RTEMS | riscv: s-mode use SBI for timer, reset, and SMP support (!1108)

[Matteo Concas (@matteo.concas)]

Matteo Concas commented on a discussion on bsps/riscv/riscv/start/bspsmp.c: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1108#note_145133

 >  {
 >    Per_CPU_Control *cpu;
 >  
 > -  cpu = _Per_CPU_Get_by_index(target_processor_index);
 >  #ifdef RISCV_USE_S_MODE
 > -  /* TODO: Add IPI call. */
 > +  uint32_t hartid;
 > +  unsigned long hart_mask;
 >    (void) cpu;
 > +
 > +  hartid = _RISCV_Map_cpu_index_to_hartid(target_processor_index);
 > +  hart_mask = 1UL << hartid;
 > +  sbi_send_ipi(&hart_mask);
 >  #else
 > +  cpu = _Per_CPU_Get_by_index(target_processor_index);

Generally I prefer having all declarations at the start of a function (or at the start of the scope) but it can add clutter when you start using define blocks..

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1108#note_145133
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