AcpiOsReadPort
AcpiOsReadPort(reg->reg_addr, &val.u32,
AcpiOsReadPort(reg->reg_addr, &val.u32,
(void)AcpiOsReadPort(cs->cs_addr, &val, 8);
rv = AcpiOsReadPort(addr, &chunk32,
AcpiOsReadPort(IO_RTC + 1, &val, 8);