RE: [ECOS] Problem running redboot from eb40a

[Timothy Woods <twoods at actelesys dot com>]

Wilson,

I had the same problem on my EB40A.  I just got it working yesterday.  Angel
is actually loaded into the upper end of SRAM on the board, so the download
overwrites this location.  What I had to do was change the mlt files in the
include/pkgconf directory.  The mlt_arm_at91_eb40a_ram.h and .ldi file
specifically.
I made the following changes to the .h file:
CYGMEM_REGION_sram_SIZE from 0x20000 to 0x2000
CYGMEM_REGION_ram from 0x20000 to 0x2000
CYGMEM_REGION_ram_SIZE from 0x1e000 to 0x3e000

And to the .ldi file:
sram LENGTH from 0x20000 to 0x2000
ram ORIGIN from 0x20000 to 0x2000
ram LENGTH from 0x1e000 to 0x3e000

Change the SECTION_rom_vectors (ram, 0x20000, ...
to be SECTION_rom_vectors (ram, 0x2000, ...

You should then be able to build RedBoot.
Once you have the redboot.elf file, just run "arm-elf-gdb redboot.elf"
At the gdb prompt (assuming ttyS0 is the serial port you're using):
(gdb) target rdi /dev/ttyS0
(gdb) set $cpsr=0xd3
(gdb) load
(gdb) cont
Then hit ^Z and bring up minicom or whatever terminal program you have, set
up the port speed, etc correctly, and you should have a RedBoot> prompt.

There may be a better way to do this.  I haven't been tinkering with eCos
for very long.  This at least got me started.

Getting a ROM version was another struggle.  Let me know if you want help
with that.  There are some tricks due to the way the flash driver is set up.
Just be very careful not to write over the lower section of the flash unless
that's something you really want to do.

Good luck!
-Tim


-----Original Message-----
From: wkhto at engmail dot uwaterloo dot ca [mailto:wkhto at engmail dot uwaterloo dot ca] 
Sent: Thursday, March 20, 2003 11:53 AM
To: ecos-discuss at sources dot redhat dot com
Subject: [ECOS] Problem running redboot from eb40a

Hi

I got a problem when I try to run redboot from eb40a. I used ecos 2.0 b1
with
Shannon Hollands two tar.gz files to compile the eb40a redboot(RAM). The
compilation is good. When I try to load the elf file by using GDB, GDB stops
during the load process.

Here is the output:

--------------------------------------------------
arm-elf-gdb redboot.elf
GNU gdb 5.3
Copyright 2002 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "--host=i686-pc-linux-gnu --target=arm-elf"...
(gdb) tar rdi s=/dev/ttyS0
Angel Debug Monitor (serial) 1.04 (Advanced RISC Machines SDT 2.5) for
AT91EB40A
(1.00)
Angel Debug Monitor rebuilt on Feb 03 2002 at 16:09:59
Serial Rate:   9600
Connected to ARM RDI target.
(gdb) load
Loading section .rom_vectors, size 0x40 lma 0x20000
Loading section .text, size 0xb47c lma 0x20040
--------------------------------------------------

Any suggestions for this problem

Thanks for your help

Wilson


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