1 /*- 2 * Copyright (c) 2018-2020 Ruslan Bukin <br@bsdpad.com> 3 * All rights reserved. 4 * 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. 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/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/bus.h> 38 #include <sys/rman.h> 39 #include <sys/kernel.h> 40 #include <sys/module.h> 41 #include <machine/bus.h> 42 43 #include <dev/ofw/ofw_bus.h> 44 #include <dev/ofw/ofw_bus_subr.h> 45 46 #include <arm64/coresight/coresight.h> 47 #include <arm64/coresight/coresight_etm4x.h> 48 49 #include "coresight_if.h" 50 51 static struct ofw_compat_data compat_data[] = { 52 { "arm,coresight-etm4x", 1 }, 53 { NULL, 0 } 54 }; 55 56 static int 57 etm_fdt_probe(device_t dev) 58 { 59 if (!ofw_bus_status_okay(dev)) 60 return (ENXIO); 61 62 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 63 return (ENXIO); 64 65 device_set_desc(dev, "AArch64 Embedded Trace Macrocell"); 66 67 return (BUS_PROBE_DEFAULT); 68 } 69 70 static int 71 etm_fdt_attach(device_t dev) 72 { 73 struct etm_softc *sc; 74 75 sc = device_get_softc(dev); 76 sc->pdata = coresight_fdt_get_platform_data(dev); 77 78 return (etm_attach(dev)); 79 } 80 81 static device_method_t etm_fdt_methods[] = { 82 /* Device interface */ 83 DEVMETHOD(device_probe, etm_fdt_probe), 84 DEVMETHOD(device_attach, etm_fdt_attach), 85 DEVMETHOD_END 86 }; 87 88 DEFINE_CLASS_1(etm, etm_fdt_driver, etm_fdt_methods, 89 sizeof(struct etm_softc), etm_driver); 90 91 static devclass_t etm_fdt_devclass; 92 93 EARLY_DRIVER_MODULE(etm, simplebus, etm_fdt_driver, etm_fdt_devclass, 94 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE); 95