2 * Copyright (c) 2017 Stormshield.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
30 * The machine-dependent part of the arm/pl310 driver for Armada 38x SoCs.
33 #include <sys/types.h>
34 #include <sys/param.h>
35 #include <sys/systm.h>
39 #include <sys/mutex.h>
41 #include <machine/bus.h>
42 #include <machine/pl310.h>
45 platform_pl310_init(struct pl310_softc *sc)
50 * Enable power saving modes:
51 * - Dynamic Gating stops the clock when the controller is idle.
53 reg = pl310_read4(sc, PL310_POWER_CTRL);
54 reg |= POWER_CTRL_ENABLE_GATING;
55 pl310_write4(sc, PL310_POWER_CTRL, reg);
57 pl310_write4(sc, PL310_PREFETCH_CTRL, PREFETCH_CTRL_DL |
58 PREFETCH_CTRL_DATA_PREFETCH | PREFETCH_CTRL_INCR_DL |
59 PREFETCH_CTRL_DL_ON_WRAP);
61 /* Disable L2 cache sync for IO coherent operation */
62 sc->sc_io_coherent = true;
66 platform_pl310_write_ctrl(struct pl310_softc *sc, uint32_t val)
69 pl310_write4(sc, PL310_CTRL, val);
73 platform_pl310_write_debug(struct pl310_softc *sc, uint32_t val)
76 pl310_write4(sc, PL310_DEBUG_CTRL, val);