* Patch by Scott McNutt, 04 Oct 2003:

  - add support for Altera Nios-32 CPU
  - add support for Nios Cyclone Development Kit (DK-1C20)

* Patch by Steven Scholz, 29 Sep 2003:
  - A second parameter for bootm overwrites the load address for
    "Standalone Application" images.
  - bootm sets environment variable "filesize" to the resulting
    (uncompressed) data length for "Standalone Application" images
    when autostart is set to "no". Now you can do something like
       if bootm $fpgadata $some_free_ram ; then
               fpga load 0 $some_free_ram $filesize
       fi

* Patch by Denis Peter, 25 Sept 2003:
  add support for the MIP405 Rev. C board

8 files changed, 486 insertions, 0 deletions

diff --git a/lib_nios/Makefile b/lib_nios/Makefile
new file mode 100644
index 0000000000..eff46db819
--- /dev/null
+++ b/lib_nios/Makefile
@@ -0,0 +1,44 @@
+#
+# (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
+#
+
+include $(TOPDIR)/config.mk
+
+LIB	= lib$(ARCH).a
+
+AOBJS	=
+
+COBJS	= board.o cache.o divmod.o nios_linux.o mult.o time.o
+
+OBJS	= $(AOBJS) $(COBJS)
+
+$(LIB):	.depend $(OBJS)
+	$(AR) crv $@ $(OBJS)
+
+#########################################################################
+
+.depend:	Makefile $(AOBJS:.o=.S) $(COBJS:.o=.c)
+		$(CC) -M $(CFLAGS) $(AOBJS:.o=.S) $(COBJS:.o=.c) > $@
+
+sinclude .depend
+
+#########################################################################
diff --git a/lib_nios/board.c b/lib_nios/board.c
new file mode 100644
index 0000000000..c81c0011e2
--- /dev/null
+++ b/lib_nios/board.c
@@ -0,0 +1,166 @@
+/*
+ * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.com>
+ *
+ * (C) Copyright 2000-2002
+ * 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 <common.h>
+#include <devices.h>
+#include <watchdog.h>
+
+
+/*
+ * All attempts to come up with a "common" initialization sequence
+ * that works for all boards and architectures failed: some of the
+ * requirements are just _too_ different. To get rid of the resulting
+ * mess of board dependend #ifdef'ed code we now make the whole
+ * initialization sequence configurable to the user.
+ *
+ * The requirements for any new initalization function is simple: it
+ * receives a pointer to the "global data" structure as it's only
+ * argument, and returns an integer return code, where 0 means
+ * "continue" and != 0 means "fatal error, hang the system".
+ */
+
+
+extern void malloc_bin_reloc (void);
+typedef int (init_fnc_t) (void);
+extern unsigned _vectors[];
+
+/*
+ * Begin and End of memory area for malloc(), and current "brk"
+ */
+static	ulong	mem_malloc_start = 0;
+static	ulong	mem_malloc_end	 = 0;
+static	ulong	mem_malloc_brk	 = 0;
+
+/*
+ * The Malloc area is immediately below the monitor copy in RAM
+ */
+static void mem_malloc_init (void)
+{
+	mem_malloc_start = CFG_MALLOC_BASE;
+	mem_malloc_end = mem_malloc_start + CFG_MALLOC_LEN;
+	mem_malloc_brk = mem_malloc_start;
+	memset ((void *) mem_malloc_start,
+		0,
+		mem_malloc_end - mem_malloc_start);
+}
+
+void *sbrk (ptrdiff_t increment)
+{
+	ulong old = mem_malloc_brk;
+	ulong new = old + increment;
+
+	if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
+		return (NULL);
+	}
+	mem_malloc_brk = new;
+	return ((void *) old);
+}
+
+
+/************************************************************************
+ * Initialization sequence						*
+ ***********************************************************************/
+
+init_fnc_t *init_sequence[] = {
+
+#if defined(CONFIG_BOARD_PRE_INIT)
+	board_pre_init,		/* Call board-specific init code early.*/
+#endif
+
+	env_init,
+	serial_init,
+	console_init_f,
+	display_options,
+	checkcpu,
+	checkboard,
+	NULL,			/* Terminate this list */
+};
+
+
+/***********************************************************************/
+void board_init (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	bd_t *bd;
+	init_fnc_t **init_fnc_ptr;
+
+	/* Pointer is writable since we allocated a register for it.
+	 * Nios treats CFG_GBL_DATA_OFFSET as an address.
+	 */
+	gd = (gd_t *)CFG_GBL_DATA_OFFSET;
+	memset( gd, 0, CFG_GBL_DATA_SIZE );
+
+	/* Copy exception vectors to the correct location.
+	 */
+	memcpy( (void *)CFG_VECT_BASE, _vectors, 256 );
+
+	gd->bd = (bd_t *)(gd+1);	/* At end of global data */
+	gd->baudrate = CONFIG_BAUDRATE;
+	gd->cpu_clk = CONFIG_SYS_CLK_FREQ;
+
+	bd = gd->bd;
+	bd->bi_memstart	= CFG_SDRAM_BASE;
+	bd->bi_memsize = CFG_SDRAM_SIZE;
+	bd->bi_flashstart = CFG_FLASH_BASE;
+	bd->bi_sramstart= CFG_SRAM_BASE;
+	bd->bi_sramsize	= CFG_SRAM_SIZE;
+	bd->bi_baudrate	= CONFIG_BAUDRATE;
+
+	for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
+		if ((*init_fnc_ptr) () != 0) {
+			hang ();
+		}
+	}
+
+	bd->bi_flashsize = flash_init();
+
+	mem_malloc_init();
+	malloc_bin_reloc();
+	env_relocate();
+
+	devices_init();
+	jumptable_init();
+	console_init_r();
+	/*
+	 */
+
+	interrupt_init ();
+	/* main_loop */
+	for (;;) {
+		WATCHDOG_RESET ();
+		main_loop ();
+	}
+}
+
+
+/***********************************************************************/
+
+void hang (void)
+{
+	puts("### ERROR ### Please reset board ###\n");
+	for (;;);
+}
diff --git a/lib_nios/cache.c b/lib_nios/cache.c
new file mode 100644
index 0000000000..87dbab1734
--- /dev/null
+++ b/lib_nios/cache.c
@@ -0,0 +1,32 @@
+/*
+ * (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>
+
+
+void flush_cache (ulong addr, ulong size)
+{
+	/* Nios cache is write-thru -- nothing to do here.
+	 */
+	return;
+}
diff --git a/lib_nios/divmod.c b/lib_nios/divmod.c
new file mode 100644
index 0000000000..3c7e71e975
--- /dev/null
+++ b/lib_nios/divmod.c
@@ -0,0 +1,101 @@
+/*
+ * This file is part of GNU CC.
+ *
+ * GNU CC 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, or (at your
+ * option) any later version.
+ *
+ * GNU CC 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 GNU CC; see the file COPYING.  If not, write
+ * to the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+
+#include "math.h"
+
+USItype udivmodsi4 (USItype num, USItype den, word_type modwanted)
+{
+	USItype bit = 1;
+	USItype res = 0;
+
+	while (den < num && bit && !(den & (1L << 31))) {
+		den <<= 1;
+		bit <<= 1;
+	}
+	while (bit) {
+		if (num >= den) {
+			num -= den;
+			res |= bit;
+		}
+		bit >>= 1;
+		den >>= 1;
+	}
+	if (modwanted)
+		return num;
+	return res;
+}
+
+
+SItype __divsi3 (SItype a, SItype b)
+{
+	word_type neg = 0;
+	SItype res;
+
+	if (a < 0) {
+		a = -a;
+		neg = !neg;
+	}
+
+	if (b < 0) {
+		b = -b;
+		neg = !neg;
+	}
+
+	res = udivmodsi4 (a, b, 0);
+
+	if (neg)
+		res = -res;
+
+	return res;
+}
+
+
+SItype __modsi3 (SItype a, SItype b)
+{
+	word_type neg = 0;
+	SItype res;
+
+	if (a < 0) {
+		a = -a;
+		neg = 1;
+	}
+
+	if (b < 0)
+		b = -b;
+
+	res = udivmodsi4 (a, b, 1);
+
+	if (neg)
+		res = -res;
+
+	return res;
+}
+
+
+SItype __udivsi3 (SItype a, SItype b)
+{
+	return udivmodsi4 (a, b, 0);
+}
+
+
+SItype __umodsi3 (SItype a, SItype b)
+{
+	return udivmodsi4 (a, b, 1);
+}
diff --git a/lib_nios/math.h b/lib_nios/math.h
new file mode 100644
index 0000000000..ccffbbc2e7
--- /dev/null
+++ b/lib_nios/math.h
@@ -0,0 +1,16 @@
+#define BITS_PER_UNIT	8
+
+typedef 	 int HItype		__attribute__ ((mode (HI)));
+typedef unsigned int UHItype		__attribute__ ((mode (HI)));
+
+typedef		 int SItype		__attribute__ ((mode (SI)));
+typedef unsigned int USItype		__attribute__ ((mode (SI)));
+
+typedef int word_type			__attribute__ ((mode (__word__)));
+
+struct SIstruct {HItype low, high;};
+
+typedef union {
+	struct SIstruct s;
+	SItype ll;
+} SIunion;
diff --git a/lib_nios/mult.c b/lib_nios/mult.c
new file mode 100644
index 0000000000..66bb64d0c1
--- /dev/null
+++ b/lib_nios/mult.c
@@ -0,0 +1,56 @@
+/*
+ * This file is part of GNU CC.
+ *
+ * GNU CC 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, or (at your
+ * option) any later version.
+ *
+ * GNU CC 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 GNU CC; see the file COPYING.  If not, write
+ * to the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+
+#include <common.h>
+
+#if !defined(CFG_NIOS_MULT_HW) && !defined(CFG_NIOS_MULT_MSTEP)
+
+#include "math.h"
+
+USItype __mulsi3 (USItype a, USItype b)
+{
+	USItype c = 0;
+
+	while (a != 0) {
+		if (a & 1)
+			c += b;
+		a >>= 1;
+		b <<= 1;
+	}
+
+	return c;
+}
+
+
+UHItype __mulhi3 (UHItype a, UHItype b)
+{
+	UHItype c = 0;
+
+	while (a != 0) {
+		if (a & 1)
+			c += b;
+		a >>= 1;
+		b <<= 1;
+	}
+
+	return c;
+}
+
+#endif /*!defined(CFG_NIOS_MULT_HW) && !defined(CFG_NIOS_MULT_MSTEP) */
diff --git a/lib_nios/nios_linux.c b/lib_nios/nios_linux.c
new file mode 100644
index 0000000000..eef17573f9
--- /dev/null
+++ b/lib_nios/nios_linux.c
@@ -0,0 +1,34 @@
+/*
+ * (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 <command.h>
+
+/* FIXME: Once we find a stable version of uC-linux for nios
+ * we can get this working. ;-)
+ *
+ */
+void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
+		ulong addr, ulong *len_ptr, int   verify)
+{
+}
diff --git a/lib_nios/time.c b/lib_nios/time.c
new file mode 100644
index 0000000000..765b9c1989
--- /dev/null
+++ b/lib_nios/time.c
@@ -0,0 +1,37 @@
+/*
+ * (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>
+
+
+extern void dly_clks( unsigned long ticks );
+
+void udelay(unsigned long usec)
+{
+	/* The Nios core doesn't have a timebase, so we do our
+	 * best for now and call a low-level loop that counts
+	 * cpu clocks.
+	 */
+	unsigned long cnt = (CONFIG_SYS_CLK_FREQ/1000000) * usec;
+	dly_clks (cnt);
+}