SRB_LBAM
(uint64_t)MVSATA_WDC_READ_1(mvport, SRB_LBAM) << 8;
(uint64_t)MVSATA_WDC_READ_1(mvport, SRB_LBAM) << 32;
len = MVSATA_WDC_READ_1(mvport, SRB_LBAM) +
sig0 |= MVSATA_WDC_READ_1(mvport, SRB_LBAM) << 16;
#define CRQB_ATACOMMAND_LBAMID CRQB_ATACOMMAND_REG(SRB_LBAM)