Author: andrew
Date: Sun Jan 6 00:42:09 2013
New Revision: 245083
URL: http://svnweb.freebsd.org/changeset/base/245083
Log:
Only work around errata when we are on a part where the erratum applies.
Reviewed by: gonzo
Modified:
head/sys/arm/arm/pl310.c
head/sys/arm/include/pl310.h
Modified: head/sys/arm/arm/pl310.c
==============================================================================
--- head/sys/arm/arm/pl310.c Sun Jan 6 00:38:25 2013 (r245082)
+++ head/sys/arm/arm/pl310.c Sun Jan 6 00:42:09 2013 (r245083)
@@ -135,11 +135,12 @@ pl310_cache_sync(void)
return;
#ifdef PL310_ERRATA_753970
- /* Write uncached PL310 register */
- pl310_write4(pl310_softc, 0x740, 0xffffffff);
-#else
- pl310_write4(pl310_softc, PL310_CACHE_SYNC, 0xffffffff);
+ if (sc->sc_rtl_release == CACHE_ID_RELEASE_r3p0)
+ /* Write uncached PL310 register */
+ pl310_write4(pl310_softc, 0x740, 0xffffffff);
+ else
#endif
+ pl310_write4(pl310_softc, PL310_CACHE_SYNC, 0xffffffff);
}
@@ -152,13 +153,17 @@ pl310_wbinv_all(void)
PL310_LOCK(pl310_softc);
#ifdef PL310_ERRATA_727915
- platform_pl310_write_debug(pl310_softc, 3);
+ if (sc->sc_rtl_release == CACHE_ID_RELEASE_r2p0 ||
+ sc->sc_rtl_release == CACHE_ID_RELEASE_r3p0)
+ platform_pl310_write_debug(pl310_softc, 3);
#endif
pl310_write4(pl310_softc, PL310_CLEAN_INV_WAY, g_l2cache_way_mask);
pl310_wait_background_op(PL310_CLEAN_INV_WAY, g_l2cache_way_mask);
pl310_cache_sync();
#ifdef PL310_ERRATA_727915
- platform_pl310_write_debug(pl310_softc, 0);
+ if (sc->sc_rtl_release == CACHE_ID_RELEASE_r2p0 ||
+ sc->sc_rtl_release == CACHE_ID_RELEASE_r3p0)
+ platform_pl310_write_debug(pl310_softc, 0);
#endif
PL310_UNLOCK(pl310_softc);
}
@@ -182,27 +187,32 @@ pl310_wbinv_range(vm_paddr_t start, vm_s
#ifdef PL310_ERRATA_727915
- platform_pl310_write_debug(pl310_softc, 3);
+ if (sc->sc_rtl_release == CACHE_ID_RELEASE_r2p0 ||
+ sc->sc_rtl_release == CACHE_ID_RELEASE_r3p0)
+ platform_pl310_write_debug(pl310_softc, 3);
#endif
while (size > 0) {
#ifdef PL310_ERRATA_588369
- /*
- * Errata 588369 says that clean + inv may keep the
- * cache line if it was clean, the recommanded workaround
- * is to clean then invalidate the cache line, with
- * write-back and cache linefill disabled
- */
-
- pl310_write4(pl310_softc, PL310_CLEAN_LINE_PA, start);
- pl310_write4(pl310_softc, PL310_INV_LINE_PA, start);
-#else
- pl310_write4(pl310_softc, PL310_CLEAN_INV_LINE_PA, start);
+ if (sc->sc_rtl_release <= CACHE_ID_RELEASE_r1p0) {
+ /*
+ * Errata 588369 says that clean + inv may keep the
+ * cache line if it was clean, the recommanded
+ * workaround is to clean then invalidate the cache
+ * line, with write-back and cache linefill disabled.
+ */
+ pl310_write4(pl310_softc, PL310_CLEAN_LINE_PA, start);
+ pl310_write4(pl310_softc, PL310_INV_LINE_PA, start);
+ } else
#endif
+ pl310_write4(pl310_softc, PL310_CLEAN_INV_LINE_PA,
+ start);
start += g_l2cache_line_size;
size -= g_l2cache_line_size;
}
#ifdef PL310_ERRATA_727915
- platform_pl310_write_debug(pl310_softc, 0);
+ if (sc->sc_rtl_release == CACHE_ID_RELEASE_r2p0 ||
+ sc->sc_rtl_release == CACHE_ID_RELEASE_r3p0)
+ platform_pl310_write_debug(pl310_softc, 0);
#endif
pl310_cache_sync();
@@ -307,6 +317,8 @@ pl310_attach(device_t dev)
pl310_filter, NULL, sc, &sc->sc_irq_h);
cache_id = pl310_read4(sc, PL310_CACHE_ID);
+ sc->sc_rtl_release = (cache_id >> CACHE_ID_RELEASE_SHIFT) &
+ CACHE_ID_RELEASE_MASK;
device_printf(dev, "Part number: 0x%x, release: 0x%x\n",
(cache_id >> CACHE_ID_PARTNUM_SHIFT) & CACHE_ID_PARTNUM_MASK,
(cache_id >> CACHE_ID_RELEASE_SHIFT) & CACHE_ID_RELEASE_MASK);
Modified: head/sys/arm/include/pl310.h
==============================================================================
--- head/sys/arm/include/pl310.h Sun Jan 6 00:38:25 2013
(r245082)
+++ head/sys/arm/include/pl310.h Sun Jan 6 00:42:09 2013
(r245083)
@@ -131,6 +131,7 @@ struct pl310_softc {
void* sc_irq_h;
int sc_enabled;
struct mtx sc_mtx;
+ u_int sc_rtl_revision;
};
/**
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