1 /*- 2 * Copyright (c) 2018-2020 Ruslan Bukin <br@bsdpad.com> 3 * All rights reserved. 4 * 5 * This software was developed by SRI International and the University of 6 * Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237 7 * ("CTSRD"), as part of the DARPA CRASH research programme. 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 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/bus.h> 37 #include <sys/rman.h> 38 #include <sys/kernel.h> 39 #include <sys/module.h> 40 #include <machine/bus.h> 41 42 #include <arm64/coresight/coresight.h> 43 44 #include "coresight_if.h" 45 46 extern struct coresight_device_list cs_devs; 47 48 static struct coresight_device * 49 coresight_next_device(struct coresight_device *cs_dev, 50 struct coresight_event *event) 51 { 52 struct coresight_device *out; 53 struct endpoint *out_endp; 54 struct endpoint *endp; 55 56 TAILQ_FOREACH(endp, &cs_dev->pdata->endpoints, link) { 57 if (endp->input != 0) 58 continue; 59 60 out = coresight_get_output_device(endp, &out_endp); 61 if (out != NULL) { 62 if (LIST_EMPTY(&event->endplist)) { 63 /* Add source device */ 64 endp->cs_dev = cs_dev; 65 LIST_INSERT_HEAD(&event->endplist, endp, 66 endplink); 67 } 68 69 /* Add output device */ 70 if (bootverbose) 71 printf("Adding device %s to the chain\n", 72 device_get_nameunit(out->dev)); 73 out_endp->cs_dev = out; 74 LIST_INSERT_HEAD(&event->endplist, out_endp, endplink); 75 76 return (out); 77 } 78 } 79 80 return (NULL); 81 } 82 83 static int 84 coresight_build_list(struct coresight_device *cs_dev, 85 struct coresight_event *event) 86 { 87 struct coresight_device *out; 88 89 out = cs_dev; 90 while (out != NULL) 91 out = coresight_next_device(out, event); 92 93 return (0); 94 } 95 96 int 97 coresight_init_event(int cpu, struct coresight_event *event) 98 { 99 struct coresight_device *cs_dev; 100 struct endpoint *endp; 101 102 /* Start building path from source device */ 103 TAILQ_FOREACH(cs_dev, &cs_devs, link) { 104 if (cs_dev->dev_type == event->src && 105 cs_dev->pdata->cpu == cpu) { 106 LIST_INIT(&event->endplist); 107 coresight_build_list(cs_dev, event); 108 break; 109 } 110 } 111 112 /* Ensure Coresight is initialized for the CPU */ 113 TAILQ_FOREACH(cs_dev, &cs_devs, link) { 114 if (cs_dev->dev_type == CORESIGHT_CPU_DEBUG && 115 cs_dev->pdata->cpu == cpu) 116 CORESIGHT_INIT(cs_dev->dev); 117 } 118 119 /* Init all devices in the path */ 120 LIST_FOREACH(endp, &event->endplist, endplink) { 121 cs_dev = endp->cs_dev; 122 CORESIGHT_INIT(cs_dev->dev); 123 } 124 125 return (0); 126 } 127 128 void 129 coresight_enable(int cpu, struct coresight_event *event) 130 { 131 struct coresight_device *cs_dev; 132 struct endpoint *endp; 133 134 LIST_FOREACH(endp, &event->endplist, endplink) { 135 cs_dev = endp->cs_dev; 136 CORESIGHT_ENABLE(cs_dev->dev, endp, event); 137 } 138 } 139 140 void 141 coresight_disable(int cpu, struct coresight_event *event) 142 { 143 struct coresight_device *cs_dev; 144 struct endpoint *endp; 145 146 LIST_FOREACH(endp, &event->endplist, endplink) { 147 cs_dev = endp->cs_dev; 148 CORESIGHT_DISABLE(cs_dev->dev, endp, event); 149 } 150 } 151 152 void 153 coresight_read(int cpu, struct coresight_event *event) 154 { 155 struct endpoint *endp; 156 157 LIST_FOREACH(endp, &event->endplist, endplink) 158 CORESIGHT_READ(endp->cs_dev->dev, endp, event); 159 } 160