1 /*-
2 * Copyright 2013-2015 John Wehle <john@feith.com>
3 * All rights reserved.
4 *
5 * Based on omap4_l2cache.c by Olivier Houchard
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD$
29 */
30
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
33
34 #include <sys/types.h>
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/bus.h>
38 #include <sys/rman.h>
39 #include <sys/lock.h>
40 #include <sys/mutex.h>
41
42 #include <machine/bus.h>
43 #include <machine/pl310.h>
44
45 void
platform_pl310_init(struct pl310_softc * sc)46 platform_pl310_init(struct pl310_softc *sc)
47 {
48 uint32_t aux;
49
50 aux = pl310_read4(sc, PL310_AUX_CTRL);
51
52 /*
53 * The Amlogic Linux platform code enables via AUX:
54 *
55 * Early BRESP
56 * Full Line of Zero (which must match processor setting)
57 * Data Prefetch
58 *
59 * and additionally on the m6 enables:
60 *
61 * Instruction Prefetch
62 *
63 * For the moment we only enable Data Prefetch ...
64 * further refinements can happen as things mature.
65 */
66
67 /*
68 * Disable instruction prefetch.
69 */
70 aux &= ~AUX_CTRL_INSTR_PREFETCH;
71
72 /*
73 * Enable data prefetch.
74 */
75 aux |= AUX_CTRL_DATA_PREFETCH;
76
77 pl310_write4(sc, PL310_AUX_CTRL, aux);
78 }
79
80 void
platform_pl310_write_ctrl(struct pl310_softc * sc,uint32_t val)81 platform_pl310_write_ctrl(struct pl310_softc *sc, uint32_t val)
82 {
83
84 pl310_write4(sc, PL310_CTRL, val);
85 }
86
87 void
platform_pl310_write_debug(struct pl310_softc * sc,uint32_t val)88 platform_pl310_write_debug(struct pl310_softc *sc, uint32_t val)
89 {
90
91 pl310_write4(sc, PL310_DEBUG_CTRL, val);
92 }
93