Commit Graph

2 Commits (caravel-mpw5-20220322)

Author SHA1 Message Date
Anton Blanchard d504ae63f6 Update JTAG TAP controller for Microwatt
Make a few changes to match what mw_debug expects:

- 6 byte instructions
- IDCODE at 001001
- microwatt debug at 000011

Also change IDCODE to be an IBM ID.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
3 years ago
Anton Blanchard 15bb4aa90a First pass at an external JTAG port
The verilator simulation interface uses the remote_bitbang
protocol from openocd. I have a simple implementation for
urjtag too.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
3 years ago