bcm2835_machdep.c revision 331722 
1/*-
2 * Copyright (c) 2012 Oleksandr Tymoshenko.
3 * Copyright (c) 1994-1998 Mark Brinicombe.
4 * Copyright (c) 1994 Brini.
5 * All rights reserved.
6 *
7 * This code is derived from software written for Brini by Mark Brinicombe
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *      This product includes software developed by Brini.
20 * 4. The name of the company nor the name of the author may be used to
21 *    endorse or promote products derived from this software without specific
22 *    prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
28 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
29 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
30 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: FreeBSD: //depot/projects/arm/src/sys/arm/at91/kb920x_machdep.c, rev 45
37 */
38
39#include "opt_ddb.h"
40#include "opt_platform.h"
41
42#include <sys/cdefs.h>
43__FBSDID("$FreeBSD: stable/11/sys/arm/broadcom/bcm2835/bcm2835_machdep.c 331722 2018-03-29 02:50:57Z eadler $");
44
45#include <sys/param.h>
46#include <sys/systm.h>
47#include <sys/bus.h>
48#include <sys/devmap.h>
49
50#include <vm/vm.h>
51#include <vm/pmap.h>
52
53#include <machine/bus.h>
54#include <machine/machdep.h>
55#include <machine/platform.h>
56#include <machine/platformvar.h>
57
58#include <dev/fdt/fdt_common.h>
59
60#include <arm/broadcom/bcm2835/bcm2835_wdog.h>
61
62#include "platform_if.h"
63
64static vm_offset_t
65bcm2835_lastaddr(platform_t plat)
66{
67
68	return (devmap_lastaddr());
69}
70
71static void
72bcm2835_late_init(platform_t plat)
73{
74	phandle_t system;
75	pcell_t cells[2];
76	int len;
77
78	system = OF_finddevice("/system");
79	if (system != 0) {
80		len = OF_getencprop(system, "linux,serial", cells,
81		    sizeof(cells));
82		if (len > 0)
83			board_set_serial(((uint64_t)cells[0]) << 32 | cells[1]);
84
85		len = OF_getencprop(system, "linux,revision", cells,
86		    sizeof(cells));
87		if (len > 0)
88			board_set_revision(cells[0]);
89	}
90}
91
92#ifdef SOC_BCM2835
93/*
94 * Set up static device mappings.
95 * All on-chip peripherals exist in a 16MB range starting at 0x20000000.
96 * Map the entire range using 1MB section mappings.
97 */
98static int
99bcm2835_devmap_init(platform_t plat)
100{
101
102	devmap_add_entry(0x20000000, 0x01000000);
103	return (0);
104}
105#endif
106
107#ifdef SOC_BCM2836
108static int
109bcm2836_devmap_init(platform_t plat)
110{
111
112	devmap_add_entry(0x3f000000, 0x01000000);
113	return (0);
114}
115#endif
116
117
118
119void
120cpu_reset()
121{
122	bcmwd_watchdog_reset();
123	while (1);
124}
125
126#ifdef SOC_BCM2835
127static platform_method_t bcm2835_methods[] = {
128	PLATFORMMETHOD(platform_devmap_init,	bcm2835_devmap_init),
129	PLATFORMMETHOD(platform_lastaddr,	bcm2835_lastaddr),
130	PLATFORMMETHOD(platform_late_init,	bcm2835_late_init),
131
132	PLATFORMMETHOD_END,
133};
134FDT_PLATFORM_DEF(bcm2835, "bcm2835", 0, "raspberrypi,model-b", 0);
135#endif
136
137#ifdef SOC_BCM2836
138static platform_method_t bcm2836_methods[] = {
139	PLATFORMMETHOD(platform_devmap_init,	bcm2836_devmap_init),
140	PLATFORMMETHOD(platform_lastaddr,	bcm2835_lastaddr),
141	PLATFORMMETHOD(platform_late_init,	bcm2835_late_init),
142
143	PLATFORMMETHOD_END,
144};
145FDT_PLATFORM_DEF(bcm2836, "bcm2836", 0, "brcm,bcm2709", 0);
146#endif
147