design document template proposal (#226)

merging. See the issue and discussion:
Issue #224 
discussion: #225

docs/design_document_template/README.md

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+# Design document template for Olympia development
+
+This provides a starting point or template for design document development.
+
+This is adoc format which has use else where in RVI documentation.
+
+There is a convention for images, using the ./media directory
+
+There are a number of free editors available for adoc: clion, VS code, etc.
+
+## Contents
+
+olympiaDesignDocUnitTemplate.adoc
+./media/image1.png

docs/design_document_template/olympiaDesignDocUnitTemplate.adoc

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+:doctitle: Olympia Design Document Template
+
+:toc:
+
+[[Document_Information]]
+== Document Information
+
+<meta data>
+
+[[Revision_History]]
+=== Revision History
+
+<newest revision at the top of this table>
+
+[width="100%",cols="11%,11%,16%,62%",options="header",]
+|===
+|*Revision* |*Date*      |*Author*  |*Summary of Changes*
+|0.?        | 2024.11.12 | <author> | <next change>
+|0.1        | 2024.11.12 | Jeff Nye | initial template
+|===
+
+[[Conventions_and_Terminology]]
+=== Conventions and Terminology
+
+<terms or acronyms used in the document that may not have general visibility>
+
+[width="100%",cols="17%,83%",options="header",]
+|===
+|Label |Description
+|<label> |<description
+| |
+|===
+
+[[Related_Documents]]
+=== Related Documents
+
+<external documents relevant to the unit>
+[width="100%",cols="25%,75%",options="header",]
+|===
+|*Title* |*Description*
+| The RISC-V Instruction Set Manual Volume I | https://drive.google.com/file/d/1uviu1nH-tScFfgrovvFCrj7Omv8tFtkp/view?usp=drive_link[Unprivileged Architecture Version 2024041]
+| | |
+| | |
+|===
+
+
+[[Notes_Open_Issues]]
+=== Notes/Open Issues
+
+<advisories, limitations, unsolved problems>
+
+* Note1
+* Note 2
+
+[[OVERVIEW]]
+== OVERVIEW
+
+<Overview of the unit, what does it do, where does it fit into Olympia
+proper, use the section below to discuss the context>
+
+[[Overview_Block_Diagram]]
+=== Overview Block Diagram
+
+<Add an overview block diagram>
+
+[[Functional_Description]]
+== Functional Description
+
+<this begins the detailed description of the unit. Typically, this
+discusses each major block in a separate sub-section>
+
+[[Unit_Block_Diagram]]
+=== Unit Block Diagram
+
+<Add an overview block diagram>
+
+image:media/image1.png[image,width=576,height=366]
+
+Figure 1 - Sample Figure
+
+
+[[Block_Diagram_Description]]
+=== Block Diagram Description
+
+<walk through the block diagram>
+
+[[Description_of_Block_B1]]
+== Description of Block <B1>
+
+<this section contains block level details>
+
+[[Operation]]
+=== Operation
+
+<describe the low-level operation of the block>
+
+[[Interfaces]]
+=== Interfaces
+
+<this is typically a general list of block interfaces, this changes with
+development, final design will finalize this section>
+
+[width="100%",cols="18%,21%,61%",options="header",]
+|===
+|*Name* |*C++ Type* |*Purpose/Description*
+| | |
+| | |
+| | |
+|===
+
+[[CPP_Class_Description]]
+=== C++ Class Description
+
+<describe the class, it’s inheritance assumptions and data structures
+used by the class
+
+[[Parameterization]]
+=== Parameterization
+
+<top level parameterization, include hidden and those visible in arch
+yaml>
+
+[[Test_Bench_Description]]
+== Test Bench Description
+
+<description of what is covered by the test bench, description of each
+test as appropriate
+
+[[Description_of_Test_1]]
+=== Description of Test 1
+
+<discuss test 1>
+
+[[Description_of_Test_2]]
+=== Description of Test 2
+
+<discuss test 2>
+
+[[Future_Work_or_Features]]
+== Future Work or Features
+
+<forward looking statements>
+
+[[References_Citations]]
+== References/Citations
+
+<Add references as needed>
+
+[1] <insert citation>
+
+[[Appendices]]
+== Appendices
+
+<as needed>
+
+[[Appendix_1]]
+=== Appendix 1
+
+<as needed>