The HTW registers can be useful to debug a MC exception.
Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8400/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>