Preface
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The Real Time Executive for Multiprocessor Systems (RTEMS) is designed to be portable across multiple processor architectures.  However, the nature of real-time systems makes it essential that the application designer understand certain processor dependent implementation details.  These processor dependencies include calling convention, board support package issues, interrupt processing, exact RTEMS memory requirements, performance data, header files, and the assembly language interface to the executive.

This document discusses the ARM architecture dependencies in this port of RTEMS.  The ARM family has a wide variety of implementations by a wide range of vendors.  Consequently, there are 100's of CPU models within it.

It is highly recommended that the ARM RTEMS application developer obtain and become familiar with the documentation for the processor being used as well as the documentation for the ARM architecture as a whole.

Architecture Documents
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For information on the ARM architecture, refer to the following documents available from Arm, Limited (http//www.arm.com/).  There does not appear to be an electronic version of a manual on the architecture in general on that site.  The following book is a good resource:

  * David Seal. "ARM Architecture Reference Manual." Addison-Wesley. ISBN 0-201-73719-1. 2001.