CACHEFLUSH_D_PURGE
#define DCACHE CACHEFLUSH_D_PURGE /* writeback and flush data cache */
if ((op <= 0) || (op > (CACHEFLUSH_D_PURGE|CACHEFLUSH_I)))
switch (op & CACHEFLUSH_D_PURGE) {
case CACHEFLUSH_D_PURGE: