RTEMS | Draft: bsps/riscv: add Smrnmi extension support (!1391)

[Gedare Bloom (@gedare)]

Gedare Bloom commented on a discussion on bsps/riscv/riscv/irq/rnmi.c: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1391#note_158446

 > + */
 > +
 > +#include <bsp/fatal.h>
 > +#include <bsp/irq-generic.h>
 > +#include <bsp/riscv-rnmi.h>
 > +#include <bsp/rnmi.h>
 > +
 > +#include <inttypes.h>
 > +#include <rtems/bspIo.h>
 > +#include <rtems/score/cpu.h>
 > +#include <rtems/score/percpu.h>
 > +#include <rtems/score/riscv-utility.h>
 > +#include <rtems/score/smpimpl.h>
 > +
 > +/* Per-core deferred RNMI contexts */
 > +static RISCV_RNMI_Context _RISCV_RNMI_context[CPU_MAXIMUM_PROCESSORS];

My preference is to have ABI support available in cpukit, to the widest possible support of all BSPs. I think there is too much copy-paste-modify going on in the RISC-V BSPs already, we will end up with a lot of different solutions for the same problems.

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1391#note_158446
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