1 /*-
2 * Copyright (c) 2017 Stormshield.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 *
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
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include <sys/cdefs.h>
27 /*
28 * The machine-dependent part of the arm/pl310 driver for Armada 38x SoCs.
29 */
30
31 #include <sys/types.h>
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/bus.h>
35 #include <sys/rman.h>
36 #include <sys/lock.h>
37 #include <sys/mutex.h>
38
39 #include <machine/bus.h>
40 #include <machine/pl310.h>
41 #include <machine/platform.h>
42 #include <machine/platformvar.h>
43
44 #include "armada38x_pl310.h"
45 #include "platform_pl310_if.h"
46
47 void
mv_a38x_platform_pl310_init(platform_t plat,struct pl310_softc * sc)48 mv_a38x_platform_pl310_init(platform_t plat, struct pl310_softc *sc)
49 {
50 uint32_t reg;
51
52 /*
53 * Enable power saving modes:
54 * - Dynamic Gating stops the clock when the controller is idle.
55 */
56 reg = pl310_read4(sc, PL310_POWER_CTRL);
57 reg |= POWER_CTRL_ENABLE_GATING;
58 pl310_write4(sc, PL310_POWER_CTRL, reg);
59
60 pl310_write4(sc, PL310_PREFETCH_CTRL, PREFETCH_CTRL_DL |
61 PREFETCH_CTRL_DATA_PREFETCH | PREFETCH_CTRL_INCR_DL |
62 PREFETCH_CTRL_DL_ON_WRAP);
63
64 /* Disable L2 cache sync for IO coherent operation */
65 sc->sc_io_coherent = true;
66 }
67
68 void
mv_a38x_platform_pl310_write_ctrl(platform_t plat,struct pl310_softc * sc,uint32_t val)69 mv_a38x_platform_pl310_write_ctrl(platform_t plat, struct pl310_softc *sc, uint32_t val)
70 {
71
72 pl310_write4(sc, PL310_CTRL, val);
73 }
74
75 void
mv_a38x_platform_pl310_write_debug(platform_t plat,struct pl310_softc * sc,uint32_t val)76 mv_a38x_platform_pl310_write_debug(platform_t plat, struct pl310_softc *sc, uint32_t val)
77 {
78
79 pl310_write4(sc, PL310_DEBUG_CTRL, val);
80 }
81