omap4_l2cache.c revision 330897 
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: stable/11/sys/arm/ti/omap4/omap4_l2cache.c 330897 2018-03-14 03:19:51Z eadler $");
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 <arm/ti/ti_smc.h>
38#include <arm/ti/omap4/omap4_smc.h>
39#include <machine/bus.h>
40#include <machine/pl310.h>
41
42void
43platform_pl310_init(struct pl310_softc *sc)
44{
45	uint32_t aux, prefetch;
46
47	aux = pl310_read4(sc, PL310_AUX_CTRL);
48	prefetch = pl310_read4(sc, PL310_PREFETCH_CTRL);
49
50	/*
51	 * Disable instruction prefetch
52	 */
53	prefetch &= ~PREFETCH_CTRL_INSTR_PREFETCH;
54	aux &= ~AUX_CTRL_INSTR_PREFETCH;
55
56	// prefetch &= ~PREFETCH_CTRL_DATA_PREFETCH;
57	// aux &= ~AUX_CTRL_DATA_PREFETCH;
58
59	/*
60	 * Make sure data prefetch is on
61	 */
62	prefetch |= PREFETCH_CTRL_DATA_PREFETCH;
63	aux |= AUX_CTRL_DATA_PREFETCH;
64
65	/*
66	 * TODO: add tunable for prefetch offset
67	 * and experiment with performance
68	 */
69
70	ti_smc0(aux, 0, WRITE_AUXCTRL_REG);
71	ti_smc0(prefetch, 0, WRITE_PREFETCH_CTRL_REG);
72}
73
74void
75platform_pl310_write_ctrl(struct pl310_softc *sc, uint32_t val)
76{
77	ti_smc0(val, 0, L2CACHE_WRITE_CTRL_REG);
78}
79
80void
81platform_pl310_write_debug(struct pl310_softc *sc, uint32_t val)
82{
83	ti_smc0(val, 0, L2CACHE_WRITE_DEBUG_REG);
84}
85