* 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

6 files changed, 543 insertions, 0 deletions

diff --git a/board/dk1c20/Makefile b/board/dk1c20/Makefile
new file mode 100644
index 0000000..1fd71c72
--- /dev/null
+++ b/board/dk1c20/Makefile
@@ -0,0 +1,48 @@
+#
+# (C) Copyright 2001
+# 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 $(TOPDIR)/config.mk
+
+LIB	= lib$(BOARD).a
+
+OBJS	:= $(BOARD).o flash.o
+
+SOBJS  = vectors.o
+
+$(LIB):	$(OBJS) $(SOBJS)
+	$(AR) crv $@ $^
+
+clean:
+	rm -f $(SOBJS) $(OBJS)
+
+distclean:	clean
+	rm -f $(LIB) core *.bak .depend
+
+#########################################################################
+
+.depend:	Makefile $(SOBJS:.o=.S) $(OBJS:.o=.c)
+		$(CC) -M $(CPPFLAGS) $(SOBJS:.o=.S) $(OBJS:.o=.c) > $@
+
+-include .depend
+
+#########################################################################
diff --git a/board/dk1c20/config.mk b/board/dk1c20/config.mk
new file mode 100644
index 0000000..12c74e6
--- /dev/null
+++ b/board/dk1c20/config.mk
@@ -0,0 +1,30 @@
+#
+# (C) Copyright 2003
+# Psyent Corporation
+# Scott McNutt <smcnutt@psyent.com>
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+TEXT_BASE = 0x018c0000
+
+ifeq ($(debug),1)
+PLATFORM_CPPFLAGS += -DDEBUG
+endif
+
diff --git a/board/dk1c20/dk1c20.c b/board/dk1c20/dk1c20.c
new file mode 100644
index 0000000..ff0b91d
--- /dev/null
+++ b/board/dk1c20/dk1c20.c
@@ -0,0 +1,45 @@
+/*
+ * (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 _default_hdlr (void)
+{
+	printf ("default_hdlr\n");
+}
+
+int board_pre_init (void)
+{
+	return 0;
+}
+
+int checkboard (void)
+{
+	puts ("Board: Altera Nios 1C20 Development Kit\n");
+	return 0;
+}
+
+long int initdram (int board_type)
+{
+	return (0);
+}
diff --git a/board/dk1c20/flash.c b/board/dk1c20/flash.c
new file mode 100644
index 0000000..c64f7dc
--- /dev/null
+++ b/board/dk1c20/flash.c
@@ -0,0 +1,226 @@
+/*
+ * (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 <common.h>
+#include <nios.h>
+
+/*---------------------------------------------------------------------*/
+#define BANKSZ	(8 * 1024 * 1024)
+#define SECTSZ	(64 * 1024)
+#define USERFLASH (2 * 1024 * 1024)	/* bottom 2 MB for user */
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+#define FLASH_WORD_SIZE unsigned char
+
+/*---------------------------------------------------------------------*/
+
+unsigned long flash_init (void)
+{
+	int i;
+	unsigned long addr;
+	flash_info_t *fli = &flash_info[0];
+
+	fli->size = BANKSZ;
+	fli->sector_count = CFG_MAX_FLASH_SECT;
+	fli->flash_id = FLASH_MAN_AMD;
+
+	addr = CFG_FLASH_BASE;
+	for (i = 0; i < fli->sector_count; ++i) {
+		fli->start[i] = addr;
+		addr += SECTSZ;
+
+		/* Protect all but 2 MByte user area */
+		if (addr < (CFG_FLASH_BASE + USERFLASH))
+			fli->protect[i] = 0;
+		else
+			fli->protect[i] = 1;
+	}
+
+	return (BANKSZ);
+}
+
+/*--------------------------------------------------------------------*/
+void flash_print_info (flash_info_t * info)
+{
+	int i, k;
+	unsigned long size;
+	int erased;
+	volatile unsigned char *flash;
+
+	printf ("  Size: %ld KB in %d Sectors\n",
+		info->size >> 10, info->sector_count);
+	printf ("  Sector Start Addresses:");
+	for (i = 0; i < info->sector_count; ++i) {
+
+		/* Check if whole sector is erased */
+		if (i != (info->sector_count - 1))
+			size = info->start[i + 1] - info->start[i];
+		else
+			size = info->start[0] + info->size - info->start[i];
+		erased = 1;
+		flash = (volatile unsigned char *) info->start[i];
+		for (k = 0; k < size; k++) {
+			if (*flash++ != 0xff) {
+				erased = 0;
+				break;
+			}
+		}
+
+		/* Print the info */
+		if ((i % 5) == 0)
+			printf ("\n   ");
+		printf (" %08lX%s%s", info->start[i], erased ? " E" : "  ",
+			info->protect[i] ? "RO " : "   ");
+	}
+	printf ("\n");
+}
+
+/*-------------------------------------------------------------------*/
+
+
+int flash_erase (flash_info_t * info, int s_first, int s_last)
+{
+	volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[0]);
+	volatile FLASH_WORD_SIZE *addr2;
+	int prot, sect;
+	int any = 0;
+	unsigned oldpri;
+	ulong start;
+
+	/* Some sanity checking */
+	if ((s_first < 0) || (s_first > s_last)) {
+		printf ("- no sectors to erase\n");
+		return 1;
+	}
+
+	prot = 0;
+	for (sect = s_first; sect <= s_last; ++sect) {
+		if (info->protect[sect]) {
+			prot++;
+		}
+	}
+	if (prot) {
+		printf ("- Warning: %d protected sectors will not be erased!\n",
+			prot);
+	} else {
+		printf ("\n");
+	}
+
+	/* NOTE: disabling interrupts on Nios can be very bad since it
+	 * also disables the LO_LIMIT exception. It's better here to
+	 * set the interrupt priority to 3 & restore it when we're done.
+	 */
+	oldpri = ipri (3);
+
+	/* It's ok to erase multiple sectors provided we don't delay more
+	 * than 50 usec between cmds ... at which point the erase time-out
+	 * occurs. So don't go and put printf() calls in the loop ... it
+	 * won't be very helpful ;-)
+	 */
+	for (sect = s_first; sect <= s_last; sect++) {
+		if (info->protect[sect] == 0) {	/* not protected */
+			addr2 = (FLASH_WORD_SIZE *) (info->start[sect]);
+			*addr = 0xaa;
+			*addr = 0x55;
+			*addr = 0x80;
+			*addr = 0xaa;
+			*addr = 0x55;
+			*addr2 = 0x30;
+			any = 1;
+		}
+	}
+
+	/* Now just wait for 0xff & provide some user feedback while
+	 * we wait.
+	 */
+	if (any) {
+		addr2 = (FLASH_WORD_SIZE *) (info->start[sect]);
+		start = get_timer (0);
+		while (*addr2 != 0xff) {
+			udelay (1000 * 1000);
+			putc ('.');
+			if (get_timer (start) > CFG_FLASH_ERASE_TOUT) {
+				printf ("timeout\n");
+				return 1;
+			}
+		}
+		printf ("\n");
+	}
+
+	/* Restore interrupt priority */
+	ipri (oldpri);
+
+	return 0;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+
+int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+
+	vu_char *cmd = (vu_char *) info->start[0];
+	vu_char *dst = (vu_char *) addr;
+	unsigned char b;
+	unsigned oldpri;
+	ulong start;
+
+	while (cnt) {
+		/* Check for sufficient erase */
+		b = *src;
+		if ((*dst & b) != b) {
+			printf ("%02x : %02x\n", *dst, b);
+			return (2);
+		}
+
+		/* Disable interrupts other than window underflow
+		 * (interrupt priority 2)
+		 */
+		oldpri = ipri (3);
+		*cmd = 0xaa;
+		*cmd = 0x55;
+		*cmd = 0xa0;
+		*dst = b;
+
+		/* Verify write */
+		start = get_timer (0);
+		while (*dst != b) {
+			if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
+				ipri (oldpri);
+				return 1;
+			}
+		}
+		dst++;
+		src++;
+		cnt--;
+		ipri (oldpri);
+	}
+
+	return (0);
+}
diff --git a/board/dk1c20/u-boot.lds b/board/dk1c20/u-boot.lds
new file mode 100644
index 0000000..beedd54
--- /dev/null
+++ b/board/dk1c20/u-boot.lds
@@ -0,0 +1,70 @@
+/*
+ * (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
+ */
+
+
+OUTPUT_FORMAT("elf32-nios")
+OUTPUT_ARCH(nios)
+ENTRY(_start)
+
+SECTIONS
+{
+	.text :
+	{
+	  cpu/nios/start.o (.text)
+	  *(.text)
+	}
+        __text_end = .;
+
+        . = ALIGN(4);
+        .rodata :
+	{
+		*(.rodata)
+	}
+	__rodata_end = .;
+
+        . = ALIGN(4);
+        .data :
+	{
+		*(.data)
+	}
+	. = ALIGN(4);
+	__data_end = .;
+
+	__u_boot_cmd_start = .;
+	.u_boot_cmd :
+	{
+		*(.u_boot_cmd)
+	}
+	. = ALIGN(4);
+	__u_boot_cmd_end = .;
+
+	__bss_start = .;
+        . = ALIGN(4);
+        .bss :
+	{
+		*(.bss)
+	}
+	. = ALIGN(4);
+	__bss_end = .;
+}
+
diff --git a/board/dk1c20/vectors.S b/board/dk1c20/vectors.S
new file mode 100644
index 0000000..e2baaf5
--- /dev/null
+++ b/board/dk1c20/vectors.S
@@ -0,0 +1,124 @@
+/*
+ * (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
+ */
+
+
+/*************************************************************************
+ * Exception Vector Table
+ *
+ * This could have gone in the cpu soure tree, but the whole point of
+ * Nios is customization -- and polluting the cpu source tree with
+ * board-specific ifdef's really defeats the purpose, no? With this in
+ * the board-specific tree, each board has the freedom to organize
+ * vectors/traps, etc anyway it wants. The init code copies this table
+ * to the proper location.
+ *
+ * Each board can do what it likes here. But there are four "standard"
+ * handlers availble:
+ *
+ *	_cwp_lolimit	-Handles register window underflows.
+ *	_cwp_hilimit	-Handles register window overflows.
+ *	_timebase_int	-Increments the timebase.
+ *	_def_xhandler	-Default exception handler.
+ *
+ * _timebase_int handles a Nios Timer interrupt and increments the
+ * timestamp used for the get_timer(), reset_timer(), etc. routines. It
+ * expects the timer to be configured like the standard-32 low priority
+ * timer.
+ *
+ * _def_xhandler dispatches exceptions/traps via the external_interrupt()
+ * routine. This lets you use the irq_install_handler() and handle your
+ * interrupts/traps with code written in C.
+ ************************************************************************/
+
+	.data
+	.global _vectors
+	.align	4
+_vectors:
+
+	.long	_def_xhandler@h		/* Vector 0  - NMI */
+	.long	_cwp_lolimit@h		/* Vector 1  -  underflow */
+	.long	_cwp_hilimit@h		/* Vector 2  - overflow	*/
+
+	.long	_def_xhandler@h		/* Vector 3 - GNUPro debug */
+	.long	_def_xhandler@h		/* Vector 4 - GNUPro debug */
+	.long	_def_xhandler@h		/* Vector 5 - GNUPro debug */
+	.long	_def_xhandler@h		/* Vector 6 - future reserved */
+	.long	_def_xhandler@h		/* Vector 7 - future reserved */
+	.long	_def_xhandler@h		/* Vector 8 - future reserved */
+	.long	_def_xhandler@h		/* Vector 9 - future reserved */
+	.long	_def_xhandler@h		/* Vector 10 - future reserved */
+	.long	_def_xhandler@h		/* Vector 11 - future reserved */
+	.long	_def_xhandler@h		/* Vector 12 - future reserved */
+	.long	_def_xhandler@h		/* Vector 13 - future reserved */
+	.long	_def_xhandler@h		/* Vector 14 - future reserved */
+	.long	_def_xhandler@h		/* Vector 15 - future reserved */
+	.long	_def_xhandler@h		/* Vector 16 */
+	.long	_def_xhandler@h		/* Vector 17 */
+	.long	_def_xhandler@h		/* Vector 18 */
+	.long	_def_xhandler@h		/* Vector 19 */
+	.long	_def_xhandler@h		/* Vector 20 */
+	.long	_def_xhandler@h		/* Vector 21 */
+	.long	_def_xhandler@h		/* Vector 22 */
+	.long	_def_xhandler@h		/* Vector 23 */
+	.long	_def_xhandler@h		/* Vector 24 */
+	.long	_def_xhandler@h		/* Vector 25 */
+	.long	_def_xhandler@h		/* Vector 26 */
+	.long	_def_xhandler@h		/* Vector 27 */
+	.long	_def_xhandler@h		/* Vector 28 */
+	.long	_def_xhandler@h		/* Vector 29 */
+	.long	_def_xhandler@h		/* Vector 30 */
+	.long	_def_xhandler@h		/* Vector 31 */
+	.long	_def_xhandler@h		/* Vector 32 */
+	.long	_def_xhandler@h		/* Vector 33 */
+	.long	_def_xhandler@h		/* Vector 34 */
+	.long	_def_xhandler@h		/* Vector 35 */
+	.long	_def_xhandler@h		/* Vector 36 */
+	.long	_def_xhandler@h		/* Vector 37 */
+	.long	_def_xhandler@h		/* Vector 38 */
+	.long	_def_xhandler@h		/* Vector 39 */
+	.long	_def_xhandler@h		/* Vector 40 */
+	.long	_def_xhandler@h		/* Vector 41 */
+	.long	_def_xhandler@h		/* Vector 42 */
+	.long	_def_xhandler@h		/* Vector 43 */
+	.long	_def_xhandler@h		/* Vector 44 */
+	.long	_def_xhandler@h		/* Vector 45 */
+	.long	_def_xhandler@h		/* Vector 46 */
+	.long	_def_xhandler@h		/* Vector 47 */
+	.long	_def_xhandler@h		/* Vector 48 */
+	.long	_def_xhandler@h		/* Vector 49 */
+	.long	_timebase_int@h		/* Vector 50 - lopri timer*/
+	.long	_def_xhandler@h		/* Vector 51 */
+	.long	_def_xhandler@h		/* Vector 52 */
+	.long	_def_xhandler@h		/* Vector 53 */
+	.long	_def_xhandler@h		/* Vector 54 */
+	.long	_def_xhandler@h		/* Vector 55 */
+	.long	_def_xhandler@h		/* Vector 56 */
+	.long	_def_xhandler@h		/* Vector 57 */
+	.long	_def_xhandler@h		/* Vector 58 */
+	.long	_def_xhandler@h		/* Vector 59 */
+	.long	_def_xhandler@h		/* Vector 60 */
+	.long	_def_xhandler@h		/* Vector 61 */
+	.long	_def_xhandler@h		/* Vector 62 */
+	.long	_def_xhandler@h		/* Vector 63 */
+
+