bcm2835_machdep.c revision 330897 
1/*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 2012 Oleksandr Tymoshenko.
5 * Copyright (c) 1994-1998 Mark Brinicombe.
6 * Copyright (c) 1994 Brini.
7 * All rights reserved.
8 *
9 * This code is derived from software written for Brini by Mark Brinicombe
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 *    must display the following acknowledgement:
21 *      This product includes software developed by Brini.
22 * 4. The name of the company nor the name of the author may be used to
23 *    endorse or promote products derived from this software without specific
24 *    prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
28 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
30 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
31 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
32 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * from: FreeBSD: //depot/projects/arm/src/sys/arm/at91/kb920x_machdep.c, rev 45
39 */
40
41#include "opt_ddb.h"
42#include "opt_platform.h"
43
44#include <sys/cdefs.h>
45__FBSDID("$FreeBSD: stable/11/sys/arm/broadcom/bcm2835/bcm2835_machdep.c 330897 2018-03-14 03:19:51Z eadler $");
46
47#include <sys/param.h>
48#include <sys/systm.h>
49#include <sys/bus.h>
50#include <sys/devmap.h>
51
52#include <vm/vm.h>
53#include <vm/pmap.h>
54
55#include <machine/bus.h>
56#include <machine/machdep.h>
57#include <machine/platform.h>
58#include <machine/platformvar.h>
59
60#include <dev/fdt/fdt_common.h>
61
62#include <arm/broadcom/bcm2835/bcm2835_wdog.h>
63
64#include "platform_if.h"
65
66static vm_offset_t
67bcm2835_lastaddr(platform_t plat)
68{
69
70	return (devmap_lastaddr());
71}
72
73static void
74bcm2835_late_init(platform_t plat)
75{
76	phandle_t system;
77	pcell_t cells[2];
78	int len;
79
80	system = OF_finddevice("/system");
81	if (system != 0) {
82		len = OF_getencprop(system, "linux,serial", cells,
83		    sizeof(cells));
84		if (len > 0)
85			board_set_serial(((uint64_t)cells[0]) << 32 | cells[1]);
86
87		len = OF_getencprop(system, "linux,revision", cells,
88		    sizeof(cells));
89		if (len > 0)
90			board_set_revision(cells[0]);
91	}
92}
93
94#ifdef SOC_BCM2835
95/*
96 * Set up static device mappings.
97 * All on-chip peripherals exist in a 16MB range starting at 0x20000000.
98 * Map the entire range using 1MB section mappings.
99 */
100static int
101bcm2835_devmap_init(platform_t plat)
102{
103
104	devmap_add_entry(0x20000000, 0x01000000);
105	return (0);
106}
107#endif
108
109#ifdef SOC_BCM2836
110static int
111bcm2836_devmap_init(platform_t plat)
112{
113
114	devmap_add_entry(0x3f000000, 0x01000000);
115	return (0);
116}
117#endif
118
119
120
121void
122cpu_reset()
123{
124	bcmwd_watchdog_reset();
125	while (1);
126}
127
128#ifdef SOC_BCM2835
129static platform_method_t bcm2835_methods[] = {
130	PLATFORMMETHOD(platform_devmap_init,	bcm2835_devmap_init),
131	PLATFORMMETHOD(platform_lastaddr,	bcm2835_lastaddr),
132	PLATFORMMETHOD(platform_late_init,	bcm2835_late_init),
133
134	PLATFORMMETHOD_END,
135};
136FDT_PLATFORM_DEF(bcm2835, "bcm2835", 0, "raspberrypi,model-b", 0);
137#endif
138
139#ifdef SOC_BCM2836
140static platform_method_t bcm2836_methods[] = {
141	PLATFORMMETHOD(platform_devmap_init,	bcm2836_devmap_init),
142	PLATFORMMETHOD(platform_lastaddr,	bcm2835_lastaddr),
143	PLATFORMMETHOD(platform_late_init,	bcm2835_late_init),
144
145	PLATFORMMETHOD_END,
146};
147FDT_PLATFORM_DEF(bcm2836, "bcm2836", 0, "brcm,bcm2709", 0);
148#endif
149