AcpiOsWritePort
AcpiOsWritePort(reg->reg_addr, val.u32,
(void)AcpiOsWritePort(addr, val, 8);
(void)AcpiOsWritePort(addr, val, 8);
rv = AcpiOsWritePort(addr, chunk,
AcpiOsWritePort(IO_RTC, 0x6c, 8);