Author: ian
Date: Wed Oct 16 19:06:44 2013
New Revision: 256647
URL: http://svnweb.freebsd.org/changeset/base/256647
Log:
Invalidate the entire L2 cache before enabling it. Say whether it
has been enabled or disabled.
Modified:
head/sys/arm/arm/pl310.c
Modified: head/sys/arm/arm/pl310.c
==============================================================================
--- head/sys/arm/arm/pl310.c Wed Oct 16 18:36:53 2013 (r256646)
+++ head/sys/arm/arm/pl310.c Wed Oct 16 19:06:44 2013 (r256647)
@@ -341,8 +341,13 @@ pl310_attach(device_t dev)
ctrl_value = pl310_read4(sc, PL310_CTRL);
if (sc->sc_enabled && !(ctrl_value & CTRL_ENABLED)) {
+ /* invalidate current content */
+ pl310_write4(pl310_softc, PL310_INV_WAY, 0xffff);
+ pl310_wait_background_op(PL310_INV_WAY, 0xffff);
+
/* Enable the L2 cache if disabled */
platform_pl310_write_ctrl(sc, CTRL_ENABLED);
+ device_printf(dev, "L2 Cache enabled\n");
}
if (!sc->sc_enabled && (ctrl_value & CTRL_ENABLED)) {
@@ -375,6 +380,7 @@ pl310_attach(device_t dev)
EVENT_COUNTER_CTRL_C0_RESET |
EVENT_COUNTER_CTRL_C1_RESET);
+ device_printf(dev, "L2 Cache disabled\n");
}
if (sc->sc_enabled)
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