EIOINTC_IPMAP_START
case EIOINTC_IPMAP_START ... EIOINTC_IPMAP_END:
index = (offset - EIOINTC_IPMAP_START) >> 3;
case EIOINTC_IPMAP_START ... EIOINTC_IPMAP_END:
case EIOINTC_IPMAP_START ... EIOINTC_IPMAP_END:
offset = (addr - EIOINTC_IPMAP_START) / 4;