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Documentation/NuttxPortingGuide.html
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@ -16,7 +16,7 @@
</b></big>
<p><small>by</small></p>
<p>Gregory Nutt</p>
<p><small>Last Update: March 26, 2007</small></p>
<p><small>Last Update: April 30, 2007</small></p>
</center>
<center><h1>Table of Contents</h1></center>
@ -325,32 +325,75 @@
</ul>
<h3><a name="supportedarchitectures">2.2.3 Supported Architectures</a></h3>
<p>
<b>Archictecture- and Chip-Specific Directories</b>.
All processor architecture-specific directories are maintained in sub-directories of
the <code>arch/</code> directory.
Different chips or SoC's may implement the same processor core.
Chip-specific logic can be found in sub-directories under the architecture
directory.
Current architecture/chip directories are summarized below:
</p>
<ul>
<li><code>arch/sim</code>:
A user-mode port of NuttX to the x86 Linux platform is available.
The purpose of this port is primarily to support OS feature developement.
This port does not support interrupts or a real timer (and hence no
round robin scheduler) Otherwise, it is complete.
</li>
<li><code>arch/c5471</code>:
TI TMS320C5471 (also called TMS320DM180 or just C5471).
NuttX operates on the ARM7 of this dual core processor.
This port is complete, verified, and included in the NuttX release 0.1.1.
<li><code>arch/arm</code>:
This directory holds common ARM architectures. At present, this includes
the following subdirectories:
<ul>
<li><code>arch/arm/include</code> and <code>arch/arm/common</code>:
Common ARM logic.
</li>
<li><code>arch/arm/include/c5471</code> and <code>arch/arm/src/c5471</code>:
TI TMS320C5471 (also called TMS320DM180 or just C5471).
NuttX operates on the ARM7 of this dual core processor.
This port is complete, verified, and included in the NuttX release 0.1.1.
</li>
<li><code>arch/arm/include/dm320</code> and <code>arch/arm/src/dm320</code>:
TI TMS320DM320 (also called just DM320).
NuttX operates on the ARM9EJS of this dual core processor.
This port complete, verified, and included in the NuttX release 0.2.1.
</li>
</ul>
</li>
<li><code>configs/mcu123-lpc214x</code>:
The mcu123.com lpc214x development board.
This is a work in progress.
<li><code>arch/dm320</code>:
TI TMS320DM320 (also called just DM320).
NuttX operates on the ARM9EJS of this dual core processor.
This port complete, verified, and included in the NuttX release 0.2.1.
</li>
<li><code>arch/m68322</code>
A work in progress.</li>
</li>
<li><code>arch/pjrc-8051</code>:
8051 Microcontroller. This port is not quite ready for prime time.</li>
</li>
</ul>
<p>
<b>Deprecated Architecture Directories</b>.
The following architecture directories are deprecated. They have been
replaced by the logic in <code>arm/arm</code> and will deleted when
<code>arch/arm</code> is fully verified.
</p>
<ul>
<li><code>arch/c5471</code>:
Replaced with <code>arch/arm/include/c5471</code> and
<code>arch/arm/src/c5471<code>.
</li>
<li><code>arch/dm320</code>:
Replaced with <code>arch/arm/include/dm320</code> and
<code>arch/arm/src/dm320<code>.
</li>
</ul>
<p>
Other ports for the for the TI TMS320DM270 and for MIPS are in various states
@ -1045,7 +1088,10 @@ The system can be re-made subsequently by just typing <code>make</code>.
</p>
<h2>Architecture selection</h2>
<p>
The following configuration itemes select the architecture, chip, and
board configuration for the build.
</p>
<ul>
<li><code>CONFIG_ARCH</code>:
Identifies the arch subdirectory</li>
@ -1062,6 +1108,18 @@ The system can be re-made subsequently by just typing <code>make</code>.
For use in C code</li>
</ul>
<p>
Some architectures require a description of the the RAM configuration:
</p>
<ul>
<li><code>CONFIG_DRAM_SIZE</code>:
Describes the installed DRAM.</li>
<li><code>CONFIG_DRAM_START</code>:
The start address of DRAM (physical)</li>
<li><code>CONFIG_DRAM_VSTART</code>:
The startaddress of DRAM (virtual)</li>
</ul>
<h2>General OS setup</h2>
<ul>