Initial commit of OpenSPARC T2 architecture model.

[OpenSPARC-T2-SAM] / rst / rstf / README

Overview of the RSTF workspace:  rstf = RST Format
Russell Quong  11/2002

For a more upto date copy of this information see:
	/import/archperf/ws/rstf/rstFormat.tex
or
	http://ppgweb.eng/archperf/rstFormat.html
or 
	http://ppgweb.eng/~quong/rstFormat.html

A) Purpose:
  1) The main purpose of this WS is to define the RST file format in rstf.h.
   Some secondary and/or deprecated definitions are in   rstf_*.h

  2) A secondary purpose is to define common RST utilities/code, including
   starter code and RST-to-RST filters.

B) Guidance on updating this workspace
  1) The file rstf.h defines RSTF.  Many other programs use this file.  So...
    - Try to avoid changing this file if possible.
      In the last 12 months (10/2001-10/2002), I bumped the version once.
    - Avoid breaking backward compatibility AT ALL COSTS
      There is considerable data in rstf 2.04-2.06 format.
    - The safest changes involve adding new rtypes or adding more constants
      to existing enumerations.  E.g. filling out the register constants
      in the REGVAL_T:regtype[]
    - There is a Java port of RSTF, in the jrst workspace.  A Perl script
      "parses" rstf.h and makes undocumented assumptions about
      the way rstf.h looks.  Please try to conform to the existing style
      in the typedefs and enums.
    - I (RQ) have tried to be stingy in using rtype values.
  2) If you must change rstf.h, bump the version number in rstf.h

C) Version numbers (VN):  Many "programs" have VN.  Here is some guidance.
   - rstf
       version of the RST Format.  Should not change often.
       The first record in an RSTF trace must define the version number
       If a new version of rstf breaks backward compatibility, increment
       the major version.
   - rstFilter
       updated when a filter is added or updated.    Update freely.
   rstracer  = (in rstracer WS)
      Reflects which version of the rst tracer.  The version indicates
        what bugs/idiosyncrasies exist.
      Rstracer outputs both its own version number and the RSTF version num

D) Basic programs and scripts.

rstFilter.C
  Implemements many RST to RST filters (read stdin/file , write stdout).
  Typically you need to use several filters in a row.
  All error messages go to stderr.
  This code offers generic double-buffering on both input and the output,
  making is "easier" (hah) to do transformations that must
  look at several records.

  E.g.
    rstFilter -a filter-spec1 input-file | rstFilter -a filter-spec2 > output

  For fixing up the post [Atrace->RST] files, I run the two filters:
     ihash = add ihash values to the RST records
     addBrTarg = fill in branch target addresses.

runRSTFilt.sh:
  convenient shell script driver for running rstFilter.  Use this.
  E.g to fix up the post [Atrace->RST] files, 
	runRSTFilt.sh -a 'ihash addBrTarg' [-u] raw.rst

  This generates the file out.final which is the final processed RST file ready for snapping.
  
atrace2rst.C:
  convert Atrace to raw RST

test-atr2rst.sh:
 test the conversion from Atrace to refined RST and shows how to do this.
 We currently run atrace2rst and then add BR targets.

mksnaps.sh:
  sample script to create Round 1 snaps (VA only) for Aztecs from long RST files

~quong/bin/rq-snap_global.sh:
  snap the RST file

  -o . -p $snapdir -n $nsnaps -s $snaplen,$actualRSTsize,4 out.final > snap.log 2>&1

  put the output in .
  put the snaps in a subdirectory $snapdir of .

data-atrace:
  some sample traces I use for testing
  the link BMCSRC points to the source for the sort files.