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/types.h>
28 #include <sys/param.h>
29 #include <sys/systm.h>
30 #include <sys/bus.h>
31 #include <sys/rman.h>
32 #include <sys/lock.h>
33 #include <sys/mutex.h>
34
35 #include <machine/bus.h>
36 #include <machine/pl310.h>
37 #include <machine/platformvar.h>
38
39 #include <arm/ti/ti_smc.h>
40 #include <arm/ti/omap4/omap4_machdep.h>
41 #include <arm/ti/omap4/omap4_smc.h>
42
43 #include "platform_pl310_if.h"
44
45 void
omap4_pl310_init(platform_t plat,struct pl310_softc * sc)46 omap4_pl310_init(platform_t plat, struct pl310_softc *sc)
47 {
48 uint32_t aux, prefetch;
49
50 aux = pl310_read4(sc, PL310_AUX_CTRL);
51 prefetch = pl310_read4(sc, PL310_PREFETCH_CTRL);
52
53 /*
54 * Disable instruction prefetch
55 */
56 prefetch &= ~PREFETCH_CTRL_INSTR_PREFETCH;
57 aux &= ~AUX_CTRL_INSTR_PREFETCH;
58
59 // prefetch &= ~PREFETCH_CTRL_DATA_PREFETCH;
60 // aux &= ~AUX_CTRL_DATA_PREFETCH;
61
62 /*
63 * Make sure data prefetch is on
64 */
65 prefetch |= PREFETCH_CTRL_DATA_PREFETCH;
66 aux |= AUX_CTRL_DATA_PREFETCH;
67
68 /*
69 * TODO: add tunable for prefetch offset
70 * and experiment with performance
71 */
72
73 ti_smc0(aux, 0, WRITE_AUXCTRL_REG);
74 ti_smc0(prefetch, 0, WRITE_PREFETCH_CTRL_REG);
75 }
76
77 void
omap4_pl310_write_ctrl(platform_t plat,struct pl310_softc * sc,uint32_t val)78 omap4_pl310_write_ctrl(platform_t plat, struct pl310_softc *sc, uint32_t val)
79 {
80
81 ti_smc0(val, 0, L2CACHE_WRITE_CTRL_REG);
82 }
83
84 void
omap4_pl310_write_debug(platform_t plat,struct pl310_softc * sc,uint32_t val)85 omap4_pl310_write_debug(platform_t plat, struct pl310_softc *sc, uint32_t val)
86 {
87
88 ti_smc0(val, 0, L2CACHE_WRITE_DEBUG_REG);
89 }
90