2 * Copyright (c) 2012 Olivier Houchard. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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.
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.
25 #include <sys/cdefs.h>
26 __FBSDID("$FreeBSD$");
27 #include <sys/types.h>
28 #include <sys/param.h>
29 #include <sys/systm.h>
33 #include <sys/mutex.h>
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>
41 platform_pl310_init(struct pl310_softc *sc)
43 uint32_t aux, prefetch;
45 aux = pl310_read4(sc, PL310_AUX_CTRL);
46 prefetch = pl310_read4(sc, PL310_PREFETCH_CTRL);
49 * Disable instruction prefetch
51 prefetch &= ~PREFETCH_CTRL_INSTR_PREFETCH;
52 aux &= ~AUX_CTRL_INSTR_PREFETCH;
54 // prefetch &= ~PREFETCH_CTRL_DATA_PREFETCH;
55 // aux &= ~AUX_CTRL_DATA_PREFETCH;
58 * Make sure data prefetch is on
60 prefetch |= PREFETCH_CTRL_DATA_PREFETCH;
61 aux |= AUX_CTRL_DATA_PREFETCH;
64 * TODO: add tunable for prefetch offset
65 * and experiment with performance
68 ti_smc0(aux, 0, WRITE_AUXCTRL_REG);
69 ti_smc0(prefetch, 0, WRITE_PREFETCH_CTRL_REG);
73 platform_pl310_write_ctrl(struct pl310_softc *sc, uint32_t val)
75 ti_smc0(val, 0, L2CACHE_WRITE_CTRL_REG);
79 platform_pl310_write_debug(struct pl310_softc *sc, uint32_t val)
81 ti_smc0(val, 0, L2CACHE_WRITE_DEBUG_REG);