nios: Move cpu/nios/* to arch/nios/cpu/*

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>

9 files changed, 2191 insertions, 0 deletions

diff --git a/arch/nios/cpu/Makefile b/arch/nios/cpu/Makefile
new file mode 100644
index 000000000..ad1745608
--- /dev/null
+++ b/arch/nios/cpu/Makefile
@@ -0,0 +1,48 @@
+#
+# (C) Copyright 2000-2006
+# 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	= traps.o
+COBJS	= cpu.o interrupts.o serial.o asmi.o spi.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
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/arch/nios/cpu/asmi.c b/arch/nios/cpu/asmi.c
new file mode 100644
index 000000000..33553b7ca
--- /dev/null
+++ b/arch/nios/cpu/asmi.c
@@ -0,0 +1,695 @@
+/*
+ * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.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>
+
+#if defined(CONFIG_NIOS_ASMI)
+#include <command.h>
+#include <nios-io.h>
+
+#if !defined(CONFIG_SYS_NIOS_ASMIBASE)
+#error "*** CONFIG_SYS_NIOS_ASMIBASE not defined ***"
+#endif
+
+/*-----------------------------------------------------------------------*/
+#define SHORT_HELP\
+	"asmi    - read/write Cyclone ASMI configuration device.\n"
+
+#define LONG_HELP\
+	"\n"\
+	"asmi erase start [end]\n"\
+	"    - erase sector start or sectors start through end.\n"\
+	"asmi info\n"\
+	"    - display ASMI device information.\n"\
+	"asmi protect on | off\n"\
+	"    - turn device protection on or off.\n"\
+	"asmi read addr offset count\n"\
+	"    - read count bytes from offset to addr.\n"\
+	"asmi write addr offset count\n"\
+	"    - write count bytes to offset from addr.\n"\
+	"asmi verify addr offset count\n"\
+	"    - verify count bytes at offset from addr."
+
+
+/*-----------------------------------------------------------------------*/
+/* Operation codes for serial configuration devices
+ */
+#define ASMI_WRITE_ENA		0x06	/* Write enable */
+#define ASMI_WRITE_DIS		0x04	/* Write disable */
+#define ASMI_READ_STAT		0x05	/* Read status */
+#define ASMI_READ_BYTES		0x03	/* Read bytes */
+#define ASMI_READ_ID		0xab	/* Read silicon id */
+#define ASMI_WRITE_STAT		0x01	/* Write status */
+#define ASMI_WRITE_BYTES	0x02	/* Write bytes */
+#define ASMI_ERASE_BULK		0xc7	/* Erase entire device */
+#define ASMI_ERASE_SECT		0xd8	/* Erase sector */
+
+/* Device status register bits
+ */
+#define ASMI_STATUS_WIP		(1<<0)	/* Write in progress */
+#define ASMI_STATUS_WEL		(1<<1)	/* Write enable latch */
+
+static nios_asmi_t *asmi = (nios_asmi_t *)CONFIG_SYS_NIOS_ASMIBASE;
+
+/***********************************************************************
+ * Device access
+ ***********************************************************************/
+static void asmi_cs (int assert)
+{
+	if (assert) {
+		asmi->control |= NIOS_ASMI_SSO;
+	} else {
+		/* Let all bits shift out */
+		while ((asmi->status & NIOS_ASMI_TMT) == 0)
+			;
+		asmi->control &= ~NIOS_ASMI_SSO;
+	}
+}
+
+static void asmi_tx (unsigned char c)
+{
+	while ((asmi->status & NIOS_ASMI_TRDY) == 0)
+		;
+	asmi->txdata = c;
+}
+
+static int asmi_rx (void)
+{
+	while ((asmi->status & NIOS_ASMI_RRDY) == 0)
+		;
+	return (asmi->rxdata);
+}
+
+static unsigned char bitrev[] = {
+	0x00, 0x08, 0x04, 0x0c, 0x02, 0x0a, 0x06, 0x0e,
+	0x01, 0x09, 0x05, 0x0d, 0x03, 0x0b, 0x07, 0x0f
+};
+
+static unsigned char asmi_bitrev( unsigned char c )
+{
+	unsigned char val;
+
+	val  = bitrev[c>>4];
+	val |= bitrev[c & 0x0f]<<4;
+	return (val);
+}
+
+static void asmi_rcv (unsigned char *dst, int len)
+{
+	while (len--) {
+		asmi_tx (0);
+		*dst++ = asmi_rx ();
+	}
+}
+
+static void asmi_rrcv (unsigned char *dst, int len)
+{
+	while (len--) {
+		asmi_tx (0);
+		*dst++ = asmi_bitrev (asmi_rx ());
+	}
+}
+
+static void asmi_snd (unsigned char *src, int len)
+{
+	while (len--) {
+		asmi_tx (*src++);
+		asmi_rx ();
+	}
+}
+
+static void asmi_rsnd (unsigned char *src, int len)
+{
+	while (len--) {
+		asmi_tx (asmi_bitrev (*src++));
+		asmi_rx ();
+	}
+}
+
+static void asmi_wr_enable (void)
+{
+	asmi_cs (1);
+	asmi_tx (ASMI_WRITE_ENA);
+	asmi_rx ();
+	asmi_cs (0);
+}
+
+static unsigned char asmi_status_rd (void)
+{
+	unsigned char status;
+
+	asmi_cs (1);
+	asmi_tx (ASMI_READ_STAT);
+	asmi_rx ();
+	asmi_tx (0);
+	status = asmi_rx ();
+	asmi_cs (0);
+	return (status);
+}
+
+static void asmi_status_wr (unsigned char status)
+{
+	asmi_wr_enable ();
+	asmi_cs (1);
+	asmi_tx (ASMI_WRITE_STAT);
+	asmi_rx ();
+	asmi_tx (status);
+	asmi_rx ();
+	asmi_cs (0);
+	return;
+}
+
+/***********************************************************************
+ * Device information
+ ***********************************************************************/
+typedef struct asmi_devinfo_t {
+	const char	*name;		/* Device name */
+	unsigned char	id;		/* Device silicon id */
+	unsigned char	size;		/* Total size log2(bytes)*/
+	unsigned char	num_sects;	/* Number of sectors */
+	unsigned char	sz_sect;	/* Sector size log2(bytes) */
+	unsigned char	sz_page;	/* Page size log2(bytes) */
+	unsigned char   prot_mask;	/* Protection mask */
+}asmi_devinfo_t;
+
+static struct asmi_devinfo_t devinfo[] = {
+	{ "EPCS1 ", 0x10, 17, 4, 15, 8, 0x0c },
+	{ "EPCS4 ", 0x12, 19, 8, 16, 8, 0x1c },
+	{ 0, 0, 0, 0, 0, 0 }
+};
+
+static asmi_devinfo_t *asmi_dev_find (void)
+{
+	unsigned char buf[4];
+	unsigned char id;
+	int i;
+	struct asmi_devinfo_t *dev = NULL;
+
+	/* Read silicon id requires 3 "dummy bytes" before it's put
+	 * on the wire.
+	 */
+	buf[0] = ASMI_READ_ID;
+	buf[1] = 0;
+	buf[2] = 0;
+	buf[3] = 0;
+
+	asmi_cs (1);
+	asmi_snd (buf,4);
+	asmi_rcv (buf,1);
+	asmi_cs (0);
+	id = buf[0];
+
+	/* Find the info struct */
+	i = 0;
+	while (devinfo[i].name) {
+		if (id == devinfo[i].id) {
+			dev = &devinfo[i];
+			break;
+		}
+		i++;
+	}
+
+	return (dev);
+}
+
+/***********************************************************************
+ * Misc Utilities
+ ***********************************************************************/
+static unsigned asmi_cfgsz (void)
+{
+	unsigned sz = 0;
+	unsigned char buf[128];
+	unsigned char *p;
+
+	/* Read in the first 128 bytes of the device */
+	buf[0] = ASMI_READ_BYTES;
+	buf[1] = 0;
+	buf[2] = 0;
+	buf[3] = 0;
+
+	asmi_cs (1);
+	asmi_snd (buf,4);
+	asmi_rrcv (buf, sizeof(buf));
+	asmi_cs (0);
+
+	/* Search for the starting 0x6a which is followed by the
+	 * 4-byte 'register' and 4-byte bit-count.
+	 */
+	p = buf;
+	while (p < buf + sizeof(buf)-8) {
+		if ( *p == 0x6a ) {
+			/* Point to bit count and extract */
+			p += 5;
+			sz = *p++;
+			sz |= *p++ << 8;
+			sz |= *p++ << 16;
+			sz |= *p++ << 24;
+			/* Convert to byte count */
+			sz += 7;
+			sz >>= 3;
+		} else if (*p == 0xff) {
+			/* 0xff is ok ... just skip */
+			p++;
+			continue;
+		} else {
+			/* Not 0xff or 0x6a ... something's not
+			 * right ... report 'unknown' (sz=0).
+			 */
+			break;
+		}
+	}
+	return (sz);
+}
+
+static int asmi_erase (unsigned start, unsigned end)
+{
+	unsigned off, sectsz;
+	unsigned char buf[4];
+	struct asmi_devinfo_t *dev = asmi_dev_find ();
+
+	if (!dev || (start>end))
+		return (-1);
+
+	/* Erase the requested sectors. An address is required
+	 * that lies within the requested sector -- we'll just
+	 * use the first address in the sector.
+	 */
+	printf ("asmi erasing sector %d ", start);
+	if (start != end)
+		printf ("to %d ", end);
+	sectsz = (1 << dev->sz_sect);
+	while (start <= end) {
+		off = start * sectsz;
+		start++;
+
+		buf[0] = ASMI_ERASE_SECT;
+		buf[1] = off >> 16;
+		buf[2] = off >> 8;
+		buf[3] = off;
+
+		asmi_wr_enable ();
+		asmi_cs (1);
+		asmi_snd (buf,4);
+		asmi_cs (0);
+
+		printf ("."); /* Some user feedback */
+
+		/* Wait for erase to complete */
+		while (asmi_status_rd() & ASMI_STATUS_WIP)
+			;
+	}
+	printf (" done.\n");
+	return (0);
+}
+
+static int asmi_read (ulong addr, ulong off, ulong cnt)
+{
+	unsigned char buf[4];
+
+	buf[0] = ASMI_READ_BYTES;
+	buf[1] = off >> 16;
+	buf[2] = off >> 8;
+	buf[3] = off;
+
+	asmi_cs (1);
+	asmi_snd (buf,4);
+	asmi_rrcv ((unsigned char *)addr, cnt);
+	asmi_cs (0);
+
+	return (0);
+}
+
+static
+int asmi_write (ulong addr, ulong off, ulong cnt)
+{
+	ulong wrcnt;
+	unsigned pgsz;
+	unsigned char buf[4];
+	struct asmi_devinfo_t *dev = asmi_dev_find ();
+
+	if (!dev)
+		return (-1);
+
+	pgsz = (1<<dev->sz_page);
+	while (cnt) {
+		if (off % pgsz)
+			wrcnt = pgsz - (off % pgsz);
+		else
+			wrcnt = pgsz;
+		wrcnt = (wrcnt > cnt) ? cnt : wrcnt;
+
+		buf[0] = ASMI_WRITE_BYTES;
+		buf[1] = off >> 16;
+		buf[2] = off >> 8;
+		buf[3] = off;
+
+		asmi_wr_enable ();
+		asmi_cs (1);
+		asmi_snd (buf,4);
+		asmi_rsnd ((unsigned char *)addr, wrcnt);
+		asmi_cs (0);
+
+		/* Wait for write to complete */
+		while (asmi_status_rd() & ASMI_STATUS_WIP)
+			;
+
+		cnt -= wrcnt;
+		off += wrcnt;
+		addr += wrcnt;
+	}
+
+	return (0);
+}
+
+static
+int asmi_verify (ulong addr, ulong off, ulong cnt, ulong *err)
+{
+	ulong rdcnt;
+	unsigned char buf[256];
+	unsigned char *start,*end;
+	int i;
+
+	start = end = (unsigned char *)addr;
+	while (cnt) {
+		rdcnt = (cnt>sizeof(buf)) ? sizeof(buf) : cnt;
+		asmi_read ((ulong)buf, off, rdcnt);
+		for (i=0; i<rdcnt; i++) {
+			if (*end != buf[i]) {
+				*err = end - start;
+				return(-1);
+			}
+			end++;
+		}
+		cnt -= rdcnt;
+		off += rdcnt;
+	}
+	return (0);
+}
+
+static int asmi_sect_erased (int sect, unsigned *offset,
+		struct asmi_devinfo_t *dev)
+{
+	unsigned char buf[128];
+	unsigned off, end;
+	unsigned sectsz;
+	int i;
+
+	sectsz = (1 << dev->sz_sect);
+	off = sectsz * sect;
+	end = off + sectsz;
+
+	while (off < end) {
+		asmi_read ((ulong)buf, off, sizeof(buf));
+		for (i=0; i < sizeof(buf); i++) {
+			if (buf[i] != 0xff) {
+				*offset = off + i;
+				return (0);
+			}
+		}
+		off += sizeof(buf);
+	}
+	return (1);
+}
+
+
+/***********************************************************************
+ * Commands
+ ***********************************************************************/
+static
+void do_asmi_info (struct asmi_devinfo_t *dev, int argc, char *argv[])
+{
+	int i;
+	unsigned char stat;
+	unsigned tmp;
+	int erased;
+
+	/* Basic device info */
+	printf ("%s: %d kbytes (%d sectors x %d kbytes,"
+		" %d bytes/page)\n",
+		dev->name, 1 << (dev->size-10),
+		dev->num_sects, 1 << (dev->sz_sect-10),
+		1 << dev->sz_page );
+
+	/* Status -- for now protection is all-or-nothing */
+	stat = asmi_status_rd();
+	printf ("status: 0x%02x (WIP:%d, WEL:%d, PROT:%s)\n",
+		stat,
+		(stat & ASMI_STATUS_WIP) ? 1 : 0,
+	        (stat & ASMI_STATUS_WEL) ? 1 : 0,
+		(stat & dev->prot_mask) ? "on" : "off" );
+
+	/* Configuration  */
+	tmp = asmi_cfgsz ();
+	if (tmp) {
+		printf ("config: 0x%06x (%d) bytes\n", tmp, tmp );
+	} else {
+		printf ("config: unknown\n" );
+	}
+
+	/* Sector info */
+	for (i=0; i<dev->num_sects; i++) {
+		erased = asmi_sect_erased (i, &tmp, dev);
+		printf ("     %d: %06x ",
+			i, i*(1<<dev->sz_sect) );
+		if (erased)
+			printf ("erased\n");
+		else
+			printf ("data @ 0x%06x\n", tmp);
+	}
+
+	return;
+}
+
+static
+void do_asmi_erase (struct asmi_devinfo_t *dev, int argc, char *argv[])
+{
+	unsigned start,end;
+
+	if ((argc < 3) || (argc > 4)) {
+		printf ("USAGE: asmi erase sect [end]\n");
+		return;
+	}
+	if ((asmi_status_rd() & dev->prot_mask) != 0) {
+		printf ( "asmi: device protected.\n");
+		return;
+	}
+
+	start = simple_strtoul (argv[2], NULL, 10);
+	if (argc > 3)
+		end = simple_strtoul (argv[3], NULL, 10);
+	else
+		end = start;
+	if ((start >= dev->num_sects) || (start > end)) {
+		printf ("asmi: invalid sector range: [%d:%d]\n",
+			start, end );
+		return;
+	}
+
+	asmi_erase (start, end);
+
+	return;
+}
+
+static
+void do_asmi_protect (struct asmi_devinfo_t *dev, int argc, char *argv[])
+{
+	unsigned char stat;
+
+	/* For now protection is all-or-nothing to keep things
+	 * simple. The protection bits don't map in a linear
+	 * fashion ... and we would rather protect the bottom
+	 * of the device since it contains the config data and
+	 * leave the top unprotected for app use. But unfortunately
+	 * protection works from top-to-bottom so it does
+	 * really help very much from a software app point-of-view.
+	 */
+	if (argc < 3) {
+		printf ("USAGE: asmi protect on | off\n");
+		return;
+	}
+	if (!dev)
+		return;
+
+	/* Protection on/off is just a matter of setting/clearing
+	 * all protection bits in the status register.
+	 */
+	stat = asmi_status_rd ();
+	if (strcmp ("on", argv[2]) == 0) {
+		stat |= dev->prot_mask;
+	} else if (strcmp ("off", argv[2]) == 0 ) {
+		stat &= ~dev->prot_mask;
+	} else {
+		printf ("asmi: unknown protection: %s\n", argv[2]);
+		return;
+	}
+	asmi_status_wr (stat);
+	return;
+}
+
+static
+void do_asmi_read (struct asmi_devinfo_t *dev, int argc, char *argv[])
+{
+	ulong addr,off,cnt;
+	ulong sz;
+
+	if (argc < 5) {
+		printf ("USAGE: asmi read addr offset count\n");
+		return;
+	}
+
+	sz = 1 << dev->size;
+	addr = simple_strtoul (argv[2], NULL, 16);
+	off  = simple_strtoul (argv[3], NULL, 16);
+	cnt  = simple_strtoul (argv[4], NULL, 16);
+	if (off > sz) {
+		printf ("offset is greater than device size"
+			"... aborting.\n");
+		return;
+	}
+	if ((off + cnt) > sz) {
+		printf ("request exceeds device size"
+			"... truncating.\n");
+		cnt = sz - off;
+	}
+	printf ("asmi: read %08lx <- %06lx (0x%lx bytes)\n",
+			addr, off, cnt);
+	asmi_read (addr, off, cnt);
+
+	return;
+}
+
+static
+void do_asmi_write (struct asmi_devinfo_t *dev, int argc, char *argv[])
+{
+	ulong addr,off,cnt;
+	ulong sz;
+	ulong err;
+
+	if (argc < 5) {
+		printf ("USAGE: asmi write addr offset count\n");
+		return;
+	}
+	if ((asmi_status_rd() & dev->prot_mask) != 0) {
+		printf ( "asmi: device protected.\n");
+		return;
+	}
+
+	sz = 1 << dev->size;
+	addr = simple_strtoul (argv[2], NULL, 16);
+	off  = simple_strtoul (argv[3], NULL, 16);
+	cnt  = simple_strtoul (argv[4], NULL, 16);
+	if (off > sz) {
+		printf ("offset is greater than device size"
+			"... aborting.\n");
+		return;
+	}
+	if ((off + cnt) > sz) {
+		printf ("request exceeds device size"
+			"... truncating.\n");
+		cnt = sz - off;
+	}
+	printf ("asmi: write %08lx -> %06lx (0x%lx bytes)\n",
+			addr, off, cnt);
+	asmi_write (addr, off, cnt);
+	if (asmi_verify (addr, off, cnt, &err) != 0)
+		printf ("asmi: write error at offset %06lx\n", err);
+
+	return;
+}
+
+static
+void do_asmi_verify (struct asmi_devinfo_t *dev, int argc, char *argv[])
+{
+	ulong addr,off,cnt;
+	ulong sz;
+	ulong err;
+
+	if (argc < 5) {
+		printf ("USAGE: asmi verify addr offset count\n");
+		return;
+	}
+
+	sz = 1 << dev->size;
+	addr = simple_strtoul (argv[2], NULL, 16);
+	off  = simple_strtoul (argv[3], NULL, 16);
+	cnt  = simple_strtoul (argv[4], NULL, 16);
+	if (off > sz) {
+		printf ("offset is greater than device size"
+			"... aborting.\n");
+		return;
+	}
+	if ((off + cnt) > sz) {
+		printf ("request exceeds device size"
+			"... truncating.\n");
+		cnt = sz - off;
+	}
+	printf ("asmi: verify %08lx -> %06lx (0x%lx bytes)\n",
+			addr, off, cnt);
+	if (asmi_verify (addr, off, cnt, &err) != 0)
+		printf ("asmi: verify error at offset %06lx\n", err);
+
+	return;
+}
+
+/*-----------------------------------------------------------------------*/
+int do_asmi (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	int len;
+	struct asmi_devinfo_t *dev = asmi_dev_find ();
+
+	if (argc < 2) {
+		printf ("Usage:%s", LONG_HELP);
+		return (0);
+	}
+
+	if (!dev) {
+		printf ("asmi: device not found.\n");
+		return (0);
+	}
+
+	len = strlen (argv[1]);
+	if (strncmp ("info", argv[1], len) == 0) {
+		do_asmi_info ( dev, argc, argv);
+	} else if (strncmp ("erase", argv[1], len) == 0) {
+		do_asmi_erase (dev, argc, argv);
+	} else if (strncmp ("protect", argv[1], len) == 0) {
+		do_asmi_protect (dev, argc, argv);
+	} else if (strncmp ("read", argv[1], len) == 0) {
+		do_asmi_read (dev, argc, argv);
+	} else if (strncmp ("write", argv[1], len) == 0) {
+		do_asmi_write (dev, argc, argv);
+	} else if (strncmp ("verify", argv[1], len) == 0) {
+		do_asmi_verify (dev, argc, argv);
+	} else {
+		printf ("asmi: unknown operation: %s\n", argv[1]);
+	}
+
+	return (0);
+}
+
+/*-----------------------------------------------------------------------*/
+
+
+U_BOOT_CMD( asmi, 5, 0, do_asmi, SHORT_HELP, LONG_HELP );
+
+#endif /* CONFIG_NIOS_ASMI */
diff --git a/arch/nios/cpu/config.mk b/arch/nios/cpu/config.mk
new file mode 100644
index 000000000..f228d7219
--- /dev/null
+++ b/arch/nios/cpu/config.mk
@@ -0,0 +1,24 @@
+#
+# (C) Copyright 2000
+# 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 +=
diff --git a/arch/nios/cpu/cpu.c b/arch/nios/cpu/cpu.c
new file mode 100644
index 000000000..5519e8278
--- /dev/null
+++ b/arch/nios/cpu/cpu.c
@@ -0,0 +1,78 @@
+/*
+ * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.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 <nios.h>
+
+
+int checkcpu (void)
+{
+	unsigned val;
+	unsigned rev_major;
+	unsigned rev_minor;
+	short nregs, hi_limit, lo_limit;
+
+	/* Get cpu version info */
+	val = rdctl (CTL_CPU_ID);
+	puts ("CPU:   ");
+	printf ("%s", (val & 0x00008000) ? "Nios-16 " : "Nios-32 ");
+	rev_major = (val>>12) & 0x07;
+	rev_minor = (val>>4) & 0x0ff;
+	printf ("Rev. %d.%d (0x%04x)", rev_major, rev_minor,
+			val & 0xffff);
+	if (rev_major == 0x08)
+		printf (" [OpenCore (R) Plus]");
+	printf ("\n");
+
+	/* Check register file */
+	val = rdctl (CTL_WVALID);
+	lo_limit = val & 0x01f;
+	hi_limit = (val>>5) & 0x1f;
+	nregs = (hi_limit + 2) * 16;
+	printf ("Reg file size: %d LO_LIMIT/HI_LIMIT: %d/%d\n",
+		nregs, lo_limit, hi_limit);
+
+	return (0);
+}
+
+
+int do_reset (void)
+{
+	/* trap 0 does the trick ... at least with the OCI debug
+	 * present -- haven't tested without it yet (stm).
+	 */
+	disable_interrupts ();
+	ipri (1);
+	asm volatile ("trap 0\n");
+
+	/* No return ;-) */
+
+	return(0);
+}
+
+
+#if defined(CONFIG_WATCHDOG)
+void watchdog_reset (void)
+{
+}
+#endif /* CONFIG_WATCHDOG */
diff --git a/arch/nios/cpu/interrupts.c b/arch/nios/cpu/interrupts.c
new file mode 100644
index 000000000..55a571857
--- /dev/null
+++ b/arch/nios/cpu/interrupts.c
@@ -0,0 +1,196 @@
+/*
+ * (C) Copyright 2000-2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.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 <nios.h>
+#include <nios-io.h>
+#include <asm/ptrace.h>
+#include <common.h>
+#include <command.h>
+#include <watchdog.h>
+#ifdef CONFIG_STATUS_LED
+#include <status_led.h>
+#endif
+
+/****************************************************************************/
+
+struct	irq_action {
+	interrupt_handler_t *handler;
+	void *arg;
+	int count;
+};
+
+static struct irq_action irq_vecs[64];
+
+/*************************************************************************/
+volatile ulong timestamp = 0;
+
+void reset_timer (void)
+{
+	timestamp = 0;
+}
+
+ulong get_timer (ulong base)
+{
+	WATCHDOG_RESET ();
+	return (timestamp - base);
+}
+
+void set_timer (ulong t)
+{
+	timestamp = t;
+}
+
+
+/* The board must handle this interrupt if a timer is not
+ * provided.
+ */
+#if defined(CONFIG_SYS_NIOS_TMRBASE)
+void timer_interrupt (struct pt_regs *regs)
+{
+	/* Interrupt is cleared by writing anything to the
+	 * status register.
+	 */
+	nios_timer_t *tmr = (nios_timer_t *)CONFIG_SYS_NIOS_TMRBASE;
+	tmr->status = 0;
+	timestamp += CONFIG_SYS_NIOS_TMRMS;
+#ifdef CONFIG_STATUS_LED
+	status_led_tick(timestamp);
+#endif
+}
+#endif
+
+/*************************************************************************/
+int disable_interrupts (void)
+{
+	int val = 0;
+
+	/* Writing anything to CLR_IE disables interrupts */
+	val = rdctl (CTL_STATUS);
+	wrctl (CTL_CLR_IE, 0);
+	return (val & STATUS_IE);
+}
+
+void enable_interrupts( void )
+{
+	/* Writing anything SET_IE enables interrupts */
+	wrctl (CTL_SET_IE, 0);
+}
+
+void external_interrupt (struct pt_regs *regs)
+{
+	unsigned vec;
+
+	vec = (regs->status & STATUS_IPRI) >> 9;	/* ipri */
+
+	irq_vecs[vec].count++;
+	if (irq_vecs[vec].handler != NULL) {
+		(*irq_vecs[vec].handler)(irq_vecs[vec].arg);
+	} else {
+		/* A sad side-effect of masking a bogus interrupt is
+		 * that lower priority interrupts will also be disabled.
+		 * This is probably not what we want ... so hang insted.
+		 */
+		printf ("Unhandled interrupt: 0x%x\n", vec);
+		disable_interrupts ();
+		hang ();
+	}
+}
+
+/*************************************************************************/
+int interrupt_init (void)
+{
+	int vec;
+
+#if defined(CONFIG_SYS_NIOS_TMRBASE)
+	nios_timer_t *tmr = (nios_timer_t *)CONFIG_SYS_NIOS_TMRBASE;
+
+	tmr->control &= ~NIOS_TIMER_ITO;
+	tmr->control |= NIOS_TIMER_STOP;
+#if defined(CONFIG_SYS_NIOS_TMRCNT)
+	tmr->periodl = CONFIG_SYS_NIOS_TMRCNT & 0xffff;
+	tmr->periodh = (CONFIG_SYS_NIOS_TMRCNT >> 16) & 0xffff;
+#endif
+#endif
+
+	for (vec=0; vec<64; vec++ ) {
+		irq_vecs[vec].handler = NULL;
+		irq_vecs[vec].arg = NULL;
+		irq_vecs[vec].count = 0;
+	}
+
+	/* Need timus interruptus -- start the lopri timer */
+#if defined(CONFIG_SYS_NIOS_TMRBASE)
+	tmr->control |= ( NIOS_TIMER_ITO |
+			  NIOS_TIMER_CONT |
+			  NIOS_TIMER_START );
+	ipri (CONFIG_SYS_NIOS_TMRIRQ + 1);
+#endif
+	enable_interrupts ();
+	return (0);
+}
+
+void irq_install_handler (int vec, interrupt_handler_t *handler, void *arg)
+{
+	struct irq_action *irqa = irq_vecs;
+	int   i = vec;
+	int flag;
+
+	if (irqa[i].handler != NULL) {
+		printf ("Interrupt vector %d: handler 0x%x "
+			"replacing 0x%x\n",
+			vec, (uint)handler, (uint)irqa[i].handler);
+	}
+
+	flag = disable_interrupts ();
+	irqa[i].handler = handler;
+	irqa[i].arg = arg;
+	if (flag )
+		enable_interrupts ();
+}
+
+/*************************************************************************/
+#if defined(CONFIG_CMD_IRQ)
+int do_irqinfo (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	int vec;
+
+	printf ("\nInterrupt-Information:\n");
+	printf ("Nr  Routine   Arg       Count\n");
+
+	for (vec=0; vec<64; vec++) {
+		if (irq_vecs[vec].handler != NULL) {
+			printf ("%02d  %08lx  %08lx  %d\n",
+				vec,
+				(ulong)irq_vecs[vec].handler<<1,
+				(ulong)irq_vecs[vec].arg,
+				irq_vecs[vec].count);
+		}
+	}
+
+	return (0);
+}
+#endif
diff --git a/arch/nios/cpu/serial.c b/arch/nios/cpu/serial.c
new file mode 100644
index 000000000..44aa6001f
--- /dev/null
+++ b/arch/nios/cpu/serial.c
@@ -0,0 +1,135 @@
+/*
+ * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.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 <nios-io.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*------------------------------------------------------------------
+ * JTAG acts as the serial port
+ *-----------------------------------------------------------------*/
+#if defined(CONFIG_CONSOLE_JTAG)
+
+static nios_jtag_t *jtag = (nios_jtag_t *)CONFIG_SYS_NIOS_CONSOLE;
+
+void serial_setbrg( void ){ return; }
+int serial_init( void ) { return(0);}
+
+void serial_putc (char c)
+{
+	while ((jtag->txcntl & NIOS_JTAG_TRDY) != 0)
+		WATCHDOG_RESET ();
+	jtag->txcntl = NIOS_JTAG_TRDY | (unsigned char)c;
+}
+
+void serial_puts (const char *s)
+{
+	while (*s != 0)
+		serial_putc (*s++);
+}
+
+int serial_tstc (void)
+{
+	return (jtag->rxcntl & NIOS_JTAG_RRDY);
+}
+
+int serial_getc (void)
+{
+	int c;
+	while (serial_tstc() == 0)
+		WATCHDOG_RESET ();
+	c = jtag->rxcntl & 0x0ff;
+	jtag->rxcntl = 0;
+	return (c);
+}
+
+/*------------------------------------------------------------------
+ * UART the serial port
+ *-----------------------------------------------------------------*/
+#else
+
+static nios_uart_t *uart = (nios_uart_t *)CONFIG_SYS_NIOS_CONSOLE;
+
+#if defined(CONFIG_SYS_NIOS_FIXEDBAUD)
+
+/* Everything's already setup for fixed-baud PTF
+ * assignment
+ */
+void serial_setbrg (void){ return; }
+int serial_init (void) { return (0);}
+
+#else
+
+void serial_setbrg (void)
+{
+	unsigned div;
+
+	div = (CONFIG_SYS_CLK_FREQ/gd->baudrate)-1;
+	uart->divisor = div;
+	return;
+}
+
+int serial_init (void)
+{
+	serial_setbrg ();
+	return (0);
+}
+
+#endif /* CONFIG_SYS_NIOS_FIXEDBAUD */
+
+
+/*-----------------------------------------------------------------------
+ * UART CONSOLE
+ *---------------------------------------------------------------------*/
+void serial_putc (char c)
+{
+	if (c == '\n')
+		serial_putc ('\r');
+	while ((uart->status & NIOS_UART_TRDY) == 0)
+		WATCHDOG_RESET ();
+	uart->txdata = (unsigned char)c;
+}
+
+void serial_puts (const char *s)
+{
+	while (*s != 0) {
+		serial_putc (*s++);
+	}
+}
+
+int serial_tstc (void)
+{
+	return (uart->status & NIOS_UART_RRDY);
+}
+
+int serial_getc (void)
+{
+	while (serial_tstc () == 0)
+		WATCHDOG_RESET ();
+	return( uart->rxdata & 0x00ff );
+}
+
+#endif /* CONFIG_JTAG_CONSOLE */
diff --git a/arch/nios/cpu/spi.c b/arch/nios/cpu/spi.c
new file mode 100644
index 000000000..89f9797fa
--- /dev/null
+++ b/arch/nios/cpu/spi.c
@@ -0,0 +1,195 @@
+/*
+ * (C) Copyright 2004, Li-Pro.Net <www.li-pro.net>
+ * Stephan Linz <linz@li-pro.net>
+ *
+ * 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 <linux/ctype.h>
+
+#if defined(CONFIG_NIOS_SPI)
+#include <nios-io.h>
+#include <spi.h>
+
+#if !defined(CONFIG_SYS_NIOS_SPIBASE)
+#error "*** CONFIG_SYS_NIOS_SPIBASE not defined ***"
+#endif
+
+#if !defined(CONFIG_SYS_NIOS_SPIBITS)
+#error "*** CONFIG_SYS_NIOS_SPIBITS not defined ***"
+#endif
+
+#if (CONFIG_SYS_NIOS_SPIBITS != 8) && (CONFIG_SYS_NIOS_SPIBITS != 16)
+#error "*** CONFIG_SYS_NIOS_SPIBITS should be either 8 or 16 ***"
+#endif
+
+static nios_spi_t	*spi	= (nios_spi_t *)CONFIG_SYS_NIOS_SPIBASE;
+
+/* Warning:
+ * You cannot enable DEBUG for early system initalization, i. e. when
+ * this driver is used to read environment parameters like "baudrate"
+ * from EEPROM which are used to initialize the serial port which is
+ * needed to print the debug messages...
+ */
+#undef	DEBUG
+
+#ifdef  DEBUG
+
+#define	DPRINT(a)	printf a;
+/* -----------------------------------------------
+ * Helper functions to peek into tx and rx buffers
+ * ----------------------------------------------- */
+static const char * const hex_digit = "0123456789ABCDEF";
+
+static char quickhex (int i)
+{
+	return hex_digit[i];
+}
+
+static void memdump (const void *pv, int num)
+{
+	int i;
+	const unsigned char *pc = (const unsigned char *) pv;
+
+	for (i = 0; i < num; i++)
+		printf ("%c%c ", quickhex (pc[i] >> 4), quickhex (pc[i] & 0x0f));
+	printf ("\t");
+	for (i = 0; i < num; i++)
+		printf ("%c", isprint (pc[i]) ? pc[i] : '.');
+	printf ("\n");
+}
+#else   /* !DEBUG */
+
+#define	DPRINT(a)
+#define	memdump(p,n)
+
+#endif  /* DEBUG */
+
+
+struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
+		unsigned int max_hz, unsigned int mode)
+{
+	struct spi_slave *slave;
+
+	if (!spi_cs_is_valid(bus, cs))
+		return NULL;
+
+	slave = malloc(sizeof(struct spi_slave));
+	if (!slave)
+		return NULL;
+
+	slave->bus = bus;
+	slave->cs = cs;
+
+	/* TODO: Add support for different modes and speeds */
+
+	return slave;
+}
+
+void spi_free_slave(struct spi_slave *slave)
+{
+	free(slave);
+}
+
+int spi_claim_bus(struct spi_slave *slave)
+{
+	return 0;
+}
+
+void spi_release_bus(struct spi_slave *slave)
+{
+
+}
+
+/*
+ * SPI transfer:
+ *
+ * See include/spi.h and http://www.altera.com/literature/ds/ds_nios_spi.pdf
+ * for more informations.
+ */
+int spi_xfer(struct spi_slave *slave, int bitlen, const void *dout,
+		void *din, unsigned long flags)
+{
+	const u8 *txd = dout;
+	u8 *rxd = din;
+	int j;
+
+	DPRINT(("spi_xfer: slave %u:%u dout %08X din %08X bitlen %d\n",
+		slave->bus, slave->cs, *(uint *)dout, *(uint *)din, bitlen));
+
+	memdump(dout, (bitlen + 7) / 8);
+
+	if (flags & SPI_XFER_BEGIN)
+		spi_cs_activate(slave);
+
+	if (!(flags & SPI_XFER_END) || bitlen > CONFIG_SYS_NIOS_SPIBITS) {
+		/* leave chip select active */
+		spi->control |= NIOS_SPI_SSO;
+	}
+
+	for (	j = 0;				/* count each byte in */
+		j < ((bitlen + 7) / 8);		/* dout[] and din[] */
+
+#if	(CONFIG_SYS_NIOS_SPIBITS == 8)
+		j++) {
+
+		while ((spi->status & NIOS_SPI_TRDY) == 0)
+			;
+		spi->txdata = (unsigned)(txd[j]);
+
+		while ((spi->status & NIOS_SPI_RRDY) == 0)
+			;
+		rxd[j] = (unsigned char)(spi->rxdata & 0xff);
+
+#elif	(CONFIG_SYS_NIOS_SPIBITS == 16)
+		j++, j++) {
+
+		while ((spi->status & NIOS_SPI_TRDY) == 0)
+			;
+		if ((j+1) < ((bitlen + 7) / 8))
+			spi->txdata = (unsigned)((txd[j] << 8) | txd[j+1]);
+		else
+			spi->txdata = (unsigned)(txd[j] << 8);
+
+		while ((spi->status & NIOS_SPI_RRDY) == 0)
+			;
+		rxd[j] = (unsigned char)((spi->rxdata >> 8) & 0xff);
+		if ((j+1) < ((bitlen + 7) / 8))
+			rxd[j+1] = (unsigned char)(spi->rxdata & 0xff);
+
+#else
+#error "*** unsupported value of CONFIG_SYS_NIOS_SPIBITS ***"
+#endif
+
+	}
+
+	if (bitlen > CONFIG_SYS_NIOS_SPIBITS && (flags & SPI_XFER_END)) {
+		spi->control &= ~NIOS_SPI_SSO;
+	}
+
+	if (flags & SPI_XFER_END)
+		spi_cs_deactivate(slave);
+
+	memdump(din, (bitlen + 7) / 8);
+
+	return 0;
+}
+
+#endif /* CONFIG_NIOS_SPI */
diff --git a/arch/nios/cpu/start.S b/arch/nios/cpu/start.S
new file mode 100644
index 000000000..3578a04d5
--- /dev/null
+++ b/arch/nios/cpu/start.S
@@ -0,0 +1,238 @@
+/*
+ * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.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 <timestamp.h>
+#include <version.h>
+
+#if !defined(CONFIG_IDENT_STRING)
+#define CONFIG_IDENT_STRING ""
+#endif
+
+#define STATUS_INIT	0x8600		/* IE=1, IPRI=2 */
+
+/*************************************************************************
+ * RESTART
+ ************************************************************************/
+
+	.text
+	.global _start
+
+_start:
+	bsr	0f
+	nop
+	.long	_start
+
+	/* GERMS -- The "standard-32" configuration GERMS monitor looks
+	 * for the string "Nios" at flash_base + 0xc (actually it only
+	 * tests for 'N', 'i'). You can leave support for this in place
+	 * as it's only a few words.
+	 */
+	. = _start + 0x000c
+	.string "Nios"
+
+	.align 4
+0:
+	/*
+	 * Early setup -- set cwp = HI_LIMIT, IPRI = 2, IE = 1 to
+	 * enable underflow exceptions. Disable cache.
+	 * NOTE: %o7 has return addr -- save in %g7 use later.
+	 */
+	mov	%g7, %o7
+
+	pfx	2			/* WVALID */
+	rdctl	%g0
+	lsri	%g0, 1
+	pfx	%hi(STATUS_INIT)
+	or	%g0, %lo(STATUS_INIT)
+	wrctl	%g0			/* update status */
+	nop
+
+	/*
+	 * STACK
+	 */
+	pfx	%hi(CONFIG_SYS_INIT_SP)
+	movi	%sp, %lo(CONFIG_SYS_INIT_SP)
+	pfx	%xhi(CONFIG_SYS_INIT_SP)
+	movhi	%sp, %xlo(CONFIG_SYS_INIT_SP)
+	mov	%fp, %sp
+
+	pfx	%hi(4*16)
+	subi	%sp, %lo(4*16)		/* Space for reg window mgmt */
+
+	/*
+	 * RELOCATE -- %g7 has return addr from bsr at _start.
+	 */
+	pfx	%hi(__u_boot_cmd_end)
+	movi	%g5, %lo(__u_boot_cmd_end)
+	pfx	%xhi(__u_boot_cmd_end)
+	movhi	%g5, %xlo(__u_boot_cmd_end) /* %g5 <- end address */
+
+	lsli	%g7, 1			/* mem = retaddr << 1 */
+	mov	%g6, %g7
+	subi	%g6, 4			/* %g6 <- src addr */
+	ld	%g7, [%g7]		/* %g7 <- dst addr */
+
+	/* No need to move text sections if we're already located
+	 * at the proper address.
+	 */
+	cmp	%g7, %g6
+	ifs	cc_z
+	br	reloc
+	nop				/* delay slot */
+
+1:	cmp	%g7, %g5
+	skps	cc_nz
+	br	2f
+	nop				/* delay slot */
+
+	ld	%g0, [%g6]
+	addi	%g6, 4			/* src++ */
+	st	[%g7], %g0
+	addi	%g7, 4			/* dst++ */
+	br	1b
+	nop				/* delay slot */
+2:
+
+	/*
+	 * Jump to relocation address
+	 */
+	 pfx	%hi(reloc@h)
+	 movi	%g0, %lo(reloc@h)
+	 pfx	%xhi(reloc@h)
+	 movhi	%g0, %xlo(reloc@h)
+	 jmp	%g0
+	 nop				/* delay slot */
+reloc:
+
+	/*
+	 * CLEAR BSS
+	 */
+	pfx	%hi(__bss_end)
+	movi	%g5, %lo(__bss_end)
+	pfx	%xhi(__bss_end)
+	movhi	%g5, %xlo(__bss_end)	/* %g5 <- end address */
+	pfx	%hi(__bss_start)
+	movi	%g7, %lo(__bss_start)
+	pfx	%xhi(__bss_start)
+	movhi	%g7, %xlo(__bss_start)	/* %g7 <- end address */
+
+	movi	%g0, 0
+3:	cmp	%g7, %g5
+	skps	cc_nz
+	br	4f
+	nop				/* delay slot */
+
+	st	[%g7], %g0
+	addi	%g7, 4			/* (delay slot) dst++ */
+	br	3b
+	nop				/* delay slot */
+4:
+
+	/*
+	 * INIT VECTOR TABLE
+	 */
+	pfx	%hi(CONFIG_SYS_VECT_BASE)
+	movi	%g0, %lo(CONFIG_SYS_VECT_BASE)
+	pfx	%xhi(CONFIG_SYS_VECT_BASE)
+	movhi	%g0, %xlo(CONFIG_SYS_VECT_BASE)	/* dst */
+	mov	%l0, %g0
+
+	pfx	%hi(_vectors)
+	movi	%g1, %lo(_vectors)
+	pfx	%xhi(_vectors)
+	movhi	%g1, %xlo(_vectors)	/* src */
+	bgen	%g2, 6			/* cnt = 64 */
+
+	ldp	%g3, [%l0, 3]		/* bkpt vector */
+	ldp	%g4, [%l0, 4]		/* single step vector */
+
+5:	ld	%g7, [%g1]
+	addi	%g1, 4			/* src++ */
+	st	[%g0], %g7
+	addi	%g0, 4			/* dst++ */
+
+	subi	%g2, 1			/* cnt-- */
+	ifrnz	%g2
+	br	5b
+	nop				/* delay slot */
+
+#if defined(CONFIG_ROM_STUBS)
+	/* Restore the breakpoint and single step exception
+	 * vectors to their original values.
+	 */
+	stp	[%l0,3], %g3		/* breakpoint */
+	stp	[%l0,4], %g4		/* single step */
+#endif
+
+	/* For debug startup convenience ... software breakpoints
+	 * set prior to this point may not succeed ;-)
+	 */
+	.global __start
+__start:
+
+	/*
+	 * Call board_init -- never returns
+	 */
+	pfx	%hi(board_init@h)
+	movi	%g1, %lo(board_init@h)
+	pfx	%xhi(board_init@h)
+	movhi	%g1, %xlo(board_init@h)
+	call	%g1
+	nop				/* Delaly slot */
+	/* NEVER RETURNS */
+
+/*
+ * dly_clks -- Nios doesn't have a time/clk reference for simple
+ * delay loops, so we do our best by counting instruction cycles.
+ * A control register that counts system clock cycles would be
+ * a handy feature -- hint for Altera ;-)
+ */
+	.globl dly_clks
+	/* Each loop is 4 instructions as delay slot is always
+	 * executed. Each instruction is approximately 4 clocks
+	 * (according to some lame info from Altera). So ...
+	 * ... each loop is about 16 clocks.
+	 */
+
+dly_clks:
+	lsri	%o0, 4			/* cnt/16 */
+
+8:	skprnz	%o0
+	br	9f
+	subi	%o0, 1			/* cnt--, Delay slot */
+	br	8b
+	nop
+
+9:	lret
+	nop				/* Delay slot */
+
+
+	.data
+	.globl	version_string
+
+version_string:
+	.ascii U_BOOT_VERSION
+	.ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")"
+	.ascii CONFIG_IDENT_STRING, "\0"
diff --git a/arch/nios/cpu/traps.S b/arch/nios/cpu/traps.S
new file mode 100644
index 000000000..bc4d3f66d
--- /dev/null
+++ b/arch/nios/cpu/traps.S
@@ -0,0 +1,582 @@
+/*
+ * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.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>
+
+/*************************************************************************
+ * Register window underflow
+ *
+ * The register window underflow exception occurs whenever the lowest
+ * valid register window is in use (CWP=LO_LIMIT) and a save instruction
+ * is issued. The save moves CWP below LO_LIMIT, %sp is set as normal,
+ * then the exception is generated prior to executing the instruction
+ * after the save.
+ ************************************************************************/
+	.text
+	.global _cwp_lolimit
+	.align	4
+
+_cwp_lolimit:
+
+	/* Sixteen words are always allocated by the compiler in every
+	 * procedure's stack frame, always starting at %sp, for saving
+	 * 'in' and 'local' registers on a window overflow.
+	 *
+	 * Save the 'global' and 'in' regs on stack. They are restored
+	 * at cwp = HI_LIMIT. The 'local' regs aren't in-use at this point.
+	 */
+	sts	[%sp,0], %g0		/* Save 'global' regs*/
+	sts	[%sp,1], %g1
+	sts	[%sp,2], %g2
+	sts	[%sp,3], %g3
+	sts	[%sp,4], %g4
+	sts	[%sp,5], %g5
+	sts	[%sp,6], %g6
+	sts	[%sp,7], %g7
+
+	sts	[%sp,8], %i0		/* Save 'in' regs */
+	sts	[%sp,9], %i1
+	sts	[%sp,10], %i2
+	sts	[%sp,11], %i3
+	sts	[%sp,12], %i4
+	sts	[%sp,13], %i5
+	sts	[%sp,14], %i6
+	sts	[%sp,15], %i7
+
+	/* Save current %sp and return address in a global so they are
+	 * available at cwp = HI_LIMIT ... where the 'global'/'in' regs
+	 * are restored. NOTE: %sp changes with cwp.
+	 */
+	mov	%g7, %o7
+	mov	%g6, %sp
+
+	/* Get LO_LIMIT/HI_LIMIT to know where to start & stop. Note: in
+	 * the underflow exception, cwp is __NOT__ guaranteed to be zero.
+	 * If the OCI debug module is enabled the reset value for LO_LIMIT
+	 * is 2, not 1 -- so cwp can be 1 or 0.
+	 */
+	pfx	2			/* WVALID */
+	rdctl	%g1
+	mov	%g2, %g1
+	pfx	0
+	and	%g1, 0x1f		/* g1 <- LO_LIMIT */
+	lsri	%g2, 5
+	pfx	0
+	and	%g2,0x1f		/* g2 <- HI_LIMIT */
+
+	/* Set istatus so cwp = HI_LIMIT after tret
+	 */
+	movi	%g5, 0x1f
+	lsli	%g5, 4
+	not	%g5			/* mask to clr cwp */
+	pfx	1			/* istatus */
+	rdctl	%g0
+	and	%g0, %g5		/* clear cwp field */
+
+	mov	%g4, %g2
+	lsli	%g4, 4
+	or	%g0, %g4		/* cwp = HI_LIMIT */
+	pfx	1
+	wrctl	%g0			/* update istatus */
+
+	/* Now move up the register file, saving as we go. When loop
+	 * is first entered, %g1 is at LO_LIMIT.
+	 */
+0:
+	restore				/* cwp++ */
+	sts	[%sp,0], %l0		/* Save "local" regs*/
+	sts	[%sp,1], %l1
+	sts	[%sp,2], %l2
+	sts	[%sp,3], %l3
+	sts	[%sp,4], %l4
+	sts	[%sp,5], %l5
+	sts	[%sp,6], %l6
+	sts	[%sp,7], %l7
+
+	sts	[%sp,8], %i0		/* Save 'in' regs */
+	sts	[%sp,9], %i1
+	sts	[%sp,10], %i2
+	sts	[%sp,11], %i3
+	sts	[%sp,12], %i4
+	sts	[%sp,13], %i5
+	sts	[%sp,14], %i6
+	sts	[%sp,15], %i7
+
+	cmp	%g1, %g2		/* cwp == HI_LIMIT ? */
+	skps	cc_ne			/* if so, we're done */
+	br	1f
+	nop				/* delay slot */
+
+	inc	%g1			/* g1 <- cwp++ */
+	br	0b
+	nop				/* delay slot */
+
+	/* At this point cwp = HI_LIMIT, so the global/in regs that were
+	 * in place when the underflow occurred must be restored using
+	 * the original stack pointer (saved in g6).
+	 */
+1:
+	mov	%o7, %g7		/* restore return addr */
+	mov	%sp, %g6		/* Restore original sp */
+
+	lds	%g0, [%sp,0]		/* Restore 'global' regs*/
+	lds	%g1, [%sp,1]
+	lds	%g2, [%sp,2]
+	lds	%g3, [%sp,3]
+	lds	%g4, [%sp,4]
+	lds	%g5, [%sp,5]
+	lds	%g6, [%sp,6]
+	lds	%g7, [%sp,7]
+
+	lds	%i0, [%sp,8]		/* Restore 'in' regs*/
+	lds	%i1, [%sp,9]
+	lds	%i2, [%sp,10]
+	lds	%i3, [%sp,11]
+	lds	%i4, [%sp,12]
+	lds	%i5, [%sp,13]
+	lds	%i6, [%sp,14]
+	lds	%i7, [%sp,15]
+
+	tret	%o7			/* All done */
+
+/*************************************************************************
+ * Register window overflow
+ *
+ * The register window overflow exception occurs whenever the highest
+ * valid register window is in use (cwp = HI_LIMIT) and a restore
+ * instruction is issued. Control is transferred to the overflow handler
+ * before the instruction following restore is executed.
+ *
+ * When a register window overflow exception is taken, the exception
+ * handler sees cwp at HI_LIMIT.
+ ************************************************************************/
+	.text
+	.global _cwp_hilimit
+	.align	4
+
+_cwp_hilimit:
+
+	/* Save 'global'/'in' regs on the stack -- will restore when cwp
+	 * is at LO_LIMIT. Locals don't need saving as they are going away.
+	 */
+	sts	[%sp,0], %g0		/* Save "global" regs*/
+	sts	[%sp,1], %g1
+	sts	[%sp,2], %g2
+	sts	[%sp,3], %g3
+	sts	[%sp,4], %g4
+	sts	[%sp,5], %g5
+	sts	[%sp,6], %g6
+	sts	[%sp,7], %g7
+
+	sts	[%sp,8], %i0		/* Save 'in' regs */
+	sts	[%sp,9], %i1
+	sts	[%sp,10], %i2
+	sts	[%sp,11], %i3
+	sts	[%sp,12], %i4
+	sts	[%sp,13], %i5
+	sts	[%sp,14], %i6
+	sts	[%sp,15], %i7
+
+	/* The current %sp must be available in global to restore regs
+	 * saved on stack. Need return addr as well ;-)
+	 */
+	mov	%g7, %o7
+	mov	%g6, %sp
+
+	/* Get HI_LIMIT & LO_LIMIT
+	 */
+	pfx	2			/* WVALID */
+	rdctl	%g1
+	mov	%g2, %g1
+	pfx	0
+	and	%g1, 0x1f		/* g1 <- LO_LIMIT */
+	lsri	%g2, 5
+	pfx	0
+	and	%g2,0x1f		/* g2 <- HI_LIMIT */
+
+	/* Set istatus so cwp = LO_LIMIT after tret
+	 */
+	movi	%g5, 0x1f
+	lsli	%g5, 4
+	not	%g5			/* mask to clr cwp */
+	pfx	1			/* istatus */
+	rdctl	%g0
+	and	%g0, %g5		/* clear cwp field */
+
+	mov	%g4, %g1		/* g4 <- LO_LIMIT */
+	lsli	%g4, 4
+	or	%g0, %g4		/* cwp = LO_LIMIT */
+	pfx	1
+	wrctl	%g0			/* update istatus */
+
+	/* Move to cwp = LO_LIMIT-1 and restore 'in' regs.
+	 */
+	subi	%g4,(1 << 4)		/* g4 <- LO_LIMIT - 1 */
+	rdctl	%g0
+	and	%g0, %g5		/* clear cwp field */
+	or	%g0, %g4		/* cwp = LO_LIMIT - 1 */
+	wrctl	%g0			/* update status */
+	nop
+
+	mov	%sp, %g6		/* Restore sp */
+	lds	%i0, [%sp,8]		/* Restore 'in' regs */
+	lds	%i1, [%sp,9]
+	lds	%i2, [%sp,10]
+	lds	%i3, [%sp,11]
+	lds	%i4, [%sp,12]
+	lds	%i5, [%sp,13]
+	lds	%i6, [%sp,14]		/* sp in next window */
+	lds	%i7, [%sp,15]
+
+	/* Starting at LO_LIMIT-1, move up the register file, restoring
+	 * along the way.
+	 */
+0:
+	restore				/* cwp++ */
+	lds	%l0, [%sp,0]		/* Restore 'local' regs*/
+	lds	%l1, [%sp,1]
+	lds	%l2, [%sp,2]
+	lds	%l3, [%sp,3]
+	lds	%l4, [%sp,4]
+	lds	%l5, [%sp,5]
+	lds	%l6, [%sp,6]
+	lds	%l7, [%sp,7]
+
+	lds	%i0, [%sp,8]		/* Restore 'in' regs */
+	lds	%i1, [%sp,9]
+	lds	%i2, [%sp,10]
+	lds	%i3, [%sp,11]
+	lds	%i4, [%sp,12]
+	lds	%i5, [%sp,13]
+	lds	%i6, [%sp,14]		/* sp in next window */
+	lds	%i7, [%sp,15]
+
+	cmp	%g1, %g2		/* cwp == HI_LIMIT ? */
+	skps	cc_ne			/* if so, we're done */
+	br	1f
+	nop				/* delay slot */
+
+	inc	%g1			/* cwp++ */
+	br	0b
+	nop				/* delay slot */
+
+	/* All windows have been updated at this point, but the globals
+	 * still need to be restored. Go to cwp = LO_LIMIT-1 to get
+	 * some registers to use.
+	 */
+1:
+	rdctl	%g0
+	and	%g0, %g5		/* clear cwp field */
+	or	%g0, %g4		/* cwp = LO_LIMIT - 1 */
+	wrctl	%g0			/* update status */
+	nop
+
+	/* Now there are some registers available to use in restoring
+	 * the globals.
+	 */
+	mov	%sp, %g6
+	mov	%o7, %g7
+
+	lds	%g0, [%sp,0]		/* Restore "global" regs*/
+	lds	%g1, [%sp,1]
+	lds	%g2, [%sp,2]
+	lds	%g3, [%sp,3]
+	lds	%g4, [%sp,4]
+	lds	%g5, [%sp,5]
+	lds	%g6, [%sp,6]
+	lds	%g7, [%sp,7]
+
+	/* The tret moves istatus -> status. istatus was already set for
+	 * cwp = LO_LIMIT.
+	 */
+
+	tret	%o7			/* done */
+
+/*************************************************************************
+ * Default exception handler
+ *
+ * The default handler passes control to external_interrupt(). So trap
+ * or hardware interrupt hanlders can be installed using the familiar
+ * irq_install_handler().
+ *
+ * Here, the stack is fixed-up and cwp is incremented prior to calling
+ * external_interrupt(). This lets the underflow and overflow handlers
+ * operate normally during the exception.
+ ************************************************************************/
+	.text
+	.global _def_xhandler
+	.align	4
+
+_def_xhandler:
+
+	/* Allocate some stack space: 16 words at %sp to accomodate
+	 * a reg window underflow, 8 words to save interrupted task's
+	 * 'out' regs (which are now the 'in' regs), 8 words to preserve
+	 * the 'global' regs and 3 words to save the return address,
+	 * status and istatus. istatus must be saved in the event an
+	 * underflow occurs in a dispatched handler. status is saved so
+	 * a handler can access it on stack.
+	 */
+	pfx	%hi((16+16+3) * 4)
+	subi	%fp, %lo((16+16+3) * 4)
+	mov	%sp, %fp
+
+	/* Save the 'global' regs and the interrupted task's 'out' regs
+	 * (our 'in' regs) along with the return addr, status & istatus.
+	 * First 16 words are for underflow exception.
+	 */
+	rdctl	%l0			/* status */
+	pfx	1			/* istatus */
+	rdctl	%l1
+
+	sts	[%sp,16+0], %g0		/* Save 'global' regs*/
+	sts	[%sp,16+1], %g1
+	sts	[%sp,16+2], %g2
+	sts	[%sp,16+3], %g3
+	sts	[%sp,16+4], %g4
+	sts	[%sp,16+5], %g5
+	sts	[%sp,16+6], %g6
+	sts	[%sp,16+7], %g7
+
+	sts	[%sp,16+8], %i0		/* Save 'in' regs */
+	sts	[%sp,16+9], %i1
+	sts	[%sp,16+10], %i2
+	sts	[%sp,16+11], %i3
+	sts	[%sp,16+12], %i4
+	sts	[%sp,16+13], %i5
+	sts	[%sp,16+14], %i6
+	sts	[%sp,16+15], %i7
+
+	sts	[%sp,16+16], %l0	/* status */
+	sts	[%sp,16+17], %l1	/* istatus */
+	sts	[%sp,16+18], %o7	/* return addr */
+
+	/* Move to cwp+1 ... this guarantees cwp is at or above LO_LIMIT.
+	 * Need to set IPRI=3 and IE=1 to enable underflow exceptions.
+	 * NOTE: only the 'out' regs have been saved ... can't touch
+	 * the 'in' or 'local' here.
+	 */
+	restore				/* cwp++ */
+	rdctl	%o0			/* o0 <- status */
+
+	pfx	%hi(0x7e00)
+	movi	%o1, %lo(0x7e00)
+	not	%o1
+	and	%o0, %o1		/* clear IPRI */
+
+	pfx	%hi(0x8600)
+	movi	%o1, %lo(0x8600)
+	or	%o0, %o1		/* IPRI=3, IE=1 */
+
+	wrctl	%o0			/* o0 -> status */
+	nop
+
+	/* It's ok to call a C routine now since cwp >= LO_LIMIT,
+	 * interrupt task's registers are/will be preserved, and
+	 * underflow exceptions can be handled.
+	 */
+	pfx	%hi(external_interrupt@h)
+	movi	%o1, %lo(external_interrupt@h)
+	pfx	%xhi(external_interrupt@h)
+	movhi	%o1, %xlo(external_interrupt@h)
+	bgen	%o0, 4+2		/* 16 * 4 */
+	add	%o0, %sp		/* Ptr to regs */
+	call	%o1
+	nop
+
+	/* Move back to the exception register window, restore the 'out'
+	 * registers, then return from exception.
+	 */
+	rdctl	%o0			/* o0 <- status */
+	subi	%o0, 16
+	wrctl	%o0			/* cwp-- */
+	nop
+
+	mov	%sp, %fp
+	lds	%g0, [%sp,16+0]		/* Restore 'global' regs*/
+	lds	%g1, [%sp,16+1]
+	lds	%g2, [%sp,16+2]
+	lds	%g3, [%sp,16+3]
+	lds	%g4, [%sp,16+4]
+	lds	%g5, [%sp,16+5]
+	lds	%g6, [%sp,16+6]
+	lds	%g7, [%sp,16+7]
+
+	lds	%i0, [%sp,16+8]		/* Restore 'in' regs*/
+	lds	%i1, [%sp,16+9]
+	lds	%i2, [%sp,16+10]
+	lds	%i3, [%sp,16+11]
+	lds	%i4, [%sp,16+12]
+	lds	%i5, [%sp,16+13]
+	lds	%i6, [%sp,16+14]
+	lds	%i7, [%sp,16+15]
+
+	lds	%l0, [%sp,16+16]	/* status */
+	lds	%l1, [%sp,16+17]	/* istatus */
+	lds	%o7, [%sp,16+18]	/* return addr */
+
+	pfx	1
+	wrctl	%l1			/* restore istatus */
+
+	pfx	%hi((16+16+3) * 4)
+	addi	%sp, %lo((16+16+3) * 4)
+	mov	%fp, %sp
+
+	tret	%o7			/* Done */
+
+
+/*************************************************************************
+ * Timebase Timer Interrupt -- This has identical structure to above,
+ * but calls timer_interrupt().  Doing it this way keeps things similar
+ * to other architectures (e.g. ppc).
+ ************************************************************************/
+	.text
+	.global _timebase_int
+	.align	4
+
+_timebase_int:
+
+	/* Allocate  stack space.
+	 */
+	pfx	%hi((16+16+3) * 4)
+	subi	%fp, %lo((16+16+3) * 4)
+	mov	%sp, %fp
+
+	/* Save the 'global' regs & 'out' regs (our 'in' regs)
+	 */
+	rdctl	%l0			/* status */
+	pfx	1			/* istatus */
+	rdctl	%l1
+
+	sts	[%sp,16+0], %g0		/* Save 'global' regs*/
+	sts	[%sp,16+1], %g1
+	sts	[%sp,16+2], %g2
+	sts	[%sp,16+3], %g3
+	sts	[%sp,16+4], %g4
+	sts	[%sp,16+5], %g5
+	sts	[%sp,16+6], %g6
+	sts	[%sp,16+7], %g7
+
+	sts	[%sp,16+8], %i0		/* Save 'in' regs */
+	sts	[%sp,16+9], %i1
+	sts	[%sp,16+10], %i2
+	sts	[%sp,16+11], %i3
+	sts	[%sp,16+12], %i4
+	sts	[%sp,16+13], %i5
+	sts	[%sp,16+14], %i6
+	sts	[%sp,16+15], %i7
+
+	sts	[%sp,16+16], %l0	/* status */
+	sts	[%sp,16+17], %l1	/* istatus */
+	sts	[%sp,16+18], %o7	/* return addr */
+
+	/* Move to cwp+1.
+	 */
+	restore				/* cwp++ */
+	rdctl	%o0			/* o0 <- status */
+
+	pfx	%hi(0x7e00)
+	movi	%o1, %lo(0x7e00)
+	not	%o1
+	and	%o0, %o1		/* clear IPRI */
+
+	pfx	%hi(0x8600)
+	movi	%o1, %lo(0x8600)
+	or	%o0, %o1		/* IPRI=3, IE=1 */
+
+	wrctl	%o0			/* o0 -> status */
+	nop
+
+	/* Call timer_interrupt()
+	 */
+	pfx	%hi(timer_interrupt@h)
+	movi	%o1, %lo(timer_interrupt@h)
+	pfx	%xhi(timer_interrupt@h)
+	movhi	%o1, %xlo(timer_interrupt@h)
+	bgen	%o0, 4+2		/* 16 * 4 */
+	add	%o0, %sp		/* Ptr to regs */
+	call	%o1
+	nop
+
+	/* Move back to the exception register window, restore the 'out'
+	 * registers, then return from exception.
+	 */
+	rdctl	%o0			/* o0 <- status */
+	subi	%o0, 16
+	wrctl	%o0			/* cwp-- */
+	nop
+
+	mov	%sp, %fp
+	lds	%g0, [%sp,16+0]		/* Restore 'global' regs*/
+	lds	%g1, [%sp,16+1]
+	lds	%g2, [%sp,16+2]
+	lds	%g3, [%sp,16+3]
+	lds	%g4, [%sp,16+4]
+	lds	%g5, [%sp,16+5]
+	lds	%g6, [%sp,16+6]
+	lds	%g7, [%sp,16+7]
+
+	lds	%i0, [%sp,16+8]		/* Restore 'in' regs*/
+	lds	%i1, [%sp,16+9]
+	lds	%i2, [%sp,16+10]
+	lds	%i3, [%sp,16+11]
+	lds	%i4, [%sp,16+12]
+	lds	%i5, [%sp,16+13]
+	lds	%i6, [%sp,16+14]
+	lds	%i7, [%sp,16+15]
+
+	lds	%l0, [%sp,16+16]	/* status */
+	lds	%l1, [%sp,16+17]	/* istatus */
+	lds	%o7, [%sp,16+18]	/* return addr */
+
+	pfx	1
+	wrctl	%l1			/* restore istatus */
+
+	pfx	%hi((16+16+3) * 4)
+	addi	%sp, %lo((16+16+3) * 4)
+	mov	%fp, %sp
+
+	tret	%o7			/* Done */
+
+/*************************************************************************
+ * GDB stubs
+ ************************************************************************/
+	.text
+	.global _brkpt_hw_int, _brkpt_sw_int
+	.align	4
+
+_brkpt_hw_int:
+	movi	%l1, 9
+	pfx	3
+	wrctl	%l1
+	pfx	4
+	wrctl	%l1
+
+_brkpt_sw_int:
+	movi	%l1, 9
+	pfx	3
+	wrctl	%l1
+	pfx	4
+	wrctl	%l1
+
+	tret	%o7