SH4A_PCIEPHYADRR
if (pci_read_reg(chan, SH4A_PCIEPHYADRR) & (1 << BITS_ACK))
pci_write_reg(chan, phyaddr, SH4A_PCIEPHYADRR);
pci_write_reg(chan, 0, SH4A_PCIEPHYADRR);