ATA_SACTIVE
ch->r_io[ATA_SACTIVE].res = ctlr->r_res2;
ch->r_io[ATA_SACTIVE].offset = ATA_AHCI_P_SACT + offset;
ATA_IDX_OUTL(ch, ATA_SACTIVE, ATA_IDX_INL(ch, ATA_SACTIVE) & (1 << tag));
ch->r_io[ATA_SACTIVE].res = ctlr->r_res1;
ch->r_io[ATA_SACTIVE].offset = 0x02350 + ATA_MV_EDMA_BASE(ch);
ch->r_io[ATA_SACTIVE].res = ctlr->r_res2;
ch->r_io[ATA_SACTIVE].offset = 0x1f0c + offset;