When Ibex does a load that receives data with bad integrity it
suppresses the write to the destination register. The implements
matching functionality for cosim.
This commit is mainly an extension to cosim environment to drive the newly
introduced state variable `nmi_int` in Spike.
This commit
- Extends RVFI interface by a single bit (ext_nmi_int)
- Configures cosim to set nmi_int inside Spike
Signed-off-by: Canberk Topal <ctopal@lowrisc.org>
The ic_scr_key_valid field indicates whether the ICache scrambling key
is valid.
CPUCTRL is also renamed CPUCTRLSTS as it contains both control and
status bits.
Extends RVFI connections further to include 30 mhpmcounterX registers.
Sets them up before every cosim step to let Spike know their real values.
Signed-off-by: Canberk Topal <ctopal@lowrisc.org>
