1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2024 Arm Ltd
5 * Copyright (c) 2022 The FreeBSD Foundation
6 *
7 * Portions of this software were developed by Andrew Turner under sponsorship
8 * from the FreeBSD Foundation.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/param.h>
33 #include <sys/bus.h>
34 #include <sys/kernel.h>
35 #include <sys/lock.h>
36 #include <sys/module.h>
37 #include <sys/mutex.h>
38
39 #include <dev/ofw/ofw_bus.h>
40 #include <dev/ofw/ofw_bus_subr.h>
41 #include <dev/ofw/openfirm.h>
42
43 #include <arm64/spe/arm_spe_dev.h>
44
45 static device_probe_t arm_spe_fdt_probe;
46
47 static struct ofw_compat_data compat_data[] = {
48 {"arm,statistical-profiling-extension-v1", true},
49 {NULL, false},
50 };
51
52 static device_method_t arm_spe_fdt_methods[] = {
53 /* Device interface */
54 DEVMETHOD(device_probe, arm_spe_fdt_probe),
55
56 DEVMETHOD_END,
57 };
58
59 DEFINE_CLASS_1(spe, arm_spe_fdt_driver, arm_spe_fdt_methods,
60 sizeof(struct arm_spe_softc), arm_spe_driver);
61
62 DRIVER_MODULE(spe, simplebus, arm_spe_fdt_driver, 0, 0);
63
64 static int
arm_spe_fdt_probe(device_t dev)65 arm_spe_fdt_probe(device_t dev)
66 {
67 if (!ofw_bus_status_okay(dev))
68 return (ENXIO);
69
70 if (!ofw_bus_search_compatible(dev, compat_data)->ocd_data)
71 return (ENXIO);
72
73 device_set_desc(dev, "ARM Statistical Profiling Extension");
74 return (BUS_PROBE_DEFAULT);
75 }
76