2 * Copyright (c) 2018-2020 Ruslan Bukin <br@bsdpad.com>
5 * This software was developed by BAE Systems, the University of Cambridge
6 * Computer Laboratory, and Memorial University under DARPA/AFRL contract
7 * FA8650-15-C-7558 ("CADETS"), as part of the DARPA Transparent Computing
8 * (TC) research program.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #include <sys/param.h>
36 #include <sys/systm.h>
39 #include <sys/kernel.h>
40 #include <sys/module.h>
41 #include <machine/bus.h>
43 #include <arm64/coresight/coresight.h>
44 #include <arm64/coresight/coresight_replicator.h>
46 #include "coresight_if.h"
48 static struct resource_spec replicator_spec[] = {
49 { SYS_RES_MEMORY, 0, RF_ACTIVE },
54 replicator_init(device_t dev)
56 struct replicator_softc *sc;
58 sc = device_get_softc(dev);
60 /* Unlock Coresight */
61 bus_write_4(sc->res, CORESIGHT_LAR, CORESIGHT_UNLOCK);
67 replicator_enable(device_t dev, struct endpoint *endp,
68 struct coresight_event *event)
70 struct replicator_softc *sc;
72 sc = device_get_softc(dev);
74 /* Enable the port. Keep the other port disabled */
76 bus_write_4(sc->res, REPLICATOR_IDFILTER0, 0x00);
77 bus_write_4(sc->res, REPLICATOR_IDFILTER1, 0xff);
79 bus_write_4(sc->res, REPLICATOR_IDFILTER0, 0xff);
80 bus_write_4(sc->res, REPLICATOR_IDFILTER1, 0x00);
87 replicator_disable(device_t dev, struct endpoint *endp,
88 struct coresight_event *event)
90 struct replicator_softc *sc;
92 sc = device_get_softc(dev);
94 bus_write_4(sc->res, REPLICATOR_IDFILTER0, 0xff);
95 bus_write_4(sc->res, REPLICATOR_IDFILTER1, 0xff);
99 replicator_attach(device_t dev)
101 struct replicator_softc *sc;
102 struct coresight_desc desc;
104 sc = device_get_softc(dev);
106 if (bus_alloc_resources(dev, replicator_spec, &sc->res) != 0) {
107 device_printf(dev, "cannot allocate resources for device\n");
111 desc.pdata = sc->pdata;
113 desc.dev_type = CORESIGHT_DYNAMIC_REPLICATOR;
114 coresight_register(&desc);
119 static device_method_t replicator_methods[] = {
120 /* Coresight interface */
121 DEVMETHOD(coresight_init, replicator_init),
122 DEVMETHOD(coresight_enable, replicator_enable),
123 DEVMETHOD(coresight_disable, replicator_disable),
127 DEFINE_CLASS_0(replicator, replicator_driver, replicator_methods,
128 sizeof(struct replicator_softc));