btlb_insert
if (btlb_insert(HPPA_SID_KERNEL, spa, spa, &len,
if (btlb_insert(HPPA_SID_KERNEL, va, va, &size,
int btlb_insert(pa_space_t space, vaddr_t va, paddr_t pa, vsize_t *lenp, u_int prot);