VRTOVA
p = (char *)VRTOVA(vreg); /* reg..reg+sz rather than 0..sz */
p = (char *)VRTOVA(vreg); /* reg..reg+sz rather than 0..sz */
setregmap(VRTOVA(me->me_vreg), reginval);
va = VRTOVA(gap_end);
tlb_flush_region(VRTOVA(vr), pm->pm_ctxnum,