sidsc-design specialization (reusing components)

New structure: 
sidsc-design

This is a proposed 
structure for the initial public release of the SIDSC 
plugin.

 

Problem 
statement

The SIDSC data model 
does not provide good support for reusing components. There are several 
usecases that the proposed sidsc-design map addresses:

 

1. Supply a base 
address for each component on a design. Currently, it is hard-coded and can be 
filtered via select-atts.

 

2. Provide a 
collection of components.

 

3. Define RTL 
parameters.

 

Inspiration: 
IP-XACT

IP-XACT has a 
<design> element that satisfies the usecases above. Here is how the 
specification describes the design element:

 

"An IP-XACT design 
is the central placeholder for the assembly of component objects meta-data. A 
design describes a list of components referenced by this description, their 
configuration, and their interconnections to each other. The interconnections 
may be between interfaces or between ports on a component. A 
design description is analogous to a schematic of 
components."

 

This is exactly what 
we need.

 

Desired 
response

Please have a look 
at this proposal and be ready for discussion at the next sidsc call. I know I'm 
throwing a bunch of last minute items at you, but these are real issues that 
I've encountered using the schema in a production environment. I think it will 
benefit all members/users... and, the work is already done and 
documented.

 

Sample 
RTL (from 
wikipedia.com)

 

module Div20x (rst, 
clk, cet, cep, count,tc);
// TITLE 'Divide-by-20 Counter with enables'
// 
enable CEP is a clock enable only
// enable CET is a clock enable and
// 
enables the TC output
// a counter using the Verilog 
language

 

parameter size = 5;
parameter length = 
20;

 

input rst; // These 
inputs/outputs represent 

Sample 
IP-XACT design element

 

<design>
  
<vendor>spiritconsortium.org</vendor>
  
<library>Leon2RTL</library>
  
<name>design_Leon2Platform</name>
  
<version>3.0</version>
  
<componentInstances>
    
<componentInstance>
      
<instanceName>uahbbus</instanceName>
      
<componentRef vendor="spiritconsortium.org" library="Leon2RTL" 
name="ahbbus22" version="1.3"/>
      
<configurableElementValues>
        
<configurableElementValue 
referenceId="defmast">0</configurableElementValue>
        
<configurableElementValue 
referenceId="range_slv0_mirror">0x00040000</configurableElementValue>
        
<configurableElementValue 
referenceId="range_slv1_mirror">0x00009000</configurableElementValue>
      
</configurableElementValues>
    
</componentInstance>
  
</componentInstances>

 

 

Sample SIDSC 
design

 

<sidsc-design>
    <component-ref 
base-address="0" 
href="TPM.xml">
        <parameter>
            
<key>size</key>
            
<value>5</value>
        
</parameter>
        
<parameter>
            
<key>length</key>
            
<value>20</value>
        
</parameter>
    
</component-ref>
    <component-ref base-address="1" 
href="SCI.xml">
    
</component-ref>
</sidsc-design>