1 /*-
2 * Copyright (c) 2012 Olivier Houchard.
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 __FBSDID("$FreeBSD: releng/11.0/sys/arm/freescale/imx/imx6_pl310.c 265447 2014-05-06 14:26:24Z ian $");
28
29 /*
30 * The machine-dependent part of the arm/pl310 driver for imx6 SoCs.
31 */
32
33 #include <sys/types.h>
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/bus.h>
37 #include <sys/rman.h>
38 #include <sys/lock.h>
39 #include <sys/mutex.h>
40
41 #include <machine/bus.h>
42 #include <machine/pl310.h>
43
44 void
45 platform_pl310_init(struct pl310_softc *sc)
46 {
47 uint32_t reg;
48
49 /*
50 * Enable power saving modes:
51 * - Dynamic Gating stops the clock when the controller is idle.
52 * - Standby stops the clock when the cores are in WFI mode.
53 */
54 reg = pl310_read4(sc, PL310_POWER_CTRL);
55 reg |= POWER_CTRL_ENABLE_GATING | POWER_CTRL_ENABLE_STANDBY;
56 pl310_write4(sc, PL310_POWER_CTRL, reg);
57
58 pl310_set_ram_latency(sc, PL310_TAG_RAM_CTRL, 4, 2, 3);
59 pl310_set_ram_latency(sc, PL310_DATA_RAM_CTRL, 4, 2, 3);
60 }
61
62 void
63 platform_pl310_write_ctrl(struct pl310_softc *sc, uint32_t val)
64 {
65
66 pl310_write4(sc, PL310_CTRL, val);
67 }
68
69 void
70 platform_pl310_write_debug(struct pl310_softc *sc, uint32_t val)
71 {
72
73 pl310_write4(sc, PL310_DEBUG_CTRL, val);
74 }
75
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