1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2012 Olivier Houchard. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 #include <sys/types.h>
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/bus.h>
32 #include <sys/rman.h>
33 #include <sys/lock.h>
34 #include <sys/mutex.h>
35
36 #include <machine/bus.h>
37 #include <machine/pl310.h>
38 #include <machine/platformvar.h>
39
40 #include <arm/ti/ti_smc.h>
41 #include <arm/ti/omap4/omap4_machdep.h>
42 #include <arm/ti/omap4/omap4_smc.h>
43
44 #include "platform_pl310_if.h"
45
46 void
omap4_pl310_init(platform_t plat,struct pl310_softc * sc)47 omap4_pl310_init(platform_t plat, struct pl310_softc *sc)
48 {
49 uint32_t aux, prefetch;
50
51 aux = pl310_read4(sc, PL310_AUX_CTRL);
52 prefetch = pl310_read4(sc, PL310_PREFETCH_CTRL);
53
54 /*
55 * Disable instruction prefetch
56 */
57 prefetch &= ~PREFETCH_CTRL_INSTR_PREFETCH;
58 aux &= ~AUX_CTRL_INSTR_PREFETCH;
59
60 // prefetch &= ~PREFETCH_CTRL_DATA_PREFETCH;
61 // aux &= ~AUX_CTRL_DATA_PREFETCH;
62
63 /*
64 * Make sure data prefetch is on
65 */
66 prefetch |= PREFETCH_CTRL_DATA_PREFETCH;
67 aux |= AUX_CTRL_DATA_PREFETCH;
68
69 /*
70 * TODO: add tunable for prefetch offset
71 * and experiment with performance
72 */
73
74 ti_smc0(aux, 0, WRITE_AUXCTRL_REG);
75 ti_smc0(prefetch, 0, WRITE_PREFETCH_CTRL_REG);
76 }
77
78 void
omap4_pl310_write_ctrl(platform_t plat,struct pl310_softc * sc,uint32_t val)79 omap4_pl310_write_ctrl(platform_t plat, struct pl310_softc *sc, uint32_t val)
80 {
81
82 ti_smc0(val, 0, L2CACHE_WRITE_CTRL_REG);
83 }
84
85 void
omap4_pl310_write_debug(platform_t plat,struct pl310_softc * sc,uint32_t val)86 omap4_pl310_write_debug(platform_t plat, struct pl310_softc *sc, uint32_t val)
87 {
88
89 ti_smc0(val, 0, L2CACHE_WRITE_DEBUG_REG);
90 }
91