TXP_H2A_1
sc->sc_txhir.r_reg = TXP_H2A_1;
WRITE_REG(sc, TXP_H2A_1, BUS_ADDR_LO32(sc->sc_boot_dma.dma_paddr));
WRITE_REG(sc, TXP_H2A_1, TXP_BOOTCMD_NULL);
WRITE_REG(sc, TXP_H2A_1, le32toh(fileheader->addr));
WRITE_REG(sc, TXP_H2A_1, le32toh(sect->nbytes));