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[FreeBSD/FreeBSD.git] / sys / arm / ti / omap4 / omap4_l2cache.c
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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 __FBSDID("$FreeBSD$");
29 #include <sys/types.h>
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/bus.h>
33 #include <sys/rman.h>
34 #include <sys/lock.h>
35 #include <sys/mutex.h>
36
37 #include <machine/bus.h>
38 #include <machine/pl310.h>
39 #include <machine/platformvar.h>
40
41 #include <arm/ti/ti_smc.h>
42 #include <arm/ti/omap4/omap4_machdep.h>
43 #include <arm/ti/omap4/omap4_smc.h>
44
45 #include "platform_pl310_if.h"
46
47 void
48 omap4_pl310_init(platform_t plat, struct pl310_softc *sc)
49 {
50         uint32_t aux, prefetch;
51
52         aux = pl310_read4(sc, PL310_AUX_CTRL);
53         prefetch = pl310_read4(sc, PL310_PREFETCH_CTRL);
54
55         /*
56          * Disable instruction prefetch
57          */
58         prefetch &= ~PREFETCH_CTRL_INSTR_PREFETCH;
59         aux &= ~AUX_CTRL_INSTR_PREFETCH;
60
61         // prefetch &= ~PREFETCH_CTRL_DATA_PREFETCH;
62         // aux &= ~AUX_CTRL_DATA_PREFETCH;
63
64         /*
65          * Make sure data prefetch is on
66          */
67         prefetch |= PREFETCH_CTRL_DATA_PREFETCH;
68         aux |= AUX_CTRL_DATA_PREFETCH;
69
70         /*
71          * TODO: add tunable for prefetch offset
72          * and experiment with performance
73          */
74
75         ti_smc0(aux, 0, WRITE_AUXCTRL_REG);
76         ti_smc0(prefetch, 0, WRITE_PREFETCH_CTRL_REG);
77 }
78
79 void
80 omap4_pl310_write_ctrl(platform_t plat, struct pl310_softc *sc, uint32_t val)
81 {
82
83         ti_smc0(val, 0, L2CACHE_WRITE_CTRL_REG);
84 }
85
86 void
87 omap4_pl310_write_debug(platform_t plat, struct pl310_softc *sc, uint32_t val)
88 {
89
90         ti_smc0(val, 0, L2CACHE_WRITE_DEBUG_REG);
91 }