MPIC_MSGR_REGISTERS_PER_BLOCK
return mpic_msgr_number_of_blocks() * MPIC_MSGR_REGISTERS_PER_BLOCK;
for (i = 0, irq_index = 0; i < MPIC_MSGR_REGISTERS_PER_BLOCK; ++i) {
reg_number = block_number * MPIC_MSGR_REGISTERS_PER_BLOCK + i;