bc_inv
void (*bc_inv)(unsigned long page, unsigned long size);
bcops->bc_inv(page, size);
bc_inv(CKSEG0ADDR_OR_64BIT(cps_vec_pa), BEV_VEC_SIZE);
bc_inv(addr, size);
.bc_inv = (void *)cache_noop
.bc_inv = indy_sc_wback_invalidate
.bc_inv = mips_sc_inv,
.bc_inv = r5k_dma_cache_inv_sc
.bc_inv = rm7k_sc_inv