On this chip, the ndmreset bit in the RISC-V debug module doesn't
trigger a system reset like it should. To work around this, add a custom
"reset-assert" handler in its config file that resets the system by
writing to memory-mapped registers.
I've tested this workaround on a Sipeed Longan Nano dev board with a
GD32VF103CBT6 chip. It works correctly for both "reset run" and "reset
halt" (halting at pc=0 for the latter).
I originally submitted[1] this workaround to the riscv-openocd fork of
OpenOCD. That fork's maintainers accepted it, but have not upstreamed it
like they have several other of my changes.
[1] https://github.com/riscv/riscv-openocd/pull/538
Change-Id: I7482990755b300fcbe4963c9a599d599bc02684d
Signed-off-by: Thomas Hebb <tommyhebb@gmail.com>
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: https://review.openocd.org/c/openocd/+/6957
Tested-by: jenkins
Reviewed-by: zapb <dev@zapb.de>
7ac389cf47