- 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 boardmaster
parent
54387ac931
commit
4a5517094d
@ -0,0 +1,48 @@ |
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#
|
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# (C) Copyright 2001
|
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# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
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#
|
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# See file CREDITS for list of people who contributed to this
|
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# project.
|
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#
|
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# This program is free software; you can redistribute it and/or
|
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# modify it under the terms of the GNU General Public License as
|
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# published by the Free Software Foundation; either version 2 of
|
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# the License, or (at your option) any later version.
|
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#
|
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# This program is distributed in the hope that it will be useful,
|
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
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# GNU General Public License for more details.
|
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#
|
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# You should have received a copy of the GNU General Public License
|
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# along with this program; if not, write to the Free Software
|
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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# MA 02111-1307 USA
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#
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include $(TOPDIR)/config.mk |
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LIB = lib$(BOARD).a
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OBJS := $(BOARD).o flash.o
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SOBJS = vectors.o
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$(LIB): $(OBJS) $(SOBJS) |
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$(AR) crv $@ $^
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clean: |
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rm -f $(SOBJS) $(OBJS)
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distclean: clean |
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rm -f $(LIB) core *.bak .depend
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#########################################################################
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.depend: Makefile $(SOBJS:.o=.S) $(OBJS:.o=.c) |
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$(CC) -M $(CPPFLAGS) $(SOBJS:.o=.S) $(OBJS:.o=.c) > $@
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|
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-include .depend |
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|
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#########################################################################
|
@ -0,0 +1,30 @@ |
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#
|
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# (C) Copyright 2003
|
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# Psyent Corporation
|
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# Scott McNutt <smcnutt@psyent.com>
|
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#
|
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# See file CREDITS for list of people who contributed to this
|
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# project.
|
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#
|
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# This program is free software; you can redistribute it and/or
|
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# modify it under the terms of the GNU General Public License as
|
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# published by the Free Software Foundation; either version 2 of
|
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# the License, or (at your option) any later version.
|
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#
|
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# This program is distributed in the hope that it will be useful,
|
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
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# GNU General Public License for more details.
|
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#
|
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# You should have received a copy of the GNU General Public License
|
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# along with this program; if not, write to the Free Software
|
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
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# MA 02111-1307 USA
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#
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|
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TEXT_BASE = 0x018c0000
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|
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ifeq ($(debug),1) |
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PLATFORM_CPPFLAGS += -DDEBUG
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endif |
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|
@ -0,0 +1,45 @@ |
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/*
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* (C) Copyright 2003, Psyent Corporation <www.psyent.com> |
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* Scott McNutt <smcnutt@psyent.com> |
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* |
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* See file CREDITS for list of people who contributed to this |
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* project. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation; either version 2 of |
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* the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
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* MA 02111-1307 USA |
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*/ |
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|
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#include <common.h> |
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void _default_hdlr (void) |
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{ |
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printf ("default_hdlr\n"); |
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} |
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|
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int board_pre_init (void) |
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{ |
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return 0; |
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} |
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|
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int checkboard (void) |
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{ |
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puts ("Board: Altera Nios 1C20 Development Kit\n"); |
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return 0; |
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} |
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|
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long int initdram (int board_type) |
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{ |
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return (0); |
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} |
@ -0,0 +1,226 @@ |
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/*
|
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* (C) Copyright 2000 |
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
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* |
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* See file CREDITS for list of people who contributed to this |
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* project. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation; either version 2 of |
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* the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
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* MA 02111-1307 USA |
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*/ |
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#include <common.h> |
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#include <nios.h> |
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/*---------------------------------------------------------------------*/ |
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#define BANKSZ (8 * 1024 * 1024) |
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#define SECTSZ (64 * 1024) |
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#define USERFLASH (2 * 1024 * 1024) /* bottom 2 MB for user */ |
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flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; |
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#define FLASH_WORD_SIZE unsigned char |
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/*---------------------------------------------------------------------*/ |
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unsigned long flash_init (void) |
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{ |
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int i; |
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unsigned long addr; |
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flash_info_t *fli = &flash_info[0]; |
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fli->size = BANKSZ; |
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fli->sector_count = CFG_MAX_FLASH_SECT; |
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fli->flash_id = FLASH_MAN_AMD; |
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addr = CFG_FLASH_BASE; |
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for (i = 0; i < fli->sector_count; ++i) { |
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fli->start[i] = addr; |
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addr += SECTSZ; |
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/* Protect all but 2 MByte user area */ |
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if (addr < (CFG_FLASH_BASE + USERFLASH)) |
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fli->protect[i] = 0; |
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else |
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fli->protect[i] = 1; |
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} |
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return (BANKSZ); |
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} |
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/*--------------------------------------------------------------------*/ |
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void flash_print_info (flash_info_t * info) |
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{ |
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int i, k; |
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unsigned long size; |
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int erased; |
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volatile unsigned char *flash; |
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printf (" Size: %ld KB in %d Sectors\n", |
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info->size >> 10, info->sector_count); |
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printf (" Sector Start Addresses:"); |
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for (i = 0; i < info->sector_count; ++i) { |
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|
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/* Check if whole sector is erased */ |
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if (i != (info->sector_count - 1)) |
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size = info->start[i + 1] - info->start[i]; |
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else |
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size = info->start[0] + info->size - info->start[i]; |
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erased = 1; |
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flash = (volatile unsigned char *) info->start[i]; |
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for (k = 0; k < size; k++) { |
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if (*flash++ != 0xff) { |
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erased = 0; |
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break; |
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} |
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} |
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/* Print the info */ |
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if ((i % 5) == 0) |
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printf ("\n "); |
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printf (" %08lX%s%s", info->start[i], erased ? " E" : " ", |
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info->protect[i] ? "RO " : " "); |
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} |
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printf ("\n"); |
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} |
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/*-------------------------------------------------------------------*/ |
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int flash_erase (flash_info_t * info, int s_first, int s_last) |
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{ |
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volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[0]); |
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volatile FLASH_WORD_SIZE *addr2; |
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int prot, sect; |
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int any = 0; |
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unsigned oldpri; |
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ulong start; |
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/* Some sanity checking */ |
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if ((s_first < 0) || (s_first > s_last)) { |
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printf ("- no sectors to erase\n"); |
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return 1; |
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} |
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prot = 0; |
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for (sect = s_first; sect <= s_last; ++sect) { |
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if (info->protect[sect]) { |
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prot++; |
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} |
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} |
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if (prot) { |
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printf ("- Warning: %d protected sectors will not be erased!\n", |
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prot); |
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} else { |
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printf ("\n"); |
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} |
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/* NOTE: disabling interrupts on Nios can be very bad since it
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* also disables the LO_LIMIT exception. It's better here to |
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* set the interrupt priority to 3 & restore it when we're done. |
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*/ |
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oldpri = ipri (3); |
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/* It's ok to erase multiple sectors provided we don't delay more
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* than 50 usec between cmds ... at which point the erase time-out |
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* occurs. So don't go and put printf() calls in the loop ... it |
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* won't be very helpful ;-) |
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*/ |
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for (sect = s_first; sect <= s_last; sect++) { |
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if (info->protect[sect] == 0) { /* not protected */ |
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addr2 = (FLASH_WORD_SIZE *) (info->start[sect]); |
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*addr = 0xaa; |
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*addr = 0x55; |
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*addr = 0x80; |
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*addr = 0xaa; |
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*addr = 0x55; |
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*addr2 = 0x30; |
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any = 1; |
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} |
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} |
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/* Now just wait for 0xff & provide some user feedback while
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* we wait. |
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*/ |
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if (any) { |
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addr2 = (FLASH_WORD_SIZE *) (info->start[sect]); |
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start = get_timer (0); |
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while (*addr2 != 0xff) { |
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udelay (1000 * 1000); |
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putc ('.'); |
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if (get_timer (start) > CFG_FLASH_ERASE_TOUT) { |
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printf ("timeout\n"); |
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return 1; |
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} |
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} |
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printf ("\n"); |
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} |
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/* Restore interrupt priority */ |
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ipri (oldpri); |
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return 0; |
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} |
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|
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/*-----------------------------------------------------------------------
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* Copy memory to flash, returns: |
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* 0 - OK |
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* 1 - write timeout |
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* 2 - Flash not erased |
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*/ |
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int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) |
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{ |
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|
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vu_char *cmd = (vu_char *) info->start[0]; |
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vu_char *dst = (vu_char *) addr; |
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unsigned char b; |
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unsigned oldpri; |
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ulong start; |
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|
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while (cnt) { |
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/* Check for sufficient erase */ |
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b = *src; |
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if ((*dst & b) != b) { |
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printf ("%02x : %02x\n", *dst, b); |
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return (2); |
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} |
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|
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/* Disable interrupts other than window underflow
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* (interrupt priority 2) |
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*/ |
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oldpri = ipri (3); |
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*cmd = 0xaa; |
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*cmd = 0x55; |
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*cmd = 0xa0; |
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*dst = b; |
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|
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/* Verify write */ |
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start = get_timer (0); |
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while (*dst != b) { |
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if (get_timer (start) > CFG_FLASH_WRITE_TOUT) { |
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ipri (oldpri); |
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return 1; |
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} |
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} |
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dst++; |
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src++; |
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cnt--; |
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ipri (oldpri); |
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} |
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|
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return (0); |
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} |
@ -0,0 +1,70 @@ |
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/* |
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* (C) Copyright 2003, Psyent Corporation <www.psyent.com> |
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* 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 |
||||
*/ |
||||
|
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|
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OUTPUT_FORMAT("elf32-nios") |
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OUTPUT_ARCH(nios) |
||||
ENTRY(_start) |
||||
|
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SECTIONS |
||||
{ |
||||
.text : |
||||
{ |
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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 = .; |
||||
} |
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|
@ -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 */
|
||||
|
||||
|
@ -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 $(TOPDIR)/config.mk |
||||
|
||||
LIB = lib$(CPU).a
|
||||
|
||||
START = start.o
|
||||
AOBJS = traps.o
|
||||
OBJS = cpu.o interrupts.o serial.o
|
||||
|
||||
all: .depend $(START) $(LIB) |
||||
|
||||
$(LIB): $(OBJS) $(AOBJS) |
||||
$(AR) crv $@ $(OBJS) $(AOBJS)
|
||||
|
||||
#########################################################################
|
||||
|
||||
.depend: Makefile $(START:.o=.S) $(OBJS:.o=.c) $(AOBJS:.o=.S) |
||||
$(CC) -M $(CFLAGS) $(START:.o=.S) $(OBJS:.o=.c) $(AOBJS:.o=.S) > $@
|
||||
|
||||
sinclude .depend |
||||
|
||||
#########################################################################
|
@ -0,0 +1,25 @@ |
||||
#
|
||||
# (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 +=
|
||||
|
@ -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); |
||||
printf ("CPU: "); |
||||
printf ("%s", (val & 0x00008000) ? "Nios-16 " : "Nios-32 "); |
||||
rev_major = (val>>12) & 0x07; |
||||
rev_minor = val & 0x0f; |
||||
printf ("Rev. %d.%02d (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 */ |
@ -0,0 +1,184 @@ |
||||
/*
|
||||
* (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> |
||||
|
||||
/****************************************************************************/ |
||||
|
||||
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) |
||||
{ |
||||
return (timestamp - base); |
||||
} |
||||
|
||||
void set_timer (ulong t) |
||||
{ |
||||
timestamp = t; |
||||
} |
||||
|
||||
|
||||
/* The board must handle this interrupt if a timer is not
|
||||
* provided. |
||||
*/ |
||||
#if defined(CFG_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 *)CFG_NIOS_TMRBASE; |
||||
tmr->status = 0; |
||||
timestamp += CFG_NIOS_TMRMS; |
||||
} |
||||
#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(CFG_NIOS_TMRBASE) |
||||
nios_timer_t *tmr = (nios_timer_t *)CFG_NIOS_TMRBASE; |
||||
|
||||
tmr->control &= ~NIOS_TIMER_ITO; |
||||
tmr->control |= NIOS_TIMER_STOP; |
||||
#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(CFG_NIOS_TMRBASE) |
||||
tmr->control |= ( NIOS_TIMER_ITO | |
||||
NIOS_TIMER_CONT | |
||||
NIOS_TIMER_START ); |
||||
ipri (CFG_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 (CONFIG_COMMANDS & CFG_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 CouIt's ok to cnt\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 /* CONFIG_COMMANDS & CFG_CMD_IRQ */ |
@ -0,0 +1,86 @@ |
||||
/*
|
||||
* (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-io.h> |
||||
|
||||
|
||||
static nios_uart_t *uart = (nios_uart_t *)CFG_NIOS_CONSOLE; |
||||
|
||||
#if defined(CFG_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 ) |
||||
{ |
||||
DECLARE_GLOBAL_DATA_PTR; |
||||
unsigned div; |
||||
|
||||
div = (CONFIG_SYS_CLK_FREQ/gd->baudrate)-1; |
||||
uart->divisor = div; |
||||
return; |
||||
} |
||||
|
||||
int serial_init( void ) |
||||
{ |
||||
serial_setbrg(); |
||||
return(0); |
||||
} |
||||
|
||||
#endif /* CFG_NIOS_FIXEDBAUD */ |
||||
|
||||
|
||||
void serial_putc( char c ) |
||||
{ |
||||
if (c == '\n') |
||||
serial_putc('\r'); |
||||
while( (uart->status & NIOS_UART_TRDY) == 0 ) |
||||
; |
||||
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 ) |
||||
; |
||||
return( uart->rxdata & 0x00ff ); |
||||
} |
@ -0,0 +1,186 @@ |
||||
/* |
||||
* (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 <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(CFG_INIT_SP) |
||||
movi %sp, %lo(CFG_INIT_SP) |
||||
pfx %xhi(CFG_INIT_SP) |
||||
movhi %sp, %xlo(CFG_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 */ |
||||
|
||||
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 |
||||
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: |
||||
|
||||
/* |
||||
* 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 " (", __DATE__, " - ", __TIME__, ")" |
||||
.ascii CONFIG_IDENT_STRING, "\0" |
@ -0,0 +1,559 @@ |
||||
/* |
||||
* (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 */ |
@ -0,0 +1,84 @@ |
||||
|
||||
Nios Development Kit |
||||
Cyclone Editions |
||||
|
||||
Last Update: October 4, 2003 |
||||
==================================================================== |
||||
|
||||
This file contains information regarding U-Boot and the Altera |
||||
Nios Development Kit, Cyclone Edition (DK-1C20). For general Nios |
||||
information see doc/README.nios. |
||||
|
||||
For those interested in contributing ... see HELP WANTED section |
||||
in doc/README.nios. |
||||
|
||||
|
||||
Files |
||||
------ |
||||
board/dk1c20/* |
||||
include/configs/DK1C20.h |
||||
|
||||
Memory Organization |
||||
-------------------- |
||||
|
||||
-The heap is placed below the monitor (U-Boot code). |
||||
-Global data is placed below the heap. |
||||
-The stack is placed below global data (&grows down). |
||||
|
||||
Misc |
||||
----- |
||||
|
||||
The hello_world example works fine. |
||||
|
||||
|
||||
Programming U-Boot into FLASH with GERMS |
||||
----------------------------------------- |
||||
The current version of the DK-1C20 port occupies less than |
||||
60 KByte. So everything will fit into a single Flash sector. |
||||
To program U-Boot into the DK-1C20 flash using GERMS do the |
||||
following: |
||||
|
||||
1. From the command line, download U-Boot using the nios-run: |
||||
|
||||
$ nios-run -r u-boot.srec |
||||
|
||||
This takes about 45 seconds (GERMS is not very speedy here). |
||||
After u-boot is downloaded it will be executed. You should |
||||
see the following: |
||||
|
||||
U-Boot 1.0.0-pre (Oct 4 2003 - 07:39:24) |
||||
|
||||
CPU: Nios-32 Rev. 3.08 (0x3018) |
||||
Reg file size: 256 LO_LIMIT/HI_LIMIT: 2/14 |
||||
Board: Altera Nios 1C20 Development Kit |
||||
In: serial |
||||
Out: serial |
||||
Err: serial |
||||
==> |
||||
|
||||
|
||||
2. Quit nios-run and start your terminal application (e.g. start |
||||
Hyperterminal or minicom). |
||||
|
||||
3. From the U-Boot command prompt, erase a sector of flash at 0x40000: |
||||
|
||||
==> erase 40000 4ffff |
||||
|
||||
4. Download the u-boot code to RAM. When using Hyperterminal, do the |
||||
following: |
||||
|
||||
--From the u-boot command prompt start a binary download to SRAM: |
||||
|
||||
==> loadb 800000 |
||||
|
||||
--Download u-boot.bin using kermit. |
||||
|
||||
5. Copy the binary image from SRAM to flash: |
||||
|
||||
==> cp.b 800000 40000 10000 |
||||
|
||||
U-Boot will now automatically start when the board is powered on or |
||||
reset using the Standard-32 configuration. To start U-Boot with the |
||||
Safe-32 configuration, enter the following GERMS command: |
||||
|
||||
+ g 40000 |
@ -0,0 +1,196 @@ |
||||
|
||||
U-Boot for Nios-32 |
||||
|
||||
Last Update: October 4, 2003 |
||||
==================================================================== |
||||
|
||||
This file contains information regarding U-Boot and the Altera |
||||
Nios CPU. For information regarding U-Boot and the Nios Development |
||||
Kit, Cyclone Edition (DK-1C20), see doc/README.dk1c20. |
||||
|
||||
For those interested in contributing ... see HELP WANTED below. |
||||
|
||||
|
||||
1. OVERVIEW |
||||
------------ |
||||
|
||||
U-Boot has been successfully tested on the Nios Cyclone development |
||||
board using both the 'safe' and 'standard 32' configurations with |
||||
Nios CPU revision 3.08 (CPU_ID = 0x3008). U-Boot can be used with |
||||
or without the GERMS monitor. The initial version of U-Boot for the |
||||
Cyclone development kit is about 60 Kbyte and will fit in a single |
||||
sector of on-board FLASH. Only the Nios 32-bit CPU is supported. |
||||
|
||||
1.1 GERMS Monitor |
||||
------------------ |
||||
If GERMS is just not enough, then U-Boot is a great antibiotic. |
||||
You will be very pleased with its high degree of configurability |
||||
and its rich feature set. |
||||
|
||||
A few of the most obvious limitations of GERMS are overcome by |
||||
using U-Boot (See 'Brain Damage'). Most notably, you can use |
||||
minicom or Hyperterminal (duh). |
||||
|
||||
1.2 Altera Source Code |
||||
----------------------- |
||||
The Nios port does NOT include ANY sources that Altera has the |
||||
copyright. This was a conscious decision ... not an accident. |
||||
The Altera license is not clear in terms of distributing Altera |
||||
sources (when altera silicon is not involved). This isn't really |
||||
a problem as little, if any, of the Altera source contains |
||||
features that are not already available in U-Boot. |
||||
|
||||
The Nios port also does not use the long-winded peripheral |
||||
structure definitions from the Nios SDK. |
||||
|
||||
|
||||
|
||||
2. CONFIGURATION OPTIONS/SETTINGS |
||||
---------------------------------- |
||||
|
||||
2.1 Nios-specific Options/Settings |
||||
----------------------------------- |
||||
All configuration options/settings that are specific to Nios begin |
||||
with "CONFIG_NIOS_" or "CFG_NIOS_". The following is a list of |
||||
currently defined Nios-specific options/parameters. If any options |
||||
are related to Standard-32 Nios SDK excalibur.h definitions, the |
||||
related definition follows the description). |
||||
|
||||
|
||||
CONFIG_NIOS -- defined for all Nios-32 boards. |
||||
|
||||
CFG_NIOS_CONSOLE -- the base address of the console UART. |
||||
(standard-32: na_uart1_base). |
||||
|
||||
CFG_NIOS_FIXEDBAUD -- defined if the console UART PTF fixed_baud |
||||
parameter is set to '1'. |
||||
|
||||
CFG_NIOS_MULT_HW -- use full hardware multiply (not yet implemented). |
||||
|
||||
CFG_NIOS_MULT_MSTEP -- use hardware assisted multiply using the |
||||
MSTEP instruction (not yet implemented). |
||||
|
||||
CFG_NIOS_TMRBASE -- the base address of the timer used to support |
||||
xxx_timer routines (e.g. set_timer(), get_timer(), etc.). |
||||
(standard-32: na_lo_priority_timer2_base). |
||||
|
||||
CFG_NIOS_TMRIRQ -- the interrupt request (vector number) assigned to |
||||
the timer. (standard-32: na_low_priority_timer2_irq). |
||||
|
||||
CFG_NIOS_TMRMS -- the period of the timer in milliseconds. |
||||
|
||||
2.2 Differences in U-Boot Options/Settings |
||||
------------------------------------------- |
||||
Some 'standard' U-Boot options/settings are treated differently in |
||||
the Nios port. These are described below. |
||||
|
||||
CFG_GBL_DATA_OFFSET -- in the Nios port, this is the offset of the |
||||
global data structure in the Nios memory space. More simply, |
||||
the address of global data. |
||||
|
||||
|
||||
3. ASSEMBLY CODING |
||||
------------------- |
||||
|
||||
In browsing the assembly source files, you may notice the absence |
||||
of the 'magic macros' (e.g. MOVIA, MOVIP, ADDIP etc.). This is |
||||
deliberate. The documentation for the magic macros is scant and |
||||
it is hard to find ... it does not appear in the Nios programmer's |
||||
manual, nor does it appear in the assembler manual. Regardless, |
||||
the macros actually do very little to improve readability anyway. |
||||
|
||||
With this in mind, all assembler modules use only instructions that |
||||
appear in the Nios programmer's manual OR are directly supported |
||||
by the nios-elf toolchain. For example, the 'dec %rB' instruction |
||||
is an alias for 'subi %rB,1' that is supported by the assembler |
||||
but does not appear in the programmer's manual. |
||||
|
||||
|
||||
4. BRAIN DAMAGE |
||||
---------------- |
||||
|
||||
This section describes some of the unfortunate and avoidable aspects |
||||
of working with the Nios CPU ... and some things you can do to |
||||
reduce your pain. |
||||
|
||||
4.1 GERMS doesn't work with Hyperterminal |
||||
------------------------------------------ |
||||
GERMS doesn't do CR/LF mapping that is compatible with Hyperterminal |
||||
(or minicom) -- geez. Regardless of you opion of Hyperterminal, this |
||||
sad design decision is remedied by using U-Boot. |
||||
|
||||
4.2 cygwin Incompatibility |
||||
--------------------------- |
||||
The version of cygwin distributed with the nios GNUPro toolchain is |
||||
out-of-date and incompatible with the latest cygwin distributions. |
||||
In addition, many of the standard utilities are very dated as well. |
||||
If you try to download and build the lastest version of grep for |
||||
example, you'll quickly realize that a native gcc is not available |
||||
(the next topic) which leads to U-Boot build problems (following |
||||
topic). |
||||
|
||||
The solution ... well, you can wait for Altera ... or build as |
||||
set of tools for linux. |
||||
|
||||
4.3 No native gcc |
||||
------------------ |
||||
I'm not sure how this one slipped through the cracks ... but it is |
||||
a real pain. Basically, if you want to build anything for the native |
||||
environment -- forget it! A native (cygwin) gcc is not distributed, |
||||
and the old version of cygwin makes locating one challenging. |
||||
|
||||
The solution ... same as above. Just download the gcc source from |
||||
Altera and build up a set of cross tools for your favorite linux |
||||
distro. |
||||
|
||||
4.4 Can't build default U-Boot |
||||
------------------------------- |
||||
By default, when you build U-Boot you will be building some native |
||||
tools along with the target elf, bin, and srec files. Without a |
||||
native gcc, this (obviously) causes problems. |
||||
|
||||
For developers using the Altera cygwin tools you can remove the |
||||
'tools' directory from SUBDIRS in the top-level Makefile. You will |
||||
also have to edit common/Makefile: |
||||
|
||||
Replace: |
||||
environment.o: environment.c ../tools/envcrc |
||||
$(CC) $(AFLAGS) -Wa,--no-warn \ |
||||
-DENV_CRC=$(shell ../tools/envcrc) \ |
||||
-c -o $@ environment.c |
||||
|
||||
With: |
||||
environment.o: environment.c ../tools/envcrc |
||||
$(CC) $(AFLAGS) -Wa,--no-warn \ |
||||
-DENV_CRC=0 \ |
||||
-c -o $@ environment.c |
||||
|
||||
BTW, thats a 'zero' ... not the letter 'O'. |
||||
|
||||
|
||||
5. HELP WANTED |
||||
--------------- |
||||
|
||||
There are plenty of areas where help is needed. Here's are some ideas |
||||
for those interested in contributing: |
||||
|
||||
-SMC 91C111 support. E.g. add in tftpboot, etc. |
||||
|
||||
-CompactFlash. Port & test CF/FAT. |
||||
|
||||
-ASMI support. Use ASMI for environment, etc. |
||||
|
||||
-Bedbug. Develop bedbug for Nios ... or at least provide a disassemble |
||||
command. |
||||
|
||||
-Add boot support for ucLinux (niosnommu). |
||||
|
||||
-Implement (don't copy Altera code) the __mulxx routines using the |
||||
MSTEP and MUL instructions (e.g. CFG_NIOS_MULT_HW and CFG_NIOS_MULT_MSTEP). |
||||
|
||||
|
||||
|
||||
Regards, |
||||
|
||||
--Scott |
||||
<smcnutt@psyent.com> |
@ -0,0 +1,61 @@ |
||||
/* |
||||
* (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 : |
||||
{ |
||||
*(.text) |
||||
} |
||||
__text_end = .; |
||||
|
||||
. = ALIGN(4); |
||||
.rodata : |
||||
{ |
||||
*(.rodata) |
||||
} |
||||
__rodata_end = .; |
||||
|
||||
. = ALIGN(4); |
||||
.data : |
||||
{ |
||||
*(.data) |
||||
} |
||||
. = ALIGN(4); |
||||
__data_end = .; |
||||
|
||||
__bss_start = .; |
||||
. = ALIGN(4); |
||||
.bss : |
||||
{ |
||||
*(.bss) |
||||
} |
||||
. = ALIGN(4); |
||||
__bss_end = .; |
||||
} |
||||
|
@ -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 |
||||
*/ |
||||
|
||||
#ifndef _ASM_NIOS_BITOPS_H_ |
||||
#define _ASM_NIOS_BITOPS_H_ |
||||
|
||||
|
||||
extern void set_bit(int nr, volatile void * a); |
||||
extern void clear_bit(int nr, volatile void * a); |
||||
extern int test_and_clear_bit(int nr, volatile void * a); |
||||
extern void change_bit(unsigned long nr, volatile void *addr); |
||||
extern int test_and_set_bit(int nr, volatile void * a); |
||||
extern int test_and_change_bit(int nr, volatile void * addr); |
||||
extern int test_bit(int nr, volatile void * a); |
||||
extern int ffs(int i); |
||||
|
||||
#endif /* _ASM_NIOS_BITOPS_H */ |
@ -0,0 +1,31 @@ |
||||
/*
|
||||
* (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 |
||||
*/ |
||||
|
||||
#ifndef __ASM_NIOS_BYTEORDER_H |
||||
#define __ASM_NIOS_BYTEORDER_H |
||||
|
||||
#include <asm/types.h> |
||||
#include <linux/byteorder/little_endian.h> |
||||
|
||||
#endif |
||||
|
@ -0,0 +1,46 @@ |
||||
/*
|
||||
* (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 |
||||
*/ |
||||
|
||||
#ifndef __ASM_NIOS_GLOBALDATA_H |
||||
#define __ASM_NIOS_GLOBALDATA_H |
||||
|
||||
typedef struct global_data { |
||||
bd_t *bd; |
||||
unsigned long flags; |
||||
unsigned long baudrate; |
||||
unsigned long cpu_clk; /* CPU clock in Hz! */ |
||||
unsigned long have_console; /* serial_init() was called */ |
||||
unsigned long ram_size; /* RAM size */ |
||||
unsigned long reloc_off; /* Relocation Offset */ |
||||
unsigned long env_addr; /* Address of Environment struct */ |
||||
unsigned long env_valid; /* Checksum of Environment valid */ |
||||
void **jt; /* Standalone app jump table */ |
||||
} gd_t; |
||||
|
||||
/* flags */ |
||||
#define GD_FLG_RELOC 0x00001 /* Code was relocated to RAM */ |
||||
#define GD_FLG_DEVINIT 0x00002 /* Devices have been initialized */ |
||||
|
||||
#define DECLARE_GLOBAL_DATA_PTR register gd_t *gd asm ("%g7") |
||||
|
||||
#endif /* __ASM_NIOS_GLOBALDATA_H */ |
@ -0,0 +1 @@ |
||||
/*FIXME: Implement this! */ |
@ -0,0 +1,63 @@ |
||||
#ifndef __ASM_NIOS_POSIX_TYPES_H |
||||
#define __ASM_NIOS_POSIX_TYPES_H |
||||
|
||||
/*
|
||||
* This file is generally used by user-level software, so you need to |
||||
* be a little careful about namespace pollution etc. Also, we cannot |
||||
* assume GCC is being used. |
||||
*/ |
||||
|
||||
typedef unsigned short __kernel_dev_t; |
||||
typedef unsigned long __kernel_ino_t; |
||||
typedef unsigned short __kernel_mode_t; |
||||
typedef unsigned short __kernel_nlink_t; |
||||
typedef long __kernel_off_t; |
||||
typedef int __kernel_pid_t; |
||||
typedef unsigned short __kernel_ipc_pid_t; |
||||
typedef unsigned short __kernel_uid_t; |
||||
typedef unsigned short __kernel_gid_t; |
||||
typedef unsigned long __kernel_size_t; |
||||
typedef int __kernel_ssize_t; |
||||
typedef int __kernel_ptrdiff_t; |
||||
typedef long __kernel_time_t; |
||||
typedef long __kernel_suseconds_t; |
||||
typedef long __kernel_clock_t; |
||||
typedef int __kernel_daddr_t; |
||||
typedef char * __kernel_caddr_t; |
||||
typedef unsigned short __kernel_uid16_t; |
||||
typedef unsigned short __kernel_gid16_t; |
||||
typedef unsigned int __kernel_uid32_t; |
||||
typedef unsigned int __kernel_gid32_t; |
||||
|
||||
typedef unsigned short __kernel_old_uid_t; |
||||
typedef unsigned short __kernel_old_gid_t; |
||||
|
||||
#ifdef __GNUC__ |
||||
typedef long long __kernel_loff_t; |
||||
#endif |
||||
|
||||
typedef struct { |
||||
#if defined(__KERNEL__) || defined(__USE_ALL) |
||||
int val[2]; |
||||
#else /* !defined(__KERNEL__) && !defined(__USE_ALL) */ |
||||
int __val[2]; |
||||
#endif /* !defined(__KERNEL__) && !defined(__USE_ALL) */ |
||||
} __kernel_fsid_t; |
||||
|
||||
#if defined(__KERNEL__) || !defined(__GLIBC__) || (__GLIBC__ < 2) |
||||
|
||||
#undef __FD_SET |
||||
#define __FD_SET(d, set) ((set)->fds_bits[__FDELT(d)] |= __FDMASK(d)) |
||||
|
||||
#undef __FD_CLR |
||||
#define __FD_CLR(d, set) ((set)->fds_bits[__FDELT(d)] &= ~__FDMASK(d)) |
||||
|
||||
#undef __FD_ISSET |
||||
#define __FD_ISSET(d, set) ((set)->fds_bits[__FDELT(d)] & __FDMASK(d)) |
||||
|
||||
#undef __FD_ZERO |
||||
#define __FD_ZERO(fdsetp) (memset (fdsetp, 0, sizeof(*(fd_set *)fdsetp))) |
||||
|
||||
#endif /* defined(__KERNEL__) || !defined(__GLIBC__) || (__GLIBC__ < 2) */ |
||||
|
||||
#endif |
@ -0,0 +1 @@ |
||||
/* FIXME: Implement this! */ |
@ -0,0 +1,29 @@ |
||||
/*
|
||||
* (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 |
||||
*/ |
||||
|
||||
#ifndef _NIOS_PSR_H |
||||
#define _NIOS_PSR_H |
||||
|
||||
|
||||
|
||||
#endif /* _NIOS_PSR_H */ |
@ -0,0 +1,36 @@ |
||||
/*
|
||||
* (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 |
||||
*/ |
||||
|
||||
#ifndef _NIOS_PTRACE_H |
||||
#define _NIOS_PTRACE_H |
||||
|
||||
struct pt_regs { |
||||
unsigned global[8]; |
||||
unsigned in[8]; |
||||
unsigned status; |
||||
unsigned istatus; |
||||
unsigned retaddr; |
||||
}; |
||||
|
||||
|
||||
#endif /* _NIOS_PTRACE_H */ |
@ -0,0 +1,25 @@ |
||||
#ifndef __ASM_NIOS_STRING_H |
||||
#define __ASM_NIOS_STRING_H |
||||
|
||||
#undef __HAVE_ARCH_STRRCHR |
||||
extern char * strrchr(const char * s, int c); |
||||
|
||||
#undef __HAVE_ARCH_STRCHR |
||||
extern char * strchr(const char * s, int c); |
||||
|
||||
#undef __HAVE_ARCH_MEMCPY |
||||
extern void * memcpy(void *, const void *, __kernel_size_t); |
||||
|
||||
#undef __HAVE_ARCH_MEMMOVE |
||||
extern void * memmove(void *, const void *, __kernel_size_t); |
||||
|
||||
#undef __HAVE_ARCH_MEMCHR |
||||
extern void * memchr(const void *, int, __kernel_size_t); |
||||
|
||||
#undef __HAVE_ARCH_MEMSET |
||||
extern void * memset(void *, int, __kernel_size_t); |
||||
|
||||
#undef __HAVE_ARCH_MEMZERO |
||||
extern void memzero(void *ptr, __kernel_size_t n); |
||||
|
||||
#endif |
@ -0,0 +1,4 @@ |
||||
#ifndef _ASM_NIOS_SYSTEM_H_ |
||||
#define _ASM_NIOS_SYSTEM_H_ |
||||
|
||||
#endif /* _ASM_NIOS_SYSTEM_H */ |
@ -0,0 +1,57 @@ |
||||
#ifndef _NIOS_TYPES_H |
||||
#define _NIOS_TYPES_H |
||||
|
||||
/*
|
||||
* This file is never included by application software unless |
||||
* explicitly requested (e.g., via linux/types.h) in which case the |
||||
* application is Linux specific so (user-) name space pollution is |
||||
* not a major issue. However, for interoperability, libraries still |
||||
* need to be careful to avoid a name clashes. |
||||
*/ |
||||
|
||||
typedef unsigned short umode_t; |
||||
|
||||
/*
|
||||
* __xx is ok: it doesn't pollute the POSIX namespace. Use these in the |
||||
* header files exported to user space |
||||
*/ |
||||
|
||||
typedef __signed__ char __s8; |
||||
typedef unsigned char __u8; |
||||
|
||||
typedef __signed__ short __s16; |
||||
typedef unsigned short __u16; |
||||
|
||||
typedef __signed__ int __s32; |
||||
typedef unsigned int __u32; |
||||
|
||||
#if defined(__GNUC__) && !defined(__STRICT_ANSI__) |
||||
typedef __signed__ long long __s64; |
||||
typedef unsigned long long __u64; |
||||
#endif |
||||
|
||||
/*
|
||||
* These aren't exported outside the kernel to avoid name space clashes |
||||
*/ |
||||
#ifdef __KERNEL__ |
||||
|
||||
typedef signed char s8; |
||||
typedef unsigned char u8; |
||||
|
||||
typedef signed short s16; |
||||
typedef unsigned short u16; |
||||
|
||||
typedef signed int s32; |
||||
typedef unsigned int u32; |
||||
|
||||
typedef signed long long s64; |
||||
typedef unsigned long long u64; |
||||
|
||||
#define BITS_PER_LONG 32 |
||||
|
||||
/* Dma addresses are 32-bits wide. */ |
||||
|
||||
typedef u32 dma_addr_t; |
||||
#endif /* __KERNEL__ */ |
||||
|
||||
#endif /* _NIOS_TYPES_H */ |
@ -0,0 +1,42 @@ |
||||
/*
|
||||
* (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 |
||||
*/ |
||||
|
||||
#ifndef _U_BOOT_H_ |
||||
#define _U_BOOT_H_ |
||||
|
||||
typedef struct bd_info { |
||||
unsigned long bi_memstart; /* start of DRAM memory */ |
||||
unsigned long bi_memsize; /* size of DRAM memory in bytes */ |
||||
unsigned long bi_flashstart; /* start of FLASH memory */ |
||||
unsigned long bi_flashsize; /* size of FLASH memory */ |
||||
unsigned long bi_flashoffset; /* reserved area for startup monitor */ |
||||
unsigned long bi_sramstart; /* start of SRAM memory */ |
||||
unsigned long bi_sramsize; /* size of SRAM memory */ |
||||
unsigned long bi_ip_addr; /* IP Address */ |
||||
unsigned char bi_enetaddr[6]; /* Ethernet adress */ |
||||
unsigned long bi_baudrate; /* Console Baudrate */ |
||||
} bd_t; |
||||
|
||||
|
||||
#endif /* _U_BOOT_H_ */ |
@ -0,0 +1,171 @@ |
||||
/*
|
||||
* (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 |
||||
*/ |
||||
|
||||
#ifndef __CONFIG_H |
||||
#define __CONFIG_H |
||||
|
||||
/*------------------------------------------------------------------------
|
||||
* BOARD/CPU -- TOP-LEVEL |
||||
*----------------------------------------------------------------------*/ |
||||
#define CONFIG_NIOS 1 /* NIOS-32 core */ |
||||
#define CONFIG_DK1C20 1 /* Cyclone DK-1C20 board*/ |
||||
#define CONFIG_SYS_CLK_FREQ 50000000 /* 50 MHz core clock */ |
||||
|
||||
/*------------------------------------------------------------------------
|
||||
* BASE ADDRESSES |
||||
*----------------------------------------------------------------------*/ |
||||
#define CFG_FLASH_BASE 0x00000000 /* Flash memory base */ |
||||
#define CFG_SRAM_BASE 0x00800000 /* External SRAM */ |
||||
#define CFG_SRAM_SIZE 0x00100000 /* 1 MByte */ |
||||
#define CFG_SDRAM_BASE 0x01000000 /* SDRAM base addr */ |
||||
#define CFG_SDRAM_SIZE 0x01000000 /* 16 MByte */ |
||||
#define CFG_VECT_BASE 0x008fff00 /* Vector table addr */ |
||||
|
||||
/*------------------------------------------------------------------------
|
||||
* MEMORY ORGANIZATION - For the most part, you can put things pretty |
||||
* much anywhere. This is pretty flexible for Nios. So here we make some |
||||
* arbitrary choices & assume that the monitor is placed at the end of |
||||
* a memory resource (so you must make sure TEXT_BASE is chosen |
||||
* appropriately). |
||||
* |
||||
* -The heap is placed below the monitor. |
||||
* -Global data is placed below the heap. |
||||
* -The stack is placed below global data (&grows down). |
||||
*----------------------------------------------------------------------*/ |
||||
#define CFG_MONITOR_LEN (256 * 1024) /* Reserve 256k */ |
||||
#define CFG_ENV_SIZE 0x10000 /* 64 KByte (1 sector) */ |
||||
#define CFG_GBL_DATA_SIZE 128 /* Global data size rsvd*/ |
||||
#define CFG_MALLOC_LEN (CFG_ENV_SIZE + 128*1024) |
||||
|
||||
#define CFG_MONITOR_BASE TEXT_BASE |
||||
#define CFG_MALLOC_BASE (CFG_MONITOR_BASE - CFG_MALLOC_LEN) |
||||
#define CFG_GBL_DATA_OFFSET (CFG_MALLOC_BASE -CFG_GBL_DATA_SIZE) |
||||
#define CFG_INIT_SP CFG_GBL_DATA_OFFSET |
||||
|
||||
/*------------------------------------------------------------------------
|
||||
* FLASH |
||||
*----------------------------------------------------------------------*/ |
||||
#define CFG_MAX_FLASH_SECT 128 /* Max # sects per bank */ |
||||
#define CFG_MAX_FLASH_BANKS 1 /* Max # of flash banks */ |
||||
#define CFG_FLASH_ERASE_TOUT 8000 /* Erase timeout (msec) */ |
||||
#define CFG_FLASH_WRITE_TOUT 100 /* Write timeout (msec) */ |
||||
|
||||
/*------------------------------------------------------------------------
|
||||
* ENVIRONMENT |
||||
*----------------------------------------------------------------------*/ |
||||
#define CFG_ENV_IS_IN_FLASH 1 /* Environment in flash */ |
||||
#define CFG_ENV_ADDR 0x00000000 /* Mem addr of env */ |
||||
#define CONFIG_ENV_OVERWRITE /* Serial/eth change Ok */ |
||||
|
||||
/*------------------------------------------------------------------------
|
||||
* CONSOLE |
||||
*----------------------------------------------------------------------*/ |
||||
#define CFG_NIOS_CONSOLE 0x00920900 /* Cons uart base addr */ |
||||
#define CFG_NIOS_FIXEDBAUD 1 /* Baudrate is fixed */ |
||||
#define CFG_BAUDRATE_TABLE { 9600, 19200, 38400, 57600, 115200 } |
||||
#define CONFIG_BAUDRATE 115200 |
||||
|
||||
/*------------------------------------------------------------------------
|
||||
* TIMER FOR TIMEBASE -- Nios doesn't have the equivalent of ppc PIT, |
||||
* so an avalon bus timer is required. |
||||
*----------------------------------------------------------------------*/ |
||||
#define CFG_NIOS_TMRBASE 0x009209e0 |
||||
#define CFG_NIOS_TMRIRQ 50 |
||||
#define CFG_NIOS_TMRMS 10 |
||||
|
||||
/*------------------------------------------------------------------------
|
||||
* Ethernet -- needs work! |
||||
*----------------------------------------------------------------------*/ |
||||
#if 0 |
||||
#define CONFIG_DRIVER_SMC91111 /* Using SMC91c111 */ |
||||
#define CONFIG_SMC91111_BASE 0x00910000 /* Base address */ |
||||
#undef CONFIG_SMC91111_EXT_PHY /* No external PHY */ |
||||
#define CONFIG_SMC_USE_32_BIT 1 /* 32-bit i/f */ |
||||
#endif |
||||
|
||||
#define CONFIG_ETHADDR 08:00:3e:26:0a:5b |
||||
#define CONFIG_NETMASK 255.255.255.0 |
||||
#define CONFIG_IPADDR 192.168.2.21 |
||||
#define CONFIG_SERVERIP 192.168.2.16 |
||||
|
||||
/*------------------------------------------------------------------------
|
||||
* COMMANDS |
||||
*----------------------------------------------------------------------*/ |
||||
#define CONFIG_COMMANDS (CFG_CMD_ALL & ~( \ |
||||
CFG_CMD_ASKENV | \
|
||||
CFG_CMD_BEDBUG | \
|
||||
CFG_CMD_BMP | \
|
||||
CFG_CMD_BSP | \
|
||||
CFG_CMD_CACHE | \
|
||||
CFG_CMD_DATE | \
|
||||
CFG_CMD_DOC | \
|
||||
CFG_CMD_DTT | \
|
||||
CFG_CMD_EEPROM | \
|
||||
CFG_CMD_ELF | \
|
||||
CFG_CMD_FAT | \
|
||||
CFG_CMD_FDC | \
|
||||
CFG_CMD_FDOS | \
|
||||
CFG_CMD_HWFLOW | \
|
||||
CFG_CMD_IDE | \
|
||||
CFG_CMD_I2C | \
|
||||
CFG_CMD_JFFS2 | \
|
||||
CFG_CMD_KGDB | \
|
||||
CFG_CMD_NAND | \
|
||||
CFG_CMD_NET | \
|
||||
CFG_CMD_MMC | \
|
||||
CFG_CMD_MII | \
|
||||
CFG_CMD_PCI | \
|
||||
CFG_CMD_PCMCIA | \
|
||||
CFG_CMD_SCSI | \
|
||||
CFG_CMD_SPI | \
|
||||
CFG_CMD_VFD | \
|
||||
CFG_CMD_USB ) ) |
||||
|
||||
|
||||
#include <cmd_confdefs.h> |
||||
|
||||
/*------------------------------------------------------------------------
|
||||
* KGDB |
||||
*----------------------------------------------------------------------*/ |
||||
#if (CONFIG_COMMANDS & CFG_CMD_KGDB) |
||||
#define CONFIG_KGDB_BAUDRATE 9600 |
||||
#endif |
||||
|
||||
/*------------------------------------------------------------------------
|
||||
* MISC |
||||
*----------------------------------------------------------------------*/ |
||||
#define CFG_LONGHELP /* undef to save memory */ |
||||
#define CFG_PROMPT "==> " /* Monitor Command Prompt */ |
||||
#define CFG_CBSIZE 256 /* Console I/O Buffer Size */ |
||||
#define CFG_PBSIZE (CFG_CBSIZE+sizeof(CFG_PROMPT)+16) /* Print Buffer Size */ |
||||
#define CFG_MAXARGS 16 /* max number of command args */ |
||||
#define CFG_BARGSIZE CFG_CBSIZE /* Boot Argument Buffer Size */ |
||||
#undef CFG_CLKS_IN_HZ |
||||
#define CFG_HZ 1562500 |
||||
#define CFG_LOAD_ADDR 0x00800000 /* Default load address */ |
||||
|
||||
#define CFG_MEMTEST_START 0x00000000 |
||||
#define CFG_MEMTEST_END 0x00000000 |
||||
|
||||
|
||||
#endif /* __CONFIG_H */ |
@ -0,0 +1,96 @@ |
||||
/*
|
||||
* (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 |
||||
*/ |
||||
|
||||
/*************************************************************************
|
||||
* Altera Nios Standard Peripherals |
||||
************************************************************************/ |
||||
|
||||
#ifndef __NIOSIO_H__ |
||||
#define __NIOSIO_H__ |
||||
|
||||
/*------------------------------------------------------------------------
|
||||
* UART |
||||
*----------------------------------------------------------------------*/ |
||||
typedef volatile struct nios_uart_t { |
||||
unsigned rxdata; /* Rx data reg */ |
||||
unsigned txdata; /* Tx data reg */ |
||||
unsigned status; /* Status reg */ |
||||
unsigned control; /* Control reg */ |
||||
unsigned divisor; /* Baud rate divisor reg */ |
||||
unsigned endofpacket; /* End-of-packet reg */ |
||||
}nios_uart_t; |
||||
|
||||
/* status register */ |
||||
#define NIOS_UART_PE (1 << 0) /* parity error */ |
||||
#define NIOS_UART_FE (1 << 1) /* frame error */ |
||||
#define NIOS_UART_BRK (1 << 2) /* break detect */ |
||||
#define NIOS_UART_ROE (1 << 3) /* rx overrun */ |
||||
#define NIOS_UART_TOE (1 << 4) /* tx overrun */ |
||||
#define NIOS_UART_TMT (1 << 5) /* tx empty */ |
||||
#define NIOS_UART_TRDY (1 << 6) /* tx ready */ |
||||
#define NIOS_UART_RRDY (1 << 7) /* rx ready */ |
||||
#define NIOS_UART_E (1 << 8) /* exception */ |
||||
#define NIOS_UART_DCTS (1 << 10) /* cts change */ |
||||
#define NIOS_UART_CTS (1 << 11) /* cts */ |
||||
#define NIOS_UART_EOP (1 << 12) /* eop detected */ |
||||
|
||||
/* control register */ |
||||
#define NIOS_UART_IPE (1 << 0) /* parity error int ena*/ |
||||
#define NIOS_UART_IFE (1 << 1) /* frame error int ena */ |
||||
#define NIOS_UART_IBRK (1 << 2) /* break detect int ena */ |
||||
#define NIOS_UART_IROE (1 << 3) /* rx overrun int ena */ |
||||
#define NIOS_UART_ITOE (1 << 4) /* tx overrun int ena */ |
||||
#define NIOS_UART_ITMT (1 << 5) /* tx empty int ena */ |
||||
#define NIOS_UART_ITRDY (1 << 6) /* tx ready int ena */ |
||||
#define NIOS_UART_IRRDY (1 << 7) /* rx ready int ena */ |
||||
#define NIOS_UART_IE (1 << 8) /* exception int ena */ |
||||
#define NIOS_UART_TBRK (1 << 9) /* transmit break */ |
||||
#define NIOS_UART_IDCTS (1 << 10) /* cts change int ena */ |
||||
#define NIOS_UART_RTS (1 << 11) /* rts */ |
||||
#define NIOS_UART_IEOP (1 << 12) /* eop detected int ena */ |
||||
|
||||
|
||||
/*------------------------------------------------------------------------
|
||||
* TIMER |
||||
*----------------------------------------------------------------------*/ |
||||
typedef volatile struct nios_timer_t { |
||||
unsigned status; /* Timer status reg */ |
||||
unsigned control; /* Timer control reg */ |
||||
unsigned periodl; /* Timeout period low */ |
||||
unsigned periodh; /* Timeout period high */ |
||||
unsigned snapl; /* Snapshot low */ |
||||
unsigned snaph; /* Snapshot high */ |
||||
}nios_timer_t; |
||||
|
||||
/* status register */ |
||||
#define NIOS_TIMER_TO (1 << 0) /* Timeout */ |
||||
#define NIOS_TIMER_RUN (1 << 1) /* Timer running */ |
||||
|
||||
/* control register */ |
||||
#define NIOS_TIMER_ITO (1 << 0) /* Timeout int ena */ |
||||
#define NIOS_TIMER_CONT (1 << 1) /* Continuous mode */ |
||||
#define NIOS_TIMER_START (1 << 2) /* Start timer */ |
||||
#define NIOS_TIMER_STOP (1 << 3) /* Stop timer */ |
||||
|
||||
#endif /* __NIOSIO_H__ */ |
||||
|
@ -0,0 +1,77 @@ |
||||
/*
|
||||
* (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 |
||||
*/ |
||||
|
||||
#ifndef __NIOS_H__ |
||||
#define __NIOS_H__ |
||||
|
||||
/*------------------------------------------------------------------------
|
||||
* Control registers -- use with wrctl() & rdctl() |
||||
*----------------------------------------------------------------------*/ |
||||
#define CTL_STATUS 0x00 /* Processor status */ |
||||
#define CTL_ISTATUS 0x01 /* Saved status (exception) */ |
||||
#define CTL_WVALID 0x02 /* Valid window limit */ |
||||
#define CTL_ICACHE 0x05 /* I-cache line-invalidate */ |
||||
#define CTL_CPU_ID 0x06 /* CPU version id */ |
||||
#define CTL_DCACHE 0x07 /* D-cache line-invalidate */ |
||||
#define CTL_CLR_IE 0x08 /* Interrupt clear (disable) */ |
||||
#define CTL_SET_IE 0x09 /* Interrupt set (enable) */ |
||||
|
||||
/*------------------------------------------------------------------------
|
||||
* Access to control regs |
||||
*----------------------------------------------------------------------*/ |
||||
#define _str_(s) #s |
||||
|
||||
#define rdctl(reg)\ |
||||
({unsigned int val;\
|
||||
asm volatile( "pfx " _str_(reg) "\n\t rdctl %0"\
|
||||
: "=r" (val) ); val;}) |
||||
|
||||
#define wrctl(reg,val)\ |
||||
asm volatile( "pfx " _str_(reg) "\n\t wrctl %0 \n\t nop"\
|
||||
: : "r" (val)) |
||||
|
||||
/*------------------------------------------------------------------------
|
||||
* Control reg bit masks |
||||
*----------------------------------------------------------------------*/ |
||||
#define STATUS_DC (1<<17) /* Data cache enable */ |
||||
#define STATUS_IC (1<<16) /* Instruction cache enable */ |
||||
#define STATUS_IE (1<<15) /* Interrupt enable */ |
||||
#define STATUS_IPRI (0x3f<<9) /* Interrupt priority */ |
||||
#define STATUS_CWP (0x1f<<4) /* Current window pointer */ |
||||
#define STATUS_N (1<<3) /* Condition code: negative */ |
||||
#define STATUS_V (1<<2) /* Condition code: overflow */ |
||||
#define STATUS_Z (1<<1) /* Condition code: zero */ |
||||
#define STATUS_C (1<<0) /* Condition code: carry/borrow */ |
||||
|
||||
static inline unsigned ipri( unsigned prio ) |
||||
{ |
||||
unsigned tmp; |
||||
unsigned status = rdctl(CTL_STATUS); |
||||
prio = (prio << 9) & STATUS_IPRI; |
||||
tmp = (status & ~STATUS_IPRI) | prio; |
||||
wrctl(CTL_STATUS,tmp); |
||||
return( (status & STATUS_IPRI) >> 9); |
||||
} |
||||
|
||||
|
||||
#endif /* __NIOS_H__ */ |
@ -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 |
||||
|
||||
#########################################################################
|
@ -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 (;;); |
||||
} |
@ -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; |
||||
} |
@ -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); |
||||
} |
@ -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; |
@ -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) */ |
@ -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) |
||||
{ |
||||
} |
@ -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); |
||||
} |
@ -0,0 +1,25 @@ |
||||
#
|
||||
# (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
|
||||
#
|
||||
|
||||
PLATFORM_CPPFLAGS += -m32 -DCONFIG_NIOS -ffixed-g7
|
Loading…
Reference in new issue