RTEMS | Implement MicroBlaze TM27 via AXI timer (!980)

[Sam Price (@TheSamPrice)]

Sam Price started a new discussion on bsps/microblaze/microblaze_fpga/irq/irq.c: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/980#note_140686

 >  }
 >  
 >  rtems_status_code bsp_interrupt_raise( rtems_vector_number vector )
 >  {
 > -  (void) vector;
 > +  if ( vector == microblaze_tm27_alt_vector() ) {
 > +    uint32_t mer;
 > +
 > +    /*
 > +     * Generate a software interrupt by writing ISR while HIE is clear
 > +     * (Xilinx AXI INTC PG099).
 > +     */
 > +    mer = mblaze_intc->mer;
 > +    mblaze_intc->mer = mer & ~MICROBLAZE_INTC_MER_HIE;
 > +    mblaze_intc->isr = 1U << vector;
 > +    mblaze_intc->mer = mer;

Need to verify and add a comment from the xilinx guide.

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/980#note_140686
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