MREG
pcn_bcr_write(l, PCN_BCR33, MREG(reg) | MPHY(phy));
pcn_bcr_write(l, PCN_BCR33, MREG(reg) | MPHY(phy));
data = (2U << 26) | MPHY(phy) | MREG(reg);
data = (1U << 26) | MPHY(phy) | MREG(reg) | (val & 0xffff);