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Documentation/NuttxPortingGuide.html
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@ -16,7 +16,7 @@
</b></big> </b></big>
<p><small>by</small></p> <p><small>by</small></p>
<p>Gregory Nutt</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>
<center><h1>Table of Contents</h1></center> <center><h1>Table of Contents</h1></center>
@ -325,32 +325,75 @@
</ul> </ul>
<h3><a name="supportedarchitectures">2.2.3 Supported Architectures</a></h3> <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> <ul>
<li><code>arch/sim</code>: <li><code>arch/sim</code>:
A user-mode port of NuttX to the x86 Linux platform is available. 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. 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 This port does not support interrupts or a real timer (and hence no
round robin scheduler) Otherwise, it is complete. round robin scheduler) Otherwise, it is complete.
</li>
<li><code>arch/c5471</code>: <li><code>arch/arm</code>:
TI TMS320C5471 (also called TMS320DM180 or just C5471). This directory holds common ARM architectures. At present, this includes
NuttX operates on the ARM7 of this dual core processor. the following subdirectories:
This port is complete, verified, and included in the NuttX release 0.1.1. <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>: <li><code>configs/mcu123-lpc214x</code>:
The mcu123.com lpc214x development board. The mcu123.com lpc214x development board.
This is a work in progress. This is a work in progress.
</li>
<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><code>arch/m68322</code> <li><code>arch/m68322</code>
A work in progress.</li> A work in progress.</li>
</li>
<li><code>arch/pjrc-8051</code>: <li><code>arch/pjrc-8051</code>:
8051 Microcontroller. This port is not quite ready for prime time.</li> 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> </ul>
<p> <p>
Other ports for the for the TI TMS320DM270 and for MIPS are in various states 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> </p>
<h2>Architecture selection</h2> <h2>Architecture selection</h2>
<p>
The following configuration itemes select the architecture, chip, and
board configuration for the build.
</p>
<ul> <ul>
<li><code>CONFIG_ARCH</code>: <li><code>CONFIG_ARCH</code>:
Identifies the arch subdirectory</li> 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> For use in C code</li>
</ul> </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> <h2>General OS setup</h2>
<ul> <ul>