SRB_LBAL
(uint64_t)MVSATA_WDC_READ_1(mvport, SRB_LBAL) << 0;
(uint64_t)MVSATA_WDC_READ_1(mvport, SRB_LBAL) << 24;
sig0 |= MVSATA_WDC_READ_1(mvport, SRB_LBAL) << 8;
#define CRQB_ATACOMMAND_LBALOW CRQB_ATACOMMAND_REG(SRB_LBAL)