mainbus.c revision 1.6 
1/*	$NetBSD: mainbus.c,v 1.6 2017/05/19 07:40:58 skrll Exp $ */
2
3/*-
4 * Copyright (c) 2014 Michael Lorenz
5 * All rights reserved.
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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__KERNEL_RCSID(0, "$NetBSD: mainbus.c,v 1.6 2017/05/19 07:40:58 skrll Exp $");
31
32#include "opt_multiprocessor.h"
33
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/device.h>
37
38#include <mips/cache.h>
39#include <mips/cpuregs.h>
40
41#include <mips/ingenic/ingenic_regs.h>
42
43#include "opt_ingenic.h"
44
45#include "locators.h"
46
47static int	mainbus_match(device_t, cfdata_t, void *);
48static void	mainbus_attach(device_t, device_t, void *);
49static int	mainbus_print(void *, const char *);
50
51CFATTACH_DECL_NEW(mainbus, 0,
52    mainbus_match, mainbus_attach, NULL, NULL);
53
54/* There can be only one. */
55int	mainbus_found = 0;
56
57struct mainbusdev {
58	const char *md_name;
59};
60
61struct mainbusdev mainbusdevs[] = {
62	{ "cpu",	},
63#ifdef MULTIPROCESSOR
64	{ "cpu",	},
65#endif
66	{ "apbus",	},
67	{ NULL,		}
68};
69
70static int
71mainbus_match(device_t parent, cfdata_t match, void *aux)
72{
73
74	if (mainbus_found)
75		return (0);
76
77	return (1);
78}
79
80static void
81mainbus_attach(device_t parent, device_t self, void *aux)
82{
83	const struct mainbusdev *md;
84
85	mainbus_found = 1;
86	printf("\n");
87
88	for (md = mainbusdevs; md->md_name != NULL; md++) {
89		struct mainbusdev ma = *md;
90		config_found_ia(self, "mainbus", &ma, mainbus_print);
91	}
92
93#ifdef INGENIC_DEBUG
94	printf("TFR: %08x\n", readreg(JZ_TC_TFR));
95	printf("TMR: %08x\n", readreg(JZ_TC_TMR));
96
97	/* send ourselves an IPI */
98	MTC0(0x12345678, CP0_CORE_MBOX, 0);
99	delay(1000);
100
101	/* send the other core an IPI */
102	MTC0(0x12345678, CP0_CORE_MBOX, 1);
103	delay(1000);
104#endif
105}
106
107static int
108mainbus_print(void *aux, const char *pnp)
109{
110
111	return (QUIET);
112}
113