TXP_H2A_2
WRITE_REG(sc, TXP_H2A_2, sc->sc_boot_dma.dma_paddr >> 32);
WRITE_REG(sc, TXP_H2A_2, TXP_BOOTCMD_NULL);
WRITE_REG(sc, TXP_H2A_2, sc->sc_cmdring.lastwrite);
WRITE_REG(sc, TXP_H2A_2, letoh32(fileheader->hmac[0]));
WRITE_REG(sc, TXP_H2A_2, letoh16(sect->cksum));