static bool ahci_map_fis_address(AHCIDevice *ad)
{
    AHCIPortRegs *pr = &ad->port_regs;
    map_page(ad->hba->as, &ad->res_fis,
             ((uint64_t)pr->fis_addr_hi << 32) | pr->fis_addr, 256);
    return ad->res_fis != NULL;
}

Unknown