Function pl310_cache_sync

freebsd/arm/arm/pl310.c:233–251

* pl310_cache_sync - performs a cache sync operation * * According to the TRM: * * "Before writing to any other register you must perform an explicit * Cache Sync operation. This is particularly important when the cache is * enabled and changes to how the cache allocates new lines are to be made." * * */

 *
 */
static __inline void
pl310_cache_sync(void)
{

	if ((pl310_softc == NULL) || !pl310_softc->sc_enabled)
		return;

	/* Do not sync outer cache on IO coherent platform */
	if (pl310_softc->sc_io_coherent)
		return;

#ifdef PL310_ERRATA_753970
	if (pl310_softc->sc_rtl_revision == CACHE_ID_RELEASE_r3p0)
		/* Write uncached PL310 register */
		pl310_write4(pl310_softc, 0x740, 0xffffffff);
	else
#endif
		pl310_write4(pl310_softc, PL310_CACHE_SYNC, 0xffffffff);
}

static void
pl310_wbinv_all(void)