dma64_regs
pdcs->txregs_64 = (struct dma64_regs *)
pdcs->rxregs_64 = (struct dma64_regs *)
struct dma64_regs dmaxmt; /* dma tx */
struct dma64_regs dmarcv; /* dma rx */
struct dma64_regs *txregs_64; /* dma tx engine registers */
struct dma64_regs *rxregs_64; /* dma rx engine registers */