openpower/sv/implementation.mdwn

   1 # Implementation
   2
   3 This page covers and coordinates implementing SV.  The basic concept is
   4 to go step-by-step through the [[sv/overview]] adding each feature,
   5 one at a time.
   6
   7 Links:
   8
   9 * <http://lists.libre-soc.org/pipermail/libre-soc-dev/2021-January/001865.html>
  10 * <https://bugs.libre-soc.org/show_bug.cgi?id=578> python-based svp64
  11   assembler translator
  12 * <https://bugs.libre-soc.org/show_bug.cgi?id=579> c/c++ macro svp64
  13   assembler translator
  14 * <https://bugs.libre-soc.org/show_bug.cgi?id=577> gcc/binutils/svp64
  15 * <https://bugs.libre-soc.org/show_bug.cgi?id=241> gem5 / ISACaller simulator
  16
  17 # Code to convert
  18
  19 There are three projects:
  20
  21 * TestIssuer (the HDL)
  22 * ISACaller (the python-based simulator)
  23 * power-gem5 (a cycle accurate simulator)
  24
  25 Each of these needs to have SV augmentation, and the best way to
  26 do it is if they are all done at the same time, implementing the same
  27 incremental feature.
  28
  29 # Critical tasks
  30
  31 These are prerequisite tasks:
  32
  33 * power-gem5 automanagement, similar to pygdbmi for starting qemu
  34   - found this <https://www.gem5.org/documentation/general_docs/debugging_and_testing/debugging/debugging_simulated_code>
  35   just use pygdbmi
  36   - needs remote gdb first https://github.com/gem5/gem5/blob/stable/src/arch/riscv/remote_gdb.cc
  37 * c++, c and python macros for generating [[sv/svp64]] assembler
  38   (svp64 prefixes)
  39   - python svp64 underway, minimalist sufficient for FU unit tests
  40 <https://git.libre-soc.org/?p=soc.git;a=blob;f=src/soc/sv/trans/svp64.py;hb=HEAD>
  41
  42 People coordinating different tasks. This doesn't mean exclusive work on these areas it just means they are the "coordinator" and lead:
  43
  44 * Lauri:
  45 * Jacob: C/C++ header for using SV through inline assembly
  46 * Cesar: TestIssuer FSM
  47 * Alain: power-gem5
  48 * Cole:
  49 * Luke: ISACaller, python-assembler-generator-class
  50 * Tobias:
  51 * Alexandre: binutils-svp64-assembler
  52