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* Patch by Scott McNutt, 04 Oct 2003:

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

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

* Patch by Denis Peter, 25 Sept 2003:
  add support for the MIP405 Rev. C board
This commit is contained in:
wdenk 2003-10-08 23:26:14 +00:00
parent 54387ac931
commit 4a5517094d
52 changed files with 3419 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

18
CHANGELOG
View file

@ -2,6 +2,23 @@
Changes for U-Boot 1.0.0: Changes for U-Boot 1.0.0:
====================================================================== ======================================================================
* Patch by Scott McNutt, 04 Oct 2003:
- add support for Altera Nios-32 CPU
- add support for Nios Cyclone Development Kit (DK-1C20)
* Patch by Steven Scholz, 29 Sep 2003:
- A second parameter for bootm overwrites the load address for
"Standalone Application" images.
- bootm sets environment variable "filesize" to the resulting
(uncompressed) data length for "Standalone Application" images
when autostart is set to "no". Now you can do something like
if bootm $fpgadata $some_free_ram ; then
fpga load 0 $some_free_ram $filesize
fi
* Patch by Denis Peter, 25 Sept 2003:
add support for the MIP405 Rev. C board
* Patch by Yuli Barcohen, 25 Sep 2003: * Patch by Yuli Barcohen, 25 Sep 2003:
add support for Zephyr Engineering ZPC.1900 board add support for Zephyr Engineering ZPC.1900 board
@ -16,7 +33,6 @@ Changes for U-Boot 1.0.0:
enable timed autoboot on PXA enable timed autoboot on PXA
* Patch by David Müller, 22 Sep 2003: * Patch by David Müller, 22 Sep 2003:
- add $(CFLAGS) to "-print-libgcc-filename" so compiler driver - add $(CFLAGS) to "-print-libgcc-filename" so compiler driver
returns correct libgcc file path returns correct libgcc file path
- "latency" reduction of busy-loop waiting to improve "U-Boot" boot - "latency" reduction of busy-loop waiting to improve "U-Boot" boot

4
CREDITS
View file

@ -219,6 +219,10 @@ N: David M
E: d.mueller@elsoft.ch E: d.mueller@elsoft.ch
D: Support for Samsung ARM920T SMDK2410 eval board D: Support for Samsung ARM920T SMDK2410 eval board
N: Scott McNutt
E: smcnutt@psyent.com
D: Support for Altera Nios-32 CPU, for Nios Cyclone Development Kit (DK-1C20)
N: Rolf Offermanns N: Rolf Offermanns
E: rof@sysgo.de E: rof@sysgo.de
D: Initial support for SSV-DNP1110, SMC91111 driver D: Initial support for SSV-DNP1110, SMC91111 driver

15
MAINTAINERS
View file

@ -25,6 +25,10 @@ Pantelis Antoniou <panto@intracom.gr>
NETVIA MPC8xx NETVIA MPC8xx
Yuli Barcohen <yuli@arabellasw.com>
ZPC1900 MPC8265
Jerry Van Baren <gerald.vanbaren@smiths-aerospace.com> Jerry Van Baren <gerald.vanbaren@smiths-aerospace.com>
sacsng MPC8260 sacsng MPC8260
@ -333,6 +337,17 @@ Wolfgang Denk <wd@denx.de>
incaip MIPS32 4Kc incaip MIPS32 4Kc
purple MIPS64 5Kc purple MIPS64 5Kc
#########################################################################
# Nios-32 Systems: #
# #
# Maintainer Name, Email Address #
# Board CPU #
#########################################################################
Scott McNutt <smcnutt@psyent.com>
DK1C20 Nios-32
######################################################################### #########################################################################
# End of MAINTAINERS list # # End of MAINTAINERS list #
######################################################################### #########################################################################

14
Makefile
View file

@ -69,6 +69,9 @@ endif
ifeq ($(ARCH),mips) ifeq ($(ARCH),mips)
CROSS_COMPILE = mips_4KC- CROSS_COMPILE = mips_4KC-
endif endif
ifeq ($(ARCH),nios)
CROSS_COMPILE = nios-elf-
endif
endif endif
endif endif
@ -941,6 +944,17 @@ incaip_config: unconfig
purple_config : unconfig purple_config : unconfig
@./mkconfig $(@:_config=) mips mips purple @./mkconfig $(@:_config=) mips mips purple
#========================================================================
# Nios
#========================================================================
#########################################################################
## Nios32
#########################################################################
DK1C20_config: unconfig
@./mkconfig $(@:_config=) nios nios dk1c20
######################################################################### #########################################################################
######################################################################### #########################################################################

48
board/dk1c20/Makefile Normal file
View file

@ -0,0 +1,48 @@
#
# (C) Copyright 2001
# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
#
# See file CREDITS for list of people who contributed to this
# project.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of
# the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307 USA
#
include $(TOPDIR)/config.mk
LIB = lib$(BOARD).a
OBJS := $(BOARD).o flash.o
SOBJS = vectors.o
$(LIB): $(OBJS) $(SOBJS)
$(AR) crv $@ $^
clean:
rm -f $(SOBJS) $(OBJS)
distclean: clean
rm -f $(LIB) core *.bak .depend
#########################################################################
.depend: Makefile $(SOBJS:.o=.S) $(OBJS:.o=.c)
$(CC) -M $(CPPFLAGS) $(SOBJS:.o=.S) $(OBJS:.o=.c) > $@
-include .depend
#########################################################################

30
board/dk1c20/config.mk Normal file
View file

@ -0,0 +1,30 @@
#
# (C) Copyright 2003
# Psyent Corporation
# Scott McNutt <smcnutt@psyent.com>
#
# See file CREDITS for list of people who contributed to this
# project.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of
# the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307 USA
#
TEXT_BASE = 0x018c0000
ifeq ($(debug),1)
PLATFORM_CPPFLAGS += -DDEBUG
endif

45
board/dk1c20/dk1c20.c Normal file
View file

@ -0,0 +1,45 @@
/*
* (C) Copyright 2003, Psyent Corporation <www.psyent.com>
* Scott McNutt <smcnutt@psyent.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
void _default_hdlr (void)
{
printf ("default_hdlr\n");
}
int board_pre_init (void)
{
return 0;
}
int checkboard (void)
{
puts ("Board: Altera Nios 1C20 Development Kit\n");
return 0;
}
long int initdram (int board_type)
{
return (0);
}

226
board/dk1c20/flash.c Normal file
View file

@ -0,0 +1,226 @@
/*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <nios.h>
/*---------------------------------------------------------------------*/
#define BANKSZ (8 * 1024 * 1024)
#define SECTSZ (64 * 1024)
#define USERFLASH (2 * 1024 * 1024) /* bottom 2 MB for user */
flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
#define FLASH_WORD_SIZE unsigned char
/*---------------------------------------------------------------------*/
unsigned long flash_init (void)
{
int i;
unsigned long addr;
flash_info_t *fli = &flash_info[0];
fli->size = BANKSZ;
fli->sector_count = CFG_MAX_FLASH_SECT;
fli->flash_id = FLASH_MAN_AMD;
addr = CFG_FLASH_BASE;
for (i = 0; i < fli->sector_count; ++i) {
fli->start[i] = addr;
addr += SECTSZ;
/* Protect all but 2 MByte user area */
if (addr < (CFG_FLASH_BASE + USERFLASH))
fli->protect[i] = 0;
else
fli->protect[i] = 1;
}
return (BANKSZ);
}
/*--------------------------------------------------------------------*/
void flash_print_info (flash_info_t * info)
{
int i, k;
unsigned long size;
int erased;
volatile unsigned char *flash;
printf (" Size: %ld KB in %d Sectors\n",
info->size >> 10, info->sector_count);
printf (" Sector Start Addresses:");
for (i = 0; i < info->sector_count; ++i) {
/* Check if whole sector is erased */
if (i != (info->sector_count - 1))
size = info->start[i + 1] - info->start[i];
else
size = info->start[0] + info->size - info->start[i];
erased = 1;
flash = (volatile unsigned char *) info->start[i];
for (k = 0; k < size; k++) {
if (*flash++ != 0xff) {
erased = 0;
break;
}
}
/* Print the info */
if ((i % 5) == 0)
printf ("\n ");
printf (" %08lX%s%s", info->start[i], erased ? " E" : " ",
info->protect[i] ? "RO " : " ");
}
printf ("\n");
}
/*-------------------------------------------------------------------*/
int flash_erase (flash_info_t * info, int s_first, int s_last)
{
volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[0]);
volatile FLASH_WORD_SIZE *addr2;
int prot, sect;
int any = 0;
unsigned oldpri;
ulong start;
/* Some sanity checking */
if ((s_first < 0) || (s_first > s_last)) {
printf ("- no sectors to erase\n");
return 1;
}
prot = 0;
for (sect = s_first; sect <= s_last; ++sect) {
if (info->protect[sect]) {
prot++;
}
}
if (prot) {
printf ("- Warning: %d protected sectors will not be erased!\n",
prot);
} else {
printf ("\n");
}
/* NOTE: disabling interrupts on Nios can be very bad since it
* also disables the LO_LIMIT exception. It's better here to
* set the interrupt priority to 3 & restore it when we're done.
*/
oldpri = ipri (3);
/* It's ok to erase multiple sectors provided we don't delay more
* than 50 usec between cmds ... at which point the erase time-out
* occurs. So don't go and put printf() calls in the loop ... it
* won't be very helpful ;-)
*/
for (sect = s_first; sect <= s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
addr2 = (FLASH_WORD_SIZE *) (info->start[sect]);
*addr = 0xaa;
*addr = 0x55;
*addr = 0x80;
*addr = 0xaa;
*addr = 0x55;
*addr2 = 0x30;
any = 1;
}
}
/* Now just wait for 0xff & provide some user feedback while
* we wait.
*/
if (any) {
addr2 = (FLASH_WORD_SIZE *) (info->start[sect]);
start = get_timer (0);
while (*addr2 != 0xff) {
udelay (1000 * 1000);
putc ('.');
if (get_timer (start) > CFG_FLASH_ERASE_TOUT) {
printf ("timeout\n");
return 1;
}
}
printf ("\n");
}
/* Restore interrupt priority */
ipri (oldpri);
return 0;
}
/*-----------------------------------------------------------------------
* Copy memory to flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
{
vu_char *cmd = (vu_char *) info->start[0];
vu_char *dst = (vu_char *) addr;
unsigned char b;
unsigned oldpri;
ulong start;
while (cnt) {
/* Check for sufficient erase */
b = *src;
if ((*dst & b) != b) {
printf ("%02x : %02x\n", *dst, b);
return (2);
}
/* Disable interrupts other than window underflow
* (interrupt priority 2)
*/
oldpri = ipri (3);
*cmd = 0xaa;
*cmd = 0x55;
*cmd = 0xa0;
*dst = b;
/* Verify write */
start = get_timer (0);
while (*dst != b) {
if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
ipri (oldpri);
return 1;
}
}
dst++;
src++;
cnt--;
ipri (oldpri);
}
return (0);
}

70
board/dk1c20/u-boot.lds Normal file
View file

@ -0,0 +1,70 @@
/*
* (C) Copyright 2003, Psyent Corporation <www.psyent.com>
* Scott McNutt <smcnutt@psyent.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
OUTPUT_FORMAT("elf32-nios")
OUTPUT_ARCH(nios)
ENTRY(_start)
SECTIONS
{
.text :
{
cpu/nios/start.o (.text)
*(.text)
}
__text_end = .;
. = ALIGN(4);
.rodata :
{
*(.rodata)
}
__rodata_end = .;
. = ALIGN(4);
.data :
{
*(.data)
}
. = ALIGN(4);
__data_end = .;
__u_boot_cmd_start = .;
.u_boot_cmd :
{
*(.u_boot_cmd)
}
. = ALIGN(4);
__u_boot_cmd_end = .;
__bss_start = .;
. = ALIGN(4);
.bss :
{
*(.bss)
}
. = ALIGN(4);
__bss_end = .;
}

124
board/dk1c20/vectors.S Normal file
View file

@ -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 */

21
board/mpl/common/flash.c
View file

@ -155,7 +155,7 @@ void setup_cs_reloc(void)
unsigned long flash_init (void) unsigned long flash_init (void)
{ {
unsigned long size_b0, size_b1,flashcr; unsigned long size_b0, size_b1,flashcr, size_reg;
int mode, i; int mode, i;
extern char version_string; extern char version_string;
char *p=&version_string; char *p=&version_string;
@ -196,6 +196,21 @@ unsigned long flash_init (void)
size_b1 = 0 ; size_b1 = 0 ;
flash_info[0].size = size_b0; flash_info[0].size = size_b0;
/* set up flash cs according to the size */ /* set up flash cs according to the size */
size_reg=(flash_info[0].size >>20);
switch (size_reg) {
case 0:
case 1: i=0; break; /* <= 1MB */
case 2: i=1; break; /* = 2MB */
case 4: i=2; break; /* = 4MB */
case 8: i=3; break; /* = 8MB */
case 16: i=4; break; /* = 16MB */
case 32: i=5; break; /* = 32MB */
case 64: i=6; break; /* = 64MB */
case 128: i=7; break; /*= 128MB */
default:
printf("\n #### ERROR, wrong size %ld MByte reset board #####\n",size_reg);
while(1);
}
if(mode & BOOT_MPS) { if(mode & BOOT_MPS) {
/* flash is on CS1 */ /* flash is on CS1 */
mtdcr(ebccfga, pb1cr); mtdcr(ebccfga, pb1cr);
@ -203,7 +218,7 @@ unsigned long flash_init (void)
/* we map the flash high in every case */ /* we map the flash high in every case */
flashcr&=0x0001FFFF; /* mask out address bits */ flashcr&=0x0001FFFF; /* mask out address bits */
flashcr|= ((0-flash_info[0].size) & 0xFFF00000); /* start addr */ flashcr|= ((0-flash_info[0].size) & 0xFFF00000); /* start addr */
flashcr|= (((flash_info[0].size >>21) & 0x07) << 17); /* size addr */ flashcr|= (i << 17); /* size addr */
mtdcr(ebccfga, pb1cr); mtdcr(ebccfga, pb1cr);
mtdcr(ebccfgd, flashcr); mtdcr(ebccfgd, flashcr);
} }
@ -214,7 +229,7 @@ unsigned long flash_init (void)
/* we map the flash high in every case */ /* we map the flash high in every case */
flashcr&=0x0001FFFF; /* mask out address bits */ flashcr&=0x0001FFFF; /* mask out address bits */
flashcr|= ((0-flash_info[0].size) & 0xFFF00000); /* start addr */ flashcr|= ((0-flash_info[0].size) & 0xFFF00000); /* start addr */
flashcr|= (((flash_info[0].size >>21) & 0x07) << 17); /* size addr */ flashcr|= (i << 17); /* size addr */
mtdcr(ebccfga, pb0cr); mtdcr(ebccfga, pb0cr);
mtdcr(ebccfgd, flashcr); mtdcr(ebccfgd, flashcr);
} }

12
board/mpl/mip405/mip405.c
View file

@ -167,6 +167,15 @@ const sdram_t sdram_table[] = {
3, /* Address Mode = 3 */ 3, /* Address Mode = 3 */
5, /* size value */ 5, /* size value */
1}, /* ECC enabled */ 1}, /* ECC enabled */
{ 0x2f, /* Rev C, 128MByte -3 Board */
3, /* Case Latenty = 3 */
3, /* trp 20ns / 7.5 ns datain[27] */
3, /* trcd 20ns /7.5 ns (datain[29]) */
6, /* tras 44ns /7.5 ns (datain[30]) */
4, /* tcpt 44 - 20ns = 24ns */
3, /* Address Mode = 3 */
5, /* size value */
1}, /* ECC enabled */
{ 0xff, /* terminator */ { 0xff, /* terminator */
0xff, 0xff,
0xff, 0xff,
@ -550,7 +559,8 @@ void get_pcbrev_var(unsigned char *pcbrev, unsigned char *var)
tmp >>= 1; tmp >>= 1;
} }
rc++; rc++;
if((((bc>>4) & 0xf)==0x1) /* Rev B PCB with */ if(( (((bc>>4) & 0xf)==0x2) /* Rev C PCB or */
|| (((bc>>4) & 0xf)==0x1)) /* Rev B PCB with */
&& (rc==0x1)) /* Population Option 1 is a -3 */ && (rc==0x1)) /* Population Option 1 is a -3 */
rc=3; rc=3;
*pcbrev=(bc >> 4) & 0xf; *pcbrev=(bc >> 4) & 0xf;

27
common/cmd_bdinfo.c
View file

@ -95,6 +95,33 @@ int do_bdinfo ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
return 0; return 0;
} }
#elif defined(CONFIG_NIOS) /* NIOS*/
int do_bdinfo ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
DECLARE_GLOBAL_DATA_PTR;
int i;
bd_t *bd = gd->bd;
print_num ("memstart", (ulong)bd->bi_memstart);
print_num ("memsize", (ulong)bd->bi_memsize);
print_num ("flashstart", (ulong)bd->bi_flashstart);
print_num ("flashsize", (ulong)bd->bi_flashsize);
print_num ("flashoffset", (ulong)bd->bi_flashoffset);
printf ("ethaddr =");
for (i=0; i<6; ++i) {
printf ("%c%02X", i ? ':' : ' ', bd->bi_enetaddr[i]);
}
printf ("\nip_addr = ");
print_IPaddr (bd->bi_ip_addr);
printf ("\nbaudrate = %ld bps\n", bd->bi_baudrate);
return 0;
}
#else /* ! PPC, which leaves MIPS */ #else /* ! PPC, which leaves MIPS */
int do_bdinfo ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) int do_bdinfo ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])

7
common/cmd_boot.c
View file

@ -59,7 +59,14 @@ int do_go (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
*/ */
argv[0] = (char *)gd; argv[0] = (char *)gd;
#endif #endif
#if !defined(CONFIG_NIOS)
rc = ((ulong (*)(int, char *[]))addr) (--argc, &argv[1]); rc = ((ulong (*)(int, char *[]))addr) (--argc, &argv[1]);
#else
/*
* Nios function pointers are address >> 1
*/
rc = ((ulong (*)(int, char *[]))(addr>>1)) (--argc, &argv[1]);
#endif
if (rc != 0) rcode = 1; if (rc != 0) rcode = 1;
printf ("## Application terminated, rc = 0x%lX\n", rc); printf ("## Application terminated, rc = 0x%lX\n", rc);

12
common/cmd_bootm.c
View file

@ -235,6 +235,8 @@ int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
if (hdr->ih_arch != IH_CPU_I386) if (hdr->ih_arch != IH_CPU_I386)
#elif defined(__mips__) #elif defined(__mips__)
if (hdr->ih_arch != IH_CPU_MIPS) if (hdr->ih_arch != IH_CPU_MIPS)
#elif defined(__nios__)
if (hdr->ih_arch != IH_CPU_NIOS)
#else #else
# error Unknown CPU type # error Unknown CPU type
#endif #endif
@ -247,6 +249,10 @@ int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
switch (hdr->ih_type) { switch (hdr->ih_type) {
case IH_TYPE_STANDALONE: name = "Standalone Application"; case IH_TYPE_STANDALONE: name = "Standalone Application";
/* A second argument overwrites the load address */
if (argc > 2) {
hdr->ih_load = simple_strtoul(argv[2], NULL, 16);
}
break; break;
case IH_TYPE_KERNEL: name = "Kernel Image"; case IH_TYPE_KERNEL: name = "Kernel Image";
break; break;
@ -347,8 +353,12 @@ int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
/* load (and uncompress), but don't start if "autostart" /* load (and uncompress), but don't start if "autostart"
* is set to "no" * is set to "no"
*/ */
if (((s = getenv("autostart")) != NULL) && (strcmp(s,"no") == 0)) if (((s = getenv("autostart")) != NULL) && (strcmp(s,"no") == 0)) {
char buf[32];
sprintf(buf, "%lX", len);
setenv("filesize", buf);
return 0; return 0;
}
appl = (int (*)(cmd_tbl_t *, int, int, char *[]))ntohl(hdr->ih_ep); appl = (int (*)(cmd_tbl_t *, int, int, char *[]))ntohl(hdr->ih_ep);
(*appl)(cmdtp, flag, argc-1, &argv[1]); (*appl)(cmdtp, flag, argc-1, &argv[1]);
return 0; return 0;

44
cpu/nios/Makefile Normal file
View file

@ -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
#########################################################################

25
cpu/nios/config.mk Normal file
View file

@ -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 +=

78
cpu/nios/cpu.c Normal file
View file

@ -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 */

184
cpu/nios/interrupts.c Normal file
View file

@ -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 */

86
cpu/nios/serial.c Normal file
View file

@ -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 );
}

186
cpu/nios/start.S Normal file
View file

@ -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"

559
cpu/nios/traps.S Normal file
View file

@ -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 */

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@ -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

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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>

4
examples/Makefile
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@ -37,6 +37,10 @@ ifeq ($(ARCH),mips)
LOAD_ADDR = 0x80200000 -T mips.lds LOAD_ADDR = 0x80200000 -T mips.lds
endif endif
ifeq ($(ARCH),nios)
LOAD_ADDR = 0x01000000 -L $(gcclibdir)/m32 -T nios.lds
endif
include $(TOPDIR)/config.mk include $(TOPDIR)/config.mk
SREC = hello_world.srec SREC = hello_world.srec

61
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/*
* (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 = .;
}

17
examples/stubs.c
View file

@ -61,6 +61,23 @@ gd_t *global_data;
" lw $25, %1($25)\n" \ " lw $25, %1($25)\n" \
" jr $25\n" \ " jr $25\n" \
: : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "t9"); : : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "t9");
#elif defined(CONFIG_NIOS)
/*
* %g7 holds the pointer to the global_data. %g0 is call clobbered.
*/
#define EXPORT_FUNC(x) \
asm volatile ( \
" .globl " #x "\n" \
#x ":\n" \
" pfx %%hi(%0)\n" \
" movi %%g0, %%lo(%0)\n" \
" add %%g0, %%g7\n" \
" ld %%g0, [%%g0]\n" \
" pfx %1\n" \
" ld %%g0, [%%g0]\n" \
" jmp %%g0\n" \
" nop \n" \
: : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x) : "r0");
#else #else
#error stubs definition missing for this architecture #error stubs definition missing for this architecture
#endif #endif

37
include/asm-nios/bitops.h Normal file
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@ -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 */

31
include/asm-nios/byteorder.h Normal file
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@ -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

46
include/asm-nios/global_data.h Normal file
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@ -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 */

1
include/asm-nios/io.h Normal file
View file

@ -0,0 +1 @@
/*FIXME: Implement this! */

63
include/asm-nios/posix_types.h Normal file
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@ -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

1
include/asm-nios/processor.h Normal file
View file

@ -0,0 +1 @@
/* FIXME: Implement this! */

29
include/asm-nios/psr.h Normal file
View file

@ -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 */

36
include/asm-nios/ptrace.h Normal file
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@ -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 */

25
include/asm-nios/string.h Normal file
View file

@ -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

4
include/asm-nios/system.h Normal file
View file

@ -0,0 +1,4 @@
#ifndef _ASM_NIOS_SYSTEM_H_
#define _ASM_NIOS_SYSTEM_H_
#endif /* _ASM_NIOS_SYSTEM_H */

57
include/asm-nios/types.h Normal file
View file

@ -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 */

42
include/asm-nios/u-boot.h Normal file
View file

@ -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_ */

171
include/configs/DK1C20.h Normal file
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@ -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 */

1
include/image.h
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@ -65,6 +65,7 @@
#define IH_CPU_SPARC 10 /* Sparc */ #define IH_CPU_SPARC 10 /* Sparc */
#define IH_CPU_SPARC64 11 /* Sparc 64 Bit */ #define IH_CPU_SPARC64 11 /* Sparc 64 Bit */
#define IH_CPU_M68K 12 /* M68K */ #define IH_CPU_M68K 12 /* M68K */
#define IH_CPU_NIOS 13 /* Nios-32 */
/* /*
* Image Types * Image Types

96
include/nios-io.h Normal file
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@ -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__ */

77
include/nios.h Normal file
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@ -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__ */

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#
# (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
#########################################################################

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/*
* (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 (;;);
}

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/*
* (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;
}

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/*
* 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);
}

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#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;

56
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/*
* 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) */

34
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/*
* (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)
{
}

37
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/*
* (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);
}

25
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#
# (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