - 1),
+			       status);
+			len = 0;
+			break;
+		case (RH_C_PORT_SUSPEND):
+/*** WR_RH_PORTSTAT(RH_PS_PSSC); */
+			len = 0;
+			break;
+		case (RH_C_PORT_OVER_CURRENT):
+			len = 0;
+			break;
+		case (RH_C_PORT_RESET):
+			rh.c_p_r[wIndex - 1] = 0;
+			len = 0;
+			break;
+		}
+		break;
+	case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
+		usb_display_wValue(wValue, wIndex);
+		switch (wValue) {
+		case (RH_PORT_SUSPEND):
+			status =
+			    in16r(usb_base_addr + USBPORTSC1 +
+				  2 * (wIndex - 1));
+			status = (status & 0xfff5) | USBPORTSC_SUSP;
+			out16r(usb_base_addr + USBPORTSC1 + 2 * (wIndex - 1),
+			       status);
+			len = 0;
+			break;
+		case (RH_PORT_RESET):
+			status =
+			    in16r(usb_base_addr + USBPORTSC1 +
+				  2 * (wIndex - 1));
+			status = (status & 0xfff5) | USBPORTSC_PR;
+			out16r(usb_base_addr + USBPORTSC1 + 2 * (wIndex - 1),
+			       status);
+			wait_ms(10);
+			status = (status & 0xfff5) & ~USBPORTSC_PR;
+			out16r(usb_base_addr + USBPORTSC1 + 2 * (wIndex - 1),
+			       status);
+			udelay(10);
+			status = (status & 0xfff5) | USBPORTSC_PE;
+			out16r(usb_base_addr + USBPORTSC1 + 2 * (wIndex - 1),
+			       status);
+			wait_ms(10);
+			status = (status & 0xfff5) | 0xa;
+			out16r(usb_base_addr + USBPORTSC1 + 2 * (wIndex - 1),
+			       status);
+			len = 0;
+			break;
+		case (RH_PORT_POWER):
+			len = 0;	/* port power ** */
+			break;
+		case (RH_PORT_ENABLE):
+			status =
+			    in16r(usb_base_addr + USBPORTSC1 +
+				  2 * (wIndex - 1));
+			status = (status & 0xfff5) | USBPORTSC_PE;
+			out16r(usb_base_addr + USBPORTSC1 + 2 * (wIndex - 1),
+			       status);
+			len = 0;
+			break;
+		}
+		break;
+
+	case RH_SET_ADDRESS:
+		rh.devnum = wValue;
+		len = 0;
+		break;
+	case RH_GET_DESCRIPTOR:
+		switch ((wValue & 0xff00) >> 8) {
+		case (0x01):	/* device descriptor */
+			i = sizeof(root_hub_config_des);
+			status = i > wLength ? wLength : i;
+			len = leni > status ? status : leni;
+			memcpy(data, root_hub_dev_des, len);
+			break;
+		case (0x02):	/* configuration descriptor */
+			i = sizeof(root_hub_config_des);
+			status = i > wLength ? wLength : i;
+			len = leni > status ? status : leni;
+			memcpy(data, root_hub_config_des, len);
+			break;
+		case (0x03):	/*string descriptors */
+			if (wValue == 0x0300) {
+				i = sizeof(root_hub_str_index0);
+				status = i > wLength ? wLength : i;
+				len = leni > status ? status : leni;
+				memcpy(data, root_hub_str_index0, len);
+				break;
+			}
+			if (wValue == 0x0301) {
+				i = sizeof(root_hub_str_index1);
+				status = i > wLength ? wLength : i;
+				len = leni > status ? status : leni;
+				memcpy(data, root_hub_str_index1, len);
+				break;
+			}
+			stat = USB_ST_STALLED;
+		}
+		break;
+
+	case RH_GET_DESCRIPTOR | RH_CLASS:
+		root_hub_hub_des[2] = 2;
+		i = sizeof(root_hub_hub_des);
+		status = i > wLength ? wLength : i;
+		len = leni > status ? status : leni;
+		memcpy(data, root_hub_hub_des, len);
+		break;
+	case RH_GET_CONFIGURATION:
+		*(unsigned char *)data = 0x01;
+		len = 1;
+		break;
+	case RH_SET_CONFIGURATION:
+		len = 0;
+		break;
+	default:
+		stat = USB_ST_STALLED;
+	}
+	USB_RH_PRINTF("Root-Hub stat %lx port1: %x port2: %x\n\n", stat,
+		      in16r(usb_base_addr + USBPORTSC1),
+		      in16r(usb_base_addr + USBPORTSC2));
+	dev->act_len = len;
+	dev->status = stat;
+	return stat;
+
+}
+
+/********************************************************************************
+ * Some Debug Routines
+ */
+
+#ifdef	USB_RH_DEBUG
+
+static void usb_display_Req(unsigned short req)
+{
+	USB_RH_PRINTF("- Root-Hub Request: ");
+	switch (req) {
+	case RH_GET_STATUS:
+		USB_RH_PRINTF("Get Status ");
+		break;
+	case RH_GET_STATUS | RH_INTERFACE:
+		USB_RH_PRINTF("Get Status Interface ");
+		break;
+	case RH_GET_STATUS | RH_ENDPOINT:
+		USB_RH_PRINTF("Get Status Endpoint ");
+		break;
+	case RH_GET_STATUS | RH_CLASS:
+		USB_RH_PRINTF("Get Status Class");
+		break;		/* hub power ** */
+	case RH_GET_STATUS | RH_OTHER | RH_CLASS:
+		USB_RH_PRINTF("Get Status Class Others");
+		break;
+	case RH_CLEAR_FEATURE | RH_ENDPOINT:
+		USB_RH_PRINTF("Clear Feature Endpoint ");
+		break;
+	case RH_CLEAR_FEATURE | RH_CLASS:
+		USB_RH_PRINTF("Clear Feature Class ");
+		break;
+	case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
+		USB_RH_PRINTF("Clear Feature Other Class ");
+		break;
+	case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
+		USB_RH_PRINTF("Set Feature Other Class ");
+		break;
+	case RH_SET_ADDRESS:
+		USB_RH_PRINTF("Set Address ");
+		break;
+	case RH_GET_DESCRIPTOR:
+		USB_RH_PRINTF("Get Descriptor ");
+		break;
+	case RH_GET_DESCRIPTOR | RH_CLASS:
+		USB_RH_PRINTF("Get Descriptor Class ");
+		break;
+	case RH_GET_CONFIGURATION:
+		USB_RH_PRINTF("Get Configuration ");
+		break;
+	case RH_SET_CONFIGURATION:
+		USB_RH_PRINTF("Get Configuration ");
+		break;
+	default:
+		USB_RH_PRINTF("****UNKNOWN**** 0x%04X ", req);
+	}
+	USB_RH_PRINTF("\n");
+
+}
+
+static void usb_display_wValue(unsigned short wValue, unsigned short wIndex)
+{
+	switch (wValue) {
+	case (RH_PORT_ENABLE):
+		USB_RH_PRINTF("Root-Hub: Enable Port %d\n", wIndex);
+		break;
+	case (RH_PORT_SUSPEND):
+		USB_RH_PRINTF("Root-Hub: Suspend Port %d\n", wIndex);
+		break;
+	case (RH_PORT_POWER):
+		USB_RH_PRINTF("Root-Hub: Port Power %d\n", wIndex);
+		break;
+	case (RH_C_PORT_CONNECTION):
+		USB_RH_PRINTF("Root-Hub: C Port Connection Port %d\n", wIndex);
+		break;
+	case (RH_C_PORT_ENABLE):
+		USB_RH_PRINTF("Root-Hub: C Port Enable Port %d\n", wIndex);
+		break;
+	case (RH_C_PORT_SUSPEND):
+		USB_RH_PRINTF("Root-Hub: C Port Suspend Port %d\n", wIndex);
+		break;
+	case (RH_C_PORT_OVER_CURRENT):
+		USB_RH_PRINTF("Root-Hub: C Port Over Current Port %d\n",
+			      wIndex);
+		break;
+	case (RH_C_PORT_RESET):
+		USB_RH_PRINTF("Root-Hub: C Port reset Port %d\n", wIndex);
+		break;
+	default:
+		USB_RH_PRINTF("Root-Hub: unknown %x %x\n", wValue, wIndex);
+		break;
+	}
+}
+
+#endif
+
+/*#ifdef	USB_UHCI_DEBUG*/
+
+static int usb_display_td(uhci_td_t * td)
+{
+	unsigned long tmp;
+	int valid;
+
+	printf("TD at %p:\n", td);
+
+	tmp = swap_32(READ32(&td->link));
+	printf("Link points to 0x%08lX, %s first, %s, %s\n", tmp & 0xfffffff0,
+	       ((tmp & 0x4) == 0x4) ? "Depth" : "Breath",
+	       ((tmp & 0x2) == 0x2) ? "QH" : "TD",
+	       ((tmp & 0x1) == 0x1) ? "invalid" : "valid");
+	valid = ((tmp & 0x1) == 0x0);
+	tmp = swap_32(READ32(&td->status));
+	printf
+	    ("     %s %ld Errors %s %s %s \n     %s %s %s %s %s %s\n     Len 0x%lX\n",
+	     (((tmp >> 29) & 0x1) == 0x1) ? "SPD Enable" : "SPD Disable",
+	     ((tmp >> 28) & 0x3),
+	     (((tmp >> 26) & 0x1) == 0x1) ? "Low Speed" : "Full Speed",
+	     (((tmp >> 25) & 0x1) == 0x1) ? "ISO " : "",
+	     (((tmp >> 24) & 0x1) == 0x1) ? "IOC " : "",
+	     (((tmp >> 23) & 0x1) == 0x1) ? "Active " : "Inactive ",
+	     (((tmp >> 22) & 0x1) == 0x1) ? "Stalled" : "",
+	     (((tmp >> 21) & 0x1) == 0x1) ? "Data Buffer Error" : "",
+	     (((tmp >> 20) & 0x1) == 0x1) ? "Babble" : "",
+	     (((tmp >> 19) & 0x1) == 0x1) ? "NAK" : "",
+	     (((tmp >> 18) & 0x1) == 0x1) ? "Bitstuff Error" : "",
+	     (tmp & 0x7ff));
+	tmp = swap_32(READ32(&td->info));
+	printf("     MaxLen 0x%lX\n", ((tmp >> 21) & 0x7FF));
+	printf("     %sEndpoint 0x%lX Dev Addr 0x%lX PID 0x%lX\n",
+	       ((tmp >> 19) & 0x1) == 0x1 ? "TOGGLE " : "", ((tmp >> 15) & 0xF),
+	       ((tmp >> 8) & 0x7F), tmp & 0xFF);
+	tmp = swap_32(READ32(&td->buffer));
+	printf("     Buffer 0x%08lX\n", tmp);
+	printf("     DEV %08lX\n", td->dev_ptr);
+	return valid;
+}
+
+void usb_show_td(int max)
+{
+	int i;
+	if (max > 0) {
+		for (i = 0; i < max; i++) {
+			usb_display_td(&tmp_td[i]);
+		}
+	} else {
+		i = 0;
+		do {
+			printf("tmp_td[%d]\n", i);
+		} while (usb_display_td(&tmp_td[i++]));
+	}
+}
+
+void grusb_show_regs(void)
+{
+	unsigned int tmp;
+
+	tmp = in16r(usb_base_addr + USBCMD);
+	printf(" USBCMD:   0x%04x\n", tmp);
+	tmp = in16r(usb_base_addr + USBSTS);
+	printf(" USBSTS:   0x%04x\n", tmp);
+	tmp = in16r(usb_base_addr + USBINTR);
+	printf(" USBINTR:   0x%04x\n", tmp);
+	tmp = in16r(usb_base_addr + USBFRNUM);
+	printf(" FRNUM:   0x%04x\n", tmp);
+	tmp = in32r(usb_base_addr + USBFLBASEADD);
+	printf(" FLBASEADD:   0x%08x\n", tmp);
+	tmp = in16r(usb_base_addr + USBSOF);
+	printf(" SOFMOD:   0x%04x\n", tmp);
+	tmp = in16r(usb_base_addr + USBPORTSC1);
+	printf(" PORTSC1:   0x%04x\n", tmp);
+}
+
+/*#endif*/
+#endif				/* CONFIG_USB_UHCI */
+
+/* EOF */
diff --git a/cpu/leon3/usb_uhci.h b/cpu/leon3/usb_uhci.h
new file mode 100644
index 0000000..bf572a6
--- /dev/null
+++ b/cpu/leon3/usb_uhci.h
@@ -0,0 +1,184 @@
+/*
+ * (C) Copyright 2001
+ * Denis Peter, MPL AG Switzerland
+ *
+ * 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
+ *
+ * Note: Part of this code has been derived from linux
+ *
+ */
+#ifndef _USB_UHCI_H_
+#define _USB_UHCI_H_
+
+/* Command register */
+#define USBCMD		0
+#define   USBCMD_RS       0x0001	/* Run/Stop */
+#define   USBCMD_HCRESET  0x0002	/* Host reset */
+#define   USBCMD_GRESET   0x0004	/* Global reset */
+#define   USBCMD_EGSM     0x0008	/* Global Suspend Mode */
+#define   USBCMD_FGR      0x0010	/* Force Global Resume */
+#define   USBCMD_SWDBG    0x0020	/* SW Debug mode */
+#define   USBCMD_CF       0x0040	/* Config Flag (sw only) */
+#define   USBCMD_MAXP     0x0080	/* Max Packet (0 = 32, 1 = 64) */
+
+/* Status register */
+#define USBSTS		2
+#define   USBSTS_USBINT   0x0001	/* Interrupt due to IOC */
+#define   USBSTS_ERROR    0x0002	/* Interrupt due to error */
+#define   USBSTS_RD       0x0004	/* Resume Detect */
+#define   USBSTS_HSE      0x0008	/* Host System Error - basically PCI problems */
+#define   USBSTS_HCPE     0x0010	/* Host Controller Process Error - the scripts were buggy */
+#define   USBSTS_HCH      0x0020	/* HC Halted */
+
+/* Interrupt enable register */
+#define USBINTR		4
+#define   USBINTR_TIMEOUT 0x0001	/* Timeout/CRC error enable */
+#define   USBINTR_RESUME  0x0002	/* Resume interrupt enable */
+#define   USBINTR_IOC     0x0004	/* Interrupt On Complete enable */
+#define   USBINTR_SP      0x0008	/* Short packet interrupt enable */
+
+#define USBFRNUM      6
+#define USBFLBASEADD  8
+#define USBSOF        12
+
+/* USB port status and control registers */
+#define USBPORTSC1	16
+#define USBPORTSC2	18
+#define   USBPORTSC_CCS   0x0001	/* Current Connect Status ("device present") */
+#define   USBPORTSC_CSC   0x0002	/* Connect Status Change */
+#define   USBPORTSC_PE    0x0004	/* Port Enable */
+#define   USBPORTSC_PEC   0x0008	/* Port Enable Change */
+#define   USBPORTSC_LS    0x0030	/* Line Status */
+#define   USBPORTSC_RD    0x0040	/* Resume Detect */
+#define   USBPORTSC_LSDA  0x0100	/* Low Speed Device Attached */
+#define   USBPORTSC_PR    0x0200	/* Port Reset */
+#define   USBPORTSC_SUSP  0x1000	/* Suspend */
+
+/* Legacy support register */
+#define USBLEGSUP 0xc0
+#define USBLEGSUP_DEFAULT 0x2000	/* only PIRQ enable set */
+
+#define UHCI_NULL_DATA_SIZE 0x7ff	/* for UHCI controller TD */
+#define UHCI_PID            0xff	/* PID MASK */
+
+#define UHCI_PTR_BITS       0x000F
+#define UHCI_PTR_TERM       0x0001
+#define UHCI_PTR_QH         0x0002
+#define UHCI_PTR_DEPTH      0x0004
+
+/* for TD <status>: */
+#define TD_CTRL_SPD         (1 << 29)	/* Short Packet Detect */
+#define TD_CTRL_C_ERR_MASK  (3 << 27)	/* Error Counter bits */
+#define TD_CTRL_LS          (1 << 26)	/* Low Speed Device */
+#define TD_CTRL_IOS         (1 << 25)	/* Isochronous Select */
+#define TD_CTRL_IOC         (1 << 24)	/* Interrupt on Complete */
+#define TD_CTRL_ACTIVE      (1 << 23)	/* TD Active */
+#define TD_CTRL_STALLED     (1 << 22)	/* TD Stalled */
+#define TD_CTRL_DBUFERR     (1 << 21)	/* Data Buffer Error */
+#define TD_CTRL_BABBLE      (1 << 20)	/* Babble Detected */
+#define TD_CTRL_NAK         (1 << 19)	/* NAK Received */
+#define TD_CTRL_CRCTIMEO    (1 << 18)	/* CRC/Time Out Error */
+#define TD_CTRL_BITSTUFF    (1 << 17)	/* Bit Stuff Error */
+#define TD_CTRL_ACTLEN_MASK 0x7ff	/* actual length, encoded as n - 1 */
+
+#define TD_CTRL_ANY_ERROR	(TD_CTRL_STALLED | TD_CTRL_DBUFERR | \
+				 TD_CTRL_BABBLE | TD_CTRL_CRCTIME | TD_CTRL_BITSTUFF)
+
+#define TD_TOKEN_TOGGLE		19
+
+/* ------------------------------------------------------------------------------------
+   Virtual Root HUB
+   ------------------------------------------------------------------------------------ */
+/* destination of request */
+#define RH_INTERFACE               0x01
+#define RH_ENDPOINT                0x02
+#define RH_OTHER                   0x03
+
+#define RH_CLASS                   0x20
+#define RH_VENDOR                  0x40
+
+/* Requests: bRequest << 8 | bmRequestType */
+#define RH_GET_STATUS           0x0080
+#define RH_CLEAR_FEATURE        0x0100
+#define RH_SET_FEATURE          0x0300
+#define RH_SET_ADDRESS          0x0500
+#define RH_GET_DESCRIPTOR       0x0680
+#define RH_SET_DESCRIPTOR       0x0700
+#define RH_GET_CONFIGURATION    0x0880
+#define RH_SET_CONFIGURATION    0x0900
+#define RH_GET_STATE            0x0280
+#define RH_GET_INTERFACE        0x0A80
+#define RH_SET_INTERFACE        0x0B00
+#define RH_SYNC_FRAME           0x0C80
+/* Our Vendor Specific Request */
+#define RH_SET_EP               0x2000
+
+/* Hub port features */
+#define RH_PORT_CONNECTION         0x00
+#define RH_PORT_ENABLE             0x01
+#define RH_PORT_SUSPEND            0x02
+#define RH_PORT_OVER_CURRENT       0x03
+#define RH_PORT_RESET              0x04
+#define RH_PORT_POWER              0x08
+#define RH_PORT_LOW_SPEED          0x09
+#define RH_C_PORT_CONNECTION       0x10
+#define RH_C_PORT_ENABLE           0x11
+#define RH_C_PORT_SUSPEND          0x12
+#define RH_C_PORT_OVER_CURRENT     0x13
+#define RH_C_PORT_RESET            0x14
+
+/* Hub features */
+#define RH_C_HUB_LOCAL_POWER       0x00
+#define RH_C_HUB_OVER_CURRENT      0x01
+
+#define RH_DEVICE_REMOTE_WAKEUP    0x00
+#define RH_ENDPOINT_STALL          0x01
+
+/* Our Vendor Specific feature */
+#define RH_REMOVE_EP               0x00
+
+#define RH_ACK                     0x01
+#define RH_REQ_ERR                 -1
+#define RH_NACK                    0x00
+
+/* Transfer descriptor structure */
+typedef struct {
+	unsigned long link;	/* next td/qh (LE) */
+	unsigned long status;	/* status of the td */
+	unsigned long info;	/* Max Lenght / Endpoint / device address and PID */
+	unsigned long buffer;	/* pointer to data buffer (LE) */
+	unsigned long dev_ptr;	/* pointer to the assigned device (BE) */
+	unsigned long res[3];	/* reserved (TDs must be 8Byte aligned) */
+} uhci_td_t, *puhci_td_t;
+
+/* Queue Header structure */
+typedef struct {
+	unsigned long head;	/* Next QH (LE) */
+	unsigned long element;	/* Queue element pointer (LE) */
+	unsigned long res[5];	/* reserved */
+	unsigned long dev_ptr;	/* if 0 no tds have been assigned to this qh */
+} uhci_qh_t, *puhci_qh_t;
+
+struct virt_root_hub {
+	int devnum;		/* Address of Root Hub endpoint */
+	int numports;		/* number of ports */
+	int c_p_r[8];		/* C_PORT_RESET */
+};
+
+#endif				/* _USB_UHCI_H_ */
diff --git a/include/ambapp.h b/include/ambapp.h
new file mode 100644
index 0000000..1e49d89
--- /dev/null
+++ b/include/ambapp.h
@@ -0,0 +1,380 @@
+/* Interface for accessing Gaisler AMBA Plug&Play Bus.
+ * The AHB bus can be interfaced with a simpler bus -
+ * the APB bus, also freely available in GRLIB at
+ * www.gaisler.com.
+ *
+ * (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
+ *
+ */
+
+#ifndef __AMBAPP_H__
+#define __AMBAPP_H__
+
+/* Default location of Plug&Play info
+ * normally 0xfffff000 for AHB masters
+ * and 0xfffff800 for AHB slaves.
+ * Normally no need to change this.
+ */
+#define LEON3_IO_AREA 0xfff00000
+#define LEON3_CONF_AREA  0xff000
+#define LEON3_AHB_SLAVE_CONF_AREA (1 << 11)
+
+/* Max devices this software will support */
+#define LEON3_AHB_MASTERS 16
+#define LEON3_AHB_SLAVES 16
+				/*#define LEON3_APB_MASTERS 1*//* Number of APB buses that has Plug&Play */
+#define LEON3_APB_SLAVES 16	/* Total number of APB slaves per APB bus */
+
+/* Vendor codes */
+#define VENDOR_GAISLER       1
+#define VENDOR_PENDER        2
+#define VENDOR_ESA           4
+#define VENDOR_ASTRIUM       6
+#define VENDOR_OPENCHIP      7
+#define VENDOR_OPENCORES     8
+#define VENDOR_CONTRIB       9
+#define VENDOR_EONIC         11
+#define VENDOR_RADIONOR      15
+#define VENDOR_GLEICHMANN    16
+#define VENDOR_MENTA         17
+#define VENDOR_SUN           19
+#define VENDOR_EMBEDDIT      234
+#define VENDOR_CAL           202
+
+/* Gaisler Research device id's */
+#define GAISLER_LEON3    0x003
+#define GAISLER_LEON3DSU 0x004
+#define GAISLER_ETHAHB   0x005
+#define GAISLER_APBMST   0x006
+#define GAISLER_AHBUART  0x007
+#define GAISLER_SRCTRL   0x008
+#define GAISLER_SDCTRL   0x009
+#define GAISLER_APBUART  0x00C
+#define GAISLER_IRQMP    0x00D
+#define GAISLER_AHBRAM   0x00E
+#define GAISLER_GPTIMER  0x011
+#define GAISLER_PCITRG   0x012
+#define GAISLER_PCISBRG  0x013
+#define GAISLER_PCIFBRG  0x014
+#define GAISLER_PCITRACE 0x015
+#define GAISLER_PCIDMA   0x016
+#define GAISLER_AHBTRACE 0x017
+#define GAISLER_ETHDSU   0x018
+#define GAISLER_PIOPORT  0x01A
+#define GAISLER_AHBJTAG  0x01c
+#define GAISLER_SPW      0x01f
+#define GAISLER_ATACTRL  0x024
+#define GAISLER_VGA      0x061
+#define GAISLER_KBD      0X060
+#define GAISLER_ETHMAC   0x01D
+#define GAISLER_DDRSPA   0x025
+#define GAISLER_EHCI     0x026
+#define GAISLER_UHCI     0x027
+#define GAISLER_SPW2     0x029
+#define GAISLER_DDR2SPA  0x02E
+#define GAISLER_AHBSTAT  0x052
+#define GAISLER_FTMCTRL  0x054
+
+#define GAISLER_L2TIME   0xffd	/* internal device: leon2 timer */
+#define GAISLER_L2C      0xffe	/* internal device: leon2compat */
+#define GAISLER_PLUGPLAY 0xfff	/* internal device: plug & play configarea */
+
+/* European Space Agency device id's */
+#define ESA_LEON2        0x2
+#define ESA_MCTRL        0xF
+
+/* Opencores device id's */
+#define OPENCORES_PCIBR  0x4
+#define OPENCORES_ETHMAC 0x5
+
+/* Vendor codes */
+
+/*
+ *
+ * Macros for manipulating Configuration registers
+ *
+ */
+
+#define amba_vendor(x) (((x) >> 24) & 0xff)
+
+#define amba_device(x) (((x) >> 12) & 0xfff)
+
+#define amba_membar_start(mbar) \
+ (((mbar) & 0xfff00000) & (((mbar) & 0xfff0) << 16))
+
+#define amba_iobar_start(base, iobar) \
+ ((base) | ((((iobar) & 0xfff00000)>>12) & (((iobar) & 0xfff0)<<4)) )
+
+#define amba_irq(conf) ((conf) & 0xf)
+
+#define amba_ver(conf) (((conf)>>5) & 0x1f)
+
+#define amba_membar_type(mbar) ((mbar) & 0xf)
+
+#define amba_membar_mask(mbar) (((mbar)>>4) & 0xfff)
+
+#define AMBA_TYPE_APBIO 0x1
+#define AMBA_TYPE_MEM   0x2
+#define AMBA_TYPE_AHBIO 0x3
+
+#define AMBA_TYPE_AHBIO_ADDR(addr) (LEON3_IO_AREA | ((addr) >> 12))
+
+#ifndef __ASSEMBLER__
+
+/*
+ *  Types and structure used for AMBA Plug & Play bus scanning
+ */
+
+/* AMBA Plug&Play AHB information layout */
+typedef struct {
+	unsigned int conf;
+	unsigned int userdef[3];
+	unsigned int bars[4];
+} ahbctrl_pp_dev;
+
+/* Prototypes for scanning AMBA Plug&Play bus for AMBA
+ *  i)   AHB Masters
+ *  ii)  AHB Slaves
+ *  iii) APB Slaves (APB MST is a AHB Slave)
+ */
+
+typedef struct {
+	unsigned char irq;
+	unsigned char ver;
+	unsigned int address;
+} ambapp_apbdev;
+
+typedef struct {
+	unsigned char irq;
+	unsigned char ver;
+	unsigned int userdef[3];
+	unsigned int address[4];
+} ambapp_ahbdev;
+
+/* AMBA Plug&Play AHB Masters & Slaves information locations
+ * Max devices is 64 supported by HW, however often only 8
+ * are used.
+ */
+typedef struct {
+	ahbctrl_pp_dev masters[64];
+	ahbctrl_pp_dev slaves[64];
+} ahbctrl_info;
+
+/* AMBA Plug&Play AHB information layout */
+typedef struct {
+	unsigned int conf;
+	unsigned int bar;
+} apbctrl_pp_dev;
+
+/* All functions return the number of found devices
+ * 0 = no devices found
+ */
+
+/****************************** APB SLAVES ******************************/
+int ambapp_apb_count(unsigned int vendor, unsigned int driver);
+
+int ambapp_apb_first(unsigned int vendor,
+		     unsigned int driver, ambapp_apbdev * dev);
+
+int ambapp_apb_next(unsigned int vendor,
+		    unsigned int driver, ambapp_apbdev * dev, int index);
+
+int ambapp_apbs_first(unsigned int vendor,
+		      unsigned int driver, ambapp_apbdev * dev, int max_cnt);
+
+/****************************** AHB MASTERS ******************************/
+int ambapp_ahbmst_count(unsigned int vendor, unsigned int driver);
+
+int ambapp_ahbmst_first(unsigned int vendor,
+			unsigned int driver, ambapp_ahbdev * dev);
+
+int ambapp_ahbmst_next(unsigned int vendor,
+		       unsigned int driver, ambapp_ahbdev * dev, int index);
+
+int ambapp_ahbmsts_first(unsigned int vendor,
+			 unsigned int driver, ambapp_ahbdev * dev, int max_cnt);
+
+/****************************** AHB SLAVES ******************************/
+int ambapp_ahbslv_count(unsigned int vendor, unsigned int driver);
+
+int ambapp_ahbslv_first(unsigned int vendor,
+			unsigned int driver, ambapp_ahbdev * dev);
+
+int ambapp_ahbslv_next(unsigned int vendor,
+		       unsigned int driver, ambapp_ahbdev * dev, int index);
+
+int ambapp_ahbslvs_first(unsigned int vendor,
+			 unsigned int driver, ambapp_ahbdev * dev, int max_cnt);
+
+/*************************** AHB/APB only regs functions *************************
+ * During start up, no memory is available we can use the simplified functions
+ * to get to the memory controller.
+ *
+ * Functions uses no stack/memory, only registers.
+ */
+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);
+
+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,	/* scan for AHB 1=slave, 0=masters */
+				      register int index);
+
+unsigned int ambapp_ahb_get_info(ahbctrl_pp_dev * ahb, int info);
+
+/*************************** AMBA Plug&Play device register MAPS *****************/
+
+/*
+ *  The following defines the bits in the LEON UART Status Registers.
+ */
+
+#define LEON_REG_UART_STATUS_DR   0x00000001	/* Data Ready */
+#define LEON_REG_UART_STATUS_TSE  0x00000002	/* TX Send Register Empty */
+#define LEON_REG_UART_STATUS_THE  0x00000004	/* TX Hold Register Empty */
+#define LEON_REG_UART_STATUS_BR   0x00000008	/* Break Error */
+#define LEON_REG_UART_STATUS_OE   0x00000010	/* RX Overrun Error */
+#define LEON_REG_UART_STATUS_PE   0x00000020	/* RX Parity Error */
+#define LEON_REG_UART_STATUS_FE   0x00000040	/* RX Framing Error */
+#define LEON_REG_UART_STATUS_ERR  0x00000078	/* Error Mask */
+
+/*
+ *  The following defines the bits in the LEON UART Ctrl Registers.
+ */
+
+#define LEON_REG_UART_CTRL_RE     0x00000001	/* Receiver enable */
+#define LEON_REG_UART_CTRL_TE     0x00000002	/* Transmitter enable */
+#define LEON_REG_UART_CTRL_RI     0x00000004	/* Receiver interrupt enable */
+#define LEON_REG_UART_CTRL_TI     0x00000008	/* Transmitter interrupt enable */
+#define LEON_REG_UART_CTRL_PS     0x00000010	/* Parity select */
+#define LEON_REG_UART_CTRL_PE     0x00000020	/* Parity enable */
+#define LEON_REG_UART_CTRL_FL     0x00000040	/* Flow control enable */
+#define LEON_REG_UART_CTRL_LB     0x00000080	/* Loop Back enable */
+#define LEON_REG_UART_CTRL_DBG    (1<<11)	/* Debug Bit used by GRMON */
+
+#define LEON3_GPTIMER_EN 1
+#define LEON3_GPTIMER_RL 2
+#define LEON3_GPTIMER_LD 4
+#define LEON3_GPTIMER_IRQEN 8
+
+/*
+ *  The following defines the bits in the LEON PS/2 Status Registers.
+ */
+
+#define LEON_REG_PS2_STATUS_DR   0x00000001	/* Data Ready */
+#define LEON_REG_PS2_STATUS_PE   0x00000002	/* Parity error */
+#define LEON_REG_PS2_STATUS_FE   0x00000004	/* Framing error */
+#define LEON_REG_PS2_STATUS_KI   0x00000008	/* Keyboard inhibit */
+
+/*
+ *  The following defines the bits in the LEON PS/2 Ctrl Registers.
+ */
+
+#define LEON_REG_PS2_CTRL_RE     0x00000001	/* Receiver enable */
+#define LEON_REG_PS2_CTRL_TE     0x00000002	/* Transmitter enable */
+#define LEON_REG_PS2_CTRL_RI     0x00000004	/* Keyboard receive interrupt  */
+#define LEON_REG_PS2_CTRL_TI     0x00000008	/* Keyboard transmit interrupt */
+
+typedef struct {
+	volatile unsigned int ilevel;
+	volatile unsigned int ipend;
+	volatile unsigned int iforce;
+	volatile unsigned int iclear;
+	volatile unsigned int mstatus;
+	volatile unsigned int notused[11];
+	volatile unsigned int cpu_mask[16];
+	volatile unsigned int cpu_force[16];
+} ambapp_dev_irqmp;
+
+typedef struct {
+	volatile unsigned int data;
+	volatile unsigned int status;
+	volatile unsigned int ctrl;
+	volatile unsigned int scaler;
+} ambapp_dev_apbuart;
+
+typedef struct {
+	volatile unsigned int val;
+	volatile unsigned int rld;
+	volatile unsigned int ctrl;
+	volatile unsigned int unused;
+} ambapp_dev_gptimer_element;
+
+#define LEON3_GPTIMER_CTRL_EN	0x1	/* Timer enable */
+#define LEON3_GPTIMER_CTRL_RS	0x2	/* Timer reStart  */
+#define LEON3_GPTIMER_CTRL_LD	0x4	/* Timer reLoad */
+#define LEON3_GPTIMER_CTRL_IE	0x8	/* interrupt enable */
+#define LEON3_GPTIMER_CTRL_IP	0x10	/* interrupt flag/pending */
+#define LEON3_GPTIMER_CTRL_CH	0x20	/* Chain with previous timer */
+
+typedef struct {
+	volatile unsigned int scalar;
+	volatile unsigned int scalar_reload;
+	volatile unsigned int config;
+	volatile unsigned int unused;
+	volatile ambapp_dev_gptimer_element e[8];
+} ambapp_dev_gptimer;
+
+typedef struct {
+	volatile unsigned int iodata;
+	volatile unsigned int ioout;
+	volatile unsigned int iodir;
+	volatile unsigned int irqmask;
+	volatile unsigned int irqpol;
+	volatile unsigned int irqedge;
+} ambapp_dev_ioport;
+
+typedef struct {
+	volatile unsigned int write;
+	volatile unsigned int dummy;
+	volatile unsigned int txcolor;
+	volatile unsigned int bgcolor;
+} ambapp_dev_textvga;
+
+typedef struct {
+	volatile unsigned int data;
+	volatile unsigned int status;
+	volatile unsigned int ctrl;
+} ambapp_dev_apbps2;
+
+typedef struct {
+	unsigned int mcfg1, mcfg2, mcfg3;
+} ambapp_dev_mctrl;
+
+typedef struct {
+	unsigned int sdcfg;
+} ambapp_dev_sdctrl;
+
+typedef struct {
+	unsigned int cfg1;
+	unsigned int cfg2;
+	unsigned int cfg3;
+} ambapp_dev_ddr2spa;
+
+typedef struct {
+	unsigned int ctrl;
+	unsigned int cfg;
+} ambapp_dev_ddrspa;
+
+#endif
+
+#endif
diff --git a/include/asm-sparc/arch-leon3/asi.h b/include/asm-sparc/arch-leon3/asi.h
new file mode 100644
index 0000000..700b3ca
--- /dev/null
+++ b/include/asm-sparc/arch-leon3/asi.h
@@ -0,0 +1,36 @@
+/* asi.h:  Address Space Identifier values for the LEON3 sparc.
+ *
+ * Copyright (C) 2008 Daniel Hellstrom (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
+ *
+ */
+
+#ifndef _LEON3_ASI_H
+#define _LEON3_ASI_H
+
+#define ASI_CACHEMISS		0x01	/* Force D-Cache miss on load (lda) */
+#define ASI_M_FLUSH_PROBE	0x03	/* MMU Flush/Probe */
+#define ASI_IFLUSH		0x10	/* Flush I-Cache */
+#define ASI_DFLUSH		0x11	/* Flush D-Cache */
+#define ASI_BYPASS		0x1c	/* Bypass MMU (Physical address) */
+#define ASI_MMUFLUSH		0x18	/* FLUSH TLB */
+#define ASI_M_MMUREGS		0x19	/* READ/Write MMU Registers */
+
+#endif	/* _LEON3_ASI_H */
diff --git a/include/asm-sparc/leon.h b/include/asm-sparc/leon.h
new file mode 100644
index 0000000..6036fb5
--- /dev/null
+++ b/include/asm-sparc/leon.h
@@ -0,0 +1,38 @@
+/* LEON Header File select
+ *
+ * (C) Copyright 2007
+ * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com.
+ *
+ * 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
+ *
+ */
+
+#ifndef __ASM_LEON_H__
+#define __ASM_LEON_H__
+
+#if defined(CONFIG_LEON3)
+
+#include <asm/leon3.h>
+
+#else
+
+#error Unknown LEON processor
+
+#endif
+
+/* Common stuff */
+
+#endif
diff --git a/include/asm-sparc/leon3.h b/include/asm-sparc/leon3.h
new file mode 100644
index 0000000..84d0e2e
--- /dev/null
+++ b/include/asm-sparc/leon3.h
@@ -0,0 +1,37 @@
+/* LEON3 header file. LEON3 is a free GPL SOC processor available
+ * at www.gaisler.com.
+ *
+ * (C) Copyright 2007
+ * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com.
+ *
+ * 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
+ *
+ */
+
+#ifndef __LEON3_H__
+#define __LEON3_H__
+
+#ifndef CONFIG_LEON3
+#error Include LEON3 header file only if LEON3 processor
+#endif
+
+/* Not much to define, most is Plug and Play and GRLIB dependent 
+ * not LEON3 dependent. See <ambapp.h> for GRLIB timers, interrupt 
+ * ctrl, memory controllers etc.
+ */
+
+
+#endif
diff --git a/include/asm-sparc/processor.h b/include/asm-sparc/processor.h
index 31b44c5..d518389 100644
--- a/include/asm-sparc/processor.h
+++ b/include/asm-sparc/processor.h
@@ -26,8 +26,15 @@
 
 #include <asm/arch/asi.h>
 
-/* Includeprocessor specific header file here */
+#ifdef CONFIG_LEON
+
+/* All LEON processors supported */
+#include <asm/leon.h>
+
+#else
+/* other processors */
 #error Unknown SPARC Processor
+#endif
 
 #ifndef __ASSEMBLY__
 
