1 files changed, 65 insertions, 0 deletions
diff --git a/sys/arm/freescale/imx/imx6_pl310.c b/sys/arm/freescale/imx/imx6_pl310.c
new file mode 100644
index 000000000000..86fabf52e015
--- /dev/null
+++ b/sys/arm/freescale/imx/imx6_pl310.c
@@ -0,0 +1,65 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2012 Olivier Houchard.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+/*
+ * The machine-dependent part of the arm/pl310 driver for imx6 SoCs.
+ */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/rman.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+
+#include <machine/bus.h>
+#include <machine/pl310.h>
+#include <machine/platformvar.h>
+
+#include <arm/freescale/imx/imx6_machdep.h>
+
+#include "platform_pl310_if.h"
+
+void
+imx6_pl310_init(platform_t plat, struct pl310_softc *sc)
+{
+	uint32_t reg;
+
+	/*
+	 * Enable power saving modes:
+	 *  - Dynamic Gating stops the clock when the controller is idle.
+	 *  - Standby stops the clock when the cores are in WFI mode.
+	 */
+	reg = pl310_read4(sc, PL310_POWER_CTRL);
+	reg |= POWER_CTRL_ENABLE_GATING | POWER_CTRL_ENABLE_STANDBY;
+	pl310_write4(sc, PL310_POWER_CTRL, reg);
+
+	pl310_set_ram_latency(sc, PL310_TAG_RAM_CTRL,  4, 2, 3);
+	pl310_set_ram_latency(sc, PL310_DATA_RAM_CTRL, 4, 2, 3);
+}