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<title>README - eCos OpenRISC Port</title>
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<body>
For those unfamiliar with OpenRISC, it is an open-source RISC/DSP processor
architecture. OpenCores.org makes available an <a
href="http://www.opencores.org/projects/or1k">implementation</a> of this
architecture that can be synthesized, for example, as part of an FPGA or ASIC.
The port of eCos to OpenRISC was sponsored by the <a
href="http://www.rosum.com">Rosum Corporation</a>.<br>
<br>
A few notes and caveats about the eCos OpenRISC port:
<ul>
<li>The only platform supported at this time is ORP (OpenRISC Reference
Platform).</li>
<li>The only ORP devices supported so far are serial ports used for
diagnostic and debugging purposes and AM29LVxxxx Flash ROM.</li>
<li>To build and debug, you must build the GNU development tools from
<a
href="#%20http://www.opencores.org/projects/or1k/GNU%20Toolchain%20Port">source
available at the OpenCores web site</a> -- not the versions available
from the GNU web site or elsewhere. There is a <a
href="./build_or32_elf_tools.sh">shell script</a> in this directory that
will assist in downloading and building the GNU toolchain.</li>
<li>For debugging, you can use either gdb's JTAG target or the serial
target. The latter has some advantages, e.g. the gdb serial target is
thread-aware, but it is much slower, especially while simulating.<br>
</li>
</ul>
Scott Furman<br>
<i>sfurman at rosum dot com</i><br>
<br>
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</html>
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