Documents new arch/arm directory
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@189 7fd9a85b-ad96-42d3-883c-3090e2eb8679
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* Verfied c5471 build under Cygwin on WinXP
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* Makesystem changes to better support different SoCs.
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* Made arch/c5471/include and arch/dm320/include identiry in
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* Made arch/c5471/include and arch/dm320/include identical in
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preparation for merging into arch/arm
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* Logic from arch/c5471 and arch/dm320 combined into arch/arm.
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arch/c5471 and arch/dm320 are deprecated and will be removed
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when the new c5471 and dm320 logic is verified.
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* Started m68322
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@ -16,7 +16,7 @@
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</b></big>
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<p><small>by</small></p>
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<p>Gregory Nutt</p>
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<p><small>Last Update: March 26, 2007</small></p>
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<p><small>Last Update: April 30, 2007</small></p>
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</center>
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<center><h1>Table of Contents</h1></center>
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@ -325,32 +325,75 @@
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</ul>
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<h3><a name="supportedarchitectures">2.2.3 Supported Architectures</a></h3>
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<p>
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<b>Archictecture- and Chip-Specific Directories</b>.
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All processor architecture-specific directories are maintained in sub-directories of
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the <code>arch/</code> directory.
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Different chips or SoC's may implement the same processor core.
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Chip-specific logic can be found in sub-directories under the architecture
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directory.
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Current architecture/chip directories are summarized below:
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</p>
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<ul>
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<li><code>arch/sim</code>:
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A user-mode port of NuttX to the x86 Linux platform is available.
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The purpose of this port is primarily to support OS feature developement.
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This port does not support interrupts or a real timer (and hence no
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round robin scheduler) Otherwise, it is complete.
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</li>
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<li><code>arch/c5471</code>:
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TI TMS320C5471 (also called TMS320DM180 or just C5471).
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NuttX operates on the ARM7 of this dual core processor.
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This port is complete, verified, and included in the NuttX release 0.1.1.
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<li><code>arch/arm</code>:
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This directory holds common ARM architectures. At present, this includes
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the following subdirectories:
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<ul>
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<li><code>arch/arm/include</code> and <code>arch/arm/common</code>:
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Common ARM logic.
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</li>
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<li><code>arch/arm/include/c5471</code> and <code>arch/arm/src/c5471</code>:
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TI TMS320C5471 (also called TMS320DM180 or just C5471).
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NuttX operates on the ARM7 of this dual core processor.
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This port is complete, verified, and included in the NuttX release 0.1.1.
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</li>
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<li><code>arch/arm/include/dm320</code> and <code>arch/arm/src/dm320</code>:
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TI TMS320DM320 (also called just DM320).
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NuttX operates on the ARM9EJS of this dual core processor.
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This port complete, verified, and included in the NuttX release 0.2.1.
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</li>
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</ul>
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</li>
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<li><code>configs/mcu123-lpc214x</code>:
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The mcu123.com lpc214x development board.
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This is a work in progress.
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<li><code>arch/dm320</code>:
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TI TMS320DM320 (also called just DM320).
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NuttX operates on the ARM9EJS of this dual core processor.
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This port complete, verified, and included in the NuttX release 0.2.1.
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</li>
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<li><code>arch/m68322</code>
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A work in progress.</li>
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</li>
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<li><code>arch/pjrc-8051</code>:
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8051 Microcontroller. This port is not quite ready for prime time.</li>
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</li>
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</ul>
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<p>
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<b>Deprecated Architecture Directories</b>.
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The following architecture directories are deprecated. They have been
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replaced by the logic in <code>arm/arm</code> and will deleted when
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<code>arch/arm</code> is fully verified.
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</p>
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<ul>
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<li><code>arch/c5471</code>:
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Replaced with <code>arch/arm/include/c5471</code> and
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<code>arch/arm/src/c5471<code>.
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</li>
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<li><code>arch/dm320</code>:
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Replaced with <code>arch/arm/include/dm320</code> and
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<code>arch/arm/src/dm320<code>.
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</li>
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</ul>
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<p>
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Other ports for the for the TI TMS320DM270 and for MIPS are in various states
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@ -1045,7 +1088,10 @@ The system can be re-made subsequently by just typing <code>make</code>.
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</p>
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<h2>Architecture selection</h2>
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<p>
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The following configuration itemes select the architecture, chip, and
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board configuration for the build.
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</p>
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<ul>
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<li><code>CONFIG_ARCH</code>:
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Identifies the arch subdirectory</li>
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@ -1062,6 +1108,18 @@ The system can be re-made subsequently by just typing <code>make</code>.
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For use in C code</li>
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</ul>
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<p>
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Some architectures require a description of the the RAM configuration:
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</p>
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<ul>
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<li><code>CONFIG_DRAM_SIZE</code>:
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Describes the installed DRAM.</li>
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<li><code>CONFIG_DRAM_START</code>:
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The start address of DRAM (physical)</li>
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<li><code>CONFIG_DRAM_VSTART</code>:
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The startaddress of DRAM (virtual)</li>
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</ul>
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<h2>General OS setup</h2>
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<ul>
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@ -129,15 +129,22 @@ arch/sim
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This port does not support interrupts or a real timer (and hence no
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round robin scheduler) Otherwise, it is complete.
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arch/c5471
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TI TMS320C5471 (also called TMS320DM180 or just C5471).
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NuttX operates on the ARM7 of this dual core processor. This port
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complete, verified, and included in the NuttX release 0.1.1.
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arch/arm
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This directory holds common ARM architectures. At present, this includes
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the following subdirectories:
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arch/dm320
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TI TMS320DM320 (also called just DM320).
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NuttX operates on the ARM9EJS of this dual core processor. This port
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complete, verified, and included in the NuttX release 0.2.1.
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arch/arm/include and arch/arm/common
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Common ARM logic.
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arch/arm/include/c5471 and arch/arm/src/c5471
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TI TMS320C5471 (also called TMS320DM180 or just C5471).
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NuttX operates on the ARM7 of this dual core processor. This port
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complete, verified, and included in the NuttX release 0.1.1.
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arch/arm/include/dm320 and arch/arm/src/dm320
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TI TMS320DM320 (also called just DM320).
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NuttX operates on the ARM9EJS of this dual core processor. This port
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complete, verified, and included in the NuttX release 0.2.1.
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arch/m68322
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A work in progress.
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@ -145,6 +152,16 @@ arch/m68322
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arch/pjrc-8051
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8051 Microcontroller. This port is not quite ready for prime time.
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The following architecture directories are deprecated. They have been
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replaced by the logic in arm/arm and will deleted when arch/arm is fully
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verified.
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arch/c5471
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Replaced with arch/arm/include/c5471 and arch/arm/src/c5471
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arch/dm320
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Replaced with arch/arm/include/dm320 and arch/arm/src/dm320
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Other ports for the for the TI TMS320DM270 and for MIPS are in various states
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of progress
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