VSID_HASH_MASK
hash = (vsid & VSID_HASH_MASK) ^ ((va & ADDR_PIDX) >> ADDR_PIDX_SHIFT);
hash = (vsid & VSID_HASH_MASK) ^ ((va & ADDR_PIDX) >> ADDR_PIDX_SHIFT);
hash = (vsid & VSID_HASH_MASK) ^ ((va & ADDR_PIDX) >> ADDR_PIDX_SHIFT);