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[FreeBSD/releng/10.2.git] / sys / arm / ti / omap4 / omap4_l2cache.c
1 /*-
2  * Copyright (c) 2012 Olivier Houchard.  All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  * 1. Redistributions of source code must retain the above copyright
8  *    notice, this list of conditions and the following disclaimer.
9  * 2. Redistributions in binary form must reproduce the above copyright
10  *    notice, this list of conditions and the following disclaimer in the
11  *    documentation and/or other materials provided with the distribution.
12  *
13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23  */
24
25 #include <sys/cdefs.h>
26 __FBSDID("$FreeBSD$");
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 <arm/ti/ti_smc.h>
36 #include <arm/ti/omap4/omap4_smc.h>
37 #include <machine/bus.h>
38 #include <machine/pl310.h>
39
40 void
41 platform_pl310_init(struct pl310_softc *sc)
42 {
43         uint32_t aux, prefetch;
44
45         aux = pl310_read4(sc, PL310_AUX_CTRL);
46         prefetch = pl310_read4(sc, PL310_PREFETCH_CTRL);
47
48         /*
49          * Disable instruction prefetch
50          */
51         prefetch &= ~PREFETCH_CTRL_INSTR_PREFETCH;
52         aux &= ~AUX_CTRL_INSTR_PREFETCH;
53
54         // prefetch &= ~PREFETCH_CTRL_DATA_PREFETCH;
55         // aux &= ~AUX_CTRL_DATA_PREFETCH;
56
57         /*
58          * Make sure data prefetch is on
59          */
60         prefetch |= PREFETCH_CTRL_DATA_PREFETCH;
61         aux |= AUX_CTRL_DATA_PREFETCH;
62
63         /*
64          * TODO: add tunable for prefetch offset
65          * and experiment with performance
66          */
67
68         ti_smc0(aux, 0, WRITE_AUXCTRL_REG);
69         ti_smc0(prefetch, 0, WRITE_PREFETCH_CTRL_REG);
70 }
71
72 void
73 platform_pl310_write_ctrl(struct pl310_softc *sc, uint32_t val)
74 {
75         ti_smc0(val, 0, L2CACHE_WRITE_CTRL_REG);
76 }
77
78 void
79 platform_pl310_write_debug(struct pl310_softc *sc, uint32_t val)
80 {
81         ti_smc0(val, 0, L2CACHE_WRITE_DEBUG_REG);
82 }