com_cfcr
sp->ioaddr + com_cfcr, 1, &data);
sp->ioaddr + com_cfcr, 1, &lcr);
EFI_ISA_ACPI_MEMORY_WIDTH_8_BIT, sp->ioaddr + com_cfcr, 1, &cfcr);
EFI_ISA_ACPI_MEMORY_WIDTH_8_BIT, sp->ioaddr + com_cfcr, 1, &c);
EFI_ISA_ACPI_MEMORY_WIDTH_8_BIT, sp->ioaddr + com_cfcr, 1, &cfcr);
outb(sp->ioaddr + com_cfcr, CFCR_DLAB | sp->lcr);
outb(sp->ioaddr + com_cfcr, sp->lcr);
cfcr = inb(ioaddr + com_cfcr);
outb(ioaddr + com_cfcr, CFCR_DLAB | cfcr);
outb(ioaddr + com_cfcr, cfcr);