V3D_MMUC_CONTROL
V3D_WRITE(V3D_MMUC_CONTROL, V3D_MMUC_CONTROL_FLUSH |
ret = wait_for(!(V3D_READ(V3D_MMUC_CONTROL) &
V3D_WRITE(V3D_MMUC_CONTROL, V3D_MMUC_CONTROL_ENABLE);