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xs1 disassembler, assembler, xc-1a/xc-1/xtag jtag tools

by segher

  • Status: Public release
  • Downloads: See External Download
  • Licence: GPL
  • Last updated: 25/Jun/2011 at 07:12 AM
  • Wiki entry: View project wiki entry

Version 1628

Size: Unknown

View older versions

Project Overview

http://git.infradead.org/users/segher/dis-xs1.git

Licensed under the GPL, version 2.

Current contents:

  • A full disassembler
  • An embryonic assembler
  • Command-line JTAG tools for XC-1A, XC-1, XTAG (or other 2232-based JTAG)

The assembler and disassembler are written in Forth; they are tested with gforth, but should work
with any ISO Forth. If not, please report.

XC-1 support has some shortcomings, to do with the hardware design.
XTAG support was tested with XC-2.

The JTAG tools are written in C. Current tools are:

  • reset -- do a hard reset, no debug mode (so it starts the rom code);
  • run -- upload a binary file from stdin to ram, and start it. This is a binary file, no checksum, no nothing;
  • dump -- write all ram contents to stdout;
  • dump-rom -- write rom contents to stdout;
  • regs -- print out all CPU registers on all threads;
  • term -- a terminal emulator;
  • pregs -- print out all pswitch regs;
  • sregs -- print out all sswitch regs;
  • psregs -- print out all processor status regs.
  • resources -- print out all resources.

You can use any core on any device in the JTAG chain on any debug adapter;
see --help for the options to use.

Images and diagrams

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Comments / Updates

In the "The XMOS XS1

Submitted by segher on Fri, 11/02/2011 - 23:36.

In the "The XMOS XS1 Architecture" book, which you can download
from the xmos.com documentation section.

Note that there are a few errors in there, some pretty big. Compare
with what xobjdump tells you.

It's likely a lot easier for you to output assembler code, and then run
the assembler on that -- that's what all other compilers do.

I'll be happy to answer any questions you have, but please keep it
on the forum, don't PM; that way, other people with the same questions
aren't left out, and things are more efficient.

I'm not interested in working on a BASIC or Pascal compiler, sorry.
I do like Pascal a lot -- XC has adopted some of its stronger points,
btw.

BASIC or PASCAL native compiler

Submitted by octal on Fri, 11/02/2011 - 22:29.

Hello,
just wanted to know where did you got all the info about instructions encoding?
I want to start writing a BASIC or PASCAL native compiler for XMOS devices (more interrested in a structured basic), are you interrested to contribute to such effort? (we can make it a commercial tool)

Thanks

Submitted by jonathan on Mon, 12/07/2010 - 14:15.

Segher, these look great. You might want to post this to the forum too so people notice it - you'll get some more responses.

I'll try to test these in the next few days.

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